CN210779825U - Device for replacing the entire string of tensile insulators at the cross arm end and wire end of DC transmission lines - Google Patents

Abstract

The utility model discloses a device for replacing the entire string of tensile insulators at the cross arm end and the wire end of a direct current transmission line, and aims to provide a device that can improve work efficiency. It includes a cross arm end support and a wire end support; the cross arm end support includes a first support body, a first pulley, and two first diagonal braces; the first support body includes an H-shaped first body, The connecting parts connected to the upper ends of both sides of the first body, two first support plates arranged vertically and symmetrically fixed to the upper ends of the connecting parts, and a plurality of first reinforcing bolts connecting the two first support plates; Both sides of the lower end are provided with first support parts extending to the outside thereof, and the first support parts are provided with first bolts for connecting the clamps at the cross arm end of the wire tower; the first pulley is located between the two first support plates and It is connected with the two first support plates through the first rotating shaft; the two first diagonal braces are respectively located on both sides of the two sides of the first body, and are respectively connected with the two sides of the connecting part through the first screw rod.

Description

Device for replacing the entire string of tensile insulators at the cross arm end and wire end of DC transmission lines

technical field

The utility model relates to the technical field of power grid maintenance tools, in particular to a device for replacing the entire string of tensile insulators at the cross arm end and the wire end of a DC transmission line.

Background technique

With the rapid development of the power industry, long-distance and large-capacity DC transmission technology has become the frontier technology of the power grid. At present, a number of DC ultra-high voltage transmission lines have been officially put into operation. In the daily operation and maintenance process, the self-explosion of glass insulators and the zero value of porcelain insulators are relatively common defects. However, due to the particularity of the zinc ring of DC line insulators, it is difficult to arrange power outages for DC transmission lines.

Although there are conventional fixtures for tool replacement, in the actual process, there are still shortcomings such as high labor intensity for operators, many demands for operators, and high requirements for the skill level of operators. In order to meet the needs of the development of live work on HVDC transmission lines , in view of the characteristics of high-voltage direct current transmission line tensile insulators and the "one-piece replacement fixture for the entire string of ±500kV transmission line tensile insulators" disclosed in Chinese Patent Publication No. 209526429U. It is very necessary to design a set of auxiliary tools for its supporting tools.

The main reason is that when ground potential operators and equipotential operators work at heights, the following conditions exist:

(1) The ground potential operator needs to lean over to release the first piece of the old insulator string when working at heights; (2) The ground potential operator needs to lean over to install the first piece of the new insulator string when working at high altitude; (3) Equipotential When working at heights, operators need to lean over to release the last piece of the old insulator string; (4) Equipotential operators need to lean over to install the last piece of new insulator strings when working at heights.

In the above working conditions, due to the low installation height of the original lifting block, the operator needs to lean over to lift and move. The weight of the 500kV whole string of insulators is about 1000kg. Even if there is a bottle holder, a single person can lift the insulator at high altitude. Stringing the first and last pieces is also more laborious, and the work intensity is greater. It greatly affects the efficiency of the entire insulator replacement work, and the replacement operation takes a long time.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and to provide a device for replacing the entire string of tensile insulators at the cross-arm end and the wire end of a DC transmission line that can improve the replacement efficiency.

In order to solve the above-mentioned technical problems, the utility model is realized through the following technical solutions:

The device for replacing the entire string of tensile insulators at the cross-arm end and the wire end of the DC transmission line, including the cross-arm end bracket connected to the cross-arm end clamp of the tower in use, and the wire end connected to the wire tower wire end clamp when in use. bracket; the cross arm end bracket includes a first bracket body, a first pulley, and two first diagonal braces; the first bracket body includes an H-shaped first body connected to the connecting parts on the upper ends of both sides of the first body , two vertically arranged and symmetrically fixed first support plates on the upper end of the connecting portion, and a plurality of first reinforcing bolts connecting the two first support plates; the lower end of the first body is provided with first extending toward the outside on both sides A support part, the first support part is provided with a first bolt for connecting the cross arm end clamp of the pylon; the first pulley is located between the two first support plates and passes through the first shaft and the two first support plates connection; the two first diagonal braces are located on both sides of the first body respectively, and are respectively connected with both sides of the connecting part through the first screw rod; the lower end of the first diagonal brace is provided with a connecting wire tower cross arm end card the second bolt of the tool;

The wire end bracket includes a second bracket body, a second pulley, and two second diagonal braces; the second bracket body includes a strip-shaped second body, two vertically arranged and symmetrically fixed to the upper end of the second body The second support plate, and a plurality of second reinforcement bolts connecting the two second support plates; the lower end of the second body is provided with second support parts extending to the outside on both sides, and the second support parts are provided on the second support parts for the third bolt connecting the wire end fixture of the tower; the second pulley is located between the two second support plates and is connected with the two second support plates through the second shaft; the two second diagonal braces are located on the second body respectively The two sides of the two sides are respectively connected with the two sides of the second connecting part through the second screw rod; the lower end of the first diagonal brace is provided with the fourth bolt connecting the cross arm end clamp of the wire tower;

Preferably, the cross arm end bracket further includes a first rib connecting the first body and the first support portion.

Preferably, the wire end bracket further includes a second rib connecting the second body and the second support portion.

Preferably, the second body is provided with a weight reduction hole.

Preferably, the first body, the connecting portion and the first support plate are one piece.

Preferably, the second body and the second support plate are one piece.

Compared with the prior art, the utility model has the following advantages:

The utility model can greatly improve the efficiency of replacing the entire string of tension insulators in the existing direct current transmission line, simplify the operation steps, reduce the operation time for replacing the entire string of tension insulators, and reduce the operation risk of the power grid.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the structural schematic diagram of the cross arm end support in the utility model.

FIG. 2 is a left side view of FIG. 1 .

FIG. 3 is a schematic view of the structure of the wire end bracket in the present invention.

FIG. 4 is a left side view of FIG. 1 .

FIG. 5 is a schematic diagram of the connection between the cross arm end bracket and the existing wire tower cross arm end fixture.

FIG. 6 is a schematic diagram of the connection between the wire end bracket and the existing wire tower wire end fixture.

FIG. 7 is a perspective view of the cross arm end bracket.

Figure 8 is a perspective view of the lead end bracket.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. In the following description, in order to clearly show the structure and working mode of the present invention, the drawings will be used as a reference to describe with the help of many directional words, but "front", "rear", "left" and "right" should be used for description. , "上", "下" and other words are understood as convenient terms, and should not be understood as limiting words.

As shown in Figure 1-8, the device for replacing the entire series of tensile insulators at the cross-arm end and the wire end of the DC transmission line includes the cross-arm end bracket connected to the cross-arm end clamp 30 of the wire tower in use, and the wire tower wire in use. The wire end bracket connected by the end clamp 40; the cross arm end bracket includes a first bracket body 1, a first pulley 2, and two first diagonal braces 3; the first bracket body 1 includes an H-shaped first The main body 4, the connecting parts 5 connected to the upper ends of both sides of the first main body 4, the two first support plates 6 arranged vertically and symmetrically fixed to the upper ends of the connecting parts 5, and the two first reinforcing plates 6 connecting the two first support plates 6 Bolts 7, the two first reinforcing bolts 7 in this embodiment are located at two opposite distal ends of the first support plate 6; first support parts 8 extending to the outside are provided on both sides of the lower end of the first body 4, and the first The support portion 8 is provided with a first bolt 9 for connecting the cross arm end clamp 30 of the pylon; the first pulley 2 is located between the two first support plates 6 and passes through the first shaft 10 and the two first support plates 6 connection; the two first diagonal braces 3 are located on both sides of the first body 4 respectively, and are respectively connected with both sides of the connecting part 5 through the first screw 11, and the first diagonal bracing angle can be realized by loosening the first screw Adjustment; the lower end of the first diagonal brace 3 is provided with the second bolt 12 connecting the cross arm end clamp 30 of the line tower;

The wire end bracket includes a second bracket body 13, a second pulley 14, and two second diagonal braces 15; the second bracket body 13 includes a strip-shaped second body 16, two vertically arranged and symmetrically connected A second support plate 17 on the upper end of the second body 16, and two second reinforcement bolts 18 connecting the two second support plates 17. In this embodiment, the two second reinforcement bolts 7 are located at two opposite ends of the second support plate. ; Both sides of the lower end of the second body 16 are provided with a second support portion 19 extending to the outside thereof, and the second support portion 19 is provided with a third bolt 20 for connecting the wire tower wire end fixture 40; The two pulleys 14 are located between the two second support plates 17 and are connected to the two second support plates 17 through the second shaft 21 ; the two second diagonal braces 15 are located on both sides of the second body 16 The two screws 22 are connected with both sides of the second connecting part 5; the lower end of the first diagonal brace 3 is provided with a fourth bolt 24 connecting the cross arm end clamp 40 of the wire tower;

In this embodiment, the cross arm end bracket further includes a first rib plate 25 connecting the first body 4 and the first support portion 8 to strengthen the connection strength of the first body 4 and the first support portion 8 . The wire end bracket further includes a second rib 26 connecting the second body 16 and the second support portion 19 . In order to strengthen the connection strength of the second body 16 and the second support portion 19 .

In this embodiment, the second body 16 is provided with a weight-reducing hole 23 to reduce its own weight and facilitate operation and use.

In this embodiment, the first body 4 , the connecting portion 5 and the first support plate 6 are integrally formed as one piece. The second body 16 and the second support plate 17 are integrally formed integral parts.

When the utility model is used, the wire end bracket and the cross arm end bracket are installed on the existing clamps. During the process of replacing the whole string of insulators, the insulator can be hoisted through the wire end bracket and the cross arm end bracket, and the operator does not need to The insulator can be bent over without pulling the entire string of insulators. The ground electrician can lift the insulator to the installation position, which greatly reduces the labor intensity and technical difficulty of the operator. The utility model can also reduce the tools carried by the equipotential personnel and the intermediate potential personnel before entering the potential, thereby reducing labor intensity.

The lifting operation process of the whole string of old insulators to be replaced is as follows. After the wire end bracket and the cross arm end bracket are firmly installed and the insulating rope is installed, they are tied to the second insulator on the wire side and the cross arm side respectively. Take off and take off, under the control of the insulating rope on the cross arm end bracket, cooperate with the insulating bottle holder to make the whole string of insulators slowly change from the horizontal state to the natural sagging state. Then take out the R pin of the insulator on the cross arm side, and lift the whole string of insulators slightly under the force of the insulating rope of the cross arm side bracket until the insulator and the ball head hanging ring are not stressed, and then withdraw the whole string of insulators. At this time, the cross arm side and the wire side bracket insulation rope are simultaneously stressed, so that the entire string of insulators can be smoothly placed on the ground.

The lifting operation process of the whole string of insulators to be replaced is as follows. The cross arm end bracket and the wire end bracket insulation rope are stressed at the same time, so that the whole string of insulators can be smoothly lifted to the installation position. The side of the entire string of cross-arms is raised to 3-5 cm above the installation position, which will greatly facilitate the connection of the entire string of insulators to the ball-head hanging ring on the side of the cross-arm, and the installation of R pins. Then restore the entire string of insulators to the natural sagging state, and use the insulating bottle holder and the insulating rope of the wire end bracket to pull the entire string of insulators to the installation position of the wire end. Install M pin.

If the cross arm end bracket and the wire end bracket are used together as a transmission tool, a non-polar insulating rope can be installed on the first pulley and the second pulley.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. For those skilled in the art, any modifications, equivalent replacements and improvements made to the technical solutions or part of the technical features described in the above-mentioned specific embodiments within the spirit and principles of the present invention shall include within the scope of protection of the present invention.

Claims (6)

1. Direct current transmission line cross arm end and the whole device that changes of conductor end strain insulator cluster, its characterized in that: the device comprises a cross arm end bracket connected with a wire tower cross arm end clamp in use and a wire end bracket connected with the wire tower wire end clamp in use; the cross arm end support comprises a first support body, a first pulley and two first inclined struts; the first support body comprises an H-shaped first body, connecting parts connected to the upper ends of two sides of the first body, two first support plates which are vertically arranged and symmetrically fixedly connected to the upper ends of the connecting parts, and a plurality of first reinforcing bolts for connecting the two first support plates; two sides of the lower end of the first body are provided with first supporting parts extending towards the outer side of the first body, and the first supporting parts are provided with first bolts used for connecting clamps at the cross arm ends of the line tower; the first pulley is positioned between the two first supporting plates and is connected with the two first supporting plates through a first rotating shaft; the two first inclined struts are respectively positioned on two sides of the first body and are respectively connected with two sides of the connecting part through first screw rods; the lower end of the first inclined strut is provided with a second bolt connected with a line tower cross arm end clamp;

the wire end bracket comprises a second bracket body, a second pulley and two second inclined struts; the second support body comprises a strip-shaped second body, two second support plates which are vertically arranged and symmetrically fixedly connected to the upper end of the second body, and a plurality of second reinforcing bolts for connecting the two second support plates; two sides of the lower end of the second body are provided with second supporting parts extending towards the outer side of the second body, and third bolts used for connecting the line tower lead end clamps are arranged on the second supporting parts; the second pulley is positioned between the two second supporting plates and is connected with the two second supporting plates through a second rotating shaft; the two second inclined struts are respectively positioned on two sides of the second body and are respectively connected with two sides of the second connecting part through second screw rods; and a fourth bolt connected with the line tower cross arm end fixture is arranged at the lower end of the first inclined strut.

2. The device for replacing the whole string of tension insulators at the cross arm end and the wire end of the direct current transmission line according to claim 1, is characterized in that: the cross arm end support further comprises a first rib plate connected with the first body and the first supporting part.

3. The device of claim 1 or 2 for replacing the whole string of tension insulators at the cross arm end and the wire end of the direct current transmission line, which is characterized in that: the wire end bracket further comprises a second rib plate connected with the second body and the second supporting part.

4. The device of claim 1 or 2 for replacing the whole string of tension insulators at the cross arm end and the wire end of the direct current transmission line, which is characterized in that: the second body is provided with a lightening hole.

5. The device of claim 1 or 2 for replacing the whole string of tension insulators at the cross arm end and the wire end of the direct current transmission line, which is characterized in that: the first body, the connecting part and the first supporting plate are integrated.

6. The device of claim 1 or 2 for replacing the whole string of tension insulators at the cross arm end and the wire end of the direct current transmission line, which is characterized in that: the second body and the second support plate are integrated.

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