10KV voltage transformer

Abstract

The invention discloses a 10KV voltage transformer, and belongs to the technical field of transformers. Comprising an insulating shell, a winding assembly and a driving assembly installed in a supporting assembly, and the insulating shell wraps the outer side of the winding assembly; the winding assembly comprises an iron core, a plurality of secondary windings wound on the iron core and a primary winding wound on the iron core; the secondary winding comprises a first winding, a second winding and a third winding, the A end of the first winding is connected with the a end of the wiring end installed on the supporting assembly, and the N end of the first winding is installed at the output end of the driving assembly. The output end of the driving assembly controls the N end of the first winding to move and is connected with the A end of the second winding or the third winding, and meanwhile controls the N end of the second winding or the third winding to be connected with the n end of the wiring end, so that the first winding and the second winding or the third winding are connected in series to adjust voltage.

Description

Technical Field

[0001] The present invention relates to the technical field of mutual inductors, and more specifically, to a 10KV voltage mutual inductor. Background Art

[0002] After the existing 10KV voltage transformer is produced, the turns ratio of its primary winding and secondary winding is fixed. Therefore, when a stable voltage is input to the primary winding side, the voltage output on the secondary winding side is also a fixed voltage value. The secondary winding is often connected to different measuring instruments, relay protection devices or automatic devices. When the measuring instrument, relay protection device or automatic device is updated or replaced, its working voltage may change. The original voltage transformer cannot provide a matching working voltage, which leads to the need to replace the voltage transformer synchronously, increasing the update and maintenance costs. In view of this, we propose a 10KV voltage transformer. Summary of the invention

[0003] The object of the present invention is to provide a 10KV voltage transformer, which is used to solve the technical problem in the prior art that the original voltage transformer cannot provide a matching working voltage when updating or replacing a measuring instrument, a relay protection device or an automatic device.

[0004] The embodiment of the present invention provides a 10KV voltage transformer, comprising an insulating housing, a winding assembly, and a driving assembly installed in a supporting assembly, wherein the insulating housing is coated on the outside of the winding assembly;

[0005] The winding assembly comprises an iron core, a plurality of secondary windings wound on the iron core and a primary winding wound on the iron core;

[0006] The secondary winding includes a first winding, a second winding and a third winding, the A end of the first winding is connected to the a end of the terminal installed on the support component, and the N end of the first winding is installed at the output end of the driving component;

[0007] The output end of the driving component controls the N end of the first winding to move and connect to the A end of the second winding or the third winding, and at the same time controls the N end of the second winding or the third winding to connect to the n end of the connection terminal, so that the first winding is connected in series with the second winding or the third winding to adjust the voltage.

[0008] As a further description of the above technical solution, the first winding and the primary winding are both wound on the primary side of the iron core, the second winding and the third winding are wound on the secondary side of the iron core, and electrical isolation is provided between any two of the secondary winding, the iron core and the primary winding.

[0009] As a further description of the above technical solution, the outer side of the iron core is coated with a coating tape, the inner and outer sides of the first winding, the second winding, the third winding and the primary winding are all wound with an insulating layer, and a skeleton for supporting the primary winding is also provided between the first winding and the primary winding, and a copper sheet is wound on the outer side of the skeleton;

[0010] A rubber belt is wound around the outer side of the covering belt on the iron core, a rubber body is filled between the secondary winding and the primary winding, and both ends of the primary winding are connected to the corresponding high-voltage access end inserts through copper braided belts.

[0011] As a further description of the above technical solution, the driving assembly includes a motor fixedly installed in the supporting assembly and a third insulating frame, the output shaft of the motor is fixedly connected to a screw rod, the screw rod is rotatably connected to the supporting box, the screw rod is threaded with a slider slidably connected to the supporting assembly, an adjusting block is fixedly installed on the slider, a fifth guide rod slidably connected to the adjusting block is fixedly installed on the third insulating frame, an eighth elastic member is mounted on the fifth guide rod, one end of the eighth elastic member is fixedly connected to the adjusting block, and the other end is fixedly connected to the third insulating frame, a first electromagnet is fixedly installed on the adjusting block, and a second electromagnet is fixedly installed on the third insulating frame.

[0012] As a further description of the above technical solution, the voltage transformer also includes a conductive bar assembly, the conductive bar assembly includes a first conductive bar, a second conductive bar, a third conductive bar, a fourth conductive bar, a fifth conductive bar and a conductive bar frame, the second conductive bar, the fourth conductive bar and the conductive bar frame are all fixedly mounted on the support assembly through an insulating block, and the first conductive bar is fixedly mounted on the third insulating frame;

[0013] The tail end of the conductive row frame is connected to the n-end of the terminal through a copper braided belt, a first insulating frame is fixedly installed on the third conductive row, a plurality of third guide rods are fixedly installed on the first insulating frame, the third guide rods pass through the second conductive row and the insulating blocks on the conductive row frame and are slidably connected to the support box, and a second insulating frame is fixedly installed on the fifth conductive row;

[0014] A plurality of fourth guide rods are fixedly mounted on the second insulating frame, and the fourth guide rods pass through the fourth conductive row and the insulating blocks on the conductive row frame and are slidably connected to the support assembly;

[0015] The N end of the first winding is connected to the first conductive bar through a copper braided belt, the A end of the second winding is connected to the second conductive bar through a copper braided belt, the N end of the second winding is connected to the third conductive bar through a copper braided belt, the A end of the third winding is connected to the fourth conductive bar through a copper braided belt, and the N end of the third winding is connected to the fifth conductive bar through a copper braided belt.

[0016] As a further description of the above technical solution, the thickness of the first insulating frame is less than the thickness of the third conductive bar, and the thickness of the second insulating frame is less than the thickness of the fifth conductive bar;

[0017] The length of the third guide rod passing through the second conductive row is equal to the distance between the third conductive row and the conductive row frame, and the length of the fourth guide rod passing through the fourth conductive row is equal to the distance between the fifth conductive row and the conductive row frame.

[0018] As a further description of the above technical solution, the conductive bar assembly also includes a sixth conductive bar, which is fixedly installed in the support assembly through an insulating block, and the third guide rod passes through the insulating block of the sixth conductive bar. The third guide rod is provided with a plurality of third elastic members and a plurality of fourth elastic members, one end of the third elastic member is fixedly connected to the first insulating frame, and the other end is fixedly connected to the insulating block on the conductive bar frame, and one end of the fourth elastic member is fixedly connected to the first insulating frame, and the other end is fixedly connected to the insulating block on the sixth conductive bar;

[0019] The fourth guide rod is sleeved with a fifth elastic member, one end of the fifth elastic member is fixedly connected to the second insulating frame, and the other end of the fifth elastic member is fixedly connected to the insulating block on the conductive rack.

[0020] As a further description of the above technical solution, the conductive bar assembly also includes a top plate, which is slidably connected to the fourth guide rod, and an insulating plate is slidably connected to the top plate, and the insulating plate is elastically connected to the top plate through a sixth elastic member, and the insulating plate is slidably connected to the fourth guide rod, and a seventh conductive bar is fixedly installed on the side of the insulating plate away from the top plate, and the seventh conductive bar is connected to the sixth conductive bar through a copper braided belt, and a seventh elastic member is mounted on the fourth guide rod, and one end of the seventh elastic member is fixedly connected to the insulating plate, and the other end is fixedly connected to the insulating block on the fourth conductive bar.

[0021] As a further description of the above technical solution, the support assembly includes a support box fixed to the bottom of the insulating shell, a plurality of first guide rods fixedly installed in the support box, and a support plate slidably connected to the first guide rods, a first elastic member is mounted on the first guide rod, one end of the first elastic member is fixedly connected to the support plate, and the other end is fixedly connected to the support box, and a first push-out assembly, a second push-out assembly and a third push-out assembly are fixedly installed on the support plate for pushing the corresponding conductive row to move;

[0022] The first ejection assembly comprises a support block and a second elastic member, wherein an inclined block is slidably connected inside the support block, one end of the second elastic member is fixedly connected to the support block, and the other end is fixedly connected to the inclined block;

[0023] The second ejection assembly and the third ejection assembly have the same structure as the first ejection assembly.

[0024] As a further description of the above technical solution, the voltage transformer also includes a lifting assembly, which includes a lifting block and a third electromagnet. The lifting block is slidably connected to the third insulating frame through a guide column, and a ninth elastic member is mounted on the guide column. One end of the ninth elastic member is fixedly connected to the third insulating frame, and the other end is fixedly connected to the lifting block. The third electromagnet is fixedly installed at the bottom of the third insulating frame, and a fourth electromagnet is fixedly installed on the lifting block.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] 1. The present invention controls the N end of the first winding to be connected to the connection terminal n or the A end of the second winding or the third winding through a driving component, thereby realizing different voltage outputs on the secondary side and improving the regulation of different voltage modes of the voltage transformer.

[0027] 2. When the lifting assembly and the driving assembly work together, the present invention can also realize the simultaneous series connection of the first winding, the second winding and the third winding, thereby further increasing the output voltage.

[0028] 3. In the present invention, when the winding assembly or other working parts of the voltage transformer overheat or other faults occur, the driving assembly can control the N end of the first winding to disconnect, thereby avoiding the occurrence of safety accidents and improving the safety of the voltage transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of a 10KV voltage transformer disclosed in a preferred embodiment of the present invention;

[0030] Figure 2 A cross-sectional view of a 10KV voltage transformer disclosed in a preferred embodiment of the present invention;

[0031] Figure 3 A 10KV voltage transformer disclosed in a preferred embodiment of the present invention Figure 2 Enlarged view of point B in the middle;

[0032] Figure 4 A partial structural schematic diagram of a 10KV voltage transformer disclosed in a preferred embodiment of the present invention;

[0033] Figure 5 A schematic diagram of a support plate connection structure of a 10KV voltage transformer disclosed in a preferred embodiment of the present invention;

[0034] Figure 6 A schematic diagram of a third guide rod connection structure of a 10KV voltage transformer disclosed in a preferred embodiment of the present invention;

[0035] Figure 7A cross-sectional view of the entire first ejection assembly of a 10KV voltage transformer disclosed in a preferred embodiment of the present invention;

[0036] Figure 8 A schematic diagram of a conductive rack structure of a 10KV voltage transformer disclosed in a preferred embodiment of the present invention;

[0037] Fig. 9 A schematic diagram of a fourth guide rod connection structure of a 10KV voltage transformer disclosed in a preferred embodiment of the present invention;

[0038] Fig.10 The present invention is a schematic diagram of a driving component connection structure of a 10KV voltage transformer disclosed in a preferred embodiment of the present invention.

[0039] Explanation of the reference numerals in the figure: 1. Insulating shell; 2. Winding assembly; 3. Support assembly; 4. Conductive row assembly; 5. Driving assembly; 6. Lifting assembly; 21. Iron core; 22. Secondary winding; 23. Primary winding; 24. Covering belt; 25. Insulating layer; 26. Frame; 27. Copper sheet; 28. Rubber belt; 29. ​​Rubber body; 31. Support box; 32. First guide rod; 33. Support plate; 34. First elastic member; 35. First ejecting assembly; 36. Second ejecting assembly; 37. Third ejecting assembly; 41. First conductive row; 42. Second conductive row; 43. Third conductive row; 44. Fourth conductive row; 45. Fifth conductive row; 46. Conductive row frame; 48. First insulating frame; 49. Third guide rod; 51 , motor; 52, screw rod; 53, slider; 54, adjustment block; 55, third insulating frame; 56, fifth guide rod; 57, eighth elastic member; 58, first electromagnet; 59, second electromagnet; 61, top block; 62, ninth elastic member; 63, third electromagnet; 64, fourth electromagnet; 65, limit block; 351, support block; 352, inclined block; 353, second guide rod; 354, second elastic member; 410, second insulating frame; 411, fourth guide rod; 412, sixth conductive bar; 413, top plate; 414, third elastic member; 415, fourth elastic member; 416, insulating plate; 417, sixth elastic member; 418, seventh conductive bar; 419, seventh elastic member; 420, fifth elastic member. DETAILED DESCRIPTION

[0040] 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.

[0041] Reference Figures 1 to 10This embodiment discloses a 10KV voltage transformer, including an insulating housing 1 and a winding assembly 2. The insulating housing 1 is coated on the winding assembly 2 by casting. The winding assembly 2 includes an iron core 21, a plurality of secondary windings 22 and a primary winding 23.

[0042] In this embodiment, the secondary winding 22 is provided with three groups, namely the first winding, the second winding and the third winding. The first winding and the primary winding 23 are both wound on the primary side of the iron core 21, and the second winding and the third winding are wound on the secondary side of the iron core 21. The number of turns of the first winding, the second winding and the third winding can be the same or different, and can be set according to the commonly used voltage. The outer side of the iron core 21 is coated with a coating tape 24 to protect the iron core 21, improve the insulation of the iron core 21 and reduce electromagnetic interference. The first winding, the second winding The inner and outer sides of the first winding, the third winding and the primary winding 23 are all wound with an insulating layer 25. A skeleton 26 for supporting the primary winding 23 is also provided between the first winding and the primary winding 23. The skeleton 26 is formed by two groups of arc blocks plugged and assembled with each other. A copper sheet 27 is wound on the outer side of the skeleton 26 to improve the efficiency of the mutual inductor and realize the safe isolation of the primary winding 23 and the secondary winding 22. The covering tape 24, the plurality of insulating layers 25, the secondary winding 22, the skeleton 26, the copper sheet 27 and the primary winding 23 are arranged according to Figure 3 The order from inside to outside is arranged in sequence. The electrical isolation between any two of the secondary winding 22, the iron core 21 and the primary winding 23 can be achieved by setting the insulating layer 25. The outer side of the covering belt 24 on the iron core 21 is wound with a rubber belt 28. The secondary side secondary winding 22 and the primary winding 23 are filled with a rubber body 29. The rubber belt 28 and the rubber body 29 can reduce the risk of deformation or displacement of the iron core 21, the secondary winding 22 and the primary winding 23 due to factors such as casting pressure during casting. The two ends of the primary winding 23 are connected to the corresponding high-voltage access end inserts through copper braided belts. It should be noted that the secondary winding 22 can also be more than three groups.

[0043] Reference Figure 1 , Figure 2 , Figures 4 to 7 A support assembly 3 is installed at the bottom of the insulating shell 1, and the support assembly 3 includes a support box 31 fixed to the bottom of the insulating shell 1, a plurality of first guide rods 32 fixedly installed in the support box 31, and a support plate 33 slidably connected to the first guide rods 32. A first elastic member 34 is mounted on the first guide rod 32, one end of the first elastic member 34 is fixedly connected to the support plate 33, and the other end is fixedly connected to the support box 31. A first ejection assembly 35, a second ejection assembly 36 and a third ejection assembly 37 are fixedly installed on the support plate 33.

[0044] The first ejection assembly 35 includes a support block 351, in which an inclined block 352 is slidably connected, and the sliding range of the inclined block 352 does not exceed the support block 351. A plurality of second guide rods 353 slidably connected to the inclined block 352 are fixedly installed on the support block 351, and a second elastic member 354 is mounted on the second guide rod 353, one end of the second elastic member 354 is fixedly connected to the support block 351, and the other end is fixedly connected to the inclined block 352. The second ejection assembly 36 and the third ejection assembly 37 have the same structure as the first ejection assembly 35, and the protruding direction of the inclined block 352 of the second ejection assembly 36 is the same as that of the inclined block 352 on the first ejection assembly 35, and the protruding direction of the inclined block 352 of the third ejection assembly 37 is opposite to that of the inclined block 352 on the first ejection assembly 35. The support box 31 is equipped with a wiring terminal, including an a terminal and an n terminal, and the A terminal of the first winding is connected to the a terminal through a copper braided belt.

[0045] Reference Figure 2 , Figure 4 , Figure 6 , Figures 8 to 10 The voltage transformer also includes a conductive bar assembly 4, which includes a first conductive bar 41, a second conductive bar 42, a third conductive bar 43, a fourth conductive bar 44, a fifth conductive bar 45 and a conductive bar frame 46. The second conductive bar 42, the fourth conductive bar 44 and the conductive bar frame 46 are all fixedly mounted on the support box 31 through insulating blocks. The tail end of the conductive bar frame 46 is connected to the n end of the terminal through a copper braided belt. A first insulating frame 48 is fixedly mounted on the third conductive bar 43. The thickness of the first insulating frame 48 is less than that of the third conductive bar 43, thereby ensuring the reliability of the conductive bar when in contact. A plurality of third guide rods 49 are fixedly mounted on the first insulating frame 48. The third guide rods 49 pass through the second conductive bar 4 2 and the insulating blocks on the conductive rack 46 are slidably connected to the support box 31, the length of the third guide rod 49 passing through the second conductive row 42 is equal to the distance between the third conductive row 43 and the conductive rack 46, a second insulating frame 410 is fixedly installed on the fifth conductive row 45, the thickness of the second insulating frame 410 is less than the thickness of the fifth conductive row 45, ensuring the reliability of the conductive row when in contact, a plurality of fourth guide rods 411 are fixedly installed on the second insulating frame 410, the fourth guide rods 411 pass through the fourth conductive row 44 and the insulating blocks on the conductive rack 46 and are slidably connected to the support box 31, and the length of the fourth guide rod 411 passing through the fourth conductive row 44 is equal to the distance between the fifth conductive row 45 and the conductive rack 46.

[0046] The N end of the first winding is connected to the first conductive bar 41 through a copper braided belt, the A end of the second winding is connected to the second conductive bar 42 through a copper braided belt, the N end of the second winding is connected to the third conductive bar 43 through a copper braided belt, the A end of the third winding is connected to the fourth conductive bar 44 through a copper braided belt, and the N end of the third winding is connected to the fifth conductive bar 45 through a copper braided belt.

[0047] The conductive bar assembly 4 also includes a sixth conductive bar 412 and a top plate 413. The sixth conductive bar 412 is fixedly installed in the support box 31 through an insulating block. The third guide rod 49 passes through the insulating block of the sixth conductive bar 412. The third guide rod 49 is provided with a plurality of third elastic members 414 and a plurality of fourth elastic members 415. One end of the third elastic member 414 is fixedly connected to the first insulating frame 48, and the other end is fixedly connected to the insulating block on the conductive bar frame 46. One end of the fourth elastic member 415 is fixedly connected to the first insulating frame 48, and the other end is fixedly connected to the insulating block on the sixth conductive bar 412. Through the arrangement of the third elastic member 414 and the fourth elastic member 415, the third conductive bar 43 is not in contact with the conductive bar frame 46 and the sixth conductive bar 412. When the first pushing assembly 35 rises, the corresponding inclined block 352 pushes the first insulating frame 48 to move and drives the third conductive bar 43. The fourth elastic member 415 is compressed, and the third elastic member 414 is stretched until the third conductive bar 43 is in contact with the sixth conductive bar 412.

[0048] A fifth elastic member 420 is mounted on the fourth guide rod 411. One end of the fifth elastic member 420 is fixedly connected to the second insulating frame 410, and the other end is fixedly connected to the insulating block on the conductive row frame 46. When the second pushing assembly 36 rises, the corresponding inclined block 352 pushes the second insulating frame 410 to move and drives the fifth conductive row 45 to move. The fifth elastic member 420 is compressed until the fifth conductive row 45 contacts the conductive row frame 46.

[0049] The top plate 413 is slidably connected to the fourth guide rod 411, and the support block 351 of the third push-up assembly 37 is used to limit the top plate 413. An insulating plate 416 is slidably connected to the top plate 413, and the insulating plate 416 is elastically connected to the top plate 413 through a sixth elastic member 417. The insulating plate 416 is slidably connected to the fourth guide rod 411, and a seventh conductive row 418 is fixedly installed on the side of the insulating plate 416 away from the top plate 413. The seventh conductive row 418 is connected to the sixth conductive row 412 through a copper braided belt, and a seventh elastic member 419 is mounted on the fourth guide rod 411, and one end of the seventh elastic member 419 is fixedly connected to the insulating plate 416, and the other end is fixedly connected to the insulating block on the fourth conductive row 44. When the third pushing assembly 37 rises, the corresponding inclined block 352 rises to push the top plate 413 , and the top plate 413 pushes the insulating plate 416 and the seventh conductive bar 418 to move through the sixth elastic member 417 , and the seventh elastic member 419 is compressed until the seventh conductive bar 418 contacts the fourth conductive bar 44 .

[0050] Reference Figure 2 , Figure 4 and Fig.10A driving assembly 5 is installed in the support box 31. The driving assembly 5 includes a motor 51 and a third insulating frame 55 fixedly installed in the support box 31. The first conductive row 41 is fixedly installed on the third insulating frame 55. The output shaft of the motor 51 is fixedly connected with a screw rod 52. The screw rod 52 is rotatably connected to the support box 31. The screw rod 52 is threaded with a slider 53 slidably connected to the support box 31. An adjusting block 54 is fixedly installed on the slider 53. A fifth guide rod 56 slidably connected to the adjusting block 54 is fixedly installed on the third insulating frame 55. An eighth elastic member 57 is sleeved on the fifth guide rod 56. One end of the eighth elastic member 57 is fixedly connected to the adjusting block 54, and the other end is fixedly connected to the third insulating frame 55. The eighth elastic member 57 is used to push the third insulating frame 55 away from the adjusting block 54. A first electromagnet 58 is fixedly installed on the adjusting block 54, and a second electromagnet 59 is fixedly installed on the third insulating frame 55. When a positive current is passed through the first electromagnet 58 and the second electromagnet 59, the second electromagnet 59 is magnetically attracted by the first electromagnet 58, and the third insulating frame 55 and the first conductive bar 41 move toward the adjustment block 54 and compress the eighth elastic member 57; when a reverse current is passed through the first electromagnet 58 and the second electromagnet 59, the second electromagnet 59 and the first electromagnet 58 repel each other, and the third insulating frame 55 and the first conductive bar 41 move away from the adjustment block 54. The elastic force of the eighth elastic member 57 is greater than the sum of the elastic forces of the elastic members on the third guide rod 49 or the fourth guide rod 411, thereby ensuring that the third insulating frame 55 can stably push the third guide rod 49 or the fourth guide rod 411 to move.

[0051] A lifting assembly 6 is installed at the bottom of the third insulating frame 55, and the lifting assembly 6 includes a lifting block 61 and a third electromagnet 63. The lifting block 61 is slidably connected to the third insulating frame 55 through a guide column, and a ninth elastic member 62 is mounted on the guide column. One end of the ninth elastic member 62 is fixedly connected to the third insulating frame 55, and the other end is fixedly connected to the lifting block 61. The third electromagnet 63 is fixedly installed at the bottom of the third insulating frame 55, and a fourth electromagnet 64 is fixedly installed on the lifting block 61. A limit block 65 is fixedly installed on the lifting block 61. When the third electromagnet 63 and the fourth electromagnet 64 are connected to the forward current, a repulsive force is generated, the top block 61 moves down to the set height, and the ninth elastic member 62 is stretched. When the third electromagnet 63 and the fourth electromagnet 64 are connected to the reverse current, a magnetic attraction is generated, and the top block 61 moves up until the limit block 65 presses against the bottom of the third insulating frame 55. The ninth elastic member 62 is used to keep the limit block 65 press against the bottom of the third insulating frame 55. When the limit block 65 presses against the bottom of the third insulating frame 55, the height of the top block 61 is greater than the height of the support plate 33. The elastic force of the ninth elastic member 62 is greater than the sum of the elastic forces of the first elastic members 34. When the top block 61 moves to the lower side of the support plate 33, it can be ensured that the support plate 33 moves up under the drive of the ninth elastic member 62.

[0052] Working principle: when only the first winding needs to work, the first electromagnet 58 and the second electromagnet 59 pass forward current to generate magnetic attraction, the second electromagnet 59 drives the third insulating frame 55 and the first conductive row 41 to move to the side of the adjustment block 54 and compresses the eighth elastic member 57, the output shaft of the motor 51 drives the screw 52 to rotate, thereby driving the slider 53, the adjustment block 54, the third insulating frame 55 and the first conductive row 41 to move to the conductive row frame 46, the first electromagnet 58 and the second electromagnet 59 stop working or pass forward current to generate repulsion, under the action of the eighth elastic member 57 and the repulsive force, the first conductive row 41 is close to the conductive row frame 46, at this time, the N end of the first winding is connected to the n end of the terminal through the conductive row frame 46 and the copper braided belt.

[0053] When the output voltage of the transformer needs to be changed, according to the operating principle of the first winding, the first conductive bar 41 is moved to the corresponding position of the second conductive bar 42 and is close to the second conductive bar 42. At the same time, the third insulating frame 55 pushes the third guide rod 49 to drive the third conductive bar 43 to move and close to the conductive bar frame 46. At this time, the N end of the first winding is connected to the A end of the second winding, and the N end of the second winding is connected to the n end of the terminal through the conductive bar frame 46 and the copper braided belt to increase the number of turns on the secondary side, thereby adjusting the output voltage. The working principle of the first winding and the third winding is the same as the working principle of the first winding and the second winding. The first conductive bar 41 can be moved to correspond to the position of the fourth conductive bar 44, which will not be repeated here.

[0054] When the first winding, the second winding and the third winding need to work at the same time, the third electromagnet 63 and the fourth electromagnet 64 are energized to generate a repulsive force, so that the height of the top block 61 is lower than the height of the support plate 33, and the ninth elastic member 62 is stretched and driven when the first winding and the second winding work together to move the first conductive row 41 to the corresponding position of the second conductive row 42. The width of the second conductive row 42 is greater than the width of the first conductive row 41. At this time, the third insulating frame 55 is on one side of the third guide rod 49 and will not contact the third guide rod 49. The top block 61 is directly below the support plate 33. The third electromagnet 63 and the fourth electromagnet 64 stop working or are connected to a reverse current to generate a magnetic attraction. Under the action of the magnetic attraction of the ninth elastic member 62, the top block 61 drives the support plate 33 to move upward, and the first pusher 41 is pushed upward. The top assembly 35, the second pushing assembly 36 and the third pushing assembly 37 move upward accordingly, the inclined block 352 of the first pushing assembly 35 pushes the first insulating frame 48 to make the third conductive row 43 abut against the sixth conductive row 412, the inclined block 352 of the second pushing assembly 36 pushes the second insulating frame 410 to make the fifth conductive row 45 abut against the conductive row frame 46, and the inclined block 352 of the third pushing assembly 37 pushes the top plate 413 and the insulating plate 416 to move, so that the seventh conductive row 418 abuts against the fourth conductive row 44. At this time, the N end of the first winding is connected to the A end of the second winding, the N end of the second winding is connected to the A end of the third winding, the N end of the third winding abuts against the conductive row frame 46 and is connected to the n end of the terminal through the copper braid, thereby realizing the coordinated work of the first winding, the second winding and the third winding.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A 10KV voltage transformer, characterized in that: It comprises an insulating housing (1), a winding assembly (2) and a driving assembly (5) installed in a supporting assembly (3), wherein the insulating housing (1) is wrapped around the outside of the winding assembly (2); The winding assembly (2) comprises an iron core (21), a plurality of secondary windings (22) wound on the iron core (21), and a primary winding (23) wound on the iron core (21); The secondary winding (22) comprises a first winding, a second winding and a third winding, the A end of the first winding is connected to the a end of the connection terminal installed on the support component (3), and the N end of the first winding is installed at the output end of the drive component (5); The output end of the driving component (5) controls the N end of the first winding to move and connect to the A end of the second winding or the third winding, and controls the N end of the second winding or the third winding to connect to the n end of the connection terminal, so that the first winding is connected in series with the second winding or the third winding to adjust the voltage.

2. A 10KV voltage transformer according to claim 1, characterized in that: The first winding and the primary winding (23) are both wound on the primary side of the iron core (21), the second winding and the third winding are wound on the secondary side of the iron core (21), and electrical isolation is provided between any two of the secondary winding (22), the iron core (21) and the primary winding (23).

3. A 10KV voltage transformer according to claim 2, characterized in that: The outer side of the iron core (21) is coated with a coating tape (24); the inner and outer sides of the first winding, the second winding, the third winding and the primary winding (23) are all wound with an insulating layer (25); a frame (26) for supporting the primary winding (23) is provided between the first winding and the primary winding (23); and a copper sheet (27) is wound on the outer side of the frame (26); A rubber belt (28) is wound around the outer side of the covering belt (24) on the iron core (21), a rubber body (29) is filled between the secondary winding (22) and the primary winding (23), and both ends of the primary winding (23) are connected to corresponding high-voltage access end inserts via copper braided belts.

4. A 10KV voltage transformer according to claim 1, characterized in that: The driving assembly (5) comprises a motor (51) and a third insulating frame (55) fixedly mounted in the supporting assembly (3); the output shaft of the motor (51) is fixedly connected to a screw rod (52); the screw rod (52) is rotatably connected to the supporting box (31); a slider (53) slidably connected to the supporting assembly (3) is threadedly matched on the screw rod (52); an adjusting block (54) is fixedly mounted on the slider (53); a fifth guide rod (56) slidably connected to the adjusting block (54) is fixedly mounted on the third insulating frame (55); an eighth elastic member (57) is sleeved on the fifth guide rod (56); one end of the eighth elastic member (57) is fixedly connected to the adjusting block (54) and the other end is fixedly connected to the third insulating frame (55); a first electromagnet (58) is fixedly mounted on the adjusting block (54); and a second electromagnet (59) is fixedly mounted on the third insulating frame (55).

5. A 10KV voltage transformer according to claim 4, characterized in that: The voltage transformer also includes a conductive bar assembly (4), the conductive bar assembly (4) including a first conductive bar (41), a second conductive bar (42), a third conductive bar (43), a fourth conductive bar (44), a fifth conductive bar (45) and a conductive bar frame (46), the second conductive bar (42), the fourth conductive bar (44) and the conductive bar frame (46) are all fixedly mounted on the support assembly (3) via insulating blocks, and the first conductive bar (41) is fixedly mounted on the third insulating frame (55); The tail end of the conductive rack (46) is connected to the n-end of the connection terminal via a copper braided belt; a first insulating rack (48) is fixedly mounted on the third conductive row (43); a plurality of third guide rods (49) are fixedly mounted on the first insulating rack (48); the third guide rods (49) pass through the insulating blocks on the second conductive row (42) and the conductive rack (46) and are slidably connected to the support box (31); and a second insulating rack (410) is fixedly mounted on the fifth conductive row (45); A plurality of fourth guide rods (411) are fixedly mounted on the second insulating frame (410), and the fourth guide rods (411) pass through the fourth conductive row (44) and the insulating blocks on the conductive row frame (46) and are slidably connected to the support assembly (3); The N end of the first winding is connected to the first conductive bar (41) through a copper braided belt, the A end of the second winding is connected to the second conductive bar (42) through a copper braided belt, the N end of the second winding is connected to the third conductive bar (43) through a copper braided belt, the A end of the third winding is connected to the fourth conductive bar (44) through a copper braided belt, and the N end of the third winding is connected to the fifth conductive bar (45) through a copper braided belt.

6. A 10KV voltage transformer according to claim 5, characterized in that: The thickness of the first insulating frame (48) is smaller than the thickness of the third conductive row (43), and the thickness of the second insulating frame (410) is smaller than the thickness of the fifth conductive row (45); The length of the third guide rod (49) passing through the second conductive row (42) is equal to the distance between the third conductive row (43) and the conductive row frame (46), and the length of the fourth guide rod (411) passing through the fourth conductive row (44) is equal to the distance between the fifth conductive row (45) and the conductive row frame (46).

7. A 10KV voltage transformer according to claim 5, characterized in that: The conductive bar assembly (4) further comprises a sixth conductive bar (412), the sixth conductive bar (412) being fixedly mounted in the support assembly (3) via an insulating block, the third guide rod (49) passing through the insulating block of the sixth conductive bar (412), the third guide rod (49) being sleeved with a plurality of third elastic members (414) and a plurality of fourth elastic members (415), one end of the third elastic member (414) being fixedly connected to the first insulating frame (48), and the other end being fixedly connected to the insulating block on the conductive bar frame (46), one end of the fourth elastic member (415) being fixedly connected to the first insulating frame (48), and the other end being fixedly connected to the insulating block on the sixth conductive bar (412); The fourth guide rod (411) is sleeved with a fifth elastic member (420), one end of the fifth elastic member (420) is fixedly connected to the second insulating frame (410), and the other end is fixedly connected to the insulating block on the conductive rack (46).

8. A 10KV voltage transformer according to claim 7, characterized in that: The conductive bar assembly (4) further comprises a top plate (413), the top plate (413) being slidably connected to a fourth guide rod (411), an insulating plate (416) being slidably connected to the top plate (413), the insulating plate (416) being elastically connected to the top plate (413) via a sixth elastic member (417), the insulating plate (416) being slidably connected to the fourth guide rod (411), a seventh conductive bar (418) being fixedly mounted on a side of the insulating plate (416) away from the top plate (413), the seventh conductive bar (418) being connected to the sixth conductive bar (412) via a copper braided belt, a seventh elastic member (419) being sleeved on the fourth guide rod (411), one end of the seventh elastic member (419) being fixedly connected to the insulating plate (416), and the other end being fixedly connected to an insulating block on the fourth conductive bar (44).

9. A 10KV voltage transformer according to claim 8, characterized in that: The support assembly (3) comprises a support box (31) fixed to the bottom of the insulating housing (1), a plurality of first guide rods (32) fixedly installed in the support box (31) and a support plate (33) slidably connected to the first guide rods (32); a first elastic member (34) is mounted on the first guide rods (32); one end of the first elastic member (34) is fixedly connected to the support plate (33) and the other end is fixedly connected to the support box (31); a first push-up assembly (35), a second push-up assembly (36) and a third push-up assembly (37) are fixedly installed on the support plate (33) for pushing the corresponding conductive row to move; The first ejection assembly (35) comprises a support block (351) and a second elastic member (354); a slanting block (352) is slidably connected inside the support block (351); one end of the second elastic member (354) is fixedly connected to the support block (351), and the other end is fixedly connected to the slanting block (352); The second ejection assembly (36) and the third ejection assembly (37) have the same structure as the first ejection assembly (35).

10. A 10KV voltage transformer according to claim 9, characterized in that: The voltage transformer also includes a lifting assembly (6), the lifting assembly (6) including a lifting block (61) and a third electromagnet (63), the lifting block (61) being slidably connected to the third insulating frame (55) via a guide column, a ninth elastic member (62) being sleeved on the guide column, one end of the ninth elastic member (62) being fixedly connected to the third insulating frame (55), and the other end being fixedly connected to the lifting block (61), the third electromagnet (63) being fixedly mounted on the bottom of the third insulating frame (55), and a fourth electromagnet (64) being fixedly mounted on the lifting block (61).

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