Breaking switch

Abstract

The utility model belongs to the technical field of rotary switches, and particularly relates to a breaking switch which comprises a shell, a moving contact assembly, a static contact assembly and an arc extinguish chamber. The moving contact assembly comprises a moving contact rotating stand and a moving contact piece. The two ends of the moving contact piece protrude relative to the periphery of the moving contact rotating stand to form moving contact parts. Each group of static contact assemblies comprises at least one group of static contact parts and an elastic part, and each group of static contact parts comprises two static contact plates which form a clamping cavity with an opening; and in at least part of paths of the moving contact rotating stand to the opening position, the moving contact part is located in the arc extinguish chamber. The static contact is arranged to be of a contact structure comprising more than one group of static contact parts with bidirectional elastic clamping force, the thickness of the moving contact can be greatly reduced, the thickness of the longitudinal space of the arc extinguish chamber does not need to be increased, and the moving contact part of the moving contact can extend into the arc extinguish chamber, so that the effect of reliably and quickly breaking a high-voltage arc is achieved, the breaking capacity is improved, and the service life of the arc extinguish chamber is prolonged. And the purpose of high-voltage breaking is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotary switches, and in particular relates to a disconnect switch. Background Art

[0002] At present, the highest voltage used in high-voltage photovoltaic and energy storage systems reaches 1500V. In order to achieve cost reduction and efficiency improvement, and to achieve cost reduction in the system with the same power, there will be a higher demand for system voltage. As a result, the breaking capacity of system components, especially switch electrical appliances, must also be improved. At present, the market generally uses switches below 1500V. If you want to achieve high-voltage breaking, you can only increase the size of the switch. To achieve high-voltage breaking, the cost needs to be significantly increased, which makes it impossible to achieve the cost reduction goal. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a disconnect switch.

[0004] The technical solution adopted by the utility model is as follows: a disconnect switch, comprising a housing, a disconnect chamber formed in the housing, a moving contact assembly, a static contact assembly, and an arc extinguishing chamber arranged in the disconnect chamber; the moving contact assembly comprises a moving contact rotating frame and a moving contact piece fixed on the moving contact rotating frame; the static contact assembly comprises two groups, the two groups of static contact assemblies are fixed relative to the housing and are respectively located on both sides of the moving contact rotating frame; the arc extinguishing chamber comprises two groups, the two groups of arc extinguishing chambers are fixed relative to the housing and are respectively located on both sides of the moving contact rotating frame;

[0005] The two ends of the moving contact piece are raised relative to the outer periphery of the moving contact rotating frame to form a moving contact portion;

[0006] Each set of static contact components includes at least one set of static contact components and an elastic component, wherein one set of static contact components includes two static contact plates, and the two static contact plates of one set of static contact components are arranged at a certain distance to form a clamping cavity with an opening, and the elastic component is connected to the two static contact plates, and the elastic component is used to form elastic forces acting in opposite directions on the two static contact plates when the two static contact plates are stretched apart, so that the two static contact plates have a tendency to approach each other;

[0007] The moving contact rotating frame is rotatable relative to the housing and has an opening position and a closing position. When the moving contact rotating frame is in the closing position, the moving contact portion is located in the clamping cavity. When the moving contact rotating frame leaves the closing position, the moving contact portion is located in the arc extinguishing chamber in at least part of the path when it turns to the opening position.

[0008] Each group of static contact assemblies includes at least two groups of static contact parts, and the at least two groups of static contact parts are arranged side by side to form a clamping cavity for the moving contact to be inserted. Each group of static contact parts cooperates with at least one group of elastic parts so that the abutting elastic force of the two static contact parts of each group of static contact assemblies is provided separately.

[0009] Each set of stationary contact assemblies includes a wiring board, the wiring board is provided with a wiring portion and a first connecting plate, the wiring board passes through the housing so that the wiring portion is located outside the housing for wiring and the first connecting plate is located inside the housing;

[0010] A set of static contact components is a separate part. The two static contact plates are connected to form a U-shaped integrated structure through a second connecting plate. The second connecting plate is connected to the first connecting plate to form a conductive connection between the static contact components and the terminal board.

[0011] An opening is formed at one end of the two static contact plates away from the second connecting plate, and the opening faces the rotation path of the moving contact piece, and the moving contact piece is rotated into the clamping cavity through the opening.

[0012] An inclined surface is formed at one end of the static contact plate away from the second connecting plate so that the opening formed between the two static contact plates for the moving contact piece to be screwed in is horn-shaped. The thickness of the moving contact piece is smaller than the maximum width of the opening and larger than the distance between the two static contact plates in a natural state. During the screwing-in process of the moving contact piece, the moving contact piece interacts with the inclined surface on the static contact plate.

[0013] The elastic component is an elastic metal strip, and a group of static contact components is equipped with at least one elastic metal strip. The elastic component as a whole has a C-shaped structure, including two abutting ends separated by a certain distance. The elastic component bypasses the connection structure formed by the first connecting plate and the second connecting plate so that the two abutting ends respectively abut against the outer walls of the two static contact plates, thereby forming an elastic force on the static contact plate in the direction of the other static contact plate.

[0014] The distance between the two abutting ends is smaller than the width of the connection structure formed by the first connecting plate and the second connecting plate; the width of the first connecting plate is larger than that of the second connecting plate, and the two side edges of the first connecting plate form a limiting notch, and the elastic component is clamped in the limiting notch.

[0015] The static contact assembly also includes a positioning component, which is used to limit the minimum spacing between the two static contact plates; the positioning component is a separate part, including a third connecting plate and at least one limit block connected to the third connecting plate, the third connecting plate is connected to the second connecting plate, and the limit block is vertically connected to the third connecting plate and is arranged between the two static contact plates.

[0016] The moving contact piece is a single piece.

[0017] The arc extinguishing chamber comprises a plurality of arc extinguishing grids, and the plurality of arc extinguishing grids are distributed at intervals along the moving path of the moving contact part.

[0018] The beneficial effects of the utility model are as follows: the static contact is set as a contact structure including one or more static contact parts with bidirectional elastic clamping force, the thickness of the moving contact can be greatly reduced, and the longitudinal space thickness of the arc extinguishing chamber does not need to be increased, so that the moving contact part of the moving contact can be extended into the arc extinguishing chamber. When the switch is opened, the moving contact part moves in the arc extinguishing chamber, which can achieve the effect of reliable and rapid disconnection of high-voltage arcs, improve the breaking capacity, and achieve the purpose of high-voltage disconnection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0020] Figure 1 This is an exploded view of an embodiment of the utility model;

[0021] Figure 2 This is an internal stereoscopic view of an embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the cooperation between the moving contact assembly and the stationary contact assembly in one embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure coordination of an embodiment of the utility model;

[0024] Figure 5 This is a structural schematic diagram of a static contact assembly in an embodiment of the utility model;

[0025] Figure 6 This is an exploded view of a stationary contact assembly in one embodiment of the utility model;

[0026] Figure 7 This is a schematic structural diagram of a static contact component in an embodiment of the utility model;

[0027] Figure 8 This is a schematic diagram of the structure of an arc extinguishing chamber in an embodiment of the utility model;

[0028] In the figure, housing-100;

[0029] Moving contact assembly-200, moving contact rotating frame-210, moving contact piece-220, moving contact part-221;

[0030] Static contact assembly 300, static contact component 310, static contact plate 311, clamping cavity 312, second connecting plate 313, opening 314, elastic component 320, wiring board 330, wiring part 331, first connecting plate 332, limiting notch 333, positioning component 340, third connecting plate 341, limiting block 342;

[0031] Arc extinguishing chamber-400, arc extinguishing grid-410, insulating partition-420. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0033] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0034] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0035] A disconnect switch, such as Figure 1-2 As shown, it includes a housing 100, a breaking chamber is formed in the housing 100, and a moving contact assembly 200, a stationary contact assembly 300, and an arc extinguishing chamber 400 are arranged in the breaking chamber.

[0036] like Figure 3 As shown, the moving contact assembly 200 includes a moving contact rotating frame 210 and a moving contact piece 220 fixed on the moving contact rotating frame 210, and two ends of the moving contact piece 220 protrude relative to the outer periphery of the moving contact rotating frame 210 to form a moving contact portion 221;

[0037] The static contact assembly 300 includes two groups. The two groups of static contact assemblies 300 are fixed relative to the housing 100 and are respectively located on both sides of the moving contact rotating frame 210. Each group of static contact assemblies 300 includes at least one group of static contact components 310 and elastic components 320. One group of static contact components 310 includes two static contact plates 311. The two static contact plates 311 of one group of static contact components 310 are arranged at a certain interval to form a clamping cavity 312 with an opening 314. The elastic component 320 is connected to the two static contact plates 311. The elastic component 320 is used to form opposite elastic forces on the two static contact plates 311 when the two static contact plates 311 are stretched apart, so that the two static contact plates 311 have a tendency to approach each other.

[0038] The arc extinguishing chamber 400 includes two groups, and the two groups of arc extinguishing chambers 400 are fixed relative to the housing 100 and are respectively located on both sides of the moving contact rotating frame 210;

[0039] The moving contact carrier 210 is rotatable relative to the housing 100 and has an opening position and a closing position. When the moving contact carrier 210 is in the closing position, the moving contact portion 221 is located in the clamping cavity 312. When the moving contact carrier 210 leaves the closing position, the moving contact portion 221 is located in the arc extinguishing chamber in at least part of the path when it turns to the opening position.

[0040] The static contact is set as a contact structure including one or more static contact parts 310 with bidirectional elastic clamping force. The thickness of the moving contact can be greatly reduced, and the longitudinal space thickness of the arc extinguishing chamber does not need to be increased, so that the moving contact part of the moving contact can be extended into the arc extinguishing chamber. When the switch is opened, the moving contact part 221 moves in the arc extinguishing chamber, which can achieve the effect of reliable and rapid disconnection of high-voltage arcs, improve the breaking capacity, and achieve the purpose of high-voltage disconnection.

[0041] Further, such as Figure 5 , Figure 6 As shown, each set of static contact components 300 of this embodiment includes at least two sets of static contact parts 310, and at least two sets of static contact parts 310 are arranged side by side to form a clamping cavity for the moving contact to be inserted, and each set of static contact parts 310 is respectively matched with at least one set of elastic parts 320 so that the abutting elastic force of the two static contact parts 310 of each set of static contact components 300 is provided separately. The attached figure presents a contact structure with two sets of static contact components 300, and each set of static contact components 300 is matched with one elastic part 320.

[0042] The static contact parts 310 are arranged in at least two groups, so that the static contact parts 310 of the at least two groups of the split body will not interfere with each other. When the abutting elastic force provided by the elastic part 320 of one group is insufficient, the corresponding static contact part 310 may not form a good conductive contact with the moving contact, and the other static contact parts 310 can still maintain good contact, the overall life can be increased, and the requirements for processing accuracy are also reduced. In addition, the static contact parts 310 of the at least two groups of the split body are arranged side by side, which can reduce the temperature rise of the switch.

[0043] Furthermore, the movable contact piece 220 of the present embodiment is a single piece with a simple structure and a small thickness.

[0044] Furthermore, each group of static contact assemblies 300 includes a terminal block 330, which is provided with a terminal block 331 and a first connecting plate 332. The terminal block 330 passes through the housing 100 so that the terminal block 331 is located outside the housing 100 for wiring and the first connecting plate 332 is located inside the housing 100 and fixedly connected to the static contact component 310.

[0045] Specifically, Figure 7 As shown, a set of static contact components 310 is a separate part, and the two static contact plates 311 are connected to form a U-shaped integrated structure through a second connecting plate 313. The second connecting plate 313 is connected to the first connecting plate 332 to form a conductive connection between the static contact component 310 and the terminal board 330.

[0046] An opening 314 is formed at one end of the two static contact plates 311 away from the second connecting plate 313, and the opening 314 faces the rotation path of the movable contact piece 220, and the movable contact piece 220 is screwed into the clamping cavity 312 through the opening 314. Further, an inclined surface is formed at one end of the static contact plate 311 away from the second connecting plate 313, so that the opening 314 formed between the two static contact plates 311 for the movable contact piece 220 to be screwed in is horn-shaped, and the thickness of the movable contact piece 220 is less than the maximum width of the opening 314 and greater than the distance between the two static contact plates 311 in the natural state. During the screwing process of the movable contact piece 220, the movable contact piece 220 interacts with the inclined surface on the static contact plate 311.

[0047] The elastic component 320 is an elastic metal strip, and a group of static contact components 310 is equipped with at least one elastic metal strip. The elastic component 320 as a whole is a C-shaped structure, including two abutting ends separated by a certain distance. The elastic component 320 bypasses the connection structure formed by the first connecting plate 332 and the second connecting plate 313 so that the two abutting ends respectively abut against the outer walls of the two static contact plates 311, thereby forming an elastic force on the static contact plate 311 in the direction of the other static contact plate 311.

[0048] Furthermore, the spacing between the two abutting ends is smaller than the width of the connection structure formed by the first connecting plate 332 and the second connecting plate 313. The width of the first connecting plate 332 is larger than that of the second connecting plate 313. The two side edges of the first connecting plate 332 form a limiting notch 333, and the elastic component 320 is clamped in the limiting notch 333. Through the above-mentioned structural setting, the elastic component 320, the wiring board 330, and the static contact component 310 can be assembled into a component that is not easy to separate, which is conducive to subsequent assembly. The elastic component 320 can also adopt other common elastic parts, such as springs, metal springs, etc., and is set between the two static contact plates 311 and the upper and lower inner walls of the housing 100.

[0049] The stationary contact assembly 300 further includes a positioning component 340, which is used to limit the minimum spacing between the two stationary contact plates 311. The positioning component 340 can ensure the minimum spacing between the two stationary contact plates 311, that is, ensure that the moving contact piece 220 can smoothly rotate between the two stationary contact plates 311.

[0050] The positioning component 340 of this embodiment is a separate part, including a third connecting plate 341 and at least one limit block 342 connected to the third connecting plate 341. The third connecting plate 341 is connected to the second connecting plate 313. The limit block 342 is vertically connected to the third connecting plate 341 and is arranged between the two static contact plates 311. The minimum spacing between the two static contact plates 311 is the width of the limit block 342.

[0051] The number of limit blocks 342 that cooperate with a group of contact parts is at least one, and can be configured according to the width of the static contact plate 311. When the width of the static contact plate 311 is small, one limit block 342 can be set. When the width of the static contact plate 311 is large, at least two limit blocks 342 can be set to ensure that the two static contact plates 311 are subjected to balanced force.

[0052] Specifically, the first connecting plate 332, the second connecting plate 313 and the third connecting plate 341 of this embodiment are connected by fasteners. Specifically, fasteners such as rivets and screws can be used to pass through the first connecting plate 332, the second connecting plate 313 and the third connecting plate 341 in sequence to fix the three.

[0053] The positioning component 340 may also be arranged as a portion of the static contact component 310 , that is, connected to the static contact plate 311 and the second connecting plate 313 as a whole.

[0054] The arc extinguishing chamber 400 includes a plurality of arc extinguishing grids 410, which are spaced apart along the moving path of the moving contact portion 221 to achieve a better arc extinguishing effect. The plurality of arc extinguishing grids 410 can be fixed by setting an insulating partition 420 as shown in the figure, or the insulating partition 420 can be eliminated and replaced by the insulating inner wall of the housing 100 to directly fix the insulating partition 420.

[0055] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A disconnect switch, comprising a housing (100), wherein a disconnect chamber is formed in the housing (100), wherein a moving contact assembly (200), a stationary contact assembly (300), and an arc extinguishing chamber (400) are arranged in the disconnecting chamber; wherein the moving contact assembly (200) comprises a moving contact rotating frame (210) and a moving contact piece (220) fixed on the moving contact rotating frame (210); wherein the stationary contact assembly (300) comprises two groups, wherein the two groups of stationary contact assemblies (300) are fixed in position relative to the housing (100) and are respectively located on two sides of the moving contact rotating frame (210); wherein the arc extinguishing chamber (400) comprises two groups, wherein the two groups of arc extinguishing chambers (400) are fixed in position relative to the housing (100) and are respectively located on two sides of the moving contact rotating frame (210); wherein: Two ends of the moving contact piece (220) protrude relative to the outer periphery of the moving contact rotating frame (210) to form a moving contact portion (221); Each group of static contact components (300) comprises at least one group of static contact components (310) and an elastic component (320), wherein one group of static contact components (310) comprises two static contact plates (311), wherein the two static contact plates (311) of one group of static contact components (310) are arranged at a certain distance to form a clamping cavity (312) having an opening (314), and the elastic component (320) is connected to the two static contact plates (311), and the elastic component (320) is used to form elastic forces acting in opposite directions on the two static contact plates (311) when the two static contact plates (311) are stretched apart, so that the two static contact plates (311) have a tendency to approach each other; The moving contact rotating frame (210) is rotatable relative to the housing (100) and has an opening position and a closing position. When the moving contact rotating frame (210) is in the closing position, the moving contact portion (221) is located in the clamping cavity (312). When the moving contact rotating frame (210) leaves the closing position, in at least part of the path when it turns to the opening position, the moving contact portion (221) is located in the arc extinguishing chamber.

2. The disconnect switch according to claim 1, characterized in that: Each group of static contact components (300) comprises at least two groups of static contact parts (310), and the at least two groups of static contact parts (310) are arranged side by side to form a clamping cavity for inserting a moving contact, and each group of static contact parts (310) cooperates with at least one group of elastic parts (320) so that the abutting elastic force of the two static contact parts (310) of each group of static contact components (300) is provided separately.

3. The disconnect switch according to claim 1 or 2, characterized in that: Each group of stationary contact assemblies (300) comprises a wiring board (330), the wiring board (330) being provided with a wiring portion (331) and a first connecting plate (332), the wiring board (330) passing through the housing (100) so that the wiring portion (331) is located outside the housing (100) for wiring and the first connecting plate (332) is located inside the housing (100); A set of static contact components (310) is a separate part, and two static contact plates (311) are connected to form a U-shaped integrated structure via a second connecting plate (313). The second connecting plate (313) is connected to the first connecting plate (332) to form a conductive connection between the static contact components (310) and the wiring board (330).

4. The disconnect switch according to claim 3, characterized in that: An opening (314) is formed at one end of the two static contact plates (311) away from the second connecting plate (313), and the opening (314) faces the rotation path of the moving contact piece (220), and the moving contact piece (220) is rotated into the clamping cavity (312) through the opening (314).

5. The disconnect switch according to claim 4, characterized in that: An inclined surface is formed at one end of the static contact plate (311) away from the second connecting plate (313), so that an opening (314) formed between the two static contact plates (311) and into which the movable contact piece (220) is screwed is horn-shaped, the thickness of the movable contact piece (220) is smaller than the maximum width of the opening (314) and larger than the distance between the two static contact plates (311) in a natural state, and during the screwing-in process of the movable contact piece (220), the movable contact piece (220) interacts with the inclined surface on the static contact plate (311).

6. The disconnect switch according to claim 3, characterized in that: The elastic component (320) is an elastic metal strip, and a group of static contact components (310) is equipped with at least one elastic metal strip. The elastic component (320) is an overall C-shaped structure, comprising two abutting ends separated by a certain distance. The elastic component (320) bypasses the connection structure formed by the first connecting plate (332) and the second connecting plate (313), so that the two abutting ends abut against the outer walls of the two static contact plates (311), thereby forming an elastic force on the static contact plate (311) in the direction of the other static contact plate (311).

7. The disconnect switch according to claim 6, characterized in that: The distance between the two abutting end portions is smaller than the width of the connection structure formed by the first connection plate (332) and the second connection plate (313); the width of the first connection plate (332) is larger than the width of the second connection plate (313); the two side edges of the first connection plate (332) form limiting notches (333); and the elastic component (320) is clamped in the limiting notches (333).

8. The disconnect switch according to claim 3, characterized in that: The stationary contact assembly (300) further comprises a positioning component (340), the positioning component (340) being used to limit the minimum spacing between the two stationary contact plates (311); the positioning component (340) is a separate part, comprising a third connecting plate (341) and at least one limiting block (342) connected to the third connecting plate (341), the third connecting plate (341) being connected to the second connecting plate (313), the limiting block (342) being vertically connected to the third connecting plate (341) and being arranged between the two stationary contact plates (311).

9. The disconnect switch according to claim 1 or 2, characterized in that: The movable contact piece (220) is a single piece.

10. The disconnect switch according to claim 1, characterized in that: The arc extinguishing chamber (400) comprises a plurality of arc extinguishing grids (410), wherein the plurality of arc extinguishing grids (410) are distributed at intervals along the moving path of the moving contact portion (221).

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