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CN-121863278-B - Grounding box of high-voltage cable

CN121863278BCN 121863278 BCN121863278 BCN 121863278BCN-121863278-B

Abstract

The invention relates to the technical field of power equipment, in particular to a grounding box of a high-voltage cable, which comprises a box body, the box body is internally provided with a plurality of grounding copper bars, and a conductor connecting mechanism is arranged on the grounding copper bars and is connected with a cable led in from the outside of the box body. The conductor connecting mechanism consists of a fixing part, a rotating part, a plurality of spiral conductive wires and a driving mechanism, wherein the fixing part is fixed on the grounding copper bar and is provided with a cable conductor through hole, the rotating part can rotate and slide along the cable installation direction, the conductive wires are connected between the fixing part and the rotating part, and the driving mechanism drives the rotating part to rotate so as to realize the binding or loosening of the conductive wires on the cable conductor. The cable conductor is stably and electrically connected with the grounding copper bar through the dynamic constraint structure of the spiral conductive wire, and meanwhile, the cable conductor has the thermal displacement compensation capability, so that the problems of loose connection, unstable conductive performance, narrow application range and the like of a traditional grounding box are effectively solved, and the cable conductor is convenient and quick to install.

Inventors

  • CHEN GUANG
  • LIU JIANLONG
  • XU LILI

Assignees

  • 无锡德刚精工机电设备有限公司

Dates

Publication Date
20260512
Application Date
20260317

Claims (9)

  1. 1. The utility model provides a high-voltage cable's earthing box, includes box (1), be equipped with a plurality of ground connection copper bars (11) in box (1), install conductor coupling mechanism (12) on ground connection copper bar (11), conductor coupling mechanism (12) are connected with the cable of introducing from the case outside, a serial communication port, conductor coupling mechanism (12) include: a fixing part (121) fixedly mounted on the grounding copper bar (11), wherein a through hole for allowing a cable conductor to pass through is formed in the fixing part (121); The rotary part (122) rotates and can be slidably arranged on the grounding copper bar (11) of the box body (1) along the cable installation direction, the rotary part (122) comprises a rotary ring (1221), the rotary ring (1221) is formed by coaxially and rotatably connecting an inner ring (12211) and an outer ring (12212), the inner ring (12211) is connected with the conductive wire (123), and an elastic piece (12213) is arranged between the inner ring (12211) and the outer ring (12212); a plurality of conductive wires (123) which are spirally connected between the fixed part (121) and the rotating part (122); And a driving mechanism (124) installed in the case (1) for driving the rotation part (122) to rotate, thereby binding or releasing the cable conductor by the conductive wire (123).
  2. 2. The high voltage cable grounding box according to claim 1, wherein the rotating part (122) further comprises a sliding seat (1222), the rotating ring (1221) is rotatably mounted on the sliding seat (1222), and the sliding seat (1222) is slidably mounted on the grounding copper bar (11).
  3. 3. The high-voltage cable grounding box according to claim 2, wherein the driving mechanism (124) comprises a worm (1241) rotatably connected with the sliding seat (1222), the rotating ring (1221) is provided with driving teeth (1242) meshed with the worm (1241), a plurality of the worms (1241) are connected in series through driving rods (1243), and one end of each driving rod (1243) is connected with a driving source (1244).
  4. 4. A grounding box for a high voltage cable according to claim 3, characterized in that the worm (1241) is connected with the drive rod (1243) in an insulating manner.
  5. 5. The high voltage cable grounding box of claim 4, characterized in that a pre-tightening assembly (125) is mounted between the inner ring (12211) and the sliding seat (1222), and when a cable conductor enters the inner hole of the inner ring (12211), the inner ring (12211) rotates to cause the conductive wire (123) to be primarily bound on the cable conductor.
  6. 6. The high voltage cable grounding box of claim 5, wherein said pre-tightening assembly (125) comprises a latch (1252) elastically hinged to a sliding base (1222), a triangular block (1251) is mounted on one side of said inner ring (12211) close to said latch (1252), when said rotating ring (1221) rotates to fully spread said conductive wire (123), the inclined surface of said triangular block (1251) contacts said latch (1252) to toggle said latch (1252), said latch (1252) eventually passes over said triangular block (1251), said outer ring (12212) rotates in a reverse direction, said triangular block (1251) stops rotating against said latch (1252), and said elastic member (12213) is elastically deformed.
  7. 7. The high voltage cable grounding box according to any one of claims 1-6, characterized in that the conductive filaments (123) are impression wires.
  8. 8. The grounding box of a high voltage cable according to claim 7, characterized in that the middle part of the conductive wire (123) is commonly connected with an elastic ring (1231).
  9. 9. The high-voltage cable grounding box according to claim 7, characterized in that the conductive wire (123) is made of copper alloy.

Description

Grounding box of high-voltage cable Technical Field The invention relates to the technical field of power equipment, in particular to a grounding box of a high-voltage cable. Background Along with the rapid development of the power industry, the high-voltage cable is applied to a power transmission system due to the advantages of small occupied area, high operation reliability, small influence from environment and the like. In the operation process of the high-voltage cable, the metal protective layer can generate induced voltage due to electromagnetic induction, if the reasonable grounding treatment is not carried out, the induced voltage is too high, the insulating damage of the protective layer can be caused, and even personal safety accidents are caused. Therefore, the grounding box is used as key matching equipment of the high-voltage cable line, and has the main effects of safely guiding the induction current or the short-circuit fault current of the cable metal protective layer into the grounding grid so as to ensure the safe and stable operation of the cable line. The Chinese patent document with the authorized bulletin number of CN120127584B discloses a high-voltage cable grounding box, which comprises a box body and a wiring component connected with a high-voltage cable, wherein the wiring component is arranged inside the box body, the wiring component comprises a confluence seat and a plurality of cuboid-shaped wiring heads, the wiring heads are transversely arranged on the confluence seat, the high-voltage cable grounding box also comprises a heat dissipation component, the heat dissipation component comprises a heat dissipation seat, a driver and a cold row, the driver and the cold row are arranged outside the box body, the heat dissipation seat is detachably arranged on the confluence seat, a plurality of matching grooves matched with the wiring heads are formed in the heat dissipation seat, a first runner for cooling liquid to flow is arranged in the heat dissipation seat, and the heat dissipation seat, the driver and the cold row are sequentially connected in a head-tail circulating mode. According to the technical scheme, the radiating assembly comprises the radiating seat, the driver and the cold row, the driver drives cooling liquid of the radiating assembly to circulate among the cold row, the driver and the radiating seat, so that the aim of radiating heat is achieved, and the sealing structure of the box body is not damaged when the radiating effect is good. In addition, in special circumstances, such as underground cable trenches, wet areas or chemical parks, the grounding box is also exposed to the risk of attack by water vapor, dust and corrosive gases. The sealing structure of the traditional grounding box is sealed by adopting a single sealing ring, the sealing performance is limited, the sealing ring is easy to age and lose efficacy after long-term use, water vapor and dust enter the box body, rust of internal metal components is caused, and the insulating performance and the service life of the grounding box are reduced. Meanwhile, the box body of the traditional grounding box is made of common steel, and corrosion of a strong corrosive environment is still difficult to resist after corrosion prevention treatment, so that the application range of the traditional grounding box is further limited. A number of improvements have been made by those skilled in the relevant art in view of the above problems. For example, chinese patent application publication No. CN118783346a discloses a high-voltage cable grounding device with an opening-free grounding regulation mode, which comprises a box body, a box cover, bolts, an a-phase component, a B-phase component, a C-phase component, a grounding end, a supporting frame, a grounding wire connecting plate, an insulating supporting plate and protective layer protectors, wherein the insulating supporting plate is fixedly connected with the box body, each protective layer protector is respectively arranged at the upper end of the insulating supporting plate, the supporting frame is fixedly connected with the insulating supporting plate, the grounding end is fixedly connected with the box body, the a-phase component, the B-phase component and the C-phase component respectively penetrate through the box body and are respectively fixedly connected with the grounding wire connecting plate, and the box cover is fixedly connected to one side of the box body through a plurality of groups of bolts. The cable metal protection layer and the protection layer protector can be detected under the condition that the grounding box is not opened, so that the safety of operation and inspection personnel is guaranteed, the detection efficiency of the cable is improved, the time required for on-site dismounting of the grounding box is reduced, and the working efficiency is improved. Therefore, research and development of the high-voltage cable grounding box with c