Dry-type transformer with coil pressing structure

Abstract

The utility model relates to the technical field of dry-type transformers, and discloses a dry-type transformer with a coil pressing structure, which comprises a frame, the inner bottom of the frame is fixedly connected with a dry-type transformer body, the outer wall of the dry-type transformer body is wound with a coil, and the inner bottom of the frame is provided with a pressing assembly. According to the dry-type transformer with the coil pressing structure, adjustment of the maximum telescopic distance of the telescopic rod is achieved by rotating the threaded sleeve, then the force for clamping the coil can be adjusted, the pressing degree of the coil can be controlled according to actual needs so as to adapt to different working conditions or coil design requirements, it is ensured that the coil cannot be loosened or displaced, and further the effect that the coil is not loosened or displaced is achieved. The transverse protruding strips provide additional resistance for friction between the rubber pad and the surface of the coil, pressure can be more evenly distributed on the surface of the coil, the problem of local stress concentration in the coil pressing process is avoided, and the risk of coil deformation or damage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of dry-type transformers, in particular to a dry-type transformer with a coil pressing structure. Background Art

[0002] A dry-type transformer is a power transformer characterized in that the core and windings are not immersed and cooled by insulating oil. The windings of dry-type transformers are usually insulated and fixed using insulating materials instead of being immersed in insulating oil. This winding insulation material can be organic, inorganic or composite, and has high insulation and heat resistance.

[0003] According to a disclosed dry-type transformer with a coil clamping structure (publication number: CN213877785U), a coil is wound around the outside of the dry-type transformer in the above application, and a limit seat is integrally formed at the bottom of the dry-type transformer, a bending groove is cut on the top surface of the limit seat, the other end of the coil is connected to a wire end, and the other end of the wire end passes through the bending groove, and a fixed block is fixed to the end of the wire end.

[0004] However, during actual use of the above-mentioned equipment, the bending groove bends the coil, which will cause its cross-sectional area to decrease or its shape to change, thereby increasing resistance. The increase in resistance will lead to energy loss and increased heat generation, reduce the efficiency of the electrical system, and cause local overheating and damage. In view of this, we propose a dry-type transformer with a coil compression structure. Utility Model Content

[0005] The purpose of the utility model is to provide a dry-type transformer with a coil pressing structure to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a dry-type transformer with a coil clamping structure, comprising a frame, the inner bottom of the frame is fixedly connected with a dry-type transformer body, the outer wall of the dry-type transformer body is wound with a coil, the inner bottom of the frame is provided with a clamping assembly, and the clamping assembly includes:

[0007] A mounting frame, wherein the inner bottom of the frame is fixedly connected with the mounting frame;

[0008] A lower clamping arc plate, the inner bottom of the frame is fixedly connected to the lower clamping arc plate;

[0009] Telescopic rod, the top end surface of the frame is fixedly connected with a bracket, and the bracket is sleeved with the telescopic rod;

[0010] An upper clamping arc plate, the bottom end surface of the telescopic rod is fixedly connected to one end of a connecting rod, and the other end of the connecting rod passes through the mounting frame and is fixedly connected to the upper clamping arc plate;

[0011] A threaded sleeve, wherein the side wall of the telescopic rod is threadedly connected with the threaded sleeve;

[0012] A limiting plate, to which the side wall of the bracket is fixedly connected;

[0013] A tension spring, wherein the side wall of the connecting rod is sleeved with a tension spring, one end of the tension spring is fixedly connected to the bottom end of the telescopic rod, and the other end of the tension spring is fixedly connected to the top end surface of the mounting bracket;

[0014] A rubber pad is fixedly connected to the end surfaces of the upper clamping arc plate and the lower clamping arc plate.

[0015] Preferably, a transverse convex strip is fixedly connected to the end surface of the rubber pad.

[0016] Preferably, the rubber pad abuts against the side wall of the coil, and the rubber pad can increase the friction force of the lower clamping arc plate and the upper clamping arc plate on the coil, thereby improving the clamping effect.

[0017] Preferably, the bottom end of the threaded sleeve abuts against the top end of the limiting plate, and the limiting plate limits the longitudinal position of the threaded sleeve.

[0018] Preferably, the lower clamping arc plate and the upper clamping arc plate are symmetrically distributed on both sides of the coil with the axis of the coil as the axis of symmetry.

[0019] Preferably, there are a plurality of transverse ridges, and the plurality of transverse ridges are arranged at equal intervals on the end surface of the rubber pad.

[0020] Compared with the prior art, the utility model provides a dry-type transformer with a coil compression structure, which has the following beneficial effects:

[0021] 1. The dry-type transformer with a coil clamping structure is provided with a lower clamping arc plate, a bracket, a telescopic rod, a connecting rod and an upper clamping arc plate. The tension spring and the threaded sleeve are matched, and the threaded sleeve is rotated to adjust the maximum telescopic distance of the telescopic rod, thereby adjusting the clamping force of the coil. The degree of compression of the coil is controlled according to actual needs to adapt to different working conditions or coil design requirements, ensuring that the coil will not loosen or move.

[0022] 2. In order to improve the clamping effect of the upper clamping arc plate and the lower clamping arc plate on the coil, when the coil is clamped by the upper clamping arc plate and the lower clamping arc plate, the transverse convex strip provides additional resistance for the friction between the rubber pad and the coil surface, so that the coil is more firmly fixed between the upper clamping arc plate and the lower clamping arc plate, and the pressure can be more evenly distributed on the coil surface, avoiding the problem of local stress concentration during the coil clamping process and reducing the risk of coil deformation or damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the clamping assembly of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of area A of the utility model.

[0026] In the figure: 1, frame; 2, dry-type transformer body; 3, coil; 4, clamping assembly; 401, mounting frame; 402, lower clamping arc plate; 403, bracket; 404, telescopic rod; 405, connecting rod; 406, tension spring; 407, threaded sleeve; 408, limit plate; 409, upper clamping arc plate; 410, rubber pad; 411, transverse convex strip. DETAILED DESCRIPTION

[0027] like Figure 1-3 As shown, the utility model provides a technical solution: a dry-type transformer with a coil clamping structure, comprising a frame 1, the inner bottom of the frame 1 is fixedly connected with a dry-type transformer body 2, the outer wall of the dry-type transformer body 2 is wound with a coil 3, the inner bottom of the frame 1 is provided with a clamping assembly 4, the clamping assembly 4 includes a mounting frame 401, the inner bottom of the frame 1 is fixedly connected with the mounting frame 401, the inner bottom of the frame 1 is fixedly connected with a lower clamping arc plate 402, the top end surface of the frame 1 is fixedly connected with a bracket 403, the bracket 403 is sleeved with a telescopic rod 404, the bottom end surface of the telescopic rod 404 is fixedly connected with one end of a connecting rod 405, the other end of the connecting rod 405 passes through the mounting frame 401, and is fixedly connected with an upper clamping arc plate 409, the lower clamping arc plate 402 and the upper clamping arc plate 409 are symmetrically distributed on both sides of the coil 3 with the axis of the coil 3 as the axis of symmetry, the side wall of the telescopic rod 404 is provided with a threaded groove, and the side wall thread of the telescopic rod 404 is provided with a threaded groove. The threaded sleeve 407 is connected with the threaded sleeve 407, the bottom end of the threaded sleeve 407 is abutted against the top end of the limit plate 408, the limit plate 408 limits the longitudinal position of the threaded sleeve 407, the side wall of the bracket 403 is fixedly connected to the limit plate 408, the side wall sleeve of the connecting rod 405 is provided with a tension spring 406, one end of the tension spring 406 is fixedly connected to the bottom end of the telescopic rod 404, and the other end of the tension spring 406 is fixedly connected to the top end surface of the mounting bracket 401, and the upper clamping arc The plate 409 and the end surface of the lower clamping arc plate 402 are fixedly connected with a rubber pad 410, and the rubber pad 410 abuts against the side wall of the coil 3. The rubber pad 410 can increase the friction force of the lower clamping arc plate 402 and the upper clamping arc plate 409 on the coil 3, thereby improving the clamping effect. The end surface of the rubber pad 410 is fixedly connected with a transverse ridge 411, and the number of transverse ridges 411 is set, and the multiple transverse ridges 411 are evenly spaced and arranged on the end surface of the rubber pad 410.

[0028] In one embodiment of the utility model, the coil 3 is passed into the clamping assembly 4, and the tension spring 406 contracts, driving the telescopic rod 404, the connecting rod 405 and the upper clamping arc plate 409 to move downward, so that the rubber pad 410 abuts against the coil 3, thereby achieving compression of the coil 3, and the rubber pad 410 can fit with the coil 3, and the friction between the rubber pad 410 and the coil 3 prevents the coil 3 from loosening. At the same time, the rubber pad 410 can protect the coil 3 through elastic deformation to prevent the coil 3 from deforming and thus affecting the safety of the equipment. The threaded sleeve 407 is rotated to adjust the longitudinal position of the threaded sleeve 407, and then the maximum retractable distance of the telescopic rod 404 can be adjusted to achieve the adjustment of the clamping force of the coil 3. This adjustment capability can control the degree of compression of the coil 3 according to actual needs to adapt to different working conditions or design requirements of the coil 3, which helps to ensure that the coil 3 will not loosen or move during the operation of the dry-type transformer body 2.

[0029] In addition, in order to improve the clamping effect of the upper clamping arc plate 409 and the lower clamping arc plate 402 on the coil 3, the end face of the rubber pad 410 is fixedly connected with a transverse ridge 411, and the number of the transverse ridges 411 is multiple, and the multiple transverse ridges 411 are evenly spaced on the end face of the rubber pad 410. When the coil 3 is clamped, the friction between the transverse ridges 411 and the surface of the coil can provide additional resistance, so that the coil 3 is more firmly fixed between the upper clamping arc plate 409 and the lower clamping arc plate 402, and the pressure can be more evenly distributed on the surface of the coil 3, which helps to avoid the problem of local stress concentration during the compression process of the coil 3 and reduce the risk of deformation or damage of the coil 3.

[0030] In the present invention, when in use, the coil 3 is passed into the clamping assembly 4, the tension spring 406 contracts, and the telescopic rod 404, the connecting rod 405 and the upper clamping arc plate 409 move downward, so that the rubber pad 410 abuts against the coil 3, thereby achieving compression of the coil 3, and the rubber pad 410 can fit with the coil 3, and the friction between the rubber pad 410 and the coil 3 prevents the coil 3 from loosening. At the same time, the rubber pad 410 can protect the coil 3 through elastic deformation, preventing the coil 3 from deforming and thus affecting the safety of the equipment. The threaded sleeve 407 is rotated to adjust the longitudinal position of the threaded sleeve 407, and then the maximum telescopic distance of the telescopic rod 404 can be adjusted to achieve the adjustment of the clamping force of the coil 3. This adjustment capability can control the degree of compression of the coil 3 according to actual needs to adapt to different working conditions or coil 3 design requirements, which helps to ensure that the coil 3 will not loosen or move during the operation of the dry-type transformer body 2. Furthermore, the end face of the rubber pad 410 is fixedly connected with a transverse ridge 411, and the number of transverse ridges 411 is set in multiples, and the multiple transverse ridges 411 are evenly spaced on the end face of the rubber pad 410. When the coil 3 is clamped, the friction between the transverse ridge 411 and the coil surface can provide additional resistance, so that the coil 3 is more firmly fixed between the upper clamping arc plate 409 and the lower clamping arc plate 402, and the pressure can be more evenly distributed on the surface of the coil 3.

[0031] 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 depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A dry-type transformer with a coil pressing structure, comprising a frame (1), the inner bottom of the frame (1) being fixedly connected to a dry-type transformer body (2), the outer wall of the dry-type transformer body (2) being wound with a coil (3), characterized in that: The inner bottom of the frame (1) is provided with a clamping assembly (4), and the clamping assembly (4) comprises: A mounting frame (401), the inner bottom of the frame (1) being fixedly connected to the mounting frame (401); A lower clamping arc plate (402), the inner bottom of the frame (1) being fixedly connected to the lower clamping arc plate (402); A telescopic rod (404), the top end surface of the frame (1) is fixedly connected to a bracket (403), and the bracket (403) is sleeved with the telescopic rod (404); An upper clamping arc plate (409), the bottom end surface of the telescopic rod (404) is fixedly connected to one end of a connecting rod (405), and the other end of the connecting rod (405) passes through the mounting frame (401) and is fixedly connected to the upper clamping arc plate (409); A threaded sleeve (407), the side wall of the telescopic rod (404) being threadedly connected to the threaded sleeve (407); A limiting plate (408), the side wall of the bracket (403) being fixedly connected to the limiting plate (408); A tension spring (406), wherein the side wall of the connecting rod (405) is provided with a tension spring (406), one end of the tension spring (406) is fixedly connected to the bottom end of the telescopic rod (404), and the other end of the tension spring (406) is fixedly connected to the top end surface of the mounting frame (401); A rubber pad (410), wherein the end surfaces of the upper clamping arc plate (409) and the lower clamping arc plate (402) are fixedly connected with the rubber pad (410).

2. A dry-type transformer with a coil compression structure according to claim 1, characterized in that: The end surface of the rubber pad (410) is fixedly connected with a transverse convex strip (411).

3. The dry-type transformer with a coil compression structure according to claim 1, characterized in that: The rubber pad (410) abuts against the side wall of the coil (3).

4. The dry-type transformer with a coil compression structure according to claim 1, characterized in that: The bottom end of the threaded sleeve (407) abuts against the top end of the limiting plate (408).

5. The dry-type transformer with a coil compression structure according to claim 1, characterized in that: The lower clamping arc plate (402) and the upper clamping arc plate (409) are symmetrically distributed on both sides of the coil (3) with the axis of the coil (3) as the symmetry axis.

6. The dry-type transformer with a coil compression structure according to claim 2, characterized in that: The number of the transverse convex strips (411) is multiple, and the multiple transverse convex strips (411) are arranged at equal intervals on the end surface of the rubber pad (410).

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