Power switch testing device of high-voltage power distribution cabinet

Abstract

The invention relates to the technical field of power switch detection, in particular to a power switch testing device of a high-voltage power distribution cabinet, which is used for detecting the mechanical performance of a circuit breaker handle and comprises a bearing mechanism and a clamping mechanism, and the clamping mechanism is composed of two clamping plates which are arranged on a bearing table in a front-back opposite sliding manner; the device further comprises pushing mechanisms, and the multiple pushing mechanisms are evenly arranged on the clamping plate from left to right. The clamping condition of the circuit breaker handle during operation is judged according to the pressure value sensed when the front and back opposite pressure sensors repeatedly and alternately push the circuit breaker handle. If the condition that the handle of the circuit breaker is pushed in the whole process is simulated, the pressure sensor on the pushing rod monitors the thrust required in the whole pushing process of the corresponding handle in real time, and the flexibility or the jamming condition of the handle of the circuit breaker in the whole operation process is objectively judged according to the magnitude of the thrust.

Description

Technical Field

[0001] The present invention relates to the technical field of power switch detection, and particularly to a power switch testing device for a high-voltage power distribution cabinet. Background Art

[0002] The power switches in a high-voltage power distribution cabinet mainly include circuit breakers, disconnectors, load switches, fuses, etc. Among them, a circuit breaker (as shown in Figure 8 ) can connect and disconnect the circuit under normal and fault conditions and has an arc extinguishing ability. During normal operation, the circuit can be switched on and off as needed to realize the input and withdrawal of power equipment. When the circuit has faults such as overload and short circuit, it can automatically and quickly cut off the circuit to protect the equipment and lines from damage and prevent the expansion of accidents.

[0003] Before leaving the factory, the finished circuit breaker needs to be tested for insulation performance, conductivity, arc extinguishing performance, mechanical performance, and protection performance. Among them, the mechanical performance test includes the flexibility of handle operation and the mechanical life test.

[0004] Currently, the circuit breaker is mainly operated manually by pushing the handle of the circuit breaker to perform opening and closing operations. During the operation, the tester needs to feel whether the operating force is uniform and smooth, and whether there is jamming, abnormal resistance, or obvious jerks. If the operation feels easy and unobstructed and the opening and closing actions can be completed smoothly, it usually indicates that the mechanical transmission part of the circuit breaker is relatively flexible. When detecting whether the handle is jammed by the above method, it mainly depends on the subjective feeling of people. And as the number of operations increases, due to fatigue, the perception of the jamming situation of the handle during opening and closing by people will become obvious, resulting in the detection result of the handle operation flexibility being not objective enough and the efficiency being low. In addition, when manually detecting the jamming situation, most of the time the handle is pushed in place, and the resistance during the pushing process is felt by people. However, in actual operation, after the handle passes the middle position, if the resistance of the handle jamming is less than its own elastic force at this time, the handle will continue to move under the action of its own elastic force to complete opening or closing. At this time, because the elastic reset speed of the handle is relatively fast, the resistance felt by people is relatively small. Therefore, in this case, manual operation cannot clearly judge whether the handle is jammed.

[0005] For the mechanical life test, there are mainly two methods. One is to push the handle of a single circuit breaker back and forth. This test method has accurate results but low efficiency. The other is to synchronously test multiple circuit breakers, and use a crossbar to push the handles of multiple circuit breakers synchronously. This test method has high efficiency, but it cannot judge whether the handle operation of each circuit breaker is jammed, and it is necessary to test the handle operation flexibility separately. Summary of the Invention

[0006] The present invention provides a power switch testing device for a high-voltage power distribution cabinet to solve the problems of non-objective and low-efficiency detection of the operating flexibility of the circuit breaker handle in the related art.

[0007] The present invention provides a power switch testing device for a high-voltage power distribution cabinet, which is used to detect the mechanical properties of the circuit breaker handle. It includes a supporting mechanism for conveying and supporting multiple circuit breakers, specifically including a supporting table and a conveying member; it also includes a clamping mechanism composed of two clamping plates that slide forward and backward on the upper surface of the supporting table; it further includes a pushing mechanism, and multiple pushing mechanisms are evenly arranged on the clamping plates from left to right, and two pushing mechanisms that are directly opposite to each other front and back are a group.

[0008] The pushing mechanism includes a push rod that slides through the clamping plate back and forth, a reset component fixedly installed at one end of the push rod, and a pressure sensor that slides left and right on the reset component. A V-shaped plate is fixed on the pressure sensor, and the openings of the two V-shaped plates in the same group face each other.

[0009] The power switch testing device further includes a linkage mechanism. Multiple groups of pushing mechanisms are synchronously driven by the linkage mechanism, and the push rods in the same group move reciprocally in the same direction; the smoothness of the circuit breaker handle during operation is judged by the magnitude of the pressure values sensed when the circuit breaker handle is repeatedly and alternately pushed by the directly opposite pressure sensors front and back, and the service life of the circuit breaker handle is detected by repeatedly and alternately pushing the circuit breaker handle multiple times.

[0010] Further, a groove is formed on the upper surface of the supporting table, the conveying member is installed in the groove, and the upper surface of the conveying member is flush with the upper surface of the supporting table.

[0011] Further, the two clamping plates are located on the front and rear sides of the conveying member. Bar-shaped through grooves are formed in the middle of the upper surface of the supporting table and on the front and rear sides of the conveying member. A slider that slidably penetrates the bar-shaped through groove is fixedly connected to the middle of the lower end of the clamping plate.

[0012] Further, the clamping mechanism further includes a moving member arranged on the lower surface of the supporting table for driving the two sliders to move towards each other.

[0013] Further, push and squeeze inclined plates are arranged at both ends of each clamping plate. The horizontal distance between the two relatively front and rear push and squeeze inclined plates gradually increases from the end far from the clamping plate to the end close to the clamping plate, and the minimum horizontal distance between the two push and squeeze inclined plates on the left is greater than the minimum horizontal distance between the two push and squeeze inclined plates on the right.

[0014] Further, the reset component includes a fixed frame fixed at the end of the push rod and a sliding block fixed at the end of the pressure sensor. The sliding block is slidably arranged in the fixed frame, and springs I are connected between both sides of the sliding block and the inner walls of both ends of the fixed frame.

[0015] Further, the linkage mechanism includes lifting plates distributed on the front and rear sides of the supporting table and a plurality of uniformly distributed pushing wedges fixed on the upper surfaces of the lifting plates. The inclined surfaces of the pushing wedges are in rolling contact with the ends of the pushing rods, and the widths of the pushing wedges gradually increase from top to bottom. The two lifting plates move up and down alternately. A fixing ring is arranged outside the pushing rod, and a second spring is connected between the fixing ring and the side wall of the clamping plate.

[0016] Further, one of the lifting plates is composed of a sliding plate fixed at the bottom of the pushing wedge and a fixing plate arranged under the sliding plate in a limited sliding manner. A notch is arranged on the inclined surface of the pushing wedge on this lifting plate. The width of the notch is half of the width of the pushing wedge, and the highest point of the notch is lower than half of the height of the pushing wedge.

[0017] Further, a U-shaped guide rod with an upward opening is arranged under the lifting plate. One end of the U-shaped guide rod is fixedly connected to the bottom of the lifting plate, and the other end slides through the supporting table. A limiting hole is opened on the upper surface of the supporting table corresponding to the position of the U-shaped guide rod, and a guide sleeve is fixedly connected to the lower surface of the supporting table corresponding to the position of the limiting hole. The U-shaped guide rod slides through the guide sleeve and the limiting hole.

[0018] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following technical effects: The present invention realizes the synchronous and reciprocating movement in the same direction of multiple pushing mechanisms on both sides through the linkage mechanism, alternately pushing the handles of multiple circuit breakers fixed by the clamped mechanisms to perform the simulation operation of opening and closing. If the situation where the handle of the simulated circuit breaker is pushed throughout the process is simulated, the pressure sensor on the pushing rod monitors in real time the thrust required during the whole process of pushing the corresponding handle, and objectively judges the flexibility or jamming situation of the circuit breaker handle during the whole operation through the magnitude of the thrust.

[0019] If the situation where the handle of the simulated circuit breaker is not pushed throughout the process is simulated, by moving the pushing wedge to align the notch on the pushing wedge with the pushing rod, first push the handle to a position slightly beyond the middle, and then use the pressure sensor on the pushing rod to monitor in real time the thrust required when pushing the handle during the process of opening and closing to a position slightly beyond the middle, and judge the jamming situation of the handle based on whether the handle will continue to move or the range of the thrust value of the pressure sensor on the pushing rod.

[0020] Through the pushing mechanism, the reciprocating pushing of the circuit breaker handle is used for the cyclic operation of opening and closing. After a certain number of cycles, it is tested whether the circuit breaker can be used normally to judge whether the service life of the circuit breaker handle meets the regulations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the top view of the power switch testing device provided by the embodiment of the present invention.

[0022] Figure 2It is a schematic perspective view of the power switch testing device provided by an embodiment of the present invention.

[0023] Figure 3 It is a schematic perspective view of the supporting mechanism provided by an embodiment of the present invention.

[0024] Figure 4 It is a schematic perspective view of the clamping mechanism provided by an embodiment of the present invention.

[0025] Figure 5 It is a sectional perspective view of the power switch testing device provided by an embodiment of the present invention.

[0026] Figure 6 It is a schematic structural view of the reset component and the pressure sensor provided by an embodiment of the present invention.

[0027] Figure 7 It is a schematic perspective view of the pushing wedge provided by an embodiment of the present invention.

[0028] Figure 8 It is a schematic perspective view of the circuit breaker which is the object of action of the present invention.

[0029] In the figure: 1, supporting mechanism; 11, supporting table; 12, conveying member; 13, limiting hole; 14, guiding sleeve; 15, strip-shaped through groove; 2, clamping mechanism; 21, clamping plate; 22, pushing inclined plate; 23, slider; 24, moving member; 3, pushing mechanism; 31, pushing rod; 32, reset component; 321, fixed frame; 322, first spring; 33, pressure sensor; 34, V-shaped plate; 4, linkage mechanism; 41, lifting plate; 411, fixing plate; 412, sliding plate; 42, pushing wedge; 421, notch; 43, U-shaped guide rod. Detailed Embodiment

[0030] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed embodiments of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0031] Please refer to Figure 1 , Figure 2 and Figure 3, A power switch testing device for a high-voltage switchgear cabinet, including a supporting mechanism 1, a clamping mechanism 2 slidably arranged on the supporting mechanism 1 for clamping and positioning a circuit breaker, and a pushing mechanism 3 for reciprocally pushing the handle of the circuit breaker; the supporting mechanism 1 includes a supporting table 11, and a groove with open ends is formed on the upper surface of the supporting table 11 along its length direction. The width of the groove is smaller than the length of the circuit breaker. A conveying member 12 is installed in the groove, and the upper surface of the conveying member 12 is flush with the upper surface of the supporting table 11. When the circuit breaker is placed on the conveying member 12, the lower surface of the circuit breaker can contact the upper surface of the supporting table 11, and the static friction between the circuit breaker and the conveying member 12 is greater than the friction between it and the supporting table 11, so that the conveying member 12 can smoothly convey the circuit breaker to the detection position.

[0032] It should be noted that the conveying member 12 can be a belt conveyor or a chain plate conveyor. When sampling the finished circuit breaker, it is necessary to cooperate with an external manipulator to grab the finished circuit breaker on the production line onto the conveying member 12.

[0033] Please refer to Figure 2 and Figure 4 , the clamping mechanism 2 includes two symmetric clamping plates 21 distributed on the front and rear sides of the conveying member 12. The two clamping plates 21 are slidably arranged on the upper surface of the supporting table 11 in opposite directions, and a pushing inclined plate 22 is provided at each end of each clamping plate 21. The horizontal distance between the two opposite pushing inclined plates 22 in the front and rear gradually increases from the end far from the clamping plate 21 to the end close to the clamping plate 21, and the minimum horizontal distance between the two pushing inclined plates 22 on the left is greater than the minimum horizontal distance between the two pushing inclined plates 22 on the right.

[0034] The finished circuit breaker grabbed by the manipulator is conveyed from the left end to the right end of the conveying member 12. When the first circuit breaker contacts the two pushing inclined plates 22 on the right end, the first circuit breaker stops moving, and the subsequent circuit breakers grabbed by the manipulator will be limited by the previous circuit breaker. In this way, the mechanical properties of multiple circuit breakers can be detected at one time.

[0035] Please refer to Figures 3, Figure 4 and Figure 5, a strip-shaped through groove 15 is opened in the middle of the upper surface of the supporting table 11 and on the front and rear sides of the conveying member 12. The middle part of the lower end of the clamping plate 21 is fixedly connected with a sliding block 23 that slides through the strip-shaped through groove 15. The strip-shaped through groove 15 plays a role in limiting the sliding direction of the sliding block 23; the opposite movement of the two clamping plates 21 can be driven by two electric push rods respectively, or the opposite synchronous movement of the two clamping plates 21 can be achieved through one drive; specifically, a moving member 24 for driving the two sliding blocks 23 to move towards each other is arranged on the lower surface of the supporting table 11. The moving member 24 includes a gear rotatably installed in the middle of the lower surface of the supporting table 11 and horizontal racks meshing on both sides of the gear. The horizontal racks are respectively fixedly connected with the corresponding sliding blocks 23. The gear is driven by a motor. When the gear rotates, the two racks drive the sliding blocks 23 to approach and move away from each other, realizing the clamping and unlocking of multiple circuit breakers.

[0036] The above is not the only way to achieve the opposite movement of the two clamping plates 21 through a single drive.

[0037] Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 6 , a plurality of pushing mechanisms 3 are arranged on the side wall of each clamping plate 21 and are evenly distributed along its length direction. Two opposite pushing mechanisms 3 on the two clamping plates 21 form a group. The pushing mechanism 3 includes a pushing rod 31 that slides through the clamping plate 21. A reset assembly 32 is fixed at one end of the pushing rod 31 close to the circuit breaker. A pressure sensor 33 is slidably installed on the reset assembly 32. A V-shaped plate 34 is fixed outside the pressure sensor 33. The openings of the two V-shaped plates 34 in the same group face each other. The sliding directions of the pushing rods 31 in the same group are the same; the reset assembly 32 includes a fixed frame 321 fixed at the end of the pushing rod 31 and a sliding block fixed at the end of the pressure sensor 33. The sliding block is slidably arranged in the fixed frame 321, and springs 322 are connected between both sides of the sliding block and the inner walls of both ends of the fixed frame 321.

[0038] After multiple circuit breakers move between the two clamping plates 21, the two clamping plates 21 approach each other to clamp the circuit breakers. Before the clamping plate 21 completely clamps the circuit breaker, the right push slant plate 22 will push the first circuit breaker to move left a small distance, so that the adjacent two circuit breakers fit more closely. When the clamping plate 21 completely clamps the circuit breaker in the front and rear directions, the four push slant plates 22 also squeeze the multiple circuit breakers in the left and right directions, minimizing the deviation degree between the handles of the multiple circuit breakers and the corresponding pressure sensors 33.

[0039] After that, the push rod 31 on one side gradually moves away from the handle of the circuit breaker, and the movement of the push rod 31 on the other side drives the pressure sensor 33 and the V-shaped plate 34 to approach the handle of the circuit breaker. If there is a deviation between the handle of the circuit breaker and the pressure sensor 33, it will approach or fit with either side of the V-shaped plate 34. At this time, when the V-shaped plate 34 continues to move, due to the squeezing force of the handle on the V-shaped plate 34, the V-shaped plate 34 drives the pressure sensor 33 to adjust left and right until the pressure sensor 33 is aligned with the handle of the circuit breaker. As the push rod 31 continues to move, when the pressure sensor 33 touches the handle of the circuit breaker, it will be subjected to a squeezing force. As the push rod 31 moves, the pressure value sensed by the pressure sensor 33 will change, and the handle of the circuit breaker will also be toggled to the on or off state. When the pressure sensor 33 adjusts left and right, the first spring 322 deforms. When the pressure sensor 33 separates from the handle, the first spring 322 drives the pressure sensor 33 to return to its original position.

[0040] Subsequently, the two push rods 31 start to move in the opposite direction. The pressure sensor 33 that was originally away from the handle of the circuit breaker starts to approach the handle of the circuit breaker and gradually pushes the handle of the circuit breaker until the handle of the circuit breaker is toggled to the on or off state. This reciprocating and alternating toggling simulates the situation where the handle of the circuit breaker is fully pushed. The pressure sensor 33 in contact with the handle of the circuit breaker continuously monitors the sensed pressure value, and this pressure value is the driving force value required to toggle the handle of the circuit breaker. By comparing the maximum pressure with the required thrust value range when the handle of a qualified circuit breaker is toggled, if the maximum pressure does not exceed the qualified thrust range, it indicates that the handle of the circuit breaker toggles flexibly and smoothly. If the maximum pressure exceeds the qualified thrust range, it indicates that the handle of the circuit breaker toggles stuck. By comparing with real data rather than subjective human awareness to judge the stuck or flexible situation when the handle of the circuit breaker is toggled, the mechanical performance test result of the circuit breaker is made more objective and accurate.

[0041] Please refer to Figure 2 、 Figure 3 and Figure 5, the power switch testing device further includes a linkage mechanism 4 for driving the pushing mechanism 3 to move synchronously. The linkage mechanism 4 includes lifting plates 41 distributed on the front and rear sides of the supporting platform 11 and a plurality of uniformly distributed pushing wedges 42 fixed on the upper surface of the lifting plates 41. The inclined surface of the pushing wedge 42 is in contact with the end of the pushing rod 31, and the width of the pushing wedge 42 gradually increases from top to bottom. The two lifting plates 41 move up and down alternately. Below the lifting plates 41, there is a U-shaped guide rod 43 with an upward opening. One end of the U-shaped guide rod 43 is fixedly connected to the bottom of the lifting plate 41, and the other end slides through the supporting platform 11. A limiting hole 13 is opened on the upper surface of the supporting platform 11 corresponding to the position of the U-shaped guide rod 43, and a guide sleeve 14 is fixedly connected to the lower surface of the supporting platform 11 corresponding to the position of the limiting hole 13. The U-shaped guide rod 43 slides through the guide sleeve 14 and the limiting hole 13. The setting of the guide sleeve 14 prevents the U-shaped guide rod 43 from separating from the supporting platform 11 during the descending process. The number of U-shaped guide rods 43 is at least two to avoid uneven overall stress on the lifting plates 41.

[0042] By externally driving to alternately push the U-shaped guide rods 43 on both sides, the U-shaped guide rods 43 drive the pushing wedges 42 to reciprocate through the lifting plates 41. During the movement of the pushing wedges 42, the inclined surfaces push the pushing rods 31 to move. As Figure 5 shown, in order to enable the pushing rods 31 to reset for the next push, fixing rings are arranged outside the pushing rods 31, and a second spring is connected between the fixing rings and the side walls of the clamping plates 21. When the pushing wedges 42 move up to push the pushing rods 31 to move, and the pushing wedges 42 move down, the pushing rods 31 return to their positions under the action of the second spring and always keep in contact with the inclined surfaces of the pushing wedges 42. The ends of the pushing rods 31 are rotatably embedded with balls to reduce the friction between the pushing wedges 42 and the pushing rods 31.

[0043] It should be noted that a reciprocating rotating lever can be used to alternately push the U-shaped guide rods 43, or the method of gear meshing with a rack can be used to alternately push the U-shaped guide rods 43 on both sides.

[0044] When the circuit breaker is actually in use, when its handle is pushed to a position slightly past a certain point, the handle will use the spring reset method set inside the circuit breaker to achieve the opening and closing actions. Specifically as follows: when the handle is pushed to a position slightly past a certain point, the spring reset force set inside the circuit breaker will be triggered to be released. At this time, even if the pushing force is removed, the handle will continue to complete the opening and closing actions relying on the spring reset force inside the circuit breaker.

[0045] In order to simulate the situation where the circuit breaker handle is not fully pushed during closing, a notch 421 is provided on the inclined surface of the pushing wedge 42 that pushes the circuit breaker to close. Please refer to Figure 5 and Figure 7, the width of the notch 421 is half of the width of the pushing wedge 42, and the highest point of the notch 421 is lower than half of the height of the pushing wedge 42. When simulating the closing of the circuit breaker and pushing the handle to a position slightly beyond the middle, the pushing wedges 42 on this side all need to move horizontally for position switching, that is, move in the left-right direction, so that the pushing rod 31 can contact the notch 421 during the process of being pushed. If the handle stays at a certain position in the middle without continuing to move after being pushed to a position slightly beyond the middle, and the handle does not complete the closing, it indicates that the spring reset force set inside the circuit breaker is less than the jamming resistance. Then, when the handle is operated to open the circuit breaker next time, the contact duration between the pressure sensor 33 and the corresponding handle will become shorter, and at this time, it indicates that there is a direct jamming situation with the handle. If the handle can complete the closing operation with the help of the spring reset force set inside the circuit breaker after being pushed to a position slightly beyond the middle, and when the handle is operated to open the circuit breaker next time, the contact duration between the pressure sensor 33 and the handle remains unchanged. If the maximum pressure value sensed by the pressure sensor 33 in contact with the circuit breaker handle during real-time monitoring is within the qualified thrust range, it indicates that the handle operates flexibly. If the maximum pressure value sensed by the pressure sensor 33 in contact with the circuit breaker handle during real-time monitoring exceeds the qualified thrust range, it shows that the jamming resistance is less than the spring reset force set inside the circuit breaker, and there is still a jamming situation at this time.

[0046] Continue to refer to Figure 5 , the lifting plate 41 at the lower end of the pushing wedge 42 for pushing the circuit breaker to close is composed of a sliding plate 412 fixed at the bottom of the pushing wedge 42 and a fixing plate 411 arranged in a limited sliding manner below the sliding plate 412. Specifically, the sliding of the sliding plate 412 can be driven by an electric slider.

[0047] It should be noted that if it is necessary to simulate the situation where the handle is not pushed throughout the process when opening the circuit breaker, notches 421 can be set on both sides of the pushing wedges 42, and the structures of the lifting plates 41 on both sides are kept the same. The specific pushing process and the method of judging whether the handle is jammed are the same as those of the process and judgment method when the handle is not pushed throughout the process during closing.

[0048] In addition, when detecting the service life of the circuit breaker handle, first, the handle is subjected to multiple opening and closing cycle operations through the pushing mechanism 3 to check the wear of the mechanical components inside the circuit breaker or the circuit breaker is connected to the power supply for detection. If the wear of the mechanical components inside the circuit breaker is small or the circuit breaker can be used normally, it indicates that the circuit breaker handle meets the specified mechanical life requirements.

[0049] In the embodiments of the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0050] In the description of the present invention, it should also be noted that, unless otherwise clearly specified or limited, the terms "arranged", "connected", "installed" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, an integral connection or a sliding connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0051] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A power switch testing device for a high-voltage distribution cabinet, used to detect the mechanical properties of a circuit breaker handle, characterized in that: include: A supporting mechanism, used for conveying and supporting a plurality of circuit breakers, including a supporting platform and a conveying member; The clamping mechanism is composed of two clamping plates which are slidably arranged on the upper surface of the supporting platform. The pushing mechanisms are evenly arranged on the clamping plate from left to right, and two pushing mechanisms facing each other front and back form a group; The pushing mechanism includes a pushing rod that slides forward and backward and penetrates the clamping plate, a reset assembly that is fixedly mounted on one end of the pushing rod, and a pressure sensor that slides left and right on the reset assembly, and a V-shaped plate is fixed on the pressure sensor; It also includes a linkage mechanism, wherein the plurality of groups of pushing mechanisms are synchronously driven by the linkage mechanism, and the pushing rods in the same group move back and forth in the same direction; When simulating the situation where the circuit breaker handle is pushed all the way, the pressure values ​​sensed by the front and rear pressure sensors that are opposite to each other are used to judge the jamming of the circuit breaker handle during operation; when simulating the situation where the circuit breaker handle is not pushed all the way, the circuit breaker handle is pushed to a position slightly past the middle to judge the jamming of the handle by whether the circuit breaker handle continues to move or the thrust value range of the pressure sensor on the push rod.

2. The power switch testing device for a high-voltage distribution cabinet according to claim 1, characterized in that: A groove is provided on the upper surface of the supporting platform, and the conveying member is installed in the groove, and the upper surface of the conveying member is flush with the upper surface of the supporting platform.

3. The power switch testing device for a high-voltage distribution cabinet according to claim 1, characterized in that: The two clamping plates are located at the front and rear sides of the conveying member, a strip through slot is opened in the middle of the upper surface of the supporting platform and located at the front and rear sides of the conveying member, and a slider that slides through the strip through slot is fixedly connected to the middle of the lower end of the clamping plate.

4. The power switch testing device for a high-voltage power distribution cabinet according to claim 3 is characterized in that: The clamping mechanism also includes a moving part arranged on the lower surface of the supporting platform and used for driving the two sliding blocks to move toward each other.

5. The power switch testing device for a high-voltage power distribution cabinet according to claim 3, characterized in that: Each clamping plate is provided with a pushing inclined plate at both ends, and the horizontal distance between the two opposite front and rear pushing inclined plates gradually increases from the end farthest from the clamping plate to the end close to the clamping plate, and the minimum horizontal distance between the two pushing inclined plates on the left is greater than the minimum horizontal distance between the two pushing inclined plates on the right.

6. The power switch testing device for a high-voltage distribution cabinet according to claim 1, characterized in that: The reset assembly comprises a fixed frame fixed at the end of the push rod and a sliding block fixed at the end of the pressure sensor. The sliding block is slidably arranged in the fixed frame, and both sides of the sliding block and the inner walls of both ends of the fixed frame are connected with springs.

7. The power switch testing device for a high-voltage power distribution cabinet according to claim 1, characterized in that: The linkage mechanism includes lifting plates distributed on the front and rear sides of the support platform and a plurality of evenly distributed pushing wedges fixed on the upper surface of the lifting plates. The inclined surface of the pushing wedge is in rolling contact with the end of the pushing rod, and the width of the pushing wedge gradually increases from top to bottom. The two lifting plates move up and down alternately. A fixing ring is arranged on the outside of the pushing rod, and a second spring is connected between the fixing ring and the side wall of the clamping plate.

8. The power switch testing device for a high-voltage power distribution cabinet according to claim 7, characterized in that: One of the lifting plates consists of a sliding plate fixed to the bottom of the pushing wedge and a fixed plate with a limited sliding arrangement below the sliding plate, and a notch is arranged on the inclined surface of the pushing wedge on the lifting plate, the width of the notch is half the width of the pushing wedge, and the highest point of the notch is lower than half the height of the pushing wedge.

9. The power switch testing device for a high-voltage power distribution cabinet according to claim 7, characterized in that: A U-shaped guide rod with an opening facing upward is arranged below the lifting plate, one end of the U-shaped guide rod is fixedly connected to the bottom of the lifting plate, and the other end slides through the supporting platform.

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