CN205123128U - Change instrument of extra -high voltage earthing pole circuit straight line insulator with electricity - Google Patents

Abstract

The utility model discloses a tool for replacing the linear insulator of the UHV grounding pole line with electricity, which comprises a base at the cross-arm, a lead screw, a lead screw handle, an insulating pull rod and double hooks, and the base at the cross-arm and the handle of the lead screw are both provided. On the lead screw, one end of the insulating pull rod is fixedly connected to one end of the lead screw, and the other end of the insulating pull rod is fixedly connected to the double hook. The tool includes a supporting plate device, and the supporting plate device includes a socket part, a connecting part and a V-shaped The support seat and the supporting plate device are fixedly socketed on the insulating pull rod through the socket part; both ends of the double hooks are provided with wire support grooves, and the wire support grooves are provided with anti-slip parts. The supporting plate device of the utility model adopts a V-shaped support seat, and the wire connecting plate is not easy to shake left and right, and the wire supporting groove of the utility model is provided with an anti-slip part, and the wire is in the anti-skid groove during the process of pulling the wire It is not easy to slip, which improves the stability of the device, reduces the difficulty of operation, and improves the work efficiency of operators.

Description

A tool for live replacement of straight insulators of UHV grounding pole lines

technical field

The utility model relates to the field of electric power operation tools, in particular to a tool for replacing a straight line insulator of a UHV ground electrode line with electricity.

Background technique

my country's energy has three major characteristics: a large amount of energy, a small amount per capita, and unbalanced regional distribution. The UHV DC transmission technology can meet the long-distance and large-capacity power supply needs. The DC transmission system has two operation modes: unipolar operation mode and bipolar operation mode. The unipolar operation mode is divided into metal loop mode and earth (or Seawater) as the single-pole ground loop mode of the circuit, when operating in the single-pole ground loop mode, the whole system current flows through the ground loop; under normal conditions for bipolar lines, only the unbalanced current flows through the ground loop (the value is about 1% of the rated current), but when a wire or a group of converter valves fails, the DC system can still use the earth as a loop for unipolar operation. In order to reduce the impact of the current entering the ground on the power equipment of the converter station, the grounding electrode is generally arranged at a position far away from the converter station, and the distance can reach tens to hundreds of kilometers. The grounding pole line is the line connecting the converter station and the grounding pole line (usually an overhead line), and its safe and stable operation is crucial to the entire DC system.

The overvoltage of the UHV DC grounding electrode line is relatively low, generally not exceeding 35kV. The tower head clearance is designed according to the 35kV system, and the tower body structure is designed according to the 220kV line. Considering that a large current needs to pass through the grounding electrode line wire during unipolar operation, the line generally adopts a heat-resistant wire. Therefore, the live work method of the ground electrode line can refer to the characteristics of live work on 220kV lines and distribution network lines, and at the same time consider the impact of heat-resistant wires on live work when they are running at high temperatures. If a suitable equipotential operation method and corresponding operating tools are adopted to ensure a safe distance during operation and avoid direct contact of the operator with the wires, the operator can be protected from high temperature and high voltage damage.

Application number: 201220228519.1, titled: utility model patent for live replacement of straight-line horizontal double-split insulator special hook card, disclosing a support plate device for live replacement of straight-line horizontal double-split insulator special hook card, and the bottom set of insulating rod There is a sleeve, and the sleeve is fixedly connected with the wire support hook. A support plate arranged vertically and horizontally is arranged on one side of the sleeve, and a U-linked plate support seat is installed at the end of the support plate, and the link plate support seat is horizontally arranged. The support plate of the utility model adopts a U-shaped support seat, and the bottom space of the U-shaped support seat is relatively large. When it is used to support the joint plate, the joint plate is easy to shake from side to side, and even slips when it is serious, which increases the difficulty of the operation of the operators. .

Utility model content

In view of this, the purpose of this utility model is to address the deficiencies of the prior art, and provide a tool for live replacement of the linear insulator of the UHV grounding electrode line, which solves the problem of easy left and right shaking of the wire connecting plate when the prior art is used for operations. The problem that the wire is easy to slide in the wire support groove.

In order to achieve the above object, the utility model adopts the following technical solutions:

A tool for replacing a straight line insulator of a UHV ground electrode line with electricity, comprising a base at the cross arm, a lead screw, a handle of the lead screw, an insulating rod and double hooks, the base at the cross arm and the handle of the lead screw are both arranged on the On the lead screw, one end of the insulating pull rod is fixedly connected to one end of the lead screw, and the other end of the insulating pull rod is fixedly connected to the double hook. The tool also includes a supporting plate device, and the supporting plate device It includes a socket part, a connecting part and a V-shaped support seat. The supporting plate device is fixedly socketed on the insulating pull rod through the socket part; both ends of the double hook are provided with wire support slots, and The wire support groove is provided with an anti-slip part.

Preferably, the anti-slip part is a rubber bump.

Preferably, the opening angle range of the V-shaped support seat is 30°-40°.

Preferably, the anti-slip part is patterned steel.

Preferably, the inner wall of the V-shaped support seat is provided with non-slip rubber.

Preferably, the effective insulation length of the insulating pull rod is not less than 0.6m.

The beneficial effects of the utility model are:

1. The pallet device of the present utility model has a simple structure, is easy to maintain, and is easy to improve on the basis of the original tool, saves the transformation cost, and is easy to popularize and use on a large scale;

2. The supporting plate device of the present utility model adopts a V-shaped support seat. When the V-shaped support seat is used to support the wire connecting plate, due to the narrow space at the bottom of the V-shaped supporting seat, the wire connecting plate is not easy to shake left and right, and because the V-shaped support The inner wall of the support seat is provided with anti-slip rubber, which better prevents the sliding of the wire connecting plate, improves the stability of the device, reduces the difficulty of operation, and improves the work efficiency of operators;

3. The wire support trough of the present invention is provided with an anti-slip part. After the wire is positioned in the anti-slip groove, in the process of pulling the wire, due to the anti-slip part, the wire is not easy to slip in the anti-slip groove, which improves the operation. stability.

4. The effective insulation length of the insulation pull rod of the utility model is not less than 0.6m, which ensures the personal safety of the operators.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the utility model pallet device;

Fig. 3 is the structural representation of the utility model double hook;

In the figure: 1-screw, 2-screw handle, 3-base at the cross arm, 4-insulation rod, 5-supporting plate device, 6-double hook, 51-socket part, 52-connection part, 53-V type support seat, 61-anti-slip part.

detailed description

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

Example 1

As shown in Figure 1, the utility model includes a base 3 at the cross arm, a lead screw 1, a lead screw handle 2, an insulating pull rod 4 and double hooks, the lead screw handle 2 is arranged on the lead screw, and the base 3 at the cross arm Fixedly installed on the lower end of the screw handle 2 on the lead screw 1, one end of the insulating pull rod 4 is fixedly connected with one end of the lead screw 1 through a bolt, and the other end of the insulating pull rod 4 is fixedly connected with the double hook 6 through a bolt, and the insulating pull rod 4 is fixedly connected with the double hook 6 through a bolt. The effective insulation length of the rod 4 is not less than 0.6m; the utility model also includes a pallet device 5, the pallet device 5 includes a socket part 51, a connecting part 52 and a V-shaped support seat 53, the socket part 51, the connecting part 52 Welded together with the V-shaped support seat 53, the supporting plate device 5 is fixedly sleeved on the lower end of the insulating pull rod 4 through the socket part 51, and the fixed socket part 51 is fixed on the insulating pull rod 4 by bolts, and the double hook 6 Both ends are provided with wire support slots, the wire support slots are semicircular, and anti-skid parts 61 are arranged on the wire support slots. coefficient of friction.

The opening angle range of the V-shaped supporting seat of the pallet device 5 is 30°-40°, and the opening of the supporting seat is designed as V-shaped. On the one hand, the lead connecting plate is placed in the supporting seat. On the other hand, due to the V-shaped structure Compared with the U-shaped structure, the bottom space is smaller, and the movable space of the wire connecting board is smaller, which can effectively prevent the wire connecting board from shaking left and right. The inner wall of the V-shaped support seat 53 is provided with non-slip rubber, which further prevents the wire connecting plate from shaking left and right and sliding back and forth in the V-shaped support seat 53 during the lifting process, improves the stability of the device, and reduces the difficulty of operation. , improving the working efficiency of the workers.

The working principle of the utility model is:

When the utility model is used to replace the straight line insulator of the UHV grounding pole with electricity, firstly, the base 3 at the cross arm is installed on the gap between the two angle irons at the cross arm directly above the insulator, so as to undertake the whole process of replacing the insulator. The load of the tool; then, hook the wires with double hooks 6, and the two wires fall respectively in the two wire support grooves of the double hooks 6, and let the connecting board support support the wire connecting board at the same time, and the wire connecting board is placed Into the V-shaped support seat 53. Adjust the length of the screw 1 through the screw handle 2 to lift the double hook 6 and the supporting plate device 5, the wire is lifted under the action of the double hook 6, the load borne by the insulator is transferred to the insulating pull rod 4, and the insulator string is loose at this time , remove the insulator, loosen the wire connecting plate and the insulator, because the supporting plate device 5 provides support for the wire connecting plate, the wire connecting plate will not shake; finally, replace the new insulator, that is, complete the electrification of the insulator Change jobs.

Example 2

The difference between this embodiment and Embodiment 1 is that the anti-slip portion 61 of the wire support groove is made of patterned steel, and the pattern steel is machined onto the surface of the wire support groove.

The working principle of this embodiment is the same as that of Embodiment 1.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model without limitation, other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the utility model, as long as they do not depart from the technical solution of the utility model The spirit and scope should be included in the scope of the claims of the present utility model.

Claims (6)

1. the instrument of a charged for replacement ultra high voltage ground electrode circuit linear insulator, comprise cross-arm place base, leading screw, leading screw handle, insulation pull-rod and double-hung, described cross-arm place base and leading screw handle are all arranged on described leading screw, described one end of insulation pull-rod is fixedly connected with one end of leading screw, the other end of described insulation pull-rod is fixedly connected with described double-hung, it is characterized in that: described instrument also comprises pallet arrangement, described pallet arrangement comprises socket part, connecting portion and V-type supporting seat, described pallet arrangement is fixedly sleeved on described insulation pull-rod by socket part, the two ends of described double-hung are equipped with thread slot, and described thread slot is provided with anti-slip part.

2. the instrument of a kind of charged for replacement ultra high voltage ground electrode circuit linear insulator according to claim 1, is characterized in that: described anti-slip part is rubber projection.

3. the instrument of a kind of charged for replacement ultra high voltage ground electrode circuit linear insulator according to claim 1, is characterized in that: the opening angle scope of described V-type supporting seat is 30 °-40 °.

4. the instrument of a kind of charged for replacement ultra high voltage ground electrode circuit linear insulator according to claim 1, is characterized in that: described anti-slip part is riffled iron.

5. the instrument of a kind of charged for replacement ultra high voltage ground electrode circuit linear insulator according to claim 3, is characterized in that: the inwall of described V-type supporting seat is provided with anti-slip rubber.

6. the instrument of a kind of charged for replacement ultra high voltage ground electrode circuit linear insulator according to claim 1, is characterized in that: effective insulated lengths of described insulation pull-rod is no less than 0.6m.