JPH0460063A - Disassembling device for cylindrical structure - Google Patents

Abstract

PURPOSE:To improve the workability by providing a stage at the middle section of a frame suspended at the upper end of a cylindrical structure, providing a circular scaffolding at the end section of the frame, and providing a rotary derrick suspending a nippler on the stage. CONSTITUTION:A worker on a stage 4 or a scaffolding 5 operates a nippler 8 to crush the portion at the upper end of a cylindrical structure 1 where a frame 2 is not mounted. A disassembling device is lifted with a moving frame 2, a derrick 6 is rotated, and the frame 2 is located at a crushed low position. The portion where the frame 2 was located and other crushable portions are crushed with the nippler 8. The similar work is repeated in sequence, and the structure 1 is crushed and disassembled from its upper end.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an apparatus for dismantling tall cylindrical structures such as concrete chimneys and towers.

(Conventional technology) Conventionally, when dismantling a chimney at a thermal power plant, for example, where construction machinery such as cranes cannot reach, workers climb to the tip of the chimney.
A dismantling method is adopted in which the material is gradually crushed starting from the tip using a hammer drill or other tool.

(Problems to be Solved by the Invention) In the above demolition method, there is no foothold for workers, so the work is dangerous, and the pieces of the shattered chimney are scattered outside the chimney, so they spread over a fairly large area around the chimney. There were disadvantages such as having to set up a restricted area and having poor work efficiency as the work was done manually.

An object of the present invention is to provide a device that is free from such inconveniences and can perform disassembly work safely and with good workability.

(Means for Solving the Problems) In the present invention, a frame is hung over the upper end of the cylindrical structure, and a stage is provided at the middle part of the frame to be suspended into the cylinder of the cylindrical structure, and at the end of the frame. The above object was achieved by providing an annular scaffold surrounding the outer periphery of the upper end of the cylindrical structure, and providing a rotating deck with a nipple hanging from the stage.

Preferably, the frame includes a movable frame that is movable vertically and horizontally in order to move the entire disassembly apparatus at the upper end of the cylindrical structure being dismantled.

(Function) Materials are carried up using a pulley or the like to the upper end of the cylindrical structure to be dismantled, such as a chimney, the frame and stage are assembled, a decker and a nipple are installed, and a scaffold is installed around the upper end of the cylindrical structure. Then, operate the nippler to crush the upper end of the part that is out of the frame. The fragments generated as a result are stopped by scaffolding or fall into the cylinder of the cylindrical structure,
It will not be scattered around in a disorderly manner. When a certain amount of crushing is completed, the frame is moved to the crushed area by operating the moving frame, and the area where the frame was previously located is crushed. By repeating this crushing and movement of the frame, the cylindrical structure can be gradually dismantled from its upper end quickly and without causing any danger to workers.

(Example) An example of the present invention will be explained based on the attached drawings. In Figs. 1 and 2, the symbol (1) indicates a chimney of a thermal power plant;
A cylindrical structure that is too high for a crane truck to reach, such as a tower, 2) indicates a frame composed of a plurality of structural members that are stretched across the upper end of the cylindrical structure (1). The frame (2
) is provided with a stage (4) suspended into the cylinder (3) of the cylindrical structure (1), and an end of the frame (2) protruding laterally from the cylindrical structure (1). The cylindrical construct (1
) is provided with an annular scaffold (5) surrounding the outer circumference of the upper end. The stage (4) is equipped with a double decker (6) of a fully rotating type whose arms protrude about 1 m to the sides of the cylindrical structure (1), and a hoist (A) is attached to both arms of the decker (6). I installed it so that the nipple (8) could be hung from it.

The stage (4) is provided with a distribution board (10) connected to electric wires drawn from below the cylindrical structure (1), and the hoist (7) and the like are connected through the distribution board (10). Nippler (8
) is supplied with power for driving the hydraulic unit (9). Further, a support (11) was erected around the outer periphery of the scaffold (5), and a net (12) was attached to this to prevent the scattering of debris generated during demolition.

The frame (2) is equipped with a hydraulic cylinder (14) as shown in the third diagram, which is movable vertically and horizontally, in order to move the entire dismantling device at the upper end of the cylindrical structure (1) being dismantled. A number of moving frames (13) are provided, and several moving frames (I3) are positioned at the upper end of the cylindrical structure (1) that has been crushed low by the nippler (8) to lift the entire demolition device, and until then The entire frame (2) that supported the demolition device was pivoted so that the portion where the frame (2) was located could be crushed.

To explain its operation, first, a worker on the stage (4) or scaffold (5) operates the nippler (8) to remove the part of the upper end of the cylindrical structure (1) where the frame (2) is not placed. Crush. Fragments generated by the crushing will not fall onto the scaffold (5) or into the cylinder (3) and will not be scattered around the cylindrical structure (1).

As shown in Fig. 4, when the area is crushed to an appropriate depth, the moving frame (13) is used to lift and rotate the entire demolition device, and the frame (2) is crushed. position it in a low place. Then, the portion where the frame (2) was located and other crushable portions are crushed with a nippler (8). By repeating these operations, the cylindrical structure (1) is gradually crushed and dismantled starting from its upper end.

(Effects of the Invention) As described above, in the present invention, a frame is hung over the upper end of the cylindrical structure, and a stage is suspended from the frame into the cylinder of the cylindrical structure, and a ring-shaped structure surrounding the outer periphery of the upper end of the cylindrical structure is attached to the frame. A scaffold was set up and a rotating deck was installed on the stage to suspend the nippler, allowing workers to work safely on the scaffold and preventing debris from falling onto the scaffold or into the cylinder and into the surrounding area during dismantling. It does not pose any danger and can be dismantled by mechanical work, so it has advantages such as good workability.

[Brief explanation of drawings]

1 is a cutaway side view of an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a perspective view of the main parts, and FIG. 4 is a perspective view of the main parts in an operating state. (1)...Cylindrical construct (2)...Frame (3)...Cylinder interior (4)...Stage (5)...Scaffolding (6)...Derecki (8)...・Nipler (13)...Moving quota application: 3 people other than Mitsui Construction Co., Ltd.

Claims (1)

[Claims] 1. A frame is hung over the upper end of the cylindrical structure, and a stage is provided in the middle of the frame to hang into the cylinder of the cylindrical structure. 1. A dismantling device for a cylindrical structure, characterized in that an annular scaffold surrounding the outer periphery of the upper end is provided, and a deck for suspending and rotating a nippler is provided on the stage. 2. The apparatus for dismantling a cylindrical structure according to claim 1, wherein the frame includes a movable frame that is movable vertically and horizontally.