CN203456796U - Broadsword fixture for replacing single insulator of duplex insulator string during power failure - Google Patents

Abstract

The utility model discloses a big knife fixture for replacing double-connected insulator string single-piece insulators in power failure, which comprises a big knife clamp, a U-shaped ring, a first connecting plate, a first lead screw, a closed fixture, and a second lead screw and the second connecting plate, which are characterized in that the above-mentioned components are connected end to end in sequence. The beneficial effect of the utility model is that the line maintenance personnel do not need to loosen the whole series of porcelain bottles when replacing any porcelain bottle, and only need to combine the big knife card with the closed clamp to complete the replacement work, which enhances the operability of the operation and greatly It shortens the time of high-altitude operation and improves the safety of operation; it makes the use of closed clamps no longer restricted. Moreover, the tool of the utility model is easy to operate, has good versatility, and is safe and reliable.

Description

Big knife jig used to replace double-connected insulator string single-piece insulator in power failure

technical field

The utility model relates to a general tool used for power outage inspection and maintenance of power transmission lines, in particular to a general-purpose large knife fixture, which can be applied to any single piece (or multiple pieces) in double insulator strings during power outage maintenance of power transmission lines replacement.

Background technique

In the transmission line insulation equipment, glass insulators are widely used in high-voltage transmission lines due to their advantages such as arc resistance, vibration resistance, high mechanical strength, small geometric size, and light weight. According to statistics, in the Hangzhou high-voltage power grid, more than 95% of the tension strings use glass insulators. And in recent years, with the increase of the power load of the Hangzhou power grid year by year, new lines have grown at a rate of hundreds of kilometers per year, and the number of iron towers has increased day by day. The complex and changeable weather (thunderstorm) and the intricate terrain (high mountains, minefields) make the probability of transmission lines being struck by lightning increasing year by year, and the number of glass insulators self-exploding also increases accordingly. Therefore, replacement of lightning strikes, damaged There are hundreds of insulators. In order not to affect the normal operation of the transmission line, it is necessary to replace the zero-value, low-value or damaged insulators in a short time. Usually, the replacement of a certain insulator of a strain-resistant double-connected glass insulator string (non-line sequence or the first one in the sequence) and a certain pollution flashover or self-explosive insulator of a straight-line double-connected glass insulator string requires the use of closed clamps, hoists and other tools. Replacement; when replacing the first strain-resistant double-connected glass insulator string sequence (carrying sequence) or the entire string of strain-resistant double-connected glass insulators, tools such as gourds and bottle holders are required to replace them; however, there are many types of glass insulators used in the current line , and the same model, the same manufacturer, and different batches of insulator steel caps have different sizes, so that the existing closed clamps may not be able to clamp the steel caps of the insulators during the process of replacing the insulators due to the jaws of the clamps being too large or too small. cap and cannot be replaced. Moreover, due to the fixed length of the closed fixture, the closed fixture can only clamp the length of four glass insulators at most, resulting in two spaced insulators needing to be replaced twice to complete, resulting in high-altitude labor intensity and danger for operators. high. At the same time, since the closed clamp is supported by the steel cap of the glass insulator, the first insulator of the line sequence (carrying sequence) of the insulator string cannot be replaced, resulting in the use of the closed clamp being greatly restricted. Practicality is greatly reduced. Most of the replacement of synthetic insulators requires the use of bulky and bulky tools such as gourds and bottle racks, which are inconvenient for maintenance personnel to carry and increase the complexity of the replacement work.

Contents of the invention

The utility model aims to solve the above-mentioned problems existing in the prior art, and aims to provide a simple structure, practical and efficient, convenient operation, safe use, suitable for one-time replacement of any single or multiple pieces of double-connected insulator strings when the line is powered off for maintenance. Tool of.

In order to solve the above-mentioned problems, the utility model adopts the following technical scheme: the big knife clamp used for replacing the double-connected insulator string single-chip insulator in a power failure, including the big knife clamp, U-shaped ring, the first connecting plate, the first lead screw, and the closed clamp tool, the second lead screw and the second connecting plate, which are characterized in that the above-mentioned components are connected end to end in turn; the said large knife card 1 is provided with a force-bearing hole 101 for connecting the U-shaped ring 2, for connecting the The inspection hole 105 of the two connecting plates 8 on the side of the cross arm, and the main positioning hole 103 and/or the auxiliary positioning hole 104; a positioning bolt 10 chooses to penetrate into the main positioning hole 103 or the auxiliary positioning hole 104, and is connected with the The side of the cross-arm side two connecting plate 8 cooperates.

The utility model is used to replace the double insulator series monolithic insulator in power failure. When in use, the large knife is installed on the two connecting plates on the side of the cross arm, and one end of the second connecting plate is fixed on the side of the cross arm through a joint. At the same time, place the closed clamp behind the replaced insulator. Tighten and adjust the first and second lead screws, so that the positioning bolts and the side of the second connecting plate and the connecting plate are stressed. Through the tightening of the lead screws, the distance between the big knife clamp and the closed clamp is gradually shortened, and the insulator string It can be in a relaxed state, so as to achieve the purpose of maintenance personnel to replace the insulator. After the replacement is completed, reversely adjust the lead screw, the newly installed insulator string is gradually stressed, and the load is transferred. After the force is fully applied, tools such as clamps can be removed, and the replacement work is completed.

As an improvement of the present utility model, the said large knife card is provided with a force-bearing hole for connecting the U-shaped ring, an inspection hole and a main positioning hole for connecting the two connecting plates on the side of the cross arm, and the main positioning hole is The positioning bolts are penetrated, and the positioning bolts cooperate with the sides of the two connecting plates on the cross-arm side to form a force-bearing fulcrum.

As a further improvement of the present utility model, an auxiliary positioning hole is also provided on the large knife card, and the positioning bolt is selected to penetrate into the main positioning hole or the auxiliary positioning hole and the two connecting plates on the side of the cross arm. Different positions on the side cooperate to form a force-bearing fulcrum. The above-mentioned structure is to consider the multiple styles of the two-joint board, and the size of the same joint board processed by each manufacturer is not uniform. The large knife card adopts the double-hole design of the main positioning hole and the auxiliary positioning hole. It is guaranteed that all types of connecting plates can be adjusted, positioned and installed, and there will be no collision between the clamp arm and other fittings.

As a further improvement of the utility model, the upper and lower surfaces of the knife card are provided with grooves, which can reduce the weight of the knife card itself.

As a further improvement of the utility model, the knife card adopts a split two-piece symmetrical design, so as to ensure that the knife card is closely connected with the connecting plate, does not shake after being stressed, and has stable force bearing.

As a further improvement of the utility model, the upper and lower pieces of the knife card are designed in an arc shape, so as to enhance the strength of the knife card and resist deformation caused by pulling force.

As a further improvement of the utility model, the said big knife clamp adopts integral forging of LC4 aluminum alloy material, which further improves the mechanical strength of the clamp.

The beneficial effects of the utility model are:

1. Due to the unique structural design, line maintenance personnel do not need to loosen the whole series of porcelain bottles when replacing the first porcelain bottle of the strain-resistant double-connected glass insulator string sequence (carrying sequence), and only need to combine the big knife card with the closed clamp to complete the replacement work , enhance the operability of the operation, greatly shorten the time of high-altitude operation, and improve the safety of the operation; the closed fixture is no longer restricted in use.

2. According to the operation characteristics when replacing double-connected glass insulator strings, maintenance personnel can use this tool to replace any type of double-connected insulators, including any one or more pieces of double-connected insulator strings, which expands the practical scope of the operation.

3. Because the tool of the utility model is easy to operate, has good versatility, and is safe and reliable, it reduces the working time of maintenance personnel on the pole and reduces the danger of high-altitude operations, which will lay a solid foundation for its popularization and application.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Fig. 1 is a schematic diagram of the structure of the utility model for the replacement of double-connected insulator string single-chip insulators.

Fig. 2 is a structural schematic diagram of the large knife card of the present invention.

Fig. 3 is a schematic diagram of the use state of the utility model.

Detailed ways

Referring to Fig. 1, the utility model is used for replacing double insulator string monolithic insulators in a power failure. 5. The second lead screw 6 and the second connecting plate 7, the above-mentioned components are connected end to end in sequence.

Described big knife card 1 adopts split type up and down two symmetrical designs. The big knife clamp is integrally forged with LC4 aluminum alloy material, which further improves the mechanical strength of the clamp.

Referring to Fig. 2, the large knife card 1 is provided with a force-receiving hole 101 for connecting the U-shaped ring 2, an inspection hole 105 for connecting the two connecting plates 8 on the cross-arm side, a main positioning hole 103 and an auxiliary positioning hole 104. Positioning bolt 10 selects one to penetrate into the main positioning hole 103 or auxiliary positioning hole 104 of the upper and lower two pieces of the large knife card and cooperates with the different positions of the two side plates 8 on the side of the cross arm to form a force fulcrum, which ensures All types of double plates can be installed, positioned and adjusted, and there will be no collision between the clamp arm and other hardware.

The upper and lower surfaces of the knife card 1 are provided with grooves 102 to reduce the weight of the knife card.

In conjunction with Fig. 3, the working principle of the present utility model is as follows:

1. Use bolts 11 to penetrate the inspection hole 105 of the upper knife card 1, the inspection hole 8 of the second joint plate 8 on the cross-arm side and the inspection hole 105 of the lower knife card 1 in sequence, and then tighten them with nuts; After inserting into the positioning hole 103 of the upper and lower large knife cards, tighten them with nuts, so that the positioning bolts 10 are placed on the side of the second joint plate 8 on the side of the cross arm; Tighten the ring 2 and the force-receiving hole 101 of the lower knife card 1 with nuts; adjust the length of the bolt 10, bolt 11 and bolt 12 to keep the arm of the knife card and the two-piece plate level.

2. After the U-shaped ring 2, connect the first lead screw 4, the closed clamp 5, the second lead screw 6 and the second connecting plate 7 in sequence, and connect the other end of the second connecting plate 7 to the second connecting plate through the joint 13. plate 8; at the same time place the closed clamp 5 behind the replaced insulator.

3. Connect the U-shaped ring 2 to the gourd.

4. Adjust a pair of lead screws 4 and 6, the big knife card 1 rotates around its inspection hole 105, the positioning bolt 10 and the two-link plate 8 form a force fulcrum, the force hole 101 of the big knife card 1 passes through the U-shaped ring 2 and the screw rod Connection, while tightening the screw mandrels 4 and 6 to make the 9 strings of insulators in a loose state, the maintenance personnel began to replace the insulators.

5. After the replacement is completed, reversely adjust a pair of lead screws 4 and 6, so that the newly installed insulator string is gradually stressed, and the load transfer process is completed. After the force is fully applied, tools such as clamps can be removed, and the replacement work is completed.

It should be understood that: the above-mentioned embodiment is only an illustration of the utility model, rather than a limitation of the utility model, and any utility model creation within the scope of the essential spirit of the utility model all falls within the protection scope of the utility model .

Claims (4)

1. The big knife fixture used to replace the double-connected insulator string single-piece insulator in a power failure, including the big knife clamp (1), U-shaped ring (2), the first connecting plate (3), the first lead screw (4), closed The fixture (5), the second lead screw (6) and the second connecting plate (7) are characterized in that the above-mentioned components are connected end to end in sequence; the big knife clamp (1) is provided with a U-shaped ring for connecting (2) the force-bearing hole (101), the inspection hole (105) used to connect the second joint plate (8) on the cross-arm side, and the main positioning hole (103) and/or auxiliary positioning hole (104); a The positioning bolts (10) selectively pass through the main positioning hole (103) or the auxiliary positioning hole (104), and cooperate with the side of the cross-arm side two-joint plate (8). 2. The big-knife fixture for replacing single-piece insulators in double-connected insulator strings in a power failure according to claim 1, characterized in that the surface of the big-knife clamp (1) is provided with a groove (102). 3. The big-knife clamp for replacing single-piece insulators in a double-connected insulator string according to any one of claims 1 or 2, characterized in that the big-knife clamp (1) adopts a split-type upper and lower symmetrical design. 4. The big-knife fixture for replacing single-piece insulators in double-connected insulator strings in a power failure as claimed in claim 3, characterized in that the upper and lower pieces of the big-knife clamp (1) are arc-shaped.

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