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CN-121709450-B - Oil immersed reactance type tapping switch

CN121709450BCN 121709450 BCN121709450 BCN 121709450BCN-121709450-B

Abstract

The invention relates to an oil immersed reactance type tapping switch, wherein a driving mechanism comprises a conversion dividing plate, the conversion mechanism comprises an insulating shaft and a conversion frame body, the insulating shaft is driven to rotate through the conversion dividing plate and drives the conversion frame body to rotate, the conversion frame body comprises a movable contact plate A, a conversion insulating plate and a movable contact plate B, a first movable contact and a second movable contact are arranged on the conversion insulating plate and are respectively and electrically connected with the movable contact plate A and the movable contact plate B, a reactor fixed contact A which is always contacted with the movable contact plate A is arranged on the upper portion of a mounting frame, a reactor fixed contact B which is always contacted with the movable contact plate B is arranged on the lower portion of the mounting frame, a plurality of tap fixed contacts are arranged on the mounting frame along the circumferential direction, each tap fixed contact is respectively connected with a corresponding tap on a serial connection coil in a single-phase reactance type voltage regulator, and the first movable contact and the second movable contact are driven to rotate through the conversion insulating plate and are in conversion connection with each tap fixed contact. The invention has compact structure and reliable gear conversion, and increases the number of gear conversion.

Inventors

  • Cai Enyu
  • Lu Xuanyuan
  • RUAN ZUOWEI
  • ZHANG XIAOHUI

Assignees

  • 沈阳东电科发科技有限公司

Dates

Publication Date
20260512
Application Date
20260211

Claims (8)

  1. 1. An oil immersed reactance type tapping switch is characterized by comprising a mounting frame (3), wherein a driving mechanism (1) is arranged on the upper side of the mounting frame (3), a conversion mechanism (2) is arranged in the mounting frame, the driving mechanism (1) comprises a conversion dividing plate (108), the conversion mechanism (2) comprises an insulating shaft (201) and a conversion frame body (203), the insulating shaft (201) drives rotation through the conversion dividing plate (108), the conversion frame body (203) drives rotation through the insulating shaft (201), the conversion frame body (203) comprises a movable contact plate A (2031), a conversion insulating plate (204) and a movable contact plate B (2032) which are sequentially arranged from top to bottom, a first movable contact (2042) and a second movable contact (2043) are arranged on the conversion insulating plate (204), the first movable contact (2042) is electrically connected with the movable contact plate A (2031), the second movable contact (2043) is electrically connected with the movable contact plate B (2032), the upper portion of the mounting frame (3) is provided with a fixed reactor (2032) which is always contacted with the movable contact plate A (2031), the lower movable contact plate (2032) is always contacted with the fixed contact plate (2032), the reactor fixed contact A (302) and the reactor fixed contact B (304) are connected with a reactor in the single-phase reactance type voltage regulator, a plurality of tap fixed contacts (303) are arranged on the installation frame (3) along the circumferential direction, each tap fixed contact (303) is respectively connected with a corresponding tap on a series coil (4) in the single-phase reactance type voltage regulator, and the first moving contact (2042) and the second moving contact (2043) are driven to rotate through a conversion insulating disc (204) and are in conversion connection with each tap fixed contact (303); a rotatable polarity switch (306) is arranged at the bottom of the mounting frame (3), a first switch contact (3061) is arranged on one side of the polarity switch (306), a second switch contact (3062) is arranged on the other side of the polarity switch (306), a shifting fork shaft sleeve (205) is arranged at the lower end of the insulating shaft (201), and a polarity switch shifting fork (2051) for shifting the polarity switch (306) is arranged on the shifting fork shaft sleeve (205); The single-phase reactance type voltage regulator comprises a parallel coil (5) and a series coil (4), when a polarity switch shifting fork (2051) is not contacted with two sides of a polarity switch (306), taps of all the series coils (4) are not connected, when the polarity switch shifting fork (2051) shifts the polarity switch (306) to be contacted with a first switch contact (3061), the series coil (4) is connected with a homopolar end of the parallel coil (5), and when the polarity switch shifting fork (2051) shifts the polarity switch (306) to be contacted with a second switch contact (3062), the series coil (4) is connected with a heteropolar end of the parallel coil (5).
  2. 2. The oil immersed reactance type tapping switch according to claim 1, wherein a tracking movable contact (2021) is arranged at the upper end of the insulating shaft (201), a tracking fixed contact disc (301) electrically connected with the controller (6) is arranged at the upper end of the mounting frame (3), a plurality of tracking fixed contacts are arranged on the lower side of the tracking fixed contact disc (301) along the circumferential direction, the tracking movable contact (2021) is driven to rotate through the insulating shaft (201) and is connected with each tracking fixed contact in a switching mode, and when any tracking fixed contact is in contact with the tracking movable contact (2021), a trigger signal is sent to the controller (6).
  3. 3. The oil-immersed reactance type tapping switch of claim 1, wherein the movable contact plate A (2031) is connected with a first movable contact (2042) through a first flexible connection (2034), the movable contact plate B (2032) is connected with a second movable contact (2043) through a second flexible connection (2035), the reactor static contact A (302) and the reactor static contact B (304) are identical in structure, each of the reactor static contact A (302) and the reactor static contact B (304) comprises an upper clamping block (3021), a lower clamping block (3022) and a clamping block shaft (3023) penetrating through the upper clamping block (3021) and the lower clamping block (3022), a pressure plate (3024) is arranged at the upper end of the clamping block shaft (3023), a spring (3025) is arranged between the pressure plate (3024) and the upper clamping block (3021), the edge of the movable contact plate A (2031) is sleeved on the clamping block shaft (3023), the upper clamping block (3021) of the reactor static contact A (302) and the lower clamping block (3022) penetrates through the reactor static contact B (302), and the other end of the reactor static contact B (302) is connected with the reactor static contact B (304) through the electric clamping block (302).
  4. 4. The oil-immersed reactance type tapping switch according to claim 1, wherein the mounting frame (3) comprises a frame top plate (307) and a frame bottom plate (308), a plurality of frame vertical plates (305) are uniformly distributed between the frame top plate (307) and the frame bottom plate (308) along the circumferential direction, each tapping static contact (303) is respectively mounted on the corresponding frame vertical plate (305), the upper part of any frame vertical plate (305) is provided with the reactor static contact A (302), the lower part is provided with the reactor static contact B (304), and the lower end of the other frame vertical plate (305) is provided with the polarity switch (306), the first switch contact (3061) and the second switch contact (3062).
  5. 5. The oil-immersed reactance type tapping switch according to claim 1, wherein the driving mechanism (1) comprises a forward and reverse rotation motor (101), a transmission assembly, a conversion worm wheel (104), a shifting fork rotating shaft (105), a cam (106) and an energy storage spring (107), the transmission assembly comprises a driving worm (102) and a transmission shaft (103), one end of the transmission shaft (103) is provided with the driving worm wheel (1031), the other end of the transmission shaft is provided with a driven worm (1032), the driving worm (102) is meshed with the driving worm wheel (1031) and is driven to rotate by the forward and reverse rotation motor (101), the driven worm (1032) is meshed with the conversion worm wheel (104), the conversion worm wheel (104) and the cam (106) are sleeved on the shifting fork rotating shaft (105), the conversion worm wheel (104) is provided with a driving pin (1041) for driving the cam (106) to rotate, the shifting fork rotating shaft (105) is driven to rotate by the cam (106), meanwhile, the energy storage spring (107) is driven to stretch by the cam (106), and the shifting fork (105108) is provided with a shifting fork (108) indexing disc 1) at the lower end of the rotating shaft (105).
  6. 6. The oil-immersed reactance type tapping switch according to claim 5, wherein the driving mechanism (1) comprises a mounting frame (109), the mounting frame (109) comprises a chassis (1092), a first support (1091) is arranged on one side of the chassis (1092), a second support (1093) is arranged on the other side of the chassis (1092), one end of the energy storage spring (107) is connected with the cam (106), the other end of the energy storage spring is connected with the first support (1091), the conversion worm wheel (104) is rotatably arranged on the second support (1093), the shift fork rotating shaft (105) sequentially penetrates through the conversion worm wheel (104) and the second support (1093), a worm wheel shaft sleeve capable of rotating is arranged on the second support (1093), the middle part of the conversion worm wheel (104) is sleeved on the worm wheel shaft sleeve, the shift fork rotating shaft (105) is rotatably inserted in the worm wheel shaft sleeve, and the shift fork (1051) is arranged below the second support (1093).
  7. 7. The oil-immersed reactance type tapping switch according to claim 5, wherein the edge of the conversion indexing disc (108) is provided with gear teeth (1082) and locking grooves (1083) in a staggered manner along the circumferential direction, and the end part of the gear teeth (1082) is provided with a gear tooth sliding groove (10821), the indexing disc shifting fork (1051) is driven to rotate through the shifting fork rotating shaft (105) and falls into the next locking groove (1083), and meanwhile the conversion indexing disc (108) is driven to rotate through the indexing disc shifting fork (1051) by one gear tooth (1082).
  8. 8. The oil-immersed reactance type tapping switch of claim 1, wherein when the switching frame body (203) is connected in a bridging mode, the first moving contact (2042) and the second moving contact (2043) are respectively contacted with two adjacent tapping fixed contacts (303) correspondingly, and when the switching frame body (203) is connected in a short circuit mode, the first moving contact (2042) and the second moving contact (2043) are contacted with the same tapping fixed contact (303).

Description

Oil immersed reactance type tapping switch Technical Field The invention relates to the field of power equipment, in particular to an oil immersed reactance type tapping switch. Background In the prior art, the most widely used high and medium voltage regulators are three-phase voltage regulators, and all the three-phase voltage regulators are configured with on-load tap switches with three-phase insulating oil arc extinction. The three-phase on-load tap changer synchronously regulates voltage, and a transition resistor is used for bridging tap voltage difference and limiting current in the voltage regulation process. In addition, in the voltage regulation process, the phenomena of arcing and arc extinction of the electric arc in the insulating oil can also occur, the carbonized oil quality of the insulating oil can be reduced after the electric arc runs for a period of time, the electric arc needs to be regularly maintained, and meanwhile, the voltage regulation precision of the on-load tap-changer is limited by the maximum value of the tapping progression of the electric arc limited by the installation volume. The single-phase reactance voltage regulator is the biggest difference with the existing three-phase voltage regulator in that the single-phase reactance voltage regulator uses two groups of reactance bridging tapping voltage difference current limiting and voltage dividing which are connected in a reverse winding way on an iron core and have the same reactance value parameter, and an on-load tapping switch contact is basically free from electric arcs in the voltage regulating process, so that the on-load tapping switch can be free from maintenance. In addition, the single-phase design can also independently operate according to the difference of the respective line voltages without interference, so that a better voltage balance effect is obtained, and the single-phase reactance voltage regulator can obtain various adjustment ranges through various electric connection modes. However, the on-load tap-changer used by the prior high-voltage and medium-voltage single-phase reactance voltage regulator adopts a structure designed in the United states, has the problems of complex mechanism, high price and the like, and simultaneously, the step-up and step-down gear is still to be further improved. Disclosure of Invention The invention aims to provide an oil immersed reactance type tapping switch which is compact in structure and reliable in gear conversion, and meanwhile, the number of gear conversion is further increased, so that the voltage regulation precision is improved. The aim of the invention is realized by the following technical scheme: The oil-immersed reactance type tapping switch comprises an installation frame, wherein a driving mechanism is arranged on the upper side of the installation frame, a switching mechanism is arranged in the installation frame, the driving mechanism comprises a switching dividing disc, the switching mechanism comprises an insulating shaft and a switching frame body, the insulating shaft is driven to rotate through the switching dividing disc, the switching frame body is driven to rotate through the insulating shaft, the switching frame body comprises a movable contact disc A, a switching insulating disc and a movable contact disc B which are sequentially arranged from top to bottom, a first movable contact and a second movable contact are arranged on the switching insulating disc, the first movable contact is electrically connected with the movable contact disc A, the second movable contact is electrically connected with the movable contact disc B, a reactor fixed contact A which is always contacted with the movable contact disc A is arranged on the upper portion of the installation frame, a reactor fixed contact B which is always contacted with the movable contact disc B is arranged on the lower portion of the installation frame, the reactor fixed contact A and the reactor fixed contact B are all connected with a reactor in a single-phase reactance voltage regulator, a plurality of tap fixed contacts are arranged on the installation frame along the circumferential direction, the tap fixed contacts are respectively connected with a single-phase reactance series of corresponding tap contacts in the single-phase reactance voltage regulator, and the tap fixed contacts are connected with the first movable contact through the switching mechanism and the corresponding tap rotating contacts and the switching insulating disc. The upper end of the insulating shaft is provided with a tracking moving contact, the upper end of the mounting frame is provided with a tracking fixed contact disc electrically connected with the controller, the lower side of the tracking fixed contact disc is provided with a plurality of tracking fixed contacts along the circumferential direction, the tracking moving contact is driven to rotate through the insulating shaft and is connected with each