CN220439542U

CN220439542U - Circuit breaker

Info

Publication number: CN220439542U
Application number: CN202322125113.1U
Authority: CN
Inventors: 管瑞良; 朱永清; 周敏琛
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2023-08-08
Filing date: 2023-08-08
Publication date: 2024-02-02
Anticipated expiration: 2033-08-08

Abstract

A circuit breaker belongs to the technical field of piezoelectric devices. Including housing and the secondary terminal that inserts that is located the top, the secondary terminal that inserts be located the front side of circuit breaker, and the housing be located the rear of secondary terminal, characteristics are: the cover is made of insulating material and is located above the arc-extinguishing chamber of the circuit breaker, the arc-extinguishing chamber is provided with a cover plate located at the top, and the cover is fixed on the cover plate. The advantages are that: the insulation property of the circuit breaker shell is ensured; the internal space of the circuit breaker is reasonable in arrangement, and the internal components are quite convenient to assemble and disassemble; the strength of each part is high, the impact resistance is strong, and the service life of the circuit breaker is prolonged.

Description

Circuit breaker

Technical Field

The utility model belongs to the technical field of piezoelectric devices, and particularly relates to a circuit breaker.

Background

The universal circuit breaker is widely used in low-voltage power supply and distribution systems due to its excellent protection characteristics. When the current is disconnected by the contact system in the universal circuit breaker, an arc is generated, and after the arc is extinguished in the arc extinguishing chamber, the gas is discharged outwards from the arc extinguishing chamber.

Because the new energy market of scene expands rapidly, various cabinet body whole space size is limited, needs relevant component arrangement reasonable, compact to save space, and then reduces the cubical switchboard size. The main circuit busbar in the cabinet is various in wiring, and in order to ensure the insulating property of adjacent elements in reasonable space, higher requirements are put forward on the mounting structure of the circuit breaker shell. In the original frame circuit breaker structure, the metal housing above the arc extinguishing chamber and the mounting mode of the housing have potential safety hazards in safety and maintenance, so that higher requirements are put forward on the insulating performance of the existing universal circuit breaker.

Disclosure of Invention

The utility model aims to provide a circuit breaker, which is characterized in that an insulating housing is arranged at the top of the circuit breaker, is made of insulating materials and is positioned above an arc extinguishing chamber, so that the insulating safety of the circuit breaker is improved greatly, and the circuit breaker can meet the requirements of a wind-solar new energy market.

The object of the utility model is achieved in that a circuit breaker comprises a housing and a secondary plug terminal at the top, the secondary plug terminal being located at the front side of the circuit breaker and the housing being located behind the secondary plug terminal, the housing being made of an insulating material and being located above an extinguishing chamber of the circuit breaker, the extinguishing chamber having a cover plate at the top, the housing being fixed to the cover plate.

In one specific embodiment of the utility model, the secondary plug terminal is mounted on a bracket of the circuit breaker, the bracket being mounted between a pair of side plates of the circuit breaker.

In yet another specific embodiment of the present utility model, the housing includes a top plate, side plates, a front side plate and a rear side plate, the side plates forming a pair, together with the front side plate and the rear side plate, forming a cofferdam, located around the top plate and extending downward.

In a further specific embodiment of the utility model, the top plate is provided with screw receiving posts on the side facing the arc extinguishing chamber, from which screws of the circuit breaker are passed and screwed into the cover plate, so that a fixed connection of the cover housing to the cover plate is achieved.

In yet another specific embodiment of the present utility model, the bracket includes a first mounting plate and a second mounting plate, the first mounting plate being used for mounting the secondary connector terminal; the second mounting plate is provided with a positioning hole, the front side plate is provided with a clamping boss, and the positioning hole is matched with the clamping boss in an embedded mode, so that the positioning and mounting of the housing and the bracket are realized.

In still another specific embodiment of the present utility model, the positioning hole is "L" shaped, and the corresponding positioning boss is also "L" shaped.

In a further specific embodiment of the present utility model, the side plate is provided with a plurality of exhaust holes, and the exhaust holes are in a strip shape and are arranged side by side at intervals.

In yet another specific embodiment of the utility model, the top plate is provided with a reinforcing rib on the side having the screw receiving post.

In yet a further embodiment of the utility model, the stiffener is also located on the rear side panel.

Due to the adoption of the structure, compared with the prior art, the utility model has the beneficial effects that: firstly, the housing is made of insulating materials, and after ionized gas is discharged from the arc extinguishing chamber and contacts the housing, the housing is not electrified, so that the insulativity of the circuit breaker housing is fully ensured; secondly, the internal space of the circuit breaker is reasonably arranged, and the internal components of the circuit breaker are quite convenient to assemble and disassemble; third, each spare part intensity is high, and shock resistance is strong, prolongs the life of circuit breaker.

Drawings

Fig. 1 is a schematic diagram of a circuit breaker according to the present utility model;

fig. 2 is an exploded view of a circuit breaker according to the present utility model;

fig. 3 is a partial exploded view of a circuit breaker according to the present utility model;

FIG. 4 is a schematic view of the mounting and mating of the housing, bracket, baffle, and base of the present utility model;

FIG. 5 is a schematic side view of a housing in accordance with the present utility model;

FIG. 6 is another schematic view of a housing in accordance with the present utility model;

FIG. 7 is a schematic side view of a bracket according to the present utility model;

FIG. 8 is another schematic view of a bracket according to the present utility model;

FIG. 9 is a schematic side view of a baffle according to the present utility model;

FIG. 10 is another schematic view of a baffle according to the present utility model;

fig. 11 is a cross-sectional view of the case and arc extinguishing chamber of the present utility model.

In the figure: 1. the device comprises a housing, a top plate, a screw accommodating column, a reinforcing rib, a side plate, an exhaust hole, a front side plate, a clamping boss and a rear side plate, wherein the housing, the top plate and the screw accommodating column are respectively arranged at the front side plate and the rear side plate, the screw accommodating column is respectively arranged at the rear side plate and the rear side plate, the reinforcing rib is respectively arranged at the front side plate and the rear side plate, and the screw accommodating column is respectively arranged at the rear side plate and the rear side plate; 2. the device comprises a bracket, a first mounting plate, a mounting hole, a second mounting plate, a 221 positioning hole, a 222 yielding hole, a 223 first fixing hole, a 224 second fixing hole and a 23 clamping hole, wherein the bracket is provided with a first mounting plate and a 211 mounting hole; 3. a secondary plug terminal; 4. baffle plate, 41, baffle plate part, 411, fixing column, 412, reinforcing rib, 42, cofferdam, 421, external convex rib, 43 and clamping edge; 100. arc extinguishing chamber, 101. Cover plate; 200. a base.

Detailed Description

The following detailed description of specific embodiments of the utility model, while given in connection with the accompanying drawings, is not intended to limit the scope of the utility model, and any changes that may be made in the form of the inventive concepts described herein, without departing from the spirit and scope of the utility model.

In the following description, all concepts related to the directions (or azimuths) of up, down, left, right, front and rear are directed to the position states where the drawings are being described, so as to facilitate public understanding, and thus should not be construed as being particularly limiting to the technical solutions provided by the present utility model.

As shown in fig. 1 and 2, the present utility model relates to a circuit breaker, wherein a housing 1 and a secondary connector 3 are mounted on the top of the circuit breaker, the secondary connector 3 is mounted on a bracket 2 of the circuit breaker, and the bracket 2 is mounted between a pair of side plates of the circuit breaker.

The circuit breaker is provided with an arc extinguishing chamber 100, an arc generated by a contact system (not shown in the figure) positioned in the circuit breaker enters the arc extinguishing chamber 100 and extinguishes in the arc extinguishing chamber 100, and generated gas is discharged out of the arc extinguishing chamber 100 after being dissociated by the arc extinguishing chamber 100.

The housing 1 and the secondary connector terminal 3 are both positioned at the top of the circuit breaker, and the secondary connector terminal 3 is positioned at the front side of the housing 1, namely the housing 1 is positioned at the rear side of the secondary connector terminal 3. The housing 1 corresponds in position to the arc extinguishing chamber 100, i.e. the housing 1 is located above the arc extinguishing chamber 100.

A baffle 4 is arranged between the housing 1 and the secondary plug-in terminal 3. The baffle 4 isolates the secondary connector terminal 3 from the housing 1, so as to prevent the secondary connector terminal 3 from contacting the gas exhausted from the arc extinguishing chamber 1 and prevent the secondary connector terminal 3 from being damaged by ionized gas.

The housing 1 is fixed to the arc extinguishing chamber 100, specifically, the housing 1 is fixed to the arc extinguishing chamber 100 by a screw 5. Screws 5 are screwed onto the arc extinguishing chamber 100 through the casing 1, thereby completing the installation and fixation of the casing 1.

As shown in fig. 3 and 4, the mounting process of the housing 1, the bracket 2 and the baffle 4 is as follows: the bracket 2 is firstly installed on the base 200 of the circuit breaker, specifically, after the bracket 2 is placed in place, the bracket 2 and the base 200 are fixed by screws. The baffle 4 is mounted on the bracket 2 from the rear side of the bracket 2, and the baffle 4 and the bracket are tightened by screws. Finally, after the housing 1 is clamped in place, the housing 1 is fixedly connected with the arc extinguishing chamber 100 through screws.

Fig. 5 and 6 are schematic views of the housing 1. The housing 1 includes a top plate 11, side plates 12, a front side plate 13, and a rear side plate 14. The side plates 12 are a pair, and form a cofferdam together with a front side plate 13 and a rear side plate 14, and are positioned around the top plate 11 and extend downwards.

In this embodiment, the casing 1 is an integral part made of an insulating material, preferably a thermosetting material, for example: BMC, DMC, etc. Since the housing 1 is made of an insulating material, the housing 1 is not electrified even after the ionized gas is discharged from the arc extinguishing chamber 100 and contacts the housing 1, thereby sufficiently ensuring the insulation of the circuit breaker housing.

Preferably, the top plate 11 is provided with a screw receiving post 111 on a side facing the arc extinguishing chamber 100, and the screw 5 of the circuit breaker is inserted through the screw receiving post 111 and screwed into the cover plate 101, thereby fixedly connecting the cover 1 with the cover plate 101 of the arc extinguishing chamber 100. The screw 5 is positioned in the screw receiving post 5 after tightening, thereby effectively preventing ionized gas from contacting the screw 5.

The side plate 12 is provided with a plurality of exhaust holes 121, and the exhaust holes 121 are in a strip shape and are arranged side by side at intervals.

Preferably, the screw receiving post 111 is cylindrical. More preferably, a reinforcing rib 112 is provided on the inner side of the top plate 11, i.e., the side facing the arc extinguishing chamber 100, and the reinforcing rib 112 is further located on the rear side plate 14.

The front side plate 13 is provided with a clamping boss 131, and the clamping boss 131 is matched with the bracket 2 in a clamping way, so that the housing 1 is positioned.

Fig. 7 and 8 are schematic views of the bracket 2. The support 2 is typically a sheet metal part. Namely, the bracket 2 is formed by bending a metal plate. The bracket 2 comprises a first mounting plate 21 and a second mounting plate 22. The first mounting plate 21 and the second mounting plate 22 are 90 degrees. Wherein the first mounting plate 21 is used for mounting the secondary connector terminal 3, and the second mounting plate 22 is used for fixedly connecting the mounting plate 22 with the base 200.

The bracket 2 is also provided with a clamping hole 23, and the clamping hole 23 is used for positioning and mounting the baffle 4. Preferably, two clamping holes 23 are provided at intervals. The clamping hole 23 is located at the joint of the first mounting plate 21 and the second mounting plate 22.

Specifically, the first mounting plate 21 is provided with a mounting hole 211, and the mounting hole 211 is used for fixing the secondary connector 3 to the first mounting plate 21 of the bracket 2.

The second mounting plate 22 is provided with a positioning hole 221, and the positioning hole 221 is in embedded fit with the clamping boss 131. Preferably, the positioning hole 221 is "L" shaped, and the corresponding detent boss 131 is "L" shaped.

There is no relief hole 222 in the second mounting plate 22, and the relief hole 222 allows the nut to be positioned in the base 200. The second mounting plate 22 is further provided with first fixing holes 223, and the two first fixing holes 223 in the middle are used for fixedly connecting the bracket 2 with the base 200.

A second fixing hole 224 is further provided between the two clamping holes 23, and the second fixing hole 224 is used for fixing the connection between the bracket 2 and the baffle 4.

Fig. 9 and 10 are schematic views of the baffle 4. The baffle 4 is made of an insulating material, typically a thermosetting or thermo-rapid material. The baffle 4 comprises a baffle part 41 and cofferdams 42 positioned around the baffle part 41. In turn, the baffle 4 forms a cavity. The accommodating cavity is used for accommodating the wire harness of the secondary plugging terminal 3, so that the arrangement of the internal space of the circuit breaker is more reasonable, and the disassembly and assembly of the internal components of the circuit breaker are more convenient.

The baffle portion 41 is provided with a fixing column 411, the fixing column 411 is matched with the second fixing hole 224, and a nut is arranged in the fixing column 411. The screw is screwed into the nut in the fixing column 411 through the second fixing hole 224, so that the baffle 4 is fixedly connected with the bracket 2.

Reinforcing ribs 412 are also provided on the inner side of the baffle portion 41. The reinforcing ribs 412 can increase the strength of the baffle 4 and prevent the baffle from being deformed or broken by impact.

An external rib 421 is further provided on the outer side of the cofferdam 42, and the external rib 421 can strengthen the strength of the cofferdam 42.

Two sides of the cofferdam 42 are provided with clamping edges 43, the clamping edges 43 are matched with the clamping holes 23 in a clamping way, namely, the clamping edges 43 are clamped on one side edge of the clamping holes 23, so that the positioning and the installation between the baffle 4 and the bracket 2 are realized. Specifically, the clamping edge 43 is a pair of U-shaped open slots with openings on two opposite sides, and the edge of the clamping hole 23 is clamped into the U-shaped open slots to realize the clamping fit of the two.

As shown in fig. 11, the arc-extinguishing chamber 100 has a cover plate 101 at the top, and screws are inserted through screw receiving posts 111 and screwed into the cover plate 101 to achieve a fixed mounting of the housing 1 to the arc-extinguishing chamber 100.

Claims

1. The utility model provides a circuit breaker, includes housing (1) and secondary connection terminal (3) that are located the top, secondary connection terminal (3) be located the front side of circuit breaker, and housing (1) be located the rear of secondary connection terminal (3), its characterized in that: the housing (1) is made of insulating material and is positioned above the arc extinguishing chamber (100) of the circuit breaker, the arc extinguishing chamber (100) is provided with a cover plate (101) positioned at the top, and the housing (1) is fixed on the cover plate (101).

2. A circuit breaker according to claim 1, characterized in that: the secondary connector terminal (3) is arranged on a bracket (2) of the circuit breaker, and the bracket (2) is arranged between a pair of side plates of the circuit breaker.

3. A circuit breaker according to claim 2, characterized in that: the cover shell (1) comprises a top plate (11), side plates (12), a front side plate (13) and a rear side plate (14), wherein the side plates (12) are a pair, form a cofferdam together with the front side plate (13) and the rear side plate (14), and are positioned around the top plate (11) and extend downwards.

4. A circuit breaker according to claim 3, characterized in that: the top plate (11) is provided with a screw accommodating column (111) on one side surface facing the arc extinguishing chamber (100), and a screw (5) of the circuit breaker penetrates through the screw accommodating column (111) and is screwed into the cover plate (101), so that the cover shell (1) and the cover plate (101) are fixedly connected.

5. A circuit breaker according to claim 3, characterized in that: the bracket (2) comprises a first mounting plate (21) and a second mounting plate (22), and the first mounting plate (21) is used for mounting the secondary plug-in terminal (3); the second mounting plate (22) is provided with a positioning hole (221), the front side plate (13) is provided with a clamping boss (131), and the positioning hole (221) is in embedded fit with the clamping boss (131), so that the positioning and mounting of the housing (1) and the bracket (2) are realized.

6. A circuit breaker according to claim 5, wherein: the positioning hole (221) is L-shaped, and the corresponding clamping boss (131) is L-shaped.

7. A circuit breaker according to claim 3, characterized in that: the side plates (12) are provided with exhaust holes (121), and the exhaust holes (121) are in a strip shape and are arranged in parallel at intervals.

8. A circuit breaker according to claim 4, wherein: the top plate (11) is provided with a reinforcing rib (112) on the side surface of the side with the screw accommodating column (111).

9. A circuit breaker according to claim 8, wherein: the reinforcing rib (112) is also positioned on the rear side plate (14).