JPH07958Y2 - Powder suction device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a powdery or granular material suction device for sucking powdery or granular material contained in a drum and pneumatically transporting it to the next step.

[Prior Art] Radioactive waste generated from a nuclear power plant or the like is roughly classified into three types: gas, liquid, and solid, and the radioactivity is classified into high level, medium level, and low level. And conventionally,
Combustibles of low-level solid waste are incinerated and the ash is stored in drums.

However, as the amount of such solid waste increases, a large amount of ash after incineration is generated, and the amount of storage also increases year by year, so the above-mentioned treatment naturally has its limits. Therefore,
The treatment of the fixed waste (incineration ash) using microwaves is disclosed in, for example, Japanese Patent Laid-Open No. 55-143380.

As the radioactive waste treated by these microwave melting devices, so-called incinerated ash which has been once incinerated is used, instead of directly treating the radioactive waste discharged from a nuclear power plant or the like.

Then, such incinerated ash is stored in a drum and carried to the processing plant. At the treatment plant, the incineration ash is pneumatically transported from the drum through an aspirator as disclosed in JP-A-62-138799, and the air and the incineration ash are removed by using a cyclone, a filter (cloth, paper) or the like. Is separated and the incinerated ash is stored in the hopper and supplied to the feeder as needed.

[Problems to be solved by the device]

However, when inhaling the incineration ash stored in the drum as described above with an aspirator, the incinerator ash contains various large and small lumps, and the particle size distribution is not uniform, so the lump is clogged in the aspirator, There is a possibility that the processing in the next process may be hindered.

The present invention was devised in view of such circumstances, and when sucking powder particles with uneven particle size distribution housed in a drum can, crush a large lump of powder particles and transfer it to the next step. An object is to provide a powdery or granular material suction device that can be used.

[Means for Solving the Problems]

In order to achieve such an object, a powdery-particles suction device according to a first aspect of the present invention includes a rotatable support base on which a drum containing the powdery particles is placed, and a rotation unit that rotates the support base.
A cylindrical hammer storage case that is closed at least on the upper side and that moves up and down through a lifting device in a drum can placed on the support table, and a disc axially mounted on the central axis of the hammer storage case. And a disc rotating means for rotating the disc, and an outer periphery of the hammer storage case,
A hopper that introduces the granular material in the drum that rotates with the support into the hammer storage case, and a rotatably attached to the above-mentioned disc, and the mass of the granular material introduced into the storage case is rotated by the disc. A hammer for crushing between the inner wall surface of the hammer storage case using the crushed powder and granular material storage chamber that communicates with the hammer storage case via a plurality of communication holes formed in the peripheral wall of the hammer storage case, The suction pipe is opened in the crushed powder or granular material storage chamber and sucks the powder or granular material introduced into the crushed powder or granular material storage chamber from the hammer storage case.

Further, in the powdery or granular material suction device according to the second aspect, a limit switch for detecting that the hammer storage case reaches the bottom of the drum can is attached to the hammer storage case. Furthermore, the invention according to claim 3 is one in which the inner wall surface of the hammer storage case is engraved.

[Action]

According to the powder and granular material suction device of the first aspect of the present invention, when the hammer storage case is lowered by the elevating device into the drum can placed on the support base, the rotation of the drum can causes the upper part of the drum can to rotate. The granules are sequentially introduced into the hammer storage case via the hopper.

And the granular material introduced into the hammer storage case,
Since the hammer is rotating in the hammer storage case,
Guided in the direction of rotation of the hammer, the centrifugal force of the hammer pushes it toward the inner wall surface of the hammer storage case to allow it to flow from the communication hole into the crushed powder granule storage chamber, where it is sucked by the suction pipe. Also, the large lumps contained in the granular material are
It is sequentially crushed between the rotating hammer and the inner wall surface of the hammer storage case, and is sucked by the suction pipe together with other powder particles through the crushed powder particle storage chamber. When sucking the powder or granules as described above, the hammer storage case is automatically moved by the lifting device or manually moved up or down to rotate a mass of the powder or granules larger than the suction port of the hopper. It can be introduced into the hammer part and crushed by a hammer.

If the limit switch is attached as described in claim 2, some kind of display device is activated when the hammer storage case reaches the bottom of the drum can, and the operator is informed accordingly. Further, if the inner wall surface of the hammer storage case is provided with irregularities as described in claim 3, the lumps in the powder and granules can be efficiently crushed.

〔Example〕

An embodiment in which the invention described in claim 1, in which a limit switch is attached to a hammer storage case and the inner wall surface thereof is provided with an unevenness, is used in a process of treating radioactive waste (incineration ash) using microwaves. Will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 1 is a support frame of the powder / granular material suction device according to the present embodiment, 2 is a base, and 3 is a slide member to which an arm member 7 having a motor 5 mounted is attached. Are connected to a winch 9 provided on the support frame 1 via a wire rope 11. And the winch 9
By winding the wire rope 11 around the wire or gradually unwinding the wire, the rollers 15 and 17 roll on the guide rails 13 provided on both side surfaces 1a of the support frame 1 as shown in FIG. 3 moves up and down along the guide rail 13. Further, in the figure, reference numeral 19 is a wheel axially attached to the upper end portion of the support frame 1, and one end of the wire rope 11 wound around the winch 9 is spanned by the slide member 3 via the wheel 19. .

Reference numeral 21 is a shaft cover bolted to the arm member 7 via brackets 23 and 24a.
A drive shaft 27 supported by a bearing 25a is inserted therein. Then, the drive shaft 27 is passed through the V-belt 33 spanned between the pulley 29 mounted on the upper end of the drive shaft 27 protruding into the arm member 7 and the pulley 31 mounted on the motor 5. It is adapted to be rotated by a motor 5. Further, a bracket 24b provided with a bearing 25b that supports the drive shaft 27 is attached to the lower end of the shaft cover 21, and the hammer storage case 35 is connected to the shaft cover 21 via the bracket 24b. It has a structure. The lower end portion of the drive shaft 27 supported by the bearing 25b has a structure penetrating the hammer storage case 35.

The hammer storage case 35 includes a cylindrical case 37 (hereinafter referred to as “case”) having an inward flange 37a formed in an upper opening, and a case lid 39 provided with an outward flange 39a bolted to the flange 37a. Is formed by.
The drive shaft 27 penetrates the case lid 39, and the disk-shaped hammer desk 41 attached to the lower end of the drive shaft 27 forms the same plane as the flange 37a. 37 top openings 4
Located in 3.

Further, as shown in FIG. 3, a hopper 47 for introducing the incineration ash in the drum can 45 into the case 37 is attached to the outer periphery of the case 37, and the drum can on the support base 51 by a drive motor 49 described later. When 45 rotates in the direction of arrow A, the incineration ash in the drum can 45 is introduced into the case 37 from the hopper 47 through the incineration ash introduction port 53 provided in the case 37. The distance l from the center O of the case 37 to the tip 47a of the hopper 47 is set to be slightly shorter than the radius m of the drum can 45. Further, the crushed incineration ash storage chamber (hereinafter referred to as "combustion ash storage chamber" that communicates with the inside of the case 37 through a plurality of communication holes 55 formed in the peripheral wall surface on the outer periphery on the side opposite to the hopper 47 with the center O of the case 37 interposed therebetween. 57) is provided, and the incineration ash introduced into the case 37 is finally sent to the cyclone and the filter in the next process through the suction pipe 59 connected to the storage chamber 57. It is like this. Further, as shown in FIG. 4, a large number of irregularities 61 are formed on the inner wall surface 37b of the case 37, and the hammer storage case 35 reaches the bottom of the drum can 45 at the lower outer periphery of the case 37. A limit switch 62 for detecting this is attached, and when the hammer storage case 35 reaches the bottom of the drum can 45, the limit switch 62 is activated and an indicator lamp or the like is turned on.

Further, in FIG. 3, reference numeral 63 designates four hammers axially attached to the hammer desk 41 at intervals of 90 ° by hammer holding bolts 65, and the hammer 63 is as shown in FIG. A lump 67 of powder or granules introduced into the case 37 is crushed between the unevenness 61 and the rotation of the hammer desk 41, and the incinerated ash of the crushed lump 67 is passed through the communication hole 55. After being sent to the storage chamber 57, it is sucked by the suction pipe 59.

On the other hand, a support 51 on which a drum 45 containing the incinerated ash is placed
Is rotatably mounted on the base 2 so as to face the hammer storage case 35, and the support base 51 is rotated by a motor 49 also installed on the base 2. That is, in FIG. 1, reference numeral 69 is a pulley mounted on the leg 51a of the support base 51, 71 is a pulley mounted on the motor 49, and the motor is driven by the V-belt 73 bridged between the pulleys 69 and 71. The rotational force of 49 is transmitted to the support base 51. Then, by lowering the hammer storage case 35 provided with the hopper 47 and the like in the drum can 45 placed on the support table 51 and rotating the support table 51, the incinerated ash in the drum can 45 is stored in the hammer can from the hopper 47 as described above. It will be installed in Case 35.

In addition, in FIG. 1, reference numerals 75 and 77 are seal members for achieving airtightness between the drive shaft 27, the bracket 23, the case lid 39, and the hammer desk 41, respectively. When the incineration ash introduced into the hammer storage case 35 is sucked by the suction pipe 59, the incineration ash does not flow into the shaft cover 21 and hinder the bearing 25 and the like. Further, reference numeral 79 is a suction pipe.
59 is a supporting member, and 81 is a winch 9 manual handle.

Since the present embodiment is configured in this way, when the drum can 45 containing the incinerated ash is loaded by the unmanned transporter or the like and placed on the support base 51 by the elevating device or the like, first, the support base 51 is removed. The drum can 45 is rotated to rotate in the direction of arrow A. At this time, the hammer storage case 35 is wound upward by the winch 9.

Next, the wire rope 11 wound around the winch 9 is loosened, the hammer storage case 35 is gradually lowered, and when the hammer storage case 35 reaches the opening of the drum can 45, the motor 5 is driven to drive the hammer. When the desk 41 is rotated in the same direction as the rotation of the drum can 45, and at the same time, the pump is driven to start suction of the suction pipe 59 and the hammer storage case 35 is further lowered, the incinerated ash in the drum can 45 is at the bottom of the case 37. It is introduced into the case 37 through the opening. Also, drums 45
The incineration ash of the upper surface portion in the drum can 45 is introduced into the case 37 through the hopper 47 by the rotation of.

Then, the incineration ash introduced into the case 37 has four hammers 63 rotating in the case 37 in the direction of arrow A,
Guided in the same direction, the centrifugal force of the hammer 63 pushes it toward the inner wall surface of the case 37, flows into the storage chamber 57 from the communication hole 55, and is sucked by the suction pipe 59.

A large lump 67 contained in the incinerated ash is sequentially crushed between the rotating hammer 63 and the unevenness 61 as shown in FIG.
It will be sucked at 59. When sucking incinerated ash as described above, use a winch 9 to properly insert a hammer storage case.
35 is moved up and down, for example, 30 to 50 mm, and a mass of incineration ash larger than the suction port of the hopper 47 is introduced into the rotary hammer part,
It can be crushed with a hammer 63.

When the hammer storage case 35 reaches the bottom of the drum can 45, the limit switch 62 turns on the indicator lamp. At this stage, the handle 81 is operated to wind the wire rope 11 around the winch 9, and the hammer storage case 35 is operated. Can be pulled up. Then, after the incineration ash has been sucked, the drum can 45 is replaced with the next drum, and the incineration ash in the drum can is sucked through the same process.

As described above, in this embodiment, when the incineration ash stored in the drum can 45 is sucked and pneumatically transported to the cyclone and the filter, the lump in the incineration ash is hammered by the hammer 63 and the hammer storage case 35.
Since it is finely crushed by the inner concaves and convexes 61, there is no possibility that the lump in the incinerated ash is clogged with the suction device and the treatment in the next step is hindered as in the conventional case. Further, by installing the limit switch 62, the operator can accurately determine the time when the winch 9 is operated and the hammer storage case 35 is pulled up.

In the above embodiment, the hammer storage case 35 is attached to the winch 9.
Although it was manually moved up and down by using, this may be automated. Further, the above-mentioned embodiment uses the present invention in the process of treating radioactive waste (incineration ash) by using microwaves, but the application field of the present invention is not limited to the above-mentioned embodiment, and the drum can The present invention can be applied to other technical fields in which powder particles such as cement stored in the air are transferred by air.

[Effect of device]

As described above, the powder or granular material suction device according to claim 1 is
A rotatable support base on which the drum can containing the powder and granules is mounted, a rotating means for rotating the support base, and at least an upper side is closed, and a lifting device is installed in the drum can mounted on the support base. A cylindrical hammer storage case that moves up and down through the disk, a disc axially mounted on the center axis of the hammer storage case, and a disc rotating means for rotating the disc.
A hopper that is attached to the outer periphery of the hammer storage case and that introduces the granular material in the drum that rotates with the support table into the hammer storage case, and the granular material that is rotatably attached to the disc and that is introduced into the storage case. A hammer for crushing the lump of the slag between the inner wall surface of the hammer storage case and the inner wall surface of the hammer storage case, and the hammer storage case is communicated with the hammer storage case through a plurality of communication holes formed in the peripheral wall of the hammer storage case. The crushed powder storage chamber and the suction pipe that opens into the crushed powder storage chamber and sucks the powder introduced into the crushed powder storage chamber from the hammer storage case Of the powder particles introduced into the inside, the powder particles having a large lump are crushed between the rotating hammer and the unevenness and sucked by the suction pipe. In addition, a mass of powder or granules that is larger than the suction port of the hopper
After the hammer storage case is moved up and down and introduced into the rotary hammer part, it can be crushed by a hammer. Therefore, a large lump in the granular material is not clogged during the air transfer, and the treatment in the next step is not hindered.

If the limit switch 2 is attached to the powder / particle suction device as described in claim 2, some display device is activated when the hammer storage case reaches the bottom of the drum, and the operator is informed accordingly. The operator has the advantage of being able to accurately determine when to lift the hammer storage case by operating the lifting device. Further, if the inner wall surface of the hammer storage case is provided with irregularities as in claim 3, the lump can be efficiently crushed.

[Brief description of drawings]

FIG. 1 is an overall side view of an embodiment of a powder / particle suction device according to claim 1 of the present invention in which a limit switch is attached to the hammer storage case, and the hammer storage case is indicated by I in FIG.
-Indicates a state cut along the line I. FIG. 2 is a sectional view taken along line II-II in FIG. FIG. 3 is a plan view of the hammer storage case. FIG. 4 is a perspective view of the case and the storage chamber. FIG. 5 is an explanatory view for explaining the function of the hammer. [Explanation of symbols for main parts] 7 ... Arm member 27 ... Drive shaft 35 ... Hammer storage case 45 ... Drum can 47 ... Hopper 51 ... Support 57 ... Storage room 59 ... Suction pipe 63 ... …hammer.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G21F 9/36 Z 7381-2G

Claims (3)

[Scope of utility model registration request] 1. A rotatable support base on which a drum can containing powder and granules is mounted, a rotating means for rotating the support base, and a drum can mounted on the support base with at least an upper side closed. A cylindrical hammer storage case that moves up and down through an elevating device, a disc axially mounted on the central axis of the hammer storage case, a disc rotating means for rotating the disc, and the hammer. A hopper that is attached to the outer periphery of the storage case and that rotates with the support base to introduce the powder or granular material in the drum can into the hammer storage case, and the disc that is rotatably attached to the hopper. A hammer that crushes a lump between the inner wall surface of the hammer storage case by using the rotation of the disk, and a powder that communicates with the hammer storage case through a plurality of communication holes formed in the peripheral wall of the hammer storage case. Powder particles comprising a powder particle storage chamber and a suction pipe that opens into the crushed powder particle storage chamber and sucks the powder particles introduced into the crushed powder particle storage chamber from the hammer storage case. Body suction device. 2. The powder / particle suction device according to claim 1, wherein a limit switch for detecting that the hammer storage case has reached the bottom of the drum can is attached to the hammer storage case. 3. The powdery or granular material suction device according to claim 1 or 2, wherein the inner wall surface of the hammer storage case is provided with irregularities.