Vacuum circuit breaker with lower leading terminal box

Abstract

The vacuum circuit breaker comprises a conductive loop, an insulation system, a sealing member, a cabinet body and a terminal box, the terminal box is arranged below the cabinet body, the terminal box comprises a box body, a box door, a rubber tube and a terminal seat, an opening is formed in the front surface of the box body, and the box door is arranged on the front surface of the box body. The box door is hinged to the front face of the box body, the box door covers the box body through the box lock installed on the box door between the box door and the box body, the terminal base is installed on the inner wall of the box body, and the two ends of the rubber pipe are communicated with the box body and the cabinet body respectively. According to the vacuum circuit breaker, the terminal box and the cabinet body are arranged in a matched manner, so that the connecting wire harnesses of the electrical elements in the vacuum circuit breaker can be safely led into the terminal box from the cabinet body, and therefore, maintenance and management personnel can conveniently carry out wiring maintenance and overhaul work of the wire harnesses in the terminal box installed at a low position, and the maintenance and overhaul convenience of the vacuum circuit breaker is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vacuum circuit breaker technical field, concretely is a vacuum circuit breaker with lower terminal box. BACKGROUND

[0002] The main structure of high voltage circuit breaker is divided into: flow guide part, arc extinguishing part, insulation part, operating mechanism part. The main type of high voltage switch is divided into: oil circuit breaker, air circuit breaker, vacuum circuit breaker, sulfur hexafluoride circuit breaker, solid gas generating circuit breaker, magnetic blowout circuit breaker according to arc extinguishing medium. Among them, the contact of vacuum circuit breaker is sealed in high vacuum arc extinguishing chamber, and arc is extinguished by using high insulation performance of vacuum.

[0003] The high voltage vacuum circuit breaker commonly seen in the prior art comprises a conductive loop, an insulation system, a sealing element and a shell. However, the shell is generally divided into two parts and accommodates the control part and the arc extinguishing part in the conductive loop respectively, and the smaller shell is generally locked and fixed to the side of the larger shell by using fasteners such as bolts. Since the installation position of the high voltage vacuum circuit breaker is generally at a high position, the connection line bundle of the electrical elements accommodated in the high voltage vacuum circuit breaker needs to be connected and maintained by climbing with the aid of a ladder or the like, which has certain safety risks and is inconvenient for maintenance operation. UTILITY MODEL CONTENTS

[0004] (I) Technical problem solved

[0005] The utility model provides a vacuum circuit breaker with lower terminal box, solves the problem raised in the above background technology.

[0006] (II) Technical scheme

[0007] In order to achieve the above object, the utility model provides the following technical scheme: a vacuum circuit breaker with lower terminal box, comprising a conductive loop, an insulation system, a sealing element, a cabinet body and a terminal box, the terminal box is arranged below the cabinet body, and the terminal box comprises a box body, a box door, a rubber pipe and a terminal seat, an opening is formed in the front of the box body, the box door is hinged to the front of the box body, and the box door and the box body are covered by the box lock arranged on the box door, the terminal seat is installed and arranged on the inner wall of the box body, the two ends of the rubber pipe are communicated with the box body and the cabinet body respectively, the cable passing out of the cabinet body is introduced into the box body through the rubber pipe, and the lower end of the cable passing out of the cabinet body is connected to the terminal seat.

[0008] Preferably, the outer side of the one end of the rubber pipe close to the box body is further sleeved with a sealing sleeve, the sealing sleeve is inserted into the box body and is connected with the box body by clamping, and sealing glue is coated at the joint between the sealing sleeve and the box body.

[0009] In a further preferred embodiment, the terminal seat is provided with a wire connecting portion, a plurality of independent distributed connecting holes are formed in the wire connecting portion, so that the cable passing through the cabinet can be connected in the connecting hole of the wire connecting portion.

[0010] In a further preferred embodiment, the front, back and opposite two sides of the cabinet are formed with access openings, the front and back of the cabinet are respectively hinged with a cabinet door, and the two cabinet doors cover the access openings of the front and back of the cabinet respectively; the left and right sides of the cabinet are respectively hinged with a left side door and a right side door, and the left and right side doors cover the access openings of the opposite two sides of the cabinet respectively.

[0011] In a further preferred embodiment, the two cabinet doors, the left side door and the right side door are sealed and connected with the cabinet by rubber inflatable sealing rings, and the two cabinet doors, the left side door and the right side door are respectively provided with a door lock structure, so that the two cabinet doors, the left side door and the right side door are connected with the cabinet in an openable and closable manner.

[0012] In a further preferred embodiment, the cabinet is a stainless steel plastic spraying cabinet structure, and at least two symmetrically distributed bottom supports are fixedly connected to the bottom of the cabinet.

[0013] (Three) beneficial effects

[0014] Compared with the prior art, the utility model provides a vacuum circuit breaker with a lower terminal box, which has the following beneficial effects:

[0015] In the utility model, the connection wire harness of the electrical element in the vacuum circuit breaker can be safely drawn from the cabinet to the terminal box, so that the maintenance and management personnel can conveniently perform the wire harness maintenance and repair work in the terminal box installed at a low place, and the convenience of vacuum circuit breaker maintenance and repair is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view of the vacuum circuit breaker with a lower terminal box according to the embodiment;

[0017] Figure 2 It is a schematic view of the internal structure of the terminal box according to the embodiment;

[0018] Figure 3 It is Figure 2 It is a schematic view of the structure of the terminal box at another angle.

[0019] In the figure: 10, cabinet; 20, bottom support; 30, cabinet door; 40, terminal box; 41, box body; 42, box door; 43, rubber tube; 431, sealing sleeve; 44, terminal seat; 441, wire connecting portion; 50, left side door; 60, right side door. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 3 A vacuum circuit breaker with a bottom terminal box includes a conductive circuit, an insulation system, a sealing element, a cabinet 10, and a terminal box 40 disposed below the cabinet 10. The terminal box 40 includes a cabinet 41, a door 42, a rubber tube 43, and a terminal base 44. An opening is formed on the front of the cabinet 41, and the door 42 is hinged to the front of the cabinet 41. A lock installed on the door 42 allows the door 42 to close and lock the cabinet 41. Additionally, a sealing ring can be provided between the door 42 and the cabinet 41 to prevent water from flowing into the cabinet 41 after the door 42 is locked. The two ends of the rubber tube 43 are connected to the cabinet 10 and the cabinet 41, respectively, allowing cables passing through the cabinet 10 to be introduced into the cabinet 41 via the rubber tube 43. Terminal block 44 is installed on the inner wall of enclosure 41, and the lower end of the cable passing through the cabinet 10 can be connected to terminal block 44.

[0022] In this embodiment, a sealing sleeve 431 is also provided on the outer side of the end of the rubber tube 43 near the box 41. The sealing sleeve 431 is inserted into the box 41 and fixedly connected to it. The joint between the sealing sleeve 431 and the box 41 is also coated with sealant to prevent water from entering the box 41 from between the rubber tube 43 and the box 41.

[0023] In this embodiment, a wire connection portion 441 is provided on the terminal block 44, and multiple independently distributed connection holes are formed in the wire connection portion 441 so that the cables passing through the cabinet 10 can be wired through the connection holes of the wire connection portion 441.

[0024] In the embodiment, the front side, the back side and the opposite two side faces of the cabinet body 10 are formed with access openings, the front side and the back side of the cabinet body 10 are respectively hinged with a cabinet door 30, and the two cabinet doors 30 cover the access openings of the front side and the back side of the cabinet body 10 respectively; the left side and the right side of the cabinet body 10 are respectively hinged with a left side door 50 and a right side door 60, and the left side door 50 and the right side door 60 cover the access openings of the opposite two side faces of the cabinet body 10 respectively. In addition, the two cabinet doors 30, the left side door 50 and the right side door 60 and the cabinet body 10 are all connected by rubber inflatable sealing rings to avoid water flowing into the cabinet body 10. The two cabinet doors 30, the left side door 50 and the right side door 60 are all provided with door lock structures, so that the two cabinet doors 30, the left side door 50 and the right side door 60 are connected with the cabinet body 10 in an openable and closable manner.

[0025] In the embodiment, the cabinet body 10 can be made of a stainless steel plate by spraying plastic, and the bottom of the cabinet body 10 is fixedly connected with at least two symmetrically distributed bottom supports 20 to facilitate placing and supporting the cabinet body 10.

[0026] In the vacuum circuit breaker in the embodiment, the conductive loop is connected by the in-out line conductive copper bar, the conductive clamp, the soft connection and the vacuum arc-extinguishing chamber.

[0027] In all the above-mentioned solutions, the connection between the two components can be selected according to the actual situation, such as welding, bolt and nut cooperation connection, bolt or screw connection or other known connection modes, which will not be described one by one. In the above, whenever it is mentioned that it is fixedly connected, it is preferred to consider welding. Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum circuit breaker with a downlead terminal box comprising an electrically conductive return circuit, an insulation system, a seal and a cabinet (10), characterized in that, Also include terminal box (40), the terminal box (40) is arranged below the cabinet body (10), and the terminal box (40) includes box (41), box door (42), rubber tube (43) and terminal seat (44), the front of the box (41) is formed with an opening, the box door (42) is hinged on the front of the box (41), and the box door (42) and the box (41) are sealed between the box lock installed on the box door (42) so that the box door (42) covers the box (41), the terminal seat (44) is installed on the inner wall of the box (41), the two ends of the rubber tube (43) are communicated with the box (41) and the cabinet body (10) respectively, the cable passing through the cabinet body (10) is introduced into the box (41) through the rubber tube (43), and the lower end of the cable passing through the cabinet body (10) is connected to the terminal seat (44).

2. A vacuum circuit breaker having a down lead terminal box as claimed in claim 1, wherein: The outer side of the rubber tube (43) close to the one end of the box (41) is further sleeved with a sealing sleeve (431), the sealing sleeve (431) is inserted on the box (41) and is connected with the clamping, and the joint between the sealing sleeve (431) and the box (41) is further coated with sealing glue.

3. A vacuum circuit breaker having a down lead terminal box as claimed in claim 1, wherein: The terminal seat (44) is provided with a wire connecting part (441), a plurality of independent distributed connecting holes are formed in the wire connecting part (441), so that the cable passing through the cabinet body (10) can be wired in the connecting hole of the wire connecting part (441).

4. A vacuum circuit breaker having a down lead terminal box as claimed in claim 1, wherein: The front, back and opposite two sides of the cabinet body (10) are formed with access holes, the front and back of the cabinet body (10) are respectively hinged with a cabinet door (30), and the two cabinet doors (30) cover the access holes of the front and back of the cabinet body (10) respectively; the left and right sides of the cabinet body (10) are respectively hinged with a left door (50) and a right door (60), and the left door (50) and the right door (60) cover the access holes of the opposite two sides of the cabinet body (10) respectively.

5. A vacuum circuit breaker having a down lead terminal box as claimed in claim 4, wherein: The two cabinet doors (30), left door (50) and right door (60) and cabinet body (10) are sealed and connected by rubber inflatable sealing ring, and the door lock structure is installed on the two cabinet doors (30), left door (50) and right door (60), so that the two cabinet doors (30), left door (50) and right door (60) and cabinet body (10) are connected.

6. A vacuum circuit breaker having a down lead terminal box as claimed in claim 1, wherein: The cabinet body (10) is arranged as a stainless steel plastic spraying cabinet structure, and at least two symmetrically distributed bottom supports (20) are fixedly connected to the bottom of the cabinet body (10).

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