Low-noise oil-immersed transformer

Abstract

A low-noise oil-immersed transformer comprises a transformer body, a base for supporting the transformer body is arranged on the lower portion of the transformer body, the base comprises a box body and a top cover elastically arranged on the upper portion of the base, the top cover is connected with the box body through shock absorbers arranged at the four corners of the lower portion of the top cover, and a concave sound absorption groove is formed in the top cover and located on the inner sides of the four shock absorbers; a supporting plate, a silencing pore plate and first sound-absorbing cotton which are stacked in sequence are arranged on the sound-absorbing groove from bottom to top, an upper cover plate is arranged on the upper end face of the silencing pore plate, the transformer body is arranged on the top cover and the upper cover plate, and the height of the supporting plate in the vertical direction is adjustable. According to the structure that the supporting plate can ascend and descend, at least two sets of lifting units are symmetrically arranged on the lower portion of the sound absorption groove, each lifting unit comprises an adjusting piece, the adjusting pieces are arranged in the vertical direction, the upper ends of the adjusting pieces penetrate through the bottom of the sound absorption groove and abut against the lower surface of the supporting plate, and the adjusting pieces are made to abut against the supporting plate upwards by adjusting the adjusting pieces. And therefore, the first sound-absorbing cotton and the silencing hole plate which are pressed to be thin due to long-time use can be moved upwards, and gaps between the first sound-absorbing cotton and the silencing hole plate and the top cover are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil -immersed transformer technical field, specifically is a low noise oil -immersed transformer. BACKGROUND

[0002] Oil -immersed transformer is a common power transformer, it uses insulating oil as cooling and insulating medium. Oil -immersed transformer will produce certain noise in the operation process, these noises not only will influence surrounding environment and personnel's comfort, also can cause interference to the normal operation and maintenance of equipment. Therefore, it is very necessary to carry out noise reduction to oil -immersed transformer.

[0003] Prior art means has the sound absorption board in the oil -immersed transformer outside, is used for absorbing and reducing the spread of noise, installs the sound absorption board in the transformer outside and will influence the heat dissipation of transformer. There are also elastic columns and sound reduction hole plates installed at the bottom of the oil -immersed transformer, which are used as supports for the oil -immersed transformer to reduce vibration transmission to the ground, thereby reducing noise. However, this way of setting sound reduction hole plates at the bottom of the oil -immersed transformer will cause the sound reduction hole plates to be compacted downward and thinned over a long period of use, so that the sound reduction hole plates cannot contact the body of the oil -immersed transformer, and there is a gap between them, greatly reducing the sound absorption effect of the sound reduction hole plates on the noise generated by the oil -immersed transformer. UTILITY MODEL CONTENTS

[0004] To solve the technical problems in the background art, the utility model provides a low noise oil -immersed transformer.

[0005] The utility model technical scheme is as follows:

[0006] A low noise oil -immersed transformer, comprising a transformer body, a base supporting the transformer body at the lower part, the base comprising a box body and a top cover elastically arranged at the upper part of the box body, the top cover being connected with the box body through shock absorbers arranged at the four corners below the top cover, a sound absorption groove recessed on the top cover, the sound absorption groove being located inside the four shock absorbers;

[0007] A support plate, a sound reduction hole plate and a first sound absorption cotton are sequentially stacked from bottom to top on the sound absorption groove, an upper end surface of the sound reduction hole plate being provided with an upper cover plate, the transformer body being arranged on the top cover and the upper cover plate, the height of the support plate being adjustable along the vertical direction;

[0008] The structure of the support plate capable of lifting is that at least two groups of lifting units are symmetrically arranged at the lower part of the sound absorption groove, each lifting unit comprising an adjusting member arranged along the vertical direction, the upper end of the adjusting member penetrating through the bottom of the sound absorption groove and tightly abutting against the lower surface of the support plate, the adjusting member being adjusted to lift the support plate upward, so that the first sound absorption cotton and the sound reduction hole plate thinned due to long-term use can be moved upward to avoid gaps with the top cover.

[0009] By installing the box under the transformer body, the upper part of the box is provided with a top cover with a shock absorber, the shock absorber is connected to the top cover and the bottom plate of the box, the transformer body is arranged on the top cover, the shock absorber can play a shock-absorbing role on the transformer body, the lower part of the top cover is provided with a sound absorption slot, the first sound absorption cotton and the sound hole plate arranged in the sound absorption slot can gradually absorb the sound waves generated by the transformer body, and the first sound absorption cotton and the sound hole plate can be moved upward by the supporting plate, so that the first sound absorption cotton and the sound hole plate are not pressed downward to cause a gap between the lower surface of the top cover.

[0010] In order to further enhance the sound absorption efficiency of the sound absorption slot inside the sound wave, the sound hole plate and the supporting plate are provided with second sound absorption cotton, and the thickness of the second sound absorption cotton is greater than that of the first sound absorption cotton.

[0011] In order to avoid the phenomenon that the supporting plate is drilled or cracked due to the rotation of the adjusting part, the adjusting part is threadedly connected with the lower part of the sound absorption slot, the upper end of the adjusting part is rotatably provided with a jacking block, the upper surface of the jacking block is greater than the upper end surface of the adjusting part, and can be tightly attached to the lower surface of the supporting plate, so as to avoid damage to the supporting plate by the adjusting part, and the supporting area is increased, which is beneficial to the stable upward movement of the supporting plate.

[0012] The adjusting part is an adjusting bolt, in order to avoid loosening of the adjusting bolt due to vibration of the transformer body, a threaded hole matched with the adjusting part is formed in the lower part of the sound absorption slot, a mounting hole coaxial with the threaded hole is formed in the upper part of the threaded hole, the upper part of the mounting hole is in communication with the inside of the sound absorption slot, and a self-locking nut threadedly connected with the adjusting part is arranged in the mounting hole.

[0013] In the initial state, the thickness sum of the supporting plate, the second sound absorption cotton, the sound hole plate, the first sound absorption cotton and the upper cover plate is consistent with the depth of the sound absorption slot, so that the upper cover plate is tightly attached to the lower end of the transformer body.

[0014] In order to improve the sound absorption effect, the thickness ratio of the first sound absorption cotton, the sound hole plate and the second sound absorption cotton is 2:1:3, the thickness of the second sound absorption cotton is greater than that of the first sound absorption cotton, and the sound waves that cannot be absorbed by the first sound absorption cotton and the sound hole plate can be absorbed.

[0015] The connecting structure of the jacking block and the adjusting part is that the jacking block is provided with a rotating groove near one side of the upper end of the adjusting part, an annular clamping piece made of plastic material is arranged in the rotating groove, the upper end of the adjusting part is clamped with the annular clamping piece, the upper end of the adjusting part is detachably connected with the annular clamping piece, which is convenient for installing the adjusting part and the self-locking nut at the bottom of the sound absorption slot, and convenient for disassembly and replacement.

[0016] The beneficial effects of the utility model lie in:

[0017] The base under the transformer body can simultaneously play a role in shock absorption and noise reduction, the top cover of the base and the bottom plate of the box body are connected through the shock absorber, the transformer body is arranged on the top cover and the upper cover plate, the top cover is provided with a sound absorption groove which does not contact the bottom plate of the box body, the sound absorption groove is sequentially provided with first sound absorption cotton, a sound hole plate and second sound absorption cotton, and the sound waves generated by the transformer body can be gradually absorbed to reduce the noise generated by the transformer body;

[0018] The thickness of the support plate and the upper cover plate in the sound absorption groove is unchanged, the thickness of the sound hole plate, the first sound absorption cotton and the first sound absorption cotton will be thinned by the vibration of the transformer body in the long-term use process, a gap will appear between the upper cover plate and the lower part of the transformer body, and the noise reduction effect is affected, the lifting unit is arranged, the sound hole plate, the first sound absorption cotton and the first sound absorption cotton are pushed upward by pushing the support plate upward, the first sound absorption cotton is always close to the upper cover plate, and the upper cover plate is also pushed upward, so that the upper cover plate is close to the lower part of the transformer body, and the noise reduction effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In the drawings:

[0020] Figure 1 is a structural schematic diagram;

[0021] Figure 2 is a schematic diagram of the internal structure of the box body;

[0022] Figure 3 is Figure 2 is an enlarged structural schematic diagram of A in the figure;

[0023] Figure 4 is Figure 2 is a partial sectional view structural schematic diagram;

[0024] Figure 5 is Figure 4 is an enlarged structural schematic diagram of B in the figure;

[0025] The components represented by the reference numerals in the drawings are:

[0026] 1, transformer body; 2, box body; 3, top cover; 31, sound absorption groove; 311, threaded hole; 312, mounting hole; 4, shock absorber; 5, upper cover plate; 6, first sound absorption cotton; 7, sound hole plate; 8, second sound absorption cotton; 9, support plate; 10, adjusting piece; 11, jacking block; 111, rotating groove; 12, self-locking nut; 13, annular clamping piece. DETAILED DESCRIPTION

[0027] Referring to Figure 1 , Figure 2 and Figure 3As shown in the figure, a low-noise oil-immersed transformer includes a transformer body 1, the lower part of which is provided with a base for supporting it, the base includes a box 2 and a top cover 3 elastically arranged on the upper part of the box, the top cover 3 is connected with the box 2 through the shock absorbers 4 arranged at the four corners below the top cover 3, and the top cover 3 is provided with a concave sound absorption groove 31 located inside the four shock absorbers 4.

[0028] As shown in the figure, Figure 3 , Figure 4 and Figure 5 As shown in the figure, the sound absorption groove 31 is provided with a support plate 9, a sound hole plate 7 and a first sound absorption cotton 6 stacked in sequence from bottom to top, the upper end surface of the sound hole plate 7 is provided with an upper cover plate 5, the thicknesses of the support plate 9, the sound hole plate 7, the first sound absorption cotton 6 and the upper cover plate 5 are consistent with the depth of the sound absorption groove 31, the transformer body 1 is arranged on the top cover 3 and the upper cover plate 5, and the height of the support plate 9 in the vertical direction is adjustable. In order to further enhance the sound absorption efficiency of the sound absorption groove 31 to the sound wave and play a role in reducing the noise of the transformer body 1, the second sound absorption cotton 8 is arranged between the sound hole plate 7 and the support plate 9, and the thickness of the second sound absorption cotton 8 is greater than that of the first sound absorption cotton 6. In the initial state of the embodiment, the total thickness of the support plate 9, the second sound absorption cotton 8, the sound hole plate 7, the first sound absorption cotton 6 and the upper cover plate 5 is consistent with the depth of the sound absorption groove 31, and the second sound absorption cotton 8, the sound hole plate 7 and the first sound absorption cotton 6 will be thinned by the transformer body 1 pressing downward through the upper cover plate 5 during long-term use. Therefore, the support plate 9 can be arranged to move upward.

[0029] In order to improve the sound absorption effect, the thickness relationship of the above-mentioned first sound absorption cotton 6, sound hole plate 7 and second sound absorption cotton 8 is that the thickness ratio of the first sound absorption cotton 6, sound hole plate 7 and second sound absorption cotton 8 is 2:1:3, the thickness of the second sound absorption cotton 8 is greater than that of the first sound absorption cotton 6, and the sound wave that cannot be absorbed by the first sound absorption cotton 6 and the sound hole plate 7 can be absorbed.

[0030] As shown in the figure, Figure 3 and Figure 5 The structure that the above-mentioned support plate 9 can be lifted and lowered is that at least two groups of lifting units are symmetrically arranged at the lower part of the sound absorption groove 31, the lifting unit includes an adjusting piece 10, the adjusting piece 10 is arranged in the vertical direction, the upper end penetrates through the bottom of the sound absorption groove 31 and is tightly pressed to the lower surface of the support plate 9, the first sound absorption cotton 6 and the sound hole plate 7 that are thinned due to long-term use can be moved upward by adjusting the adjusting piece 10, so as to avoid the gap with the top cover 3.

[0031] By installing the box body 2 below the transformer body 1, the upper portion of the box body 2 is provided with a top cover 3 with a shock absorber 4, the shock absorber 4 connects the top cover 3 and the bottom plate of the box body 2, the transformer body 1 is arranged on the top cover 3, the shock absorber 4 can play a shock-absorbing role on the transformer body 1, the lower portion of the top cover 3 is provided with a sound absorption groove 31, the sound waves generated by the transformer body 1 can be gradually absorbed through the first sound absorption cotton 6 and the sound hole plate 7 arranged in the sound absorption groove 31, and the first sound absorption cotton 6 and the sound hole plate 7 can be moved upward through the supporting plate 9, so that the first sound absorption cotton 6 and the sound hole plate 7 are prevented from being pressed downward to cause a gap between the lower surface of the top cover 3.

[0032] Referring to Figure 5 As shown in the figure, the upper end surface area of the adjusting part 10 is small, and if it directly contacts with the supporting plate 9, it will cause the supporting plate 9 to be locally stressed and broken or cracked. In order to avoid the phenomenon that the supporting plate 9 is drilled or cracked due to the rotation of the adjusting part 10, the adjusting part 10 is threadedly connected with the lower portion of the sound absorption groove 31, and the upper end of the adjusting part 10 is rotatably provided with a jacking block 11, the upper surface of the jacking block 11 is larger than the upper end surface of the adjusting part 10, and can be tightly attached to the lower surface of the supporting plate 9, so as to avoid damage to the supporting plate 9 by the adjusting part 10, and the supporting area is increased, which is beneficial to the stable upward movement of the supporting plate 9.

[0033] The adjusting part 10 of the embodiment is an adjusting bolt, in order to prevent the adjusting bolt from loosening due to the vibration of the transformer body 1, a threaded hole 311 adapted to the adjusting part 10 is formed in the lower portion of the sound absorption groove 31, a mounting hole 312 coaxial with the threaded hole 311 is formed in the upper portion of the threaded hole 311, the upper portion of the mounting hole 312 is in communication with the inside of the sound absorption groove 31, and a self-locking nut 12 threadedly connected with the adjusting part 10 is arranged in the mounting hole 312, the mounting hole 312 and the self-locking nut 12 are adapted to a hexagonal groove structure, and the self-locking nut 12 arranged in the sound absorption groove 31 is used to lock the adjusted adjusting part 10. The jacking block 11 is partially located in the mounting hole 312, the length of the jacking block 11 is smaller than the inner diameter of the mounting hole 312, and the jacking block 11 can move up and down in the mounting hole 312.

[0034] Referring to Figure 5 As shown in the figure, the connecting structure of the jacking block 11 and the adjusting part 10 is that the jacking block 11 is provided with a rotating groove 111 near one side of the upper end of the adjusting part 10, and a ring-shaped clamping part 13 made of plastic material is arranged in the rotating groove 111, the ring-shaped clamping part 13 has a certain elasticity, is convenient to place in the rotating groove 111, and will not fall out of the rotating groove 111, the upper end of the adjusting part 10 is clamped with the ring-shaped clamping part 13, and the upper end of the adjusting part 10 is detachably connected with the ring-shaped clamping part 13, in the embodiment, the upper end of the adjusting part 10 is clamped in the middle portion of the ring-shaped clamping part 13, and when clamped, the adjusting part 10 can also prevent the ring-shaped clamping part 13 from being separated from the rotating groove 111, the adjusting part 10 and the ring-shaped clamping part 13 are detachably connected, which is convenient to install the adjusting part 10 and the self-locking nut 12 at the bottom of the sound absorption groove 31, and is convenient to disassemble and replace.

Claims

1. A low-noise oil-immersed transformer comprising a transformer body (1), characterized in that, Its lower part is provided with a base supporting it, the base includes a box (2) and an elastic top cover (3) provided on the upper part of the box, the top cover (3) is connected with the box (2) through the shock absorber (4) provided at the lower four corners of the top cover (3), the top cover (3) is provided with a concave sound absorption groove (31), and the sound absorption groove (31) is located on the inner side of the four shock absorbers (4); The sound absorption groove (31) is provided with a support plate (9), a sound absorbing hole plate (7) and a first sound absorbing cotton (6) stacked in sequence from bottom to top, the upper end surface of the sound absorbing hole plate (7) is provided with an upper cover plate (5), the transformer body (1) is arranged on the top cover (3) and the upper cover plate (5), and the height of the support plate (9) in the vertical direction is adjustable. The lower part of the sound absorption groove (31) is symmetrically provided with at least two groups of lifting units, the lifting unit comprises an adjusting piece (10), and the adjusting piece (10) is arranged in the vertical direction, and the upper end penetrates through the bottom of the sound absorption groove (31) and is tightly pressed to the lower surface of the support plate (9).

2. A low noise oil immersed transformer as claimed in claim 1, wherein, The sound absorbing hole plate (7) and the support plate (9) are provided with a second sound absorbing cotton (8), and the thickness of the second sound absorbing cotton (8) is greater than that of the first sound absorbing cotton (6).

3. A low noise oil immersed transformer as claimed in claim 2, wherein, The adjusting piece (10) is threadedly connected with the lower part of the sound absorption groove (31), the upper end of the adjusting piece (10) is rotationally provided with a pressing block (11), the upper surface of the pressing block (11) is greater than the upper end surface of the adjusting piece (10), and the pressing block (11) can be tightly attached to the lower surface of the support plate (9).

4. A low noise oil immersed transformer as claimed in claim 1, wherein, The lower part of the sound absorption groove (31) is provided with a threaded hole (311) matched with the adjusting piece (10), the upper part of the threaded hole (311) is provided with a mounting hole (312) coaxial with the threaded hole (311), the upper part of the mounting hole (312) communicates with the inside of the sound absorption groove (31), and the inside of the mounting hole (312) is provided with a self-locking nut (12) threadedly connected with the adjusting piece (10).

5. A low noise oil immersed transformer as claimed in claim 2, wherein, The thickness sum of the support plate (9), the second sound absorbing cotton (8), the sound absorbing hole plate (7), the first sound absorbing cotton (6) and the upper cover plate (5) is consistent with the depth of the sound absorption groove (31).

6. A low noise oil immersed transformer as claimed in claim 5, wherein, The thickness ratio of the first sound absorbing cotton (6), the sound absorbing hole plate (7) and the second sound absorbing cotton (8) is 2:1:

3.

7. A low noise oil immersed transformer as claimed in claim 3, wherein, The pressing block (11) is provided with a rotating groove (111) close to one side of the upper end of the adjusting piece (10), the rotating groove (111) is provided with an annular clamping piece (13) made of plastic material, and the upper end of the adjusting piece (10) is clamped with the annular clamping piece (13).

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