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CN-122025468-A - Vacuum contact device

CN122025468ACN 122025468 ACN122025468 ACN 122025468ACN-122025468-A

Abstract

The invention discloses a vacuum contact device, which comprises a shell, a metal conducting rod, a first extraction electrode, a second extraction electrode and a third extraction electrode, wherein the shell is provided with a first electrode and a second electrode; the high-speed switching device has the advantages that the high-speed switching device can convert and switch vacuum contacts in the axial movement mode of a double-power transfer switch, an alternating-current contactor, a starter, a disconnecting switch and an explosion-proof switch by using quick arc extinction, the vacuum contacts are in a vacuum container in a closed environment, the metal conducting rod at the movable end of the contacts and the metal sealing corrugated pipe are controlled by external force to do ultra-high-speed axial movement, the mechanical electric conversion and switching function is realized, the electronic switching speed can be achieved, and the problems that the traditional high-speed conversion and switching loss is high, the environment requirement is harsh, the load influence is large and the like are solved.

Inventors

  • Qiu Hengcan
  • SUN YUNBIN
  • XIAO XIAOHUA
  • HAN ZHANLI
  • Zhang Jiaolai

Assignees

  • 杭州开先河电气有限公司

Dates

Publication Date
20260512
Application Date
20260330

Claims (10)

  1. 1. A vacuum contact device, comprising: The device comprises a shell (1), a metal conducting rod (2), a first extraction electrode (3), a second extraction electrode (4) and a third extraction electrode (5); the first extraction electrode (3) is arranged at one end of the shell (1); The third extraction electrode (5) is arranged at the other end of the shell (1); the second extraction electrode (4) is arranged on the side surface of the shell (1); The second extraction electrode (4) extends to the inside of the shell (1) and is arranged at the outer side of the metal conducting rod (2), one end of the metal conducting rod (2) can be abutted against the first extraction electrode (3) and the second extraction electrode (4), and the other end of the metal conducting rod (2) is connected with the third extraction electrode (5); One end of the first extraction electrode (3) at the inner side of the shell (1) is provided with a first contact static end (6), and one end of the metal conducting rod (2) is provided with a first contact movable end (7) which can be propped against the first contact static end (6); one end of the metal conducting rod (2) is fixedly connected with a metal ring (11), one end of the metal ring (11) facing the second extraction electrode (4) is provided with a second contact movable end (8), and one end of the second extraction electrode (4) facing the metal ring (11) is provided with a second contact static end (9); The second extraction electrode (4) is in insulation relation with the metal conducting rod (2), the third extraction electrode (5) is connected with the output of the telescopic device, and the telescopic device stretches the third extraction electrode (5) to realize switching among three modes of the contact of the static end and the moving end of the first contact, the contact of the static end and the moving end of the second contact and the non-contact of the static end and the moving end of the first contact and the non-contact of the static end and the moving end of the second contact.
  2. 2. A vacuum contact device according to claim 1, characterized in that the outer side of the metal conducting rod (2) is sleeved with a T-shaped insulating sleeve (10), one end of the insulating sleeve (10) is propped against the metal ring (11), and the second extraction electrode (4) is sleeved on the outer side of the insulating sleeve (10).
  3. 3. The vacuum contact device according to claim 1, wherein the first extraction electrode (3) is a cylindrical structure, the cylindrical structure is arranged at one end of the inner side of the housing (1) and is communicated with the outer side of the housing (1), and an annular first shielding cover (12) arranged at the outer sides of the first contact static end (6) and the first contact movable end (7) is connected to the outer side of one end of the inner side of the housing (1).
  4. 4. A vacuum contact device according to claim 3, characterized in that the side of the second extraction electrode (4) facing the metal ring (11) is provided with a ring-shaped second shield (13) arranged outside the second contact stationary end (9) and the second contact movable end (8).
  5. 5. A vacuum contact device according to claim 1, characterized in that the two ends of the housing (1) are provided with a first sealing shoulder cap (14) and a second sealing shoulder cap (15), the first sealing shoulder cap (14) is fixedly arranged on the outer side of the first extraction electrode (3), and the second sealing shoulder cap (15) is sleeved on the outer side of the third extraction electrode (5).
  6. 6. The vacuum contact device according to claim 5, wherein the inner side of the second sealing shoulder cap (15) is in sealing connection with a metal corrugated pipe (16), the other end of the metal corrugated pipe (16) is in sealing connection with the outer side wall of the metal conducting rod (2), and the inner side of the second sealing shoulder cap (15) is fixedly provided with an outer guiding sliding sleeve (17) which is arranged on the inner side of the metal corrugated pipe (16) and on the outer side of the metal conducting rod (2).
  7. 7. A vacuum contact device according to claim 5, characterized in that the housing (1) is of a segmented structure, the second extraction electrode (4) is divided into a plate-shaped structure (19) and an extraction structure (18), the outer sides of the segmented structure are sealed and fixed on two side walls of the second extraction electrode (4) of the plate-shaped structure (19), and the extraction structure (18) is arranged on one side or two sides of the plate-shaped structure.
  8. 8. A vacuum contact device according to claim 7, characterized in that the lead-out structure (18) is any one of a bar-shaped structure, a T-shaped structure and an L-shaped structure; Wherein the lead-out structure (18) of the L-shaped structure faces the first lead-out electrode (3) or the third lead-out electrode (5).
  9. 9. A vacuum contact device according to claim 4, characterized in that the diameter of the first shield (12) is smaller than the diameter of the second shield (13).
  10. 10. A vacuum contact device according to claim 4, characterized in that the first extraction electrode (3) and the third extraction electrode (5) are each provided with a fixed internal thread at the separated ends.

Description

Vacuum contact device Technical Field The invention relates to the field of vacuum tubes, in particular to a vacuum contact device. Background Currently, in medium-voltage power equipment such as a dual-power transfer switch, an alternating-current contactor, a starter, an isolating switch, a circuit breaker, an explosion-proof switch and the like, a widely used high-current contact device is generally composed of a moving contact and a fixed contact. The working principle is that the movable end connecting rod is controlled by external force to axially move so as to close or separate the movable contact and the static contact, thereby realizing the single on and off functions of the circuit. However, the structure of this type of contact device determines that it can only realize on-off control of a single path, and it is difficult to complete switching or switching of the power lines in a single independent partitioned chamber (i.e., to realize an internal two-way or multi-station switching function). Aiming at the multi-station requirement, a three-station vacuum arc-extinguishing chamber with closing, isolating and grounding functions is also disclosed in the prior literature. The structure mainly focuses on realizing breaking and grounding protection of a circuit, and has the defects that firstly, the requirements of rapid conversion and switching of power equipment in a loaded state or a fault state cannot be met, otherwise, short circuit and even damage of a vacuum arc extinguishing chamber are easy to occur, secondly, the capability of rapid arc extinguishing or effective constraint of an electric arc is lacking, thirdly, the contact structure is difficult to bear mechanical impact force caused by dispersion high-speed switching, the reliability of a product in the rapid conversion process is influenced, and fourthly, the performance of a multi-potential voltage-resistant process in the aspects of shock resistance, friction resistance and the like is still lacking. Disclosure of Invention The invention aims to solve the problems in the prior art and provide a multi-station vacuum contact device capable of realizing conversion and switching functions under a loaded state, which is suitable for medium-voltage power equipment such as a dual-power transfer switch, a vacuum circuit breaker, a vacuum alternating-current contactor, a starter, an isolating switch, an explosion-proof switch and the like. The technical scheme is that the vacuum contact device comprises: The device comprises a shell, a metal conducting rod, a first extraction electrode, a second extraction electrode and a third extraction electrode; The first extraction electrode is arranged at one end of the shell; the third extraction electrode is arranged at the other end of the shell; the second extraction electrode is arranged on the side surface of the shell; The second extraction electrode extends to the inside of the shell and is arranged at the outer side of the metal conducting rod, one end of the metal conducting rod can be propped against the first extraction electrode and the second extraction electrode, and the other end of the metal conducting rod is connected with the third extraction electrode; One end of the first leading-out electrode, which is arranged at the inner side of the shell, is provided with a first contact static end, and one end of the metal conducting rod is provided with a first contact movable end which can be propped against the first contact static end; One end of the metal conducting rod is fixedly connected with a metal ring, one end of the metal ring, facing the second extraction electrode, is provided with a second contact moving end, and one end of the second extraction electrode, facing the metal ring, is provided with a second contact static end; the second extraction electrode is connected with the output of the telescopic device, and the telescopic device stretches the third extraction electrode to realize switching among three modes of contact of the static end and the moving end of the first contact, contact of the static end and the moving end of the second contact and non-contact of the static end and the moving end of the first contact and the moving end of the second contact. Preferably, the outer side of the metal conducting rod is sleeved with a T-shaped insulating sleeve, one end of the insulating sleeve is propped against the metal ring, and the second extraction electrode is sleeved on the outer side of the insulating sleeve. Preferably, the first leading-out electrode is a cylindrical structure, the cylindrical structure is arranged at one end of the inner side of the shell and is communicated with the outer side of the shell, and the cylindrical structure is connected with an annular first shielding cover arranged at the outer side of the fixed end and the movable end of the first contact at one end of the inner side of the shell. Preferably, one side of the second extraction electrode