Arc extinguishing structure with turbulent flow function

Abstract

An arc extinguishing structure with a turbulent flow function comprises a shell with an air outlet and an arc extinguishing assembly formed by combining a plurality of arc extinguishing grid sheets, and the arc extinguishing assembly is installed in the shell. The arc passes through the airflow channels among the arc extinguishing grids from one side, close to the separation position of the moving contact and the static contact, of the arc extinguishing grids, and then leaves the arc extinguishing assembly from one side, far away from the separation position of the moving contact and the static contact, of the arc extinguishing grids. And spoilers are arranged at corresponding positions at inlets or / and outlets of the airflow channels among the plurality of arc extinguishing grid sheets. The arc extinguishing structure can effectively weaken the eddy current effect at the inlet and the outlet of the arc extinguishing grid sheet, so that the arc can be quickly transferred into the arc extinguishing chamber, and the arc extinguishing arc voltage is increased at the same time.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, specifically relating to an arc-extinguishing structure with a disturbance function. Background Technology

[0002] With the increasing voltage levels in new energy systems, circuit breakers face higher voltage breaking requirements. As power supply voltage rises, it becomes necessary to gradually increase the number of arc-extinguishing plates in the arc-extinguishing chamber to enhance its arc-extinguishing capacity. Simultaneously, the arc-extinguishing plates are arranged in a staggered pattern to increase the spacing between them, thus achieving higher breaking capacity. However, this arc-extinguishing plate arrangement has the following drawbacks: Figure 1 As shown, for staggered grids or inclined arc-shaped structures, high-speed airflow generates vortices at the grid inlet, hindering the arc from entering the arc-extinguishing chamber and being cut by the grids; for example... Figure 2 As shown in Figure 3, when the high-speed airflow exits from the arc-extinguishing chamber towards the outlet, the asynchronous arc movement causes a large amount of eddy currents to be generated in the region at the end of the arc-extinguishing grid, which obstructs the forward movement of the arc within the arc-extinguishing chamber. Similarly, as shown in Figure 3, when the air passage suddenly narrows, eddy currents are also generated, preventing the arc from entering the arc-extinguishing grid, resulting in low utilization of the arc-extinguishing grid. Furthermore, as... Figure 4 As shown, when the air passage space behind the arc-extinguishing grid increases, although the eddy current phenomenon can be improved by adding a stiffener structure, the arc is difficult to "stay" in the arc-extinguishing grid after it enters it quickly, which makes it easy for the arc to short-circuit behind the arc-extinguishing grid. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing circuit breaker arc-extinguishing chambers, especially those for high-voltage circuit breakers, where eddy currents at the inlet or outlet of the arc-extinguishing grid increase the difficulty of extinguishing the arc. This invention provides an arc-extinguishing structure with a turbulence function, which can effectively weaken the eddy current effect at the inlet and outlet of the arc-extinguishing grid, allowing the arc to quickly transfer into the arc-extinguishing chamber, while increasing the arc voltage.

[0004] Technical solution

[0005] To achieve the above-mentioned technical objectives, this utility model provides an arc-extinguishing structure with a turbulence function, comprising a shell with an air outlet, and an arc-extinguishing assembly formed by assemblies of several arc-extinguishing grids. The arc-extinguishing assembly is installed inside the shell. The electric arc exits the arc-extinguishing assembly from the side of the several arc-extinguishing grids near the separation position of the moving contact and the stationary contact, through the airflow channel between the several arc-extinguishing grids, and from the side away from the separation position of the moving contact and the stationary contact. The characteristic feature is that turbulence elements are provided at corresponding positions at the inlet and / or outlet of the airflow channel between the several arc-extinguishing grids.

[0006] In one of the embodiments, the plurality of arc-extinguishing blades are staggered in front and back directions from the arc inlet direction of the shell to the arc outlet direction of the shell.

[0007] In one of the embodiments, when the flow disturbing member is located at the inlet of the airflow passage, the flow disturbing member is located in front of the end side of one arc-extinguishing blade between two adjacent arc-extinguishing blades in the plurality of arc-extinguishing blades staggered in front and back directions, and the two adjacent arc-extinguishing blades are closer to the separation position of the moving contact and the stationary contact.

[0008] In one of the embodiments, when the flow disturbing member is located at the outlet of the airflow passage, the flow disturbing member is located in front of the end side of one arc-extinguishing blade between two adjacent arc-extinguishing blades in the plurality of arc-extinguishing blades staggered in front and back directions, and the two adjacent arc-extinguishing blades are farther away from the separation position of the moving contact and the stationary contact.

[0009] In one of the embodiments, the gas generating member is installed on the bottom of the shell at the separation position of the moving contact and the stationary contact to the arc-extinguishing assembly region.

[0010] In one of the embodiments, the plurality of arc-extinguishing blades are inserted into the gas generating member.

[0011] In one of the embodiments, the flow disturbing member is installed on the gas generating member.

[0012] In one of the embodiments, the flow disturbing member is gradually tapered from the contact direction to the arc-extinguishing chamber direction, or is cylindrical, elliptical, or streamlined.

[0013] In one of the embodiments, the flow disturbing member is made of a gas generating material to avoid arc back.

[0014] In one of the embodiments, when the flow disturbing member is made of a metal material for use in a multi-pole product, the flow disturbing members 3 connected to corresponding poles can form equipotential between the flow disturbing members on the corresponding poles, thereby avoiding asynchronous arcs. Advantages

[0015] The arc-extinguishing structure with the flow disturbing function comprises a shell provided with an air outlet, an arc-extinguishing assembly formed by a plurality of arc-extinguishing blades, the arc-extinguishing assembly is installed in the shell, an arc passes through an airflow passage between the plurality of arc-extinguishing blades from one side close to the separation position of a moving contact and a stationary contact to the arc-extinguishing assembly, and leaves the arc-extinguishing assembly from the other side far away from the separation position of the moving contact and the stationary contact, and a flow disturbing member is arranged at a corresponding position of the inlet and / or outlet of the airflow passage between the plurality of arc-extinguishing blades. The arc-extinguishing structure can effectively weaken the vortex effect at the inlet and outlet of the arc-extinguishing blades, so that the arc can be quickly transferred into the arc-extinguishing chamber, and the arc voltage is increased. BRIEF DESCRIPTION OF DRAWINGS

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Appendix Figure 1 This is a schematic diagram of the eddy current at the inlet of the staggered arc-extinguishing grid in the arc-extinguishing chamber in the prior art;

[0018] Appendix Figure 2 This is a schematic diagram of the eddy currents in the staggered arc-extinguishing grid spacing region of the arc-extinguishing chamber in the prior art;

[0019] Appendix Figure 3a This is a schematic diagram of the narrowing vortex in the air passage of the arc-extinguishing grid assembly in the existing technology. Figure 1 ;

[0020] Appendix Figure 3b This is a schematic diagram of the narrowing vortex in the air passage of the arc-extinguishing grid assembly in the existing technology. Figure 2 ;

[0021] Appendix Figure 4 This is a schematic diagram of the tail air passage structure of the arc-extinguishing grid assembly in the existing technology;

[0022] Appendix Figure 5a This is a schematic diagram of the turbulence-disrupting element arranged at the inlet of the staggered arc-extinguishing grid plates in the arc-extinguishing chamber in this embodiment of the present invention;

[0023] Appendix Figure 5b This is a schematic diagram illustrating the function of the turbulence-generating component as a gas-generating component in this embodiment of the present invention;

[0024] Appendix Figure 5c This is a schematic diagram illustrating the asynchronous arc transfer situation in a multi-pole product according to an embodiment of this utility model;

[0025] Appendix Figure 5d This is a schematic diagram of the equipotential in the multi-pole product in the embodiments of this utility model;

[0026] Appendix Figure 6a This is a schematic diagram showing that the flow-disrupting components in the multi-pole product of this utility model are not connected;

[0027] Appendix Figure 6b This is a schematic diagram of the connection of the turbulence-disrupting components in the multi-pole product in this utility model embodiment;

[0028] Appendix Figure 7 This is a schematic diagram of the baffles arranged at the outlet of the staggered arc-extinguishing grid in the arc-extinguishing chamber in this embodiment of the present invention;

[0029] Appendix Figure 8is a schematic diagram of the arrangement of the flow disturbing member at the outlet of the staggered arc extinguishing grid piece of the arc extinguishing chamber in the embodiment of the utility model;

[0030] attached Figure 9a is a schematic diagram of the cylindrical flow disturbing member in the embodiment of the utility model;

[0031] attached Figure 9b is a schematic diagram of the elliptical flow disturbing member in the embodiment of the utility model;

[0032] attached Figure 9c is a schematic diagram of the streamline flow disturbing member in the embodiment of the utility model;

[0033] attached Figure 10a is a schematic diagram of the arrangement of the flow disturbing member on the inner side of the shell air outlet in the embodiment of the utility model Figure 1 ;

[0034] attached Figure 10b is a schematic diagram of the arrangement of the flow disturbing member on the inner side of the shell air outlet in the embodiment of the utility model Figure 2 ;

[0035] attached Figure 10c is a schematic diagram of the arrangement of the flow disturbing member on the inner side of the shell air outlet in the embodiment of the utility model DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely explained in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in the specification of the present application are for the purpose of illustration only, and do not indicate the only implementation.

[0038] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0039] In the present application, unless otherwise explicitly specified and limited, the first feature is "on", "under" the second feature, which can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature, which can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature is "below", "under" and "under" the second feature, which can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0040] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items. Embodiments

[0041] As shown in the accompanying Figure 5a A arc-extinguishing structure with turbulence function, comprising a shell 1 provided with an air outlet, a plurality of arc-extinguishing blades 201 combined to form an arc-extinguishing assembly 2, the arc-extinguishing assembly 2 is installed in the shell 1, the arc k passes through the airflow passage a between the plurality of arc-extinguishing blades 201 from the side close to the separation position of the moving contact 5 and the static contact 6 to the side away from the separation position of the moving contact 5 and the static contact 6, and then exits the arc-extinguishing assembly 2, as shown in the accompanying Figure 5a Or 7, the entrance m and / or exit n of the airflow passage a between the plurality of arc-extinguishing blades 201 is provided with a turbulence member 3 at the corresponding position. The plurality of arc-extinguishing blades 201 are staggered from the arc entrance direction of the shell 1 to the arc k air outlet direction of the shell 1. The gas generating member 4 is installed at the bottom of the shell 1 at the separation position of the moving contact 5 and the static contact 6 to the arc-extinguishing assembly 2 region. The plurality of arc-extinguishing blades 201 are inserted into the gas generating member 4. The turbulence member 3 is preferably installed on the gas generating member 4.

[0042] As shown in the accompanying Figure 5a When the turbulence member 3 is located at the entrance of the airflow passage a, the turbulence member 3 is located in front of the end side of one of the plurality of arc-extinguishing blades 201 which are staggered and adjacent to each other, and the distance between the arc-extinguishing blades and the separation position of the moving contact 5 and the static contact 6 is closer, the turbulence member 3 can break the vortex resistance at the entrance of the airflow passage a, promote the arc k to enter the arc-extinguishing chamber smoothly and be cut by the blades, thereby shortening the arc voltage rising time and reducing the energy in the arc voltage rising stage. In actual application, as shown in the accompanying Figure 5bAs shown, the spoiler 3 is a gas generating material to avoid arc back-off. In addition, as shown in the attached Figure 5c and 5d As shown, when the spoiler 3 is a metal material for use in a multi-pole product, connecting the spoilers 3 of the corresponding poles can form equipotential between the spoilers on the corresponding poles to avoid asynchronous arc. The principle is as shown in the attached Figure 6a and 6b As shown, when the arc is asynchronous, the potential of the A-pole static contact E1> the potential of the A-pole spoiler E2> the potential of the moving contact E3> the potential of the B-pole spoiler E4> the potential of the B-pole static contact E5, if the spoilers are connected, E2=E4, the B-pole electric field strength is enhanced, and the arc transfer is easy to synchronize. The specific process is as shown in the attached Figure 5c and 5d As shown, when the A-pole arc of the product is faster than the B-pole arc of the product, the B-pole moving end arc root can quickly jump to the arc plate by connecting the spoilers of the A-pole of the product and the spoilers of the B-pole of the product, which can avoid the asynchronous arc phenomenon.

[0043] As shown in the attached Figure 7 and 8 As shown, when the spoiler 3 is located at the outlet of the airflow passage a, the spoiler 1 is located at the front side of the end side of the arc-extinguishing grid piece between the two adjacent arc-extinguishing grid pieces, and the distance between the moving contact 5 and the static contact 6 is far apart. The spoiler 3 located at the outlet of the airflow passage a can suppress the vortex phenomenon at the end of the grid piece, so that the arc can smoothly enter the arc-extinguishing chamber and continuously transfer to the end of the grid piece, thereby avoiding arc back-off. As shown in the attached Figure 7 As shown, for the narrowed airway, adding a spoiler structure at the tail can suppress the generation of vortex. As shown in the attached Figure 8 As shown, for the grid piece with a large airway space behind, increasing the spoiler structure can effectively avoid the arc transfer too fast to cause the back short circuit at the end of the grid piece, thereby achieving the pressure maintaining effect.

[0044] Further specifically, as shown in the attached Figure 9aAs shown in FIGS. 9a, 9b and 9c, the shape of the spoiler 3 is gradually narrowed from the contact direction to the arc-extinguishing chamber direction or is cylindrical or elliptical or streamlined. In detail, the spoiler 3 has a smooth and continuous profile, and the structural surface has no sharp corners or protrusions, and the curves and transition surfaces are uniform and smooth, thereby reducing the formation of eddy currents; for the streamlined and elliptical spoiler structure, the structure is a gradually narrowing structure, one end of which is sharp and the other end is relatively blunt, and the overall length is greater than the thickness. When the fluid flows through the spoiler structure, the surface can make the fluid flow as smoothly as possible along the surface of the object, avoiding the phenomenon of vortex or separation of the fluid on the surface of the object, which helps to reduce energy loss and reduce pressure loss. At the same time, as shown in FIGS. 10a, 10b and 10c, based on the different positions of the gas outlet of the shell, there are different arrangements of the spoiler structure.

[0045] The arc-extinguishing structure with a spoiler function in the embodiment comprises a shell 1 provided with a gas outlet 101, and an arc-extinguishing assembly 2 formed by a plurality of arc-extinguishing vanes 201, wherein the arc-extinguishing assembly 2 is installed in the shell 1, an arc passes through the airflow passage a between the plurality of arc-extinguishing vanes 201 from the side close to the separation position of the moving contact and the stationary contact to the side away from the separation position of the moving contact and the stationary contact, and the spoiler 3 is arranged at the corresponding position.

[0046] The arc-extinguishing structure can effectively weaken the vortex effect at the inlet and outlet of the arc-extinguishing vane, so that the arc can be quickly transferred into the arc-extinguishing chamber, and the arc pressure is increased.

[0047] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present application.

[0048] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An arc extinguishing structure with a turbulence function, comprising a shell (1) provided with an air outlet (101), an arc extinguishing assembly (2) formed by a plurality of arc extinguishing fins (201), the arc extinguishing assembly (2) being installed in the shell (1), an electric arc (K) passing through the airflow channel (a) between the plurality of arc extinguishing fins (201) from the side close to the separation position of a moving contact (5) and a stationary contact (6) to the side away from the separation position of the moving contact (5) and the stationary contact (6), characterized in that: The entrance (m) and / or the exit (n) of the airflow channel (a) between the arc extinguishing blades (201) are provided with a spoiler (3) at the corresponding position.

2. The arc extinguishing structure with the function of disturbing flow as claimed in claim 1, characterized in that: The arc extinguishing blades (201) are staggered in front and back from the entrance direction of the arc (K) of the shell (1) to the exit direction of the arc (K) of the shell (1).

3. The arc extinguishing structure with the function of disturbing flow as claimed in claim 1, characterized in that: When the spoiler (3) is located at the entrance of the airflow channel (a), the spoiler (3) is located in front of the end side of one arc extinguishing blade between the two adjacent arc extinguishing blades in the staggered arc extinguishing blades (201), which are closer to the separation position of the moving contact (5) and the static contact (6).

4. The arc extinguishing structure with the function of disturbing flow as claimed in claim 1, characterized in that: When the spoiler (3) is located at the exit of the airflow channel (a), the spoiler (3) is located in front of the end side of one arc extinguishing blade between the two adjacent arc extinguishing blades in the staggered arc extinguishing blades (201), which are farther away from the separation position of the moving contact (5) and the static contact (6).

5. The arc extinguishing structure with the function of disturbing flow as claimed in claim 1, characterized in that: The gas production member (4) is installed at the bottom of the shell (1) at the separation position of the moving contact (5) and the static contact (6) to the arc extinguishing assembly (2) area.

6. The arc extinguishing structure with the function of disturbing flow as claimed in claim 5, characterized in that: The arc extinguishing blades (201) are inserted into the gas production member (4).

7. The arc extinguishing structure with the function of disturbing flow as claimed in claim 6, characterized in that: The spoiler (3) is installed on the gas production member (4).

8. The arc extinguishing structure with the function of disturbing flow as claimed in claim 1, characterized in that: The shape of the spoiler (3) is gradually smaller from the contact direction to the arc extinguishing chamber direction, or cylindrical, or elliptical, or streamline.

9. The arc extinguishing structure with the function of disturbing flow as claimed in claim 1, characterized in that: The spoiler (3) is made of gas production material to avoid arc back.

10. The arc extinguishing structure with the function of disturbing flow as claimed in claim 1, characterized in that: When the spoiler (3) is made of metal material for multi-pole products, the spoilers (3) of the corresponding poles can form equipotential between the spoilers on the corresponding poles to avoid asynchronous arc.

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