CN215527619U

CN215527619U - Plastic case circuit breaker

Info

Publication number: CN215527619U
Application number: CN202120858084.8U
Authority: CN
Inventors: 张洵初; 殷杰; 陈志刚
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2022-01-14
Anticipated expiration: 2031-04-25

Abstract

A molded case circuit breaker belongs to the technical field of low-voltage electrical appliances. Including base, operating device and upper cover, upper cover and base assembly back both inside cavitys that form installation operating device together, operating device installs and closes the separating brake operation to the circuit breaker in the cavity, characteristics are: the insulating component is arranged in a containing cavity for installing the operating mechanism, is positioned on one side or two sides of the operating mechanism and is positioned at an assembly gap formed at the matching position of the base and the upper cover, and separates the operating mechanism from the assembly gap. The advantages are that: the mode of increasing the insulating piece in the inside limited space of circuit breaker realizes carrying out the effect of effective protection to operating device at the disjunction in-process, improves the interphase insulation of circuit breaker and to ground insulating properties.

Description

Plastic case circuit breaker

Technical Field

The utility model belongs to the technical field of low-voltage electric appliances, and particularly relates to a molded case circuit breaker.

Background

The molded case circuit breaker is a protection device in a low-voltage distribution system, and plays a role in connecting or disconnecting normal working current in the low-voltage distribution system and automatically and rapidly cutting off fault current when a circuit has a fault. The molded case circuit breaker generally includes functional components such as a contact arc extinguishing system, an operating mechanism, a release and the like, and the operating mechanism is a very important part in the circuit breaker and performs an operation of breaking a line when the line fails. However, the operating mechanism of the conventional molded case circuit breaker is easily affected by the electric influence between the phases and the ground, and is also easily contaminated by the free gas, so that the circuit breaker has reduced expected insulation performance between the phases and the ground, and therefore, it is necessary to enhance the insulation protection of the operating mechanism of the conventional molded case circuit breaker.

In view of the above-mentioned prior art, there is a need for a reasonable improvement of the structure of the existing molded case circuit breaker. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a molded case circuit breaker, which improves the interphase insulation and ground insulation performance of the circuit breaker by adding an insulation sheet in a limited space inside the circuit breaker.

The utility model is completed in the way that the molded case circuit breaker comprises a base, an operating mechanism and an upper cover, wherein after the upper cover and the base are assembled together, a containing cavity for installing the operating mechanism is formed inside the upper cover and the base, the operating mechanism is installed in the containing cavity to carry out switching on and switching off operation on the circuit breaker, and the molded case circuit breaker is characterized in that: the insulating component is arranged in a containing cavity for installing the operating mechanism, is positioned on one side or two sides of the operating mechanism and is positioned at an assembly gap formed at the matching position of the base and the upper cover, and separates the operating mechanism from the assembly gap.

In a specific embodiment of the utility model, the base is provided with a base side wall positioned on the side and spaced ribs positioned inside, the upper cover is provided with upper cover spaced ribs matched with the spaced ribs and an upper cover side wall matched with the base side wall, when the base is assembled with the upper cover, a side wall assembly gap is formed between the base side wall and the upper cover side wall, and a spaced rib assembly gap is formed between the base spaced ribs and the upper cover spaced ribs.

In another specific embodiment of the present invention, the insulating member includes a first insulating sheet, the sidewall of the base is provided with a receiving cavity, the first insulating sheet is installed in the receiving cavity of the sidewall of the base and located at a side of the operating mechanism close to the sidewall of the base and at an assembling gap formed by assembling the upper cover and the base, an upper edge of the first insulating sheet is higher than the assembling gap between the base and the upper cover, and a lower edge of the first insulating sheet is lower than the assembling gap between the base and the upper cover.

In another specific embodiment of the present invention, the insulating member includes a first insulating sheet, the sidewall of the base is provided with a receiving cavity, the first insulating sheet is installed in the receiving cavity of the sidewall of the base and located at two sides of the operating mechanism and at an assembly gap formed by the assembly of the upper cover and the base, an upper edge of the first insulating sheet is higher than the assembly gap between the base and the upper cover, and a lower edge of the first insulating sheet is lower than the assembly gap between the base and the upper cover.

In another specific embodiment of the present invention, the insulating member includes a second insulating sheet, the second insulating sheet is installed on one side of the operating mechanism close to the spaced ribs of the base and is located at an assembly gap formed by the assembly of the upper cover and the base, and an upper edge of the second insulating sheet is higher than the assembly gap between the base and the upper cover and a lower edge of the second insulating sheet is lower than the assembly gap between the base and the upper cover.

In a further specific embodiment of the present invention, the insulating member includes a second insulating sheet, the second insulating sheet is installed on both sides of the operating mechanism and located at an assembly gap formed by the assembly of the upper cover and the base, and an upper edge of the second insulating sheet is higher than the assembly gap between the base and the upper cover and a lower edge of the second insulating sheet is lower than the assembly gap between the base and the upper cover.

In a further specific embodiment of the present invention, the insulating member includes a first insulating sheet and a second insulating sheet, the sidewall of the base is provided with a receiving cavity, the first insulating sheet is installed in the receiving cavity of the sidewall of the base, and is located at a side of the operating mechanism close to the sidewall of the base and at an assembling gap formed by assembling the upper cover and the base, an upper edge of the first insulating sheet is higher than the assembling gap between the base and the upper cover, a lower edge of the first insulating sheet is lower than the assembling gap between the base and the upper cover, the second insulating sheet is installed at a side of the operating mechanism close to the spaced ribs of the base and at the assembling gap formed by assembling the upper cover and the base, an upper edge of the second insulating sheet is higher than the assembling gap between the base and the upper cover, and a lower edge of the second insulating sheet is lower than the assembling gap between the base and the upper cover.

In a more specific embodiment of the present invention, the operating mechanism is further provided with a mechanism side plate, the mechanism side plate is provided with a first circular boss and a second circular boss, the second insulating sheet is provided with a first circular hole matched with the first circular boss, and a second circular hole matched with the second circular boss, the first circular hole is concentric with the first circular boss, the second circular hole is concentric with the second circular boss, and the second insulating sheet is mounted on the mechanism side plate through the first circular boss and the second circular boss.

In yet another specific embodiment of the present invention, the mechanism side plate is further provided with an end surface, a first bending surface, and a second bending surface, the second insulating sheet is further provided with a first bending structure, a second bending structure, and a third bending structure along the height direction, the first bending structure on the second insulating sheet is assembled with the first bending surface on the mechanism side plate in a matching manner, the second bending structure is assembled with the second bending surface on the mechanism side plate in a matching manner, and the third bending structure is assembled with the end surface on the mechanism side plate in a matching manner.

In a further specific embodiment of the present invention, the accommodating cavity on the base is a rectangular slot, an L-shaped slot or a concave slot structure, and the first insulating sheet is a rectangular slot, an L-shaped slot or a concave structure.

Due to the adoption of the structure, the utility model has the beneficial effects that: through inside and setting up the insulating piece in operating device's both sides at the circuit breaker, the assembly clearance that operating device and both cooperations of base and upper cover department formed is separated with the insulating piece, through the mode that increases the insulating piece in the inside limited space of circuit breaker, improves the phase insulation of circuit breaker and to ground insulating properties, prevents simultaneously that operating device from receiving free gaseous pollution.

Drawings

Fig. 1 is a schematic structural diagram of a molded case circuit breaker according to the present invention.

Fig. 2 is a perspective view of a base of the molded case circuit breaker according to the present invention.

Fig. 3 is a side view of an upper cover of the molded case circuit breaker according to the present invention.

Fig. 4 is another side view of the upper cover of the molded case circuit breaker according to the present invention.

Fig. 5 is a perspective view of an operating mechanism of the molded case circuit breaker according to the present invention.

Fig. 6 is a schematic view of the assembly of the actuator of the present invention with a second insulating plate.

Fig. 7 is a perspective view of a first insulating plate of the molded case circuit breaker according to the present invention.

Fig. 8 is a perspective view of a second insulating plate of the molded case circuit breaker according to the present invention.

In the figure: 1. the base comprises a base 11, a base side wall 12, an accommodating cavity 13 and spaced ribs; 2. an operating mechanism 21, a mechanism side plate 211, a first circular boss 212, a second circular boss 213, a mounting surface 214, an end surface 215, a first bending surface 216 and a second bending surface; 3. a first insulating sheet; 4. the structure comprises a first insulating sheet, a second insulating sheet, a first round hole, a second round hole, a first bending structure, a second bending structure, a third bending structure, a first round hole, a second round hole, a first bending structure, a second bending structure, a third bending structure and a lower bottom, wherein the first round hole is 41; 5. upper cover, 51, upper cover spacer rib, 52, upper cover lateral wall.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made in the form of the present invention rather than the essential changes should be regarded as the protection scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position shown in fig. 1, and thus should not be construed as particularly limiting the technical solution provided by the present invention.

Referring to fig. 1 to 8, the present invention relates to a molded case circuit breaker, which may be a single-pole circuit breaker, a two-pole circuit breaker, a three-pole circuit breaker, or a four-pole circuit breaker, and the present embodiment takes the two-pole circuit breaker as an example, and includes a base 1, an operating mechanism 2, and an upper cover 5, the upper cover 5 and the base 1 are assembled together, and a cavity for installing the operating mechanism 2 is formed inside the two, and an assembly gap is formed at a matching position of the two, an insulating part is disposed at one side of the operating mechanism 2, which is close to a side wall 11 of the base, and/or close to a side of an adjacent spaced rib 13, and is disposed at an assembly gap formed by the assembly of the upper cover 5 and the base 1, that is, the insulating part may be disposed at a side close to the side wall 11 of the base, or at a side close to the spaced rib 13, the insulating part can be arranged on one side close to the side wall 11 of the base and one side close to the spaced ribs 13, in this embodiment, the insulating part is arranged on one side close to the side wall 11 of the base and one side close to the spaced ribs 13 adjacent to each other at the same time;

as shown in fig. 1 to 8, the insulating member described in the present embodiment includes a first insulating sheet 3 and a second insulating sheet 4, and the first insulating sheet 3 and the second insulating sheet 4 are respectively located on both sides of the operating mechanism 2.

As shown in fig. 2 to 4, the base 1 is provided with a lateral base sidewall 11 and an internal spacing rib 13. The upper cover 5 is provided with an upper cover spacing rib 51 which is matched and installed with the spacing rib 13 and an upper cover side wall 52 which is matched and assembled with the base side wall 11. When the base 1 is assembled with the upper cover 5, a side wall assembly gap is formed between the base side wall 11 and the upper cover side wall 52, a spacer rib assembly gap is formed between the base spacer rib 13 and the upper cover spacer rib 51, and the side wall assembly gap and the spacer rib assembly gap jointly form an assembly gap between the base 1 and the upper cover 5. The first insulating sheet 3 and the second insulating sheet 4 are mounted to separate the actuator 2 from the assembly gap formed between the base 1 and the upper cover 5.

As shown in fig. 1, 5 and 7, the side wall 11 of the base is provided with a receiving cavity 12, in this embodiment, the receiving cavity 12 has a rectangular groove-like structure, and correspondingly, the first insulating sheet 3 has a rectangular structure. The first insulating sheet 3 is installed in the accommodating cavity 12 of the base side wall 11, and is located at one side of the operating mechanism 2 close to the base side wall 11 and at an assembling gap formed by assembling the upper cover 5 and the base 1. The first insulating sheet 3 is limited by the end of the accommodating cavity 12 in the length direction, the upper edge of the first insulating sheet 3 is higher than the assembly gap between the base 1 and the upper cover 5, and the lower edge is lower than the assembly gap between the base 1 and the upper cover 5.

As shown in fig. 1, 2 and 7, the accommodating cavity 12 may also be an L-shaped slotted or recessed structure (not shown), and then the first insulating sheet 3 is correspondingly an L-shaped or recessed structure (not shown).

As shown in fig. 5, 6 and 8, the second insulation sheet 4 is mounted on the operating mechanism 2 on a side close to the spaced ribs 13 of the base 1 at a mounting gap formed by the mounting of the upper cover 5 and the base 1. Specifically, the operating mechanism 2 is provided with a mechanism side plate 21, and the mechanism side plate 21 is provided with a first circular boss 211, a second circular boss 212, an installation surface 213, an end surface 214, a first bending surface 215, and a second bending surface 216. The second insulation sheet 4 is provided with a first round hole 41 and a second round hole 42. The first circular hole 41 is concentrically fitted with the first circular boss 211, and the second circular hole 42 is concentrically fitted with the second circular boss 212. The second insulating sheet 4 is further provided with a first bending structure 43, a second bending structure 44 and a third bending structure 45 along the height direction. First bending surface 215 cooperation assembly that first bending structure 43 on the second insulating piece 4 and the mechanism curb plate 21 set up, second bending structure 44 and the cooperation assembly of the second bending surface 216 on the mechanism curb plate 21, third bending structure 45 and the terminal surface 214 cooperation assembly on the mechanism curb plate 21. The lower bottom 46 of the second insulation sheet 4 is attached to the mounting surface 213 of the mechanism side plate 21, the upper edge of the second insulation sheet 4 is higher than the assembly gap between the base 1 and the upper cover 5, and the lower edge is lower than the assembly gap between the base 1 and the upper cover 5. Second insulating piece 4 assembly accomplish the back, form the parcel to mechanism curb plate 21 on operating device 2, first insulating piece 3 and second insulating piece 4 are separated operating device 2 and base 1 and the assembly clearance that forms between the 5 two of upper cover, have improved operating device 2's insulating protective capacities.

When the circuit breaker is a single-pole circuit breaker (not shown in the figure), the first insulating sheet 3 is installed in the accommodating cavity 12 of the side wall 11 of the base, is positioned at the two sides of the operating mechanism 2 and is positioned at the assembly gap formed by the assembly of the upper cover 5 and the base 1, and separates the operating mechanism 2 from the assembly gap formed between the base 1 and the upper cover 5, so that the insulating protection capability of the operating mechanism 2 is improved. When for tripolar or quadrupole circuit breaker (not shown in the figure), operating device 2 installs B looks or C looks at the circuit breaker, is located both sides and holds the intracavity for separating muscle fit-up gap, second insulating piece 4 assemble respectively on operating device 2 and be located operating device 2's both sides, form the parcel to mechanism curb plate 21 on operating device 2, second insulating piece 4 separates operating device 2 and base 1 and the fit-up gap that upper cover 5 formed between the two, has improved operating device 2's insulating protective capacities.

The first insulating sheet 3 and the second insulating sheet 4 may be sheet-shaped insulating members made of insulating materials such as nylon, DMC and high temperature resistant flame retardant cardboard. The insulating member may be not only the first insulating sheet 3 and the second insulating sheet 4, but also other insulating sheets, as long as the first insulating sheet 3, the second insulating sheet 4 or other insulating sheets are located at one side of the operating mechanism 2 to separate the assembly gap formed by the operating mechanism 2 and the base 1 and the upper cover 5, which falls within the protection scope of the present invention.

Claims

1. The utility model provides a moulded case circuit breaker, includes base (1), operating device (2) and upper cover (5), upper cover (5) and base (1) assembly back both inside formation be used for installing operating device (2) hold the chamber, operating device (2) are installed and are closed separating brake operation, its characterized in that to the circuit breaker in holding the intracavity: the insulating part is arranged in the containing cavity for mounting the operating mechanism (2), is positioned on one side or two sides of the operating mechanism (2) and is positioned at an assembly gap formed at the matching part of the base (1) and the upper cover (5), and separates the operating mechanism (2) from the assembly gap.

2. The molded case circuit breaker according to claim 1, wherein the base (1) is provided with a base side wall (11) located at a side surface and spaced ribs (13) located inside, the upper cover (5) is provided with an upper cover spacer rib (51) installed in cooperation with the spaced ribs (13) and an upper cover side wall (52) assembled in cooperation with the base side wall (11), when the base (1) is assembled with the upper cover (5), a side wall assembly gap is formed between the base side wall (11) and the upper cover side wall (52), and a spacer rib assembly gap is formed between the base spacer rib (13) and the upper cover spacer rib (51).

3. The molded case circuit breaker according to claim 2, wherein the insulating member comprises a first insulating sheet (3), the base sidewall (11) is provided with a receiving cavity (12), the first insulating sheet (3) is installed in the receiving cavity (12) of the base sidewall (11), and is located at a side of the operating mechanism (2) close to the base sidewall (11) and at an assembling gap formed by assembling the upper cover (5) and the base (1), an upper edge of the first insulating sheet (3) is higher than the assembling gap between the base (1) and the upper cover (5), and a lower edge of the first insulating sheet is lower than the assembling gap between the base (1) and the upper cover (5).

4. The molded case circuit breaker according to claim 2, wherein the insulating member comprises a first insulating sheet (3), the base sidewall (11) is provided with a receiving cavity (12), the first insulating sheet (3) is installed in the receiving cavity (12) of the base sidewall (11) and located at both sides of the operating mechanism (2) and at an assembling gap formed by assembling the upper cover (5) and the base (1), an upper edge of the first insulating sheet (3) is higher than the assembling gap between the base (1) and the upper cover (5), and a lower edge of the first insulating sheet is lower than the assembling gap between the base (1) and the upper cover (5).

5. A molded case circuit breaker according to claim 2, wherein said insulating member comprises a second insulating sheet (4), said second insulating sheet (4) is installed on one side of said operating mechanism (2) close to said spaced ribs (13) of said base (1) and located at an assembling gap formed by assembling said upper cover (5) with said base (1), and an upper edge of said second insulating sheet (4) is higher than said assembling gap between said base (1) and said upper cover (5) and a lower edge of said second insulating sheet is lower than said assembling gap between said base (1) and said upper cover (5).

6. A molded case circuit breaker according to claim 2, wherein said insulating member comprises a second insulating sheet (4), the second insulating sheet (4) is installed on both sides of the operating mechanism (2) and located at an assembling gap formed by assembling the upper cover (5) with the base (1), and an upper edge of the second insulating sheet (4) is higher than the assembling gap between the base (1) and the upper cover (5) and a lower edge is lower than the assembling gap between the base (1) and the upper cover (5).

7. The molded case circuit breaker according to claim 2, wherein the insulating member comprises a first insulating sheet (3) and a second insulating sheet (4), the base sidewall (11) is provided with a receiving cavity (12), the first insulating sheet (3) is installed in the receiving cavity (12) of the base sidewall (11), and is located at a side of the operating mechanism (2) close to the base sidewall (11) and at an assembling gap formed by assembling the upper cover (5) and the base (1), an upper edge of the first insulating sheet (3) is higher than the assembling gap between the base (1) and the upper cover (5), a lower edge of the first insulating sheet is lower than the assembling gap between the base (1) and the upper cover (5), the second insulating sheet (4) is installed at a side of the operating mechanism (2) close to the spaced ribs (13) of the base (1) and is located at the assembling gap formed by assembling the upper cover (5) and the base (1), and the upper edge of the second insulating sheet (4) is higher than the assembly gap between the base (1) and the upper cover (5), and the lower edge is lower than the assembly gap between the base (1) and the upper cover (5).

8. The molded case circuit breaker according to claim 5, 6 or 7, wherein the operating mechanism (2) further comprises a mechanism side plate (21), the mechanism side plate (21) comprises a first circular boss (211) and a second circular boss (212), the second insulating sheet (4) comprises a first circular hole (41) formed in cooperation with the first circular boss (211) and a second circular hole (42) formed in cooperation with the second circular boss (212), the first circular hole (41) is concentric with the first circular boss (211), the second circular hole (42) is concentric with the second circular boss (212), and the second insulating sheet (4) is mounted on the mechanism side plate (21) through the first circular boss (211) and the second circular boss (212).

9. The molded case circuit breaker according to claim 8, wherein the mechanism side plate (21) is further provided with a terminal surface (214), a first bending surface (215), and a second bending surface (216), the second insulating sheet (4) is further provided with a first bending structure (43), a second bending structure (44), and a third bending structure (45) along a height direction, the first bending structure (43) on the second insulating sheet (4) is assembled with the first bending surface (215) on the mechanism side plate (21) in a matching manner, the second bending structure (44) is assembled with the second bending surface (216) on the mechanism side plate (21) in a matching manner, and the third bending structure (45) is assembled with the terminal surface (214) on the mechanism side plate (21) in a matching manner.

10. A molded case circuit breaker according to claim 3, 4 or 7, wherein the receiving cavity (12) of the base (1) is a rectangular slot, an L-shaped slot or a concave slot structure, and the first insulating sheet (3) is a rectangular slot, an L-shaped slot or a concave structure.