High-voltage device high-voltage AC withstand voltage test device and method using capacitive voltage divider

Abstract

The invention relates to a high-voltage alternating-current withstand voltage test device and method for high-voltage equipment adopting a capacitive voltage divider, and relates to the related field of withstand voltage test, the device comprises a test box and a partition plate fixed in the test box, the partition plate is provided with a test board, the device further comprises test equipment, the test equipment is fixed in the test box, and the test board is connected with the test box. Test wires electrically connected with the test equipment are fixed to the two sides of the test equipment correspondingly, communication assemblies connected with the test wires are installed at the ends, away from the test equipment, of the test wires correspondingly, two bearing pieces are fixed to the test table, and bearing rollers used for bearing test pieces are rotationally installed on the two bearing pieces; the partition plate is provided with a butt joint assembly used for driving the communicating piece to move relatively, the contact pieces make contact with pins of the test piece after the butt joint piece moves to the tail end of the stroke, and a circuit is connected through the communicating assembly when the two contact pieces and the bearing box move to the tail end of the stroke. The connection work can avoid the generation of electric arc when the electric power is cut off through the arc extinction piece, so as to avoid the problem that the test time is prolonged due to the electric arc.

Description

Technical Field

[0001] The present invention relates to the field related to withstand voltage testing, specifically a high-voltage AC withstand voltage test device and method for high-voltage equipment using a capacitive voltage divider. Background Art

[0002] The capacitive voltage divider has a greater withstand voltage strength than ordinary resistive voltage dividers and is not easily broken down. It is generally used to measure AC high voltages. However, since the response time value of its frequency response effect is larger than that of the resistive voltage divider, it is less used than the resistive voltage divider in the measurement of impulse voltages. For the measurement of extremely high impulse voltages, a capacitive-resistive voltage divider is often used. When conducting a high-voltage AC withstand voltage test, series resonance will be used, and a capacitive voltage divider will be used in the series resonance. After it resonates with the reactor, a high voltage will be generated, which can perform a high-voltage AC withstand voltage test on high-voltage equipment.

[0003] For the AC withstand voltage tests of various large power transformers, power cables, steam and hydro generators, and other capacitive equipment, during the test, the main components inside are usually tested to obtain their maximum withstand voltage capabilities, so as to facilitate the subsequent judgment of the equipment's performance.

[0004] In this regard, a high-voltage withstand voltage test device based on AC high voltage is disclosed, with the publication number: CN218158203U; During the withstand voltage test process, usually, the component to be subjected to the withstand voltage test is powered on with the test device to set a specified time. If no damage problem occurs to the test piece within the test time, the withstand voltage limit of the test piece is tested by gradually increasing the time; During the test, timing tests are required. When the circuit is disconnected, since it is a high-voltage test, an arc will be generated. The arc will extend the test time and may cause the problem that the current has not been disconnected after the circuit is disconnected due to the existence of the arc. However, the above-mentioned withstand voltage test device cannot solve this problem. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-voltage AC withstand voltage test device and method for high-voltage equipment using a capacitive voltage divider to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider includes a test box and a partition fixed inside the test box. A test bench is installed on the partition, and further includes: A test device, which is fixed inside the test box. Test lines electrically connected thereto are fixed on both sides of the test device. Connecting components connected thereto are installed at one ends of the two test lines far away from the test device; Two bearing members are fixed on the test bench, and receiving rollers for bearing the test pieces are rotatably mounted on the two bearing members. A docking assembly for driving the two connecting members to move relative to each other is mounted on the partition.

[0007] As a further solution of the present invention: the docking assembly includes a bidirectional screw rod rotatably installed in the test box, the bidirectional screw rod is sleeved with two threaded sleeves threadedly matched with the bidirectional screw rod, the two threaded sleeves connect the two connecting assemblies, the bottoms of the two threaded sleeves are fixed with limit plates, and the limit plates are slidably matched with the positioning grooves provided on the partition plate; A motor is fixed on the partition, and the output shaft of the motor is connected to the bidirectional screw rod through a transmission chain; A correcting piece is also installed on the bidirectional screw rod, and the correcting piece is connected to the positioning groove.

[0008] As a further solution of the present invention: the correction member includes a bracket fixed on the bearing member, a transmission rod is rotatably mounted on the bearing member bracket, a paddle for correction is fixed at the end of the transmission rod, a worm wheel is coaxially fixed on the transmission rod, and a worm gear cooperating with the worm wheel is rotatably mounted on the bearing member; The bidirectional lead screw is provided with a pre-triggering member connected with the worm.

[0009] As a further solution of the present invention: the pre-trigger comprises a sliding sleeve sleeved on the bidirectional screw rod, a limiting groove is provided in the sliding sleeve, the limiting groove is slidably matched with a limiting strip fixed on the bidirectional screw rod, and a No. 3 spring is also sleeved on the bidirectional screw rod; A rack plate is fixed to the bottom of the sliding sleeve, and the rack plate is meshed with a gear coaxially fixed to the worm; A push rod is fixed on one of the limit plates, and the push rod cooperates with the rack plate.

[0010] As a further solution of the present invention: a travel limit block is fixed on a bearing member located on a side away from the door of the test box.

[0011] As a further solution of the present invention: the communication component includes two oppositely arranged carrying boxes, the two carrying boxes are respectively fixed to two threaded sleeves, the opposite sides of the two carrying boxes are open, the opposite sides of the two carrying boxes are slidably mounted with sleeves, and the side of the sleeve away from the carrying boxes is fixed with a contact piece; The carrier box and the sleeve box are provided with a connection piece, and the test line and the contact piece are both connected to the connection piece; A plurality of No. 2 springs are also fixed between the carrying box and the sleeve box, one end of the No. 2 spring is fixed to the sleeve box and the other end is fixed to the carrying box.

[0012] As a further solution of the present invention: The connecting member includes a connecting rod fixed inside the carrying box. The connecting rod is fixed to and in electrical connection with the test wire. A connecting cylinder is fixed inside the contact member. The connecting cylinder is slidably engaged with the connecting rod and is in electrical connection with the contact member; Wherein, inclined surfaces are provided at opposite ends of the connecting rod and the connecting cylinder; An arc extinguishing member is installed on the connecting rod.

[0013] As a further solution of the present invention: The arc extinguishing member includes a pumping member fixed inside the carrying box. A piston is sealed and slidably installed inside the pumping member. A pushing rod is fixed to the side of the piston facing the sleeve box. The pushing rod is connected to the sleeve box; A connecting rod is fixed on the connecting rod. The connecting rod is connected to the pumping member through an output pipe communicating therewith. Moreover, the pumping member is also connected to a storage bottle fixed on the carrying box through another conveying pipe communicating therewith. One-way valves are fixed inside both conveying pipes.

[0014] As a further solution of the present invention: Two brackets are fixed on the partition board. A plurality of wire rollers for guiding and limiting the test wire are rotatably installed on the two brackets; Guide rods are fixed on both sides of the two brackets. Sliders are slidably installed on the two guide rods. A tensioning roller for pulling the test wire is rotatably installed between the two sliders. A first spring is sleeved on the guide rod; One end of the test wire away from the connecting rod is fixed through a fixing member.

[0015] A high-voltage AC withstand voltage test method for a high-voltage device using a capacitive voltage divider, using the high-voltage AC withstand voltage test device for a high-voltage device using a capacitive voltage divider as described above, includes the following steps: Step 1, open the door of the test box, then place the test piece on the two receiving rollers, and finally close the door of the test box; Step 2, complete the connection action between the connecting component and the test piece through the docking component to avoid the danger to the tester in the high-voltage working environment; Step 3, complete the electrical connection of the test piece through the connecting component, and avoid the generation of electric arcs through the arc extinguishing component, thereby avoiding the problem of prolonging the test time due to electric arcs.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The present invention supports the test piece through two receiving rollers and drives the rotation of the test piece. By driving the rotation of the test piece and cooperating with the airflow generated by the fan, moisture, stains, etc. on the test piece are cleaned to avoid affecting the test; Then, the docking component is used to drive the two carrier boxes to move relative to each other to achieve the electrical connection between the circuit and the test piece. Before the electrical connection, the test piece is corrected by the correction component so that the contact piece contacts the pin of the test piece after the docking piece moves to the end of the stroke. When the two contact pieces and the carrier box move to the end of the stroke, the circuit is connected by the connection component. This connection work can avoid the generation of electric arcs when the power is cut off by the arc extinguishing component, so as to avoid the problem of extended test time caused by electric arcs.

[0017] Secondly, the structure of the present invention is relatively simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the overall high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider.

[0019] Figure 2 It is a schematic structural diagram inside the test box of the high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider.

[0020] Figure 3 It is Figure 2 It is a schematic structural diagram from another angle.

[0021] Figure 4 It is a schematic structural diagram on the partition of the high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider.

[0022] Figure 5 It is a schematic structural diagram of the guide roller of the high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider.

[0023] Figure 6 It is a schematic structural diagram of the docking component of the high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider.

[0024] Figure 7 It is Figure 6 The enlarged partial structural diagram at A in

[0025] Figure 8 It is a schematic structural diagram of the correction component of the high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider.

[0026] Figure 9 It is the correction schematic diagram of the dial plate of the high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider.

[0027] Figure 10 It is a schematic structural diagram of the connection component of the high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider.

[0028] Figure 11 It is Figure 10A magnified view of the local structure at point B in the middle.

[0029] Figure 12 It is a schematic diagram of the structure of the injection part in the high-voltage AC withstand voltage test device of high-voltage equipment using a capacitive voltage divider.

[0030] Figure 13 for Figure 12 Enlarged view of point C in the middle.

[0031] In the figure: 1. test box; 101. partition; 102. test bench; 2. fan; 3. test equipment; 301. test line; 302. fixing piece; 303. bracket; 304. wire roller; 305. guide rod; 306. spring No. 1; 307. slider; 308. tension roller; 4. bidirectional screw rod; 401. threaded sleeve; 402. limit plate; 403. motor; 404. transmission chain; 405. positioning groove; 406. bearing box; 407. connecting rod; 408. sleeve box; 409 , contact piece; 4010, connecting tube; 4011, No. 2 spring; 4012, pumping piece; 4013, pushing rod; 4014, ejection piece; 4015, push rod; 5, receiving roller; 501, bearing piece; 502, travel limit block; 503, transmission rod; 504, dial plate; 505, worm wheel; 506, worm; 507, gear; 508, rack plate; 509, reinforcement rod; 5010, sliding sleeve; 5011, No. 3 spring; 5012, limit strip; 5013, limit groove. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0034] For example, see Figures 1 to 13 A high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider includes a test box 1 and a partition 101 fixed in the test box 1, a test bench 102 is installed on the partition 101, and also includes: The test device 3 fixed inside the test chamber 1 has test lines 301 electrically connected to both sides thereof, and a connection component is installed at one end of each of the two test lines 301 away from the test device 3; Two bearing members 501 are fixed on the test bench 102, and a receiving roller 5 for bearing the test piece is rotatably installed on the two bearing members 501. A docking component for driving the two connection components to move relative to each other is installed on the partition 101.

[0035] In the embodiment of the present invention, a blower 2 is provided inside the test chamber 1, and an air flow is generated when the blower 2 operates; When performing the test work, first open the door of the test chamber 1, then place the "test piece" on the two receiving rollers 5, and then close the door of the test chamber 1; Then, drive one of the receiving rollers 5 to rotate by a driving motor installed inside the test chamber 1, so as to rotate the test piece, and remove moisture, dust and substances affecting the test on the test piece through the air flow generated by the blower 2; A plurality of through holes are provided on the test bench 102 to facilitate the flow of the air flow; Drive the two connection components to move relative to each other through the docking component, so that the docking component is electrically connected to the test piece, and the test work on the test piece is realized through the electrical connection between the connection component and the test piece. Since the test is carried out in a high-voltage scenario, this power connection work is an extremely dangerous step. In the present invention, the power connection work is realized by relevant components to replace manual work after the door of the test chamber 1 is closed, and its safety has been qualitatively improved; Secondly, pre-treat the test piece through the rotation of the receiving roller 5 and the air flow generated by the blower 2 to avoid the problem of virtual connection and damage to the test piece during power connection.

[0036] The docking component includes a bidirectional lead screw 4 rotatably installed inside the test chamber 1. Two threaded sleeves 401 threadedly engaged with the bidirectional lead screw 4 are sleeved on the bidirectional lead screw 4. The two threaded sleeves 401 are connected to the two connection components. A limiting plate 402 is fixed at the bottom of each of the two threaded sleeves 401, and the limiting plate 402 is slidably engaged with a positioning groove 405 provided on the partition 101; A motor 403 is fixed on the partition 101, and the output shaft of the motor 403 is connected to the bidirectional lead screw 4 through a transmission chain 404; A correction member is also installed on the bidirectional lead screw 4, and the correction member is connected to the positioning groove 405.

[0037] In an embodiment of the present invention, when the motor 403 operates, its output shaft drives the bidirectional lead screw 4 through the transmission chain 404. When the bidirectional lead screw 4 rotates, it drives the two threaded sleeves 401 to move relative to each other through the threaded engagement with the two threaded sleeves 401. When the two threaded sleeves 401 move relative to each other, they drive the two connecting components to move relative to each other; Of course, by driving the bidirectional lead screw 4 to rotate in the reverse direction by the motor 403, the two threaded sleeves 401 are driven to move in the opposite direction by the reverse rotation of the bidirectional lead screw 4 and the threaded sleeve 401; Among them, the sliding fit between the limiting plate 402 and the positioning groove 405 provides a limit for the threaded sleeve 401 to prevent the threaded sleeve 401 from not being limited when the threaded sleeve 401 rotates, so that there is no threaded transmission between the threaded sleeve 401 and the bidirectional lead screw 4; The relative movement of the two threaded sleeves 401 corresponds to the relative movement of the two connecting components, that is, the power-on operation.

[0038] The correction member includes a bracket fixed to the carrier 501. A transmission rod 503 is rotatably installed on the bracket of the carrier 501. A dial 504 for correction is fixed to the end of the transmission rod 503. A worm gear 505 is also coaxially fixed on the transmission rod 503. A worm 506 engaged with the worm gear 505 is rotatably installed on the carrier 501; A pre-triggering member is installed on the bidirectional lead screw 4 to connect the worm 506.

[0039] In an embodiment of the present invention, when the bidirectional lead screw 4 rotates to drive the two threaded sleeves 401 to move relative to each other, it corresponds to driving the connecting component to dock with the test piece. Before the docking operation is connected, the movement of the threaded sleeve 401 drives the pre-triggering component to drive the worm 506 to rotate; When the worm 506 rotates, it drives the transmission rod 503 to rotate through the cooperation with the worm gear 505, so as to drive the dial 504 to flip through the rotation of the transmission rod 503, and correct the test piece through the flipping of the dial 504; Among them, the two dials 504 can be set to be symmetrical, and the structure for driving the dials 504 to flip remains unchanged. Two meshing gears are rotatably installed between the two worms 506. The rotating shafts of the two gears are respectively connected to the two worms 506 through synchronous belts, so that the two rotate relative to each other, and correspondingly drive the two dials 504 to flip in the opposite direction; Please refer to FIG. @. When the dial 504 flips, it contacts the pins of the test piece. The flipping of one of the dials 504 drives the test piece to rotate. When the dial 504 flips to the horizontal state, the two pins of the test piece are also in the horizontal state, so as to facilitate the connection between the connecting component and the connection.

[0040] The pre-triggering member includes a sliding sleeve 5010 sleeved on the bidirectional lead screw 4. A limiting groove 5013 is formed in the sliding sleeve 5010, and the limiting groove 5013 is in sliding fit with a limiting strip 5012 fixed on the bidirectional lead screw 4. A third spring 5011 is also sleeved on the bidirectional lead screw 4; A rack plate 508 is fixed to the bottom of the sliding sleeve 5010, and the rack plate 508 meshes with a gear 507 coaxially fixed on the worm 506; A push rod 4015 is fixed to one of the limiting plates 402, and the push rod 4015 cooperates with the rack plate 508.

[0041] In the embodiment of the present invention, when the threaded sleeve 401 moves, it drives the limiting plate 402 to move, so as to drive the push rod 4015 to move towards the sliding sleeve 5010 through the limiting plate 402; When the push rod 4015 moves towards the sliding sleeve 5010 until it contacts the rack plate 508, the push rod 4015 continues to move to push the rack plate 508 and the sliding sleeve 5010 to move synchronously. When the sliding sleeve 5010 moves synchronously, the third spring 5011 is compressed, so that the third spring 5011 stores elastic potential energy. When the rack plate 508 moves, it drives the gear 507 and the worm 506 to rotate through meshing with the gear 507; Among them, the way of pushing the rack plate 508 after the push rod 4015 abuts against the rack plate 508 can drive the worm 506 to rotate before the connecting component contacts the pins of the test piece, so as to complete the adjustment of the test piece when the connecting component moves to the end of the stroke; Secondly, after the test is completed, when the threaded sleeve 401 and the limiting plate 402 move in the reverse direction, they drive the push rod 4015 to move in the reverse direction, so that the thrust received by the third spring 5011 disappears, and then the elastic potential energy of the third spring 5011 is released to reset the sliding sleeve 5010 and the rack plate 508. Then, the worm 506 is driven to rotate in the reverse direction through the gear 507, so as to drive the dial 504 to flip back to the initial position, so that the function of adjusting the test piece of the present invention can work continuously, and this adjustment process is completed automatically, eliminating the occurrence of danger; It should be noted that a reinforcing rod 509 slidably engaged with the rack plate 508 is also fixed on the bracket, and the rack plate 508 is supported and limited by the reinforcing rod 509; The limiting groove 5013 and the limiting strip 5012 in the present invention also play a role of guiding and limiting, so that the sliding sleeve 5010 will not rotate when moving.

[0042] A stroke limiting block 502 is fixed to a bearing member 501 on the side of the test box 1 away from the box door.

[0043] In an embodiment of the present invention, the travel of the test piece can be limited by the travel limit block 502 so that the position of the test piece on the two receiving rollers 5 is the optimal position.

[0044] The connecting component includes two relatively arranged bearing boxes 406. The two bearing boxes 406 are respectively fixed to the two threaded sleeves 401. One side of the two bearing boxes 406 facing each other is open. A sleeve box 408 is slidably installed on one side of the two bearing boxes 406 facing each other. A contact piece 409 is fixed on the side of the sleeve box 408 away from the bearing box 406. A connecting piece is installed in the bearing box 406 and the sleeve box 408. The test wire 301 and the contact piece 409 are both connected to the connecting piece. A plurality of second springs 4011 are also fixed between the bearing box 406 and the sleeve box 408. One end of the second spring 4011 is fixed to the sleeve box 408, and the other end is fixed to the bearing box 406.

[0045] In an embodiment of the present invention, when the two threaded sleeves 401 move relative to each other, they drive the two bearing boxes 406 to move relative to each other, so as to drive the sleeve box 408 and the contact piece 409 to move synchronously through the second spring 4011. When the contact piece 409 moves to contact the pin of the test piece, the movement stops. The two contact pieces 409 are limited by the pins of the test piece, so that when the two bearing boxes 406 move relative to each other, the contact piece 409 and the sleeve box 408 are limited, and then when the bearing box 406 continues to move, the sleeve box 408 and the bearing box 406 move relative to each other to compress the second spring 4011 and store elastic potential energy in the second spring 4011. Wherein, when the sleeve box 408 and the bearing box 406 move relative to each other, the connecting piece works to connect the circuit of the test wire 301 and the pin of the test piece.

[0046] The connecting piece includes a connecting rod 407 fixed in the bearing box 406. The connecting rod 407 is fixed to the test wire 301 and is in electrical connection with it. A connecting cylinder 4010 is fixed in the contact piece 409. The connecting cylinder 4010 is slidably matched with the connecting rod 407, and the connecting cylinder 4010 is in electrical connection with the contact piece 409. Wherein, inclined surfaces are arranged at opposite ends of the connecting rod 407 and the connecting cylinder 4010. An arc extinguishing piece is installed on the connecting rod 407.

[0047] In an embodiment of the present invention, after the contact piece 409 and the sleeve box 408 are limited in contact with the test piece, the bearing box 406 continues to move, so that the connecting rod 407 is inserted into the connecting cylinder 4010, and the circuit of the test wire 301 and the contact piece 409 is connected by inserting the connecting rod 407 into the connecting cylinder 4010. Through the cooperation of the connecting rod 407 and the connecting cylinder 4010, the electric arcs generated when the two are separated are both within the bearing box 406, so as to avoid the electric arcs affecting other components; Moreover, the electric arcs generated when the connecting rod 407 and the connecting cylinder 4010 are separated are subjected to arc extinguishing treatment by an arc extinguishing component.

[0048] The arc extinguishing component includes a pumping component 4012 fixed within the bearing box 406. A piston is hermetically and slidably installed within the pumping component 4012. A pushing rod 4013 is fixed on the side of the piston facing the sleeve box 408, and the pushing rod 4013 is connected to the sleeve box 408; A connecting rod 407 is fixed on the connecting rod 407. The connecting rod 407 is communicated with the pumping component 4012 through an output pipe communicated therewith. Moreover, the pumping component 4012 is also communicated with a storage bottle fixed on the bearing box 406 through another conveying pipe. One-way valves are fixed within both conveying pipes.

[0049] In an embodiment of the present invention, when the connecting rod 407 and the connecting cylinder 4010 are connected, relative movement occurs between the two, so as to drive the pushing rod 4013 to move through the relative movement of the two, and further push the piston to move, so as to convey the sulfur hexafluoride gas within the pumping component 4012 to the spraying component 4014 through the conveying pipe, and spray it to the connection part of the connecting rod 407 and the connecting cylinder 4010 through the spraying component 4014, so as to control the electric arc generated when the connecting rod 407 and the connecting cylinder 4010 are separated, so as to avoid the extension of the energization time due to the electric arc after the connecting rod 407 and the connecting cylinder 4010 are separated; Wherein, when releasing the elastic potential energy of the second spring 4011, the pushing rod 4013 is driven to move through the sleeve box 408, so as to generate negative pressure within the pumping component 4012 through the movement of the piston, so that the sulfur hexafluoride gas within the storage bottle is conveyed to the pumping component 4012 through the other conveying pipe, so as to supplement the sulfur hexafluoride gas to the pumping component 4012.

[0050] Two brackets 303 are fixed on the partition plate 101. A plurality of wire rollers 304 for guiding and limiting the test wire 301 are rotatably installed on the two brackets 303; Guide rods 305 are fixed on both sides of the two brackets 303. Sliders 307 are slidably installed on both guide rods 305. A tensioning roller 308 for pulling the test wire 301 is rotatably installed between the two sliders 307. A first spring 306 is sleeved on the guide rod 305; One end of the test wire 301 away from the connecting rod 407 is fixed through a fixing member 302.

[0051] In the embodiment of the present invention, when the two carrying boxes 406 move relative to each other, the two test wires 301 are pulled to move relative to one end of the fixing member 302, so as to drive the slider 307 and the tensioning roller 308 to move under the guiding and limiting of the wire roller 304, and at the same time compress the first spring 306. This process is the wire releasing process; When the two carrying boxes 406 move in opposite directions, the elastic potential energy of the first spring 306 is released to drive the slider 307 and the tensioning roller 308 to move in the opposite direction, so as to pull the test wire 301 to make it taut. The function of this embodiment is to keep the test wire 301 always in a taut state, and realize wire releasing and wire winding when the two first springs 306 move.

[0052] To sum up, the present invention supports the test piece through the two receiving rollers 5 and drives the rotation of the test piece. By driving the rotation of the test piece and cooperating with the airflow generated by the fan 2, the moisture, stains, etc. on the test piece are cleaned to avoid affecting the test; Then, the docking component is used to drive the two carrying boxes 406 to move relative to each other to achieve the circuit connection between the circuit and the test piece. Before the circuit connection, the test piece is corrected by the correcting component so that the contact member 409 contacts the pins of the test piece after the docking member moves to the end of the stroke; When the two contact members 409 and the carrying boxes 406 move to the end of the stroke, the circuit is connected through the connecting component. This connection work can avoid the generation of electric arcs when the power is cut off by the arc extinguishing component, so as to avoid the problem of extended test time caused by electric arcs.

[0053] Secondly, the structure of the present invention is relatively simple and the cost is low.

[0054] For the high-voltage AC withstand voltage test method of a high-voltage device using a capacitive voltage divider, using the high-voltage AC withstand voltage test device of the high-voltage device using a capacitive voltage divider, the following steps are included: Step 1, open the door of the test box 1, then place the test piece on the two receiving rollers 5, and finally close the door of the test box 1; Step 2, complete the connection action between the connecting component and the test piece through the docking component to avoid the danger to the tester in the high-voltage working environment; Step 3, complete the circuit connection of the test piece through the connecting component, and avoid the generation of electric arcs through the arc extinguishing component, thereby avoiding the problem of extended test time caused by electric arcs.

[0055] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0056] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider, comprising a test box (1) and a partition plate (101) fixed inside the test box (1). A test bench (102) is installed on the partition plate (101), and it is characterized in that, Also includes: A test device (3), the test device (3) being fixed in the test box (1), test wires (301) electrically connected to the test device (3) being fixed on both sides of the test device (3), and a connection component connected to the two test wires (301) being installed at one end away from the test device (3); Two bearing members (501) are fixed on the test bench (102), receiving rollers (5) for bearing the test piece are rotatably mounted on the two bearing members (501), and a docking assembly for driving the two connecting members to move relative to each other is mounted on the partition plate (101).

2. The high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider according to claim 1, characterized in that, The docking assembly comprises a bidirectional screw (4) rotatably mounted in the test box (1), the bidirectional screw (4) being sleeved with two threaded sleeves (401) threadedly matched therewith, the two threaded sleeves (401) connecting the two connecting assemblies, the bottoms of the two threaded sleeves (401) being fixed with limiting plates (402), the limiting plates (402) being slidably matched with positioning grooves (405) provided on the partition (101); A motor (403) is fixed on the partition (101), and an output shaft of the motor (403) is connected to a bidirectional screw rod (4) via a transmission chain (404); A correcting piece is also mounted on the bidirectional screw rod (4), and the correcting piece is connected to the positioning groove (405).

3. The high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider according to claim 2, characterized in that, The correction member comprises a bracket fixed on a bearing member (501), a transmission rod (503) is rotatably mounted on the bracket of the bearing member (501), a dial plate (504) for correction is fixed to the end of the transmission rod (503), a worm wheel (505) is coaxially fixed to the transmission rod (503), and a worm (506) cooperating with the worm wheel (505) is rotatably mounted on the bearing member (501); A pre-triggering component is mounted on the bidirectional lead screw (4) and is connected to the worm (506).

4. The high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider according to claim 3, characterized in that, The pre-triggering member comprises a sliding sleeve (5010) sleeved on the bidirectional screw rod (4), a limiting groove (5013) being provided in the sliding sleeve (5010), the limiting groove (5013) being slidably matched with a limiting strip (5012) fixed on the bidirectional screw rod (4), and a No. 3 spring (5011) being sleeved on the bidirectional screw rod (4); A rack plate (508) is fixed to the bottom of the sliding sleeve (5010), and the rack plate (508) is meshed with a gear (507) coaxially fixed to the worm (506); A push rod (4015) is fixed on one of the limit plates (402), and the push rod (4015) cooperates with the rack plate (508).

5. The high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider according to claim 4, characterized in that, A travel limit block (502) is fixed on a bearing member (501) located on a side away from the door of the test box (1).

6. The high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider according to claim 5, characterized in that, The communication component comprises two oppositely arranged carrying boxes (406), the two carrying boxes (406) are respectively fixed to two threaded sleeves (401), the opposite sides of the two carrying boxes (406) are open, the opposite sides of the two carrying boxes (406) are both slidably mounted with sleeve boxes (408), and the side of the sleeve boxes (408) away from the carrying boxes (406) is fixed with a contact piece (409); A connecting piece is installed inside the carrying box (406) and the sleeve box (408), and both the test wire (301) and the contact piece (409) are connected to the connecting piece; A plurality of second springs (4011) are also fixed between the carrying box (406) and the sleeve box (408). One end of the second spring (4011) is fixed to the sleeve box (408), and the other end is fixed to the carrying box (406).

7. The high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider according to claim 6, characterized in that, The connecting member includes a connecting rod (407) fixed inside the carrying box (406). The connecting rod (407) is fixed to the test wire (301) and is in electrical connection therewith. A connecting cylinder (4010) is fixed inside the contact piece (409). The connecting cylinder (4010) is in sliding fit with the connecting rod (407), and the connecting cylinder (4010) is in electrical connection with the contact piece (409); Wherein, inclined surfaces are arranged at opposite ends of the connecting rod (407) and the connecting cylinder (4010); An arc extinguishing member is installed on the connecting rod (407).

8. The high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider according to claim 7, characterized in that, The arc extinguishing member includes a pumping member (4012) fixed inside the carrying box (406). A piston is hermetically and slidably installed inside the pumping member (4012). A push rod (4013) is fixed to the side of the piston facing the sleeve box (408), and the push rod (4013) is connected to the sleeve box (408); A connecting rod (407) is fixed on the connecting rod (407). The connecting rod (407) is communicated with the pumping member (4012) through an output pipe communicated therewith, and the pumping member (4012) is also communicated with a storage bottle fixed on the carrying box (406) through another conveying pipe communicated therewith. One-way valves are fixed inside both conveying pipes.

9. The high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider according to claim 1, characterized in that, Two brackets (303) are fixed on the partition plate (101). A plurality of wire rollers (304) for guiding and limiting the test wire (301) are rotatably installed on the two brackets (303); Guide rods (305) are fixed on both sides of the two brackets (303). Sliders (307) are slidably installed on the two guide rods (305). A tensioning roller (308) for pulling the test wire (301) is rotatably installed between the two sliders (307). A first spring (306) is sleeved on the guide rod (305); One end of the test wire (301) far from the connecting rod (407) is fixed through a fixing member (302).

10. A high-voltage AC withstand voltage test method for high-voltage equipment using a capacitive voltage divider, using the high-voltage AC withstand voltage test device for high-voltage equipment using a capacitive voltage divider according to any one of claims 1 to 9, characterized in that, Including the following steps: Step 1, open the door of the test box (1), then place the test piece on the two receiving rollers (5), and finally close the door of the test box (1); Step 2, complete the connection action between the connecting component and the test piece through the docking component to avoid the danger to the tester in the high-voltage working environment; Step 3, complete the electrical connection of the test piece through the connecting component, and avoid the generation of electric arcs through the arc extinguishing component, thereby avoiding the problem of prolonging the test time due to electric arcs.

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