CN205666343U - Modular looped netowrk cabinet earthing device - Google Patents

Abstract

The utility model relates to a grounding device for a combined ring network cabinet, which includes a wire busbar for electrical connection with the bushing of the cable terminal head of the ring network cabinet, one end of the wire busbar is electrically connected to one end of the grounding wire, and the other end of the grounding wire is connected to the The grounding wire clamp is electrically connected, and the grounding wire clamp is electrically connected to the grounding stake set on the ground where the ring network cabinet is located or the grounding conductor inside the ring network cabinet. A through hole is provided, and the plate surface of the wire bus bar is attached to the end of the cable terminal head sleeve, and the through hole and the cable terminal head sleeve are connected by connecting bolts. The plate-shaped busbar is directly fixed on the elbow-shaped cable terminal bushing in the ring network cabinet, which facilitates the grounding operation of the ring network cabinet, and then realizes the local grounding operation of the ring network cabinet in the interval of power failure, ensuring the safety of maintenance personnel at the working interval Safety.

Description

Combined ring network cabinet grounding device

technical field

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

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 device 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 device of the combined ring network cabinet, including a wire bus bar for electrical connection with the casing of the cable terminal head 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. are connected by connecting bolts.

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, the connecting bolts include first and second threaded rod sections, the first threaded rod section rod The diameter of the second threaded rod section is larger than that 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 a first tight a solid nut, and the ground wire is electrically connected to 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 connecting bolts include 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 the lower end of the wire bus bar.

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 through the connecting bolts, the strip-shaped busbar can be directly fixed on the elbow-shaped cable terminal bushing in the ring network cabinet, so as to facilitate the grounding operation of the ring network cabinet, and then realize the power failure of the fully enclosed and fully insulated ring network cabinet Interval local grounding operation ensures the personal safety of maintenance personnel at the operating interval.

Description of drawings

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

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

Fig. 3 is a structural schematic diagram of the grounding line card of the grounding device of the combined ring network cabinet;

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

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

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

detailed description

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

The combined 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 30. 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. The wire bus bar 20 is provided with a through hole 21 connected with 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 connecting bolts 50.

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 wire clamp 40. The row 20 is directly fixed on the elbow-shaped cable terminal bushing 10 in the ring network cabinet, 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 at the power failure interval, ensuring that the operation Personal safety of maintenance personnel at intervals.

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 , the connecting bolt 50 includes first and second threaded rod sections 51, 52, the diameter of the first threaded rod section 51 is larger than the diameter of the second threaded rod section 52, and 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 bus bar 20, and the second threaded rod section 52 is provided with a first fastening nut 53, 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.

6a and 6b, as the second embodiment of the present utility model, since the positional relationship of the cable terminal head sleeves 10 of the ring network cabinet is different, the three cable terminal head sleeves 10 are vertically spaced apart, and the wire busbar 20 The length direction of the plate is vertical, the through hole 21 is a strip hole and the length direction is horizontal, the connecting bolt 50 includes first and second threaded rod sections 51, 52, 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 head sleeve 10, the second threaded rod section 52 is inserted in the through hole 21 of the wire bus bar 20, and the second threaded rod section 52 is provided with a first The nut 53 is fastened, and the ground wire 30 is electrically connected to the lower 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.

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.

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 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. combination type ring main unit grounding device, it is characterised in that: include for being electrically connected with ring main unit cable termination head casing tube (10) The wire bus-bar (20) connect, one end of wire bus-bar (20) electrically connects with one end of earth lead (30), earth lead (30) The other end electrically connects with earthing clamp (40), earthing clamp (40) and the ground stud of ground, ring main unit place setting or ring main unit Internal earth conductor electrical connection, ring main unit cable termination head casing tube (10) is arranged at intervals with three, and wire bus-bar (20) is Strip of sheet, wire bus-bar (20) is provided with the through hole (21) being connected with cable termination head casing tube (10), wire bus-bar (20) fitting with cable termination head casing tube (10) pipe end in plate face, and passes through between through hole (21) and cable termination head casing tube (10) Connecting bolt (50) connects.

Combination type ring main unit grounding device the most according to claim 1, it is characterised in that: three cable termination head casing tubes (10) being horizontally spaced about, the plate length direction level of wire bus-bar (20), described through hole (21) is bar hole and length direction Level, connecting bolt (50) includes first, second screw thread bar segment (51,52), and the first screw thread bar segment (51) bar footpath is more than the second spiral shell Rasp bar section (52) bar footpath, the first screw thread bar segment (51) threadeds with cable termination head casing tube (10), the second screw thread bar segment (52) It is set in the through hole (21) of wire bus-bar (20), the second screw thread bar segment (52) is provided with the first clamp nut (53), institute State earth lead (30) to electrically connect with one end of wire bus-bar (20).

Combination type ring main unit grounding device the most according to claim 1, it is characterised in that: three cable termination head casing tubes (10) vertical spacing is arranged, and the plate length direction of wire bus-bar (20) is vertical, and described through hole (21) is bar hole and length direction Level, connecting bolt (50) includes first, second screw thread bar segment (51,52), and the first screw thread bar segment (51) bar footpath is more than the second spiral shell Rasp bar section (52) bar footpath, the first screw thread bar segment (51) threadeds with cable termination head casing tube (10), the second screw thread bar segment (52) It is set in the through hole (21) of wire bus-bar (20), the second screw thread bar segment (52) is provided with the first clamp nut (53), institute State earth lead (30) to electrically connect with the lower end of wire bus-bar (20).

4. according to the combination type ring main unit grounding device described in claims 1 to 3 any one, it is characterised in that: described ground connection Line (30) includes wire (31), is wrapped with insulating sheath (32) outside wire (31), and the two ends of wire (31) are crimped with wiring copper nose (33), wiring copper nose (33) of wire (31) one end is bolted connection with wire bus-bar (20), wire (31) another Wiring copper nose (33) of end and earthing clamp (40) are fastenedly connected by installing bolt (34).

Combination type ring main unit grounding device the most according to claim 4, it is characterised in that: described earthing clamp (40) includes For the card adapter plate (41) with the earth conductor clamping within pile or ring main unit, described card adapter plate is provided with card on (41) Mouthful, card adapter plate (41) is provided with fastening bolt (42), fastening bolt (42) is constituted with card adapter plate (41) threadeds and rod end Stretch in bayonet socket.