JPH0435706Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to an inner wall construction device for efficiently dismantling and assembling the inner wall of a cylindrical structure by remote control.

(Prior Art) Works such as repairing, inspecting, and replacing bricks on the inner walls of cylindrical structures such as blast furnaces and factory chimneys have traditionally been carried out manually using scaffolding. In this case, (A) it will take time to erect and remove scaffolding;

(B) Work at heights is dangerous.

(C) There is often dust, harmful gas, etc. inside.
Bad work environment.

(D) Work speed is slow because the work is done manually.

There are drawbacks such as.

(Purpose of the invention) This invention was made to eliminate these conventional drawbacks.It is a relatively compact device that does not require work inside the pit, and allows for efficient dismantling and assembly of inner walls. The present invention provides a device that can perform the following steps.

(Structure of the invention) This invention is an inner wall construction device disposed inside a cylindrical structure and having means for dismantling the inner wall,
a plurality of support legs attached to the inner wall disassembly means main body and protruding in the horizontal direction; a support pad attached to the tip of the support legs and abutted against the inner wall;
drive means for advancing and retracting the support leg, the support pad is attached to the tip of the support leg via a spherical bearing so that the direction can be changed, and the support pad is oriented horizontally to the tip of the support leg. It is supported through springs.

In the above structure, the inner wall dismantling means main body having the working means is fixed in the pit by the support legs, and the support pad that contacts the inner wall is attached to the support legs so that the direction can be changed, so that it can cope with the unevenness of the inner wall. to ensure secure crimping.

(Example) In FIG. 2, an inner wall construction device main body 2 is disposed in the center of a pit 10 surrounded by an inner wall 1, which is a cylindrical structure, and is suspended from a rope 21. A dismantling means 8 for the inner wall 1 is attached to. This main body 2 is provided with a support section 20,
A plurality of support legs projecting in the horizontal direction and support pads 51 and 53 attached to the tips of the support legs and abutted against the inner wall 1 are attached to the support portion 20.

As shown in FIG. 2, the support pads are arranged such that a support pad 52 is placed below the support pad 51, and a support pad 54 is placed below the support pad 53. By arranging them in two stages above and below, the support state can be made more stable, but
They may be arranged in one row above and below.

As shown in FIG.
is formed in this recess 22, and the cylinders 31, 3
2, 33, and 34 are fitted, respectively, and piston rods forming support legs 41, 42, 43, and 44 are fitted into these, respectively, thereby forming a hydraulic cylinder. As shown in FIGS. 4 and 5, a support pad 53 is attached to the distal end 43a of the support leg 43 so as to be able to change its direction. That is, a spherical bearing 90 is attached to the tip 43a of the support leg 43, while the support pad 5
3 has a shaft 70 attached thereto, and a spherical bearing 80 is attached to its outer periphery, and both spherical bearings 80 and 9
0 are fitted into each other in surface contact with each other, thereby coupling the support leg 43 and the support pad 53.
Therefore, the support pad 53 not only swings around the shaft 70 but also swings in the spherical bearings 80 and 9 in a direction perpendicular to the shaft 70.
It is possible to swing by sliding between 0 and 0, and it is possible to slide in any direction. Further, a compression spring 60 is interposed between the support pad 53 and the support leg 43, so that the support pad 53 is supported so as to face in the horizontal direction.

Further, a bellows 50 is attached between the support pad 53 and the support portion 20 to cover the support leg 43 and the spherical bearing portion. Although the support legs 41, 42, and 44 are not shown, the structure of the attachment portion of the support pad is the same as described above.

As shown in FIG. 1, the control device for the hydraulic cylinders includes a pressure oil supply pump 6 that supplies pressure oil to each of the hydraulic cylinders, a tank 60 that receives return oil,
It has first, second, third, and fourth control sections 36, 37, 38, and 39 arranged in those pipes. The control section 36 includes an electromagnetic switching valve 61, a cutoff valve (no-leak electromagnetic switching valve) 91 and a check throttle valve 71 communicating with the head side of the hydraulic cylinder 31, and a check throttle valve 72 communicating with the rod side. Similarly, the second control section 37 controls the electromagnetic switching valve 62 and the hydraulic cylinder 32.
a cutoff valve (no-leak electromagnetic switching valve) 92 and a check throttle valve 73 communicating with the head side of the
It has a check throttle valve 74 communicating with the rod side. The third control section 38 also controls a pressure reducing valve 65, an electromagnetic switching valve 63, a check throttle valve 93 communicating with the head side of the hydraulic cylinder 33, a pilot operator check valve 81, and a check throttle valve communicating with the rod side. It has a valve 94. Similarly, the fourth control section 39 includes a pressure reducing valve 66, an electromagnetic switching valve 64, a check throttle valve 95 communicating with the hydraulic cylinder 34, a pilot operator check valve 82, and a check throttle valve communicating with the rod side. It has a tutle valve 96.

FIG. 3 shows an example of a guide means for supporting legs, and shows an example in which three supporting legs are provided radially. In this way, the support legs may be provided so as to protrude to both left and right sides in the horizontal direction, or may be provided radially in the horizontal direction. An arm 27 located on the side of the support leg 41 is integrally provided, and the arm 27 functions to prevent the support leg 41 from rotating by being guided by a guide 28 and moving together with the support leg 41. The arm 27 also operates the potentiometer 26 and the switch 25 to indicate the amount of protrusion of the support leg 41 and the state in which the support leg 41 is completely retracted. Similarly, the support leg 43 is provided with an arm 27, by means of which the potentiometer 26 and the limit switch 25 are actuated.

In the above configuration, each support leg 41, 42, 4
3 and 44 are immersed, the main body 2 is attached to the rope 21
The solenoid switching valves 61 and 62 of the control section are placed in the upper position, and each cutoff valve 9 is placed in the pit 10.
Pump 6 with 1 and 92 in the lower position.
Pressure oil is supplied to the head sides of the hydraulic cylinders 31, 32 from the piston, and the support legs 41, 42 are projected by a predetermined amount preset according to the size of the pit 10, so that the support pad 51 is brought into contact with the inner wall 1. By switching the electromagnetic switching valves 61, 62 and the cutoff valves 91, 92 to the illustrated positions, the support legs 41, 42 are reliably prevented from retracting. This allows the main body 2
is positioned at the center of the pit 10.

Next, with the electromagnetic switching valves 63 and 64 of the control section in the upper position, pressurized oil is supplied from the pump 6 to the hydraulic cylinder 3.
Supplied to the head side of 3 and 34, two support legs 4
3 and 44 respectively, the support pad 53 is brought into contact with the inner wall 1, and is crimped at a predetermined pressure while being monitored with a pressure gauge 100. As a result, the support portion 20 and the main body 2 integrated therewith are connected to the pit 1.
It is fixed and supported at the center of 0.

In this way, by fixing one support leg to ensure that the main body 1 is positioned at the center of the pit 10, and by crimping the other support pad to the inner wall, the unevenness of the inner wall of the pit 10 can be avoided. Correspondingly, it is possible to support with the optimum supporting force.

When each support pad is crimped onto the inner wall 1, the support pad can swing in any direction.
The pads are crimped perpendicularly to the abutting surface according to the unevenness of the inner wall 1, so that the crimping force can be applied uniformly to each support pad, and the bending moment can be reliably applied to the support legs. It can be prevented. In other words, when the support pad is fixedly attached to the support leg, if the inner wall 1 has unevenness and the contact surface is inclined, the support pad will come into contact with one side and apply a bending moment to the support leg. However, when the support pad is crimped perpendicularly to the abutment surface as described above, the reaction force of the crimping acts in the axial direction of the support leg through the shaft, which causes a bending moment on the support leg. will not work.

In this state, the inner wall 1 is dismantled by the dismantling means 8 or the like. This work can be done remotely while being monitored by a TV camera. After the disassembly work is completed, each support pad 51,
52, 53, and 54 should be moved backward. On this occasion,
The pilot operating check valves 81 and 82 are
It is opened by the pressure oil supplied to the rod side of the hydraulic cylinder, and the pressure oil on the head side is returned to the tank 60.

In this way, the main body 2 is supported and fixed by the support legs, and the wall material cut into blocks and dismantled is carried upwards, and the installation of the pillars and the discharge of the dismantled materials are carried out in the pit. No work is required, and disassembly and assembly can be done efficiently. In addition, although the above-mentioned example explained the dismantling and removal work of the concrete inner wall part, it can also be applied to brickwork inspection of the blast furnace inner wall by replacing the tool.

In addition, as a driving means for advancing and retracting the support legs,
Not limited to those using hydraulic cylinders as mentioned above,
Any appropriate means can be used, such as by screwing a female screw into a screw shaft.

(Effects of the invention) As explained above, this invention fixes the inner wall dismantling means main body having the working means in the pit with support legs, and furthermore, since the support pads that contact the inner wall can face in any direction, the unevenness of the inner wall can be fixed. There is no need for support at the bottom of the pit, and the supporting force of the supporting legs can always be set to an optimum level.
Therefore, it is a relatively compact device that can efficiently dismantle and assemble the inner wall without requiring any work inside the pit.

[Brief explanation of the drawing]

Fig. 1 is an explanatory circuit diagram of a hydraulic cylinder and its control unit showing an embodiment of this invention, Fig. 2 is a cross-sectional front view of the setting state in a pit, and Fig. 3 is an example of the guide means for the support legs. FIG. 4 is a cross-sectional view of the tip of the support leg, and FIG. 5 is a cross-sectional view taken along the - line. 1...Inner wall, 2...Inner wall construction device main body, 10...
... Pit, 20... Support part, 31, 32, 33,
34...Hydraulic cylinder, 41, 42, 43, 44
...Support leg, 51, 53...Support pad, 60...
...Compression spring, 70...Shaft, 80,90...
Spherical bearing.

Claims (1)

[Scope of utility model registration request] An inner wall construction device disposed inside a cylindrical structure and having an inner wall dismantling means, comprising a plurality of support legs attached to the inner wall dismantling means body and protruding in the horizontal direction, and a tip end of the support legs. a support pad that is attached to the support pad and comes into contact with an inner wall; and a drive means that moves the support leg forward and backward; the support pad is attached to the tip of the support leg via a spherical bearing so that the direction can be changed. 1. An apparatus for constructing an inner wall of a cylindrical structure, characterized in that the support leg is supported by a spring so as to be oriented horizontally at the distal end of a support leg.