A vacuum circuit breaker withstand voltage detection device

Abstract

The application relates to the technical field of power equipment detection, in particular to a vacuum circuit breaker withstand voltage detection device, which comprises a workbench, a positioning rod, a guide rod, a lifting plate, a lifting frame, a sleeve, a conductive rod, a buffer spring, a detection assembly and a power assembly. The workbench top rear side is connected with the positioning rod, the right side area of the workbench is provided with the detection assembly, the workbench inside both sides are fixed with the guide rods, the lifting plate is slidingly connected between the two guide rods, the lifting plate upper surface rear side is fixedly connected with the lifting frame, the lifting frame upper side is fixedly provided with three sleeves, and the conductive rods are slidingly arranged in the sleeves. The power assembly drives the lifting plate to vertically lift along the guide rod, drives the conductive contact of the conductive rod to automatically complete the butt joint or separation with the circuit breaker wiring terminal, the whole wiring process does not need the operating personnel to manually operate in the workbench high-voltage area, so that the personnel close contact with the high-voltage live parts is fundamentally avoided, and the risk of personal electric shock is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of power equipment testing technology, and in particular to a vacuum circuit breaker withstand voltage testing device. Background Technology

[0002] Vacuum circuit breakers are widely used in power systems for switching control and fault protection due to their excellent arc-extinguishing performance, compact structure, and long maintenance cycle. To ensure the safe and reliable operation of vacuum circuit breakers at their rated operating voltage, insulation withstand voltage tests are required before leaving the factory and during operation and maintenance to verify whether their insulation structure meets design requirements and operating standards. Currently, the insulation withstand voltage test of vacuum circuit breakers typically uses a power frequency withstand voltage test method. This involves applying a power frequency AC voltage higher than the rated voltage to the circuit breaker under test through a test transformer and maintaining it for a specified time. The insulation performance is judged based on whether breakdown or flashover occurs.

[0003] However, in existing withstand voltage testing operations, the high-voltage test circuit is generally constructed manually by wiring. Operators must approach the circuit breaker at close range, clamping the high-voltage test clips at the end of the high-voltage test cable one by one to the three terminals on top of the circuit breaker. After the test is completed, the clips are manually removed. During this process, the operator's hands and body are close to the high-voltage live parts. Although power-off and grounding measures are usually taken during testing, the wiring operation itself still carries the risk of accidentally touching live parts. This is especially true when frequently changing the circuit breaker under test, as operators repeatedly approach the high-voltage area, posing a significant safety hazard.

[0004] Therefore, it is indeed necessary to provide a vacuum circuit breaker withstand voltage testing device to overcome or at least alleviate at least one of the problems existing in the prior art. Summary of the Invention

[0005] To overcome the shortcomings of existing withstand voltage testing operations, which require operators to be close to high-voltage live parts for manual wiring and pose significant safety hazards, this invention provides a vacuum circuit breaker withstand voltage testing device.

[0006] The technical solution is as follows: A vacuum circuit breaker withstand voltage testing device includes a workbench, a positioning rod, a guide rod, a lifting plate, a lifting frame, sleeves, conductive rods, buffer springs, a testing component, and a power component. A positioning rod is connected to the rear top of the workbench. The testing component is located on the right side of the workbench. Guide rods are fixed on both sides inside the workbench. The lifting plate is slidably connected between two guide rods. A lifting frame is fixed to the rear upper surface of the lifting plate. Three sleeves are fixed at intervals on the upper side of the lifting frame. A conductive rod is slidably installed inside each sleeve. The conductive rod consists of a rod body and conductive contacts fixed to the top of the rod body. The conductive contacts correspond one-to-one with the three terminals on the circuit breaker. Buffer springs are installed between the lower end of the conductive rod and the wall of the lifting frame. A power component is located inside the workbench.

[0007] Furthermore, the testing components include a withstand voltage control console, low-voltage control cables, a test transformer, and high-voltage test cables. The withstand voltage control console is located on the right side of the workbench, and the test transformer is arranged adjacent to the withstand voltage control console. The withstand voltage control console is electrically connected to the test transformer through multiple low-voltage control cables. Several high-voltage test cables are led out from the test transformer, and high-voltage test clips are configured at the ends of the high-voltage test cables. These high-voltage test clips can be clamped onto the conductive contacts of the conductive rod.

[0008] Furthermore, the conductive contacts are made of copper-tungsten alloy, and their mating surfaces are silver-plated.

[0009] Furthermore, the power assembly includes steering gears, rotating shafts, lead screws, and dual-axis motors. Four steering gears are arranged in a rectangular shape at the bottom of the worktable. These steering gears are bevel gear steering gears with three shaft interfaces. Two of these interfaces are horizontal with a 90-degree angle, and the third interface faces upwards. A dual-axis motor is installed on the right side of the bottom of the worktable, between the two right-side steering gears. The two horizontal shaft interfaces of adjacent steering gears are connected via rotating shafts. The two steering gear shaft interfaces facing the output shaft of the dual-axis motor are connected to the corresponding output shafts of the dual-axis motor. In other words, there are three rotating shafts, located in the forward / backward and left-side directions. The right side is directly connected to the two output shafts of the dual-axis motor. Lead screws are power-connected to the top shaft interfaces of each steering gear. The top of each lead screw passes through the top of the worktable and is rotatably connected to it. The lead screw also passes through the lifting plate and is threadedly connected to it. The dual-axis motor is electrically connected to the pressure-resistant control console.

[0010] Furthermore, it also includes slide rails, moving blocks, slide rods, clamping blocks, clamping springs, push rods, tripods, fixed rods, and tension springs. Slide rails are fixed on both sides of the top of the worktable. Moving blocks are slidably connected between the two slide rails on both sides. Two slide rods are slidably mounted on each moving block. Clamping blocks are connected between the inner ends of the two slide rods on the same moving block. Clamping springs are fitted on the outer sides of the slide rods. The two ends of the clamping springs are connected to the outer wall of the clamping block and the moving block, respectively. Push rods are fixed on both sides of the lifting plate. Tripods are connected to both sides of the bottom of the moving blocks. The push rods on both sides form an inclined surface contact relationship with the inclined sections of the two tripods on the corresponding sides. Fixed rods are symmetrically fixed on the outer sides of the moving blocks. Fixed rods are also fixed on both sides of the top of the worktable at positions corresponding to the fixed rods on the moving blocks. Tension springs are connected between the two fixed rods at corresponding positions on the same side.

[0011] Furthermore, a buffer pad layer is fixedly installed on the side of the clamping block that contacts the outer wall of the circuit breaker. The buffer pad layer is made of silicone rubber.

[0012] Furthermore, it also includes protective plates, transmission rods, avoidance springs, and rotating rods. Protective plates are rotatably connected to the four outer walls of the worktable via hinges. Transmission rods are slidably connected to the four corners of the lifting plate. Rotating rods are rotatably connected to the bottom of each transmission rod. The upper end of each rotating rod is rotatably connected to the inner wall of the corresponding protective plate. Avoidance springs are connected between the lower end of the rotating rod and the bottom of the lifting plate.

[0013] Furthermore, it also includes fixed frames, auxiliary wheels, moving rods, electrical terminals, guide blocks, racks, and spur gears. Multiple fixed frames are spaced apart on the front bottom of the worktable. Auxiliary wheels are rotatably connected to the upper part of each fixed frame. The moving rods slide between the fixed frames, with the top surface of the moving rods rolling against the bottom surface of the auxiliary wheels. A rack is connected to the bottom of the moving rods. Spur gears are rotatably connected to the lower part of each fixed frame via a rotating shaft. A spur gear is also fixedly connected to the front output shaft of the dual-axis motor. The rack meshes with all the spur gears. Multiple electrical terminals are fixedly fixed at the right end of the moving rods. A guide block is connected to the right side of the bottom of the worktable. The moving rods and racks slide in cooperation with the guide block. A notch is provided at the lower end of the right protective plate to avoid the moving rods. A cable outlet groove is provided on the top left side of the moving rods, communicating with its inner cavity. A clearance groove is provided on the front side of the lifting plate corresponding to the position of the moving rods. Multiple through holes are provided at intervals on the upper side of the lifting frame near each conductive rod.

[0014] Beneficial effects: 1. The lifting plate is driven to rise and fall vertically along the guide rod by the power component, which drives the conductive contact of the conductive rod to automatically connect or disconnect with the circuit breaker terminal. The entire wiring process does not require the operator to enter the high-voltage area of ​​the workbench for manual operation, thereby fundamentally avoiding close contact between personnel and high-voltage live parts and greatly reducing the risk of electric shock.

[0015] 2. When the lifting plate rises, the push rod drives the clamping block to move inward through the inclined surface of the tripod. At the same time as the conductive rod is connected, the circuit breaker is clamped and positioned laterally, which effectively prevents the circuit breaker from shifting during the test and ensures that the wiring terminals and conductive contacts are always accurately aligned.

[0016] 3. A buffer spring is installed between the lower end of the conductive rod and the lifting frame to absorb the impact force when the conductive contact and the terminal block are connected. The clamping spring also provides elastic buffering during the clamping process of the clamping block. The double buffering mechanism effectively protects the conductive contact, terminal block and circuit breaker housing from hard damage.

[0017] 4. When the lifting platform rises, it drives the surrounding protective plates to unfold outward through the transmission rod and rotating rod, forming a physical isolation barrier around the workbench. This increases the safe distance between the high-voltage live area and the outside world, effectively preventing personnel from accidentally approaching and significantly improving the protection level of high-voltage withstand voltage testing operations.

[0018] 5. The moving rod extends synchronously with the movement of the dual-axis motor, pushing the electrical terminals from inside the workbench to the outside, away from the high-voltage testing area. Operators can clamp the high-voltage test leads at a safe distance, greatly increasing the physical distance between the high-voltage live parts and the operator, effectively reducing the risk of accidental contact. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the worktable, slide rail, and moving block components of the present invention.

[0021] Figure 3 This is a three-dimensional structural diagram of the guide rod, lifting plate, and lifting frame of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the steering gear, rotating shaft, and lead screw components of the present invention.

[0023] Figure 5 This is a three-dimensional structural diagram of the moving block, sliding rod, and clamping block of the present invention.

[0024] Figure 6 This is a three-dimensional structural diagram of the lifting frame, sleeve, and conductive rod of the present invention.

[0025] Figure 7 This is a three-dimensional structural diagram of the sleeve, conductive rod, and buffer spring components of the present invention.

[0026] Figure 8 This is a three-dimensional structural diagram of the clamping spring, push rod, and tripod of the present invention.

[0027] Figure 9 This is a three-dimensional structural diagram of the tripod, fixing rod, tension spring, and other components of the present invention.

[0028] Figure 10 This is a schematic diagram of the planar structure of the moving block, push rod, and tripod of the present invention.

[0029] Figure 11 This is a three-dimensional structural diagram of the protective plate, transmission rod, and avoidance spring of the present invention.

[0030] Figure 12 This is a three-dimensional structural diagram of the components of the present invention, including the fixing frame, auxiliary wheels, and moving rod.

[0031] The above-mentioned figures include the following reference numerals: 1: withstand voltage control console; 101: low-voltage control cable; 102: test transformer; 103: high-voltage test cable; 104: workbench; 105: circuit breaker; 106: positioning rod; 107: guide rod; 108: lifting plate; 109: lifting frame; 1010: sleeve; 1011: conductive rod; 1012: buffer spring; 201: steering gear; 202: rotating shaft; 203: lead screw; 204: dual-axis motor; 301: slide rail; 302: moving... Block, 303: Slide rod, 304: Clamping block, 305: Clamping spring, 306: Push rod, 307: Tripod, 308: Fixed rod, 309: Tension spring, 401: Protective plate, 402: Transmission rod, 403: Avoidance spring, 404: Rotating rod, 501: Fixed frame, 502: Auxiliary wheel, 503: Moving rod, 504: Electrical terminal, 505: Guide block, 506: Cable outlet groove, 507: Rack, 508: Spur gear, 509: Notch, 5010: Avoidance groove, 5011: Through hole. Detailed Implementation

[0032] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0033] Example 1: A vacuum circuit breaker withstand voltage testing device, such as... Figures 1-7As shown, the device includes a workbench 104, a positioning rod 106, a guide rod 107, a lifting plate 108, a lifting frame 109, a sleeve 1010, a conductive rod 1011, a buffer spring 1012, a detection assembly, and a power assembly. The positioning rod 106 is bolted to the rear top of the workbench 104. The circuit breaker 105 to be tested is placed on the workbench 104, with its rear end abutting against the positioning rod 106. The positioning rod 106 longitudinally limits the circuit breaker 105 to achieve precise positioning. A detection assembly is located on the right side of the workbench 104 for conducting withstand voltage tests on the circuit breaker 105. Guide rods 107 are vertically fixed through both sides of the workbench 104. The lifting plate 108 is vertically slidably connected to the two guide rods 107. Between, and the lifting plate 108 is located inside the workbench 104. The lifting frame 109 is fixedly connected to the rear side of the upper surface of the lifting plate 108. An opening adapted to the lifting frame 109 is opened on the rear side of the top of the workbench 104. The lifting frame 109 slides in the opening and can extend vertically along the opening. Three sleeves 1010 are fixedly fixed through the upper side of the lifting frame 109 in parallel at intervals. A conductive rod 1011 is vertically slidably arranged in each sleeve 1010. The conductive rod 1011 is composed of a rod body and a conductive contact fixed at the top of the rod body. The conductive contact corresponds one-to-one with the three terminals on the circuit breaker 105. A buffer spring 1012 is provided between the lower end of the conductive rod 1011 and the wall of the lifting frame 109. A power component is provided inside the workbench 104 to drive the lifting of the conductive rod 1011.

[0034] like Figure 1 As shown, the testing assembly includes a withstand voltage control console 1, a low-voltage control cable 101, a test transformer 102, and a high-voltage test cable 103. The withstand voltage control console 1 is located on the right side of the workbench 104. The test transformer 102 is arranged adjacent to the withstand voltage control console 1. The withstand voltage control console 1 is electrically connected to the test transformer 102 via multiple low-voltage control cables 101. Several high-voltage test cables 103 are led out from the test transformer 102. A high-voltage test clip is provided at the end of each high-voltage test cable 103, which can clamp onto a conductive rod. When the conductive rod 1011 rises, its conductive contact connects with the terminal of the circuit breaker 105 to establish a high-voltage test circuit and perform insulation withstand voltage testing. This method does not require the operator to approach the workbench 104. The conductive contact is made of copper-tungsten alloy and its mating end is silver-plated. Copper-tungsten alloy has both excellent conductivity and anti-arc erosion ability. The silver plating further reduces contact resistance and improves oxidation resistance, ensuring stable contact and low heat generation when high voltage and high current pass through, thus extending the service life of the contact.

[0035] like Figures 4-6As shown, the power assembly includes a steering gear 201, a rotating shaft 202, a lead screw 203, and a dual-axis motor 204. Four steering gears 201 are arranged in a rectangular pattern on the bottom of the worktable 104. Each steering gear 201 is a bevel gear steering gear with three shaft interfaces. Two of these interfaces are horizontal with a 90-degree angle between them, and the third interface faces upwards. The dual-axis motor 204 is installed on the right side of the bottom of the worktable 104, between the two right-side steering gears 201. The two horizontal shaft interfaces of adjacent steering gears 201 are connected by a rotating shaft 202. The two steering gear 201 shaft interfaces facing the output shaft of the dual-axis motor 204 are respectively connected to the corresponding output shafts of the dual-axis motor 204. There are three rotating shafts 202, located in the front-back direction and the left direction respectively. The right side is directly connected by the two output shafts of the dual-axis motor 204. The top shaft interface of the steering gear 201 is poweredly connected to the lead screw 203. The top of the lead screw 203 passes through the top of the worktable 104 and is rotatably connected to it. The lead screw 203 passes through the lifting plate 108 and is threadedly connected to the lifting plate 108. The power reversal transmission between the rotating shaft 202, the lead screw 203 and the steering gear 201, as well as between the output shaft of the dual-axis motor 204 and the steering gear 201, is achieved through the bevel gear inside the steering gear 201. The dual-axis motor 204 is electrically connected to the pressure-resistant control console 1, and its operation is uniformly controlled by the pressure-resistant control console 1.

[0036] When performing withstand voltage testing, the first step is to complete the preliminary preparation of the equipment and the positioning of the workpiece. The operator places the circuit breaker 105 to be tested stably on the designated area on the top surface of the workbench 104, and manually fine-tunes the position of the circuit breaker 105 so that its rear end face is in close contact with the positioning rod 106. The longitudinal positioning of the circuit breaker 105 is achieved through the limiting action of the positioning rod 106, which effectively avoids measurement errors caused by workpiece displacement during the testing process.

[0037] After the workpiece is positioned, the detection circuit is pre-connected: the high-voltage test clamp at the end of the high-voltage test cable 103 led out from the test transformer 102 is firmly clamped to the conductive contact of the conductive rod 1011, preparing for the subsequent conduction of the high-voltage withstand voltage detection circuit. Then, the power drive stage begins. The withstand voltage control console 1 issues a control command, driving the dual-axis motor 204 to rotate forward via electrical connection. The two output shafts of the dual-axis motor 204 output rotational power, which is transmitted to the shaft interfaces of the corresponding steering gear 201. The shaft interfaces of adjacent steering gears 201, forming a 90-degree horizontal angle, transmit and connect power sequentially through the rotating shaft 202. Under the meshing transmission of the bevel gears inside the steering gear 201, the rotational power is changed from the horizontal direction to the vertical direction, ultimately driving each lead screw 203 to rotate synchronously in the forward direction. The rotational motion of the lead screw 203 is converted into the vertical upward sliding of the lifting plate 108 along the guide rod 107. The rise of the lifting plate 108 drives the lifting frame 109, sleeve 1010, and conductive rod 1011 to rise synchronously. The conductive contacts at the top of the circuit breaker 105 gradually approach and finally precisely connect with the three terminals of the circuit breaker 105, thus establishing a complete high-voltage test circuit connecting the circuit breaker 105. During the connection process, the buffer spring 1012 provides necessary elastic buffering to absorb the impact force of the connection and protect the conductive contacts and terminals from rigid damage. Subsequently, the operator operates the withstand voltage control console 1 to output control signals, which are transmitted to the test transformer 102 via the low-voltage control cable 101. The test transformer 102 is started to increase the voltage, and the test transformer 102 generates a high-voltage test voltage. The high-voltage electricity is transmitted to the conductive contacts of the conductive rod 1011 through the high-voltage test cable 103 and conducted to the terminals of the circuit breaker 105, applying a standard withstand voltage test voltage to the circuit breaker 105 to complete the insulation withstand voltage performance test of the circuit breaker 105. The entire test process does not require the operator to approach the high-voltage area of ​​the workbench 104, thus effectively ensuring the personal safety of the operator. At the same time, relying on the automated connection and testing mode of the equipment, the testing efficiency and the accuracy of the test data are significantly improved.

[0038] After the withstand voltage test is completed, the withstand voltage control console 1 first controls the test transformer 102 to stop high voltage output and perform internal discharge. Then, the withstand voltage control console 1 issues a reverse control command to drive the dual-axis motor 204 to rotate in the opposite direction. The output power of the dual-axis motor 204 is again transmitted through the steering gear 201, the rotating shaft 202 and its internal bevel gears to drive the four lead screws 203 to rotate synchronously in the opposite direction. The reverse rotation of the lead screws 203 causes the lifting plate 108 to slide vertically downward along the guide rod 107, thereby driving the lifting frame 109, the sleeve 1010 and the conductive rod 101. 1. The entire device descends, safely separating the conductive contact at the top of the conductive rod 1011 from the terminal of the circuit breaker 105 and disengaging it. The operator can then safely approach the workbench 104 and remove the tested circuit breaker 105, replace it with a new circuit breaker 105 to be tested, and proceed with the next round of withstand voltage testing following the same procedure. During the operation of the device, if an emergency occurs, the operator can also implement an emergency stop through the withstand voltage control console 1, immediately interrupting the operation of the dual-axis motor 204 and the high-voltage output of the test transformer 102 to ensure the safety of equipment and personnel in case of emergencies.

[0039] Example 2: Based on Example 1, such as Figures 2-5 and Figures 8-10As shown, it also includes a slide rail 301, a moving block 302, a slide rod 303, a clamping block 304, a clamping spring 305, a push rod 306, a tripod 307, a fixing rod 308, and a tension spring 309. The top of the worktable 104 is bolted to both the front and rear sides with slide rails 301. Moving blocks 302 are slidably connected between the two slide rails 301 on the left and right sides respectively. Two parallel, spaced slide rods 303 slide through each moving block 302. Two slide rods 303 on the same moving block 302... Clamping blocks 304 are fixedly connected to the inner ends of the sliding rods 303. The clamping blocks 304 on the left and right sides are respectively arranged on the left and right sides of the circuit breaker 105 to be tested, and are used to lock the position of the circuit breaker 105 in the horizontal direction. A buffer pad layer made of silicone rubber is fixedly provided on the side of the clamping block 304 that contacts the outer wall of the circuit breaker 105. The buffer pad layer forms a flexible contact between the clamping block 304 and the outer shell of the circuit breaker 105 to avoid damage to the outer shell of the circuit breaker 105 when the clamping force is too large. To prevent indentation or damage, clamping springs 305 are fitted on the outer side of the slide rod 303. The two ends of the clamping springs 305 are fixedly connected to the outer wall of the clamping block 304 and the moving block 302, respectively. Push rods 306 are fixed on the left and right sides of the lifting plate 108, respectively. Tripods 307 are bolted to the front and rear sides of the bottom of the moving block 302. A sliding groove is provided on the top surface of the worktable 104 corresponding to the position of the tripod 307. The length of the sliding groove is adapted to the sliding stroke of the moving block 302. The tripod 307 passes through the sliding groove. The push rod 306 extends into the workbench 104 and is vertically aligned with the push rod 306. The push rods 306 on both sides form a beveled contact with the inclined sections of the two triangular frames 307 on the corresponding sides. The outer side of the moving block 302 is symmetrically fixed with fixing rods 308. The top left and right sides of the workbench 104 are also fixed with fixing rods 308 at positions corresponding to the fixing rods 308 on the moving block 302. A tension spring 309 connects the two fixing rods 308 at corresponding positions on the same side.

[0040] When the lifting plate 108 rises vertically along the guide rod 107 under the drive of the lead screw 203, the push rod 306 moves upward synchronously with the lifting plate 108. The upper end of the push rod 306 gradually touches the inclined section of the tripod 307 and slides continuously along its inclined surface. Through the action of the inclined surface, the push rod 306 smoothly converts the vertical upward thrust into the horizontal inward driving force of the tripod 307, thereby driving the tripod 307 together with the moving block 302 to move horizontally along the slide rail 301 towards the inside of the worktable 104. The moving block 302 drives the slide rod 303, the clamping block 304 and the fixed rod 308 on it to move inward synchronously. The tension spring 309 is stretched and stores elastic potential energy. The clamping blocks 304 on both sides gradually approach and abut against the outer wall of the circuit breaker 105. As the moving block 302 continues to move inward, the clamping block 309 moves inward. The spring 305 is compressed to provide necessary elastic buffering, thereby enabling the clamping block 304 to synchronously lock the position of the circuit breaker 105 when the conductive rod 1011 is connected to the terminal of the circuit breaker 105. When the withstand voltage test is completed and the lifting plate 108 is driven to descend vertically, the push rod 306 moves down and gradually disengages from the inclined section of the tripod 307. The horizontal thrust on the inner side of the moving block 302 is eliminated. At this time, the tension spring 309 releases the stored elastic potential energy and retracts to reset, driving the moving block 302 to slide horizontally outward along the slide rail 301. The clamping block 304 moves away from the circuit breaker 105 at the same time, thereby releasing the lateral position lock of the circuit breaker 105. The clamping spring 305 also rebounds to reset, and the circuit breaker 105 returns to its free state so that the staff can safely remove it.

[0041] like Figure 1 and Figure 11 As shown, it also includes a protective plate 401, a transmission rod 402, a clearance spring 403, and a rotating rod 404. The four outer side walls of the worktable 104 are all rotatably connected to the protective plate 401 via hinges. The four corners of the lifting plate 108 are all vertically slidably connected to the transmission rod 402. The bottom end of each transmission rod 402 is rotatably connected to an obliquely arranged rotating rod 404. The upper end of the rotating rod 404 is rotatably connected to the inner side wall of the corresponding protective plate 401. The lower end of the rotating rod 404 is connected to the bottom of the lifting plate 108 via a clearance spring 403.

[0042] When the lifting plate 108 rises vertically along the guide rod 107 under the drive of the power component, the transmission rod 402 moves upward synchronously with the lifting plate 108 through the avoidance spring 403. The upward movement of the transmission rod 402 causes the rotating rod 404 to deflect, increasing the angle between the rotating rod 404 and the vertical direction. This, in turn, drives the corresponding protective plate 401 to smoothly unfold outward around its hinge through the rotational connection. When the lifting plate 108 reaches the highest working position, the four protective plates 401 are fully unfolded outward to their maximum angle, forming an extended protective barrier around the workbench 104. This barrier effectively increases the safe distance between the high-voltage live area and the external environment, preventing the risk of electric shock or accidental contact caused by personnel accidentally approaching the surface of the workbench 104. This significantly improves the safety protection level of the device for high-voltage operations. When debris accumulates around the workbench 104... When temporary obstructions exist due to space limitations, preventing the protective plate 401 from fully unfolding along the predetermined trajectory, the avoidance spring 403 undergoes adaptive tensile deformation based on the resistance encountered by the rotating rod 404. This absorbs and buffers the reverse resistance, ensuring that the lifting plate 108 can continue to complete its vertical upward stroke. This prevents the protective plate 401 from jamming and interfering with the normal operation of the lifting plate 108, thereby ensuring the precise connection between the conductive rod 1011 and the terminal of the circuit breaker 105. When the withstand voltage test ends and the lifting plate 108 descends vertically to reset, the transmission rod 402 and the rotating rod 404 move down synchronously. Under the combined action of the traction of the rotating rod 404 and its own gravity, the protective plate 401 smoothly retracts around the hinge and automatically returns to the closed state against the side wall of the workbench 104. This saves storage space and prepares the protective plate for unfolding in the next round of testing operations.

[0043] like Figure 6 , Figure 11 and Figure 12As shown, it also includes a fixed frame 501, auxiliary wheels 502, a moving rod 503, a power terminal 504, a guide block 505, a rack 507, and a spur gear 508. Four fixed frames 501 are installed parallel to each other along the front side of the bottom of the worktable 104. Each fixed frame 501 is rotatably connected to an auxiliary wheel 502. The moving rod 503 has a hollow square tube structure and slides between the four fixed frames 501. The top surface of the moving rod 503 rolls against the bottom surface of the auxiliary wheel 502. The moving rod 503 is fixedly connected to the bottom of a rack 507. Each fixed frame 501 has a spur gear 508 rotatably connected to its lower part via a rotating shaft. A spur gear 508 is also fixedly connected to the front output shaft of the dual-axis motor 204. This spur gear 508 and the spur gears 508 on each fixed frame 501 are arranged in the same straight line. The rack 507 meshes with all the spur gears 508. Multiple electrical terminals 504 are fixedly inserted through the right end of the moving rod 503 at intervals. The bottom right side of the worktable 104 is fixed... A guide block 505 is fixedly connected to the moving rod 503 and the rack 507, which are slidably engaged with the guide block 505. The guide block 505 provides additional guiding support. A notch 509 is provided at the lower end of the right protective plate 401 to provide clearance space for the extension of the moving rod 503 and the rack 507. A cable outlet groove 506 is provided on the top left side of the moving rod 503, which is connected to its inner cavity. A clearance groove 5010 is provided on the front side of the lifting plate 108 corresponding to the position of the moving rod 503. The upper side of the lifting frame 109 is close to each Multiple through holes 5011 are spaced apart on the conductive rod 1011. During the test preparation stage, a conductive cable is connected to the power terminal 504. The conductive cable passes through the hollow tube inside the moving rod 503, extends upward from the outlet groove 506, passes through the clearance groove 5010, and finally extends upward from the through hole 5011 of the lifting frame 109 and connects to the conductive contact of the conductive rod 1011. The high-voltage test lead on the test transformer 102 can be clamped to each power terminal 504 by the high-voltage test clamp.

[0044] While the dual-axis motor 204 starts in the forward direction to drive the lifting plate 108 to rise, its front output shaft drives the spur gear 508 to rotate. The rotational motion of the spur gear 508 is converted into the horizontal translational motion of the moving rod 503 through the rack 507. Under the continuous drive of the spur gear 508, the moving rod 503 smoothly extends to the right with the help of the rolling engagement of the auxiliary wheel 502 and the auxiliary meshing support of the spur gear 508 on the fixed frame 501. The auxiliary wheel 502 is located on the moving rod. During translation, rolling friction replaces sliding friction, effectively reducing motion resistance. The spur gear 508 on the fixed frame 501 rotates synchronously under the drive of the rack 507, providing balanced support and guiding assistance, ensuring a smooth and stable extension of the moving rod 503. When the moving rod 503 extends to the right, its electrical terminal 504 extends from inside the worktable 104 to the outside. The notch 509 at the lower end of the right-side protective plate 401 provides sufficient clearance for the moving rod 503 and rack 507. After the energizing terminal 504 is fully extended to the predetermined position, it is significantly away from the workbench 104 body area. The operator can clamp the high-voltage test lead of the test transformer 102 onto each energizing terminal 504 at a safe distance away from the high-voltage testing center using high-voltage test clamps. This energizing method significantly increases the physical distance between the high-voltage live parts and the operator compared to directly clamping the high-voltage test lead onto the contact of the conductive rod 1011, expanding the safety protection range and effectively reducing the risk of accidental contact during high-voltage testing. At the same time, the high-voltage test circuit between the conductive rod 1011 and the circuit breaker 105 terminal block is achieved by the pre-installed connection of the internal conductive cable: the high-voltage electricity introduced by the energizing terminal 504 is safely delivered to the conductive contact of the conductive rod 1011 through the conductive cable passing through the inner cavity of the moving rod 503, the outlet groove 506, the clearance groove 5010, and the through hole 5011, and then completes the withstand voltage test through the connected circuit breaker 105 terminal block.

[0045] After the withstand voltage test is completed and the high-voltage test cable 103 is released from clamping, the dual-axis motor 204 reverses its rotation, the lifting plate 108 descends and resets, and the spur gear 508 on the front output shaft of the dual-axis motor 204 rotates in the reverse direction, driving the moving rod 503 to move to the left in the reverse direction through the rack 507, gradually retracting it from the extended state into the worktable 104. The power connection terminal 504 also retracts to its initial position simultaneously. The moving rod 503 and rack 507 retract and reset. Thus, the entire power connection extension mechanism completes a complete working cycle, realizing both the remote arrangement of the high-voltage connection terminal during the testing process and the automatic retraction and storage after the test, providing a reliable guarantee for the safe and convenient operation of the next round of testing.

[0046] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A withstand voltage testing device for a vacuum circuit breaker, characterized in that, The system includes a worktable (104), a positioning rod (106), a guide rod (107), a lifting plate (108), a lifting frame (109), a sleeve (1010), a conductive rod (1011), a buffer spring (1012), a detection component, and a power component. The positioning rod (106) is connected to the rear top of the worktable (104). The detection component is located on the right side of the worktable (104). Guide rods (107) are fixed on both sides inside the worktable (104). The lifting plate (108) is slidably connected between two guide rods (107). The lifting frame (109) is fixed to the rear side of the upper surface of the lifting plate (108). Three sleeves (1010) are fixed at intervals on the upper side of the lifting frame (109). A conductive rod (1011) is slidably installed in each sleeve (1010). The conductive rod (1011) consists of a rod body and a conductive contact fixed to the top of the rod body. The three terminals on the circuit breaker (105) correspond one-to-one. Buffer springs (1012) are provided between the lower end of the conductive rod (1011) and the wall of the lifting frame (109). The workbench (104) is equipped with a power assembly. The testing assembly includes a withstand voltage control console (1), a low-voltage control cable (101), a test transformer (102), and a high-voltage test cable (103). The withstand voltage control console (1) is located on the right side of the workbench (104). The test transformer (102) is arranged adjacent to the withstand voltage control console (1). The withstand voltage control console (1) is electrically connected to the test transformer (102) through multiple low-voltage control cables (101). Several high-voltage test cables (103) are led out from the test transformer (102). A high-voltage test clip is provided at the end of the high-voltage test cable (103). The high-voltage test clip can be clamped on the conductive contact of the conductive rod (1011).The power assembly includes a steering gear (201), a rotating shaft (202), a lead screw (203), and a dual-axis motor (204). Four steering gears (201) are arranged in a rectangular pattern at the bottom of the worktable (104). Each steering gear (201) is a bevel gear steering gear with three shaft interfaces. Two of these interfaces are horizontal with an included angle of 90 degrees, and the third interface faces upwards. A dual-axis motor (204) is installed on the right side of the bottom of the worktable (104), between the two right-side steering gears (201). The two horizontal shaft interfaces of adjacent steering gears (201) are connected by a rotating shaft (202). The two steering gears (201) on the output shaft of the machine (204) are connected to the corresponding output shafts of the dual-axis motor (204), i.e., there are three rotating shafts (202), located in the front-back direction and the left direction, respectively. The right side is directly connected to the two output shafts of the dual-axis motor (204). The top shaft interface of the steering gear (201) is poweredly connected to a lead screw (203). The top of the lead screw (203) passes through the top of the worktable (104) and is rotatably connected to it. The lead screw (203) also passes through the lifting plate (108) and is threadedly connected to the lifting plate (108). The dual-axis motor (204) is electrically connected to the pressure-resistant control console (1).

2. The vacuum circuit breaker withstand voltage testing device according to claim 1, characterized in that, The conductive contacts are made of copper-tungsten alloy and their mating surfaces are silver-plated.

3. The vacuum circuit breaker withstand voltage testing device according to claim 2, characterized in that, It also includes a slide rail (301), a moving block (302), a slide rod (303), a clamping block (304), a clamping spring (305), a push rod (306), a tripod (307), a fixed rod (308), and a tension spring (309). Slide rails (301) are fixed on both sides of the top of the worktable (104). Moving blocks (302) are slidably connected between the two slide rails (301) on both sides. Two slide rods (303) are slidably mounted on each moving block (302). A clamping block (304) is connected between the inner ends of the two slide rods (303) on the same moving block (302). A clamping spring (305) is sleeved on the outer side of each slide rod (303). 05) Both ends are connected to the outer wall of the clamping block (304) and the moving block (302) respectively. Push rods (306) are fixed on both sides of the lifting plate (108). Tripods (307) are connected to both sides of the bottom of the moving block (302). The push rods (306) on both sides form a slope contact relationship with the inclined sections of the two tripods (307) on the corresponding sides. Fixed rods (308) are symmetrically fixed on the outer side of the moving block (302). Fixed rods (308) are also fixed on both sides of the top of the worktable (104) at positions corresponding to the fixed rods (308) on the moving block (302). A tension spring (309) is connected between the two fixed rods (308) at corresponding positions on the same side.

4. A vacuum circuit breaker withstand voltage testing device according to claim 3, characterized in that, A buffer pad is fixedly provided on the side of the clamping block (304) that contacts the outer wall of the circuit breaker (105). The buffer pad is made of silicone rubber.

5. A vacuum circuit breaker withstand voltage testing device according to claim 4, characterized in that, It also includes a protective plate (401), a transmission rod (402), a clearance spring (403) and a rotating rod (404). The four outer walls of the worktable (104) are all connected to the protective plate (401) by hinges. The four corners of the lifting plate (108) are all connected to the transmission rod (402). The bottom end of each transmission rod (402) is rotatably connected to the rotating rod (404). The upper end of the rotating rod (404) is rotatably connected to the inner wall of the corresponding protective plate (401). The lower end of the rotating rod (404) is connected to the bottom of the lifting plate (108) by a clearance spring (403).

6. A vacuum circuit breaker withstand voltage testing device according to claim 5, characterized in that, It also includes a fixed frame (501), auxiliary wheels (502), a moving rod (503), a power terminal (504), a guide block (505), a rack (507), and a spur gear (508). Multiple fixed frames (501) are spaced apart on the front bottom of the worktable (104). The upper part of each fixed frame (501) is rotatably connected to an auxiliary wheel (502). The moving rod (503) slides between the fixed frames (501), and the top surface of the moving rod (503) rolls against the bottom surface of the auxiliary wheel (502). The bottom of the moving rod (503) is connected to a rack (507). The lower part of each fixed frame (501) is rotatably connected to a spur gear (508) via a rotating shaft. A spur gear (508) is also fixedly connected to the front output shaft of the dual-axis motor (204). The rack (507) meshes with all the spur gears (508). Multiple electrical terminals (504) are fixed at intervals on the right end of the moving rod (503). A guide block (505) is connected to the bottom right side of the workbench (104). The moving rod (503) and the rack (507) slide with the guide block (505). A notch (509) for avoiding the moving rod (503) is opened at the lower end of the right protective plate (401). A wire outlet groove (506) communicating with its inner cavity is opened on the top left side of the moving rod (503). A clearance groove (5010) is opened on the front side of the lifting plate (108) corresponding to the position of the moving rod (503). Multiple through holes (5011) are opened at intervals on the upper side of the lifting frame (109) near each conductive rod (1011).

Images