Lightning test system for switch cabinet

Abstract

The application discloses a lightning test system for a switch cabinet, and belongs to the technical field of switch cabinets. The lightning test system for the switch cabinet comprises an impulse voltage generator, a support frame and a grounding rod, and further comprises: the support frame is located at the side of the impulse voltage generator, the top of the impulse voltage generator is a loop, the top of the support frame is fixedly provided with a fixing box, the top of the fixing box is provided with a movement groove, the grounding rod is movably arranged in the movement groove, and the side wall of the grounding rod is connected with a grounding wire. The application sets the grounding rod and the rotating mechanism for controlling the grounding rod on the two sides of the impulse voltage generator, so that the impulse voltage generator can be automatically and safely discharged after the test is completed. In addition, the back plate, the protective cover and the protection mechanism are arranged on the side wall of the support frame, so that the grounding wire can be safely stored while being safely discharged, thereby further ensuring the safety of the staff.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of switch cabinets, and particularly relates to a lightning test system for a switch cabinet. BACKGROUND

[0002] A switch cabinet is a kind of metal-enclosed cabinet which integrates circuit breakers, disconnectors, load switches, fuses, transformers, protective devices, measuring instruments, busbars and other auxiliary devices, and therefore its main functions are control, protection and isolation. In addition to the switch cabinets placed indoors, some switch cabinets need to be placed outdoors, and therefore these outdoor switch cabinets must face lightning tests before leaving the factory. A common system for testing the atmospheric overvoltage insulation performance of power equipment is an impulse voltage generator.

[0003] The impulse voltage generator needs to go through five stages during work. In the first stage, the switch cabinet and the generator are connected together, and then the waveform is set according to the requirements, the front resistance and the tail resistance are adjusted, the staff adjusts the ball gap, and finally the staff performs a safety check, so as to enter the charging stage. In the charging stage, after the staff starts the DC source, the current slowly charges the main capacitors at all levels. The whole process needs to last for several seconds to tens of seconds. At this time, all the ball gaps are kept open. At this time, the discharge stage can be entered. The staff controls the system to send a high-voltage pulse to the trigger electrode of the first-stage ball gap. The trigger pulse breaks the insulation state instantaneously, causing spark discharge, so as to become a wire. Under the domino effect, the breakdown process is transmitted at an extremely fast speed. All the ball gaps are fully broken and conducted, which is equivalent to switching all the originally parallel capacitors into a series state instantaneously, so as to form a high voltage at the top of the generator. Then the measurement stage and the reset stage can be entered.

[0004] In the final reset stage, although most of the energy is consumed on the resistance and the switch cabinet, in order to ensure the safety of the staff going to reset, the staff needs to use the grounding rod to forcibly ground the output end of the generator and all the capacitors to release all the residual charges. At present, this work is mostly manually performed by the staff. It is relatively convenient for the impulse voltage generator with a low height, but it is relatively difficult for some high impulse voltage generators. In addition, the staff is also relatively dangerous when manually working. At the same time, due to the high height of the impulse voltage generator, the output end at the top is also high, so the length of the grounding wire connected with the grounding rod also needs to be relatively long. The grounding wire with such a long length also poses a certain safety threat to the surrounding staff. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a lightning test system for a switch cabinet.

[0006] The technical solution adopted to solve the above technical problems is:

[0007] The lightning test system for the switch cabinet comprises an impulse voltage generator, a support frame and a grounding rod, and further comprises:

[0008] The support frame is located on one side of the impulse voltage generator, the top of the impulse voltage generator is a loop, a fixed box is fixedly arranged at the top of the support frame, a movement groove is formed in the top of the fixed box, the grounding rod is movably arranged in the movement groove, a grounding wire is connected to the side wall of the grounding rod, a grounding clamp is fixedly arranged at the other end of the grounding wire, and the grounding rod is located obliquely above the loop.

[0009] A working cavity is formed in the side wall of the fixed box, a servo motor is fixedly arranged in the working cavity, a rotating mechanism for rotating the grounding rod is fixedly arranged at the output end of the servo motor, a back plate is fixedly arranged on the side wall of the support frame, the back plate is rotatably connected with a protective cover, the grounding wire is located inside the protective cover, a movement rod is fixedly arranged at the top of the protective cover, a movement cavity is formed in the inside of the side of the fixed box facing the grounding wire, and a protection mechanism for controlling the protective cover is arranged in the movement cavity.

[0010] Through the above technical solution, the grounding rod and the rotating mechanism for controlling the grounding rod are arranged on one side of the impulse voltage generator, so that the impulse voltage generator can be automatically discharged after the test is completed, and the back plate, the protective cover and the protection mechanism are arranged on the side wall of the support frame, so that the grounding wire can be safely stored while being discharged, thereby further ensuring the safety of the workers. The back plate and the protective cover are both made of insulating materials, and the length of the back plate is slightly smaller than the height of the support frame. Because the grounding wire needs to be vertically arranged from the side wall of the fixed box to the space between the protective cover and the back plate, a space is reserved between the protective cover, the back plate and the bottom of the fixed box to avoid excessive bending of the grounding wire. In addition, a groove for placing the grounding wire can be additionally arranged between the back plate and the protective cover to further ensure the stability of the grounding wire inside the protective cover and avoid shaking of the grounding wire inside the protective cover.

[0011] Further, the grounding rod comprises a rod head, an insulating rod and a rubber handle, the rod head is fixed at the top of the insulating rod, the rubber handle is fixed at the bottom of the insulating rod, the grounding wire is connected to the side wall of the rod head, and the rod head is located obliquely above the loop.

[0012] By the above technical scheme, when the circuit needs to be safely discharged, the rod head is in contact with the circuit, the electric charge in the circuit is guided to the ground through the grounding wire, and the insulating rod and the rubber handle are components of a common grounding rod. In the application, the most common grounding rod is used to reduce the cost of customization, so as to be more suitable for lightning test on the switch cabinet.

[0013] Further, the rotating mechanism comprises two first pulleys, two second pulleys, a middle rod, a receiving sleeve, a connecting rod, a rotating ring and an arc-shaped rod, one of the first pulleys is fixed at the output end of the servo motor, the middle rod is fixedly arranged between the two first pulleys, the receiving sleeve is fixedly arranged on the side wall of the middle rod, the grounding rod is placed in the receiving sleeve, the first pulley is in transmission with the second pulley, the connecting rod is fixedly arranged between the two second pulleys, the rotating ring is fixedly arranged on the side wall of the connecting rod, the arc-shaped rod is fixedly arranged on the side wall of the rotating ring, the side wall of the fixed box is provided with a movement hole, the arc-shaped rod passes through the movement hole, and the other end of the arc-shaped rod abuts against the side wall of the grounding rod.

[0014] By the above technical scheme, the rotation of the servo motor drives the rotation of the receiving sleeve on the side wall of the first pulley, and then the grounding rod is rotated, realizing the two purposes of safe discharge and far away from the circuit. At the same time, the rotation of the servo motor also drives the rotation of the arc-shaped rod, thereby supporting the grounding rod, and further ensuring the stability of the grounding rod when far away from the circuit.

[0015] Further, an insulating pad is fixedly arranged at one end of the arc-shaped rod away from the rotating ring, the top of the insulating pad is arc-shaped, and the arc-shaped end of the insulating pad abuts against the side wall of the grounding rod.

[0016] By the above technical scheme, the insulating pad directly contacts the insulating rod, which can ensure the direct supporting effect, and the same insulating material can further ensure the safety of the electrical appliances inside the fixed box. In addition, since the insulating rod is a round rod, the contact position between the insulating pad and the insulating rod is also designed to be arc-shaped in order to better fit the shape of the insulating rod.

[0017] Further, the rubber handle is located in the receiving sleeve, the receiving sleeve is designed to be open at the top, and the depth of the receiving sleeve is greater than half the length of the rubber handle.

[0018] By the above technical scheme, the rubber handle is placed inside the receiving sleeve. Since the receiving sleeve needs to drive the rotation of the rubber handle, and the overall length of the grounding rod is relatively long, in order to ensure the stability during the rotation process, the contact position between the rubber handle and the receiving sleeve needs to meet the torque of the rotation.

[0019] Further, the side wall of the rotating ring is also fixedly provided with a lever, the lever is also arc-shaped, and the lever is fixed on the side wall of the rotating ring away from the arc-shaped rod.

[0020] With the above technical solution, the lever is located at the other end of the rotating ring, and from... Figure 6 As can be seen, the inner wall of the lever faces in the opposite direction to the inner wall of the arc-shaped rod. Therefore, when the rotating ring rotates, the lever and the arc-shaped rod will drive the insulating pad and the upright plate to move in two different directions respectively.

[0021] Furthermore, the protection mechanism includes a vertical plate, a sliding plate, and several telescopic springs. The sliding plate is slidably connected to the bottom of the motion cavity, and the vertical plate is fixedly connected to the top of the sliding plate. The side wall of the vertical plate abuts against the side wall of the lever. The side wall of the sliding plate has a sliding hole, and the motion lever passes through the side wall of the motion cavity and the side wall of the sliding hole. Several telescopic springs are respectively fixedly arranged between the side wall of the sliding plate and the side wall of the motion cavity.

[0022] With the above technical solution, when the rotating ring is driven to rotate, the lever will push the upright plate to move, which in turn causes the moving rod to move by the translation hole. The setting of the telescopic spring allows the lever to remove the force on the upright plate and push the translation plate and the moving rod back to their original position. When the arc rod drives the insulating pad to rotate towards the circuit direction, the lever will drive the upright plate to move away from the circuit direction, causing the translation plate to compress the telescopic spring.

[0023] Furthermore, a sliding rod is fixedly provided at the bottom of the translation plate, and two sliding grooves are opened at the bottom of the motion cavity, with the two sliding rods slidably connected to the inner walls of the two sliding grooves respectively.

[0024] The above technical solution, with its sliding rod and sliding groove, makes the movement of the translation plate smoother and ensures that the translation plate moves along the prescribed route. While ensuring its movement trajectory, it also ensures that the translation plate can stably drive the moving rod to move along the route.

[0025] Furthermore, an arc-shaped hole is provided at the bottom of the motion cavity, through which the motion rod passes, and one end of the arc-shaped hole is on the same straight line as the back plate.

[0026] The arc-shaped hole, as described in the above technical solution, is designed to ensure that the moving rod can move along a predetermined path. Figure 7 As can be seen, the protective cover is semi-circular, so the movement trajectory of the moving rod fixed on the top of the protective cover is arc-shaped. The starting point of the arc-shaped hole needs to be on the same straight line as the back plate. This allows the protective cover to be completely fastened to the back plate, thereby providing complete protection for the grounding wire.

[0027] Further, the fixed box side wall is also provided with a display cavity, the display cavity and the working cavity are located at two sides of the movement groove respectively, a rotating rod is fixedly connected to a first pulley side wall away from the servo motor, a first gear is fixedly connected to the other end of the rotating rod, a center rod is rotatably connected to the inner wall of the display cavity, a second gear is fixedly connected to the side wall of the center rod, the second gear is engaged with the first gear, a display turntable is also fixedly connected to the side wall of the center rod, a warning block is fixedly arranged on the side wall of the display turntable, an observation window is formed in the side wall of the display cavity, and the observation window is opposite to the display turntable.

[0028] Through the above technical scheme, when the servo motor drives the grounding rod to discharge the circuit, the servo motor also drives the first pulley to rotate the first gear, and then the warning block on the display turntable is rotated to the position of the observation window, so as to visually warn the staff outside the discharge area, and further ensure the safety of the staff during the discharge process.

[0029] The beneficial effects of the present application are as follows:

[0030] (1) The present application sets a grounding rod on one side of the impulse voltage generator and a rotating mechanism for controlling the grounding rod, so that after the test is completed, the staff can safely discharge the circuit on the top of the impulse voltage generator by controlling the servo motor, and a back plate, a protective cover and a protection mechanism are arranged on the side wall of the support frame, so that the grounding wire is safely stored during the safe discharge, and the grounding wire during discharge is protected inside the protective cover, thereby further ensuring the safety of the staff during the discharge process.

[0031] (2) The present application sets an arc-shaped hole at the bottom of the movement cavity, wherein the arc-shaped hole is set to ensure that the movement rod can move along the specified route, Figure 7 As can be seen from Figure 8 , the protective cover is semi-circular, so the movement trajectory of the movement rod fixed on the top of the protective cover is arc-shaped, and the starting point of the arc-shaped hole needs to be on the same straight line as the back plate, so that the protective cover can be completely buckled on the back plate, thereby completely protecting the grounding wire, and the back plate and the protective cover are both made of insulating material, and the length of the back plate is slightly less than the height of the support frame, because the grounding wire needs to fall from the side wall of the fixed box to the space between the protective cover and the back plate, so in order to avoid excessive bending of the grounding wire, a part of space needs to be reserved between the protective cover, the back plate and the bottom of the fixed box.

[0032] (3) The application sets display turntable and warning block on the side wall of the fixed box, when the grounding rod discharges the circuit under the drive of the servo motor, the servo motor also drives the first gear to rotate, and then the warning block on the display turntable rotates to the observation window position, the warning block is set with bright color, so that the staff can easily see the test work outside the test area, and the staff can clearly know the discharge work, further ensure the work safety of the staff, and then intuitively warn the staff outside the discharge area. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is the overall structure schematic diagram of the application;

[0034] Figure 2 It is the structure connection schematic diagram of the support frame and the fixed box in the application;

[0035] Figure 3 It is the structure schematic diagram of the working cavity inside in the application;

[0036] Figure 4 It is the structure schematic diagram of the grounding rod in the application;

[0037] Figure 5 It is the structure schematic diagram of the side wall of the fixed box in the application;

[0038] Figure 6 It is the structure schematic diagram of the rotating mechanism in the application;

[0039] Figure 7 It is the structure schematic diagram of the protection mechanism in the application;

[0040] Figure 8 It is the structure schematic diagram of the bottom of the motion cavity in the application;

[0041] Figure 9 It is the structure schematic diagram of the inside of the display cavity in the application;

[0042] Figure 10 It is the sectional view of the side wall of the display cavity in the application.

[0043] Mark No. : 1, impact voltage generator; 2, support frame; 3, loop; 4, fixed box; 5, movement groove; 6, grounding wire; 7, grounding clamp; 8, servo motor; 9, working cavity; 10, back plate; 11, protective cover; 12, movement rod; 13, movement cavity; 14, rod head; 15, insulating rod; 16, rubber handle; 17, first pulley; 18, second pulley; 19, intermediate rod; 20, storage sleeve; 21, connecting rod; 22, rotating ring; 23, arc-shaped rod; 24, movement hole; 25, insulating pad; 26, push rod; 27, vertical plate; 28, translation plate; 29, extension spring; 30, translation hole; 31, sliding rod; 32, sliding groove; 33, arc-shaped hole; 34, display cavity; 35, rotating rod; 36, first gear; 37, center rod; 38, second gear; 39, display turntable; 40, warning block; 41, observation window. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0045] As shown in Figure 1 - Figure 2 The embodiment provides a lightning test system for switch cabinet, which comprises an impact voltage generator 1, a support frame 2 and a grounding rod, and further comprises: the support frame 2 is located on one side of the impact voltage generator 1, the top of the impact voltage generator 1 is provided with a loop 3, and the top of the support frame 2 is fixedly provided with a fixed box 4; the top of the fixed box 4 is provided with a movement groove 5, and the grounding rod is movably arranged in the movement groove 5; since the grounding rod needs to be in contact with the loop 3, the height of the support frame 2 needs to be slightly lower than the height of the impact voltage generator 1, and the rod head 14 of the grounding rod in the inclined state is inclined above the loop 3.

[0046] As can be seen from Figure 4 , the side wall of the grounding rod is connected with a grounding wire 6, the other end of the grounding wire 6 is fixedly provided with a grounding clamp 7, the grounding clamp 7 needs to be clamped on the grounding point specially arranged on the ground, thereby guiding the residual charge on the impact voltage generator 1 into the ground, the grounding rod is located obliquely above the loop 3, the grounding rod comprises a rod head 14, an insulating rod 15 and a rubber handle 16, the rod head 14 is fixed at the top of the insulating rod 15, the rubber handle 16 is fixed at the bottom of the insulating rod 15, the grounding wire 6 is connected to the side wall of the rod head 14, and the rod head 14 is located obliquely above the loop 3; when it is necessary to safely discharge the loop 3, the rod head 14 will be in contact with the loop 3, the charge in the loop 3 will be guided into the ground through the grounding wire 6, and the insulating rod 15 and the rubber handle 16 are both components of a common grounding rod; in the present application, the most common grounding rod is used in order to reduce the cost of customization, so that it is more suitable for lightning test on the switch cabinet.

[0047] By referring to Figure 3 , Figure 5 With Figure 6 , the side wall of the fixed box 4 is provided with a working cavity 9, and a servo motor 8 is fixedly arranged in the working cavity 9. The output end of the servo motor 8 is fixedly provided with a rotating mechanism for rotating the grounding rod. The rotating mechanism comprises two first pulleys 17, two second pulleys 18, a middle rod 19, a receiving sleeve 20, a connecting rod 21, a rotating ring 22 and an arc-shaped rod 23. One of the first pulleys 17 is fixed on the output end of the servo motor 8. The middle rod 19 is fixedly arranged between the two first pulleys 17. The receiving sleeve 20 is fixed on the side wall of the middle rod 19. The grounding rod is placed in the receiving sleeve 20. The rubber handle 16 is located in the receiving sleeve 20. The receiving sleeve 20 is designed with an open top. The depth of the receiving sleeve 20 is greater than half the length of the rubber handle 16. The rubber handle 16 is placed inside the receiving sleeve 20. Since the receiving sleeve 20 needs to drive the rubber handle 16 to rotate, and the overall length of the grounding rod is relatively long, in order to ensure the stability of the rotating process, the contact position of the rubber handle 16 and the receiving sleeve 20 needs to meet the torque of rotation.

[0048] The first pulley 17 is in belt transmission with the second pulley 18. The connecting rod 21 is fixedly arranged between the two second pulleys 18. The rotating ring 22 is fixedly arranged on the side wall of the connecting rod 21. The arc-shaped rod 23 is fixedly arranged on the side wall of the rotating ring 22. The side wall of the fixed box 4 is provided with a movement hole 24. The arc-shaped rod 23 passes through the movement hole 24. The other end of the arc-shaped rod 23 abuts against the side wall of the grounding rod. The end of the arc-shaped rod 23 away from the rotating ring 22 is fixedly provided with an insulating pad 25. Both the arc-shaped rod 23 and the insulating pad 25 are made of insulating material. The top of the insulating pad 25 is arc-shaped. The arc-shaped end of the insulating pad 25 abuts against the side wall of the grounding rod. The insulating pad 25 directly contacts the insulating rod 15, which can ensure the direct supporting effect, and the same insulating material can further ensure the safety of the electrical appliances inside the fixed box 4. Moreover, since the insulating rod 15 is a circular rod, in order to better fit the shape of the insulating rod 15, the contact position of the insulating pad 25 and the insulating rod 15 is also designed to be arc-shaped.

[0049] The side wall of the rotating ring 22 is also fixedly provided with a push rod 26. The push rod 26 is also arc-shaped. The push rod 26 is fixed on the side wall of the rotating ring 22 away from the arc-shaped rod 23. The push rod 26 is arranged at the other end of the rotating ring 22. As can be seen from Figure 6 , the inner wall of the push rod 26 faces in the opposite direction of the inner wall of the arc-shaped rod 23. Therefore, when the rotating ring 22 rotates, the push rod 26 and the arc-shaped rod 23 will drive the insulating pad 25 and the vertical plate 27 to move in two different directions respectively. When the arc-shaped rod 23 drives the insulating pad 25 to rotate towards the direction of the loop 3, the push rod 26 will drive the vertical plate 27 to move away from the direction of the loop 3, so that the translation plate 28 compresses the extension spring 29.

[0050] As Figure 7 - Figure 8 As shown in the drawings, the support frame 2 side wall is fixedly provided with a back plate 10, the back plate 10 side wall is rotatably connected with a protective cover 11, the grounding wire 6 is located inside the protective cover 11, the back plate 10 and the protective cover 11 are also both insulating materials, the length of the back plate 10 is slightly smaller than the height of the support frame 2, because the grounding wire 6 needs to fall from the side wall of the fixed box 4 to the space between the protective cover 11 and the back plate 10, therefore, in order to avoid excessive bending of the grounding wire 6, a part of space needs to be reserved between the protective cover 11, the back plate 10 and the bottom of the fixed box 4, at the same time, a groove for placing the grounding wire 6 can also be additionally arranged between the back plate 10 and the protective cover 11, further ensuring the stability of the grounding wire 6 inside the protective cover 11, avoiding the shaking of the grounding wire 6 inside the protective cover 11.

[0051] The protective cover 11 top is fixedly provided with a movement rod 12, the fixed box 4 side facing the grounding wire 6 is internally provided with a movement cavity 13, the movement cavity 13 is provided with a protection mechanism for controlling the protective cover 11, the protection mechanism includes a vertical plate 27, a translation plate 28 and a plurality of extension springs 29, the translation plate 28 is slidably connected with the bottom of the movement cavity 13, the translation plate 28 bottom is fixedly provided with a sliding rod 31, the bottom of the movement cavity 13 is provided with two sliding grooves 32, the two sliding rods 31 are respectively slidably connected with the inner walls of the two sliding grooves 32, the sliding rod 31 and the sliding groove 32 are arranged to make the movement of the translation plate 28 more smooth, and can ensure that the translation plate 28 moves along the specified route, ensuring its movement trajectory, and also ensuring that the translation plate 28 can stably drive the movement rod 12 to move along the route.

[0052] The vertical plate 27 is fixedly arranged on the top of the translation plate 28 and is fixedly connected, the vertical plate 27 side wall abuts against the side wall of the push rod 26, the translation plate 28 side wall is provided with a translation hole 30, the movement rod 12 penetrates through the side wall of the movement cavity 13 and the translation hole 30, when the rotating ring 22 is driven to rotate, the push rod 26 will push the vertical plate 27 to move, and then the movement rod 12 is driven to move by the translation hole 30, and the arrangement of the extension spring 29 can push the translation plate 28 and the movement rod 12 back to the original position after the push rod 26 removes the force on the vertical plate 27, the bottom of the movement cavity 13 is provided with an arc-shaped hole 33, the movement rod 12 penetrates through the arc-shaped hole 33, one end of the arc-shaped hole 33 is in the same straight line with the back plate 10, the arrangement of the arc-shaped hole 33 is to ensure that the movement rod 12 can move along the specified route, from Figure 7 With Figure 8 As can be seen from the drawings, the protective cover 11 is arranged in a semicircle, therefore, the movement trajectory of the movement rod 12 fixedly arranged on the top of the protective cover 11 is arc-shaped, the starting point of the arc-shaped hole 33 needs to be in the same straight line with the back plate 10, so that the protective cover 11 can be completely buckled on the back plate 10, and then the grounding wire 6 is completely protected.

[0053] A number of telescopic springs 29 are fixedly arranged between the side wall of the translation plate 28 and the side wall of the movement cavity 13, and the force applied by the telescopic springs 29 to the translation plate 28 can keep the sliding rod 31 at the end position of the sliding groove 32, at this time, the movement rod 12 inside the translation hole 30 is at the end of the arc-shaped hole 33, and the protective cover 11 is in the open state, facilitating the staff to adjust the position of the grounding wire 6.

[0054] In combination with reference Figure 9 With Figure 10 As shown, the side wall of the fixed box 4 is also provided with a display cavity 34, the display cavity 34 and the working cavity 9 are respectively located on both sides of the movement groove 5, a rotating rod 35 is fixedly connected to the side wall of a first pulley 17 away from the servo motor 8, the other end of the rotating rod 35 is fixedly connected with a first gear 36, a center rod 37 is rotatably connected to the inner wall of the display cavity 34, a second gear 38 is fixedly connected to the side wall of the center rod 37, the second gear 38 is engaged with the first gear 36, a display turntable 39 is also fixedly connected to the side wall of the center rod 37, warning blocks 40 are fixedly arranged on the side wall of the display turntable 39, bright colors are arranged in the warning blocks 40, so that the staff outside the test area can easily see the test work, and the staff can clearly know the progress of the discharge work, further ensuring the safety of the staff, an observation window 41 is arranged on the side wall of the display cavity 34, the observation window 41 is opposite to the display turntable 39, when the servo motor 8 drives the grounding rod to discharge the circuit 3, the servo motor 8 also drives the first pulley 17 to rotate the first gear 36, and then the warning blocks 40 on the display turntable 39 are rotated to the position of the observation window 41, so as to visually warn the staff outside the discharge area, further ensuring the safety of the staff during the discharge process.

[0055] The working principle of the embodiment is as follows: in the initial state, the rod head 14 of the grounding rod is above the circuit 3, the rod head 14 does not contact the circuit 3, the side wall of the insulating pad 25 abuts against the side wall of the insulating rod 15, at this time, the warning blocks 40 on the side wall of the display turntable 39 cannot be seen from the observation window 41, and at this time, the impulse voltage generator 1 has not started;

[0056] Before starting the lightning test of the switch cabinet by the impulse voltage generator 1, the servo motor 8 needs to be driven to rotate the first pulley 17, and the second pulley 18 driven by the first pulley 17 will rotate synchronously, so that the connecting rod 21 on the side wall of the second pulley 18 is driven to rotate, and the rotating ring 22 arranged on the side wall of the connecting rod 21 drives the arc-shaped rod 23 to rotate in the movement block, and the insulating pad 25 on the side wall of the arc-shaped rod 23 gradually leaves the insulating rod 15;

[0057] When the first pulley 17 rotates, the second pulley 18 will also rotate, and the middle rod 19 on the side wall of the first pulley 17 will also rotate, thus the receiving sleeve 20 on the side wall of the middle rod 19 will rotate, the rubber handle 16 in the receiving sleeve 20 will also rotate, thus the insulating rod 15 and the rod head 14 will move towards the loop 3, then the rod head 14 will contact the loop 3, the impulse voltage generator 1 will discharge, and the impulse voltage generator 1 will not store electric charge;

[0058] After the electric charge on the impulse voltage generator 1 is removed, the servo motor 8 will be reversely driven, the first pulley 17 will rotate reversely, thus the middle rod 19 and the receiving sleeve 20 will rotate reversely, the grounding rod will move away from the loop 3, the rod head 14 will move back to the upper side of the loop 3, then the switch cabinet to be tested will be placed in the testing area, and the impulse voltage generator 1 will be started to test the switch cabinet;

[0059] After the switch cabinet is tested, the servo motor 8 will be started again, the first pulley 17 will rotate, the second pulley 18 will also rotate, thus the connecting rod 21 on the side wall of the second pulley 18 will rotate, the rotating ring 22 on the side wall of the connecting rod 21 will rotate, the arc-shaped rod 23 will rotate in the moving block, the insulating pad 25 on the side wall of the arc-shaped rod 23 will gradually move away from the insulating rod 15, at this time, the insulating rod 15 will also rotate towards the loop 3 under the driving of the receiving sleeve 20, thus the rod head 14 will contact the loop 3 again, the residual electric charge on the loop 3 will flow to the ground through the grounding wire 6 and the grounding clamp 7, thus the electric charge on the impulse voltage generator 1 is removed, after a period of time, the worker can enter the working area and take out the tested switch cabinet, through the detection of the switch cabinet, the anti-electric effect of the switch cabinet can be known.

[0060] The above only describes the preferred embodiments of the present application, and is not used to limit the protection scope of the present application.

Claims

1. Lightning test system for switchgear cabinets, comprising an impulse voltage generator (1), a support frame (2) and a grounding rod, characterized in that, Also include: The support frame (2) is located on one side of the impulse voltage generator (1), the top of the impulse voltage generator (1) is a loop (3), the top of the support frame (2) is fixedly provided with a fixed box (4), the top of the fixed box (4) is provided with a movement groove (5), the grounding rod is movably arranged in the movement groove (5), the grounding rod side wall is connected with the grounding wire (6), the other end of the grounding wire (6) is fixedly provided with a grounding clamp (7), and the grounding rod is located obliquely above the loop (3); The grounding rod includes a rod head (14), an insulating rod (15) and a rubber handle (16), the rod head (14) is fixed at the top of the insulating rod (15), the rubber handle (16) is fixed at the bottom of the insulating rod (15), the grounding wire (6) is connected to the side wall of the rod head (14), and the rod head (14) is located obliquely above the loop (3); The side wall of the fixed box (4) is provided with a working cavity (9), the working cavity (9) is fixedly provided with a servo motor (8), the output end of the servo motor (8) is fixedly provided with a rotating mechanism for rotating the grounding rod, the rotating mechanism includes two first pulleys (17), two second pulleys (18), a middle rod (19), a storage sleeve (20), a connecting rod (21), a rotating ring (22) and an arc-shaped rod (23), one of the first pulleys (17) is fixed to the output end of the servo motor (8), the middle rod (19) is fixedly arranged between the two first pulleys (17), the storage sleeve (20) is fixedly arranged on the side wall of the middle rod (19), the grounding rod is placed in the storage sleeve (20), the first pulley (17) and the second pulley (18) are belt driven, the connecting rod (21) is fixedly arranged between the two second pulleys (18), the rotating ring (22) is fixedly arranged on the side wall of the connecting rod (21), the arc-shaped rod (23) is fixedly arranged on the side wall of the rotating ring (22), the side wall of the fixed box (4) is provided with a movement hole (24), the arc-shaped rod (23) passes through the movement hole (24), and the other end of the arc-shaped rod (23) abuts against the side wall of the grounding rod; The side wall of the rotating ring (22) is also fixedly provided with a lever (26), the lever (26) is also arc-shaped, and the lever (26) is fixed to the side wall of the rotating ring (22) away from the arc-shaped rod (23); The support frame (2) is provided with a back plate (10) on the side wall, the back plate (10) is rotatably connected with a protective cover (11), the grounding wire (6) is located in the protective cover (11), the protective cover (11) is fixedly provided with a moving rod (12) on the top, the fixed box (4) is internally provided with a moving cavity (13) on the side facing the grounding wire (6), the moving cavity (13) is provided with a protection mechanism for controlling the protective cover (11), the protection mechanism comprises a vertical plate (27), a translation plate (28) and a plurality of extension springs (29), the translation plate (28) is slidably connected with the bottom of the moving cavity (13), the vertical plate (27) is fixedly arranged on the top of the translation plate (28) and is fixedly connected, the side wall of the vertical plate (27) abuts against the side wall of the push rod (26), the side wall of the translation plate (28) is provided with a translation hole (30), the moving rod (12) penetrates through the side wall of the moving cavity (13) and the translation hole (30), and the extension springs (29) are fixedly arranged between the side wall of the translation plate (28) and the side wall of the moving cavity (13). The bottom of the translation plate (28) is fixedly provided with a sliding rod (31), and the bottom of the moving cavity (13) is provided with two sliding grooves (32); the sliding rod (31) is slidably connected with the inner wall of the sliding groove (32). The bottom of the moving cavity (13) is provided with an arc-shaped hole (33), the moving rod (12) penetrates through the arc-shaped hole (33), and one end of the arc-shaped hole (33) is in the same straight line as the back plate (10).

2. The lightning test system for switchgear according to claim 1, characterized in that, The arc-shaped rod (23) is fixedly provided with an insulating pad (25) away from the rotating ring (22), the top of the insulating pad (25) is arc-shaped, and the arc-shaped end of the insulating pad (25) abuts against the side wall of the grounding rod.

3. The lightning test system for switchgear according to claim 1, characterized by, The rubber handle (16) is located in the storage sleeve (20), the storage sleeve (20) is designed as an open top, and the depth of the storage sleeve (20) is greater than half the length of the rubber handle (16).

4. The lightning test system for switchgear according to claim 1, characterized by, The side wall of the fixed box (4) is also provided with a display cavity (34), the display cavity (34) and the working cavity (9) are located on the two sides of the moving groove (5), the side wall of a first pulley (17) away from the servo motor (8) is fixedly connected with a rotating rod (35), the other end of the rotating rod (35) is fixedly connected with a first gear (36), the inner wall of the display cavity (34) is rotatably connected with a center rod (37), the side wall of the center rod (37) is fixedly connected with a second gear (38), the second gear (38) is engaged with the first gear (36), the side wall of the center rod (37) is also fixedly connected with a display turntable (39), the side wall of the display turntable (39) is fixedly provided with a warning block (40), the side wall of the display cavity (34) is provided with an observation window (41), and the observation window (41) is opposite to the display turntable (39).

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