Transformer

Abstract

The utility model belongs to the technical field of transformers, and discloses a transformer which comprises a box transformer substation shell, a high-voltage alternating-current switch and a lightning arrester assembly. The high-voltage alternating-current switch is arranged in the box transformer substation shell, and the high-voltage alternating-current switch comprises a plurality of isolating switches and two insulating plates. The lightning arrester assembly comprises a bracket, a plurality of mounting plates and a plurality of lightning arresters, the bracket comprises two vertical connecting plates correspondingly connected with the insulating plate and a transverse connecting plate connected between the two vertical connecting plates, the plurality of mounting plates are arranged on the transverse connecting plate at intervals, and the plurality of lightning arresters are mounted on the plurality of mounting plates in a one-to-one correspondence manner; and the plurality of isolation switches are connected in a one-to-one correspondence manner. According to the transformer, the plurality of lightning arresters are arranged on the high-voltage alternating-current switch, so that the space occupied by the lightning arresters in the box transformer substation shell is reduced; and the lightning arrester is arranged on the high-voltage alternating-current switch, so that direct connection between the lightning arrester and the isolating switch due to use of a primary busbar can be avoided, the number of parts is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a transformer. Background Art

[0002] The transformer for wind power or photovoltaic mainly comprises a box-type transformer housing, a high-voltage AC switch, a transformer component, an instrument transformer, a cable interface and a lightning arrester. The high-voltage AC switch is generally installed in the middle of the box-type transformer housing and divides the box-type transformer housing into two compartments. One of the two compartments is a power supply side compartment, which is mainly used for accommodating the transformer component, the instrument transformer, etc. The other compartment is a grid-connection side compartment, which is mainly used for accommodating the lightning arrester and the cable interface.

[0003] In the prior art, the lightning arrester is arranged on one side of the grid-connection side compartment far away from the high-voltage AC switch, and the lightning arrester is connected with the disconnector of the high-voltage AC switch through a primary busbar. This structure is not conducive to reducing the structural size of the grid-connection side compartment, and thus is not conducive to the miniaturization design of the box-type transformer housing. Moreover, since the lightning arrester and the disconnector are far away from each other, the lightning arrester needs to be connected with the disconnector through a primary busbar, which is not conducive to cost reduction. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a transformer, which reduces the volume of the box-type transformer housing, reduces the use of parts, and also reduces the production cost.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The transformer includes:

[0007] A box-type transformer housing;

[0008] A high-voltage AC switch, arranged in the box-type transformer housing, and the high-voltage AC switch includes a plurality of disconnectors and two insulating plates located on both sides of the disconnectors;

[0009] A lightning arrester assembly, including a bracket, a plurality of mounting plates and a plurality of lightning arresters. The bracket includes two vertical connecting plates and a horizontal connecting plate connected between the two vertical connecting plates. The two vertical connecting plates are respectively connected with the two insulating plates in one-to-one correspondence. The plurality of mounting plates are arranged on the horizontal connecting plate, and the plurality of lightning arresters are respectively mounted on the plurality of mounting plates and are respectively connected with the plurality of disconnectors in one-to-one correspondence.

[0010] As an optional solution, the mounting plate includes a hook plate and a support plate arranged at an angle. The hook plate is connected with the horizontal connecting plate, and the lightning arrester is mounted on the support plate.

[0011] As an alternative, the horizontal connecting plate includes a first horizontal plate and a second horizontal plate that are perpendicularly connected to each other. The hook plate is connected to the second horizontal plate. A support member is provided at a position on the first horizontal plate corresponding to the support plate, and the support plate can be supported on the support member.

[0012] As an alternative, a threaded hole is provided at a position on the first horizontal plate corresponding to the support plate. The support member is a screw, and the screw is screwed into the threaded hole and can support the support plate.

[0013] As an alternative, a first long hole is provided at a position on the horizontal connecting plate corresponding to the mounting plate. A first mounting hole is provided on the mounting plate. A first fastener can pass through the first long hole and the first mounting hole to connect the mounting plate to the horizontal connecting plate, and the mounting plate can be adjusted along the extending direction of the first long hole so that the lightning arrester is directly opposite to the corresponding disconnector.

[0014] As an alternative, a second long hole is provided on the vertical connecting plate. A second mounting hole is provided on the insulating plate. A second fastener can pass through the second long hole and the second mounting hole to connect the vertical connecting plate to the insulating plate, and the vertical connecting plate can be adjusted along the extending direction of the second long hole to adjust the distance between the lightning arrester and the disconnector.

[0015] As an alternative, a reinforcing plate is provided between the vertical connecting plate and the corresponding insulating plate.

[0016] As an alternative, a fixing plate is provided at one end of the lightning arrester connected to the mounting plate. The fixing plate and the mounting plate are connected by a third fastener.

[0017] As an alternative, the bracket is made of angle steel.

[0018] As an alternative, the lightning arrester assembly further includes a plurality of counters corresponding to the lightning arresters one by one. The plurality of counters are respectively used to record the discharge times of the plurality of lightning arresters.

[0019] Advantages of the present utility model:

[0020] A transformer provided by the present utility model installs multiple lightning arresters on a high-voltage AC switch through brackets and mounting plates, that is, the lightning arresters and the high-voltage AC switch are arranged on the same side of the box-type substation housing, improving the structural compactness, reducing the space occupied by the lightning arresters in the box-type substation housing, and effectively reducing the volume of the box-type substation housing; and by arranging the lightning arresters on the high-voltage AC switch, the lightning arresters can be arranged close to the disconnector of the high-voltage AC switch, avoiding the use of a primary busbar and directly connecting the lightning arresters to the disconnector, reducing the number of components and the production cost; in addition, by correspondingly connecting the two vertical connecting plates of the bracket to the two insulating plates of the high-voltage AC switch one by one, and arranging multiple mounting plates at intervals on the horizontal connecting plate to connect the high-voltage AC switch to the bracket, the structural design is more reasonable. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the transformer provided by the embodiment of the present utility model;

[0022] Figure 2 is a schematic structural diagram of the high-voltage AC switch and the lightning arrester assembly involved in the embodiment of the present utility model Figure 1 ;

[0023] Figure 3 is a schematic structural diagram of the high-voltage AC switch and the lightning arrester assembly involved in the embodiment of the present utility model Figure 2 ;

[0024] Figure 4 is a schematic structural diagram of the connection structure of the bracket and the mounting plate involved in the embodiment of the present utility model;

[0025] Figure 5 is a schematic structural diagram of the mounting plate involved in the embodiment of the present utility model;

[0026] Figure 6 is a schematic structural diagram of the bracket involved in the embodiment of the present utility model.

[0027] In the figure:

[0028] 1. Box-type substation housing; 11. Power supply side compartment; 12. Grid connection side compartment;

[0029] 2. High-voltage AC switch; 21. Disconnector; 22. Insulating plate; 221. Second mounting hole;

[0030] 3. Lightning arrester assembly; 31. Bracket; 311. Vertical connecting plate; 3111. Second long hole; 312. Horizontal connecting plate; 3121. First horizontal plate; 3121a. Threaded hole; 3122. Second horizontal plate; 3122a. First long hole; 32. Mounting plate; 321. Hook plate; 3211. First mounting hole; 322. Support plate; 3221. Third mounting hole; 33. Lightning arrester; 331. Fixed plate; 34. Reinforcing plate; 35. Counter;

[0031] 4. Transformer component;

[0032] 5. Instrument transformer;

[0033] 6. Cable interface. Detailed implementation manners

[0034] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation to the present utility model.

[0035] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. It may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] In the description of the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first feature and the second feature, or may include the situation where the first feature and the second feature are not in direct contact but are in contact through other features therebetween. Moreover, the first feature being "above", "above and over", and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below and under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0037] The technical solution of the present utility model will be further described below with reference to the drawings and through specific implementation manners.

[0038] As Figures 1-3As shown in the figure, an embodiment of the present utility model provides a transformer, which includes a box-type transformer housing 1, a high-voltage AC switch 2, a lightning arrester assembly 3, a transformer component 4, an instrument transformer 5, and a cable interface 6. Among them, the high-voltage AC switch 2 is arranged inside the box-type transformer housing 1, and divides the box-type transformer housing 1 into a power supply side compartment 11 and a grid-connected side compartment 12. The transformer component 4 and the instrument transformer 5 are arranged inside the power supply side compartment 11, and the cable interface 6 and the power supply component are arranged inside the grid-connected side compartment 12. And the high-voltage AC switch 2 includes a plurality of disconnectors 21.

[0039] The lightning arrester assembly 3 includes a bracket 31, a plurality of mounting plates 32, and a plurality of lightning arresters 33. In order to reduce the structural size of the grid-connected side compartment 12, the bracket 31 is connected to the high-voltage AC switch 2. The plurality of mounting plates 32 are arranged on the bracket 31, and the plurality of lightning arresters 33 are respectively mounted on the plurality of mounting plates 32 and are respectively connected to the plurality of disconnectors 21. Specifically, the high-voltage AC switch 2 further includes two insulating plates 22, and the two insulating plates 22 are arranged inside the box-type transformer housing 1 and are located on both sides of the disconnector 21. The bracket 31 includes two vertical connecting plates 311 and a horizontal connecting plate 312 connected between the two vertical connecting plates 311. The two vertical connecting plates 311 are respectively connected to the two insulating plates 22 to realize the connection between the bracket 31 and the high-voltage AC switch 2. The plurality of mounting plates 32 are arranged on the horizontal connecting plate 312, and the structural design is more reasonable.

[0040] In this embodiment, the plurality of disconnectors 21 are arranged at intervals along the first direction (i.e., Figure 2 the X-axis direction in the figure), the plurality of mounting plates 32 are arranged at intervals along the first direction on the bracket 31, the plurality of lightning arresters 33 are respectively mounted on the plurality of mounting plates 32 along the first direction and are respectively connected to the plurality of disconnectors 21. The two insulating plates 22 are arranged at intervals along the first direction inside the box-type transformer housing 1, and the two vertical connecting plates 311 are arranged at intervals along the first direction and are respectively connected to the two insulating plates 22.

[0041] The high-voltage AC switch 6 further includes other structural components such as a circuit breaker and a composite switch. In this embodiment, the lightning arrester 33 is connected to the corresponding disconnector 21 on the high-voltage AC switch 6.

[0042] This transformer mounts the plurality of lightning arresters 33 on the high-voltage AC switch 2 through the bracket 31 and the mounting plates 32, reducing the space occupied by the lightning arresters 33 in the grid-connected side compartment 12 of the box-type transformer housing 1 and effectively reducing the volume of the box-type transformer housing 1; and by arranging the lightning arresters 33 on the high-voltage AC switch 2, the lightning arresters 33 can be arranged close to the disconnectors 21 of the high-voltage AC switch 2, that is, the lightning arresters 33 and the high-voltage AC switch 2 are arranged on the same side inside the box-type transformer housing 1, improving the compactness of the structure. It can avoid using the primary busbar to directly connect the lightning arrester 33 and the disconnector 21, reducing the number of components and the production cost.

[0043] Further, as Figures 4-5 shown, the mounting plate 32 includes a hook plate 321 and a support plate 322 arranged at an angle. The hook plate 321 is connected to the transverse connecting plate 312, and the lightning arrester 33 is mounted on the support plate 322. By maintaining a reasonable angle between the hook plate 321 and the support plate 322, the installed lightning arrester 33 can be kept at an appropriate inclination angle to facilitate the connection between the lightning arrester 33 and the disconnecting switch 21.

[0044] To facilitate the processing and manufacturing of the bracket 31, both the vertical connecting plate 311 and the transverse connecting plate 312 are made of angle steel, and the vertical connecting plate 311 and the transverse connecting plate 312 are fixedly connected by welding to form the bracket 31.

[0045] Specifically, as Figure 6 and combined with Figure 4 shown, the transverse connecting plate 312 includes a first transverse plate 3121 and a second transverse plate 3122 connected perpendicularly to each other. The first transverse plate 3121 is arranged horizontally, and the second transverse plate 3122 is arranged vertically. A support member is provided at a position on the first transverse plate 3121 corresponding to the support plate 322. The hook plate 321 is connected to the second transverse plate 3122, and the support plate 322 can be supported on the support member, making the installation of the lightning arrester 33 more stable.

[0046] Optionally, the support member can be selected as a screw. Threaded holes 3121a (two can be provided) are provided at positions on the first transverse plate 3121 corresponding to the support plate 322. The screw is screwed into the threaded hole 3121a and can support the support plate 322, and the support force can also be adjusted by rotating the screw. The structural design is more reasonable and the use is more convenient.

[0047] To prevent the relative position between the lightning arrester 33 and the corresponding disconnecting switch 21 from deviating, a first long hole 3122a is provided at a position on the second transverse plate 3122 of the transverse connecting plate 312 corresponding to the hook plate 321 of the mounting plate 32 (in this embodiment, the first long hole 3122a extends along the first direction). A first mounting hole 3211 is provided on the hook plate 321 of the mounting plate 32. A first fastener passes through the first long hole 3122a and the first mounting hole 3211 to connect the hook plate 321 and the second transverse plate 3122. In this structure, by providing the first long hole 3122a, the first fastener can slide along the first direction in the first long hole 3122a, so that the mounting plate 32 can be adjusted in position along the first direction to realize the position adjustment of the lightning arrester 33.

[0048] Optionally, the first fastener can be selected as a bolt; two first long holes 3122a can be provided at each position on the second transverse plate 3122 corresponding to the mounting plate 32. The two first long holes 3122a are spaced along the first direction. Two first mounting holes 3211 corresponding to the first long holes 3122a are provided on the hook plate 321 of each mounting plate 32. The two first fasteners can be respectively inserted into the corresponding two sets of first long holes 3122a and first mounting holes 3211 to realize the connection between the hook plate 321 and the second transverse plate 3122, making the connection more firm.

[0049] In order to enable the arrester 33 to approach or move away from the disconnector 21 according to actual needs, a second long hole 3111 is provided on the vertical connecting plate 311 (in this embodiment, the second long hole 3111 extends along the second direction (i.e., Figure 2 the Y-axis direction in the figure)), and a second mounting hole 221 is provided on the insulating plate 22. The second fastener can be inserted into the second long hole 3111 and the second mounting hole 221 to connect the vertical connecting plate 311 to the insulating plate 22. In this structure, by providing the second long hole 3111, the second fastener can slide in the second long hole 3111 along the second direction to adjust the position of the vertical connecting plate 311 in the second direction, thereby driving the arrester 33 to approach or move away from the disconnector 21 and making the distance between the arrester 33 and the corresponding disconnector 21 more reasonable.

[0050] The first direction and the second direction are perpendicular to each other.

[0051] Optionally, the second fastener can also be selected as a bolt; two second long holes 3111 can be provided on each vertical connecting plate 311. The two second long holes 3111 are spaced along the second direction. Two second mounting holes 221 corresponding to the second long holes 3111 are provided on each insulating plate 22. The two second fasteners can be respectively inserted into the two sets of second long holes 3111 and second mounting holes 221 on one side to realize the connection between the vertical connecting plate 311 and the insulating plate 22, making the connection more firm.

[0052] To further strengthen the connection firmness between the vertical connecting plate 311 and the insulating plate 22, a reinforcing plate 34 is provided between the vertical connecting plate 311 and the corresponding insulating plate 22. Both ends of the reinforcing plate 34 can be respectively connected to the vertical connecting plate 311 and the insulating plate 22 by bolts.

[0053] To facilitate the connection between the lightning arrester 33 and the support plate 322, a fixing plate 331 is provided at one end of the lightning arrester 33 connected to the mounting plate 32. The fixing plate 331 and the support plate 322 of the mounting plate 32 are connected by a third fastener. Specifically, a plurality of third mounting holes 3221 are provided on both the fixing plate 331 and the support plate 322. The third fastener can be selected as a bolt, and the bolt passes through the third mounting holes 3221 of the fixing plate 331 and the third mounting holes 3221 of the support plate 322 to connect the fixing plate 331 and the support plate 322, making the installation more convenient.

[0054] Optionally, as Figure 1 shown, the lightning arrester assembly 3 further includes a plurality of counters 35 corresponding to the lightning arresters 33 one by one. The counters 35 are installed on the insulating plate 22 on one side. The plurality of counters 35 are respectively used to record the discharge times of the plurality of lightning arresters 33 to monitor the working times of the lightning arresters 33, and further judge whether the service life and performance of the lightning arresters 33 are normal.

[0055] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A transformer, characterized in that include: Box transformer housing (1); A high-voltage AC switch (2) is arranged in the box-type transformer housing (1), and the high-voltage AC switch (2) comprises a plurality of isolating switches (21) and two insulating plates (22) located on both sides of the isolating switches (21); The lightning arrester assembly (3) comprises a bracket (31), a plurality of mounting plates (32) and a plurality of lightning arresters (33), wherein the bracket (31) comprises two vertical connecting plates (311) and a horizontal connecting plate (312) connected between the two vertical connecting plates (311), the two vertical connecting plates (311) are connected to the two insulating plates (22) in a one-to-one correspondence, the plurality of mounting plates (32) are arranged on the horizontal connecting plates (312), the plurality of lightning arresters (33) are installed on the plurality of mounting plates (32) in a one-to-one correspondence, and are connected to the plurality of isolating switches (21) in a one-to-one correspondence.

2. The transformer according to claim 1, characterized in that: The mounting plate (32) comprises a hook plate (321) and a support plate (322) which are arranged at an angle, the hook plate (321) is connected to the transverse connecting plate (312), and the lightning arrester (33) is mounted on the support plate (322).

3. The transformer according to claim 2, characterized in that: The transverse connecting plate (312) comprises a first transverse plate (3121) and a second transverse plate (3122) which are vertically connected to each other, the hook plate (321) is connected to the second transverse plate (3122), a support member is provided at a position on the first transverse plate (3121) corresponding to the support plate (322), and the support plate (322) can be supported on the support member.

4. The transformer according to claim 3, characterized in that: A threaded hole (3121a) is provided at a position corresponding to the first transverse plate (3121) and the support plate (322); the support member is a screw, and the screw is screwed into the threaded hole (3121a) and can support the support plate (322).

5. The transformer according to claim 1, characterized in that: A first long hole (3122a) is provided at a position on the transverse connecting plate (312) corresponding to the mounting plate (32), and a first mounting hole (3211) is provided on the mounting plate (32). A first fastener can be inserted into the first long hole (3122a) and the first mounting hole (3211) to connect the mounting plate (32) to the transverse connecting plate (312), and the mounting plate (32) can be adjusted along the extension direction of the first long hole (3122a) so that the lightning arrester (33) faces the corresponding isolating switch (21).

6. The transformer according to claim 1, characterized in that: The vertical connection plate (311) is provided with a second long hole (3111), and the insulating plate (22) is provided with a second mounting hole (221). A second fastener can be inserted into the second long hole (3111) and the second mounting hole (221) to connect the vertical connection plate (311) to the insulating plate (22), and the vertical connection plate (311) can be adjusted along the extension direction of the second long hole (3111) to adjust the distance between the lightning arrester (33) and the disconnector (21).

7. The transformer according to claim 1, characterized in that: A reinforcing plate (34) is provided between the vertical connection plate (311) and the corresponding insulating plate (22).

8. The transformer according to claim 1, characterized in that: A fixing plate (331) is provided at one end of the lightning arrester (33) connected to the mounting plate (32), and the fixing plate (331) is connected to the mounting plate (32) via a third fastener.

9. The transformer according to claim 1, characterized in that: The bracket (31) is made of angle steel.

10. The transformer according to claim 1, characterized in that: The lightning arrester assembly (3) further comprises a plurality of counters (35) corresponding one to one to the lightning arresters (33), wherein the plurality of counters (35) are respectively used to record the number of discharges of the plurality of lightning arresters (33).

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