Primary and secondary fusion high-voltage vacuum circuit breaker

Abstract

The utility model relates to a primary and secondary fusion high-voltage vacuum circuit breaker which comprises a circuit breaker body, a connector arranged at the top end of a current transformer of the circuit breaker body, a wiring terminal arranged on one side of the connector and a protective cover installed on the connector in a matched mode and arranged on the outer side of the wiring terminal in a covering mode. The protective cover comprises a shell, a wire inlet arranged at one end of the shell and a connecting part arranged at the other end of the shell. According to the utility model, the protective cover adopts an integrated closed design, when the protective cover is used, a cable penetrates through the wire inlet, and after the cable and the wiring terminal are installed, the connecting part and the top end of the current transformer are installed together in a matched manner, so that the connection between the protective cover and the vacuum circuit breaker can be realized without an outdoor installation fixing device, and the installation is simpler and more convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of electric power hardware facilities, concretely relates to a primary and secondary fusion high voltage vacuum circuit breaker. BACKGROUND

[0002] The primary and secondary fusion high voltage vacuum circuit breaker is mainly used for breaking and closing load current, overload current and short circuit current of a power system, and is suitable for protection and control in a power distribution system of a substation and an industrial and mining enterprise, and is particularly suitable for frequently operated places and urban network automatic power distribution networks.

[0003] A wiring terminal is arranged at the current transformer side end of the primary and secondary fusion high voltage vacuum circuit breaker, and the wiring terminal is exposed to the environment for a long time during daily use, dirt is easily accumulated, safety is not high, and the circuit breaker is easily damaged. The utility model with publication number CN221304526U discloses a primary and secondary fusion high voltage vacuum circuit breaker, which forms protection by installing an insulation kit at the wiring terminal to isolate the wiring terminal from the external environment. However, the insulation kit of the technical scheme is designed to be openable and closable, and the insulation kit needs to be closed and fixed by using a fixing buckle during installation, so that the installation is not simple and convenient. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem of providing a primary and secondary fusion high voltage vacuum circuit breaker which is simple to install and easy to use.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A primary and secondary fusion high voltage vacuum circuit breaker comprises a circuit breaker body, a connector arranged at the top end of a current transformer of the circuit breaker body, a wiring terminal arranged at one side of the connector, and a protective cover cooperatively installed on the connector and covering the outside of the wiring terminal; the protective cover comprises a shell, a wire inlet arranged at one end of the shell, and a connecting part arranged at the other end of the shell; the shell comprises a first cavity, a second cavity and a third cavity which are connected in sequence and have increasing inner diameters; a first rubber sleeve is arranged inside the first cavity and is in a hollow state to serve as the wire inlet; a third rubber sleeve is arranged in the third cavity; and the connecting part is arranged at the outer side end of the third rubber sleeve.

[0007] Further, the connecting part comprises a connecting disc in the shape of a ring, a connecting sleeve vertically arranged on the outer edge of the connecting disc, and a clamping ring arranged on the inner wall of the connecting sleeve; the inner edge of the connecting disc is fixedly connected with the outer side end of the third rubber sleeve; a clamping part is arranged at the end of the connector; a ring groove is arranged between the clamping part and the connector; the clamping ring is matched with the ring groove; and the clamping part is cooperatively installed at the position between the connecting disc and the clamping ring.

[0008] Further, two sealing rings are arranged on the outer side wall of the connecting disc.

[0009] Further, a cable tie is arranged at the outer side of the connecting sleeve and corresponding to the clamping ring.

[0010] Further, a fixing plate is arranged at the outer end of the third cavity, and the connecting disc is attached to the fixing plate.

[0011] Further, the inner diameter of the first rubber sleeve gradually decreases from outside to inside.

[0012] Further, a second rubber sleeve is arranged in the second cavity, the inner diameter of the second rubber sleeve gradually increases from outside to inside, the inner diameters of the first rubber sleeve and the second rubber sleeve are equal at the joint position and are in communication, and the large-diameter end of the second rubber sleeve is in communication with the third rubber sleeve.

[0013] Further, the outer side wall of the clamping part is arc-shaped, and the clamping ring is smoothly connected with the connecting sleeve.

[0014] The positive effect of the utility model is:

[0015] The protective cover of the utility model adopts an integrated closed design, the cable is first inserted into the protective cover through the wire inlet when in use, and after the installation of the terminal is completed, the connecting part is installed together with the top end of the current transformer, so that the protective cover and the vacuum circuit breaker can be connected without the need of installing a fixing device outside the house, and the installation is simpler and more convenient. DRAWINGS

[0016] Figure 1 It is a structural schematic view of the utility model;

[0017] Figure 2 It is a structural schematic view of the protective cover of the utility model;

[0018] Figure 3 It is a schematic view of the joint of the utility model. CONCRETE IMPLEMENTING METHOD

[0019] As shown in the accompanying Figures 1-3 The utility model discloses a primary and secondary fusion high voltage vacuum circuit breaker, including circuit breaker body 1, the current transformer top end of setting in circuit breaker body 1's joint 2, setting in the wire terminal 5 of joint 2 one side and installing the protective cover 4 of joint 2, after protective cover installation, wire terminal is located in the inside of protective cover, and protective cover insulates wire terminal with outside environment, avoids dust and water pollution wire terminal, effectively prolongs the service life of circuit breaker.

[0020] The protective cover 4 includes a shell, a wire inlet arranged at one end of the shell, and a connecting part arranged at the other end of the shell, the connecting part is matched with the joint 2 to realize the connection between the protective cover 4 and the joint 2. Figure 2As shown, the shell includes first cavity 401, second cavity 402 and third cavity 403 connected in sequence from left to right, and the inner diameter of the first, second and third cavities gradually increases. First rubber sleeve 7 is provided in the first cavity 401, second rubber sleeve 8 is provided in the second cavity 402, and hollow third rubber sleeve 9 is provided in the third cavity 403.

[0021] First rubber sleeve 7 is hollow as a wire inlet, and the inner diameter of first rubber sleeve 7 gradually decreases from outside to inside (i.e. from left to right as shown), which helps the cable to enter the protective cover 4 from the left side, and first rubber sleeve 7 can also tightly fit with the cable to form a seal to prevent water or dust from entering the inside of the protective cover 4. Figure 2 Second rubber sleeve 8 is also hollow, and the inner diameter of second rubber sleeve 8 gradually increases from outside to inside (i.e. from left to right as shown), the first and second rubber sleeves 8 are in contact, and the inner diameters at the contact position are equal, second rubber sleeve 8 can also tightly fit with the cable to form a seal, having a double sealing effect, which can effectively prevent water and dust from entering the inside of the protective cover 4 from the wire inlet side. Figure 2 Second rubber sleeve 8 is also hollow, and the inner diameter of second rubber sleeve 8 gradually increases from outside to inside (i.e. from left to right as shown), the first and second rubber sleeves 8 are in contact, and the inner diameters at the contact position are equal, second rubber sleeve 8 can also tightly fit with the cable to form a seal, having a double sealing effect, which can effectively prevent water and dust from entering the inside of the protective cover 4 from the wire inlet side.

[0022] The right side end of third rubber sleeve 9 is integrally provided with a connecting portion, which includes a connecting disc 10 in the form of a ring, a connecting sleeve 11 vertically provided on the outer edge of connecting disc 10, and a clamping ring 12 provided on the inner side wall of connecting sleeve 11, and the right side end of third rubber sleeve 9 is connected with the inner edge of connecting disc 10. One end of connector 2 is provided with a clamping portion 3, and the terminal is located at one end of clamping portion 3. An annular groove 6 is provided between clamping portion 3 and connector 2, and clamping ring 12 is connected with annular groove 6, so as to connect protective cover 4 and connector 2 together. After installation, clamping portion 3 is fitted in the space between connecting disc 10 and clamping ring 12. Preferably, in order to make the connection between connecting portion and clamping portion 3 more smooth, the outer side wall of clamping portion 3 is arc-shaped, and the connection between clamping ring 12 and connecting sleeve 11 is smoothly transitioned. The connecting portion is also made of rubber material, so that the connecting portion and clamping portion 3 can be connected together by force, realizing fixation, and installation is more simple and convenient. If it is worried that the connection between connecting portion and clamping portion 3 is not tight enough, a tie 13 can also be provided at the position corresponding to clamping ring 12 on the outside of connecting sleeve 11, and the tie 13 can be tightly bound to effectively improve the connection stability and sealing effect, and the tie 13 is also relatively convenient to install.

[0023] Two sealing rings 14 are provided on the outer side wall of connecting disc 10, i.e. the side in contact with connector 2, to further improve the sealing performance.

[0024] A fixing plate 404 is arranged at the outer end of the third cavity 403, and the connecting disc 10 is fixedly connected with the fixing plate 404, so that the connecting disc 10 can be supported and prevented from being deformed during installation.

[0025] The internal space of the third rubber sleeve 9 can be used as a placing space of the wiring terminal 5, one end of the protective cover 4 is sealed with the cable, and the other end is sealed with the connector 2, so that the wiring terminal 4 is completely isolated from the outside, the circuit breaker damage caused by water immersion or dust can be effectively prevented, and the service life of the circuit breaker is prolonged. At the same time, the whole protective cover is designed in an integrated mode, and can be directly clamped with the connector during installation, without the help of an additional buckle structure, so that the installation is more simple and convenient, and the installation efficiency is improved.

[0026] The above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the utility model examples.

Claims

1. A primary and secondary integrated high-voltage vacuum circuit breaker, characterized in that... It includes a circuit breaker body (1), a connector (2) located on the top of the current transformer of the circuit breaker body (1), a terminal block (5) located on one side of the connector (2), and a protective cover (4) installed on the connector (2) and covering the outside of the terminal block (5); the protective cover (4) includes an outer shell, an inlet located at one end of the outer shell, and a connecting part located at the other end of the outer shell. The outer shell includes a first cavity (401), a second cavity (402), and a third cavity (403) connected in sequence with increasing inner diameters. A first rubber sleeve (7) is provided inside the first cavity (401). The first rubber sleeve (7) is hollow and serves as the inlet. A third rubber sleeve (9) is provided inside the third cavity (403). The connecting part is located at the outer end of the third rubber sleeve (9).

2. The primary and secondary integrated high-voltage vacuum circuit breaker according to claim 1, characterized in that... The connecting part includes an annular connecting disc (10), a connecting sleeve (11) vertically disposed on the outer edge of the connecting disc (10), and a snap ring (12) disposed on the inner wall of the connecting sleeve (11). The inner edge of the connecting disc (10) is fixedly connected to the outer end of the third rubber sleeve (9). A snap part (3) is provided at the end of the connector (2). An annular groove (6) is provided between the snap part (3) and the connector (2). The snap ring (12) is adapted to the annular groove (6). The snap part (3) is fitted and installed between the connecting disc (10) and the snap ring (12).

3. A primary and secondary integrated high-voltage vacuum circuit breaker according to claim 2, characterized in that... Two sealing rings (14) are provided on the outer wall of the connecting plate (10).

4. A primary and secondary integrated high-voltage vacuum circuit breaker according to claim 2, characterized in that... A cable tie (13) is provided on the outside of the connecting sleeve (11) and at a position corresponding to the snap ring (12).

5. A primary and secondary integrated high-voltage vacuum circuit breaker according to any one of claims 2-4, characterized in that... A fixing plate (404) is provided at the outer end of the third cavity (403), and the connecting plate (10) is attached to the fixing plate (404).

6. A primary and secondary integrated high-voltage vacuum circuit breaker according to claim 1, characterized in that... The inner diameter of the first rubber sleeve (7) gradually decreases from the outside to the inside.

7. A primary and secondary integrated high-voltage vacuum circuit breaker according to claim 6, characterized in that... A second rubber sleeve (8) is provided in the second cavity (402). The inner diameter of the second rubber sleeve (8) gradually increases from the outside to the inside. The inner diameters of the first rubber sleeve (7) and the second rubber sleeve (8) are equal and connected at the joint position. The large diameter end of the second rubber sleeve (8) is connected to the third rubber sleeve (9).

8. A primary and secondary integrated high-voltage vacuum circuit breaker according to claim 2, characterized in that... The outer wall of the snap-fit ​​part (3) is arc-shaped, and the connection between the snap-fit ​​ring (12) and the connecting sleeve (11) is smoothly transitioned.

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