CN211699968U - Coil compression structure of dry-type transformer - Google Patents
Coil compression structure of dry-type transformer Download PDFInfo
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- CN211699968U CN211699968U CN202020609364.0U CN202020609364U CN211699968U CN 211699968 U CN211699968 U CN 211699968U CN 202020609364 U CN202020609364 U CN 202020609364U CN 211699968 U CN211699968 U CN 211699968U
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Abstract
The utility model relates to a coil compression structure of a dry-type transformer, which comprises a high-voltage coil, a low-voltage coil, a clamping piece and an insulating pressing block, wherein the insulating pressing block is formed by casting epoxy resin through a mould, the insulating pressing block is divided into an upper part and a lower part, the hardness of the lower part is less than that of the upper part, and the lower part is pressed against and contacted with the high-voltage coil and the low-voltage coil; the clamping piece is pressed against the upper part of the insulating pressing block through the pressing bolt. The utility model discloses an insulating briquetting has good mechanical properties and dimensional stability, and the contractility is low, consequently is difficult for receiving the influence of environment, long service life. The hardness of the upper portion and the lower portion of the insulating pressing block is different, the pressing force is guaranteed by utilizing the high hardness of the upper portion to match with the clamping piece and the pressing bolt to be pressed, the lower portion with small hardness not only can have a good damping effect, but also can deform automatically, local protrusions are clamped between the high-voltage coil and the low-voltage coil, the coil is effectively prevented from moving transversely, the safe insulation distance is guaranteed, the pressing effect is good, and the use performance of the transformer is improved.
Description
Technical Field
The utility model belongs to the technical field of the transformer technique and specifically relates to a coil compact structure of dry-type transformer is related to.
Background
After the dry-type transformer is electrified, the coil is subjected to transverse and longitudinal electrodynamic forces under the action of a magnetic field, and the electrodynamic force generated when the capacitance of the unit is larger is also larger. In order to ensure that the coil can still maintain sufficient mechanical strength under the action of electric force and the coil can not be displaced in the process of running, the coil of the dry-type transformer needs to be pressed tightly. The traditional method is that an upper clamping piece and a lower clamping piece are matched with an insulating pressing block to press a coil of the dry-type transformer, the insulating pressing block is arranged across a high-voltage coil and a low-voltage coil, and the upper clamping piece and the lower clamping piece are used for fixing the coil through the insulating pressing block under the action of a pressing bolt. In the prior art, the insulating pressing block is originally made of wood, but is exposed in the air and influenced by weather over time, so that the insulating pressing block is easily affected by damp, deformed, cracked and the like, is not firmly pressed, has short service life and has obvious potential safety hazard; moreover, the wall that current insulating briquetting supported the pressure coil is mostly the plane, and this kind of fixed knot constructs and can prevent coil longitudinal movement, nevertheless can not effectively prevent coil lateral shifting, still can not reach the ideal and compress tightly.
Disclosure of Invention
An object of the utility model is to overcome the weak point among the prior art, provide a coil compact structure of dry-type transformer, promote and compress tightly the effect.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a coil compaction structure of a dry-type transformer comprises a high-voltage coil, a low-voltage coil, a clamping piece and an insulating pressing block, wherein the insulating pressing block is formed by casting epoxy resin through a mould, the insulating pressing block is divided into an upper part and a lower part, the hardness of the lower part is smaller than that of the upper part, and the lower part is pressed against and contacted with the high-voltage coil and the low-voltage coil; the clamping piece is pressed against the upper part of the insulating pressing block through the pressing bolt.
The insulating pressing block is of a hexahedral structure, the insulating pressing block is provided with a first end and a second end in the length direction, the first end of the insulating pressing block is in compression joint with the high-voltage coil, the second end of the insulating pressing block is in compression joint with the low-voltage coil, and the width of the first end is larger than that of the second end.
According to the scheme, the upper part of the insulating pressing block is provided with a jacking groove, the opening of the jacking groove faces towards the clamping piece, and the jacking end of the compression bolt is inserted into the jacking groove.
Further, according to the scheme, a reinforcing member is embedded in the upper part of the insulating pressing block.
According to the scheme, the compression bolt is in threaded connection with the clamping piece, the clamping piece is a channel steel, a threaded hole is machined in the clamping piece, and the threaded hole meets the requirement that the compression bolt is in threaded connection and penetrates out of the jacking insulation pressing block.
The insulating pressing block of the utility model is molded by casting epoxy resin through a mould, has good mechanical property and dimensional stability and low contractility, is not easily influenced by the environment and has long service life; the insulating pressing block is divided into an upper part and a lower part, the hardness of the lower part is smaller than that of the upper part, and the lower part is pressed against and contacted with the high-voltage coil and the low-voltage coil; the clamping piece is pressed on the upper portion of the insulating pressing block through the pressing bolt, the clamping piece is further pressed by the aid of high hardness of the upper portion in a matched mode and the pressing bolt, pressing force is guaranteed, the lower portion with low hardness is in pressing contact with the high-voltage coil and the low-voltage coil, the lower portion can have a good damping effect and can deform automatically, local protrusions are clamped between the high-voltage coil and the low-voltage coil, transverse movement of the coils is effectively prevented, limiting function between the high-voltage coil and the low-voltage coil is enhanced, safe insulating distance is guaranteed, pressing effect is good, and usability of the transformer is improved.
Description of the drawings:
fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.
The specific implementation mode is as follows:
the conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, which is a schematic view of a preferred embodiment of the present invention, the present invention relates to a coil compression structure of a dry-type transformer, including a high-voltage coil 1, a low-voltage coil 2, a clamping member 3 and an insulating pressing block 4, wherein the high-voltage coil 1 is wound around the low-voltage coil 2, the clamping member 3 is disposed at the upper and lower ends of the high-voltage coil 1 and the low-voltage coil 2, and the insulating pressing block 4 is pressed on the high-voltage coil 1 and the low-voltage coil 2. The insulating pressing block 4 is formed by casting epoxy resin through a mould, is of an integrated structure, is convenient to manufacture, has good mechanical property and dimensional stability and low contractibility, is not easily influenced by the environment and has long service life. The insulation pressing block 4 is divided into an upper part 41 and a lower part 42, the hardness of the lower part 42 is smaller than that of the upper part 41, and the lower part 42 is pressed against and contacted with the high-voltage coil 1 and the low-voltage coil 2; the clamping piece 3 presses the upper part 41 of the insulating pressing block 4 through the pressing bolt 5. Utilize the high rigidity cooperation folder 3 and the 5 roof pressures of housing bolt of upper portion, guarantee the packing force, and the lower part that hardness is little supports to press contact high-voltage coil and low-voltage coil, lower part not only can have good shock attenuation effect, still can be from adapting to the deformation simultaneously, local protruding card package 421, card package 421 blocks between high-voltage coil 1 and low-voltage coil 2, effectively prevent coil lateral shifting, make the limit function between high-voltage coil and the low-voltage coil strengthened, the safe insulating distance has been guaranteed, it is good to compress tightly the effect, and promote the performance of transformer.
As shown in fig. 1, in this embodiment, the insulating compact 4 is a hexahedral structure, which has an ideal orientation and is convenient for assembly. The insulation pressing block 4 is provided with a first end head 44 and a second end head 45 in the length direction, the first end head 44 of the insulation pressing block 4 is in compression joint with the high-voltage coil 1, the second end head 45 of the insulation pressing block 4 is in compression joint with the low-voltage coil 2, and the width of the first end head 44 is larger than that of the second end head 45. The structure conforms to the working environment that the temperature of the low-voltage coil is generally higher than that of the high-voltage coil, so that the heat dissipation of the transformer can be facilitated, and meanwhile, the lower end face of the insulating pressing block 4 is gradually increased from the low-voltage coil to the high-voltage coil, so that the pressing area of the insulating pressing block on the coil is more reasonable in distribution, the pressing force is more uniform, the pressing effect is improved, and the heat dissipation of the transformer is improved.
Referring to fig. 1, in the present embodiment, the upper portion 41 of the insulating pressing block 4 is provided with a pressing groove 411, the pressing groove 411 opens toward the clamping member 3, the pressing end of the pressing bolt 5 is inserted into the pressing groove 411, and the pressing groove 411 relatively limits the pressing bolt 5, so that the pressing force is not biased, and is more uniform. In this embodiment, the reinforcing member 43 is embedded in the upper portion 41 of the insulating compact 4, the reinforcing member 43 may be a hardware or other hard body, and when the mold is cast, the reinforcing member 43 is completely covered by the epoxy resin, so that the reinforcing member 43 further improves the mechanical performance of the insulating compact 4. The shape of the reinforcing member 43 and the distribution of the insulating compacts 4 are not limited herein, and may be determined according to actual needs.
As shown in fig. 1, in the present embodiment, the hold-down bolt 5 is in threaded connection with the clamping piece 3, the clamping piece 3 is a channel steel, and a threaded hole is directly machined in the clamping piece 3, so that the structure is good; the threaded hole meets the requirement that the hold-down bolt 5 is in threaded connection and penetrates out of the jacking insulation pressing block 4. When the pressing device is used, the pressing bolt 5 is rotated to enable the pressing bolt 5 to be screwed in and out through the threaded hole of the clamping piece 3, the jacking end of the pressing bolt 5 is obtained to adjust the jacking insulation pressing block 4, the whole structure is simple, the manufacturing and the assembling are convenient, and the jacking structure is good and durable.
The insulating pressing block of the utility model is molded by casting epoxy resin through a mould, has good mechanical property and dimensional stability and low contractility, is not easily influenced by the environment and has long service life; the insulating pressing block is divided into an upper part and a lower part, the hardness of the lower part is smaller than that of the upper part, and the lower part is pressed against and contacted with the high-voltage coil and the low-voltage coil; the clamping piece is pressed on the upper portion of the insulating pressing block through the pressing bolt, the clamping piece is further pressed by the aid of high hardness of the upper portion in a matched mode and the pressing bolt, pressing force is guaranteed, the lower portion with low hardness is in pressing contact with the high-voltage coil and the low-voltage coil, the lower portion can have a good damping effect and can deform automatically, local protrusions are clamped between the high-voltage coil and the low-voltage coil, transverse movement of the coils is effectively prevented, limiting function between the high-voltage coil and the low-voltage coil is enhanced, safe insulating distance is guaranteed, pressing effect is good, and usability of the transformer is improved.
The present invention has been described in detail with reference to the embodiments, and only for the purpose of illustrating the technical concept and features of the present invention, the present invention is intended to be understood and implemented by those skilled in the art, and the protection scope of the present invention can not be limited thereby, so that equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (5)
1. The utility model provides a coil compact structure of dry-type transformer, includes high-voltage coil (1), low-voltage coil (2), folder (3) and insulating briquetting (4), its characterized in that: the insulation pressing block (4) is formed by casting epoxy resin through a die, the insulation pressing block (4) is divided into an upper part (41) and a lower part (42), the hardness of the lower part (42) is smaller than that of the upper part (41), and the lower part (42) is pressed against and contacted with the high-voltage coil (1) and the low-voltage coil (2); the clamping piece (3) is pressed against the upper part (41) of the insulating pressing block (4) through the pressing bolt (5).
2. A coil pressing structure of a dry type transformer as set forth in claim 1, wherein: the insulation pressing block (4) is of a hexahedral structure, the insulation pressing block (4) is provided with a first end (44) and a second end (45) in the length direction, the first end (44) of the insulation pressing block (4) is in compression joint with the high-voltage coil (1), the second end (45) of the insulation pressing block (4) is in compression joint with the low-voltage coil (2), and the width of the first end (44) is larger than that of the second end (45).
3. A coil press structure of a dry type transformer as set forth in claim 1 or 2, wherein: the upper part (41) of the insulating pressing block (4) is provided with a jacking groove (411), the opening of the jacking groove (411) faces to the clamping piece (3), and the jacking end of the pressing bolt (5) is inserted into the jacking groove (411).
4. A coil pressing structure of a dry type transformer as set forth in claim 3, wherein: a reinforcement (43) is embedded in the upper part (41) of the insulating compact (4).
5. A coil pressing structure of a dry type transformer as set forth in claim 1, wherein: the compression bolt (5) is in threaded connection with the clamping piece (3), the clamping piece (3) is a channel steel, a threaded hole is machined in the clamping piece (3), and the threaded hole meets the requirement that the compression bolt (5) is in threaded connection and penetrates out of the jacking insulation pressing block (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020609364.0U CN211699968U (en) | 2020-04-22 | 2020-04-22 | Coil compression structure of dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020609364.0U CN211699968U (en) | 2020-04-22 | 2020-04-22 | Coil compression structure of dry-type transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211699968U true CN211699968U (en) | 2020-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020609364.0U Active CN211699968U (en) | 2020-04-22 | 2020-04-22 | Coil compression structure of dry-type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211699968U (en) |
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2020
- 2020-04-22 CN CN202020609364.0U patent/CN211699968U/en active Active
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