Arc extinguish chamber and isolating switch

Abstract

The utility model provides an arc extinguishing chamber and an isolating switch, and relates to the technical field of arc extinguishing. The arc extinguishing chamber comprises a first arc extinguishing grid sheet group and a second arc extinguishing grid sheet group. And the first arc-extinguishing grid plate group is arranged along an arc-shaped path. The second arc extinguishing grid plate group is arranged close to the first arc extinguishing grid plate group and is arranged along a linear path; the linear path is tangent to the arc-shaped path. The disconnecting switch provided by the utility model adopts the above arc extinguish chamber. The arc extinguish chamber and the disconnecting switch provided by the utility model can improve the problem that the service life of the disconnecting switch is affected due to on-load power supply turn-off in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of arc extinguishing, in particular to an arc extinguishing chamber and an isolating switch. Background Art

[0002] Isolating switch is a kind of switch device mainly used for "isolating power supply, switching operation, connecting and disconnecting small current circuit". When the isolating switch is in the open position, there is an insulation distance that meets the specified requirements and an obvious disconnection mark between the contacts; when it is in the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions within a specified time.

[0003] As the operating voltage increases in usage scenarios, it is common for the isolating switch to shut off the current under load. However, the occurrence of this situation will cause more serious ablation on the life of the contacts, affecting the service life of the contacts, and thus affecting the service life of the isolating switch. Utility Model Content

[0004] The technical problem solved by the utility model is how to improve the problem in the prior art that the service life of the isolating switch is affected due to the power supply being turned off under load.

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

[0006] The utility model provides an arc extinguishing chamber, which is applied to an isolating switch, and the arc extinguishing chamber comprises:

[0007] A first arc-extinguishing grid group is arranged along an arc path;

[0008] The second arc-extinguishing grid plate group is arranged close to the first arc-extinguishing grid plate group and arranged along a straight path; the straight path is tangent to the arc path.

[0009] The beneficial effects of the arc extinguishing chamber provided by the utility model compared with the prior art include:

[0010] When the arc extinguishing chamber is applied to the disconnector, the arc generated when the disconnector is shut down under load is introduced into the arc extinguishing chamber. Since the arc extinguishing chamber adopts a layout design of two groups of two-stage arc extinguishing grids, namely the first arc extinguishing grid group and the second arc extinguishing grid group, and the second arc extinguishing grid group is arranged on the tangent path of the first arc extinguishing grid group, it is helpful for the first arc extinguishing grid group and the second arc extinguishing grid group to cut the arc, increase the voltage of the arc and allow the arc to quickly enter the arc extinguishing chamber, so that the arc can be quickly cut off, the residence time of the arc on the contact of the disconnector is reduced, and then the ablation is reduced, so as to achieve the purpose of increasing the life of the contact. Based on this, the arc extinguishing chamber can improve the problem of the service life of the disconnector being affected by shutting down the power supply under load in the prior art.

[0011] Optionally, the first arc-extinguishing grid plate group includes a plurality of long grid plates and a plurality of short grid plates, and the plurality of long grid plates and the plurality of short grid plates are alternately arranged.

[0012] Setting the first arc extinguishing grid group to be composed of a plurality of long grids and a plurality of short grids helps the first arc extinguishing grid group to cut the arc, thereby facilitating rapid arc extinguishing, reducing the time the arc stays on the contacts, and reducing the ablation of the contacts.

[0013] Optionally, one end of the plurality of long grid plates close to the center of the arc path is located on a first circular path, and one end of the plurality of short grid plates close to the center of the arc path is located on a second circular path, and the diameter of the first circular path is smaller than the diameter of the second circular path.

[0014] Short grids are arranged between adjacent long grids, and the distance between the end of the short grid close to the center of the arc path and the center of the arc path is made larger, which is beneficial to improving the arc blowing ability of the arc extinguishing chamber, so as to achieve rapid arc extinguishing and reduce the ablation of the contacts.

[0015] Optionally, one end of the plurality of long grid plates away from the center of the arc path is located on a third circular path, one end of the plurality of short grid plates away from the center of the arc path is located on a fourth circular path, and the diameter of the third circular path is greater than the diameter of the fourth circular path.

[0016] Arranging the ends of the long grid pieces away from the arc path and the ends of the short grid pieces away from the arc path on circular paths of different diameters can help improve the arc blowing capacity of the arc extinguishing chamber, complete rapid arc extinguishing, and thereby reduce the ablation of the contacts.

[0017] Optionally, the second arc-extinguishing grid group includes a plurality of arc-extinguishing grids, the plurality of arc-extinguishing grids are arranged along a straight path, and two ends of the plurality of arc-extinguishing grids are respectively located on two straight paths.

[0018] Arranging the multiple arc extinguishing grids in the second arc extinguishing grid group in a straight line can accelerate the arc fluid in the gap between two adjacent arc extinguishing grids faster, which is beneficial for the arc to quickly enter the arc extinguishing chamber under the action of air blowing at the initial stage of separation of the moving and static contacts.

[0019] Optionally, the arc extinguishing chamber further includes a first arc striking plate, and the first arc striking plate is arranged at an end of the second arc extinguishing grid plate group away from the first arc extinguishing grid plate group.

[0020] Placing the first arc-starting plate inside the arc-extinguishing chamber helps to improve space utilization.

[0021] Optionally, the arc extinguishing chamber further includes a second arc striking plate, and the second arc striking plate is arranged at an end of the first arc extinguishing grid plate group away from the second arc extinguishing grid plate group.

[0022] Optionally, the arc extinguishing chamber further includes a gas generating sheet, the first arc extinguishing grid sheet group and the second arc extinguishing grid sheet group are both connected to the gas generating sheet, and the gas generating sheet is arranged on the side of the first arc extinguishing grid sheet group close to the center of the arc path.

[0023] A disconnector comprises the above-mentioned arc extinguishing chamber.

[0024] Optionally, the disconnector includes two arc extinguishing chambers, and the two arc extinguishing chambers are arranged in a central symmetric manner with respect to the rotation center of the moving contact piece.

[0025] The isolating switch provided by the utility model adopts the above-mentioned arc extinguishing chamber. The beneficial effects of the isolating switch compared with the prior art are the same as the beneficial effects of the above-mentioned arc extinguishing chamber compared with the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of a partial structure of an isolating switch provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of the structure of the arc extinguishing chamber provided in an embodiment of the present application;

[0029] Figure 3 A schematic diagram of a partial structure of an arc extinguishing chamber provided in an embodiment of the present application;

[0030] Figure 4 This is a schematic structural diagram of the arc extinguishing chamber provided in an embodiment of the present application from another perspective.

[0031] Icon: 10-isolating switch; 11-arc extinguishing chamber; 100-first arc extinguishing grid group; 110-long grid; 120-short grid; 200-second arc extinguishing grid group; 210-arc extinguishing grid; 300-first arc-starting grid; 400-second arc-starting grid; 500-gas-generating grid. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the sheet groups of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0036] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0037] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0038] In the prior art, when the circuit is under load, the circuit is disconnected by the isolating switch 10, which may cause arc to seriously burn the contacts in the isolating switch 10, thereby reducing the service life of the contacts and further reducing the service life of the isolating switch 10. In order to improve the above technical problems, please refer to Figure 1 In an embodiment of the present application, an isolating switch 10 is provided, which can be connected to a circuit and can be used to disconnect the circuit. The isolating switch 10 can improve the problem in the prior art that the service life of the isolating switch 10 is affected by shutting off the power supply under load.

[0039] The isolating switch 10 includes a moving contact, a stationary contact and an arc extinguishing chamber 11. The moving contact is arranged in the isolating switch 10 in a rotating manner, and the stationary contact is arranged on the rotating path of the end of the moving contact. The arc extinguishing chamber 11 is arranged on an extension path of the rotating path of the end of the moving contact, and the arc generated when the moving contact and the stationary contact are separated can be introduced into the arc extinguishing chamber 11 to extinguish the arc. It is worth noting that the arc extinguishing chamber 11 can achieve rapid arc extinguishing, thereby reducing the time the arc stays on the contact, thereby reducing the ablation of the contact caused by the arc, and thus achieving the improvement of the problem of the service life of the isolating switch 10 being affected by the load-cutting power supply in the prior art. Based on this, the isolating switch 10 using the arc extinguishing chamber 11 can also improve the problem of the service life of the isolating switch 10 being affected by the load-cutting power supply in the prior art.

[0040] In this example, see Figure 2 , the arc extinguishing chamber 11 includes a first arc extinguishing grid group 100 and a second arc extinguishing grid group 200. The first arc extinguishing grid group 100 is arranged along an arc path. The second arc extinguishing grid group 200 is arranged close to the first arc extinguishing grid group 100 and arranged along a straight path; the straight path is tangent to the arc path. Among them, the arc path corresponding to the first arc extinguishing grid group 100 is arranged on the extension path of the rotation path of the end of the moving contact piece; and the second arc extinguishing grid group 200 is arranged at the end of the first arc extinguishing grid group 100 away from the moving contact piece. Based on this, when the moving contact piece and the stationary contact piece are separated, the generated arc can be quickly introduced into the arc extinguishing chamber 11 to achieve rapid arc extinguishing. Figure 2 The arrow A indicates the extension path of the second arc-extinguishing grid set 200 ; the arrow B indicates the circumferential path where the arc-shaped extension path of the first arc-extinguishing grid set 100 is located.

[0041] As described above, when the arc extinguishing chamber 11 is applied to the disconnector 10, the arc generated when the disconnector 10 is shut down under load is introduced into the arc extinguishing chamber 11. Since the arc extinguishing chamber 11 adopts a layout design of two groups of two-stage arc extinguishing grids 210, namely, the first arc extinguishing grid group 100 and the second arc extinguishing grid group 200, and the second arc extinguishing grid group 200 is arranged on the tangent path of the first arc extinguishing grid group 100, it is helpful for the first arc extinguishing grid group 100 and the second arc extinguishing grid group 200 to cut the arc, increase the voltage of the arc and allow the arc to quickly enter the arc extinguishing chamber 11, so that the arc can be quickly cut off, the arc residence time on the contact of the disconnector 10 is reduced, and the ablation is reduced, so as to achieve the purpose of increasing the contact life. Based on this, the arc extinguishing chamber 11 can improve the problem of the service life of the disconnector 10 being affected by shutting down the power supply under load in the prior art.

[0042] It is worth noting that in this embodiment, Figure 1Two arc extinguishing chambers 11 are provided in the disconnector 10, and the two ends of the moving contact piece correspond to the two arc extinguishing chambers 11 respectively; and the two arc extinguishing chambers 11 are centrally symmetrically arranged with the rotation center of the moving contact piece as the center point.

[0043] In this embodiment, please refer to Figure 3 and Figure 4 The first arc-extinguishing grid group 100 includes a plurality of long grids 110 and a plurality of short grids 120, and the plurality of long grids 110 and the plurality of short grids 120 are arranged in an interlaced manner. The interlaced arrangement means that a short grid 120 is arranged between any two adjacent long grids 110, and a long grid 110 is also arranged between any two adjacent short grids 120. The first arc-extinguishing grid group 100 is set as an arc-extinguishing grid group 210 composed of a plurality of long grids 110 and a plurality of short grids 120, which helps the first arc-extinguishing grid group 100 to cut the arc, thereby facilitating rapid arc extinguishing, reducing the time the arc stays on the contact, and reducing the ablation of the contact.

[0044] It should be understood that in other embodiments, the first arc-extinguishing grid set 100 may be arranged in other ways. For example, the first arc-extinguishing grid set 100 uses a plurality of grids of the same length arranged along an arc path.

[0045] Further, in this embodiment, one end of the plurality of long grid pieces 110 close to the center of the arc path is located in the first circumferential path, and one end of the plurality of short grid pieces 120 close to the center of the arc path is located in the second circumferential path, and the diameter of the first circumferential path is smaller than the diameter of the second circumferential path. In other words, the ends of the plurality of long grid pieces 110 and the plurality of short grid pieces 120 close to the center of the arc path are in an undulating state, that is, the distance between one end of the long grid piece 110 close to the center of the arc path and the center of the arc path is smaller. Based on this, the short grid piece 120 is arranged between adjacent long grid pieces 110, and the distance between the end of the short grid piece 120 close to the center of the arc path and the center of the arc path is larger, which is conducive to improving the arc blowing ability of the arc extinguishing chamber 11, so as to achieve rapid arc extinguishing and reduce the ablation of the contact.

[0046] Optionally, in this embodiment, one end of the plurality of long grids 110 away from the center of the arc path is located on the third circumferential path, and one end of the plurality of short grids 120 away from the center of the arc path is located on the fourth circumferential path, and the diameter of the third circumferential path is greater than the diameter of the fourth circumferential path. In other words, the end of the long grid 110 away from the center of the arc path and the end of the short grid 120 away from the center of the arc path are also arranged in an undulating shape. Arranging the end of the long grid 110 away from the arc path and the end of the short grid 120 away from the arc path on circumferential paths of different diameters can help improve the arc blowing ability of the arc extinguishing chamber 11, complete rapid arc extinguishing, and thereby reduce the ablation of the contact.

[0047] In this embodiment, the arrangement of the long grid piece 110 and the short grid piece 120 can also be regarded as that the short grid piece 120 is arranged in the area defined by the arc path formed by the two ends of the long grid piece 110. It should be understood that in other embodiments of the present application, the end of the long grid piece 110 away from the center of the arc path and the end of the short grid piece 120 away from the center of the arc path can also be located on the same circular path.

[0048] In addition, the second arc-extinguishing grid group 200 includes a plurality of arc-extinguishing grids 210, and the plurality of arc-extinguishing grids 210 are arranged along a straight path, and the two ends of the plurality of arc-extinguishing grids 210 are respectively located on two straight paths. The plurality of arc-extinguishing grids 210 in the second arc-extinguishing grid group 200 are arranged in a straight line, so that the arc fluid in the gap between two adjacent arc-extinguishing grids 210 can be accelerated more quickly, which is conducive to the arc being able to quickly enter the arc-extinguishing chamber 11 under the action of air blowing at the initial stage of separation of the moving and static contacts.

[0049] Among them, the straight path formed by the end of the multiple arc-extinguishing grids 210 on one side close to the center of the arc path is tangent to the arc path formed by the end of the multiple long grids 110 close to the center of the arc path, which can facilitate the arrangement of the multiple arc-extinguishing grids 210 and the long grids 110 and help improve space utilization.

[0050] In this embodiment, the arc extinguishing chamber 11 further comprises a first arc striking piece 300, which is arranged at one end of the second arc extinguishing grid group away from the first arc extinguishing grid group. Placing the first arc striking piece 300 inside the arc extinguishing chamber 11 helps to improve space utilization.

[0051] In addition, the arc extinguishing chamber 11 further includes a second arc striking piece 400 , which is disposed at one end of the first arc extinguishing grid piece group 100 away from the second arc extinguishing grid piece group 200 .

[0052] In this embodiment, the arc extinguishing chamber 11 further includes a gas generating sheet 500, and the first arc extinguishing grid sheet group 100 and the second arc extinguishing grid sheet group 200 are both connected to the gas generating sheet 500, and the gas generating sheet 500 is arranged on the side of the first arc extinguishing grid sheet group 100 close to the center of the arc path. The gas generating sheet 500 is made of a gas generating material, and the gas generating material will generate gas under high temperature, which can accelerate the flow of the arc and increase the probability of the arc contacting the first arc extinguishing grid sheet group 100 and the second arc extinguishing grid sheet group 200, thereby increasing the probability of the first arc extinguishing grid sheet group 100 and the second arc extinguishing grid sheet group 200 cutting the arc, thereby improving the arc extinguishing effect.

[0053] In summary, in the arc extinguishing chamber 11 and the disconnector 10 provided in the embodiment of the present application, since the arc extinguishing chamber 11 adopts a layout design of two groups of two-stage arc extinguishing grids 210, namely, the first arc extinguishing grid group 100 and the second arc extinguishing grid group 200, and the second arc extinguishing grid group 200 is arranged on the tangent path of the first arc extinguishing grid group 100, it is helpful for the first arc extinguishing grid group 100 and the second arc extinguishing grid group 200 to cut the arc, increase the voltage of the arc and allow the arc to quickly enter the arc extinguishing chamber 11, so that the arc can be quickly cut off, the residence time of the arc on the contact of the disconnector 10 is reduced, and then the ablation is reduced, so as to achieve the purpose of increasing the life of the contact. Based on this, the arc extinguishing chamber 11 can improve the problem of the service life of the disconnector 10 being affected by the load-on power off in the prior art. In addition, since the first arc extinguishing grid group 100 is arranged in a staggered manner with long grids 110 and short grids 120, it is helpful for the first arc extinguishing grid group 100 to cut the arc, which is beneficial for rapid arc extinguishing, reducing the time the arc stays on the contact and reducing the ablation of the contact.

[0054] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An arc extinguishing chamber, applied to a disconnector, characterized in that: The arc extinguishing chamber comprises: A first arc-extinguishing grid group is arranged along an arc path; The second arc-extinguishing grid plate group is arranged close to the first arc-extinguishing grid plate group and arranged along a straight path; the straight path is tangent to the arc path.

2. The arc extinguishing chamber according to claim 1, characterized in that: The first arc-extinguishing grid plate group includes a plurality of long grid plates and a plurality of short grid plates, and the plurality of long grid plates and the plurality of short grid plates are arranged alternately.

3. The arc extinguishing chamber according to claim 2, characterized in that: One end of the plurality of long grid plates close to the center of the arc path is located on a first circular path, and one end of the plurality of short grid plates close to the center of the arc path is located on a second circular path, and the diameter of the first circular path is smaller than the diameter of the second circular path.

4. The arc extinguishing chamber according to claim 3, characterized in that: One end of the plurality of long grid pieces away from the center of the arc path is located on a third circular path, one end of the plurality of short grid pieces away from the center of the arc path is located on a fourth circular path, and the diameter of the third circular path is greater than the diameter of the fourth circular path.

5. The arc extinguishing chamber according to claim 1, characterized in that: The second arc-extinguishing grid group includes a plurality of arc-extinguishing grids, the plurality of arc-extinguishing grids are arranged along a straight path, and two ends of the plurality of arc-extinguishing grids are respectively located on two straight paths.

6. The arc extinguishing chamber according to any one of claims 1 to 5, characterized in that: The arc extinguishing chamber further comprises a first arc striking plate, and the first arc striking plate is arranged at an end of the second arc extinguishing grid plate group away from the first arc extinguishing grid plate group.

7. The arc extinguishing chamber according to claim 6, characterized in that: The arc extinguishing chamber further comprises a second arc striking plate, and the second arc striking plate is arranged at an end of the first arc extinguishing grid plate group away from the second arc extinguishing grid plate group.

8. The arc extinguishing chamber according to any one of claims 1 to 5, characterized in that: The arc extinguishing chamber further comprises a gas generating sheet, the first arc extinguishing grid sheet group and the second arc extinguishing grid sheet group are both connected to the gas generating sheet, and the gas generating sheet is arranged on one side of the first arc extinguishing grid sheet group close to the center of the arc path.

9. An isolating switch, characterized in that: Comprising an arc extinguishing chamber as claimed in any one of claims 1-8.

10. The isolating switch according to claim 9, characterized in that: The isolating switch comprises two arc extinguishing chambers, and the two arc extinguishing chambers are arranged in a central symmetric manner with respect to the rotation center of the moving contact piece.

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