CN210779043U

CN210779043U - Grounding device for T-shaped cable head

Info

Publication number: CN210779043U
Application number: CN201922242110.XU
Authority: CN
Inventors: 邱永涛; 邱宗填; 林虹珺; 梁扬滨; 庄学成; 洪冰心
Original assignee: Shishi Branch Of Quanzhou Yixing Power Engineering Construction Co ltd; Shishi Power Supply Co of State Grid Fujian Electric Power Co Ltd
Current assignee: Shishi Branch Of Quanzhou Yixing Power Engineering Construction Co ltd; Shishi Power Supply Co of State Grid Fujian Electric Power Co Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-06-16
Anticipated expiration: 2029-12-13

Abstract

The utility model relates to an earthing device technical field, especially a earthing device for T type cable head. This a earthing device for T type cable head includes the insulating rod, first conducting rod, the second conducting rod, the earth connection, first conducting rod one end is connected with the insulating rod, the other end is equipped with the spliced pole, the second conducting rod is equipped with and is connected the chamber with spliced pole matched with, the spliced pole passes the through hole of copper nose and inserts the connection chamber to make the copper nose centre gripping between first conducting rod and second conducting rod, the second conducting rod cover is equipped with the ground ring, the ground ring is connected to the earth connection, first conducting rod, and the earth connection end is provided with the earthing terminal. The utility model discloses simple structure, convenient operation, safe and reliable can prevent that the dust from getting into T type cable head, and effectively blocks electric arc, prevents that electric arc from hurting staff's hand.

Description

Grounding device for T-shaped cable head

Technical Field

The utility model relates to an earthing device technical field, especially a earthing device for T type cable head.

Background

The 10KV ring main unit has excellent electrical performance and attractive appearance and is widely applied to a power distribution network. However, in daily operation and maintenance, problems may exist, such as explosion of the voltage transformer of the ring main unit caused by system overvoltage, humid operating environment in coastal areas, inter-phase short circuit of incoming and outgoing cables or relative earth discharge, and the like, which causes the ring main unit to be forced to fail and stop operating. When the ring main unit stops operating due to the faults, the testing personnel need to perform power failure maintenance and electrical performance testing on the ring main unit.

Before the electrical performance test of the ring main unit is carried out, all cable heads of the ring main unit at intervals of incoming and outgoing lines are completely detached, and a grounding wire is hung to prevent the other end of the cable from being powered by mistake and threaten the personal safety of testers at the end of the cable. At present, cable heads of ring main units are T-shaped cable heads, and when the cable heads are used for hanging grounding wires, T-shaped sheaths are firstly detached, and then the existing grounding wires are used for hanging firmly. This way is more troublesome, simultaneously, pull down T type cable sheath and need seal with dustless bag, prevent dust pollution, pull down the cable core of sheath and also need take dustproof measure, protect the cable core, must not have the dust adhesion, otherwise, the cable head power transmission operation back that will be stained with the dust can make cable head electric field uneven distribution, finally leads to cable head insulation breakdown. This increases the workload of the worker.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main objective is to overcome prior art's shortcoming, provides a simple structure, and convenient operation can prevent that the dust from getting into T type cable head, improves work efficiency's a earthing device for T type cable head.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a earthing device for T type cable head for carry out the ground connection to T type cable head, the inside copper nose that is equipped with of T type cable head, a through hole has in the copper nose, including insulating rod, first conducting rod, second conducting rod, earth connection, first conducting rod one end is connected with the insulating rod, and the other end is equipped with the spliced pole, the second conducting rod is equipped with and is connected the chamber with spliced pole matched with, the spliced pole passes the through hole of copper nose and inserts the connection chamber to make the copper nose centre gripping between first conducting rod and second conducting rod, second conducting rod cover is equipped with the ground ring, first conducting rod are connected to the earth connection, and the earth connection end is provided with the earthing terminal.

Furthermore, an annular groove is formed in the outer surface of the second conducting rod, the annular groove is matched with the grounding ring, and the grounding ring is rotatably sleeved in the annular groove.

Furthermore, the grounding ring is of a circular ring structure, a wiring end is arranged on the grounding ring, and the grounding wire is connected with the grounding ring through the wiring end.

Furthermore, the outer surface of the connecting column is provided with outer screw threads, inner screw threads in threaded connection with the outer screw threads are processed in the connecting cavity, and the first conductive rod is in threaded connection with the second conductive rod by rotating the first conductive rod to drive the outer screw threads of the connecting column to be screwed into the inner screw threads of the second conductive rod.

Furthermore, still include the protection casing, the protection casing has umbrella-shaped structure, and the protection casing is equipped with two, on first conducting rod, the second conducting rod are located to the cover that respectively can slide.

Further, the protective cover is made of rubber materials.

Furthermore, a rubber handle sleeve is sleeved on the insulating rod.

Furthermore, a rotating handle is arranged on the second conductive rod and fixedly connected with the second conductive rod, and the rotating handle is rotated to drive the second conductive rod to rotate.

It can be known from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are:

the utility model adopts two current-conducting rods to clamp the copper nose between the current-conducting rods, so that the T-shaped cable head is well grounded; the grounding ring is rotatably sleeved on the second conductive rod, so that the grounding wire is prevented from winding when the first conductive rod is in threaded connection with the second conductive rod; the rotating handle is arranged and used for rotating the second conductive rod, so that the first conductive rod and the second conductive rod can be conveniently connected or separated, and the protective cover can be prevented from being separated from the second conductive rod in a sliding manner; by additionally arranging the protective cover, dust can be prevented from entering the T-shaped cable head when the T-shaped cable head is grounded, and the phenomenon that the electric field distribution is uneven due to dust sticking of the cable head is avoided; the protective cover can effectively block electric arcs and prevent the electric arcs from hurting hands of workers; the utility model discloses enable the cable head ground connection, need not demolish T type cable head terminal sleeve, operating time significantly reduces, alleviates staff's working strength, and convenient to carry.

Drawings

Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the grounding device and the T-shaped cable head according to the embodiment of the present invention.

Fig. 3 is a schematic view of the grounding device according to the embodiment of the present invention inserted into a T-shaped cable head.

Fig. 4 is a schematic diagram of the grounding of the three-phase cable head according to the embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a second conductive rod and a grounding ring according to an embodiment of the present invention.

In the figure: the cable comprises a T-shaped cable head, 11 copper noses, 111 through holes, 2 insulating rods, 21 rubber handle gloves, 3 first conductive rods, 31 connecting columns, 32 drilled holes, 4 second conductive rods, 41 connecting cavities, 42 annular grooves, 43 rotating handles, 5 grounding rings, 51 wiring ends, 6 grounding wires, 61 wire noses, 7 grounding ends and 8 protective covers.

Detailed Description

The present invention will be further described with reference to the following detailed description.

Referring to fig. 1 to 5, the utility model discloses an earthing device for T type cable head for carry out ground connection to T type cable head 1, 1 inside copper noses 11 that are equipped with of T type cable head have a perforation hole 111 in the copper noses 11, a looped netowrk cabinet T type cable head earthing device includes insulator bar 2, first conducting rod 3, second conducting rod 4, ground ring 5, earth connection 6, earthing terminal 7, protection casing 8.

The rubber handle sleeve 21 is sleeved on the insulating rod 2, one end of the first conductive rod 3 is connected with the insulating rod 2, the other end of the first conductive rod is provided with the connecting column 31, outer threads are arranged on the outer surface of the connecting column 31, the second conductive rod 4 is provided with a connecting cavity 41 matched with the connecting column 31, a rotating handle 43 is arranged on the second conductive rod 4, the rotating handle 43 is fixedly connected with the second conductive rod 4, and inner threads in threaded connection with the outer threads are processed in the connecting cavity 41. The connecting post 31 of the first conductive rod 3 passes through the through hole 111 of the copper nose 11 and is inserted into the connecting cavity 41, the rotating handle 43 is rotated to drive the second conductive rod 4 to rotate, so that the first conductive rod 3 drives the outer screw threads of the connecting post 31 to screw into the inner screw threads of the second conductive rod 4, the first conductive rod 3 is in threaded connection with the second conductive rod 4, the copper nose 11 is clamped between the first conductive rod 3 and the second conductive rod 3, and the T-shaped cable head 1 is well grounded. The outer surface of the second conducting rod 4 is provided with an annular groove 42, the annular groove 42 is matched with the grounding ring 5, so that the grounding ring 5 can be rotatably sleeved in the annular groove 42, the grounding ring 5 is in a circular ring structure, the grounding ring 5 is provided with a wiring end 51, and the grounding wire 6 is connected with the grounding ring 5 through the wiring end 51; the first current-conducting rod 3 is provided with a drilling hole 32, the grounding wire 6 is pressed with a wire nose 61, the wire nose 61 corresponds to the drilling hole 32 on the first current-conducting rod 3, and the grounding wire 6 is connected with the first current-conducting rod 3 through bolt connection; the grounding end 7 is arranged at the tail end of the grounding wire 6, and the grounding wire 6 is connected with the grounding ring 5, the first conductive rod 3 and the grounding end 7 in parallel to enable the T-shaped cable head 1 to be grounded. The protection casing 8 is equipped with two, on first conducting rod 3, second conducting rod 4 are located to slidable cover respectively, and protection casing 8 is umbelliform structure, and protection casing 8 adopts rubber materials to make. Each protective cover 8 can slide on the first conductive rod 3 and the second conductive rod 4, so that the protective covers 8 can block two ends of the T-shaped cable head 1, and dust is prevented from entering the T-shaped cable head 1 to cause uneven electric field distribution of the cable head; if the cable head suddenly comes, the electrified cable head can discharge to the electric conductor to generate electric arc, the electric arc can hurt the working personnel, and the protective cover 8 can effectively block the electric arc to protect the safety of the working personnel.

The working principle of the grounding device for the T-shaped cable head is as follows:

step one, a grounding wire 6 is connected with a grounding ring 5, a first conductive rod 3 and a grounding end 7, and the grounding end 7 is arranged on a field grounding flat iron;

step two, holding the rubber handle sleeve 21 on the insulating rod 2 by one hand, and rotating the rotating handle by the other hand to drive the second conductive rod to rotate so as to enable the connecting column 31 of the first conductive rod 3 to be screwed out of the connecting cavity 41 of the second conductive rod 4;

inserting the first conductive rod 3 from one end of the T-shaped cable head 1, enabling a copper nose 11 in the T-shaped cable head 1 to be sleeved on the connecting column 31, inserting the second conductive rod 4 from the other end of the T-shaped cable head 1, rotating the second conductive rod 4, enabling the inner screw threads to be in threaded connection with the outer screw threads, and clamping the copper nose 11 between the first conductive rod 3 and the second conductive rod 4;

and step four, each protective cover 8 slides on the first conductive rod 3 and the second conductive rod 4 respectively, so that the protective covers 8 block the two ends of the T-shaped cable head 1 to prevent dust from entering and effectively block electric arcs, the cable head of one phase is grounded, and the grounding method of the other two-phase cable heads has the same steps.

The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited to this, and the present invention is to be used for insubstantial modification of the present invention, which all infringes the protection scope of the present invention.

Claims

1. The utility model provides a grounding device for T type cable head for carry out ground connection to T type cable head, the inside copper nose that is equipped with of T type cable head has a through hole in the copper nose, its characterized in that: including insulating rod, first conducting rod, second conducting rod, earth connection, first conducting rod one end is connected with the insulating rod, and the other end is equipped with the spliced pole, the second conducting rod be equipped with spliced pole matched with be connected the chamber, the spliced pole passes the through hole of copper nose and inserts the connection chamber to make the copper nose centre gripping between first conducting rod and second conducting rod, the second conducting rod cover is equipped with the ground ring, first conducting rod are connected to the earth connection, and the earth connection end is provided with the earthing terminal.

2. The grounding device for a T-cable head of claim 1, wherein: the outer surface of the second conducting rod is provided with an annular groove, the annular groove is matched with a grounding ring, and the grounding ring is rotatably sleeved in the annular groove.

3. The grounding device for a T-cable head of claim 2, wherein: the ground ring is of a circular ring structure, a wiring end is arranged on the ground ring, and the ground wire is connected with the ground ring through the wiring end.

4. The grounding device for a T-cable head of claim 1, wherein: the outer surface of the connecting column is provided with outer screw threads, inner screw threads in threaded connection with the outer screw threads are processed in the connecting cavity, and the first conductive rod is rotated to drive the outer screw threads of the connecting column to be screwed into the inner screw threads of the second conductive rod, so that the first conductive rod is in threaded connection with the second conductive rod.

5. The grounding device for a T-cable head of claim 1, wherein: still include the protection casing, the protection casing has umbrella-shaped structure, and the protection casing is equipped with two, on first conducting rod, the second conducting rod are located to slidable cover respectively.

6. The grounding device for a T-cable head of claim 5, wherein: the protective cover is made of rubber materials.

7. The grounding device for a T-cable head of claim 1, wherein: the insulating rod is sleeved with a rubber handle sleeve.

8. The grounding device for a T-cable head of claim 1, wherein: and a rotating handle is arranged on the second conductive rod and fixedly connected with the second conductive rod, and the rotating handle is rotated to drive the second conductive rod to rotate.