JPH0413331Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a chimney demolition device that sequentially destroys old reinforced concrete chimneys from the top.

[Conventional technology]

Conventionally, the chimney demolition equipment described above includes a device frame that is fixed to the outer periphery of the top of the chimney to be demolished with a tightening band, and a device frame that is suspended above the device frame so as to be able to rotate horizontally, which is necessary for crushing the chimney wall. A rotating beam that is sequentially rotated through a wide range of angles by a drive device, an electric chain block that can run and move along the rotating beam, and a chain block that is suspended by the block chain. It is known that the chimney wall is equipped with a hydraulic crusher for crushing the chimney wall, and the chimney wall is sandwiched between the hydraulic crushers and successively crushed in the circumferential direction.

[Problem that the invention attempts to solve]

However, in the conventional chimney demolition equipment, the equipment frame is fixed to the outer periphery of the chimney with a tightening band, so the work is extremely difficult when lowering the entire equipment one after another in order to crush the smoke. The problem was that it was dangerous.

[Means for solving problems]

In order to solve the above-mentioned conventional problems, this invention has a central upright column 2 supported via a plurality of radial support legs 1 at the top end of the chimney A to be demolished, and a horizontally pivotable support at the top end of this column. a rotating beam 4 attached to the chimney wall a and sequentially rotated by a drive device 3 through an angular range necessary for crushing the chimney wall a;
It is equipped with a chain block 5 that can run and move along the swing beam 4 provided on the swing beam, and a hydraulic crusher 6 for crushing chimney walls suspended from the block chain 5a. In order to prevent the radial support feet 1 at the crusher crushing position from getting in the way when the chimney wall a is sequentially crushed in the circumferential direction, the multiple radial support feet 1 can be moved up and down on the lower end bracket 7 of the column. The structure is characterized in that the pipes are supported by pins, and can be successively raised one by one by a hydraulic cylinder 11, and successively lowered and supported to the chimney wall crushing position.

[Effect]

When the chimney wall a is sequentially crushed in the circumferential direction by the hydraulic crusher 6, the radial support legs 1 at the crusher crushing position are successively flipped up one by one by the hydraulic cylinder 11 and returned to the chimney wall crushing position. The operation of sequentially lowering and supporting is repeated.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings. This chimney demolition device is designed to sequentially destroy an old reinforced concrete chimney A from the top. A central upright column 2 is supported at the top end via six radial support legs 1, and a drive device 3 is attached to the upper end of this column so that it can rotate horizontally, and the angle range necessary for crushing the chimney wall a is controlled by a drive device 3. a rotating beam 4 that is sequentially rotated by the rotating beam 4; an electrically operated chain block 5 that is movable along the rotating beam 4;
The hydraulic crusher 6 is equipped with an opening/closing scissors 6a for crushing the chimney wall, which is suspended from the pipe a.

The rotational drive device 3 for the rotating beam 4 includes an electric motor M with a reducer attached to a fixed support base, and a pinion 13 attached to the output shaft of the reducer of the electric motor M, and the pinion 13 is attached to the rotating beam 4. By meshing with an annular rack 14 and controlling the operation of the electric motor M appropriately by an operator, the rotating beam 4 can be horizontally rotated sequentially in one direction in an angular range necessary for crushing the chimney wall. ing.

In addition, when the above-mentioned six radial support legs 1 are fixed to the support column 2, when the chimney wall a is sequentially crushed in the circumferential direction by the hydraulic crusher 6, the crusher crushing part Since the supporting feet 1 in the position become an obstacle and the crusher 6 cannot crush the part of the chimney wall a on which the feet are placed, in the case of this invention, each radial supporting foot 1 is placed in the support post 2.
Upper and lower parallel link members 8 and 9 are supported by pins on the lower end bracket 7 so as to be movable up and down, and an add-on type chimney support 10 is supported by pins at the tips of these parallel link members (according to changes in the diameter of the chimney A). When the hydraulic crusher 6 sequentially crushes the chimney wall a in the circumferential direction, the crusher crushing position radiates. The support legs 1 are successively raised one by one by a hydraulic cylinder 11, and then lowered and supported one after another at the chimney wall crushing position as shown by imaginary lines in FIG.

In addition, each hydraulic cylinder 11 for raising and lowering the support leg
is provided for each radial support leg 1, and the cylinder end is connected to the pin support of the upper link member 8 of the lower end bracket of the column so that it is arranged diagonally with respect to the pin support of the parallel link members 8 and 9. The piston rod end is pivoted to the pin support position of the lower link member 9 of the chimney support 10. Therefore, by blocking each hydraulic cylinder 11 in the diagonally extended state shown on the left side of FIG. 1, deformation of the parallel links is prevented and each radial support leg 1 is blocked.
By contracting the cylinder 11, the radiation support leg 1 at the crusher crushing position can be flipped up as shown on the right side of FIG. By extending the cylinder 11 again in this state, it is possible to support the flip-up support leg 1 downward as shown by the imaginary line in FIG. 1 with respect to the chimney wall crushing position. In this case, the chimney support 10 at the tip of the link is raised and lowered while maintaining its horizontal position by the link action of the link members 8 and 9.

Reference numeral 15 shown in FIG. 1 is a suspension wire for reinforcing the beam stretched between the upper end rotation joint 16 of the protruding column 2a and the tip of the beam, and 17 also serves as a balance weight installed at one end of the beam 4. 18 is a work platform that can be lowered sequentially in response to the smoke breaking.

The chimney breaking device of the present invention configured as described above moves the chain block 5 in accordance with the diameter of the upper end of the chimney A to be crushed, and the hydraulic crusher 6 suspended by the broken chain 5a.
Lower the opening/closing scissors 6a to the chimney wall crushing position.
The chimney wall a is crushed by sandwiching the chimney wall a. In this case, the concrete-embedded reinforcing bars (not shown) in the chimney wall a are cut by the opening/closing scissors 6a of the hydraulic crusher 6, but if there are reinforcing bars (vertical bars, etc.) that cannot be cut by this, An operator sequentially cuts the pieces using a cutting jig.

The crushing of the chimney wall a by the hydraulic crusher 6 as described above is carried out sequentially in the circumferential direction of the chimney A by rotating the rotating beam 4 in a desired angle range. In this case, the radial support foot 1 at the crusher crushing position is connected to the hydraulic cylinder 11.
Immediately after the crusher 6 crushes the chimney wall, they are successively lowered and supported at the chimney wall crushing position as shown in the imaginary line in FIG. Therefore, by repeating this operation, the aged chimney A made of reinforced concrete can be sequentially crushed and dismantled starting from the upper end.

Incidentally, in the above embodiment, each radial support leg 1 is composed of the link members 8, 9 and the chimney support 10, but each radiant support leg 1 is composed of one real support leg, and this one real support leg It is also possible to modify the base end to be supported by a pin on the support lower end bracket 7 so as to be movable up and down, and to be able to be raised and lowered by a hydraulic cylinder 11 arranged at an angle.

[Effect of idea]

Since the chimney demolition device of this invention is equipped with the elevating and lowering type radial support legs 1 as described above, when the chimney wall a is crushed in the circumferential direction by the hydraulic crusher 6, the chimney wall crushing position is supporting leg 1
By using the hydraulic cylinder 11 to raise the smoke stack one by one and lowering them to the chimney wall breaking position, the entire device can be lowered one by one in response to the smoke breaking. The effect is that the old chimney A made of reinforced concrete can be dismantled safely and with good workability without requiring extremely difficult and dangerous equipment lowering work.

[Brief explanation of the drawing]

FIG. 1 is a main view showing the chimney dismantling device of the present invention in use (with the chimney partially dismantled), and FIG. 2 is a plan view of the same dismantling device. A... Chimney to be demolished, a... Chimney wall, 1...
Radial support leg, 2... Central upright column, 3... Beam drive device, 4... Swivel beam, 5... Chain block, 5a... Block chain, 6... Hydraulic crusher, 7... Support lower end bracket, 8 ，
9...Parallel link member, 10...Additional type chimney support, 10a...Support leg extension block, 11...
...Hydraulic cylinder for raising and lowering the support leg, 17...Hydraulic control device.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A chimney demolition device that sequentially destroys an old reinforced concrete chimney from the top, which includes an upright support installed at the center of the top of the chimney to be demolished; A plurality of radial support legs are pin-supported on the lower end bracket of the upright column so as to be movable up and down, and support the column at the top end of the chimney; A plurality of hydraulic cylinders that flip up and rotate in a predetermined order and a plurality of hydraulic cylinders that rotate downward in a predetermined order, and are attached to the upper end of the pillar so as to be able to rotate horizontally, sequentially move the angle range necessary for breaking the crusher of the chimney wall by a drive device. A chimney comprising a rotating swing beam, a chain block provided on the swing beam that can run and move along the swing beam, and a hydraulic crusher for crushing chimney walls suspended from the block chain. demolition equipment. (2) Each of the radial support legs is composed of upper and lower parallel link members supported by a pin to be movable up and down on the lower end bracket of the column, and an additional type chimney support supported by a pin at the tip of the parallel link member. The chimney according to claim 1 of the utility model registration claim, characterized in that a hydraulic cylinder for raising and lowering the support legs is pivotally supported diagonally at the pin branch position of the parallel link member of each support leg. demolition equipment.