Arc extinction structure of load isolation switch

Abstract

The utility model relates to the technical field of load isolation switches, in particular to an arc extinction structure of a load isolation switch, which comprises a shell, a sliding part is slidably connected to the middle of the shell, multiple groups of moving contacts are fixedly connected to two sides of the sliding part, and multiple groups of static contacts are fixedly connected to two sides of the shell. The plurality of groups of moving contacts are respectively abutted against and matched with the plurality of groups of static contacts, the plurality of groups of static contacts are fixedly connected with arc striking sheets, arc extinguishing ports are formed in two sides of the shell in a penetrating manner, the plurality of groups of arc striking sheets respectively correspond to the plurality of groups of arc extinguishing ports, grooves are formed in two sides of the outer wall of the shell, one sides of the two groups of grooves are rotatably connected with rotating shafts, and the side walls of the rotating shafts are fixedly connected with a plurality of groups of sealing plates; the driving assembly drives the rotating shaft to rotate, so that the sealing plate rotates, the arc extinguishing port is opened, when the electric arc does not need to be processed, the sealing plate covers one side of the arc extinguishing port in a sealing mode, the arc extinguishing port is closed, the arc extinguishing port is opened only when needed, the time for communicating the arc extinguishing port with air is shortened, the amount of dust entering the shell through the arc extinguishing port is reduced, and the service life of the switch is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of load isolating switches, in particular to an arc extinguishing structure of a load isolating switch. Background Art

[0002] A load isolation switch is a device that isolates the power-off part from the live part and creates an obvious disconnection point to isolate faulty equipment or perform power outage maintenance.

[0003] Existing load isolating switches, such as the arc extinguishing structure of a load isolating switch proposed in patent application number "CN201720703922.8", use structures such as a shell, an arc extinguishing device, an arc discharge channel, an arc extinguishing assembly, and an arc extinguishing sheet to neutralize the free gas after arc extinguishing under the action of the arc extinguishing sheet, and finally discharge it out of the switch shell along the arc discharge channel with the high-pressure airflow. At the same time, the outside air quickly enters the switch to cool the moving and static contacts, thereby realizing the functions of arc extinguishing, arc extinguishing, and pressure relief of the load isolating switch, thereby ensuring the service life and safety of the switch and equipment.

[0004] However, the arc discharge channel is connected to the air, and dust can easily enter the casing through the arc discharge channel. Dust accumulates to a certain extent over a long period of time, causing the electrical performance of the parts in the casing to be affected, affecting the heat dissipation of the parts, and easily causing internal structural failures of the switch, thereby reducing the service life of the switch. Therefore, an arc extinguishing structure for a load isolation switch is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide an arc extinguishing structure of a load isolating switch to solve the problems raised in the above background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] An arc extinguishing structure of a load isolating switch comprises a housing, a sliding part is slidably connected to the middle of the housing, multiple groups of moving contacts are fixedly connected to both sides of the sliding part, multiple groups of stationary contacts are fixedly connected to both sides of the housing, and the multiple groups of moving contacts are respectively abutted and matched with the multiple groups of stationary contacts;

[0008] Arc-striking pieces are fixedly connected to the multiple groups of static contacts, arc-extinguishing openings are opened through both sides of the shell, and the multiple groups of arc-striking pieces correspond to the multiple groups of arc-extinguishing openings respectively. Grooves are opened on both sides of the outer wall of the shell, and one side of the two groups of grooves is rotatably connected to a rotating shaft, and the side walls of the rotating shaft are fixedly connected to multiple groups of sealing plates, and the multiple groups of sealing plates are respectively fitted and sealed with the multiple groups of arc-extinguishing openings, and driving components for driving the rotating shaft to rotate are fixedly connected in the two groups of grooves.

[0009] Preferably, the driving assembly includes a micro servo motor, which is fixed inside the groove, a driving gear is fixed to the output end of the micro servo motor, a driven gear is fixed to the side wall of the rotating shaft, and the driving gear and the driven gear are meshed for transmission.

[0010] Preferably, a fixing frame is clamped at one end of the multiple groups of arc extinguishing openings close to the arc striking plate, and multiple groups of arc extinguishing grids are clamped inside the fixing frame. The multiple groups of arc extinguishing grids are arranged in a linear array, and the arc striking plate corresponds to the arc extinguishing grid.

[0011] Preferably, arc isolation plates and isolating metal meshes are clamped inside the multiple groups of arc extinguishing ports, the arc isolation plates are located between the isolating metal meshes and the fixed frame, the arc isolation plates and the isolating metal meshes are parallel to each other, and the arc isolation plates and the arc extinguishing grids are relatively perpendicular.

[0012] Preferably, a controller is fixedly connected to the inner wall of the shell, a conductive sheet is electrically fixedly connected to one end of the controller, an electric fuse is electrically fixedly connected to the middle of the conductive sheet, an end of the conductive sheet is located between the arc-striking sheet and the arc-extinguishing grid, and the controller is electrically connected to the servo motor.

[0013] Preferably, a plurality of groups of partitions are fixedly connected inside the shell, and the plurality of groups of partitions are respectively located between the plurality of groups of static contacts.

[0014] Beneficial effects of the utility model:

[0015] The utility model drives multiple groups of moving contacts and multiple groups of static contacts to close or open the switch through the sliding part, and the arc-striking piece guides the generated arc to the arc extinguishing port for processing. At the same time, the driving component drives the rotating shaft to rotate, so that the sealing plate rotates and the arc extinguishing port is opened. When there is no need to process the arc, the sealing plate covers one side of the arc extinguishing port to close the arc extinguishing port. The arc extinguishing port is opened only when needed, which reduces the time when the arc extinguishing port is connected to the air, reduces the amount of dust that enters the housing through the arc extinguishing port, and improves the service life of the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the shell of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the housing of the utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the arc extinguishing port of the utility model;

[0021] Figure 5 This is a schematic diagram of the sealing plate structure of the utility model;

[0022] The reference numerals in the figures are as follows:

[0023] 1. Housing; 3. Sliding part; 4. Moving contact; 5. Static contact; 6. Arc-striking plate; 7. Partition; 8. Arc-extinguishing port; 9. Fixed frame; 10. Arc-extinguishing grid; 11. Arc-isolating plate; 12. Isolating metal mesh; 13. Conductive sheet; 14. Electric fuse; 15. Controller; 16. Micro servo motor; 17. Driving gear; 18. Groove; 19. Rotating shaft; 20. Closing plate; 21. Driven gear. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] An arc extinguishing structure of a load isolating switch comprises a shell 1, a sliding portion 3 is slidably connected to the middle of the shell 1, the sliding portion 3 is controlled to slide by a switch handle, multiple groups of moving contacts 4 are fixedly connected to both sides of the sliding portion 3, multiple groups of stationary contacts 5 are fixedly connected to both sides of the shell 1, and the multiple groups of moving contacts 4 are respectively abutted and matched with the multiple groups of stationary contacts 5.

[0026] Arc-striking pieces 6 are fixedly connected to the multiple groups of static contacts 5, arc-extinguishing openings 8 are penetrated on both sides of the shell 1, and the multiple groups of arc-striking pieces 6 correspond to the multiple groups of arc-extinguishing openings 8 respectively. Grooves 18 are opened on both sides of the outer wall of the shell 1, and one side of the two groups of grooves 18 is rotatably connected to a rotating shaft 19. The side wall of the rotating shaft 19 is fixedly connected to multiple groups of sealing plates 20, and the multiple groups of sealing plates 20 are respectively fitted and sealed with the multiple groups of arc-extinguishing openings 8. A driving component for driving the rotating shaft 19 to rotate is fixedly connected in the two groups of grooves 18.

[0027] like Figure 1-Figure 5 As shown, the sliding part 3 drives multiple groups of moving contacts 4 and multiple groups of static contacts 5 to close or open the switch, and the arc-starting piece 6 guides the generated arc to the arc-extinguishing port 8 for processing. At the same time, the driving component drives the rotating shaft 19 to rotate, so that the sealing plate 20 rotates, and the arc-extinguishing port 8 opens. When there is no need to process the arc, the sealing plate 20 covers one side of the arc-extinguishing port 8 to close the arc-extinguishing port 8. The arc-extinguishing port 8 is opened only when needed, reducing the time that the arc-extinguishing port 8 is connected to the air, reducing the amount of dust entering the housing 1 through the arc-extinguishing port 8, and improving the service life of the switch.

[0028] The driving assembly includes a micro servo motor 16 , which is fixed inside the groove 18 , a driving gear 17 is fixed to the output end of the micro servo motor 16 , a driven gear 21 is fixed to the side wall of the rotating shaft 19 , and the driving gear 17 is meshed with the driven gear 21 for transmission.

[0029] like Figure 3-Figure 5 As shown, the micro servo motor 16 (model TF-N20FN20) drives the driving gear 17 to rotate, so that the driven gear 21 rotates, and the rotating shaft 19 drives the rotation, thereby controlling the sealing plate 20 to rotate.

[0030] A fixing frame 9 is clamped on one end of the arc extinguishing openings 8 close to the arc striking piece 6 , and a plurality of arc extinguishing grids 10 are clamped inside the fixing frame 9 . The plurality of arc extinguishing grids 10 are arranged in a linear array, and the arc striking piece 6 corresponds to the arc extinguishing grid 10 .

[0031] like Figure 3-Figure 4 As shown, the arc-starting piece 6 guides the arc to the fixing frame 9, and the multiple groups of arc-extinguishing grids 10 inside cut the arc.

[0032] Arc isolation plates 11 and insulating metal meshes 12 are clamped inside the multiple groups of arc extinguishing ports 8. The arc isolation plates 11 are located between the insulating metal meshes 12 and the fixed frame 9. The arc isolation plates 11 and the insulating metal meshes 12 are parallel to each other, and the arc isolation plates 11 and the arc extinguishing grids 10 are relatively perpendicular.

[0033] like Figure 3-Figure 4 As shown, the arc isolation plate 11 is punched with a plurality of holes to absorb arc ions and isolate the metal mesh 12, so that high-temperature and high-pressure gas can be ejected while reducing arcing to the outside.

[0034] A controller 15 is fixedly connected to the inner wall of the housing 1, one end of the controller 15 is electrically fixedly connected to a conductive sheet 13, the middle of the conductive sheet 13 is electrically fixedly connected to an electric fuse 14, the end of the conductive sheet 13 is located between the arc-striking sheet 6 and the arc-extinguishing grid 10, and the controller 15 is electrically connected to the servo motor.

[0035] like Figure 3 As shown, when the arc-striking plate 6 strikes an arc, the conductive plate 13 will be energized, and one end of the controller 15 will be grounded, so that the controller 15 will close the circuit, the controller 15 will be charged, and the servo motor will be controlled to open the sealing plate 20. When the arc disappears, the controller 15 will be powered off, and the remaining power will control the servo motor to close the sealing plate 20. The electric fuse 14 will melt and break when the voltage on the conductive plate is large, thereby protecting the controller 15.

[0036] A plurality of partition plates 7 are fixedly connected inside the housing 1 , and the plurality of partition plates 7 are respectively located between the plurality of static contact points.

[0037] like Figure 2 As shown, the partition 7 separates the multiple groups of static contacts from the closing position of the moving contacts, thereby improving the operating stability of the switch.

[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An arc extinguishing structure for a load isolating switch, comprising a housing (1), characterized in that: The middle part of the housing (1) is slidably connected to a sliding part (3), both sides of the sliding part (3) are fixedly connected to multiple groups of moving contacts (4), both sides of the housing (1) are fixedly connected to multiple groups of stationary contacts (5), and the multiple groups of moving contacts (4) are respectively abutted and matched with the multiple groups of stationary contacts (5); Multiple groups of the static contacts (5) are fixedly connected with arc-striking pieces (6), arc-extinguishing openings (8) are provided through both sides of the housing (1), and the multiple groups of arc-striking pieces (6) correspond to the multiple groups of arc-extinguishing openings (8), and grooves (18) are provided on both sides of the outer wall of the housing (1). One side of the two groups of grooves (18) is rotatably connected with a rotating shaft (19), and the side wall of the rotating shaft (19) is fixedly connected with multiple groups of sealing plates (20), and the multiple groups of sealing plates (20) are respectively fitted and sealed with the multiple groups of arc-extinguishing openings (8), and a driving component for driving the rotating shaft (19) to rotate is fixedly connected in the two groups of grooves (18).

2. The arc extinguishing structure of a load isolating switch according to claim 1, characterized in that: The driving assembly comprises a micro servo motor (16), the micro servo motor (16) is fixedly connected to the inside of the groove (18), the output end of the micro servo motor (16) is fixedly connected to a driving gear (17), the side wall of the rotating shaft (19) is fixedly connected to a driven gear (21), and the driving gear (17) and the driven gear (21) are meshed and transmitted.

3. The arc extinguishing structure of a load isolating switch according to claim 1, characterized in that: A fixing frame (9) is clamped on one end of the plurality of arc extinguishing openings (8) close to the arc striking piece (6), and a plurality of arc extinguishing grid pieces (10) are clamped inside the fixing frame (9). The plurality of arc extinguishing grid pieces (10) are arranged in a linear array, and the arc striking piece (6) corresponds to the arc extinguishing grid pieces (10).

4. The arc extinguishing structure of a load isolating switch according to claim 3, characterized in that: An arc isolation plate (11) and an isolating metal mesh (12) are clamped inside the plurality of groups of arc extinguishing ports (8); the arc isolation plate (11) is located between the isolating metal mesh (12) and the fixing frame (9); the arc isolation plate (11) and the isolating metal mesh (12) are parallel to each other; and the arc isolation plate (11) and the arc extinguishing grid (10) are relatively perpendicular to each other.

5. The arc extinguishing structure of a load isolating switch according to claim 2, characterized in that: A controller (15) is fixedly connected to the inner wall of the housing (1), one end of the controller (15) is electrically fixedly connected to a conductive sheet (13), the middle of the conductive sheet (13) is electrically fixedly connected to an electric fuse (14), the end of the conductive sheet (13) is located between an arc striking sheet (6) and an arc extinguishing grid sheet (10), and the controller (15) is electrically connected to a servo motor.

6. The arc extinguishing structure of a load isolating switch according to claim 1, characterized in that: A plurality of groups of partition plates (7) are fixedly connected inside the housing (1), and the plurality of groups of partition plates (7) are respectively located between the plurality of groups of static contacts.

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