CN217306430U

CN217306430U - Arc extinguish chamber and molded case circuit breaker with same

Info

Publication number: CN217306430U
Application number: CN202221179446.1U
Authority: CN
Inventors: 吴磊; 周建平; 张洪荣; 高柏勇
Original assignee: Gret Electric Co ltd
Current assignee: Gret Electric Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-08-26
Anticipated expiration: 2032-05-17

Abstract

An arc extinguish chamber and a molded case circuit breaker with the arc extinguish chamber. The problem of current explosion chamber assembly trouble is solved. It includes the casing, the casing in be equipped with operating device and explosion chamber, the explosion chamber include the arc extinguishing support, the arc extinguishing support on be equipped with the multi-disc arc extinguishing fence piece, be equipped with the interval and mutually support and form the arc extinguishing space between the different arc extinguishing fence pieces, the arc extinguishing fence piece include installation foot and arc extinguishing piece, the arc extinguishing piece locate between two installation feet, the arc extinguishing space in be equipped with the product gas cover, the product gas cover be fixed in on the arc extinguishing support, product gas cover, arc extinguishing fence piece, arc extinguishing support form the integral type structure. The beneficial effects of the utility model are that, with product gas cover, arc extinguishing fence piece, arc extinguishing support formation integral type structure, the assembly has been simplified in the modularization installation of being convenient for, simple structure, easy dismounting, the maintenance of being convenient for.

Description

Arc extinguish chamber and molded case circuit breaker with same

Technical Field

The utility model relates to a moulded case circuit breaker, concretely relates to explosion chamber and be equipped with moulded case circuit breaker of this explosion chamber.

Background

The molded case circuit breaker is also called a device type circuit breaker, all parts are sealed in a plastic shell, and an auxiliary contact, an undervoltage release, a shunt release and the like are modularized. The molded case circuit breaker generally includes a contact system, an arc extinguishing system, an operating mechanism, a trip mechanism, an overload protection system, a short circuit protection system, and the like. The arc extinguishing system of the existing molded case circuit breaker generally comprises a plurality of arc extinguishing fence pieces, and a gas generating cover is generally arranged for increasing the arc extinguishing efficiency, but the existing arc extinguishing fence pieces and the gas generating cover are generally arranged relatively independently, and the gas generating cover can also adopt a split type structure, so that the product parts are increased, and each part is required to be independently assembled during assembly, and the assembly is troublesome.

SUMMERY OF THE UTILITY MODEL

For solving the trouble problem of current explosion chamber assembly among the background art, the utility model provides an explosion chamber and be equipped with the moulded case circuit breaker of this explosion chamber.

The technical scheme of the utility model is that: the utility model provides an arc extinguishing chamber, includes the arc extinguishing support, the arc extinguishing support on be equipped with the multi-disc arc extinguishing fence piece, be equipped with the interval and mutually support between the different arc extinguishing fence pieces and form the arc extinguishing space, the arc extinguishing fence piece including installation foot and arc extinguishing piece, the arc extinguishing piece locate between two installation feet, the arc extinguishing space in be equipped with and produce the gas cover, produce on the gas cover is fixed in the arc extinguishing support, gas cover, arc extinguishing fence piece, arc extinguishing support form the integral type structure.

As a further improvement, the gas generating cover comprises a first baffle and a second baffle, the first baffle forms a first space, the second baffle forms a second space, and the volume of the first space is larger than that of the second space.

As a further improvement, the first baffle have two, the second baffle have two, interval between two first baffles is greater than the interval between two second baffles, first baffle be close to the setting of arc extinguishing piece.

As a further improvement of the utility model, first baffle be connected with the second baffle through keeping off the shoulder, first baffle with keep off shoulder, second baffle and keep off the shoulder and all set up perpendicularly.

As a further improvement, the bottom of the gas production cover is provided with a connecting plate, and the connecting plate is provided with a through hole convenient for the contact of a moving contact and a static contact.

As a further improvement, the gas production cover on be equipped with the third baffle, the third baffle locate the rear of arc extinguishing fence piece.

As the utility model discloses a further improvement, the third baffle to arc extinguishing fence piece direction salient lug, gas production cover be equipped with the card foot of arc extinguishing support looks adaptation.

As a further improvement of the utility model, the arc extinguishing piece on protruding and recess, protruding and recess alternate setting.

As the utility model discloses a further improvement, arc extinguishing fence piece have the multi-disc, the thickness of locating arc extinguishing support bottom arc extinguishing fence piece is greater than the thickness of keeping away from arc extinguishing support bottom arc extinguishing fence piece, multi-disc arc extinguishing fence piece is the arc setting.

A molded case circuit breaker comprises a shell, wherein an operating mechanism and the arc extinguish chamber are arranged in the shell.

The beneficial effects of the utility model are that, with product gas cover, arc extinguishing fence piece, arc extinguishing support formation integral type structure, the assembly has been simplified in the modularization installation of being convenient for, simple structure, easy dismounting, the maintenance of being convenient for.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the arc-extinguishing chamber shown in fig. 1.

Fig. 3 is a schematic view of the structure in the other direction of fig. 2.

Fig. 4 is a schematic diagram of the exploded structure of fig. 2.

FIG. 5 is a schematic view of the arc extinguishing gate sheet structure shown in FIG. 4.

In the figure, 1, an arc extinguishing support; 2. an arc extinguishing grid sheet; 21. an arc extinguishing space; 22. mounting a foot; 23. an arc extinguishing sheet; 231. a protrusion; 232. a groove; 3. a gas generating cover; 31. a first baffle plate; 32. a second baffle; 33. a first space; 34. a second space; 35. a shoulder block; 36. a connecting plate; 37. a through hole; 38. a third baffle plate; 39. a bump; 40. clamping a pin; 5. a housing; 6. an operating mechanism; 7. an arc extinguishing chamber.

Detailed Description

The embodiments of the present invention will be further explained with reference to the accompanying drawings:

shown by fig. 1 with fig. 2-5, a moulded case circuit breaker, including casing 5, casing 5 in be equipped with operating device 6 and adopt explosion chamber 7, explosion chamber 7 including arc extinguishing support 1, arc extinguishing support 1 on be equipped with multi-disc arc extinguishing fence piece 2, be equipped with the interval and mutually support between the different arc extinguishing fence pieces 2 and form arc extinguishing space 21, arc extinguishing fence piece 2 including installation foot 22 and arc extinguishing piece 23, arc extinguishing piece 23 locate between two installation feet 22, arc extinguishing space 21 in be equipped with and produce gas cover 3, produce gas cover 3 and be fixed in on arc extinguishing support 1, produce gas cover 3, arc extinguishing fence piece 2, arc extinguishing support 1 and form the integral type structure. The beneficial effects of the utility model are that, to produce gas cover, arc extinguishing gate wafer, arc extinguishing support and form the integral type structure, the assembly has been simplified in the modularization installation of being convenient for, simple structure, easy dismounting, the maintenance of being convenient for.

The gas production hood comprises a first baffle 31 and a second baffle 32, a first space 33 is formed at the first baffle 31, a second space 34 is formed at the second baffle 32, and the volume of the first space 33 is larger than that of the second space 34. Specifically, the moving contact penetrates through the second space and is in contact with the fixed contact at the first space, when the moving contact and the fixed contact are disconnected, the second baffle is narrow, and the electric arc is not easy to flow back. And the second baffle is narrower, and the space change of the first baffle and the second baffle causes the two to generate pressure difference, thereby being convenient for arc extinction.

The number of the first baffle plates 31 is two, the number of the second baffle plates 32 is two, the distance between the two first baffle plates 31 is larger than the distance between the two second baffle plates 32, and the first baffle plates 31 are arranged close to the arc extinguishing sheet 23. Specifically, the first baffle 31 is connected with the second baffle 32 through a retaining shoulder 35, and the first baffle 31 and the retaining shoulder 35, and the second baffle 32 and the retaining shoulder 35 are all vertically arranged. Therefore, the arrangement of the blocking shoulder can avoid the arc backflow in the first space from influencing other parts. Meanwhile, the gas generating cover is convenient for generating gas, and arc striking and arc extinguishing are convenient.

The bottom of the gas generating cover 3 is provided with a connecting plate 36, and the connecting plate 36 is provided with a through hole 37 which is convenient for the contact of a moving contact and a static contact. The arrangement of the connecting plate does not influence the installation and the use of the gas generating cover, the gas generating cover can be made to be of an integrated structure at the same time, the integrated assembly is facilitated, the connecting plate can be placed at the static contact piece, and the through hole corresponds to the static contact piece and the moving contact.

The gas production cover 3 is provided with a third baffle 38, and the third baffle 38 is arranged behind the arc extinguishing fence sheet 2. The third baffle plate is arranged to prevent the arc just generated from directly passing between the two arc extinguishing gate pieces to affect the parts. Specifically, the third baffle 38 protrudes from the bump 39 toward the arc extinguishing gate sheet 2, and the gas production cover 3 is provided with a clip 40 adapted to the arc extinguishing support 1. The structure is convenient for blocking arc and simultaneously is convenient for mounting and fixing the gas generating cover, and more specifically, the arc extinguishing bracket is provided with a notch convenient for mounting a clamping pin.

The arc-extinguishing piece 23 is provided with protrusions 231 and grooves 232, and the protrusions 231 and the grooves 232 are arranged at intervals. Specifically, the arc extinguishing fence pieces 2 are provided with a plurality of pieces, the thickness of the arc extinguishing fence pieces 2 arranged at the bottom of the arc extinguishing support 1 is larger than that of the arc extinguishing fence pieces 2 far away from the bottom of the arc extinguishing support 1, and the arc extinguishing fence pieces 2 are arranged in an arc shape. The structure is convenient for arc extinction, the arc extinction effect of the product is better, meanwhile, arc extinction gate wafers with different thicknesses reduce materials and production cost in consideration of the actual requirements of arc extinction. More specifically, the clamping blocks on the arc extinguishing fence piece mounting foot can be arranged in the same or different numbers.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.

Claims

1. The arc extinguishing chamber comprises an arc extinguishing support (1) and is characterized in that a plurality of arc extinguishing fence pieces (2) are arranged on the arc extinguishing support (1), spaces are arranged between different arc extinguishing fence pieces (2) and are matched with each other to form an arc extinguishing space (21), each arc extinguishing fence piece (2) comprises an installation foot (22) and an arc extinguishing piece (23), each arc extinguishing piece (23) is arranged between the two installation feet (22), a gas production cover (3) is arranged in the arc extinguishing space (21), the gas production cover (3) is fixed on the arc extinguishing support (1), and the gas production cover (3), the arc extinguishing fence pieces (2) and the arc extinguishing support (1) form an integrated structure.

2. The arc chute according to claim 1, characterized in that said gas generating hood comprises a first baffle (31) and a second baffle (32), said first baffle (31) forms a first space (33), said second baffle (32) forms a second space (34), said first space (33) has a larger volume than said second space (34).

3. Arc chute according to claim 2, characterized in that there are two first baffles (31) and two second baffles (32), the distance between the two first baffles (31) being greater than the distance between the two second baffles (32), the first baffles (31) being arranged close to the extinguishing plates (23).

4. Arc chute according to claim 3, characterized in that said first baffle (31) is connected to said second baffle (32) by means of a stop shoulder (35), said first baffle (31) and said stop shoulder (35), said second baffle (32) and said stop shoulder (35) being arranged vertically.

5. An arc extinguish chamber according to claim 2, characterized in that a connecting plate (36) is arranged at the bottom of the gas generating cover (3), and a through hole (37) convenient for a moving contact and a fixed contact to contact is arranged on the connecting plate (36).

6. The arc extinguishing chamber according to claim 1, characterized in that a third baffle (38) is arranged on the gas generating cover (3), and the third baffle (38) is arranged behind the arc extinguishing gate sheet (2).

7. The arc extinguish chamber according to claim 6, characterized in that the third baffle (38) protrudes a bump (39) towards the arc extinguish gate sheet (2), and the gas generating cover (3) is provided with a clamping pin (40) matched with the arc extinguish bracket (1).

8. An arc chute according to claim 1, characterized in that said arc extinguishing plate (23) has protrusions (231) and recesses (232), said protrusions (231) and recesses (232) being arranged alternately.

9. An arc extinguish chamber according to claim 1, characterized in that the arc extinguish gate sheet (2) has a plurality of pieces, the thickness of the arc extinguish gate sheet (2) arranged at the bottom of the arc extinguish bracket (1) is larger than the thickness of the arc extinguish gate sheet (2) far away from the bottom of the arc extinguish bracket (1), and the arc extinguish gate sheets (2) are arranged in an arc shape.

10. A molded case circuit breaker, characterized in that: comprising a housing (5), wherein an operating mechanism (6) and an arc extinguishing chamber according to any one of claims 1-9 are arranged in the housing (5).