Partial-discharge-free test transformer

Abstract

The utility model discloses a non-partial-discharge test transformer, and particularly relates to the technical field of non-partial-discharge test transformers, which comprises a mechanical automatic pressing structure, after a U-shaped wiring terminal is inserted on a binding post, an elastic piece drives the binding post to move downwards, and a pressing seat fixes the wiring terminal, and for a circular ring wiring terminal, an elastic piece drives the binding post to move downwards. The circular ring wiring terminal is directly connected to the binding post in a sleeving mode and moves downwards, due to the structure of the inclined face of the pressing base, the pressing base extrudes the telescopic spring to enter the assembling cavity, the circular ring wiring terminal enters the bottom of the pressing base, then the pressing base pops up and is fixed, fixing and dismounting of the wiring terminal can be completed without using tools, and a mechanical automatic pressing structure is adopted. Good contact between the wiring terminal and the binding post can be ensured, in the disassembly process, the pull wire is wound by rotating the twisting wheel, the pressing seat enters the assembly cavity, disassembly can be completed, the assembly or disassembly operation is relatively simple and convenient, and damage or misoperation caused by the assembly or disassembly can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of non-partial discharge test transformers, in particular to a non-partial discharge test transformer. Background Art

[0002] A non-PD test transformer is a test transformer with no partial discharge (PD) output. However, the current PD output of a non-PD test transformer is minimal and does not affect the PD output of electrical equipment using a PD instrument. A gas-filled non-PD test transformer is a relatively reliable high-voltage non-PD device. There are two types of non-PD test transformers: the gas-filled type and the epoxy barrel oil-immersed type. Creating a non-PD test transformer with PD output is more difficult.

[0003] During the test of a transformer without partial discharge test, the connecting wires on the terminal blocks need to be frequently removed and installed. Most existing terminal blocks are connected by nuts and bolts, which results in relatively low efficiency in the process of removing the connecting wires.

[0004] In the prior art, for example, in Chinese patent publication number CN215896139U, an SF6 non-partial discharge test transformer is disclosed, comprising a base, wherein the top outer wall of the base is fixedly connected to a shell, and the top outer wall of the shell is fixedly connected to a top plate, the top outer wall of the top plate is fixedly connected to an insulator, and the top outer wall of the insulator is fixedly connected to a terminal block mechanism, the terminal block mechanism comprising a terminal block, the top outer wall of the terminal block is provided with circular openings distributed at equal distances, and the inner walls of the three circular openings are slidably connected to a terminal post mechanism, the terminal post mechanism comprises an insulating seat and a mounting plate, and the top outer wall of the insulating seat is fixedly connected to a conductive post, the bottom outer wall of the mounting plate is provided with a circular groove, and both sides of the inner wall of the circular groove are provided with circular openings. The utility model provides a terminal block mechanism on the top plate, and the terminal post mechanism on the terminal block mechanism facilitates the quick installation and connection of the connecting wire ends, thereby avoiding the low efficiency and easy damage of the traditional nut connection method.

[0005] Although the above device speeds up the work of the terminal to a certain extent, in actual use, when wiring the annular terminal, it is still necessary to remove the clamping ring and install it after completing the sleeve connection. The process is relatively cumbersome. Therefore, we propose a partial discharge-free test transformer to solve the above problem. Utility Model Content

[0006] The utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0007] To this end, the technical solution adopted in this utility model is:

[0008] A transformer for testing partial discharge free includes a terminal block, wherein a plurality of terminals are installed inside the terminal block, and the plurality of terminals are evenly distributed along the length of the terminal block. An elastic member is provided at the bottom of the terminal block, and an end of the elastic member away from the terminal block is fixedly connected to the bottom of the terminal block inner cavity. A control component for stabilizing the terminal is provided at the top of the terminal block, and the control component includes an assembly chamber, which is opened at the top of the terminal block, and a plurality of guide grooves are opened at the bottom of the inner cavity of the assembly chamber. A fixed cylinder is fixedly connected to one end of the inner cavity of the guide groove near the axis of the terminal block, and a telescopic spring is built into the fixed cylinder. A moving roller is sleeved on one end of the telescopic spring away from the fixed cylinder. The moving roller is placed in the guide groove, and a pressure seat for fixing the terminal is fixedly connected to one end of the moving roller outside the terminal block. A winding roller is built into the assembly chamber, and a number of pull wires matching the number of the moving rollers are sleeved on the surface of the winding roller. One end of the pull wire is fixedly connected to the winding roller, and the other end of the pull wire is fixedly connected to a limit plate, and the limit plate is sleeved on the surface of the moving roller. The limit plate is fixedly connected to the moving roller.

[0009] Preferably, the plurality of guide grooves are evenly distributed around the axis of the assembly chamber, one end of the guide groove is close to the axis of the terminal post, and the other end of the guide groove passes through the terminal post and extends to the outside.

[0010] Preferably, the telescopic spring is placed in the guide groove, one end of the telescopic spring is fixedly connected to the bottom of the inner cavity of the fixed cylinder, and the other end of the telescopic spring is fixedly connected to the moving roller.

[0011] Preferably, the moving roller is slidably connected to the wall of the guide groove, and one end of the moving roller away from the telescopic spring extends from the guide groove to the outside of the terminal.

[0012] Preferably, the top of the pressure seat is provided with an inclined surface for facilitating the entry of the circular terminal, and the bottom of the pressure seat is a vertical surface for pressing the terminal.

[0013] Preferably, a rotating bearing is sleeved on the bottom of the winding roller, the inner ring wall of the rotating bearing is fixedly connected to the winding roller, and the outer ring wall of the rotating bearing is fixedly connected to the bottom of the inner cavity of the assembly chamber.

[0014] Preferably, the winding roller coincides with the axis of the terminal.

[0015] Preferably, a twist wheel is fixedly connected to the top of the winding roller, and the bottom of the twist wheel is in contact with the terminal and is rotatably connected thereto.

[0016] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0017] The terminal fixing method of the non-partial discharge test transformer in the utility model adopts a mechanical automatic pressing structure. For the U-shaped terminal, after it is plugged into the terminal post, the elastic member drives the terminal post to move downward, and the pressure seat fixes the terminal. For the ring terminal, the ring terminal is directly put on the terminal post and moved up and down. Due to the structure of the inclined surface of the pressure seat, the pressure seat squeezes the telescopic spring into the assembly chamber, and the ring terminal is able to enter the bottom of the pressure seat, and then the pressure seat pops out and is fixed. The terminal can be fixed and removed without using tools, which improves work efficiency. The mechanical automatic clamping structure is adopted to ensure good contact between the terminal and the terminal post, reduce contact resistance, and reduce heat generation. During the disassembly process, the wire is reeled in by rotating the twist wheel to make the pressure seat enter the assembly chamber to complete the disassembly. The design of the elastic part, pressure seat and guide groove ensures good contact and fixation between the terminal and the terminal post, and can remain stable even under long-term use and high load conditions. The winding roller and twist wheel mechanism make the operation relatively simple when assembly or disassembly is required, which can reduce damage or misoperation caused by it. The design is suitable for applications that require high reliability and long-term stable operation, and is more convenient for daily maintenance and inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the utility model as a whole.

[0019] Figure 2 This is a schematic diagram of the internal structure of the terminal of the utility model.

[0020] Figure 3 This is a schematic diagram of the assembly structure of the winding roller and the terminal of the utility model.

[0021] Figure 4 For this utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0022] Figure 5 This is a schematic diagram of the control component structure of the utility model.

[0023] In the figure: 1. Terminal block; 2. Terminal post; 201. Elastic member; 3. Control assembly; 301. Assembly chamber; 302. Guide groove; 303. Fixed cylinder; 304. Telescopic spring; 305. Moving roller; 306. Limiting plate; 307. Pressure seat; 308. Inclined surface; 309. Vertical surface; 310. Winding roller; 311. Rotating bearing; 312. Pull wire; 313. Twist wheel. DETAILED DESCRIPTION

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

[0025] Example: Figure 1-Figure 5 As shown, the utility model provides a partial discharge-free test transformer, including a terminal block 1, wherein a plurality of terminal posts 2 are installed inside the terminal block 1, and the plurality of terminal posts 2 are evenly distributed along the length direction of the terminal block 1. An elastic member 201 is provided at the bottom of the terminal post 2, and one end of the elastic member 201 away from the terminal post 2 is fixedly connected to the bottom of the inner cavity of the terminal block 1. A control component 3 for stabilizing the terminal is provided on the top of the terminal post 2. After the terminal is fixed to the terminal post, the pressure seat 307 can be driven by the elastic member 201 to fix the terminal to the terminal block 1.

[0026] Furthermore, an assembly chamber 301 is provided in the control component 3, and the assembly chamber 301 is opened at the top of the terminal 2, and a plurality of guide grooves 302 are opened at the bottom of the inner cavity of the assembly chamber 301, and the plurality of guide grooves 302 are evenly distributed around the axis of the assembly chamber 301, and one end of the guide groove 302 is close to the axis of the terminal 2, and the other end of the guide groove 302 passes through the terminal 2 and extends to the outside, and the end of the inner cavity of the guide groove 302 close to the axis of the terminal 2 is fixedly connected to a fixed cylinder 303, and a telescopic spring 304 is built in the fixed cylinder 303, and a moving roller 305 is sleeved on the end of the telescopic spring 304 away from the fixed cylinder 303, and the telescopic spring 304 is placed in the guide groove 302, and one end of the telescopic spring 304 is fixedly connected to the bottom of the inner cavity of the fixed cylinder 303, and the other end of the telescopic spring 304 is fixedly connected to the moving roller 305, and the moving roller 305 is placed in the guide groove 302. The guide groove 302 is slidably connected to the groove wall, and the end of the moving roller 305 away from the telescopic spring 304 extends from the guide groove 302 to the outside of the terminal 2. The moving roller 305 is fixedly connected to a pressure seat 307 for fixing the terminal at one end outside the terminal 2. The top of the pressure seat 307 is provided with an inclined surface 308 for facilitating the entry of the circular ring terminal. The bottom of the pressure seat 307 is a vertical surface 309 for pressing the terminal. When the U-shaped terminal is fixed to the terminal 2, it is plugged into the terminal 2, and the elastic member 201 drives the terminal 2 to move downward, and the pressure seat 307 fixes the terminal. When it is a circular ring terminal, the circular ring terminal is directly sleeved on the terminal 2 and moves up and down. Due to the structure of the inclined surface 308 of the pressure seat 307, the pressure seat 307 squeezes the telescopic spring into the assembly chamber 301, and the circular ring terminal is able to enter the bottom of the pressure seat 307, and the pressure seat 307 pops out and is fixed.

[0027] Furthermore, a winding roller 310 is built into the assembly chamber 301, and a rotating bearing 311 is sleeved on the bottom of the winding roller 310. The inner ring wall of the rotating bearing 311 is fixedly connected to the winding roller 310, and the outer ring wall of the rotating bearing 311 is fixedly connected to the bottom of the inner cavity of the assembly chamber 301. The winding roller 310 coincides with the axis of the terminal 2. The surface of the winding roller 310 is sleeved with a number of pull wires 312 that match the number of the moving roller 305. One end of the pull wire 312 is fixedly connected to the winding roller 310, and the other end of the pull wire 312 is fixedly connected to the limit plate 306. The limit plate 306 is fixedly connected to the limit plate 306. 06 is sleeved on the surface of the moving roller 305, the limit plate 306 is fixedly connected to the moving roller 305, and a twisting wheel 313 is fixedly connected to the top of the winding roller 310. The bottom of the twisting wheel 313 is in contact with the terminal 2 and is rotatably connected thereto. When disassembly is required, the twisting wheel 313 is rotated to drive the winding roller 310 to reel in the multiple pressure seats 307, so that the pressure seats 307 enter the assembly chamber 301, and the annular terminal can be taken out from the terminal 2, making the operation relatively simple when assembly or disassembly is required, and reducing the damage or misoperation caused thereby.

[0028] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A partial discharge-free test transformer, characterized in that: The invention comprises a terminal block (1), wherein a plurality of terminal posts (2) are installed inside the terminal block (1), wherein the plurality of terminal posts (2) are evenly distributed along the length direction of the terminal block (1), an elastic member (201) is provided at the bottom of the terminal post (2), and an end of the elastic member (201) away from the terminal post (2) is fixedly connected to the bottom of the inner cavity of the terminal block (1), and a control component (3) for stabilizing the terminal is provided at the top of the terminal post (2), wherein the control component (3) comprises an assembly chamber (301), wherein the assembly chamber (301) is provided at the top of the terminal post (2), and a plurality of guide grooves (302) are provided at the bottom of the inner cavity of the assembly chamber (301), and a fixing cylinder (303) is fixedly connected to one end of the inner cavity of the guide groove (302) close to the axis of the terminal post (2), and the fixing cylinder (303) has a built-in A telescopic spring (304), wherein one end of the telescopic spring (304) away from the fixed cylinder (303) is sleeved with a moving roller (305), wherein the moving roller (305) is placed in a guide groove (302), wherein one end of the moving roller (305) outside the terminal (2) is fixedly connected to a pressure seat (307) for fixing the terminal, wherein a winding roller (310) is built in the assembly chamber (301), wherein the surface of the winding roller (310) is sleeved with a number of pull wires (312) matching the number of the moving roller (305), wherein one end of the pull wire (312) is fixedly connected to the winding roller (310), and the other end of the pull wire (312) is fixedly connected to a limiting plate (306), wherein the limiting plate (306) is sleeved on the surface of the moving roller (305), and wherein the limiting plate (306) is fixedly connected to the moving roller (305).

2. A partial discharge-free test transformer according to claim 1, characterized in that: The plurality of guide grooves (302) are evenly distributed around the axis of the assembly chamber (301), one end of the guide groove (302) is close to the axis of the terminal post (2), and the other end of the guide groove (302) penetrates the terminal post (2) and extends to the outside.

3. A partial discharge-free test transformer according to claim 1, characterized in that: The telescopic spring (304) is placed in the guide groove (302), one end of the telescopic spring (304) is fixedly connected to the bottom of the inner cavity of the fixed cylinder (303), and the other end of the telescopic spring (304) is fixedly connected to the moving roller (305).

4. A partial discharge-free test transformer according to claim 1, characterized in that: The moving roller (305) is slidably connected to the groove wall of the guide groove (302), and one end of the moving roller (305) away from the telescopic spring (304) extends from the guide groove (302) to the outside of the terminal (2).

5. The non-partial discharge test transformer according to claim 1, characterized in that: The top of the pressing seat (307) is provided with an inclined surface (308) for facilitating the entry of the circular connecting terminal, and the bottom of the pressing seat (307) is a vertical surface (309) for pressing the connecting terminal.

6. A partial discharge-free test transformer according to claim 1, characterized in that: The bottom of the winding roller (310) is sleeved with a rotating bearing (311), the inner ring wall of the rotating bearing (311) is fixedly connected to the winding roller (310), and the outer ring wall of the rotating bearing (311) is fixedly connected to the bottom of the inner cavity of the assembly chamber (301).

7. The non-partial discharge test transformer according to claim 1, characterized in that: The winding roller (310) coincides with the axis of the terminal post (2).

8. The non-partial discharge test transformer according to claim 1, characterized in that: The top of the winding roller (310) is fixedly connected to a twisting wheel (313), and the bottom of the twisting wheel (313) is in contact with the terminal (2) and is rotationally connected thereto.

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