Shell assembly and circuit breaker
By designing the expansion chamber in the housing assembly to connect with the arc extinguishing chamber, the problem of the arc extinguishing performance of the circuit breaker deteriorates when the number of locking clips is increased, and a better arc extinguishing effect is achieved.
Patent Information
- Application Number
- CN202421225465.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-31
AI Technical Summary
When the existing circuit breaker increases the number of locking clips, the additional connection structure will affect the original arc extinguishing chamber, resulting in a degradation of arc extinguishing performance.
A housing assembly is designed, including a base and a cover plate that is closed together. An expansion cavity is formed between the base and the cover plate, and the expansion cavity is connected to the arc extinguishing chamber, thereby enlarging the space of the arc extinguishing chamber to improve arc extinguishing performance.
Through the connection between the expansion chamber and the arc extinguishing chamber, the space of the arc extinguishing chamber is increased, the gas discharge and arc extinguishing effects are improved, and the arc extinguishing performance of the arc extinguishing chamber is improved.
Smart Images
Figure CN222483248U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the technical field of electrical components, and in particular to a housing assembly and a circuit breaker. Background Art
[0002] During use, the circuit breaker usually needs to be fixed on the rail with a locking clip to facilitate the installation of the circuit breaker in the power distribution cabinet. As user needs change, circuit breakers that can be used with two locking clips have appeared. Compared with the fixing method of a single locking clip, the fixing method of two locking clips makes it easier to install and remove the circuit breaker in a small space.
[0003] The locking clip needs to be used in conjunction with the corresponding connection structure on the circuit breaker. As the number of locking clips increases, the circuit breaker using double locking clips needs to be equipped with a corresponding connection structure. In the related art, the additional connection structure is located near the original arc extinguishing chamber of the circuit breaker, and the additional connection structure will affect the original arc extinguishing chamber, thereby negatively affecting the arc extinguishing performance of the original arc extinguishing chamber. Utility Model Content
[0004] The present application provides a housing assembly and a circuit breaker, which can improve the sealing of an arc extinguishing chamber to improve the arc extinguishing performance of the arc extinguishing chamber.
[0005] In a first aspect, the present application provides a housing assembly, which is applied to a circuit breaker, wherein the circuit breaker includes an arc extinguishing chamber and a locking clamp, and the housing assembly includes a base and a cover plate that cover each other. The base includes a main body portion and a mounting portion that are connected to each other, and an arc extinguishing chamber is formed between the main body portion and the cover plate. The locking clamp is installed on the mounting portion, and a mounting gap is formed on the mounting portion; the cover plate can block the mounting gap, and an expansion cavity is formed between the mounting portion and the cover plate, and the expansion cavity is connected to the arc extinguishing chamber. The base and / or the cover plate are provided with an exhaust port, and the gas discharged from the arc extinguishing chamber passes through the expansion cavity and is discharged from the exhaust port.
[0006] Through the above scheme, the mounting portion provides an installation space for the locking clip, and an expansion cavity is formed between the mounting portion and the cover plate. Since the expansion cavity and the arc extinguishing chamber are connected, the space of the arc extinguishing chamber is expanded, which is beneficial to arc extinguishing and gas discharge, so as to improve the arc extinguishing performance of the arc extinguishing chamber.
[0007] In a possible design, the shell assembly further includes a first baffle plate, which blocks the installation gap and is located between the installation gap and the cover plate, and the expansion cavity is formed between the first baffle plate, the installation portion and the cover plate.
[0008] Through the above solution, the first baffle plate is provided to achieve the effect of shielding the installation gap, while there is no need to repeatedly set a complex structure on the cover plate. Compared with the cover plate, the first baffle plate has a simple structure and is easy to process, which is conducive to simplifying the processing technology of the shell assembly and improving the production and processing efficiency of the shell assembly.
[0009] In a possible design, the housing assembly further includes a second baffle, the second baffle is located between the base and the cover plate, and the second baffle shields a side of the arc extinguishing chamber close to the cover plate.
[0010] Through the above solution, the second baffle plate is provided to achieve the effect of shielding the installation gap, while there is no need to repeatedly set a complex structure on the cover plate. Compared with the cover plate, the second baffle plate has a simple structure and is easy to process, which is conducive to simplifying the processing technology of the shell assembly and improving the production and processing efficiency of the shell assembly.
[0011] In a possible design, the first baffle plate contacts a side of the mounting portion facing the cover plate, and / or the second baffle plate contacts a side of the arc extinguishing chamber close to the cover plate.
[0012] Through the above solution, the first baffle is in contact with the side of the mounting portion facing the cover plate, indicating that the first baffle is on the side of the mounting portion facing the cover plate, and the setting position of the first baffle is further refined, which is convenient for the installation and positioning of the first baffle, so as to improve the installation efficiency of the shell assembly. At the same time, through the sealing effect of the first baffle, the expansion cavity can maintain good sealing, so that the shell assembly as a whole can maintain good sealing.
[0013] In a possible design, the projection of the installation gap in the first direction falls within the projection range of the first baffle in the first direction. And / or, the projection of the arc extinguishing chamber in the first direction falls within the projection range of the second baffle in the first direction. The covering direction of the base and the cover is consistent with the first direction.
[0014] According to the above solution, the second baffle is in contact with the side of the arc extinguishing chamber close to the cover plate, indicating that the second baffle is located on the side of the arc extinguishing chamber close to the cover plate, and the setting position of the second baffle is further refined, which is convenient for the installation and positioning of the second baffle to improve the installation efficiency of the housing assembly. At the same time, through the sealing effect of the second baffle, the arc extinguishing chamber can maintain good sealing, so that the housing assembly as a whole can maintain good sealing.
[0015] In a possible design, the housing assembly further includes a connecting member, which is connected to the first baffle plate and the second baffle plate. The connecting member is located between the first baffle plate and the cover plate in the first direction, and between the second baffle plate and the mounting portion in the second direction. The first direction is perpendicular to the second direction, and the covering direction of the base and the cover plate is consistent with the first direction.
[0016] Through the above solution, the connecting member can form a good connection strength between the first baffle and the second baffle, and the first baffle and the second baffle can be integrated. The integrated first baffle and the second baffle can simplify the processing technology of the shell assembly, and there is no need to install the first baffle and the second baffle in steps, which can simplify the installation process of the shell assembly.
[0017] In a possible design, the connecting member includes a first sub-member and a second sub-member arranged at intervals, and the first sub-member is closer to the exhaust port than the second sub-member. One side of the first sub-member in the first direction is connected to the first baffle plate, and at least part of the other side of the first sub-member in the first direction has a through hole between the cover plate, and the arc in the expansion cavity is discharged to the exhaust port through the through hole. One side of the second sub-member in the first direction is connected to the first baffle plate, and the other side of the second sub-member in the first direction abuts against the cover plate.
[0018] Through the above scheme, the arrangement of the through hole between the first sub-component and the cover plate on at least part of the other side in the first direction can play a buffering role, block metal splashes, and reduce the flow rate of the gas after arc extinguishing in the end buffer expansion cavity, thereby reducing its energy.
[0019] In a possible design, a sealing groove is provided on one side of the arc extinguishing chamber close to the second sub-component, a sealing protrusion corresponding to the sealing groove is provided on the second sub-component, and the sealing protrusion is engaged with the sealing groove. Alternatively, a sealing protrusion is provided on one side of the arc extinguishing chamber close to the second sub-component, a sealing groove corresponding to the sealing protrusion is provided on the second sub-component, and the sealing protrusion is engaged with the sealing groove.
[0020] Through the above solution, the sealing groove and the sealing protrusion can improve the sealing between the arc extinguishing chamber and the second sub-component, thereby improving the sealing of the arc extinguishing chamber to improve the arc extinguishing performance of the arc extinguishing chamber.
[0021] In a possible design, the mounting portion is provided with a mounting groove, and the locking clip is inserted into the mounting groove.
[0022] Through the above solution, the installation groove can facilitate the installation and positioning of the locking clip, so as to improve the installation efficiency of the locking clip.
[0023] In a second aspect, the present application provides a circuit breaker, comprising two locking clips and the housing assembly of the first aspect, wherein the two locking clips are both mounted on the housing assembly.
[0024] The beneficial effects of the circuit breaker provided in the second aspect and each possible design of the second aspect can refer to the beneficial effects brought about by the first aspect and each possible implementation method of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 A schematic diagram of the structure of a circuit breaker provided in an embodiment of the present application.
[0026] Figure 2 An exploded schematic diagram of a circuit breaker provided in an embodiment of the present application.
[0027] Figure 3A schematic structural diagram of a base provided in an embodiment of the present application.
[0028] Figure 4 A schematic diagram of the assembly structure of a connector, a first baffle, a second baffle and a base provided in an embodiment of the present application.
[0029] Figure 5 A schematic structural diagram of a housing assembly provided in an embodiment of the present application.
[0030] Figure 6 A schematic diagram of the combined structure of a connecting member, a first baffle and a second baffle provided in an embodiment of the present application.
[0031] Illustration symbols: 1. Shell assembly; 11. Base; 111. Main body; 112. Mounting portion; 1121. Mounting gap; 1122. Mounting groove; 12. Cover plate; 13. Expansion cavity; 14. Exhaust port; 15. First baffle; 16. Second baffle; 17. Connector; 171. First sub-component; 172. Second sub-component; 18. Through hole; 2. Circuit breaker; 21. Arc extinguishing chamber; 22. Locking clip. DETAILED DESCRIPTION
[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.
[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0035] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.
[0036] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the current limiting module of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present application 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 therefore cannot be understood as a limitation on the present application.
[0037] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.
[0038] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).
[0039] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure can refer to a physical connection. For example, the physical connection can be a fixed connection, such as a fixed connection through a barrier, such as a fixed connection through a screw, bolt or other barrier; the physical connection can also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection can also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. The "connection" or "connection" of a circuit structure can refer to not only a physical connection, but also an electrical connection or a signal connection. For example, it can be a direct connection, that is, a physical connection, or it can be indirectly connected through at least one intermediate element, as long as the circuit is connected, and it can also be the internal connection of two elements; the signal connection can refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0040] Figure 1 A schematic diagram of the structure of a circuit breaker provided in an embodiment of the present application is shown in FIG. Figure 2 An exploded schematic diagram of a circuit breaker provided in an embodiment of the present application.
[0041] like Figure 1 As shown, the present application provides a circuit breaker 2, including two locking clips 22, an arc extinguishing chamber 21 and a housing assembly 1, the two locking clips 22 are both installed on the housing assembly 1, and the arc extinguishing chamber 21 is arranged in the housing assembly 1.
[0042] The circuit breaker 2 in the present application refers to a double locking clip circuit breaker, that is, a circuit breaker 2 with two locking clips 22 installed.
[0043] The locking clip 22 is used for connecting the circuit breaker 2 and the metal rail, and is widely used for installing the circuit breaker 2 and industrial control equipment in electrical equipment such as a power distribution cabinet. The metal rail has the characteristics of easy installation, good connection strength, and good consistency of specifications and dimensions.
[0044] Compared with the circuit breaker 2 used with a single locking clip 22, since the double locking clip circuit breaker has two upper and lower locking clips, it is convenient for the user to select the locking sequence for installation according to the actual installation conditions.
[0045] The specific structural form of the housing assembly 1 will be described in detail below and will not be expanded here.
[0046] Figure 2 An exploded schematic diagram of a circuit breaker provided in an embodiment of the present application, Figure 3 A schematic diagram of the structure of a base provided in an embodiment of the present application, Figure 4 A schematic diagram of an assembly structure of a connecting member, a first baffle, a second baffle and a base provided in an embodiment of the present application, Figure 5 A schematic structural diagram of a housing assembly provided in an embodiment of the present application.
[0047] See also Figures 2 to 5 The present application provides a housing assembly 1, which is applied to a circuit breaker 2. The circuit breaker 2 includes an arc extinguishing chamber 21 and a locking clamp 22. The housing assembly 1 includes a base 11 and a cover plate 12 that cover each other. The base 11 includes a main body 111 and a mounting portion 112 that are connected to each other, and the arc extinguishing chamber 21 is formed between the main body 111 and the cover plate 12. The locking clamp 22 is installed on the mounting portion 112, and an installation gap 1121 is formed on the mounting portion 112. The cover plate 12 can block the installation gap 1121, and an extension cavity 13 is formed between the mounting portion 112 and the cover plate 12, and the extension cavity 13 is connected to the arc extinguishing chamber 21. The base 11 and / or the cover plate 12 are provided with an exhaust port 14, and the gas discharged from the arc extinguishing chamber 21 passes through the extension cavity 13 and is discharged from the exhaust port 14.
[0048] The arc is a gas discharge phenomenon, which is an instantaneous spark generated by current passing through some insulating medium (such as air). If the arc is not extinguished immediately, it may cause safety problems, such as burns to personnel, damage to equipment, etc., and in serious cases, it may cause fire. The arc extinguishing chamber 21 can extinguish the arc to avoid safety accidents such as burns to personnel and fire caused by the arc.
[0049] The arc extinguishing method of the circuit breaker 2 of the present application is mainly through air blowing and magnetic blowing, which lengthens the cooling arc and extinguishes the arc.
[0050] The locking clip 22 matches the specifications of the metal rail, so that the circuit breaker 2 can be connected to the metal rail through the locking clip 22, so as to facilitate the installation of the circuit breaker 2 in power equipment, such as a distribution cabinet.
[0051] The connection structure between the base 11 and the cover plate 12 may be a clamping structure, or a riveting or threaded connection structure, etc. In the present application, the connection structure between the base 11 and the cover plate 12 may be a riveting structure, so that a better connection strength is formed between the base 11 and the cover plate 12, thereby providing more continuous and reliable protection for the components of the circuit breaker 2 installed between the base 11 and the cover plate 12.
[0052] The connection between the main body 111 and the mounting portion 112 may be a detachable connection such as a snap connection or a threaded connection, or a non-detachable connection such as welding or gluing. In the present application, the main body 111 and the mounting portion 112 may be formed in an integrated manner, which simplifies the mechanical structure and processing technology of the base 11 while enabling a better connection strength to be formed between the main body 111 and the mounting portion 112.
[0053] In the present application, the preparation process of the cover plate 12 and the base 11 can be injection molding. The cover plate 12 and the base 11 are processed by injection molding. Considering the processing cost, a through treatment is made at the mounting portion 112, which is convenient for demoulding and reduces the mold cost. This processing technology forms a clear gap between the mounting portion 112 and the main body 111 after processing, and the gap is connected to the outside.
[0054] An expansion cavity 13 is formed between the mounting portion 112 and the cover plate 12, and the expansion cavity 13 is connected to the arc extinguishing chamber 21 so that the expansion cavity 13 expands the space of the arc extinguishing chamber 21, making it easier to discharge the high-temperature gas generated by arc extinguishing and the arc easier to transfer to the gas outlet, so as to improve the arc extinguishing performance of the arc extinguishing chamber 21.
[0055] The arrangement of the cover plate 12 shielding the installation gap 1121 can improve the sealing performance of the expansion chamber 13. Since the expansion chamber 13 is connected to the arc extinguishing chamber 21, the sealing performance of the arc extinguishing chamber 21 is also improved.
[0056] There are many ways to implement the exhaust port 14 on the base 11 and / or the cover plate 12. In an optional embodiment, only the base 11 may be provided with the exhaust port 14. In this case, the gas exhausted from the arc extinguishing chamber 21 passes through the expansion cavity 13 and then is exhausted from the exhaust port 14 on the base 11.
[0057] In another optional embodiment, only the cover plate 12 may be provided with the exhaust port 14 . In this case, the gas exhausted from the arc extinguishing chamber 21 passes through the expansion cavity 13 and then is exhausted from the exhaust port 14 .
[0058] In yet another alternative embodiment, Figure 5 As shown, the base 11 and the cover plate 12 may both be provided with an exhaust port 14. Specifically, a portion of the exhaust port 14 is provided on the base 11, and another portion of the exhaust port 14 is provided on the cover plate 12. In this case, the gas exhausted from the arc extinguishing chamber 21 passes through the expansion cavity 13 and is discharged from the exhaust ports 14 on the base 11 and the cover plate 12.
[0059] This setting method only requires processing corresponding grooves on the base 11 and the cover plate 12. The grooves on the base 11 and the cover plate 12 are spliced to form the exhaust port 14, so as to reduce the processing difficulty of the exhaust port 14 and expand the maximum configurable size of the exhaust port 14, so as to facilitate the processing design of the exhaust port 14 and enable the exhaust port 14 to obtain a better exhaust effect.
[0060] In an optional embodiment, the arc extinguishing chamber 21 and the extension chamber 13 can be formed only by the cooperation of the base 11 and the cover plate 12, and a mechanical structure corresponding to the arc extinguishing chamber 21 and the extension chamber 13 needs to be provided on the cover plate 12 so that the arc extinguishing chamber 21 and the extension chamber 13 can obtain better sealing properties.
[0061] In the embodiment of the present application, the base 11 includes a main body portion 111 and a mounting portion 112 which are connected to each other, an arc extinguishing chamber 21 is formed between the main body portion 111 and the cover plate 12, and a locking clip 22 is installed on the mounting portion 112. It can be seen that the base 11 of the present application extends the mounting portion 112 on the basis of the main body portion 111, and the locking clip 22 is installed on the extended mounting portion 112, which will not occupy the space where the original arc extinguishing chamber 21 structure is located, and thus will not affect the original arc extinguishing chamber 21 structure. In addition, an expansion cavity 13 is formed between the mounting portion 112 and the cover plate 12, and the expansion cavity 13 is connected to the arc extinguishing chamber 21, and the cover plate 12 blocks the gap formed on the mounting portion 112, so that the space of the arc extinguishing chamber 21 is expanded, and the arc extinguishing chamber 21 has a larger arc extinguishing space, so that the arc extinguishing chamber 21 can obtain a better arc extinguishing effect, so as to improve the arc extinguishing performance of the arc extinguishing chamber 21.
[0062] Figure 6 A schematic diagram of the combined structure of a connecting member, a first baffle and a second baffle provided in an embodiment of the present application.
[0063] In one possible design, see Figure 3 , Figure 4 and Figure 6 The housing assembly 1 further includes a first baffle 15 , which blocks the installation gap 1121 and is located between the installation gap 1121 and the cover plate 12 , and the expansion cavity 13 is formed between the first baffle 15 , the installation portion 112 and the cover plate 12 .
[0064] The first baffle 15 shields the installation gap 1121, so that the expansion cavity 13 formed between the first baffle 15, the installation portion 112 and the cover plate 12 has good sealing performance. In addition, the first baffle 15 is provided to achieve the effect of shielding the installation gap 1121 without additionally providing a complex structure on the cover plate 12. Compared with the cover plate 12, the first baffle 15 has a simple structure and is easy to process, which is conducive to simplifying the processing technology of the housing assembly 1 and improving the production and processing efficiency of the housing assembly 1.
[0065] In an optional embodiment, the first baffle 15 is in contact with a side of the mounting portion 112 facing the cover plate 12 .
[0066] The arrangement in which the first baffle 15 contacts the side of the mounting portion 112 facing the cover plate 12 enables the first baffle 15 to form a good shielding effect on the mounting gap 1121, thereby improving the sealing of the expansion cavity 13. In addition, this arrangement further refines the setting position of the first baffle 15, which facilitates the installation and positioning of the first baffle 15, thereby improving the installation efficiency of the housing assembly 1. In an optional embodiment, the projection of the mounting gap 1121 in the first direction falls within the projection range of the first baffle 15 in the first direction. The covering direction of the base 11 and the cover plate 12 is consistent with the first direction.
[0067] This arrangement means that in the first direction, i.e., in the covering direction of the base 11 and the cover plate 12 , the installation gap 1121 is completely covered by the first baffle plate 15 , so that the first baffle plate 15 seals the installation gap 1121 to avoid the installation gap 1121 having a negative impact on the sealing property of the expansion cavity 13 .
[0068] In one possible design, Figure 3 , Figure 4 and Figure 6 As shown, the housing assembly 1 further includes a second baffle 16 , which is located between the base 11 and the cover plate 12 , and the second baffle 16 blocks a side of the arc extinguishing chamber 21 close to the cover plate 12 .
[0069] The arc extinguishing chamber 21 has good sealing performance due to the shielding effect of the second baffle 15 on the side of the arc extinguishing chamber 21 close to the cover plate 12. In addition, the second baffle 16 is provided to achieve the effect of shielding the installation gap 1121 without additionally providing a complex structure on the cover plate 12. Compared with the cover plate 12, the second baffle 16 has a simple structure and is easy to process, which is conducive to simplifying the processing technology of the housing assembly 1 and improving the production and processing efficiency of the housing assembly 1.
[0070] In an optional embodiment, the second baffle 16 is in contact with a side of the arc extinguishing chamber 21 close to the cover plate 12 .
[0071] The arrangement in which the second baffle plate 16 contacts the side of the arc extinguishing chamber 21 close to the cover plate 12 enables the second baffle plate 16 to form a good shielding effect on the arc extinguishing chamber 21, thereby improving the sealing of the arc extinguishing chamber 21. In addition, this arrangement further refines the arrangement position of the second baffle plate 16, facilitates the installation and positioning of the second baffle plate 16, and improves the installation efficiency of the housing assembly 1.
[0072] In the present application, the first baffle 15 contacts a side of the mounting portion 112 facing the cover plate 12 , and the second baffle 16 contacts a side of the arc extinguishing chamber 21 close to the cover plate 12 .
[0073] In the case where the housing assembly 1 includes the first baffle 15 and the second baffle 16, only the first baffle 15 may be in contact with the side of the mounting portion 112 facing the cover plate 12, or only the second baffle 16 may be in contact with the side of the arc extinguishing chamber 21 close to the cover plate 12. It is also possible that the first baffle 15 is in contact with the side of the mounting portion 112 facing the cover plate 12, while the second baffle 16 is in contact with the side of the arc extinguishing chamber 21 close to the cover plate 12. The embodiment of the present application does not limit this. Among them, in the case where only the first baffle 15 is in contact with the side of the mounting portion 112 facing the cover plate 12, or only the second baffle 16 is in contact with the side of the arc extinguishing chamber 21 close to the cover plate 12, the installation gap 1121 and the arc extinguishing chamber 21 can be shielded and closed by other structural members in the housing assembly 1.
[0074] In an optional embodiment, the projection of the arc extinguishing chamber 21 in the first direction falls within the projection range of the second baffle 16 in the first direction. The covering direction of the base 11 and the cover plate 12 is consistent with the first direction.
[0075] This arrangement means that in the first direction, i.e., in the covering direction of the base 11 and the cover plate 12, the arc extinguishing chamber 21 is completely covered by the second baffle plate 16, so that the second baffle plate 16 seals the arc extinguishing chamber 21, and the second baffle plate 16 and the arc extinguishing chamber 21 together constitute a complete arc extinguishing chamber, so that the arc extinguishing chamber 21 can form a good closure.
[0076] In the present application, the projection of the installation gap 1121 in the first direction falls within the projection range of the first baffle 15 in the first direction, and the projection of the arc extinguishing chamber 21 in the first direction falls within the projection range of the second baffle 16 in the first direction. The covering direction of the base 11 and the cover plate 12 is consistent with the first direction.
[0077] This arrangement can maintain good sealing properties for the expansion chamber 13 and the arc extinguishing chamber 21 through the sealing effect of the first baffle 15 and the second baffle 16 , so that the housing assembly 1 as a whole can maintain good sealing properties.
[0078] In the case where the housing assembly 1 includes the first baffle 15 and the second baffle 16, only the projection of the installation gap 1121 in the first direction may fall within the projection range of the first baffle 15 in the first direction, or only the projection of the arc extinguishing chamber 21 in the first direction may fall within the projection range of the second baffle 16 in the first direction, or the projection of the installation gap 1121 in the first direction may fall within the projection range of the first baffle 15 in the first direction, and the projection of the arc extinguishing chamber 21 in the first direction may fall within the projection range of the second baffle 16 in the first direction, and the embodiment of the present application does not limit this. Among them, in the case where only the projection of the installation gap 1121 in the first direction falls within the projection range of the first baffle 15 in the first direction, or only the projection of the arc extinguishing chamber 21 in the first direction falls within the projection range of the second baffle 16 in the first direction, the installation gap 1121 and the arc extinguishing chamber 21 may be shielded and closed by other structural members in the housing assembly 1.
[0079] In one possible design, see Figure 4 and Figure 6 The housing assembly 1 further includes a connecting member 17, which is connected to the first baffle 15 and the second baffle 16. The connecting member 17 is located between the first baffle 15 and the cover plate 12 in the first direction, and the connecting member 17 is located between the second baffle 16 and the mounting portion 112 in the second direction. The first direction is perpendicular to the second direction, and the covering direction of the base 11 and the cover plate 12 is consistent with the first direction.
[0080] The connecting member 17 can form a good connection strength between the first baffle 15 and the second baffle 16, and the first baffle 15 and the second baffle 16 can be integrated. The integrated first baffle 15 and the second baffle 16 can simplify the processing technology of the housing assembly 1, and there is no need to install the first baffle 15 and the second baffle 16 in steps, which can simplify the installation process of the housing assembly 1.
[0081] In one possible design, Figure 4 and Figure 6As shown, the connecting member 17 includes a first sub-member 171 and a second sub-member 172 arranged at intervals, and the first sub-member 171 is closer to the exhaust port 14 than the second sub-member 172. The first sub-member 171 is connected to the first baffle 15 on one side in the first direction, and the first sub-member 171 has a through hole 18 between at least part of the other side in the first direction and the cover plate 12, and the gas in the expansion chamber 13 is discharged to the exhaust port 14 through the through hole 18. The second sub-member 172 is connected to the first baffle 15 on one side in the first direction, and the second sub-member 172 is abutted against the cover plate 12 on the other side in the first direction.
[0082] The specific forms of the first sub-component 171 and the second sub-component 172 can be columnar, sheet-like, strip-like, polyhedral, etc. On the premise that the first sub-component 171 and the second sub-component 172 can achieve the corresponding shielding and blocking functions, the embodiment of the present application does not limit the specific forms of the first sub-component 171 and the second sub-component 172.
[0083] In the case where the first sub-component 171 has a through hole 18 between at least part of the other side in the first direction and the cover plate 12, there are various implementation forms of the through hole 18. In one embodiment, only the first sub-component 171 may be provided with the through hole 18. In this case, when the gas discharged from the arc extinguishing chamber 21 passes through the expansion cavity 13, it first passes through the through hole 18 on the first sub-component 171 and then is discharged from the exhaust port 14.
[0084] In another optional embodiment, only the cover plate 12 may be provided with the through hole 18. In this case, when the gas discharged from the arc extinguishing chamber 21 passes through the expansion cavity 13, it first passes through the through hole 18 on the cover plate 12 and then is discharged from the exhaust port 14.
[0085] In yet another alternative embodiment, Figure 4 As shown, the first sub-component 171 and the cover plate 12 may both be provided with a through hole 18. Specifically, a portion of the through hole 18 is provided on the first sub-component 171, and another portion of the through hole 18 is provided on the cover plate 12. In this case, when the gas discharged from the arc extinguishing chamber 21 passes through the expansion cavity 13, it first passes through the through holes 18 on the first sub-component 171 and the cover plate 12, and then is discharged from the exhaust port 14.
[0086] The arrangement of the through hole 18 between at least part of the other side of the first sub-component 171 in the first direction and the cover plate 12 can play a buffering role, block metal splashes, reduce the flow rate of the gas after arc extinguishing in the expansion chamber 13, and reduce its energy. In addition, the second sub-component 172 is connected to the first baffle 15 on one side in the first direction, and the arrangement of the second sub-component 172 abutting against the cover plate 12 on the other side in the first direction enables the second sub-component 172 to block the side wall of the expansion chamber 13 to improve the sealing performance of the expansion chamber 13.
[0087] In an optional embodiment, the first baffle 15, the second baffle 16, the first sub-component 171 and the second sub-component 172 can be detachably connected by different connection forms such as threaded connection and clamping, or by connection processes such as gluing, welding, and one-piece molding.
[0088] The first baffle 15, the second baffle 16, the first sub-component 171 and the second sub-component 172 in the present application can be integrally formed into one component, and this design form can simplify the processing technology and facilitate installation and application. In addition, the integral molding processing technology can facilitate the storage and use of the first baffle 15, the second baffle 16, the first sub-component 171 and the second sub-component 172, and the processing technology can reduce the processing difficulty, reduce the processing cost, and improve the production efficiency.
[0089] In a possible design, a sealing groove is provided on one side of the arc extinguishing chamber 21 close to the second sub-component 172, a sealing protrusion corresponding to the sealing groove is provided on the second sub-component 172, and the sealing protrusion is engaged with the sealing groove. Alternatively, a sealing protrusion is provided on one side of the arc extinguishing chamber 21 close to the second sub-component 172, a sealing groove corresponding to the sealing protrusion is provided on the second sub-component 172, and the sealing protrusion is engaged with the sealing groove.
[0090] The sealing groove and the sealing protrusion can improve the sealing between the arc extinguishing chamber 21 and the second sub-component 172 , thereby improving the sealing of the arc extinguishing chamber 21 to improve the arc extinguishing performance of the arc extinguishing chamber 21 .
[0091] In one possible design, see Figure 5 The mounting portion 112 is provided with a mounting groove 1122, and the locking clip 22 is inserted into the mounting groove 1122. The mounting groove 1122 can facilitate the installation and positioning of the locking clip 22, so as to improve the installation efficiency of the locking clip 22.
Claims
1. A housing assembly, applied to a circuit breaker, the circuit breaker comprising an arc extinguishing chamber and a locking clip, characterized in that: The housing assembly comprises a base and a cover plate covering each other; The base comprises a main body portion and a mounting portion connected to each other, and the arc extinguishing chamber is formed between the main body portion and the cover plate; The locking clip is mounted on the mounting portion, and a mounting gap is formed on the mounting portion; the cover plate can cover the mounting gap, and an expansion cavity is formed between the mounting portion and the cover plate, and the expansion cavity is communicated with the arc extinguishing chamber; The base and / or the cover plate are provided with an exhaust port, and the gas exhausted from the arc extinguishing chamber passes through the expansion cavity and is discharged from the exhaust port.
2. The housing assembly according to claim 1, characterized in that: It also includes a first baffle plate, which blocks the installation gap and is located between the installation gap and the cover plate. The expansion cavity is formed between the first baffle plate, the installation portion and the cover plate.
3. The housing assembly according to claim 2, characterized in that: It also includes a second baffle, which is located between the base and the cover plate, and blocks a side of the arc extinguishing chamber close to the cover plate.
4. The housing assembly according to claim 3, characterized in that: The first baffle is in contact with a side of the mounting portion facing the cover plate; And / or, the second baffle is in contact with a side of the arc extinguishing chamber close to the cover plate.
5. The housing assembly according to claim 3, characterized in that: The projection of the installation gap in the first direction falls within the projection range of the first baffle in the first direction; And / or, the projection of the arc extinguishing chamber in the first direction falls within the projection range of the second baffle in the first direction; Wherein, the covering direction of the base and the cover is consistent with the first direction.
6. The housing assembly according to claim 3, characterized in that: The housing assembly further includes a connecting member, wherein the connecting member is connected to the first baffle plate and the second baffle plate; The connecting member is located between the first baffle and the cover in the first direction, and between the second baffle and the mounting portion in the second direction. The first direction is perpendicular to the second direction, and the covering direction of the base and the cover is consistent with the first direction.
7. The housing assembly according to claim 6, characterized in that: The connecting member includes a first sub-member and a second sub-member arranged at an interval, and the first sub-member is closer to the exhaust port than the second sub-member; One side of the first sub-component in the first direction is connected to the first baffle plate, and at least part of the other side of the first sub-component in the first direction has a through hole between the first sub-component and the cover plate, and the arc in the expansion cavity is discharged to the exhaust port through the through hole; One side of the second sub-component in the first direction is connected to the first baffle plate, and the other side of the second sub-component in the first direction is abutted against the cover plate.
8. The housing assembly according to claim 7, characterized in that: A sealing groove is provided on one side of the arc extinguishing chamber close to the second sub-component, and a sealing protrusion corresponding to the sealing groove is provided on the second sub-component, and the sealing protrusion is clamped with the sealing groove; Alternatively, a sealing protrusion is provided on one side of the arc extinguishing chamber close to the second sub-component, a sealing groove corresponding to the sealing protrusion is provided on the second sub-component, and the sealing protrusion is clamped with the sealing groove.
9. The housing assembly according to claim 1, characterized in that: The mounting portion is provided with a mounting groove, and the locking clip is inserted into the mounting groove.
10. A circuit breaker, characterized in that: The invention comprises two locking clips and a housing assembly as claimed in any one of claims 1 to 9, wherein the locking clips are mounted on the housing assembly.