High-voltage lead structure of an explosion-proof transformer

Abstract

The utility model discloses a kind of high-voltage lead structures of explosion-proof transformer, including wire clamp fixed boss, coil wire outlet terminal boss, wire clamp and lead cable with wiring nose;The wire clamp fixed boss, coil wire outlet terminal boss are set on coil outside and integrally formed when coil pouring;The wire clamp fixed boss is fixedly connected with wire clamp by bolt, and the wire clamp fixed boss, coil wire outlet terminal boss are all embedded with threaded sleeve;The lead cable with wiring nose is fastened with the threaded sleeve in the coil wire outlet terminal boss on pouring high-voltage coil by copper bolt. It is aimed at solving the problems of lead welding, lead fixing, appearance aesthetic property, assembly, maintenance convenience and the like in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof transformer technology, specifically to a high-voltage lead connection and fixing structure. Background Technology

[0002] Currently, such as Figure 1 As shown, existing explosion-proof transformers connect their high-voltage leads to the high-voltage coil outlets via cables welded together. The cables are secured by welding brackets to clamps, fixing the wire clamps to the brackets, and then binding the lead cables to the wire clamps. This structural method has several drawbacks: First, it increases the overall size of the transformer due to the increased insulation distance between the brackets and the coils. Second, each coil has four welding points, increasing the risk of incomplete welds, and each weld requires re-insulation, increasing material and labor costs and complicating manufacturing. Third, the dispersed coil outlets result in a messy appearance due to the multiple leads. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a high-voltage lead structure for an explosion-proof transformer, which aims to solve the problems of lead welding, lead fixing, appearance, assembly and maintenance in the prior art.

[0004] To solve the above-mentioned technical problems, this utility model provides a high-voltage lead structure for an explosion-proof transformer, including a wire clamp fixing boss, a coil output terminal boss, a wire clamp, and a lead cable with a lug. The wire clamp fixing boss and the coil output terminal boss are disposed on the outside of the coil and integrally formed during coil casting. The wire clamp fixing boss and the wire clamp are fixedly connected by bolts, and threaded sleeves are pre-embedded in both the wire clamp fixing boss and the coil output terminal boss. The lead cable with a lug is fastened to the threaded sleeve inside the coil output terminal boss on the cast high-voltage coil by copper bolts.

[0005] The circular boss cast together with the coil during molding serves as the mounting hole for fixing the wire clamp, eliminating the need to weld the wire clamp support device onto the transformer clamp. The transformer coil leads are no longer connected to the leads by welding, eliminating the phenomenon of weak or incomplete welding, and also eliminating the need for the insulation process of the leads after welding. This makes the lead arrangement more regular and the assembly simpler and more convenient.

[0006] Further optimization involves having two wire clamp fixing bosses, distributed at the upper and lower ends of the high-voltage coil.

[0007] Further optimization involves four coil output terminal bosses, one of which is located at the upper end of the high-voltage coil, and the other three are distributed sequentially from top to bottom at the lower end of the high-voltage coil.

[0008] Further optimization involves the wire clamp being a long strip structure made of insulating material, with connecting holes at both ends. The diameter of the connecting holes matches the threaded sleeve inside the fixing boss of the wire clamp. The wire clamp has multiple cable fixing slots, wherein the inner diameter of the cable fixing slot at the upper end of the wire clamp is the same as the outer diameter of the cable, and the cable fixing slot at the lower end of the wire clamp can accommodate multiple cables.

[0009] In a further optimization, a cable fixing block is fixedly installed in the cable fixing groove at the lower end of the wire clamp.

[0010] Further optimization involves providing multiple cable threading and fixing holes on the cable fixing block.

[0011] The beneficial effects of this utility model are as follows: Through the design of this utility model, the overall lead wire structure greatly simplifies the assembly process. All connection points are fastened with bolts, eliminating the need for welding and insulation wrapping, thus saving materials and labor time. When maintenance is required, the fastening bolts can be removed without the need to melt the welding points with gas welding. Since the lead wires are centrally led out, the overall structure is neat and aesthetically pleasing. There is no need to weld wire clamp brackets, reducing the overall size and ensuring the reliability and stability of the product performance. Attached Figure Description

[0012] Figure 1 A structural diagram of existing technology products; Figure 2 This is a schematic diagram of the structure of the present invention applied to a product; Figure 3 This is a structural diagram of the coil casting boss of this utility model; Figure 4 This is a structural diagram of the internal threaded sleeve with a boss in this utility model; Figure 5 This is a schematic diagram of the wire clamp installation structure of this utility model. Detailed Implementation

[0013] The present invention will now be described in detail with reference to the accompanying drawings.

[0014] like Figure 2-5 As shown, the explosion-proof transformer high-voltage lead structure of this utility model is set on the high-voltage coil 6, including a wire clamp fixing boss 1, a coil output terminal boss 2, a wire clamp 3, and a lead cable 4 with a connector lug; the wire clamp fixing boss 1 and the coil output terminal boss 2 are set on the outside of the coil and integrally formed during coil casting; the wire clamp fixing boss 1 and the wire clamp 3 are fixedly connected by bolts, and threaded sleeves 5 are pre-embedded in the wire clamp fixing boss 1 and the coil output terminal boss 2; the lead cable 4 with a connector lug is fastened to the threaded sleeve in the coil output terminal boss 2 on the cast high-voltage coil by copper bolts.

[0015] In this embodiment, there are two wire clamp fixing bosses 1, which are distributed at the upper and lower ends of the high-voltage coil.

[0016] In this embodiment, there are four coil output terminal bosses, one of which is located at the upper end of the high-voltage coil, and the other three are located at the lower end of the high-voltage coil from top to bottom; the threaded sleeve inside each coil output terminal boss is connected to the end of the coil protrusion inside the casting layer.

[0017] In this embodiment, the wire clamp 3 is a long strip structure made of insulating material, with connecting holes at both ends. The diameter of the connecting holes matches the threaded sleeve inside the wire clamp fixing boss. The wire clamp 3 has multiple cable fixing grooves, wherein the inner diameter of the cable fixing groove at the upper end of the wire clamp 3 is the same as the outer diameter of the cable, and the cable fixing groove at the lower end of the wire clamp 3 can accommodate multiple cables.

[0018] In this embodiment, a cable fixing block 31 is fixedly provided in the cable fixing groove at the lower end of the wire clamp 3.

[0019] In this embodiment, the cable fixing block 31 is provided with a plurality of cable threading fixing holes 32 for fixing a plurality of lead cables.

[0020] This invention uses a circular boss cast together with the coil during molding as the mounting hole for fixing the wire clamp, eliminating the need to weld a wire clamp support device to the transformer clamp. The transformer coil lead wires are no longer connected to the lead wires by welding, eliminating the phenomenon of weak welding and incomplete soldering, and also eliminating the need for the wrapping and insulation process of the lead wires after welding. This makes the lead wire arrangement more regular and the assembly simpler and more convenient.

[0021] Coil manufacturing stage: In the high-voltage coil mold, a wire clamp fixing boss 1 and a coil output terminal boss 2 are pre-set, and a threaded sleeve is simultaneously embedded when the epoxy resin is poured. The internal threaded sleeve of the terminal boss is pre-connected to the end of the coil by conductive adhesive or welding (hidden within the casting layer).

[0022] Lead assembly stage: The wire clamp 3 is fixed to the boss 1 with bolts, and the lead cable is inserted into the slot; The lead cable end lug and terminal boss threaded sleeve are fastened with copper bolts. The lead wire in the groove is fixed with cable fixing block 31 or tied with epoxy semi-dry adhesive tape and then inserted into the cable fixing groove.

[0023] Through the design of this utility model, the overall lead wire structure greatly simplifies the assembly process. All connection points are fastened with bolts, eliminating the need for welding and insulation wrapping, thus saving materials and labor time. When maintenance is required, the fastening bolts can be removed without the need to melt the welding points with gas welding. Since the lead wires are centrally led out, the overall structure is neat and aesthetically pleasing. There is no need to weld wire clamp brackets, reducing the overall size and ensuring the reliability and stability of the product performance.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A high-voltage lead structure for an explosion-proof transformer, characterized in that: It includes a wire clamp fixing boss (1), a coil output terminal boss (2), a wire clamp (3), and a lead cable (4) with a wiring lug; the wire clamp fixing boss (1) and the coil output terminal boss (2) are set on the outside of the coil and are integrally formed during the coil casting; the wire clamp fixing boss (1) and the wire clamp (3) are fixedly connected by bolts, and threaded sleeves (5) are pre-embedded in the wire clamp fixing boss (1) and the coil output terminal boss (2); the lead cable (4) with a wiring lug is fastened to the threaded sleeve in the coil output terminal boss (2) on the cast high voltage coil by copper bolts.

2. The explosion-proof transformer high-voltage lead structure according to claim 1, characterized in that: There are two wire clamp fixing bosses (1), which are distributed at the upper and lower ends of the high voltage coil.

3. The explosion-proof transformer high-voltage lead structure according to claim 1, characterized in that: The coil output terminal boss (2) consists of 4 parts, one of which is located at the upper end of the high voltage coil, and the other three are located at the lower end of the high voltage coil from top to bottom.

4. The explosion-proof transformer high-voltage lead structure according to claim 1, characterized in that: The wire clamp (3) is a long strip structure made of insulating material, with connecting holes at both ends. The diameter of the connecting holes matches the threaded sleeve inside the fixing boss of the wire clamp. The wire clamp (3) has multiple cable fixing slots. The inner diameter of the cable fixing slot at the upper end of the wire clamp (3) is the same as the outer diameter of the cable. The cable fixing slot at the lower end of the wire clamp (3) can accommodate multiple cables.

5. The explosion-proof transformer high-voltage lead structure according to claim 4, characterized in that: A cable fixing block is fixedly installed in the cable fixing groove at the lower end of the wire clamp (3).

6. The explosion-proof transformer high-voltage lead structure according to claim 5, characterized in that: The cable fixing block is provided with multiple cable threading and fixing holes.

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