JPH0730372B2 - Suspension device having horizontal expansion and contraction mechanism and dismantling installation method of large structure by the device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for suspending members used for dismantling and installing a large structure such as a blast furnace and a dismantling and installing method using the suspending device.

[0002]

2. Description of the Related Art Recently, regarding a construction method for a large structure and a work trolley, as described in, for example, Japanese Patent Publication No. 2-61522, a vehicle for traveling installed inside a blast furnace iron skin in order to shorten the construction period. There is a work method and a work method in which a work carriage is mounted on a beam, a blast furnace iron skin is mounted on the carriage by a lifting facility, and the blast furnace iron skin is installed at a predetermined position by freely moving the carriage.

According to the method disclosed in Japanese Patent Publication No. 2-61522, a traveling beam 25 is installed inside a blast furnace iron shell 17-1 as shown in FIG. It is fixed as shown in FIG. 2, and after adjusting the height and angle of the blast furnace iron skin 17, the work carriage 26 is run and the blast furnace iron skin 17 is installed at a predetermined position.

[0004]

[Problems to be Solved by the Invention] Japanese Patent Publication No. 2-61522
According to the method described in the publication, it is necessary to install the traveling beam 25 and the work carriage 26 inside the blast furnace iron skin 17, and further, as the installation work progresses, the traveling beam 25 and the work carriage 26 are sequentially moved upward. Since there is a need to relocate to, there is a drawback that it requires labor and time for dismantling and installation. Further, it is necessary to change the shape of the work carriage and the support structure of the members according to the shape of the installation member, which is also disadvantageous in that it is not versatile.

In order to solve the above drawbacks, an object of the present invention is to provide a suspension device having a horizontal expansion / contraction mechanism for the purpose of reducing the number of workers for dismantling and installation, shortening the working time, and versatility, and the suspension device. It is to provide a method for dismantling and installing a large structure.

[0006]

A suspending device according to the present invention is constructed such that an inner cylinder is provided inside an outer cylinder, a feeding mechanism for the inner cylinder and a drive device are built in, and the suspension device is horizontally expandable and contractable. A horizontal expansion / contraction mechanism characterized in that two arms are slidably connected to each other by a driving device, a hanging hook is provided at a tip of each inner cylinder, and an angle sensor for detecting an inclination of the arm and a control mechanism are provided on the arm. It is a suspension device having. As a feeding mechanism and a drive device for the inner cylinder, for example, a screw mechanism and an electric motor, or a hydraulic cylinder and a hydraulic drive device are incorporated. The two arms are connected to each other in a vertically slidable manner by a driving device via rollers, for example.
The combination of the outer cylinder and the inner cylinder may be double or triple and plural combinations. A method for dismantling and installing a large structure of the present invention is a method for dismantling and installing a large structure using a suspension device having the horizontal expansion / contraction mechanism, and in the case where the loading / unloading port of the member is narrow, the lifting / lowering is performed at the loading / unloading port passage position. A method for disassembling and installing a large structure by a suspension device having a horizontal telescopic mechanism, characterized in that the arm of the device is passed through in a contracted manner, and at the disassembly installation position, the arm of the suspension device is extended to lift the disassembly installation member. .

[0007]

Function: A lifting device having a horizontal expansion / contraction mechanism is hung by a lifting facility, and a counterweight or member is lifted by a lower arm. When the horizontal balance of the arm is lost and the arm is tilted, the angle sensor for detecting the tilt of the arm and the control mechanism sense the tilt of the upper arm to operate the electric motor, and the lower arm is slid to move the counterweight or member, Keep the lifting equipment level.

When the member is lifted by the upper arm, the horizontal balance of the suspension device is lost, so the angle sensor for detecting the tilt of the arm and the control mechanism actuate the electric motor.
Slide the lower arm to move the counterweight or member to keep the lifting device horizontal. When the upper arm is further extended, the control mechanism operates at any time, and the electric motor installed inside the lower arm extends the lower arm,
Move the counterweight or member to the proper position to keep the lifting equipment level.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a vertical cross-sectional view of the upper arm 12 of the suspension device having the horizontal expansion / contraction mechanism according to the present invention, showing the state in which the arm is extended.

As shown in FIG. 2, the inner cylinder 1, the middle cylinder 2, and the outer cylinder 3 constitute an arm 12. In order to extend and contract the inner cylinder 1, the female screw portion 4-1 is fixed to the inner cylinder 1, and the female screw portion 4-
The screw portion 5-1 is inserted into the screw 1 and the male screw portion 5-1 is rotated by the electric motor 6-1 fixed to the middle cylinder 2 to expand and contract the inner cylinder 1. Further, in order to expand and contract the middle cylinder 2, the female screw portion 4-2 is fixed to the inner cylinder 2, and the female screw portion 4-2 is screwed to the screw portion 5.
-2 is inserted, and the male screw portion 5-2 is rotated by the electric motor 6-2 fixed to the outer cylinder 3 to expand and contract the middle cylinder 2. Sliding members 7-1 to 7-1 are provided on the inner surfaces of the middle cylinder 2 and the outer cylinder 3, respectively.
2 (for example, roller bearings) are placed, and the inner cylinder 1
So that the middle cylinder 2 can slide smoothly. A hook 8 is provided at the tip of the inner cylinder 1, and a hanging fitting 9 is installed. The combination of the inner and outer cylinders may be a combination of the outer cylinder and the inner cylinder without the middle cylinder.

FIG. 1 shows an upper arm 12 and a lower arm 13.
FIG. 3 is a vertical cross-sectional view (the same figure (a)) and a right side view (the same figure (b)) showing a state in which is contracted. Bracket 10 provided on outer cylinder 3
A sliding member 7-13 is arranged on the upper arm 12 and the outer cylinder 3 are combined in a vertically symmetrical direction via the sliding member 7-13, and the upper arm 12 and the lower arm 13 are slid on each other as shown in FIG. In order to fix the lower arm 13, the screw portion 4-
The outer cylinder 3 of the upper arm 12 is inserted through the screw part 5-3.
Male screw part 5-3 by an electric motor 6-3 provided outside the
It has a structure to rotate.

A control device 11 incorporating an angle sensor and a control mechanism is mounted on the outer cylinder 3 of the upper arm 12.

First, the hoisting device of the present invention is hung by hoisting equipment, the counterweight 14 is hoisted by the lower arm 13, and the control device 11 senses the tilt of the upper arm 12 to drive the electric motor 6-3. Then, the lower arm 13 is slid to move the counterweight 14 to the position A so that the suspension device is kept horizontal. When a member is lifted by the upper arm 12, the suspension device loses balance, so the control device 11 operates the electric motor 6-3 to slide the lower arm 13 to move the counterweight 14 to the position B. , Keep the hanging device horizontal. Upper arm 1
When 2 is further extended, the control device 11 operates at any time, and the two electric motors 6- installed in the lower arm 13
The lower arm 13 is extended by 1, 6-2 and the counterweight 14 is moved to the position C to keep the suspension device horizontal.

Referring to FIG. 4, a method of using the suspension device will be described with reference to an example of blast furnace iron skin installation in blast furnace construction. The hanging device 16 is lifted by the outrigger 15, and instead of the counterweight, the blast furnace iron shells 17 and 18 having substantially the same weight are hung on both ends of the hanging device 16 and taken into the position I in a contracted state. Lower the installation height II of the blast furnace iron skins 17, 18 and extend it while keeping the suspension device 16 horizontal,
Horizontally move 18 to the installation position and install in place. When the installation is completed, the lifting device 16 is contracted and lifted to lift the next blast furnace iron shell, and the installation is sequentially performed. In the case of blast furnace dismantling, the work can be carried out in the reverse order of installation.

Another construction method using a suspension device will be described with reference to an example of installation of a hot-air annular pipe in blast furnace construction with reference to FIGS.
When assembling the hot-air annular tube 19 on the temporary deck 20, the hot-air annular tube member 21 is loaded and mounted on the carriage 22.
The counterweight 14 is hung at one end of the hanging device 16 lifted by the outrigger and moved to the inside of the turret 23, and the hanging device 16 is swung while maintaining balance while the hot air annular pipe member 21 is hung at the other end, Hot air annular pipe member 21
Can be arranged at a predetermined position, and the assembling work can be advanced in a narrow place between the temporary deck 20 and the girder 24. The hot-air annular tube member 21 may be suspended from the upper part of the girder 24 by the suspending device 16 without using the take-in carriage 22, and may be swung to arrange the hot-air annular tube member 21 at a predetermined position.

[0017]

EFFECTS OF THE INVENTION By the suspending device having the horizontal expansion and contraction mechanism of the present invention and the dismantling and installing method of a large structure by the device, a horizontal work of the dismantling member for installation does not require a work trolley and temporary equipment therefor Since there is no need to install and dismantle the equipment and two members can be disassembled or installed at the same time, it is possible to disassemble a large structure and shorten the installation period. In addition, since there is versatility that the suspension device can be used regardless of the shape of the installed dismantling member, there is an effect that it is economical.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view (FIG. 1 (a)) and a right side view (FIG. 1 (b)) of the entire suspension device of the present invention.

FIG. 2 is a vertical cross-sectional view of the upper arm of the lifting device of the present invention.

FIG. 3 is an overall elevational view for explaining the operation of the suspension device of the present invention.

FIG. 4 is a diagram showing a construction method example of blast furnace construction by the dismantling installation construction method of the present invention.

FIG. 5 is a diagram showing a construction method example of blast furnace construction by the dismantling installation construction method of the present invention.

FIG. 6 is a diagram showing an example of a blast furnace construction method by the dismantling and installing method of the present invention.

FIG. 7 is an explanatory view showing a conventional installation method.

[Explanation of symbols]

 1 Inner Cylinder 2 Middle Cylinder 3 Outer Cylinder 4 Female Threaded Part 5 Male Threaded Part 6 Electric Motor 7 Sliding Material 8 Hook 9 Hanging Metal Fitting 10 Bracket 11 Control Unit 12 Upper Arm 13 Lower Arm 14 Counterweight 15 Outrigger 16 Lifting Device 17 Blast Furnace Iron skin 18 Blast furnace iron skin 19 Hot-air annular pipe 20 Temporary deck 21 Hot-air annular pipe member 22 Intake cart 23 Turret 24 Cross beam 25 Traveling beam 26 Work cart

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ritsuji Kurashige 3-21, Nakamachi, Toshiba, Ube City, Yamaguchi Prefecture Kono Iron Works Co., Ltd.

Claims (2)

[Claims] 1. An inner cylinder is provided inside an outer cylinder, a feeding mechanism for the inner cylinder and a drive unit are built in, and two arm sets configured to be extendable and contractible in the horizontal direction are slidable with each other by the drive unit. A suspending device having a horizontal expansion / contraction mechanism, characterized in that a suspension hook is provided at the tip of each inner cylinder, and the arm is provided with an angle sensor for detecting the inclination of the arm and a control mechanism. 2. A method for disassembling and installing a large structure using a suspension device having a horizontal expansion / contraction mechanism according to claim 1, wherein when the loading / unloading port of the member is narrow, the arm of the lifting device is at the loading / unloading port passage position. A method for disassembling and installing a large structure by a hanging device having a horizontal expansion / contraction mechanism, characterized in that the arm of the hanging device is extended to lift the dismantling installation member at the dismantling installation position.