Arc extinguish chamber mounting structure capable of improving sealing performance

Abstract

An arc extinguish chamber installation structure capable of improving sealing performance comprises an arc extinguish chamber which is installed in an inner cavity of a circuit breaker, and is characterized in that a sealing structure is arranged between the arc extinguish chamber and the circuit breaker; a convex-concave matching structure is additionally arranged when the arc extinguish chamber and the base are installed in a matched mode, so that an assembling gap is eliminated, electric arcs are prevented from leaking out of the gap, and the arc extinguishing capacity of the arc extinguish chamber is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and specifically relates to an arc extinguishing chamber installation structure for improving the sealing performance. Background Art

[0002] A circuit breaker is an important part of distribution electrical appliances, mainly used in industrial low-voltage power systems to connect and disconnect the current in the power grid circuit and protect the line and power supply equipment from the hazards of overload, undervoltage, short circuit, single-phase grounding and other faults. The function of the circuit breaker to break the overload or short-circuit current is mainly completed by the arc extinguishing chamber installed in the circuit breaker. When a fault current appears in the circuit and the current value exceeds the set protection range of the release, the operating mechanism acts to quickly disconnect the moving and static contacts of the circuit breaker. At this time, the voltage between the moving and static contacts causes the air medium to discharge, thus generating a high-temperature arc. During the combustion process of the arc, the air temperature in the arc extinguishing device rises sharply, accelerating the ionization of the air. On the other hand, under the promotion of the magnetic field and fluid effect in the arc extinguishing chamber, the arc is separated into multiple short arcs by multiple arc dividing grids, and the deionization effect of the arc is strengthened by the metal arc dividing plates. The arc becomes smaller and the voltage rises rapidly, causing the arc to extinguish. During the arc extinguishing process of the arc extinguishing chamber of the circuit breaker, it is hoped that the arc can enter the arc extinguishing chamber as much as possible to be extinguished. However, in the prior art, there is a gap when the arc extinguishing chamber and the base in the universal circuit breaker are installed in cooperation, and the arc is likely to leak out from the gap. Content of the Utility Model

[0003] Aiming at the defect that there is a gap when the arc extinguishing chamber and the base in the universal circuit breaker are installed in cooperation, and the arc is likely to leak out from the gap, the purpose of the utility model is to provide an arc extinguishing chamber installation structure for improving the sealing performance, which adds a convex-concave matching structure when the arc extinguishing chamber and the base are installed in cooperation, eliminates the assembly gap, avoids the arc from leaking out from the gap, and improves the arc extinguishing ability of the arc extinguishing chamber.

[0004] Technical Solution

[0005] In order to achieve the above technical purpose, the utility model provides an arc extinguishing chamber installation structure for improving the sealing performance, which includes an arc extinguishing chamber installed in the inner cavity of the circuit breaker, and is characterized in that: a sealing structure is arranged between the arc extinguishing chamber and the circuit breaker;

[0006] The sealing structure includes a first convex platform arranged along the height direction of the arc extinguishing chamber on at least one side of the arc extinguishing cover in the arc extinguishing chamber, and a first concave part is arranged at the corresponding position on the base of the circuit breaker, and the first convex platform is installed in cooperation with the first concave part.

[0007] In one embodiment, a second boss is provided at one end of the arc extinguishing cover close to the base in the height direction of the arc extinguishing chamber along the width direction of the arc extinguishing chamber. A second recess is provided on the base of the circuit breaker corresponding to the second boss, and the second boss and the second recess are fitted and installed.

[0008] In one embodiment, a third recess is provided on the bottom plate of the circuit breaker corresponding to the first boss, and the first boss and the third recess are fitted and installed.

[0009] In one embodiment, a third boss is provided at one end of the arc extinguishing cover close to the bottom plate in the height direction of the arc extinguishing chamber along the width direction of the arc extinguishing chamber. A fourth recess is provided on the bottom plate of the circuit breaker corresponding to the third boss, and the third boss and the fourth recess are fitted and installed.

[0010] Further, the first boss and the side surface of the arc extinguishing cover form an L shape.

[0011] In one embodiment, first bosses are provided on both sides of the arc extinguishing cover in the arc extinguishing chamber along the height direction of the arc extinguishing chamber.

[0012] Beneficial effects

[0013] The present utility model provides an arc extinguishing chamber installation structure for improving the sealing performance, which includes an arc extinguishing chamber installed in the inner cavity of a circuit breaker. It is characterized in that a sealing structure is provided between the arc extinguishing chamber and the circuit breaker; a convex-concave matching structure is added when the arc extinguishing chamber and the base are fitted and installed, eliminating the assembly gap and avoiding the leakage of electric arcs from the gap, thereby improving the arc extinguishing ability of the arc extinguishing chamber. Brief description of the drawings

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0015] Att Figure 1 is a schematic diagram of the connection structure between the arc extinguishing chamber and the base in the embodiment of the present utility model;

[0016] Att Figure 2a is a schematic diagram of the structure of the arc extinguishing cover in the embodiment of the present utility model Figure 1 ;

[0017] Att Figure 2b is a second schematic diagram of the structure of the arc extinguishing cover in the embodiment of the present utility model;

[0018] Att Figure 3 is a schematic diagram of the structure of the base in the embodiment of the present utility model;

[0019] Attached Figure 4 is a schematic diagram of the bottom plate structure in an embodiment of the present utility model;

[0020] Attached Figure 5 is a schematic diagram of a circuit breaker product in an embodiment of the present utility model; Specific embodiments

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0022] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0024] In the present application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first feature is in direct contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0025] 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 technical field 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 related listed items.

[0026] Embodiment

[0027] In the prior art, when the arc extinguishing chamber and the base in the universal circuit breaker are assembled, there are inevitably gaps, and the arc is likely to leak from the gaps. To solve this problem, as shown in the appendix Figure 1 and 5 This embodiment provides an arc extinguishing chamber mounting structure with improved sealing performance. It includes an arc extinguishing chamber 1, and the arc extinguishing chamber 1 is installed in the inner cavity of the circuit breaker 2, and a sealing structure is provided between the arc extinguishing chamber 1 and the circuit breaker 2; specifically, as shown in the appendix Figure 2a As shown, the sealing structure includes a first convex platform 101a provided on at least one side of the arc extinguishing cover 101 in the arc extinguishing chamber 1 along the height direction of the arc extinguishing chamber 1 (i.e., the y-axis direction in the appendix Figure 2a ), as shown in the appendix Figure 3 A first concave portion 201a is provided at the corresponding position on the base 201 of the circuit breaker 2 for the first convex platform 101a, and the first convex platform 101a and the first concave portion 201a are assembled, as shown in the appendix Figure 2a As shown, a second convex platform 101b is provided on the arc extinguishing cover 101 at one end close to the base 201 in the height direction of the arc extinguishing chamber along the width direction of the arc extinguishing chamber 1 (i.e., the x-axis direction in the appendix Figure 2a ), as shown in the appendix Figure 3 A second concave portion 201b is provided at the corresponding position on the base 201 of the circuit breaker 2 for the second convex platform 101b, and the second convex platform 101b and the second concave portion 201b are assembled. In this embodiment, as shown in the appendix Figure 5 As shown, the circuit breaker bottom plate 202 and the base 201 enclose a cavity, as shown in the appendix Figure 4 A third concave portion 202a is provided at the corresponding position on the bottom plate 202 of the circuit breaker 2 for the first convex platform 101a, and the first convex platform 101a and the third concave portion 202a are assembled.

[0028] Meanwhile, as shown in the appendix Figure 2a and 2b As shown, at one end of the arc extinguishing cover 101 close to the bottom plate 202 in the height direction of the arc extinguishing chamber along the width direction of the arc extinguishing chamber 1 (i.e., the appendix Figure 2aIn the X-axis direction of the arc extinguishing chamber 1, there is a third boss 101c. At the position corresponding to the third boss 101c on the bottom plate 202 of the circuit breaker 2, there is a fourth recess 202b. The third boss 101c is fitted and installed with the fourth recess 202b. In this embodiment, the third recess 202a and the fourth recess 202b on the bottom plate 202 of the circuit breaker 2 are integrated into a plane.

[0029] That is, preferably, on both sides of the arc extinguishing cover 101 in the arc extinguishing chamber 1, first bosses 101a are provided along the height direction of the arc extinguishing chamber 1. At the position corresponding to the first bosses 101a on the base 201 of the circuit breaker 2, there are first recesses 201a. The first bosses 101a are fitted and installed with the first recesses 201a. At the position corresponding to the first bosses 101a on the bottom plate 202 of the circuit breaker 2, there are third recesses 202a. The first bosses 101a are fitted and installed with the third recesses 202a. In this embodiment, the side surface of the joint between the first bosses 101a and the arc extinguishing cover 101 forms an L shape. The utility model provides an arc extinguishing chamber installation structure for improving the sealing performance. When the arc extinguishing chamber and the base are fitted and installed, a convex-concave matching structure is added, eliminating the assembly gap and avoiding the leakage of the electric arc from the gap, and improving the arc extinguishing ability of the arc extinguishing chamber.

[0030] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0031] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An arc extinguishing chamber installation structure for improving sealing performance, which includes an arc extinguishing chamber (1), and the arc extinguishing chamber (1) is installed in the inner cavity of a circuit breaker (2), and is characterized in that: A sealing structure is provided between the arc extinguishing chamber (1) and the circuit breaker (2); The sealing structure includes a first boss (101a) provided on at least one side of the arc extinguishing cover (101) in the arc extinguishing chamber (1) along the height direction of the arc extinguishing chamber (1). A first recess (201a) is provided at the corresponding position on the base (201) of the circuit breaker (2). The first boss (101a) and the first recess (201a) are fitted and installed.

2. The arc extinguishing chamber installation structure for improving the sealing performance according to claim 1, characterized in that: A second boss (101b) is provided on the arc extinguishing cover (101) along the width direction of the arc extinguishing chamber (1) at one end close to the base (201) in the height direction of the arc extinguishing chamber (1). A second recess (201b) is provided at the corresponding position on the base (201) of the circuit breaker (2). The second boss (101b) and the second recess (201b) are fitted and installed.

3. The arc extinguishing chamber mounting structure for improving the sealing performance according to claim 1, characterized in that: A third recess (202a) is provided on the bottom plate (202) of the circuit breaker (2) at the corresponding position of the first boss (101a). The first boss (101a) and the third recess (202a) are fitted and installed.

4. The arc extinguishing chamber installation structure for improving the sealing performance according to claim 1, characterized in that: A third boss (101c) is provided on the arc extinguishing cover (101) along the width direction of the arc extinguishing chamber (1) at one end close to the bottom plate (202) in the height direction of the arc extinguishing chamber (1). A fourth recess (202b) is provided at the corresponding position on the bottom plate (202) of the circuit breaker (2). The third boss (101c) and the fourth recess (202b) are fitted and installed.

5. The arc extinguishing chamber mounting structure for improving sealing performance according to claim 1, characterized in that: The first boss (101a) and the side surface of the arc extinguishing cover (101) form an L shape.

6. The arc extinguishing chamber mounting structure for improving the sealing performance according to claim 1, characterized in that: First bosses (101a) are provided on both sides of the arc extinguishing cover (101) in the arc extinguishing chamber (1) along the height direction of the arc extinguishing chamber (1).

Images