JPH06331611A - Automatic flaw detector for ring-shaped structures - Google Patents

Abstract

(57) [Summary] [Object] To provide an automatic flaw detector capable of safely performing defect inspection work of a ring-shaped structure without requiring much labor and improving reliability of data of defect position. [Structure] The kiln tire automatic flaw detector is equipped with a traveling carriage 5
And an ultrasonic flaw detector 6 mounted on the traveling carriage 5,
The control device controls the traveling vehicle 5. The traveling carriage 5 has drive magnet rollers 13a and 13b that magnetically attract to the outer peripheral surface of the kiln tire and travels on the outer peripheral surface in the circumferential direction, side rollers 20a and 20b that contact the side surfaces of the kiln tire, and drive motors 14a and 14.
b and are provided. Further, the ultrasonic flaw detector 6 has
Drive motor 47 for moving in the width direction of the kiln tire
Are connected. Further, the traveling carriage 5 is provided with a defect marking mechanism 53, a contact medium supply mechanism, a cleaning air nozzle 81, and the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic flaw detector capable of automatically performing defect inspection on a ring-shaped structure such as a kiln tire of a rotary kiln for a cement plant.

[0002]

2. Description of the Related Art As a typical ring-shaped structure,
Rotary kiln for cement plant (rotary firing furnace)
There are kiln tires. This rotary kiln is a furnace body in which a large iron cylinder is installed in a horizontal direction with a slight inclination, and the cement raw material is put in from the upper part, and while the rotary kiln is rotated, the cement raw material is moved and heated to perform firing. It is a device.

In this apparatus, the kiln tire is a huge steel ring having a diameter of 7 m, a width of 1 m and a total weight of 100 t, for supporting the rotary kiln and rotating the rotary kiln in contact with the driving rim. In contrast, it is installed in 3 to 4 places. Kiln tires are always used under heavy loads and high heat loads, and are used in the harsh environment of being exposed to wind and rain, but if this kiln tire is damaged, it will stop the rotary kiln,
Eventually, the operation of the entire cement plant will be stopped. Therefore, the inspection work of the kiln tire is carried out in accordance with the regular inspection period of the rotary kiln once or twice a year. In this inspection work, a large-scale scaffold is constructed and the entire circumference of all the kiln tires is manually prepared by the operator. Ultrasonic flaw detection work is performed on a surface to find a defective portion.

[0004]

However, in the conventional inspection work of the kiln tire, not only a great deal of labor is required for the work of constructing a large-scale scaffold as a pre-stage of the inspection work, but also the work is required. Since this is so-called work at a high place where the worker rides on a scaffold, there is a problem in that the work is dangerous. In addition, when a defect is found, the operator uses a method to write it down by handwriting.However, this method has a limit to the reliability of the data, so that later defect repair work can be performed smoothly. There was concern that there would be no. Note that this problem is not limited to kiln tires, and is a problem common to other large-scale ring-shaped structures.

The present invention has been made in order to solve the above-mentioned problems, and the inspection work of the ring-shaped structure can be performed safely without requiring much labor, and
It is an object of the present invention to provide an automatic flaw detection system for a ring-shaped structure that can improve the reliability of data on a defect position.

[0006]

In order to achieve the above object, the automatic flaw detector for a ring-shaped structure according to claim 1 has a mounting means for mounting the ring-shaped structure by magnetic attraction. And a traveling carriage configured to be capable of traveling in the circumferential direction on the outer peripheral surface of the ring-shaped structure, and an ultrasonic flaw detection device mounted on the traveling carriage for detecting defects on the outer peripheral surface of the ring-shaped structure. A control device for controlling the traveling of the traveling vehicle from a position separated from the traveling vehicle is provided.

Further, in the automatic flaw detection system for a ring-shaped structure according to a second aspect of the present invention, the traveling carriage magnetically attracts the outer peripheral surface of the ring-shaped structure to the frame and travels on the outer peripheral surface. A drive magnet roller that constitutes the mounting means, a side roller that contacts the side surface of the ring-shaped structure to hold the traveling carriage, and a drive mechanism that rotationally drives the drive magnet roller are provided. It is characterized by being present.

In the automatic flaw detector for a ring-shaped structure according to a third aspect of the present invention, the ultrasonic flaw detector is mounted on the traveling carriage so as to be movable in the width direction of the ring-shaped structure. In addition, a drive mechanism for moving the ultrasonic flaw detector in the width direction is provided.

Further, in the automatic flaw detector for a ring-shaped structure according to a fourth aspect of the present invention, the flaw is caused by causing the traveling carriage to spray paint onto a defect position on the outer peripheral surface of the ring-shaped structure detected by the ultrasonic flaw detector. It is characterized by having a marking mechanism.

According to a fifth aspect of the present invention, there is provided an automatic flaw detector for a ring-shaped structure in the space between the ultrasonic probe of the ultrasonic flaw detector and the outer peripheral surface of the ring-shaped structure. It is characterized by comprising a couplant supply mechanism for supplying a couplant.

Further, in the automatic flaw detection system for a ring-shaped structure according to a sixth aspect of the present invention, the frame of the traveling carriage is configured as a front frame and a rear frame separately, and these front and rear frames are respectively provided. The drive magnet roller is provided, and the front and rear frames are
It is characterized in that the ring-shaped structures are rotatably connected to each other by a shaft located along the tangential direction of the ring-shaped structure.

According to a seventh aspect of the present invention, in an automatic flaw detection system for a ring-shaped structure, the ultrasonic flaw detection system applies a force to an ultrasonic probe of the ultrasonic flaw detection system in the direction of the ring-shaped structure. The ultrasonic probe is provided with a guide plate around the ultrasonic probe.

An automatic flaw detection system for a ring-shaped structure according to claim 8 is installed on the traveling carriage in front of the ultrasonic flaw detection system, and air is blown toward the outer peripheral surface of the ring-shaped structure. It is characterized in that it is provided with a cleaning air nozzle for ejecting.

[0014]

According to the automatic flaw detector for a ring-shaped structure according to any one of claims 1 to 3, the traveling carriage having the drive magnet roller, the side roller and the drive mechanism is controlled by the control device. Automatically runs in the circumferential direction on the outer peripheral surface. Further, since the ultrasonic flaw detector mounted on the traveling carriage is movable in the width direction of the ring-shaped structure, if the movement of the traveling carriage and the movement of the ultrasonic flaw detector are combined, the ultrasonic flaw detection is performed. The device can move all over the outer peripheral surface of the ring-shaped structure to reliably detect the defect position on the outer peripheral surface. Therefore, the operator can automatically perform the defect inspection work by operating the control device and operating the traveling carriage and the ultrasonic flaw detector.

According to the automatic flaw detection system for a ring-shaped structure according to the fourth aspect, the defect marking mechanism provided on the traveling carriage is used to locate the defect on the outer peripheral surface of the ring-shaped structure detected by the ultrasonic flaw detection device. Since the paint is sprayed, the defect position can be easily identified after the defect inspection is completed.

According to the automatic flaw detector for a ring-shaped structure of the fifth aspect, the ultrasonic probe of the ultrasonic flaw detector and the outer peripheral surface of the ring-shaped structure are provided by the couplant supply mechanism provided in the traveling carriage. Since the contact medium necessary for ultrasonic flaw detection is supplied to the space between and, it is not necessary to supply the contact medium from outside the traveling carriage, and the ultrasonic flaw detector can smoothly perform ultrasonic flaw detection. it can.

According to the automatic flaw detection system for a ring-shaped structure of the sixth aspect, the frames of the traveling carriages are separate bodies, and each frame is composed of a front frame and a rear frame connected by a shaft. Even if there is an uneven portion on the outer peripheral surface of the structure, and the height of each drive magnet roller of the traveling carriage changes due to the uneven portion, the frames are relatively moved around the axis. By rotating the drive magnet roller to the right, each drive magnet roller can surely contact the outer peripheral surface of the ring-shaped structure.

According to the automatic flaw detector for a ring-shaped structure of claim 7, the ultrasonic flaw detector includes a biasing device for biasing the ultrasonic probe and a front to rear portion of the ultrasonic probe. Since the ultrasonic probe is pressed toward the ring-shaped structure by the urging device, the ultrasonic probe is irrespective of the unevenness of the outer peripheral surface of the ring-shaped structure. Thus, the ring-shaped structure can always be smoothly moved along the outer peripheral surface thereof.

According to the automatic flaw detector for a ring-shaped structure of claim 8, air is ejected toward the outer peripheral surface of the ring-shaped structure in front of the ultrasonic flaw detector by the cleaning air nozzle provided in the traveling carriage. Therefore, the ejected air scatters foreign matter such as dust adhering to the outer peripheral surface of the ring-shaped structure, so that only defects on the outer peripheral surface of the ring-shaped structure can be reliably detected.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a kiln tire of a rotary kiln will be described in detail below with reference to the drawings. FIG. 8 is a view showing a state in which a kiln tire automatic flaw detector is attached to a rotary kiln, and reference numeral 1
Is a rotary kiln installed on the ground 2, 3 is a kiln tire (ring-shaped structure), and 4 is a kiln tire automatic flaw detection device (automatic flaw detection device for ring-shaped structure) mounted on the rotary kiln. This kiln tire automatic flaw detection device 4 is roughly configured by a traveling carriage 5 and an ultrasonic flaw detection device 6 shown in FIGS. 1 to 3, a control device 7 shown in FIG. 6, and a cable 8 connecting them. In addition,
The traveling carriage 5 is mounted on the kiln tire 3 for traveling on the kiln tire 3, and the ultrasonic flaw detector 6 is mounted on the traveling carriage 5 for detecting a defect on the outer peripheral surface of the kiln tire 3. The device 7 includes the traveling carriage 5
This is for controlling the operation of the traveling vehicle 5 from a position distant from.

First, the structure of the traveling vehicle will be described with reference to FIGS. The traveling carriage 5 is configured such that its frame is divided into a front frame 9 and a rear frame 10, and these frames 9 and 10 are formed by the kiln tire 3
Traveling body joint 1 having an axis along the circumferential direction (tangential direction) of the
They are connected by 1 (shaft) and are configured to be rotatable relative to each other with the traveling body joint 11 as a central axis.

As shown in FIG. 1, drive magnet rollers 13a, 13a are rotatably supported by drive shafts 12a supported by the frame 9 on both sides of the front portion of the front frame 9. The drive magnet roller 13a has a magnetic force, and when it is placed on the kiln tire 3, it has a function of being attracted to the kiln tire 3 by the magnetic force and securely holding the traveling carriage 5 on the kiln tire 3 as a whole. is there. A drive motor 14a (drive mechanism) is fixed to the front portion of the front frame 9, and the rotational force of the drive motor 14a is transmitted to the drive shaft 12a via a power transmission mechanism 15a (drive mechanism). The drive magnet rollers 13a, 13a are rotationally driven.

Side arms 16a, 16a are movably supported on both sides of the front portion of the front frame 9 in the width direction of the kiln tire 3.
Roller arms 18a, 18a are rotatably supported around bolts 17a, 17a supported by 6a. A shaft 19 is formed at the lower end of the roller arm 18a, and a side roller 20a is rotatably supported on the shaft 19. The side roller 20a constantly contacts the side surface of the kiln tire 3 and rolls on the side surface as the traveling vehicle 5 travels.
The function of reliably holding the traveling direction of the vehicle is parallel to the circumferential direction of the kiln tire 3.

As shown in FIG. 4, the side arm 16a is fixed to a shaft 22 of a side arm clamp cylinder 21a fixed to the front frame 9, and the shaft 22 reciprocates. The side arm 16a can be expanded and contracted in the width direction of the kiln tire 3. Further, the angle between the axis of the roller arm 18a and the axis of the side arm 16a can be changed by releasing and tightening the bolts 17a and nuts. Therefore, with these configurations, even if the width and taper shape of the kiln tire 3 to be inspected are different, the side roller 20a can be adjusted so as to always contact the side surface of the kiln tire 3.

On the side of the power transmission mechanism 15a of the front frame 9, a traveling position detection mechanism 23 is provided. As shown in FIG. 5, in the traveling position detection mechanism 23, the roller support member 25 is attached to the shaft 24 fixed to the front frame 9 and the shaft 2 is rotated.
A position detection roller 26 is rotatably supported by a shaft fixed to the roller support member 25. The position detection roller 26 is
The roller 27 is pressed by the spring 27 in the direction of the kiln tire 3, so that the roller support member 25 is always in contact with the outer peripheral surface of the kiln tire 3 and rolls along the outer peripheral surface as the traveling carriage 5 travels. . The rotation speed of the position detection roller 26 is transmitted to the traveling position detector 29 fixed to the front frame 9 via the rotation transmission mechanism 28, and the traveling position detector 29 has the above rotation speed. Based on this, the present position of the traveling carriage 5 on the kiln tire 3 can be detected. When the traveling position detection mechanism 23 detects the current position of the traveling carriage 5, a reference position detection sensor (not shown) installed on the traveling carriage 5 is embedded in the side surface of the kiln tire 3 at the inspection start stage. A reference position magnet (not shown) is detected, and the position is used as the origin of coordinates, and the current position on the kiln tire 3 of the traveling vehicle 5 is detected by the deviation from the position.

A guide rail 30 (details of which will be described later) extending in the width direction of the kiln tire 3 is fixed to the rear portion of the front frame 9.

Next, on both sides of the rear frame 10, drive magnet rollers 13b, 13b are rotatably supported. About this drive magnet roller 13b,
The supporting structure and driving means are the same as those on the front frame side described above, and the rotational force of the driving motor 14b (driving mechanism) is transmitted to the driving shaft 12b via the power transmission mechanism 15b (driving mechanism), It is designed to be rotated.

On both sides of the rear frame 10, side arms 16b are provided with side arm clamp cylinders 21b.
Is movably supported in the width direction of the kiln tire 3, and the roller arm 18b is rotatably supported by the bolt 17b with respect to the side arm 16b. A side roller 20b is rotatably supported at the lower end of the roller arm 18b. These supporting structures are also the same as those on the front frame side described above, and the side roller 20b also works together with the side roller 20a on the front frame side to allow the kiln tire 3 to operate.
By constantly contacting the side surface of the kiln tire 3, the traveling direction of the traveling carriage 5 is reliably maintained parallel to the circumferential direction of the kiln tire 3.

Next, the ultrasonic flaw detector will be described in detail. The ultrasonic flaw detector 6 is mounted on the traveling vehicle 5 and is for moving on the outer peripheral surface of the kiln tire 3 to detect a defect on the outer peripheral surface. In FIG. 3, reference numeral 31 is a casing, and a supporting member 32 is fixed to the casing 31, and the supporting member 32 has two guide rails 30 sandwiched between the front and rear sides and two upper and lower sides in total. The eight shafts 33, 33 ... Are fixed, and the rollers 34, 34 ... Are rotatably supported about the shafts 33, 33. This roller 34 is the roller 3
4 side plates 35, 35 are provided on both side surfaces of the main body, and when the ultrasonic flaw detector is installed on the guide rail 30, both side plates 35, 35 sandwich the guide rail 30 and the ultrasonic flaw detector 6 is configured so that it cannot be separated from the guide rail 30.

An air cylinder 36 is fixed to the casing 31, and an ultrasonic probe module 38 is attached to the tip of a rod 37 protruding from the main body of the air cylinder 36. The ultrasonic probe module 38 includes the module main body 38a, the ultrasonic probe 39 attached to the main body 38a, and the guide plate 4.
It is composed of 0s. Here, the ultrasonic probe 39
Is for detecting reflected waves of ultrasonic waves emitted to detect defects in the kiln tire 3, and the guide plate 40 is for guiding the ultrasonic probe 39 along the outer peripheral surface of the kiln tire 3. A cable bear 41 is connected to the ultrasonic probe 39, and an ultrasonic flaw detector 42 (details of which will be described later) is connected to the other end of the cable bear 41.

Further, the rod 37 is used for the air cylinder 3
A spring 44 (biasing device) interposed between the main body 6 and a stopper 43 provided at the tip of the rod 37 is constantly biased so as to project in the direction of the kiln tire 3. Therefore, the ultrasonic probe module 38 attached to the rod 37 is arranged at a position very close to the outer peripheral surface of the kiln tire 3. on the other hand,
A first parallel link 45a is rotatably installed between the rod 37 and the support member 32 via pins 46, 46, and further, the rod 37 and the ultrasonic probe module. 38 to the second parallel link 4
5b is rotatably installed via pins 46 and 46.

Based on this structure, the ultrasonic probe module 38, together with the casing 31, has the guide rail 3
It is designed to be movable in the width direction of the kiln tire 3 on the 0. Further, when the air cylinder 36 is driven, the position of the ultrasonic probe module 38 with respect to the outer peripheral surface of the kiln tire 3 can be changed. The ultrasonic probe module 38 includes the parallel links 45a and 45b.
By this, the operating direction is always maintained in the axial direction of the rod 37, that is, the direction orthogonal to the outer peripheral surface of the kiln tire 3, and the reciprocating motion is enabled.

On the other hand, a drive motor 47 (drive mechanism) for moving the ultrasonic flaw detector 6 is fixed to the rear portion of the front frame 9, and the rotational force of the drive motor 47 is the power transmission mechanism 48 (drive mechanism). ), And is transmitted to the shaft 49. A pulley 50a is fixed to the shaft 49, but as shown in FIG. 1, the pulley 50a is located at one end of the front frame 9 and a separate one is provided at the opposite end. The pulley 50b is rotatably supported. A horizontal scanning belt 51 is wound between the pulleys 50a and 50b, and a connecting member 52 is fixed to a part of the horizontal scanning belt 51. The connecting member 52 is fixed to the casing 31. It is fixed to the support member 32.

According to this structure, when the drive motor 47 is driven, the rotational force of the drive motor 47 is transmitted to the pulley 50a via the power transmission mechanism 48 and the pulley 50a rotates, and accordingly, the lateral force. As the scanning belt 51 rotates, the ultrasonic flaw detector 6 fixed to the lateral scanning belt 51 moves along the guide rail 30 in the width direction of the kiln tire 3.

Next, the defect marking mechanism mounted on the traveling carriage 5 will be described. The defect marking mechanism 53 is installed on the rear frame 10, and when the ultrasonic flaw detection device 6 detects a defect on the outer peripheral surface of the kiln tire 3, marking is performed on the defect position with paint.
This is to enable the defect position to be easily discriminated when performing the defect repair work after the inspection is completed.

As shown in FIG. 2, a support plate 54 is erected on the rear frame 10, and a support body 56 is rotatably supported by the support plate 54 via a shaft 55. And
A spray can 57 is fixed to the support 56. The spray can 57 is filled with paint, and when the button 57a on the top of the spray can 57 is pressed, the paint inside is sprayed from the spray hole 57b. Further, the solenoid 5 is provided above the support 56.
8 is installed, and further, an L-shaped lever 60 is rotatably supported by a fixing pin 59 fixed to the support body 54. The one end of the lever 60 and the actuator 58a of the solenoid 58 are rotatably connected via a pin.
As described above, the spray can 57 and the solenoid 58 are fixed to the support 56, but they are designed so that the weight of the lower side of the support 56 is large, and the traveling carriage 5 is mounted on the kiln tire 3. The spray can 57 always stands upright at any position, and when the button 57a above the spray can 57 is pressed, the paint inside is surely sprayed from the spray hole 57b.

In the normal state, the actuator 5 of the solenoid 58
8a projects laterally, in which case the lever 60 is in the position shown by the chain double-dashed line. However, the solenoid 58
Is operated, the actuator 58a is pulled and the lever 60 is rotated to the position indicated by the solid line. At this time, the lever 60 pushes the button 57a of the spray can 57 so that the paint inside does not show the paint supply pipe. To be supplied to. The tip of the paint supply pipe is arranged at a position indicated by reference numeral 62 in FIG. 1 in contact with the ultrasonic flaw detector 6, and its supply port is installed toward the outer peripheral surface of the kiln tire 3. Therefore, when the ultrasonic flaw detector 6 detects a defect on the outer peripheral surface of the kiln tire 3,
The defect marking mechanism 53 is configured to mark the defect position with paint by operating the solenoid 58 in response to a signal from the control device 7 described later.

Next, the couplant supplying mechanism mounted on the traveling carriage 5 will be described. This couplant supply mechanism
A liquid having a predetermined viscosity for transmitting ultrasonic waves, a so-called couplant, is supplied to a minute space between the ultrasonic probe 39 that detects reflected waves of ultrasonic waves and the outer peripheral surface of the kiln tire 3. is there. This contact medium supply mechanism is also provided on the traveling carriage 5, and a tank (not shown) is provided on the rear frame 10, and the inside of this tank is filled with the contact medium. A medium supply pipe (not shown) is connected to the tank, and high pressure air is introduced into the medium supply pipe from a factory pipe or the like (not shown). When the high pressure air is introduced, a Venturi action is performed. The couplant in the tank is sucked into the medium supply pipe and flows in the pipe.

On the other hand, the tip of the medium supply pipe is arranged in front of the ultrasonic flaw detector 6 at a position indicated by reference numeral 64 in FIG. 1, and its supply port is installed toward the outer peripheral surface of the kiln tire 3. There is. Therefore, the couplant is always
The ultrasonic flaw detection device 6 is surely moved by moving the ultrasonic probe 39 on the outer peripheral surface of the kiln tire 3 in front of the ultrasonic flaw detection device 6 and adhering to the contact medium attached to the outer peripheral surface. Ultrasonic flaw detection can be performed.

Further, a cleaning air nozzle 81 is provided on the side of the contact medium supply port 64 which is the front portion of the ultrasonic flaw detector 6.
Is installed with its air outlet facing the outer peripheral surface of the kiln tire 3. Then, high-pressure air is introduced into the cleaning air nozzle 81 from a factory pipe (not shown) or the like, and the air is blown onto the outer peripheral surface of the kiln tire 3 so that the dust adhered to the outer peripheral surface of the kiln tire 3. It is designed to scatter foreign objects such as.

Next, the control device will be described. As shown in FIG. 8, the control device 7 is installed on the ground apart from the traveling carriage 5 described above and is connected to the traveling carriage 5 by a cable 8. It is for controlling the operation. FIG. 6 is a block diagram showing the configuration of the control device 7. As shown in this figure, the control device 7 includes a control unit 65 and a data discriminating unit 66.
It is roughly configured by.

First, the control unit 65 will be described. The counting unit 67 receives a signal from the traveling position detection mechanism 23 installed on the traveling carriage 5 and converts the current position of the traveling carriage 5 into a digital signal, and a setting input unit 68.
Is for the operator to input data such as the trajectory of the traveling vehicle 5 and the inspection range. Further, the device control and arithmetic processing section 69 controls the movement of the traveling vehicle 5 while comparing the position signal of the traveling vehicle 5 from the counting section 67 with the data from the setting input section 68 as a reference, and the data display section. It is for transmitting various data signals to 70. The marker unit 71 and the driver unit 72 receive signals from the device control and arithmetic processing unit 69 and give operation signals to the defect marking mechanism 53 of the traveling carriage 5 and the drive motors 14a, 14b and 47, respectively. Is. The data I / O unit 73 is an interface interposed between the above respective units.

Next, the data discriminating section 66 is composed of the ultrasonic flaw detector 42 and the data discriminating unit 74. The ultrasonic flaw detector 42 is a device that displays the signal of the reflected wave intensity detected by the ultrasonic probe 39 of the ultrasonic flaw detector 6 as a continuous waveform on the screen, and the detected defect of the kiln tire 3 is a waveform. It is supposed to be displayed as the peak of. The data discriminating unit 74 has a signal of a certain constant level as a reference value, compares the peak of the waveform with the reference value, and determines whether or not the peak is significant data to be determined as a defect. It is for discrimination. Then, when the data which is clearly determined as the defect is detected, the signal is transmitted to the device control and arithmetic processing unit 69 through the data I / O unit 73 of the control unit 65. Has been done.

Now, a method for inspecting a defect on the kiln tire 3 by using the kiln tire automatic flaw detector 4 having the above-mentioned structure will be described below. FIG. 7 is a view showing a method of installing the kiln tire automatic flaw detection device 4, wherein reference numeral 3 is a kiln tire, 75 is a driving rim, 2 is the ground, 7 is a control device, and 8 is a control device.
Is a cable, 5 is a traveling carriage, and 76 is a setting ladder (details will be described later).

First, the control device 7 is installed on the ground kiln tire 3
Place it in an appropriate position in the vicinity. Therefore, with the rotary kiln 1 stopped, the setting ladder 76
Is installed on the outer peripheral surface of the kiln tire 3 from above the ground 2.
This setting ladder 76 consists of two aluminum frames 7
7 is supported by a horizontal plate 78 so that the distance between the aluminum frames 77 and 7 can be adjusted.
Two elongated iron plates 80 extending in a direction parallel to the frame are supported by the horizontal plate 78 between the seven. In addition, this 2
The distance between the iron plates 80, 80 is 1 on the left and right of the traveling carriage 5.
It is set so as to match the distance between the pair of drive magnet rollers 13a and 13b.

At this point, the worker should make the side rollers 20a and 20b of the traveling carriage 5 contact the side surfaces of the aluminum frames 77, and drive the magnetic magnet rollers 13.
The traveling carriage 5 is attached to the lower portion of the setting ladder 76 so that the a and 13b are located on the upper surface of each iron plate 80.
Then, when the operator gives an instruction from the control device 7, the traveling carriage 5 rises from the lower part to the upper part along the setting ladder 76, transfers from the setting ladder 76 to the kiln tire 3, and is attached to the kiln tire 3. It is like this. At this time, the interval between the two aluminum frames 77, 77 of the setting ladder 76 is
Since the width is adjusted to match the width of the kiln tire 3, the side rollers 20a and 20b of the traveling carriage 5 directly contact the side surface of the kiln tire 3 via the setting ladder 76.

Next, after the traveling carriage 5 is mounted on the kiln tire 3 by the above-mentioned method, the traveling carriage 5 and the ultrasonic flaw detector 6 mounted on the traveling carriage 5 are controlled by the control device 7 to the initial position before the inspection. Induce to. In the case of the present embodiment, the initial position of the traveling carriage is the position 79 in FIG. 7, and the initial position of the ultrasonic flaw detector 6 is the right end position on the traveling carriage 5. At this time, the rotary kiln is operated so that the reference position magnet (not shown) is located at the position 79. After being guided to the initial position, the ultrasonic flaw detector 6 moves on the outer peripheral surface of the kiln tire 3 to start ultrasonic flaw detection. First, the ultrasonic flaw detector 6 moves from the initial position in the width direction of the kiln tire 3. When the vehicle 5 moves and reaches one end, the traveling carriage 5 slightly advances in the circumferential direction of the kiln tire 3. Then, when the ultrasonic flaw detector 6 moves in the width direction of the kiln tire 3 in the opposite direction to reach one end, the traveling carriage 5 slightly advances in the circumferential direction of the kiln tire 3. After that, the traveling vehicle 5 and the ultrasonic flaw detector 6 repeat this operation in the same manner.

That is, in the case of this embodiment, (1) movement of the ultrasonic flaw detector 6 from the right end portion to the left end portion, (2) advance of the traveling carriage 5 by a minute distance, (3) ultrasonic flaw detector 6 The traveling carriage 5 and the ultrasonic flaw detector 6 perform this cycle with one cycle of the operations (1) to (4) of moving from the left end portion to the right end portion and (4) moving the traveling carriage 5 forward by a small distance. I repeat. As a result, the ultrasonic flaw detection device 6 can move all over the outer peripheral surface of the kiln tire 3 to perform ultrasonic flaw detection.

By the way, in the ultrasonic flaw detection work, when the ultrasonic flaw detector 6 detects an abnormality on the kiln tire 3 and the data discriminating section 66 of the controller 7 judges that the abnormality is clearly a defect. Causes the defect marking mechanism 53 to operate to perform marking on the defect position, but in reality, the position of the ultrasonic probe 39 and the position of the paint supply port 62 of the defect marking mechanism 53 are different. Therefore, the defect position is temporarily stored in the device control and arithmetic processing unit 69 of the control device 7, and when the paint supply port 62 moves to the defect position later, the control device 7 operates the defect marking mechanism 53. To let it.

On the lower side of the kiln tire 3, however,
Since the members such as the drive rim 75 for driving the rotary kiln 1 are in contact with each other, the traveling carriage 5 cannot move on the entire outer peripheral surface of the kiln tire 3. Therefore, when the traveling vehicle 5 is started to move from the initial position shown by reference numeral 79 in FIG. 7, it is returned to the initial position 79 once the inspection of the upper half peripheral surface of the kiln tire 3 is completed, and further, the setting ladder. 76 is moved down so that it is moved to near the ground. Then, the worker reattaches the traveling carriage 5 to the kiln tire 3 to be inspected next,
Hereinafter, the upper half peripheral surface of the kiln tire 3 is inspected by the same procedure as described above. Then, after similarly inspecting the upper half peripheral surface of all the kiln tires 3 installed at 3 to 4 places of the rotary kiln 1, the rotary kiln 1 is rotated by 1/2, and further, by the same procedure as above. If the upper half peripheral surface of the kiln tire 3 is inspected, the inspection of the entire outer peripheral surface of all the kiln tires 3 can be completed.

The effects of the kiln tire automatic flaw detector of this embodiment will be described below. The automatic kiln tire flaw detector 4 of the present embodiment is configured such that the traveling vehicle 5 moves on the kiln tire 3 while the ultrasonic flaw detector 6 performs ultrasonic flaw detection in response to a signal from a controller 7 installed on the ground. Therefore, the worker can control the control device 7 on the ground.
The defect inspection work can be carried out only by performing two operations, ie, operating the carriage 5 and mounting the traveling carriage 5 on the kiln tire 3 using the setting ladder 76. Therefore, as in the conventional case, a large-scale scaffold is constructed for inspection, an operator performs ultrasonic flaw detection on the scaffold, which requires a great deal of labor and does not require dangerous work. Therefore, the entire inspection work can be performed reasonably and safely.

The defect position detected by this device is converted into a digital signal by the traveling position detection mechanism 23 mounted on the traveling vehicle 5 through the counting section 67 of the control device 7, and the signal data thereof is controlled by the control device. It is stored in the device control / arithmetic processing unit 69 of No. 7 or displayed on the data display unit 70. In other words, when acquiring the data of the defect position, the ability of the operator, such as the operator's eyes to see it and writing it by hand, does not intervene as in the conventional case, so that the reliability of the data is ensured. Can be improved.

Further, since the defect marking mechanism 53 connected to the control device 7 functions to mark the correct position on the defect with paint, the period between the inspection work and the subsequent defect repair work is shortened. Even if the marking part is vacant and the marking part is exposed to wind and rain during that time, the marking does not disappear, and it can be a sufficient standard for defect repair work.

Further, the contact medium supply mechanism has the traveling carriage 5
It is not necessary to supply the contact medium required for ultrasonic flaw detection from the outside of the traveling carriage 5 by using another means because it is mounted on the ultrasonic flaw detector 6. Since the ultrasonic probe 39 is disposed slightly in front of the ultrasonic probe 39, the ultrasonic probe 39 is constantly in contact with the contact medium, so that ultrasonic flaw detection can be stably performed.

Further, since the front frame 9 and the rear frame 10 of the frame of the traveling vehicle 5 are configured to be rotatable relative to each other with the traveling main body joint 11 as a central axis, the uneven surface exists on the outer peripheral surface of the kiln tire 3. Even if the heights of the drive magnet rollers 13a and 13b change, in that case, the front frame 9 and the rear frame 10 relatively rotate and the drive magnet rollers 13a and 13b rotate. 1
3b can surely contact the outer peripheral surface of the kiln tire 3 and maintain a suction state with the outer peripheral surface.

Since the ultrasonic probe module 38 constituting the ultrasonic flaw detector 6 is provided with the ultrasonic probe 39 and the guide plate 40 surrounding the ultrasonic probe 39, the guide plate 40 is the kiln tire 3 The ultrasonic probe 39 is guided along the outer peripheral surface, and even if there is a concave portion on the outer peripheral surface, for example, the ultrasonic probe 39 may fall into the concave portion and damage the ultrasonic probe 39. It is possible to solve the problem that the movement of the ultrasonic flaw detection device 6 becomes unstable.

Further, since the cleaning air nozzle 81 is installed in the front portion of the ultrasonic flaw detector 6, foreign matter such as dust adhered on the outer peripheral surface of the kiln tire 3 by the air blown on the outer peripheral surface of the kiln tire 3. Is scattered,
The rate at which the ultrasonic flaw detector 6 erroneously detects the foreign matter as a defect can be reduced, and the detection rate of the defect itself can be improved.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-mentioned embodiment, and various design changes can be made in the concrete configuration of each part. Of course. However, in order to achieve the main function of the present invention, in which the traveling carriage equipped with the ultrasonic flaw detector is mounted on the kiln tire by magnetic attraction, the balance between the weight of the traveling carriage and the magnetic strength, Sufficient consideration must be given to the strength design of each component of the traveling vehicle.

[0059]

As described in detail above, according to the automatic flaw detector for a ring-shaped structure according to any one of claims 1 to 3, a traveling carriage equipped with a drive magnet roller, a side roller and a drive mechanism is provided. , Because the controller travels in the circumferential direction on the outer peripheral surface of the ring-shaped structure, and the ultrasonic flaw detector moves in the width direction of the ring-shaped structure.
The ultrasonic flaw detector can move all over the outer peripheral surface of the ring-shaped structure to reliably detect the defect position on the outer peripheral surface. Therefore, the operator can automatically perform the defect inspection work on the ring-shaped structure by operating the control device from a position separated from the traveling carriage. That is, as in the case of the conventional defect inspection work, labor-intensive and dangerous work such as constructing a large-scale scaffold for inspection and performing ultrasonic flaw detection on the scaffold is required. Since it is unnecessary, the whole inspection work can be performed reasonably and safely.

Further, according to the automatic flaw detector for a ring-shaped structure according to the fourth aspect, a defect on the outer peripheral surface of the ring-shaped structure detected by the ultrasonic flaw detector is detected by the defect marking mechanism provided on the traveling carriage. Since the paint is automatically sprayed on the position, it is not necessary for the worker to write down the defect position in the data by handwriting as in the case of the conventional defect inspection work, and the reliability of the defect position data is eliminated. Can be improved.

According to the automatic flaw detector for a ring-shaped structure according to a fifth aspect, the ultrasonic probe of the ultrasonic flaw detector and the ring-shaped structure are provided by the couplant supply mechanism provided in the traveling carriage. Since the contact medium required for ultrasonic flaw detection is supplied to the space between the outer peripheral surface and the outer peripheral surface, it is not necessary to supply the contact medium from outside the traveling carriage, and the ultrasonic flaw detector can reliably detect the defect position. .

According to the automatic flaw detection system for a ring-shaped structure according to a sixth aspect of the invention, the frame of the traveling carriage is composed of a front frame and a rear frame, and these frames are rotatably connected to each other by a shaft. Therefore, even if, for example, there is an uneven portion on the outer peripheral surface of the ring-shaped structure, and the height of each drive magnet roller of the traveling carriage changes due to the uneven portion, each drive magnet roller is Securely adsorb on the outer peripheral surface of the ring-shaped structure,
The effect of stably mounting the entire traveling carriage on the ring-shaped structure can be achieved.

According to the automatic flaw detector for a ring-shaped structure according to the seventh aspect, since the ultrasonic flaw detector is provided with a biasing device and a guide plate, the ultrasonic flaw detector has an ultrasonic detector. The sound wave probe, by the action of the biasing device,
The ultrasonic waves are always arranged close to the ring-shaped structure side, and by the action of the guide plate, the ring-shaped structure can be smoothly moved along the outer peripheral surface regardless of the unevenness of the outer peripheral surface. The flaw detector can stably perform defect inspection.

Further, according to the automatic flaw detector for a ring-shaped structure according to the eighth aspect, air is ejected toward the outer peripheral surface of the ring-shaped structure in front of the ultrasonic flaw detector by the cleaning air nozzle. By scattering foreign matter such as dust attached to the outer peripheral surface of the ring-shaped structure, the ultrasonic flaw detector does not erroneously detect the foreign matter as a defect, and the detection rate of the defect itself can be improved.

[Brief description of drawings]

FIG. 1 is a plan view showing a traveling vehicle in an example in which an automatic flaw detection system for a ring-shaped structure of the present invention is applied to a kiln tire.

FIG. 2 is a front view of the same.

FIG. 3 is a side sectional view taken along line XX in FIG.

FIG. 4 is an enlarged view of a side arm portion of the traveling carriage.

FIG. 5 is an enlarged view of a traveling position detection mechanism portion of the traveling vehicle.

FIG. 6 is a block diagram showing a control device in the present embodiment.

FIG. 7 is a view showing a method of installing the kiln tire automatic flaw detection device of the present embodiment on a kiln tire.

FIG. 8 is a view showing a state in which the kiln tire automatic flaw detector of the present embodiment is attached to a kiln tire.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 rotary kiln 3 kiln tire (ring-shaped structure) 4 kiln tire automatic flaw detection device (automatic flaw detection device for ring-shaped structure) 5 traveling carriage 6 ultrasonic flaw detection device 7 control device 9 front frame 10 rear frame 11 traveling body joint (shaft) 13a , 13b Drive magnet roller 14a, 14b Drive motor for drive magnet roller (drive mechanism) 15a, 15b Power transmission mechanism (drive mechanism) for drive magnet roller 20a, 20b Side roller 39 Ultrasonic probe 40 Guide plate 44 Spring (with) Power device) 47 Ultrasonic flaw detector drive motor (drive mechanism) 48 Ultrasonic flaw detector power transmission mechanism (drive mechanism) 53 Defect marking mechanism 81 Cleaning air nozzle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuo Ohno 1720 Ishikawa-Kuni, Higashimura, Inashiki-gun, Ibaraki Prefecture Kasumigaura Inspection and Measurement Co., Ltd. Off 1720 Ishikawajima Inspection and Measurement Co., Ltd., Kasumigaura Works

Claims (8)

[Claims] 1. A traveling carriage having mounting means for mounting to a ring-shaped structure by magnetic attraction, and configured to travel in the circumferential direction on the outer peripheral surface of the ring-shaped structure, and this traveling. An ultrasonic flaw detection device mounted on a carriage for detecting a defect on the outer peripheral surface of the ring-shaped structure, and a control device for controlling the traveling of the traveling carriage from a position separated from the traveling carriage. Automatic flaw detector for ring-shaped structures. 2. The automatic flaw detector for a ring-shaped structure according to claim 1, wherein the traveling carriage magnetically attracts the outer peripheral surface of the ring-shaped structure to the frame and travels on the outer peripheral surface. A drive magnet roller that constitutes the mounting means, a side roller that contacts the side surface of the ring-shaped structure to hold the traveling carriage, and a drive mechanism that rotationally drives the drive magnet roller are provided. Automatic flaw detector for ring-shaped structures. 3. The automatic flaw detector for a ring-shaped structure according to claim 1, wherein the ultrasonic flaw detector is movably mounted on the traveling carriage in the width direction of the ring-shaped structure. An automatic flaw detection system for a ring-shaped structure, wherein the traveling vehicle is provided with a drive mechanism for moving the ultrasonic flaw detection system in the width direction. 4. The automatic flaw detector for a ring-shaped structure according to claim 1, wherein the traveling carriage has a defect position on the outer peripheral surface of the ring-shaped structure detected by the ultrasonic flaw detector. An automatic flaw detection device for a ring-shaped structure, which is provided with a defect marking mechanism for spraying paint on the top. 5. The automatic flaw detector for a ring-shaped structure according to claim 1, wherein the traveling carriage has an ultrasonic probe of the ultrasonic flaw detector and an outer periphery of the ring-shaped structure. An automatic flaw detection system for a ring-shaped structure, comprising a couplant supply mechanism for supplying a couplant to the space between the surfaces. 6. The automatic flaw detector for a ring-shaped structure according to claim 1, wherein a frame of the traveling carriage is configured as a front frame and a rear frame as separate bodies, and The drive magnet roller is provided on each of the front and rear frames, and the front and rear frames are rotatably connected to each other by a shaft located along the tangential direction of the ring-shaped structure. Automatic flaw detector for ring-shaped structures. 7. The automatic flaw detector for a ring-shaped structure according to claim 1, wherein the ultrasonic probe of the ultrasonic flaw detector is a ring-shaped structure. An automatic flaw detection device for a ring-shaped structure, which is provided with a biasing device for biasing the ultrasonic probe and a guide plate around the ultrasonic probe. 8. The automatic flaw detection device for a ring-shaped structure according to claim 1, wherein the traveling trolley is installed in front of the ultrasonic flaw detection device and has a ring-shaped structure. An automatic flaw detection device for a ring-shaped structure, comprising an air nozzle for cleaning that ejects air toward the outer peripheral surface of the.