Circuit breaker arc extinguish chamber gas production piece installation structure

Abstract

A mounting structure for a gas production part of an arc extinguish chamber of a circuit breaker is characterized by comprising the gas production part, the gas production part is connected with the outer side wall of the arc extinguish chamber through a buckle structure, and the buckle structure comprises a limiting boss and a limiting surface which are arranged on the outer side wall of the arc extinguish chamber. A clamping table and an abutting face are arranged at the positions, corresponding to the limiting boss and the limiting face, of the gas generation piece, and the limiting boss and the limiting face are installed on the clamping table and the abutting face in a matched mode respectively. The matching positions of the arc extinguish chambers are arranged on the outer side of the arc extinguish chamber, electric arcs generated by breaking of the circuit breaker do not make contact with the fixing point of the buckle structure, the fixing structure cannot be damaged, and the gas generating piece is not prone to falling off.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and specifically relates to a gas generating component installation structure of an arc extinguishing chamber of a circuit breaker. Background Art

[0002] Circuit breakers are a crucial component of electrical distribution equipment, primarily used in industrial low-voltage power systems. They connect and disconnect current in power grid circuits and protect power lines and power equipment from faults such as overloads, undervoltages, short circuits, and single-phase grounding. The circuit breaker's interruption of overload or short-circuit currents is primarily accomplished through the arc extinguishing chamber installed within the circuit breaker. When a fault current exceeds the trip unit's set protection range, the operating mechanism actuates, rapidly opening the circuit breaker's moving and stationary contacts. The voltage between these contacts then causes a discharge in the air, generating a high-temperature arc. This arc causes the air temperature within the arc extinguishing device to rise sharply, accelerating air ionization. Furthermore, the arc is driven by the magnetic field and fluid effects within the arc extinguishing chamber, splitting the arc into multiple short arcs by arc-isolating grids. The metal arc-isolating grids enhance the arc's deionization effect, reducing the arc size and rapidly increasing the voltage, ultimately extinguishing the arc. During the arc extinguishing process, the circuit breaker's arc extinguishing chamber aims to extinguish the arc as quickly as possible within the arc extinguishing chamber. In the prior art, in order to improve the arc extinguishing effect of the arc extinguishing chamber, a gas generating component is often installed on the arc extinguishing grid. However, the traditional arc extinguishing chamber gas generating component is installed using a hot riveting process, which is inconvenient to install and has low reliability.

[0003] Chinese patent CN210778465U discloses a gas-producing part that is installed on an arc extinguishing chamber using a snap-on structure. The snap-on structure includes a hook on the side of the gas-producing piece facing the pair of side panels that are arranged face to face. The pair of side panels that are arranged face to face are provided with a hole corresponding to the hook. The hook is installed in the corresponding hole. However, the snap-on structure is easily damaged and broken by the arc and falls off. Utility Model Content

[0004] The purpose of the present utility model is to address the defect that the above-mentioned existing gas-producing parts are easily damaged and broken by electric arcs. It provides a gas-producing part installation structure for the arc extinguishing chamber of a circuit breaker, in which the arc extinguishing chamber and the arc extinguishing chamber matching position are set on the outside of the arc extinguishing chamber. The arc generated by the circuit breaker disconnection and the fixed point of the snap structure are not in contact, the fixed structure will not be damaged, and the gas-producing parts are not easy to fall off.

[0005] Technical Solution

[0006] In order to achieve the above technical objectives, the utility model provides a circuit breaker arc extinguishing chamber gas generating component installation structure, characterized in that it includes a gas generating component, and the gas generating component is connected to the outer wall of the arc extinguishing chamber through a snap structure.

[0007] In one embodiment, the snap-fit structure includes a limiting boss and a limiting surface on the outer wall of the arc extinguishing chamber, and a clamping platform and an abutting surface are provided on the gas-producing part corresponding to the limiting boss and the limiting surface, and the limiting boss and the limiting surface are respectively installed in cooperation with the clamping platform and the abutting surface.

[0008] In one embodiment, the limiting boss is located in a mounting groove on the outer side wall of the arc extinguishing chamber, and the limiting surface is a notch surface on the lower side of the mounting groove.

[0009] In one embodiment, the clamping platform is a raised table surface on the outer surface of the gas producing part, and the raised table surface is provided with an opening hole that cooperates with the limiting boss. The clamping platform is installed in the installation groove on the outer surface of the gas producing part by abutting the limiting boss.

[0010] In one embodiment, the limiting boss is engaged with the upper end of the clamping platform at the bottom of the opening hole, and the abutting surface is engaged with the notch surface at the lower side of the installation groove.

[0011] In one embodiment, the number of the snap structures is 2.

[0012] In one embodiment, the card platform is in a ∩ shape.

[0013] In one embodiment, the gas generating member is connected to both outer side walls of the arc extinguishing chamber via a snap-fit structure.

[0014] Beneficial effects

[0015] The utility model provides a mounting structure for a gas-generating component of an arc extinguishing chamber of a circuit breaker, comprising a gas-generating component connected to the outer wall of the arc extinguishing chamber via a snap-fit structure. The snap-fit structure comprises a limiting boss and a limiting surface on the outer wall of the arc extinguishing chamber. A clamping platform and an abutting surface are provided on the gas-generating component at locations corresponding to the limiting boss and the limiting surface. The limiting boss and the limiting surface are respectively mounted in conjunction with the clamping platform and the abutting surface. The arc extinguishing chamber and the arc extinguishing chamber are arranged at the outer side of the arc extinguishing chamber. The arc generated by the circuit breaker tripping does not contact the fixing point of the snap-fit structure, thereby preventing damage to the fixing structure and preventing the gas-generating component from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0017] Attachment Figure 1 This is a schematic diagram of the arc extinguishing chamber structure in an embodiment of the present utility model;

[0018] Attachment Figure 2 This is a schematic diagram of the outer wall structure of the arc extinguishing chamber in an embodiment of the present utility model;

[0019] Attachment Figure 3 This is a schematic diagram of the structure of the gas generating component in the embodiment of the utility model; DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0021] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0023] In this application, unless otherwise expressly specified or limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or that the first feature and the second feature are indirectly in contact through an intermediate medium. Furthermore, a first feature being “above,” “above,” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below,” “below,” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0025] Example

[0026] The existing gas generating parts are easy to be damaged and broken by the arc. In order to solve this problem, the following Figure 1 As shown, this embodiment provides a circuit breaker arc extinguishing chamber gas generating component installation structure, which includes a gas generating component 1, the gas generating component 1 and the outer wall 201 of the arc extinguishing chamber 2 are connected by a snap structure, and the snap structure includes the following Figure 2 The limiting boss 201a and limiting surface 201b on the outer wall 201 of the arc extinguishing chamber 2 are shown in the attached Figure 3 The gas producing component 1 shown is provided with a clamping platform 101 and an abutting surface 102 at positions corresponding to the limiting boss 201a and the limiting surface 201b. The limiting boss 201a and the limiting surface 201b are respectively mounted in cooperation with the clamping platform 101 and the abutting surface 102.

[0027] Among them, as attached Figure 2 As shown, the limiting boss 201a is located in the mounting groove 201c on the outer wall 201 of the arc extinguishing chamber 2, and the limiting surface 201b is the notch surface on the lower side of the mounting groove 201c. Figure 3 As shown, the clamping platform 101 is a raised surface on the outer surface of the gas-generating component. The raised surface is provided with an opening 101a that mates with the limiting boss 201a. The clamping platform 101 is mounted within a mounting groove 201c on the outer surface of the gas-generating component by abutting the limiting boss 201a. The limiting boss 201a engages with the bottom of the upper end of the clamping platform 101, and the abutting surface 102 engages with the notched surface below the mounting groove 201c. To ensure secure and reliable installation, the number of snap structures is preferably two, and both outer walls 201 of the arc-extinguishing chamber 2 are connected by snap structures. The clamping platform 101 is preferably ∩-shaped.

[0028] When installed in this way, the arc chamber and the arc extinguishing chamber are arranged at the outside of the arc extinguishing chamber. The arc generated by the circuit breaker is not in contact with the fixed point of the snap structure, which will not damage the fixed structure and the gas-generating parts are not easy to fall off.

[0029] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0030] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A gas generating component mounting structure for an arc extinguishing chamber of a circuit breaker, characterized by: It comprises a gas generating part (1), wherein the gas generating part (1) is connected to an outer side wall (201) of an arc extinguishing chamber (2) via a snap-fit structure.

2. A circuit breaker arc extinguishing chamber gas generating component installation structure according to claim 1, characterized in that: The snap-fit structure comprises a limiting boss (201a) and a limiting surface (201b) on the outer side wall (201) of the arc extinguishing chamber (2); a clamping platform (101) and an abutting surface (102) are provided on the gas producing part (1) at positions corresponding to the limiting boss (201a) and the limiting surface (201b); the limiting boss (201a) and the limiting surface (201b) are respectively mounted in cooperation with the clamping platform (101) and the abutting surface (102).

3. A gas generating component mounting structure for an arc extinguishing chamber of a circuit breaker according to claim 2, characterized in that: The limiting boss (201a) is located in a mounting groove (201c) on the outer side wall (201) of the arc extinguishing chamber (2), and the limiting surface (201b) is a notched surface on the lower side of the mounting groove (201c).

4. A gas generating component mounting structure for an arc extinguishing chamber of a circuit breaker according to claim 2, characterized in that: The clamping platform (101) is a raised table surface on the outer surface of the gas-generating component, and an opening hole (101a) is provided on the raised table surface to cooperate with the limiting boss (201a). The clamping platform (101) is installed in the installation groove (201c) on the outer surface of the gas-generating component by abutting the limiting boss (201a).

5. A gas generating component mounting structure for an arc extinguishing chamber of a circuit breaker according to claim 4, characterized in that: The limiting boss (201a) is clamped with the bottom of the upper end of the clamping platform (101), and the abutting surface (102) is clamped with the lower notch surface of the installation groove (201c).

6. The installation structure of a gas generating component of a circuit breaker arc extinguishing chamber according to claim 1, characterized in that: The number of the snap structures is 2.

7. The installation structure of a gas generating component of a circuit breaker arc extinguishing chamber according to claim 2, characterized in that: The card platform (101) is in a ∩ shape.

8. The installation structure of a gas generating component of a circuit breaker arc extinguishing chamber according to claim 1, characterized in that: The gas generating part (1) and the two outer side walls (201) of the arc extinguishing chamber (2) are connected via a snap-fit structure.

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