Transformer winding fastening clamp capable of adaptively adjusting tightness

Abstract

The utility model provides a transformer winding fastening clamp with self-adaptive tightness adjustment, which belongs to the technical field of transformer windings and comprises a base and a pressing frame, the base and the pressing frame are respectively fixed on two sides of a winding through locking components, pressing caps are uniformly arranged at the bottom of the pressing frame, cross-shaped sliding grooves are arranged on the pressing caps, and the cross-shaped sliding grooves are matched with the pressing caps. A four-bar linkage is arranged at the top of the pressing cap, four hinge shafts of the four-bar linkage are sequentially arranged on the inner wall of the cross-shaped sliding groove in a sliding mode, one hinge shaft of the four-bar linkage is stressed through the elastic force of the elastic component, the two anti-loosening frames of the four-bar linkage move relatively, and the anti-loosening frames are attached to the surfaces of coils according to the number of the coils wound on the winding. When the coil is loosened, the position of the anti-loosening frame is automatically adjusted through elastic force, so that the anti-loosening frame is kept at the position attached to the surface of the coil, and the coil is prevented from loosening through automatic position adjustment, so that the overhaul frequency is reduced, and the stable operation of the working environment where the transformer is located is ensured.

Description

Technical Field

[0001] This utility model relates to the field of transformer winding technology, specifically to a transformer winding fastening clamp that adaptively adjusts tightness. Background Technology

[0002] Transformer windings refer to the circuit part of a transformer, made of copper or aluminum wires with high conductivity, and are used in power systems. The windings should have sufficient insulation strength, mechanical strength, and heat resistance.

[0003] A related technology (publication number: CN220796468U) discloses a winding bracket for a transformer. The disclosed technical solution includes: an installation mechanism to facilitate the installation of the winding; a lifting mechanism to assist the installation mechanism in installing and fixing the winding; a fixing mechanism to fix and lock the winding; a heat dissipation mechanism to dissipate heat from the winding; a cooling mechanism to assist the heat dissipation mechanism in dissipating heat from the winding; and a cleaning mechanism to clean the heat dissipation mechanism, thereby improving the heat dissipation efficiency and increasing practicality.

[0004] The above-disclosed technical solutions reveal the following problems: the alternating electromagnetic force generated when the winding is energized can cause winding displacement or vibration, which may lead to insulation wear, inter-turn short circuits or mechanical fatigue fractures in the long run. Therefore, it is necessary to remove the winding and tighten the loose coils again, which affects the normal operation of the transformer's working environment. In response, we propose an adaptive adjustment transformer winding clamp.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background section of this application, and therefore may include prior art information that does not constitute prior art information known to those skilled in the art. Utility Model Content

[0006] This utility model aims to solve at least one of the technical problems existing in the prior art or related technologies. To address the winding fastening problem in the prior art, this utility model provides an adaptively adjustable transformer winding fastening clamp. It combines a winding fastening structure with a coil anti-loosening structure to ensure stable transformer operation. The specific technical solution is as follows:

[0007] An adaptive adjustable transformer winding fastening clamp includes a base and a clamping frame. The base and the clamping frame are respectively fixed to both sides of the winding by a locking assembly. Pressure caps are evenly distributed on the bottom of the clamping frame. A cross groove is formed on the pressure cap. A four-bar linkage is provided on the top of the pressure cap. The four hinge shafts of the four-bar linkage are slidably disposed on the inner wall of the cross groove in sequence. Anti-loosening frames are fixed to the bottom ends of two opposite hinge shafts of the four-bar linkage. One end of the four-bar linkage is disposed on the top of the pressure cap by an elastic member.

[0008] In the above technical solution, a shaping seat for limiting the shape of a four-bar linkage is evenly arranged between the clamping frame and the pressure cap, and a synchronous fastening assembly for driving all shaping seats to move simultaneously is provided on the clamping frame.

[0009] The elastic member includes a docking frame disposed at the top of one end of the four-bar linkage, and an elastic element is disposed between the docking frame and the outer wall of the clamping frame.

[0010] The synchronous fastening assembly includes a lead screw rotatably mounted on the top of the pressure cap, the lead screw passing through the inner cavity of the pressure frame, all the shaping seats being sequentially threaded to the outer wall of the lead screw, and the docking frame being located on the displacement path of the shaping seat.

[0011] The top of the pressure cap is fixed with a guide rod parallel to the lead screw, and all the shaping seats are sequentially sleeved on the outside of the guide rod, with the guide rod penetrating the inner cavity of the pressure frame.

[0012] The top of the base is uniformly fixed with a buffer base, and the bottom of the pressure cap is fixed with a buffer top seat corresponding to the buffer base.

[0013] The locking assembly includes a stud fixed to the top of the clamping frame, an adjusting cap threaded to the outer wall of the stud, a displacement seat rotatably connected to the outer wall of the adjusting cap, one end of a connecting rod evenly fixed to the outer wall of the displacement seat, a fastening seat fixed to the other end of the connecting rod, a connecting post fixed to the side wall of the base, a mating seat fitted onto the outside of the connecting post between two adjacent clamping caps, and the fastening seat fitted onto the outside of the connecting post.

[0014] The outer wall of the adjusting cap is fitted with a support, and ball bearings are evenly arranged circumferentially between the support and the displacement seat.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the adaptive adjustable transformer winding fastening clamp:

[0016] First, place the windings sequentially on the base, then attach the clamping bracket to the top of the windings. Finally, use the locking assembly to fix the windings between the base and the clamping bracket, ensuring the stability of the windings. Adjust the distance between the clamping bracket and the base according to the height of the windings to accommodate windings of different heights.

[0017] Second, by using the synchronous fastening assembly, the three shaping seats move simultaneously towards one end of the four-bar linkage. By moving the left and right ends of the four-bar linkage back to back simultaneously, the front and rear ends of the four-bar linkage move relative to each other, thereby causing the two anti-loosening brackets to move relative to each other to the coil surface. During the process of pressing the coil, the elastic element undergoes elastic deformation, which plays a buffering role. When the coil becomes loose, the elastic force of the elastic element will exert a force on the anti-loosening bracket, thereby preventing the coil from becoming loose. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a transformer winding fastening clamp that can adaptively adjust tightness according to the present invention;

[0019] Figure 2 This is an exploded view of the structure of an adaptive adjustable transformer winding fastening clamp according to the present invention.

[0020] Figure 3 This is a schematic diagram of the clamping frame part of this utility model;

[0021] Figure 4 This is a schematic diagram of the displacement seat and adjusting cap of this utility model;

[0022] Figure 5 for Figure 1 A magnified view of part A;

[0023] in, Figures 1 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1-base, 2-pressure bracket, 3-buffer base, 4-pressure cap, 5-cross slide, 7-four-bar linkage, 8-anti-loosening bracket, 9-displacement seat, 10-stud, 11-adjusting cap, 12-connecting rod, 13-lead screw, 14-connecting column, 15-dating seat, 16-fastening seat, 18-limiting seat, 19-elastic element, 20-slide, 21-moving groove, 22-ball bearing, 23-support, 24-fixed seat, 25-shaping seat, 26-dating bracket, 27-guide rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] The following are specific implementation cases and appendices. Figure 1-5 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0026] An adaptive adjustable transformer winding fastening clamp includes a base 1 and a clamping frame 2, with the base 1 and clamping frame 2 fixed to both sides of the winding via a locking assembly. The windings are placed sequentially on the base 1, then the clamping frame 2 is used to press against the top of the windings. The locking assembly then secures the windings between the base 1 and the clamping frame 2, ensuring the stability of the windings. The distance between the clamping frame 2 and the base 1 can be adjusted according to the height of the windings, thus adapting to windings of different heights.

[0027] The bottom of the clamping frame 2 is evenly provided with clamping caps 4, and each clamping cap 4 has a cross groove 5. Three sub-frames are installed on the bottom of the outer wall of the clamping frame 2, and each sub-frame has a clamping cap 4 fixedly installed at its bottom. Each clamping cap 4 has a cross groove 5 that penetrates the inner cavity. The top of the clamping cap 4 is provided with a four-link 7. The four hinge shafts of the four-link 7 are slidably arranged on the inner wall of the cross groove 5, and the bottom ends of two opposite hinge shafts of the four-link 7 are fixedly connected with anti-loosening frames 8. The four-link 7 is composed of four support rods that are hinged end to end in sequence. Each hinge is rotatably connected by a hinge shaft, so that the four support rods of the four-link 7 can rotate freely. Thus, by pulling two ends in opposite directions, the other two ends of the four-link 7 move synchronously in opposite directions.

[0028] The four hinge shafts of the four-link 7 are respectively fixed to extension shafts at their lower ends, allowing the four extension shafts to slide against the inner walls of the four slots of the cross slide groove 5. A limiting seat 18 is fixed to the bottom end of each extension shaft, fitting against the bottom of the pressure cap 4, allowing the limiting seat 18 to slide against the bottom of the pressure cap 4. Arc-shaped anti-loosening brackets 8 are fixed to the bottom of the limiting seats 18 located at both the left and right ends. One end of the four-link 7 is positioned on top of the pressure cap 4 via an elastic member.

[0029] The elastic force of the elastic component causes one hinge shaft of the four-link 7 to be stressed, which causes the two anti-loosening brackets 8 of the four-link 7 to move relative to each other. According to the number of coils wound on the winding, the anti-loosening brackets 8 are made to fit against the coil surface. When the coil becomes loose, the elastic force ensures that the anti-loosening brackets 8 automatically adjust their position, so that the anti-loosening brackets 8 are kept in the position of fitting against the coil surface. By automatically adjusting the position, the coil is prevented from becoming loose, thereby reducing the frequency of maintenance and ensuring the stable operation of the transformer.

[0030] The clamping frame 2 and the clamping cap 4 are evenly provided with shaping seats 25 for limiting the shape of the four-link 7, and the clamping frame 2 is provided with a synchronous fastening assembly that drives all the shaping seats 25 to move simultaneously. The synchronous fastening assembly causes the three shaping seats 25 to move simultaneously toward one end of the four-link 7. By moving the left and right ends of the four-link 7 back to back at the same time, the front and rear ends of the four-link 7 move relative to each other, thereby causing the two anti-loosening frames 8 to move relative to each other to the coil surface. During the process of clamping the coil, the elastic element 19 undergoes elastic deformation, which plays a buffering role. When the coil becomes loose, the elastic force of the elastic element 19 will exert a force on the anti-loosening frame 8, thereby preventing the coil from becoming loose.

[0031] It is worth noting that the elastic component includes a docking frame 26 disposed at the top of one end of the four-link 7, and an elastic element 19 is disposed between the docking frame 26 and the outer wall of the clamping frame 2. The elastic element 19 can compress the spring, and the two ends of the elastic element 19 are respectively fixed to the opposite surfaces of the clamping frame 2 and the docking frame 26.

[0032] Furthermore, the synchronous fastening assembly includes a lead screw 13 rotatably mounted on top of the pressure cap 4. The lead screw 13 penetrates the inner cavity of the pressure frame 2. All the shaping seats 25 are sequentially threaded onto the outer wall of the lead screw 13, and the mating frame 26 is located on the displacement path of the shaping seats 25. Fixed seats 24 are vertically fixedly installed on the tops of the two pressure caps 4 at both ends. Bearings are installed on the opposite surfaces of the two fixed seats 24 via bearing seats. The two ends of the lead screw 13 are respectively embedded inside the two bearings. A through hole is horizontally opened on the pressure frame 2, penetrating the inner cavity, allowing the lead screw 13 to rotate between the two fixed seats 24 through the through hole.

[0033] Rotating the lead screw 13 causes the three threaded fixing seats 25 to move simultaneously, which in turn pushes the docking frame 26 to move, causing the four-link 7 to drive the two anti-loosening frames 8 to fit against both sides of the coil.

[0034] Additionally, a guide rod 27 parallel to the lead screw 13 is fixedly connected to the top of the pressure cap 4. All the shaping seats 25 are sequentially sleeved on the outside of the guide rod 27, which passes through the inner cavity of the pressure frame 2. The two ends of the guide rod 27 are vertically fixed to the opposite faces of the two fixing seats 24, and the guide rod 27 passes laterally through the inner cavity of the pressure frame 2. The shaping seats 25 slide against the outer wall of the guide rod 27.

[0035] During the process of rotating the lead screw 13 to drive the four-link 7 to deform through the docking frame 26, the shaping seat 25 slides against the outer wall of the guide rod 27. The guide rod 27, which is parallel to the lead screw 13, ensures the stability of the moving direction of the shaping seat 25, thereby ensuring the tightness between the anti-loosening frame 8 and the coil.

[0036] Furthermore, buffer bases 3 are evenly fixed to the top of the base 1, and buffer tops corresponding to the buffer bases 3 are fixed to the bottom of the pressure cap 4. Both the buffer bases 3 and the buffer tops are made of rubber, thus providing protection for both sides of the winding.

[0037] The locking assembly includes a stud 10 fixed to the top of the clamping frame 2. An adjusting cap 11 is threaded onto the outer wall of the stud 10, and a displacement seat 9 is rotatably connected to the outer wall of the adjusting cap 11. The stud 10 is vertically fixed to the top of the clamping frame 2, and the adjusting cap 11 is connected to the stud 10 through a threaded hole at its bottom. The displacement seat 9 rotates against the outer wall of the adjusting cap 11, preventing it from rotating synchronously with the adjusting cap 11 during tightening. One end of a connecting rod 12 is uniformly fixed to the outer wall of the displacement seat 9, and a fastening seat 16 is fixed to the other end of the connecting rod 12. A connecting post 14 is fixed to the side wall of the base 1. A mating seat 15, sleeved on the outside of the connecting post 14, is fixed between two adjacent clamping caps 4, and the fastening seat 16 is also sleeved on the outside of the connecting post 14. The two clamping caps 4 are fixed together by the mating seat 15.

[0038] The three-phase windings are placed on top of the three buffer bases 3 respectively. Then, the clamping frame 2 drives the docking seat 15 to fit over the outside of the connecting post 14. At the same time, the displacement seat 9 drives the fastening seat 16 to fit against the outside of the connecting post 14 through the connecting rod 12, so that the fastening seat 16 fits against the top of the docking seat 15. This allows the buffer top seat to fit against the top of the winding along with the pressure cap 4. Then, the adjusting cap 11 is turned on the outside of the stud 10, causing the adjusting cap 11 to rotate and move. This causes the adjusting cap 11 to move the displacement seat 9, so that the displacement seat 9 drives the fastening seat 16 to fit against the surface of the docking seat 15 through the connecting rod 12. By pushing the docking seat 15 to move, the winding is fixed between the clamping frame 2 and the base 1. During maintenance, the adjusting cap 11 is turned in the opposite direction, which facilitates the maintenance process for relevant personnel.

[0039] A support 23 is fitted onto the outer wall of the adjusting cap 11, and balls 22 are evenly arranged circumferentially between the support 23 and the displacement seat 9. Movable grooves 21 are evenly opened circumferentially on the outer wall of the support 23, and a sliding groove 20 is opened around the inner wall of the displacement seat 9. Balls 22 are movably embedded in each movable cavity formed by each movable groove 21 and sliding groove 20, and the stability of the adjusting cap 11 during rotation is ensured by the balls 22 around the entire circle.

[0040] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] Furthermore, the terms “first,” “second,” “third,” and “fourth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as “first,” “second,” “third,” or “fourth” may explicitly or implicitly include at least one of those features.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-adjusting tensioning transformer winding fastening clamp, characterized by: It includes a base (1) and a clamping frame (2), and the base (1) and the clamping frame (2) are respectively fixed on both sides of the winding by a locking assembly. The bottom of the clamping frame (2) is evenly provided with pressure caps (4), and the pressure caps (4) are provided with cross grooves (5). The top of the pressure caps (4) is provided with a four-link (7). The four hinge shafts of the four-link (7) are sequentially slidably arranged on the inner wall of the cross groove (5), and the bottom ends of two opposite hinge shafts of the four-link (7) are fixed with anti-loosening frames (8). One end of the four-link (7) is set on the top of the pressure cap (4) by an elastic member.

2. A self-adjusting tensioning transformer winding fastening clamp according to claim 1, characterized in that: The clamping frame (2) and the clamping cap (4) are evenly provided with shaping seats (25) for limiting the shape of the four-link (7), and the clamping frame (2) is provided with a synchronous fastening assembly that drives all shaping seats (25) to move simultaneously.

3. A self-adjusting tensioning transformer winding fastening clamp according to claim 2, characterized in that: The elastic member includes a docking frame (26) disposed at the top of one end of the four-link (7), and an elastic element (19) is disposed between the docking frame (26) and the outer wall of the clamping frame (2).

4. A self-adjusting tensioning transformer winding retaining clamp according to claim 3, wherein: The synchronous fastening assembly includes a lead screw (13) rotatably mounted on the top of the pressure cap (4), the lead screw (13) passing through the inner cavity of the pressure frame (2), all the shaping seats (25) being sequentially threaded to the outer wall of the lead screw (13), and the docking frame (26) being located on the displacement path of the shaping seat (25).

5. A self-adjusting tensioning transformer winding fastening clamp according to claim 4, characterized in that: The top of the pressure cap (4) is fixed with a guide rod (27) parallel to the lead screw (13), and all the shaping seats (25) are sequentially sleeved on the outside of the guide rod (27), and the guide rod (27) passes through the inner cavity of the pressure frame (2).

6. The transformer winding fastening clamp with adaptive tension adjustment according to claim 1, characterized in that: The top of the base (1) is uniformly fixed with a buffer base (3), and the bottom of the pressure cap (4) is fixed with a buffer top seat corresponding to the buffer base (3).

7. The transformer winding fastening clamp with adaptive tension adjustment according to claim 1, characterized in that: The locking assembly includes a stud (10) fixed to the top of the clamping frame (2), an adjusting cap (11) is threaded to the outer wall of the stud (10), a displacement seat (9) is rotatably connected to the outer wall of the adjusting cap (11), one end of a connecting rod (12) is uniformly fixed to the outer wall of the displacement seat (9), a fastening seat (16) is fixed to the other end of the connecting rod (12), a connecting post (14) is fixed to the side wall of the base (1), a mating seat (15) is fixed between two adjacent clamping caps (4) and sleeved on the outside of the connecting post (14), and the fastening seat (16) is sleeved on the outside of the connecting post (14).

8. The transformer winding fastening clamp with adaptive tension adjustment according to claim 7, characterized in that: The outer wall of the adjusting cap (11) is fitted with a support (23), and ball bearings (22) are evenly arranged circumferentially between the support (23) and the displacement seat (9).

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