Gas production cover and circuit breaker shell

Abstract

A gas production cover and a circuit breaker housing are sleeved on the top end of the left side headquarter or the right side headquarter of a U-shaped magnetism increasing sheet and form a magnetic blow-out structure with the U-shaped magnetism increasing sheet, and the gas production cover and the circuit breaker housing comprise a sleeving part which is provided with a cavity, and one side of the sleeving part is provided with an opening communicated with the cavity; and the matching part is formed by extending the sleeving part towards the direction of the adjacent circuit breaker shell, and the matching part can be embedded in the outer wall of the circuit breaker shell. The sleeving part is used for covering the magnetism increasing sheet, the matching part is matched with the circuit breaker shell to limit the gas production cover in the axial direction, the gas production cover is fixed in all directions, it can be guaranteed that the gas production cover does not fall off in the high-temperature and vibration environment, safety is improved, meanwhile, embedded matching is adopted, and therefore the reliability of the gas production cover is improved. The assembly and disassembly are very convenient and fast, and the gas production cover cannot be damaged.

Description

Technical Field

[0001] The utility model specifically relates to a gas generating hood and a circuit breaker housing. Background Art

[0002] In low-voltage power distribution systems, circuit breakers are an important device for protecting power supply safety. Double-breakpoint circuit breakers are widely used due to their advantages of fast arc absorption, fast current limiting and strong breaking capacity.

[0003] In order to increase the arc extinguishing effect, a double-contact molded case circuit breaker disclosed in Chinese patent CN209374377U will be provided with a plurality of stacked magnetizing sheets at the stationary contact, and a gas generating cover will generally be set on the magnetizing sheet. For this type of magnetizing sheet, another magnetizing sheet will be set on the left and right sides of the stationary contact, and the fixing method of the gas generating cover is as follows: Figure 1 As shown in the figure, 1 represents a static contact, 2 represents a magnetizing sheet, 3 represents an insulating member, and 4 represents a moving contact. The insulating member is used to isolate the magnetizing sheet from the moving contact, but it is vertically arranged with the insulating member. Therefore, it is necessary to use a card-type connection method to connect the insulating member to the circuit breaker housing to fix the insulating member. In order to prevent it from falling off, the step of gluing will also be increased, which is time-consuming, labor-intensive, and difficult to install.

[0004] At the same time, the card-type connection method may fall off due to high temperature and vibration conditions. The insulating parts that fall off are easy to get stuck on the moving contacts, causing the circuit breaker to fail and reducing the working reliability of the circuit breaker. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a gas generating hood and a circuit breaker housing.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A gas generating hood is sleeved on the top of the left main part or the right main part of a U-shaped magnetizing sheet and forms a magnetic blowing structure with the U-shaped magnetizing sheet, comprising:

[0008] A sleeve portion having a cavity, and one side of the sleeve portion having an opening communicating with the cavity;

[0009] The matching portion is formed by extending the sleeve portion toward the adjacent circuit breaker housing, and the matching portion can be embedded in the outer wall of the circuit breaker housing.

[0010] The periphery of the sleeve portion is provided with an edge for fitting with the inner surface of the outer wall of the circuit breaker housing.

[0011] A transition surface is provided at the connection between the edge and the sleeve portion.

[0012] The matching portion is provided with an inclined surface in the circumferential direction.

[0013] The area of ​​the matching portion is smaller than the area of ​​the sleeve portion.

[0014] A circuit breaker housing adapted to any one of the above-mentioned gas generating hoods, comprising two groups of the following structures:

[0015] The matching groove is integrally formed on the inner surface of the outer wall of the circuit breaker housing, and one side of the matching groove is provided with an entry opening for the sleeve portion to enter, and can limit the movement of the sleeve portion placed therein along the axial direction of the circuit breaker housing;

[0016] The limiting groove is integrally formed in the matching groove, and is used to form a limiting match with the matching part, and can limit the movement of the sleeve part placed in the matching groove along the axis direction of the gas generating hood.

[0017] The entrance openings of the two matching grooves are arranged in opposite directions.

[0018] The circumference of the matching groove is provided with an inclined surface.

[0019] The beneficial effects of the utility model are as follows: the magnetizing sheet is covered by the sleeve portion, and the matching portion is used to cooperate with the circuit breaker housing to limit the axial direction of the gas generating hood, thereby achieving all-round fixation of the gas generating hood, which can ensure that the gas generating hood will not fall off in a high temperature and vibration environment, thereby improving safety; at the same time, the embedded matching is adopted, which is very convenient during assembly and disassembly, and will not cause damage to the gas generating hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the prior art.

[0021] Figure 2 It is a schematic diagram of the cooperation between the gas generating hood and the circuit breaker housing of the utility model.

[0022] Figure 3 for Figure 2 Schematic diagram of the cross section at AA in the middle.

[0023] Figure 4 It is a schematic structural diagram of the gas generating hood and the magnetizing sheet of the utility model.

[0024] Figure 5 This is a schematic diagram of the structure of the gas generating hood.

[0025] Figure 6 It is a structural schematic diagram of the circuit breaker housing of the utility model. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] like Figure 2 As shown, arrow B refers to the axial direction of the gas generating hood, and arrow C refers to the axial direction of the circuit breaker housing. Figure 3 The figure shows the cooperation between the magnetic blowing structure and the circuit breaker housing, that is, the cooperation part of the gas generating hood is embedded in the limiting groove of the circuit breaker housing, and the limiting groove can be a through type or a non-through type.

[0029] A gas generating hood is sleeved on the top of the left or right main head of a U-shaped magnetizing sheet, and forms a magnetic blowing structure with the U-shaped magnetizing sheet 30. Multiple U-shaped magnetizing sheets are stacked to form a magnetizing portion. The gas generating hood covers the parts on both sides of the magnetizing portion, namely the left main head 301 and the right main head 302. Figure 4 as shown in .

[0030] like Figure 5 As shown, the gas generating hood 20 comprises:

[0031] The sleeve part 201 has a cavity, and one side of the sleeve part has an opening connected to the cavity, and the cavity is arranged along the vertical direction of the U-shaped magnetizing sheet, so that the vertical part of the U-shaped magnetizing sheet can be covered, and the U-shaped magnetizing sheet is partially placed in the cavity, which plays a role in limiting the gas generating cover;

[0032] The mating portion 202 is formed by extending the sleeve portion toward the adjacent circuit breaker housing, and the mating portion can be embedded in the outer wall of the circuit breaker housing. The contact surfaces of the mating portion and the sleeve portion are not arranged on the same horizontal plane. The mating portion is slightly higher and is more suitable for forming an embedded limit fit with the circuit breaker housing.

[0033] The periphery of the sleeve portion is provided with an edge 203 for fitting with the inner surface of the outer wall of the circuit breaker housing. The edge is formed by the sleeve portion extending outward in the circumferential direction. Its thickness is less than that of the sleeve portion, and its extension length is preferably enough to seal the gap between the sleeve portion and the matching groove on the circuit breaker housing, thereby improving the air tightness.

[0034] A transition surface is provided at the connection between the edge and the sleeve portion, and the transition surface is matched with the inclined surface of the matching groove of the circuit breaker housing to reduce the difficulty of matching.

[0035] The matching portion is provided with an inclined surface in the circumferential direction, so that it can be inserted into the limiting groove more smoothly, thereby improving the assembly efficiency.

[0036] The area of ​​the matching portion is smaller than that of the sleeve portion, which reduces the cost and also ensures that the limiting position between the matching portion and the circuit breaker housing is more secure.

[0037] A plurality of grooves 204 are arranged along the axial direction of the sleeve portion where the sleeve portion contacts the U-shaped magnetizing sheet, so as to reduce the thickness of the sleeve portion and avoid deformation during processing.

[0038] A circuit breaker housing 10 adapted to any one of the above-mentioned gas generating hoods, the circuit breaker housing is suitable for a double-breakpoint circuit breaker, and thus comprises two groups of the following structures:

[0039] The matching groove 101 is integrally formed on the inner surface of the outer wall of the circuit breaker housing, and one side of the matching groove is provided with an entry opening for the sleeve portion to enter, and can limit the movement of the sleeve portion placed therein along the axial direction of the circuit breaker housing;

[0040] The limiting groove 102 is integrally formed in the matching groove, and is used to form a limiting match with the matching portion, and can limit the movement of the sleeve portion placed in the matching groove along the axial direction of the gas generating hood.

[0041] The gas generating hood is limited in the lateral direction by the matching groove, and the limitation in the axial direction is realized by the matching groove and the matching part, so as to fix the position of the gas generating hood. It can effectively prevent the gas generating hood from moving and falling off in a high temperature and vibration environment, thereby improving the reliability of the circuit breaker.

[0042] The entrances of the two matching grooves are arranged in opposite directions according to the movable contact arrangement of the double-breakpoint circuit breaker.

[0043] The matching groove is provided with an inclined surface in the circumference thereof, so as to facilitate the gas generating hood to enter the matching groove and reduce the difficulty of installation.

[0044] The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A gas generating hood, characterized in that: It is sleeved on the top of the left or right main head of the U-shaped magnetizing sheet and forms a magnetic blowing structure with the U-shaped magnetizing sheet, which includes: A sleeve portion having a cavity, and one side of the sleeve portion having an opening communicating with the cavity; The matching portion is formed by extending the sleeve portion toward the adjacent circuit breaker housing, and the matching portion can be embedded in the outer wall of the circuit breaker housing.

2. The gas generating hood according to claim 1, characterized in that: The periphery of the sleeve portion is provided with an edge for fitting with the inner surface of the outer wall of the circuit breaker housing.

3. The gas generating hood according to claim 2, characterized in that: A transition surface is provided at the connection between the edge and the sleeve portion.

4. The gas generating hood according to claim 1, characterized in that: The matching portion is provided with an inclined surface in the circumferential direction.

5. The gas generating hood according to claim 1, characterized in that: The area of ​​the matching portion is smaller than the area of ​​the sleeve portion.

6. A circuit breaker housing adapted to the gas generating hood according to any one of claims 1 to 5, characterized in that: It includes two groups of the following structures: The matching groove is integrally formed on the inner surface of the outer wall of the circuit breaker housing, and one side of the matching groove is provided with an entry opening for the sleeve portion to enter, and can limit the movement of the sleeve portion placed therein along the axial direction of the circuit breaker housing; The limiting groove is integrally formed in the matching groove, and is used to form a limiting match with the matching part, and can limit the movement of the sleeve part placed in the matching groove along the axis direction of the gas generating hood.

7. The circuit breaker housing according to claim 6, characterized in that: The entrance openings of the two matching grooves are arranged in opposite directions.

8. The circuit breaker housing according to claim 6, characterized in that: The circumference of the matching groove is provided with an inclined surface.

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