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CN-224216810-U - Low-pressure environment vacuum arc-extinguishing chamber power frequency withstand voltage detection device

CN224216810UCN 224216810 UCN224216810 UCN 224216810UCN-224216810-U

Abstract

The utility model discloses a low-pressure environment vacuum arc-extinguishing chamber power frequency withstand voltage detection device which comprises a cylindrical tank body, a working inner cavity, a lower wiring terminal, a tank cover, a three-way air valve, an air pressure gauge, an air pump and an upper wiring terminal, wherein the tank cover is detachably arranged at an opening of the working inner cavity, the detection assembly comprises at least one group of supporting blocks and a conductive base, the tank body and the tank cover are mutually folded to form a closed working inner cavity in the middle of the detection assembly for placing a sample piece of the vacuum arc-extinguishing chamber to be withstand voltage detected, the air pump for pumping air is arranged on the tank cover of the detection assembly, the air pressure gauge for detecting air pressure data inside the working inner cavity is arranged on the tank cover of the detection assembly, the conductive base and the supporting blocks are arranged for guaranteeing the accuracy of detection environment, so that different altitudes correspond to approximate air pressures according to international standard gas meters, and the external insulation performance is verified through detecting the power frequency withstand voltage condition of the vacuum arc-extinguishing chamber in the device when the low air pressure is detected, so that the environment adaptability and the reliability of the vacuum arc-extinguishing chamber are improved.

Inventors

  • GUO JIANBIN
  • KUANG JING
  • HOU YUHAN
  • WEN XIN

Assignees

  • 中国振华电子集团宇光电工有限公司（国营第七七一厂）

Dates

Publication Date
20260508
Application Date
20250527

Claims (9)

  1. 1. The utility model provides a low atmospheric pressure environment vacuum interrupter power frequency withstand voltage detection device which characterized in that includes: The novel electric power supply device comprises a tank body (1), wherein the tank body (1) is columnar, a working inner cavity (10) with an outward opening is formed in the tank body, and a lower wiring terminal (8) is arranged on the inner side wall of the working inner cavity (10); The tank cover (2) is detachably arranged at the opening of the working inner cavity (10), a sealing rubber cushion is arranged at the joint of the tank cover and the working inner cavity, so that the formed working inner cavity is in a closed state, a three-way air valve (7) communicated with the working inner cavity (10) is arranged on the upper end face of the tank cover, and the three-way air valve (7) is provided with an air pressure gauge (5), an air pump (6) and an upper wiring terminal (80); The detection assembly comprises at least one group of supporting blocks (9) and a conductive base (3), wherein the formed supporting blocks (9) are arranged on the inner side of the working inner cavity (10), the conductive base (3) is arranged on the upper end face, and the formed conductive base (3) and the lower wiring terminal (8) are connected through a metal chain (11).
  2. 2. The low-pressure environment vacuum arc-extinguishing chamber power frequency withstand voltage detection device according to claim 1, wherein a placing groove (100) is arranged on the bottom wall of the inner side of the working inner cavity (10).
  3. 3. The low-pressure environment vacuum arc-extinguishing chamber power frequency withstand voltage detection device according to claim 2, wherein the side wall of the supporting block (9) is provided with a connecting groove (91) with an outward opening.
  4. 4. The device for detecting the power frequency voltage withstand of the vacuum arc extinguishing chamber under the low air pressure environment according to claim 3, wherein a plurality of groups of connecting holes (901) are formed in the inner side wall of the connecting groove (91) and close to the edge.
  5. 5. The device for detecting the power frequency and voltage withstand of the vacuum arc extinguishing chamber under the low-pressure environment according to claim 4, further comprising a connecting assembly, wherein the connecting assembly comprises a fixing belt (92), two groups of connecting protrusions (902) and the connecting protrusions (902) are formed and arranged on one side end face of the fixing belt (92).
  6. 6. The power frequency withstand voltage detection device of the vacuum arc extinguishing chamber in the low-pressure environment according to claim 5, wherein a first fixing hole (30) penetrating up and down is arranged on the upper side end face of the conductive base (3).
  7. 7. The power frequency withstand voltage detection device of the vacuum arc extinguishing chamber in the low-pressure environment according to claim 6, wherein a second fixing hole (90) penetrating through the upper side end face of the supporting block (9) is arranged up and down, and the opening direction of the second fixing hole (90) corresponds to that of the first fixing hole (30).
  8. 8. The low-pressure environment vacuum arc-extinguishing chamber power frequency pressure-resistant detection device according to claim 7, wherein the tank body (1) is made of transparent materials.
  9. 9. The low-pressure environment vacuum arc-extinguishing chamber power frequency withstand voltage detection device according to claim 8, wherein the supporting block (9) and the connecting component are made of insulating materials.

Description

Low-pressure environment vacuum arc-extinguishing chamber power frequency withstand voltage detection device Technical Field The utility model relates to the technical field of power frequency withstand voltage detection of vacuum arc-extinguishing chambers, in particular to a power frequency withstand voltage detection device of a vacuum arc-extinguishing chamber in a low-pressure environment. Background The external insulation withstand voltage is used as an important manufacturing and checking basis of the plateau type vacuum arc-extinguishing chamber, is an important guarantee for safe and reliable operation of the vacuum arc-extinguishing chamber in high-altitude areas, and the insulation performance of the vacuum arc-extinguishing chamber can be obviously reduced in a high-altitude low-pressure environment, so that the power frequency withstand voltage is seriously influenced. At present, domestic plateau type vacuum explosion chamber manufacturers do not have a low-pressure environment vacuum explosion chamber power frequency withstand voltage detection device, and the vacuum explosion chamber power frequency withstand voltage detection device is not used for simulating the power frequency withstand voltage detection under the low-pressure environment in the development and production processes. The high altitude application environment puts a severe technical requirement on the vacuum arc-extinguishing chamber different from the low altitude ground application, and according to the GB311.1 rule, when the altitude is higher than 1000m, the insulation withstand voltage of the vacuum arc-extinguishing chamber is the rated withstand voltage multiplied by the coefficient Ka. Ka=1/(1.1-H*0.0001) Where H-the altitude of the point of use (in meters). The vacuum arc-extinguishing chamber in the high-altitude low-pressure environment causes the reduction of the external insulation performance, seriously affects the power frequency withstand voltage, and the high-altitude application environment provides higher requirements on the insulation structure and the power frequency withstand voltage strength of the vacuum arc-extinguishing chamber. Therefore, the power frequency withstand voltage detection of the plateau vacuum arc-extinguishing chamber is necessary by simulating the high-altitude low-pressure environment. Disclosure of Invention In order to solve the problems, the utility model provides a power frequency withstand voltage detection device for a vacuum arc-extinguishing chamber in a low-pressure environment, and solves the problems that in the prior art, the insulation performance of the vacuum arc-extinguishing chamber is obviously reduced and the power frequency withstand voltage is seriously influenced when the vacuum arc-extinguishing chamber which is not subjected to detection and inspection by a low-pressure concept is in a high-altitude low-pressure environment. The technical scheme adopted by the utility model is that the power frequency withstand voltage detection device of the vacuum arc extinguishing chamber in the low-pressure environment comprises a tank body, wherein the tank body is columnar, a working inner cavity with an outward opening is formed in the tank body, and a lower wiring terminal is arranged on the inner side wall of the working inner cavity; The tank cover is detachably arranged at the opening of the working inner cavity, and a sealing rubber cushion is arranged at the joint of the tank cover and the working inner cavity to enable the working inner cavity to be in a closed state; The detection assembly comprises at least one group of supporting blocks and a conductive base, wherein the formed supporting blocks are arranged on the inner side of the working inner cavity, the upper end face of each supporting block is provided with the conductive base, and the formed conductive base and the lower wiring terminal are connected through a metal chain. Further, a placing groove is formed in the bottom wall of the inner side of the working inner cavity. Further, the side wall of the supporting block forms a connecting groove with an outward opening. Further, a plurality of groups of connecting holes are formed in the inner side inner wall of the connecting groove and close to the edge. Further, the connecting assembly comprises a fixing belt, two groups of connecting protrusions, and the connecting protrusions are formed and arranged on one side end face of the fixing belt. Further, a first fixing hole penetrating up and down is formed in the upper end face of the conductive base. Further, a second fixing hole penetrating through the upper side end face of the supporting block vertically is formed in the upper side end face of the supporting block, and the opening direction of the second fixing hole corresponds to that of the first fixing hole. Further, the tank body is made of transparent materials. Further, the supporting block and the connecting component are made of insulati