CN105116172A - A junction pole specially used for live tests of 35kV lighting arrester leakage currents - Google Patents

Abstract

The invention relates to a connecting rod for electric equipment, specifically a special connecting rod for the live test of the leakage current of a 35kV arrester, which solves the problems of low wiring efficiency and unsafe operation during the live test of the leakage current of a 35kV arrester. The solution: consists of a clamp head and an operating rod; The pliers head includes a support fork. The upper fork of the support fork is fixed with an upper jaw. The upper jaw is composed of a horizontal tong and two vertical tongs. An L-shaped push rod is hinged between the two vertical tongs. The free end of the L-shaped push rod is connected to the The middle part of the lower jaw is hinged, and a tension spring is supported between the horizontal clamp and the L-shaped push rod; the lower part of the support fork is a cylindrical chuck, and a threaded through hole is drilled in the chuck, and a screw is screwed in the hole, and the screw and the L-shaped push rod A support bolt is supported between the rods; the operating rod includes a bushing and a rotary rod. Advantages: 1. Reasonable structure and easy operation; 2. The wiring operation can be completed without climbing, which is safe and efficient.

Description

35kV surge arrester leakage current live test special wiring rod

technical field

The invention relates to a connecting rod for electric equipment, in particular to a special connecting rod for the live test of the leakage current of a 35kV arrester.

Background technique

According to the relevant provisions of the "Q/GDW1168-2013 Regulations for Condition Maintenance of Power Transmission and Transformation Equipment", arresters of all voltage levels should be subjected to live tests of leakage current under continuous operating voltage with a period of half a year. During the operation of the zinc oxide arrester, due to the aging of the valve plate and the failure caused by heat and impact damage, it must be pre-tested in time, and the adjacent main electrical equipment often cannot be shut down in time, so the live measurement method must be used The leakage current of the zinc oxide arrester is measured. During the measurement, in order to measure the leakage current, the leakage current meter is usually short-circuited by the wiring of the instrument, and the leakage current meter of the surge arrester with a voltage level of 35kV is different from other voltage levels, and its distance from the ground is relatively high. Due to the current lack of 35kV surge arresters Leakage current live test special wiring device, so a lot of time wasted in the process of connecting the test short wiring frame to the top of the meter head. It can be seen that it is very necessary to design a special wiring device for live test of leakage current of 35kV surge arrester that can be operated on the ground, is safe and easy to operate.

Contents of the invention

The invention solves the problems of low wiring efficiency and unsafe operation when the leakage current live test of the 35kV arrester is lacking at present, and provides a special wiring rod for the live test of the leakage current of the 35kV arrester.

The present invention is achieved through the following technical solutions: the special terminal rod for the live test of the leakage current of the 35kV arrester is composed of a clamp head and an insulating operating rod; the clamp head includes a Y-shaped support fork, and the upper fork of the support fork is fixed with an upper fork The upper jaw is composed of a horizontal tong and two vertical tongs arranged side by side at intervals, a terminal is fixed on the horizontal tong, and the upper ends of the two vertical tongs are fixedly connected to one end of the horizontal tong respectively. The lower ends of the two vertical tongs are respectively fixedly connected to the two ends of the fork, an L-shaped push rod bent towards the direction of the horizontal tongs is hinged between the two vertical tongs, one end of the L-shaped push rod is hinged to the two vertical tongs, The other end is hinged with the middle part of the lower jaw, and a tension spring is supported between the horizontal tongs and the L-shaped push rod; the lower part of the support fork is a cylindrical chuck, and a threaded through hole is drilled in the chuck. A screw is screwed inside, and a support bolt is supported between the screw and the L-shaped push rod; the insulating operating rod includes a sleeve matched with the chuck and a screw threaded through the inner end of the sleeve and connected to the screw. The length of the rod is greater than the sum of the length of the sleeve pipe and the stroke of the lower jaw. The two vertical tongs are arranged side by side at intervals to form a longitudinal groove, which is convenient for hinged L-shaped push rods between the two. The L-shaped push rod is hinged between the two vertical pliers, and one end of the push rod is hinged with the lower jaw. When the rotary rod of the insulating operating rod is twisted, the rotary rod drives the screw to rotate and rise, and the support bolt rises under the push of the screw rod, and the support bolt pushes The L-shaped push rod rotates toward the jaws, thereby driving the lower jaws and the upper jaws to close. The two ends of the tension spring respectively support the upper jaw and the L-shaped push rod, driving the lower jaw to open and reset. The end of the screw rod is connected with the screw rod to drive the screw rod to rotate and rise. The length of the screw rod is greater than the sum of the length of the casing and the lower jaw, so that after the screw rod is connected with the screw rod, the lower end can pass through the casing, which is convenient for holding and rotating by hand.

A collet hoop is fixed inside the upper end of the casing, and an L-shaped opening groove communicating with the end face is opened on the side of the collet hoop, and convex posts arranged symmetrically are fixed on the side of the collet, and the protruding post The length is less than the wall thickness of the chuck hoop; the lower end of the screw rod is fixed with a hexagonal prism, and the upper end of the screw rod is provided with a groove matching the hexagonal prism. The surface opposite to the upper jaw and the lower jaw is provided with an arc-shaped wire clamping groove.

The invention has the following advantages: 1. The structure is reasonable and the operation is simple; 2. The wiring operation can be completed without climbing and climbing, which is safe and efficient.

Description of drawings

Fig. 1 is the front view of the pliers head of the present invention;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is A-A sectional view of Fig. 2;

Figure 4 is a top view of the operating rod;

Fig. 5 is a front view of the chuck hoop;

Fig. 6 is a longitudinal sectional view of the insulating operating rod;

In the figure 1-fork, 2-horizontal clamp, 3-vertical clamp, 4-L-shaped push rod, 5-lower jaw, 6-tension spring, 7-collet, 8-screw, 9-support bolt, 10 -sleeve, 11-rotating rod, 12-collet hoop, 13-boss.

Detailed ways

The 35kV surge arrester leakage current live test special terminal rod is composed of a clamp head and an insulating operating rod; the clamp head includes a Y-shaped support fork, and the fork 1 on the upper part of the support fork is fixed with an upper jaw, and the upper jaw is formed by The horizontal tongs 2 are composed of two vertical tongs 3 arranged side by side at intervals, the horizontal tongs are fixed with terminal posts, the upper ends of the two vertical tongs 3 are fixedly connected to one end of the horizontal tongs 2 respectively, and the two vertical tongs 3 The lower ends of the forks are respectively fixedly connected to the two ends of the fork 1, and an L-shaped push rod 4 bent toward the direction of the horizontal tongs 2 is hinged between the two vertical tongs 3, and one end of the L-shaped push rod 4 is connected to the two vertical tongs 3 Hinged, the other end is hinged with the middle part of the lower jaw 5, a tension spring 6 is supported between the horizontal tongs 2 and the L-shaped push rod 4; the lower part of the support fork is a cylindrical chuck 7, and the chuck 7 A threaded through hole is drilled inside, and a screw rod 8 is screwed in the hole, and a support bolt 9 is supported between the screw rod 8 and the L-shaped push rod 4; The inner end of the casing 10 is connected to the screw rod 11 , and the length of the rotating rod 11 is greater than the sum of the length of the sleeve pipe 10 and the stroke of the lower jaw 5 .

During specific implementation, a collet hoop 12 is fixed inside the upper end of the sleeve 10, and the side of the collet hoop 12 is oppositely opened with an L-shaped opening groove communicating with the end face, and the side of the collet 7 is fixed with symmetrically arranged The protruding column 13, the length of the protruding column 13 is less than the wall thickness of the chuck hoop 12; the lower end of the screw rod 8 is fixed with a hexagonal prism, and the upper end of the screw rod 11 is provided with a groove matching the hexagonal prism. There is an L-shaped opening groove on the chuck hoop, and the protruding column on the side of the chuck can be inserted into the opening groove to prevent the twisting of the clamp head when the screw rod is turned. The end of the screw rod has a groove for connecting with the screw rod. The length of the boss is smaller than the wall thickness of the clamp hoop, so as to prevent the interference between the boss and the inner wall of the casing. The surface of the upper jaw and the lower jaw 5 is provided with an arc-shaped wire clamping groove. The arc-shaped clamping groove can hold thicker cables and prevent them from slipping off or rolling out of the jaws.

When in use, first insert the hexagonal prism at the lower end of the screw rod 8 into the groove at the upper end of the screw rod 11 to fix the two, then snap the protruding column 13 on the side of the chuck 7 into the L-shaped opening groove of the chuck hoop 12, At this point, the connection between the pliers head and the insulating operating rod is completed. Connect the wiring and grounding wire of the instrument to the binding post on the horizontal clamp 2, hold the lower end of the insulating operating rod, lift the clamp head to the meter head of the leakage current meter, align the clamp head with the lead wire of the meter head, and twist the rotary rod 11 at the lower end, the screw rod 11 drives the screw rod 8 to rotate upwards, the screw rod 8 pushes the support bolt 9 to support the rotation of the L-shaped push rod 4, and drives the lower jaw 5 to engage with the horizontal clamp 2, so that the clamp head bites the lead wire of the meter head in the jaw. Realize the short-circuit work of the leakage current meter. After the test is completed, turn the lower end of the rotary rod 11, the screw rod 8 rotates downward, the support bolt 9 descends, the L-shaped push rod 4 is reset under the drive of the tension spring 6, the lower jaw 5 and the horizontal clamp 2 are opened, and the jaws are loosened. Open the pinned meter leads, remove the pliers, and complete the live test.

Claims (3)

1. a 35kV leakage current of an arrester live testing Special wiring bar, is characterized by: be made up of binding clip and insulating bar, described binding clip comprises Y-shaped stay fork, the prong (1) on described stay fork top is fixed with upper jaw, described upper jaw is made up of horizontal pincers (2) and two spaced perpendicular pincers (3) arranged side by side, described horizontal pincers are fixed with binding post, the upper end of described two perpendicular pincers (3) is fixedly connected with one end of horizontal pincers (2) respectively, the lower end of described two perpendicular pincers (3) is fixedly connected with the two ends of prong (1) respectively, be hinged with towards the L shape push rod (4) of horizontal pincers (2) direction bending between described two perpendicular pincers (3), described L shape push rod (4) one end and two perpendicular clamp (3) hinged, the other end and lower jaw (5) middle part hinged, tension spring (6) is supported with between described horizontal pincers (2) and L shape push rod (4), the bottom of described stay fork is columniform chuck (7), and described chuck is drilled with tapped through hole in (7), is screwed with screw rod (8) in hole, is supported with support pin (9) between described screw rod (8) and L shape push rod (4), described insulating bar comprises the sleeve pipe (10) that coordinates with chuck (7) and is through the swing arm (11) that sleeve pipe (10) inner termination is connected with screw rod, and the length of described swing arm (11) is greater than the length of sleeve pipe (10) and the stroke sum of lower jaw (5).

2. 35kV leakage current of an arrester live testing Special wiring bar according to claim 1, it is characterized by: described sleeve pipe (10) upper end internal fixtion has chuck hoop (12), described chuck hoop (12) side has the L shape open slot be communicated with end face relatively, the side of described chuck (7) is fixed with symmetrically arranged projection (13), and the length of described projection (13) is less than the wall thickness of chuck hoop (12); Described screw rod (8) lower end is fixed with hexagonal prismoid, and described swing arm (11) upper end has the groove coordinated with hexagonal prismoid.

3. 35kV leakage current of an arrester live testing Special wiring bar according to claim 1 and 2, is characterized by: the surface that described upper jaw is relative with lower jaw (5) has circular arc clamp groove.