Arc extinguishing chamber of molded case circuit breaker

Abstract

The utility model provides a molded case circuit breaker arc extinguishing chamber, which comprises two partition plates arranged in a mirror image manner and a plurality of arc extinguishing grid sheets arranged between the two partition plates in parallel and at equal intervals, two sides of each arc extinguishing grid sheet are provided with plug boards, the surfaces of the partition plates are provided with a plurality of jacks matched with the plug boards, the tops of the plug boards are provided with fixing clamping grooves, and the fixing clamping grooves are connected with the plug boards. Fixing seats are arranged at the positions, located at the tops of the inserting holes, of the outer sides of the partition plates, through grooves are formed in the bottoms of the fixing seats, windows are formed in one sides of the fixing seats, fixing clamping plates are movably arranged in the fixing seats, the fixing clamping plates can penetrate through the through grooves and are clamped and embedded into the fixing clamping grooves, and a plurality of elastic parts are arranged at the tops of the fixing clamping plates. According to the utility model, the fixed clamping plates are clamped and embedded into the fixed clamping grooves through the insertion plate insertion holes, so that the plurality of arc extinguishing grid sheets and the partition plates can be assembled and fixed. Therefore, compared with a traditional hot riveting process, the assembling mode is simple, and the production efficiency can be effectively improved. And the arc extinguishing grid sheets and the partition plates are convenient to disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of arc extinguishing covers, and particularly relates to an arc extinguishing cover for a molded case circuit breaker. Background Technique

[0002] The arc extinguishing cover of a molded case circuit breaker is an important component used to suppress the generation of electric arcs during the operation of the circuit breaker. An electric arc is generated when current passes through air and has a very high temperature sufficient to melt most metals. When the circuit breaker disconnects the circuit, an electric arc may be generated, which not only damages the internal structure of the circuit breaker but may also cause safety accidents. Therefore, the role of the arc extinguishing cover is to quickly cool and extinguish the electric arc to protect the safety of the circuit breaker and surrounding equipment.

[0003] When the arc extinguishing grids and partitions in the existing arc extinguishing covers are installed, hot riveting technology is usually required for assembly and fixation, which has too high requirements for process technology, resulting in low installation efficiency and thus low production efficiency; and it is not convenient for later disassembly, repair or replacement between the arc extinguishing grids and partitions. Content of the Utility Model

[0004] The utility model aims to provide an arc extinguishing cover for a molded case circuit breaker to solve the problems raised in the above background technique.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] An arc extinguishing cover for a molded case circuit breaker includes two mirror-image partitions, and a plurality of arc extinguishing grids arranged in parallel and at equal intervals between the two partitions. Plug plates are provided on both sides of the arc extinguishing grids. A plurality of jacks for cooperating with the plug plates are provided on the surfaces of the partitions. Fixed card slots are provided at the tops of the plug plates. Fixed seats are provided at the tops of the jacks on the outer sides of the partitions. Through grooves are provided at the bottoms of the fixed seats. Windows are provided on one side of the fixed seats. Fixed clamping plates are movably provided in the fixed seats. The fixed clamping plates can pass through the through grooves and be clamped into the fixed card slots. A plurality of elastic members are provided at the tops of the fixed clamping plates.

[0007] Preferably, a push plate extends out of the window on one side of the fixed clamping plate.

[0008] Preferably, the elastic member is made of a semi-circular metal spring piece.

[0009] Preferably, the middle of the elastic member is connected to the top of the fixed clamping plate, and both ends of the elastic member are abutted against the inner top wall of the fixed seat.

[0010] Advantageous Effects

[0011] One or more of the above technical solutions in the arc extinguishing cover for a molded case circuit breaker provided by the embodiments of the utility model at least have the following technical effects:

[0012] With the above technical solution of the present utility model, during assembly, by inserting the insertion plates on the sides of several arc extinguishing grid plates into the jacks on the partition board respectively, and by snapping the fixing clamping plate into the fixing clamping groove, the assembly and fixation between several arc extinguishing grid plates and the partition board can be achieved. Therefore, compared with the traditional hot riveting process, the assembly method is relatively simple, which can effectively improve the production efficiency. During disassembly, by pushing the push plate upwards to pull out the fixing clamping plate from the fixing clamping groove, the separation between the arc extinguishing grid plate and the partition board can be achieved, which is convenient for disassembling the arc extinguishing grid plate and the partition board, and is also convenient for later disassembly, repair or replacement of the arc extinguishing grid plate and the partition board. Description of the Drawings

[0013] Figure 1 It is a schematic three-dimensional structure diagram of the whole of the present utility model;

[0014] Figure 2 It is a schematic structure diagram of the partition board of the present utility model;

[0015] Figure 3 It is a schematic structure diagram of the arc extinguishing grid plate of the present utility model;

[0016] The corresponding relationship between the reference numerals and the component names in the drawings is as follows:

[0017] 1. Partition board; 2. Arc extinguishing grid plate; 3. Insertion plate; 4. Jack; 5. Fixing clamping groove; 6. Fixing seat; 7. Through groove; 8. Window; 9. Fixing clamping plate; 10. Elastic member; 11. Push plate. Detailed Embodiment

[0018] Next, the technical solution of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 a limitation of the present utility model.

[0020] In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] As Figures 1-3 shown, it is a schematic structural view of an arc extinguishing cover of a plastic case circuit breaker according to a preferred embodiment of the present utility model;

[0022] In this embodiment, it includes two partitions 1 arranged in mirror symmetry. The two partitions 1 have the same structure, and a plurality of arc extinguishing grid plates 2 arranged in parallel and at equal intervals between the two partitions 1. Both sides of the arc extinguishing grid plates 2 are integrally provided with two insertion plates 3. The surfaces of the partitions 3 are all provided with a plurality of insertion holes 4 for cooperating with the insertion plates 3. The tops of the insertion plates 3 are all provided with fixed card slots 5. The outer sides of the partitions 1 are integrally provided with fixed seats 6 at the tops of the insertion holes 4. Through grooves 7 are provided at the bottoms of the fixed seats 6. Windows 8 are provided on one side of the fixed seats 6. Fixed clamping plates 9 are movably arranged in the fixed seats 6. The fixed clamping plates 9 can pass through the through grooves 7 and be clamped into the fixed card slots 5. A plurality of elastic members 10 are provided at the tops of the fixed clamping plates 9. During assembly, by respectively inserting the insertion plates 3 on the sides of the plurality of arc extinguishing grid plates 2 into the insertion holes 4 on the partitions 1, and by clamping the fixed clamping plates 9 into the fixed card slots 5, the plurality of arc extinguishing grid plates 2 can be assembled and fixed to the partitions 1.

[0023] In this embodiment, a push plate 11 extends from one side of the fixed clamping plate 9 out of the window 8. By pushing the push plate 11 to move the fixed clamping plate 9, it is convenient to pull out the fixed clamping plate 9 from the fixed card slot 5 to complete the disassembly and separation between the arc extinguishing grid plates 2 and the partitions 1.

[0024] In this embodiment, the elastic member 10 is made of a semi-circular metal spring sheet. Using a semi-circular metal spring sheet can not only play a corresponding elastic role but also occupy less space.

[0025] In this embodiment, the middle part of the elastic member 10 is connected to the top of the fixed clamping plate 9, and the two ends of the elastic member 10 are abutted against the inner top wall of the fixed seat 6. The elastic member 10 provides an elastic force for the fixed clamping plate 9 to provide the holding force required for the fixed clamping plate 9 to remain clamped in the fixed card slot 5.

[0026] An arc extinguishing cover of a plastic case circuit breaker of the present utility model can be implemented as long as its installation method, connection method or setting method is a common mechanical method and can achieve its beneficial effects.

[0027] The technologies not described in detail in the present utility model are all well-known technologies. Those skilled in the art can easily implement the present utility model on the basis of understanding this specification, and the content shown in the drawings is a part of this specification.

[0028] The above content further elaborates on the present utility model in combination with specific implementation manners. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, which should all be regarded as falling within the protection scope determined by the claims submitted for the present utility model.

Claims

1. An arc extinguishing cover for a molded case circuit breaker, comprising two partitions (1) arranged in mirror image, and a plurality of arc extinguishing grids (2) arranged in parallel and at equal intervals between the two partitions (1), characterized in that: Both sides of the arc extinguishing grid (2) are provided with plug plates (3), the surface of the partition (1) is provided with a plurality of plug holes (4) used in conjunction with the plug plates (3), the top of the plug plates (3) is provided with a fixed card slot (5), the outer side of the partition (1) is provided with a fixed seat (6) located at the top of the plug hole (4), the bottom of the fixed seat (6) is provided with a through slot (7), one side of the fixed seat (6) is provided with a window (8), a fixed card plate (9) is movably provided in the fixed seat (6), the fixed card plate (9) can pass through the through slot (7) and be inserted into the fixed card slot (5), and a plurality of elastic members (10) are provided on the top of the fixed card plate (9).

2. The arc extinguishing cover of a molded case circuit breaker according to claim 1, characterized in that: A push plate (11) is provided on one side of the fixed clamping plate (9) extending out of the window (8).

3. The arc extinguishing cover of a molded case circuit breaker according to claim 1, characterized in that: The elastic member (10) is made of a semi-arc-shaped metal spring sheet.

4. The arc extinguishing cover of a molded case circuit breaker according to claim 1, characterized in that: The middle portion of the elastic member (10) is connected to the top of the fixed clamping plate (9), and the two ends of the elastic member (10) are in contact with the inner top wall of the fixed seat (6).

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