Exhaust structure and circuit breaker

Abstract

The embodiment of the utility model provides an exhaust structure and a circuit breaker, and relates to the field of electrical elements. The exhaust structure comprises a shell, a first arc barrier and a second arc barrier, wherein a bent exhaust channel is formed in the shell, and the first arc barrier and the second arc barrier are arranged at the input end and the output end of the exhaust channel respectively. When the exhaust structure carries out exhaust operation, the exhaust path of electrified free gas can be prolonged through the bent shape of the exhaust channel, so that electrodissociates in the gas have more residual time, the electrodissociates can be conveniently adsorbed and blocked by the first arc barrier and the second arc barrier, the exhaust amount of the electrodissociates is reduced, and the service life of the electrodissociates is prolonged. Therefore, the damage to the insulation strength around the circuit device and the damage to electrical elements are reduced. The circuit breaker comprises the exhaust structure and has all functions of the exhaust structure.

Description

Technical Field

[0001] The utility model relates to the field of electrical components, in particular to an exhaust structure and a circuit breaker. Background Art

[0002] When the moving contacts and stationary contacts in the circuit breaker are disconnected, an arc will be generated. The arc energy will form charged free gas inside the circuit breaker, causing a pressure difference between the inside and outside of the circuit breaker. The charged free gas will pass through the arc extinguishing chamber and be discharged. After the charged free gas is discharged, it will affect the insulation strength around the circuit breaker and cause short-circuit damage to surrounding components.

[0003] Therefore, in the prior art, when charged free gas is discharged, it will damage the insulation strength and electrical components around the circuit. Utility Model Content

[0004] The utility model provides an exhaust structure and a circuit breaker, which can reduce the discharge of electrically free bodies, thereby reducing the insulation strength around the circuit device and the damage caused to the electrical components.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] An embodiment of the utility model provides an exhaust structure, which includes:

[0007] A housing, a first arc-isolating grid and a second arc-isolating grid;

[0008] Wherein, a bent exhaust passage is formed in the shell, and the first arc isolation grid and the second arc isolation grid are respectively arranged at the input end and the output end of the exhaust passage.

[0009] Optionally, a housing cavity is formed in the shell, the housing cavity is used to accommodate the arc extinguishing chamber, the first arc isolation grid is close to the arc extinguishing chamber relative to the second arc isolation grid, and the exhaust channel is used to be arranged at the rear end of the arc extinguishing chamber.

[0010] Optionally, the exhaust channel includes a connected converging section and at least two discharge sections, the discharge section is bent, the first arc-isolating grid is arranged at one end of the converging section away from the discharge section, and the second arc-isolating grid is arranged at one end of the discharge section away from the converging section.

[0011] Optionally, at least two flow-guiding protrusions are alternately arranged in the shell, and the side walls of the flow-guiding protrusions and the inner wall of the shell together form the discharge section.

[0012] Optionally, a limiting groove is formed in the shell, and the first arc isolation grid is accommodated in the limiting groove.

[0013] Optionally, a limiting protrusion is provided in the housing, the limiting protrusion is formed by extending the side wall of the limiting groove, and the limiting protrusion is pressed against a surface of the first arc isolation grid close to the second arc isolation grid.

[0014] Optionally, the outer wall of the shell is recessed inward to form the avoidance groove, and the avoidance groove is located between the two discharge sections.

[0015] Optionally, the first arc isolation grid is provided with at least two first through holes, the second arc isolation grid is provided with at least two second through holes, and both the first through holes and the second through holes are communicated with the exhaust channel.

[0016] Optionally, the first arc isolation grid and / or the second arc isolation grid are made of metal.

[0017] An embodiment of the utility model further provides a circuit breaker, comprising an arc extinguishing chamber and the exhaust structure, wherein the arc extinguishing chamber is accommodated in a containing cavity in the housing, and the exhaust passage is located at the rear end of the arc extinguishing chamber.

[0018] The beneficial effects of the exhaust structure and circuit breaker of the embodiment of the utility model include, for example:

[0019] The exhaust structure includes a shell, a first arc-isolating grid and a second arc-isolating grid; wherein a bent exhaust passage is formed in the shell, and the first arc-isolating grid and the second arc-isolating grid are respectively arranged at the input end and the output end of the exhaust passage. When the exhaust structure is performing an exhaust operation, the exhaust path of the charged ionized gas can be extended by the bent shape of the exhaust passage, so that the electrically ionized bodies in the gas have more residual time, and thus are conveniently adsorbed and blocked by the first arc-isolating grid and the second arc-isolating grid, thereby reducing the discharge amount of the electrically ionized bodies, and thus reducing the insulation strength around the circuit device and the damage to the electrical components.

[0020] The circuit breaker includes an exhaust structure, which has all the functions of an exhaust structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of the exhaust structure provided in an embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the housing provided in the embodiment of the utility model;

[0024] Figure 3 A schematic diagram of the structure of a first arc isolation grid provided in an embodiment of the utility model;

[0025] Figure 4 It is a schematic structural diagram of the second arc isolation grid provided in the embodiment of the utility model.

[0026] Icons: 100-exhaust structure; 110-shell; 111-exhaust channel; 1111-convergence section; 1112-discharge section; 112-accommodation cavity; 113-guiding protrusion; 114-limiting groove; 115-limiting protrusion; 116-avoidance groove; 120-first arc-shielding grid; 121-first through hole; 130-second arc-shielding grid; 131-second through hole. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0031] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0032] The terms "comprises," "comprising," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0033] Unless otherwise clearly specified and limited, the terms "disposed", "connected" and the like should be understood in a broad sense. For example, "connected" 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 a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0035] Please refer to Figure 1 and Figure 2 The exhaust structure 100 and the circuit breaker provided in the embodiment of the utility model can solve the above-mentioned problems, which will be described in detail below.

[0036] The exhaust structure 100 is used for a circuit breaker, and includes a housing 110, a first arc-isolating grid 120 and a second arc-isolating grid 130; wherein a bent exhaust passage 111 is formed in the housing 110, and the first arc-isolating grid 120 and the second arc-isolating grid 130 are respectively arranged at the input end and the output end of the exhaust passage 111.

[0037] When the exhaust structure 100 is performing an exhaust operation, the bent shape of the exhaust channel 111 can extend the exhaust path of the charged ionized gas, so that the charged ionized bodies in the gas have more residual time, thereby facilitating the first arc-isolating grid 120 and the second arc-isolating grid 130 to adsorb and block them, reducing the exhaust amount of the charged ionized bodies, thereby reducing the insulation strength around the circuit device and the damage to the electrical components.

[0038] It is worth noting that the exhaust channel 111 is bent, which means that the exhaust channel 111 is not a straight extension structure, that is, the flow of the charged free gas in the exhaust channel 111 needs to be directional adjusted, and it is not possible to pass through the exhaust channel 111 by moving in the same direction. As for the reversing angle of the charged free gas, it is not limited.

[0039] refer to Figure 1 and Figure 2 A housing 110 is formed with a housing cavity 112 for accommodating an arc extinguishing chamber. The first arc-isolating grid 120 is closer to the arc-extinguishing chamber than the second arc-isolating grid 130 . The exhaust passage 111 is arranged at the rear end of the arc-extinguishing chamber.

[0040] During the operation of the circuit breaker, an arc is generated when the moving contact and the static contact are disconnected, especially when a short-circuit current occurs. The huge arc energy will form charged free gas inside the circuit breaker. The arc extinguishing chamber can extinguish the arc and suppress the current, thereby alleviating the generation of charged free gas.

[0041] In order to improve the relative position stability between the arc extinguishing chamber and the shell 110, the arc extinguishing chamber can be placed in the accommodating cavity 112, and the relative position of the arc extinguishing chamber and the exhaust channel 111 is limited, so that the charged ionized gas can move to the exhaust channel 111 for adsorption and discharge after passing through the arc extinguishing chamber.

[0042] refer to Figure 1 and Figure 2 The exhaust channel 111 includes a connected converging section 1111 and at least two discharge sections 1112, the discharge section 1112 is bent, the first arc-isolating grid 120 is arranged at one end of the converging section 1111 away from the discharge section 1112, and the second arc-isolating grid 130 is arranged at one end of the discharge section 1112 away from the converging section 1111.

[0043] The converging section 1111 is used to converge the charged free gas entering the exhaust channel 111, and the charged free gas can be discharged through multiple positions through multiple discharge sections 1112, thereby improving the discharge efficiency.

[0044] In this embodiment, a single converging section 1111 corresponds to two discharge sections 1112, which can ensure improved discharge efficiency on the one hand, and avoid complex structure caused by too many discharge sections 1112 on the other hand, thereby avoiding excessive raw material support and processing costs.

[0045] Of course, in other embodiments of the present invention, a single converging section 1111 may correspond to one, three, or five discharging sections 1112, and the specific corresponding quantity relationship is not limited.

[0046] Furthermore, in order to facilitate the avoidance of the outer connecting harness, the discharge sections 1112 corresponding to the same convergence section 1111 can be spaced apart and the movement path of the charged free gas in the discharge section 1112 can be increased. The outer wall of the shell 110 can be recessed inward to form an avoidance groove 116, and the avoidance groove 116 is located between the two discharge sections 1112.

[0047] In this embodiment, the avoidance groove 116 is U-shaped; of course, in other embodiments of the present invention, the avoidance groove 116 may also be other shapes such as W-shaped, C-shaped, and the specific shape is not limited.

[0048] refer to Figure 1 and Figure 2 In order to reduce the difficulty of forming the bent discharge section 1112, at least two guide protrusions 113 may be alternately arranged in the shell 110, and the side wall of the guide protrusion 113 and the inner wall of the shell 110 together form the discharge section 1112.

[0049] That is, when the charged free gas moves, it needs to first avoid the guide protrusion 113 located on the first side, then avoid the guide protrusion 113 located on the second side, and then avoid the guide protrusion 113 located on the first side, and then circumvent it in sequence, so that the flow path of the charged free gas is a bend, so as to extend the movement time of the charged free gas in the exhaust channel 111.

[0050] It is worth noting that, compared with directly processing the bent discharge section 1112 in the shell 110, the processing difficulty, cost and molding speed of the discharge section 1112 formed by the guide protrusion 113 and the shell 110 are lower.

[0051] refer to Figure 1 and Figure 2 Because there is more charged free gas at the input end of the exhaust channel 111 and the gas pressure is relatively high, in order to improve the position stability of the first arc isolation grid 120, a limiting groove 114 can be formed in the shell 110, and the first arc isolation grid 120 is accommodated in the limiting groove 114, thereby preventing the first arc isolation grid 120 from easily changing position due to gas impact.

[0052] Specifically, a limiting protrusion 115 can be set in the shell 110. The limiting protrusion 115 is formed by extending the side wall of the limiting groove 114. The limiting protrusion 115 is pressed against a side of the first arc isolation grid 120 close to the second arc isolation grid 130. By setting the limiting protrusion 115, the contact area with the first arc isolation grid 120 can be increased, and the first arc isolation grid 120 can be pressed and supported.

[0053] It is worth noting that, in order to improve the position stability of the second arc isolation grid 130 , a limiting groove 114 and a limiting protrusion 115 can also be set at a position corresponding to the output end of the exhaust channel 111 in the shell 110 to support the second arc isolation grid 130 .

[0054] refer to Figure 1 , Figure 3 and Figure 4In order to avoid negative impact on exhaust effect when setting the first arc isolation grid 120 and the second arc isolation grid 130, the first arc isolation grid 120 can be provided with at least two first through holes 121, and the second arc isolation grid 130 can be provided with at least two second through holes 131, and the first through holes 121 and the second through holes 131 are both connected to the exhaust channel 111.

[0055] After leaving the arc extinguishing chamber, the charged ionized gas will first contact the first arc isolation grid 120, pass through the first through hole 121 to enter the converging section 1111 of the exhaust channel 111, and then be divided into different discharge sections 1112, and then contact the second arc isolation grid 130, and then pass through the second through hole 131 to be discharged from the circuit breaker.

[0056] In the present embodiment, the number of the first through hole 121 and the second through hole 131 is multiple and arranged in an array, and the cross-sections of the first through hole 121 and the second through hole 131 are both circular; in other embodiments of the present invention, the cross-sections of the first through hole 121 and the second through hole 131 can also be other shapes such as rectangle, triangle, prism, fan-shaped, etc., and the specific cross-sectional shapes of the first through hole 121 and the second through hole 131 are not limited.

[0057] Furthermore, in order to enhance the adsorption effect of the first arc isolation grid 120 and the second arc isolation grid 130 on the electrically ionized body, the first arc isolation grid 120 and the second arc isolation grid 130 may be made of metal materials, which may specifically be iron, copper, etc. The specific metal material type of the first arc isolation grid 120 and the second arc isolation grid 130 is not limited.

[0058] The embodiment of the utility model further provides a circuit breaker, including an arc extinguishing chamber and an exhaust structure 100, wherein the arc extinguishing chamber is accommodated in a receiving cavity 112 in a housing 110, and an exhaust passage 111 is located at the rear end of the arc extinguishing chamber. The circuit breaker includes the exhaust structure 100, which has all the functions of the exhaust structure 100.

[0059] It is worth noting that in order to improve the positioning stability of the arc extinguishing chamber in the accommodating cavity 112, a buckle position can be formed on the side wall of the accommodating cavity 112, and a card groove can be formed on the outer wall of the arc extinguishing chamber. The card groove cooperates with the buckle position, so that the arc extinguishing chamber can be snap-connected to the accommodating cavity 112.

[0060] In summary, the exhaust structure 100 and the circuit breaker have at least the following advantages:

[0061] (1) The exhaust structure 100 can extend the exhaust path of the charged ionized gas through the bending shape of the exhaust channel 111, so that the charged ionized bodies in the gas have more residual time, thereby facilitating the first arc-isolating grid 120 and the second arc-isolating grid 130 to adsorb and block them, reducing the exhaust amount of the charged ionized bodies, thereby reducing the insulation strength around the circuit device and the damage to the electrical components.

[0062] (2) The exhaust structure 100 can have at least two guide protrusions 113 alternately arranged in the shell 110, and the side walls of the guide protrusions 113 and the inner wall of the shell 110 together form the discharge section 1112, thereby reducing the difficulty of forming the bent discharge section 1112.

[0063] (3) The exhaust structure 100 can form a limiting groove 114 in the shell 110. The first arc isolation grid 120 is accommodated in the limiting groove 114, which can improve the relative position stability between the first arc isolation grid 120 and the shell 110, thereby preventing the first arc isolation grid 120 from easily changing its position due to gas impact.

[0064] (4) The exhaust structure 100 can be provided with a limiting protrusion 115 in the shell 110. The limiting protrusion 115 is formed by extending from the side wall of the limiting groove 114. The limiting protrusion 115 abuts against a side of the first arc isolation grid 120 close to the second arc isolation grid 130. By providing the limiting protrusion 115, the contact area with the first arc isolation grid 120 can be increased, and the first arc isolation grid 120 can be supported and abutted.

[0065] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An exhaust structure, characterized in that: include: A housing (110), a first arc isolation grid (120) and a second arc isolation grid (130); A bent exhaust passage (111) is formed in the housing (110), and the first arc isolation grid (120) and the second arc isolation grid (130) are respectively arranged at the input end and the output end of the exhaust passage (111).

2. The exhaust structure according to claim 1, characterized in that: A housing cavity (112) is formed in the housing (110), the housing cavity (112) being used to accommodate an arc extinguishing chamber, the first arc isolation grid (120) being closer to the arc extinguishing chamber than the second arc isolation grid (130), and the exhaust channel (111) being used to be arranged at the rear end of the arc extinguishing chamber.

3. The exhaust structure according to claim 1, characterized in that: The exhaust passage (111) comprises a connected converging section (1111) and at least two discharge sections (1112); the discharge section (1112) is bent; the first arc isolation grid (120) is arranged at one end of the converging section (1111) away from the discharge section (1112); and the second arc isolation grid (130) is arranged at one end of the discharge section (1112) away from the converging section (1111).

4. The exhaust structure according to claim 3, characterized in that: At least two flow-guiding protrusions (113) are arranged in an alternating manner in the shell (110); the side walls of the flow-guiding protrusions (113) and the inner wall of the shell (110) together form the discharge section (1112).

5. The exhaust structure according to claim 3, characterized in that: A limiting groove (114) is formed in the housing (110), and the first arc isolation grid (120) is accommodated in the limiting groove (114).

6. The exhaust structure according to claim 5, characterized in that: A limiting protrusion (115) is arranged in the housing (110), the limiting protrusion (115) is formed by extending the side wall of the limiting groove (114), and the limiting protrusion (115) abuts against a surface of the first arc isolation grid (120) close to the second arc isolation grid (130).

7. The exhaust structure according to claim 6, characterized in that: The outer wall of the housing (110) is recessed inward to form an avoidance groove (116), and the avoidance groove (116) is located between the two discharge sections (1112).

8. The exhaust structure according to any one of claims 1 to 7, characterized in that: The first arc isolation grid (120) is provided with at least two first through holes (121), the second arc isolation grid (130) is provided with at least two second through holes (131), and both the first through holes (121) and the second through holes (131) are in communication with the exhaust passage (111).

9. The exhaust structure according to any one of claims 1 to 7, characterized in that: The first arc isolation grid (120) and / or the second arc isolation grid (130) are made of metal.

10. A circuit breaker, characterized in that: It comprises an arc extinguishing chamber and an exhaust structure as claimed in any one of claims 1 to 9, wherein the arc extinguishing chamber is accommodated in a containing cavity (112) in the shell (110), and the exhaust channel (111) is located at the rear end of the arc extinguishing chamber.

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