A kind of test device for preventing overvoltage of opening and closing

Abstract

The utility model relates to the field of opening and closing test device, disclose a kind of opening and closing prevent overvoltage's test device, including opening and closing telescopic device, push rod device, both mutually combined use play a role, when the stroke of opening and closing telescopic device exceeds opening and closing stroke, push gate post is in place and cannot continue to move, but opening and closing telescopic device needs to move forward, at this time, elastic member starts to compress, and support block whole moves towards the direction of cylinder fixing piece, complete the buffer in the process of opening and closing, prevent the situation that opening and closing telescopic device is stuck, even for the switch of small opening and closing stroke, also will not cause test device damage because switch opening and closing has been completely in place and continues to push.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker opening and closing test devices, specifically a test device for preventing overvoltage during circuit breaker opening and closing. Background Technology

[0002] Mechanical break-in is an essential testing step for molded case circuit breakers. In this type of test, a cylinder is used to operate the switch handle for opening and closing. However, since the opening and closing strokes vary in the production of switches, it is necessary to continuously fine-tune the overall stroke of the cylinder. Sometimes, if the stroke is too large, for switches with small opening and closing strokes, the switch may be fully in place but continue to move forward, which can cause the cylinder to jam. Currently, there is no suitable test device to buffer and prevent overvoltage. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a test device for preventing overvoltage during opening and closing of circuit breakers, so as to solve the above problems.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0005] A test device for preventing overvoltage during circuit breaker opening and closing includes a circuit breaker telescopic device and a push rod device, wherein the circuit breaker telescopic device and the push rod device are connected.

[0006] The push rod device includes a cylinder fixing plate, a support block, a bushing, a fastener, an elastic element, and a push-gate assembly. The cylinder fixing plate is connected to the telescopic end of the opening and closing telescopic device. One end of the elastic element is connected to the cylinder fixing plate, and the other end extends and is connected inside the support block. A gap is left between the corresponding surfaces of the support block and the cylinder fixing plate. The cylinder fixing plate has a movable groove. One end of the fastener is connected to the support block, and the other end passes through the bushing and is movably located in the movable groove. The push-gate assembly is connected to the support block. When the stroke of the opening and closing telescopic device exceeds the opening and closing stroke, the push-gate column cannot continue to move after it is in place, but the opening and closing telescopic device needs to move forward. At this time, the elastic element begins to compress, and the support block moves as a whole towards the cylinder fixing element, completing the buffering in the opening and closing process and preventing the opening and closing telescopic device from jamming. Even for switches with small opening and closing strokes, the test device will not be damaged because the switch has been fully opened or closed and continues to advance.

[0007] Preferably, the elastic element is a spring.

[0008] Preferably, the opening and closing telescopic device is a cylinder.

[0009] Preferably, the gate pushing assembly includes a gate pushing column and a gate pushing bracket, the gate pushing column being connected to the end of the gate pushing bracket, and the gate pushing bracket being connected to a support block.

[0010] Preferably, the fastener is a bolt.

[0011] Compared with the prior art, this utility model discloses a test device for preventing overvoltage during opening and closing, including an opening and closing telescopic device and a push rod device. The two work together to play a role. When the stroke of the opening and closing telescopic device exceeds the opening and closing stroke, the push rod cannot continue to move after it is in place. However, the opening and closing telescopic device needs to move forward. At this time, the elastic element begins to compress, and the support block moves as a whole towards the cylinder fixing part, completing the buffering in the opening and closing process and preventing the opening and closing telescopic device from getting stuck. Even for switches with small opening and closing strokes, the test device will not be damaged because the switch has been fully opened or closed and continues to move forward. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the test device for preventing overvoltage during the opening and closing of the circuit breaker according to this utility model;

[0013] Figure 2 This is an exploded structural diagram of the test device for preventing overvoltage during the opening and closing of the circuit breaker according to this utility model;

[0014] Figure 3 This is an exploded view of the push rod device of this utility model;

[0015] Figure 4 This is a partial cross-sectional schematic diagram of the push rod device of this utility model. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] A test device for preventing overvoltage during circuit breaker opening and closing includes a circuit breaker telescopic device 1 and a push rod device 2. The circuit breaker telescopic device 1 is connected to the push rod device 2. The push rod device 2 includes a cylinder fixing plate 21, a support block 22, a bushing 23, a fastener 24, an elastic element 25, and a push assembly 26. The cylinder fixing plate 21 is connected to the telescopic end of the circuit breaker telescopic device 1. One end of the elastic element 25 is connected to the cylinder fixing plate 21, and the other end extends and is connected to the inside of the support block 22. The support block 22 and the cylinder fixing plate 21 are correspondingly arranged in a table. A gap is left between the surfaces. The cylinder fixing plate 21 is provided with a movable groove. One end of the fastener 24 is connected to the support block 22, and the other end is movably located in the movable groove through the bushing 23. The push gate assembly 26 is connected to the support block 22. The elastic element 25 is a spring. The opening and closing telescopic device 1 is a cylinder. The push gate assembly 26 includes a push gate column 261 and a push gate bracket 262. The push gate column 261 is connected to the end of the push gate bracket 262. The push gate bracket 262 is connected to the support block 22. The fastener 24 is a bolt.

[0018] The force value of the elastic element 25 selected in this scheme should be 110% of the upper limit of the opening and closing force. Under normal opening and closing conditions, when the stroke of the opening and closing telescopic device 1 does not exceed the opening and closing stroke, the thrust of the elastic element 25 on the whole consisting of the pusher assembly 26 and the support block 22 is sufficient to ensure the normal opening and closing of the switch. When the stroke of the opening and closing telescopic device 1 exceeds the opening and closing stroke, the pusher column 261 cannot continue to move after it is in place, but the opening and closing telescopic device 1 needs to move forward. At this time, the elastic element 25 begins to compress, and the support block 22 moves towards the cylinder fixing part. The gap distance between the corresponding surfaces of the support block 22 and the cylinder fixing plate 21 is sufficient to meet the displacement distance of the support block 22 after the elastic element 25 is compressed, thus completing the buffering work in the opening and closing process.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0021] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A test device for preventing overvoltage during closing and opening of a switch, characterized in that: It includes a gate opening and closing telescopic device (1) and a push rod device (2), wherein the gate opening and closing telescopic device (1) is connected to the push rod device (2). The push rod device (2) includes a cylinder fixing plate (21), a support block (22), a bushing (23), a fastener (24), an elastic element (25), and a push gate assembly (26). The cylinder fixing plate (21) is connected to the telescopic end of the opening and closing telescopic device (1). One end of the elastic element (25) is connected to the cylinder fixing plate (21), and the other end extends and is connected to the inside of the support block (22). There is a gap between the corresponding surfaces of the support block (22) and the cylinder fixing plate (21). The cylinder fixing plate (21) is provided with a movable groove. One end of the fastener (24) is connected to the support block (22), and the other end is movably located in the movable groove through the bushing (23). The push gate assembly (26) is connected to the support block (22).

2. The test device for preventing overvoltage during closing and opening of a switch according to claim 1, characterized in that: The elastic element (25) is a spring.

3. The test device for preventing overvoltage during closing and opening of a switch according to claim 1, characterized in that: The opening and closing telescopic device (1) is a cylinder.

4. The test device for preventing overvoltage during closing and opening of a switch according to claim 1, characterized in that: The gate push assembly (26) includes a gate push column (261) and a gate push bracket (262). The gate push column (261) is connected to the end of the gate push bracket (262), and the gate push bracket (262) is connected to the support block (22).

5. The test device for preventing overvoltage during closing and opening of a switch according to claim 1, characterized in that: The fastener (24) is a bolt.

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