Direct-acting sealing device of vacuum circuit breaker

Abstract

The utility model discloses a vacuum circuit breaker direct-acting sealing device, which relates to the field of vacuum circuit breakers and comprises a frame body, a support frame is fixedly mounted at the top of the frame body, insulating parts are uniformly arranged at the top of the frame body and positioned in the middle of the support frame, the tail ends of the insulating parts penetrate through the frame body, and a cover plate is fixedly mounted at the top of each insulating part. The top of the cover plate is fixedly connected with a movable conducting rod, the top of the movable conducting rod is fixedly connected with a corrugated pipe, and the top of the corrugated pipe is provided with a vacuum arc-extinguishing chamber. By arranging the sealing sleeve plate, the second sealing gasket and the second sealing gasket, the sealing device can be installed, the contact between the external environment and the internal structure is effectively isolated, the sealing performance of the vacuum circuit breaker is ensured, the sealing effect of the sealing device can be improved by arranging the first sealing gasket and the reinforcing sleeve plate, and the positioning bolt and the fastening bolt are arranged, so that the sealing effect of the vacuum circuit breaker is improved. And the direct-acting sealing device arranged on the vacuum circuit breaker can be disassembled.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum circuit breakers, in particular to a direct-acting sealing device for a vacuum circuit breaker. Background Technique

[0002] A vacuum circuit breaker is a circuit breaker that uses vacuum as the insulating and arc-extinguishing medium between contacts, and is particularly suitable for use places that require oil-free, less maintenance and frequent operation. Among them, a direct-acting sealing device is usually used when assembling a vacuum interrupter.

[0003] When the existing direct-acting sealing device is in use, oil sealing is often adopted, but the sealing effect is not good, which is inconvenient for users to use, reduces the practicability of the vacuum circuit breaker, and is prone to air leakage.

[0004] In order to overcome the above defects, the prior art (Chinese patent with application number: 201920194486.5, application date: February 13, 2019) discloses a sealing device for a vacuum circuit breaker. The sealing device compensates for the gap between the guide sleeve and the ceramic shell by setting a strip-shaped sealing pad, thereby ensuring the sealing performance between the guide sleeve and the ceramic shell. By setting a pressing plate, the sealing pad is pressed downward, so as to further seal the guide sleeve and the ceramic shell through extrusion deformation.

[0005] Although the prior art can solve the sealing of the vacuum circuit breaker, the strip-shaped sealing pad set in the sealing device may be gradually aged and worn due to factors such as temperature, pressure, and medium during long-term use, which will lead to a decline in sealing performance. And if the pressure of the pressing plate is set improperly or loosens during use, it may cause uneven stress on the sealing pad, thereby affecting the sealing performance. At the same time, the complex structure may also make the installation and disassembly of the sealing device more difficult.

[0006] Therefore, we propose a direct-acting sealing device for a vacuum circuit breaker, which can well solve the above problems. Content of the Utility Model

[0007] The purpose of the utility model is to provide a direct-acting sealing device for a vacuum circuit breaker to solve the problems mentioned in the above background technique that when the direct-acting sealing device of the vacuum circuit breaker on the current market is in use, due to the strip-shaped sealing pad set in the sealing device, it may be gradually aged and worn due to factors such as temperature, pressure, and medium during long-term use, which will lead to a decline in sealing performance. And if the pressure of the pressing plate is set improperly or loosens during use, it may cause uneven stress on the sealing pad, thereby affecting the sealing performance. At the same time, the complex structure may also make the installation and disassembly of the sealing device more difficult.

[0008] To achieve the above object, the utility model provides the following technical solution: a direct-acting sealing device for a vacuum circuit breaker, including a frame body, a support frame is fixedly installed at the top of the frame body, insulating parts are evenly arranged in the middle of the support frame at the top of the frame body, and the ends of the insulating parts penetrate through the frame body. A cover plate is fixedly installed at the top of the insulating parts, a moving conducting rod is fixedly connected to the top of the cover plate, a bellows is fixedly connected to the top of the moving conducting rod, a vacuum interrupter is arranged at the top of the bellows, and a high-voltage input end is arranged at the top of the vacuum interrupter;

[0009] It further includes: two sealing sleeve plates are sleeved on the outer wall of the cover plate, a clamping ring plate is fixedly installed at the top of the sealing sleeve plate, and the clamping ring plate wraps the outer wall of the bellows;

[0010] Two reinforcing sleeve plates are sleeved on the outer wall of the sealing sleeve plate, a cavity is opened inside the reinforcing sleeve plate, and the reinforcing sleeve plate wraps the outer wall of the bellows.

[0011] As a preferred technical solution of the present application, a second sealing gasket is fixedly connected to the inner wall of the bottom of the sealing sleeve plate, and the second sealing gasket wraps the outer wall of the cover plate. A third sealing gasket is fixedly connected to the inside of the top of the sealing sleeve plate, and the third sealing gasket wraps the outer wall of the moving conducting rod.

[0012] As a preferred technical solution of the present application, connecting ears are fixedly installed on the front and rear sides of the sealing sleeve plate, fastening bolts penetrate through the connecting ears, and a plurality of threaded holes are opened at the top of the sealing sleeve plate. By manually passing each fastening bolt through the corresponding two connecting ears, the two sealing sleeve plates are spliced and fixedly installed on the cover and the moving conducting rod, increasing the connection strength between the cover plate and the moving conducting rod.

[0013] As a preferred technical solution of the present application, a first sealing gasket penetrates and connects to the inside of the top of the reinforcing sleeve plate, an installation ring plate is fixedly installed at the bottom of the reinforcing sleeve plate, a plurality of positioning bolts penetrate through the installation ring plate, and the ends of the positioning bolts are inserted into the threaded holes. By manually passing each positioning bolt through the installation ring plate and inserting it into the corresponding threaded hole, the reinforcing sleeve plate is fixedly installed on the bellows and the sealing sleeve plate, increasing the sealing effect.

[0014] As a preferred technical solution of the present application, the reinforcing sleeve plate and the installation ring plate are connected and communicated, and the reinforcing sleeve plate and the cavity are integrally arranged. The reinforcing sleeve plate and the installation ring plate are detachably connected to the sealing sleeve plate. By manually sleeving the two reinforcing sleeve plates on the bellows, the clamping ring plate connected to the sealing sleeve plate fits on the cavity inside the reinforcing sleeve plate.

[0015] As a preferred technical solution of the present application, the sealing sleeve plate is detachably connected to the cover plate and the moving conductive rod. The sealing sleeve plate is provided with a convex structure, and two sealing sleeve plates are spliced and fixedly installed on the cover plate and the moving conductive rod, increasing the connection strength between the cover plate and the moving conductive rod, and improving the stability and durability of the vacuum circuit breaker.

[0016] As a preferred technical solution of the present application, both the second sealing gasket and the third sealing gasket are made of rubber, and the second sealing gasket and the third sealing gasket are closely attached to the sealing sleeve plate. The second sealing gasket and the third sealing gasket connected by the sealing sleeve plate are attached to the outer walls of the cover plate and the moving conductive rod, effectively isolating the contact between the external environment and the internal structure.

[0017] Compared with the prior art, the beneficial effects of the present utility model are:

[0018] For this direct-acting sealing device of the vacuum circuit breaker, by providing a sealing sleeve plate, a second sealing gasket and a second sealing gasket, the sealing device can be installed, effectively isolating the contact between the external environment and the internal structure, ensuring the sealing performance of the vacuum circuit breaker. And a first sealing gasket and a reinforcing sleeve plate are provided to increase the sealing effect of the sealing device. And positioning bolts and fastening bolts are provided to disassemble the direct-acting sealing device installed on the vacuum circuit breaker. The specific content is as follows:

[0019] 1. The second sealing gasket and the second sealing gasket are provided. By attaching the second sealing gasket and the third sealing gasket to the outer walls of the cover plate and the moving conductive rod, the contact between the external environment and the internal structure is effectively isolated, preventing the penetration of media such as gas, liquid or dust, and ensuring the sealing performance of the vacuum circuit breaker and the purity of the working environment;

[0020] Furthermore, a sealing sleeve plate is provided. By passing each fastening bolt through the corresponding two connecting ears, two sealing sleeve plates are spliced and fixedly installed on the cover plate and the moving conductive rod, increasing the connection strength between the cover plate and the moving conductive rod, and improving the stability and durability of the vacuum circuit breaker;

[0021] Even further, a first sealing gasket and a reinforcing sleeve plate are provided. By attaching the first sealing gasket to the outer wall of the bellows and fixing the reinforcing sleeve plate on the bellows and the sealing sleeve plate with each positioning bolt, the sealing effect is increased, and the direct-acting sealing device is fixedly installed on the vacuum circuit breaker to achieve the effect of multiple seals;

[0022] 2. Positioning bolts and fastening bolts are provided. Through the positioning bolts and the fastening bolts, the two reinforcing sleeve plates and the sealing sleeve plate can be removed, so as to facilitate the disassembly of the direct-acting sealing device installed on the vacuum circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the main structure of the present utility model;

[0024] Figure 2 This is a schematic cross-sectional structure diagram of the reinforcement sleeve plate and the sealing sleeve plate of the present utility model;

[0025] Figure 3 This is a schematic partial cross-sectional structure diagram of the reinforcement sleeve plate of the present utility model;

[0026] Figure 4 This is a schematic partial cross-sectional structure diagram of the sealing sleeve plate, the cover plate and the moving conducting rod of the present utility model;

[0027] Figure 5 This is a schematic partial cross-sectional structure diagram of the sealing sleeve plate of the present utility model;

[0028] Figure 6 For the present utility model Figure 1 Schematic enlarged structure diagram at position A in.

[0029] In the figure: 1, frame body; 2, support frame; 3, insulating part; 4, vacuum interrupter; 5, high-voltage input terminal; 6, cover plate; 7, moving conducting rod; 8, bellows; 9, reinforcement sleeve plate; 10, cavity; 11, mounting ring plate; 12, positioning bolt; 13, first sealing gasket; 14, sealing sleeve plate; 15, snap ring plate; 16, threaded hole; 17, connecting ear; 18, fastening bolt; 19, second sealing gasket; 20, third sealing gasket. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] Please refer to Figures 1 - 6 , the present utility model provides the following technical solutions:

[0032] Embodiment 1: To solve the problem that in the use of the direct-acting sealing device of a vacuum circuit breaker in the market, due to the strip-shaped sealing gasket of the sealing device, it may be gradually aged and worn under the influence of factors such as temperature, pressure, and medium during long-term use, which will lead to a decline in sealing performance, and if the pressure of the pressing plate is set improperly or loosens during use, it may cause uneven stress on the sealing gasket, thus affecting the sealing performance. Reference can be made to the attached Figure 1 - attached Figure 6, including a frame body 1, a support frame 2 is fixedly installed at the top of the frame body 1, insulating members 3 are evenly arranged in the middle of the support frame 2 at the top of the frame body 1, and the ends of the insulating members 3 penetrate through the frame body 1. A cover plate 6 is fixedly installed at the top of the insulating member 3, a moving conductive rod 7 is fixedly connected to the top of the cover plate 6, a bellows 8 is fixedly connected to the top of the moving conductive rod 7, a vacuum interrupter 4 is arranged at the top of the bellows 8, and a high-voltage input terminal 5 is arranged at the top of the vacuum interrupter 4; also included are: two sealing sleeve plates 14 are sleeved on the outer wall of the cover plate 6, a clamping ring plate 15 is fixedly installed at the top of the sealing sleeve plate 14, and the clamping ring plate 15 wraps the outer wall of the bellows 8; two reinforcing sleeve plates 9 are sleeved on the outer wall of the sealing sleeve plate 14, a cavity 10 is formed inside the reinforcing sleeve plate 9, and the reinforcing sleeve plate 9 wraps the outer wall of the bellows 8. A second sealing gasket 19 is fixedly connected to the inner wall of the bottom of the sealing sleeve plate 14, and the second sealing gasket 19 wraps the outer wall of the cover plate 6. A third sealing gasket 20 is fixedly connected to the inside of the top of the sealing sleeve plate 14, and the third sealing gasket 20 wraps the outer wall of the moving conductive rod 7. A first sealing gasket 13 is connected through the inside of the top of the reinforcing sleeve plate 9. Both the second sealing gasket 19 and the third sealing gasket 20 are made of rubber, and the second sealing gasket 19 and the third sealing gasket 20 are closely attached to the sealing sleeve plate 14.

[0033] By manually installing the two sealing sleeve plates 14 on the cover plate 6 and the moving conductive rod 7, the second sealing gasket 19 and the third sealing gasket 20 connected to the sealing sleeve plate 14 are attached to the outer walls of the cover plate 6 and the moving conductive rod 7, effectively isolating the contact between the external environment and the internal structure, preventing the penetration of media such as gas, liquid or dust, ensuring the sealing performance of the vacuum circuit breaker and the purity of the working environment. Then, manually pass each fastening bolt 18 through the corresponding two connecting ears 17, so that the two sealing sleeve plates 14 are spliced and fixedly installed on the cover plate 6 and the moving conductive rod 7, increasing the connection strength between the cover plate 6 and the moving conductive rod 7, improving the stability and durability of the vacuum circuit breaker. Then, manually put the two reinforcing sleeve plates 9 on the bellows 8, so that the clamping ring plate 15 connected to the sealing sleeve plate 14 fits on the cavity 10 inside the reinforcing sleeve plate 9, and thus the first sealing gasket 13 connected to the reinforcing sleeve plate 9 fits on the outer wall of the bellows 8. Finally, manually pass each positioning bolt 12 through the mounting ring plate 11 and insert it into the corresponding threaded hole 16, so that the reinforcing sleeve plate 9 is fixedly installed on the bellows 8 and the sealing sleeve plate 14, increasing the sealing effect, realizing the fixed installation of the direct-acting sealing device on the vacuum circuit breaker, and achieving the effect of multiple seals.

[0034] Embodiment 2: The direct-acting sealing device installed on the vacuum circuit breaker can be disassembled, and reference can be made to the attached Figure 1 - attached Figure 6, connection ears 17 are fixedly installed on the front and rear sides of the sealing sleeve plate 14. A fastening bolt 18 penetrates through the interior of the connection ear 17. A number of threaded holes 16 are provided in the top of the sealing sleeve plate 14. An installation ring plate 11 is fixedly installed at the bottom of the reinforcing sleeve plate 9. A number of positioning bolts 12 penetrate through the interior of the installation ring plate 11, and the end of the positioning bolt 12 is inserted into the threaded hole 16. The reinforcing sleeve plate 9 and the installation ring plate 11 are in communication with each other, and the reinforcing sleeve plate 9 and the cavity 10 are integrally provided. The reinforcing sleeve plate 9, the installation ring plate 11 and the sealing sleeve plate 14 are detachably connected. The sealing sleeve plate 14 and the cover plate 6 and the moving conductive rod 7 are detachably connected. The sealing sleeve plate 14 is provided with a convex structure.

[0035] By the staff manually pulling out each positioning bolt 12 from the corresponding threaded hole 16 first, so that each positioning bolt 12 is separated from the reinforcing sleeve plate 9, thus the two reinforcing sleeve plates 9 can be removed and separated from the corrugated pipe 8 and the sealing sleeve plate 14. Then manually pulling out each fastening bolt 18 from the connection ear 17, the two sealing sleeve plates 14 can be removed and separated from the cover plate 6 and the moving conductive rod 7, so as to facilitate the disassembly of the direct-acting sealing device installed on the vacuum circuit breaker.

[0036] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Direct-acting sealing device for vacuum circuit breaker, including a frame body (1), a support frame (2) is fixedly installed at the top of the frame body (1), insulating parts (3) are evenly arranged in the middle of the support frame (2) at the top of the frame body (1), and the ends of the insulating parts (3) penetrate through the frame body (1). A cover plate (6) is fixedly installed at the top of the insulating part (3), a moving conducting rod (7) is fixedly connected to the top of the cover plate (6), a bellows (8) is fixedly connected to the top of the moving conducting rod (7), a vacuum interrupter (4) is arranged at the top of the bellows (8), and a high-voltage input terminal (5) is arranged at the top of the vacuum interrupter (4). It is characterized in that, It further includes: Two sealing sleeve plates (14) are sleeved on the outer wall of the cover plate (6), a clamping ring plate (15) is fixedly installed at the top of the sealing sleeve plate (14), and the clamping ring plate (15) wraps the outer wall of the bellows (8). Two reinforcing sleeve plates (9) are sleeved on the outer wall of the sealing sleeve plate (14), a cavity (10) is opened inside the reinforcing sleeve plate (9), and the reinforcing sleeve plate (9) wraps the outer wall of the bellows (8).

2. The direct-acting sealing device of the vacuum circuit breaker according to claim 1, wherein: A second sealing gasket (19) is fixedly connected to the inner wall of the bottom of the sealing sleeve plate (14), and the second sealing gasket (19) wraps the outer wall of the cover plate (6). A third sealing gasket (20) is fixedly connected to the inside of the top of the sealing sleeve plate (14), and the third sealing gasket (20) wraps the outer wall of the moving conducting rod (7).

3. The direct-acting sealing device of a vacuum circuit breaker according to claim 2, characterized in that: Connecting ears (17) are fixedly installed on the front and back sides of the sealing sleeve plate (14), a fastening bolt (18) penetrates through the connecting ear (17), and a plurality of threaded holes (16) are opened at the top of the sealing sleeve plate (14).

4. The direct-acting sealing device of the vacuum circuit breaker according to claim 1, characterized in that: A first sealing gasket (13) penetrates and is connected to the inside of the top of the reinforcing sleeve plate (9), a mounting ring plate (11) is fixedly installed at the bottom of the reinforcing sleeve plate (9), a plurality of positioning bolts (12) penetrate through the mounting ring plate (11), and the ends of the positioning bolts (12) are inserted into the threaded holes (16).

5. The direct-acting sealing device of the vacuum circuit breaker according to claim 4, characterized in that: The reinforcing sleeve plate (9) and the mounting ring plate (11) are communicated with each other, the reinforcing sleeve plate (9) and the cavity (10) are integrally arranged, and the reinforcing sleeve plate (9) and the mounting ring plate (11) are detachably connected to the sealing sleeve plate (14).

6. The direct-acting sealing device of a vacuum circuit breaker according to claim 2, characterized in that: The sealing sleeve plate (14) is detachably connected to the cover plate (6) and the moving conducting rod (7), and the sealing sleeve plate (14) is arranged in a convex structure.

7. The direct-acting sealing device of the vacuum circuit breaker according to claim 2, characterized in that: Both the second sealing gasket (19) and the third sealing gasket (20) are made of rubber, and the second sealing gasket (19) and the third sealing gasket (20) are closely attached to the sealing sleeve plate (14).

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