Matching optimization device for mechanical characteristic test of vacuum contactor type circuit breaker

Abstract

The invention discloses a matching optimization device for a mechanical characteristic test of a vacuum contactor type circuit breaker, which relates to the technical field of vacuum contactor type circuit breakers and comprises a mechanical characteristic tester, a mechanical characteristic test matching optimization instrument, the vacuum contactor type circuit breaker and a secondary socket, the mechanical characteristic tester is electrically connected with the vacuum contactor circuit breaker through the mechanical characteristic test matching optimization instrument and the secondary socket, and the mechanical characteristic test matching optimization instrument tests the vacuum contactor circuit breaker by switching an opening and closing loop between the mechanical characteristic tester and the vacuum contactor circuit breaker; the mechanical characteristic tester can be prevented from being directly connected with the vacuum contactor circuit breaker, the problems of long time consumption, wiring errors and short circuit of the tester during manual wire clamp replacement in the mechanical characteristic test process are solved, the working efficiency of testers is greatly improved, the failure rate of the tester is reduced, and the detection operation of the vacuum contactor circuit breaker is convenient and rapid.

Description

Technical Field

[0001] This invention relates to the field of vacuum contactor circuit breaker technology, and specifically to a matching optimization device for testing the mechanical characteristics of vacuum contactor circuit breakers. Background Technology

[0002] Vacuum contactor circuit breakers are a crucial power source for the boiler load of thermal power units. Failures can impact the grid load. However, prolonged operation can lead to aging of the opening and closing mechanisms, increasing the resistance of the opening and closing relay contacts and causing the circuit breaker to fail to open or close. Therefore, the opening and closing mechanisms of the circuit breakers need to be replaced periodically. To verify the mechanical performance and operational reliability of the circuit breaker after replacement, mechanical characteristic tests must be conducted according to the pre-test procedures. The project team encountered many problems during traditional mechanical characteristic tests. For example, each circuit breaker's control circuit secondary socket has 32 male pins with small spacing between them. During the test, the instrument output test clamps are prone to loosening and short-circuiting between positive and negative poles. The pin numbers are unclear, and the wire ends are easily tangled, requiring manual untangling and repeated clamp replacement. Furthermore, manual clamp replacement can easily lead to wiring errors, resulting in unqualified test results. During unit maintenance, more than thirty circuit breakers need to undergo mechanical characteristic tests sequentially, complicating maintenance efficiency.

[0003] In traditional mechanical characteristic testing, the instrument output test clamps are prone to loosening and short circuits between positive and negative terminals. The pin numbers are unclear, and the wire ends are easily tangled. This requires manual untangling and repeated clamp replacement. Furthermore, manual clamp replacement can easily lead to wiring errors, resulting in unqualified test results, reduced efficiency of mechanical characteristic testing, and damage to precision testing instruments. Summary of the Invention

[0004] To overcome the aforementioned technical problems, the present invention aims to provide an optimized device for testing the mechanical characteristics of vacuum contactor circuit breakers. This device addresses the issues in the prior art where, during mechanical characteristic testing, the instrument output test clamps are prone to loosening and short-circuiting between positive and negative poles, the pin numbers are unclear, and the wire ends are easily tangled. This necessitates manual untangling and repeated clamp replacement, and manual clamp replacement can easily lead to wiring errors, resulting in unqualified test results, reduced efficiency of mechanical characteristic testing, and damage to precision testing instruments.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] Specifically, a mechanical characteristic testing and optimization device for a vacuum contactor circuit breaker is provided, comprising a mechanical characteristic tester, a mechanical characteristic test optimization device, a vacuum contactor circuit breaker, and a secondary socket. The mechanical characteristic tester is electrically connected to the vacuum contactor circuit breaker through the mechanical characteristic test optimization device and the secondary socket. The mechanical characteristic test optimization device tests the vacuum contactor circuit breaker by switching the opening and closing circuits between the mechanical characteristic tester and the vacuum contactor circuit breaker.

[0007] As a further aspect of the present invention: the mechanical characteristic testing instrument includes a testing instrument body, and the top surface of the testing instrument body is provided with an operation screen, a control panel, a DC output terminal and a signal feedback terminal.

[0008] As a further aspect of the present invention: the mechanical property test matching optimization instrument includes an optimization instrument body, and the top surface of the optimization instrument body is provided with a positive terminal, a negative terminal, a changeover switch and a female pin terminal.

[0009] As a further aspect of the present invention: the DC output terminal is electrically connected to the positive terminal and the negative terminal via wires.

[0010] As a further aspect of the present invention: the vacuum contactor circuit breaker is provided with a circuit breaker docking module, an indicator terminal, and a three-phase switching mechanism.

[0011] As a further aspect of the present invention: the secondary socket is provided with a male pin terminal and a socket mating module.

[0012] As a further aspect of the present invention: the circuit breaker docking module and the socket docking module are mutually fitted and electrically connected.

[0013] As a further aspect of the present invention: the signal feedback terminal is electrically connected to the indicator terminal and the three-phase switching via a wire.

[0014] As a further aspect of the present invention: the female pin terminal and the male pin terminal are mutually fitted and electrically connected.

[0015] As a further embodiment of the present invention: the female needle terminal includes needle numbers 9, 10, 19, 20, 31, and 32, and the male needle terminal includes needle numbers 9, 10, 19, 20, 31, and 32.

[0016] The beneficial effects of this invention are:

[0017] In this invention, the detection parameters are collected by a mechanical characteristic tester through a mechanical characteristic test optimization instrument and a secondary socket on the vacuum contactor circuit breaker. The collected detection parameters are then converted into electrical signals and transmitted to the signal feedback terminal. The signal feedback terminal then transmits the electrical signals to the operation screen, which finally displays the detection results of the vacuum contactor circuit breaker. By using the set mechanical characteristic test optimization instrument and secondary socket to test the vacuum contactor circuit breaker, the direct connection between the mechanical characteristic tester and the vacuum contactor circuit breaker can be avoided. This solves the problems of time-consuming manual replacement of wire clamps, wiring errors, and instrument short circuits during mechanical characteristic testing, greatly improving the work efficiency of testers and reducing the instrument failure rate, making the testing operation of the vacuum contactor circuit breaker convenient and quick. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 ;

[0022] Figure 4 This is a wiring diagram of the present invention;

[0023] Figure 5 This is a schematic diagram of the vacuum contactor circuit breaker in this invention;

[0024] Figure 6 This is a schematic diagram of the secondary socket in this invention.

[0025] Explanation of reference numerals in the attached drawings: 1. Mechanical characteristic tester; 11. Tester body; 12. Tester protective cover; 13. Operation panel; 14. Control panel; 15. DC output terminal; 16. Signal feedback terminal; 2. Mechanical characteristic tester supporting optimizer; 21. Optimizer body; 22. Optimizer protective cover; 23. Positive terminal; 24. Negative terminal; 25. Changeover switch; 26. Female pin terminal; 3. Vacuum contactor circuit breaker; 31. Circuit breaker docking module; 32. Indicator terminal; 33. Three-phase switching device; 4. Secondary socket; 41. Male pin terminal; 42. Socket docking module. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1

[0028] like Figures 1-6 As shown, this invention discloses a mechanical characteristic testing and optimization device for a vacuum contactor circuit breaker, comprising a mechanical characteristic tester 1, a mechanical characteristic test optimization device 2, a vacuum contactor circuit breaker 3, and a secondary socket 4. The mechanical characteristic tester 1 is electrically connected to the vacuum contactor circuit breaker 3 through the mechanical characteristic test optimization device 2 and the secondary socket 4. The mechanical characteristic test optimization device 2 tests the vacuum contactor circuit breaker 3 by switching the opening and closing circuits between the mechanical characteristic tester 1 and the vacuum contactor circuit breaker 3.

[0029] It should be noted that the mechanical characteristic tester 1 includes a tester body 11. The top surface of the tester body 11 is provided with an operation screen 13, a control panel 14, a DC output terminal 15, and a signal feedback terminal 16. A tester protective cover 12 is rotatably connected to one end of the tester body 11. When the tester body 11 and the tester protective cover 12 are closed, the tester body 11 and the tester protective cover 12 can protect the operation screen 13, control panel 14, DC output terminal 15, and signal feedback terminal 16, thereby improving the protection effect of the operation screen 13, control panel 14, DC output terminal 15, and signal feedback terminal 16. The DC output terminal 15 is directly connected to the mechanical characteristic tester 2 via a wire, and the signal feedback terminal 16 is directly connected to the vacuum contactor circuit breaker 3 via a wire.

[0030] When the mechanical characteristic tester 1 tests the vacuum contactor circuit breaker 3 through the mechanical characteristic test optimization instrument 2 and secondary socket 4, the vacuum contactor circuit breaker 3 can convert the test results into an electrical signal and send it to the signal feedback terminal 16. The signal feedback terminal 16 then transmits this electrical signal to the operation panel 13, allowing the operation panel 13 to intuitively display the test results of the vacuum contactor circuit breaker 3 for easy identification by the operator. Furthermore, the operator can adjust the test parameters of the mechanical characteristic tester 1 through the control panel 14. These test parameters include the main circuit resistance of the vacuum contactor circuit breaker 3, the synchronicity of opening and closing, the contact bounce time, and the opening and closing coil current. The main circuit resistance refers to the circuit resistance when the contacts of the vacuum contactor circuit breaker 3 are closed. Increased circuit resistance can lead to overheating of the contacts, thereby accelerating oxidation or welding. Therefore, it is necessary to test the main circuit resistance of the vacuum contactor circuit breaker 3 through the mechanical characteristic tester 1 to prevent overheating of the contacts. Rapid oxidation or welding; the synchronicity of opening and closing refers to the maximum difference in the opening or closing time of the three-phase contacts. Asynchrony of the three phases will lead to an unbalanced load current, which may cause overvoltage or system oscillation. Therefore, it is necessary to test the synchronicity of opening and closing of the vacuum contactor circuit breaker 3 through the mechanical characteristic tester 1 to prevent the vacuum contactor circuit breaker 3 from causing overvoltage or system oscillation. Contact bounce time refers to the time and displacement of the contact rebound after the contact collision during the closing process of the three-phase contacts. Excessive bounce after the contact collision will generate multiple arcs, leading to contact welding or a reduction in the life of the arc extinguishing chamber. Therefore, it is necessary to test the contact bounce time of the vacuum contactor circuit breaker 3 through the mechanical characteristic tester 1 to prevent contact welding or a reduction in the life of the arc extinguishing chamber. Opening and closing coil current refers to the current waveform of the coil when the three-phase contacts open / close. Abnormal current waveform can reflect mechanism jamming, power supply failure or electromagnet aging. Therefore, it is necessary to test the opening and closing coil current of the vacuum contactor circuit breaker 3 through the mechanical characteristic tester 1.

[0031] The aforementioned test parameters are collected by the mechanical characteristic tester 1 through the mechanical characteristic test optimization instrument 2 and the secondary socket 4 on the vacuum contactor circuit breaker 3. The collected test parameters are then converted into electrical signals and transmitted to the signal feedback terminal 16. The signal feedback terminal 16 then transmits the electrical signals to the operation screen 13, and finally the operation screen 13 displays the test results of the vacuum contactor circuit breaker 3. By using the mechanical characteristic test optimization instrument 2 and the secondary socket 4 to test the vacuum contactor circuit breaker 3, the direct connection between the mechanical characteristic tester 1 and the vacuum contactor circuit breaker 3 can be avoided. This solves the problems of time-consuming manual replacement of wire clamps, wiring errors, and instrument short circuits during mechanical characteristic testing, greatly improving the work efficiency of the test personnel and reducing the instrument failure rate, making the testing operation of the vacuum contactor circuit breaker 3 convenient and quick.

[0032] Example 2

[0033] like Figures 1-6As shown, the mechanical characteristic testing and optimization instrument 2 includes an optimization instrument body 21. The top surface of the optimization instrument body 21 is provided with a positive terminal 23, a negative terminal 24, a changeover switch 25, and a female pin terminal 26. An optimization instrument protective cover 22 is rotatably connected to one end of the optimization instrument body 21. The protective cover 22 and the optimization instrument body 21 fit together. When the protective cover 22 and the optimization instrument body 21 are closed, the protective cover 22 and the optimization instrument body 21 can protect the inner positive terminal 23, negative terminal 24, changeover switch 25, and female pin terminal 26, improving the protection of the positive terminal 23, negative terminal 24, changeover switch 25, and female pin terminal 26. Regarding the protection effect of the female pin terminal 26, it should be noted that the positive terminal 23 and negative terminal 24 on the optimizer body 21 are connected to the DC output terminal 15 on the test instrument body 11 through wires. In this way, the test instrument body 11 can transmit electrical signals to the positive terminal 23 and negative terminal 24 in the optimizer body 21 through the DC output terminal 15. Thus, the connection between the mechanical characteristic tester 1 and the mechanical characteristic test matching optimizer 2 is realized. The set changeover switch 25 is used to switch the open / closed state. Therefore, the opening and closing test operation is realized by changing the position of the changeover switch 25. The wiring and operation are reliable and convenient.

[0034] like Figures 4-6 As shown, the vacuum contactor circuit breaker 3 is equipped with a circuit breaker docking module 31, an indicator terminal 32, and a three-phase switching device 33. It should be noted that the vacuum contactor circuit breaker 3 is a switching device used for power system control and protection. It is mainly used for safely connecting and disconnecting circuits, and for quickly cutting off the circuit in case of short circuits or overloads, preventing damage to equipment and power grid accidents. The vacuum contactor circuit breaker 3 uses a vacuum interrupter chamber, utilizing a high vacuum environment to quickly extinguish the arc, ensuring reliable disconnection. When the vacuum contactor circuit breaker 3 is used on the boiler load of a thermal power unit, the vacuum interrupter breaker 3 utilizes a high vacuum environment to quickly extinguish the arc. The vacuum interrupter chamber is oil-free. It is SF6 gas-free, maintenance-free, suitable for frequent operation, and can act quickly in case of short circuit or overload to protect the load of thermal power unit boiler. When the motors in the load of thermal power unit boiler are frequently started and stopped, the vacuum contactor circuit breaker 3 is used as the main switch or branch protection in the low-voltage / medium-voltage distribution cabinet. It should also be noted that the vacuum interrupter uses a high vacuum environment to achieve efficient arc extinguishing. There is almost no arc generated when the moving and stationary contacts are disconnected. The three-phase switch 33 adopts electromagnetic, spring energy storage or permanent magnet drive to ensure fast and reliable opening and closing action. The insulating support on the three-phase switch 33 provides electrical isolation and mechanical fixation to ensure that the three-phase switch 33 can stably perform opening / closing operation.

[0035] The circuit breaker docking module 31 is used to dock with the secondary socket 4, so that the secondary socket 4 and the vacuum contactor circuit breaker 3 are electrically connected. Therefore, the mechanical characteristic tester 1 and the mechanical characteristic test matching optimization instrument 2 can be electrically connected to the vacuum contactor circuit breaker 3 through the secondary socket 4, and can test the vacuum contactor circuit breaker 3.

[0036] like Figures 4-6 As shown, the secondary socket 4 is provided with a male pin terminal 41 and a socket docking module 42. It should be noted that the secondary socket 4 is electrically connected to the vacuum contactor circuit breaker 3 through the socket docking module 42, specifically through the socket docking module 42 and the circuit breaker docking module 31 on the vacuum contactor circuit breaker 3. In this way, the secondary socket 4 can be electrically connected to the vacuum contactor circuit breaker 3.

[0037] like Figures 4-6 As shown, the circuit breaker docking module 31 and the socket docking module 42 fit together and are electrically connected. It should be noted that the circuit breaker docking module 31 and the socket docking module 42 use guide grooves, snaps, or bolts to ensure precise alignment and physical locking of the circuit breaker docking module 31 and the socket docking module 42, preventing loosening due to vibration. The conductive terminals inside the circuit breaker docking module 31 and the socket docking module 42 are silver-plated to reduce contact resistance and support high current transmission. The circuit breaker docking module 31 and the socket docking module 42 integrate several conductive terminals and conductive grooves. When the circuit breaker docking module 31 and the socket docking module 42 are engaged, the conductive terminals integrated on the circuit breaker docking module 31 can be embedded into the conductive grooves on the socket docking module 42.

[0038] like Figures 4-6 As shown, the signal feedback terminal 16 is electrically connected to the indicator terminal 32 and the three-phase switching 33 via wires. It should be noted that the test instrument body 11 is connected to the indicator terminal 32 and the three-phase switching 33 on the vacuum contactor circuit breaker 3 via the signal feedback terminal 16. In this way, when the three-phase switching breaker 33 is opened / closed, the opening / closing status of the three-phase switching breaker 33 can be converted into an electrical signal through the indicator terminal 32 and sent to the signal feedback terminal 16. The signal feedback terminal 16 then sends the electrical signal to the operation panel 13, so that the operation panel 13 displays the test results of the vacuum contactor circuit breaker 3. By using the mechanical characteristic test matching optimizer 2 and the secondary socket 4 to test the vacuum contactor circuit breaker 3, the direct connection between the mechanical characteristic tester 1 and the vacuum contactor circuit breaker 3 can be avoided. This solves the problems of time-consuming manual replacement of wire clamps, wiring errors, and instrument short circuits during the mechanical characteristic test, greatly improving the work efficiency of the test personnel and reducing the instrument failure rate, making the testing operation of the vacuum contactor circuit breaker 3 convenient and quick.

[0039] like Figures 4-6As shown, the female pin terminal 26 and the male pin terminal 41 are mated and electrically connected. The female pin terminal 26 includes pin numbers 9, 10, 19, 20, 31, and 32, and the male pin terminal 41 includes pin numbers 9, 10, 19, 20, 31, and 32. Therefore, the pin numbers on the female pin terminal 26 and the male pin terminal 41 correspond one-to-one and are mated. It should be noted that the wires connecting the mechanical characteristic tester 1, the mechanical characteristic test matching optimizer 2, the vacuum contactor circuit breaker 3, and the secondary socket are 2.5mm square wires. The function of the changeover switch 25 on the optimizer body 21 is to effectively switch the opening circuit (9-10, 19-20) and the closing circuit (9-31, 19-32), ensuring the correctness of the test data while effectively solving the problems of manual replacement of the opening and closing circuit test clamps, easy clamp detachment, wiring errors, and instrument short circuits.

[0040] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A testing and optimization device for the mechanical characteristics of a vacuum contactor-type circuit breaker, characterized in that, The device includes a mechanical characteristic tester (1), a mechanical characteristic test matching optimization device (2), a vacuum contactor circuit breaker (3), and a secondary socket (4). The mechanical characteristic tester (1) is electrically connected to the vacuum contactor circuit breaker (3) through the mechanical characteristic test matching optimization device (2) and the secondary socket (4). The mechanical characteristic test matching optimization device (2) tests the vacuum contactor circuit breaker (3) by switching the opening and closing circuit between the mechanical characteristic tester (1) and the vacuum contactor circuit breaker (3).

2. The optimized device for testing the mechanical characteristics of a vacuum contactor-type circuit breaker according to claim 1, characterized in that, The mechanical property testing instrument (1) includes a testing instrument body (11), and the top surface of the testing instrument body (11) is provided with an operation screen (13), a control panel (14), a DC output terminal (15), and a signal feedback terminal (16).

3. The optimized device for testing the mechanical characteristics of a vacuum contactor-type circuit breaker according to claim 2, characterized in that, The mechanical property test matching optimizer (2) includes an optimizer body (21), and the top surface of the optimizer body (21) is provided with a positive terminal (23), a negative terminal (24), a changeover switch (25) and a female pin terminal (26).

4. The optimized device for testing the mechanical characteristics of a vacuum contactor-type circuit breaker according to claim 3, characterized in that, The DC output terminal (15) is electrically connected to the positive terminal (23) and the negative terminal (24) via wires.

5. The optimized device for testing the mechanical characteristics of a vacuum contactor-type circuit breaker according to claim 2, characterized in that, The vacuum contactor circuit breaker (3) is equipped with a circuit breaker docking module (31), an indicator terminal (32), and a three-phase switching (33).

6. The optimized device for testing the mechanical characteristics of a vacuum contactor-type circuit breaker according to claim 5, characterized in that, The secondary socket (4) is provided with a male pin terminal (41) and a socket docking module (42).

7. The optimized device for testing the mechanical characteristics of a vacuum contactor-type circuit breaker according to claim 6, characterized in that, The circuit breaker docking module (31) and the socket docking module (42) are fitted together and electrically connected.

8. The optimized device for testing the mechanical characteristics of a vacuum contactor-type circuit breaker according to claim 5, characterized in that, The signal feedback terminal (16) is electrically connected to the indicator terminal (32) and the three-phase switching (33) via a wire.

9. The optimized device for testing the mechanical characteristics of a vacuum contactor-type circuit breaker according to claim 3, characterized in that, The female pin terminal (26) and the male pin terminal (41) are fitted together and electrically connected.

10. The optimized device for testing the mechanical characteristics of a vacuum contactor-type circuit breaker according to claim 1, characterized in that, The female needle terminal (26) includes needle numbers 9, 10, 19, 20, 31, and 32, and the male needle terminal (41) includes needle numbers 9, 10, 19, 20, 31, and 32.

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