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CN-224232414-U - Composite insulator

CN224232414UCN 224232414 UCN224232414 UCN 224232414UCN-224232414-U

Abstract

The application discloses a composite insulator which comprises an insulating tube, umbrella skirts positioned on the periphery of the insulating tube and two flanges respectively arranged at two ends of the insulating tube, wherein the insulating tube is a hollow round tube, supporting pieces are arranged inside the two ends of the insulating tube, each supporting piece is of a solid cylindrical structure, the supporting pieces are coaxially arranged with the insulating tube and extend inwards from the end part of the insulating tube, the outer diameter of each supporting piece is matched with the inner diameter of the insulating tube, and the flanges are pressed and connected on the outer side of the end part of the insulating tube in a pressing mode, so that the insulating tube, the supporting pieces and the flanges are tightly connected. The composite insulator provided by the application realizes the compression joint of the hollow insulating tube and the flange by using the supporting piece, ensures the connection strength and the tightness between the hollow insulating tube and the flange, effectively avoids the failure of the composite insulator at the connection part of the flange and the insulating tube, can fully exert the structural strength of the composite insulator, saves a long-time glue solution curing process compared with the traditional glue bonding technology, and improves the production efficiency.

Inventors

  • LI PEINING
  • ZHANG LINJUN

Assignees

  • 江苏神马电力股份有限公司

Dates

Publication Date
20260512
Application Date
20250523

Claims (11)

  1. 1. The utility model provides a composite insulator, includes the insulating tube, is located the umbrella skirt of insulating tube periphery and set up respectively in two flanges at insulating tube both ends, its characterized in that, the insulating tube is hollow pipe, the inside support piece that all is equipped with in insulating tube's both ends, support piece is solid cylinder structure, support piece with the coaxial setting of insulating tube and certainly the tip of insulating tube inwards extends, support piece's external diameter with the internal diameter phase-match of insulating tube, the flange crimping is in the tip outside of insulating tube makes the insulating tube support piece flange zonulae occludens.
  2. 2. The composite insulator of claim 1, wherein the flange comprises a flange cylinder and a flange plate, the flange cylinder is of a hollow cylinder structure, the inner diameter of the flange cylinder is matched with the outer diameter of the insulating tube, and the flange plate covers one end of the flange cylinder.
  3. 3. The composite insulator of claim 2, wherein the flange barrel is provided with a fillet at the end remote from the flange.
  4. 4. The composite insulator of claim 1, wherein both ends of the support member are provided with chamfers.
  5. 5. The composite insulator of claim 2, wherein the support member has a length that is 10-20 mm longer than the length of the flange barrel.
  6. 6. The composite insulator of claim 1, wherein the outer diameter of the support member is 0.1-0.5 mm smaller than the inner diameter of the insulating tube.
  7. 7. The composite insulator of claim 2, wherein the outer diameter of the insulating tube is 0.1-0.5 mm smaller than the inner diameter of the flanged cylinder.
  8. 8. The composite insulator of claim 1, wherein the insulator tube and the support member are each formed from a fiber-reinforced composite material.
  9. 9. The composite insulator of claim 2, wherein a sealing structure is arranged at a joint of one end of the flange barrel away from the flange plate and the insulating tube, the sealing structure comprises a sealing ring and sealing glue, the sealing ring is simultaneously abutted against the outer periphery of the insulating tube and the inner periphery of the flange barrel, the sealing glue fills a gap between the flange barrel and the insulating tube, and the joint of the end face of the flange barrel away from the flange plate and the insulating tube is coated by the sealing glue, so that the sealing ring, the flange barrel and the insulating tube are in sealing connection.
  10. 10. The composite insulator of claim 2, wherein the flange cylinder, the insulating tube and the supporting member are connected by a crimping technique, a distance between one end of a target crimping zone on the flange cylinder, which is close to the flange, and the flange is 15-25 mm, and a distance between the other end of the target crimping zone, which is far away from the flange, and an end face of the flange cylinder, which is far away from the flange, is 5-10 mm.
  11. 11. The composite insulator of claim 10, wherein the target crimp zone comprises a plurality of sub-crimp zones, any adjacent two of the sub-crimp zones overlapping 0-20 mm in an axial direction of the insulating tube.

Description

Composite insulator Technical Field The application relates to the field of power transmission and transformation insulating equipment, in particular to a composite insulator. Background At present, most of failures of hollow composite insulator structures occur at the joint of the flange and the insulating tube, and the connection of the flange and the insulating tube is one of the processing difficulties of the insulator. The insulating tube is generally made of a composite material, and the common connection mode of the composite material is gluing and crimping. The glue joint technology is to form a colloid interface between the inner surface of the flange and the outer surface of the insulating tube by adopting high-strength glue such as epoxy resin and the like to finish assembly, and the method can simultaneously meet the requirements of connection strength and tightness, but the glue solution has long curing time and is inconvenient for field operation; in addition, most of the glue-binding structures cannot fully exert the optimal performance of the insulating tube or the flange, namely, the composite insulator can possibly generate structural failure under the working condition of being lower than the mechanical strength such as bending resistance, tensile resistance or compression resistance of the insulating tube. The existing crimping technology is only suitable for solid composite bars, the applied acting force is large, and the direct application to an insulating pipe can lead to pipe breakage so as to influence the strength and sealing requirements of the product. Disclosure of utility model Aiming at the defects of the prior art, the main purpose of the application is to provide the composite insulator, the support piece is utilized to realize the compression joint of the hollow insulating tube and the flange, the requirements of stable connection and sealing of the hollow insulating tube and the flange are ensured, the quick assembly of the composite insulator can be realized, and the production efficiency is improved. In order to solve the technical problems, the composite insulator comprises an insulating tube, umbrella skirts positioned on the periphery of the insulating tube and two flanges respectively arranged at two ends of the insulating tube, wherein the insulating tube is a hollow round tube, supporting pieces are arranged inside the two ends of the insulating tube, the supporting pieces are of solid cylindrical structures, the supporting pieces are coaxially arranged with the insulating tube and extend inwards from the end parts of the insulating tube, the outer diameter of the supporting pieces is matched with the inner diameter of the insulating tube, and the flanges are in crimping connection with the outer sides of the end parts of the insulating tube, so that the insulating tube, the supporting pieces and the flanges are tightly connected. The support piece is utilized to realize the compression joint of the hollow insulating tube and the flange, so that the connection strength and the tightness between the hollow insulating tube and the flange are ensured, the failure of the composite insulator at the joint of the flange and the insulating tube is effectively avoided, the structural strength of the composite insulator can be fully exerted, compared with the traditional gluing technology, the long-time glue solution curing process is omitted, and the production efficiency is improved. The flange comprises a flange cylinder and a flange plate, wherein the flange cylinder is of a hollow cylinder structure, the inner diameter of the flange cylinder is matched with the outer diameter of the insulating tube, and one end of the flange cylinder is covered by the flange plate. Wherein, the other end of the flange cylinder far away from the flange plate is provided with a fillet. Wherein, the both ends of support piece are equipped with the chamfer. The length of the support piece is 10-20 mm longer than that of the flange cylinder. Wherein the outer diameter of the supporting piece is 0.1-0.5 mm smaller than the inner diameter of the insulating tube. Wherein the outer diameter of the insulating tube is 0.1-0.5 mm smaller than the inner diameter of the flange cylinder. Wherein, insulating tube and support piece all adopt fiber reinforcement combined material to make. The sealing structure comprises a sealing ring and sealing glue, wherein the sealing ring is simultaneously abutted against the periphery of the insulating tube and the inner periphery of the flange tube, the sealing glue fills a gap between the flange tube and the insulating tube, and the sealing structure is coated on the connecting part of the end face of the flange tube, which is far away from the flange, and the insulating tube, so that the sealing ring, the flange tube and the insulating tube are in sealing connection. The flange cylinder, the insulating tube and the supporting piece are connected by adopting a cr