CN116699190A - Auxiliary wiring device for batch verification of mutual inductors - Google Patents
Auxiliary wiring device for batch verification of mutual inductors Download PDFInfo
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- CN116699190A CN116699190A CN202310589383.XA CN202310589383A CN116699190A CN 116699190 A CN116699190 A CN 116699190A CN 202310589383 A CN202310589383 A CN 202310589383A CN 116699190 A CN116699190 A CN 116699190A
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- 238000012795 verification Methods 0.000 title claims abstract description 38
- 229910052751 metal Inorganic materials 0.000 claims abstract description 44
- 239000002184 metal Substances 0.000 claims abstract description 44
- 238000001514 detection method Methods 0.000 claims description 69
- 238000009413 insulation Methods 0.000 claims description 39
- 238000005192 partition Methods 0.000 claims description 26
- 238000007790 scraping Methods 0.000 claims description 12
- 238000013459 approach Methods 0.000 claims description 9
- 235000014676 Phragmites communis Nutrition 0.000 claims description 4
- 244000089486 Phragmites australis subsp australis Species 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 description 9
- 230000001360 synchronised effect Effects 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 244000273256 Phragmites communis Species 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The application relates to an auxiliary wiring device for batch verification of transformers, which comprises a conveying belt, a frame, a lifting pressing plate, a metal pressing block, an elastic thimble, a positive plate and a negative plate; one metal press block in the same group of metal press blocks is electrically connected with a positive electrode contact, the other metal press block is electrically connected with a negative electrode contact, and a serial gap is reserved between the positive electrode contact and the negative electrode contact of the adjacent group; the positive electrode contact positioned at the outermost group is electrically connected with the positive electrode plate, and the negative electrode contact positioned at the other outermost group is electrically connected with the negative electrode plate; the positive plate is provided with a plurality of positive electrical contacts, and the negative plate is provided with a plurality of negative electrical contacts; a control board is movably arranged between the positive plate and the negative plate, a plurality of series contact pieces are arranged on the control board, and when the series contact pieces are propped against the series gaps, the series contact pieces are communicated with the corresponding adjacent groups of positive electrode contacts and negative electrode contacts. The application can conveniently switch the plurality of mutual inductors between a serial state and a parallel state, has high verification efficiency, low equipment cost and good economic benefit.
Description
Technical Field
The application relates to the technical field of transformer verification equipment, in particular to an auxiliary wiring device for batch verification of transformers.
Background
The transformer calibrating device is a special precision instrument for calibrating and testing the errors of the transformers before the transformer calibrating device is assembled in order to ensure the accuracy of the transformers in the electric energy metering device of the electric power system. The current transformer calibrating instrument can be divided into a current transformer calibrating instrument and a current transformer calibrating instrument according to the type of the transformer; or the integrated high-current generator, the booster and the like are integrated inside, and the integrated tester directly adopts high voltage and high current to test the excitation characteristics/volt-ampere characteristics, transformation ratio polarity and the like of the mutual inductor, so that the integrated tester can meet the test requirements of the excitation characteristics, transformation ratio, polarity, secondary winding resistance, secondary load, ratio difference, angle difference and the like of various CT, can also be used for testing the excitation characteristics, transformation ratio, polarity, secondary winding resistance, ratio difference and the like of various PT electromagnetic units, and can connect a plurality of current mutual inductors in series or connect a plurality of voltage mutual inductors in parallel when the integrated tester is used for detecting the mutual inductor in batches, and then is sequentially connected to a plurality of corresponding integrated testers for verification.
The Chinese patent with publication number CN106842096A in the related art proposes an auxiliary wiring device for batch verification of high-voltage current transformers, which comprises a conveyer belt and a rack; the surface of the conveying belt is provided with a plurality of grooves; the top of the frame is slidably provided with a lifting pressing plate, the bottom surface of the lifting pressing plate is provided with a plurality of metal pressing blocks at intervals, the metal pressing blocks are correspondingly arranged with bosses at the top end of the mutual inductor, each metal pressing block is electrically connected with each boss in one-to-one correspondence after the lifting pressing plate falls down, and a lead is connected between each metal pressing block so that each mutual inductor is connected in series to two ends of a power supply for detection; two lateral parts of the frame are provided with a plurality of telescopic elastic ejector pins, and each elastic ejector pin is electrically connected with a detection input terminal of the verification equipment through a secondary cable. The wiring device can simultaneously wire the primary side and the secondary side of the plurality of transformers, improves the wiring efficiency, reduces the wiring difficulty, has a simple structure, is convenient to operate and control, greatly improves the verification operation efficiency and reduces the labor intensity.
The related art in the above has the following drawbacks: when detecting the current transformers, a plurality of current transformers are connected in series to a detection power supply, and when detecting the voltage transformers, the plurality of voltage transformers are required to be connected in parallel to the detection power supply, so that when detecting the transformers with the opposite types, a readjustment circuit is required to be carried out on the wiring device, and the exchange efficiency is severely restricted; and if one of the plurality of series-connected current transformers is abnormal, such as open circuit, short circuit or excessively high impedance, the normal detection of other current transformers can be influenced, and the wiring device is difficult to quickly detect the current transformer with faults for the second time.
Disclosure of Invention
The application provides an auxiliary wiring device for batch verification of transformers, which can be used for rapidly detecting abnormal products in series-state current transformers and rapidly switching in verification modes of voltage and current transformers.
The auxiliary wiring device for batch verification of the mutual inductor provided by the application adopts the following technical scheme:
the auxiliary wiring device for batch verification of the mutual inductor comprises a conveying belt, a rack and a lifting pressing plate, wherein a plurality of metal pressing blocks which are grouped in pairs are arranged on the bottom surface of the lifting pressing plate at intervals, a plurality of telescopic elastic ejector pins which are grouped in four are arranged on the side part of the rack, and the auxiliary wiring device further comprises a positive plate and a negative plate which are respectively electrically connected with the positive electrode and the negative electrode of a power supply for detection;
the metal press blocks close to the positive plate in the same group are electrically connected with positive electrode contacts, the metal press blocks close to the negative plate in the same group are electrically connected with negative electrode contacts, the positive electrode contacts and the negative electrode contacts in the same group are respectively arranged at two sides of the arrangement direction of the metal press blocks, the positive electrode contacts and the negative electrode contacts in the adjacent group are correspondingly arranged, and a serial gap is reserved between the positive electrode contacts and the negative electrode contacts; the positive electrode contact positioned at the outermost group is electrically connected with the positive electrode plate, and the negative electrode contact positioned at the other outermost group is electrically connected with the negative electrode plate;
the positive plate is provided with a plurality of positive electrical contacts which are in one-to-one correspondence with the positive contacts, and the negative plate is provided with a plurality of negative electrical contacts which are in one-to-one correspondence with the negative contacts;
the positive plate and the negative plate are movably provided with a control plate, the control plate is provided with a plurality of series contact pieces which are in one-to-one correspondence with a plurality of series gaps, and when the series contact pieces are propped against the series gaps, the series contact pieces are communicated with the corresponding adjacent groups of positive electrode contacts and negative electrode contacts.
Furthermore, the positive plate, the negative plate and the control plate are all arranged on the top surface of the lifting pressing plate and are arranged in parallel, and a control driving piece for driving the control plate to be close to/far away from the lifting pressing plate is arranged on the lifting pressing plate;
the lifting pressing plate is also provided with a same moving mechanism which drives the positive plate and the negative plate to approach or separate from each other along with the lifting or descending of the control plate; when the control board is lifted to the maximum stroke, the positive plate and the negative plate are close to each other until the positive electrical contact is electrically connected with the positive contact, and the negative electrical contact is electrically connected with the negative contact.
Still further, be provided with on the lift clamp plate and be used for the anticreep direction the positive plate with the anticreep direction piece of negative plate, with the actuating mechanism including one end articulates on the control panel, the other end articulates the positive plate or the connecting rod on the negative plate, the connecting rod is followed control panel length direction is provided with a plurality of.
Still further, the lifting press plate top surface in the series gap Zhou Cewei is equipped with insulating partition wall, adjacent group positive electrode contact with the negative electrode contact is located same in the insulating partition wall, insulating partition wall is close to one side of positive plate has been seted up and has been supplied the positive electrode opening that positive electrical contact passed through, insulating partition wall is close to one side of negative plate has been seted up and has been supplied the negative electrode opening that negative electrical contact passed through.
Further, a positive insulation stop block which is embedded with the positive notch and is matched with the positive insulation stop block is arranged on one side of the positive contact close to the insulation partition wall, a negative insulation stop block which is embedded with the negative notch and is matched with the negative insulation stop block is arranged on one side of the negative contact close to the insulation partition wall, and the positive insulation stop block and the negative insulation stop block are arranged in a staggered mode;
when the positive and negative plates are moved into place, the positive and negative insulating blocks are spliced and isolating the positive and negative electrical contacts.
Furthermore, the positive electrical contact and the negative electrical contact are both made of reeds, and scraping pieces for scraping the positive electrical contact or the negative electrical contact are arranged at the positive electrode opening and the negative electrode opening of the lifting pressing plate.
Still further, the movable head of elasticity thimble is equipped with the detection contact in an insulating way, the frame lateral part is installed a plurality of and four with same group the equal pick-up plate that corresponds of elasticity thimble, be provided with on the pick-up plate and be used for detecting elasticity thimble and mutual-inductor secondary side binding post support the detection mechanism of tight degree.
Further, the detection mechanism comprises a detection loop and a feedback element, wherein the detection loop is arranged on the detection plate, and the feedback element is connected in series in the detection loop, and a circuit breaking part is arranged at a part of the detection loop corresponding to the detection contact; when the elastic thimble is pushed by the secondary side connecting terminal of the transformer to move reversely, the detection contact is connected with the circuit breaking part.
Furthermore, an insulating seat is fixedly connected on the movable head of the elastic thimble, an adjusting bolt axially arranged along the elastic thimble is threaded on the insulating seat, and the detecting contact is arranged at the free end of the adjusting bolt.
Further, a plurality of the elastic ejector pins are connected with a side joint plate together, a linear driving piece for driving the side joint plate to approach the conveying belt is arranged on the frame, and the linear driving piece is in control connection with the feedback element.
In summary, the beneficial technical effects of the application are as follows:
1. when the current transformers are subjected to series batch detection, when an abnormal product is required to be judged by single detection or a voltage transformer in a parallel state is required to be detected when an abnormal product is required to be detected by individual transformers, driving the series contact pieces on the control panel to be separated from the series gaps so as to relieve the series state of the plurality of metal press blocks, simultaneously driving the positive electrode plates and the negative electrode plates to be close to each other, enabling the positive electric contacts on the positive electrode plates to be respectively electrically connected with the positive electrode contacts on the plurality of groups of metal press blocks, enabling the negative electric contacts on the negative electrode plates to be respectively electrically connected with the negative electrode contacts on the plurality of groups of metal press blocks, and enabling the plurality of transformers to be in a parallel state so as to carry out isobaric and synchronous verification on each transformer; the auxiliary wiring device can be used for quite simply and conveniently switching the plurality of transformers between the serial connection state and the parallel connection state, and only the relative positions of the control panel, the positive plate and the electrode plate are required to be changed, so that the operation is simple and convenient, the structure is simple, the verification efficiency of the transformers is improved, the equipment setting cost is obviously controlled, and good economic benefits are realized;
2. the connecting rod and the anti-drop guide piece are arranged, so that the position adjustment of the positive plate and the negative plate can be realized in the lifting control process of the control plate, the automation degree is higher, the verification is more intelligent, the control logic and the control element are simplified when a plurality of transformers are switched between a serial state and a parallel state, the influence of a strong magnetic field on the sensitivity of the control element after the transformers are electrified is greatly reduced, and the later maintenance cost is also greatly reduced;
3. when the positive plate and the negative plate are close to each other, the positive insulation stop block and the negative insulation stop block can be spliced into an insulation partition before the positive contact is contacted with the positive contact and the negative contact is contacted with the negative contact, so that the positive contact and the negative contact are effectively insulated and isolated, and the short circuit phenomenon caused by too close distance between the positive circuit and the negative circuit is effectively avoided, thereby greatly reducing the potential safety hazard caused by continuous power-off switching between a serial state and a parallel state.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present application.
Fig. 2 is a top view of a lifting platen according to an embodiment of the present application.
Fig. 3 is a bottom view of the control board of an embodiment of the present application.
Fig. 4 is a top view of a detection mechanism according to an embodiment of the present application.
Reference numerals illustrate:
11. a conveyor belt; 12. a frame; 13. a lifting pressing plate; 14. an anti-drop guide; 15. a lateral connecting plate; 16. a linear driving member;
2. a metal briquetting; 21. a positive electrode contact; 22. a negative electrode contact; 23. a series gap;
3. an elastic ejector pin;
4. a positive plate; 41. positive electrical contact;
5. a negative plate; 51. a negative electrical contact;
6. a control board; 61. a series contact; 62. controlling the driving member; 63. a connecting rod;
71. an insulating partition wall; 72. positive electrode notch; 73. a negative electrode notch; 74. a positive electrode insulation stopper; 75. a negative electrode insulating stopper; 76. a scraper;
81. detecting a contact; 82. a detection plate; 83. a detection loop; 84. a breaking section; 85. an insulating base; 86. and (5) adjusting a bolt.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The embodiment of the application discloses an auxiliary wiring device for batch verification of transformers. Referring to fig. 1 and 2, the auxiliary wiring device for batch verification of the transformers comprises a conveying belt 11, a frame 12 and a lifting pressing plate 13, wherein a positioning groove or a positioning frame for positioning and separating the transformers is arranged on the conveying belt 11, the lifting pressing plate 13 is driven by a lifting driving piece, the lifting driving piece can be an air cylinder, an oil cylinder, an electric cylinder or a linear motor, and the like, and in the embodiment, the lifting driving piece is an air cylinder. The bottom surface of the lifting pressing plate 13 is provided with a plurality of metal pressing blocks 2 in groups at intervals, two metal pressing blocks 2 in a group correspond to a metal boss at the upper end of a mutual inductor, a plurality of four telescopic elastic ejector pins 3 which are a group are arranged on the side part of the stand 12, each group of four elastic ejector pins 3 are correspondingly connected to a transit junction box, and the transit junction box is electrically connected with a detection input terminal of verification equipment.
More specifically, referring to fig. 1 and 2, the auxiliary wiring device further includes positive and negative electrode plates 4, 5 electrically connected to the positive and negative electrodes of the power supply for detection, respectively; the metal press blocks 2 close to the positive plate 4 in the same group of metal press blocks 2 are electrically connected with positive electrode contacts 21, the metal press blocks 2 close to the negative plate 5 in the same group of metal press blocks 2 are electrically connected with negative electrode contacts 22, the positive electrode contacts 21 and the negative electrode contacts 22 in the same group are arranged on two sides of the arrangement direction of the metal press blocks 2 in a separated mode, the positive electrode contacts 21 and the negative electrode contacts 22 in adjacent groups are correspondingly arranged, and serial gaps 23 are reserved between the positive electrode contacts 21 and the negative electrode contacts 22; the positive electrode contact 21 located in the outermost group is electrically connected to the positive electrode plate 4, and the negative electrode contact 22 located in the other outermost group is electrically connected to the negative electrode plate 5.
Meanwhile, referring to fig. 2 and 3, the positive electrode plate 4 is provided with a plurality of positive electrical contacts 41 corresponding to the plurality of positive electrode contacts 21 one by one, and the negative electrode plate 5 is provided with a plurality of negative electrical contacts 51 corresponding to the plurality of negative electrode contacts 22 one by one; a control board 6 is movably arranged between the positive plate 4 and the negative plate 5, a plurality of series contact pieces 61 corresponding to the series gaps 23 one by one are arranged on the control board 6, and when the series contact pieces 61 are pressed against the series gaps 23, the series contact pieces 61 are connected with the corresponding adjacent groups of positive electrode contacts 21 and negative electrode contacts 22.
After setting up like this, when examining the transformer in batches, put a plurality of mutual-inductors on conveyer belt 11 in proper order earlier, control the interval between two adjacent mutual-inductors, restart conveyer belt 11 makes a plurality of mutual-inductors remove to the position of detecting, the metal boss of a plurality of mutual-inductors top is aimed at with a plurality of metal briquetting 2 on the lift clamp plate 13 one by one respectively this moment, a plurality of secondary side terminal on a plurality of mutual-inductors are aimed at with a plurality of elasticity thimble 3 on the frame 12 respectively simultaneously, close conveyer belt 11 this moment, lift driver drives lift clamp plate 13 to move down and make its metal briquetting 2 butt press the metal boss of transformer top make it switch-on, drive a plurality of elasticity thimble 3 again and be close towards the mutual-inductor simultaneously so that elasticity thimble 3 and secondary side terminal switch-on, just so accomplished the basic connection of mutual-inductor and verification equipment.
When the current transformers are detected in batches, a plurality of current transformers can be connected in series, load circuits can be conveniently and synchronously adjusted, detection efficiency is improved, at the moment, the control board 6 can be driven to approach the lifting pressing board 13, so that a plurality of series contact pieces 61 on the control board 6 are respectively pressed against a plurality of series gaps 23, at the moment, the positive plate 4 is electrically connected with one group of metal pressing blocks 2 at the outermost side, the negative plate 5 is electrically connected with one group of metal pressing blocks 2 at the other outermost side, and two adjacent groups of metal pressing blocks 2 are connected in series through the series contact pieces 61, so that the plurality of current transformers can be connected in series in one step, and the current transformers can be directly detected after a detection power supply is started.
When an abnormal article is required to be singly detected and judged when an abnormal article is required to be detected or a voltage transformer in a parallel state is required to be detected in an abnormal state of each current transformer, the control board 6 can be driven to be far away from the lifting board, so that the serial contact piece 61 on the control board 6 is separated from the serial gap 23 to release the serial state of the plurality of metal press blocks 2, meanwhile, the positive electrode plate 4 and the negative electrode plate 5 are driven to be close to each other, the positive electric contact 41 on the positive electrode plate 4 is respectively electrically connected with the positive electrode contacts 21 on the plurality of groups of metal press blocks 2, the negative electric contact 51 on the negative electrode plate 5 is respectively electrically connected with the negative electrode contacts 22 on the plurality of groups of metal press blocks 2, and thus the plurality of transformers are formed into a parallel state, and each transformer can be subjected to isobaric and synchronous verification.
Therefore, the auxiliary wiring device is quite simple and convenient to switch the plurality of transformers between the series connection state and the parallel connection state, only the relative positions of the control plate 6, the positive plate 4 and the electrode plates are required to be changed, the operation is simple and convenient, the structure is simple, the equipment setting cost is obviously controlled while the verification efficiency of the transformers is improved, and the auxiliary wiring device has good economic benefit.
More specifically, in order to further improve the automation performance of the present application, referring to fig. 1 and 2, the negative effects of manual operation in the transformer verification are reduced, the positive plate 4, the negative plate 5 and the control plate 6 of the present application are all disposed on the top surface of the lifting pressing plate 13 and are in a parallel strip shape, and the three are all made of insulating materials, such as plastics, ceramics, etc.; the lifting pressing plate 13 is provided with a control driving piece 62 for driving the control board 6 to be close to/far away from the lifting pressing plate 13, the control driving piece 62 can be an air cylinder, an oil cylinder, an electric cylinder or a linear motor, and the like, and in the embodiment, the control driving piece 62 is an air cylinder; in specific implementation, the control board 6 is disconnected in the middle of the lifting pressing board 13, and two control driving pieces 62 drive the two sections of control boards 6 to synchronously lift. The lifting pressing plate 13 is provided with a release guide 14 for guiding the positive electrode plate 4 and the negative electrode plate 5, and the release guide 14 may be a plurality of guide rods or release slide rails penetrating through the positive electrode plate 4 and/or the negative electrode plate 5, so long as the positive electrode plate 4 and the negative electrode plate 5 can be limited to move only along the length direction perpendicular to the positive electrode plate 4 and the negative electrode plate 5.
Referring to fig. 1 and 2, the lifting pressing plate 13 is further provided with a synchronous mechanism for driving the positive plate 4 and the negative plate 5 to approach or separate from each other along with the lifting or descending of the control plate 6; when the control board 6 is lifted to the maximum stroke, the positive electrode plate 4 and the negative electrode plate 5 come close to each other so that the positive electrical contact 41 is electrically connected to the positive electrode contact 21, and the negative electrical contact 51 is electrically connected to the negative electrode contact 22. In particular, the synchronous mechanism includes a plurality of links 63, one end of which is hinged to the control board 6 and the other end of which is hinged to the positive electrode plate 4 or the negative electrode plate 5, and the links 63 are provided along the length direction of the control board 6.
And in order to ensure that the positive electrical contact 41 is accurately electrically connected to the positive contact 21 and the negative electrical contact 51 is accurately electrically connected to the negative contact 22 when the positive electrode plate 4 and the negative electrode plate 5 are brought close together, the end of the connecting rod 63 away from the control plate 6 should be disposed on the side of the positive electrode plate 4 or the negative electrode plate 5 connected thereto away from the control plate 6.
After the arrangement, when the transformers are switched to the series state, the control driving piece 62 drives the control board 6 to approach the lifting pressing board 13, and the positive plates 4 and the negative plates 5 on two sides of the control board 6 are uniformly pushed to move away from each other by the connecting rods 63 when the control board 6 moves downwards until the series contact pieces 61 on the control board 6 are correspondingly connected with the positive contacts 21 and the negative contacts 22 on two sides of the series gaps 23 respectively, and the transformers are connected in series. When the transformers are required to be switched into the parallel state, the control driving piece 62 drives the control board 6 to be far away from the lifting pressing board 13, and the positive plates 4 and the negative plates 5 on two sides of the control board 6 are uniformly pulled to move close to each other through the connecting rods 63 when the control board 6 moves upwards until the positive electrical contacts 41 on the positive plates 4 are respectively electrically connected with the positive electrical contacts 21 on the multi-group metal press blocks 2, so that the negative electrical contacts 51 on the negative plates 5 are respectively electrically connected with the negative electrical contacts 22 on the multi-group metal press blocks 2, and the transformers are connected in parallel. Therefore, through the arrangement of the connecting rod 63 and the anti-falling guide piece 14, the position adjustment of the positive plate 4 and the negative plate 5 can be realized in the lifting control process of the control board 6, the control logic and the control elements of the application when a plurality of transformers are switched between a serial state and a parallel state are simplified, the influence of a strong magnetic field on the sensitivity of the control elements after the transformers are electrified is greatly reduced, and the later maintenance cost is also greatly reduced.
On the other hand, considering that the mutual inductor basically has a high-current or high-voltage working state when in work, when the mutual inductor is switched between a parallel state and a serial state, potential discharge hazards easily exist, and the normal work of two adjacent mutual inductors can be interfered to influence the verification result; in addition, if the high-efficiency switching between the serial connection state and the parallel connection state of the plurality of transformers is to be realized, the positive electrode contact 21 and the negative electrode contact 22 of the adjacent groups are necessarily arranged close to each other, so that the distance between the positive electric contact 41 and the negative electric contact 51 is too close when the mutual inductors are switched to the parallel connection state, the short circuit phenomenon is easily caused, and the potential safety hazard is large.
Therefore, referring to fig. 2, the top surface of the lifting/lowering platen 13 is provided with an insulating partition wall 71 around the periphery of the series gap 23, the adjacent sets of positive electrode contacts 21 and negative electrode contacts 22 are provided in the same insulating partition wall 71, a positive electrode opening 72 through which the positive electrode contact 41 passes is provided on the side of the insulating partition wall 71 close to the positive electrode plate 4, and a negative electrode opening 73 through which the negative electrode contact 51 passes is provided on the side of the insulating partition wall 71 close to the negative electrode plate 5.
Further, referring to fig. 2, a positive insulation stop 74 which is jogged and matched with the positive notch 72 is provided on one side of the positive electrical contact 41 close to the insulation partition wall 71, a negative insulation stop 75 which is jogged and matched with the negative notch 73 is provided on one side of the negative electrical contact 51 close to the insulation partition wall 71, the positive insulation stop 74 and the negative insulation stop 75 are in dislocation arrangement, and it is further required to define definitely that the positive contact 21 and the negative contact 22 in the same insulation partition wall 71 are in dislocation arrangement or are not collinear in the arrangement direction of the two metal press blocks 2 in the same group, the positive insulation stop 74 and the positive electrical contact 41 on the corresponding positive plate 4 are sequentially arranged along the length direction of the positive plate 4, and the negative insulation stop 75 and the negative electrical contact 51 on the negative plate 5 are sequentially arranged along the length direction of the negative plate 5; after the positive and negative electrode plates 4, 5 are moved into place, the positive and negative electrode insulation blocks 74, 51 are spliced together and isolate the positive and negative electrical contacts 41, 51. The insulating partition wall 71, the positive electrode insulating stopper 74, and the negative electrode insulating stopper 75 described above are each made of ceramic.
In this way, when the control board 6 is lowered to electrically connect the positive electrode contact 21 and the negative electrode contact 22 in the same insulating partition wall 71 with the series contact 61, the insulating partition wall 71 can perform insulation protection as comprehensively as possible for each of the electrical connection contacts, and the arc influence at the time of power up is reduced. Meanwhile, when the control board 6 is lifted, the positive electrode plate 4 and the negative electrode plate 5 are close to each other, the positive electrode insulation stop 74 on the positive electrode plate 4 firstly passes through the positive electrode notch 72 on the insulation partition wall 71, the negative electrode insulation stop 75 on the negative electrode plate 5 also passes through the negative electrode notch 73 on the insulation partition wall 71, and the positive electrode insulation stop 74 and the negative electrode insulation stop 75 can be spliced into insulation partition before the positive electric contact 41 contacts the positive electrode contact 21 and the negative electric contact 51 contacts the negative electrode contact 22, so that the positive electric contact 41 and the positive electrode contact 21 and the negative electric contact 51 and the negative electrode contact 22 are effectively insulated and isolated, and the short circuit phenomenon caused when the distance between the positive electrode path and the negative electrode path is too short is effectively avoided, thereby greatly reducing the potential safety hazard caused by switching between a serial state and a parallel state.
Meanwhile, considering that the positive and negative electrical contacts 41 and 51 need to be subjected to high voltage and high current when the present application switches the parallel state, an oxide layer is easily formed on the positive and negative electrical contacts 41 and 51 to affect the conductivity of the electrical connection, and thus, referring to fig. 2, on the one hand, the positive and negative electrical contacts 41 and 51 are each made of a reed, specifically, made of copper or copper-aluminum alloy; on the other hand, a scraping piece 76 for scraping the positive electrical contact 41 or the negative electrical contact 51 is provided at each of the positive electrode cutout 72 and the negative electrode cutout 73 of the lifter plate 13, and the scraping piece 76 may be stone or ceramic, but the tip of the scraping piece 76 should have a frosted surface.
In this way, each time the positive electrode plate 4 and the negative electrode plate 5 are switched between the series state and the parallel state of the present application, the positive contact 41 and the negative contact 51 on the positive electrode plate 4 and the negative electrode plate 5 are scraped by the frosted surfaces on the scraping members 76, and the positive contact 41 and the negative contact 51 are made to be reeds, so that the positive contact 41 and the negative contact 51 can be ensured to slide in elastic abutment while passing through the scraping members 76, thereby ensuring an effective scraping effect of the scraping members 76 against the positive contact 41 and the negative contact 51 as much as possible, and further ensuring good conductivity of the positive electrode plate 4 and the negative electrode plate 5.
In addition, in the process that the secondary side wiring terminals of the transformers are in conflict with the elastic ejector pins 3, it is difficult to ensure that all the elastic ejector pins 3 are tightly connected with the corresponding secondary side wiring terminals, the possibility of missed detection may exist, and further the identification efficiency is affected.
In view of this, referring to fig. 1 and 4, the plurality of elastic ejector pins 3 are commonly connected with the side plates 15, the frame 12 is provided with a linear driving member 16 for driving the side plates 15 to approach the conveyor belt 11, and the linear driving member 16 may be a cylinder, an oil cylinder, an electric cylinder, or a linear motor, and in this embodiment, the linear driving member 16 is a cylinder; the side connection plate 15 is fixedly connected with a plurality of detection plates 82, one detection plate 82 corresponds to the same group of four elastic ejector pins 3, the same group of four elastic ejector pins 3 are arranged on the detection plate 82, and the detection plate 82 is provided with a detection mechanism for detecting the abutting degree of the same group of four elastic ejector pins 3 and a corresponding secondary side terminal of the transformer.
Specifically, referring to fig. 1 and 4, a detection contact 81 is mounted on a movable head of the elastic thimble 3 in an insulating manner, the detection mechanism includes a detection loop 83 disposed on a detection board 82 and a feedback element connected in series in the detection loop 83, a circuit breaking part 84 is disposed at a position of the detection loop 83 corresponding to the detection contact 81, and the detection loop 83 is a weak current circuit and is internally provided with a weak current power supply; when the elastic thimble 3 is pushed by the secondary side connecting terminal of the transformer to move reversely, the detection contact 81 turns on the circuit breaking part 84. In practical application, the feedback element may be a lamp bead, a light alarm, an audible and visual alarm, or may be a controller for controlling the operation of other components, and in this embodiment, the feedback element is an LED lamp bead.
When the linear driving piece 16 drives the side connection plate 15 to approach the conveyor belt 11, the plurality of elastic ejector pins 3 on the side connection plate 15 are respectively abutted against the secondary side connection terminals of the plurality of transformers, the movable heads of the elastic ejector pins 3 drive the detection contacts to retract, the detection contacts 81 are embedded into one of the circuit breaking parts 84 of the detection circuit 83, until the detection contacts 81 on the four elastic ejector pins 3 in the same group are simultaneously embedded into the corresponding circuit breaking parts 84, the detection circuit 83 is conducted, and the feedback element sends out a starting signal, for example, an LED lamp bead lights to display that the corresponding transformer is firmly connected with the transfer junction box; if the mutual inductor is put and deflected, and the detection contact 81 on one or at least one elastic thimble 3 cannot be engaged with the corresponding circuit breaking part 84, the detection loop 83 does not form a closed loop, the feedback element cannot send a feedback signal, and the mutual inductor should be adjusted at this time, so that the detection of the feedback element by field personnel can clearly and accurately correct the mutual inductor which is not put correctly.
In another possible embodiment, the linear drive 16 is in control connection with a feedback element;
in one case, the plurality of feedback elements are in control connection with the linear driving member 16 through one controller, so that the linear driving member 16 is controlled to stop driving the lateral connecting plate 15 to move towards the direction approaching the transformer only when all the feedback elements feed back the corresponding detection loops 83 to form a closed loop, so as to finally ensure that the secondary side terminals on all the transformers are abutted against the corresponding elastic ejector pins 3. However, there may be a disadvantage that a part of the elastic thimble 3 is propped against too tightly or exceeds the telescopic travel of the elastic thimble 3, which may have a great influence on the service life of the elastic thimble 3.
Correspondingly, in another case, a plurality of linear driving members 16 and a plurality of side connection plates 15 are arranged, for example, two groups, three groups, four groups and the like can be determined according to the number of the transformers detected in batches and the set budget of equipment, so that the controlled factors of the single linear driving member 16 can be reduced, the detection result of the detection mechanism is more accurate, and the strain damage to the elastic ejector pins 3 is reduced. For example, in the present embodiment, two sets of linear drives 16 and side plates 15 are provided, see in particular fig. 1.
In order to facilitate the adjustment of the detection sensitivity of the detection mechanism, referring to fig. 4, an insulating seat 85 is fixedly connected to the movable head of the elastic thimble 3, an adjusting bolt 86 axially arranged along the elastic thimble 3 is threaded on the insulating seat 85, and a detection contact 81 is mounted at the free end of the adjusting bolt 86. When the adjusting bolt 86 is rotated again, the initial displacement of the detecting contact 81 from the breaking portion 84 can be changed, and the detection sensitivity of the detecting mechanism can be adjusted.
The implementation principle of the auxiliary wiring device for batch verification of the mutual inductor provided by the embodiment of the application is as follows: when the current transformers are subjected to series batch detection, when an abnormal product is required to be judged by single detection or a voltage transformer in a parallel state is required to be detected when an abnormal condition occurs to the individual transformer, the control board 6 can be driven to be far away from the lifting plate, so that the series contact piece 61 on the control board 6 is separated from the series gap 23 to release the series state of the plurality of metal press blocks 2, meanwhile, the positive electrode plate 4 and the negative electrode plate 5 are driven to be close to each other, the positive electric contact 41 on the positive electrode plate 4 is respectively electrically connected with the positive electrode contacts 21 on the plurality of groups of metal press blocks 2, the negative electric contact 51 on the negative electrode plate 5 is respectively electrically connected with the negative electrode contacts 22 on the plurality of groups of metal press blocks 2, and thus the plurality of transformers are formed into a parallel state, and isobaric and synchronous verification can be carried out on each transformer.
Therefore, the auxiliary wiring device is quite simple and convenient to switch the plurality of transformers between the series connection state and the parallel connection state, only the relative positions of the control plate 6, the positive plate 4 and the electrode plates are required to be changed, the operation is simple and convenient, the structure is simple, the equipment setting cost is obviously controlled while the verification efficiency of the transformers is improved, and the auxiliary wiring device has good economic benefit.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (10)
1. The auxiliary wiring device for batch verification of the mutual inductor comprises a conveying belt (11), a frame (12) and a lifting pressing plate (13), wherein a plurality of metal pressing blocks (2) which are grouped in pairs are arranged on the bottom surface of the lifting pressing plate (13) at intervals, and a plurality of elastic ejector pins (3) which are four in groups and telescopic are arranged on the side part of the frame (12), and the auxiliary wiring device is characterized by further comprising a positive plate (4) and a negative plate (5) which are respectively electrically connected with the positive electrode and the negative electrode of a power supply for detection;
the metal press blocks (2) close to the positive plate (4) in the same group are electrically connected with positive electrode contacts (21), the metal press blocks (2) close to the negative plate (5) in the same group are electrically connected with negative electrode contacts (22), the positive electrode contacts (21) and the negative electrode contacts (22) in the same group are arranged on two sides of the arrangement direction of the metal press blocks (2), and the positive electrode contacts (21) and the negative electrode contacts (22) in adjacent groups are correspondingly arranged and a serial gap (23) is reserved between the positive electrode contacts and the negative electrode contacts; the positive electrode contact (21) positioned at the outermost group is electrically connected with the positive electrode plate (4), and the negative electrode contact (22) positioned at the other outermost group is electrically connected with the negative electrode plate (5);
a plurality of positive electrical contacts (41) which are in one-to-one correspondence with a plurality of positive electrode contacts (21) are arranged on the positive electrode plate (4), and a plurality of negative electrical contacts (51) which are in one-to-one correspondence with a plurality of negative electrode contacts (22) are arranged on the negative electrode plate (5);
a control board (6) is movably arranged between the positive electrode plate (4) and the negative electrode plate (5), a plurality of series contact pieces (61) which are in one-to-one correspondence with the series gaps (23) are arranged on the control board (6), and when the series contact pieces (61) are propped against the series gaps (23), the series contact pieces (61) are connected with the corresponding adjacent groups of positive electrode contacts (21) and negative electrode contacts (22).
2. The auxiliary wiring device for batch verification of transformers according to claim 1, wherein the positive plate (4), the negative plate (5) and the control plate (6) are all arranged on the top surface of the lifting pressing plate (13) and are arranged in parallel, and a control driving piece (62) for driving the control plate (6) to be close to/far away from the lifting pressing plate (13) is arranged on the lifting pressing plate (13);
the lifting pressing plate (13) is also provided with a same moving mechanism which drives the positive plate (4) and the negative plate (5) to approach or separate from each other along with the lifting or descending of the control plate (6); when the control board (6) is lifted to the maximum stroke, the positive plate (4) and the negative plate (5) are close to each other until the positive electrical contact (41) is electrically connected with the positive contact (21), and the negative electrical contact (51) is electrically connected with the negative contact (22).
3. The auxiliary wiring device for batch verification of transformers according to claim 2, wherein the lifting pressing plate (13) is provided with an anti-falling guide piece (14) for anti-falling guiding the positive plate (4) and the negative plate (5), the same-purpose mechanism comprises a connecting rod (63) with one end hinged to the control plate (6) and the other end hinged to the positive plate (4) or the negative plate (5), and the connecting rod (63) is provided with a plurality of connecting rods along the length direction of the control plate (6).
4. The auxiliary wiring device for batch verification of transformers according to claim 2, wherein an insulating partition wall (71) is arranged on the top surface of the lifting pressing plate (13) in the series gap (23) Zhou Cewei, adjacent groups of positive electrode contacts (21) and negative electrode contacts (22) are arranged in the same insulating partition wall (71), a positive electrode opening (72) through which the positive electrode contact (41) passes is formed in one side, close to the positive electrode plate (4), of the insulating partition wall (71), and a negative electrode opening (73) through which the negative electrode contact (51) passes is formed in one side, close to the negative electrode plate (5).
5. The auxiliary wiring device for batch verification of transformers according to claim 4, wherein the positive electrode plate (4) is provided with a positive electrode insulation stop (74) which is embedded into the positive electrode notch (72) and is matched with the positive electrode insulation stop at one side of the positive electric contact (41) close to the insulation partition wall (71), the negative electrode plate (5) is provided with a negative electrode insulation stop (75) which is embedded into the negative electrode notch (73) and is matched with the negative electrode notch (73) at one side of the negative electric contact (51) close to the insulation partition wall (71), and the positive electrode insulation stop (74) and the negative electrode insulation stop (75) are arranged in a staggered mode;
when the positive plate (4) and the negative plate (5) are moved into position, the positive insulation block (74) and the negative electrode are in insulation engagement and isolate the positive electrical contact (41) from the negative electrical contact (51).
6. Auxiliary wiring device for batch verification of transformers according to claim 4, characterized in that the positive electrical contact (41) and the negative electrical contact (51) are made of reeds, and the lifting press plate (13) is provided with scraping members (76) for scraping the positive electrical contact (41) or the negative electrical contact (51) at the positive and negative cutouts (72, 73).
7. The auxiliary wiring device for batch verification of mutual inductors according to any one of claims 1 to 6, wherein a detection contact (81) is installed on a movable head of the elastic thimble (3) in an insulating manner, a plurality of detection plates (82) corresponding to the four elastic thimbles (3) in the same group are installed on the side of the rack (12), and a detection mechanism for detecting the abutting degree of the elastic thimble (3) and a secondary side wiring terminal of the mutual inductor is arranged on the detection plates (82).
8. The auxiliary wiring device for batch verification of mutual inductors according to claim 7, wherein the detection mechanism comprises a detection loop (83) arranged on the detection plate (82) and a feedback element connected in series in the detection loop (83), and a circuit breaking part (84) is arranged at a position of the detection loop (83) corresponding to the detection contact (81); when the elastic thimble (3) is pushed by the secondary side connecting terminal of the transformer to move reversely, the detection contact (81) is connected with the breaking part (84).
9. The auxiliary wiring device for batch verification of transformers according to claim 8, wherein an insulating seat (85) is fixedly connected to a movable head of the elastic thimble (3), an adjusting bolt (86) axially arranged along the elastic thimble (3) is threaded on the insulating seat (85), and the detecting contact (81) is mounted at the free end of the adjusting bolt (86).
10. Auxiliary wiring device for batch verification of transformers according to claim 8, characterized in that a plurality of said elastic pins (3) are commonly connected with a side plate (15), a linear driving member (16) for driving said side plate (15) to approach said conveyor belt (11) is arranged on said frame (12), and said linear driving member (16) is in control connection with said feedback element.
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| CN202310589383.XA CN116699190B (en) | 2023-05-19 | 2023-05-19 | Auxiliary wiring device for batch verification of mutual inductors |
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| CN202310589383.XA CN116699190B (en) | 2023-05-19 | 2023-05-19 | Auxiliary wiring device for batch verification of mutual inductors |
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| CN215953834U (en) * | 2021-08-17 | 2022-03-04 | 国网四川省电力公司成都供电公司 | Punching current transformer batch detection device |
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| JP2009031187A (en) * | 2007-07-30 | 2009-02-12 | Fuji Electric Systems Co Ltd | Method and device for measuring insulation resistance |
| CN106842096A (en) * | 2017-01-22 | 2017-06-13 | 国网山东省电力公司潍坊供电公司 | Auxiliary connection device is used in high-tension current inductor batch calibrating |
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