CN202210666U - A tool for fastening U-shaped bolts of line suspension clamps with electricity - Google Patents

Abstract

The utility model discloses a tool for live tightening of a U-bolt of a wire suspension clamp, comprising an operating rod and a ratchet socket wrench; wherein the operating rod is made of insulating material, and one end of the operating rod is rotatably connected to a handle of the ratchet socket wrench. The utility model solves the problem of lack of corresponding live operating tools when live tightening of a wire suspension clamp U-bolt is performed at ground potential. The insulating operating rod ensures a safe distance between the staff and the live body, and the rotatable connection between the operating rod and the ratchet socket wrench facilitates the operation of tightening or disassembling the wire clamp U-bolt, thereby reducing the time consumption, manpower and material resources in the entire operation process and improving work efficiency.

Description

A tool for fastening U-shaped bolts of line suspension clamps with electricity

technical field

The utility model relates to the technical field of live work in power supply and distribution lines, in particular to a tool for live fastening a U-shaped bolt of a wire suspension clamp.

Background technique

The transmission line is an important part of the power grid. During its operation, due to the influence of strong winds and other natural environments or external forces, it is common for the U-shaped bolts of the wire suspension clamp to loosen. If such defects cannot be dealt with in time, Over time, the wire suspension clamp will become loose, and even fall off, resulting in a major accident in which the wire is dropped. At present, eliminating such defects requires a combination of equipotential and ground potential. During the operation, the required operating tools include: insulating load-bearing tools, insulating operating rods, insulating safety ropes, insulating ladders, insulating pulleys, and pin pullers. , shielding suit, fastening wrench, insulating rope; 8 operators are required, and the division of labor is: 1 person in charge, 3 ground potential electricians, 1 equipotential electrician, and 3 ground electricians.

The job steps are:

a) The person in charge of the work reads out the work ticket, and explains to the staff the dangerous points and safety measures during the operation;

b) After the equipotential electrician wears a full set of shielding suits, he climbs to the working position with 3 ground potential electricians;

c) Under the command of the person in charge of the work, the ground electrician arranges the working tools such as insulating load-bearing tools and insulating ladders in an orderly manner;

d) The ground potential electrician at the cross arm hangs the insulating pulley and insulating rope;

e) The ground electrician sends the insulation load-bearing tool and the insulation operating rod to the electrician at the ground potential at the cross arm through the insulating rope, and sends the pin puller and the insulation ladder to the electrician at the ground potential at the tower body;

f) 2 ground potential electricians at the crossarm use the insulation load-bearing tool to transfer the wire by gravity;

g) 3 ground potential electricians on the tower cooperate with each other to lower the wire to a position that meets the minimum safe distance between the charged body and the grounded body in live work (the height of the drop is about 20cm);

h) After the tower body is at ground potential, the electrician fixes the insulation ladder, assists the equipotential electrician to enter the electric field along the insulation ladder, reaches the wire suspension clamp, and tightens the loose bolts with a tightening wrench;

i) After tightening the bolts, the equipotential electrician returns to the tower body, removes all working tools with the ground potential electrician, and transmits them to the ground with insulating ropes. After the personnel go down the tower, the work is completed, and the work is summarized and recorded.

In actual operation, the operation time of the above method is generally as long as about 60 minutes, and the work efficiency is very low. At the same time, more manpower and material resources are needed in the operation process, and the cost is higher.

If the ground potential method can be used, the staff can be reduced to 4 people, including 1 person in charge, 2 ground potential electricians, and 1 ground electrician; only need to develop corresponding live working tools to cooperate with insulation Rope and insulation pulley to complete the fastening of the U-shaped bolts of the line suspension clamp.

The job steps are:

a) The person in charge of the work reads out the work ticket, and explains to the staff the dangerous points and safety measures during the operation;

b) Two ground potential electricians ascend the tower to the working position respectively;

c) The ground electrician discharges live working tools and insulating ropes in an orderly manner under the command of the person in charge of the work;

d) The ground potential electrician at the cross arm hangs the insulating pulley and insulating rope;

e) The ground electrician transmits the live working tool to the electrician at the ground potential of the tower through the insulating rope;

f) 2 electricians with ground potential on the tower cooperate with each other to fasten the bolts with new live working tools;

g) After retightening the bolts, the electrician on the tower will transfer the tools to the ground, and the personnel will go down the tower. After the work is completed, the work summary and records will be done.

Although the operation time of the ground potential operation method in the above steps can be reduced to about 20 minutes, which greatly improves the work efficiency and reduces the cost of manpower and physics, but it is still necessary to develop corresponding live working tools before it can be implemented in practical applications. .

Contents of the invention

Aiming at the deficiencies of the prior art, the utility model proposes a tool which can realize the ground potential operation and fasten the U-shaped bolts of the line suspension clamp with electricity.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a tool for fastening the U-bolt of the line suspension clamp with electricity, which includes an operating rod and a ratchet socket wrench; wherein, the operating rod is made of insulating material, and its One end turns to connect the handle of the ratchet socket wrench.

As an improvement, in the utility model, a connecting piece is used to realize the rotational connection between the insulating operating rod and the ratchet sleeve wrench; one end of the connecting piece is movably connected to one end of the operating rod, and the other end of the connecting piece is rotatably connected to the ratchet sleeve The handle of the wrench. Preferably, the connecting piece is threadedly connected to the end of the operating rod; the connecting piece is connected to the handle of the ratchet socket wrench through a pin shaft. The connecting piece can be processed by the process method in the prior art.

As an improvement, the end of the operating rod is provided with a connecting head made of metal, and threads adapted to each other are provided inside the connecting head and on the connecting piece. Specifically, because the operating lever is made of insulating materials such as epoxy resin, it is difficult to connect it with a metal connector or a handle of a ratchet wrench usually made of stainless steel. The above-mentioned problem is solved by adopting the connecting head and the connecting piece having the same diameter as the operating rod to connect. The material of the connector should be made of a high-strength material, preferably duralumin, and its length should not exceed 100mm, and it is best to process the ends and edges into arc shapes.

Preferably, the operating rod described in the present invention is a hollow rod filled with foam. Because the operating rod needs to ensure a safe distance between the operator and the charged body, it needs to pass the penetration test, power frequency withstand voltage test, wet insulation performance test, insulation resistance performance test, and mechanical performance test before it can be selected. The type of operating rod can be a solid rod, a hollow tube, or a hollow rod filled with foam. The material density should not be lower than 1.75g/cm ³ , and the water absorption rate should not be greater than 0.3%. It is preferably made of epoxy resin material, with a diameter of 28mm , A hollow rod with a wall thickness of 2.5mm, filled with foam to bond the inner wall of the hollow rod.

The total length of the insulating operating rod is determined by the sum of the shortest effective insulating length, the length of the end metal joint and the length of the hand-held part. The length requirements of each part refer to Table 1:

Table 1: Length requirements of each part of the operating rod

Taking 220kV as an example, considering the tower structure, on the premise that the length of each item meets the requirements, the length of the insulating operating rod is taken as 3.5m.

In the power frequency withstand voltage test, the insulating material of the insulating rod is subjected to a 1min power frequency withstand voltage test of a 300mm sample; in the wet insulation performance test, the insulating material of the insulating rod is subjected to a 1h rain test of a 1200mm sample. Under 100 kV power frequency voltage, it should meet the requirements of no flashover, no breakdown, no visible leakage corrosion marks on the surface, and no detectable temperature rise; in the insulation endurance test, the insulating operating rod should be able to withstand a distance of 300mm 1min power frequency voltage test between the two electrodes, the test product has no flashover, no breakdown, no visible leakage corrosion marks on the surface, no detectable temperature rise under 100kV power frequency voltage; in addition, the insulating operating rod should have Certain mechanical bending and torsion resistance, extrusion resistance, and mechanical aging resistance. After 4000 bending cycles, when visually inspected without the aid of a magnifying device, the test product should have no trace of damage, nor should it be damaged. without any permanent deformation.

The connecting piece described in the utility model can adopt the screw rod in the prior art, utilize the existing technological means to carry out reformation, also can directly utilize the existing technological means to process. Preferably, the length of the threaded portion at one end of the connector is 4.5 cm, and a pin hole is set on the other end, and a corresponding pin hole is also set on the handle of the ratchet socket wrench, and the pin is used to connect the two. The rotary connection can be realized. In order to facilitate the installation and connection of the connecting piece, it is preferable to arrange a nut in the middle of the connecting piece.

The ratchet socket wrench described in the utility model can be selected from the existing ratchet socket wrench, and can also be processed by using the existing technology. The handle is embedded in the tail of the sleeve to form a rotational connection with the sleeve. The handle turns to adjust to the desired angle, then secures.

Generally, the torque when disassembling the nut manually is 10000N cm, and the thrust of the person is 250N, so the handle length of the ratchet socket wrench is L=10000/250=40cm. Considering that the screw rod of the wire clamp U-bolt is generally longer, the length of the sleeve is preferably 10 cm.

The utility model solves the problem of the lack of corresponding live operating tools when using the ground potential to operate the U-shaped bolts of the hanging wire clips for fastening the live wires. The insulating operating rod ensures the safe distance between the staff and the charged body. The rotating connection of the ratchet socket wrench facilitates the operation of tightening or dismounting the U-bolt of the wire clamp, reduces the time consumption, manpower and material resources in the whole operation process, and improves work efficiency.

Description of drawings

Shown in Fig. 1 is the structural representation of the utility model.

Detailed ways

In order to make the content of the present utility model more obvious and understandable, further description will be made below in conjunction with the accompanying drawings and specific embodiments.

With reference to Fig. 1, a kind of preferred embodiment of the present utility model comprises insulation operating lever 1 and ratchet socket wrench 2, connects between the two through connector 3; One end of insulating operating lever is provided with connector 11, and connects The threaded connection between the head 11 and the connecting piece 3; the rotational connection between the connecting piece 3 and the handle 22 of the ratchet socket wrench 2 is realized through the pin shaft 4, specifically, the end of the connecting piece 3 is processed into a sheet shape embedded in the handle 22 At the end, the parts where the two overlap with each other are provided with a pin hole, and the pin 4 can be inserted into the pin hole to get final product. In addition, in order to facilitate the installation of the connecting piece 3, a nut is provided in the middle of the connecting piece 3. the

In this embodiment, the insulating operating rod 1 is made of epoxy resin material, with a diameter of 28mm and a wall thickness of 2.5mm. When the voltage level is 220KV, the total length of the operating rod is 3.5m, including the end connector 11. The connector 11 is made of duralumin, which is rod-shaped with the same inner diameter and wall thickness as the operating rod 1, and the inner wall is provided with a screw thread adapted to the thread at the end of the connector 3; the length of the connector 11 is 60 mm. The thread length provided on the connecting piece 3 is 45mm, and the type of the nut 4 matches the size of the threaded rod part of the connecting piece. The length of the handle 22 of the ratchet socket wrench is 0.4m, the length of the sleeve 21 is 0.1m, and the afterbody of the sleeve 21 is connected with the handle 22 in rotation.

The specific implementation cases described in the utility model are only preferred implementation examples of the utility model, and are not used to limit the implementation scope of the utility model. That is, all equivalent changes and modifications made according to the content of the patent scope of the utility model should be regarded as the technical category of the utility model.

Claims (10)

1. the instrument of charged fastening circuit suspension clamp U-bolt is characterized in that, comprises action bars and box socket set; Wherein, action bars adopts insulating material to process, the be rotationally connected handle of box socket set of one of which end.

2. the instrument of charged fastening circuit suspension clamp U-bolt according to claim 1 is characterized in that, also comprises connector; One end of connector flexibly connects an end of action bars, the be rotationally connected handle of box socket set of the other end of connector.

3. the instrument of charged fastening circuit suspension clamp U-bolt according to claim 2 is characterized in that, between the end of said connector and action bars for being threaded.

4. the instrument of charged fastening circuit suspension clamp U-bolt according to claim 2 is characterized in that, is connected through bearing pin between the handle of said connector and box socket set.

5. the instrument of charged fastening circuit suspension clamp U-bolt according to claim 3 is characterized in that the end of said action bars is provided with metal connector, and connector inside and connector are provided with coadapted screw thread.

6. according to the instrument of each described charged fastening circuit suspension clamp U-bolt of claim 1 to 5, it is characterized in that said action bars is a hollow stem, its inner filled and process.

7. the instrument of charged fastening circuit suspension clamp U-bolt according to claim 5 is characterized in that, the length that screw thread is set on the said connector is 4.5cm.

8. according to the instrument of claim 3 or 5 or 7 described charged fastening circuit suspension clamp U-bolts, it is characterized in that the middle part of said connector is provided with nut.

9. the instrument of charged fastening circuit suspension clamp U-bolt according to claim 1 is characterized in that, between the handle of said box socket set and the sleeve for being rotationally connected.

10. the instrument of charged fastening circuit suspension clamp U-bolt according to claim 9 is characterized in that, the length sleeve of said box socket set is 10cm.

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