JPH09304593A - Concrete stripping equipment - Google Patents

Abstract

(57) [Abstract] [Problem] Controllability, workability, and reliability of a concrete stripping apparatus are low. SOLUTION: A gyrotron device 6 for generating microwaves, a radiator 8 provided at an output end of the gyrotron device for radiating microwaves output from the gyrotron device, and provided opposite to the radiator. The microwave radiated from the radiated radiator to the axis 6a of the gyrotron device.
The reflecting mirror 9 for reflecting and focusing in the direction intersecting with the irradiation target 4 and irradiating the irradiation target 4, and the shaft 6 of the gyrotron device with at least the positional relationship between the radiator and the reflecting mirror being maintained.
First rotating means 2 for rotating about an axis 26 parallel to a
2 and. Further, the gyrotron device was installed so that its output end was located below, and the radiator and the reflecting mirror were arranged below the gyrotron device. A plane mirror arranged in the propagation path of the microwave reflected by the reflecting mirror and bending the propagation path of the reflected microwave was provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a gyrotron device that generates electromagnetic waves in the millimeter wave region from microwaves to irradiate the generated high-power microwaves onto the surface of concrete, which is an object to be contaminated, and is contaminated. The present invention relates to a concrete peeling device for peeling concrete.

[0002]

2. Description of the Related Art After the year 2010, many nuclear power plants currently in operation (hereinafter abbreviated as "nuclear power plants") have reached the end of their lives. Moreover, the difficulty of locating the nuclear power plant is not expected to be resolved in the future, and it is desirable to be able to reconstruct it in the same place in order to meet the ever-increasing power demand. For this purpose, the dismantling work of the nuclear power plant is indispensable, and in order to reduce the radiation exposure during the dismantling work as much as possible, it is indispensable to remove the radioactive substances in advance.

Generally, the proportion of concrete waste generated in decommissioning of nuclear power plants exceeds 90%, but only a small part of this concrete waste has a high activation level. Therefore, there is a demand for a demolition method in which this concrete waste is separately managed into a high activation level portion and a low activation level portion for efficient treatment.

FIG. 26 shows a state after removing the internal structure of a pressurized water nuclear reactor having a cylindrical internal structure, and FIG. 27 shows the state of removing the internal structure of a boiling water nuclear reactor. The latter state is shown. Although the shield concrete body remains after the removal of the in-core structure, the activated portion of the concrete body, which is particularly called the living body shield wall around the core, is a portion of the concrete body which is activated. In addition, as shown in Figure 28 ("6th Report and Lecture Meeting" hosted by the Nuclear Facilities Dumuting Research Association of Japan, H6.11.7), the penetration depth of radioactivity into the concrete surface is at a predetermined level. Under these conditions, cobalt 60 is 4 mm and cesium 137 is 11 mm. Therefore, it is necessary to remove the contaminated part first in order to reduce the radiation exposure due to the dismantling of the nuclear power plant.

Conventionally, a concrete surface layer peeling device for peeling layered concrete that has been activated by using a magnetron as a microwave generation source has been known (Yasu Naga et al., “Contamination by microwaves on concrete surface layer in JPDR. Removal "Reactor Dismantling International Symposium Record
Page 109 to page 115, October 4 to 8, 1987), FIG. 29 is a perspective view of the entire concrete surface layer peeling apparatus. In the figure, 1 is a magnetron (frequency 2.45 GHz, output 5 kW or 10 kW) which is a microwave generation source, 2
Is a waveguide that is connected to the magnetron 1 and transmits the microwave generated in the magnetron 1 with low loss. Reference numeral 3 is provided at the tip of the waveguide 2 and is transmitted from the magnetron 1 through the waveguide 2. Electromagnetic horns 5 for irradiating the concrete body 4, which is an object to be irradiated, with microwaves, are vacuum hoses provided adjacent to the electromagnetic horn 3 for absorbing and collecting the separated concrete pieces.

In the concrete stripping apparatus thus constructed, the microwave generated in the magnetron 1 is irradiated from the electromagnetic horn 3 toward the concrete body 4 through the waveguide 2. The irradiated microwave penetrates from the surface of the concrete body 4 to the inside, but the energy of the microwave is gradually absorbed by the dielectric loss and converted into heat. Since the microwave energy is also absorbed by the moisture contained in the concrete body 4, the moisture rapidly evaporates and expands, the internal pressure rises, and the strain stress due to the heat generation of the concrete body also adds to the concrete body. The surface layer of No. 4 exploded and became a concrete piece and was peeled off. The peeled concrete piece is sucked up by the vacuum hose 5 and collected.

[0007]

The conventional concrete stripping apparatus utilizing the microwaves generated by the magnetron 1 is constructed as described above, and the microwave generated by one magnetron has a frequency of 2.45 GHz. The output is about 10 kW at most (in the above-mentioned paper by Yasunaga et al., Three magnetrons of 2.45 GHz and 5 kW are used in parallel), and the microwave output is insufficient. Further, when the microwave is radiated into the space, it is diffused, and the power density of the microwave on the irradiation target is lowered. Therefore, in order to secure a predetermined irradiation intensity, as shown in FIG. 29, it is necessary to bring the electromagnetic horn 3 closer to the concrete body 4 (for example, at an interval of about 20 mm) for irradiation. Therefore, when the irradiated surface of the concrete body 4 has a cylindrical shape (the pressurized water reactor shown in FIGS. 26 and 27,
And the inside of the boiling water reactor is constructed in a cylindrical shape), in order to bring the electromagnetic horn 3 close to the surface of the concrete body 4, it is necessary to prepare an electromagnetic horn having a shape corresponding to the surface shape. was there. Also, concrete body 4
In order to peel concrete over a large area on the surface of the concrete, it is necessary to scan the concrete surface with microwaves. For this purpose, the entire apparatus including magnetron 1, waveguide 2 and electromagnetic horn 3 is moved. However, there is also a problem that the workability of peeling off the concrete surface layer is poor.

FIG. 30 shows a concrete surface layer peeling device using a prior gyrotron device disclosed in Japanese Patent Application No. 7-240068. In the figure, 6 is a gyrotron device (referred to as a gyrotron in Japanese Patent Application No. 7-240068). The gyrotron device 6 is 10 kW at a frequency (eg 28 GHz) higher than the magnetron 1 shown in FIG. 29 by one digit or more.
It is an electron tube that can continuously generate the above high-power microwaves. Reference numeral 7 is a waveguide that is connected to the gyrotron device 6 and transmits high-power microwaves, and 8 is provided at the tip of the waveguide 7, and is transmitted from the gyrotron device 6 through the waveguide 7. A radiator for emitting high-power microwaves (referred to as an irradiator in Japanese Patent Application No. 7-240068), 9 is installed facing the radiator 8 and radiated from the radiator 8. A rotary reflecting mirror that focuses and irradiates a high-power microwave on a concrete body 4 as an object to be irradiated, 11 is a cooling device that is installed adjacent to the gyrotron device 6 and cools the gyrotron device 6, and 12 is these. It is a crane as a moving means for suspending equipment and accessing the concrete body 4. The reflecting mirror 9 is a means for moving the microwave irradiation position on the concrete body 4 (specifically, the reflecting mirror 9 can be rotated as shown by an arrow A or can be tilted as shown by an arrow B). ing)
Is provided. Further, the reflecting mirror 9 is the concrete body 4
There is also provided means for changing the irradiation area of the microwave with respect to (the reflecting mirror 9 can be moved as shown by an arrow C). Reference numeral 13 is a gyrotron power supply for operating the gyrotron device 6, and 14 is a remote control device for controlling the position, rotation angle, elevation angle and the like of the gyrotron power supply 13 and the rotary reflecting mirror 9. The gyrotron power source 13 and the remote control device 14 are not mounted on the crane 12 in order to reduce the suspension load of the crane 12, but are installed in another place. The gyrotron device 6 and the reflecting mirror 9 are connected to a cable (not shown). ) Is connected.
In such a concrete surface layer peeling device, as described in detail in the above-mentioned Japanese Patent Application No. 7-240068, the electric field of the magnetron 1 and the gyrotron 6 is large because the frequency and output of the gyrotron device are large. Even if the strength is the same, the gyrotron 6 has a larger output frequency, so that the thermal efficiency is greatly improved and the peeling efficiency of the contaminated part is also improved. In addition, the gyrotron device 6 and the like can be easily accessed to the contaminated part by using the crane 12 which is a moving means, and the work platform is assembled like the concrete surface peeling device using the magnetron described in FIG. 29. It is not necessary to move the microwave irradiator on the work stand to perform the work of removing the surface layer of the concrete body 4,
Further, since it is not necessary to guide the microwave to the vicinity of the surface of the concrete body 4 by using the waveguide 2 or the electromagnetic horn 3, working efficiency is significantly improved.

However, since peeling of concrete is affected by the power density of microwaves, the position of the focal point of microwaves, irradiation time, etc., the concrete surface peeling apparatus shown in FIG. There is a problem that it is necessary to finely control the irradiation conditions such as finely adjusting the direction (arrows A and B) and the distance (arrow C). In addition, there is a problem that it is difficult to irradiate microwaves to the lower side of the table on which the gyrotron device 6 and the like are mounted, particularly the bottom concrete of the biological reactor biological shield wall. Furthermore, since the waveguide 7 has a bent portion, there is a problem that microwave conversion and reflection occur inside the waveguide 7 and the peeling efficiency deteriorates.

Further, in the peeling of concrete, moisture in the concrete directly or indirectly absorbs microwave power to raise the temperature and evaporates and expands beyond the boiling point to raise the internal pressure and explode. Caused by.
Therefore, it can be said that water plays an important role in exfoliating concrete. The temperature of the portion of the concrete body 4 that appears from the back after peeling and the concrete around the microwave irradiation location also rises due to absorption of microwaves with a relatively low power density and heat conduction from the peeled portion. Since the temperature rise in this part is relatively slow, even if the moisture in the concrete evaporates and expands, it passes through the minute gaps inside the concrete before the pressure rises to the level necessary for the explosion, Is released to.
These parts are the parts to be peeled from now on,
Due to the above-mentioned phenomenon, the water content in that portion becomes insufficient to explode the concrete, and there is a problem that peeling is affected.

Further, there is a problem that it is impossible to distinguish the already peeled portion and the still portion on the concrete wall surface. In addition, although there are reinforcing bars in the concrete wall, if peeling progresses and the reinforcing bars are exposed, microwaves are reflected by the reinforcing bars, electric discharge occurs, or the reinforcing bars are heated.
The conventional device has a problem that it cannot determine whether the reinforcing bar is exposed. Further, when operating by remote control, there is a problem that it is difficult to accurately confirm the irradiation position of the microwave on the concrete wall in advance.

Further, the microwave reflected by the reflecting mirror 9 advances as a microwave beam. At a certain distance from the reflecting mirror 9, this microwave beam has a minimum cross-sectional area in a plane perpendicular to its propagation direction. This is called the microwave focus, and the distance from the reflecting mirror 9 to the focus is called the focal length. In order to remove efficiently, concrete body 4
It is necessary to position the focus on the surface optimally, but as the peeling progresses, the surface of the concrete body 4 moves away from the concrete peeling device, and the focus of the microwave continues to be positioned at the optimum place on the surface of the concrete body 4. There was a problem that things could not be done.

The present invention has been made to solve the above-mentioned problems, and has controllability of a concrete peeling apparatus,
Aiming to improve workability remarkably, furthermore, it is possible to easily remove concrete from the bottom surface, and also to provide a compact concrete peeling device with good peeling efficiency and reliable peeling that ensures reliable peeling. It is an object.

[0014]

A concrete stripping apparatus according to a first aspect of the present invention is a gyrotron device for generating a microwave, and a microwave output from the gyrotron device provided at an output end of the gyrotron device. A radiator that radiates, and a reflecting mirror that is provided to face the radiator and focuses the microwave radiated from the radiator in a direction intersecting with the axis of the gyrotron device to irradiate the irradiation target, A first rotating means is provided for rotating the radiator and the reflecting mirror about an axis parallel to the axis of the gyrotron device while maintaining the positional relationship between the radiator and the reflecting mirror.

In the concrete stripping apparatus according to the second aspect of the present invention, the gyrotron device is installed such that its output end is located below, and the radiator and the reflecting mirror are located below the gyrotron device. Is.

A concrete peeling apparatus according to a third aspect of the present invention is provided with a plane mirror which is arranged in a propagation path of the microwave reflected by the reflecting mirror and bends the propagation path of the reflected microwave. .

In the concrete stripping apparatus according to the fourth aspect of the present invention, the plane mirror is constructed so that it can be put in and taken out of a microwave propagation path.

A concrete stripping apparatus according to a fifth aspect of the present invention includes a gyrotron device, a radiator, and a reflector around an axis intersecting the axis of the gyrotron device while maintaining the positional relationship between the radiator and the reflector. It is provided with a second rotating means for rotating the same.

In the concrete stripping apparatus according to the sixth invention, the gyrotron device comprises a gyrotron for generating a microwave and a magnetic field generating device for generating a magnetic field necessary for generating the microwave. It is a permanent magnet or a combination of a permanent magnet and an auxiliary electromagnet.

The concrete stripping apparatus according to the seventh aspect of the present invention is a concrete peeling apparatus for irradiating an object such as a temperature of a peripheral portion of a microwave irradiation position of the object, a shape or color of the object, and a distance to the object. It is provided with means for acquiring information on the state, and the operating conditions are controlled based on the obtained information.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. 1 is a diagram showing a configuration of a concrete stripping apparatus according to Embodiment 1 of the present invention. In the figure,
6 is a gyrotron device for generating high-power microwaves, 8 is an emitter attached to the output end of the gyrotron device 6, and radiates the microwaves output from the gyrotron device 6, and 9 is radiated from the radiator 8. A reflecting mirror that reflects and focuses the microwave in a direction intersecting with the axis 6a of the gyrotron device 6 and irradiates the concrete 4 which is an irradiation target, and 21 fixes the positional relationship between the radiator 8 and the reflecting mirror 9. It is a reflector support. Reference numeral 22 denotes a first rotating means for rotating a concrete peeling mechanism including the gyrotron device 6, the radiator 8 and the reflecting mirror 9.
Is a rotating device, 23 is a suspension beam, and 24a and 24b are suspension rods. The first rotating device 22 is the shaft 6 of the gyrotron device.
The rotation axis 26 is a (vertical direction), and the concrete peeling mechanism is rotated around the axis 26 (circumferential direction). The radiator 8, the reflecting mirror 9, and the suspension rods 24a and 24b
Means that the microwave reflected by the reflecting mirror 9 is the hanging rod 24a,
It is arranged so as not to hit b. A suspender 25 such as an eyebolt is attached to the upper part of the first rotating device 22, and the concrete removing mechanism is movable in the vertical direction and the horizontal direction by the crane 12. Although not shown in the figure, the gyrotron power supply, the remote control device that controls the gyrotron power supply and the rotating device 22, and the cooling device that supplies cooling water do not need to move together with the concrete peeling mechanism, so they are separate. It is installed in the place.

FIG. 2 shows an example of the configuration of the radiator 8 and the reflecting mirror 9 and its operation. A solid arrow M in the drawing indicates a microwave propagation path. The radiator 8 includes a gyrotron device 6
For example, a TE _0n mode microwave output from the unit enters. The radiator 8 shown in the figure is obtained by cutting a circular waveguide in a stepwise manner, and has a length in the direction of the tube axis (corresponding to the axis 6a of the gyrotron device) of the "eave" -shaped portion protruding from the circular opening. L is given by the following equation. L ≧ 2r · cot θ (1) where r is the waveguide radius, θ is the angle formed by the element plane wave propagating in the waveguide with the tube axis 6a, and is represented by the following equation. θ = sin ^-1 (kc / k) (2) k = 2π / λ ₀ kc = χ ' _0n / r where λ ₀ is the free space wavelength and χ' _0n is the Bessel function J '
It is the n-th root except ₀ (χ) = 0. With such a coordinate system as shown in FIG. 2, in such a radiator 8, the entire microwave output is radiated in the region of x <0. The reflecting mirror 9 arranged at a position facing the opening of the radiator 8 has a parabolic line of intersection between the curved surface of the reflecting mirror and a plane parallel to the xz plane, and a line of intersection with a plane parallel to the xy plane. It is a curved surface that becomes an elliptic arc. Such radiator 8 and reflecting mirror 9
In combination with, the TE _0n mode microwave output from the gyrotron device 6 is converted into a focused beam having an appropriate focal length, reflected and irradiated in a direction intersecting the axis 6a of the gyrotron device. .

Next, the operation will be described. The TE _0n mode microwave output from the output end of the gyrotron device 6 is converted by the radiator 8 and the reflecting mirror 9 into a beam that is focused in a direction intersecting the axis 6a of the gyrotron device,
The concrete wall 4 is irradiated. By the way, the concrete wall 4 of the nuclear reactor, which is the object to be irradiated, often has an axisymmetric structure. In order to efficiently peel off such concrete wall 4 by microwaves, the irradiation position of microwaves should be set as shown in FIG.
It is changed in a spiral shape as indicated by an arrow in (a), or is changed in a stepwise axial direction after continuously changing the irradiation position in a circumferential direction as indicated by an arrow in FIG. 3 (b). And workability is good. In the concrete stripping apparatus according to this embodiment, the entire concrete stripping mechanism is rotated by the first rotating device 22, so that the microwave irradiation position can be moved in the circumferential direction of the concrete wall 4 in accordance with the rotation. In the case where the concrete wall 4 has a cylindrical shape, if the rotation axis 26 of the rotating device 22 and the central axis of the concrete wall 4 coincide with each other, the focal length of the microwave radiated from the reflecting mirror 9 can be changed without changing the focal length. The microwave irradiation intensity at the irradiation point can be kept constant. Since the irradiation position in the direction of the axis 26 can be moved by the crane 12,
By combining the rotating device 22 and the crane 12, the concrete wall 4 can be efficiently peeled off over a wide range.

In FIG. 1, the central axis 6a of the concrete peeling mechanism and the rotating shaft 26 are aligned with each other, but as shown in FIG. 4, the rotating shaft 26 and the central axis 6a of the concrete peeling mechanism are not necessarily the same. It does not have to match. In the figure, 27 is a weight provided to prevent the concrete peeling mechanism from tilting. In this case, the concrete peeling mechanism including the gyrotron device 6 and the weight 27 move in the circumferential direction, but if the rotating shaft 26 and the center axis of the concrete wall 4 are aligned, the focal length of the microwave is not changed. The irradiation intensity of microwaves at each irradiation point can be kept constant. Further, with this configuration, the rotating shaft 26, the shaft 6a of the gyrotron device and the weight 2 are irrespective of the diameter of the concrete wall 4.
By adjusting the distance from the gyrotron device 7, the distance between the shaft 6a of the gyrotron device and the concrete wall 4 can be kept constant, and the irradiation intensity of microwaves can be kept constant.

Further, as shown in FIG. 5, the gyrotron device 6 has a power supply line 30a from a gyrotron power source,
Since b and the hoses 31a and 31b for cooling water are connected, when the gyrotron device 6 is rotated, these wirings and hoses may be twisted after several rotations, which may hinder the operation. is there. In such a case, the rotating device 2
It is possible to solve the problem by making the rotation direction of 2 bidirectionally clockwise and counterclockwise and reversing the rotation direction every predetermined number of rotations (for example, several rotations). It should be noted that although microwaves are focused by one reflecting mirror 9 in the present embodiment, a plurality of reflecting mirrors may be used, and the same applies to each of the following embodiments. Further, although the radiator 8 is formed by cutting a circular waveguide in a step shape, it may be formed by cutting a circular waveguide obliquely as shown in FIG. Further, when the mode of the microwave output from the gyrotron device 6 is a non-axisymmetric mode such as the Fispering gallery mode such as the TE _15,2 mode, the spiral cutting is performed as shown in FIG. The radiator 8 described above may be used, and the same applies to each of the following embodiments.

Embodiment 2 FIG. FIG. 8 is a diagram showing a configuration of a main part of a concrete stripping apparatus according to Embodiment 2 of the present invention. In the first embodiment, the entire concrete peeling mechanism is rotated, but as shown in FIG.
Alternatively, only the reflecting mirror 9 may be rotated. In the figure, the same reference numerals as those in the conventional and the first embodiment indicate the same or corresponding portions, and therefore the description thereof will be omitted. Reference numeral 22 is a first rotating device for rotating the radiator 8 and the reflecting mirror 9. For example, a driving device 22a such as a motor and a gear 2 are provided.
2b and c. The tube axis of the radiator 8 and the axis 6a of the gyrotron device are always aligned with each other. While maintaining this positional relationship, the radiator 8 uses the bearing or the like at the coupling portion 62 to fix the tube axis 6a. It has a structure that can rotate with respect to the gyrotron device 6 as a rotation axis. The reflecting mirror 9 is always in a position facing the opening of the radiator 8, and the positional relationship between the reflecting mirror 9 and the radiator 8 is always kept constant by the reflecting mirror support 21. The radiator 8 and the driving device 22a are connected to each other by using power transmission means such as gears 22b and 22c, and the rotating device 22 is in a range where the microwave reflected by the reflecting mirror 9 does not hit the suspension rods 24a and 24b. Inside, the radiator 8 and the reflecting mirror 9 are rotated with respect to the gyrotron device 6. In addition to the gears 22b and 22c, a method of using a belt, a method of using a chain, a method of using a roller, and the like can be considered as the power transmission means, and the same applies to each of the following embodiments.

With this structure, as in the first embodiment, the irradiation position of the microwave radiated from the concrete peeling device onto the irradiated body 4 is moved in the circumferential direction and the axial direction of the rotary shaft 6a. The concrete wall 4 can be efficiently peeled off over a wide range. Further, in this embodiment, since the radiator 8 and the reflecting mirror 9 are rotated with respect to the gyrotron device 6, the gyrotron device 6 is also rotated together. , The device becomes simple and inexpensive.

Embodiment 3. Next, a third embodiment of the present invention will be described with reference to FIG. In the figure, the same reference numerals as those in the conventional and the above-mentioned respective embodiments indicate the same or corresponding portions, and thus the description thereof will be omitted. The gyrotron device 6 in the present embodiment is installed such that the output end is located below so as to radiate the microwave downward, and the radiator 8 and the reflecting mirror 9 are installed below the gyrotron device 6. There is. The microwave generated by the gyrotron device 6 is emitted downward from the gyrotron device 6 and is emitted to the reflecting mirror 9 by the radiator 8. Further, the microwave is reflected by the reflecting mirror 9 and is applied to an irradiation target such as the concrete wall 4. With such a configuration, similarly to Embodiments 1 and 2, the irradiation position of the microwave radiated from the concrete peeling device to the irradiation target 4 is set in the circumferential direction and the axial direction of the rotation axis. It can be moved, and the concrete wall 4 can be efficiently peeled off over a wide range. Further, according to the present embodiment, the suspension beam 23 and the suspension rod 24a of FIG.
The number of parts such as b for suspending the concrete peeling mechanism is reduced, and the configuration is simplified.

Embodiment 4 Further, it may be configured as shown in FIG. 10 so that the floor surface of the concrete 4 can be peeled off. In the figure, the same reference numerals as those in the conventional and the above-mentioned respective embodiments indicate the same or corresponding portions, and thus the description thereof will be omitted. Reference numeral 70 is a plane mirror, and 71 is a plane mirror support. Reference numeral 72 denotes a drive device for installing the plane mirror 70 on the propagation path of microwaves or for moving it out of the propagation path. For example, a gear that is rotationally driven by a motor and the like, and is connected to the plane mirror 70 in conjunction with this gear. And a gear that has been set. Next, the operation will be described. In order to separate the side wall of the concrete 4 in the radial direction of the gyrotron device 6, the driving device 72 causes the plane mirror 70 to be moved out of the microwave propagation path (indicated by a broken line in the figure), and the same as in each of the above-described embodiments. Then, the microwave is applied to the side wall of the concrete 4, and the first rotating device 22 is operated. In order to separate the concrete floor surface in the axial direction from the gyrotron device 6, the plane mirror 70 is installed in the microwave propagation path by the drive device 72 (shown by the solid line in the figure), and the plane mirror 70 is used to form the reflecting mirror. The propagation path of the microwave reflected by 9 is bent downward so that the microwave is applied to the floor surface, and the first rotation device 22 is operated. As a result, it is possible to efficiently separate both the concrete side wall and the concrete floor.

It is also possible to change the irradiation position on the floor by adjusting the angle of the plane mirror 70 by the driving device 72. In the above-described embodiment, the gyrotron device 6 is installed so that its output end is located below, and the radiator 8 and the reflecting mirror 9 are arranged below the gyrotron device 6. However, for example, as shown in FIG. 1, the gyrotron device 6 is installed so that its output end is located above, and the radiator 8 and the reflecting mirror 9 are arranged above the gyrotron device 6. 7
0 may be provided and is suitable for peeling off the ceiling.

Embodiment 5. Further, the gyrotron device 6 may not be rotated, and only the radiator 8, the reflecting mirror 9, and the plane mirror 70 may be rotated with respect to the gyrotron device 6. The concrete stripping device in that case is as shown in FIG. In the figure, the same reference numerals as those in the conventional and the above-mentioned respective embodiments indicate the same or corresponding portions, and thus the description thereof will be omitted. In this embodiment, the gear 22b is coupled with the radiator 8, the reflecting mirror support 21, and the plane mirror support 71, and the driving device 22a rotates the radiator 8, the reflecting mirror 9, and the plane mirror 70 with respect to the gyrotron device 6. Let The tube axis of the radiator 8 and the axis 6a of the gyrotron device are always aligned with each other. , And the plane mirror 70 are structured so as to be rotatable about the tube axis 6a. The reflecting mirror 9 is always in a position facing the opening of the radiator 8, and the positional relationship between the reflecting mirror 8 and the radiator 9 is always constant. The plane mirror 70 can be installed in the microwave propagation path by the driving device 72 or can be taken out of the propagation path. With such a configuration, similarly to the fourth embodiment, it is possible to change the irradiation position of the microwave radiated from the concrete peeling device to the irradiation target 4 to a wide range including the floor surface. Further, since the rotating device 22 may be smaller than that of the fourth embodiment in which the gyrotron device 6 is also rotated, the device is simple and inexpensive.

Embodiment 6 FIG. 12 and FIG.
As shown in 3, the concrete peeling mechanism has a horizontal shaft 75.
May be used as a rotation axis. FIG. 13 is a diagram of the device shown in FIG. 12 viewed from the right side of FIG.
In the figure, the same reference numerals as those in the conventional and the above-mentioned respective embodiments indicate the same or corresponding portions, and thus the description thereof will be omitted. Gyrotron device 6, radiator 8, and reflecting mirror 9
The entire concrete peeling mechanism consisting of
It is hoisted by the crane 12 via a suspension beam 23, a rotating device 22, and a suspender 25 such as an eyebolt. Reference numeral 77 denotes an axis (that is, a horizontal axis in this example) 7 that intersects the concrete peeling mechanism with the axis 6a of the gyrotron device.
5 is a second rotating device serving as a second rotating device for rotating 5 as a rotating shaft, and is a drive device 77 such as a motor.
a and a gear 77b for transmitting power from the driving device 77a to the concrete peeling mechanism. Second
The rotating device 77 of the shaft 77 intersects the axis 6a of the gyrotron device while maintaining the positional relationship between the radiator 8 and the reflecting mirror 9 by the concrete peeling mechanism including the gyrotron device 6, the radiator 8 and the reflecting mirror 9. The microwave irradiation position is changed by rotating around. In this way, for example, in order to irradiate the floor surface with microwaves, the axis 6a of the gyrotron device may be oriented in the horizontal direction, and in order to irradiate the side wall surfaces with microwaves, the gyrotron device may be irradiated. The shaft 6a of the device may be oriented in the vertical direction. However, at this time, it is not necessary to strictly align the horizontal direction and the vertical direction. Further, the plane mirror 70 may be provided, and as described in the second and fifth embodiments, the radiator 8, the reflecting mirror 9, and the plane mirror 70 may be configured to rotate with respect to the gyrotron device 6. Good. Thus, by combining the change of the irradiation position of the microwave by the second rotating device 77 and the rotational movement of the irradiation position by the first rotating device 22, the gyrotron device 6 can be moved in both the axial direction and the circumferential direction. A certain irradiation target 4 can be efficiently irradiated with microwaves.

Embodiment 7 A concrete stripping apparatus according to a seventh embodiment of the present invention will be described with reference to FIGS. 14 (a) and 14 (b). As shown in FIG. 15, the gyrotron device 6 is a gyrotron 60 that generates high-power microwaves by the interaction between an electron beam and a high-frequency electromagnetic field.
And a magnetic field generator 61 for generating a magnetic field necessary for causing the interaction between the electron beam and the high frequency electromagnetic field. As the magnetic field generator 61, there are cases where the permanent magnet 40 is used and cases where the electromagnet 41 such as a superconducting electromagnet or a normal conducting magnet is used. In the gyrotron device 6,
At least wiring to the gyrotron 60 and a cooling water hose are required. However, when the electromagnet 41 is used as the magnetic field generation device 61, as shown in FIG. 14B, the power supply lines 32a and 32b from the excitation power source are further supplied. And the electromagnet cooling water hoses 33a, b are connected, and it is not possible to rotate or move the gyrotron device 6 in such a state that many power supply lines and cooling water hoses are connected. difficult. Therefore, as shown in FIG. 14A, if the permanent magnet 40 is adopted as the magnetic field generator 61 of the gyrotron device 6, the magnetic field generator 6 as in the case of using the electromagnet 41 is used.
The wiring to 1 and the hose for cooling water are unnecessary, and rotation and movement of the gyrotron device 6 become easy. Either one of the cavity resonator of the gyrotron 60 and the electron gun,
Alternatively, when it is necessary to finely adjust the magnetic flux densities in both, an auxiliary electromagnet may be wound around a necessary portion. In that case, a power supply line for supplying a current to the auxiliary electromagnet is required, but a thin line is sufficient because it is not necessary to supply a large current, and it does not cause a great obstacle when the gyrotron device 6 rotates or moves.

In each of the above-described embodiments, the case where the gyrotron device 6 and the radiator 8 are directly coupled to each other has been described, but the waveguide 7 is provided between them as in the prior art example shown in FIG. The present invention can be applied to the intervening device, for example, by providing the first rotating device 22 similar to that shown in FIG. 1 between the crane 12 and the platform on which the gyrotron device 6 shown in FIG. 30 is placed. Furthermore, the radiator 8 and the reflecting mirror 9
Even when using a gyrotron device 6 of a type in which microwaves are focused and emitted in a direction intersecting the axis 6a of the gyrotron device, the gyrotron device 6 can be rotated about the axis 6a. Therefore, the present invention can be applied.

Embodiment 8 FIG. FIG. 16 is a diagram showing the structure of a concrete stripping apparatus according to Embodiment 8 of the present invention. In the figure, the same reference numerals as those in the conventional and the above-mentioned respective embodiments indicate the same or corresponding portions, and thus the description thereof will be omitted. Reference numeral 101 denotes a temperature measuring device such as an infrared radiation thermometer, which measures the temperature of the concrete in the portion that appears from the back after the surface of the concrete body 4 is peeled off or in the peripheral portion of the microwave irradiation portion. Like above-mentioned,
Moisture must be present in the concrete to remove the concrete, but when the temperature of the concrete becomes high, the water may evaporate and it becomes difficult to remove the concrete. The temperature is set at about 120 ° C. . Of course, it means that the moisture evaporates even at a temperature lower than this, but at a temperature higher than this, it means that the moisture in the concrete is insufficient due to the evaporation to such an extent that the peeling is affected.

According to the present embodiment, the temperature measuring device 10
1 can be used to know the temperature of the concrete in the part that appears from the back after the surface of the concrete body 4 is peeled off, or in the vicinity of the microwave irradiation location, and the water content in the concrete is insufficient due to evaporation to the extent that it affects the peeling. When it is about to exceed the temperature, the microwave irradiation position is moved to another location, the output power of the gyrotron 6 is reduced, or the output is stopped to evaporate the moisture in the concrete. It becomes possible to suppress. Therefore, the concrete wall can be surely peeled off any number of times, so that it is possible to provide a highly reliable concrete peeling device capable of peeling off and removing all necessary portions.

Embodiment 9 17 and 18 are views showing the configuration of a concrete stripping apparatus according to Embodiment 9 of the present invention. However, FIG. 18 shows a state in which FIG. 17 is looked up from below. In the figure, the same reference numerals as those in the conventional and the above-mentioned respective embodiments indicate the same or corresponding portions, and thus the description thereof will be omitted. In the concrete peeling apparatus of the present embodiment, a plurality of concrete peeling mechanisms (two in the figure) including the gyrotron device 6, the radiator 8 and the reflecting mirror 9 are used. Reference numeral 115 is a suspension plate for holding these concrete peeling mechanisms.
The plurality of gyrotrons may be connected to one power supply device in parallel, or may be independently connected to the plurality of power supply devices.

As described in the eighth embodiment, when the temperature of the concrete is 120 ° C. or higher, the water content in the concrete is insufficient to the extent that the peeling is affected. Temperature measuring device 10
By using 1, it is possible to know whether or not the temperature of the concrete has exceeded 120 ° C., so that it is possible to identify the location near the surface of the concrete body 4 which is considered to be deficient in water. Since the microwave decays exponentially after entering the concrete wall 4, it is only the portion from the surface to a certain depth that is heated by the microwave. Therefore, it is considered that the part of the concrete wall 4 where the water is evaporated and insufficient is from the surface to a certain depth, and the water is still left in the part further from there. It is possible to cause peeling again if microwaves having a power density required to cause peeling can be reached to this portion by utilizing this water content. The power density of the microwave incident on the concrete body 4 is assumed to be exponentially attenuated as shown in FIG. The attenuation factor is determined by the relative permittivity of the concrete, the dielectric loss tangent, and the frequency of the microwave. The relative permittivity and the dielectric loss tangent depend on the mixing ratio of the concrete and the water content at that time. For example, in FIG.
It is assumed that the water is insufficient in the portion from the surface (x = 0) to x = x1 and the water necessary for causing peeling remains in the portion deeper than the position of x = x1. x = x1
Assuming that the power density at x = x1 required to cause peeling due to the moisture left behind the position is P1, the power density P0 required on the surface of the concrete body 4 is obtained from the attenuation rate. In order to obtain this power density, for example, as shown in FIG. 18, microwaves emitted from a plurality of gyrotron devices 6 may be concentrated at one location so that the power density P0 can be obtained.

By doing so, even if the water near the surface of the concrete body 4 evaporates and affects the peeling, it is possible to cause the peeling again by utilizing the water remaining in the back. All parts of the wall that should be peeled off can be removed, improving reliability.
Further, since a plurality of gyrotron devices 6 are used, it is possible to adopt an operating method in which a plurality of locations on a concrete wall surface are simultaneously irradiated with microwaves, and it is possible to provide a concrete stripping device with good work efficiency. .

Embodiment 10. FIG. 20 is a diagram showing the structure of the concrete stripping apparatus according to Embodiment 10 of the present invention. In the figure, the same reference numerals as those in the conventional and the above-mentioned respective embodiments indicate the same or corresponding portions, and thus the description thereof will be omitted. Reference numeral 102 denotes a device that acquires information about the shape or color of the surface of the concrete body 4, and is, for example, a CCD camera.

If the peeling progresses and the reinforcing bars in the concrete 4 are exposed, the microwaves may be reflected by the reinforcing bars or discharge may occur, which may hinder the peeling work. Therefore, as in this embodiment, the concrete body 4
If information about the shape and color of the surface is acquired, it can be seen that the reinforcing bar is exposed.In that case, it is possible to move the microwave irradiation position or stop the operation of the gyrotron. It will be possible. Also,
If a device for irradiating laser light is also used, it is possible to start the work of cutting the reinforcing bar. Further, it is possible to distinguish the already peeled portion and the still portion on the surface of the concrete wall 4. As described in the eighth embodiment, it is desirable to peel the concrete while keeping the temperature of the concrete at 120 ° C. or lower. Therefore, work procedures include absorption of microwaves with a relatively low power density such as the part that appears from the back after the concrete surface is peeled off, concrete around the microwave irradiation location, and heat from the peeled part. It is conceivable that the peeling of another portion is repeated until the temperature of the portion whose temperature has risen due to conduction decreases, and the peeling of the portion is repeated again after the temperature has dropped. For that purpose, it is necessary to distinguish the exfoliated part and the unexposed part of the concrete surface. This is possible with a device 102 that obtains information about the shape and color of the concrete surface, such as a CCD camera.

By doing so, it is possible to provide a highly reliable concrete peeling device which does not cause any trouble even if the reinforcing bar is exposed, and also to the portion where the surface has already been peeled off by irradiation with microwaves. Since it is possible to proceed with the work while not irradiating the microwave until the temperature of the part decreases, it is possible to provide a highly reliable concrete removing device capable of performing the removing as many times as possible.
However, when the CCD camera 102 is used in a radiation environment, it is necessary to sufficiently shield the lens and use a radiation resistant lens.

Eleventh Embodiment Further, as shown in FIG. 21, a hole 1 having a size that does not allow microwaves to enter the reflecting mirror 9.
20 may be opened, and the laser light irradiation device 121 may be used to emit laser light from there. If the optical path 122 of the laser light is made to overlap with the propagation path of the microwave, the portion of the concrete wall 4 irradiated with the laser light is irradiated with the microwave without irradiating the concrete wall 4 with the microwave. Since it corresponds to the position
By confirming with the D camera 102, the microwave irradiation position can be known in advance. By doing so, the irradiation position of the microwave on the concrete wall 4 can be known before the irradiation of the microwave, so that the microwave can be surely irradiated to the desired position. However, as in the case of the tenth embodiment, it is necessary to perform sufficient shielding when using a CCD camera in a radiation environment and to use a radiation resistant lens as the lens.

Twelfth Embodiment 22: is a figure which shows the structure of the concrete peeling apparatus by Embodiment 12 of this invention. In the figure, the same reference numerals as those in the conventional and the above-mentioned respective embodiments indicate the same or corresponding portions, and thus the description thereof will be omitted. Reference numeral 103 is an apparatus for measuring the distance to the surface of the concrete body 4 using infrared rays, for example. In order to efficiently separate the concrete wall, the microwave focus needs to be located at an optimum position with respect to the surface of the concrete body 4. Since the surface of the concrete body 4 moves away from the concrete peeling device as the peeling progresses, the distance to the surface of the concrete body 4 is measured using the distance measuring device 103, and the concrete peeling device is moved using the crane 12, for example. By moving the microwave focal point, the microwave focal point can always be positioned at an optimum location, and concrete can be efficiently peeled off, and a highly reliable concrete peeling device can be provided. Can be provided.

Thirteenth Embodiment In the twelfth embodiment, in order to move the focus of microwaves, the case where the crane 12 is used to move the entire concrete peeling apparatus has been described. However, as shown in FIG. 23, the reflecting mirror 105 having a variable focal length is used. Good. The reflecting mirror 105 is divided as shown in the front view of FIG. 23 and 24, 1
Reference numerals 06a to 06p are slightly curved reflecting mirror pieces, and each of them is a support 1 including drive mechanisms 107a to 107p (only 107a to 107d are shown in the drawing) as shown in FIG.
08a-p (however, only 108a-d are shown in the drawing) and a drive mechanism 1 for further driving these supports.
09 independently held. Drive mechanism 107a
By -p and 109, it is possible to change the curvature of the entire reflecting mirror 105 by changing the distance of each reflecting mirror piece 106a-p to the radiator 8 and the angle with respect to the radiator 8. Since the focal length is determined by the curvature of the entire reflecting mirror 105, it is possible to control the focal length with such a structure. By doing so, the focus position of the microwave can be moved, so that the same effect as when using the crane 12 shown in the twelfth embodiment can be obtained, and the concrete can be efficiently separated. It is possible to provide a highly reliable concrete peeling device.

Incidentally, the reflecting mirror 105 shown in the present embodiment.
Is divided into 16, but if the number of divisions is further increased, the focus position can be controlled more accurately, and conversely, if the number of divisions is reduced, the cost is reduced.

Embodiment 14 FIG. Further, a configuration for moving the focus of the microwave may be as shown in FIG. In the figure, 9a to 9d (where 9d is on the opposite side of 9b and not shown) are a plurality of reflecting mirrors having different focal lengths. These are fixed to the reflecting mirror rotating shaft 111 and are rotated by the reflecting mirror rotating device 110, and the reflecting mirrors can position the focal point at an appropriate position among the plurality of reflecting mirrors 9a to 9d. Can be used by facing the radiator 8. By doing so, the focus position of the microwave with respect to the surface of the concrete body 4 can be moved, so that the same effect as that of the twelfth and thirteenth embodiments can be obtained, and the concrete can be efficiently peeled off. It is possible to provide a highly reliable concrete peeling device. It should be noted that in this embodiment, when the focal length is different,
Although the individual reflecting mirrors 9a to 9d are used, if more reflecting mirrors are used, it becomes possible to control the position of the focal point with higher accuracy, and conversely, if the number is reduced, the cost is reduced. Further, the crane described in Embodiment 12 may be used together.

Embodiment 15 FIG. Embodiments 8 to 1 above
4 shows that one type of temperature measuring device 101, one type of CCD camera 102, and one type of distance measuring device 103 are used as means for acquiring information about the concrete wall 4 that is the object to be irradiated, but these are not necessarily 1 The type does not have to be used, and a means for acquiring information regarding a plurality of concrete walls may be used as necessary. By doing so, more information about the concrete wall can be acquired at the same time, so that a more reliable concrete peeling device can be provided.

[0049]

As described above, according to the concrete stripping apparatus of the first aspect of the present invention, a gyrotron device for generating microwaves and an output terminal of the gyrotron device provided at the output end of the gyrotron device are provided. And a radiator that radiates microwaves that radiate microwaves that are provided facing the radiator and that are reflected and focused in a direction intersecting with the axis of the gyrotron device, and irradiate the irradiation target. And a first rotating means for rotating at least the radiator and the reflecting mirror around an axis parallel to the axis of the gyrotron device while maintaining the positional relationship between them. The microwave irradiation position on the concrete wall can be moved in the circumferential direction, and if the rotation axis and the central axis of the irradiation target are aligned, the irradiation from the reflector will be performed. Irradiation intensity of microwaves in the irradiation point without changing the focal length of the filtering can be kept constant, it is possible to peel off the concrete is efficient irradiation object.

According to the concrete stripping apparatus of the second aspect of the present invention, the gyrotron device is installed such that its output end is located below, and the radiator and the reflecting mirror are located below the gyrotron device. As a result, the support structure for rotating it becomes simple.

According to the concrete stripping apparatus of the third aspect of the present invention, since it is provided with the plane mirror which is disposed in the propagation path of the microwave reflected by the reflecting mirror and bends the propagation path of the reflected microwave. It is possible to irradiate microwaves on an irradiation target in the axial direction of the gyrotron device, such as a ceiling or floor.

In the concrete stripping apparatus according to the fourth aspect of the present invention, since the plane mirror is constructed so that it can be taken in and out of the microwave propagation path, the plane mirror can be moved in and out in the radial and axial directions of the gyrotron device. Microwaves can be applied to the irradiation target in both directions, and microwaves can be applied over a wide range by driving in combination with the first rotating means.

According to the concrete stripping apparatus of the fifth invention, an axis intersecting with the axis of the gyrotron device while maintaining the positional relationship between the gyrotron device, the radiator, and the reflecting mirror. Since the second rotating means for rotating around the gyrotron device is provided, by driving the first rotating means and the second rotating means in combination, the irradiated object in both the radial direction and the axial direction of the gyrotron device is driven. The microwave can be radiated over a wide area.

According to the concrete stripping apparatus of the sixth invention, the gyrotron device comprises a gyrotron for generating a microwave and a magnetic field generator for generating a magnetic field necessary for generating the microwave, and the magnetic field generator is provided. Since the device is a permanent magnet or a combination of a permanent magnet and an auxiliary electromagnet, the permanent magnet does not require wiring or a hose for cooling water, which facilitates rotation and movement of the gyrotron device.

According to the concrete stripping apparatus of the seventh aspect of the present invention, the temperature of the peripheral portion of the microwave irradiation position on the irradiated body, the shape or color of the irradiated body, the distance to the irradiated body, and the like are irradiated. Since a means for acquiring information on the state of the body is provided and the operating conditions are controlled based on the obtained information, a highly reliable concrete peeling device can be obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a concrete peeling device according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of the radiator and the reflector of the concrete stripping device according to the first embodiment of the present invention.

FIG. 3 is a diagram for explaining the operation of the concrete stripping apparatus according to Embodiment 1 of the present invention.

FIG. 4 is a configuration diagram showing another configuration example of the concrete stripping apparatus according to the first embodiment of the present invention.

FIG. 5 is a configuration diagram showing a concrete stripping apparatus according to Embodiment 1 of the present invention.

FIG. 6 is a perspective view showing an example of an obliquely cut radiator according to the first embodiment of the present invention.

FIG. 7 is a perspective view showing an example of a radiator cut in a spiral shape according to the first embodiment of the present invention.

FIG. 8 is a configuration diagram showing a main part of a concrete peeling device according to a second embodiment of the present invention.

FIG. 9 is a configuration diagram showing a concrete peeling apparatus according to a third embodiment of the present invention.

FIG. 10 is a configuration diagram showing a concrete peeling device according to a fourth embodiment of the present invention.

FIG. 11 is a configuration diagram showing a main part of a concrete peeling device according to a fifth embodiment of the present invention.

FIG. 12 is a configuration diagram showing a concrete peeling device according to a sixth embodiment of the present invention.

FIG. 13 is a configuration diagram showing a concrete peeling apparatus according to Embodiment 6 of the present invention when viewed from the right side of FIG.

FIG. 14 is a diagram illustrating a concrete peeling device according to a seventh embodiment of the present invention.

FIG. 15 is a configuration diagram of a gyrotron device according to a seventh embodiment of the present invention.

FIG. 16 is a configuration diagram showing a concrete peeling device according to an eighth embodiment of the present invention.

FIG. 17 is a configuration diagram showing a concrete peeling device according to a ninth embodiment of the present invention.

FIG. 18 is a plan view showing a state where the concrete peeling apparatus of FIG. 17 is looked up from below.

FIG. 19 is a graph illustrating attenuation of microwave power density in concrete.

FIG. 20 is a configuration diagram showing a concrete peeling device according to a tenth embodiment of the present invention.

FIG. 21 is a configuration diagram showing a concrete peeling device according to an eleventh embodiment of the present invention.

FIG. 22 is a configuration diagram showing a concrete peeling device according to a twelfth embodiment of the present invention.

FIG. 23 is a configuration diagram showing a concrete peeling device according to a thirteenth embodiment of the present invention.

FIG. 24 is a front view showing the structure of a reflecting mirror according to Embodiment 13 of the present invention.

FIG. 25 is a configuration diagram showing a concrete peeling device according to a fourteenth embodiment of the present invention.

FIG. 26 is a diagram showing a state after removing the reactor internals of the pressurized water reactor.

FIG. 27 is a view showing a state after removing the reactor internals of the boiling water reactor.

FIG. 28 is a graph showing the penetration depth of radioactivity into a concrete surface.

FIG. 29 is an overall perspective view of a conventional concrete surface layer peeling device.

FIG. 30 is a configuration diagram showing a prior concrete surface layer peeling apparatus using a gyrotron.

[Explanation of symbols] 1 magnetron, 2 waveguide, 3 electromagnetic horn,
4 concrete body, 5 vacuum hose, 6 gyrotron device, 6a axis of gyrotron device,
7 Waveguide, 8 Radiator, 9 Reflector, 11 Cooler, 12 Crane, 13 Gyrotron Power Supply, 14 Remote Control Device, 21 Reflector Support, 2
2 first rotation device, 22a drive device, 22b,
c gear, 23 suspension beam, 24, 24a, b suspension rod, 25 suspension tool, 26 rotating shaft, 27 weight, 30a, b gyrotron power supply line, 31
a, b gyrotron cooling water hose, 32a, b
Electromagnetic power supply line, 33a, b Electromagnetic cooling water hose, 40 permanent magnet, 41 electromagnet, 60 gyrotron, 61 magnetic field generator, 62 coupling part,
70 plane mirror, 71 plane mirror support, 72 drive device, 75 rotating shaft, 77 second rotating device, 77a
Drive device, 77b gear, 101 temperature measuring device, 102 CCD camera, 103 distance measuring device, 105 variable focal length reflecting mirror, 106a-p
Reflector piece, 107a-p Reflector piece drive mechanism, 1
08a-p support tool, 109 drive mechanism, 110 reflecting mirror rotating device, 111 reflecting mirror rotating shaft, 115 hanging plate, 120 hole, 121 laser light irradiation device,
122 Optical path of laser light.

Claims (10)

[Claims] 1. A gyrotron device for generating microwaves, a radiator provided at an output end of the gyrotron device for radiating microwaves output from the gyrotron device, and a radiator provided opposite to the radiator. A reflecting mirror for reflecting and focusing the microwave radiated from the radiator in a direction intersecting with the axis of the gyrotron device, and irradiating the irradiated object with at least the radiator and the reflecting mirror. A concrete stripping device, comprising: a first rotating means for rotating about an axis parallel to the axis of the gyrotron device while maintaining the relationship. 2. The gyrotron device according to claim 1, wherein the gyrotron device is installed such that its output end is located below, and the radiator and the reflecting mirror are located below the gyrotron device. Concrete stripping equipment. 3. The plane mirror according to claim 1, further comprising a plane mirror arranged in a propagation path of the microwave reflected by the reflecting mirror and bending the propagation path of the reflected microwave. Concrete stripping equipment. 4. The concrete stripping apparatus according to claim 3, wherein the plane mirror is configured to be able to be put in and taken out of a microwave propagation path. 5. A gyrotron device, a radiator, and second rotating means for rotating the gyrotron device around an axis intersecting with the axis of the gyrotron device while maintaining the positional relationship between the radiator and the reflector. Claim 1 characterized by the above-mentioned.
Alternatively, the concrete peeling apparatus according to the item 2. 6. The gyrotron device includes a gyrotron that generates a microwave and a magnetic field generator that generates a magnetic field necessary for generating the microwave, and the magnetic field generator includes a permanent magnet or a permanent magnet and an auxiliary electromagnet. The concrete stripping apparatus according to any one of claims 1 to 5, wherein the concrete stripping apparatus is a combination thereof. 7. The concrete stripping apparatus according to claim 1, further comprising means for acquiring information on the state of the object to be irradiated, and controlling the operating conditions based on the obtained information. 8. The information acquisition means of the irradiated body is a means for measuring a temperature of a peripheral area of a microwave irradiation position in the irradiated body, and controls so that the temperature of the peripheral area does not exceed a predetermined value. The concrete stripping apparatus according to claim 7, wherein 9. The concrete peeling apparatus according to claim 7, wherein the information acquisition means of the irradiated body is a means for acquiring information on the shape or color of the irradiated body. 10. The irradiation object information acquisition means is a means for measuring the distance to the irradiation object, and controlling the focal position of the microwave irradiating the irradiation object according to the measurement distance. The concrete stripping apparatus according to claim 7, which is characterized in that.