CN105514877A - Cross arm clamp for insulator replacement of steel pipe pole of common-tower double-circuit lines - Google Patents

Abstract

The invention discloses a cross-arm jig for replacing insulators with double-return steel pipe rods on the same tower, which includes a jig body. Set a wire tensioner slot with the opening facing upwards. The wire tensioner is connected with the insulating pull rod and the wire hook and then hung in the wire tensioner slot at both ends of the cross-arm jig. Tighten or loosen the wire tensioner to achieve alignment. The replacement operation of the insulator string, when the present invention is used, overcomes the problem of inconvenient maintenance work caused by the circuit design, and is easy to operate, saves time and effort, and has high work efficiency; it has strong versatility, no special requirements for the staff, and fewer operators. The replacement operation process is simple and the labor intensity is low. Generally, live workers can use it to meet the maintenance process requirements. It has the advantages of high strength, light weight, high safety, and portability. Increased electricity sales and line security.

Description

Cross-arm jig for replacing insulators with double-circuit steel pipe poles on the same tower

technical field

The invention relates to a cross-arm jig for replacing hanging insulator strings with double-circuit steel pipe rods on the same tower, which is used for ground potential live work.

Background technique

With the continuous development of social economy, the public has higher and higher requirements for reliable power supply. Due to the small space occupied by the steel pipe pole, low investment, fast construction speed, beautiful and practical, it has been widely used in the construction of urban power grids in recent years. With the continuous increase of power lines and the gradual aging of some equipment, the daily maintenance and repair tasks of transmission lines are becoming more and more heavy. Due to the smooth surface of the steel pipe rod and the narrow operating space in the line design, the work task requirements of the live maintenance of the equipment are not fully considered, and limited by the design situation, the rod shape and wire arrangement of the double-circuit steel pipe rod in the same tower are compared with the single-circuit angle steel tower. The line is more compact and the distance between phases is also smaller, which makes it very difficult to carry out live work on the steel pipe pole to replace the insulator string, which seriously affects the reliability and operation index of the line.

Contents of the invention

The technical problem to be solved by the present invention is to provide an easy-to-operate cross-arm fixture for replacing insulators with double-return steel pipe rods on the same tower.

The technical solution of the present invention is: the provided cross-arm jig for replacing insulators with double-circuit steel pipe rods on the same tower includes the jig body, and its special feature is that two cross-arm clamps are set in the middle section of the jig body , A wire tensioner slot with an opening facing upward is provided at both ends of the fixture body. After the wire tensioner is connected with the insulating pull rod and the wire lifting hook, it is hung in the wire tensioner slots at both ends of the cross-arm jig, and the insulator string can be replaced by tightening or loosening the wire tensioner.

Both ends of the fixture body are also provided with tensioner support grooves with openings facing the outside, which are set as double hanging points to adapt to the single and double insulator hanging strings.

A threaded hole penetrating up and down is provided between the above-mentioned cross-arm holder and the tensioner slot, and an "L"-shaped cross-arm hook with a lead screw is installed in the threaded hole. The "L"-shaped cross-arm hook connects and fixes the entire cross-arm fixture with the steel pipe rod cross-arm.

The above-mentioned cross-arm deck is provided with a rotating telescopic slider, and the maximum telescopic amount of the rotating telescopic slider is 30cm, which ensures that it is suitable for different types of cross-arms such as 35kV, 110kV, and 220kV.

The contact surface between the above-mentioned rotary telescopic slide block and the cross arm is arc-shaped and can withstand a certain force.

The middle part of the fixture body is also provided with a bird-proof device slot, which is suitable for the cross-arm end plate with the bird-proof device installed.

An adjustment fixing bolt is arranged on the card slot of the above-mentioned bird preventer, which is used for adjusting and fixing on the bird preventer.

The fixture body is made of aluminum alloy with high strength and light weight.

Beneficial effects of the present invention:

(1) The cross-arm jig provided by the present invention has a simple structure, overcomes the problem of inconvenient maintenance work caused by the circuit design, enables flexible replacement of the hanging insulator string, is easy to operate, saves time and effort, and has high work efficiency;

(2) The cross-arm jig provided by the present invention has strong versatility, has no special requirements for workers, requires fewer workers, has a simple replacement operation process, and has low labor intensity. Generally live workers can use it to meet the maintenance process requirements, and it is suitable for 35kV-110kV double-circuit steel pipe pole ground potential live work on the same tower;

(3) The cross-arm jig provided by the present invention is made of aluminum alloy, which has the advantages of high strength, light weight, high safety and portability;

(4) The cross-arm jig provided by the present invention can be used to replace insulator strings with live operation, the operation time is short, the work efficiency is high, the power failure time of the line is reduced, and the electricity sales and line safety are improved.

Description of drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.

Fig. 2 is a schematic top view of a preferred embodiment of the present invention.

Fig. 3 is a schematic view of the use state of the preferred embodiment of the present invention.

Among them, the reference signs are: 1-fixture body; 2-wire tensioner slot; 3-wire tensioner support slot; 4-bird-proof device slot; 5-adjustment fixing bolt; 6-threaded hole; 7 -Cross-arm hook; 8-Cross-arm deck; 9-Rotary telescopic slider; 10-Tightener; 11-Insulation pull rod;

detailed description

The present invention will be further described below in conjunction with accompanying drawing:

Referring to Fig. 1 and Fig. 2, the preferred embodiment of the present invention is a cross-arm fixture suitable for the polygonal cross-arm wire ends of double-circuit steel pipe rods of 35kV-220kV on the same tower. The cross-arm fixture includes a left-right symmetrical structure Fixture body 1. The middle section of the clamp body 1 is provided with two cross-arm holders 8, and each of the two ends of the clamp body 1 is provided with a wire tensioner slot 2 with an opening facing upward and a wire tensioner support groove 3 with an opening facing the outside. It is a double hanging point, which can adapt to single and double insulator hanging strings. The cross-arm card holder 8 is provided with a rotating telescopic slider 9 (the upper part has a margin of 5mm), and the maximum telescopic amount of the rotating telescopic slider 9 is 30cm, which ensures that it is suitable for different types of cross-arms such as 35kV, 110kV, and 220kV. , the narrowest cross arm is 13cm, and the widest can reach 26cm. The contact surface of the rotary telescopic slide block 9 and the cross arm will be designed as a transition connection part with a certain radian, so that it can bear a certain force. Also be provided with " Π " shape bird-proof device draw-in slot 4 between two cross-arm decks 8, bird-proof device draw-in slot 4 both sides are provided with adjusting fixing bolt 5 to adapt to cross-arm bird preventer of different sizes. A threaded hole 6 is provided between the card slot 4 of the crossarm bird-proof device and the support groove 3 of the wire tensioner, and an "L" shaped crossarm hook 7 with a lead screw screw is installed in the threaded hole 6, and the crossarm hook 7 is set as Symmetrical double hanging points can adapt to different heights and cross-arm end plates without bird preventers installed by adjusting the length of the cross-arm hook 7 and the length of the rotating telescopic slide block 9. The cross-arm hook 7 adopts the lead screw and the screw to fix the integral molding, because the double hook will bear the main force in use. The hook plate of the hook should be designed to be relatively long and wide, and the contact surface with the cross arm should be large. The hook plate was originally a right-angle type. Since the cross arm is an arc, the hook plate should be designed with a certain oblique angle. The angle is about 5 degrees, and the hook plate should be higher on the right side and lower on the left side.

Referring to Fig. 3, the wire tensioner 10 is connected with the insulating pull rod 11 and the wire lifting hook 12 and then hung in the wire tensioner slot 2 at both ends of the cross-arm jig, tightening or loosening the wire tensioner 1 can realize the insulator string 14 replacement work.

The cross-arm jig provided by the invention has a simple structure, overcomes the problem of inconvenient maintenance work caused by the circuit design, enables the hanging insulator string to be replaced flexibly, is easy to operate, saves time and effort, and has high work efficiency; the cross-arm jig has strong versatility , no special requirements for the staff, fewer operators, simple replacement operation process, and low labor intensity. Generally live workers can use it to meet the maintenance process requirements. It is suitable for 35kV-110kV double-circuit steel pole ground potential live work on the same tower; the cross-arm fixture is made of aluminum alloy, which has high strength, light weight, high safety, and is easy to carry. Advantages; the cross-arm jig can replace the insulator string with live operation, the operation time is short, the work efficiency is high, the power failure time of the line is reduced, and the electricity sales and line safety are improved.

Claims (9)

1. common-tower double-return steel pipe pole changes an insulator operation cross-arm jig, and comprise jig body, it is characterized in that: described jig body stage casing arranges two cross-arm decks, jig body two ends respectively arrange an opening up wire grip draw-in groove.

2. common-tower double-return steel pipe pole according to claim 1 changes insulator operation cross-arm jig, it is characterized in that: described jig body two ends are also provided with opening wire grip bearing groove toward the outer side.

3. common-tower double-return steel pipe pole according to claim 2 changes insulator operation cross-arm jig, it is characterized in that: the screwed hole being provided with up/down perforation between described cross-arm deck and wire grip draw-in groove, " L " shape cross-arm hook of band leading screw screw rod is installed in screwed hole.

4. common-tower double-return steel pipe pole according to claim 3 changes insulator operation cross-arm jig, it is characterized in that: described cross-arm deck is provided with rotary extension slide block.

5. common-tower double-return steel pipe pole according to claim 4 changes insulator operation cross-arm jig, it is characterized in that: the maximal dilation amount of described rotary extension slide block is 30cm.

6. common-tower double-return steel pipe pole according to claim 5 changes insulator operation cross-arm jig, it is characterized in that: the contact-making surface of described rotary extension slide block and cross-arm is arc-shaped.

7. common-tower double-return steel pipe pole according to claim 6 changes insulator operation cross-arm jig, it is characterized in that: described jig body stage casing is also provided with bird proof device draw-in groove.

8. common-tower double-return steel pipe pole according to claim 7 changes insulator operation cross-arm jig, it is characterized in that: described bird proof device draw-in groove is provided with adjustment set bolt.

9. change insulator operation cross-arm jig according to described common-tower double-return steel pipe pole arbitrary in claim 1-8, it is characterized in that: described jig body is aluminum alloy material.