A vacuum interrupter and a method of assembling the same

Abstract

The application discloses a vacuum arc-extinguishing chamber and an assembling method thereof, and belongs to the technical field of vacuum arc-extinguishing chambers. The vacuum arc-extinguishing chamber comprises a chamber shell, an arc-extinguishing component is arranged in the chamber shell, a sealing mechanism is arranged in the chamber shell, the sealing mechanism comprises a bellows pipe fitting arranged on the outer surface of the arc-extinguishing component, the bellows pipe fitting is composed of a plurality of bellows pipe fittings, a cleaning mechanism is arranged in the chamber shell, and the cleaning mechanism comprises a circular arc plate arranged on the outer surface of the arc-extinguishing component. The inner clamping plate and the outer clamping plate are used for bidirectional scraping of the surface of the bellows pipe body, the outer surface of the outer clamping plate close to the bellows pipe fitting is provided with a material collecting hole, and the collected impurity dust can be collected; the inner surface of the inner clamping plate close to the bellows pipe fitting is fixedly provided with a cleaning protruding block, and the cleaning protruding block can more effectively remove the pollutants. The cleaning mode can completely remove the pollutants on the surface of the bellows pipe, maintains the insulation performance of the vacuum arc-extinguishing chamber, and guarantees the safe and stable operation of the power system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vacuum interrupter, in particular to a vacuum interrupter and an assembling method thereof. BACKGROUND

[0002] As a core component of high-voltage switchgear, the vacuum interrupter plays a vital role in the power system. Its main function is to extinguish the arc quickly and reliably during the opening and closing operation, thereby cutting off or connecting the circuit, and ensuring the safe and stable operation of the power system.

[0003] During actual manufacturing, transportation, installation and use, contaminants such as oil, oxides, metal chips or dust will inevitably remain on the surface of the bellows. Under the action of high vacuum environment and strong electric field, these contaminants will cause internal vacuum breakdown of the bellows, greatly reduce the insulation level, and further cause opening failure, which seriously affects the normal operation of the power system. In addition, due to its structural characteristics, the bellows will bear a large stress during operation, especially at the wave crest and wave trough, and fatigue damage will occur after long-term use, resulting in deformation and rupture of the bellows, and thus losing the sealing function. SUMMARY

[0004] The purpose of the present application is to provide a vacuum interrupter and an assembling method thereof to solve the problem of contaminants causing internal vacuum breakdown of the bellows under the action of high vacuum environment and strong electric field, greatly reducing the insulation level, and further causing opening failure.

[0005] To achieve the above purpose, the present application provides the following technical solution: a vacuum interrupter, comprising a chamber shell, an arc-extinguishing component installed inside the chamber shell, a sealing mechanism provided inside the chamber shell, the sealing mechanism comprising a bellows pipe installed on the outer surface of the arc-extinguishing component, the bellows pipe being composed of a plurality of bellows pipes, a cleaning mechanism provided inside the chamber shell, the cleaning mechanism comprising a circular arc plate installed on the outer surface of the arc-extinguishing component, a moving rail installed on one side of the circular arc plate, a driving member provided on the moving rail, a telescopic member fixedly installed at the output end of the driving member, an outer clamping plate and an inner clamping plate respectively provided on the two side surfaces of the bellows pipe, a first spring installed between the outer clamping plate and the inner clamping plate, and the inner clamping plate and the output end of the telescopic member being fixedly connected.

[0006] As a preferred technical solution of the present application, the outer clamping plate is provided with a material collecting hole near the outer surface of the bellows pipe, and the inner part of the outer clamping plate is provided with a material storage cavity for storing impurities and dust.

[0007] As a preferred technical scheme of the present application, the inner clamping plate is fixedly installed with a cleaning protrusion close to the inner surface of the bellows pipe, and the inner clamping plate is internally installed with a plurality of elastic supporting frames.

[0008] As a preferred technical scheme of the present application, the bellows pipe is internally provided with a sealing mechanism, the sealing mechanism comprises a plurality of damping springs fixedly installed inside the bellows pipe, the bellows pipe is provided with a plurality of through holes close to the surface of the arc extinguishing component, and the bellows pipe is installed with a gas permeable film close to the surface of the through holes.

[0009] As a preferred technical scheme of the present application, the bellows pipe is fixedly installed with an adsorptive bulge close to the surface of the through holes, and the adsorptive bulge is internally filled with carbon powder for adsorbing moisture.

[0010] As a preferred technical scheme of the present application, the chamber shell is internally installed with an inner sealing cavity, and the bellows pipe is located inside the inner sealing cavity.

[0011] As a preferred technical scheme of the present application, the top end of the chamber shell is provided with a pressure buffering assembly, the pressure buffering assembly comprises a box cover fixedly installed at the top end of the chamber shell for stabilizing the air pressure inside the bellows pipe, both ends of the box cover are communicatedly installed with air supply plates, and air tubes are communicatedly installed between the air supply plates and the bellows pipe.

[0012] As a preferred technical scheme of the present application, both ends of the chamber shell are installed with sealing plates, sealing gaskets are installed between the sealing plates and the chamber shell, the chamber shell is provided with a limiting mechanism, the limiting mechanism comprises a cylinder installed inside the chamber shell, slide rods are slidingly installed at both ends of the cylinder, pistons are arranged at one end of the slide rods located inside the cylinder, the middle position of the cylinder is communicated with a cavity, and the free ends of the slide rods are fixedly connected with the sealing plates through pressing plates.

[0013] As a preferred technical scheme of the present application, both ends of the chamber shell close to the arc extinguishing component are installed with end connecting pieces, and the middle of the arc extinguishing component is provided with a soft connecting plate for pressurizing and stabilizing the arc extinguishing component.

[0014] As a preferred technical scheme of the present application, a method for assembling a vacuum arc extinguishing chamber comprises the following steps:

[0015] Step one: prepare all parts, including the chamber shell, the arc extinguishing component, the bellows pipe, the box cover, the sealing plate, the end connecting piece, the soft connecting piece and other auxiliary parts, and check whether each part is intact;

[0016] Step two: fix the damping spring inside the corrugated pipe, fix the sealing box at the top of the chamber shell, and connect the sealing box with the corrugated pipe;

[0017] Step three: place the arc extinguishing component in the designated position inside the chamber shell, install the corrugated pipe composed of multiple corrugated pipes on the outer surface of the arc extinguishing component, and then install the cleaning mechanism on the surface of the arc extinguishing component close to the corrugated pipe;

[0018] Step four: install the sealing washer on the sealing plate, and then install the sealing plate at both ends of the chamber shell, and realize the sealing of the chamber shell through the negative pressure adsorption of the slide rod and the cylinder;

[0019] Step five: pump the sealed cavity, the chamber shell and the inner cavity through the air pump to ensure that the arc extinguishing component is in an absolute vacuum environment, so as to realize the installation of the arc extinguishing chamber.

[0020] Compared with the prior art, the beneficial effects of the present application are:

[0021] 1、The present application sets a cleaning mechanism inside the chamber shell, and drives the telescopic member by the driving member to scrape the surface of the corrugated pipe body in both directions by the inner clamping plate and the outer clamping plate, the outer clamping plate is provided with a material collecting hole close to the outer surface of the corrugated pipe, and a material storage cavity is arranged inside the material collecting hole to collect the scraped impurities and dust, and the inner clamping plate is fixedly installed with a cleaning protrusion close to the inner surface of the corrugated pipe, which can more effectively remove the pollutants, and the cleaning method can completely remove the pollutants on the surface of the corrugated pipe to ensure the cleanliness of the surface and maintain the insulation performance of the vacuum arc chamber, and ensure the safe and stable operation of the power system.

[0022] 2、The present application makes the surface of the cleaned corrugated pipe uniform and smooth, and the uniform surface can improve the electric field distribution inside the vacuum arc chamber, reduce the electric field strength, and reduce the phenomenon of electric field concentration, which not only improves the insulation performance and arc extinguishing capacity of the vacuum arc chamber, but also is beneficial to the miniaturization design of the equipment, meets the compactness requirement of the equipment in the power industry, and reduces the equipment area and cost.

[0023] 3、The present application sets multiple damping springs inside the corrugated pipe, and sets a pressure relief assembly at the top of the chamber shell, and through the air suction and exhaust of the sealing box, cooperates with the damping spring inside the corrugated pipe body, can adjust the air pressure inside the corrugated pipe body, when the air pressure inside the corrugated pipe is too high or too low, the pressure relief assembly can be adjusted in time, avoids the deformation of the corrugated pipe due to abnormal air pressure, thereby prolongs the service life of the corrugated pipe, and improves the reliability and stability of the vacuum arc chamber.

[0024] 4、The sealing plate is installed at both ends of the chamber shell, and the sealing gasket is installed between the sealing plate and the chamber shell, the sealing property of the chamber shell is enhanced, meanwhile, the limiting mechanism is arranged, the sealing plate is connected with the chamber shell tightly through the negative pressure adsorption of the slide rod and the cylinder, the sealing effect is further improved, the double sealing design effectively prevents external gas from entering the arc-extinguishing chamber, ensures the high vacuum environment inside, and improves the working reliability and safety of the vacuum arc-extinguishing chamber.

[0025] 5、The corrugated pipe is located inside the inner sealing cavity, a relatively independent working environment is provided for the corrugated pipe, the influence of external factors on the corruggated pipe is reduced, and the soft connecting plate arranged in the arc-extinguishing component can be used for pressurizing and stabilizing the arc-extinguishing component, and the stability of the arc-extinguishing component is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a whole structure schematic view of the present application;

[0027] Figure 2 It is an internal structure schematic view of the chamber shell of the present application;

[0028] Figure 3 It is a structure schematic view of the arc-extinguishing component of the present application;

[0029] Figure 4 It is a structure schematic view of the cylinder of the present application;

[0030] Figure 5 It is a structure schematic view of the inner sealing cavity of the present application;

[0031] Figure 6 It is an internal structure schematic view of the corrugated pipe of the present application;

[0032] Figure 7 It is a structure schematic view of the outer pressure plate and the inner pressure plate of the present application;

[0033] Figure 8 It is a sectional structure schematic view of the outer pressure plate and the inner pressure plate of the present application.

[0034] In the drawing: 1, chamber shell; 2, sealing plate; 3, sealing mechanism; 31, corrugated pipe; 32, damping spring; 33, adsorptive bulge; 34, through hole; 35, air-permeable film; 36, pressure relief assembly; 361, box cover; 362, air supply plate; 363, air pipe; 4, arc-extinguishing component; 5, soft connecting plate; 6, end connecting piece; 7, cleaning mechanism; 71, arc plate; 72, moving rail; 73, driving piece; 74, telescopic piece; 75, outer clamping plate; 76, inner clamping plate; 77, cleaning protrusion; 78, first spring; 79, material collecting hole; 710, elastic support frame; 8, limiting mechanism; 81, cavity; 82, pressure plate; 83, slide rod; 84, cylinder; 9, inner sealing cavity; 10, sealing gasket. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0036] Please refer to Figures 1-8 The present application provides a technical scheme of a vacuum arc-extinguishing chamber and an assembling method thereof: a vacuum arc-extinguishing chamber, comprising a chamber shell 1, an arc-extinguishing component 4 is installed inside the chamber shell 1, a sealing mechanism 3 is arranged inside the chamber shell 1, the sealing mechanism 3 comprises a bellows pipe fitting 31 installed on the outer surface of the arc-extinguishing component 4, the bellows pipe fitting 31 is composed of a plurality of bellows-shaped pipe fittings, a cleaning mechanism 7 is arranged inside the chamber shell 1, the cleaning mechanism 7 comprises a circular arc plate 71 installed on the outer surface of the arc-extinguishing component 4, a moving rail 72 is installed on one side of the circular arc plate 71, a driving piece 73 is arranged on the moving rail 72, an output end of the driving piece 73 is fixedly installed with an extension piece 74, outer clamping plates 75 and inner clamping plates 76 are arranged on the two side surfaces of the bellows pipe fitting 31 respectively, a first spring 78 is installed between the outer clamping plates 75 and the inner clamping plates 76, and the inner clamping plates 76 are fixedly connected with the output end of the extension piece 74.

[0037] Among them, the arc-extinguishing component 4 is arranged inside the chamber shell 1 to realize the arc-extinguishing function, and the bellows pipe fitting 31 composed of a plurality of bellows-shaped pipe fittings is arranged as part of the sealing mechanism 3, the bellows pipe fitting 31 can compensate the displacement of the contact through its flexible deformation when the movable contact is actuated to open and close, so as to ensure the high-vacuum sealing property inside the arc-extinguishing chamber and avoid the entry of external gas or impurities to damage the insulation performance; the cleaning mechanism 7 is installed on the outer surface of the arc-extinguishing component 4 through the circular arc plate 71, the extension piece 74 is driven by the driving piece 73 to move on the surface of the circular arc plate 71, so as to clean the surface of the bellows pipe fitting 31 by the inner clamping plates 76 and the outer clamping plates 75, and the first spring 78 provides a certain elastic action to ensure the good contact of the inner clamping plates 76 and the outer clamping plates 75 with the bellows pipe fitting 31.

[0038] In some embodiments, the outer clamping plates 75 are provided with material collecting holes 79 close to the outer surface of the bellows pipe fitting 31, and the inner part of the outer clamping plates 75 is provided with a material storage cavity for storing impurity dust.

[0039] During the cleaning process, the outer clamping plate 75 scrapes off the impurities and dust on the surface of the bellows pipe 31, and the impurities and dust enter the storage cavity through the collection holes 79 and are stored, which can effectively collect the impurities and dust scraped off from the surface of the bellows pipe 31 during the cleaning process, prevent the impurities and dust from polluting the surface of the bellows pipe 31 again or entering the inside of the arc extinguishing chamber, ensure the cleaning effect, and maintain the insulation performance of the vacuum arc extinguishing chamber.

[0040] In some embodiments, the inner clamping plate 76 is fixedly installed with a cleaning protrusion 77 close to the inner surface of the bellows pipe 31, and a plurality of elastic support frames 710 are installed inside the inner clamping plate 76.

[0041] The cleaning protrusion 77 can enhance the cleaning strength on the inner surface of the bellows pipe 31, the elastic support frames 710 provide elastic support for the inner clamping plate 76, the elastic support frames 710 ensure the close contact between the inner clamping plate 76 and the inner surface of the bellows pipe 31, adapt to the shape change of the bellows pipe 31, and further improve the comprehensiveness and effectiveness of cleaning.

[0042] In some embodiments, the inside of the bellows pipe 31 is provided with a sealing mechanism 3, the sealing mechanism 3 includes a plurality of damping springs 32 fixedly installed inside the bellows pipe 31, a plurality of through holes 34 are formed on the surface of the bellows pipe 31 close to the arc extinguishing component 4, and a gas permeable film 35 is installed on the surface of the bellows pipe 31 close to the through holes 34.

[0043] The damping springs 32 can buffer and stabilize the expansion and contraction movement of the bellows pipe 31, can disperse the stress generated by the bellows pipe 31 during the expansion and contraction process, reduce the fatigue damage of the bellows pipe 31, the through holes 34 and the gas permeable film 35 allow gas exchange under certain conditions, prevent impurities from entering the inside of the bellows pipe 31, and maintain the cleanliness and normal working state of the inside of the bellows pipe 31.

[0044] In some embodiments, the surface of the bellows pipe 31 close to the through holes 34 is fixedly installed with an adsorptive bulge 33, and the inside of the adsorptive bulge 33 is filled with carbon powder for adsorbing moisture.

[0045] When there is moisture in the surrounding environment of the bellows pipe 31, the moisture can contact the adsorptive bulge 33 through the through holes 34 and the gas permeable film 35, and the carbon powder adsorbs the moisture, preventing the moisture from corroding the bellows pipe and affecting its electrical performance, ensuring the normal operation of the bellows pipe in a humid environment, and improving the reliability and stability of the vacuum arc extinguishing chamber.

[0046] In some embodiments, the inside of the chamber shell 1 is installed with an inner sealing cavity 9, and the bellows pipe 31 is located inside the inner sealing cavity 9.

[0047] The inner sealing cavity 9 provides a relatively independent space for the bellows pipe 31, reduces the influence of external factors on the bellows pipe 31, further enhances the sealing performance of the bellows pipe 31, reduces the erosion of external gas, impurities and moisture on the bellows pipe 31, improves the working stability and service life of the bellows pipe 31, and thus guarantees the overall performance of the vacuum arc-extinguishing chamber.

[0048] In some embodiments, the top end of the chamber shell 1 is provided with a pressure relief assembly 36, which includes a box 361 fixedly installed at the top end of the chamber shell 1 for stabilizing the internal gas pressure of the bellows pipe 31. Both ends of the box 361 are communicated with a gas supply plate 362, and the gas supply plate 362 and the bellows pipe 31 are communicated with a gas pipe 363.

[0049] The box 361 can perform gas suction and exhaust operations according to the change of the internal gas pressure of the bellows pipe 31, adjust the internal gas pressure of the bellows pipe 31, and adjust the internal gas pressure of the bellows pipe 31 in real time, so as to avoid the deformation of the bellows pipe 31 due to excessively high or low internal gas pressure, reduce the damage of the bellows pipe 31, prolong the service life thereof, and ensure the normal operation of the vacuum arc-extinguishing chamber under various working conditions.

[0050] In some embodiments, the chamber shell 1 is provided with a sealing plate 2 at both ends, and a sealing gasket 10 is installed between the sealing plate 2 and the chamber shell 1. The chamber shell 1 is provided with a limiting mechanism 8, which includes a cylinder 84 installed inside the chamber shell 1. Both ends of the cylinder 84 are slidably installed with a slide rod 83. One end of the slide rod 83 located inside the cylinder 84 is provided with a piston. The middle position of the cylinder 84 is communicated with a cavity 81. The free end of the slide rod 83 is fixedly connected with the sealing plate 2 through a pressing plate 82.

[0051] When the sealing plate 2 is installed, the sealing plate 2 and the sealing gasket 10 enhance the sealing performance of both ends of the chamber shell 1, prevent external gas from entering the arc-extinguishing chamber, and ensure the stable operation of the arc-extinguishing chamber by vacuumizing the inside of the chamber shell 1 through an external air pump. At the same time, the arc-extinguishing component 4 is heat-insulated by vacuumizing the inner wall of the chamber shell 1, reduces the influence of the external environment on the arc-extinguishing component 4, and performs vacuumization at the same time. The inside of the cylinder 84 is vacuumized, so that the slide rod 83 is contracted. At this time, the slide rod 83 moves to generate negative pressure in the cylinder 84, realizes the stable installation of the sealing plate 2, guarantees the sealing effect of the chamber shell 1, and maintains the high-vacuum environment inside the arc-extinguishing chamber.

[0052] In some embodiments, the chamber shell 1 is provided with an end connecting piece 6 at both ends close to the arc-extinguishing component 4. The middle of the arc-extinguishing component 4 is provided with a soft connecting plate 5 for pressurizing and stabilizing the arc-extinguishing component 4.

[0053] The soft connecting plate 5 is arranged in the arc extinguishing component 4, and the soft connecting plate 5 can increase the pressure of the arc extinguishing component 4, reduce the vibration and displacement of the arc extinguishing component 4 during the working process, improve the arc extinguishing effect and the reliability of the vacuum arc extinguishing chamber, the end connecting piece 6 ensures the reliable connection between the arc extinguishing component 4 and the chamber shell 1, and improves the stability of the overall structure.

[0054] Working principle: first, the corrugated pipe fitting 31 is arranged in the vacuum arc extinguishing chamber, when the movable contact is actuated to open and close, the corrugated pipe fitting 31 can compensate the displacement of the contact through the flexible deformation of the corrugated pipe fitting 31, ensure the high vacuum sealing property of the arc extinguishing chamber, avoid the external gas or impurities from entering to damage the insulation performance, and when arc extinguishing, the driving part 73 drives the telescopic part 74 to move on the surface of the circular arc plate 71, and then the inner clamping plate 76 and the outer clamping plate 75 clean the surface of the corrugated pipe fitting 31, wherein the outer clamping plate 75 scrapes the impurities and dust on the surface of the corrugated pipe fitting 31, the impurities and dust enter the storage cavity through the material collecting hole 79 and are stored, the impurities and dust scraped from the surface of the corrugated pipe fitting 31 during the cleaning process can be effectively collected, the impurities and dust are prevented from polluting the surface of the corrugated pipe fitting 31 again or entering the inside of the arc extinguishing chamber, and the cleaning block 77 arranged on the surface of the inner clamping plate 76 can enhance the cleaning strength of the inner surface of the corrugated pipe fitting 31, ensure the cleaning effect and maintain the insulation performance of the vacuum arc extinguishing chamber.

[0055] In the description of the present application, only the preferred specific embodiments of the present application are described, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A vacuum interrupter comprising a chamber housing (1), characterized in that: The inside of the chamber shell (1) is internally provided with an arc extinguishing component (4), the inside of the chamber shell (1) is provided with a sealing mechanism (3) and a cleaning mechanism (7); The sealing mechanism (3) comprises a bellows pipe (31) installed on the outer surface of the arc extinguishing component (4), the bellows pipe (31) is composed of a plurality of bellows pipes, a plurality of damping springs (32) are fixedly installed in the inside of the bellows pipe (31), an adsorptive bulge (33) is fixedly installed on the surface of the bellows pipe (31) close to the arc extinguishing component (4), and the adsorptive bulge (33) is filled with carbon powder for adsorbing moisture; The top end of the chamber shell (1) is provided with a pressure relief assembly (36), the pressure relief assembly (36) comprises a box cover (361) fixedly installed on the top end of the chamber shell (1), air supply plates (362) are communicatively installed at both ends of the box cover (361), and air pipes (363) are communicatively installed between the air supply plates (362) and the bellows pipe (31), the box cover (361) is used for stabilizing the air pressure in the inside of the bellows pipe (31). The cleaning mechanism (7) comprises a circular arc plate (71) installed on the outer surface of the arc extinguishing component (4), outer clamping plates (75) and inner clamping plates (76) arranged on the two side surfaces of the bellows pipe (31), one side of the circular arc plate (71) is provided with a moving rail (72), the moving rail (72) is provided with a driving element (73), the output end of the driving element (73) is fixedly provided with an extension element (74), and the inner clamping plate (76) and the output end of the extension element (74) are fixedly connected; a first spring (78) is installed between the outer clamping plate (75) and the inner clamping plate (76), a plurality of material collecting holes (79) are formed in the outer surface of the outer clamping plate (75) close to the bellows pipe (31), a material storage cavity for storing impurity dust is formed in the inside of the outer clamping plate (75), a cleaning protrusion (77) is fixedly installed on the inner surface of the inner clamping plate (76) close to the bellows pipe (31), and a plurality of elastic supporting frames (710) are installed in the inside of the inner clamping plate (76).

2. A vacuum interrupter according to claim 1, characterized in that: A plurality of through holes (34) are formed in the surface of the bellows pipe (31) close to the arc extinguishing component (4), and air permeable films (35) are installed on the surface of the bellows pipe (31) close to the through holes (34).

3. A vacuum interrupter according to claim 1, characterized in that: An inner sealing cavity (9) is installed in the inside of the chamber shell (1), and the bellows pipe (31) is located in the inside of the inner sealing cavity (9).

4. The vacuum interrupter of claim 1 wherein: Sealing plates (2) are installed at both ends of the chamber shell (1), sealing gaskets (10) are installed between the sealing plates (2) and the chamber shell (1), and a limiting mechanism (8) is arranged on the chamber shell (1), the limiting mechanism (8) comprises a cylinder (84) installed in the inside of the chamber shell (1), slide rods (83) are slidably installed at both ends of the cylinder (84), pistons are arranged at one end of the slide rods (83) located in the inside of the cylinder (84), the middle position of the cylinder (84) is in communication with a cavity (81), and the free ends of the slide rods (83) are fixedly connected with the sealing plates (2) through pressing plates (82).

5. The vacuum interrupter of claim 1 wherein: The chamber shell (1) is provided with end connecting members (6) at both ends close to the arc extinguishing member (4), and the arc extinguishing member (4) is provided with a soft connecting plate (5) in the middle for pressurizing and stabilizing the arc extinguishing member (4).

6. The assembly method of the vacuum arc extinguishing chamber according to claim 1, wherein the assembly steps are as follows: Step one: prepare all parts, including the chamber shell (1), the arc extinguishing member (4), the corrugated pipe (31), the sealing box (361), the sealing plate (2), the end connecting member (6), the soft connecting member and other auxiliary parts, and check whether each part is intact; Step two: fix and install the damping springs (32) inside the corrugated pipe (31), fix and install the sealing box (361) at the top end of the chamber shell (1), and make the sealing box (361) communicate with the corrugated pipe (31); Step three: place the arc extinguishing member (4) to the designated position inside the chamber shell (1), install the corrugated pipe (31) composed of multiple corrugated pipes on the outer surface of the arc extinguishing member (4), and then install the cleaning mechanism (7) on the surface of the arc extinguishing member (4) close to the corrugated pipe (31); Step four: install the sealing gasket (10) on the sealing plate (2), and then install the sealing plate (2) at both ends of the chamber shell (1), and realize the sealing of the chamber shell (1) through the negative pressure adsorption of the slide rod (83) and the cylinder (84); Step five: perform air extraction on the sealed cavity, the chamber shell (1) and the inner cavity through the air pump, ensure that the arc extinguishing member (4) is in an absolute vacuum environment, and thus realize the installation of the arc extinguishing chamber.

Images