JPS6240278B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a hanging tool for a bushing for an electrical device such as a transformer, a reactor, a circuit breaker, etc. This invention relates to the improvement of a lifting device used to lift equipment with a lifting machine when it is attached to or removed from equipment.

[Prior art] Bushings used in transformers, reactors, circuit breakers, etc. can be several meters long, so the handling when installing and removing them from equipment is as follows:
It must be lifted using a lifting machine. The conventional hanging equipment used in this case is as shown in Figure 1.
A pair of main wire ropes 3 whose lower ends are attached to the hanging ears 2b of the flange 2a of the bushing 2 of the electrical equipment 1
The main part is 1 pair of main wire ropes 3
a rope lower part 3a whose lower end is attached to the hanging ear 2b and whose upper end is attached to the end of the horizontal beam 4;
It consists of a rope upper part 3b whose lower end is attached to the end of a horizontal beam 4 and whose upper end is hung on a hook 6 of a lifting machine (not shown), and the horizontal beam 4 is intended to keep the lifting height of the lifting machine as low as possible. be.
The hanging device further includes an auxiliary wire rope 5 having both ends 5a attached to the midpoint 3c of the lower rope portion 3a to form a U shape, and this auxiliary wire rope 5 supports the load in the direction of the fall of the bushing. .
A guide rope 7 is attached to the U-shaped central portion 5b of the auxiliary wire rope 5.

The specifications of the hanging tool are determined by examining the weight, center of gravity, dimensions, mounting angle, etc. of the bushing 2 in advance. After the guide rope 7 is tied to a hanging device on the floor surface 9 on which the electrical equipment 1 is installed, the upper end of the main wire rope 3 is hung on the hook 6 of a lifting machine such as a crane. Hoist hook 6 to a certain height,
Bushing 2 the lower end of the main wire rope 3 of the hanging device
Attach to the hanging ear 2b. While further hoisting the hanging device, the worker 8 on the floor 9 guides the auxiliary wire rope 5 using the guide rope 7 so that it can be attached between the top of the insulator tube 2c of the bushing 2 and the expansion chamber 2d. The guide rope 7 is attached to a predetermined position by a coordinated action between an operator of a lifting machine such as a crane and an operator of the guide rope 7. Thereafter, while gradually transferring the load of the bushing to the hanging tool, remove the bolts fixing the flange 2a of the bushing to the equipment 1, remove the bushing 2 from the electrical equipment 1 while lifting the bushing, and lower it onto the floor 9. was. Conventional hanging equipment has the above configuration,
Since it was used as described above, it had the following drawbacks.

(1) Since the location where the auxiliary wire rope 5 is attached is located at a high place, attaching the auxiliary wire rope requires a highly coordinated action between the operator of a lifting machine such as a crane and the operator of the guide rope, which makes it difficult to ensure reliability. , it was less safe.

(2) As the bushing installation angle becomes smaller, the operator of the guide rope 7 must be located farther away from the electrical equipment, and his position is dependent on surrounding obstacles.

(3) It took a long time to wear it.

[Summary of the invention]

This invention was made in view of the above-mentioned drawbacks of the conventional ones, and an object of the present invention is to provide a hanging device that is easy to operate, and can safely and reliably attach an auxiliary wire rope. The structure includes a T-beam for mounting and supporting the T-beam and a stretchable elastic rope attached to the other end of the T-beam for supporting the auxiliary wire rope. The auxiliary wire rope can be held substantially parallel to the flange of the bushing by means of the elastic rope, and the sling itself has the function of replacing the guide rope operator.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. As shown in FIG. 2, the main wire rope 3 and the auxiliary wire rope 5 of the hanging device are the same as the conventional ones shown in FIG. 1, so detailed explanations will be omitted. However, the horizontal beam 4' attached to the main wire rope 3 differs from the horizontal beam 4 in FIG. 1 in that a mounting portion 4a is provided in the center of FIG. In this invention, a T-shaped beam 10 is provided, and one end of the T-shaped beam 10, that is, the end 10a of the vertical bar of the T-shaped beam 10 is provided.
The T-beam 10 is supported by the horizontal beam 4' by connecting it to the mounting part 4a. The upper end of an elastic rope 11 such as a rubber string is attached to the other end of the T-shaped beam 10, that is, both ends 10b of the horizontal bar of the T. The elastic rope 11 has a lower end connected to the auxiliary wire rope 5, and a T
The shaped beam 10 and this elastic rope 11 make it possible to hold the auxiliary wire rope approximately parallel to the flange of the bushing. That is, the elastic rope 11 is made to have a length that can hold the auxiliary wire rope in the above state when only the weight of the auxiliary wire rope 5 acts on it (that is, when the auxiliary wire rope is unloaded). Therefore, when a load is applied to the auxiliary wire rope and its position is about to change, the elastic rope stretches due to its elasticity.

The lifting operation of the bushing is almost the same as that of the conventional hoist shown in Fig. 1, so to explain only the different parts, the upper end of the hoist (the upper end of the main wire rope) is hung on the hook 6, and the hoist , and attach the lower end of the hanging device, that is, the lower end of the main wire rope 3, to the hanging ear 2b of the bushing. When the hook is further wound up, the auxiliary wire rope 5 is held almost parallel to the flange 2a of the bushing by the T-shaped beam 10 and the elastic rope 11, so that it can be easily connected to the insulator of the bushing 2 without using the guide rope. It can be installed between the top of the expansion chamber 2c and the expansion chamber 2d.

Thereafter, while gradually transferring the load of the bushing to the hanging tool 3, remove the bolts that attach the flange 2a of the bushing to the electrical equipment 1, lift only the bushing, remove it from the electrical equipment, and place it on the floor 9. The procedure is the same as the conventional one shown in FIG. When lowering the bushing onto the floor, as shown in FIG. 3, another lifting device 6' and a wire rope 3' are required depending on the mechanical strength of the bushing. When the bushing 2 is laid down almost parallel to the floor surface 9, the auxiliary wire rope 5 receives the load of the bushing and is positioned almost vertically, as shown in FIG. 3, and the T-shaped beam 10
will remain horizontal, but the elastic rope 11
Because it can be expanded and lengthened due to its elasticity, there is no problem with this action.

Note that the T-shaped beam 10 requires several different lengths depending on the shape of the bushing and the angle of attachment to the electrical equipment. Instead of preparing several types with different lengths, as shown in FIG.
It can be done. The vertical bar portion is composed of two parts: a cylinder 10c and a rod 10d that fits into the cylinder, and the rod 10d is slid within the cylinder 10c to adjust the overall length, and the set screw 10e is used to adjust the overall length. It can be fixed and made to the required length.

〔Effect of the invention〕

According to the present invention, as described above, since the lifting device is constructed so as to eliminate the need for a guide rope, (1) a lifting device such as a crane and a highly coordinated operation that requires skill on the part of the operator of the guide rope are not required; You can attach the auxiliary wire rope without having to worry about it, allowing you to work confidently and safely.

(2) Operation is possible without being affected by surrounding obstacles.

(3) Installation time can be shortened.

(4) The input by the guide rope operator can be omitted.

There are other effects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional hanging tool for a bushing for electrical equipment in its used state, FIG. 2 is a perspective view showing an embodiment of the hanging tool for a bushing for electrical equipment according to the present invention in its used state, and FIG. The figure is a side view showing the state immediately before the bushing is lowered onto the floor, and FIG. 4 is a perspective view showing another embodiment of the T-shaped beam. 1... Electrical equipment, 2... Bushing, 2a...
Flange, 2b...Hanging ear, 2c...Insulator pipe, 2d
... Expansion chamber, 3 ... Main wire rope, 3a ... Rope lower part, 3b ... Rope top, 3c ... Middle point, 4, 4' ... Horizontal beam, 4a ... Attachment part, 5 ... Auxiliary wire Rope, 5a...Both ends, 5
b... Central part, 6... Hook, 7... Guide rope, 8... Operator, 9... Floor surface, 10, 10'...
...T-shaped beam, 10a...one end, 10b...other end, 10c...cylindrical body, 10d...rod body, 10e...
...Set screw, 11...Elastic rope. In addition, in each figure,
The same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. A pair of main wire ropes whose lower ends are attached to the hanging ears of the lower flange of the bushing, a horizontal beam is attached in the middle, and whose upper ends are hung on the lifting machine hook; A bushing sling comprising an auxiliary wire rope connected at both ends to the lower point of the horizontal beam and suspended between the top of the insulator tube of the bushing and the expansion chamber in a U-shape, the central part of the horizontal beam A T-shaped beam, one end of which is attached to 1. A hanging device for a butting for electrical equipment, comprising: a stretchable elastic rope; 2. The suspender for a bushing for electrical equipment according to claim 1, wherein the T-shaped beam is configured such that the length of the vertical bar portion of the T is variable.