Exhaust structure of isolating switch

Abstract

The utility model discloses an exhaust structure of an isolating switch, which comprises at least two switch unit layers, and each switch unit layer is provided with a shell. The switch unit layers are divided into odd-numbered layers and even-numbered layers; wherein at least one first exhaust port is formed in each odd layer of shell, at least one second exhaust port is formed in each even layer of shell, and the first exhaust ports and the second exhaust ports are in one-to-one correspondence; an included angle A is formed between the corresponding forming directions of the first exhaust port and the second exhaust port, and A is more than or equal to 15 degrees and less than or equal to 90 degrees; the exhaust valve has good exhaust performance.

Description

Technical Field

[0001] The utility model relates to a rotary disconnect switch, in particular to an exhaust structure of a disconnect switch. Background Art

[0002] For a rotary disconnect switch, an exhaust port is often provided on the housing. The exhaust port can discharge the gas inside the disconnect switch during the breaking process of the disconnect switch, so as to better achieve the arc extinguishing effect.

[0003] The existing disconnect switches often have many layers. The exhaust ports on the same side of all disconnect switches are basically arranged in a straight line. Therefore, the directions of the exhaust ports of adjacent two layers of disconnect switches are the same, which may cause the gas with charged arc ions ejected from the exhaust ports of adjacent two layers to gather together, which is not conducive to arc extinguishing. Summary of the Invention

[0004] In view of this, the purpose of the utility model is to overcome the deficiencies in the prior art, and aims to provide an exhaust structure of a disconnect switch, which has a better arc extinguishing effect.

[0005] The utility model provides an exhaust structure of a disconnect switch, which includes at least two layers of switch unit layers, and each layer of switch unit layer has a housing; the switch unit layers are divided into odd layers and even layers; wherein, at least one first exhaust port is opened on the housing of all odd layers, and at least one second exhaust port is opened on the housing of all even layers, and each first exhaust port corresponds to a second exhaust port; the opening directions of the corresponding first exhaust port and second exhaust port are arranged at an included angle A, and 15° ≤ A ≤ 90°.

[0006] In some embodiments of the present application, the housing of each switch unit layer includes two long side walls and two short side walls, and the two ends of the two long side walls are respectively connected by the two short side walls; the first exhaust port is opened on the short side wall of the housing of the odd layer, and is located at one end of the short side wall close to the long side wall.

[0007] In some embodiments of the present application, the housing of each switch unit layer includes two long side walls and two short side walls, and the two ends of the two long side walls are respectively connected by the two short side walls; the opening direction of the first exhaust port is perpendicular to the short side wall, the opening direction of the second exhaust port is perpendicular to the long side wall, and the corresponding first exhaust port and second exhaust port are concentrated at the corner position of the same orientation of the two housings, and the corner position refers to the position where one long side wall is connected to the short side wall.

[0008] In some embodiments of the present application, the housing of each switch unit layer includes two long side walls and two short side walls. The two ends of the two long side walls are respectively connected by the two short side walls; the two long side walls are respectively the second long side wall and the second long side wall, and a convex portion is provided on the short side wall. A transition inclined surface is connected between the second long side wall and the convex portion; the first exhaust port is opened on the convex portion, and the second exhaust port is opened on the transition inclined surface.

[0009] In some embodiments of the present application, there are two first exhaust ports on the housing of the odd-numbered layers, and the two first exhaust ports are mirror-symmetrically arranged; there are two second exhaust ports on the housing of the even-numbered layers, and the two second exhaust ports are mirror-symmetrically arranged.

[0010] In some embodiments of the present application, each layer of the switch unit layer further includes a first static contact and a welding foot. The first static contact is electrically connected to the welding foot, and the first static contact is arranged inside the housing; the two long side walls are respectively the first long side wall and the second long side wall, and the welding foot extends from the first long side wall to the outside of the housing; the first exhaust port and the second exhaust port are both arranged away from the first long side wall.

[0011] In some embodiments of the present application, each layer of the switch unit layer further includes a second static contact and a wiring part. The second static contact is electrically connected to the wiring part, and the second static contact is arranged inside the housing; at least part of the wiring part is exposed outside the second long side wall, and a wiring screw is arranged on the wiring part; the wiring parts of all the switch unit layers are on an imaginary straight line, and a partition part protruding towards the outside of the housing is further provided on the second long side wall, and the partition part separates two adjacent wiring parts.

[0012] In some embodiments of the present application, a first exhaust channel is further provided on the housing of the odd-numbered layers, and the first exhaust port is communicated with the first exhaust channel; a second exhaust channel is further provided on the housing of the even-numbered layers, and the second exhaust port is communicated with the second exhaust channel; arc extinguishing parts are arranged at the positions where the first exhaust channel is close to the first exhaust port and where the second exhaust channel is close to the second exhaust port; the arc extinguishing part is a perforated metal plate or the arc extinguishing part is a metal braid.

[0013] In some embodiments of the present application, a first exhaust channel is further provided on the housing of the odd-numbered layers, and the first exhaust port is communicated with the first exhaust channel; a second exhaust channel is further provided on the housing of the even-numbered layers, and the second exhaust port is communicated with the second exhaust channel; a Laval nozzle is formed at the connection between the first exhaust channel and the first exhaust port, and a Laval nozzle is formed at the connection between the second exhaust channel and the second exhaust port.

[0014] In some embodiments of the present application, a first exhaust channel is further provided on the odd-numbered layer shell, and the first exhaust port is connected to the first exhaust channel; a second exhaust channel is also provided on the even-numbered layer shell, and the second exhaust port is connected to the second exhaust channel; arc extinguishing chambers are provided in both the odd-numbered layer shell and the even-numbered layer shell, at least two first partition walls are provided between the arc extinguishing chamber and the short side wall of the odd-numbered layer shell, and at least two second partition walls are provided between the arc extinguishing chamber and the short side wall of the even-numbered layer shell; the gap between two adjacent first partition walls and the gap between the first partition wall and the short side wall are both part of the first exhaust channel; the gap between two adjacent second partition walls and the gap between the second partition wall and the short side wall are both part of the second exhaust channel.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] By adopting the arrangement that the exhaust ports of the odd-numbered layers and the exhaust ports of the even-numbered layers are opened in different directions (specifically at an angle between 15° and 90°), the directions of the arc gases discharged from the two adjacent switch unit layers can be made different as much as possible, thereby avoiding excessive concentration of the arc gases, achieving good exhaust effects and indirectly improving the arc extinguishing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 creative work.

[0018] Figure 1 A schematic diagram of an isolating switch according to an embodiment of the utility model is shown;

[0019] Figure 2 A schematic diagram of an odd-numbered switching unit layer in an embodiment of the present utility model is shown;

[0020] Figure 3 A schematic diagram showing an even-numbered layer of switch unit layers in an embodiment of the present utility model is shown;

[0021] Figure 4 A rear view of the isolating switch according to an embodiment of the utility model is shown;

[0022] Figure 5 A front view of an isolating switch according to an embodiment of the utility model is shown;

[0023] Figure 6 A schematic diagram of an odd-numbered switching unit layer and an even-numbered switching unit layer in an embodiment of the present utility model is shown. DETAILED DESCRIPTION

[0024] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals designate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 thus should not be construed as limiting the present utility model.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0027] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integral; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature. Embodiment

[0029] As Figure 1-6 shown, an embodiment of the present utility model is a rotary disconnect switch. This rotary disconnect switch includes an operating unit layer 100 and a switch unit layer 200. The operating unit layer 100 has an operating mechanism, and the switch unit layer 200 has a moving contact disc, a static contact, and an arc extinguishing structure. The rotation of the moving contact disc can be realized through the operating mechanism, so as to realize the connection and disconnection of the switch unit layer 200, and the arc extinguishing structure is used to achieve the arc extinguishing effect during disconnection.

[0030] This switch unit layer 200 is divided into an odd layer S1 and an even layer S2. Here, odd and even refer to odd and even numbers in the mathematical sense. The settings inside all the odd-layer S1 switch unit layers 200 are the same, and the settings inside all the even-layer S2 switch unit layers 200 are also the same. The odd-layer S1 switch unit layer 200 and the even-layer S2 switch unit layer 200 are basically the same in structure except for the differences in the exhaust holes, the first static contact 202, and the welding feet 206.

[0031] Whether it is the odd-layer S1 or the even-layer S2 switch unit layer 200, it has a housing 201. Inside the housing 201, a first static contact 202, a second static contact 203, and a moving contact disc are provided. The moving contact disc is rotatably arranged with the housing 201, and the two ends of the moving contact on the moving contact disc correspond to the two static contacts respectively. The moving contact disc is rotatably arranged on the housing 201, and the two static contacts are fixed on the housing 201. When the moving contact rotates along one direction to the position where it contacts the two static contacts (the first position), the connection is completed. As the moving contact rotates in the reverse direction, the moving and static contacts are completely disconnected.

[0032] Inside the housing 201 of each switch unit layer 200, two arc extinguishing chambers 205 are also provided. These two arc extinguishing chambers 205 are in a one-to-one correspondence with the static contacts, that is, one arc extinguishing chamber 205 is used to extinguish the arc when the moving contact and the first static contact 202 are disconnected, and the other arc extinguishing chamber 205 is used to extinguish the arc when the moving contact and the first static contact 202 are disconnected.

[0033] The housing 201 includes a first long side wall 201a, a second long side wall 201c, a first short side wall 201b, and a second short side wall 201d. The two ends of the first long side wall 201a and the second long side wall 201c are connected by the first short side wall 201b and the second short side wall 201d respectively. Simply put, the first long side wall 201a, the first short side wall 201b, the second long side wall 201c, and the second short side wall 201d are connected in sequence. Here, the first long side wall 201a, the second long side wall 201c, the first short side wall 201b, and the second short side wall 201d do not specifically refer to walls with a very flat surface, and there are some features on their surfaces.

[0034] The first stationary contact 202 is wired through the welding leg 206. The welding leg 206 is electrically connected to the first stationary contact 202, and the electrical connection here is that the first stationary contact 202 and the welding leg 206 are an integral part. The second stationary contact 203 is electrically connected to the wiring part 207. The electrical connection here is that the first stationary contact 202 and the welding leg 206 are an integral part, and the wiring part 207 is wired through the wiring screw 208. Here, the welding leg 206 extends from the first long side wall 201a to the outside of the housing 201, and the welding legs 206 of the odd-layer S1 and even-layer S2 switch unit layers 200 are staggeredly distributed. Here, the wiring part 207 is at least partially exposed outside the second long side wall 201c, so that the wiring screws 208 of all the switch unit layers 200 are on an imaginary straight line. In order to ensure the creepage distance between the wiring parts 207 of adjacent two switch unit layers 200, a partition part 209 protruding from the second long side wall 201c to the outside of the outer housing 201 is provided, and the partition part 209 separates two adjacent wiring parts 207.

[0035] Here, on the housing 201 of the odd-layer S1 switch unit layer 200, two first exhaust ports 210 are provided. These two exhaust ports correspond to two arc extinguishing chambers 205 (the two arc extinguishing chambers 205 within its own housing 201), or can be said to correspond to two static contacts (the two static contacts within its own housing 201). The first exhaust port 210 can discharge the gas generated by the arc between the moving and static contacts when the switch unit layer 200 is disconnected. On the housing 201 of the even-layer S2 switch unit layer 200, two second exhaust ports 220 are provided. These two exhaust ports correspond to two arc extinguishing chambers 205 (the two arc extinguishing chambers 205 within its own housing 201), or can be said to correspond to two static contacts (the two static contacts within its own housing 201). The second exhaust port 220 can discharge the gas generated by the arc between the moving and static contacts when the switch unit layer 200 is disconnected. Here, the included angle between the opening directions of the first exhaust port 210 and the second exhaust port 220 is A, and A is 90°. Of course, in addition to this, other included angles can also be used, such as 15°, 30°, 40°, 50°, 60°, 85°, etc., as long as 15° ≤ included angle A ≤ 90° is satisfied.

[0036] Here, for further explanation, the first exhaust port 210 is provided on the short side wall, that is, the two first exhaust ports 210 are respectively provided on the first short side wall 201b and the second short side wall 201d, and are at the end of the short side wall close to the second long side wall 201c.

[0037] Due to the connection relationship between the long side wall and the short side wall, the housing 201 has four corner positions AN. For the first exhaust port 210, it is provided at the end of the first short side wall 201b and the second short side wall 201d of the odd-layer S1 switch unit layer 200 close to the second long side wall 201c (that is, the corner position AN), and the opening direction is perpendicular to the short side wall. For the second exhaust port 220, the number is also two (corresponding to the static contacts within its own housing 201 one by one), the opening direction is perpendicular to the second long side wall 201c, and is close to the first exhaust port 210, that is, located at the corner position AN formed by the first short side wall 201b and the second long side wall 201c and the corner position AN formed by the second short side wall 201d and the second long side wall 201c.

[0038] More specifically, protrusions 201e are provided on both the first short side wall 201b and the second short side wall 201d, and a transition inclined surface 201f is connected between the first long side wall 201a and the protrusion 201e. The two first exhaust ports 210 are respectively provided on the two protrusions 201e, and the two second exhaust ports 220 are respectively provided on the two transition inclined surfaces 201f.

[0039] For the first exhaust ports 210 and the second exhaust ports 220, the two first exhaust ports 210 are in a mirror image relationship, and the two second exhaust ports 220 are also in a mirror image relationship, which is beneficial to the processing of the product.

[0040] For the odd-layer S1 housing 201, its first exhaust port 210 is connected to the first exhaust passage 230. Here, the first exhaust passage 230 refers to the passage between the rear of the arc extinguishing chamber 205 (the end of the arc extinguishing chamber 205 close to the breaking path of the moving contact is the front) and the first exhaust port 210.

[0041] For the even-layer S2 housing 201, its second exhaust port 220 is connected to the second exhaust passage 240. Here, the second exhaust passage 240 refers to the passage between the rear of the arc extinguishing chamber 205 (the end of the arc extinguishing chamber 205 close to the breaking path of the moving contact is the front) and the second exhaust port 220.

[0042] Whether it is the first exhaust passage 230 or the second exhaust passage 240, there is an arc extinguishing member 250 inside. Here, the arc extinguishing member 250 is a perforated metal plate. Of course, a metal braid can also be used, so as to generate gaps, so that the ions of the arc gas passing through are absorbed by the arc extinguishing member 250. The arc extinguishing member 250 is specifically arranged as follows. For the first exhaust passage 230, it is arranged at the position of the first exhaust passage 230 close to the first exhaust port 210; for the second exhaust passage 240, it is at the position of the second exhaust passage 240 close to the second exhaust port 220.

[0043] In order to better improve the exhaust effect, a Laval nozzle 260 is formed at the connection between the first exhaust passage 230 and the first exhaust port 210, and a Laval nozzle 260 is also formed at the connection between the second exhaust passage 240 and the second exhaust port 220.

[0044] Inside the housing 201 of the switch unit layer 200 of the odd-layer S1, a first partition wall 270 is provided between the arc extinguishing chamber 205 and the short side wall of the odd-layer S1 housing 201. That is, there are two first partition walls 270 between the first short side wall 201b and the corresponding arc extinguishing chamber 205. The gap between two adjacent first partition walls 270 and the gap between the first partition wall 270 and the first short side wall 201b form an air passage, and this air passage belongs to a part of the first exhaust passage 230.

[0045] There are also two first partition walls 270 between the second short side wall 201d and the corresponding arc extinguishing chamber 205. The gap between two adjacent first partition walls 270 and the gap between the first partition wall 270 and the first short side wall 201b form an air passage, and this air passage belongs to a part of the first exhaust passage 230.

[0046] Similarly, within the housing 201 of the switching unit layer 200 of the even layer S2, a second partition wall 280 is provided between the arc extinguishing chamber 205 and the short side wall of the housing 201 of the even layer S2. That is, there are two second partition walls 280 between the first short side wall 201b and the corresponding arc extinguishing chamber 205. The gaps between two adjacent second partition walls 280 and the gaps between the second partition walls 280 and the first short side wall 201b form an air duct, and this air duct is part of the second exhaust passage 240.

[0047] There are two second partition walls 280 between the second short side wall 201d and the corresponding arc extinguishing chamber 205. The gaps between two adjacent second partition walls 280 and the gaps between the second partition walls 280 and the second short side wall 201d form an air duct, and this air duct is part of the second exhaust passage 240.

[0048] The number of the above-mentioned first partition walls 270 and second partition walls 280 is at least two. That is, in addition to two, more can also be provided.

[0049] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An exhaust structure of a disconnector, which comprises at least two layers of switch unit layers, and each layer of switch unit layer has a housing; the switch unit layers are divided into odd-numbered layers and even-numbered layers; and it is characterized in that: At least one first exhaust port is provided on the housing of all odd-numbered layers, and at least one second exhaust port is provided on the housing of all even-numbered layers. Each first exhaust port corresponds to a second exhaust port; the opening directions of the corresponding first exhaust port and second exhaust port are set at an angle A, where 15° ≤ A ≤ 90°.

2. The exhaust structure of an isolating switch according to claim 1, characterized in that: The housing of each switch unit layer includes two long side walls and two short side walls, and the two ends of the two long side walls are connected by the two short side walls respectively; the first exhaust port is provided on the short side wall of the housing of the odd-numbered layer and is located at one end of the short side wall close to the long side wall.

3. The exhaust structure of a disconnecting switch according to claim 1, characterized in that: The housing of each switch unit layer includes two long side walls and two short side walls, and the two ends of the two long side walls are connected by the two short side walls respectively; the opening direction of the first exhaust port is perpendicular to the short side wall, and the opening direction of the second exhaust port is perpendicular to the long side wall. The corresponding first exhaust port and second exhaust port are concentrated at the corner positions of the same orientation of the two housings. The corner position refers to the position where one long side wall is connected to the short side wall.

4. The exhaust structure of a disconnector according to claim 1, characterized in that: The housing of each switch unit layer includes two long side walls and two short side walls, and the two ends of the two long side walls are connected by the two short side walls respectively; the two long side walls are the second long side wall and the second long side wall respectively, and a convex portion is provided on the short side wall. A transition inclined surface is connected between the second long side wall and the convex portion; the first exhaust port is provided on the convex portion, and the second exhaust port is provided on the transition inclined surface.

5. An exhaust structure of a disconnector according to claim 1 or 2 or 3 or 4, characterized in that: There are two first exhaust ports on the housing of the odd-numbered layer, and the two first exhaust ports are mirror-image arranged; there are two second exhaust ports on the housing of the even-numbered layer, and the two second exhaust ports are mirror-image arranged.

6. The exhaust structure of a disconnector according to claim 2 or 3, characterized in that: Each layer of the switch unit layer further includes a first static contact and a welding foot, the first static contact is electrically connected to the welding foot, and the first static contact is arranged inside the housing; the two long side walls are the first long side wall and the second long side wall respectively, and the welding foot extends from the first long side wall to the outside of the housing; Both the first exhaust port and the second exhaust port are arranged far away from the first long side wall.

7. An exhaust structure of a disconnecting switch according to claim 5, characterized in that: Each layer of the switch unit layer further includes a second static contact and a wiring part, the second static contact is electrically connected to the wiring part, and the second static contact is arranged inside the housing; at least part of the wiring part is exposed outside the second long side wall, and a wiring screw is provided on the wiring part; the wiring parts of all switch unit layers are on an imaginary straight line, and a partition part protruding outward from the housing body is further provided on the second long side wall, and the partition part separates the adjacent two wiring parts.

8. The exhaust structure of a disconnecting switch according to claim 1, characterized in that: A first exhaust passage is further provided on the housing of the odd-numbered layer, and the first exhaust port is communicated with the first exhaust passage; a second exhaust passage is further provided on the housing of the even-numbered layer, and the second exhaust port is communicated with the second exhaust passage; arc extinguishing parts are arranged at the positions where the first exhaust passage is close to the first exhaust port and the second exhaust passage is close to the second exhaust port; the arc extinguishing part is a perforated metal plate or the arc extinguishing part is a metal braid.

9. The exhaust structure of a disconnecting switch according to claim 1, characterized in that: A first exhaust passage is further provided on the housing of the odd-numbered layer, and the first exhaust port is communicated with the first exhaust passage; a second exhaust passage is further provided on the housing of the even-numbered layer, and the second exhaust port is communicated with the second exhaust passage; a Laval nozzle is formed at the connection between the first exhaust passage and the first exhaust port, and a Laval nozzle is formed at the connection between the second exhaust passage and the second exhaust port.

10. The exhaust structure of a disconnector according to claim 2 or 3, characterized in that: A first exhaust passage is further provided on the odd-layer housing, and the first exhaust port is communicated with the first exhaust passage; a second exhaust passage is further provided on the even-layer housing, and the second exhaust port is communicated with the second exhaust passage; arc extinguishing chambers are provided in both the odd-layer housing and the even-layer housing, and at least two first partition walls are provided between the arc extinguishing chamber and the short side wall of the odd-layer housing, and at least two second partition walls are provided between the arc extinguishing chamber and the short side wall of the even-layer housing; the gaps between two adjacent first partition walls and the gaps between the first partition wall and the short side wall are all part of the first exhaust passage; the gaps between two adjacent second partition walls and the gaps between the second partition wall and the short side wall are all part of the second exhaust passage.

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