Arc extinguishing assembly and low-voltage switch
By designing an arc extinguishing assembly containing an arc extinguishing chamber and an arc extinguishing assembly in the low-voltage switch, the problems of incomplete arc extinguishing and high airflow temperature are solved, and the complete arc extinguishing and reduction of airflow temperature are achieved, and external devices are protected.
Patent Information
- Application Number
- CN202420290147.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-08
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-02-08
AI Technical Summary
The arc extinguishing assembly in existing low-voltage switches is difficult to achieve complete extinguishing of the arc, and the exhausted airflow temperature is high, which affects the safety of external devices.
An arc extinguishing assembly is designed, including an arc extinguishing chamber and an arc extinguishing assembly. The arc extinguishing assembly forms a deceleration channel through a plurality of arrays of winding columns, extending the cooling time of the arc and achieving complete extinguishing of the arc.
The complete extinguishing of the arc is achieved, the airflow temperature discharged by the low-voltage switch is reduced, the devices outside the low-voltage switch are protected, and the adverse effects of arcing and high-temperature gases on the external devices are avoided.
Smart Images
Figure CN222637101U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to an arc extinguishing component and a low-voltage switch. Background Art
[0002] The electric arc is a high-temperature, highly conductive free gas. When the moving contact and the static contact are disconnected, an electric arc is generated, which not only has a great destructive effect on the contacts, but also prolongs the time to disconnect the circuit. In addition, due to the high temperature characteristics of the electric arc, the internal components of the switch will heat up quickly, which is not conducive to the safe use of the low-voltage switch. In the prior art, the arc extinguishing assembly currently usually uses an arc extinguishing chamber for arc extinguishing, which uses a plurality of grids arranged at intervals to divide the arc and achieves arc extinguishing by increasing the arc voltage. In actual use, the arc extinguishing chamber will still discharge a small amount of arc and high-temperature gas, which will have an adverse effect on the components outside the low-voltage switch. Utility Model Content
[0003] The purpose of the present application is to provide an arc extinguishing assembly and a low-voltage switch, which can completely extinguish the arc and effectively reduce the temperature of the air flow discharged by the low-voltage switch, thereby achieving reliable protection of components near the exhaust port of the low-voltage switch.
[0004] The embodiment of the present application is implemented as follows:
[0005] In the first aspect, an embodiment of the present application provides an arc extinguishing assembly, which is installed in the housing of a low-voltage switch, and the arc extinguishing assembly includes an arc extinguishing chamber and a current-circulating arc extinguishing assembly for decelerating a current-carrying fluid; the arc extinguishing chamber has an arc entry port and an arc exit port along the direction of movement of the current-carrying fluid, and the current-circulating arc extinguishing assembly includes a plurality of current-circulating columns arranged in an array on one side of the arc exit port, and an extension direction of the current-circulating columns intersects with the direction of movement of the current-carrying fluid, and at least two deceleration channels connected to the arc exit ports are formed by the current-circulating columns arranged in an array.
[0006] As an optional embodiment, there are at least two groups of the current-flowing rods arranged at intervals; the first group of the current-flowing rods are arranged at intervals on a first plane, and the second group of the current-flowing rods are arranged at intervals on a second plane, and the first plane is parallel to the second plane and intersects with the direction of movement of the charged fluid.
[0007] As an optional embodiment, there is a first air outlet between adjacent flow poles on the first plane, and a second air outlet between adjacent flow poles on the second plane; the first air outlet and the second air outlet are alternately arranged along the arrangement direction of the flow poles.
[0008] As an optional implementation, the flow column arranged on the second plane and / or on the side of the second plane away from the first plane is an arc-shaped plate, and the arc-shaped plate protrudes in a direction away from the arc outlet port.
[0009] As an optional embodiment, on the first plane, at least the flow columns close to both sides of the arc extinguishing chamber are arc-shaped plates, which protrude towards the arc outlet port, and the first plane is located between the second plane and the arc extinguishing chamber.
[0010] As an optional embodiment, the arc plate has a blocking arc surface on the side close to the arc outlet port, and the blocking arc surface is used to divert the current-carrying fluid and extend the movement path of the current-carrying fluid through the flow-by-flow arc extinguishing assembly; the arc plate has a guide arc surface on the side away from the arc outlet port, and the guide arc surface is used to shorten the movement path of the cooling airflow outside the shell through the flow-by-flow arc extinguishing assembly into the arc extinguishing chamber.
[0011] As an optional implementation, the flow column is a cylindrical structure or a prismatic structure.
[0012] As an optional implementation, the flow column is a plastic structure or a metal structure.
[0013] As an optional embodiment, the shell has a gas outlet on the side wall close to the current-circulating arc-extinguishing assembly, and the current-carrying fluid can pass through the arc-extinguishing chamber and the current-circulating arc-extinguishing assembly in sequence and then be discharged from the gas outlet.
[0014] As an optional embodiment, the side wall of the shell has a plurality of air outlets arranged at intervals, the arrangement direction of the air outlets intersects with the movement direction of the charged fluid, and the side wall of the shell is provided with a drainage structure between adjacent air outlets.
[0015] In the second aspect, an embodiment of the present application also provides a low-voltage switch, including a contact assembly and the above-mentioned arc extinguishing assembly, wherein the contact assembly has an arc starting portion, and the arc entry port of the arc extinguishing chamber is close to the arc starting portion; the arc extinguishing chamber and the static contact of the contact assembly are connected by an arc starting piece.
[0016] In a preferred embodiment of the present application, the arc extinguishing assembly includes an arc extinguishing chamber and a current-circling arc extinguishing assembly for decelerating a charged fluid; the arc extinguishing chamber has an arc inlet port and an arc outlet port along the direction of movement of the charged fluid, and the current-circling arc extinguishing assembly includes a plurality of current-circling columns arranged in an array on one side of the arc outlet port, and the extension direction of the current-circling columns intersects with the direction of movement of the charged fluid. There are at least two groups of the current-circling columns arranged at intervals; the first group of the current-circling columns are arranged at intervals on a first plane, and the second group of the current-circling columns are arranged at intervals on a second plane, and the first plane is parallel to the second plane and is spaced and perpendicular to the direction of movement of the charged fluid.
[0017] In the embodiment of the present application, there are first air outlets between adjacent flow posts on the first plane, and second air outlets between adjacent flow posts on the second plane; the first air outlets and the second air outlets are alternately arranged along the arrangement direction of the flow posts.
[0018] The beneficial effects of the embodiments of the present application include:
[0019] In the first aspect, the embodiment of the present application provides an arc extinguishing assembly, which is installed in the housing of a low-voltage switch, and the arc extinguishing assembly includes an arc extinguishing chamber and a flow-by-flow arc extinguishing assembly for decelerating a live fluid; the arc extinguishing chamber has an arc inlet port and an arc outlet port along the direction of movement of the live fluid, and the flow-by-flow arc extinguishing assembly of the embodiment of the present application includes a plurality of flow-by-flow columns arranged in an array on one side of the arc outlet port, and the extension direction of the flow-by-flow columns intersects with the direction of movement of the live fluid. The extension direction of the flow-by-flow columns of the embodiment of the present application intersects with the direction of movement of the live fluid, and can block and decelerate the live fluid, so that the movement path of the live fluid is increased, thereby extending the cooling time of the live fluid in the arc extinguishing chamber, and achieving the technical effects of cooling and zero arcing through the flow-by-flow form.
[0020] In the second aspect, the embodiment of the present application further provides a low-voltage switch, including a contact assembly and the above-mentioned arc extinguishing assembly, wherein the contact assembly has an arc starting portion, and the arc entry port of the arc extinguishing chamber is close to the arc starting portion; the arc extinguishing chamber and the static contact of the contact assembly are connected by an arc-starting piece. In the embodiment of the present application, the arc entry port of the arc extinguishing chamber is close to the arc starting portion, so that the arc generated by the contact assembly can quickly enter the arc extinguishing chamber for arc extinguishing. Since the arc extinguishing assembly is arranged at the arc outlet port, the arc can prolong the cooling time of the charged fluid in the arc extinguishing chamber when passing through the arc extinguishing assembly, thereby enhancing the arc extinguishing effect, which is conducive to achieving zero arcing of the low-voltage switch. Therefore, adverse effects on devices outside the low-voltage switch can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, 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 present application 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 This is one of the structural schematic diagrams of the arc extinguishing assembly of the embodiment of the present application;
[0023] Figure 2 This is the second structural schematic diagram of the arc extinguishing assembly of the embodiment of the present application;
[0024] Figure 3 This is the third structural schematic diagram of the arc extinguishing assembly of the embodiment of the present application;
[0025] Figure 4 This is the fourth structural schematic diagram of the arc extinguishing assembly of the embodiment of the present application.
[0026] icon:
[0027] 100-arc extinguishing assembly; 101-housing; 102-arc extinguishing chamber; 103-circumferential arc extinguishing assembly; 104-direction of movement of current-carrying fluid; 105-arc inlet port; 106-arc outlet port; 107-circumferential current column; 108-extension direction of the circular current column; 109-first air outlet; 110-second air outlet; 111-arc plate; 112-blocking arc surface; 113-flow guiding arc surface; 114-cylindrical structural member; 115-air outlet; 116-flow guiding structure; 117-low-voltage switch; 118-contact assembly; 119-arcing portion; 120-arc striking plate. DETAILED DESCRIPTION
[0028] 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, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0030] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0031] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0032] The electric arc is a high-temperature, highly conductive free gas. When the moving contact and the static contact are disconnected, an electric arc is generated, which not only has a great destructive effect on the contacts, but also prolongs the time to disconnect the circuit. In addition, due to the high temperature characteristics of the electric arc, the internal components of the switch will heat up quickly, which is not conducive to the safe use of the low-voltage switch 117. In the prior art, the arc extinguishing assembly 100 currently usually uses an arc extinguishing chamber 102 to extinguish the arc, which uses a plurality of grids arranged at intervals to divide the arc and achieves arc extinguishing by increasing the arc voltage. In specific use, the arc extinguishing chamber 102 will still discharge a small amount of arcing and high-temperature gas, which will have an adverse effect on the components outside the low-voltage switch 117.
[0033] In order to solve the above technical problems, an embodiment of the present application provides an arc extinguishing assembly 100 and a low-voltage switch 117.
[0034] Reference Figure 1 and Figure 2 As shown, an embodiment of the present application provides an arc extinguishing assembly 100, which is installed in a housing 101 of a low-voltage switch 117. The arc extinguishing assembly 100 includes an arc extinguishing chamber 102 and a bypass arc extinguishing assembly 103 for decelerating a charged fluid; the arc extinguishing chamber 102 has an arc entry port 105 and an arc exit port 106 along a direction 104 in which the charged fluid moves, and the bypass arc extinguishing assembly 103 includes a plurality of bypass columns 107 arranged in an array on one side of the arc exit port 106, and an extension direction 108 of the bypass columns intersects with the direction 104 in which the charged fluid moves.
[0035] It should be noted that, in the embodiment of the present application, the array-arranged flow posts 107 form at least two deceleration channels connected to the arc outlet port 106. For example, three deceleration channels or four deceleration channels can be formed by staggered flow posts 107. There is no special limitation to this, and those skilled in the art can set it as needed.
[0036] It should be noted that the current conventional technology uses a perforated plate and a perforated mesh structure, or achieves arc extinguishing through an air flow channel.
[0037] The present application adopts an array arrangement of multiple flow columns 107 to extend the path of the airflow moving in the arc extinguishing chamber 102, thereby increasing the cooling time of the arc and achieving the purpose of simple structure and low manufacturing cost.
[0038] It should be noted that the extension direction of the current column 107 can intersect perpendicularly with the movement direction 104 of the charged fluid, so that the charged fluid can have a larger contact area with the current column 107, so that the current column 107 can divert and block the charged fluid, thereby facilitating the temperature control of the charged fluid.
[0039] An arc extinguishing assembly 100 provided in an embodiment of the present application is installed in a housing 101 of a low-voltage switch 117. The arc extinguishing assembly 100 includes an arc extinguishing chamber 102 and a flow-by-flow arc extinguishing assembly 103 for decelerating a live fluid; the arc extinguishing chamber 102 has an arc entry port 105 and an arc exit port 106 along a moving direction 104 of the live fluid, and the flow-by-flow arc extinguishing assembly 103 in the embodiment of the present application includes a plurality of flow-by-flow columns 107 arranged in an array on one side of the arc exit port 106, and an extension direction 108 of the flow-by-flow columns intersects with the moving direction 104 of the live fluid. The extension direction of the flow-by-flow columns 107 in the embodiment of the present application intersects with the moving direction 104 of the live fluid, and can block and decelerate the live fluid, so that the moving path of the live fluid is increased, thereby extending the cooling time of the live fluid in the arc extinguishing chamber 102, and achieving the technical effects of cooling and zero arcing through the flow-by-flow form.
[0040] Reference Figure 3 As shown, as an optional embodiment, there are at least two groups of spaced-apart current poles 107; the first group of current poles 107 are spaced-apart on a first plane, and the second group of current poles 107 are spaced-apart on a second plane, and the first plane is parallel to the second plane and intersects with the direction 104 of movement of the charged fluid.
[0041] The angle between the first plane and the moving direction 104 of the charged fluid can be 70° or 85°. Preferably, the first plane is parallel to and spaced from the second plane and intersects the moving direction 104 of the charged fluid at right angles.
[0042] Furthermore, there are first air outlets 109 between adjacent flow poles 107 on the first plane, and second air outlets 110 between adjacent flow poles 107 on the second plane; the first air outlets 109 and the second air outlets 110 are alternately arranged along the arrangement direction of the flow poles 107 .
[0043] The embodiment of the present application discloses a specific structure of the array arrangement of the flow posts 107, and by spacing and staggering at least two groups of the flow posts 107, the first gas outlets 109 and the second gas outlets 110 formed by adjacent flow posts 107 can be alternately arranged along the arrangement direction of the flow posts 107. When the charged fluid passes through the arc extinguishing chamber 102 and is discharged from the arc outlet port 106, it enters the first gas outlet 109, and the airflow guided by the first gas outlet 109 will hit the flow posts 107 along the moving direction, so that the fluid will be diverted on the flow posts 107 and enter the second gas outlets 110 on both sides of the flow posts 107.
[0044] It should be noted that there are at least two groups of current-carrying posts 107 arranged at intervals along the direction 104 of movement of the charged fluid. Exemplarily, there are three groups of current-carrying posts 107 arranged at intervals along the direction 104 of movement of the charged fluid, and the arrangement planes of the three groups of current-carrying posts 107 are parallel and spaced. Among them, the current-carrying posts 107 on each plane can be completely on a straight line, or they can have a certain offset and not be arranged on a straight line. It should be noted that the plane on which the current-carrying posts 107 are arranged at intervals can be replaced by an arc surface, so that the current-carrying posts 107 are arranged along an arc.
[0045] Among them, technicians in this field can make specific arrangements for the array of flow rods 107 according to needs, and no special limitations are made here.
[0046] As an optional implementation, the flow column 107 disposed on the second plane is an arc-shaped plate 111 , and the arc-shaped plate 111 protrudes in a direction away from the arc outlet port 106 .
[0047] Furthermore, the flow column 107 of the embodiment of the present application is an arc-shaped plate 111, and the arc-shaped plate 111 has arc surfaces on both sides that can guide the airflow.
[0048] Further, on the first plane, at least the flow columns 107 near the two sides of the arc extinguishing chamber 102 are arc-shaped plates 111, and the arc-shaped plates 111 protrude in the direction close to the arc outlet port 106. The first plane is located between the second plane and the arc extinguishing chamber, so that the charged fluid can quickly pass through the first air outlet 109 into the deceleration channel to achieve deceleration, cooling and deionization, which can effectively prevent the high-temperature fluid from staying between the arc extinguishing chamber 102 and the first plane for a long time. It should be noted that, further, the flow column 107 in the middle of the first plane can also adopt the arc-shaped plate 111. The arc-shaped plate 111 in the middle protrudes in the direction away from the arc outlet port 106.
[0049] Reference Figure 3 As shown, a protruding arc plate 111 in the direction away from the arc outlet port 106 has a blocking arc surface 112 on the side close to the arc outlet port 106, and the blocking arc surface 112 is used to divert the current-carrying fluid and extend the movement path of the current-carrying fluid through the bypass arc extinguishing component 103; the arc plate 111 has a guide arc surface 113 on the side away from the arc outlet port 106, and the guide arc surface 113 is used to shorten the movement path of the cooling airflow outside the shell 101 through the bypass arc extinguishing component 103 into the arc extinguishing chamber 102.
[0050] It should be noted that the embodiment of the present application can achieve the deceleration, cooling and deionization of the charged fluid by blocking the arc surface 112, so that all arcs in the airflow are extinguished and zero arcing is achieved. The setting of the guide arc surface 113 is conducive to the rapid flow of cold air outside the low-voltage switch 117 into the contact assembly 118 to reduce the temperature rise.
[0051] On the first plane, the embodiment of the present application can block the charged fluid for the first time through the blocking arc surface 112 of the arc plate 111, which can achieve deceleration and diversion, and then converge to the first outlet 109 to be discharged to the second plane, and the blocking arc surface 112 of the arc plate 111 on the second plane can block the charged fluid for the second time, and achieve deceleration and diversion again, so that the gas can be discharged from the second outlet 110. A multi-layer flow column 107 structure can be set by a technician in this field as needed.
[0052] When the external airflow passes through multiple groups of spaced-apart flow columns 107 and enters the arc extinguishing chamber 102, the guide arc surface 113 of the embodiment of the present application on the second plane can enable the airflow to quickly enter the second air outlet 110. After the diversion of the guide arc surface 113, the airflow quickly enters the second air outlet 110 and smoothly enters the arc extinguishing chamber 102 through the first air outlet 109.
[0053] That is to say, the array arrangement of the flow posts 107 provided in the embodiment of the present application has different effects on different airflow directions. When the charged fluid passes through multiple groups of spaced flow posts 107 and flows out to the outside, it will form a larger resistance and have a longer movement path, thereby improving the effect of cooling and extinguishing the arc of the charged fluid. When the external air flow passes through multiple groups of spaced flow posts 107, it will not form a large resistance, which can enable the air flow to quickly enter the arc extinguishing chamber 102 and cool the arc extinguishing chamber 102.
[0054] Reference Figure 4 As shown, as an optional embodiment, the flow column 107 is a cylindrical structure 114 or a prismatic structure.
[0055] Different from the above-mentioned embodiments, the flow rod 107 provided in the embodiment of the present application is a cylindrical structure 114 or a prismatic structure. It should be noted that those skilled in the art can set the specific structure of the flow rod 107 as required.
[0056] The flow column 107 is a plastic structure or a metal structure.
[0057] Exemplarily, the flow rod 107 is a metal structural member and can be fixed to the housing 101 by riveting or other connecting members. It should be noted that the metal structural member can be provided with a larger contact area, which is conducive to further improving the cooling capacity of the airflow.
[0058] Reference Figure 4 As shown, as an optional embodiment, the side wall of the shell 101 close to the arc extinguishing assembly 103 has an outlet 115, and the charged fluid can pass through the arc extinguishing chamber 102 and the arc extinguishing assembly 103 in sequence and then be discharged from the outlet 115.
[0059] Specifically, the side wall of the housing 101 has a plurality of air outlets 115 arranged at intervals, the arrangement direction of the air outlets 115 intersects with the moving direction 104 of the charged fluid, and the side wall of the housing 101 is provided with a drainage structure 116 between adjacent air outlets 115 .
[0060] In the embodiment of the present application, the airflow can be directed to the air outlet 115 by disposing the air guiding structure 116 , thereby facilitating the airflow to pass through the air outlet 115 .
[0061] The arc extinguishing chamber 102 includes a plurality of arc extinguishing grids arranged at intervals, each arc extinguishing grid is provided with at least one notch, and the notches between adjacent grids are arranged alternately, which is beneficial to reducing the resistance of the arc entering the arc extinguishing chamber 102 .
[0062] Reference Figure 4 As shown, the embodiment of the present application also provides a low-voltage switch 117, including a contact assembly 118 and the above-mentioned arc extinguishing assembly 100, the contact assembly 118 has an arc starting portion 119, and the arc entry port 105 of the arc extinguishing chamber 102 is close to the arc starting portion 119; the arc extinguishing chamber 102 and the static contact of the contact assembly 118 are connected by an arc starting piece 120.
[0063] In the embodiment of the present application, the arc entry port 105 of the arc extinguishing chamber 102 is placed close to the arc starting portion 119, so that the arc generated by the contact assembly 118 can quickly enter the arc extinguishing chamber 102 for arc extinguishing. Since the arc extinguishing assembly 103 is arranged at the arc exit port 106, the arc can extend the cooling time of the charged fluid in the arc extinguishing chamber 102 when passing through the arc extinguishing assembly 103, thereby enhancing the arc extinguishing effect. In addition, the arc extinguishing assembly 100 requires a small space, which is conducive to achieving zero arcing of the low-voltage switch 117 and further reducing the volume of the low-voltage switch 117. Therefore, adverse effects on devices outside the low-voltage switch 117 can be avoided.
[0064] In a preferred embodiment of the present application, the arc extinguishing assembly 100 comprises an arc extinguishing chamber 102 and a current-circling arc extinguishing assembly 103 for decelerating a charged fluid; the arc extinguishing chamber 102 has an arc inlet port 105 and an arc outlet port 106 along a direction 104 of movement of the charged fluid, and the current-circling arc extinguishing assembly 103 comprises a plurality of current-circling columns 107 arranged in an array on one side of the arc outlet port 106, and an extension direction 108 of the current-circling columns intersects with the direction 104 of movement of the charged fluid. There are at least two groups of current-circling columns 107 arranged at intervals; the first group of current-circling columns 107 are arranged at intervals on a first plane, and the second group of current-circling columns 107 are arranged at intervals on a second plane, and the first plane is parallel to the second plane and is spaced apart and perpendicular to the direction 104 of movement of the charged fluid.
[0065] In the embodiment of the present application, first air outlets 109 are provided between adjacent flow poles 107 on the first plane, and second air outlets 110 are provided between adjacent flow poles 107 on the second plane; the first air outlets 109 and the second air outlets 110 are arranged alternately along the arrangement direction of the flow poles 107 .
[0066] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. An arc extinguishing assembly, installed in the housing of a low-voltage switch, characterized in that: The arc extinguishing assembly includes an arc extinguishing chamber and a bypass arc extinguishing assembly for decelerating, cooling and eliminating the free flow of the live fluid; the arc extinguishing chamber has an arc entry port and an arc exit port along the direction of movement of the live fluid, and the bypass arc extinguishing assembly includes a plurality of bypass columns arranged in an array on one side of the arc exit port, wherein the extension direction of the bypass columns intersects with the direction of movement of the live fluid, and at least two deceleration channels connected to the arc exit port are formed by the array-arranged bypass columns.
2. The arc extinguishing assembly according to claim 1, characterized in that: There are at least two groups of the current-flowing rods arranged at intervals; the first group of the current-flowing rods are arranged at intervals on a first plane, and the second group of the current-flowing rods are arranged at intervals on a second plane, and the first plane is parallel to the second plane and intersects with the direction of movement of the charged fluid.
3. The arc extinguishing assembly according to claim 2, characterized in that: There are first air outlets between adjacent flow posts on the first plane, and there are second air outlets between adjacent flow posts on the second plane; the first air outlets and the second air outlets are alternately arranged along the arrangement direction of the flow posts.
4. The arc extinguishing assembly according to claim 2, characterized in that: The flow column arranged on the second plane and / or on the side of the second plane away from the first plane is an arc-shaped plate, and the arc-shaped plate protrudes in a direction away from the arc outlet port.
5. The arc extinguishing assembly according to claim 2, characterized in that: On the first plane, at least the flow columns close to both sides of the arc extinguishing chamber are arc-shaped plates, which protrude toward the arc outlet port. The first plane is located between the second plane and the arc extinguishing chamber.
6. The arc extinguishing assembly according to claim 4, characterized in that: The arc plate has a blocking arc surface on the side close to the arc outlet port, and the blocking arc surface is used to divert the current-carrying fluid and extend the movement path of the current-carrying fluid through the flow-by-flow arc extinguishing component; the arc plate has a guide arc surface on the side away from the arc outlet port, and the guide arc surface is used to shorten the movement path of the cooling airflow outside the shell through the flow-by-flow arc extinguishing component into the arc extinguishing chamber.
7. The arc extinguishing assembly according to claim 3, characterized in that: The flow column is a cylindrical structure or a prismatic structure.
8. The arc extinguishing assembly according to any one of claims 1 to 7, characterized in that: The flow column is a plastic structural part or a metal structural part, and the side wall of the shell close to the flow arc extinguishing assembly has an outlet. The current-carrying fluid can pass through the arc extinguishing chamber and the flow arc extinguishing assembly in sequence and then be discharged from the outlet.
9. The arc extinguishing assembly according to claim 8, characterized in that: The side wall of the shell is provided with a plurality of air outlets arranged at intervals, the arrangement direction of the air outlets intersects with the movement direction of the charged fluid, and the side wall of the shell is provided with a drainage structure between adjacent air outlets.
10. A low voltage switch, characterized in that: It comprises a contact assembly and the arc extinguishing assembly as claimed in any one of claims 1 to 9, wherein the contact assembly has an arc starting portion, and an arc entry port of an arc extinguishing chamber is close to the arc starting portion; the arc extinguishing chamber and the static contact of the contact assembly are connected via an arc starting piece.