Double-breakpoint switch unit and isolating switch

Abstract

The invention relates to the technical field of low-voltage electric appliances, and particularly discloses a double-breakpoint switch unit and an isolating switch. A moving contact assembly driven to rotate is arranged in the middle of the shell structure, a static contact assembly and an arc extinguishing assembly are arranged on the rotating plane of the moving contact assembly, and the static contact assembly and the arc extinguishing assembly are arranged at intervals in the circumferential direction of the rotating axis of the moving contact assembly. The arc extinguishing assemblies are arranged on two sides of the moving contact assembly along a first direction, the static contact assemblies are arranged on two sides of the moving contact assembly along a second direction, and the first direction is vertically intersected with the second direction. According to the invention, the space utilization rate in the switch shell can be improved, and the size of the whole switch is effectively reduced while the arc extinguishing performance is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a double-breakpoint switch unit and an isolating switch. Background Art

[0002] The development of low-voltage electrical appliances has led to higher performance requirements for high-voltage DC disconnectors. Currently, double-break disconnectors cannot meet the needs of customers for low-voltage appliances operating at 2000-2500V DC. To improve the arc-extinguishing capability of double-break disconnectors, low-voltage electrical switch manufacturers generally employ the addition of grids to increase the arc-breaking voltage, enabling the low-voltage switches to meet the higher arc-extinguishing voltage requirements. However, this significantly increases the size of the double-break disconnectors, making them unsuitable for use in residential power distribution environments. Summary of the Invention

[0003] The purpose of this application is to provide a double-breakpoint switch unit and an isolating switch, which can improve the space utilization inside the switch housing by optimizing the structural layout of the double-breakpoint isolating switch, and effectively reduce the volume of the entire switch while ensuring arc extinguishing performance.

[0004] The embodiment of the present application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a double-breakpoint switch unit, comprising a shell structure; a driven rotating moving contact assembly is provided in the middle of the shell structure, a static contact assembly and an arc extinguishing assembly are arranged on the rotation plane of the moving contact assembly, and the static contact assembly and the arc extinguishing assembly are arranged at circumferential intervals along the rotation axis of the moving contact assembly; the arc extinguishing assembly is arranged on both sides of the moving contact assembly along a first direction, and the static contact assembly is arranged on both sides of the moving contact assembly along a second direction, and the first direction intersects the second direction perpendicularly.

[0006] As an optional embodiment, the moving contact assembly includes a rotating bracket and a moving contact rod inserted into the rotating bracket, and the extension direction of the moving contact rod is perpendicular to the rotation axis; a gas-producing structure is provided on the rotating bracket, and the gas-producing structure is located on both sides of the extension direction of the moving contact rod, and the rotating bracket is driven to drive the gas-producing structure and the moving contact rod to rotate synchronously.

[0007] As an optional embodiment, the gas-generating structural component is provided with a plurality of grooves arranged at intervals along the extension direction of the moving contact rod, the extension direction of the grooves intersects with the extension direction of the moving contact rod, and one end of the grooves is close to the rotation path of the end of the moving contact rod.

[0008] As an optional embodiment, the gas-producing structural member includes gas-producing side plates arranged on both sides of the rotating plane, and the two gas-producing side plates are connected by a gas-producing baffle near the side of the moving contact rod; a plurality of gas-producing ribs arranged at intervals are arranged between the two gas-producing side plates, and the grooves are formed between adjacent gas-producing ribs.

[0009] As an optional implementation, the gas production side plate and the rotation plane are parallel to each other, and the gas production rib plate intersects the rotation plane perpendicularly.

[0010] As an optional embodiment, the arc extinguishing assembly includes a first grid group and a second grid group; the grids of the first grid group are arranged at intervals along the rotation path of the moving contact assembly, and adjacent grids have a preset angle; the grids of the second grid group are arranged at intervals and parallel to each other, and the grids of the first grid group intersect with the grids of the second grid group.

[0011] As an optional embodiment, an arc-starting plate is arranged between the first grid plate assembly and the second grid plate assembly, and the arc-starting plate includes a first guide plate close to one end of the first grid plate group and a second guide plate arranged at one end of the second grid plate group; the grid plates of the first grid plate group close to the first guide plate are parallel to the first guide plate; the grid plates of the second grid plate group close to the second guide plate are parallel to the second guide plate, and the second grid plate group has a grid plate close to the static contact assembly at the end away from the second guide plate.

[0012] As an optional implementation manner, the angle between the grid plates of the first grid plate group and the grid plates of the second grid plate group is 45-135°.

[0013] As an optional implementation, the static contact assembly has a bent plate extending toward one side of the arc extinguishing assembly, and a U-shaped magnetizing component with an opening toward the arc extinguishing assembly is sleeved on the bent plate.

[0014] As an optional embodiment, an isolation plate assembly is provided inside the shell structure; the isolation plate assembly divides the shell structure into two independent chambers, and the two independent chambers are respectively provided with an arc extinguishing assembly, a static contact assembly and a moving contact assembly; the isolation plate assembly includes two isolation baffles that are rotationally symmetrical about the rotation axis of the moving contact assembly, and a mounting base for mounting the moving contact assembly is provided in the mounting shell, and one end of the isolation baffle is connected to the inner wall of the shell structure, and the other end is connected to the mounting base.

[0015] In the second aspect, an embodiment of the present application provides an isolating switch, comprising a plurality of the above-mentioned double breakpoint switch units; the plurality of the double breakpoint switch units are arranged side by side in sequence along the rotation axis of the moving contact assembly, and also include an operating mechanism and a handle connected to the double breakpoint switch units, for driving the moving contact assembly to rotate.

[0016] The beneficial effects of the embodiments of the present application include:

[0017] An embodiment of the present application provides a double-breakpoint switch unit, comprising a shell structure; a driven rotating moving contact assembly is provided in the middle of the shell structure, a static contact assembly and an arc extinguishing assembly are arranged on the rotating plane of the moving contact assembly, and the static contact assembly and the arc extinguishing assembly are arranged at intervals along the circumferential direction of the rotating axis of the moving contact assembly; the arc extinguishing assembly is arranged on both sides of the moving contact assembly along the first direction, and the static contact assembly is arranged on both sides of the moving contact assembly along the second direction. The first direction and the second direction of the embodiment of the present application intersect perpendicularly, so that the static contact assembly and the arc extinguishing assembly are compactly distributed around the moving contact assembly, so that the internal space of the shell structure can be reasonably utilized, and the structural layout makes the interior of the shell structure more compact, which is convenient for setting more arc extinguishing assemblies of arc extinguishing grids, so that the double-breakpoint switch unit can effectively reduce the volume of the entire switch while ensuring arc extinguishing performance.

[0018] An embodiment of the present application provides an isolating switch comprising a plurality of the aforementioned dual-break switch units; the plurality of dual-break switch units are sequentially arranged side by side along the rotation axis of the movable contact assembly. The embodiment of the present application employs the plurality of dual-break switch units arranged side by side, making the overall isolating switch structure more compact, facilitating a reduction in overall switch size while maintaining arc extinguishing performance, and facilitating installation and use in a home environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a structural diagram of a double breakpoint switch unit according to an embodiment of the present application;

[0021] Figure 2 This is a schematic structural diagram of a rotating bracket according to an embodiment of the present application;

[0022] Figure 3 This is a schematic structural diagram of the gas-generating structural component of an embodiment of the present application;

[0023] Figure 4This is a schematic structural diagram of the housing structure of an embodiment of the present application;

[0024] Figure 5 This is a schematic structural diagram of the arc extinguishing assembly according to an embodiment of the present application;

[0025] Figure 6 This is a schematic structural diagram of the arc extinguishing assembly according to an embodiment of the present application;

[0026] Figure 7 This is a schematic structural diagram of a static contact assembly according to an embodiment of the present application;

[0027] Figure 8 This is a schematic structural diagram of the isolating switch according to an embodiment of the present application.

[0028] Icons: 100-housing structure; 101-rotating bracket; 102-rotating axis; 103-moving contact assembly; 104-first direction; 105-arc extinguishing assembly; 106-second direction; 107-stationary contact assembly; 108-first grid group; 109-gas generating structure; 110-moving contact rod; 111-groove; 113-clamping assembly; 114-first housing; 115-second housing; 116- Rectangular mounting chamber; 117-mounting base; 118-isolating plate assembly; 119-independent chamber; 120-second grid group; 121-moving contact; 122-arc striking angle; 123-gas-producing side plate; 124-gas-producing rib plate; 125-arc striking plate; 126-first guide plate; 127-second guide plate; 128-bending plate; 129-U-shaped magnetizing part; 130-operating mechanism; 131-double breakpoint switch unit. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0031] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In addition, the terms "first," "second," "third," etc. are used only to distinguish the descriptions and are not to be understood as indicating or implying relative importance.

[0032] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0033] Currently, double-break disconnectors are unable to meet the needs of customers for low-voltage electrical appliances operating at 2000-2500V DC. To improve the arc-extinguishing capabilities of double-break disconnectors, low-voltage electrical switch manufacturers generally increase the arc-breaking voltage by adding grids, enabling the low-voltage switches to meet the higher arc-extinguishing voltage requirements. However, this significantly increases the size of the double-break disconnectors, making them unsuitable for use in residential power distribution environments.

[0034] In order to solve the above technical problems, the embodiments of the present application provide a double breakpoint switch unit and an isolating switch.

[0035] First, refer to Figure 1 and Figure 2 As shown, an embodiment of the present application provides a double-breakpoint switch unit, including a shell structure 100; a driven rotating moving contact assembly 103 is provided in the middle of the shell structure 100, and a static contact assembly 107 and an arc extinguishing assembly 105 are arranged on the rotation plane of the moving contact assembly 103, and the static contact assembly 107 and the arc extinguishing assembly 105 are arranged at intervals along the circumference of the rotation axis 102 of the moving contact assembly 103; the arc extinguishing assembly 105 is arranged on both sides of the moving contact assembly 103 along a first direction 104, and the static contact assembly 107 is arranged on both sides of the moving contact assembly 103 along a second direction 106, and the first direction 104 and the second direction 106 intersect vertically.

[0036] It should be noted that the internal space of the housing structure 100 of the double-break disconnector provided by the prior art is not fully utilized, and the structural layout is not compact. In response to this, the embodiment of the present application disposes the movable contact assembly 103 in the middle of the housing structure 100, and symmetrically arranges the arc extinguishing assemblies 105 on either side of the movable contact assembly 103, and symmetrically arranges the static contact assemblies 107 on the other two sides of the movable contact assembly 103. In other words, the structure is arranged around the movable contact assembly 103.

[0037] Reference Figure 1 As shown, since the static contact assembly 107 is a metal plate structure and is located in the middle of the shell structure 100, the static contact assembly 107 is flatly arranged, so that the static contact assembly 107 only occupies a small amount of space on both sides, so that the arc extinguishing assembly 105 can compress the static contact assembly 107 space toward the middle to obtain a larger layout space.

[0038] Reference Figure 1 and Figure 4 As shown, the housing structure 100 includes a first housing 114 and a second housing 115 that are correspondingly arranged. The first housing 114 and the second housing 115 are snapped together to form a rectangular installation chamber 116 for installing the moving contact assembly 103, the static contact assembly 107 and the arc extinguishing assembly 105.

[0039] It should be noted that the housing structure 100 of the embodiment of the present application is a rectangular box-shaped structure. Except for the junction of the moving contact assembly 103 and the static contact assembly 107, that is, the mounting portion of the static contact assembly 107 and the mounting portion of the moving contact assembly 103, the rest of the space inside the rectangular box structure is used to arrange the arc extinguishing assembly 105. Figure 1 As shown, the rotating bracket 101 and the static contact assembly 107 occupy at most 1 / 3 of the internal space of the entire housing structure 100 , and the remaining 2 / 3 of the internal space of the entire housing structure 100 can be used to arrange the arc extinguishing assembly 105 .

[0040] It should be noted that, those skilled in the art can, based on the inspiration given by the structure provided in this application, continue to reduce the space occupied by the rotating bracket 101 and the static contact assembly 107 in the middle, thereby expanding the layout space of the arc extinguishing assembly 105.

[0041] An embodiment of the present application provides a double-break switch unit, including a shell structure 100; a moving contact assembly 103 is arranged in the shell structure 100, and the embodiment of the present application is provided with two arc-extinguishing assemblies 105 located on both sides of a rotating bracket 101 along a first direction 104 on the rotation plane of the moving contact assembly 103, and two static contact assemblies 107 located on both sides of the rotating bracket 101 along a second direction 106 on the rotation plane of the moving contact assembly 103, wherein the first direction 104 and the second direction 106 are perpendicularly intersected, so that the static contact assembly 107 and the arc-extinguishing assembly 105 are distributed around the rotating bracket 101, so that the internal space of the shell structure 100 can be reasonably utilized, and the structural layout makes the interior of the shell structure 100 more compact, which is convenient for setting arc-extinguishing assemblies 105 with more arc-extinguishing grids, so that the double-break switch unit can effectively reduce the volume of the entire switch while ensuring arc extinguishing performance.

[0042] Reference Figure 2 As shown, as an optional embodiment, the moving contact assembly 103 includes a rotating bracket 101 and a moving contact rod 110 inserted into the rotating bracket 101, and the extension direction of the moving contact rod 110 is perpendicular to the rotation axis 102; a gas-producing structure 109 is provided on the rotating bracket 101, and the gas-producing structure 109 is located on both sides of the extension direction of the moving contact rod 110, and the rotating bracket 101 is driven to drive the gas-producing structure 109 and the moving contact rod 110 to rotate synchronously.

[0043] When the moving contact assembly 103 and the static contact assembly 107 are separated, an arc is drawn between the moving contact assembly 103 and the static contact assembly 107. Since the gas-generating structure 109 rotates synchronously, the arc is located between the arc extinguishing assembly 105 and the gas-generating structure 109, thereby forming a double-sided arc extinguishing, which is beneficial to improving the arc extinguishing effect.

[0044] Reference Figure 2 and Figure 3 As shown, as an optional embodiment, the gas-generating structural member 109 is provided with a plurality of grooves 111 arranged at intervals along the extension direction of the moving contact rod 110, the extension direction of the groove 111 intersects with the extension direction of the moving contact rod 110, and one end of the groove 111 is close to the rotation path of the end of the moving contact rod 110.

[0045] In the embodiment of the present application, the longitudinal extension of the groove 111 can effectively increase the arc climbing distance, thereby enhancing the arc extinguishing effect of the gas-generating structural component 109.

[0046] Furthermore, the gas-generating structural member 109 of the embodiment of the present application is provided with a groove 111, and one end of the groove 111 is oriented toward the rotational path of the end of the moving contact rod 110. Since the arc-extinguishing groove opening on the arc-extinguishing structure is also oriented toward the rotational path of the end of the moving contact rod 110, a double-sided clamped arc extinguishing can be achieved. It should be noted that since the groove 111 is provided on the gas-generating structural member 109, high-pressure gas is generated at high temperatures. Combined with the opening orientation of the first groove 111, the gas-generating structural member 109 can release high-pressure gas toward one side of the arc-extinguishing assembly 105, thereby blowing the arc toward the interior of the arc-extinguishing assembly 105, not only achieving gas-blowing arc extinguishing, but also promoting the arc to fully enter the arc-extinguishing assembly 105.

[0047] Reference Figure 3 As shown, as an optional embodiment, the gas-producing structural member 109 includes gas-producing side plates 123 arranged on both sides of the rotating plane, and the two gas-producing side plates 123 are connected by a gas-producing baffle near the side of the moving contact rod 110; a plurality of spaced-apart gas-producing ribs 124 are arranged between the two gas-producing side plates 123, and grooves 111 are formed between adjacent gas-producing ribs 124.

[0048] The gas-producing side plate 123 is parallel to the rotation plane, and the gas-producing rib plate 124 is perpendicular to the rotation plane.

[0049] In the embodiment of the present application, the provision of the gas generating baffle can effectively prevent the arc from transferring to the rotation center of the moving contact rod 110 , thereby avoiding ablation of the structure on the moving contact rod 110 .

[0050] Reference Figure 2 As shown, as an optional embodiment, the gas generating structure 109 is connected to the rotating bracket 101 through a clamping assembly 113.

[0051] Furthermore, the gas-generating structural member 109 of the embodiment of the present application is connected to the rotating bracket 101 via a snap-fit assembly 113. The rotating bracket 101 is a rigid structure, and the gas-generating structural member 109 is made of a soft gas-generating material. By providing a snap-fit groove on the rotating bracket 101 and a protrusion on the gas-generating structural member 109, the protrusion and the snap-fit groove are engaged with each other through an interference fit.

[0052] Reference Figure 2 As shown, the gas generating structure 109 may be a crescent-shaped structure, and the gas generating structure 109 and the rotating bracket 101 form a cylindrical structure. It should be noted that the gas generating structure 109 may also be a long strip structure, which is not particularly limited.

[0053] It should be noted that other connecting members may also be used to fix the gas-generating structural member 109 and the rotating bracket 101 .

[0054] Reference Figure 5 and Figure 6 As shown, as an optional embodiment, the arc extinguishing assembly 105 includes a first grid plate group 108 and a second grid plate group 120. The grid plates of the first grid plate group 108 are arranged at intervals along the rotation path of the moving contact assembly 103, with adjacent grid plates at a predetermined angle. The grid plates of the second grid plate group 120 can be arranged at intervals along the first direction 104, with adjacent grid plates being parallel to each other. Those skilled in the art can also arrange the second grid plate group 120 in a direction that has an angle with the first direction 104. For example, the angle can be 3-10 degrees.

[0055] The grid plates of the first grid plate group 108 intersect with the grid plates of the second grid plate group 120 at an angle of 45-135°. The specific angle can be set by those skilled in the art as needed.

[0056] Furthermore, an arc-starting plate 125 is provided between the first grid plate group 108 and the second grid plate group 120 . The arc-starting plate 125 includes a first guide plate 126 close to one end of the first grid plate group 108 and a second guide plate 127 provided at one end of the second grid plate group 120 .

[0057] The grid plates of the first grid plate group 108 close to the first guide plate 126 are parallel to the first guide plate 126; the grid plates of the second grid plate group 120 close to the second guide plate 127 are parallel to the second guide plate 127, and the end of the second grid plate group 120 away from the second guide plate 127 has a grid plate close to the static contact assembly 107.

[0058] Compared with the prior art, without increasing the shell structure 100 , the arc extinguishing assembly 105 provided in the embodiment of the present application can be arranged with two groups of arc extinguishing grids with different arrangement directions through the improvement of the structural layout, thereby greatly improving the arc extinguishing ability of the arc extinguishing assembly 105 .

[0059] Reference Figure 6 and Figure 7 As shown, as an optional embodiment, the static contact assembly 107 has a bent plate 128 extending toward one side of the arc extinguishing assembly 105 , and a U-shaped magnetizing member 129 with an opening toward the arc extinguishing assembly 105 is sleeved on the bent plate 128 .

[0060] The static contact assembly 107 provided in the embodiment of the present application is provided with a U-shaped magnetizing component 129. After an arc is generated on the static contact assembly 107, the U-shaped magnetizing component 129 can generate an electromagnetic force to transfer the arc to the side of the second grid group 120, so as to quickly extinguish the arc on the static contact assembly 107.

[0061] Reference Figure 4 As shown, as an optional embodiment, an isolation plate assembly 118 is provided inside the shell structure 100; the isolation plate assembly 118 divides the shell structure 100 into two independent chambers 119, and an arc extinguishing assembly 105, a static contact assembly 107 and a moving contact assembly 103 are respectively provided in the two independent chambers 119.

[0062] Furthermore, the embodiment of the present application separates the housing structure 100 into two independent chambers 119 through the isolation plate assembly 118, so that the arcs generated on the two moving contact assemblies 103 exist independently, avoiding contact between the two parts of the arc, which is conducive to the independent extinction of the two parts of the arc.

[0063] Among them, the isolation plate assembly 118 includes two isolation baffles that are rotationally symmetrical about the rotation axis 102 of the moving contact assembly 103. A mounting seat 117 for mounting the moving contact assembly 103 is provided in the mounting shell. One end of the isolation baffle is connected to the inner wall of the shell structure 100 and the other end is connected to the mounting seat 117.

[0064] Reference Figure 2As shown, as an optional embodiment, the moving contact rod 110 includes two independent and parallel connecting plates, and a rotating shaft passing through the two connecting plates is provided in the middle of the rotating bracket 101, wherein two moving contacts 121 that can be in contact with the static contact assembly 107 are provided at the end of the moving contact rod 110.

[0065] It should be noted that the provision of the two moving contacts 121 can effectively increase the service life of the moving contact assembly 103 .

[0066] When the moving contact assembly 103 and the stationary contact assembly 107 separate, one of the moving contacts 121 separates from the stationary contact assembly 107, causing the arc to concentrate on the moving contact 121. Over extended use, the moving contact 121 wears out, causing the other moving contact 121 to separate from the stationary contact assembly 107, causing the arc to concentrate on the moving contact 121 that has been separated.

[0067] It should be noted that when the two moving contacts 121 are flush and can simultaneously separate and contact with the static contact structure, arcing may occur on any one of the moving contacts 121. Over long periods of use, the moving contact 121 with a higher arcing frequency may suffer more severe wear, thereby switching to the other moving contact 121 and separating from the static contact assembly 107. Therefore, the provision of two moving contacts 121 can effectively extend the service life of the moving contact assembly 103.

[0068] Reference Figure 2 As shown, as an optional embodiment, the moving contact 121 is provided with an arcing angle 122, and the extending direction of the arcing angle 122 and the extending direction of the connecting piece are preset at an angle. It should be noted that the preset angle can be 80-100 degrees, and those skilled in the art can set it according to needs.

[0069] For example, the included angle between the extending direction of the arc ignition angle 122 and the extending direction of the connecting piece is 89°. For example, the included angle between the extending direction of the arc ignition angle 122 and the extending direction of the connecting piece is 85°.

[0070] Secondly, refer to Figure 8 As shown, an embodiment of the present application provides an isolating switch, comprising a plurality of the above-mentioned double break switch units 131; the plurality of double break switch units are arranged side by side in sequence along the rotation axis 102 of the moving contact assembly 103, and also comprises an operating mechanism 130 and a handle connected to the double break switch units, for driving the moving contact assembly 103 to rotate.

[0071] It should be noted that, in the embodiment of the present application, a circular hole may be provided on the shell structure 100 , and the circular hole may be located between the isolation plate assembly 118 and the static contact assembly 107 , and multiple double-breakpoint switch units may be installed by passing a connecting shaft through the circular hole.

[0072] The embodiment of the present application adopts multiple double-breakpoint switch units as described above to be arranged side by side, so that the overall structure of the isolating switch is more compact, which facilitates reducing the volume of the entire switch while ensuring the arc extinguishing performance, and is conducive to installation and use in a home environment.

[0073] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A double breakpoint switch unit, characterized in that: It includes a shell structure; a driven rotating moving contact assembly is arranged in the middle of the shell structure, and a static contact assembly and an arc extinguishing assembly are arranged on the rotation plane of the moving contact assembly, and the static contact assembly and the arc extinguishing assembly are arranged at intervals along the circumference of the rotation axis of the moving contact assembly; the arc extinguishing assembly is arranged on both sides of the moving contact assembly along a first direction, and the static contact assembly is arranged on both sides of the moving contact assembly along a second direction, and the first direction and the second direction intersect perpendicularly.

2. The double break switch unit according to claim 1, characterized in that: The moving contact assembly includes a rotating bracket and a moving contact rod inserted into the rotating bracket, and the extension direction of the moving contact rod is perpendicular to the rotation axis; a gas-producing structure is provided on the rotating bracket, and the gas-producing structure is located on both sides of the extension direction of the moving contact rod, and the rotating bracket is driven to drive the gas-producing structure and the moving contact rod to rotate synchronously.

3. The double break switch unit according to claim 2, characterized in that: The gas generating structure is provided with a plurality of grooves spaced apart along the extension direction of the moving contact rod, the extension direction of the grooves intersects with the extension direction of the moving contact rod, and one end of the groove is close to the rotation path of the end of the moving contact rod.

4. The double-breakpoint isolation module switch unit according to claim 3, characterized in that: The gas-producing structural component includes gas-producing side plates arranged on both sides of the rotating plane, and the two gas-producing side plates are connected by a gas-producing baffle near the side of the moving contact rod; a plurality of gas-producing ribs arranged at intervals are arranged between the two gas-producing side plates, and the grooves are formed between adjacent gas-producing ribs.

5. The double-breakpoint isolation module switch unit according to claim 4, characterized in that: The gas-producing side plate is parallel to the rotation plane, and the gas-producing rib plate intersects the rotation plane perpendicularly.

6. The double breakpoint switch unit according to any one of claims 1 to 5, characterized in that: The arc extinguishing assembly includes a first grid group and a second grid group; the grids of the first grid group are arranged at intervals along the rotation path of the moving contact assembly, and adjacent grids have a preset angle; the grids of the second grid group are arranged at intervals and parallel to each other, and the grids of the first grid group intersect with the grids of the second grid group.

7. The double break switch unit according to claim 6, characterized in that: An arc-starting plate is provided between the first grid plate assembly and the second grid plate assembly, and the arc-starting plate includes a first guide plate close to one end of the first grid plate group and a second guide plate provided at one end of the second grid plate group; the grid plates of the first grid plate group close to the first guide plate are parallel to the first guide plate; the grid plates of the second grid plate group close to the second guide plate are parallel to the second guide plate, and the second grid plate group has a grid plate close to the static contact assembly at the end away from the second guide plate.

8. The double break switch unit according to claim 1, characterized in that: The static contact assembly has a bent plate extending toward one side of the arc extinguishing assembly, and a U-shaped magnetizing component with an opening toward the arc extinguishing assembly is sleeved on the bent plate.

9. The double break switch unit according to any one of claims 1 to 5 and claims 7 to 8, characterized in that: An isolation plate assembly is provided inside the shell structure; the isolation plate assembly divides the shell structure into two independent chambers, and an arc extinguishing assembly, a static contact assembly and a moving contact assembly are respectively provided in the two independent chambers; the isolation plate assembly includes two isolation baffles that are rotationally symmetrical about the rotation axis of the moving contact assembly, and a mounting base for installing the moving contact assembly is provided in the mounting shell, and one end of the isolation baffle is connected to the inner wall of the shell structure, and the other end is connected to the mounting base.

10. An isolating switch, characterized in that: It comprises a plurality of double breakpoint switch units as described in any one of claims 1 to 9; the plurality of double breakpoint switch units are arranged side by side in sequence along the rotation axis of the moving contact assembly, and also comprises an operating mechanism and a handle connected to the double breakpoint switch units, for driving the moving contact assembly to rotate.

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