Automatic control system and method for vacuum arc-extinguishing chamber X-ray test

Abstract

The invention relates to the technical field of vacuum switches, and discloses an automatic control system and method for an X-ray test of a vacuum arc-extinguishing chamber, and the system comprises a fluorinated liquid adding and recycling unit, a data collection and control system, a test tool unit, a mechanical power unit, and a measurement unit. The test tool unit comprises a test groove, a vacuum arc-extinguishing chamber and an insulating support assembly. An observation window is formed in the side wall of the test tank; two ends of the insulation support assembly are connected with power ends. The liquid level sensor is arranged in the test tank; the measuring unit is located outside the test tank, and the measuring end of the measuring unit is aligned with the observation window of the test tank; the control end of the data acquisition and control system is respectively connected with the fluorinated liquid storage unit, the liquid level sensor, the mechanical power unit, the measuring unit and the power supply end. According to the invention, integration and intellectualization of an automatic control system are realized, automatic opening of the vacuum arc-extinguishing chamber, automatic measurement of the opening distance and automatic adding and recycling of the fluoride liquid are achieved, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum switches, and in particular to an automatic control system and method for vacuum interrupter X-ray testing. Background Art

[0002] At present, vacuum switches are widely used in the medium and low voltage fields. The 12kV voltage level vacuum switch has the highest usage, accounting for 99% of the total output of switches at this voltage level, and more than 90% of the 40.5kV voltage level switches are also vacuum switches. It can be seen that vacuum switches have a clear advantage in the 40.5kV and below levels. However, existing research results have shown that under certain conditions, vacuum interrupters will produce X-rays that are harmful to human health. IEC, GB and DL standards have included X-ray tests of vacuum interrupters as part of type tests in relevant standards.

[0003] With the development of vacuum technology and the restriction on the use of SF6 as a greenhouse gas, vacuum switches are also developing towards high voltage and large capacity. Vacuum interrupters, as the core components of vacuum switches, are also the focus of research. X-ray test of vacuum interrupters is one of the type test items of vacuum switches. It is very difficult to conduct X-ray test of vacuum interrupters with high voltage levels. Therefore, the present invention designs an automatic control system for X-ray test of vacuum interrupters. By this method, X-ray test of vacuum interrupters with rated voltage of 126kV and below can be carried out to meet the relevant requirements for X-ray test of vacuum interrupters in IEC, GB and DL standards.

[0004] At present, when conducting X-ray tests on vacuum interrupters, various high-voltage laboratories mainly use a simple X-ray test tooling for vacuum interrupters, which can conduct X-ray tests on vacuum interrupters with voltage levels of 40.5kV and below, uses oil as the insulating medium, requires manual adjustment of the opening distance, and has a low level of intelligence.

[0005] At present, each high voltage laboratory can generally only carry out X-ray tests on vacuum interrupters of 40.5kV and below, and there are fewer test fixtures for higher voltage levels. In the existing technology, insulating oil is mainly used as the insulating medium. In general, vacuum interrupters in test fixtures are arranged upright. When it is necessary to transfer the high voltage power supply from one end of the vacuum interrupter to the other end, the entire vacuum interrupter needs to be turned over. The high voltage vacuum interrupter is heavy, and when turning over, it not only wastes a lot of time, but is also more dangerous. In addition, in the existing technology, the opening of the vacuum interrupter, measuring the opening distance, adding liquid to the insulating medium and recycling are mostly manual operations, resulting in a low level of intelligence in the test system, which greatly affects the work efficiency. Summary of the invention

[0006] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide an automatic control system and method for vacuum interrupter X-ray testing, so as to solve the technical problem of how to achieve the integration and intelligence of vacuum interrupter testing tooling.

[0007] The present invention is achieved through the following technical solutions: In a first aspect, the present invention provides an automatic control system for vacuum interrupter X-ray testing, including a fluorinated liquid adding and recovery unit, a data acquisition and control system, a test fixture unit, a mechanical power unit, and a measurement unit; The test fixture unit includes a test trough, a vacuum interrupter, and an insulation support assembly; An observation window is provided on the side wall of the test tank; both ends of the insulating support assembly are connected to the power supply end respectively; the vacuum arc extinguishing chamber is fixedly arranged on the insulating support assembly and is located within the observation range of the observation window; the vacuum arc extinguishing chamber is provided with a static contact and a moving contact; The fluorinated liquid adding and recovery unit includes a fluorinated liquid storage unit and a liquid level sensor; the fluorinated liquid storage unit is located outside the test tank, and the output end of the fluorinated liquid storage unit is connected to the input port of the test tank, and the input end is connected to the output port of the test tank; the liquid level sensor is arranged in the test tank; The mechanical power unit is located outside the test slot, and the driving end of the mechanical power unit is connected to the moving contact through the test slot, and is used to drive the moving contact and the static contact to perform closing or opening movement; The measuring unit is located outside the test tank, and the measuring end of the measuring unit is aligned with the observation window of the test tank; The control end of the data acquisition and control system is respectively connected to the fluorinated liquid storage unit, the liquid level sensor, the mechanical power unit, the measuring unit and the power supply end.

[0008] Preferably, the insulating support assembly comprises a first insulating support and a second insulating support; The vacuum interrupter is located between the first insulating support and the second insulating support, wherein one end of the stationary contact is assembled on the first insulating support through one end of the vacuum interrupter, and the moving contact is arranged on the second insulating support through the other end of the vacuum interrupter, and is connected to the driving end of the mechanical power unit through the second insulating support; A slide rail is provided at one side of the first insulating support at the bottom of the test tank. The first insulating support is slidably connected to the slide rail to control the distance between the first insulating support and the second insulating support, and the vacuum arc extinguishing chamber is assembled between the first insulating support and the second insulating support.

[0009] Furthermore, the first insulating support includes a first insulating support and a first fixing support; the second insulating support includes a second insulating support and a second fixing support; The bottom ends of the first fixing bracket and the second fixing bracket are fixedly connected to the first insulating support and the second insulating support respectively by bolts; the top ends of the first fixing bracket and the second fixing bracket are provided with wiring holes, and the power supply end is connected through the wiring holes, wherein the wiring hole of the first fixing bracket is grounded or connected to the high-voltage power supply through the first copper wire, and the wiring hole of the second fixing bracket is connected to the high-voltage power supply or the grounding setting through the second copper wire.

[0010] Furthermore, the outer wall of the test tank is a lead plate, and a shaft seal is provided on one side of the test tank close to the second fixed bracket; the driving end of the mechanical power unit is connected to the moving contact through the shaft seal via the second fixed bracket.

[0011] Furthermore, the mechanical power unit includes a motor, a transmission device, a sensor, a mechanical property tester, and a transmission shaft; The driving end of the motor is connected to the transmission shaft through the transmission device; the transmission shaft is connected to the moving contact through the shaft seal and the second fixed bracket; The sensor is arranged on the transmission shaft, and the output end of the sensor is connected to the mechanical property tester; The motor and mechanical characteristic tester are connected to the data acquisition and control system respectively.

[0012] Preferably, the measuring unit includes a patrol instrument, a monitoring camera and a lifting and moving device; The patrol instrument is mounted on a lifting and moving device and is moved to the outside of the observation window of the test tank by the lifting and moving device to monitor the X-rays generated by the vacuum interrupter in the observation window; The monitoring camera is located outside the test tank and is used to record the overall test process in real time; The patrol instrument and monitoring camera are connected to the data acquisition and control system respectively.

[0013] Preferably, the fluorinated liquid storage unit comprises a liquid storage tank and a fluorinated liquid pump; The output end of the liquid storage tank is connected to the input port of the test tank via a fluorinated liquid pump, and a first solenoid valve is provided between the fluorinated liquid pump and the input port of the test tank; The input end of the liquid storage tank is connected to the output port of the test tank, and a second solenoid valve is provided between the input end of the liquid storage tank and the output port of the test tank; The fluorinated liquid pump, the first solenoid valve and the second solenoid valve are respectively connected to a data acquisition and control system.

[0014] Preferably, lifting rings are respectively provided at both ends of the top of the test trough, and the bottom of the test trough is mounted on an insulation moving device for displacement and movement of the test trough; the insulation moving device includes two groups of support insulators; the two groups of support insulators are respectively arranged on both sides of the bottom of the test trough, and universal wheels are respectively provided at the bottom ends of the two groups of support insulators, and a locking mechanism is provided on the universal wheels.

[0015] Preferably, a control module is provided in the data acquisition and control system, the input end of the control module is connected to the signal acquisition module, and the output end of the control module is connected to the signal drive module; the signal acquisition module is respectively connected to the liquid level sensor and the measuring unit; the signal drive module is respectively connected to the fluorinated liquid storage unit, the mechanical power unit and the power supply end.

[0016] In a second aspect, the present invention further provides an automatic control method for vacuum interrupter X-ray test, based on the above-mentioned automatic control system for vacuum interrupter X-ray test, comprising the following process: The data acquisition and control system drives the mechanical power unit so that the driving end of the mechanical power unit drives the moving contact to move through the test slot, so that the moving contact and the static contact are in a separated state in the vacuum interrupter; the mechanical power unit detects the opening distance between the moving contact and the static contact through the sensor, and transmits the data to the data acquisition and control system, and the data acquisition and control system limits the opening distance between the moving contact and the static contact. When the opening distance between the moving contact and the static contact reaches the minimum opening distance required by the test, the data acquisition and control system controls the motor to stop automatically; The data acquisition and control system drives the fluorinated liquid storage unit to input the fluorinated liquid into the test tank until the fluorinated liquid in the test tank reaches the set liquid level through the liquid level sensor, and then stops inputting. At this time, the vacuum interrupter is located in the fluorinated liquid. The data acquisition and control system turns on the power supply to energize both ends of the insulating bracket assembly, and drives the measuring unit to align with the observation window of the test tank to monitor the measurement value displayed by the patrol meter in real time. After the test is completed, the data acquisition and control system drives the fluorinated liquid storage unit to recycle the test tank, and the test is completed.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects: The invention provides an automatic control system for X-ray testing in a vacuum interrupter. An observation window is provided on the side wall of a test slot in a test fixture unit. Two ends of an insulating bracket assembly are respectively connected to power supply ends. The vacuum interrupter is fixedly arranged on the insulating bracket assembly and is located within the observation range of the observation window. The vacuum interrupter is provided with a static contact and a moving contact. Fluorinated liquid can be effectively input into the test slot through a fluorinated liquid adding and recovery unit. Fluorinated liquid is used as an insulating medium. Compared with insulating oil, fluorinated liquid has lower toxicity, is non-flammable, and has better thermal stability. The driving end of a mechanical power unit is connected to the moving contact through the test slot, which can effectively drive the moving contact. The contacts and the static contacts make closing or opening movements, the measuring unit is located outside the test tank, and the measuring end of the measuring unit is aimed at the observation window of the test tank, so that the X-ray information generated between the moving contact and the static contact can be collected in real time; the control end of the data acquisition and control system is respectively connected to the fluoride liquid storage unit, the liquid level sensor, the mechanical power unit, the measuring unit and the power supply end, so as to realize the integration and intelligence of the automatic control system, achieve the automatic opening of the vacuum arc chamber, the automatic measurement of the opening distance, the automatic filling and recovery of the fluoride liquid, reduce the test preparation time, improve the intelligence level of the test system, and thus improve the work efficiency.

[0018] Furthermore, the slide rail provided at the bottom of the test slot allows the first insulating bracket to be slidably connected, so that the spacing between the first insulating bracket and the second insulating bracket can be easily adjusted, so that the vacuum arc chamber can be easily assembled between the two brackets, and its position can be adjusted according to the test requirements, which increases the flexibility and adjustability of the test. The static contact is assembled on the first insulating bracket through one end of the vacuum arc chamber, and the moving contact is arranged on the second insulating bracket through the other end of the vacuum arc chamber, ensuring that the vacuum arc chamber is stably supported and fixed during the test, avoiding test errors caused by shaking or displacement. The moving contact is connected to the driving end of the mechanical power unit through the second insulating bracket, so that the mechanical power unit can efficiently drive the moving contact and the static contact to close or open the switch. This design simplifies the transmission structure, improves the driving efficiency, and ensures the accuracy and reliability of the test.

[0019] Furthermore, the first insulating support and the second insulating support serve as supporting structures to ensure the stability and reliability of the entire insulating support assembly. They are firmly connected to the first fixed support and the second fixed support by bolts, forming a stable mechanical structure that can withstand various stresses and loads during the test. The tops of the first fixed support and the second fixed support are provided with wiring holes, so that the power supply end can be easily connected to the insulating support assembly through the wiring holes. At the same time, the setting of the wiring holes also provides sufficient flexibility, and different wiring methods and configurations can be selected according to the test requirements. The wiring holes of the first fixed support or the second fixed support are grounded or connected to the high-voltage power supply through the first copper wire or the second copper wire, ensuring the electrical safety of the entire system. The grounding setting can effectively prevent electrical leakage and static electricity accumulation, protect the safety of equipment and personnel, connect the high-voltage power supply, and provide a stable high-voltage power input for the test of the vacuum arc chamber.

[0020] Furthermore, the outer wall of the test tank is a lead plate, and a shaft seal is provided on the side of the test tank close to the second fixed bracket; the driving end of the mechanical power unit is connected to the moving contact through the second fixed bracket through the shaft seal, and the lead plate as the outer wall material of the test tank can effectively block the leakage of radioactive radiation or X-rays. The setting of the shaft seal ensures that the connection between the driving end of the mechanical power unit and the moving contact is both tight and stable. It can prevent the leakage of the test medium and reduce the loose connection caused by vibration or displacement.

[0021] Furthermore, the motor, as a driving source, accurately transmits power to the transmission shaft through the transmission device, thereby driving the moving contact to close or open the switch; the sensor is set on the transmission shaft, which can monitor the mechanical characteristic parameters such as the speed and torque of the transmission shaft in real time. The output end of the sensor is connected to the mechanical characteristic tester, which can record and analyze these parameters in real time, providing a strong guarantee for the accuracy and reliability of the test data. The motor and the mechanical characteristic tester are respectively connected to the data acquisition and control system, realizing the automation and intelligence of the test process.

[0022] Preferably, the patrol instrument is mounted on a lifting and moving device, and can be flexibly moved to the outside of the observation window of the test tank to accurately monitor the X-rays generated by the vacuum arc chamber in the observation window. This ensures real-time monitoring of X-ray radiation during the test, which helps to promptly detect and handle abnormal situations. At the same time, the monitoring camera is located outside the test tank and can record the entire test process in real time, including the operating status of the test equipment, the operating process of the operator, etc., providing a strong guarantee for the integrity and traceability of the test data.

[0023] Preferably, the fluorinated liquid pump, the first solenoid valve and the second solenoid valve are respectively connected to a data acquisition and control system, so as to realize the automatic control and management of the fluorinated liquid circulation system. The control system can automatically adjust the working state of the fluorinated liquid pump and the opening and closing of the first solenoid valve and the second solenoid valve according to the test requirements, so as to accurately control the circulation and supply of the fluorinated liquid. Preferably, the lifting ring design at both ends of the top of the test trough provides convenience for carrying and installing the test trough, and the insulating moving device installed at the bottom, especially the support insulator with universal wheels, enables the test trough to be flexibly moved in the test room.

[0024] Preferably, the data acquisition and control system realizes automatic control of the entire test process through the integrated design of the control module, signal acquisition module and signal drive module. This highly integrated system architecture reduces the need for manual intervention and improves the efficiency and accuracy of the test.

[0025] The present invention also provides an automatic control method for X-ray testing of a vacuum arc chamber. The data acquisition and control system can accurately control the operation of the mechanical power unit, the fluorinated liquid storage unit and the power supply end, thereby realizing the automation of the test process. From the separation of the moving contact and the static contact, the input and recovery of the fluorinated liquid, to the energization of the insulating bracket assembly and the real-time monitoring of the measuring unit, the entire test process can be successfully completed under the precise control of the system. Automated control reduces the time and errors of manual operation and improves the efficiency and accuracy of the test. The system can monitor and record key data in the test process in real time, such as the liquid level of the fluorinated liquid, the measured value of the measuring unit, etc., providing a reliable basis for the analysis and evaluation of the test results. By placing the vacuum arc chamber in the fluorinated liquid, the system can optimize the test environment, reduce the radiation and scattering of X-rays, and improve the accuracy of the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of an automatic control system for vacuum interrupter X-ray testing in an embodiment of the present invention; Figure 2 Schematic diagram of the principle structure of a data acquisition and control system in an embodiment of the present invention; In the figure: 1. fluorinated liquid adding and recovery unit; 2. data acquisition and control system; 3. test fixture unit; 4. mechanical power unit; 5. measuring unit; 11. liquid storage tank; 12. fluorinated liquid pump; 13. first solenoid valve; 14. second solenoid valve; 15. liquid level sensor; 31. test tank; 32. vacuum arc extinguishing chamber; 33. static contact; 34. moving contact; 35. observation window; 36. high voltage power supply; 37. first insulating support; 38. second insulating support; 39. first fixed bracket; 310. second fixed bracket; 311. shaft seal; 312. slide rail; 313. lifting ring; 314. support insulator; 315. universal wheel; 316. first copper wire; 317 second copper wire; 41. motor; 42. transmission device; 43. sensor; 44. mechanical property tester; 45. transmission shaft; 51. patrol instrument; 52 monitoring camera; 53. lifting and moving device. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings: The object of the present invention is to provide an automatic control system and method for vacuum interrupter X-ray testing, so as to solve the technical problem of how to realize the integration and intelligence of vacuum interrupter testing tooling.

[0029] Example 1 See also Figure 1In one embodiment of the present invention, there is provided an automatic control system for vacuum interrupter X-ray test, comprising a fluorinated liquid adding and recovery unit 1, a data acquisition and control system 2, a test fixture unit 3, a mechanical power unit 4 and a measuring unit 5; the test fixture unit 3 comprises a test slot 31, a vacuum interrupter 32, and an insulating support assembly; an observation window 35 is provided on the side wall of the test slot 31; two ends of the insulating support assembly are respectively connected to the power supply end; the vacuum interrupter 32 is fixedly arranged on the insulating support assembly and is located within the observation range of the observation window 35; the vacuum interrupter 32 is provided with a static contact 33 and a moving contact 34; the fluorinated liquid adding and recovery unit 1 comprises a fluorinated liquid storage unit and a liquid level sensor 15; the fluorinated liquid The storage unit is located outside the test tank 31, and the output end of the fluorinated liquid storage unit is connected to the input port of the test tank 31, and the input end is connected to the output port of the test tank 31; the liquid level sensor 15 is arranged in the test tank 31; the mechanical power unit 4 is located outside the test tank 31, and the driving end of the mechanical power unit 4 is connected to the moving contact 34 through the test tank 31, which is used to drive the moving contact 34 and the static contact 33 to make a closing or opening movement; the measuring unit 5 is located outside the test tank 31, and the measuring end of the measuring unit 5 is aligned with the observation window 35 of the test tank 31; the control end of the data acquisition and control system 2 is respectively connected to the fluorinated liquid storage unit, the liquid level sensor 15, the mechanical power unit 4, the measuring unit 5 and the power supply end.

[0030] Specifically, the insulating support assembly includes a first insulating support and a second insulating support; the vacuum arc chamber 32 is located between the first insulating support and the second insulating support, wherein one end of the static contact 33 is assembled on the first insulating support through one end of the vacuum arc chamber 32, and the moving contact 34 is arranged on the second insulating support through the other end of the vacuum arc chamber 32, and is connected to the driving end of the mechanical power unit 4 through the second insulating support; a slide rail 312 is provided on one side of the first insulating support at the bottom of the test groove 31, and the first insulating support is slidably connected to the slide rail 312 for controlling the distance between the first insulating support and the second insulating support, and assembling the vacuum arc chamber 32 between the first insulating support and the second insulating support.

[0031] The first insulating support includes a first insulating support 37 and a first fixing support 39; the second insulating support includes a second insulating support 38 and a second fixing support 310; The bottom ends of the first fixing bracket 39 and the second fixing bracket 310 are fixedly connected to the first insulating support 37 and the second insulating support 38 by bolts respectively; the top ends of the first fixing bracket 39 and the second fixing bracket 310 are provided with wiring holes, and the power supply end is connected through the wiring holes, wherein the wiring hole of the first fixing bracket 39 is grounded or connected to the high-voltage power supply 36 through the first copper wire 316, and the wiring hole of the second fixing bracket 310 is connected to the high-voltage power supply 36 or grounded through the second copper wire 317.

[0032] Before the test in this embodiment begins, the two ends of the vacuum interrupter 32 are fixed to the first fixing bracket 39 and the second fixing bracket 310 respectively by bolt connection, and the first fixing bracket 39 and the second fixing bracket 310 are fixed to the first insulating support 37 and the second insulating support 38 respectively by bolt connection. The first insulating support 37 is provided with a slide rail at the bottom, and the distance between the insulating supports can be controlled by adjusting the slide rail at the bottom of the first insulating support 37 to install the vacuum interrupter. The first fixing bracket 39 and the second fixing bracket 310 are provided with mounting holes, and the position of the vacuum interrupter 32 can be adjusted up and down by bolt connection so that the contact of the vacuum interrupter is facing the observation window. The wiring holes on the first fixing bracket 39 and the second fixing bracket 310 are connected with bare copper wires and connected to the high voltage power supply 36 or the grounding terminal respectively.

[0033] In this embodiment, the high-voltage power supply 36 is mainly composed of a voltage regulator, an industrial frequency test transformer, a voltage divider, etc., which are used to generate the industrial frequency test voltage used in the test process. The high-voltage power supply is controlled by a data acquisition and control system, and the purpose of adjusting the test voltage is achieved by controlling the output voltage of the voltage regulator.

[0034] The outer wall of the test slot 31 is a lead plate, and a shaft seal 311 is provided on one side of the test slot 31 close to the second fixed bracket 310 ; the driving end of the mechanical power unit 4 is connected to the moving contact 34 through the shaft seal 311 via the second fixed bracket 310 .

[0035] Among them, the mechanical power unit 4 includes a motor 41, a transmission device 42, a sensor 43, a mechanical property tester 44 and a transmission shaft 45; the driving end of the motor 41 is connected to the transmission shaft 45 via the transmission device 42; the transmission shaft 45 is connected to the moving contact 34 through the shaft seal 311 and the second fixed bracket 310; the sensor 43 is arranged on the transmission shaft 45, and the output end of the sensor 43 is connected to the mechanical property tester 44; the motor 41 and the mechanical property tester 44 are respectively connected to the data acquisition and control system 2.

[0036] In this embodiment, the data acquisition and control system 2 controls the motor 41 to drive the transmission device 42, and the transmission device 42 pulls the transmission shaft 45 connected to the vacuum interrupter to open the vacuum interrupter 32. The mechanical property tester 44 tests the opening distance of the vacuum interrupter 32 through the sensor 43, and transmits the data to the data acquisition and control system 2. The data acquisition and control system 2 has a limit function. When the opening distance of the vacuum interrupter reaches the minimum opening distance required by the test, the control motor 41 automatically stops.

[0037] Specifically, the measuring unit 5 includes a patrol meter 51, a monitoring camera 52 and a lifting and moving device 53; the patrol meter 51 is mounted on the lifting and moving device 53, and is moved to the outside of the observation window 35 of the test tank 31 through the lifting and moving device 53, and is used to monitor the X-rays generated by the vacuum arc extinguishing chamber 32 in the observation window 35; the monitoring camera 52 is located outside the test tank 31, and is used to record the overall test process in real time; the patrol meter 51 and the monitoring camera 52 are respectively connected to the data acquisition and control system 2.

[0038] During the test in this embodiment, the patrol meter 51 needs to be placed on the lifting and moving device 53, and the height is adjusted so that the sensor element of the patrol meter 51 is located in the contact plane separated by the vacuum interrupter 32 and points to the contact. The patrol meter 51 should be 1m away from the outer surface of the vacuum interrupter 32. The data acquisition and control system 2 automatically collects the display data on the patrol meter and monitors the on-site test situation in real time through the monitoring camera 52.

[0039] Specifically, the fluorinated liquid storage unit includes a liquid storage tank 11 and a fluorinated liquid pump 12; the output end of the liquid storage tank 11 is connected to the input port of the test tank 31 through the fluorinated liquid pump 12, and a first solenoid valve 13 is provided between the fluorinated liquid pump 12 and the input port of the test tank 31; the input end of the liquid storage tank 11 is connected to the output port of the test tank 31, and a second solenoid valve 14 is provided between the input end of the liquid storage tank 11 and the output port of the test tank 31; the fluorinated liquid pump 12, the first solenoid valve 13 and the second solenoid valve 14 are respectively connected to the data acquisition and control system 2.

[0040] Before the test in this embodiment begins, the data acquisition and control system 2 controls the fluorinated liquid pump 12 to start and the first solenoid valve 13 to open, and the fluorinated liquid is injected into the test fixture unit 3 as an insulating medium. The data acquisition and control system 2 detects the liquid level in the test fixture unit 3 through the liquid level sensor 15, and automatically closes the fluorinated liquid pump 12 and the first solenoid valve 13 after the liquid level reaches the test requirements. After the test, the data acquisition and control system 2 opens the second solenoid valve 14, and the fluorinated liquid automatically flows back into the liquid storage tank 11. After the backflow is completed, the second solenoid valve 14 is closed.

[0041] Specifically, two ends of the top of the test slot 31 are provided with hanging rings 313 respectively, and the bottom of the test slot 31 is mounted on an insulating moving device for displacement and movement of the test slot 31; the insulating moving device includes two groups of support insulators 314; the two groups of support insulators 314 are respectively arranged on both sides of the bottom of the test slot 31, and the bottom ends of the two groups of support insulators 314 are respectively provided with universal wheels 315, and the universal wheels 315 are provided with a locking mechanism.

[0042] In this embodiment, the test tank 31 is surrounded by lead plates to prevent the X-rays radiated by the vacuum interrupter 32 from causing harm to the human body during the test. The observation window 35 on the front of the test tank 31 has a radiation suppression effect that is no greater than that provided by methyl methacrylate with a thickness of 9.5 mm. The hanging ring 313 on the upper part of the test tank 31 facilitates the movement of the test tank 31.

[0043] In this embodiment, the support insulator 314 is mainly used to ensure the safe insulation distance between the test slot and the ground during the test. The universal wheel 315 at the bottom of the support insulator 314 is used to move the position of the test slot 31. The locking device on the universal wheel 315 prevents the test slot from moving at will.

[0044] Specifically, according to Figure 2 As shown, a control module is provided in the data acquisition and control system 2, the input end of the control module is connected to the signal acquisition module, and the output end of the control module is connected to the signal driving module; the signal acquisition module is respectively connected to the liquid level sensor 15 and the measuring unit 5; the signal driving module is respectively connected to the fluorinated liquid storage unit, the mechanical power unit 4 and the power supply end.

[0045] Before the test in this embodiment begins, the fixed bracket and the insulating support are adjusted, and the vacuum interrupter 32 is installed on the insulating bracket so that the contact of the vacuum interrupter 32 is aligned with the observation window 35, and the lifting and moving device is adjusted so that the sensor element of the patrol meter 51 is located in the contact plane separated by the vacuum interrupter and points to the contact. The patrol meter 51 should be 1m away from the outer surface of the vacuum interrupter 32. After that, the bare copper wire connected to the fixed bracket is connected to the high-voltage power supply 36 and the grounding terminal respectively, and the data acquisition and control system 2 controls the fluorine liquid storage unit to inject fluorine liquid into the test tank 31, and controls the mechanical power unit 4 to separate the contacts of the vacuum interrupter to the minimum opening distance.

[0046] After the test begins, the output voltage of the high-voltage power supply 36 is adjusted to the specified voltage through the data acquisition and control system 2, and the measured value displayed by the patrol meter is monitored in real time. After the test is completed, the bare copper wire connected to the high-voltage power supply 36 and the ground terminal is replaced, and the test is carried out again. After all tests are completed, the fluorine liquid storage unit is controlled to discharge the fluorine liquid in the test tank 31.

[0047] In summary, the present invention provides an automatic control system for X-ray testing in a vacuum arc chamber, wherein an observation window is provided on the side wall of a test slot in a test fixture unit; both ends of an insulating bracket assembly are respectively connected to power supply ends; the vacuum arc chamber is fixedly arranged on the insulating bracket assembly and is located within the observation range of the observation window; the vacuum arc chamber is provided with a static contact and a moving contact; a fluorinated liquid can be effectively input into the test slot through a fluorinated liquid adding and recovery unit, and fluorinated liquid is used as an insulating medium. Compared with insulating oil, fluorinated liquid has lower toxicity, is non-flammable, and has better thermal stability; the driving end of the mechanical power unit is connected to the moving contact through the test slot, which can effectively The moving contact and the static contact are driven to make closing or opening movements. The measuring unit is located outside the test tank, and the measuring end of the measuring unit is aligned with the observation window of the test tank, so that the X-ray information generated between the moving contact and the static contact can be collected in real time. The control end of the data acquisition and control system is respectively connected to the fluoride liquid storage unit, the liquid level sensor, the mechanical power unit, the measuring unit and the power supply end, so as to realize the integration and intelligence of the automatic control system, achieve automatic opening of the vacuum arc chamber, automatic measurement of the opening distance, automatic filling and recovery of the fluoride liquid, reduce the test preparation time, improve the intelligence level of the test system, and thus improve the work efficiency.

[0048] Example 2 This embodiment provides an automatic control method for vacuum interrupter X-ray test, based on the above-mentioned automatic control system for vacuum interrupter X-ray test, including the following process: The data acquisition and control system 2 drives the mechanical power unit 4, so that the driving end of the mechanical power unit 4 drives the moving contact 34 to move through the test slot 31, so that the moving contact 34 and the static contact 35 are in a separated state in the vacuum interrupter 32; the mechanical power unit 4 detects the opening distance between the moving contact 34 and the static contact 35 through the sensor 43, and transmits the data to the data acquisition and control system 2, and the data acquisition and control system 2 limits the opening distance between the moving contact 34 and the static contact 35. When the opening distance between the moving contact 34 and the static contact 35 reaches the minimum opening distance required by the test, the data acquisition and control system 2 controls the motor 41 to stop automatically; The data acquisition and control system 2 drives the fluorinated liquid storage unit to input the fluorinated liquid into the test tank 31 until the fluorinated liquid in the test tank 31 reaches the set liquid level through the liquid level sensor 15, and then stops inputting. At this time, the vacuum interrupter 32 is located in the fluorinated liquid. The data acquisition and control system 2 turns on the power supply to energize both ends of the insulating bracket assembly, and drives the measuring unit 5 to align with the observation window 35 of the test tank 31 to monitor the measurement value displayed by the patrol meter in real time. After the test is completed, the data acquisition and control system 2 drives the fluorinated liquid storage unit to recycle the test tank 31, and the test is completed.

[0049] In summary, the present invention integrates and intelligentizes the vacuum interrupter X-ray test tooling, realizes the functions of adding and recovering fluorinated liquid, increasing and decreasing the voltage of high-voltage power supply, automatically opening the vacuum interrupter, automatically measuring the opening distance, and monitoring the test data in real time through data acquisition and automatic control system, and the whole test process is simple and convenient to operate, which greatly improves the level of integration and intelligence of the equipment system and improves the test efficiency, and the system fully meets the relevant requirements of the vacuum interrupter X-ray test.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An automatic control system for vacuum interrupter X-ray testing, characterized in that: It includes a fluorinated liquid adding and recovery unit (1), a data acquisition and control system (2), a test fixture unit (3), a mechanical power unit (4) and a measuring unit (5); The test fixture unit (3) comprises a test slot (31), a vacuum arc extinguishing chamber (32), and an insulating support assembly; An observation window (35) is provided on the side wall of the test slot (31); two ends of the insulating support assembly are respectively connected to power supply ends; the vacuum arc extinguishing chamber (32) is fixedly arranged on the insulating support assembly and is located within the observation range of the observation window (35); the vacuum arc extinguishing chamber (32) is provided with a stationary contact (33) and a moving contact (34); The fluorinated liquid adding and recovery unit (1) comprises a fluorinated liquid storage unit and a liquid level sensor (15); the fluorinated liquid storage unit is located outside the test tank (31), and the output end of the fluorinated liquid storage unit is connected to the input port of the test tank (31), and the input end is connected to the output port of the test tank (31); the liquid level sensor (15) is arranged in the test tank (31); The mechanical power unit (4) is located outside the test slot (31), and the driving end of the mechanical power unit (4) is connected to the moving contact (34) through the test slot (31) to drive the moving contact (34) and the static contact (33) to perform closing or opening movement; The measuring unit (5) is located outside the test tank (31), and the measuring end of the measuring unit (5) is aligned with the observation window (35) of the test tank (31); The control end of the data acquisition and control system (2) is respectively connected to the fluorinated liquid storage unit, the liquid level sensor (15), the mechanical power unit (4), the measuring unit (5) and the power supply end.

2. The automatic control system for vacuum interrupter X-ray testing according to claim 1, characterized in that: The insulating support assembly includes a first insulating support and a second insulating support; The vacuum interrupter (32) is located between a first insulating support and a second insulating support, wherein one end of the stationary contact (33) is assembled on the first insulating support via one end of the vacuum interrupter (32), and the moving contact (34) is arranged on the second insulating support via the other end of the vacuum interrupter (32), and is connected to the driving end of the mechanical power unit (4) via the second insulating support; A slide rail (312) is provided at the bottom of the test slot (31) on one side of the first insulating support, and the first insulating support is slidably connected to the slide rail (312) to control the distance between the first insulating support and the second insulating support, and the vacuum interrupter (32) is assembled between the first insulating support and the second insulating support.

3. The automatic control system for vacuum interrupter X-ray testing according to claim 2, characterized in that: The first insulating support comprises a first insulating support (37) and a first fixing support (39); the second insulating support comprises a second insulating support (38) and a second fixing support (310); The bottom ends of the first fixing bracket (39) and the second fixing bracket (310) are respectively fixedly connected to the first insulating support (37) and the second insulating support (38) by bolts; the top ends of the first fixing bracket (39) and the second fixing bracket (310) are provided with wiring holes, and the power supply end is connected through the wiring holes, wherein the wiring hole of the first fixing bracket (39) is grounded or connected to the high-voltage power supply (36) through the first copper wire (316), and the wiring hole of the second fixing bracket (310) is connected to the high-voltage power supply (36) or grounded through the second copper wire (317).

4. The automatic control system for vacuum interrupter X-ray testing according to claim 3, characterized in that: The outer wall of the test groove (31) is a lead plate, and a shaft seal (311) is provided on one side of the test groove (31) close to the second fixed bracket (310); the driving end of the mechanical power unit (4) is connected to the moving contact (34) via the shaft seal (311) and the second fixed bracket (310).

5. The automatic control system for vacuum interrupter X-ray testing according to claim 4, characterized in that: The mechanical power unit (4) comprises a motor (41), a transmission device (42), a sensor (43), a mechanical property tester (44) and a transmission shaft (45); The driving end of the motor (41) is connected to the transmission shaft (45) via the transmission device (42); the transmission shaft (45) is connected to the moving contact (34) via the shaft seal (311) and the second fixed bracket (310); The sensor (43) is arranged on the transmission shaft (45), and the output end of the sensor (43) is connected to the mechanical property tester (44); The motor (41) and the mechanical property tester (44) are respectively connected to the data acquisition and control system (2).

6. The automatic control system for vacuum interrupter X-ray testing according to claim 1, characterized in that: The measuring unit (5) comprises a patrol instrument (51), a monitoring camera (52) and a lifting and moving device (53); The patrol instrument (51) is mounted on the lifting and moving device (53) and is moved to the outside of the observation window (35) of the test tank (31) through the lifting and moving device (53) to monitor the X-rays generated by the vacuum interrupter (32) in the observation window (35); The monitoring camera (52) is located outside the test tank (31) and is used to record the entire test process in real time; The patrol instrument (51) and the monitoring camera (52) are respectively connected to the data acquisition and control system (2).

7. The automatic control system for vacuum interrupter X-ray testing according to claim 1, characterized in that: The fluorinated liquid storage unit comprises a liquid storage tank (11) and a fluorinated liquid pump (12); The output end of the liquid storage tank (11) is connected to the input port of the test tank (31) via the fluorinated liquid pump (12), and a first solenoid valve (13) is provided between the fluorinated liquid pump (12) and the input port of the test tank (31); The input end of the liquid storage tank (11) is connected to the output port of the test tank (31), and a second solenoid valve (14) is provided between the input end of the liquid storage tank (11) and the output port of the test tank (31); The fluorinated liquid pump (12), the first solenoid valve (13) and the second solenoid valve (14) are respectively connected to the data acquisition and control system (2).

8. The automatic control system for vacuum interrupter X-ray testing according to claim 1, characterized in that: Both ends of the top of the test trough (31) are provided with lifting rings (313), and the bottom of the test trough (31) is mounted on an insulation moving device for displacement and movement of the test trough (31); the insulation moving device comprises two groups of support insulators (314); the two groups of support insulators (314) are respectively arranged on both sides of the bottom of the test trough (31), and the bottom ends of the two groups of support insulators (314) are respectively provided with universal wheels (315), and the universal wheels (315) are provided with a locking mechanism.

9. The automatic control system for vacuum interrupter X-ray testing according to claim 1, characterized in that: The data acquisition and control system (2) is provided with a control module, the input end of the control module is connected to the signal acquisition module, and the output end of the control module is connected to the signal drive module; the signal acquisition module is respectively connected to the liquid level sensor (15) and the measuring unit (5); the signal drive module is respectively connected to the fluorinated liquid storage unit, the mechanical power unit (4) and the power supply end.

10. An automatic control method for vacuum interrupter X-ray testing, characterized in that: An automatic control system for an empty arc-extinguishing chamber X-ray test according to any one of claims 1 to 9 comprises the following process: The data acquisition and control system (2) drives the mechanical power unit (4) so ​​that the driving end of the mechanical power unit (4) drives the moving contact (34) to move through the test slot (31), so that the moving contact (34) and the stationary contact (35) are in a separated state in the vacuum interrupter (32). The mechanical power unit (4) detects the opening distance between the moving contact (34) and the stationary contact (35) through the sensor (43), and transmits the data to the data acquisition and control system (2). The data acquisition and control system (2) limits the opening distance between the moving contact (34) and the stationary contact (35). When the opening distance between the moving contact (34) and the stationary contact (35) reaches the minimum opening distance required by the test, the data acquisition and control system (2) controls the motor (41) to stop automatically. The data acquisition and control system (2) drives the fluorinated liquid storage unit to input the fluorinated liquid into the test tank (31) until the fluorinated liquid in the test tank (31) reaches a set liquid level as detected by the liquid level sensor (15), and then stops inputting, at which time the vacuum interrupter (32) is located in the fluorinated liquid; The data acquisition and control system (2) turns on the power supply end to energize the two ends of the insulating bracket assembly, and drives the measuring unit (5) to align with the observation window (35) of the test tank (31) to monitor the measured value displayed by the patrol meter in real time. After the test is completed, the data acquisition and control system (2) drives the fluorinated liquid storage unit to recycle the test tank (31), and the test is completed.

Images