Iron core clamp insulation structure of dry-type power transformer

By using a combined structure of a movable plate, a limiting mechanism and a torsion spring in the transformer core clamp, the problem of screw looseness is solved, the stability and firmness of the core is improved, and the stable state of the core is ensured in long-term use. .

CN222319937UActive Publication Date: 2025-01-07HEFEI YUANZHEN ELECTRIC POWER TECH
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Patent Information

Application Number
CN202421170565.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-27
Publication Date
2025-01-07
Estimated Expiration
2034-05-27

AI Technical Summary

Technical Problem

The existing transformer core clamps are loose due to uneven force and vibration during long-term use, which reduces the stability to the core.

Method used

Using a clamp structure including movable plate, clamp, screw hole, screw, limit rod, slide plate, slide chute, movable plate, tooth strip, tooth, limit block, movable cylinder, spring and torsion spring, through the tooth The engagement and torsion springs increase the movement difficulty and resistance of the moving plate to prevent the screw from loosening.

Benefits of technology

The clamping stability and firmness of the iron core are improved, the screw is loose, and the iron core is in a stable state for a long time.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an iron core clamp insulation structure of a dry-type power transformer, and relates to the technical field of transformer iron core clamps. The iron core fixing device comprises two bases, fixing plates are fixedly connected to the positions, close to the two ends, of the outer surfaces of the upper ends of the two bases, and fixing clamping pieces used for clamping iron cores are arranged between the two fixing plates which correspond to the different bases and are located on the same side. According to the utility model, the teeth I are elastically meshed with the tooth strip, so that the moving difficulty of the moving plate can be increased, the probability that the screw rotates towards the loosening direction is reduced, and the stability and firmness of clamping an iron core are ensured; in addition, by means of the torque force of a torsion spring, the moving plate needs to overcome the torque force of the torsion spring when moving towards the loosening direction of the screw, the moving resistance of the moving plate is further increased, and therefore the stability of the screw in the using process is improved, the situation that the screw is loosened is avoided, and the iron core is in a stable state for a long time.
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Description

Technical Field

[0001] The utility model relates to the technical field of transformer core clamps, in particular to an insulation structure of a core clamp of a dry-type power transformer. Background Art

[0002] The iron core is the main magnetic circuit part of the transformer. It is usually made of hot-rolled or cold-rolled silicon steel sheets with a high silicon content and coated with insulating paint on the surface. The iron core and the coils wound on it form a complete electromagnetic induction system. The power transmitted by the power transformer depends on the material and cross-sectional area of ​​the iron core. The iron core is generally fixed by two upper and lower clamps for easy transportation and installation.

[0003] The transformer clamp is a fastening device used to clamp the transformer core. The clamp consists of an upper clamp and a lower clamp. The fixing purpose is achieved by clamping the upper and lower iron yokes of the transformer.

[0004] In order to prevent the core from short-circuiting in the transformer, the core and the clamp are insulated to ensure the normal operation of the transformer. The insulation material mainly uses layered cardboard or tubular insulation material.

[0005] Existing transformer core clamps usually fix the core by multiple screws and nuts. However, during long-term use, the screws may be worn out due to uneven force or vibration, and thus become loose, reducing their stability to the core. Utility Model Content

[0006] The utility model aims to solve the problems in the prior art and to provide an insulation structure of a core clamp of a dry-type power transformer.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an iron core clamp insulation structure of a dry-type power transformer, comprising two groups of bases, the upper end outer surfaces of the two groups of bases are fixedly connected to the positions near the two ends, and a fixing clamp for clamping the iron core is arranged between the two groups of fixing plates corresponding to different groups of bases but located on the same side;

[0008] The fixing clamp comprises a movable plate, a clamping plate, a screw hole, a screw rod and a limiting rod; a movable plate is arranged on one side of the fixing plate, a clamping plate is fixedly connected between two groups of the movable plates, and a screw hole is opened near the middle of the outer surface of one side of the fixing plate, the inner thread of the screw hole is connected with a screw rod for adjusting the position of the movable plate, and one end of the screw rod passes through the screw hole and is rotatably connected to the movable plate;

[0009] A limiting rod is fixedly connected to the outer surface of one side of the movable plate near the upper and lower ends, and one end of the limiting rod passes through the fixed plate and is movably connected to it. A limiting mechanism is arranged between the two groups of movable plates corresponding to the same group of bases.

[0010] Furthermore, the limiting mechanism includes a slide plate, a slide groove, a mounting groove and a movable plate; a slide groove is provided on the upper outer surface of the base, and the slide plate is fixedly connected to the lower outer surface of the movable plate, the slide plate is slidably connected to the slide groove, and a mounting groove is provided on the outer surface of one side of the slide plate, and the movable plate is slidably connected to the inside of the mounting groove, and one end of the movable plate passes through the inside of the slide groove, and the two groups of movable plates located in the same group of slide grooves are at different heights.

[0011] Furthermore, a support block is fixedly connected to a position near the middle of the bottom end of the inner surface of the slide groove, and a plurality of groups of toothed bars are fixedly connected to the outer surfaces on both sides of the support block at equal distances, and tooth one is fixedly connected to a position corresponding to the toothed bar on one side of the outer surface of the movable plate, and tooth one is fixedly connected to the toothed bar.

[0012] Furthermore, a side of the outer surface of the movable plate away from tooth 1 is fixedly connected to a limiting block, and an outer surface of the limiting block is movably connected to a movable cylinder, a spring 1 is arranged inside the movable cylinder, and one end of the spring 1 is fixedly connected to the movable cylinder, and the other end is fixedly connected to the limiting block, and an outer surface of one side of the movable cylinder is in contact with an inner surface of the slide groove.

[0013] Furthermore, the bottom end of the inner surface of the slide groove is rotatably connected to a rotating shaft at both sides of the support block, and the upper end outer surface of the rotating shaft is fixedly connected to a gear, and the gear corresponds to the movable plate one by one, and the gear is meshed with the corresponding teeth.

[0014] Furthermore, a torsion spring is sleeved on the outer surface of the rotating shaft near the bottom end, and one end of the torsion spring is fixedly connected to the rotating shaft, and the other end is fixedly connected to the sliding groove.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] In the utility model, by arranging the elastic meshing of the tooth one with the tooth bar, the difficulty of moving the movable plate can be increased, thereby reducing the probability of the screw rod rotating in the loosening direction, and ensuring the stability and firmness of the iron core clamping; in addition, the torque force of the torsion spring is utilized, so that the movable plate needs to overcome the torque force of the torsion spring when moving in the loosening direction of the screw rod, further increasing the resistance to the movement of the movable plate, thereby improving the stability of the screw rod during use, avoiding the occurrence of screw rod loosening, and keeping the iron core in a stable state for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a combined view of the slide plate and the slide groove of the utility model;

[0019] Figure 3 For the utility model Figure 2 A magnified view of region A;

[0020] Figure 4 It is a structural schematic diagram of the limiting mechanism of the utility model;

[0021] Figure 5 For the utility model Figure 4 A magnified view of region B;

[0022] Figure 6 This is a combined view of the gear and tooth 1 of the utility model.

[0023] : 1. base; 2. fixed plate; 3. fixed clamp; 31. movable plate; 32. clamping plate; 33. screw hole; 34. screw rod; 35. limit rod; 4. limit mechanism; 401. slide plate; 402. slide groove; 403. mounting groove; 404. movable plate; 405. support block; 406. tooth bar; 407. tooth one; 408. limit block; 409. movable cylinder; 410. spring one; 5. rotating shaft; 6. gear; 7. torsion spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1:

[0026] like Figure 1 and Figure 2 As shown, the utility model proposes an iron core clamp insulation structure of a dry-type power transformer, comprising two groups of bases 1, the upper end outer surfaces of the two groups of bases 1 are fixedly connected with fixing plates 2 near both ends, and a fixing clamp 3 for clamping the iron core is arranged between the two groups of fixing plates 2 corresponding to different groups of bases 1 but located on the same side, the iron core is installed between the two groups of fixing clamps 3, and the lower surface thereof is fitted with the base 1, and then the distance between the two groups of fixing clamps 3 is adjusted so that the two groups of fixing clamps 3 clamp and fix the iron core.

[0027] The fixing clamp 3 includes a movable plate 31, a clamping plate 32, a screw hole 33, a screw rod 34 and a limiting rod 35; a movable plate 31 is provided on one side of the fixing plate 2, a clamping plate 32 is fixedly connected between two groups of movable plates 31, and a screw hole 33 is provided on the outer surface of one side of the fixing plate 2 near the middle, and the internal thread of the screw hole 33 is connected with a screw rod 34 for adjusting the position of the movable plate 31, and the two groups of screw rods 34 on the same side are rotated at the same time, and one end of the screw rod 34 passes through the screw hole 33 and is rotatably connected to the movable plate 31.

[0028] The screw rod 34 pushes the movable plate 31 and the clamping plate 32 away from the fixed plate 2 while rotating clockwise, so that the clamping plate 32 and the movable plate 31 are close to the iron core. After the adjustment of the fixed clamp 3 on one side is completed, the movable plate 31 and the clamping plate 32 on the other side are adjusted according to the above steps to fix the iron core.

[0029] The outer surface of one side of the movable plate 31 is fixedly connected to the position near the upper and lower ends to ensure the stability of the movable plate 31 during movement, and one end of the limit rod 35 passes through the fixed plate 2 and is movably connected thereto.

[0030] Embodiment 2:

[0031] like Figure 2-6 As shown, the difference between this embodiment and embodiment 1 is that a limiting mechanism 4 is arranged between the two groups of movable plates 31 corresponding to the same group of bases 1, and the limiting mechanism 4 includes a slide plate 401, a slide groove 402, a mounting groove 403 and a movable plate 404; a slide groove 402 is provided on the upper outer surface of the base 1, and a slide plate 401 is fixedly connected to the lower outer surface of the movable plate 31, the slide plate 401 is slidably connected to the slide groove 402, and a mounting groove 403 is provided on the outer surface of one side of the slide plate 401, and the inside of the mounting groove 403 is slidably connected to the movable plate 404, and one end of the movable plate 404 penetrates into the inside of the slide groove 402, and when the movable plate 31 moves toward the iron core, the slide plate 401 drives the movable plate 404 to move along the slide groove 402 with it.

[0032] The two groups of movable plates 404 located in the same group of slide grooves 402 are at different heights, a support block 405 is fixedly connected to a position near the middle of the bottom end of the inner surface of the slide groove 402, and a plurality of groups of toothed bars 406 are fixedly connected to the outer surfaces of both sides of the support block 405 at equal distances, a tooth 1 407 is fixedly connected to a position corresponding to the toothed bar 406 on one side of the outer surface of the movable plate 404, and the tooth 1 407 is fixedly connected to the toothed bar 406, and the tooth 1 407 is fixedly connected to the toothed bar 406. When the tooth 1 407 is opposite to the toothed bar 406, the movable plate 404 squeezes the spring 1 410 under the resistance of the toothed bar 406, and when the tooth 1 407 is misaligned with the toothed bar 406, the tooth 1 407 is meshed with the toothed bar 406, and the movement difficulty of the movable plate 404 is increased through the cooperation of the tooth 1 407, the toothed bar 406 and the spring 1 410.

[0033] Embodiment three:

[0034] like Figure 2 , Figure 3 and Figure 6 As shown, the difference between this embodiment and embodiment 1 and embodiment 2 lies in that the outer surface of the movable plate 404 is fixedly connected to a limiting block 408 on one side away from the tooth 407, and the outer surface of the limiting block 408 is movably connected to a movable cylinder 409, a spring 410 is arranged inside the movable cylinder 409, and one end of the spring 410 is fixedly connected to the movable cylinder 409, and the other end is fixedly connected to the limiting block 408, and the outer surface of one side of the movable cylinder 409 is in contact with the inner surface of the slide groove 402.

[0035] The bottom end of the inner surface of the slide groove 402 is located on both sides of the support block 405 and is rotatably connected to the rotating shaft 5. A torsion spring 7 is sleeved on the outer surface of the rotating shaft 5 near the bottom end, and one end of the torsion spring 7 is fixedly connected to the rotating shaft 5, and the other end is fixedly connected to the slide groove 402. When the slide plate 401 is located at one end of the slide groove 402, the torsion spring 7 is in a tightened state. When one end of the moving plate 404 conflicts with the other end of the slide groove 402, the torsion spring 7 returns to its original state.

[0036] A gear 6 is fixedly connected to the outer surface of the upper end of the rotating shaft 5, and the gear 6 corresponds to the movable plate 404 one by one, and the gear 6 is meshed with the corresponding tooth 1 407. When the screw 34 tends to rotate in the loose direction, the movable plate 404 is required to overcome the torque force of the torsion spring 7 to rotate the rotating shaft 5, and when the tooth bar 406 is separated from the tooth 1 407, the gear 6 is still meshed with the tooth 1 407.

[0037] The working process and principle of the utility model are as follows:

[0038] Step 1: First, install the iron core between the two sets of fixing clamps 3, and make its lower surface fit with the base 1, and then adjust the distance between the two sets of fixing clamps 3 so that the two sets of fixing clamps 3 clamp and fix the iron core;

[0039] Step 2: During adjustment, the two sets of screw rods 34 on the same side are rotated simultaneously. The screw rods 34 push the movable plate 31 and the clamping plate 32 away from the fixed plate 2 while rotating clockwise, so that the clamping plate 32 and the movable plate 31 are close to the iron core. After the adjustment of the fixed clamp 3 on one side is completed, the movable plate 31 and the clamping plate 32 on the other side are adjusted according to the above steps, so as to fix the iron core. After the fixing is completed, the iron core and the clamping plate 32 are further connected with a cable tie;

[0040] Step 3, when the movable plate 31 moves toward the iron core, the slide plate 401 drives the movable plate 404 to move along the slide groove 402, and the tooth 1 407 repeatedly corresponds and meshes with the tooth bar 406. When the tooth 1 407 is opposite to the tooth bar 406, the movable plate 404 squeezes the spring 1 410 under the resistance of the tooth bar 406. When the tooth 1 407 is misaligned with the tooth bar 406, the tooth 1 407 meshes with the tooth bar 406. Through the cooperation of the tooth 1 407, the tooth bar 406 and the spring 1 410, the difficulty of moving the movable plate 404 is increased, thereby reducing the probability of the screw 34 rotating in the loose direction, ensuring the stability and firmness of the iron core clamping;

[0041] Step 4. During the movement of the movable plate 404, the driving gear 6 drives the rotating shaft 5 to rotate, and the gear 6 is always engaged with the movable plate 404. When the slide plate 401 is located at one end of the slide groove 402, the torsion spring 7 is in a tightened state. When one end of the movable plate 404 conflicts with the other end of the slide groove 402, the torsion spring 7 returns to its original state. Therefore, when the screw 34 tends to rotate in the loose direction, the movable plate 404 is required to overcome the torque force of the torsion spring 7 to rotate the rotating shaft 5, which further increases the difficulty of moving the movable plate 404, thereby avoiding the screw 34 from loosening and keeping the iron core in a stable state for a long time.

[0042] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A core clamp insulation structure for a dry-type power transformer, comprising two sets of bases (1), characterized in that: The upper outer surfaces of the two groups of bases (1) are fixedly connected to fixing plates (2) at positions near both ends, and a fixing clamp (3) for clamping the iron core is provided between the two groups of fixing plates (2) corresponding to different groups of bases (1) but located on the same side; The fixing clamp (3) comprises a movable plate (31), a clamping plate (32), a screw hole (33), a screw rod (34) and a limiting rod (35); a movable plate (31) is arranged on one side of the fixing plate (2); a clamping plate (32) is fixedly connected between two groups of the movable plates (31); a screw hole (33) is provided on the outer surface of one side of the fixing plate (2) near the middle; a screw rod (34) for adjusting the position of the movable plate (31) is connected to the inner thread of the screw hole (33); one end of the screw rod (34) passes through the screw hole (33) and is rotatably connected to the movable plate (31); A limiting rod (35) is fixedly connected to the outer surface of one side of the movable plate (31) near the upper and lower ends, and one end of the limiting rod (35) passes through the fixed plate (2) and is movably connected thereto. A limiting mechanism (4) is provided between two groups of movable plates (31) corresponding to the same group of bases (1).

2. The core clamp insulation structure of a dry-type power transformer according to claim 1, characterized in that: The limiting mechanism (4) comprises a slide plate (401), a slide groove (402), a mounting groove (403) and a movable plate (404); the upper outer surface of the base (1) is provided with a slide groove (402), and the lower outer surface of the movable plate (31) is fixedly connected with the slide plate (401), the slide plate (401) is slidably connected with the slide groove (402), and the outer surface of one side of the slide plate (401) is provided with a mounting groove (403), and the interior of the mounting groove (403) is slidably connected with the movable plate (404), and one end of the movable plate (404) passes through the interior of the slide groove (402), and the two groups of movable plates (404) located in the same group of slide grooves (402) are at different heights.

3. The core clamp insulation structure of a dry-type power transformer according to claim 2, characterized in that: A support block (405) is fixedly connected to a position near the middle of the bottom end of the inner surface of the slide groove (402), and a plurality of groups of toothed bars (406) are fixedly connected to the outer surfaces of both sides of the support block (405) at equal distances, and a toothed bar (407) is fixedly connected to a position corresponding to the toothed bar (406) on one side of the outer surface of the movable plate (404), and the toothed bar (407) is fixedly connected to the toothed bar (406).

4. The core clamp insulation structure of a dry-type power transformer according to claim 3, characterized in that: The side of the outer surface of the movable plate (404) away from the tooth 1 (407) is fixedly connected to a limiting block (408), and the outer surface of the limiting block (408) is movably connected to a movable cylinder (409), a spring 1 (410) is arranged inside the movable cylinder (409), and one end of the spring 1 (410) is fixedly connected to the movable cylinder (409), and the other end is fixedly connected to the limiting block (408), and the outer surface of one side of the movable cylinder (409) is in contact with the inner surface of the slide groove (402).

5. The core clamp insulation structure of a dry-type power transformer according to claim 3, characterized in that: The bottom end of the inner surface of the slide groove (402) is located at the positions on both sides of the support block (405) and is rotatably connected to a rotating shaft (5), and the outer surface of the upper end of the rotating shaft (5) is fixedly connected to a gear (6), and the gear (6) corresponds to the movable plate (404) one by one, and the gear (6) is meshed with the corresponding tooth one (407).

6. The core clamp insulation structure of a dry-type power transformer according to claim 5, characterized in that: A torsion spring (7) is sleeved on the outer surface of the rotating shaft (5) near the bottom end, and one end of the torsion spring (7) is fixedly connected to the rotating shaft (5), and the other end is fixedly connected to the sliding groove (402).