Secondary pressure connection device for low voltage current transformer

Abstract

The application relates to the technical field of low-voltage current transformers, and discloses a low-voltage current transformer secondary pressure connection device, which comprises a low-voltage current transformer body and fixing sheets, the fixing sheets are welded on the two sides of the low-voltage current transformer body, the low-voltage current transformer body is provided with a pressure connection mechanism on the front face, and the two sides of the low-voltage current transformer body are provided with fixing mechanisms; the pressure connection mechanism comprises a connecting seat, a supporting rod, a pressure connection terminal one, a pressure connection terminal two, a pressing block, a spring, a supporting sheet, a convex rod and a sliding block, and the pressure connection terminal one and the pressure connection terminal two are sleeved outside the supporting rod. The low-voltage current transformer secondary pressure connection device is characterized in that when the pressure connection terminal one and the pressure connection terminal two are moved downward, the supporting sheet is pushed downward through the convex rod, the supporting sheet moving downward drives the sliding block to slide downward, the sliding block displays the moving-down position, the pressure connection terminal one and the pressure connection terminal two are not prone to forming a virtual connection with the connecting seat and the supporting rod, and the low-voltage current transformer secondary pressure connection is more stable.

Description

Technical Field

[0001] This application relates to the field of low-voltage current transformer technology, specifically to a secondary crimping device for low-voltage current transformers. Background Technology

[0002] A low-voltage current transformer is a measuring device that converts high-value alternating current into a standard low-value current. It is mainly used in AC circuits below 0.66kV, electronic equipment, instruments, and power protection devices. Its primary current ranges from 5A to 5000A, and its secondary output is a standard 5A current. Accuracy classes include 0.2%, 0.5%, and 1%. Secondary crimping of a low-voltage current transformer typically refers to the crimping process of the secondary side terminals, which involves fixing the wires of the measuring instrument or protection device to the transformer terminals using tools such as crimping pliers.

[0003] The crimping device of a low-voltage current transformer mainly consists of crimping terminals and a connector. The wires are connected to the crimping terminals, and the crimping terminals are connected to the low-voltage current transformer through the connector. In the process of connecting the existing crimping terminals and the connector, it is easy to form a loose connection, which can cause a short circuit in the low-voltage current transformer.

[0004] Therefore, there is an urgent need for a secondary crimping device for low-voltage current transformers to solve the problem of loose connections that are easily formed during secondary crimping of low-voltage current transformers. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a secondary crimping device for low-voltage current transformers, which has the advantage of improving the connection stability of low-voltage current transformers and solves the problem of easy formation of incomplete connections in the secondary crimping of low-voltage current transformers.

[0006] To achieve the above objectives, this application provides the following technical solution: a secondary crimping device for a low-voltage current transformer, comprising a low-voltage current transformer body and a fixing plate, wherein the fixing plate is welded to both sides of the low-voltage current transformer body, a crimping mechanism is provided on the front side of the low-voltage current transformer body, and a fixing mechanism is provided on both sides of the low-voltage current transformer body.

[0007] The crimping mechanism includes a connecting seat, a support rod, a first crimping terminal, a second crimping terminal, a pressure block, a spring, a support plate, a protruding rod, and a slider. The support rod is welded to the top of the connecting seat. The first and second crimping terminals are sleeved on the outside of the support rod. The pressure block is threaded to the top of the support rod. The spring and the support plate are installed in the slot inside the connecting seat. The protruding rod is welded to the top of the support plate, and the slider is welded to the outer surface of the support plate.

[0008] When crimp terminals one and two move downwards, the support plate is pushed downwards by the protruding rod. The downward movement of the support plate causes the slider to slide downwards, and the slider indicates the downward position. This makes it less likely for crimp terminals one and two to form a loose connection with the connecting seat and the support rod, making the secondary crimping of the low-voltage current transformer more stable.

[0009] Preferably, the support plate is located above the spring.

[0010] Preferably, the slider is slidably connected to the square groove on the outside of the connecting seat.

[0011] Preferably, the top of the crimp terminal one and the crimp terminal two are provided with circular slots for connecting wires.

[0012] Preferably, the fixing mechanism includes a support plate, a socket, and a fastening bolt. The support plate is welded to both sides of the low-voltage current transformer body, the socket is opened on the outside of the support plate, and the fastening bolt is threaded to the inside of the support plate.

[0013] Preferably, the support plate is a U-shaped plate.

[0014] In summary, this application includes at least one of the following beneficial effects:

[0015] 1. In this low-voltage current transformer secondary crimping device, when the low-voltage current transformer is connected to crimping terminal one and crimping terminal two, the pressure block rotates and moves downward to press crimping terminal one and crimping terminal two onto the connecting seat. When crimping terminal one and crimping terminal two move downward, the support plate is pushed downward through the protruding rod. The downward movement of the support plate causes the slider to slide downward. The slider indicates the downward position, making it less likely for crimping terminal one and crimping terminal two to form a loose connection with the connecting seat and support rod, preventing short circuit of the low-voltage current transformer body, and making the secondary crimping of the low-voltage current transformer more stable.

[0016] 2. In this low-voltage current transformer secondary crimping device, when the wire passes through the socket on the outside of the support plate, the operator rotates the fastening bolt. When the fastening bolt moves inward, it presses the wire tightly, making the wire less prone to shaking and ensuring stable crimping. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the low-voltage current transformer in this application;

[0018] Figure 2 This is a bottom view of the low-voltage current transformer structure of this application;

[0019] Figure 3 This is a schematic diagram of the overall structure of the crimping mechanism in this application;

[0020] Figure 4 This is a schematic diagram of the connection structure of the spring, support plate, and protruding rod in this application;

[0021] Figure 5 This is a schematic diagram of the overall structure of the fixing mechanism in this application;

[0022] Figure 6 This is a schematic diagram of the overall structure of the pressing block in this application.

[0023] The components are as follows: 1. Low-voltage current transformer body; 111. Connecting seat; 112. Support rod; 113. Crimp terminal one; 114. Crimp terminal two; 115. Pressing block; 116. Spring; 117. Support plate; 118. Protruding rod; 119. Sliding block; 2. Fixing plate; 211. Support plate; 212. Insertion hole; 213. Fastening bolt. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] Please see Figure 1-6 The low-voltage current transformer secondary crimping device includes a low-voltage current transformer body 1 and a fixing plate 2. The fixing plate 2 is welded to both sides of the low-voltage current transformer body 1 and fixed to a predetermined position by bolts, so that the low-voltage current transformer body 1 can be stably installed. A crimping mechanism is provided on the front of the low-voltage current transformer body 1 and a fixing mechanism is provided on both sides of the low-voltage current transformer body 1.

[0026] Specifically, the crimping mechanism includes a connecting seat 111, a support rod 112, a first crimping terminal 113, a second crimping terminal 114, a pressure block 115, a spring 116, a support plate 117, a protruding rod 118, and a slider 119. The support rod 112 is welded to the top of the connecting seat 111. The first crimping terminal 113 and the second crimping terminal 114 are sleeved on the outside of the support rod 112. The top of the first crimping terminal 113 and the second crimping terminal 114 are provided with circular slots for connecting wires. The pressure block 115 is threaded to the top of the support rod 112. The spring 116 and the support plate 117 are installed in the slots inside the connecting seat 111. The protruding rod 118 is welded to the top of the support plate 117. The support plate 117 is located above the spring 116. The slider 119 is welded to the outer surface of the support plate 117. The slider 119 is slidably connected to the square slot on the outside of the connecting seat 111.

[0027] Through the above technical solution, when the low-voltage current transformer is connected to the crimp terminal 113 and the crimp terminal 214, the crimp terminal 113 and the crimp terminal 214 are sleeved on the support rod 112. The pressure block 115 is rotated and moves down to press the crimp terminal 113 and the crimp terminal 214 onto the connecting seat 111. This makes it less likely for the crimp terminal 113 and the crimp terminal 214 to form a loose connection with the connecting seat 111 and the support rod 112, preventing the low-voltage current transformer body 1 from short-circuiting and making the secondary crimping of the low-voltage current transformer more stable.

[0028] When crimp terminals 113 and 114 move downward, they push the support plate 117 downward through the protruding rod 118. The downward movement of the support plate 117 causes the slider 119 to slide downward. The slider 119 indicates the downward position, making it less likely for crimp terminals 113 and 114 to form a loose connection with the connecting seat 111 and the support rod 112. The crimp terminals 113 and 114 are connected to the wire through the circular groove.

[0029] Specifically, the fixing mechanism includes a support plate 211, a socket 212, and a fastening bolt 213. The support plate 211 is welded to both sides of the low-voltage current transformer body 1. The socket 212 is opened on the outside of the support plate 211. The fastening bolt 213 is threaded to the inside of the support plate 211. The support plate 211 is a U-shaped plate.

[0030] With the above technical solution, when the wire passes through the socket 212 on the outside of the support plate 211, the worker rotates the fastening bolt 213. When the fastening bolt 213 moves inward, it presses the wire tightly, making the wire less prone to shaking and allowing the wire to be stably crimped.

[0031] During use, when crimp terminals 113 and 114 move downward, the support plate 117 is pushed downward by the protruding rod 118. The downward movement of the support plate 117 causes the slider 119 to slide downward. The slider 119 indicates the downward position, making it less likely for crimp terminals 113 and 114 to form a loose connection with the connecting seat 111 and the support rod 112, thus making the secondary crimping of the low-voltage current transformer more stable.

[0032] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-voltage current transformer secondary pressure connection device, comprising a low-voltage current transformer body (1) and a fixing sheet (2), characterized in that: The fixing plate (2) is welded to both sides of the low-voltage current transformer body (1). The front of the low-voltage current transformer body (1) is provided with a pressing mechanism, and the two sides of the low-voltage current transformer body (1) are provided with fixing mechanisms. The crimping mechanism includes a connecting seat (111), a support rod (112), a crimping terminal one (113), a crimping terminal two (114), a pressure block (115), a spring (116), a support plate (117), a protruding rod (118), and a slider (119). The support rod (112) is welded to the top of the connecting seat (111). The crimping terminal one (113) and the crimping terminal two (114) are sleeved on the outside of the support rod (112). The pressure block (115) is threaded to the top of the support rod (112). The spring (116) and the support plate (117) are installed in the slot inside the connecting seat (111). The protruding rod (118) is welded to the top of the support plate (117). The slider (119) is welded to the outer surface of the support plate (117).

2. The low voltage current transformer secondary pressure connection device of claim 1, wherein: The support plate (117) is located above the spring (116).

3. The low-voltage current transformer secondary crimping device according to claim 1, characterized in that: The slider (119) is slidably connected to the square groove on the outside of the connecting seat (111).

4. The low-voltage current transformer secondary crimping device according to claim 1, characterized in that: The crimping terminal one (113) and crimping terminal two (114) have circular slots on their tops for connecting wires.

5. The low-voltage current transformer secondary crimping device according to claim 1, characterized in that: The fixing mechanism includes a support plate (211), a socket (212) and a fastening bolt (213). The support plate (211) is welded to both sides of the low-voltage current transformer body (1). The socket (212) is opened on the outside of the support plate (211). The fastening bolt (213) is threaded to the inside of the support plate (211).

6. The low-voltage current transformer secondary crimping device according to claim 5, characterized in that: The support plate (211) is a U-shaped plate.

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