JPH039802Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is particularly suitable for use in wedges used when demolishing concrete walls of nuclear reactors contaminated with radioactivity or rocks contaminated with lead, etc. This invention relates to a crusher having a friction reducing agent application function.

(Prior Art) Conventionally, concrete walls of nuclear reactors contaminated with radioactivity or rocks contaminated with lead, etc., have been dismantled by crushing them by press-fitting wedges using hydraulic pressure or vibration. In this demolition method, the wall or rock to be demolished is dangerous because it is contaminated with radioactivity and lead, so it is not possible to manually apply a friction reducing agent to the wedge, and therefore it is not possible to dismantle it without applying it. The work was done.

(Problem to be solved by the invention) If a wall, rock, etc. is crushed without using a friction reducing agent in the wedge as in the above conventional method, the load applied to the wedge becomes extremely large, and therefore a large applied force is applied. There was a problem with the need for equipment.

(Means for Solving the Problems) The present invention involves interposing a mounting plate on the distal end surface of a rod attached to a cylindrical arm to mount the wedge in a replaceable manner, and mounting boards on the front and back surfaces of the rod, respectively. 4 provided on the base end side of the upper and lower surfaces located on the cylindrical arm side of each mounting board.
The base ends of the cylinders of the hydraulic system for advancing and retracting are rotatably supported on the two shaft support plates, and wedges are clamped from above and below at the tips of the rods attached to each of the cylinders. A friction reducing agent coated plate is fixed, and a friction reducing agent injection hole is passed through the friction reducing agent coated plate, an injection pipe is connected to an outer end of the injection hole, and an injection hole in contact with the wedge is connected to an injection hole. A diffusion groove is communicated with the inner end, and furthermore, the tips of the rods installed on both the upper and lower sides of the cylinders of the vertical movement hydraulic system are pivotally supported by the respective cylinders of the respective advance/retreat hydraulic systems, while the wedges When the friction reducer coated plate is moved forward by the advance/retreat hydraulic device, the friction reducer coated plate is brought into close contact with the tapered face of the wedge, and the friction reducer coated plate is brought into close contact with the tapered face of the wedge. The above problem can be solved by separating the friction reducer coated plate from the tapered surface of the wedge when the friction reducer coated plate is retreated by the advance/retreat hydraulic device after the application of the friction reducer is completed. Settled.

(effect) The function of the present invention is as follows.

When the friction reducer coated plate is brought into close contact with the tapered surface of the wedge by the hydraulic device for vertical movement and the friction reducer coated plate is advanced by the advance/retreat hydraulic device, the used friction reducer is removed at the front edge of the friction reducer coated plate. Foreign materials such as additives and concrete powder are removed, and new friction reducing agent is automatically applied immediately to the removed tapered surface. After the coating is completed, the friction reducing agent coating plate is moved away from the tapered surface of the wedge by the vertical movement hydraulic device and is moved backward by the advancing/retreating hydraulic device without contacting the friction reducing agent.

(Embodiment) An example of the implementation of the present invention will be described in detail with reference to the drawings. In the drawing, 1 is a cylindrical arm, and the base end side of the cylindrical arm 1 is a work chamber or a work tower (not shown). If the means of crushing the concrete wall or rock is static crushing using hydraulic pressure, it is connected to hydraulic equipment for crushing, or if the crushing means is dynamic crushing using vibration, it is connected to vibration equipment for crushing. has been done. A telescopic rod 2 is attached to the cylindrical arm 1, and a mounting plate 3 is attached to the distal end of the rod 2.
A wedge 4 having a tapered surface is attached to the wedge 4 so as to be replaceable.
It is formed so that it can be crushed by press-fitting it into a concrete wall or rock.

Then, the mounting boards 5 are placed parallel to the wedges 4 at symmetrical positions on the front and back sides of the rod 2, respectively.
are fixed in a protruding manner, and four shaft supporting plates 6 are respectively provided in a protruding manner on the base end side of the upper and lower surfaces of the mounting board 5 located on the cylindrical arm 1 side. At the tips of rods 9, which rotatably support the base ends of the cylinders 8 of the advancing and retracting hydraulic devices 7, and which are attached to the cylinders 8 facing each other on the upper and lower surfaces,
Two friction reducing agent coated plates 10 are fixed so as to sandwich the wedge 4 from above and below, respectively. Each of the friction reducing agent coating plates 10 has an injection hole 11 passing through it in the vertical direction for transferring the friction reducing agent to the tapered surface of the wedge 4, and the friction reducing agent is applied to the outer end of the injection hole 11. An injection pipe 12 for injecting is connected to the injection hole 11, and an injection hole is provided at the inner end of the injection hole 11 in contact with the wedge 4 so that the friction reducing agent can be diffused and applied from the injection hole 11 to the tapered surface of the wedge 4. A diffusion groove 13 is provided in communication with the wedge 4 over substantially the entire length in the width direction of the wedge 4 in a direction perpendicular to the groove 11 . An elongated opening 14 through which the agent flows out is provided in communication with the diffusion groove 13 , and the friction reducing agent that has flowed into the diffusion groove 13 flows out through the elongated opening 14 to transfer the friction reducing agent to the wedge 4 . Although it is formed so that it can be applied to a tapered surface, the front side of the friction reducing agent application plate 10 that contacts the wedge 4, which is the opposite side of the elongated opening 14, is formed so as to be in close contact with the tapered surface of the wedge 4. .

The ends of the rods 17 respectively installed on the upper and lower sides of the cylinder 16 of the vertical movement hydraulic system 15 are pivotally supported by the cylinders 8 of the two sets of advancing/retreating hydraulic devices 7 facing each other in the vertical direction, so that the vertical movement hydraulic pressure is Device 1
By moving each rod 17 of 5 up and down, each hydraulic device 7 for advancing and retracting can be expanded and closed. The friction reducing agent coating plate 10 that moves forward through the operation of the hydraulic system 7 can be brought into close contact with the tapered surface of the wedge 4, and conversely, by advancing each rod 17 of the vertical movement hydraulic system 15 from the cylinder 16, each The friction reducing agent coated plate 10, which is moved backward by the movement of the advancing/retracting hydraulic device 7, is slightly spaced apart from the tapered surface of the wedge 4, and is configured to be able to move backward without coming into contact with the tapered surface of the wedge 4.

Next, the operation of this embodiment will be explained. After a contaminated concrete wall or rock is pressed into the wedge 4 and crushed, a stopper (not shown) is opened and the friction reducing agent is injected into the injection hole 11 from the injection pipe 12. When the friction reducing agent coating plate 10 is injected and the advancing/retracting hydraulic device 7 advances the friction reducing agent coating plate 10 and the vertical movement hydraulic device 15 brings the friction reducing agent coating plate 10 into close contact with the tapered surface of the wedge 4, the friction reducing agent coating plate 10
The front side of the wedge 4 slides forward in close contact with the tapered surface of the wedge 4, and removes the used friction reducing agent that was previously applied to the tapered surface of the wedge 4.
Powder of concrete, rock, etc. adhering to the tapered surface of the wedge 4 is removed, and a new friction reducing agent is applied to the tapered surface of the wedge 4 after these foreign substances have been removed. After the coating is completed, a stopper (not shown) stops the injection of the friction reducing agent into the injection pipe 12, and the vertical movement hydraulic device 15 moves the friction reducing agent application plate 10 slightly away from the tapered surface of the wedge 4. , after moving the friction reducing agent coating plate 10 to the base end by the advancing/retracting hydraulic device 7, the wedge 4 is moved.
It is press-fitted into concrete walls, rocks, etc. to crush them.

(Effects of the invention) Since the invention is as described above, the friction reducing agent can be applied to the tapered surface of the wedge automatically and by remote control, and the used friction reducing agent can also be removed along with other foreign substances. It is particularly effective for demolishing concrete walls of nuclear reactors contaminated with radioactivity, where friction reducing agents cannot be applied by hand, and rocks contaminated with lead, etc.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention; FIG. 1 is a plan view, FIG. 2 is a front view, and FIG. 3 is an enlarged vertical sectional front view of the main parts. In the figure, 1 is a cylindrical arm, 2 is a rod, 3 is a mounting plate, 4 is a wedge, 5 is a mounting board, 6 is a shaft support plate, 7 is a hydraulic device for advancing and retreating, 8 is a cylinder, 9 is a rod, 1
0 is a friction reducing agent coated plate, 11 is an injection hole, 12 is an injection pipe, 13 is a groove for diffusion, 15 is a hydraulic device for vertical movement, 16 is a cylinder, and 17 is a rod.

Claims (1)

[Scope of utility model registration request] A mounting plate is interposed on the distal end surface of the rod attached to the cylindrical arm, and the wedge is attached in a replaceable manner, and a mounting board is protruded and fixed to the front and back sides of the rod, respectively, and the cylindrical shape of each mounting board is fixed. The base ends of the cylinders of the advance/retreat hydraulic system are rotatably supported on four shaft support plates provided on the base end side of the upper and lower surfaces located on the arm side, and the base ends of the cylinders of the hydraulic system for advancing and retracting are rotatably supported. Two friction-reducing agent-coated plates are fixed to the tip of the rod, each holding a wedge from above and below, and a friction-reducing agent injection hole is passed through the friction-reducing agent-coated plates, and the friction-reducing agent is inserted into the outer side of the injection hole. An injection pipe is connected to the end, and a diffusion groove is connected to the inner end of the injection hole in contact with the wedge, and furthermore, each cylinder of each advance/retreat hydraulic device is connected to the upper and lower sides of the cylinder of the vertical movement hydraulic device, respectively. The friction reducing agent coating plate is applied to the tapered surface of the wedge when the friction reducing agent coating plate is moved forward by the advancing/retracting hydraulic device. When the friction reducing agent coating plate is brought into close contact with the tapered surface of the wedge and after the application of the friction reducing agent to the tapered surface of the wedge is completed, the friction reducing agent application plate is retreated by the advancing/retracting hydraulic device,
A crusher having a friction reducing agent application function configured to separate a friction reducing agent applied plate from a tapered surface of a wedge.