A comprehensive device for testing switching performance

Abstract

The application relates to the technical field of switch performance test, in particular to a switch performance test comprehensive device which comprises a test box, a knife switch positioning frame is fixedly connected in the test box, a knife switch opening and closing mechanism is rotatably connected on the knife switch positioning frame, a water tank is fixedly connected to the bottom end inner wall of the test box, a water adding seat is fixedly connected to one side of the water tank, a steam seat is fixedly connected to the bottom end inner wall of the test box, a gas guide cover is fixedly connected to the rear inner wall of the test box, and an air extraction mechanism is rotatably connected to the inner wall of the gas guide cover. The accurate positioning and stable fixing of the knife switch are realized by arranging the knife switch positioning frame in the test box, the test precision and efficiency are improved, the adaptability, safety and operation convenience of the equipment are enhanced, the problems of inaccurate positioning and poor adaptability in the prior art are solved, and the quality and work efficiency of the knife switch performance test are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of switch performance testing technology, and in particular to a comprehensive switch performance testing device. Background Technology

[0002] Switch performance testing is the process of detecting and evaluating the various electrical and mechanical properties of electrical switching equipment (such as circuit breakers, contactors, and knife switches). The purpose is to ensure that the switching equipment can operate safely and reliably in practical applications, meeting design requirements. These tests are crucial for various electrical switching devices, especially in high-load, high-frequency operating environments. The tests include assessments of the switch's breaking capacity, mechanical durability, electrical durability, temperature rise, contact resistance, and other aspects to ensure stable performance under normal and extreme conditions.

[0003] With the rapid development of new energy technologies, especially the widespread adoption of new energy vehicles (NEVs), the application of switchgear in NEVs has become particularly important. Electrical switchgear for NEVs, such as high-voltage circuit breakers, contactors, charging pile switches, and DC-DC converter switches, needs to withstand electrical loads and operating environments different from those in traditional internal combustion engine vehicles. For example, the battery management system (BMS) in NEVs requires contactors and circuit breakers to protect the battery during charging and discharging, ensuring battery safety during these processes.

[0004] The prior art publication number CN119959812A provides a performance testing device for a switching power supply. By placing the switching power supply on a placement table and adjusting the clamping mechanism, the switching power supply can be quickly fixed and positioned. By rotating the testing mechanism, the position of the testing mechanism is adjusted so that the testing end of the side mechanism corresponds to the part of the switching power supply to be tested. The electric telescopic rod is activated to push the placement table, so that the testing mechanism can test the switching power supply, thereby improving the testing efficiency.

[0005] Existing technology uses two clamping plates to hold the switch during use. However, when positioning the knife switch, the irregular shape of the knife switch and the lack of a positioning structure and opening / closing structure adapted to the knife switch result in poor positioning accuracy and difficult operation during testing. This makes it impossible to effectively simulate the actual switch action in use, thus affecting the accuracy, stability, and efficiency of the test results.

[0006] In summary, the existing technology lacks a suitable positioning and opening / closing structure for knife switches. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of the prior art by proposing a comprehensive device for testing switch performance.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a comprehensive device for testing switch performance, comprising a test chamber, a knife switch positioning frame fixedly connected inside the test chamber, a knife switch opening and closing mechanism rotatably connected to the knife switch positioning frame, a water tank fixedly connected to the inner wall of the bottom end of the test chamber, a water filling seat fixedly connected to one side of the water tank, a steam seat fixedly connected to the inner wall of the bottom end of the test chamber, a gas guide hood fixedly connected to the inner wall of the rear side of the test chamber, and an air extraction mechanism rotatably connected to the inner wall of the gas guide hood.

[0009] Preferably, the knife switch positioning frame has a positioning groove, and a threaded rod is rotatably connected to one side of the knife switch positioning frame, with a limit plate rotatably connected to the top of the threaded rod.

[0010] Preferably, the switch opening and closing mechanism includes a rotating block, which is rotatably connected to the switch positioning frame. A gear is fixedly connected to one end of the rotating block, and a rack is meshed with one side of the gear. An electric actuator A is fixedly connected to the bottom end of the rack. The other end of the electric actuator A is fixedly connected to the switch positioning frame. An electric actuator B is fixedly connected to the other end of the rotating block, and a sector gear is fixedly connected to the output end of the electric actuator B.

[0011] Preferably, the rotating block is provided with an opening and closing frame that slides on it, and a tension spring A is fixedly connected between the opening and closing frame and the rotating block. A knife-edge groove is provided on one side of the top of the opening and closing frame.

[0012] Preferably, a lid is slidably fitted at the top opening of the water tank, and a spring A is fixedly connected to one end of the lid that is connected to the water tank, while the other end of the spring A is in contact with the water tank.

[0013] Preferably, a suction pipe is fixedly connected to one side of the water filling base, and the other end of the suction pipe is fixedly connected to the inner wall of the water tank. A drain pipe is opened through the bottom of the water filling base. A piston is slidably fitted through the inner wall of the water filling base. The top of the piston extends through the inner wall of the test chamber to the outside and is fixedly connected to a contact plate. A tension spring B is fixedly connected to the lower side of the contact plate. The other end of the tension spring B is fixedly connected to the inner wall of the test chamber. The upper side of the contact plate is in slidable contact with a sector gear.

[0014] Preferably, a metal dish is fixedly connected to the inner wall of the upper end of the steam seat, and multiple heating wires are fixedly connected to the inner wall of the bottom end of the steam seat in a ring structure.

[0015] Preferably, an exhaust pipe is fixedly connected to the top of the air guide hood, the top of the exhaust pipe is fixedly connected to the inner wall of the top of the test chamber, the top of the exhaust pipe is arranged in a ring structure, and multiple nozzles are fixedly connected to the lower side of the top of the exhaust pipe in a ring structure.

[0016] Preferably, the suction mechanism includes a universal joint, which is rotatably connected to the inner wall of the test chamber. One end of the universal joint, located inside the air guide hood, is fixedly connected to a fan blade. The other end of the universal joint extends through the inner wall of the test chamber to the outside and is fixedly connected to a gear plate. The gear plate has multiple transmission teeth rotatably connected in a ring structure. A spring B is fixedly connected between the transmission teeth and the inner wall of the gear plate. A slotted gear is rotatably connected to the outer wall of the gear plate. The slots on the inner wall of the slotted gear mesh with the transmission teeth, and the slotted gear meshes with a sector gear.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By setting up a knife switch positioning frame inside the test chamber, with positioning grooves on the knife switch that are adapted to the shape of the knife switch, and a limit plate connected by a threaded rod, the knife switch can be accurately positioned and stably fixed during performance testing. This not only improves the testing accuracy and efficiency, but also enhances the adaptability, safety and ease of operation of the equipment. It solves the problems of inaccurate positioning and poor adaptability in the existing technology, and greatly improves the quality and efficiency of knife switch performance testing.

[0019] By setting up a knife switch opening and closing mechanism and opening a knife slot on the opening and closing frame, it can be adapted to the knife handle of the knife switch. This enables precise control and simulation of the opening and closing action of the knife switch during performance testing, which not only improves the accuracy, efficiency and safety of the test, but also increases the stability and repeatability of the test process, and optimizes the overall effect of knife switch performance testing.

[0020] By setting up an air extraction mechanism, while the knife switch opening and closing mechanism is being tested, the air extraction mechanism can be driven to inject the high-temperature and high-humidity hot air generated by the steam seat into the test chamber through the air guide hood. This can simulate the electrical performance test of the knife switch under high temperature and high humidity conditions. This not only improves the comprehensiveness, accuracy and reliability of the electrical performance test of the knife switch, but also helps to optimize the equipment design and improve the equipment's adaptability to extreme environments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a comprehensive device for testing switch performance according to the present invention;

[0022] Figure 2This is a partial cross-sectional view of the overall structure of the integrated device for testing switch performance according to the present invention;

[0023] Figure 3 This is a schematic diagram of the knife switch positioning frame structure of the integrated device for testing switch performance according to the present invention;

[0024] Figure 4 This is a partial cross-sectional schematic diagram of the switch opening and closing mechanism of a comprehensive device for testing switch performance according to the present invention;

[0025] Figure 5 This is a partial cross-sectional view of the water tank and other structures of the integrated device for testing switch performance according to the present invention;

[0026] Figure 6 This is a partial cross-sectional schematic diagram of the water filling base structure of the integrated device for testing switch performance according to the present invention;

[0027] Figure 7 This is a cross-sectional schematic diagram of the steam seat structure of a comprehensive device for testing switch performance according to the present invention;

[0028] Figure 8 This is a partial cross-sectional schematic diagram of the air guide cover and other structures of the integrated device for testing switch performance according to the present invention;

[0029] Figure 9 This is a partial cross-sectional view of the air extraction mechanism of a comprehensive device for testing switch performance according to the present invention.

[0030] The diagram shows: 1. Test box; 2. Knife switch positioning frame; 3. Knife switch opening and closing mechanism; 4. Water tank; 5. Water inlet; 6. Steam seat; 7. Air guide hood; 8. Air extraction mechanism; 201. Positioning groove; 202. Threaded rod; 203. Limiting plate; 301. Rotating block; 302. Gear; 303. Rack; 304. Electric actuator A; 305. Electric actuator B; 306. Sector gear; 307. Opening and closing frame; 308. 309. Tension spring A; 401. Knife slot; 402. Box cover; 503. Spring A; 504. Inlet pipe; 505. Drain pipe; 506. Piston; 507. Contact plate; 508. Tension spring B; 609. Metal dish; 6002. Heating wire; 701. Exhaust pipe; 702. Nozzle; 801. Universal joint; 802. Fan blade; 803. Gear plate; 804. Transmission gear; 805. Spring B; 806. Slotted gear. Detailed Implementation

[0031] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0032] like Figures 1-9The device shown is a comprehensive device for testing the performance of switches, including a test chamber 1. A knife switch positioning frame 2 is fixedly connected inside the test chamber 1. A knife switch opening and closing mechanism 3 is rotatably connected to the knife switch positioning frame 2. A water tank 4 is fixedly connected to the inner wall at the bottom of the test chamber 1. A water filling seat 5 is fixedly connected to one side of the water tank 4. A steam seat 6 is fixedly connected to the inner wall at the bottom of the test chamber 1. An air guide hood 7 is fixedly connected to the inner wall at the rear of the test chamber 1. An air extraction mechanism 8 is rotatably connected to the inner wall of the air guide hood 7.

[0033] like Figure 3 As shown, the knife switch positioning frame 2 has a positioning groove 201. A threaded rod 202 is rotatably connected to one side of the knife switch positioning frame 2, and a limit plate 203 is rotatably connected to the top of the threaded rod 202. When the knife switch is placed into the positioning groove 201 on the knife switch positioning frame 2, and the threaded rod 202 is rotated, the threaded rod 202 causes the limit plate 203 to move downward.

[0034] By setting a knife switch positioning frame 2 inside the test chamber 1, and providing a positioning groove 201 that matches the shape of the knife switch, and a limiting plate 203 connected to the threaded rod 202, the knife switch can be accurately positioned and stably fixed during performance testing. This not only improves testing accuracy and efficiency, but also enhances the adaptability, safety, and ease of operation of the equipment. It solves the problems of inaccurate positioning and poor adaptability in the existing technology, and greatly improves the quality and efficiency of knife switch performance testing.

[0035] like Figure 4 As shown, the knife switch opening and closing mechanism 3 includes a rotating block 301, which is rotatably connected to the knife switch positioning frame 2. A gear 302 is fixedly connected to one end of the rotating block 301, and a rack 303 is meshed and driven on one side of the gear 302. An electric actuator A304 is fixedly connected to the bottom end of the rack 303, and the other end of the electric actuator A304 is fixedly connected to the knife switch positioning frame 2. An electric actuator B305 is fixedly connected to the other end of the rotating block 301, and a sector gear 306 is fixedly connected to the output end of the electric actuator B305. The center of the rotating block 301 is coaxial with the rotation center of the knife switch.

[0036] A sliding engagement frame 307 is mounted on the rotating block 301. A tension spring A308 is fixedly connected between the opening / closing frame 307 and the rotating block 301. A knife switch groove 309 is provided on one side of the top of the opening / closing frame 307. The tension spring A308 keeps the opening / closing frame 307 fitted onto the knife switch handle. Pulling the opening / closing frame 307 aligns the knife switch groove 309 with the handle on the knife switch. Under the action of the tension spring A308, the knife switch groove 309 is fitted onto the handle on the knife switch. Then, the electric actuator A304 drives the connected rack 303 to move, so that the rack 303 drives the rotating block 301 connected to the gear 302 to rotate. This causes the rotating block 301 to drive the opening / closing frame 307 to rotate, thereby opening and closing the knife switch.

[0037] like Figure 5 As shown, a cover 401 is slidably fitted at the top opening of the water tank 4. A spring A402 is fixedly connected to one end of the cover 401 that connects to the water tank 4, and the other end of the spring A402 is in contact with the water tank 4. The spring A402 keeps the cover 401 stably closed.

[0038] like Figure 6 As shown, a suction pipe 501 is fixedly connected to one side of the water filling base 5, and the other end of the suction pipe 501 is fixedly connected to the inner wall of the water tank 4. A drain pipe 502 is opened through the bottom of the water filling base 5. A piston 503 is slidably fitted through the inner wall of the water filling base 5. The top of the piston 503 extends through the inner wall of the test chamber 1 to the outside and is fixedly connected to a contact plate 504. A tension spring B505 is fixedly connected to the lower side of the contact plate 504, and the other end of the tension spring B505 is fixedly connected to the inner wall of the test chamber 1. The upper side of the contact plate 504 is in sliding contact with a sector gear 306. One-way valves are installed in both the suction pipe 501 and the drain pipe 502, enabling the water filling base 5 to intermittently add water while maintaining the rapid generation of steam in the steam seat 6. The drain pipe 502 is located above the metal dish 601. The electric actuator B305 drives the sector gear 306 to move closer to the slotted gear 806. Then, when the rotating block 301 drives the switch to open and close, it can drive the sector gear 306 to swing. When the sector gear 306 swings downward, it will contact and squeeze the contact plate 504. With the help of the tension spring B505, water in the water tank 4 can be drawn into the water filling base 5 through the inlet pipe 501, and injected into the metal dish 601 through the drain pipe 502.

[0039] like Figure 7 As shown, a metal dish 601 is fixedly connected to the inner wall of the upper end of the steam base 6, and multiple heating wires 602 are fixedly connected to the inner wall of the bottom end of the steam base 6 in a ring structure.

[0040] like Figure 8As shown, an exhaust pipe 701 is fixedly connected to the top of the air guide hood 7. The top of the exhaust pipe 701 is fixedly connected to the inner wall of the top of the test chamber 1. The top of the exhaust pipe 701 is arranged in a ring structure. Multiple nozzles 702 are fixedly connected to the lower side of the top of the exhaust pipe 701 in a ring structure.

[0041] like Figure 9 As shown, the suction mechanism 8 includes a universal joint 801, which is rotatably connected to the inner wall of the test chamber 1. One end of the universal joint 801, located inside the air guide shroud 7, is fixedly connected to a fan blade 802. The other end of the universal joint 801 extends through the inner wall of the test chamber 1 to the outside and is fixedly connected to a geared disc 803. Multiple transmission teeth 804 are rotatably connected to the geared disc 803 in a ring structure. A spring B805 is fixedly connected between the transmission teeth 804 and the inner wall of the geared disc 803. A slotted gear 806 is rotatably connected to the outer wall of the geared disc 803. The grooves on the inner wall of the slotted gear 806 mesh with the transmission teeth 804, and the slotted gear 806 meshes with the sector gear 306. The spring B805 enables unidirectional transmission of the transmission teeth 804. When the sector gear 306 swings upward, it can drive the slotted gear 806 to rotate. At this time, the internal dimensions of the slotted gear 806 will mesh with the transmission gear 804, thereby driving the universal joint 801 connected to the gear disk 803 to rotate, so that the universal joint 801 drives the fan blade 802 to rotate, and injects the high-temperature steam generated by the metal dish 601 into the test chamber 1 through the air guide hood 7 and the exhaust pipe 701.

[0042] Working principle: When testing the knife switch, first connect the knife switch to the circuit, then connect the contact resistance tester, insulation resistance tester, etc. to each contact point of the knife switch, then place the knife switch into the positioning groove 201 on the knife switch positioning frame 2, and rotate the threaded rod 202 so that the threaded rod 202 drives the limit plate 203 to move down and press on the upper side of the knife switch to limit and fix it.

[0043] Then, pull the opening and closing frame 307 to align the knife slot 309 on the opening and closing frame 307 with the handle on the knife switch. Under the action of the tension spring A308, the knife slot 309 is fitted onto the handle on the knife switch. Then, the electric push rod A304 drives the connected rack 303 to move, so that the rack 303 can drive the rotating block 301 connected to the gear 302 to rotate, so that the rotating block 301 drives the opening and closing frame 307 to rotate, thereby driving the knife switch to open and close. The electrical performance of the knife switch is tested using testing equipment such as a contact resistance tester and an insulation resistance tester.

[0044] When it is necessary to simulate the electrical performance of a knife switch under high temperature and high humidity conditions, the metal dish 601 is first heated by the heating wire 602. Then, the electric push rod B305 drives the sector gear 306 to move closer to the slotted gear 806. When the rotating block 301 drives the knife switch to open and close, it can drive the sector gear 306 to swing. When the sector gear 306 swings downward, it will contact and squeeze the contact plate 504. With the help of the tension spring B505, water in the water tank 4 can be drawn into the water filling base 5 through the injection pipe 501 and injected into the metal dish 601 through the drain pipe 502. At this time, the high temperature metal dish 601 will generate high temperature steam when it comes into contact with water.

[0045] Then, when the sector gear 306 swings upward, it can drive the slotted gear 806 to rotate. At this time, the internal dimensions of the slotted gear 806 will mesh with the transmission gear 804, thereby driving the universal joint 801 connected to the gear disk 803 to rotate, so that the universal joint 801 drives the fan blade 802 to rotate, and injects the high-temperature steam generated by the metal dish 601 into the test chamber 1 through the air guide 7 and the exhaust pipe 701, so as to test the electrical performance of the knife switch when it is opened and closed under high temperature and high humidity environment.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A comprehensive device for testing switch performance, comprising a test chamber, characterized in that: A knife switch positioning frame is fixedly connected inside the test chamber. A knife switch opening and closing mechanism is rotatably connected to the knife switch positioning frame. A water tank is fixedly connected to the inner wall of the bottom of the test chamber. A water inlet is fixedly connected to one side of the water tank. A steam holder is fixedly connected to the inner wall of the bottom of the test chamber. A vent is fixedly connected to the inner wall of the rear side of the test chamber. A suction mechanism is rotatably connected to the inner wall of the vent. The knife switch opening and closing mechanism includes a rotating block, which is rotatably connected to the knife switch positioning frame. A gear is fixedly connected to one end of the rotating block, and a rack is meshed with the gear on one side. An electric actuator A is fixedly connected to the bottom end of the rack. The other end of the electric actuator A is fixedly connected to the positioning frame of the knife switch. An electric actuator B is fixedly connected to the other end of the rotating block, and a sector gear is fixedly connected to the output end of the electric actuator B. A tank cover is slidably fitted at the top opening of the water tank. A spring A is fixedly connected to one end of the tank cover that connects to the water tank, and the other end of the spring A is in movable contact with the water tank. A suction pipe is fixedly connected to one side of the water filling base, and the other end of the suction pipe is fixedly connected to the inner wall of the water tank. A drain pipe is opened through the bottom of the water filling base. A piston is slidably fitted through the inner wall of the water filling base. The top of the piston extends through the inner wall of the test chamber to the outside and is fixedly connected to a contact plate. A tension spring B is fixedly connected to the lower side of the contact plate. The other end of the tension spring B is fixedly connected to the inner wall of the test chamber. The upper side of the contact plate is in slidable contact with a sector gear. The air extraction mechanism includes a universal joint. The universal joint is rotatably connected to the inner wall of the test chamber. One end of the universal joint, located inside the air guide shroud, is fixedly connected to a fan blade. The other end of the universal joint extends through the inner wall of the test chamber to the outside and is fixedly connected to a gear plate. The gear plate has multiple transmission teeth rotatably connected in a ring structure. A spring B is fixedly connected between the transmission teeth and the inner wall of the gear plate. A slotted gear is rotatably connected to the outer wall of the gear plate. The slots on the inner wall of the slotted gear mesh with the transmission teeth, and the slotted gear meshes with the fan gear.

2. The integrated device for testing switch performance according to claim 1, characterized in that: The knife switch positioning frame is provided with a positioning groove, and a threaded rod is rotatably connected to one side of the knife switch positioning frame. A limit plate is rotatably connected to the top of the threaded rod.

3. The integrated device for testing switch performance according to claim 1, characterized in that: An opening and closing frame is slidably fitted on the rotating block, and a tension spring A is fixedly connected between the opening and closing frame and the rotating block. A knife-edge groove is provided on one side of the top of the opening and closing frame.

4. The integrated device for testing switch performance according to claim 1, characterized in that: A metal dish is fixedly connected to the inner wall of the upper end of the steam seat, and multiple heating wires are fixedly connected to the inner wall of the bottom end of the steam seat in a ring structure.

5. The integrated device for testing switch performance according to claim 1, characterized in that: An exhaust pipe is fixedly connected to the top of the air guide hood. The top of the exhaust pipe is fixedly connected to the inner wall of the top of the test chamber. The top of the exhaust pipe has a ring structure. Multiple nozzles are fixedly connected to the lower side of the top of the exhaust pipe in a ring structure.

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