Search

CN-122025448-A - Three-station parallel load switch blade, processing method and switch

CN122025448ACN 122025448 ACN122025448 ACN 122025448ACN-122025448-A

Abstract

The invention relates to power equipment, in particular to a three-station parallel load switch blade, a processing method and a switch, wherein the three-station parallel load switch blade comprises a conductive section and an anti-ablation section, the conductive section is made of T2Y copper, the anti-ablation section is made of CuW70 copper tungsten alloy, the conductive section and the anti-ablation section are respectively formed by forging, one end of the conductive section is used for being connected with a switch contact, the anti-ablation section is coated outside the other end of the conductive section and is connected with the conductive section, the anti-ablation section is used for being connected with a switch static contact and a switch grounding static contact seat, a first connecting hole is formed in one end of the conductive section connected with the switch contact, and the conductive section is connected with the switch contact through a first rivet penetrating through the first connecting hole. The invention can give consideration to the conductivity, the ablation resistance and the high mechanical reliability.

Inventors

  • HUANG XIAOKANG
  • LIN ZHONGBO
  • ZHOU YANZHAO
  • LI KAIMIN
  • DUAN MIN
  • TANG WENTAO
  • YUAN WEIBIN
  • ZHANG JIAAO

Assignees

  • 北京双杰电气股份有限公司

Dates

Publication Date
20260512
Application Date
20260122

Claims (10)

  1. 1. The utility model provides a three-station parallel load switch blade, its characterized in that includes conducting segment (11), anti-ablation section (12), conducting segment (11) are made by T2Y copper, anti-ablation section (12) are made by CuW70 copper tungsten alloy, conducting segment (11) anti-ablation section (12) are through forging and pressing shaping respectively, conducting segment (11) one end is used for being connected with switch contact (21), anti-ablation section (12) cladding is in outside the other end of conducting segment (11) and with conducting segment (11) are connected, anti-ablation section (12) are used for being connected with switch stationary contact (23), switch ground static contact seat (22).
  2. 2. The three-position parallel load switch blade according to claim 1, characterized in that one end of the conductive segment (11) connected with the switch contact (21) is provided with a first connection hole (111), the conductive segment (11) being connected with the switch contact (21) by a first rivet passing through the first connection hole (111).
  3. 3. The three-station parallel load switch blade according to claim 2, wherein positioning pin holes are respectively formed in two sides of the ablation-resistant section (12) in the width direction, positioning pin holes are respectively formed in two sides of the conductive section (11) in the width direction, two positioning pins (13) respectively penetrate through the ablation-resistant section (12) and the positioning pin holes of the conductive section (11) to connect the ablation-resistant section (12) and the conductive section (11), and the first rivet and the positioning pins (13) are made of T2Y copper.
  4. 4. A three-position parallel load switch blade according to claim 3, characterized in that the two sides of the conductive section (11) in the width direction are respectively provided with a second dovetail groove (112), and the second dovetail grooves (112) are used for being lapped with the switch grounding static contact seat (22).
  5. 5. The three-position parallel load switch blade according to claim 4, wherein the first rivet is cold-riveted by a pneumatic riveter, the crimping force of the first rivet during riveting is 8-10 kN, and the conductive segment (11) and the ablation-resistant segment (12) are silver-plated.
  6. 6. The processing method of the three-station parallel load switch blade is characterized by comprising the following steps of: Selecting a conductive section (11) and an ablation resistant section (12) which meet the size requirement, wherein the conductive section (11) is made of T2Y copper, the ablation resistant section (12) is made of CuW70 copper tungsten alloy, The conductive section (11) and the ablation resistant section (12) are respectively formed by hot forging, the forging temperature is 800-900 ℃, the forging pressure is more than or equal to 10MPa, The conductive section (11) and the ablation resistant section (12) after hot forging are riveted through positioning holes to form a blade, Annealing the interconnected conductive segments (11) and the ablation resistant segments (12), Carrying out outline stamping on the conductive section (11) and the ablation resistant section (12) after annealing treatment, Processing a first connecting hole (111), a positioning pin hole, a first dovetail groove (113) and a second dovetail groove (112), Grinding the contact end surfaces of the conductive segment (11) and the ablation resistant segment (12), wherein the flatness of the contact end surfaces of the conductive segment (11) and the ablation resistant segment (12) is not more than 0.02mm, Silver plating the contact end surfaces of the conductive section (11) and the ablation resistant section (12) after grinding, Passivating the non-contact areas of the conductive segment (11) and the ablation resistant segment (12).
  7. 7. The method for machining the three-station parallel load switch blade according to claim 6, wherein the thickness of the coating is more than or equal to 5 μm.
  8. 8. The method for machining a three-position parallel load switch blade according to claim 7, characterized in that the conductive segment (11) is connected to the switch contact (21) by a first rivet passing through the first connecting hole (111), the first rivet is cold-riveted by a pneumatic rivet gun, and the crimping force of the first rivet when riveted is 8kN-10kN.
  9. 9. The method for machining the three-station parallel load switch blade according to claim 8, wherein after the conductive segment (11) and the ablation-resistant segment (12) are respectively connected with the switch contact (21) and the switch grounding static contact base (22), surface polishing is performed on the contact end surfaces of the conductive segment (11) and the ablation-resistant segment (12) and the riveted parts of the conductive segment (11).
  10. 10. A switch comprising a three-position parallel load switch blade as claimed in any one of claims 1 to 5.

Description

Three-station parallel load switch blade, processing method and switch Technical Field The invention relates to power equipment, in particular to a three-station parallel load switch blade, a processing method and a switch. Background In a three-station parallel load switch of an electric power system, a blade is used as a core conducting and executing component, and multiple performance requirements of high conductivity, arc ablation resistance, stable mechanical strength, accurate action and the like are simultaneously met. The existing blade is high in ablation resistance, low in conductivity and high in manufacturing cost, or excellent in conductivity, low in melting point, easy to burn and deform under the action of an electric arc, and cannot meet the requirements of electric conduction and ablation resistance, and the contact resistance is high due to the connection mode of the blade and a contact, so that the electric conduction reliability is affected. The cooperative promotion of the electric conduction performance, the ablation resistance and the mechanical reliability is realized. Disclosure of Invention The invention aims to solve the technical problem of providing a three-station parallel load switch blade with high conductivity, ablation resistance and mechanical reliability, a processing method of the blade and a switch. In order to solve the technical problems, the application provides the following technical scheme: the invention discloses a three-station parallel load switch blade, which comprises a conductive section and an anti-ablation section, wherein the conductive section is made of T2Y copper, the anti-ablation section is made of CuW70 copper tungsten alloy, the conductive section and the anti-ablation section are respectively formed by forging, one end of the conductive section is used for being connected with a switch contact, the other end of the conductive section is coated with the anti-ablation section and is connected with the conductive section, and the anti-ablation section is used for being connected with a switch static contact and a switch grounding static contact seat. Further, a first connecting hole is formed in one end, connected with the switch contact, of the conductive segment, and the conductive segment is connected with the switch contact through a first rivet penetrating through the first connecting hole. Further, positioning pin holes are respectively formed in two sides of the ablation-resistant section in the width direction, positioning pin holes are respectively formed in two sides of the conductive section in the width direction, two positioning pins penetrate through the ablation-resistant section and the positioning pin holes of the conductive section respectively to connect the ablation-resistant section and the conductive section, and the first rivet and the positioning pins are made of T2Y copper. Further, second dovetail grooves are respectively formed in two sides of the conductive section in the width direction, and the second dovetail grooves are used for being overlapped with the switch grounding static contact seat. Further, the first rivet is connected in a cold riveting mode through a pneumatic rivet gun, the crimping force during riveting of the first rivet is 8kN-10kN, and the conductive section and the ablation-resistant section are subjected to silver plating treatment. The invention discloses a processing method of a three-station parallel load switch blade, which comprises the following steps: selecting a conductive section and an anti-ablation section which meet the size requirement, wherein the conductive section is made of T2Y copper material, the anti-ablation section is made of CuW70 copper-tungsten alloy material, The conductive section and the ablation resistant section are respectively formed by hot forging, the forging temperature is 800-900 ℃, the forging pressure is more than or equal to 10MPa, Riveting the conductive section and the ablation resistant section after hot forging through positioning holes to form a blade, Annealing the conductive segments and the ablation resistant segments which are connected with each other, Carrying out contour stamping on the conductive section and the ablation resistant section after annealing treatment, Processing a first connecting hole, a positioning pin hole, a first dovetail groove and a second dovetail groove, Grinding the contact end surfaces of the conductive segment and the ablation resistant segment, wherein the flatness of the contact end surfaces of the conductive segment and the ablation resistant segment is not more than 0.02mm, Silver plating the contact end surfaces of the conductive section and the ablation resistant section after grinding, And passivating the non-contact areas of the conductive section and the ablation resistant section. Further, the thickness of the coating is more than or equal to 5 mu m. Further, the conductive section is connected with the switch con