CN201315354Y - Grounding wire clamp at gap bridge bus conducting wire end - Google Patents

Abstract

The utility model discloses a grounding wire clamp at the wire end of a bridge busbar, which is mainly composed of a mechanical screw-on screw chuck, an L-shaped wire clamp base, a hook head and upper tool teeth, and the mechanical screw-on screw clamp is screwed through by a metal rod. Connected to the bottom of the L-shaped wire clamp base, the top of the metal rod is provided with an upper tool tooth, and the upper end of the L-shaped wire clamp base is connected with a hook head, and the upper top tool tooth moves up and down in the space formed by the L-shaped wire clamp base and the hook head , tighten or loosen. The utility model can be conveniently connected to the insulating rod, the fastening force is uploaded vertically through the rotating handle, and the required force is small, and the upper and lower tool teeth can be adjusted up and down, so that the application range is wide; the combined structure is convenient for disassembly and assembly. Portable; without using any climbing tools, the installation of the bridge bus ground wire is quickly completed, which shortens the time, reduces personal casualties, and improves the reliability of power supply.

Description

Grounding clamp for bridge busbar conductor end

Technical field:

The utility model relates to a safety production device for an electric power system, in particular to a safety connection device for a bridge bus on the low-voltage side (6kV-35kV) of a main transformer with a capacity of 40MVA and above.

Background technique:

With the rapid development of the domestic economy, the load of power end users has increased sharply, and the installed capacity of a single transformer in transmission and distribution substations has increased significantly. Taking 110kV substation as an example, the capacity of a single main transformer in my country has been increased from 31.5MVA in the past to 50MVA or 60MVA. Due to the increase in the capacity of a single main transformer, the bridge busbars (6kV, 10kV, 35kV) on the low-voltage side are all connected with double copper bars, and the thickness of the upper and lower copper bars on the busbars has reached 35mm. At the same time, the height of the reference plane of the main transformer low pressure distance has reached 3500mm. When the main transformer is overhauled, it is often necessary to use stools, ladders and other climbing tools when installing the ground wire at the low-voltage bridge bus. According to Article 13.6 of the Electric Power Safety Work Regulations of Power Grid Corporation. Among the types of grounding clamps at the existing wire ends: 1. Since the upper and lower openings of the clamps are mostly between 35Vmm-40mm, it cannot meet the requirements for the installation thickness of the bus bar; Potential safety hazard; 3. The wire clip cannot be adjusted arbitrarily according to the size of the bus bar, which limits the scope of use.

Utility model content:

The technical problem to be solved by the utility model is to provide a grounding wire clip for the wire end of the bridge busbar in view of the above deficiencies. It reduces casualties and improves the power supply reliability of power companies.

The technical scheme that the utility model takes is:

A grounding clamp at the conductor end of a bridge busbar, mainly composed of a mechanical threaded screw clamp, an L-shaped clamp base, a hook head and an upper tool tooth, and the mechanical threaded screw clamp is connected to the L-shaped wire by a metal rod Below the clamp base, the top of the metal rod is provided with upper tool teeth, and the upper end of the L-shaped wire clamp base is connected with a hook head, and the upper top tool teeth move up and down, tighten or loosen in the space formed by the L-shaped wire clamp base and the hook head. open.

The metal rod is threaded through the base of the L-shaped clamp to facilitate the upper and lower tool teeth to move up and down to tighten or loosen the busbar clamp.

The upper end of the L-shaped wire clamp base has a threaded column, which passes through the hook head and the clamping block in turn, and the top of the threaded column is screwed with the fastening nut of the clamping block, so as to facilitate disassembly and carrying.

There is an adjustment hole on the hook head to adjust the telescopic length of the hook head.

The head end on the hook head has a bent part to facilitate clamping of the bus bar clamp.

The base of the L-shaped wire clamp has a fixing part, which can fix the ground wire on the base of the L-shaped wire clamp through a nut.

There are metal pins on the mechanical threaded screw chuck, which can realize the assembly and clamping with the insulating rod.

The mechanical wire threading screw chuck, L-shaped clamp base, hook head, clamp block and upper top tool tooth are all casted by aluminum alloy material, with smooth and flat surface, which is conducive to the stable combination with the busbar, creating conditions for further tightening the upper and lower parts and grounding good.

The beneficial effect that the utility model can reach is:

1. The utility model can be easily connected to the insulating rod, and the fastening force is uploaded vertically through the rotating handle, and the required force is small; the length of the hook head can be adjusted and the upper and lower tool teeth can be adjusted up and down, so that the utility model is applicable Hard metal bridge busbars in different thicknesses and widths.

2. The utility model is easy to use, and quickly completes the installation of the bridge bus ground wire without using any climbing tools, shortening the time.

3. The utility model has a combined structure, which is convenient to disassemble and carry, has low production cost, is easy to produce in batches, and has a wide range of applications.

Description of drawings:

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

Fig. 2 is a top view of the hook in Fig. 1 .

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figure 1 and Figure 2, the grounding clamp at the conductor end of the bridge busbar is mainly composed of a mechanical threaded screw chuck 1, an L-shaped clamp base 6, a hook 10, a clamping block 9 and an upper tool tooth 4 , the mechanical threading screw chuck 1 is threaded and connected under the L-shaped clamp base 6 by a metal rod 3 with external threads, the top of the metal rod 3 is provided with an upper tool tooth 4, and the upper end of the L-shaped clamp base 6 is connected with The hook head 10 and the upper tool tooth 4 move up and down, tighten or loosen in the space formed by the L-shaped wire clamp base 6 and the hook head 10; Connect the hook head 10 with the adjustment hole 11 and the clamp block 9, and the top of the threaded column 7 is screwed with the clamp block fastening nut 8 to facilitate disassembly and carrying. The base 6 has a fixing part 5, and the mechanical wire screw chuck 1 has a metal pin 2, which can realize the assembly and clamping with the insulating rod.

When in use, first fix the ground wire made of copper stranded wire (the cross section of the wire shall not be less than 25 square millimeters) on the L-shaped clamp base 6 with the fixing part 5 through the double-hole wire lug, and the screw thread on the rotating machine Chuck 1, make the jaw gradually increase to a suitable position, sleeve the holder of the insulating rod on the mechanical threading screw chuck 1, and connect the metal pin 2 on the mechanical threading screw chuck 1 with the insulating rod Align the clamping holes on the card base, and then pick it to the bus bar through the insulating rod. The clamp between the upper tool tooth 4 and the hook head 10 is aligned with the bus bar and clamped to the bus bar horizontally. Rotate the insulating rod to drive the mechanical wire Screw chuck 1, by rotating the screw chuck 1 on the machine, the clamp between the upper tool tooth 4 and the hook head 10 is gradually reduced, so that the entire clamp bites the bus bar, so as to achieve the remote installation on the bridge bus bar For the ground wire, finally rotate the insulating rod in the opposite direction, so that the clamping hole on the insulating rod is separated from the metal pin 2 of the mechanical threading screw chuck 1, and the process of installing the ground wire for the entire bridge busbar is completed.

Claims (8)

1. A grounding clamp at the conductor end of a bridge busbar, mainly composed of a mechanical threading screw chuck, an L-shaped clamp base, a hook head and an upper tool tooth, and is characterized in that: the mechanical screwing screw chuck is made of a metal rod Connected under the base of the L-shaped wire clamp, the top of the metal rod is provided with an upper tool tooth, and the upper end of the L-shaped wire clamp base is connected with a hook head, and the upper top tool tooth is up and down in the space formed by the L-shaped wire clamp base and the hook head Move, tighten or loosen. 2. The grounding clamp at the conductor end of the bridge bus bar according to claim 1, wherein the metal rod is threaded and connected to the base of the L-shaped clamp. 3. The grounding clamp of the conductor end of the bridge busbar as claimed in claim 1 or 2, characterized in that: the upper end of the base of the L-shaped clamp has a threaded post, the threaded post passes through the hook head and the clamping block in turn, and the top of the threaded post is connected to the clip The block fastening nut is screwed on. 4. The grounding clamp of the conductor end of the bridge busbar as claimed in claim 3, wherein the hook head has an adjustment hole to adjust the telescopic length of the hook head. 5. The grounding clamp for the conductor end of the bridge busbar as claimed in claim 3, wherein the head end of the hook head has a bent part to facilitate clamping of the busbar row clamp. 6. The grounding clamp at the conductor end of the bridge bus bar according to claim 3, wherein the base of the L-shaped clamp has a fixing piece. 7. The grounding clamp of the conductor end of the bridge busbar as claimed in claim 3, characterized in that: there is a metal pin on the mechanically threaded screw chuck. 8. The grounding clamp for the conductor end of the bridge busbar as claimed in claim 3, characterized in that: the mechanical threading screw chuck, the L-shaped clamp base, the hook head, the clamping block and the upper tool tooth are all made of aluminum alloy make.

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