Arc extinguishing system and rotary disconnecting switch

Abstract

The utility model relates to an arc extinguishing system and a rotary disconnecting switch, the arc extinguishing system comprises an integrated injection molding arc extinguishing cover, the arc extinguishing cover comprises two opposite side plates and a separator plate connected between the two side plates, a plurality of grid sheets are arranged between the two side plates, the inner sides of the two side plates are respectively provided with a mounting groove for mounting the grid sheets, and the two side plates are provided with a plurality of through holes. The partition plate is provided with receding holes corresponding to the mounting grooves in the two side plates respectively, the receding holes are communicated with the corresponding mounting grooves, a mold core used for injection molding of the mounting grooves in the side plates is parallel to the side plates, the mold core can penetrate through the partition plate from the receding holes, and a mold core perpendicular to the side plates does not need to be arranged in an injection molding machine. Core pulling from the side faces of the side plates during mold opening of the injection molding machine is avoided, the mold opening steps can be reduced, the output efficiency can be improved, the production cost can be reduced, and the structural strength of the arc extinguishing cover can be improved. The rotary disconnecting switch comprises the arc extinguishing system, and the cost of the rotary disconnecting switch can be reduced through the arc extinguishing system.

Description

Technical Field

[0001] The utility model relates to a switch electrical appliance, in particular to an arc extinguishing system and a rotary isolating switch. Background Art

[0002] With the rapid development of the economy, people's living standards have been significantly improved, and they have a more comprehensive understanding of electricity safety. In order to increase the safety of electricity use, an isolating switch is usually connected to the circuit so that when the electrical equipment is repaired, the isolating switch can cut off the power supply, isolate the live parts, and maintain an effective isolation distance. However, the arc extinguishing system structure of the existing isolating switch is unreasonable, which not only has insufficient mechanical strength, but also brings great difficulties to injection molding, resulting in high production costs. Summary of the invention

[0003] The utility model aims to overcome at least one defect of the prior art and provide an arc extinguishing system.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An arc extinguishing system comprises an arc extinguishing hood formed by integral injection molding, wherein the arc extinguishing hood comprises two side plates arranged opposite to each other and a partition plate connected between the two side plates, a plurality of grid plates are arranged between the two side plates, the inner sides of the two side plates are respectively provided with mounting grooves for mounting the grid plates, the partition plate is provided with clearance holes corresponding to the mounting grooves on the two side plates respectively, and the clearance holes are connected to the corresponding mounting grooves.

[0006] Preferably, the inner sides of the two side panels are respectively provided with a plurality of guide grooves corresponding to the mounting grooves, the guide grooves are connected to the mounting grooves, the depth of the mounting grooves is greater than the depth of the guide grooves, a step surface is provided at the connection between the mounting grooves and the guide grooves, the grid is provided with a mounting block for inserting into the mounting grooves, and the mounting block is limitedly matched with the step surface.

[0007] Preferably, the side plates are provided with raised guide bars on both sides of the guide groove, the side surfaces of the guide bars are flush with the groove walls of the guide groove, and the guide bars are inserted between two adjacent grid sheets to limit the side surfaces of the grid sheets.

[0008] Preferably, the mounting groove connects the inner side and the outer side of the side plate, and the opening of the mounting groove on the inner side of the side plate is used for inserting the mounting block.

[0009] Preferably, the width of the mounting groove is equal to the thickness of the grid plate, and the mounting block can block the opening of the mounting groove on the outer side of the side plate.

[0010] Preferably, a limit block is provided in the guide groove, and the grid plate is provided with a limit groove that is engaged with the upper limit of the limit block.

[0011] Preferably, the limit block is provided with a limit surface on the side close to the installation groove, the limit surface is flush with the step surface, the installation block constitutes at least one side groove wall of the limit groove, and when the limit groove is clamped in the upper limit position of the limit block, the installation block contacts and limits the limit surface.

[0012] Preferably, the limiting block is provided with a first transition surface on the side away from the mounting groove, and the first transition surface is arranged at an oblique angle to the side plate.

[0013] Preferably, the two side edges of the grid corresponding to the two side plates are respectively provided with second transition surfaces, and the second transition surfaces are arranged at an oblique angle to the side plates.

[0014] Preferably, a V-shaped arc-extinguishing notch is provided on the side of the grid away from the partition, an arc-extinguishing groove is provided at the bottom of the arc-extinguishing notch, and the arc-extinguishing grooves of two adjacent grids are staggered.

[0015] Preferably, the partition is provided with a plurality of exhaust holes, and a core for injection molding the mounting groove on the side plate is arranged parallel to the side plate and parallel to an exhaust core for molding the exhaust holes on the injection molding partition.

[0016] Preferably, the width of the clearance hole is equal to the thickness of the side panel, and the clearance hole is arranged corresponding to the side panel. The core used for injection molding the mounting groove on the side panel extends into the molding cavity of the mold from a direction parallel to the side panel, and is also used to mold the mounting groove on the side panel and the clearance hole on the partition.

[0017] Preferably, a raised outer rib is provided in the middle of the side surface of the partition away from the grid plate, and exhaust holes are respectively provided on both sides of the outer rib, and the exhaust holes on both sides of the outer rib are respectively projected onto the outer rib in an offset manner.

[0018] Preferably, the two side plates are connected via a top plate, the top plate is arranged opposite to an outermost grid plate, and one side of the top plate is connected to a partition plate.

[0019] Preferably, the partition plate is provided with a first exhaust hole serving as an exhaust hole, and the first exhaust hole is correspondingly arranged between two adjacent grid sheets.

[0020] Preferably, the exhaust hole closest to the top guide plate among the multiple exhaust holes is the second exhaust hole, and the second exhaust hole is connected to a clearance hole closest to the top plate.

[0021] Preferably, a raised inner rib is provided on the side of the partition close to the grille, the inner rib is flush with a hole wall of one side of the second exhaust hole, and the inner rib is inserted between two adjacent grilles to limit the side of the grille.

[0022] Preferably, the partition is in a curved shape, and a first plane and a second plane are provided on the side of the partition away from the grid, the first plane and the second plane are arranged at an oblique angle, the first plane and the second exhaust hole are arranged relatively on both sides of the outer convex rib, the second plane and the second exhaust hole are arranged on the same side of the outer convex rib, and the second exhaust hole is arranged between the second plane and the top plate.

[0023] The arc extinguishing system of this embodiment does not need to set a core perpendicular to the side plate in the injection molding machine, but sets a makeshift hole connected to the mounting groove on the partition plate, so that the core is parallel to the mold opening direction of the injection molding machine, avoiding core pulling from the side of the side plate when the injection molding machine opens the mold. This can not only reduce the mold opening steps, improve output efficiency, and reduce production costs, but also improve the structural strength of the arc extinguishing cover.

[0024] In addition, the mounting groove connects the inner and outer sides of the side panel, which can reduce the difficulty of injection molding. During injection molding, no glue is required at the outer side of the mounting groove, which avoids damage to the position during mold opening due to too thin thickness, thereby improving the yield rate.

[0025] In addition, the grid piece is provided with a limit groove which is engaged with the upper limit of the limit block. By engaging the limit groove with the upper limit of the limit block, the grid piece can be limited forward and backward to prevent the grid piece from moving along the guide groove direction.

[0026] The utility model also provides a rotary isolating switch, comprising an operating mechanism and at least one switch unit, wherein the operating mechanism and the switch unit are arranged in a stacked manner, the operating mechanism is connected to the switch unit drivingly to drive the switch unit to be turned on or off, the switch unit comprises a switch unit housing, and a contact system and two arc extinguishing systems arranged in the switch unit housing and used in conjunction therewith, the contact system comprising two static contacts and a rotatable moving contact mechanism located between the two static contacts, the two arc extinguishing systems being respectively arranged on one side of the two static contacts, one end of the operating mechanism being connected to the moving contact mechanism of the switch unit drivingly as a driving end, so that the moving contact mechanism is closed or disconnected from the static contact to realize the closing or opening of the rotary isolating switch.

[0027] Preferably, the moving contact mechanism includes a rotatably arranged contact support and a moving contact bridge passing through the contact support, wherein two ends of the moving contact bridge respectively contact and separate with two static contacts, and two contact grooves are provided on the radial side wall of the contact support, and two ends of the moving contact bridge are respectively located in the contact contact grooves, and one end of the two static contacts respectively extends into the two contact contact grooves to cooperate with the moving contact bridge, and in the process of the contact support driving the moving contact bridge to rotate, one end of the static contact that cooperates with the moving contact bridge is always located in the contact contact groove.

[0028] Preferably, two arc extinguishing systems are arranged on opposite sides of the contact support, the contact slot is connected to the arc extinguishing system, and baffles are provided at both ends of the contact slot to guide the arc gas into the arc extinguishing system.

[0029] Preferably, the other ends of the two stationary contacts extend out of the switch unit housing and are located on the same side wall of the switch unit housing.

[0030] The rotary disconnector of the present embodiment reduces the cost by using the arc extinguishing system, which not only reduces the cost of the rotary disconnector but also improves the reliability of the rotary disconnector.

[0031] In addition, the contact support is provided with a contact groove, which can isolate the arc. Further, the contact groove is connected to the arc extinguishing system, and baffles are provided at both ends of the contact groove to guide the arc gas into the arc extinguishing system, which can improve the arc extinguishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the switch unit structure of the utility model rotary isolating switch;

[0033] Figure 2-3 It is a structural schematic diagram of the arc extinguishing system of the utility model;

[0034] Figure 4-5 It is a structural schematic diagram of the arc extinguishing cover of the utility model;

[0035] Figure 6 It is a cross-sectional view of the arc extinguishing system of the utility model;

[0036] Figure 7 It is a structural schematic diagram of the utility model grid piece;

[0037] In the figure, 100, static contact; 200, moving contact mechanism; 1, side plate; 2, partition; 3, grid; 4, mounting groove; 5, exhaust hole; 6, clearance hole; 7, guide groove; 41, step surface; 31, mounting block; 11, guide strip; 72, limit block; 32, limit groove; 73, first transition surface; 33, second transition surface; 34, arc extinguishing notch; 35, arc extinguishing groove; 8, top plate; 21, outer convex rib; 51, first exhaust hole; 52, second exhaust hole; 22, inner convex rib; 23, first plane; 24, second plane. DETAILED DESCRIPTION

[0038] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the arc extinguishing system of the present utility model. The arc extinguishing system of the present utility model is not limited to the description of the following embodiments.

[0039] The rotary isolating switch of this embodiment includes an operating mechanism and at least one switch unit, the operating mechanism and the switch unit are stacked, the operating mechanism is connected to the switch unit drive to drive the switch unit to conduct or disconnect, Figure 1The switch unit includes a switch unit housing and a contact system and an arc extinguishing system arranged in the switch unit housing and used in conjunction with each other. The contact system includes two static contacts 100 and a rotatable moving contact mechanism 200 located between the two static contacts 100. The two arc extinguishing systems are respectively arranged on one side of the two static contacts 100. One end of the operating mechanism is connected to the moving contact mechanism 200 of the switch unit as a driving end, so that the moving contact mechanism 200 and the static contact 100 are closed or disconnected to realize the closing or opening of the rotary disconnector. The moving contact mechanisms 200 of adjacent switch units are connected in driving. The switch unit is used to control the power supply to the load. The other end of the operating mechanism is extended out of the housing of the operating mechanism as an operating end to drive the operating mechanism to operate. Figure 2-5 As shown, the arc extinguishing system of this embodiment includes an arc extinguishing hood that is integrally injection molded, and the arc extinguishing hood includes two side plates 1 that are arranged opposite to each other, and a partition plate 2 connected between the two side plates 1, a plurality of grid plates 3 are arranged between the two side plates 1, and the inner sides of the two side plates 1 are respectively provided with mounting grooves 4 for mounting the grid plates 3, and the partition plate 2 is provided with clearance holes 6 that respectively correspond to the mounting grooves 4 on the two side plates 1, and the corresponding clearance holes 6 are connected to the mounting grooves 4, and a core (not shown in the figure) for injection molding the mounting grooves 4 on the side plates 1 is arranged parallel to the side plates 1, so that the core can pass through the partition plate 2 from the clearance holes 6.

[0040] The injection molding machine is not shown in the figure. The punch is first inserted into the cavity to form the arc extinguishing hood. When the mold is opened, the punch is separated from the arc extinguishing hood in a direction parallel to the side plate 1. If a core perpendicular to the side plate 1 is provided, it is necessary to first pull the core out from the side when opening the mold, and then separate the punch from the arc extinguishing hood. Due to the unreasonable design of the arc extinguishing hood structure, the number of mold opening steps increases, which not only reduces the output efficiency, but also increases the probability of defective products.

[0041] The arc extinguishing system of this embodiment does not need to set a core perpendicular to the side panel 1 in the injection molding machine, but sets a clearance hole 6 connected to the mounting groove 4 on the partition 2, so that the core is parallel to the mold opening direction of the injection molding machine, avoiding the core being pulled out from the side of the side panel 1 when the injection molding machine is opening the mold. This can not only reduce the mold opening steps, improve output efficiency, and reduce production costs, but also improve the structural strength of the arc extinguishing cover.

[0042] The rotary disconnector of the present embodiment reduces the cost by using the arc extinguishing system, which not only reduces the cost of the rotary disconnector but also improves the reliability of the rotary disconnector.

[0043] like Figure 4 , 6As shown, the inner sides of the two side plates 1 are respectively provided with a plurality of guide grooves 7 corresponding to the mounting grooves 4, the guide grooves 7 are arranged at one end of the side plate 1 away from the partition plate 2, the guide grooves 7 are connected with the mounting grooves 4, the depth of the mounting grooves 4 is greater than the depth of the guide grooves 7, a step surface 41 is provided at the connection between the mounting grooves 4 and the guide grooves 7, the grid plate 3 is provided with a mounting block 31 for inserting into the mounting grooves 4, and the mounting block 31 is limitedly matched with the step surface 41. That is, refer to Figure 5 As shown, the portion of the side plate 1 communicating with the clearance hole 6 is the installation groove 4, and the grooves on the inner sides of the two side plates 1 away from the partition plate 2 are the guide grooves 7. As another inferior embodiment, only the installation grooves 4 can be provided to fix the grid plate 3 without providing the guide grooves 7. Further, as Figure 4 As shown, the side plate 1 is provided with raised guide strips 11 on both sides of the guide groove 7, and the side surfaces of the guide strips 11 are flush with the groove walls of the guide groove 7. The guide strips 11 are inserted between two adjacent grid sheets 3 to limit the side surfaces of the grid sheets 3. The guide strips 11 protrude from the inner side surfaces of the side plate 1. The guide strips 11 can increase the depth of the guide groove 7 without increasing the thickness of the side plate 1, thereby improving the reliability of the cooperation between the guide groove 7 and the grid sheets 3.

[0044] like Figure 5 As shown, the depth of the mounting groove 4 is equal to the thickness of the side panel 1, and the mounting groove 4 connects the inner side of the side panel 1 with the outer side. The opening of the mounting groove 4 on the inner side of the side panel 1 is used to insert the mounting block 31, so that the mounting block 31 can be inserted into the mounting groove 4 and limitedly cooperate with the step surface 41. The mounting groove 4 connects the inner side of the side panel 1 with the outer side, which can reduce the difficulty of injection molding. During injection molding, the outer side of the mounting groove 4 does not need to be injected with glue, avoiding damage to this position during mold opening due to too thin thickness, thereby improving the yield rate. Of course, the depth of the mounting groove 4 can also be less than the thickness of the side panel 1, which all falls within the protection scope of the present utility model.

[0045] like Figure 5 As shown, the partition 2 is provided with a plurality of exhaust holes 5, and the core used for injection molding the mounting groove 4 on the side panel 1 and the exhaust core used for molding the exhaust holes 5 on the injection molding partition 2 are parallel, and both are protruded on the punch for molding the arc extinguishing cover. When the mold is opened, the punch is separated from the arc extinguishing cover in a direction parallel to the side panel 1.

[0046] like Figure 5-6As shown, the opening direction of the clearance hole 6 is arranged parallel to the side panel 1, and the core (not shown in the figure) used for injection molding the mounting groove 4 on the side panel 1 is arranged parallel to the side panel 1, so that the core can pass through the partition 2 from the clearance hole 6. Preferably, the width of the clearance hole 6 is equal to the thickness of the side panel 1, and the clearance hole 6 is arranged completely corresponding to the side panel 1, that is, the opening direction of the clearance hole 6 is not only parallel to the side panel 1, but also overlaps with the side panel 1, and the core used for injection molding the mounting groove 4 on the side panel 1 is also used for the clearance hole 6, and the core corresponds to the position of the side panel 1 and extends into the molding cavity of the mold from a direction parallel to the side panel 1. It is used to mold the mounting groove 4 on the side panel 1 and the clearance hole 6 on the partition 2 at the same time.

[0047] like Figure 3 As shown, the width of the mounting groove 4 is equal to the thickness of the grid 3. When the mounting block 31 is limited by the step surface 41, it can simultaneously block the opening of the mounting groove 4 on the outside of the side plate 1, preventing the airflow from running from the opening of the mounting groove 4 on the outside of the side plate 1 to the outside of the side plate 1, so that the airflow is concentrated and discharged from the exhaust hole 5 on the partition 2. By controlling the direction of the airflow in the arc extinguishing cover, the speed at which the airflow drives the arc to move can be accelerated, thereby improving the arc extinguishing ability.

[0048] like Figure 6-7 As shown, the guide groove 7 is provided with a limit block 72, and the grid sheet 3 is provided with a limit slot 32 that is clamped in the upper limit position of the limit block 72. By clamping the limit slot 32 in the upper limit position of the limit block 72, the grid sheet 3 can be limited forward and backward to prevent the grid sheet 3 from moving along the guide groove 7. Of course, the limit block 72 and the limit slot 32 may not be provided. When the mounting block 31 is clamped in the step surface 41 for limitation, the end of the grid sheet 3 may be against the upper limit position of the partition 2 to prevent the grid sheet 3 from moving along the guide groove 7. The grid sheet 3 may also be spaced apart from the partition 2, which all belong to the protection scope of the present utility model.

[0049] Furthermore, the limiting block 72 is provided with a limiting surface on the side near the mounting groove 4, the limiting surface is flush with the step surface 41, the mounting block 31 constitutes at least one side wall of the limiting groove 32, and when the limiting groove 32 is engaged with the limiting block 72, the mounting block 31 contacts and limits the limiting surface. It is understandable that the limiting block 72 can also be set at a position farther from the mounting groove 4, so that the limiting surface is set separately from the step surface 41, and the mounting block 31 and the limiting groove 32 on the grid plate 3 can also be set separately, all of which belong to the protection scope of the present utility model.

[0050] Furthermore, the limit block 72 is provided with a first transition surface 73 formed by chamfering on the side away from the mounting groove 4. The first transition surface 73 is set at an oblique angle with the side plate 1. The first transition surface 73 is slidably matched with the grid plate 3, which makes it easy for the mounting block 31 to pass over the limit block 72, making it easier for the limit groove 32 to be stuck on the limit block 72, thereby reducing the difficulty of assembly.

[0051] Furthermore, the grid sheet 3 is provided with a second transition surface 33 on two sides corresponding to the two side panels 1, the second transition surface 33 is arranged at an oblique angle with the side panel 1, and the second transition surface 33 is slidably matched with the first transition surface 73, which can further reduce the difficulty of assembly. Of course, only one of the second transition surface 33 and the first transition surface 73 can be provided, or neither of them can be provided, which all fall within the protection scope of the present utility model.

[0052] Furthermore, a V-shaped arc-extinguishing notch 34 is provided on the side of the grid 3 away from the partition 2, and an arc-extinguishing groove 35 is provided at the bottom of the arc-extinguishing notch 34. The arc-extinguishing grooves 35 of two adjacent grids 3 are alternately inclined to both sides of the center line of the grid 3, so that the arc-extinguishing grooves 35 of two adjacent grids 3 are staggered. The arc-extinguishing notch 34 and the arc-extinguishing groove 35 can attract the arc and improve the arc-extinguishing effect.

[0053] like Figure 2-5 As shown, the two side plates 1 are connected by a top plate 8, the top plate 8 is arranged opposite to the outermost grille 3, one side of the top plate 8 is connected to the partition 2, the middle part of the side of the partition 2 away from the grille 3 is provided with a raised outer convex rib 21, the partition 2 is provided with two exhaust holes 5 on both sides of the outer convex rib 21, the exhaust holes 5 on both sides of the outer convex rib 21 are respectively arranged to be staggered to the projections on the outer convex rib 21, the four exhaust holes 5 are respectively three first exhaust holes 51 and one second exhaust hole 52, the first exhaust hole 51 is arranged correspondingly between two adjacent grilles 3, the exhaust hole 5 closest to the top plate 8 is the second exhaust hole 52, and the second exhaust hole 52 is larger than the first exhaust hole 51. The first exhaust hole 51 and the second exhaust hole 52 are connected to a clearance hole 6 closest to the top plate 8. The side of the partition plate 2 close to the grid sheet 3 is provided with a raised inner convex rib 22, and the inner convex rib 22 is flush with the hole wall of one side of the second exhaust hole 52. The inner convex rib 22 is arranged on the inner side of the outermost grid sheet 3. The inner convex rib 22 is inserted between two adjacent grid sheets 3 to limit the side of the grid sheet 3. The inner convex rib 22 can not only limit the grid sheet 3, but also increase the thickness of the arc extinguishing hood. In particular, the arc extinguishing hood has a thinner wall at the position of the inner convex rib 22. The thickness of this position can be increased by the inner convex rib 22 to avoid damage during processing, injection molding and subsequent use. The second exhaust hole 52 is larger than the first exhaust hole 51, which can ensure smooth airflow, especially when the airflow channel is long and narrow. By adding the second exhaust hole 52, the airflow can be smooth and the gas can be discharged quickly. In addition, it can also play a certain role in guiding the airflow and move the airflow toward the top plate 8.

[0054] Furthermore, the partition 2 is in a curved shape, and a first plane 23 and a second plane 24 are provided on the side of the partition 2 away from the grid plate 3, the first plane 23 and the second plane 24 are arranged at an oblique angle, the first plane 23 and the second exhaust hole 52 are arranged on both sides of the outer convex rib 21 relatively, the second plane 24 and the second exhaust hole 52 are arranged on the same side of the outer convex rib 21, and the second exhaust hole 52 is arranged between the second plane 24 and the top plate 8.

[0055] like Figure 1 As shown, the moving contact mechanism 200 includes a rotatably arranged contact support and a moving contact bridge penetrating the contact support, and the two ends of the moving contact bridge are respectively in contact with and separated from the two stationary contacts 100. Preferably, two contact grooves are provided on the radial side wall of the contact support of this embodiment, and the two ends of the moving contact bridge are respectively located in the contact grooves, and one end of the two stationary contacts 100 is respectively extended into the two contact grooves to cooperate with the moving contact bridge. In the process of the contact support driving the moving contact bridge to rotate, the end of the stationary contact 100 that cooperates with the moving contact bridge is always located in the contact groove, and the contact groove can play a role in isolating the arc. The other ends of the two stationary contacts 100 extend out of the switch unit housing and are located on the same side wall of the switch unit housing for plug-in cooperation. Furthermore, two arc extinguishing systems are arranged on opposite sides of the contact support, close to the position where the contact part of the moving contact bridge and the static contact 100 is located when the switch is opened. The contact contact groove is connected to the arc extinguishing system, and baffles are provided at both ends of the contact groove to guide the arc gas into the arc extinguishing system, which can improve the arc extinguishing efficiency.

[0056] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0057] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An arc extinguishing system, characterized in that: The arc extinguishing hood comprises an integral injection-molded arc extinguishing hood, the arc extinguishing hood comprising two side plates (1) arranged opposite to each other, and a partition plate (2) connected between the two side plates (1), a plurality of grid plates (3) are arranged between the two side plates (1), the inner sides of the two side plates (1) are respectively provided with mounting grooves (4) for mounting the grid plates (3), the partition plate (2) is provided with clearance holes (6) respectively corresponding to the mounting grooves (4) on the two side plates (1), and the clearance holes (6) are communicated with the corresponding mounting grooves (4).

2. The arc extinguishing system according to claim 1, characterized in that: A plurality of guide grooves (7) corresponding to the mounting grooves (4) are respectively provided on the inner sides of the two side plates (1); the guide grooves (7) are connected to the mounting grooves (4); the depth of the mounting grooves (4) is greater than the depth of the guide grooves (7); a step surface (41) is provided at the connection between the mounting grooves (4) and the guide grooves (7); the grid plate (3) is provided with a mounting block (31) for inserting into the mounting grooves (4); the mounting block (31) and the step surface (41) are limitedly matched.

3. The arc extinguishing system according to claim 2, characterized in that: The side plate (1) is provided with raised guide strips (11) on both sides of the guide groove (7), and the side surfaces of the guide strips (11) are flush with the groove walls of the guide groove (7). The guide strips (11) are inserted between two adjacent grid sheets (3) to limit the side surfaces of the grid sheets (3).

4. The arc extinguishing system according to claim 2, characterized in that: The mounting groove (4) connects the inner side and the outer side of the side plate (1); the opening of the mounting groove (4) on the inner side of the side plate (1) is used to insert the mounting block (31).

5. The arc extinguishing system according to claim 4, characterized in that: The width of the installation groove (4) is equal to the thickness of the grid plate (3), and the installation block (31) can block the opening of the installation groove (4) on the outside of the side plate (1).

6. The arc extinguishing system according to claim 2, characterized in that: A limit block (72) is provided in the guide groove (7), and the grid plate (3) is provided with a limit groove (32) that is engaged with the limit block (72) in an upper limit position.

7. The arc extinguishing system according to claim 6, characterized in that: The limiting block (72) is provided with a limiting surface on the side close to the mounting groove (4), the limiting surface being flush with the step surface (41), the mounting block (31) constituting at least one side groove wall of the limiting groove (32), and when the limiting groove (32) is engaged with the limiting block (72) in the upper limit position, the mounting block (31) contacts the limiting surface for limiting position.

8. The arc extinguishing system according to claim 6, characterized in that: The limiting block (72) is provided with a first transition surface (73) on the side away from the mounting groove (4), and the first transition surface (73) is arranged at an oblique angle with the side plate (1).

9. The arc extinguishing system according to claim 1, characterized in that: The grid plate (3) is provided with second transition surfaces (33) on two side edges corresponding to the two side plates (1), respectively. The second transition surfaces (33) are arranged at an oblique angle to the side plates (1).

10. The arc extinguishing system according to claim 1, characterized in that: A V-shaped arc-extinguishing notch (34) is provided on the side of the grid plate (3) away from the partition plate (2), an arc-extinguishing groove (35) is provided at the bottom of the arc-extinguishing notch (34), and the arc-extinguishing grooves (35) of two adjacent grid plates (3) are staggered.

11. The arc extinguishing system according to claim 1, characterized in that: The partition plate (2) is provided with a plurality of exhaust holes (5), and a core used for injection molding the mounting groove (4) on the side plate (1) is arranged parallel to the side plate (1) and parallel to an exhaust core used for molding the exhaust holes (5) on the injection molding partition plate (2).

12. The arc extinguishing system according to claim 1, characterized in that: The width of the clearance hole (6) is equal to the thickness of the side plate (1), and the clearance hole (6) is arranged corresponding to the side plate (1), and the core used for injection molding the mounting groove (4) on the side plate (1) extends into the molding cavity of the mold from a direction parallel to the side plate (1).

13. The arc extinguishing system according to claim 1, characterized in that: A raised outer convex rib (21) is provided in the middle of the side surface of the partition (2) away from the grid plate (3); exhaust holes (5) are respectively provided on both sides of the outer convex rib (21); and the exhaust holes (5) on both sides of the outer convex rib (21) are respectively projected onto the outer convex rib (21) in an offset manner.

14. The arc extinguishing system according to claim 1, characterized in that: The two side plates (1) are connected via a top plate (8), the top plate (8) is arranged opposite to an outermost grid plate (3), and one side of the top plate (8) is connected to the partition plate (2).

15. The arc extinguishing system according to claim 11, characterized in that: The partition plate (2) is provided with a first exhaust hole (51) serving as an exhaust hole (5), and the first exhaust hole (51) is arranged correspondingly between two adjacent grid sheets (3).

16. The arc extinguishing system according to claim 11, characterized in that: Among the plurality of exhaust holes (5), the exhaust hole (5) closest to the top guide plate (8) is the second exhaust hole (52), and the second exhaust hole (52) is connected to a clearance hole (6) closest to the top plate (8).

17. The arc extinguishing system according to claim 16, characterized in that: A raised inner rib (22) is provided on the side of the partition plate (2) close to the grille (3); the inner rib (22) is flush with a hole wall on one side of the second exhaust hole (52); the inner rib (22) is inserted between two adjacent grilles (3) to limit the side of the grille (3).

18. The arc extinguishing system according to claim 13, characterized in that: The partition (2) is in a curved shape. A first plane (23) and a second plane (24) are provided on a side of the partition (2) away from the grid plate (3). The first plane (23) and the second plane (24) are arranged at an oblique angle. The first plane (23) and the second exhaust hole (52) are arranged on opposite sides of the outer convex rib (21). The second plane (24) and the second exhaust hole (52) are arranged on the same side of the outer convex rib (21), and the second exhaust hole (52) is arranged between the second plane (24) and the top plate (8).

19. A rotary isolating switch, comprising an operating mechanism and at least one switch unit, wherein the operating mechanism and the switch unit are stacked, and the operating mechanism is connected to the switch unit to drive the switch unit to turn on or off, characterized in that: The switch unit comprises a switch unit housing, a contact system arranged in the switch unit housing and used in conjunction with the contact system, and two arc extinguishing systems as described in any one of claims 1 to 18, wherein the contact system comprises two stationary contacts (100) and a rotatable moving contact mechanism (200) located between the two stationary contacts (100), and the two arc extinguishing systems are respectively arranged on one side of the two stationary contacts (100), and one end of the operating mechanism is connected to the moving contact mechanism (200) of the switch unit as a driving end, so that the moving contact mechanism (200) and the stationary contact (100) are closed or disconnected to realize the closing or opening of the rotary disconnector.

20. The rotary disconnect switch according to claim 19, characterized in that: The moving contact mechanism (200) comprises a rotatably arranged contact support and a moving contact bridge penetrating the contact support, wherein two ends of the moving contact bridge respectively contact and separate with two stationary contacts (100), two contact grooves are provided on the radial side wall of the contact support, and two ends of the moving contact bridge are respectively located in the contact grooves, and one end of the two stationary contacts (100) respectively extends into the two contact grooves to cooperate with the moving contact bridge, and when the contact support drives the moving contact bridge to rotate, one end of the stationary contact (100) that cooperates with the moving contact bridge is always located in the contact groove.

21. The rotary disconnect switch according to claim 20, characterized in that: Two arc extinguishing systems are arranged on opposite sides of the contact support, the contact slot is communicated with the arc extinguishing system, and baffles are arranged at both ends of the contact slot to guide arc gas into the arc extinguishing system.

22. The rotary disconnect switch according to claim 20, characterized in that: The other ends of the two stationary contacts (100) extend out of the switch unit housing and are located on the same side wall of the switch unit housing.

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