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CN-115732261-B - Isolation knife and isolation switch

CN115732261BCN 115732261 BCN115732261 BCN 115732261BCN-115732261-B

Abstract

The invention discloses an isolation knife switch which comprises an isolation blade, a magnetic lock plate and a pressing force adjusting column, wherein the isolation blade is provided with a movable contact part used for being electrically connected with a fixed contact, the movable contact part comprises a plurality of contact fingers, gaps are reserved between two adjacent contact fingers, the magnetic lock plate is used for pressing the isolation blade and comprises a magnetic lock plate body and the pressing force adjusting column arranged on the magnetic lock plate body, the length of the pressing force adjusting column protruding outwards of the magnetic lock plate body is adjustable, and the pressing force adjusting column is in one-to-one press fit with each contact finger. The invention reduces the manufacturing, mounting and debugging cost of the high-current isolating switch, the pressure of the contact surface of the contact is more convenient to adjust, the pressure is uniform when the contact surface is pressed independently, the contact surface is good, and the contact pressure can reach more than 2000N through test, thereby achieving good dynamic and thermal stability. The invention also discloses an isolating switch with the isolating knife.

Inventors

  • YANG BAOFENG
  • ZHANG XIAOYONG
  • HE BING
  • WANG TING
  • LI QIANG
  • WANG PEIREN
  • HUANG SHI
  • QU XIANG
  • ZHAO WEIBIN

Assignees

  • 西安高压电器研究院股份有限公司

Dates

Publication Date
20260505
Application Date
20221118

Claims (11)

  1. 1. An isolating blade, comprising: the isolating blade is provided with a movable contact part for being electrically connected with the fixed contact, the movable contact part comprises a plurality of contact fingers (200), and a gap is reserved between two adjacent contact fingers (200); The magnetic lock plate (400) is used for compressing the isolation blade, the magnetic lock plate (400) comprises a magnetic lock plate body (401) and compression force adjusting columns (402) arranged on the magnetic lock plate body (401), the length of the compression force adjusting columns (402) protruding out of the magnetic lock plate body (401) is adjustable, and the compression force adjusting columns (402) are in one-to-one corresponding compression fit with the contact fingers (200); The isolating blade comprises a main blade (100) and the contact finger (200) which is detachably arranged at one end of the main blade (100); One end of the main blade (100) is provided with touch finger seats corresponding to the touch fingers (200) one by one, two adjacent touch finger seats are separated by a cutting seam (104), and the touch fingers (200) are detachably arranged on the touch finger seats; The touch finger seats comprise a first touch finger seat (102) and a second touch finger seat (103), wherein the first touch finger seat (102) and the second touch finger seat (103) are multiple and distributed in a staggered mode, and the length of the first touch finger seat (102) is larger than that of the second touch finger seat (103); The touch finger (200) comprises a first touch finger (201) and a second touch finger (202), the first touch finger (201) and the second touch finger (202) are multiple, the length of the second touch finger (202) is greater than that of the first touch finger (201), the first touch finger (201) is detachably fixed on the first touch finger seat (102), and the second touch finger (202) is detachably fixed on the second touch finger seat (103).
  2. 2. The isolating blade according to claim 1, wherein the main blade (100) comprises a blade body (101) and a blade mounting portion at one end of the blade body (101) for mounting the contact finger (200), the blade mounting portion having a thickness smaller than the thickness of the blade body (101); The contact finger (200) comprises a contact finger main body and a contact finger mounting part which is positioned at one end of the contact finger main body and is used for being attached and connected with the blade mounting part, the thickness of the contact finger mounting part is smaller than that of the contact finger main body, the thickness of the contact finger main body is the same as that of the blade main body (101), and the sum of the thicknesses of the blade mounting part and the contact finger mounting part is the same as that of the blade main body (101).
  3. 3. The disconnecting switch blade according to claim 2, characterized in that the two surfaces of the blade body (101) in the thickness direction are a first blade surface (1011) and a second blade surface (1012), respectively, and that one side surface of the blade mounting portion is located in the same plane as the first blade surface (1011) such that an insertion gap is formed between the blade mounting portion and the second blade surface (1012); the contact finger mounting part is inserted into the embedded notch, is attached to the blade mounting part and is fixedly connected with the blade mounting part.
  4. 4. The isolating blade according to claim 1, characterized in that the end surfaces of the first contact finger (201) and the end of the second contact finger (202) remote from the main blade (100) lie in the same plane.
  5. 5. The isolating blade according to claim 1, wherein the main blade (100) comprises a blade body (101) and the contact finger holder, the contact finger holder comprising a contact finger holder body and a blade mounting portion at one end of the contact finger holder body for mounting the contact finger (200), the blade mounting portion having a thickness smaller than the contact finger holder body, the contact finger holder body having a thickness identical to the thickness of the blade body (101); the contact finger (200) comprises a contact finger main body and a contact finger mounting part which is positioned at one end of the contact finger main body and is used for being attached and connected with the blade mounting part, the thickness of the contact finger mounting part is smaller than that of the contact finger main body, the thickness of the contact finger main body is the same as that of the contact finger seat main body, and the sum of the thicknesses of the blade mounting part and the contact finger mounting part is the same as that of the contact finger seat main body.
  6. 6. The isolating blade according to claim 5, wherein two surfaces of the blade body (101) in the thickness direction are a first blade surface (1011) and a second blade surface (1012), respectively, and the two surfaces of the finger rest body in the thickness direction are in the same plane as the first blade surface (1011) and the second blade surface (1012), respectively; a side surface of the blade mounting portion and the first blade surface (1011) are located in the same plane so that an insertion gap is formed between the blade mounting portion and the second blade surface (1012); the contact finger mounting part is inserted into the embedded notch, is attached to the blade mounting part and is fixedly connected with the blade mounting part.
  7. 7. The isolating switch blade according to claim 1, wherein the contact finger seat and the contact finger (200) are fixed by a screw, a mounting screw hole in threaded fit with the screw is formed in the contact finger seat, and a fixing hole through which the screw passes is formed in the contact finger (200).
  8. 8. The isolating switch blade according to claim 1, wherein the isolating blades are two parallel arranged blades, two opposite sides of the main blades (100) are respectively provided with a fixing strip (300), the fixing strips (300) are positioned at the positions of the contact finger seats and are fixed on the contact finger seats through fasteners, pull rods for connecting the two main blades (100) are arranged at the fixing strips (300), supporting sleeves are sleeved on the pull rods, and two ends of each supporting sleeve are abutted to the fixing strips (300).
  9. 9. The isolating blade as in any one of claims 1-8, wherein the two sides of the magnetic lock plate body (401) are bent to form a reinforcing flap (4011) toward the side where the first surface of the magnetic lock plate body (401) is located, the pressing force adjusting post (402) protrudes from the second surface of the magnetic lock plate body (401), and the first surface and the second surface of the magnetic lock plate body (401) are opposite surfaces.
  10. 10. The isolating blade according to any one of claims 1-8, wherein the compression force adjusting post (402) is a threaded member.
  11. 11. An isolating switch comprising an isolating blade, wherein the isolating blade is an isolating blade according to any one of claims 1-10.

Description

Isolation knife and isolation switch Technical Field The invention relates to the technical field of isolating switches, in particular to an isolating knife and an isolating switch. Background In the past, the dynamic and thermal stability performance needs to be ensured in the use of a high-voltage isolating switch in a large current household so as to avoid the burning of a moving contact and a static contact. In general, in order to verify the dynamic thermal stability of a high-voltage isolating switch in a large current house, a dynamic thermal stability test is required, wherein the dynamic thermal stability test comprises a short-time withstand current test and a peak withstand current test, and the capability of the isolating switch in a closed state of resisting electric power, heating and the like is verified. In the prior art, the isolating switch blade of the isolating switch comprises an isolating switch blade and magnetic lock plates arranged on two sides of the isolating switch blade, wherein the magnetic lock plates are used for pressing the isolating switch blade on the static contact. The isolating switch blade in the prior art is of an integral structure, when the isolating switch is in a closed state, the isolating switch blade is in integral surface contact with the static contact, the thickness of the blade represents the main performance parameter of the isolating switch, namely, the isolating switch with large current can meet the performance requirement only by the thicker isolating switch blade. The thicker the thickness of the isolating blade, the higher its strength, the less deformable it is. Although the disconnector has a magnetic lock plate that applies pressure to the disconnecting blade to keep the two disconnecting blades clamped against the stationary contact. However, if the isolating blade is too thick, there is also a problem that the thermal stability of the isolating switch is poor due to insufficient and uneven contact pressure between the isolating blade and the stationary contact. Therefore, how to improve the dynamic thermal stability of the isolating switch is a technical problem that needs to be solved by those skilled in the art. Disclosure of Invention In view of the above, the present invention is directed to an isolating blade to improve the thermal stability of an isolating switch; another object of the present invention is to provide an isolating switch having the isolating blade described above. In order to achieve the above object, the present invention provides the following technical solutions: An isolating blade comprising: the isolating blade is provided with a movable contact part which is used for being electrically connected with the fixed contact, the movable contact part comprises a plurality of contact fingers, and a gap is reserved between two adjacent contact fingers; the magnetic lock plate is used for compressing the isolating blade and comprises a magnetic lock plate body and compression force adjusting columns arranged on the magnetic lock plate body, the compression force adjusting columns are protruded outwards from the length of the magnetic lock plate body, and the compression force adjusting columns are in one-to-one compression fit with the contact fingers. Optionally, in the isolating blade, the isolating blade includes a main blade and the contact finger detachably disposed at one end of the main blade. Optionally, in the above isolating blade, the main blade includes a blade body and a blade mounting portion located at one end of the blade body for mounting the contact finger, and a thickness of the blade mounting portion is smaller than a thickness of the blade body; The contact finger comprises a contact finger main body and a contact finger mounting part which is positioned at one end of the contact finger main body and is used for being attached to the blade mounting part, the thickness of the contact finger mounting part is smaller than that of the contact finger main body, the thickness of the contact finger main body is the same as that of the blade main body, and the sum of the thicknesses of the blade mounting part and the contact finger mounting part is the same as that of the blade main body. Optionally, in the above-mentioned isolating blade, two surfaces of the blade body in a thickness direction are a first blade surface and a second blade surface, respectively, and a side surface of the blade mounting portion and the first blade surface are located in the same plane, so that an insertion notch is formed between the blade mounting portion and the second blade surface; the contact finger mounting part is inserted into the embedded notch, is attached to the blade mounting part and is fixedly connected with the blade mounting part. Optionally, in the above isolating blade, one end of the main blade is formed with contact finger seats corresponding to the contact fingers one by one, two adjacent contact finger seats ar