Double-breakpoint switch unit and isolating switch

Abstract

The utility model 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] With the development of low-voltage electrical appliances, higher performance requirements have been put forward for high-voltage DC disconnectors. At present, double-break disconnectors cannot meet customers' demand for low-voltage electrical appliances with a DC voltage of 2000-2500V. In order to improve the arc extinguishing ability of double-break disconnectors, low-voltage electrical appliance switch manufacturers generally increase the breaking arc voltage by adding grids so that the low-voltage switch can meet higher voltage arc extinguishing requirements. The problem is that the size of the double-break disconnector is greatly increased, which is not conducive to the use of household power distribution environments. Utility Model Content

[0003] The purpose of the present 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 arranged 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 intervals along the circumferential direction 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 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 to rotate synchronously with the moving contact rod.

[0007] As an optional embodiment, the gas-generating structure 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 plate close to 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 groove is 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 one 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 stationary contact assembly has a bent plate extending toward one side of the arc extinguishing assembly, and the bent plate is sleeved with a U-shaped magnetizing component with an opening toward the arc extinguishing assembly.

[0014] As an optional embodiment, an isolation plate assembly is arranged 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 seat for mounting the moving contact assembly is arranged in the shell structure, 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 seat.

[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, including 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 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 a first direction, and the static contact assembly is arranged on both sides of the moving contact assembly along a 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 arc extinguishing grids and more arc extinguishing assemblies, so that the double breakpoint switch unit can effectively reduce the volume of the entire switch while ensuring the arc extinguishing performance.

[0018] The embodiment of the present application provides a disconnector, comprising a plurality of the above-mentioned double-breakpoint switch units; the plurality of double-breakpoint switch units are sequentially arranged side by side along the rotation axis of the moving contact assembly. The embodiment of the present application adopts the plurality of the above-mentioned double-breakpoint switch units arranged side by side, so that the overall structure of the disconnector is more compact, and the volume of the entire switch is reduced while ensuring the arc extinguishing performance, which is conducive to 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 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 present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

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

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

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

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

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

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

[0026] Figure 7 This is a schematic diagram of the structure of the static contact assembly of the embodiment of the present application;

[0027] Figure 8 This is a schematic diagram of the structure 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 seat; 118-isolating plate assembly; 119-independent chamber; 120-second grid group; 121-moving contact; 122-arcing angle; 123-gas-producing side plate; 124-gas-producing rib plate; 125-arcing plate; 126-first guide plate; 127-second guide plate; 128-bending plate; 129-U-shaped magnetizing component; 130-operating mechanism; 131-double breakpoint switch unit. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here 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 which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field 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, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] At present, double-break disconnectors cannot meet customers' demand for low-voltage electrical appliances with a DC voltage of 2000-2500V. In order to improve the arc extinguishing capability of double-break disconnectors, low-voltage electrical appliance switch manufacturers generally increase the breaking arc voltage by adding grids so that the low-voltage switch can meet higher voltage arc extinguishing requirements. However, the problem is that the size of the double-break disconnector is greatly increased, which is not conducive to its use in household 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 arranged in the middle of the shell structure 100, and a static contact assembly 107 and an arc extinguishing assembly 105 are arranged on the rotating plane of the moving contact assembly 103, and the static contact assembly 107 and the arc extinguishing assembly 105 are arranged at circumferential intervals along the rotating 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 view of this, the embodiment of the present application sets the moving contact assembly 103 in the middle of the housing structure 100, and symmetrically sets the arc extinguishing assembly 105 on both sides of the moving contact assembly 103, and symmetrically sets the static contact assembly 107 on the other two sides of the moving contact assembly 103. That is, the structure is arranged around the moving contact assembly 103.

[0037] Reference Figure 1 As shown, since the static contact assembly 107 is a metal plate-like structure 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 stationary 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 joint of the moving contact assembly 103 and the stationary contact assembly 107, that is, the mounting portion of the stationary 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] The embodiment of the present application provides a double breakpoint 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 respectively 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 stationary contact assemblies 107 respectively located on both sides of the rotating bracket 101 are arranged along a second direction 106 on the rotation plane of the moving contact assembly 103, wherein the first direction 104 intersects the second direction 106 perpendicularly, so that the stationary 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 internal structure of the shell structure 100 is made more compact in terms of structural layout, which facilitates the arrangement of arc extinguishing assemblies 105 with more arc extinguishing grids, so that the double breakpoint switch unit can effectively reduce the volume of the entire switch while ensuring the 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 is separated from the stationary contact assembly 107, an arc is drawn between the moving contact assembly 103 and the stationary 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] The embodiment of the present application can effectively increase the arc climbing distance through the longitudinal extension of the groove 111, so as to enhance 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 faces the rotation path of the end of the moving contact rod 110. Since the arc-extinguishing groove opening on the arc-extinguishing structure also faces the rotation path of the end of the moving contact rod 110, double-sided clamping arc extinguishing can be formed. It should be noted that since the groove 111 is provided on the gas-generating structural member 109, high-pressure gas will be generated at high temperature. Combined with the opening direction of the first groove 111, the gas-generating structural member 109 can release high-pressure gas to one side of the arc-extinguishing component 105, thereby blowing the arc to transfer to the inside of the arc-extinguishing component 105, which not only realizes the gas-blowing arc extinguishing, but also promotes the arc to fully enter the arc-extinguishing component 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 plate close to 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] The embodiment of the present application can effectively prevent the arc from transferring to the rotation center of the moving contact rod 110 by disposing the gas generating baffle, thereby avoiding ablation of the structure on the moving contact rod 110 .

[0050] Reference Figure 2 As shown, as an optional implementation, the gas generating structure 109 is connected to the rotating bracket 101 via 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 through a clamping assembly 113. The rotating bracket 101 is a hard structure, and the gas-generating structural member 109 is a soft gas-generating material. By providing a clamping groove on the rotating bracket 101 and a protrusion on the gas-generating structural member 109, the protrusion and the clamping groove are clamped by 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 structure 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, and adjacent grid plates have a preset angle; the grid plates of the second grid plate group 120 can be arranged at intervals along the first direction 104, and adjacent grid plates are parallel to each other. Those skilled in the art can also arrange the second grid plate group 120 along a direction having an angle with the first direction 104, and the angle can be 3-10° for example.

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

[0056] Furthermore, an arc-starting plate 125 is provided between the first grid plate group 108 and the second grid plate group 120 , and 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 second grid plate group 120 has a grid plate close to the static contact assembly 107 at one end away from the second guide plate 127 .

[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 arrange 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 stationary contact assembly 107 has a bending 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 bending 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 disposed 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 disposed in the two independent chambers 119.

[0062] Furthermore, the embodiment of the present application divides 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 shell structure. 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 arranged in the middle of the rotating bracket 101, wherein two moving contacts 121 capable of abutting against the static contact assembly 107 are arranged at the end of the moving contact rod 110.

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

[0066] When the moving contact assembly 103 is separated from the stationary contact assembly 107, one of the moving contacts 121 is separated from the stationary contact assembly 107, so that the arc is concentrated on the moving contact 121. During long-term use, the moving contact 121 will be worn, so that the other moving contact 121 is separated from the stationary contact assembly 107, so that the arc is concentrated on the moving contact 121 after the change.

[0067] It should be noted that when the two moving contacts 121 are flush and can be separated and contacted with the static contact structure at the same time, the arc will appear on any moving contact 121. In long-term use, the moving contact 121 with a higher arc frequency will be seriously damaged, so it is separated from the static contact assembly 107 by switching to the other moving contact 121. Therefore, the service life of the moving contact assembly 103 can be effectively improved by setting the two moving contacts 121.

[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°, and technicians in this field can set it according to needs.

[0069] Exemplarily, the included angle between the extending direction of the arc-starting angle 122 and the extending direction of the connecting piece is 89°. Exemplarily, the included angle between the extending direction of the arc-starting angle 122 and the extending direction of the connecting piece is 85°.

[0070] Second, refer to Figure 8 As shown, an embodiment of the present application provides an isolating switch, comprising a plurality of the above-mentioned double breakpoint switch units 131; the plurality of double breakpoint 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 breakpoint 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 a plurality of 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 only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A double breakpoint switch unit, characterized in that: It comprises a shell structure; a driven rotating moving contact assembly 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 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 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.

2. The double breakpoint switch unit according to claim 1, characterized in that: The moving contact assembly includes a rotating bracket and a moving contact rod inserted through 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 breakpoint switch unit according to claim 2, characterized in that: The gas generating structure 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.

4. The double breakpoint switch unit according to claim 3, characterized in that: 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 plate close to 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 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 breakpoint switch unit according to claim 6, characterized in that: 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 one end away from the second guide plate.

8. The double breakpoint switch unit according to claim 1, characterized in that: The stationary 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 breakpoint switch unit according to any one of claims 1 to 5 and claims 7 to 8, characterized in that: An isolation plate assembly is arranged inside the shell structure; the isolation plate assembly divides the shell structure into two independent chambers, and one arc extinguishing assembly, one static contact assembly and one moving contact assembly are respectively arranged 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 seat for mounting the moving contact assembly is arranged in the shell structure, 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 seat.

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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