Transformer copper insulated wire branching equipment

Abstract

The utility model discloses a transformer copper insulated wire branching device, which relates to the technical field of transformers and comprises a wire clamp, longitudinal cushion blocks and transverse cushion blocks are arranged in the wire clamp in a criss-cross manner, and the longitudinal cushion blocks and the transverse cushion blocks are matched to divide the inside of the wire clamp into a plurality of branching holes; a plurality of branching holes are formed in the base, clamping blocks are fixed around the branching holes, the front sides of the clamping blocks extend to form two side supporting plates, a plurality of abutting peaks and a plurality of over-current valleys are formed on the side supporting plates, and the abutting peaks and the over-current valleys are arranged in a staggered manner. According to the transformer copper insulated wire branching device, the contact area between the wire and the wire clamp, the longitudinal cushion block and the transverse cushion block can be reduced, the heat conduction probability is reduced, the temperature of the transformer copper insulated wire branching device is not prone to rise, meanwhile, the contact area between the surface of the wire and air can be enlarged, the heat dissipation effect on the wire is enhanced, the good heat dissipation effect on the wire is achieved, and the service life of the transformer copper insulated wire branching device is prolonged. And a better separation effect can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a transformer copper insulated wire branching device. Background Technology

[0002] During the neutral point impulse test of an insulated transformer tap changer, the potential difference between the tap changer's start and end points and between electrodes is significant. Therefore, the tap changer routing must comprehensively consider the insulation distances between the tap changer and the tank, coils, etc., as well as the insulation distances between the tap changers themselves. Since the tap changers of a fully insulated transformer inherently have high voltage ratings, the insulation thickness of the tap changers must be selected considering the insulation distances between the tap changers and the tank, coils, etc.

[0003] A search revealed that a patent document with publication number "CN211294851U" discloses a separation structure between transformer tap changer leads, including a wire clamp and a wire bundle consisting of a group of wires clamped by the clamp. A longitudinal insulating pad is provided between two horizontally adjacent wires of the wire bundle to separate them laterally, and a transverse insulating pad is provided between two vertically adjacent wires to separate them longitudinally. Each insulating pad is provided with a fixing structure.

[0004] Based on the above search and combined with existing technology, it was found that although the existing branching structure achieves the function of insulation separation, it is susceptible to the simultaneous influence of multiple wires due to the large amount of contact with the wires, which is not conducive to the heat dissipation of the wires. Therefore, a transformer copper insulated wire branching device is needed. Utility Model Content

[0005] The purpose of this application is to provide a transformer copper insulated wire branching device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a transformer copper insulated wire splitting device, including a wire clamp, wherein the wire clamp is provided with crisscrossing longitudinal pads and transverse pads, the longitudinal pads and transverse pads cooperating to divide the wire clamp into multiple splitting holes;

[0007] All four sides of the branch hole are fixed with a locking block. Two side support plates extend from the front of the locking block. Abutment peaks and flow valleys are formed on the side support plates. Multiple abutment peaks and flow valleys are formed and are arranged in an alternating manner. Multiple abutment peaks contact the conductor points and limit and support the conductors.

[0008] A central groove is formed between the two side support plates, which is aligned with the direction of the conductor extension. Air in the branch hole contacts the surface of the conductor through the central groove and the flow valley.

[0009] Preferably, the side support plate has flow holes at the position corresponding to the abutment peak, and the cross-section of the flow holes is adapted to the cross-section formed by the abutment peak and the flow valley.

[0010] Preferably, the length direction of the card block is consistent with the extension direction of the wire, and a guide rib is fixed at the upper edge of the flow hole. The guide rib extends obliquely along the upper part of the flow hole and is inclined to the outside of the side support plate.

[0011] Preferably, the contact peak makes point contact with the surface of the conductor near the inner side of the groove, and the inner wall of the groove away from the conductor forms a V-shaped groove bottom, which is concave towards the side away from the conductor.

[0012] Preferably, guide notches are provided on both sides of the guide rib, and the guide notches are located at the end of the side support plate corresponding to the bottom wall of the middle tank;

[0013] A crack-resistant reinforcement is formed on the side of the bottom of the V-shaped groove near the opening of the middle groove, and the crack-resistant reinforcement corresponds to the position of the guide notch.

[0014] Preferably, multiple locking blocks are provided and are respectively fixed to the side walls of the wire clamp, the longitudinal pad, and the transverse pad. The locking blocks are fixed to the side walls of the wire clamp, the longitudinal pad, or the transverse pad through an elastic support plate. The elastic support plate is a bent plate body that is recessed into the middle of the locking block and bends when compressed.

[0015] In summary, the technical effects and advantages of this utility model are as follows:

[0016] 1. In this utility model, the wires inside the branching hole are supported by the clip, thereby improving the contact between the wires from line / surface contact to point contact. This reduces the contact area between the wires and the wire clamps, longitudinal pads, and transverse pads, lowering the probability of heat conduction and making it less likely for the transformer copper insulated wire branching device to overheat. On the other hand, it increases the contact area between the wire surface and the air, thereby enhancing the heat dissipation effect on the wires. This is beneficial for achieving good heat dissipation of the wires and providing a better separation effect.

[0017] 2. In this utility model, by setting a guide notch, the side support plate can open in a predetermined direction when squeezed by the wire, thereby avoiding shrinkage that would cause it to lose its limiting function for the wire, ensuring the limiting effect on the wire, and at the same time, it can be used with wires of different diameters, increasing the compatibility range; in addition, the setting of the crack-resistant reinforcement can enhance the structural strength at the junction of the side support plate and the locking block, preventing the root of the side support plate from tearing when it bends, and reducing the probability of damage to the locking block. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure in this embodiment;

[0020] Figure 2 This is a schematic diagram of the first-view structure of the card block in this embodiment;

[0021] Figure 3 This is a schematic diagram of the second-view structure of the card block in this embodiment;

[0022] Figure 4 This is a top view of the card block in this embodiment;

[0023] Figure 5 This is a top sectional view of the card block in this embodiment.

[0024] In the diagram: 1. Wire clamp; 2. Longitudinal pad; 3. Transverse pad; 4. Clamping block; 41. Side support plate; 411. Abutment peak; 412. Flow valley; 413. Flow hole; 42. Middle channel; 421. V-shaped channel bottom; 422. Crack-resistant reinforcement; 43. Guide notch; 44. Flow guide rib; 5. Elastic support plate. Detailed Implementation

[0025] 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.

[0026] Example: Reference Figures 1-5 The transformer copper insulated wire branching device shown includes a wire clamp 1. The wire clamp 1 is provided with longitudinal pads 2 and transverse pads 3 arranged in a crisscross pattern. The longitudinal pads 2 and transverse pads 3 cooperate to divide the wire clamp 1 into multiple branching holes. Multiple wires are respectively passed through the multiple branching holes. Here, the wires refer to the transformer copper insulated wires applicable to transformers in the prior art.

[0027] All four sides of the branch hole are fixed with a locking block 4. Two side support plates 41 extend from the front side of the locking block 4. Abutting peak 411 and flow valley 412 are formed on the side support plate 41. Multiple abutting peaks 411 and flow valleys 412 are formed and are arranged in an alternating manner. Multiple abutting peaks 411 contact the conductor point and limit and support the conductor.

[0028] A central groove 42 is formed between the two side support plates 41, which is aligned with the direction of the conductor extension. Air in the branch hole contacts the surface of the conductor through the central groove 42 and the flow valley 412.

[0029] Based on the above structure, the card block 4 is used to support the wires in the branch hole, thereby improving the contact with the wires from line / surface contact to point (abutment peak 411) contact. This reduces the contact area between the wires and the wire clamp 1, the longitudinal pad 2, and the transverse pad 3, reducing the probability of heat conduction and making it less likely for the transformer copper insulated wire branching equipment to overheat. On the other hand, it increases the contact area between the wire surface and the air, thereby enhancing the heat dissipation effect on the wires. This is beneficial for the wires to have a good heat dissipation effect and can achieve a better separation effect.

[0030] Furthermore, the side support plate 41 has a flow hole 413 at the position corresponding to the abutment peak 411, and the cross section of the flow hole 413 is adapted to the cross section formed by the abutment peak 411 and the flow valley 412.

[0031] The presence of flow holes 413 increases the airflow path, allowing air to contact the conductor from different directions (a channel perpendicular to the central groove 42 is formed between the two flow holes 413, and the interaction between the two allows the air to form a stagnant layer on the surface of the conductor, thereby facilitating more heat exchange) and further enhancing the heat dissipation effect on the surface of the conductor.

[0032] Furthermore, the length direction of the card block 4 is consistent with the extension direction of the wire, and a guide rib 44 is fixed at the upper edge of the flow hole 413. The guide rib 44 extends obliquely along the upper part of the flow hole 413 and is inclined to the outside of the side support plate 41.

[0033] The guide ribs 44 can guide the air flowing along the guide extension direction, so that some of the air enters the flow hole 413 after passing through the guide ribs 44, thereby guiding and separating the airflow, and making it easier for the airflow to pass through the flow hole 413 to form a better heat dissipation effect.

[0034] Furthermore, the contact peak 411 makes point contact with the conductor surface near the inner side of the groove 42, and the inner wall of the groove 42 away from the conductor forms a V-shaped groove bottom 421. The V-shaped groove bottom 421 is recessed towards the side away from the conductor, which can fully prevent other surfaces of the conductor from contacting the inner wall of the groove 42, thus ensuring a reduction in the contact area.

[0035] Furthermore, guide notches 43 are provided on both sides of the guide rib 44, and the guide notches 43 are located at the end of the side support plate 41 corresponding to the bottom wall of the middle channel 42.

[0036] A crack-resistant reinforcement 422 is formed on the side of the V-shaped groove bottom 421 near the opening of the middle groove 42, and the crack-resistant reinforcement 422 corresponds to the position of the guide notch 43.

[0037] By setting the guide notch 43, the side support plate 41 can open in a predetermined direction (i.e., outward) when squeezed by the wire, thereby avoiding the loss of its limiting function for the wire due to contraction, ensuring the limiting effect on the wire, and at the same time, it can be used for wires of different diameters (diameter smaller than the diameter of the branch hole), increasing the compatibility range; in addition, the setting of the crack-resistant reinforcement part 422 can enhance the structural strength at the junction of the side support plate 41 and the locking block 4, preventing the root of the side support plate 41 from tearing when it bends, and reducing the probability of damage to the locking block 4.

[0038] Furthermore, the locking block 4 is provided with multiple blocks and is fixed to the side walls of the wire clamp 1, the longitudinal pad 2, and the transverse pad 3 respectively. The locking block 4 is fixed to the side walls of the wire clamp 1, the longitudinal pad 2, or the transverse pad 3 through the elastic support plate 5. The elastic support plate 5 is a bent plate body that is recessed into the middle of the locking block 4. The elastic support plate 5 bends when pressed. Through the setting of the elastic support plate 5, the locking block 4 can move autonomously within a small range when pressed, thereby better adapting to the separation requirements of wires of different diameters and meeting different wire splitting requirements.

[0039] The working principle of this utility model is as follows: During daily use, the wire passes through the branching hole formed by the wire clamp 1, the longitudinal pad 2, and the transverse pad 3, thus being separated. The wire inside the branching hole is supported by the clamp 4, which improves the contact between the wire and the wire from line / surface contact to point contact. This reduces the contact area between the wire and the wire clamp 1, the longitudinal pad 2, and the transverse pad 3, lowers the probability of heat conduction, and makes it less likely for the transformer copper insulated wire branching device to overheat. On the other hand, it increases the contact area between the wire surface and the air, thereby enhancing the heat dissipation effect on the wire. This is beneficial for the wire to have a good heat dissipation effect and can achieve a better separation effect.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A transformer copper insulated wire splitting device, comprising a wire clamp (1), wherein the wire clamp (1) is provided with longitudinally arranged blocks (2) and transversely arranged blocks (3), the longitudinally arranged blocks (2) and transversely arranged blocks (3) cooperate to divide the wire clamp (1) into multiple splitting holes, characterized in that: All four sides of the branch hole are fixed with a locking block (4). Two side support plates (41) extend from the front side of the locking block (4). Abutment peaks (411) and flow valleys (412) are formed on the side support plates (41). Multiple abutment peaks (411) and flow valleys (412) are formed and are arranged in an alternating manner. Multiple abutment peaks (411) contact the conductor point and limit and support the conductor. A central groove (42) is formed between the two side support plates (41) in the same direction as the extension of the conductor. The air in the branch hole contacts the surface of the conductor through the central groove (42) and the flow valley (412).

2. The transformer copper insulated wire branching device according to claim 1, characterized in that: The side support plate (41) has an overflow hole (413) at the position corresponding to the abutment peak (411), and the cross section of the overflow hole (413) is adapted to the cross section formed by the abutment peak (411) and the overflow valley (412).

3. A transformer copper insulated wire branching device according to claim 2, characterized in that: The length direction of the card block (4) is consistent with the extension direction of the wire. A guide rib (44) is fixed at the upper edge of the flow hole (413). The guide rib (44) extends obliquely along the upper part of the flow hole (413) and the guide rib (44) is inclined to the outside of the side support plate (41).

4. A transformer copper insulated wire branching device according to claim 3, characterized in that: The contact peak (411) is in point contact with the surface of the conductor near the inner side of the middle groove (42). The inner wall of the middle groove (42) away from the conductor forms a V-shaped groove bottom (421), and the V-shaped groove bottom (421) is recessed to the side away from the conductor.

5. A transformer copper insulated wire branching device according to claim 4, characterized in that: The guide rib (44) has guide notches (43) on both sides, and the guide notches (43) are located at the end of the side support plate (41) and the bottom wall of the middle channel (42); The bottom of the V-shaped groove (421) has a crack-resistant reinforcement (422) on the side near the opening of the middle groove (42), and the crack-resistant reinforcement (422) corresponds to the position of the guide notch (43).

6. A transformer copper insulated wire branching device according to claim 1, characterized in that: The card block (4) is provided with multiple card blocks and is fixed to the side walls of the wire clamp (1), the longitudinal pad (2) and the transverse pad (3) respectively. The card block (4) is fixed to the side wall of the wire clamp (1), the longitudinal pad (2) or the transverse pad (3) through the elastic support plate (5). The elastic support plate (5) is a bent plate body that is recessed into the middle of the card block (4). The elastic support plate (5) bends when it is pressed.

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