Vacuum circuit breaker with lower leading terminal box

Abstract

The vacuum circuit breaker comprises a conductive loop, an insulation system, a sealing element, a cabinet body and the terminal box, the terminal box is arranged below the cabinet body, the terminal box comprises a box body, a box door, a rubber pipe and a terminal base, an opening is formed in the front face of the box body, the box door is hinged to the front face of the box body, and the rubber pipe is arranged in the box body. A box lock arranged on the box door is arranged between the box door and the box body, so that the box door covers the box body, the terminal seat is arranged on the inner wall of the box body, and two ends of the rubber pipe are respectively communicated with the box body and the cabinet body. 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 present invention relates to the technical field of vacuum circuit breakers, in particular to a vacuum circuit breaker with a down-lead terminal box. Background Art

[0002] The main components of a high-voltage circuit breaker are generally divided into: the current guide section, the arc extinguishing section, the insulation section, and the operating mechanism. High-voltage switchgear is categorized by the arc extinguishing medium: oil circuit breakers, air circuit breakers, vacuum circuit breakers, sulfur hexafluoride circuit breakers, solid gas circuit breakers, and magnetic blowout circuit breakers. Vacuum circuit breakers, in particular, have their contacts sealed within a high-vacuum arc extinguishing chamber, utilizing the high insulating properties of the vacuum to extinguish the arc.

[0003] Common high voltage vacuum circuit breakers in the prior art include Figure 1 The above-mentioned structure includes a conductive circuit, an insulation system, a seal, and a housing. However, the housing is generally divided into two parts, which respectively house the control part and the arc extinguishing part of the conductive circuit. The smaller housing is generally fixed to the side of the larger housing using fasteners such as bolts. Since the high-voltage vacuum circuit breaker is generally installed at a high position, the wiring and maintenance operations of the electrical components contained therein often require the use of tools such as escalators to access the wiring harness at a height, which poses certain safety risks and is also relatively inconvenient for maintenance operations. Summary of the Invention

[0004] (1) Technical problems solved

[0005] The present invention provides a vacuum circuit breaker with a down-lead terminal box, which solves the problems raised in the above background technology.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a vacuum circuit breaker with a down-lead terminal box, comprising a conductive circuit, an insulation system, a seal, a cabinet and a terminal box, wherein the terminal box is arranged below the cabinet, and the terminal box comprises a box body, a box door, a rubber tube and a terminal seat, an opening is formed on the front of the box body, the box door is hinged on the front of the box body, and a box lock installed on the box door is used to make the box door cover the box body, the terminal seat is installed on the inner wall of the box body, the two ends of the rubber tube are respectively connected to the box body and the cabinet body, the cables passing through the cabinet body are introduced into the box body through the rubber tube, and the lower ends of the cables passing through the cabinet body are connected to the terminal seat.

[0008] Preferably, a sealing sleeve is sleeved on the outer side of one end of the rubber tube close to the box body, the sealing sleeve is inserted into the box body and fixedly connected thereto, and a sealant is coated on the joint between the sealing sleeve and the box body.

[0009] It is further preferred that a wire connecting portion is provided on the terminal seat, and a plurality of independently distributed connecting holes are formed in the wire connecting portion, so that the cables passing through the cabinet can be wired in the connecting holes of the wire connecting portion.

[0010] It is further preferred that inspection openings are formed on the front, back and two opposite side surfaces of the cabinet, and a cabinet door is hinged on the front and back sides of the cabinet, and the two cabinet doors respectively cover the inspection openings on the front and back of the cabinet; a left door and a right door are hinged on the left and right sides of the cabinet, and the left door and the right door respectively cover the inspection openings on the opposite sides of the cabinet.

[0011] It is further preferred that the two cabinet doors, the left door and the right door are sealed with the cabinet body by using rubber inflatable sealing rings, and the two cabinet doors, the left door and the right door are installed with door lock structures, so that the two cabinet doors, the left door and the right door are connected with the cabinet body in an openable and closable manner.

[0012] In a further embodiment, the cabinet body is configured as a stainless steel spray-molded cabinet body structure, and at least two symmetrically distributed bottom brackets are fixedly connected to the bottom of the cabinet body.

[0013] (3) Beneficial effects

[0014] Compared with the prior art, the present invention provides a vacuum circuit breaker with a down-lead terminal box, which has the following beneficial effects:

[0015] In the present invention, by coordinating the terminal box and the cabinet, the connection harnesses of the electrical components in the vacuum circuit breaker can be safely led from under the cabinet into the terminal box, thereby facilitating the maintenance and overhaul of the wiring harnesses by maintenance personnel in the terminal box installed at a low position, thereby improving the convenience of maintenance and overhaul of the vacuum circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a front view of a vacuum circuit breaker having a down-lead terminal box according to an embodiment;

[0017] Figure 2 Schematic diagram of the internal structure of the terminal box according to the implementation scheme;

[0018] Figure 3 for Figure 1 Schematic diagram of the structure of the middle terminal box from another angle.

[0019] In the figure: 10, cabinet body; 20, bottom bracket; 30, cabinet door; 40, terminal box; 41, box body; 42, box door; 43, rubber tube; 431, sealing sleeve; 44, terminal seat; 441, wire connection part; 50, left door; 60, right door. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figures 1 to 3 A vacuum circuit breaker with a down-lead terminal box includes a conductive circuit, an insulation system, a seal, a cabinet 10, and a terminal box 40 arranged below the cabinet 10. The terminal box 40 includes a box body 41, a box door 42, a rubber tube 43, and a terminal seat 44. An opening is formed on the front of the box body 41, and the box door 42 can be hinged on the front of the box body 41 to open and close. The box door 42 and the box body 41 can be locked by using a box lock installed on the box door 42. In addition, a sealing ring can be provided between the box door 42 and the box body 41, so that after the box door 42 is locked, the sealing ring can be used to prevent water from flowing from between the box door 42 and the box body 41 into the box body 41. The two ends of the rubber tube 43 are connected to the box body 41 and the cabinet body 10 respectively, and the cables passing through the cabinet body 10 can be introduced into the box body 41 through the rubber tube 43. The terminal seat 44 is mounted on the inner wall of the box body 41 , and the lower end of the cable passing through the cabinet body 10 can be connected to the terminal seat 44 .

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

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

[0024] In this embodiment, inspection openings are formed on the front, back, and two opposite side surfaces of the cabinet 10. A cabinet door 30 is hingedly connected to each of the front and rear sides of the cabinet 10, and the two cabinet doors 30 cover the inspection openings on the front and back of the cabinet 10, respectively. A left door 50 and a right door 60 are hingedly connected to the left and right sides of the cabinet 10, respectively, and the left door 50 and the right door 60 cover the inspection openings on the opposite sides of the cabinet 10, respectively. In addition, the two cabinet doors 30, the left door 50, and the right door 60 are sealed to the cabinet 10 using rubber inflatable sealing rings to prevent water from flowing into the cabinet 10. Door lock structures are also installed on the two cabinet doors 30, the left door 50, and the right door 60, so that the two cabinet doors 30, the left door 50, and the right door 60 can be connected to the cabinet 10 in an openable and closable manner.

[0025] In this embodiment, the cabinet body 10 can be made of a plastic-sprayed stainless steel plate to form a cabinet structure, and at least two symmetrically distributed bottom brackets 20 are fixedly connected to the bottom of the cabinet body 10 to facilitate the placement and support of the cabinet body 10.

[0026] In the vacuum circuit breaker of this embodiment, the conductive circuit is formed by connecting the incoming and outgoing conductive copper bars, the conductive clamps, the flexible connection and the vacuum interrupter.

[0027] In all the schemes mentioned above, the connection between the two parts can be selected according to actual conditions by welding, bolt and nut connection, bolt or screw connection or other well-known connection methods, which will not be described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum circuit breaker with a down-lead terminal box, comprising a conductive circuit, an insulation system, a seal and a cabinet (10), characterized in that: The invention also comprises a terminal box (40), wherein the terminal box (40) is arranged below the cabinet (10), and the terminal box (40) comprises a box body (41), a box door (42), a rubber tube (43) and a terminal seat (44); an opening is formed on the front of the box body (41); the box door (42) is hinged on the front of the box body (41), and a box lock installed on the box door (42) is used between the box door (42) and the box body (41) so that the box door (42) covers the box body (41); the terminal seat (44) is installed on the inner wall of the box body (41); the two ends of the rubber tube (43) are connected to the box body (41) and the cabinet (10) respectively; the cables passing through the cabinet (10) are introduced into the box body (41) through the rubber tube (43), and the lower ends of the cables passing through the cabinet (10) are connected to the terminal seat (44).

2. A vacuum circuit breaker with a down-lead terminal box according to claim 1, characterized in that: A sealing sleeve (431) is sleeved on the outer side of one end of the rubber tube (43) close to the box body (41); the sealing sleeve (431) is inserted into the box body (41) and is fixedly connected thereto; and a sealing glue is coated on the joint between the sealing sleeve (431) and the box body (41).

3. A vacuum circuit breaker with a down-lead terminal box according to claim 1, characterized in that: The terminal seat (44) is provided with a wire connection portion (441), and a plurality of independently distributed connection holes are formed in the wire connection portion (441), so that the cables passing through the cabinet (10) can be wired in the connection holes of the wire connection portion (441).

4. A vacuum circuit breaker with a down-lead terminal box according to claim 1, characterized in that: Inspection openings are formed on the front, back and two opposite side surfaces of the cabinet (10); a cabinet door (30) is hingedly connected to the front and back sides of the cabinet (10), and the two cabinet doors (30) respectively cover the inspection openings on the front and back of the cabinet (10); a left door (50) and a right door (60) are hingedly connected to the left and right sides of the cabinet (10), and the left door (50) and the right door (60) respectively cover the inspection openings on the opposite sides of the cabinet (10).

5. A vacuum circuit breaker with a down-lead terminal box according to claim 4, characterized in that: The two cabinet doors (30), the left door (50) and the right door (60) are sealed and connected to the cabinet body (10) by means of rubber inflatable sealing rings, and the two cabinet doors (30), the left door (50) and the right door (60) are provided with door lock structures, so that the two cabinet doors (30), the left door (50) and the right door (60) are connected to the cabinet body (10) in an openable and closable manner.

6. A vacuum circuit breaker with a down-lead terminal box according to claim 1, characterized in that: The cabinet (10) is configured as a stainless steel spray-molded cabinet structure, and at least two symmetrically distributed bottom brackets (20) are fixedly connected to the bottom of the cabinet (10).

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