CN205646196U - Looped netowrk cabinet earthing device - Google Patents

Abstract

The utility model relates to a power supply technical field, concretely relates to looped netowrk cabinet earthing device, including being used for the wire busbar be connected with looped netowrk cabinet cable terminal sleeve pipe electricity, the one end of wire busbar is connected with the one end of earth connection electricity, the other end and the earth clamp electricity of earth connection are connected, the earth clamp is connected with the ground connection stake or the inside earthing conductor electricity of looped netowrk cabinet of the place ground setting of looped netowrk cabinet, through the wire busbar, elbow type cable terminal sleeve pipe and earthing conductor in the earth clamp lug connection operation post department looped netowrk cabinet, thereby conveniently realize the ground connection operation of looped netowrk cabinet, and then realized totally closedly, the ground connection operation on the spot of all insulation formula looped netowrk cabinet power failure spaced, ensure the personal safety of the maintainer at operation interval.

Description

Ring network cabinet grounding device

technical field

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

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. 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 device for fully insulated and fully enclosed ring network cabinets, so as to ensure the absolute safety of maintenance personnel at work intervals.

In order to achieve the above purpose, the technical solution adopted by the utility model is: the grounding device of the ring network cabinet, including a wire busbar for electrical connection with the casing of the cable terminal head of the ring network cabinet, and one end of the wire busbar is electrically connected to one end of the grounding wire , 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 provided on the ground where the ring network cabinet is located or the grounding conductor inside the ring network cabinet.

The utility model also has the following characteristics:

There are three intervals between the cable terminal bushings of the ring network cabinet. The wire busbar is in the shape of a strip. The wire busbar is provided with a through hole connected with the cable terminal bushing. The plate surface of the wire busbar is attached to the cable terminal bushing tube and the through hole is connected with the cable terminal sleeve through the first connecting bolt.

There are three intervals between the casing of the cable terminal head of the ring network cabinet. The wire bus bar is in the shape of a strip. The wire bus bar is provided with a through hole connected with the cable terminal head casing. The cable terminal head casing is provided with an extension screw. Horizontally, the wire busbar is connected to the extension end of the extension screw.

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, the first connecting bolt includes first and second threaded rod sections, the first threaded rod The diameter of the first threaded rod is greater than that of the second threaded rod, the first threaded rod is threadedly connected to the casing of the cable terminal head, the second threaded rod is placed in the through hole of the wire bus bar, and the second threaded rod is provided with the second threaded rod. A fastening nut, the ground wire is electrically connected with one end of the wire bus bar.

Three cable terminal bushings are arranged vertically at intervals, the length direction of the wire bus bar is vertical, the through hole is a strip hole and the length direction is horizontal, the first connecting bolt includes first and second threaded rod sections, the first The diameter of the threaded rod section is larger than the diameter of the second threaded rod section, the first threaded rod section is threadedly connected with the casing of the cable terminal head, the second threaded rod section is placed in the through hole of the wire bus bar, and the second threaded rod section is provided with There is a first fastening nut, and the ground wire is electrically connected to the lower end of the wire bus bar.

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 tube Threaded connection, the other end of the extension pipe is threaded with the rod end of the second connecting screw rod, the second connecting screw rod includes the third and fourth threaded rod sections, and a step rod is arranged between the third threaded rod section and the fourth threaded rod section , the third threaded rod section is threadedly connected to the casing of the cable terminal head, the fourth threaded rod section is inserted into the through hole of the wire bus bar, and the fourth threaded rod section is provided with a second fastening nut, and the grounding wire and the wire One end of the bus bar is electrically connected.

Three cable terminal bushings are arranged vertically at intervals, 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 threaded with the wire bus bar, and the other end of the extension screw is connected to the wire bus bar. The extension pipe is threadedly connected, the other end of the extension pipe is threadedly connected to the rod end of the second connecting screw, the second connecting screw includes third and fourth threaded rod sections, and the diameter of the third threaded rod section is larger than the diameter of the fourth threaded rod section , the third threaded rod section is threadedly connected to the casing of the cable terminal head, the fourth threaded rod section is inserted into the through hole of the wire bus bar, and the fourth threaded rod section is provided with a second fastening nut, and the grounding wire and the wire The lower end of the busbar is electrically connected.

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 ground clamp is connected tightly by 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 bus bar and the grounding wire clamp, so as to facilitate the realization of the ring network cabinet. Grounding operation, and then realize the local grounding operation of the fully enclosed and fully insulated ring main unit power failure interval, to ensure the personal safety of the maintenance personnel in the operation interval.

Description of drawings

Figure 1 is a schematic structural diagram of the wire busbar of the grounding device of the ring main unit;

Fig. 2 is a structural schematic diagram of the second connecting screw of the grounding device of the ring main unit;

Fig. 3 is a structural schematic diagram of the first connecting screw of the grounding device of the ring main unit;

Fig. 4 is a structural schematic diagram of the grounding clamp of the grounding device of the ring main unit;

Fig. 5 is a structural schematic diagram of the grounding wire of the grounding device of the ring network cabinet;

Figure 6a and Figure 6b are two structural schematic diagrams of Embodiment 1 of the grounding device of the ring main unit;

Figure 7a and Figure 7b are two structural schematic diagrams of the second embodiment of the grounding device of the ring main unit;

Figure 8a and Figure 8b are two structural schematic diagrams of the third embodiment of the grounding device of the ring main unit;

Fig. 9a and Fig. 9b are two structural schematic diagrams of Embodiment 4 of the grounding device for the ring main unit.

detailed description

In conjunction with Fig. 1 to Fig. 9b, the utility model is further described:

The ring network cabinet grounding device 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 ground wire The clip 40 is electrically connected, and the grounding wire clip 40 is electrically connected to the grounding pile provided on the ground where the ring main unit is located or the grounding conductor inside the ring main unit.

Through the wire bus bar 20 and the grounding clamp 40, the elbow-shaped cable terminal bushing 10 and the grounding conductor in the ring network cabinet at the operating point are directly connected, so as to facilitate the grounding operation of the ring network cabinet, thereby realizing a fully enclosed and fully insulated ring The local grounding operation in the power failure interval of the network cabinet ensures the personal safety of the maintenance personnel in the operation interval.

Below for four specific embodiments, the utility model is further explained:

6a and 6b, as a first embodiment of the present invention, there are three bushings 10 of cable terminals in the ring network cabinet at intervals, and the wire busbar 20 is in the form of strips. 10 through the through hole 21, the plate surface of the wire bus bar 20 is attached to the end of the cable terminal bushing 10, and the through hole 21 is connected to the cable terminal bushing 10 through the first connecting bolt 50;

Three cable terminal head bushings 10 are horizontally arranged at intervals, the length direction of the wire bus bar 20 is horizontal, the through hole 21 is a strip hole and the length direction is horizontal, and the first connecting bolt 50 includes first and second threaded rod segments 51 , 52, the diameter of the first threaded rod segment 51 is larger than the rod diameter of the second threaded rod segment 52, the first threaded rod segment 51 is threadedly connected with the cable terminal sleeve 10, and the second threaded rod segment 52 is inserted into the wire bus bar 20 In the through hole 21 , a first fastening nut 53 is disposed on the second threaded rod section 52 , 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 device, the grounding wire 30 is first connected to the grounding wire clamp 40, and then the wire busbar 20 is fixed on the cable terminal sleeve 10 of the ring network cabinet through the first connecting bolt 50, and then the grounding wire 30 is Connect with the wire bus bar 20 to realize the grounding operation of the ring network cabinet. The first connecting bolt 50 adopts a two-way threaded rod structure, and the diameter of the first threaded rod section 51 is larger than the diameter of the second threaded rod section 52, so as to facilitate the wire The bus bar 20 is fixed on the cable terminal sleeve 10, and the fixing method is simple and reliable.

Combining with Fig. 8a and Fig. 8b, as the third embodiment of the present utility model, according to the arrangement positions of the cable terminal head sleeves 10 of the ring network cabinet, three ring network cabinet cable terminal head sleeves 10 are arranged at intervals, and the wire busbar 20 is a strip shape, the wire bus bar 20 is provided with a through hole 21 connected to the cable terminal sleeve 10, the plate surface of the wire bus bar 20 is attached to the end of the cable terminal sleeve 10, and the through hole 21 is connected to the cable terminal sleeve 10. are connected by the first connecting bolt 50;

Three cable terminal head bushings 10 are vertically spaced apart, the length direction of the wire busbar 20 is vertical, the through hole 21 is a strip hole and the length direction is horizontal, and the first connecting bolt 50 includes first and second threaded rods Sections 51 and 52, the diameter of the first threaded rod section 51 is greater than the diameter of the second threaded rod section 52, the first threaded rod section 51 is threadedly connected with the cable terminal head casing 10, and the second threaded rod section 52 is placed on the conductor bus bar In the through hole 21 of 20 , a first fastening nut 53 is arranged on the second threaded rod segment 52 , and the ground wire 30 is electrically connected to the lower end of the wire bus bar 20 .

The grounding operation process of the above-mentioned grounding device is substantially the same as the process in the first embodiment, and it is only necessary to arrange the wire busbar 20 vertically during the installation process.

7a and 7b, as the second embodiment of the present invention, there are three bushings 10 of the cable terminals of the ring network cabinet at intervals, and the wire bus bar 20 is in the form of strips. 10 is connected to the through hole 21, the cable terminal sleeve 10 is provided with an extension screw 60, the length direction of the extension screw 60 is horizontal, and the wire bus bar 20 is connected to the extension end of the extension screw 60;

Three cable terminal head bushings 10 are horizontally arranged at intervals, the board length direction of the wire bus bar 20 is horizontal, the through hole 21 is a strip hole and the length direction is horizontal, one end of the extension screw 60 is threadedly connected with the wire bus bar 20, and the extension screw 60, the other end is threadedly connected with the extension pipe 61, and the other end of the extension pipe 61 is threadedly connected with the rod end of the second connecting screw 62, and the second connecting screw 62 includes the third and fourth threaded rod sections 621, 622, and the third threaded rod A stepped rod 623 is provided between the section 621 and the fourth threaded rod section 622, the third threaded rod section 621 is threadedly connected with the cable terminal sleeve 10, and the fourth threaded rod section 622 is inserted into the through hole 21 of the wire bus bar 20 , the fourth threaded rod section 622 is provided with a second fastening nut 63 , 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 device, the grounding wire 30 is first connected to the grounding wire clamp 40, and then the extension screw 60 and the ring main unit cable terminal sleeve 10 are fixed on the extension screw 60 through the extension tube 61, and the extension tube One end of 61 fixes the second connecting bolt 62, the through hole 21 of the wire bus bar 20 is inserted in the fourth threaded rod section 622 of the second connecting bolt 62, and then the fourth threaded rod section 622 of the second connecting bolt 62 is set The second fastening nut 63 fixes the wire bus bar 20 to realize the grounding operation of the ring main unit. The wire bus bar 20 and the extension tube 61 are limited, so that the wire bus bar 20 can be fixed on the pipe end of the extension tube 61 conveniently, and the fixing method is simple and reliable.

9a and 9b, as the fourth embodiment of the present utility model, the ring network cabinet cable terminal head bushing 10 is provided with three intervals, the wire bus bar 20 is strip-shaped, and the wire bus bar 20 is provided with the cable terminal head bushing 10. The connecting through hole 21, the cable terminal sleeve 10 is provided with an extension screw 60, the length direction of the extension screw 60 is horizontal, and the wire bus bar 20 is connected to the extension end of the extension screw 60;

Three cable terminal sleeves 10 are vertically spaced apart, the length direction of the wire bus bar 20 is vertical, the through hole 21 is a strip hole and the length direction is horizontal, and one end of the extension screw 60 is screwed to the wire bus bar 20, The other end of the extension screw 60 is screwed to the extension tube 61, and the other end of the extension tube 61 is screwed to the rod end of the second connection screw 62. The second connection screw 62 includes third and fourth threaded rod segments 621, 622, the third The diameter of the threaded rod section 621 is larger than the diameter of the fourth threaded rod section 622, the third threaded rod section 621 is threadedly connected with the cable terminal sleeve 10, the fourth threaded rod section 622 is inserted into the through hole 21 of the wire bus bar 20, A second fastening nut 63 is provided on the fourth threaded rod section 622, and the ground wire 30 is electrically connected to the lower end of the wire bus bar 20;

The grounding operation process of the above-mentioned grounding device is substantially the same as that in the second embodiment, and it is only necessary to arrange the wire busbar 20 vertically during the installation process.

As a further preferred solution of the present utility model, 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 a wiring copper nose 33, and the wiring copper nose 33 at one end of the wire 31 is connected to the The wire bus bar 20 is fastened and connected by bolts, and the wiring copper lug 33 at the other end of the wire 31 is connected with the ground wire clamp 40 by bolts. The high-temperature transparent insulating sheath 32, the wiring copper lug 33, the wire 31 and the insulating sheath 32 adopt a soft connection crimping process, which can effectively prevent the copper wire from being broken 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.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that 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 fall within the scope of 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 includes 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 (9)

1. The grounding device of the ring network cabinet is characterized in that: it includes a wire bus bar (20) for electrical connection with the cable terminal head bushing (10) of the ring network cabinet, and one end of the wire bus bar (20) is connected to the grounding wire (30) One 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 pile provided on the ground where the ring network cabinet is located or the grounding conductor inside the ring network cabinet. 2. The ring network cabinet grounding device according to claim 1, characterized in that: the ring network cabinet cable terminal head casing (10) is provided with three intervals, the wire bus bar (20) is strip-shaped, and the wire bus bar (20) ) is provided with a through hole (21) connected to the cable terminal bushing (10), the plate surface of the wire busbar (20) is attached to the end of the cable terminal bushing (10), and the through hole (21) is connected to the cable The terminal sleeves (10) are connected by first connecting bolts (50). 3. The ring network cabinet grounding device according to claim 1, characterized in that: the ring network cabinet cable terminal head casing (10) is provided with three intervals, the wire bus bar (20) is strip-shaped, and the wire bus bar (20 ) is provided with a through hole (21) connected with the cable terminal sleeve (10), and an extension screw (60) is arranged inside the cable terminal sleeve (10). The length direction of the extension screw (60) is horizontal. 20) be connected with the extension end of extension screw rod (60). 4. The ring network cabinet grounding device according to claim 2, 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 bar-shaped hole and the length direction is horizontal, the first connecting bolt (50) includes first and second threaded rod sections (51, 52), and the diameter of the first threaded rod section (51) is larger than that of the second threaded rod section (52 ) rod diameter, the first threaded rod section (51) is threadedly connected with the cable terminal sleeve (10), the second threaded rod section (52) is inserted into the through hole (21) of the wire busbar (20), the second A first fastening nut (53) is arranged on the threaded rod section (52), and the ground wire (30) is electrically connected to one end of the wire bus bar (20). 5. The ring main unit grounding device according to claim 2, characterized in that: three cable terminal head bushings (10) are vertically spaced apart, the board length direction of the wire busbar (20) is vertical, and the through hole (21) is a bar-shaped hole and the length direction is horizontal. The first connecting bolt (50) includes first and second threaded rod sections (51, 52), and the diameter of the first threaded rod section (51) is larger than that of the second threaded rod section. (52) rod diameter, the first threaded rod section (51) is threadedly connected with the cable terminal sleeve (10), and the second threaded rod section (52) is inserted in the through hole (21) of the wire busbar (20), A first fastening nut (53) is arranged on the second threaded rod segment (52), and the ground wire (30) is electrically connected to the lower end of the wire bus bar (20). 6. The ring network cabinet grounding device according to claim 3, 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 holes (21 ) is a strip-shaped hole and the length direction is horizontal, one end of the extension screw (60) is threadedly connected with the wire busbar (20), the other end of the extension screw (60) is threaded with the extension pipe (61), and the other end of the extension pipe (61) One end is threadedly connected with the rod end of the second connecting screw (62), the second connecting screw (62) includes the third and fourth threaded rod segments (621, 622), the third threaded rod segment (621) and the fourth threaded rod Step rods (623) are arranged between the segments (622), the third threaded rod segment (621) is threadedly connected to the cable terminal sleeve (10), and the fourth threaded rod segment (622) is placed on the wire busbar (20) In the through hole (21) of the second fastening nut (63) is arranged on the fourth threaded rod segment (622), and the ground wire (30) is electrically connected to one end of the wire bus bar (20). 7. The ring network cabinet grounding device according to claim 3, characterized in that: three cable terminal head bushings (10) are vertically spaced apart, the board length direction of the wire busbar (20) is vertical, and the through hole (21) is a strip hole and the length direction is horizontal, one end of the extension screw (60) is threaded with the wire busbar (20), the other end of the extension screw (60) is threaded with the extension tube (61), and the extension tube (61) The other end of the second connecting screw (62) is threadedly connected to the rod end, and the second connecting screw (62) includes the third and fourth threaded rod sections (621, 622), and the third threaded rod section (621) has a rod diameter greater than The diameter of the fourth threaded rod section (622), the third threaded rod section (621) is threadedly connected with the cable terminal sleeve (10), and the fourth threaded rod section (622) is inserted into the through hole of the wire busbar (20) In (21), a second fastening nut (63) is arranged on the fourth threaded rod section (622), and the ground wire (30) is electrically connected to the lower end of the wire bus bar (20). 8. The ring main unit grounding device according to any one of claims 1 to 7, 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 wiring copper lugs (33), the wiring copper lugs (33) at one end of the wire (31) are connected to the wire busbar (20) by bolts, and the wires (31) at the other end The wiring copper nose (33) is connected with the grounding clamp (40) by bolts. 9. The grounding device of the ring network cabinet according to claim 8, characterized in that: the grounding wire clamp (40) includes a clamping plate (41) for clamping with the ground pile or the grounding conductor inside the ring network cabinet , the clamping plate (41) is provided with a bayonet, the clamping plate (41) is provided with a fastening bolt (42), the fastening bolt (42) and the clamping plate (41) form a threaded connection and the rod end into the bayonet.