New energy medium-voltage transformer

Abstract

The invention relates to the technical field of mutual inductors, in particular to a new energy medium-voltage mutual inductor which at least comprises a mutual inductor shell, a fixed contact, a sliding contact plate, a short circuit assembly and an action assembly. The mutual inductor shell at least comprises a circular ring upper part, a wiring lower part and the like; the fixed contact is arranged below the rectangular main cavity; the sliding contact plate is connected with the fixed contact in a normal state; the short circuit assembly moves leftwards to contact the sliding contact plate in the initial stage to achieve short circuit, and the second short circuit assembly moves rightwards along with the sliding contact plate to enable the fixed contact to be disconnected from the sliding contact plate in the second stage. The new energy medium-voltage mutual inductor is a current mutual inductor and is connected with the mutual inductor coil through the sliding contact of the sliding contact plate, the sliding contact is connected with the fixed contact and an electricity meter in a normal state, and the purpose of measuring current is achieved. According to the new energy medium-voltage transformer, the short circuit assembly is provided for achieving temporary short circuit.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to a new energy medium-voltage transformer. Background Art

[0002] A current transformer is a device used to convert large currents into small currents. It is widely used in power systems, industrial control, measuring instruments, and new energy. Its main function is to achieve isolation of high-voltage circuits to ensure the safety of operators and to achieve measurement purposes. In actual work, it is often necessary to replace and repair the secondary side meter. However, the current transformer needs to comply with the principle that the secondary side is strictly prohibited from opening the circuit. That is, when the secondary side of the current transformer is open, the primary side current still flows, which will cause the secondary side voltage to rise sharply, seriously endangering the safety of equipment and personnel. The current transformer in the prior art does not have a dedicated temporary short-circuit function and needs to be fixed with a wiring clamp, which is cumbersome to operate. Therefore, it is necessary to design a transformer that can independently achieve temporary short-circuit. Summary of the invention

[0003] A new energy medium voltage transformer, comprising at least:

[0004] The transformer housing comprises an upper circular ring portion, a wiring lower portion below the upper circular ring portion, and a chamber assembly arranged in the wiring lower portion, wherein the chamber assembly comprises at least a rectangular main chamber, and the transformer housing further comprises a transverse partition arranged in the rectangular main chamber along the left-right direction, a partition through hole arranged in the transverse partition, and a guide middle plate arranged in the partition through hole; the chamber assembly further comprises a limiting plug ear formed at the upper end of the rectangular main chamber, the chamber assembly further comprises a mounting blind hole arranged below the rectangular main chamber, two mounting blind holes are provided, and a contact through hole is also formed upward on the right side of each mounting blind hole, a contact base rod is also provided at the bottom of the rectangular main chamber at the left side of the contact through hole, an adjustment base is provided on the left side of the upper end of the rectangular main chamber, a transverse through hole is provided along the inner edge of the adjustment base, and a limiting inner ring is also provided on the inner wall of the transverse through hole;

[0005] Two fixed contacts are provided, the fixed contacts are arranged below the rectangular main cavity, the fixed contacts correspond to the contact through holes one by one, the fixed contacts include a contact body inserted in the contact through hole and abutting against the right side of the contact base rod, and a transverse lug arranged on the left side of the contact body and arranged in the mounting blind hole, and the transverse lug is fixedly connected to the mounting blind hole by a bolt;

[0006] A sliding touch plate is arranged in the rectangular main cavity, the sliding touch plate is normally connected to the fixed contact, the sliding touch plate comprises a touch plate body slidably arranged in the partition through hole, a guide transverse groove formed in the touch plate body for accommodating the guide middle plate, and a sliding compression spring arranged in the guide transverse groove and located at the left side of the guide middle plate, a sliding contact is respectively arranged on the left and right sides of the touch plate body, and the sliding contact is connected to the mutual inductor coil located in the upper part of the ring through a soft wire;

[0007] A short-circuit assembly is slidably arranged in a rectangular main cavity. In an initial stage, the short-circuit assembly moves to the left to contact the sliding touch plate to achieve short-circuiting. In a second stage, the short-circuit assembly moves to the right with the sliding touch plate to disconnect the sliding touch plate from the fixed contact. The short-circuit assembly includes a short-circuit slide plate slidably arranged in the rectangular main cavity below the horizontal partition, a horizontal hole for accommodating a contact base rod and a contact body on the right side arranged in the short-circuit slide plate, a metal folding sheet arranged on the short-circuit slide plate, a compression socket arranged on the right side of the short-circuit slide plate, a longitudinal through hole arranged on the compression socket along the longitudinal direction, and a short-circuit compression spring arranged in the compression socket.

[0008] An action component, used to sequentially realize the leftward action of the short-circuit component in the initial stage and the rightward action of the sliding touch plate and the short-circuit component in the second stage, wherein the action component includes a rearward action component and a forward action component;

[0009] The rear moving component comprises a rotating round rod rotatably arranged in the horizontal through hole, a limiting ring groove formed on the outer wall of the rotating round rod and matched with the limiting inner ring, a transmission plug key arranged at the right end of the side wall of the rotating round rod, a rotating plug cylinder slidably sleeved on the rotating round rod, a transmission key hole formed on the outer wall of the rotating plug cylinder and plugged with the transmission plug key, a driving screw formed on the right side of the rotating plug cylinder and passing through the limiting plug ear, and a damping compression spring wound around the driving screw, wherein the damping compression spring is arranged between the rotating plug cylinder and the limiting plug ear, the outer edge of the rotating plug cylinder is provided with a plug cylinder ring groove and a driving slip ring is rotatably sleeved in the plug cylinder ring groove, and the lower end of the driving slip ring is provided with a driving plug rod inserted into the partition plate through hole, and the driving plug rod is stopped at the left side of the sliding touch plate;

[0010] The first moving component includes an internal threaded tube screwed on the driving screw, a connecting longitudinal arm arranged at the lower end of the internal threaded tube, and an in-hole cross bar arranged on the left side of the lower end of the connecting longitudinal arm and inserted into the right side of the compression socket, and anti-dropping blocks inserted into the longitudinal through holes are respectively provided on the upper and lower parts of the in-hole cross bar.

[0011] Beneficial effects:

[0012] The new energy medium-voltage transformer described in this case is a current transformer, which is connected to the transformer coil through the sliding contact of the sliding contact plate. Under normal conditions, the sliding contact is connected to the fixed contact and the electric meter to achieve the purpose of measuring current.

[0013] The new energy medium voltage transformer described in this case provides a short-circuit component to achieve temporary short-circuit:

[0014] In the initial stage, the first-moving component drives the short-circuit component to move leftward, so that the left short-circuit piece and the right short-circuit piece are connected to the corresponding sliding contacts to achieve short-circuit of the transformer coil;

[0015] In the second stage, the rear-moving component drives the sliding touch plate and the short-circuit component to move to the right, and the sliding touch plate is disconnected from the fixed contact, so as to facilitate the direct repair and replacement of the electric meter connected to the fixed contact; at the same time, the sliding touch plate and the short-circuit component always maintain a short-circuit connection to ensure that the mutual inductor will not be open-circuited. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of an embodiment of the medium voltage transformer.

[0017] Figure 2 It is a schematic diagram of another embodiment of the medium voltage transformer.

[0018] Figure 3 It is a front view of an embodiment of the medium voltage transformer.

[0019] Figure 4 It is a cross-sectional view of an embodiment of the medium voltage transformer.

[0020] Figure 5 It is a cross-sectional view of an embodiment of the transformer housing.

[0021] Figure 6 It is a partial cross-sectional view of the medium voltage transformer in the first state.

[0022] Figure 7 It is a partial cross-sectional view of the medium voltage transformer in the second state.

[0023] Figure 8 It is a partial cross-sectional view of the medium voltage transformer in the third state.

[0024] Fig. 9 It is a schematic diagram of an embodiment of the short-circuit component.

[0025] In the figure:

[0026] 1. Transformer housing, 11. Upper part of the circular ring, 12. Lower part of the wiring, 13. Chamber assembly, 131. Rectangular main cavity, 132. Limiting ear, 133. Installation blind hole, 134. Contact through hole, 135. Contact base rod, 136. Adjustment base, 137. Horizontal through hole, 138. Limiting inner ring, 14. Horizontal partition, 15. Partition through hole, 16. Guide middle plate, 17. Connection ear;

[0027] 2. Fixed contact, 21. Contact body, 22. Horizontal lug, 23. Wiring jack;

[0028] 3. sliding touch plate, 31. touch plate body, 32. guiding transverse groove, 33. sliding compression spring, 34. sliding contact;

[0029] 4. Short-circuit assembly, 41. Short-circuit slide plate, 42. Accommodating transverse hole, 43. Metal folding sheet, 431. Connecting transverse sheet, 432. Left short-circuit sheet, 433. Right short-circuit sheet, 44. Compression jack, 45. Vertical through hole, 46. Short-circuit compression spring;

[0030] 5. Action component;

[0031] 51. rear moving assembly, 511. rotating round rod, 512. limiting ring groove, 513. transmission key, 514. rotating insert cylinder, 515. transmission key hole, 516. driving screw, 517. damping compression spring, 518. driving slip ring, 519. driving insert rod;

[0032] 52. Pre-moving assembly, 521. Internally threaded pipe, 522. Connecting longitudinal arm, 523. Cross bar in hole, 524. Anti-dropping plug. DETAILED DESCRIPTION

[0033] A new energy medium voltage transformer, comprising at least:

[0034] The transformer housing 1 includes an upper ring portion 11 located above, a wiring lower portion 12 located below the upper ring portion 11, and a chamber assembly 13 arranged in the wiring lower portion 12, wherein the chamber assembly 13 includes at least a rectangular main cavity 131, and the transformer housing 1 also includes a horizontal partition 14 arranged in the rectangular main cavity 131 along the left-right direction, a partition through hole 15 arranged in the horizontal partition 14, and a guide middle plate 16 arranged in the partition through hole 15; the chamber assembly 13 also includes a limit plug ear 13 formed at the upper end of the rectangular main cavity 131 2. The chamber assembly 13 further includes a mounting blind hole 133 disposed below the rectangular main chamber 131. There are two mounting blind holes 133 in total. A contact through hole 134 is formed upward on the right side of each mounting blind hole 133. A contact base rod 135 is further disposed at the bottom of the rectangular main chamber 131 on the left side of the contact through hole 134. An adjustment base 136 is disposed on the left side of the upper end of the rectangular main chamber 131. A transverse through hole 137 is disposed in the transverse direction of the adjusting base 136. A limiting inner ring 138 is further disposed on the inner wall of the transverse through hole 137.

[0035] Two fixed contacts 2 are provided, the fixed contacts 2 are arranged below the rectangular main cavity 131, the fixed contacts 2 correspond to the contact through holes 134 one by one, the fixed contacts 2 include a contact body 21 inserted into the contact through hole 134 and abutting against the right side of the contact base rod 135, and a transverse lug 22 arranged on the left side of the contact body 21 and arranged in the mounting blind hole 133, and the transverse lug 22 is fixedly connected to the mounting blind hole 133 by bolts;

[0036] The sliding touch plate 3 is arranged in the rectangular main cavity 131. The sliding touch plate 3 is normally connected to the fixed contact 2. The sliding touch plate 3 includes a touch plate body 31 slidably arranged in the partition through hole 15, a guide transverse groove 32 formed in the touch plate body 31 for accommodating the guide middle plate 16, and a sliding compression spring 33 arranged in the guide transverse groove 32 and located on the left side of the guide middle plate 16. A sliding contact 34 is respectively arranged on the left and right sides of the touch plate body 31. The sliding contact 34 is connected to the mutual inductor coil located in the upper part 11 of the ring through a soft wire;

[0037] The short-circuit component 4 is slidably arranged in the rectangular main cavity 131. In the initial stage, the short-circuit component 4 moves to the left to contact the sliding touch plate 3 to achieve short-circuiting. In the second stage, the short-circuit component 4 moves to the right with the sliding touch plate 3 to disconnect the sliding touch plate 3 from the fixed contact 2; the short-circuit component 4 includes a short-circuit slide plate 41 slidably arranged in the rectangular main cavity 131 below the horizontal partition 14, a horizontal hole 42 arranged in the short-circuit slide plate 41 for accommodating the contact base rod 135 and the contact body 21 located on the right side, a metal folding piece 43 arranged on the short-circuit slide plate 41, a compression socket 44 arranged on the right side of the short-circuit slide plate 41, a longitudinal through hole 45 arranged on the compression socket 44 along the longitudinal direction, and a short-circuit compression spring 46 arranged in the compression socket 44.

[0038] The action component 5 is used to sequentially realize the leftward movement of the short-circuit component 4 in the initial stage and the rightward movement of the sliding touch plate 3 and the short-circuit component 4 in the second stage, and the action component 5 includes a rearward movement component 51 and a forward movement component 52;

[0039] The rear moving assembly 51 comprises a rotating rod 511 rotatably arranged in the transverse through hole 137, a limiting ring groove 512 formed on the outer wall of the rotating rod 511 and matched with the limiting inner ring 138, a transmission key 513 provided at the right end of the side wall of the rotating rod 511, a rotating plug cylinder 514 slidably sleeved on the rotating rod 511, a transmission key hole 515 formed on the outer wall of the rotating plug cylinder 514 and plugged with the transmission key 513, and a transmission key hole 515 formed on the right side of the rotating plug cylinder 514 and passing through the transmission plug cylinder 513. A driving screw 516 is provided through the limiting plug ear 132, and a damping spring 517 is wound around the driving screw 516. The damping spring 517 is provided between the rotating plug cylinder 514 and the limiting plug ear 132. The rotating plug cylinder 514 is provided with a plug cylinder annular groove on its outer edge and a driving slip ring 518 is rotatably sleeved in the plug cylinder annular groove. A driving plug rod 519 is provided at the lower end of the driving slip ring 518 to be inserted into the partition through hole 15. The driving plug rod 519 is stopped at the left side of the sliding touch plate 3.

[0040] The first moving component 52 includes an internal threaded tube 521 screwed on the driving screw 516, a connecting longitudinal arm 522 arranged at the lower end of the internal threaded tube 521, and an in-hole cross bar 523 arranged on the left side of the lower end of the connecting longitudinal arm 522 and inserted into the right side of the compression socket 44, and the in-hole cross bar 523 is respectively provided with anti-dropping blocks 524 inserted into the longitudinal through hole 45 on the upper and lower parts.

[0041] Further:

[0042] The metal folding piece 43 includes a connecting transverse piece 431 arranged at the front end of the short-circuit slide plate 41, a left short-circuit piece 432 arranged behind the left end of the connecting transverse piece 431 and fixed to the left end surface of the short-circuit slide plate 41, and a right short-circuit piece 433 arranged on the right side of the connecting transverse piece 431 and inserted backward into the accommodating transverse hole 42.

[0043] Further:

[0044] The lower wiring portion 12 is provided with a connecting ear 17 on the left and the right, respectively.

[0045] Further:

[0046] A wiring socket 23 is disposed at the lower end of the contact body 21 .

[0047] It should be noted that a stop groove which is narrow at the top and wide at the bottom is provided on the contact base rod 135 , and a stop protrusion which cooperates with the stop groove is provided on the left side of the contact body 21 .

[0048] The fixed contact 2 described in this case is connected to an electric meter.

[0049] Under normal conditions, the sliding contact 34 is connected to the fixed contact 2, connecting the fixed contact 2 and the electric meter:

[0050] The sliding compression spring 33 acts on the contact plate body 31 to move it to the left, driving the sliding contacts 34 to connect with the corresponding contact bodies 21 .

[0051] The present invention can also temporarily short-circuit the sliding contact 34 to facilitate the maintenance and replacement of the electric meter:

[0052] As the instruction manual Figure 6 , 7 As shown:

[0053] The rotating rod 511 and the transmission key 513 are twisted to drive the transmission key hole 515, the rotating insert cylinder 514 and the driving screw 516 to rotate. The driving screw 516 and the internal threaded tube 521 act to make the rear moving component 51 and the front moving component 52 approach each other.

[0054] In the initial stage, due to the elastic force of the damping compression spring 517, the rear-moving component 51 can only rotate but cannot move, and the driving screw 516 acts on the internal threaded tube 521 to drive the leading component 52 to move leftward as a whole, and drives the short-circuit component 4 to move leftward, until the left short-circuit piece 432 and the right short-circuit piece 433 of the metal folding piece 43 are respectively connected to the corresponding sliding contacts 34, so as to realize the short-circuit of the sliding contacts 34;

[0055] As the instruction manual Figure 8 As shown:

[0056] The rotating rod 511 and the transmission key 513 are continuously rotated to drive the transmission key hole 515, the rotating insert cylinder 514 and the driving screw 516 to rotate. The driving screw 516 and the internal threaded tube 521 act to make the rear moving component 51 and the front moving component 52 approach each other.

[0057] At this time, the second stage begins. Since the internal threaded tube 521 is stopped by the limit plug ear 132, the first moving component 52 cannot continue to move left. Therefore, the driving screw 516 rotates while driving the rotating plug cylinder 514 to overcome the damping of the damping spring 517 and move leftward.

[0058] The driving slip ring 518 and the driving rod 519 drive the sliding contact plate 3 to move to the left, and the sliding contact 34 is disconnected from the fixed contact 2, so as to facilitate the subsequent maintenance and replacement of the electric meter;

[0059] At the same time, the short-circuit assembly 4 moves rightward along with the sliding contact plate 3, and the short-circuit compression spring 46 is compressed and retracted. In this process, the metal folding piece 43 and the sliding contact 34 are always short-circuited.

Claims

1. A new energy medium voltage transformer, characterized in that: At least: A transformer housing (1) comprises an upper annular portion (11) located above, a wiring lower portion (12) located below the upper annular portion (11), and a chamber assembly (13) disposed in the wiring lower portion (12), wherein the chamber assembly (13) comprises at least a rectangular main chamber (131), and the transformer housing (1) further comprises a transverse partition (14) disposed in the rectangular main chamber (131) along a left-right direction, a partition through hole (15) disposed in the transverse partition (14), and a guide middle plate (16) disposed in the partition through hole (15); Two fixed contacts (2) are provided, and the fixed contacts (2) are arranged below the rectangular main cavity (131); A sliding touch plate (3) is arranged in the rectangular main cavity (131), and the sliding touch plate (3) is normally connected to the fixed contact (2); A short-circuit component (4) is slidably disposed in the rectangular main cavity (131); the short-circuit component (4) moves leftward in an initial stage to contact the sliding touch plate (3) to achieve short-circuiting; and the short-circuit component (4) moves rightward along with the sliding touch plate (3) in a second stage to disconnect the sliding touch plate (3) from the fixed contact (2); The action component (5) is used to sequentially realize the leftward action of the short-circuit component (4) in the initial stage and the rightward action of the sliding touch plate (3) and the short-circuit component (4) in the second stage.

2. A new energy medium voltage transformer according to claim 1, characterized in that: The chamber assembly (13) further comprises a limiting plug ear (132) formed at the upper end of the rectangular main chamber (131), the chamber assembly (13) further comprises a mounting blind hole (133) arranged below the rectangular main chamber (131), two mounting blind holes (133) are provided, each mounting blind hole (133) further comprises a contact through hole (134) formed upward on the right side, a contact base rod (135) is further provided at the bottom of the rectangular main chamber (131) and located on the left side of the contact through hole (134), an adjustment base (136) is provided on the left side of the upper end of the rectangular main chamber (131), a transverse through hole (137) is provided in the transverse direction along the inner side of the adjustment base (136), and a limiting inner ring (138) is further provided on the inner wall of the transverse through hole (137); The fixed contact (2) corresponds to the contact through hole (134) one by one, and the fixed contact (2) comprises a contact body (21) inserted into the contact through hole (134) and abutting against the right side of the contact base rod (135), and a transverse lug (22) arranged on the left side of the contact body (21) and arranged in the mounting blind hole (133), wherein the transverse lug (22) is fixedly connected to the mounting blind hole (133) by means of a bolt; The sliding touch panel (3) comprises a touch panel body (31) slidably arranged in the partition through hole (15), a guide transverse groove (32) formed in the touch panel body (31) for accommodating the guide middle plate (16), and a sliding compression spring (33) arranged in the guide transverse groove (32) and located on the left side of the guide middle plate (16), and a sliding contact (34) is respectively arranged on the left and right sides of the touch panel body (31), and the sliding contact (34) is connected to the mutual inductor coil located in the upper part of the ring (11) through a soft wire; The short-circuit assembly (4) comprises a short-circuit slide plate (41) slidably disposed in the rectangular main cavity (131) below the horizontal partition plate (14), a accommodating horizontal hole (42) disposed in the short-circuit slide plate (41) for accommodating a contact base rod (135) and a contact body (21) located on the right side, a metal folding sheet (43) disposed on the short-circuit slide plate (41), a compression socket (44) disposed on the right side of the short-circuit slide plate (41), a longitudinal through hole (45) disposed in the longitudinal direction on the compression socket (44), and a short-circuit compression spring (46) disposed in the compression socket (44).

3. A new energy medium voltage transformer according to claim 2, characterized in that: The action component (5) comprises a rear-moving component (51) and a front-moving component (52); The rear moving assembly (51) comprises a rotating rod (511) rotatably disposed in the transverse through hole (137), a limiting ring groove (512) formed on the outer wall of the rotating rod (511) and cooperating with the limiting inner ring (138), a transmission key (513) disposed at the right end of the side wall of the rotating rod (511), a rotating insert cylinder (514) slidably sleeved on the rotating rod (511), a transmission key hole (515) formed on the outer wall of the rotating insert cylinder (514) and plugged with the transmission key (513), and a transmission key hole (515) formed on the right side of the rotating insert cylinder (514) and passing through the rotating insert cylinder (514). A driving screw (516) is arranged through the limit plug ear (132), and a damping compression spring (517) is wound around the driving screw (516), wherein the damping compression spring (517) is arranged between the rotating plug cylinder (514) and the limit plug ear (132), the rotating plug cylinder (514) is provided with a plug cylinder annular groove on its outer edge and a driving slip ring (518) is rotatably sleeved in the plug cylinder annular groove, and a driving plug rod (519) is provided at the lower end of the driving slip ring (518) and is inserted into the partition plate through hole (15), and the driving plug rod (519) is stopped at the left side of the sliding touch plate (3); The first moving component (52) comprises an internally threaded tube (521) threadedly connected to the driving screw (516), a connecting longitudinal arm (522) provided at the lower end of the internally threaded tube (521), and an in-hole cross bar (523) provided at the left side of the lower end of the connecting longitudinal arm (522) and inserted into the right side of the compression plug hole (44), wherein the in-hole cross bar (523) is provided with anti-dropping plug blocks (524) inserted into the longitudinal through hole (45) at the upper and lower parts, respectively.

4. A new energy medium voltage transformer according to claim 3, characterized in that: The metal folding piece (43) comprises a connecting transverse piece (431) arranged at the front end of the short-circuiting slide plate (41), a left short-circuiting piece (432) arranged behind the left end of the connecting transverse piece (431) and fixed to the left end surface of the short-circuiting slide plate (41), and a right short-circuiting piece (433) arranged on the right side of the connecting transverse piece (431) and inserted backwards into the accommodating transverse hole (42).

5. A new energy medium voltage transformer according to claim 4, characterized in that: A connecting ear (17) is respectively provided on the left and the right of the lower wiring portion (12).

6. A new energy medium voltage transformer according to claim 5, characterized in that: A wiring socket (23) is provided at the lower end of the contact body (21).

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