Pin remover for live replacement of 220kV suspension insulator string

Abstract

The invention belongs to the technical field of electric power, and particularly relates to a pin remover for live replacement of a 220kV suspension insulator string, which is provided with an anti-collision rod (20), a connecting bolt (21), a main rod (22), a first connecting rod (23), a third connecting rod (24), a second connecting rod (25), a collision head (26), an arc connecting rod (27), afourth connecting rod (28) and a wide plate (29). According to the invention, the problem of low efficiency of live replacement of 220kV suspension insulator strings in the prior art is mainly solved.The pin remover has the following main beneficial technical effects: the 220kV suspension insulator string is quickly replaced in an electrified manner, so that the repair time is saved, the workingtime of workers is shorter, the labor intensity is lower, and the safety is higher; therefore, the power supply is more timely, and the power supply efficiency and the repair rate are higher.

Description

technical field [0001] The invention belongs to the technical field of electric power, in particular to a pin remover for live replacement of 220kV suspension insulator strings. Background technique [0002] In the prior art, the 220kV suspension insulator string is composed of multiple insulators connected in series, and the height can reach several meters. In the harsh environment of open air, high temperature and high pressure, cracking and damage often occur. In order to ensure normal power supply, When it is abnormal, it must be repaired in time. [0003] Connecting hardware 3 and pin 4 in the prior art are as figure 1 As shown, the connecting hardware 3 is composed of a connecting bowl head 31 and a fixing block 33 which is positioned under the connecting bowl head 31 and vertically connected to the lower surface of the connecting bowl head 31. The fixing block 33 has a fixing hole 331, and the connecting bowl head 31 has an opening 32 extending downward from the upp...

AI Technical Summary

Problems solved by technology

[0006] In the actual operation of live replacement of 220kV suspension insulator strings, when the opening direction of the connecting bowl head is along the line direction, live workers usually use pin pullers to do the work, and the pin puller and the insulator string are mostly perpendicular to each other during operation. , which is at the same level as the W-shaped spring pin. Due to the influence of the blind area of ​​vision and the aging and corrosion of the W-shaped spring pin during the operation, it is necessary to perform multiple tentative alignments before successfully inserting into the bowl head hanging plate. The upper and lower displacement deviation of the W-shaped spring pin cannot be controlled during other operations after the bowl head is hung with a large mouth. The operation stability is poor and the success rate cannot be guaranteed.

At the same time, when working live on site, the operator is at a high place and must always keep a safe distance between the human body, insulating tools and the live body. Due to the small movement range of the operator and the limited space for movement, it is often difficult to remove the W-shaped spring pin smoothly and effectively. You can only use the insulating operating rod to "poke and knock" the W-shaped spring pin in the groove of the insulator steel cap, single-joint bowl head or metal end, and the W-shaped spring pin cannot be effectively fixed by the pin puller during installation. During the extension and operation of the operating lever, it is very easy to cause the W-shaped spring pin to fall off from the pin puller, and the success rate of picking and installing the W-shaped spring pin is less than 50%.

Mainly: the direction of the large mouth of the bowl head hanging plate is in the blind area of ​​human vision, so you can only rely on groping and trying; the pressure equalizing ring is just above the bowl head, which hinders the operation and affects the vision; only when the insulating operating rod is kept absolutely horizontal, can the jaws be inserted exactly big mouth

The working principle of the pin pulling pliers is that the top of the insulating operating rod is connected with an arc guide rail, and the upper and lower arms of the pin pulling pliers are respectively fixed at both ends of the guide rail. rod, the jaws will close and bite the W-shaped spring pin. After stopping the pulling, use the friction force of the arc-shaped guide rail to firmly bite the jaws. At this time, the operator can try to pull out the W-shaped pin. However, various problems will be encountered in practical application: after loosening the pulling force on the insulating operating rod, the rebound force of the W-shaped spring pin after the bite is relatively large, and the friction force of the arc-shaped guide rail alone is not enough to stabilize it. The W-shaped spring pin is released under tension, and the attempt to remove the pin fails; because the force on the arc-shaped guide rail will be applied when the pin is removed, the force balance of the arc-shaped guide rail will be broken, the jaws of the pin pulling pliers will loosen, and the W-shaped spring pin will rebound. It is locked, and the attempt to remove the pin fails; the W-shaped pin may lose its elasticity due to long-term wind and rain. After the jaws are tightened, the direction of the small opening of the bowl head hanging plate is still locked, making it difficult to pull out the W-shaped spring pin.

The deficiencies in it have: during operation, the operator needs to insert the pin puller into the tail nose of the W pin and pull it out backwards to pull out the spring pin. Because it is a high-altitude operation, the operator holds the tail end of the operating rod of more than ten kilograms to control the small The tiger's mouth bites the W-pin V-tail nose in the bowl mouth. It needs a lot of limb support to complete the action of pulling out the pin. The labor intensity is extremely high and the efficiency is very low.

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