A parallel combination structure of a thyristor and a vacuum switch

Abstract

A parallel combination structure of a thyristor and a vacuum switch, comprising: two busbars, a thyristor (4), a vacuum interrupter (9), a thyristor press-fitting member, and a vacuum interrupter support member; the thyristor (4) is arranged between the two busbars, the thyristor press-fitting member is arranged outside the two busbars, and the thyristor (4) is press-fitted through the thyristor press-fitting member; the vacuum interrupter (9) is arranged below the thyristor (4) and between the two busbars, the vacuum interrupter support member is located outside the busbars, and the vacuum interrupter is press-fitted through the vacuum interrupter support member; the present invention provides a parallel combination structure of a thyristor and a vacuum switch, which reduces the electrical connection points, is beneficial to improving the current-carrying capacity of the busbars, has a compact structure, occupies a small space, and is convenient for installation; simplifies the electrical connection, improves the reliability, and makes the overall structure of the equipment compact.

Description

Technical Field

[0001] The present invention relates to the field of power electronics engineering, and particularly to a parallel combination structure of a thyristor and a vacuum switch. Background Art

[0002] The vacuum switches used in power electronics engineering are generally independent components. Their incoming and outgoing busbars are designed and manufactured according to the required current-carrying capacity, and are connected to the circuit with bolts during use.

[0003] When using thyristors in power electronics engineering, they need to work under a certain pressing force. Generally, two busbars are respectively pressed against the positive and negative surfaces of the thyristor, connected together with bolts and end plates, and the bolts are ensured to have a certain pre-tightening force. For this purpose, disc springs are usually added to compensate for the change in the pre-tightening force of the bolts caused by temperature changes. The busbars of the thyristor also need to be designed and manufactured according to the specified current-carrying capacity, and the entire pressing assembly is connected to the circuit with bolts during use.

[0004] Therefore, in the connection between the thyristor and the switch, a set of bolts is required for connection; the busbars need to have sufficient overlapping area to ensure that the current density is not too large; additional wrench space is required for assembling the bolts; and the two components need their respective installation positions. For these reasons, the two components occupy a large space, increasing the volume of the equipment. Summary of the Invention

[0005] Aiming at the problem that the two components occupy a large space and increase the volume of the equipment when the thyristor is connected to the vacuum switch, the present invention provides a parallel combination structure of a thyristor and a vacuum switch, including: two busbars, a thyristor (4), a vacuum interrupter (9), a thyristor pressing member, and a vacuum interrupter support member;

[0006] The thyristor (4) is arranged between the two busbars, the thyristor pressing member is arranged outside the two busbars, and the thyristor (4) is pressed through the thyristor pressing member;

[0007] The vacuum interrupter (9) is arranged below the thyristor (4) and between the two busbars, the vacuum interrupter support member is located outside the busbars, and the vacuum interrupter is pressed through the vacuum interrupter support member.

[0008] Preferably, one of the busbars is a bent busbar, which is in a zigzag shape to match the sizes of the thyristor (4) and the vacuum interrupter (9).

[0009] Preferably, the other of the busbars is straight or zigzag at the connection with the thyristor (4) and the vacuum interrupter (9).

[0010] Preferably, the thyristor pressing member includes an end plate and a pressing block;

[0011] There are two of the pressing blocks and end plates respectively arranged on the outer sides of the busbars, and the thyristor (4) and the busbars are press-fitted.

[0012] Preferably, the thyristor press-fitting member further includes a fastening member and an elastic member. The elastic member is located between any one of the end plates and the pressing block. The end plate, the pressing block, the busbar, the thyristor and the elastic member are press-fitted through the fastening member.

[0013] Preferably, the elastic member is a disc spring (7).

[0014] Preferably, the vacuum interrupter support member includes two support end plates and a second pressing block; the two support end plates are symmetrically arranged in parallel on both sides of the vacuum interrupter;

[0015] One end of the second pressing block is connected to one of the support end plates, and the other end is connected to the vacuum interrupter.

[0016] Preferably, the two support end plates of the vacuum interrupter and the two end plates in the thyristor press-fitting member are both linear;

[0017] At least one side of the support end plate and the end plate are integrally formed.

[0018] Preferably, the length of the busbar is greater than the sum of the height of the end plate and the support end plate below it.

[0019] Preferably, the fastening member includes a bolt and a nut used in combination;

[0020] The end plate, the elastic member, the pressing block, the busbar and the thyristor (4) are press-fitted by screwing.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. A parallel combination structure of a thyristor and a vacuum switch provided by the present invention includes: two busbars, a thyristor (4), a vacuum interrupter (9), a thyristor press-fitting member and a vacuum interrupter support member; the thyristor (4) is arranged between the two busbars, the thyristor press-fitting member is arranged outside the two busbars, and the thyristor (4) is press-fitted through the thyristor press-fitting member; the vacuum interrupter (9) is arranged below the thyristor (4), between the two busbars, the vacuum interrupter support member is located outside the busbars, and the vacuum interrupter is press-fitted through the vacuum interrupter support member; the parallel combination structure of a thyristor and a vacuum switch provided by the present invention is beneficial to improving the current-carrying capacity of the busbar, has a compact structure, occupies a small space and is convenient for installation;

[0023] 2. The present invention proposes a type of parallel combination of thyristors and vacuum switches, which simplifies the electrical connection, improves the reliability, and makes the overall structure of the equipment compact. Description of the Drawings

[0024] Figure 1 It is the front view of the combined structure of the present invention;

[0025] Figure 2 It is the left view of the combined structure of the present invention;

[0026] In the figure: 1 - left end plate; 2 - left pressing block; 3 - left busbar; 4 - thyristor; 5 - right busbar; 6 - right pressing block; 7 - disc spring; 8 - right end plate; 9 - vacuum interrupter. Detailed Embodiment

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment 1:

[0029] A parallel combination structure of a thyristor and a vacuum switch, comprising: two busbars, a thyristor 4, a vacuum interrupter 9, a thyristor pressing member, and a vacuum interrupter support member;

[0030] The thyristor 4 is arranged between the two busbars, the thyristor pressing member is arranged outside the two busbars, and the thyristor 4 is pressed through the thyristor pressing member;

[0031] The vacuum interrupter 9 is arranged below the thyristor 4, between the two busbars, the vacuum interrupter support member is located outside the busbars, and the vacuum interrupter is pressed through the vacuum interrupter support member.

[0032] Preferably, one of the busbars is a bent busbar, which is in a zigzag shape to match the sizes of the thyristor 4 and the vacuum interrupter 9.

[0033] Preferably, the connection part of the other busbar with the thyristor 4 and the vacuum interrupter 9 is in a straight line or a zigzag shape.

[0034] Preferably, the thyristor pressing member includes an end plate and a pressing block;

[0035] Both the pressing block and the end plate are two, and are respectively arranged outside the busbars to press the thyristor 4 and the busbars.

[0036] Preferably, the thyristor press-fitting component further includes a fastener and an elastic member. The elastic member is located between any one end plate and the pressing block. The end plate, the pressing block, the bus bar, the thyristor, and the elastic member are press-fitted by the fastener.

[0037] Preferably, the elastic member is a disc spring 7.

[0038] Preferably, the vacuum interrupter support member includes two support end plates and a second pressing block; the two support end plates are symmetrically arranged in parallel on both sides of the vacuum interrupter;

[0039] One end of the second pressing block is connected to one of the support end plates, and the other end is connected to the vacuum interrupter.

[0040] Preferably, the two support end plates of the vacuum interrupter and the two end plates in the thyristor press-fitting component are both linear;

[0041] At least one side of the support end plate and the end plate are integrally formed.

[0042] Preferably, the length of the bus bar is greater than the sum of the height of the end plate and the support end plate below it.

[0043] Preferably, the fastener includes a bolt and a nut used in combination;

[0044] The end plate, the elastic member, the pressing block, the bus bar, and the thyristor 4 are press-fitted by screwing.

[0045] Embodiment 2:

[0046] As Figure 1 is the main view of the combined structure of the present invention. As Figure 2 shown in the left view of the combined structure of the present invention, the present invention provides a parallel combined structure of a thyristor and a vacuum switch, including: a thyristor 4, a vacuum interrupter 9, a set of bus bars, a thyristor press-fitting component, and a vacuum interrupter support member; the thyristor 4 and the vacuum interrupter 9 are respectively connected to the same set of bus bars; the thyristor 4 is above the vacuum interrupter 9, the thyristor 4 and the vacuum interrupter 9 are located inside the set of bus bars, the thyristor press-fitting component and the vacuum interrupter support member are located outside the set of bus bars, and the vacuum interrupter support member is located below the thyristor press-fitting component.

[0047] This structure reduces the electrical connection points, which is beneficial to improving the current-carrying capacity of the bus bar. The structure is compact, occupies a small space, and is convenient for installation; a type of parallel combination of a thyristor and a vacuum switch is proposed, which simplifies the electrical connection, improves the reliability, and makes the overall structure of the equipment compact.

[0048] The set of bus bars is composed of a left bus bar 3 and a right bus bar 5;

[0049] The left busbar 3 is respectively connected to the left side of the thyristor 4 and the left side of the vacuum interrupter 9;

[0050] The right busbar 5 is respectively connected to the right side of the thyristor 4 and the right side of the vacuum interrupter 9.

[0051] The busbars adjacent to the thyristor 4 and the vacuum interrupter 9 on the left and right are the same busbar. In this way, the bolt connection between the busbars is saved; because the busbars are shared, at any time, the busbars conduct current together, which is equivalent to increasing the current-carrying area and can improve the heat dissipation effect.

[0052] The right busbar 5 is a bent busbar in a broken line shape;

[0053] The upper part of the right busbar 5 is connected to the right side of the thyristor 4;

[0054] The lower part of the right busbar 5 is connected to the right side of the vacuum interrupter 9.

[0055] During assembly, because the thyristor requires a certain pressing force, there are also thyristor pressing parts on both sides of the busbar.

[0056] The thyristor pressing part includes an end plate, a pressing block, a fastener and an elastic part; here the elastic part uses a disc spring 7;

[0057] There are two pressing blocks, which are respectively located outside the busbar, there are two end plates, which are respectively located outside the pressing blocks, the disc spring 7 is located between the pressing block and the end plate on the right side, and the end plates are connected by fasteners.

[0058] The thyristor pressing part provides pressure for the end plate, the thyristor 4, the busbar, the pressing block and the disc spring 7 through the fastener to achieve pressing.

[0059] The end plate includes a left end plate 1 and a right end plate 8;

[0060] The left end plate 1 is located on the left side of the left busbar 3;

[0061] The right end plate 8 is located on the right side of the right busbar 5.

[0062] The pressing block includes a left pressing block 2 and a right pressing block 6;

[0063] The left pressing block 2 is located between the left end plate 1 and the left busbar 3;

[0064] The right pressing block 6 is located between the right busbar 5 and the right end plate 8 and is adjacent to the right busbar 5.

[0065] The disc spring 7 is arranged between the right pressing block 6 and the right end plate 8, and is used to compensate the pressure fluctuation caused by temperature change.

[0066] The vacuum interrupter support includes a left support end plate and a right support end plate.

[0067] The left support end plate is located on the left side of the left busbar 3, below the left end plate 1, and is on the same straight line as the left end plate 1;

[0068] The right support end plate is located on the right side of the right busbar 5, below the right end plate 8, and is on the same straight line as the right end plate 8;

[0069] At least one side of the left end plate 1 and the left support end plate, and the right end plate 8 and the right support end plate is shared.

[0070] The length of the busbar is greater than the sum of the height of the end plate and the vacuum interrupter support below it.

[0071] The combined structure can ultimately be installed in any direction, and the shape and position of the incoming and outgoing line busbars can be determined as required.

[0072] The above are only embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention pending approval.

Claims

1. A parallel combination structure of a thyristor and a vacuum switch, characterized in that, Comprising: Two busbars, a thyristor (4), a vacuum interrupter (9), a thyristor press-fitting part, and a vacuum interrupter support part; The thyristor (4) is arranged between the two busbars, the thyristor press-fitting part is arranged outside the two busbars, and the thyristor (4) is press-fitted through the thyristor press-fitting part; The vacuum interrupter (9) is arranged below the thyristor (4) and between the two busbars, the vacuum interrupter support part is located outside the busbars, and the vacuum interrupter is press-fitted through the vacuum interrupter support part; One of the busbars is a bent busbar, which is in a broken line shape to match the sizes of the thyristor (4) and the vacuum interrupter (9); The other of the busbars is in a straight line shape or a broken line shape at the connection with the thyristor (4) and the vacuum interrupter (9); The thyristor press-fitting part includes an end plate and a pressing block; Both the pressing block and the end plate are two, which are respectively arranged outside the busbars and press-fit the thyristor (4) and the busbars; The thyristor press-fitting part further includes a fastener and an elastic part, the elastic part is located between any one end plate and the pressing block, and the end plate, the pressing block, the busbar, the thyristor, and the elastic part are press-fitted through the fastener; The vacuum interrupter support part includes two support end plates and a second pressing block; the two support end plates are symmetrically arranged in parallel on both sides of the vacuum interrupter; One end of the second pressing block is connected to one of the support end plates, and the other end is connected to the vacuum interrupter; The two support end plates of the vacuum interrupter and the two end plates in the thyristor press-fitting part are both in a straight line shape; At least one side of the support end plate is integrally formed with the end plate; The fastener includes a bolt and a nut used in combination; The end plate, the elastic part, the pressing block, the busbar, and the thyristor (4) are press-fitted by means of screwing.

2. The combined structure according to claim 1, wherein, The elastic part is a disc spring (7).

3. The combined structure according to claim 1, characterized in that, The length of the busbar is greater than the sum of the height of the end plate and the support end plate below it.

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