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CN-224233322-U - Oil-filled cable accessory stress cone sealing structure

CN224233322UCN 224233322 UCN224233322 UCN 224233322UCN-224233322-U

Abstract

The utility model discloses an oil-filled cable accessory stress cone sealing structure which comprises an insulating sleeve, a cable, a stress cone, a positioning fitting and a fixing ring. The insulating sleeve is internally provided with an installation cavity, and the installation cavity is filled with insulating filler. The cable, the stress cone and the positioning hardware fitting are arranged in the installation cavity, the stress cone and the positioning hardware fitting are sleeved outside the cable, and the positioning hardware fitting is arranged at the lower end of the stress cone. The outer wall of the stress cone is sleeved with the fixing ring, and the fixing ring is in sealing connection with the positioning hardware fitting, so that the sealing failure problem caused by uncertainty of environment, personnel and materials can be effectively prevented.

Inventors

  • DIAO YING
  • GAO CHENGHUA
  • LI ZHEN
  • ZHOU ZEDING
  • DAI CHUANXIAN
  • JIANG SONGBO

Assignees

  • 深圳市沃尔电力技术有限公司
  • 深圳市沃尔核材股份有限公司

Dates

Publication Date
20260512
Application Date
20250307

Claims (10)

  1. 1. An oil filled cable accessory stress cone seal structure, comprising: an insulating sleeve (1) having a mounting cavity (1 a); The cable (3) is arranged in the installation cavity (1 a) in a penetrating way, and an insulating filler (2) is filled between the outer wall of the cable (3) and the inner wall of the installation cavity (1 a); the stress cone (4) is sleeved on the outer wall of the cable (3) and is positioned between the outer wall of the cable (3) and the insulating filler (2); The positioning hardware fitting (5) is sleeved on the outer wall of the cable (3) and is arranged below the stress cone (4); The fixing ring (6) is sleeved on the outer wall of the stress cone (4) close to one end of the positioning hardware fitting (5), and the fixing ring (6) is in sealing connection with the positioning hardware fitting (5).
  2. 2. The sealing structure of the stress cone of the oil-filled cable accessory according to claim 1, wherein the bottom end of the stress cone (4) extends downwards and is sleeved on the outer wall of the positioning fitting (5) close to one end of the stress cone (4).
  3. 3. The sealing structure of the oil-filled cable accessory stress cone according to claim 2, wherein the stress cone (4) comprises a semiconductive portion (41) and an insulating portion (42) which are fixedly connected, the upper end of the semiconductive portion (41) is in a horn shape with an upward opening, and the insulating portion (42) is sleeved outside the semiconductive portion (41).
  4. 4. The oil-filled cable accessory stress cone sealing structure according to claim 1, wherein the positioning fitting (5) is provided with a supporting seat (51), and the supporting seat (51) is abutted with the bottom end of the stress cone (4).
  5. 5. The sealing structure of the oil-filled cable accessory stress cone according to claim 4, wherein the lower surface of the fixed ring (6) is abutted against the upper end of the supporting seat (51), a sealing groove is formed in one side, facing the fixed ring (6), of the supporting seat (51), and a sealing ring (8) is arranged in the sealing groove.
  6. 6. The oil-filled cable accessory stress cone sealing structure according to claim 4, wherein the supporting seat (51) is provided with a fixing hole for installing a fastener (7), and the fixing ring (6) is fixedly installed with the supporting seat (51) through the fastener (7).
  7. 7. The sealing structure of the stress cone of the oil-filled cable accessory according to claim 1, wherein the stress cone (4) and the fixing ring (6) are fixedly connected by adopting an adhesive.
  8. 8. The oil-filled cable accessory stress cone sealing structure according to claim 1, wherein the fixing ring (6) is made of metal.
  9. 9. The sealing structure of the oil-filled cable accessory stress cone according to claim 1, wherein a plurality of outwardly protruding umbrella skirts are distributed on the outer wall of the insulating sleeve (1) along the axial direction.
  10. 10. The oil-filled cable accessory stress cone sealing structure according to claim 9, wherein the umbrella skirt and the insulating sleeve (1) are integrally formed, and a plurality of umbrella skirts are arranged in a staggered mode.

Description

Oil-filled cable accessory stress cone sealing structure Technical Field The utility model relates to the technical field of cable accessories, in particular to a stress cone sealing structure of an oil-filled cable accessory. Background With the continuous development of power systems, the safety and reliability of cable terminals are becoming important issues in power transmission. Among them, oil-filled cable terminals are widely used for their excellent insulation properties, but their sealing properties have been a technical problem. The external insulation of oil-filled cable terminals typically employs porcelain bushings or composite bushings, with the interior filled with liquid insulating fillers, and the stress cone and its locating hardware immersed in insulating oil. At present, the sealing treatment between the stress cone and the positioning hardware fitting mainly adopts a mode of wrapping a sealing strip, when the sealing strip is used, if the ambient temperature is lower, the stretching performance of the sealing strip is weakened, the sealing effect of the sealing strip is difficult to fully develop after the sealing strip is wrapped, meanwhile, the sealing strip is immersed in a liquid insulating filler, and the sealing strip is easy to age and chemically react with the insulating filler due to long-time high-temperature immersion, so that the sealing effect of a product is unstable. Disclosure of utility model The utility model aims to solve the defects in the prior art and provides a stress cone sealing structure of an oil-filled cable accessory with stable structure. The utility model provides an oil-filled cable accessory stress cone sealing structure, which comprises: an insulating sleeve having a mounting cavity; The cable is arranged in the mounting cavity in a penetrating way, and an insulating filler is filled between the outer wall of the cable and the inner wall of the mounting cavity; The stress cone is sleeved on the outer wall of the cable and is positioned between the outer wall of the cable and the insulating filler; the positioning hardware fitting is sleeved on the outer wall of the cable and is arranged below the stress cone; the fixing ring is sleeved on the outer wall of the stress cone, which is close to one end of the positioning hardware fitting, and is in sealing connection with the positioning hardware fitting. In an embodiment, the bottom end of the stress cone extends downwards, and is sleeved on the outer wall of the positioning fitting, which is close to one end of the stress cone. In one embodiment, the stress cone comprises a semiconductive portion and an insulating portion which are fixedly connected, wherein the upper end of the semiconductive portion is in a horn shape with an upward opening, and the insulating portion is sleeved outside the semiconductive portion. In an embodiment, the positioning hardware has a supporting seat, and the supporting seat is abutted with the bottom end of the stress cone. In one embodiment, the lower surface of the fixing ring is abutted against the upper end of the supporting seat, a sealing groove is formed in one side, facing the fixing ring, of the supporting seat, and a sealing ring is arranged in the sealing groove. In an embodiment, the support base is provided with a fixing hole for installing a fastener, and the fixing ring is fixedly installed with the support base through the fastener. In one embodiment, the stress cone is fixedly connected with the fixing ring by adopting an adhesive. In an embodiment, the fixing ring is made of metal. In an embodiment, a plurality of umbrella skirts protruding outwards are distributed on the outer wall of the insulating sleeve in the axial direction. In an embodiment, the umbrella skirt and the insulating sleeve are integrally formed, and the umbrella skirts are arranged in a staggered mode. The utility model relates to an oil-filled cable accessory stress cone sealing structure, which comprises an insulating sleeve, a cable, a stress cone, a positioning fitting and a fixing ring. The insulating sleeve is internally provided with an installation cavity, and the installation cavity is filled with insulating filler. The cable, the stress cone and the positioning hardware fitting are arranged in the installation cavity, the stress cone and the positioning hardware fitting are sleeved outside the cable, and the positioning hardware fitting is arranged at the lower end of the stress cone. The outer wall of the stress cone is sleeved with the fixing ring, and the fixing ring is in sealing connection with the positioning hardware fitting, so that the sealing failure problem caused by uncertainty of environment, personnel and materials can be effectively prevented. Drawings In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art wi