CN203398357U - Grounding device for 10kV cable branch box, ring main unit and ring main box - Google Patents

Abstract

The utility model discloses a grounding device for a 10kV cable branch box, a ring main unit and a ring main box. The grounding device comprises an insulating operating rod, a conductor grip, a grounding wire and a grounding clip, wherein the insulating operating rod is connected with the conductor grip in a split mode, the conductor grip comprises a conductor grip body, a threaded connecting copper bush, a grounding terminal and an insulating operating rod connecting element. The threaded connecting copper bush is arranged at a first end of the conductor grip body; the grounding terminal is arranged in the middle of the conductor grip body in a sleeved mode, and is connected with the grounding wire; nuts are arranged on the conductor grip body and two sides of the grounding terminal in a sleeved mode; and the insulating operating rod connecting element is arranged at a second end of the conductor grip body. The grounding device can be in good connection with conductive parts in power transformation cable bins of the 10kv cable branch box, the ring main unit, and the ring main box, grounding is safe and reliable, the fact that the grounding wire is hung in branch boxes is achieved, the requirements, regulated in rules, of the grounding wire and hanging connection can be met, the operation is convenient, the labor intensity of constructors are really reduced, and the construction safety is effectively guaranteed.

Description

Grounding device for 10kV cable branch box, ring network cabinet and ring network box

technical field

The utility model relates to a grounding wire, in particular, the utility model relates to a grounding wire for a 10kV cable branch box, a ring network cabinet, and a ring network box. the

Background technique

The existing grounding wires are all used for overhead lines or rows, and are mounted in the horizontal phase. They cannot be used in cable branch boxes, ring network cabinets, and ring network box transformers. They can only be grounded in overhead lines or substations far away from the workplace. The line brings inconvenience to the construction, especially brings many uncertainties in terms of safety. According to the electrical safety operation regulations, the grounding wire and connection should meet the following requirements: 

1. The grounding wire should be composed of multiple strands of annealed copper wire with a transparent sheath;

2. The cross-section shall not be less than 25MM square;

3. The grounding wire should be fixed on the conductor with a clamp, and it should be in good contact, reliable connection, and three-phase short circuit;

4. Insulating rods should be used for assembly and disassembly of grounding wires, and the length should not be less than 0.7M;

5. The cross-section of the temporary grounding body is not less than 190MM square (diameter 16MM). The depth of insertion into the ground shall not be less than 0.6M;

6. A working grounding wire must be installed on the equipment side where the adjacent grounding wire cannot be seen clearly. the

Therefore, according to the actual construction situation, the ground wire cannot be hung in the 10KV cable branch box at the work site, and the adjacent ground wire is far away from the work site or in the substation, which cannot meet the sixth item above, and there are many uncertainties in terms of safety caused by the need to climb high. factors should be given sufficient attention. The shortcomings are mainly manifested in:

1) Increased the labor intensity of working class personnel and reduced work efficiency. the

2) The working time is increased and the available electricity rate is reduced. the

3) It is necessary to climb high to work, which reduces the safety factor. the

4) The adjacent grounding wire cannot be seen clearly, which brings hidden dangers to construction safety. the

Utility model content

The purpose of this utility model is to provide a grounding device for 10kV cable branch boxes, ring network cabinets, and ring network boxes, which can be used in 10kV cable branch boxes, ring network cabinets, and ring network boxes. It forms a good connection, safe and reliable grounding, solves the problem of hanging the ground wire in the branch box, and can meet the requirements for the ground wire and the connection stipulated in the regulations. the

In order to achieve the above purpose, the utility model provides a grounding device for 10kV cable branch boxes, ring network cabinets, and ring network boxes, which includes: an insulating operating rod, a wire clip, a grounding wire and a grounding clip, wherein the insulating operation The rod and the wire clamp are connected in a split type, and the wire clamp includes:

wire clamp body,

The threaded connection copper sleeve arranged at the first end of the wire clamp body;

The grounding terminal sleeved in the middle of the conductor clamp body, the grounding terminal and the conductor clamp body are connected by a slip ring, and nuts are set on the conductor clamp body and both sides of the grounding terminal, and the grounding terminal is connected to the grounding wire; and

The insulated operating rod connecting element is arranged at the second end of the lead clamp body. the

The above-mentioned grounding device for the 10kV cable branch box, the ring network cabinet, and the ring network box, wherein a gasket is arranged between the nut and the ground terminal. the

The above-mentioned grounding device for 10kV cable branch box, ring main unit, and ring main unit, wherein, both ends of the insulating operating rod are fixed for axial screw connection when hanging wires (that is, threaded copper sleeve and Axial screw connection of the cable terminal), fastening nuts (that is, nuts on both sides of the grounding terminal to fix the grounding terminal), and a tool for removing the insulating cap of the cable terminal. the

Through the analysis of the internal structure of the 10kV cable branch box, the ring network cabinet and the ring network box, the method of connecting the ground wire must be changed, and the following regulations are required: 

1) Change from the original horizontal connection method to the axial connection method. the

2) The hanging ground wire must be connected reliably and in good contact. the

3) When hooking up, the insulating operating rod and the grounding wire are not entangled. the

4) When hooking, the human body must not touch the grounding wire. the

Therefore, the grounding problem of the 10KV cable branch box must be solved by improving the wire clamp of the original grounding wire. the

First of all, the connection between the original grounding wire and the conductor is improved from a horizontal connection to an axial spiral connection, which can go deep into the cable terminal insulation sheath, so that the threaded connection copper sleeve is connected with the cable terminal fastening bolt. The size of the copper sleeve depends on the fastening bolt. Can be made into different specifications. Fix hooking issues. In order to solve the problem of winding between the insulating operating rod and the grounding wire, the method of separating the insulating operating rod and the hanging wire clamp (ie, wire clamp) is adopted. The two ends of the operating rod are fixed with tools for hooking operation (axial screw connection) and tightening the rear end nut, and can remove the insulating cap of the cable terminal, which meets the above requirements. the

In a word, the grounding device provided by the utility model can form a good connection with the conductive part in the 10kV cable branch box, the ring network cabinet, and the ring network box variable cable warehouse, and can be safely and reliably grounded, which solves the problem of hanging the ground wire in the branch box. And it can meet the requirements for grounding wire and hooking stipulated in the regulations, and it is easy to operate, which really reduces the labor intensity of construction personnel and provides an effective guarantee for construction safety. the

Description of drawings

Fig. 1 is a structural schematic diagram of a wire clip used for a grounding device of a 10kV cable branch box, a ring network cabinet, and a ring network cabinet of the present invention. the

Figures 2a and 2b are schematic diagrams of the installation of a wire clip used for a 10kV cable branch box, a ring network cabinet, and a grounding device of a ring network box according to the present invention. the

Detailed ways

The technical scheme of the utility model will be described in detail below in conjunction with the accompanying drawings. the

The structure of the grounding device for 10kV cable branch box, ring network cabinet and ring network box includes: insulating operating rod, wire clamp, grounding wire, grounding terminal and grounding clamp. the

As shown in FIG. 1 , it is a structural schematic diagram of the wire clip used for the grounding device of the 10kV cable branch box, the ring network cabinet and the ring network box provided by the utility model. This wire clip contains:

Wire clip body 11,

The threaded connection copper sleeve 12 arranged at the first end of the wire clamp body;

The grounding terminal 13 is sleeved in the middle of the wire clamp body. The grounding terminal 13 is connected to the wire clamp body 11 in a slip ring type. Nuts 14 are set on the wire clamp body 11 and both sides of the grounding terminal 13. The grounding terminal 13 is connected to the grounding wire; more preferably, a washer 16 is arranged between the nut 14 and the grounding terminal 13; and

The insulated operating rod connection device 15 provided at the second end of the lead clamp body, the insulated operating rod and the lead clamp are connected separately to avoid the risk of entanglement between the insulated operating rod and the grounding wire. the

Preferably, both ends of the insulating operating rod are fixed for axial screw connection when hanging the wire (that is, the axial screw connection between the threaded copper sleeve and the cable terminal), fastening nuts (that is, the nuts on both sides of the grounding terminal) , to fix the ground terminal) and a tool for removing the cable terminal insulation cap (this tool is a common tool). the

As shown in Figures 2a and 2b, it is a schematic diagram of the installation of the wire clamp 10 (as shown in Figure 2a) and the cable terminal 20 (as shown in Figure 2b) of the present utility model. The threaded connection copper sleeve of the clamp is connected with the axial rotation of the cable terminal. the

To sum up, the improved grounding wire can form a good connection with the conductive part in the 10kV cable branch box, ring network cabinet, and ring network box transformer cable warehouse, so as to achieve the purpose of reliable grounding and solve the problem of hanging the grounding wire in the branch box. One problem, and can meet the requirements for grounding wire and hooking stipulated in the regulations, and the operation is convenient, which really reduces the labor intensity of construction personnel and provides an effective guarantee for construction safety. the

Although the content of the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions of the present utility model will be obvious to those skilled in the art after reading the above content. Therefore, the protection scope of the present utility model should be defined by the appended claims. the

Claims (3)

1. A grounding device for 10kV cable branch box, ring network cabinet, ring network box, it comprises: insulating operating rod, conductor clamp, grounding wire and grounding clamp, it is characterized in that, insulating operating rod and conductor clamp adopt separate One-piece connection, this wire clip contains: Wire clamp body (11), The threaded connection copper sleeve (12) arranged at the first end of the wire clamp body; The grounding terminal (13) sleeved in the middle of the wire clamp body, the grounding terminal (13) and the wire clamp body (11) are connected by slip rings, on the wire clamp body (11) and on both sides of the grounding terminal (13) A nut (14) is sleeved, and the ground terminal (13) is connected to a ground wire; and An insulated operating rod connection element (15) arranged at the second end of the wire clamp body. 2. The grounding device for 10kV cable branch boxes, ring network cabinets, and ring network boxes according to claim 1, characterized in that a gasket ( 16). 3. The grounding device for 10kV cable branch box, ring network cabinet, and ring network box as claimed in claim 1, wherein both ends of the insulating operating rod are fixedly arranged to be used for hanging wires in the axial direction. Screw connections, fastening nuts and tools for removing insulating caps from cable terminals.

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