CN205646449U - Modular looped netowrk cabinet ground connection mechanism - Google Patents

Abstract

The utility model relates to a grounding mechanism of a combined ring network cabinet, which comprises a wire busbar for electrical connection with a casing of a cable terminal head of the ring network cabinet, one end of the wire busbar is electrically connected to one end of a ground wire, and the other end is electrically connected to a ground wire Clamp electrical connection, the grounding wire clamp is electrically connected to the grounding conductor inside the ring network cabinet, there are three bushings at the cable terminal head of the ring network cabinet at intervals, the wire bus bar is strip-shaped, and there are through holes on the wire bus bar, and the cable terminal head cover An extension screw is arranged in the tube, and the length direction of the extension screw is horizontal. The wire bus bar is connected to the extension end of the extension screw. An extension screw is set on the cable terminal casing to realize the extension of the cable terminal casing in the horizontal direction, which is convenient for passing through the strip-shaped The busbar is directly fixed on the elbow-shaped cable terminal bushing in the ring network cabinet to avoid interference with the installation of the wire busbar by other structures in the ring network cabinet. Grounding operation ensures the personal safety of maintenance personnel at the working interval.

Description

Combined ring network cabinet grounding mechanism

technical field

The utility model relates to the technical field of power supply, in particular to a combined ring network cabinet grounding mechanism.

Background technique

With the development of distribution network technology, fully insulated and fully enclosed waterproof design is the development direction of outdoor ring network cabinets, cable branch boxes, box-type substations and other equipment. The above-mentioned fully insulated and fully enclosed greatly improves the reliability of distribution network power supply. Safety and equipment safety, stable operation performance. However, in the process of power outage maintenance for these fully enclosed and fully insulated distribution network outdoor ring network cabinets and other equipment, there are some fully insulated and fully enclosed household distribution network outdoor ring network For metal grounding points, maintenance personnel can only arrange on-site safety measures by disconnecting the switch at the upper level or in the substation and closing the grounding switch. The operating point cannot be grounded, and the on-site maintenance personnel cannot absolutely determine that the operation interval is not live, which brings certain safety risks to the on-site personnel. The reason for the above problems is that fully enclosed and fully insulated outdoor ring network cabinets and other equipment are widely used in urban distribution networks. In order to improve the reliability of power supply, most of them are designed as dual power supply ring network power supply, and the incoming cables are passed through the lower cabinet door. In order to prevent misoperation of operating personnel with electrified and grounded switches, in practical applications, the medium and high voltage incoming line cabinets and contact cabinets are not equipped with grounded switches, and the outgoing line cabinets are equipped with grounded switches; secondly, these fully enclosed and fully insulated outdoor ring network cabinets Most of the equipment adopts fully insulated and fully shielded elbow cable terminal joints. The fully insulated elbow cable terminal joints have no exposed metal conductors, and traditional grounding wires cannot be installed on the job site.

Utility model content

The purpose of this utility model is to provide a grounding mechanism for fully insulated and fully enclosed combined ring network cabinets to ensure the absolute safety of maintenance personnel at the work interval.

In order to achieve the above purpose, the technical solution adopted by the utility model is: the grounding mechanism of the combined ring network cabinet, including a wire bus bar for electrical connection with the cable terminal head bushing of the ring network cabinet, one end of the wire bus bar and one end of the grounding wire Electrical connection, the other end of the grounding wire is electrically connected to the grounding wire clamp, and the grounding wire clamp is electrically connected to the grounding pile on the ground where the ring network cabinet is located or the grounding conductor inside the ring network cabinet. , the wire bus bar is in the shape of a strip, and the wire bus bar is provided with a through hole connected with the cable terminal sleeve, and the cable terminal sleeve is provided with an extension screw, and the length direction of the extension screw rod is horizontal, and the extension end of the wire bus bar and the extension screw connect.

The utility model also has the following features:

Three cable terminal bushings are arranged horizontally at intervals, the length direction of the wire bus bar is horizontal, the through hole is a strip hole and the length direction is horizontal, one end of the extension screw is threaded with the wire bus bar, and the other end of the extension screw is connected to the extension The pipe is threadedly connected, the other end of the extension pipe is threadedly connected to the rod end of the connecting screw, the connecting screw includes first and second threaded rod sections, a step rod is arranged between the first threaded rod section and the second threaded rod section, the first The threaded rod section is threadedly connected with the casing of the cable terminal head, the second threaded rod section is inserted into the through hole of the wire busbar, and a fastening nut is arranged on the second threaded rod section, and the grounding wire is electrically connected with one end of the wire busbar .

Three cable terminal head bushings are vertically spaced apart, the length direction of the wire bus bar is vertical, the through hole is a strip hole and the length direction is horizontal, one end of the extension screw is threadedly connected with the wire bus bar, and the other end of the extension screw is It is threadedly connected with the extension pipe, and the other end of the extension pipe is threadedly connected with the rod end of the connecting screw rod. The connecting screw rod includes first and second threaded rod sections, and a step rod is arranged between the first threaded rod section and the second threaded rod section. The first threaded rod section is threadedly connected to the casing of the cable terminal head, the second threaded rod section is inserted into the through hole of the wire bus bar, and the second threaded rod section is provided with a fastening nut, and the ground wire is connected to the lower end of the wire bus bar. electrical connection.

The grounding wire includes a wire, the wire is covered with an insulating sheath, and the two ends of the wire are crimped with wiring copper lugs. The grounding clamp is firmly connected by mounting bolts.

The ground wire clamp includes a clamping plate for clamping with the ground pile or the grounding conductor inside the ring network cabinet. The clamping plate is provided with a bayonet, and the clamping plate is provided with fastening bolts. The fastening bolts It is threadedly connected with the clamping plate and the rod end extends into the bayonet socket.

Compared with the prior art, the utility model has the technical effect of directly connecting the elbow-shaped cable terminal bushing and the grounding conductor in the ring network cabinet at the operating point through the wire busbar and the grounding clamp, and the wire busbar is in the shape of a strip , and an extension screw is set on the cable terminal bushing, so as to realize the horizontal extension of the cable terminal bushing, which is convenient for directly fixing the strip-shaped busbar on the elbow-shaped cable terminal bushing in the ring network cabinet, avoiding the ring network cabinet Interference with the installation of wire busbars by other structures inside, so as to facilitate the grounding operation of the ring network cabinet, and then realize the on-site grounding operation of the fully enclosed and fully insulated ring network cabinet in the power failure interval, ensuring the personal safety of the maintenance personnel at the working interval Safety.

Description of drawings

Figure 1 is a structural schematic diagram of the wire bus bar of the grounding mechanism of the combined ring network cabinet;

Figure 2 is a structural schematic diagram of the connecting screw of the grounding mechanism of the combined ring network cabinet;

Fig. 3 is a structural schematic diagram of the grounding clamp of the grounding mechanism of the combined ring network cabinet;

Fig. 4 is a structural schematic diagram of the grounding wire of the grounding mechanism of the combined ring network cabinet;

Figure 5a and Figure 5b are two structural schematic diagrams of Embodiment 1 of the grounding mechanism of the combined ring network cabinet;

Figure 6a and Figure 6b are two structural schematic diagrams of Embodiment 2 of the grounding mechanism of the combined ring network cabinet;

detailed description

In conjunction with Fig. 1 to Fig. 6b, the utility model is further described:

The combined ring network cabinet grounding mechanism includes a wire bus bar 20 for electrical connection with the ring network cabinet cable terminal head bushing 10, one end of the wire bus bar 20 is electrically connected to one end of the ground wire 30, and the other end of the ground wire 30 is connected to the The grounding wire clamp 40 is electrically connected, and the grounding wire clamp 40 is electrically connected with the grounding pile provided on the ground where the ring network cabinet is located or the grounding conductor inside the ring network cabinet. In the shape of strips, the wire bus bar 20 is provided with a through hole 21 connected to the cable terminal sleeve 10, and the cable terminal sleeve 10 is provided with an extension screw 50, and the length direction of the extension screw 50 is horizontal. The wire bus bar 20 and the extension screw 50 extension end connection.

Directly connect the elbow-shaped cable terminal bushing 10 and the grounding conductor in the ring network cabinet at the operating point through the wire bus bar 20 and the grounding clamp 40. The wire bus bar 20 is in the shape of a strip, and an extension screw 50 is set on the cable terminal bushing 10 , so as to realize the extension of the cable terminal bushing 10 in the horizontal direction, which is convenient for directly fixing the slatted busbar 20 on the elbow-shaped cable terminal bushing 10 in the ring network cabinet, so as to avoid other structures in the ring network cabinet from interfering with the wire busbar. 20 installation interference, so as to facilitate the grounding operation of the ring network cabinet, and then realize the on-site grounding operation of the fully enclosed and fully insulated ring network cabinet in the power failure interval, ensuring the personal safety of the maintenance personnel at the operation interval.

Below in conjunction with two specific embodiments of implementation, the utility model is further explained:

5a and 5b, as Embodiment 1 of the present utility model, three cable terminal head bushings 10 are horizontally arranged at intervals, the board length direction of the wire bus bar 20 is horizontal, and the through holes 21 are strip-shaped holes and the length direction is horizontal , one end of the extension screw 50 is threadedly connected with the wire bus bar 20, the other end of the extension screw 50 is threaded with the extension pipe 60, and the other end of the extension pipe 60 is threaded with the rod end of the connection screw 70, and the connection screw 70 includes first, The second threaded rod section 71, 72, a stepped rod 73 is arranged between the first threaded rod section 71 and the second threaded rod section 72, the first threaded rod section 71 is threadedly connected with the cable terminal sleeve 10, the second threaded rod section 72 is placed in the through hole 21 of the wire bus bar 20, and the two threaded rod sections 72 are provided with fastening nuts 74, and the ground wire 30 is electrically connected to one end of the wire bus bar 20;

During the grounding operation of the above-mentioned grounding mechanism, the grounding wire 30 is first connected to the grounding wire clamp 40, and then the extension screw 50 and the ring main unit cable terminal sleeve 10 are fixed on the extension screw 50 through the extension tube 60, and the extension tube One end of 60 fixes the connecting bolt 70, the through hole 21 of the wire bus bar 20 is inserted in the first threaded rod section 71 of the connecting bolt 70, and then the second threaded rod section 72 of the connecting bolt 70 is provided with a fastening nut 74, thereby Fix the wire bus bar 20 to realize the grounding operation of the ring network cabinet. The connecting bolt 70 adopts a two-way threaded rod structure, and a step bar 73 is set in the middle of the connecting bolt 70, thereby realizing the limit of the wire bus bar 20 and the extension pipe 60, which is convenient The wire busbar 20 is fixed on the pipe end of the extension pipe 60, and the fixing method is simple and reliable.

6a and 6b, as Embodiment 1 of the present utility model, since the positional relationship of the cable terminal head sleeves 10 of the ring network cabinet is different, three or three cable terminal head sleeves 10 are arranged vertically at intervals, and the wire busbar The plate length direction of 20 is vertical, the through hole 21 is a strip hole and the length direction is horizontal, one end of the extension screw 50 is screwed to the wire bus bar 20, the other end of the extension screw 50 is screwed to the extension tube 60, and the extension tube The other end of 60 is threadedly connected to the rod end of the connecting screw 70, the connecting screw 70 includes first and second threaded rod sections 71, 72, and a stepped rod 73 is arranged between the first threaded rod section 71 and the second threaded rod section 72 , the first threaded rod section 71 is threadedly connected with the cable terminal head sleeve 10, the second threaded rod section 72 is inserted into the through hole 21 of the wire bus bar 20, and the second threaded rod section 72 is provided with a fastening nut 74, said The ground wire 30 is electrically connected to the lower end of the wire bus bar 20 .

Similarly, during the grounding operation of the above-mentioned grounding mechanism, the grounding wire 30 is first connected to the grounding wire clamp 40, and then the extension screw 50 and the cable terminal sleeve 10 of the ring network cabinet are fixed on the extension screw 50 through the extension tube 60 One end of the extension pipe 60 is fixed to the connecting bolt 70, the through hole 21 of the wire bus bar 20 is inserted in the first threaded rod section 71 of the connecting bolt 70, and then the second threaded rod section 72 of the connecting bolt 70 is provided with a fastening nut 74, thereby fixing the wire bus bar 20 to realize the grounding operation of the ring main unit position, it is convenient to fix the wire bus bar 20 on the pipe end of the extension pipe 60, and the fixing method is simple and reliable.

As shown in Fig. 4, Fig. 5a, and Fig. 6b, the grounding wire 30 includes a wire 31, the wire 31 is covered with an insulating sheath 32, the two ends of the wire 31 are crimped with wiring copper lugs 33, and the wiring copper at one end of the wire 31 The nose 33 is tightly connected to the wire bus bar 20 through bolts, and the wiring copper nose 33 at the other end of the wire 31 is tightly connected to the grounding clamp 40 through the installation bolt 34 . The wiring copper lug 33 at the other end of the wire 31 is tightly connected to the grounding wire clamp 40 through the installation bolt 34. The wire 31 is made of multiple strands of high-quality annealed copper wire and is covered with a soft, high-temperature-resistant transparent insulating sheath 32. The wiring copper lug 33 and the wire 31 and the insulating sheath 32 adopt a soft connection crimping process, which can effectively prevent the copper wire from breaking at the connection during use, and improve the reliability and service life of the grounding wire.

More specifically, the grounding clamp 40 includes a clamping plate 41 for clamping with ground piles or grounding conductors inside the ring network cabinet. The clamping plate 41 is provided with bayonet sockets, and on the clamping plate 41 A fastening bolt 42 is provided, and the fastening bolt 42 forms a threaded connection with the clamping plate 41 and the rod end extends into the bayonet. The grounding wire clip 40 is made of high-quality aluminum alloy die-casting, and the metals of the supporting fasteners are all nickel-plated. The grounding wire clip 40 is connected to the grounding conductor of the ring network cabinet by a flat-mouth screw compression process. The flat-mouth screw-type pressing method can flexibly adapt to various grounding conductor conditions on the job site, such as the ring network cabinet door, the grounding flat iron of the cable branch box, etc., and can be firmly fixed to the ground.

For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to be included in the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (5)

1. The combined ring network cabinet grounding mechanism is characterized in that: it includes a wire busbar (20) for electrical connection with the ring network cabinet cable terminal sleeve (10), and one end of the wire busbar (20) is connected to the grounding wire ( 30), the other end of the grounding wire (30) is electrically connected to the grounding wire clamp (40), and the grounding wire clamp (40) is electrically connected to the grounding stake set on the ground where the ring main unit is located or the grounding conductor inside the ring main unit. connection, the ring network cabinet cable terminal bushing (10) is provided with three intervals, the wire busbar (20) is in the shape of a strip, and the wire busbar (20) is provided with a through hole connected to the cable terminal bushing (10) ( 21), the cable terminal sleeve (10) is provided with an extension screw (50), the length direction of the extension screw (50) is horizontal, and the wire busbar (20) is connected to the extension end of the extension screw (50). 2. The grounding mechanism of the combined ring network cabinet according to claim 1, characterized in that: three cable terminal head bushings (10) are horizontally spaced apart, the board length direction of the wire busbar (20) is horizontal, and the through hole (21) is a strip hole and the length direction is horizontal, one end of the extension screw (50) is threaded with the wire busbar (20), the other end of the extension screw (50) is threaded with the extension pipe (60), and the extension pipe (60) ) is threadedly connected with the rod end of the connecting screw (70), the connecting screw (70) includes first and second threaded rod sections (71,72), the first threaded rod section (71) and the second threaded rod section (72) is provided with a step rod (73), the first threaded rod section (71) is threadedly connected with the cable terminal sleeve (10), and the second threaded rod section (72) is placed on the wire busbar (20) In the through hole (21), fastening nuts (74) are arranged on the two threaded rod sections (72), and the ground wire (30) is electrically connected to one end of the wire bus bar (20). 3. The grounding mechanism of the combined ring network cabinet according to claim 2, characterized in that: three cable terminal head bushings (10) are vertically spaced apart, and the board length direction of the wire busbar (20) is vertical, and the The through hole (21) is a bar-shaped hole and the length direction is horizontal. One end of the extension screw (50) is threadedly connected with the wire busbar (20), and the other end of the extension screw (50) is threaded with the extension pipe (60). The other end of (60) is threadedly connected with the rod end of connecting screw rod (70), and connecting screw rod (70) comprises first, second threaded rod segment (71,72), and first threaded rod segment (71) and second screw thread A stepped rod (73) is arranged between the rod sections (72), the first threaded rod section (71) is threadedly connected with the cable terminal sleeve (10), and the second threaded rod section (72) is threaded through the wire busbar (20 ) in the through hole (21), two threaded rod sections (72) are provided with fastening nuts (74), and the ground wire (30) is electrically connected to the lower end of the wire bus bar (20). 4. The combined ring network cabinet grounding mechanism according to any one of claims 1 to 3, characterized in that: the ground wire (30) includes a wire (31), and the wire (31) is covered with an insulating sheath ( 32), the two ends of the wire (31) are crimped with a wiring copper nose (33), the wiring copper nose (33) at one end of the wire (31) is connected to the wire busbar (20) by bolts, and the wire (31) is connected The wiring copper lug (33) at one end is tightly connected with the grounding wire clip (40) through the mounting bolt (34). 5. The combined ring network cabinet grounding mechanism according to claim 4, characterized in that: the ground wire clamp (40) includes a clamping plate ( 41), the clamping plate (41) is provided with a bayonet, the clamping plate (41) is provided with a fastening bolt (42), and the fastening bolt (42) and the clamping plate (41) form a threaded connection and The rod end extends into the bayonet.