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CN-122025317-A - High-temperature early-warning insulating sheath

CN122025317ACN 122025317 ACN122025317 ACN 122025317ACN-122025317-A

Abstract

The invention discloses a high-temperature early warning insulating sheath, which relates to the technical field of electric power and electric equipment, and comprises two groups of shells, wherein the shells are wrapped on the ends of a wire cable in a combined manner, and the two shells are hinged; the shell is provided with the thermosensitive structure, the thermosensitive structure fails when the wire and cable ends heat, the limiting structure is distributed on the shell and used for limiting, when the thermosensitive structure fails, the limiting structure is released, and the two shells are sprung by springs distributed at the closed positions of the shells. According to the invention, when the internal wires and cables heat, the outer shell directly falls off, early warning signals are accurately given, meanwhile, the inner layer can still protect the ends of the wires and cables, meanwhile, the thermosensitive structure can be independently replaced, the shell is reused, and the maintenance cost is reduced.

Inventors

  • MA HUI
  • XU JINGYANG
  • Mei shuang
  • ZHANG SEN
  • LI HENG
  • Tang runheng
  • FENG XINGYA
  • Bu Yihe
  • WANG TAN
  • WU BIYU

Assignees

  • 国网江苏省电力有限公司沛县供电分公司
  • 国网江苏省电力有限公司徐州供电分公司

Dates

Publication Date
20260512
Application Date
20260306

Claims (10)

  1. 1. The utility model provides a high temperature early warning insulating sheath which characterized in that includes: the shell (1) is wrapped on the wire cable end in two groups, and the two shells (1) are hinged; the shell (1) is provided with the thermosensitive structure, and the thermosensitive structure fails when the wire and cable ends heat; the limiting structure is distributed on the shell (1) and used for limiting, when the thermosensitive structure fails, the limiting structure is released, and the two shells (1) are sprung by springs (2) distributed at the closing positions of the shells (1).
  2. 2. The high temperature warning insulation sheath of claim 1, wherein: the limiting structure comprises two groups of I-shaped buckles (3), wherein one I-shaped buckle (3) is provided with an inserting strip (4), the other I-shaped buckle (3) faces one side of the inserting strip (4) to be provided with a slot (5), the inserting strip (4) is matched with the slot (5) to combine the two I-shaped buckles (3), and the two I-shaped buckles (3) after combination are clamped in connecting grooves (6) on the two shells (1).
  3. 3. The high temperature warning insulation sheath of claim 2, wherein: The heat-sensitive structure is a heat-sensitive composition (7) mixed by 100 parts of paraffin and 15-25 parts of polyethylene wax, the composition is arranged in the slot (5) and fixes the cutting (4) at normal temperature, and when the melting threshold of the heat-sensitive composition (7) is reached, the cutting (4) is separated from the slot (5) to release limit.
  4. 4. The high temperature warning insulation sheath of claim 3, wherein: The melting temperature of the thermosensitive composition (7) is 70-90 ℃.
  5. 5. The high temperature warning insulation jacket of any of claims 2-4, wherein: A heat conducting sheet (8) is further arranged in the shell (1), and a slot is reserved at the position of the connecting groove (6) of the shell (1) to provide heat conduction for the heat conducting sheet (8) to contact the two groups of I-shaped buckles (3).
  6. 6. The high temperature warning insulation sheath of claim 1, wherein: The limiting structure comprises fixing belts (9), and the fixing belts (9) wrap the two shells (1) to be clamped and connected to fix the two shells (1).
  7. 7. The high temperature warning insulation sheath of claim 6, wherein: One end of the fixing belt (9) is bent to form a clamping section (10), the other end of the fixing belt is provided with a clamping groove (11), and the fixing belt (9) surrounds two shells (1) for one circle and then is limited by the clamping section (10) and the clamping groove (11) in a matched mode.
  8. 8. The high temperature warning insulation sheath of claim 6 or 7, wherein: the heat-sensitive structure is a heat-sensitive expansion paste (12), the heat-sensitive expansion paste (12) is formed by arranging two groups of heat-sensitive expansion pastes on the inner wall of the shell (1), bonding layers are arranged at the edges of the two heat-sensitive expansion pastes (12), and when the electric wire and cable ends heat, the heat-sensitive expansion pastes (12) expand to deform the clamping parts of the fixing bands (9) to release limit.
  9. 9. The high temperature warning insulation jacket of claim 8, wherein: the thickness of the thermosensitive expansion paste (12) gradually increases from the position adjacent to the hinge of the shell (1) to the position away from the hinge.
  10. 10. The high temperature warning insulation sheath of claim 9, wherein: The maximum thickness of the thermosensitive expansion paste (12) is not less than 5mm.

Description

High-temperature early-warning insulating sheath Technical Field The invention relates to the technical field of electric power and electrical equipment, in particular to a high-temperature early warning insulating sheath for a cable wire end. Background The insulating sheath is often used in the cable connector end of a transformer or other related power fields to perform an insulating function and protect the wire cable end from corrosion. However, conventional insulating jackets have problems in that the jackets are generally made of silica gel or plastic, but long-term overheating may cause material aging or even burning out, which may cause secondary failure. Moreover, when the cable is overheated, the sheath can not visually reflect, and infrared detection or manual inspection is needed, so that the efficiency is low and hidden danger is easily omitted. In the prior art, chinese patent publication No. CN217468099U discloses a transformer area insulating sheath capable of measuring temperature, and the heating condition of the connection part of an internal terminal or a distribution transformer area wire and a wiring terminal is intuitively reflected by arranging a temperature measuring display column on the insulating sheath. The temperature measurement display column is fixed on the insulating sheath, when a cable in the sheath heats, heat is isolated by the insulating sheath, so that temperature display is delayed, the temperature measurement display column is greatly influenced by external temperature, when outdoor sunlight is strong, manual inspection can cause difficulty in naked eye identification, hidden danger is omitted, and meanwhile, the structure is relatively complex, so that the cost is high. Disclosure of Invention The invention aims to provide a high-temperature early-warning insulating sheath so as to solve the problems in the prior art proposed by the background technology. In order to achieve the purpose, the invention provides the following technical scheme that the high-temperature early warning insulating sheath comprises: The shell is formed by wrapping two groups of wire and cable ends in a combined mode, and the two shells are hinged; The shell is provided with the thermosensitive structure, and the thermosensitive structure fails when the wire and cable ends heat; and the limiting structures are distributed on the shell and used for limiting, when the thermosensitive structure fails, the limiting structures are released, and the two shells are sprung by springs distributed at the closed positions of the shells. Preferably, the limiting structure comprises two groups of i-shaped buckles, wherein one i-shaped buckle is provided with an inserting strip, one side of the other i-shaped buckle facing the inserting strip is provided with a slot, the inserting strip is matched with the slot to combine the two i-shaped buckles, and the two combined i-shaped buckles are clamped in the connecting slots on the two shells. Preferably, the thermosensitive structure is a thermosensitive composition mixed by 100 parts of paraffin and 15-25 parts of polyethylene wax, the composition is arranged in the slot, the cutting is fixed in the normal temperature state, and when the melting threshold of the thermosensitive composition is reached, the cutting is separated from the slot to release limit. Preferably, the melting temperature of the thermosensitive composition is 70-90 ℃. Preferably, a heat conducting sheet is further arranged in the shell, and a slot is reserved at the position of the connecting groove of the shell to provide heat conduction for the heat conducting sheet to contact the two groups of I-shaped buckles. Preferably, the limiting structure comprises a fixing band, and the fixing band wraps the two shells to fix the two shells in a clamping manner. Preferably, one end of the fixing strap is bent to form a clamping section, the other end of the fixing strap is provided with a clamping groove, and the fixing strap surrounds the two shells for one circle and then is limited by the clamping section and the clamping groove in a matched mode. Preferably, the thermosensitive structure is a thermosensitive expansion patch, the thermosensitive expansion patches are two groups of thermosensitive expansion patches which are respectively arranged on the inner wall of the shell, the two thermosensitive expansion patches are provided with adhesive layers at the edges, and when the electric wire and cable ends generate heat, the thermosensitive expansion patches are expanded to enable the fixing band clamping parts to generate deformation to release limit. Preferably, the thickness of the heat-sensitive expansion patch gradually increases from the hinge point adjacent to the housing to the hinge point away from the hinge point. Preferably, the maximum thickness of the thermosensitive expansion paste is not less than 5mm. Compared with the prior art, the invention has the beneficial effects th