A transformer anti-loosening terminal

Abstract

This utility model discloses a transformer anti-loosening terminal block for use in transformer wiring. The terminal block is designed as an integrated cylindrical section and a variable-diameter section, with the diameter of the variable-diameter section gradually decreasing towards the side furthest from the cylindrical section. A metal wire is wound around the variable-diameter section. When the terminal block heats up significantly, it undergoes a slight expansion. This expansion causes the metal wire to move towards the side of the variable-diameter section with a smaller diameter. When the heat subsides, a reset component causes the positioning clamp to move the metal wire towards the cylindrical section, ensuring a stable fit between the metal wire and the terminal block and preventing loosening. The limiting slide rod and positioning post effectively prevent the axis of the positioning clamp from shifting from the axis of the terminal block, thus ensuring a stable pressing effect of the elastic positioning pad on the metal wire.

Description

Technical Field

[0001] This utility model relates to the field of transformer wiring, and in particular to a transformer anti-loosening terminal block. Background Technology

[0002] Transformer terminals are metal components used to achieve circuit connections. They are typically made of copper, aluminum, or iron and are fixed inside or outside the transformer by insulating materials. Their core function is to connect wires to the internal circuitry of the equipment, ensuring the stability and safety of current transmission.

[0003] To address the aforementioned issues, a search revealed, for example, a mining transformer terminal block disclosed in patent publication number CN211654541U, comprising a porcelain bushing, epoxy resin, an inner copper sleeve, an explosion-proof flange, a first gasket, a second gasket, a nut, and a conductive rod. The porcelain bushing has a through hole at its right end, the conductive rod is horizontally inserted into the through hole, the inner copper sleeve is fitted over the conductive rod and inserted into the through hole, epoxy resin fills the inside of the right end of the through hole and covers the outside of the inner copper sleeve and the conductive rod, and the explosion-proof flange is screwed onto the outside of the left end of the porcelain bushing. The metal wires of the multi-strand cable are pressed between the first and second gaskets, ensuring a secure and stable connection.

[0004] However, since the metal wire is directly pressed onto the conductive rod by the gasket, the conductive rod will generate a certain amount of heat when a large current passes through it during use, and the heat generated will be relatively small when the current is small. This repeated thermal expansion and contraction can easily cause the screws and gaskets of the terminal to loosen, which in turn leads to poor contact of the terminal. Utility Model Content

[0005] The core of this invention lies in solving the problem of loose terminals in existing technologies through the coordinated design of a variable diameter section and a reset component. It also facilitates wiring.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A transformer anti-loosening terminal includes a conductor post and a porcelain bushing sleeved on the outside of the conductor post; The conductor post includes an integrally formed cylindrical section and a variable diameter section. The diameter of the variable diameter section gradually decreases towards the side away from the cylindrical section, and a metal wire is wound on the variable diameter section. A positioning clamp is fitted on the outer side of the metal wire section, which presses the metal wire section tightly onto the variable diameter section. A reset assembly is installed at the end of the variable diameter section away from the cylindrical section, and the reset assembly is connected to the positioning hoop.

[0008] By winding the metal wire around the variable diameter section, when the conductor post heats up severely, the conductor post expands slightly due to the heat. At this time, the metal wire will move towards the side with the smaller diameter of the variable diameter section due to this expansion. When the conductor post heats up less, the reset component can cause the positioning clamp to move the metal wire towards the cylindrical section, thereby ensuring a stable fit between the metal wire and the conductor post and preventing loosening.

[0009] Furthermore, the reset assembly includes a limiting block and a compression spring. The limiting block is coaxially fixed to the end of the variable diameter section away from the cylindrical section, and the compression spring is disposed between the positioning hoop and the limiting block.

[0010] Furthermore, one end of the compression spring is fixed to the limiting block, and the other end of the compression spring is fixed with a pressure ring. The pressure ring abuts against the positioning hoop, and a limiting slide rod is fixed to the end face of the pressure ring away from the positioning hoop. The limiting slide rod is coaxially arranged with the variable diameter section, and a limiting groove is provided on the limiting block for the limiting slide rod to slide into.

[0011] Furthermore, the positioning hoop includes two positioning half-hoops and two elastic positioning pads. The two positioning half-hoops form a ring around the outside of the metal wire part, and the two positioning half-hoops are fixed together by fixing bolts. The two elastic positioning pads are respectively fixed on the inner wall of the two positioning half-hoops and are in contact with the metal wire part.

[0012] Furthermore, a positioning pin is fixed to the end face of the pressure ring away from the compression spring, and a positioning hole for the positioning pin to be inserted is provided on the side end of the positioning half hoop.

[0013] Furthermore, the positioning clamp, limiting block, and pressure ring are all made of insulating and heat-insulating materials.

[0014] Compared with existing technologies, the advantages of this utility model are: (1) This solution involves winding the metal wire on the variable diameter section. When the conductor post heats up severely, the conductor post expands slightly due to the heat. At this time, the metal wire will move towards the side with the smaller diameter of the variable diameter section due to this expansion. When the conductor post heats up less, the reset component can cause the positioning clamp to move the metal wire towards the cylindrical section, thereby ensuring a stable fit between the metal wire and the conductor post and preventing loosening.

[0015] (2) This solution can effectively prevent the axis of the positioning hoop from deviating from the axis of the guide post by setting the limiting slide rod and the positioning post, thereby ensuring the stable pressing effect of the elastic positioning pad on the metal wire. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 2 This is a schematic diagram of the disassembled structure of this utility model; Figure 3 This is a schematic diagram of the front cross-sectional structure of the present invention; Figure 4 This is a schematic diagram of the structure of the reset component of this utility model; Figure 5 This is a schematic diagram of the structure of the pressure ring of this utility model.

[0017] Explanation of the labels in the diagram: 1. Guide post; 11. Cylindrical section; 12. Variable diameter section; 2. Porcelain bushing; 3. Metal wire section; 4. Positioning clamp; 41. Positioning half clamp; 4101. Positioning hole; 42. Elastic positioning pad; 43. Fixing bolt; 5. Limiting block; 501. Limiting groove; 6. Compression spring; 7. Pressure ring; 8. Limiting slide rod; 9. Positioning post. Detailed Implementation

[0018] The technical solution will now be clearly and completely described with reference to the accompanying drawings in the embodiments of this utility model.

[0019] First implementation method: Please see Figures 1-4 A transformer anti-loosening terminal includes a conductor post 1 and a conventional porcelain bushing 2 sleeved on the outside of the conductor post 1. The conductor post 1 includes an integrally formed cylindrical section 11 and a variable diameter section 12. The diameter of the variable diameter section 12 gradually decreases towards the side away from the cylindrical section 11. A metal wire portion 3 is wound on the variable diameter section 12. A positioning clamp 4 is sleeved on the outside of the metal wire portion 3. The positioning clamp 4 presses the metal wire portion 3 tightly onto the variable diameter section 12. A reset assembly is installed at the end of the variable diameter section 12 away from the cylindrical section 11. The reset assembly is connected to the positioning clamp 4.

[0020] This solution involves winding the metal wire 3 around the variable diameter section 12. When the conductor post 1 heats up severely, it expands slightly due to the heat. At this time, the metal wire 3 will move towards the side with the smaller diameter of the variable diameter section 12 due to this expansion. When the heat of the conductor post 1 decreases, the reset component can cause the positioning clamp 4 to move the metal wire 3 towards the cylindrical section 11, thereby ensuring a stable fit between the metal wire 3 and the conductor post 1 and preventing loosening.

[0021] The reset assembly includes a limiting block 5 and a compression spring 6. The limiting block 5 is coaxially fixed to the end of the variable diameter section 12 away from the cylindrical section 11. The compression spring 6 is disposed between the positioning hoop 4 and the limiting block 5. When the wire part 3 moves toward the side with the smaller diameter of the variable diameter section 12 due to the expansion of the guide post 1, the compression spring 6 is compressed. When the heat of the guide post 1 is reduced, the compression spring 6 resets the wire part 3.

[0022] The positioning clamp 4 includes two positioning half clamps 41 and two elastic positioning pads 42. The two positioning half clamps 41 form a ring around the outside of the metal wire part 3 and are fixed together by fixing bolts 43. The two elastic positioning pads 42 are respectively fixed on the inner wall of the two positioning half clamps 41 and are in contact with the metal wire part 3. The elastic positioning pads 42 can be made of conventional rubber material to facilitate the disassembly and assembly of the positioning clamp 4, thereby facilitating the pressing of the positioning clamp 4 after the metal wire part 3 is wrapped around the guide post 1.

[0023] It should be noted that the aforementioned positioning half-hoop 41, limiting block 5, and pressure ring 7 are all made of insulating and heat-insulating materials, such as plastic materials.

[0024] Working principle: The operator winds the metal wire 3 around the variable diameter section 12, then presses the two positioning half-hoops 41 on the outside of the metal wire 3, so that the elastic positioning pad 42 contacts the metal wire 3, and tightens the fixing bolt 43, at which point the compression spring 6 is in a compressed state; when the conductor post 1 heats up severely, the conductor post 1 expands slightly due to the heat, and the metal wire 3 will move towards the side with the smaller diameter of the variable diameter section 12 due to this expansion; when the heat of the conductor post 1 decreases, the compression spring 6 can cause the positioning hoop 4 to move the metal wire 3 towards the side of the cylindrical section 11, thereby ensuring a stable fit between the metal wire 3 and the conductor post 1.

[0025] Second implementation method: like Figures 2-5 As shown, one end of the compression spring 6 is fixed to the limiting block 5, and the other end of the compression spring 6 is fixed to a pressure ring 7. The pressure ring 7 abuts against the positioning hoop 4. A limiting slide rod 8 is fixed to the end face of the pressure ring 7 away from the positioning hoop 4. The limiting slide rod 8 is coaxially arranged with the variable diameter section 12. A limiting slide groove 501 is provided on the limiting block 5 for the limiting slide rod 8 to slide into. A positioning post 9 is fixed to the end face of the pressure ring 7 away from the compression spring 6. A positioning hole 4101 for the positioning post 9 to be inserted is provided on the side end of the positioning half hoop 41.

[0026] The setting of the limiting slide bar 8 and the positioning post 9 can effectively prevent the axis of the positioning hoop 4 from deviating from the axis of the guide post 1, thereby ensuring the stable pressing effect of the elastic positioning pad 42 on the metal wire part 3.

[0027] It should be noted that the specific models and specifications of the electrical equipment involved in this solution need to be selected and determined based on the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, so they will not be described in detail here. The power supply and principles of the electrical equipment involved are clear to those skilled in the art, and will not be described in detail here.

[0028] The above description is merely a preferred embodiment of this utility model; it encompasses all the protection scope of this utility model. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be covered within the protection scope of this utility model.

Claims

1. A transformer anti-loosening terminal block, comprising a conductor post (1) and a porcelain bushing (2) sleeved on the outside of the conductor post (1), characterized in that: The conductor post (1) includes an integrally formed cylindrical section (11) and a variable diameter section (12). The diameter of the variable diameter section (12) gradually decreases toward the side away from the cylindrical section (11). A metal wire portion (3) is wound on the variable diameter section (12). A positioning hoop (4) is fitted on the outside of the metal wire part (3), and the positioning hoop (4) presses the metal wire part (3) onto the variable diameter section (12); A reset assembly is installed at the end of the variable diameter section (12) away from the cylindrical section (11). The reset assembly is connected to the positioning hoop (4), causing the positioning hoop (4) to move with the metal wire part (3) toward one side of the cylindrical section (11).

2. The transformer anti-loosening terminal according to claim 1, characterized in that: The reset assembly includes a limiting block (5) and a compression spring (6). The limiting block (5) is coaxially fixed to the end of the variable diameter section (12) away from the cylindrical section (11). The compression spring (6) is disposed between the positioning hoop (4) and the limiting block (5).

3. A transformer anti-loosening terminal according to claim 2, characterized in that: One end of the compression spring (6) is fixed to the limiting block (5), and the other end of the compression spring (6) is fixed with a pressure ring (7). The pressure ring (7) abuts against the positioning hoop (4). The end face of the pressure ring (7) away from the positioning hoop (4) is fixed with a limiting slide rod (8). The limiting slide rod (8) is coaxially arranged with the variable diameter section (12). The limiting block (5) is provided with a limiting groove (501) for the limiting slide rod (8) to slide into.

4. A transformer anti-loosening terminal according to claim 3, characterized in that: The positioning hoop (4) includes two positioning half hoops (41) and two elastic positioning pads (42). The two positioning half hoops (41) form a ring around the outside of the metal wire part (3), and the two positioning half hoops (41) are fixed together by fixing bolts (43). The two elastic positioning pads (42) are respectively fixed on the inner wall of the two positioning half hoops (41) and in contact with the metal wire part (3).

5. A transformer anti-loosening terminal according to claim 4, characterized in that: The end face of the pressure ring (7) away from the compression spring (6) is fixed with a positioning post (9), and the side end of the positioning half hoop (41) is provided with a positioning hole (4101) for the positioning post (9) to be inserted.

6. A transformer anti-loosening terminal according to claim 4, characterized in that: The positioning hoop (4), the limiting block (5), and the pressure ring (7) are all made of insulating and heat-insulating materials.

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