Cushion block assembly capable of preventing upwarp

Abstract

The utility model relates to the technical field of transformer accessories, and discloses an anti-tilting cushion block assembly which comprises a cushion block body, and an anti-thermal-expansion tilting assembly is arranged in the cushion block body. According to the anti-tilting cushion block assembly, through cooperation of the inclined through groove, the supporting pipeline, the heat conduction plate and the heat conduction connecting rod, accumulated heat of the contact portion of the cushion block body and a coil is transferred to the heat conduction plate, and then through cooperation of the upper tilting arc plate and the lower tilting arc plate, heat dissipation air generated by an original heat dissipation system in a transformer is guided; through the arrangement of the supporting pipeline, cold air takes away heat through the interior of the supporting pipeline, the situation that the clamping and fixing stability of the coil is affected by the edge warping condition caused by thermal expansion of the cushion block body at the positioning groove is avoided, and meanwhile obstruction to an original air duct is reduced; and the heat dissipation air entering the accelerating pipe is accelerated, so that the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer accessories, in particular to a cushion block component capable of preventing warping. Background Art

[0002] During the assembly process of the transformer, the coil needs to be assembled into the transformer housing. When assembling the coil, the coil is usually first axially clamped on the outside of the transformer by an upper clamp and a lower clamp. A pad is set between the upper clamp and the coil and between the lower clamp and the coil. The clamp is provided with a bolt fastener. One end of the bolt fastener applies a clamping force to the pad. The pad can increase the effective area of ​​the clamping force between the clamp and the coil.

[0003] According to a disclosed dry-type transformer insulating spacer (publication number: CN206451579U), the trapezoidal platform structure design used in the above application has the advantages of low center of gravity, concentrated force, stability, small size, light weight, etc., and a soft spacer is provided at the bottom of the hard spacer to buffer the vibration generated by the transformer, so that the hard spacer will not shift even when subjected to a large impact, thereby obtaining better fixation and support effects for the high and low voltage windings, and improving the stability and safety of the transformer.

[0004] However, during actual use of the above-mentioned device, when the coil is installed above the pad body, the heat generated by the coil will be transferred to the positioning groove on the pad body. At this time, the positioning groove will expand due to the heat, causing the upper end of the pad body to expand and the center to warp upward, which may cause one side of the bottom end of the coil to warp, affecting the stability of the coil installation. The change in the position of the coil will also cause the wires connected to its surface to become tight or disconnected. In view of this, we propose a pad assembly that can prevent warping. Utility Model Content

[0005] The purpose of the utility model is to provide a cushion block assembly capable of preventing warping, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cushion block assembly capable of preventing warping, comprising a cushion block body, a creepage groove is provided on the outer side of the cushion block body, a positioning groove is provided on the upper surface of the cushion block body, and an anti-thermal expansion and warping assembly is arranged inside the cushion block body, and the anti-thermal expansion and warping assembly comprises:

[0007] An oblique through groove, the oblique through groove is provided on the left side surface of the cushion block body, a support pipe is fixedly installed inside the oblique through groove, the support pipe can support the inside of the oblique through groove to prevent the oblique through groove from collapsing, and an upward curved plate is fixedly installed on the lower end of the left side surface of the support pipe;

[0008] A heat conducting plate, the heat conducting plate is fixedly mounted on the inner top of the supporting pipe, a heat conducting connecting rod is fixedly mounted on the upper surface of the heat conducting plate, and the heat transferred by the heat conducting connecting rod can be transferred to the heat conducting plate;

[0009] A wind collecting scoop, which is arranged at the right end of the inner part of the supporting pipe, an accelerating tube is fixedly installed on the left surface of the wind collecting scoop, the interior of the wind collecting scoop is connected with the interior of the accelerating tube, and a fixing rod is fixedly installed on the outer side of the accelerating tube;

[0010] A downward curved plate is fixedly mounted on the upper end of the right side surface of the supporting pipe.

[0011] Preferably, one end of the heat-conducting connecting rod away from the heat-conducting plate passes through the inner wall of the pad body and fits with the inner wall of the positioning groove, and the heat of the inner wall of the positioning groove can be transferred to the heat-conducting plate through the heat-conducting connecting rod.

[0012] Preferably, the outer wall of the right end of the wind collecting scoop fits with the inner wall of the supporting pipe, so that the wind passing through the right end of the supporting pipe can completely enter the interior of the wind collecting scoop.

[0013] Preferably, one end of the fixing rod away from the accelerating tube is fixedly connected to the inner wall surface of the supporting pipe, and the accelerating tube is fixedly installed inside the supporting pipe through the fixing rod.

[0014] Preferably, a supporting vertical rod is fixedly installed inside the supporting pipe, and a through hole is opened on the left side surface of the supporting vertical rod.

[0015] Preferably, the size of the through hole matches the internal size of the accelerating tube.

[0016] Compared with the prior art, the utility model provides a cushion block assembly that can prevent warping, which has the following beneficial effects:

[0017] 1. The anti-warping pad assembly transfers the accumulated heat at the contact part between the pad body and the coil to the heat conducting plate through the cooperation of the arranged oblique through groove, supporting pipe, heat conducting plate and heat conducting connecting rod, and then guides the heat dissipation wind generated by the original heat dissipation system inside the transformer through the cooperation of the upward arc plate and the downward arc plate, so that the cold wind takes away the heat through the inside of the supporting pipe, avoids the situation that the pad body at the positioning groove expands due to accumulated heat and causes the edge to warp, which affects the stability of the coil clamping and fixing, and reduces the obstruction to the original air duct, and accelerates the heat dissipation wind entering the accelerating tube through the cooperation of the arranged wind collecting scoop, accelerating tube and fixing rod, thereby improving the heat dissipation efficiency, taking away more heat faster, and further reducing the situation of warping.

[0018] 2. The anti-warping cushion block assembly supports the inside of the support pipe through the support vertical rods and through holes, avoiding squeezing of the support pipe and causing collapse of the support pipe when the coil is built on the cushion block body, while reducing the impact on the air duct inside the support pipe and further accelerating the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure inside the cushion block body of the utility model;

[0021] Figure 3 It is a schematic diagram of the structure of the utility model at A;

[0022] Figure 4 It is a schematic diagram of the structure of the utility model at B;

[0023] Figure 5 It is a structural schematic diagram of the wind collecting hopper and the accelerating tube of the utility model.

[0024] In the figure: 1, pad body; 2, creepage groove; 3, positioning groove; 401, oblique through groove; 402, supporting pipe; 403, upward arc plate; 404, heat conduction plate; 405, heat conduction connecting rod; 406, wind collecting scoop; 407, accelerating tube; 408, fixing rod; 409, downward arc plate; 501, supporting vertical rod; 502, through hole. DETAILED DESCRIPTION

[0025] like Figure 1-Figure 5 As shown, the utility model provides a technical solution: a cushion block assembly that can prevent warping, including a cushion block body 1, a creepage groove 2 is provided on the outer side of the cushion block body 1, the creepage groove 2 can increase the creepage distance and improve safety, a positioning groove 3 is provided on the upper surface of the cushion block body 1, the positioning groove 3 is adapted to the bottom end of the transformer coil, and can be clamped at the bottom end of the coil to clamp and fix the coil, and the cushion block body 1 can be fixedly installed on the upper end of the clamp, and fixedly connected to the clamp by fasteners. The above-mentioned cushion block body 1 is similar to the transformer cushion block structure mentioned in the Chinese patent with announcement number CN219811391U (a transformer cushion block and transformer clamping structure), and the same effect is achieved. It is an existing technical means in the field and will not be described in detail here. An anti-thermal expansion and warping assembly is arranged inside the cushion block body 1.

[0026] The anti-thermal expansion and warping component includes: an oblique groove 401, a heat conducting plate 404, an air collecting scoop 406 and a downwardly warped arc plate 409. The oblique groove 401 is opened on the left surface of the pad body 1. A supporting pipe 402 is fixedly installed inside the oblique groove 401. The arranged supporting pipe 402 provides a supporting effect for the entire oblique groove 401 to prevent the pad body 1 from being squeezed when the coil is built above the pad body 1, causing the oblique groove 401 to collapse under pressure.

[0027] An upward curved plate 403 is fixedly installed on the lower end of the left surface of the supporting pipe 402, and a downward curved plate 409 is fixedly installed on the upper end of the right surface of the supporting pipe 402. In order to prevent the coil from overheating and affecting the use effect, a heat dissipation component is generally arranged at the bottom of the transformer, and a heat dissipation fan is used to blow air from bottom to top to dissipate heat from the coil. For example, the heat dissipation component mentioned in the energy-saving dry-type transformer with announcement number CN116779288A, when a wind duct from bottom to top is generated, the wind will enter the interior of the supporting pipe 402 along the inner wall of the downward curved plate 409, and then flow along the internal inclined surface of the supporting pipe 402 to the upper left, and finally flow upward along the inclined surface of the upward curved plate 403, reducing the obstruction of the final discharged wind to the original wind duct. When the original wind duct reaches the bottom of the upward curved plate 403, it will also flow upward along the outer wall surface of the upward curved plate 403, reducing the backflow generated, thereby reducing the impact on the original wind duct.

[0028] The heat conducting plate 404 is fixedly installed on the inner top of the supporting pipe 402, and a heat conducting connecting rod 405 is fixedly installed on the upper surface of the heat conducting plate 404. The end of the heat conducting connecting rod 405 away from the heat conducting plate 404 passes through the inner wall of the pad body 1 and fits with the inner wall of the positioning groove 3. When the coil is built on the top of the pad body 1, the bottom of the coil will be located inside the positioning groove 3, so that the heat generated by the coil during operation will also accumulate more inside the positioning groove 3. At this time, the pad body 1 at the positioning groove 3 is more prone to heat accumulation and expansion, resulting in the upper center of the pad body 1 being prone to bulging, which in turn causes the coil to be slightly lifted upward, affecting the stability of the installation and the stability of the coil itself. The heat generated by the coil part inside the positioning groove 3 is transferred to the heat conducting plate 404 through the arranged heat conducting connecting rod 405, and then this part of the heat is quickly taken away by the original heat dissipation system inside the transformer, thereby reducing the thermal expansion of the pad body 1.

[0029] The wind collecting scoop 406 is arranged at the inner right end of the supporting pipe 402, and the outer wall of the right end of the wind collecting scoop 406 is in contact with the inner wall of the supporting pipe 402. An accelerating tube 407 is fixedly installed on the left surface of the wind collecting scoop 406. The wind collecting scoop 406 can allow the wind entering the supporting pipe 402 along the downward curved plate 409 to move through the large space to the small space of the accelerating tube 407. According to the formula Q=VA, the flow rate Q remains unchanged, the cross-sectional area A decreases, and the speed V is bound to increase, thereby accelerating the flow rate of the air after entering the supporting pipe 402, further accelerating the heat dissipation efficiency, and a fixing rod 408 is fixedly installed on the outer side of the accelerating tube 407. The end of the fixing rod 408 away from the accelerating tube 407 is fixedly connected to the inner wall surface of the supporting pipe 402, and the accelerating tube 407 and the wind collecting scoop 406 are fixedly installed in the supporting pipe 402 by the fixing rod 408 to avoid shaking that affects the stability of the connection.

[0030] A support vertical rod 501 is fixedly installed inside the support pipe 402. The support vertical rod 501 is also made of heat-conducting material. A through hole 502 is opened on the left surface of the support vertical rod 501. The size of the through hole 502 is compatible with the internal size of the accelerating tube 407. The set support vertical rod 501 can support the inside of the support pipe 402, enhance the pressure resistance of the support pipe 402, and reduce the deformation of the support pipe 402 when the pad body 1 supports the bottom of the coil and the coil squeezes the support pipe 402. At the same time, the size of the through hole 502 is the same as the size of the wind column generated by the accelerating tube 407. When the wind passes through the accelerating tube 407, it will quickly pass through the through hole 502, reducing the impact on the wind column. At the same time, the heat absorbed by the heat conducting plate 404 will be transferred to the support vertical rod 501. When the wind column passes through the through hole 502, the heat dissipation effect can be accelerated.

[0031] In the utility model, during use, when the coil is built on the pad block body 1, the heat generated at the contact part between the coil and the pad block body 1 will be transferred to the heat conducting plate 404 through the heat conducting connecting rod 405, and then transferred to the inner wall of the through hole 502 through the supporting vertical rod 501. When the heat dissipation system inside the transformer starts to blow cold air upward, the cold air will enter the interior of the supporting pipe 402 along the inclined surface of the inner wall of the downward curved arc plate 409, and through the cooperation of the wind collecting scoop 406 and the accelerating tube 407, the wind passing space is reduced and the flow rate is accelerated, so that the cold air can pass through the through hole 502 more quickly, thereby quickly taking away the heat and avoiding the accumulation of heat in the positioning groove 3, resulting in heat accumulation and expansion at the center of the upper end of the pad block body 1, and then causing the pad block body 1 to warp, affecting the stability of the coil installation. Finally, the wind will flow downward through the inclined surface of the inner wall of the upward curved arc plate 403, merge with the original air duct, and reduce the obstruction to the original air duct.

[0032] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A cushion block assembly capable of preventing warping, comprising a cushion block body (1), a creepage groove (2) being provided on the outer side of the cushion block body (1), and a positioning groove (3) being provided on the upper surface of the cushion block body (1), characterized in that: An anti-thermal expansion and warping component is arranged inside the pad body (1), and the anti-thermal expansion and warping component comprises: An oblique through groove (401), the oblique through groove (401) being provided on the left side surface of the cushion block body (1), a support pipe (402) being fixedly installed inside the oblique through groove (401), and an upward curved plate (403) being fixedly installed at the lower end of the left side surface of the support pipe (402); A heat conducting plate (404), the heat conducting plate (404) being fixedly mounted on the inner top end of the supporting pipe (402), and a heat conducting connecting rod (405) being fixedly mounted on the upper surface of the heat conducting plate (404); An air collecting scoop (406), the air collecting scoop (406) being arranged at the inner right end of the supporting pipe (402), an accelerating tube (407) being fixedly mounted on the left surface of the air collecting scoop (406), and a fixing rod (408) being fixedly mounted on the outer side of the accelerating tube (407); A downward curved plate (409), wherein the downward curved plate (409) is fixedly mounted on the upper end of the right side surface of the supporting pipe (402).

2. The anti-warping pad assembly according to claim 1, characterized in that: One end of the heat-conducting connecting rod (405) away from the heat-conducting plate (404) passes through the inner wall of the cushion block body (1) and fits into the inner wall of the positioning groove (3).

3. The anti-tilting pad assembly according to claim 1, characterized in that: The outer wall of the right end of the air collecting scoop (406) is in contact with the inner wall of the supporting pipe (402).

4. The anti-tilting pad assembly according to claim 1, characterized in that: One end of the fixing rod (408) away from the accelerating tube (407) is fixedly connected to the inner wall surface of the supporting pipe (402).

5. The anti-warping pad assembly according to claim 1, characterized in that: A support vertical rod (501) is fixedly installed inside the support pipe (402), and a through hole (502) is provided on the left side surface of the support vertical rod (501).

6. The anti-lifting cushion block assembly according to claim 5, characterized in that: The size of the through hole (502) is adapted to the internal size of the accelerating tube (407).

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