A transformer comprehensive test bench and test method thereof

Abstract

The invention provides a transformer comprehensive test bench and a test method thereof, belonging to the technical field of transformer testing. The transformer comprehensive test bench comprises an operating table and a control unit, and also comprises a switching mechanism, a de-energizing mechanism and a disconnecting mechanism. The invention provides the de-energizing mechanism, and when the transformer stops power supply testing, the control unit can control the corresponding electromagnet to be energized, and can push the corresponding first magnet member to move in a direction away from the electromagnet, and drive the corresponding second conductive member to move in a direction away from the conductive joint. During this process, the third conductive member will be inserted into the corresponding second conductive slot, and the second conductive member can be connected to the ground through the third conductive member, the fourth conductive member, the coil and the first conductive member, so that two switching joints at the output end and the input end of the power-off circuit can be connected to the ground, and the residual current can enter the earth, so as to eliminate the residual current, avoid the internal residual current of the transformer from affecting subsequent tests, and improve safety.

Description

Technical Field

[0001] The invention belongs to the technical field of transformer testing, and in particular relates to a transformer comprehensive testing platform and a testing method thereof. Background Art

[0002] The transformer needs to follow domestic and international standards and regulations during the design and manufacturing process to ensure the quality and safety performance of the equipment. The transformer needs to be comprehensively tested on the test bench to verify whether the transformer meets the specification requirements and ensure the performance and service life of the equipment.

[0003] A Chinese patent with application number CN201810537229.7 discloses a low-voltage withstand voltage test bench, including a test cabinet, four universal wheels are installed at the bottom of the test cabinet, the test cabinet has an integrally formed support back shell, a placement table and a receiving cavity shell, the support back shell is contracted backward in the width direction relative to the upper surface of the receiving cavity shell to form a receiving table surface for setting the placement table, a single-phase autocoupler voltage regulator is arranged inside the bottom end of the receiving cavity shell, the single-phase autocoupler voltage regulator has an adjustment handwheel and a limit switch, the adjustment handwheel is fixed on the placement table surface and is connected to the adjustment handwheel through a transmission rod that penetrates the placement table, the receiving table surface and the receiving cavity shell from top to bottom in sequence, an operation panel is arranged on the front of the support back shell, and a test terminal extends outward from the left side wall of the receiving cavity shell. The voltage withstand test bench of this invention is easy to control and observe, and can quickly test the abnormal voltage withstand conditions of the equipment under test. However, when this invention tests the transformer, since the current in the internal winding of the transformer is very small, the voltage drop caused by these unbalanced electromagnetic fields and distributed capacitance will dominate, resulting in uneven voltage distribution in the winding. When the test is stopped, residual current will be generated inside the transformer, which not only affects subsequent tests, but also poses a safety hazard.

[0004] Therefore, in order to solve the above problems, it is necessary to provide a transformer comprehensive test bench and a test method thereof. Summary of the invention

[0005] The purpose of the present invention is to provide a transformer comprehensive test bench and a test method thereof, aiming to solve the problem in the prior art that residual current is generated inside the transformer, affecting subsequent tests and posing a potential safety hazard.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A transformer comprehensive test bench, comprising an operating console and a control unit, and further comprising:

[0008] A switching mechanism, the switching mechanism comprising a switching box fixedly connected to both sides of the operating table, each of the switching boxes having a plurality of switching slots formed therein, a conductive joint electrically connected to the control unit being provided at the top of each switching slot, and a switching joint connected to the transformer wire being provided at the bottom of each switching slot, the conductive joint and the switching joint being used for connection testing of the transformer;

[0009] A de-energizing mechanism, the de-energizing mechanism comprising a first mounting groove provided on the outer wall of each adapter box, a first grounded conductive member being provided inside each of the first mounting grooves, a plurality of fixed plates being fixedly connected to the outer wall of each adapter box, the number of the fixed plates being the same as that of the adapter grooves and the positions being corresponding, a conductive component being provided on the top of each of the fixed plates, and a coil being connected to the first conductive member and the conductive component wires on the bottom of each of the fixed plates, for eliminating residual current of the transformer under test;

[0010] The disconnection mechanism includes a plurality of guide rings fixedly connected to the bottom of each adapter box, the number of the guide rings is the same as the adapter slots and the positions are corresponding, and the outer wall of each guide ring is provided with a disconnection component for disconnecting the adapter after the residual current is eliminated.

[0011] Preferably, each of the conductive joints is provided with a first conductive groove and an avoidance groove at one end close to the adapter, the avoidance groove is arranged above the first conductive groove and is interconnected, and each of the adapters is provided with a first accommodating groove at one end close to the conductive joint, and a second conductive member electrically connected to the corresponding adapter is slidably connected inside the first accommodating groove, a first elastic member is connected between the bottom of each second conductive member and the inner wall of the corresponding first accommodating groove, and a first limiting groove is provided on the top of each second conductive member.

[0012] Preferably, each of the adapter boxes is provided with sliding grooves on the outer wall, the number of which is the same as that of the adapter grooves and the positions of which are corresponding, each of the sliding grooves is connected to the corresponding adapter groove, the interior of each of the sliding grooves is slidably connected with an isolation plate, each of the isolation plates can move inside the corresponding avoidance groove, and the top outer wall of each of the adapter boxes is provided with electromagnets, the number of which is the same as that of the isolation plates and the positions of which are corresponding, each of the electromagnets is electrically connected to the control unit, and the top of each of the isolation plates is provided with a first magnet member, and when the electromagnet is energized to generate magnetic force, it can push the corresponding first magnet member to move in a direction away from the electromagnet, and can drive the corresponding isolation plate to move from the inside of the avoidance groove to the inside of the corresponding first limiting groove, and drive the corresponding second conductive member to move in a direction away from the conductive joint.

[0013] Preferably, the conductive component includes a connecting rod fixedly connected to the fixed plate, a second accommodating groove is provided inside the top of the connecting rod, a third conductive member is slidably connected inside the second accommodating groove, a second elastic member is connected between the bottom of the third conductive member and the inner wall of the second accommodating groove, a second mounting groove is provided at the bottom of each isolation plate, a fourth conductive member is provided inside the second mounting groove, a second conductive groove corresponding to the third conductive member is provided at the bottom of each fourth conductive member, and an iron core fixedly connected to the corresponding fixed plate is provided inside each coil.

[0014] Preferably, each guide ring outer wall is provided with a movable groove, the de-wire assembly includes a limiting ring fixedly connected to the outer wall of the guide ring, the limiting ring outer wall is provided with a guide groove connected to the corresponding movable groove, the inner side of the limiting ring is provided with a second limiting groove connected to the guide groove, the inner side of the limiting ring is provided with an adjustment groove arranged below the second limiting groove, the side of the adjustment groove away from the guide groove is provided with an adjustment cavity, the interior of the adjustment cavity is slidably connected with an adjustment member slidably connected to the adjustment groove, the inner side of the limiting ring is provided with a blocking groove arranged below the adjustment groove, the inner side of the limiting ring is provided with a falling-off groove connected to the movable groove, the second limiting groove, the adjustment groove and the blocking groove, and the interior of the adjustment cavity is filled with gas.

[0015] Preferably, the outer wall of the limiting ring is fixedly connected to a connecting plate fixedly connected to the corresponding fixing plate, the inner side of the connecting plate is slidably connected to a second magnet member slidably connected to the outer wall of the guide ring, a third elastic member is connected between the bottom of the second magnet member and the top of the connecting plate, a movable cavity is provided inside the limiting ring, an extrusion groove is provided on the outer wall of the adjusting member, an extrusion rod slidably connected to the movable cavity is fixedly connected to the bottom of the second magnet member, a movable member slidably connected to the extrusion groove is provided at the bottom end of the extrusion rod, when the second magnet member moves reciprocally up and down, it can drive the movable member to move inside the extrusion groove, and can make the adjusting member move inside the adjusting groove in a direction away from the guide groove, and a reset groove connected to the extrusion groove is provided on the outer wall of the adjusting member.

[0016] Preferably, a third accommodating groove is provided inside the adjusting member, a movable member penetrating the adjusting member is slidably connected inside the third accommodating groove, a fourth elastic member is connected between the top of the movable member and the inner wall of the third accommodating groove, a plurality of equidistantly distributed protrusions are fixedly connected inside the blocking groove, and when the adjusting member moves in a direction away from the guide groove, the movable member can enter the blocking groove and can intermittently contact the plurality of protrusions.

[0017] Preferably, a card is fixedly connected to the outer wall of the adapter, and the card can be inserted into the guide groove. When the card contacts the inner wall at the top of the guide groove, rotating the adapter can make the card enter the interior of the second limiting groove. When the card contacts the side of the second limiting groove away from the guide groove, the adjusting member can contact the card to block the card.

[0018] Preferably, a limiting member is fixedly connected to the outer wall of the adapter, the limiting member is arranged below the clamping member, and a photoelectric sensor electrically connected to the control unit is provided at the bottom of the limiting ring.

[0019] A transformer testing method comprises the following steps:

[0020] S1: Install the adapter into the adapter box and connect the adapter to the transformer under test through wires;

[0021] S2: The control unit controls the transformer of the transfer box on one side to supply power, and receives the current output by the transformer through the transfer box on the other side;

[0022] S3: The control unit monitors the input and output currents of the transformer in real time through the detection system to detect the performance of the transformer.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention sets a de-energizing mechanism. When the transformer stops power supply testing, the control unit can control the corresponding electromagnet to be energized, and can push the corresponding first magnet to move in a direction away from the electromagnet, driving the corresponding second conductive member to move in a direction away from the conductive joint. During this process, the third conductive member will be inserted into the corresponding second conductive slot, and the second conductive member can be connected to the ground through the third conductive member, the fourth conductive member, the coil and the first conductive member, so that the two adapters at the output end and the input end of the power-off circuit can be connected to the ground, and the residual current can enter the earth, thereby eliminating the residual current and preventing the internal residual current of the transformer from affecting subsequent tests.

[0025] The present invention arranges the off-line mechanism. When the transformer stops power supply for testing, the control unit can control the electromagnet of the corresponding power-off conductive joint to be energized. The second conductive member can be connected to the ground through the third conductive member, the fourth conductive member, the coil and the first conductive member to eliminate residual current. During this process, the current passes through the coil, which can make the iron core generate magnetic force, and can make the adjusting member move a distance in the direction away from the guide groove inside the adjusting groove. The adjusting member can still block the card member. When the residual current is eliminated, no current passes through the coil, and the third elastic member can be elastically reset, so that the second magnet member can move in the direction away from the limit ring, and the adjusting member can further move in the direction away from the guide groove inside the adjusting groove. The adjusting member disengages from blocking the card member, and the card member can enter the inside of the falling-off groove under the action of the elastic reset of the first elastic member, so that the adapter can fall off from the inside of the adapter groove, without the need for manual disassembly of the adapter, thereby improving safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a structural distribution diagram of the switching mechanism of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the power dissipation mechanism of the present invention;

[0030] Figure 4 It is a schematic diagram of the mechanism of the adapter slot of the present invention;

[0031] Figure 5 It is a structural schematic diagram of the adapter of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the conductor joint of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the off-line mechanism of the present invention;

[0034] Figure 8 It is a structural schematic diagram of the clamping member and the second limiting groove of the present invention;

[0035] Fig. 9 It is a structural schematic diagram of the blocking groove of the present invention;

[0036] Fig.10 It is a structural schematic diagram of the adjusting member of the present invention;

[0037] Fig.11It is a structural schematic diagram of the extrusion tank of the present invention;

[0038] Fig.12 It is a cross-sectional view of the overall structure of the present invention;

[0039] Fig.13 It is a structural schematic diagram of the isolation plate of the present invention;

[0040] Fig.14 It is a schematic structural diagram of the iron core of the present invention.

[0041] In the figure: 1, operating table; 11, control unit; 2, switching mechanism; 21, switching box; 22, switching slot; 23, conductive joint; 24, switching joint; 25, first conductive slot; 26, avoidance slot; 27, first accommodating slot; 28, second conductive member; 29, first elastic member; 210, first limiting slot; 211, clamp; 212, limiting member; 3, de-energizing mechanism; 31, first mounting slot; 32, first conductive member; 33, fixing plate; 34, conductive assembly; 35, coil; 36, slide slot; 37, isolation plate; 38, electromagnet; 39, first magnet member; 310, connecting rod; 311, second accommodating slot; 312, third conductive member; 313, second elastic member; 31 4. Second mounting groove; 315. Fourth conductive member; 316. Second conductive groove; 317. Iron core; 4. Off-line mechanism; 41. Guide ring; 42. Off-line assembly; 43. Movable groove; 44. Limiting ring; 45. Guide groove; 46. Second limiting groove; 47. Adjusting groove; 48. Adjusting cavity; 49. Adjusting member; 410. Blocking groove; 411. Dropping groove; 412. Connecting plate; 413. Second magnet member; 414. Third elastic member; 415. Movable cavity; 416. Extrusion groove; 417. Extrusion rod; 418. Movable member; 419. Third accommodating groove; 420. Moving member; 421. Fourth elastic member; 422. Bump; 423. Reset groove; 5. Photoelectric sensor. DETAILED DESCRIPTION

[0042] 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.

[0043] Embodiment 1

[0044] When the transformer is in no-load or light-load testing, since the current in the winding is very small, the voltage drop caused by these unbalanced electromagnetic fields and distributed capacitance will dominate, resulting in uneven voltage distribution in the winding, which in turn causes residual current to be generated inside the transformer, which not only affects subsequent tests but also poses a safety hazard.

[0045] See also Figures 1 to 8 The present invention provides the following technical solution: a transformer comprehensive test bench, comprising an operating table 1 and a control unit 11, and further comprising:

[0046] The adapter mechanism 2 includes an adapter box 21 fixedly connected to both sides of the operating table 1, each adapter box 21 is provided with a plurality of adapter slots 22, each adapter slot 22 is provided with a conductive joint 23 electrically connected to the control unit 11 at the top, each adapter slot 22 is provided with a conductive joint 23 electrically connected to the control unit 11 at the bottom, each adapter slot 22 is provided with a conductive joint 24 connected to the transformer wire, and the conductive joint 23 and the adapter 24 are used to perform connection test on the transformer;

[0047] The de-energizing mechanism 3 includes a first mounting groove 31 provided on the outer wall of each adapter box 21, a grounded first conductive member 32 is provided inside each first mounting groove 31, a plurality of fixing plates 33 are fixedly connected to the outer wall of each adapter box 21, the number of the fixing plates 33 is the same as that of the adapter groove 22 and the positions are corresponding, a conductive component 34 is provided on the top of each fixing plate 33, and a coil 35 connected to the first conductive member 32 and the conductive component 34 with electric wires is provided on the bottom of each fixing plate 33, which is used to eliminate the residual current of the transformer under test;

[0048] The disconnecting mechanism 4 includes a plurality of guide rings 41 fixedly connected to the bottom of each adapter box 21. The number of the guide rings 41 is the same as that of the adapter slots 22 and their positions correspond. The outer wall of each guide ring 41 is provided with a disconnecting component 42 for disconnecting the adapter 24 after the residual current is eliminated.

[0049] The adapters 24 on the two adapter boxes 21 are respectively connected to the input and output ends of the transformer under test through wires. The control unit 11 supplies power to the transformer through the adapter 24 on one side of the adapter box 21, and the control unit 11 receives and detects the current output by the transformer through the adapter 24 on the other side of the adapter box 21. The operating console 1 and the control unit 11 are existing technologies and will not be described in detail here.

[0050] A first conductive groove 25 and an avoidance groove 26 are provided at one end of each conductive joint 23 close to the adapter 24. The avoidance groove 26 is arranged above the first conductive groove 25 and is interconnected. A first receiving groove 27 is provided at one end of each adapter 24 close to the conductive joint 23. A second conductive member 28 electrically connected to the corresponding adapter 24 is slidably connected inside each first receiving groove 27. A first elastic member 29 is connected between the bottom of each second conductive member 28 and the inner wall of the corresponding first receiving groove 27. A first limiting groove 210 is provided at the top of each second conductive member 28.

[0051] The outer wall of each adapter box 21 is provided with a slide groove 36 having the same number and corresponding position as the adapter groove 22, each slide groove 36 is connected to the corresponding adapter groove 22, and the interior of each slide groove 36 is slidably connected with an isolation plate 37, and each isolation plate 37 can move inside the corresponding avoidance groove 26. The top outer wall of each adapter box 21 is provided with an electromagnet 38 having the same number and corresponding position as the isolation plate 37, and each electromagnet 38 is electrically connected to the control unit 11. The top of each isolation plate 37 is provided with a first magnet member 39. When the electromagnet 38 is energized to generate magnetic force, it can push the corresponding first magnet member 39 to move in a direction away from the electromagnet 38, and can drive the corresponding isolation plate 37 to move from the inside of the avoidance groove 26 to the inside of the corresponding first limiting groove 210, and drive the corresponding second conductive member 28 to move in a direction away from the conductive joint 23.

[0052] The top magnetic pole of the first magnet member 39 is the same as the magnetic pole generated by the electromagnet 38, that is, according to the principle of like poles repelling and opposite poles attracting, when the electromagnet 38 is energized, the magnetic force generated by the electromagnet 38 can push the first magnet member 39 away.

[0053] When installing the conductive joint 23, the staff first inserts the clamp 211 into the guide groove 45 and pushes the adapter 24 to move upward. At this time, the first limit groove 210 does not correspond to the isolation plate 37 and is in a staggered state. During the insertion of the adapter 24, the top of the second conductive member 28 will contact the isolation plate 37, which can push the isolation plate 37 to move in the direction close to the electromagnet 38 inside the slide groove 36. During this process, the second conductive member 28 will preferentially contact the first conductive groove 25, and continue to push the adapter 24 to move upward, squeezing The first elastic member 29, until the clamping member 211 contacts the inner wall at the top of the guide groove 45, the isolation plate 37 can enter the interior of the avoidance groove 26. At this time, since the electromagnet 38 is not energized, the top of the first magnet member 39 will contact the electromagnet 38, and then the adapter 24 is rotated to enable the clamping member 211 to enter the interior of the second limiting groove 46. When the clamping member 211 contacts the side of the second limiting groove 46 away from the guide groove 45, the first limiting groove 210 can correspond to the isolation plate 37, and the isolation plate 37 can enter the interior of the first limiting groove 210.

[0054] The conductive component 34 includes a connecting rod 310 fixedly connected to the fixing plate 33, a second receiving groove 311 is provided inside the top of the connecting rod 310, a third conductive member 312 is slidably connected inside the second receiving groove 311, a second elastic member 313 is connected between the bottom of the third conductive member 312 and the inner wall of the second receiving groove 311, a second mounting groove 314 is provided at the bottom of each isolation plate 37, a fourth conductive member 315 is provided inside each second mounting groove 314, a second conductive groove 316 corresponding to the third conductive member 312 is provided at the bottom of each fourth conductive member 315, and an iron core 317 fixedly connected to the corresponding fixing plate 33 is provided inside each coil 35;

[0055] In actual use, when the control unit 11 stops the power supply test of the transformer, the control unit 11 can control the electromagnet 38 of the corresponding power-off conductive joint 23 to be energized. The magnetic force generated by the electromagnet 38 can push the corresponding first magnet member 39 to move in a direction away from the electromagnet 38, and can drive the corresponding isolation plate 37 to move from the inside of the avoidance groove 26 to the inside of the corresponding first limiting groove 210, and drive the corresponding second conductive member 28 to move in a direction away from the conductive joint 23. The second conductive member 28 can be separated from the contact with the first conductive groove 25, and can further squeeze the first elastic member 29. During this process, the third conductive member 312 will be inserted into the corresponding second conductive groove 316. The isolation plate 37 can drive the third conductive member 312 to squeeze the second elastic member 313. The second conductive member 28 can be connected to the ground through the third conductive member 312, the fourth conductive member 315, the coil 35 and the first conductive member 32, so that the two adapters 24 at the output and input ends of the power-off circuit can be connected to the ground, and the residual current can be eliminated to prevent the internal residual current of the transformer from affecting subsequent tests.

[0056] Grounding provides a low-impedance path so that current can flow quickly into the ground, thereby reducing the intensity of the current and its impact on the equipment. Grounding is an existing technical means to eliminate residual current and will not be elaborated here.

[0057] By setting the de-energizing mechanism 3 of the present invention, when the transformer stops power supply testing, the control unit 11 can control the corresponding electromagnet 38 to be energized, and can push the corresponding first magnet 39 to move in the direction away from the electromagnet 38, driving the corresponding second conductive member 28 to move in the direction away from the conductive joint 23. During this process, the third conductive member 312 will be inserted into the corresponding second conductive slot 316, and the second conductive member 28 can be connected to the ground through the third conductive member 312, the fourth conductive member 315, the coil 35 and the first conductive member 32, so that the two adapters 24 at the output and input ends of the power-off circuit can be connected to the ground, and the residual current can enter the earth, thereby eliminating the residual current, avoiding the internal residual current of the transformer from affecting subsequent tests, and improving safety.

[0058] Embodiment 2

[0059] Based on the above embodiment, during the process of eliminating residual current of the transformer, the time for eliminating residual current cannot be determined. When the staff removes the adapter, if the residual current is not completely eliminated, it may cause safety hazards to the staff and the safety performance is low.

[0060] See also Figures 9 to 14 , each guide ring 41 is provided with a movable groove 43 on its outer wall, and the off-line assembly 42 includes a limiting ring 44 fixedly connected to the outer wall of the guide ring 41, a guide groove 45 connected to the corresponding movable groove 43 is provided on the outer wall of the limiting ring 44, a second limiting groove 46 connected to the guide groove 45 is provided on the inner side of the limiting ring 44, an adjusting groove 47 arranged below the second limiting groove 46 is provided on the inner side of the limiting ring 44, an adjusting cavity 48 is provided on the side of the adjusting groove 47 away from the guide groove 45, an adjusting piece 49 slidably connected to the adjusting groove 47 is slidably connected to the adjusting groove 47 inside the adjusting cavity 48, a blocking groove 410 arranged below the adjusting groove 47 is provided on the inner side of the limiting ring 44, a falling-off groove 411 connected to the movable groove 43, the second limiting groove 46, the adjusting groove 47 and the blocking groove 410 is provided on the inner side of the limiting ring 44, and the interior of the adjusting cavity 48 is filled with gas.

[0061] like Fig.11 As shown, the outer wall of the limiting ring 44 is fixedly connected with a connecting plate 412 fixedly connected with the corresponding fixing plate 33, the inner side of the connecting plate 412 is slidably connected with a second magnet member 413 slidably connected with the outer wall of the guide ring 41, the bottom of the second magnet member 413 and the top of the connecting plate 412 are connected with a third elastic member 414, a movable cavity 415 is provided inside the limiting ring 44, an extrusion groove 416 is provided on the outer wall of the adjusting member 49, an extrusion rod 417 slidably connected with the movable cavity 415 is fixedly connected with the bottom of the second magnet member 413, a movable member 418 slidably connected with the extrusion groove 416 is provided at the bottom end of the extrusion rod 417, when the second magnet member 413 reciprocates up and down, it can drive the movable member 418 to move inside the extrusion groove 416, and can make the adjusting member 49 move inside the adjusting groove 47 in a direction away from the guide groove 45, and a reset groove 423 connected with the extrusion groove 416 is provided on the outer wall of the adjusting member 49;

[0062] The top magnetic pole of the second magnet component 413 is the same as the magnetic pole generated by the iron core 317. When current passes through the coil 35, the iron core 317 can generate magnetic force, which can push the second magnet component 413 to move toward the direction close to the limit ring 44 and squeeze the third elastic component 414. When no current passes through the coil 35, the third elastic component 414 can be elastically reset, which can cause the second magnet component 413 to move away from the limit ring 44.

[0063] Under normal conditions, that is, when the second magnet member 413 does not move, the adjusting member 49 can block the drop-out groove 411 and block the locking member 211. When the adjusting member 49 moves in the adjustment groove 47 in a direction away from the guide groove 45, the adjusting member 49 can squeeze the gas in the adjustment chamber 48 and increase the pressure in the adjustment chamber 48. When the second magnet member 413 no longer moves, the movable member 418 can enter the reset groove 423 from the extrusion groove 416 and can be reset under the action of the air pressure in the adjustment chamber 48. The adjustment chamber 48 can then block the drop-out groove 411 again.

[0064] A third accommodating groove 419 is provided inside the adjusting member 49, and a moving member 420 that penetrates the adjusting member 49 is slidably connected inside the third accommodating groove 419, a fourth elastic member 421 is connected between the top of the moving member 420 and the inner wall of the third accommodating groove 419, and a plurality of equidistantly distributed protrusions 422 are fixedly connected inside the blocking groove 410, and when the adjusting member 49 moves in a direction away from the guide groove 45, the moving member 420 can enter the blocking groove 410 and can intermittently contact the plurality of protrusions 422.

[0065] The outer wall of the adapter 24 is fixedly connected with a clamping piece 211, which can be inserted into the guide groove 45. When the clamping piece 211 contacts the inner wall at the top of the guide groove 45, rotating the adapter 24 can make the clamping piece 211 enter the second limiting groove 46. When the clamping piece 211 contacts the side of the second limiting groove 46 away from the guide groove 45, the adjusting piece 49 can contact the clamping piece 211 to block the clamping piece 211.

[0066] The outer wall of the adapter 24 is fixedly connected to a limiting member 212 . The limiting member 212 is disposed below the clamping member 211 . A photoelectric sensor 5 electrically connected to the control unit 11 is disposed at the bottom of the limiting ring 44 .

[0067] When installing the guide joint 23, the staff first inserts the clamp 211 into the guide groove 45 and pushes the adapter 24 to move upward, and then rotates the adapter 24 to allow the clamp 211 to enter the second limit groove 46. When the clamp 211 contacts the side of the second limit groove 46 away from the guide groove 45, the adjustment member 49 can block the clamp 211, and the limit member 212 contacts the bottom of the limit ring 44, and the photoelectric sensor 5 can detect the existence signal of the limit member 212.

[0068] In actual use, when the transformer is tested for power supply stop, the control unit 11 can control the electromagnet 38 of the corresponding power-off conductive joint 23 to be energized, and the second conductive member 28 can be connected to the ground through the third conductive member 312, the fourth conductive member 315, the coil 35 and the first conductive member 32, so that the two adapters 24 at the output end and the input end of the power-off circuit can be connected to the ground to eliminate the residual current. In this process, the current passing through the coil 35 can make the iron core 317 generate magnetic force, which can push the second magnet member 413 to move in the direction close to the limit ring 44, squeeze the third elastic member 414, drive the movable member 418 to move inside the extrusion groove 416, and make the adjustment member 49 move in the adjustment groove 47 in the direction away from the guide groove 45. After moving a certain distance, the adjusting member 49 can still block the clamping member 211. When the residual current is eliminated, no current passes through the coil 35, and the third elastic member 414 can be elastically reset, so that the second magnet member 413 can move in the direction away from the limiting ring 44, and can still drive the movable member 418 to move inside the extrusion groove 416, so that the adjusting member 49 can further move in the direction away from the guide groove 45 inside the adjusting groove 47, so that the adjusting member 49 can be separated from blocking the clamping member 211, and the clamping member 211 can enter the falling-off groove 411 under the action of the elastic reset of the first elastic member 29, so that the adapter 24 can fall off from the inside of the adapter groove 22, and there is no need to manually disassemble the adapter 24, thereby improving the safety performance.

[0069] When the adjusting member 49 moves in the direction away from the guide groove 45, the movable member 420 can enter the interior of the blocking groove 410 and can intermittently contact with the multiple protrusions 422. When the adjusting member 49 is reset, the movable member 420 can still intermittently contact with the multiple protrusions 422, thereby increasing the friction force, reducing the time for resetting the adjusting member 49, and providing operating time for the card member 211 to enter the interior of the shedding groove 411. When the adapter 24 falls off from the adapter groove 22, the photoelectric sensor 5 cannot detect the existence signal of the limit member 212. At this time, the control unit 11 can control the corresponding electromagnet 38 to cut off the power.

[0070] The present invention sets the off-line mechanism 4. When the transformer stops power supply test, the control unit 11 can control the electromagnet 38 of the corresponding power-off conductive joint 23 to be energized. The second conductive member 28 can be connected to the ground through the third conductive member 312, the fourth conductive member 315, the coil 35 and the first conductive member 32 to eliminate the residual current. In this process, the current passes through the coil 35, which can make the iron core 317 generate magnetic force, and can make the adjustment member 49 move a distance in the adjustment slot 47 in the direction away from the guide slot 45. The adjustment member 49 can still block the clamp 211. When the residual current is eliminated, no current passes through the coil 35, and the third elastic member 414 can be elastically reset, so that the second magnet member 413 can move in the direction away from the limit ring 44, and the adjusting member 49 can further move in the direction away from the guide groove 45 inside the adjusting groove 47. The adjusting member 49 disengages from blocking the clamping member 211, and the clamping member 211 can enter the falling-off groove 411 under the action of the elastic reset of the first elastic member 29, so that the adapter 24 can fall off from the inside of the adapter groove 22, without the need for manual disassembly of the adapter 24, thereby improving the safety performance.

[0071] Embodiment 3

[0072] A transformer testing method comprises the following steps:

[0073] S1: Install the adapter 24 inside the adapter box 21, and connect the adapter 24 to the transformer under test through wires;

[0074] S2: The control unit 11 controls the transformer of the adapter box 21 on one side to supply power, and receives the current output by the transformer through the adapter box 21 on the other side;

[0075] S3: The control unit 11 monitors the input and output currents of the transformer in real time through the detection system to detect the performance of the transformer.

[0076] The detection procedure is a prior art method and will not be described in detail here.

[0077] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A transformer comprehensive test bench, comprising an operating table (1) and a control unit (11), characterized in that: Also includes: An adapter mechanism (2), the adapter mechanism (2) comprising an adapter box (21) fixedly connected to both sides of the operating table (1), each of the adapter boxes (21) being provided with a plurality of adapter slots (22), the top of each of the adapter slots (22) being provided with a conducting joint (23) electrically connected to the control unit (11), the bottom of each of the adapter slots (22) being provided with an adapter (24) connected to a transformer wire, the conducting joint (23) and the adapter (24) being used for performing connection testing on the transformer; A de-energizing mechanism (3), the de-energizing mechanism (3) comprising a first mounting groove (31) provided on the outer wall of each adapter box (21), a grounded first conductive member (32) being provided inside each of the first mounting grooves (31), a plurality of fixing plates (33) being fixedly connected to the outer wall of each adapter box (21), the fixing plates (33) being the same in number and corresponding in position to the adapter grooves (22), a conductive component (34) being provided on the top of each of the fixing plates (33), and a coil (35) being connected to the first conductive member (32) and the conductive component (34) by electric wires being provided on the bottom of each of the fixing plates (33), for eliminating residual current of the transformer under test; A first conductive groove (25) and an avoidance groove (26) are provided at one end of each conductive joint (23) close to the adapter (24); the avoidance groove (26) is arranged above the first conductive groove (25) and is interconnected; a first accommodating groove (27) is provided at one end of each adapter (24) close to the conductive joint (23); a second conductive member (28) electrically connected to the corresponding adapter (24) is slidably connected inside each first accommodating groove (27); a first elastic member (29) is connected between the bottom of each second conductive member (28) and the inner wall of the corresponding first accommodating groove (27); and a first limiting groove (210) is provided at the top of each second conductive member (28); The outer wall of each adapter box (21) is provided with slide grooves (36) of the same number and corresponding position as the adapter grooves (22); each slide groove (36) is connected to the corresponding adapter groove (22); the interior of each slide groove (36) is slidably connected with an isolation plate (37); each isolation plate (37) can move inside the corresponding avoidance groove (26); the top outer wall of each adapter box (21) is provided with electromagnets (38) of the same number and corresponding position as the isolation plate (37); each The electromagnets (38) are electrically connected to the control unit (11), and a first magnet (39) is provided on the top of each isolation plate (37). When the electromagnet (38) is energized to generate magnetic force, it can push the corresponding first magnet (39) to move in a direction away from the electromagnet (38), drive the corresponding isolation plate (37) to move from the inside of the avoidance groove (26) to the inside of the corresponding first limiting groove (210), and drive the corresponding second conductive member (28) to move in a direction away from the conductive joint (23); The conductive component (34) comprises a connecting rod (310) fixedly connected to the fixing plate (33); a second accommodating groove (311) is provided inside the top of the connecting rod (310); a third conductive member (312) is slidably connected inside the second accommodating groove (311); a second elastic member (313) is connected between the bottom of the third conductive member (312) and the inner wall of the second accommodating groove (311); a second mounting groove (314) is provided at the bottom of each isolation plate (37); a fourth conductive member (315) is provided inside each second mounting groove (314); a second conductive groove (316) corresponding to the third conductive member (312) is provided at the bottom of each fourth conductive member (315); and an iron core (317) fixedly connected to the corresponding fixing plate (33) is provided inside each coil (35).

2. The transformer comprehensive test bench according to claim 1 is characterized in that: It also includes a disconnection mechanism (4), the disconnection mechanism (4) including a plurality of guide rings (41) fixedly connected to the bottom of each adapter box (21), the guide rings (41) being the same in number and corresponding in position to the adapter slots (22), and the outer wall of each guide ring (41) being provided with a disconnection component (42) for disconnecting the adapter (24) after the residual current has been eliminated; Each guide ring (41) has an outer wall formed with a movable groove (43); the de-wire assembly (42) comprises a limiting ring (44) fixedly connected to the outer wall of the guide ring (41); the limiting ring (44) has an outer wall formed with a guide groove (45) connected to the corresponding movable groove (43); the limiting ring (44) has an inner side formed with a second limiting groove (46) connected to the guide groove (45); the limiting ring (44) has an inner side formed with an adjustment groove (47) arranged below the second limiting groove (46); the adjustment groove (47) An adjusting chamber (48) is provided on a side away from the guide groove (45); an adjusting member (49) is slidably connected to the adjusting groove (47) inside the adjusting chamber (48); a blocking groove (410) is provided on the inner side of the limiting ring (44) and is arranged below the adjusting groove (47); a drop-off groove (411) is provided on the inner side of the limiting ring (44) and is connected to the movable groove (43), the second limiting groove (46), the adjusting groove (47) and the blocking groove (410); and the interior of the adjusting chamber (48) is filled with gas; The outer wall of the limiting ring (44) is fixedly connected to a connecting plate (412) fixedly connected to the corresponding fixing plate (33); the inner side of the connecting plate (412) is slidably connected to a second magnet member (413) slidably connected to the outer wall of the guide ring (41); a third elastic member (414) is connected between the bottom of the second magnet member (413) and the top of the connecting plate (412); a movable cavity (415) is provided inside the limiting ring (44); an extrusion groove (416) is provided on the outer wall of the adjusting member (49); the bottom of the second magnet member (413) is fixedly connected to the outer wall of the guide ring (41); An extrusion rod (417) slidably connected to the movable cavity (415) is connected, and a movable member (418) slidably connected to the extrusion groove (416) is provided at the bottom end of the extrusion rod (417); when the second magnet member (413) reciprocates up and down, it can drive the movable member (418) to move inside the extrusion groove (416), and can make the adjustment member (49) move inside the adjustment groove (47) in a direction away from the guide groove (45); and a reset groove (423) connected to the extrusion groove (416) is provided on the outer wall of the adjustment member (49); A third accommodating groove (419) is provided inside the adjusting member (49), a moving member (420) penetrating the adjusting member (49) is slidably connected inside the third accommodating groove (419), a fourth elastic member (421) is connected between the top of the moving member (420) and the inner wall of the third accommodating groove (419), a plurality of equidistantly distributed protrusions (422) are fixedly connected inside the blocking groove (410), and when the adjusting member (49) moves in a direction away from the guide groove (45), the moving member (420) can enter the inside of the blocking groove (410) and can intermittently contact the plurality of protrusions (422); A clamping member (211) is fixedly connected to the outer wall of the adapter (24); the clamping member (211) can be inserted into the guide groove (45); when the clamping member (211) contacts the inner wall at the top of the guide groove (45), the adapter (24) can be rotated to allow the clamping member (211) to enter the second limiting groove (46); when the clamping member (211) contacts the side of the second limiting groove (46) away from the guide groove (45), the adjusting member (49) can contact the clamping member (211) to block the clamping member (211).

3. The transformer comprehensive test bench according to claim 2 is characterized in that: The outer wall of the adapter (24) is fixedly connected to a limiting member (212), the limiting member (212) is arranged below the clamping member (211), and the bottom of the limiting ring (44) is provided with a photoelectric sensor (5) electrically connected to the control unit (11).

4. A transformer testing method, using a transformer comprehensive test bench as claimed in claim 3, characterized in that: The following steps are involved: S1: Install the adapter (24) inside the adapter box (21), and connect the adapter (24) to the transformer under test through electric wires; S2: the control unit (11) controls the transformer of the transfer box (21) on one side to supply power, and receives the current output by the transformer through the transfer box (21) on the other side; S3: The control unit (11) monitors the input and output currents of the transformer in real time through the detection system to detect the performance of the transformer.

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