An interference-resistant current transformer

Abstract

The utility model provides a kind of current transformer of anti-interference, including current transformer body, the bottom of current transformer body is fixedly arranged with mounting seat, the bottom of mounting seat is fixedly arranged with mounting plate, wiring terminal is symmetrically arranged on the mounting seat;One side of the mounting seat is provided with elastic sleeve, two supporting rollers are symmetrically arranged below the elastic sleeve, one end of the supporting roller is fixedly connected with one side of the mounting seat, the supporting roller is in abutment with the bottom of the elastic sleeve, the top of the elastic sleeve is provided with the center position corresponding between two the supporting roller of pressure roller, the mounting seat is provided with the pressure mechanism of driving the pressure roller to move down or reset, the utility model can avoid that the external force received by wiring is directly transmitted to connection end, improve the connection stability between connection end and wiring terminal, avoid unnecessary interference.

Description

Technical Field

[0001] This utility model belongs to the field of power equipment technology, and specifically relates to an anti-interference current transformer. Background Technology

[0002] When a current transformer is in use, the force of external pulling or shaking is directly transmitted to the connection end, which can easily cause the connection end and the terminal to loosen. This will increase the contact resistance, and when the current passes through, it will generate local high temperature and discharge. Actual measurements show that when the bolt torque is insufficient, the contact resistance can rise to more than 5 times the normal value, causing arc discharge and generating high-frequency harmonics, polluting the secondary circuit signal and generating unnecessary interference.

[0003] Therefore, it is necessary to design an anti-interference current transformer to prevent the external forces on the wiring from being directly transmitted to the connection end, improve the connection stability between the connection end and the terminal block, and avoid unnecessary interference to solve the current technical problems. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, this utility model provides an anti-interference current transformer that avoids the external force on the wiring being directly transmitted to the connection end, improves the connection stability between the connection end and the wiring terminal, and avoids unnecessary interference.

[0005] The technical solution of this utility model is as follows: an anti-interference current transformer, including a current transformer body, a mounting base fixedly provided at the bottom of the current transformer body, a mounting plate fixedly provided at the bottom of the mounting base, and wiring terminals symmetrically provided on the mounting base; an elastic sleeve is provided on one side of the mounting base, and two rollers are symmetrically provided below the elastic sleeve, one end of the rollers is fixedly connected to one side of the mounting base, the rollers abut against the bottom of the elastic sleeve, a pressure roller corresponding to the center position between the two rollers is provided above the elastic sleeve, and a pressing mechanism is provided on the mounting base to drive the pressure roller to move down or up and reset.

[0006] Furthermore, the pressing mechanism has a bracket corresponding to the pressure roller, and a pressure frame is slidably arranged inside the bracket in the vertical direction. The pressure roller is fixedly arranged inside the pressure frame, and a screw threadedly connected to the top of the bracket is rotatably arranged on the top of the pressure frame.

[0007] Furthermore, the bracket has a "C" shaped structure, a vertical groove is provided on one side of the bracket, a sliding rod matching the groove is provided on one side of the bracket, and a limit plate is fixedly provided at the end of the sliding rod.

[0008] Furthermore, a handwheel is fixedly provided at the top end of the screw.

[0009] Furthermore, a lower support block is provided below the idler roller, and the lower support block is fixedly connected to one side of the mounting base. An outer support plate is fixedly provided on the lower support block at one end away from the mounting base, and the end of the idler roller away from the mounting base is fixedly connected to one side of the outer support plate.

[0010] Furthermore, the elastic sleeve has a sleeve body, one end of which has a fixing ring integrally formed with the sleeve body, and a support is fitted on the outer side of one end of the sleeve body. The fixing ring is bonded and fixed to one side of the support, and one end of the support is fixedly connected to the mounting base.

[0011] Furthermore, the inner convex ring, which is integrally formed with the sleeve body, is uniformly arranged along its radial direction inside the sleeve body.

[0012] Furthermore, the sleeve body is a cylindrical structure made of butyl rubber or polyurethane rubber.

[0013] The beneficial effects of this utility model are as follows: In this utility model, the current transformer wiring is inserted through the inside of the elastic bushing, and the wiring extends out of the elastic bushing and connects to the terminal block. The pressure roller is driven to move downward by the pressing mechanism. The pressure roller presses down on the elastic bushing, causing it to bend downward. It cooperates with the support roller to apply pressure on both sides of the elastic bushing, clamping the wiring inside the elastic bushing and increasing the friction between the wiring and the inside of the elastic bushing. When the wiring is subjected to external forces such as pulling or shaking, the force is prevented from being directly transmitted to the connection end, improving the connection stability between the connection end and the terminal block and avoiding unnecessary interference. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the anti-interference current transformer in this utility model.

[0015] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0016] Figure 3 This is a schematic diagram of the elastic sleeve in this utility model. Detailed Implementation

[0017] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are not intended to limit the present invention or its application or use in any way. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0018] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] like Figures 1 to 3 As shown, an anti-interference current transformer is disclosed, including a current transformer body 1. A mounting base 2 is fixedly mounted on the bottom of the current transformer body 1, and a mounting plate 21 is fixedly mounted on the bottom of the mounting base 2. Terminal blocks 3 are symmetrically arranged on the mounting base 2. An elastic sleeve 5 is provided on one side of the mounting base 2, and two rollers 6 are symmetrically arranged below the elastic sleeve 5. One end of each roller 6 is fixedly connected to one side of the mounting base 2, and the rollers 6 abut against the bottom of the elastic sleeve 5. A pressure roller 7, corresponding to the center position between the two rollers 6, is provided above the elastic sleeve 5. A mechanism on the mounting base 2 is provided to drive the pressure roller 7 to move downwards or upwards and reset. The pressing mechanism 8; In this embodiment, the current transformer wiring passes through the inside of the elastic sleeve 5, and after the wiring extends out of the elastic sleeve 5, it connects to the terminal 3. The pressing mechanism 8 drives the pressure roller 7 to move downward, and the pressure roller 7 presses down on the elastic sleeve 5 to make it bend downward. It cooperates with the support roller 6 to apply pressure on both sides of the elastic sleeve 5, clamping the wiring inside the elastic sleeve 5 while increasing the friction between it and the inside of the elastic sleeve 5. When the wiring is subjected to external forces such as pulling or shaking, the force is prevented from being directly transmitted to the connection end, improving the connection stability between the connection end and the terminal and avoiding unnecessary interference.

[0020] In some embodiments, as a specific implementation of the pressing mechanism 8, the pressing mechanism 8 has a bracket 82 corresponding to the pressure roller 7. A pressure frame 81 is slidably arranged in the vertical direction inside the bracket 82. The pressure frame 81 is in the shape of an inverted "U". The pressure roller 7 is fixedly arranged inside the pressure frame 81. A screw 83 is rotatably arranged on the top of the pressure frame 81 and threadedly connected to the top of the bracket 82. When the screw 83 is rotated, the thread structure between the screw 83 and the bracket 82 drives the screw 83 to move the pressure frame 81 and the pressure roller 7 downward or upward. When moving downward, the pressure roller 7 applies pressure to the middle part of the elastic sleeve 5, causing it to bend, and cooperates with the support roller 6 to clamp and fix the wiring inside the elastic sleeve 5.

[0021] In some embodiments, the bracket 82 has a "C" shaped structure. A groove 85 is provided on one side of the bracket 82 in the vertical direction. A sliding rod (not shown in the figure) that matches the groove 85 is provided on one side of the bracket 82. A limit plate 86 is fixedly provided at the end of the sliding rod. One side of the pressure frame 81 slides through the sliding rod and the groove 85 to ensure the stability of the movement of the pressure frame 81, thereby ensuring the stability of the movement of the pressure roller 7 during the pressing process.

[0022] In some embodiments, a handwheel 84 is fixedly provided at the top of the screw 83, and the protective protrusion on the outside of the handwheel 84 can increase the friction between it and the hand.

[0023] In some embodiments, a lower support block 61 is provided below the idler roller 6. The lower support block 61 is fixedly connected to one side of the mounting base 2. An outer support plate 62 is fixedly provided on the lower support block 61 at the end opposite to the mounting base 2. The end of the idler roller 6 at the end opposite to the mounting base 2 is fixedly connected to one side of the outer support plate 62. The lower support block 61 and the outer support plate 62 cooperate to provide support for the outer end of the idler roller 6, ensuring the stability of the idler roller 6 and providing stable support for the elastic sleeve 5 when pressed down.

[0024] In some embodiments, as a specific implementation of the fixed installation of the elastic sleeve 5 on the mounting base 2, the elastic sleeve 5 has a sleeve body 51, one end of the sleeve body 51 has a fixing ring 52 integrally formed therewith, a support 4 is fitted on the outer side of one end of the sleeve body 51, the fixing ring 52 is bonded and fixed to one side of the support 4, and one end of the support 4 is fixedly connected to the mounting base 2.

[0025] In some embodiments, an inner convex ring 53, which is integrally formed with the sleeve body 5, is uniformly arranged along its radial direction inside the sleeve body 5. The inner convex ring 53 increases the roughness of the internal contact surface of the sleeve body 5, thereby increasing the friction between the sleeve body 5 and the wiring.

[0026] In some embodiments, the sleeve body 51 is a cylindrical structure made of butyl rubber or polyurethane rubber; specifically, the sleeve body 51, the fixing ring 52, and the inner convex ring 53 are integrally formed from the same material.

[0027] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0028] The embodiments described above only illustrate some implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An anti-interference current transformer, characterized in that: The device includes a current transformer body, a mounting base is fixedly provided at the bottom of the current transformer body, a mounting plate is fixedly provided at the bottom of the mounting base, and wiring terminals are symmetrically arranged on the mounting base. An elastic sleeve is provided on one side of the mounting base, and two rollers are symmetrically arranged below the elastic sleeve. One end of the roller is fixedly connected to one side of the mounting base, and the roller abuts against the bottom of the elastic sleeve. A pressure roller corresponding to the center position between the two rollers is provided above the elastic sleeve. A pressing mechanism is provided on the mounting base to drive the pressure roller to move down or up and reset.

2. The anti-interference current transformer according to claim 1, characterized in that: The pressing mechanism has a bracket corresponding to the pressure roller. A pressure frame is slidably arranged inside the bracket in the vertical direction. The pressure roller is fixedly arranged inside the pressure frame. A screw threadedly connected to the top of the bracket is rotatably arranged on the top of the pressure frame.

3. The anti-interference current transformer according to claim 2, characterized in that: The bracket has a "C" shaped structure. A vertical groove is provided on one side of the bracket, and a sliding rod that matches the groove is provided on one side of the bracket. A limit plate is fixedly provided at the end of the sliding rod.

4. The anti-interference current transformer according to claim 2, characterized in that: A handwheel is fixedly installed at the top of the screw.

5. The anti-interference current transformer according to claim 1, characterized in that: A lower support block is provided below the idler roller, and the lower support block is fixedly connected to one side of the mounting base. An outer support plate is fixedly provided on the lower support block at one end away from the mounting base, and the end of the idler roller away from the mounting base is fixedly connected to one side of the outer support plate.

6. The anti-interference current transformer according to claim 1, characterized in that: The elastic sleeve has a sleeve body, one end of which has a fixing ring integrally formed with the sleeve body, and a support is fitted on the outer side of one end of the sleeve body. The fixing ring is bonded and fixed to one side of the support, and one end of the support is fixedly connected to the mounting base.

7. The anti-interference current transformer according to claim 6, characterized in that: The inner convex ring, which is integral with the casing body, is uniformly arranged along its radial direction inside the casing body.

8. The anti-interference current transformer according to claim 6, characterized in that: The sleeve body is a cylindrical structure made of butyl rubber or polyurethane rubber.

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