CN212461510U

CN212461510U - Vacuum arc-extinguishing chamber of vacuum circuit breaker with good air tightness

Info

Publication number: CN212461510U
Application number: CN202020889616.XU
Authority: CN
Inventors: 陈龙
Original assignee: Guizhou Tongren Xingtong Electric Power Complete Equipment Technology Co ltd
Current assignee: Guizhou Tongren Xingtong Electric Power Complete Equipment Technology Co ltd
Priority date: 2020-05-24
Filing date: 2020-05-24
Publication date: 2021-02-02
Anticipated expiration: 2030-05-24

Abstract

The utility model discloses a vacuum interrupter of vacuum circuit breaker with good air tightness, which comprises a protective sleeve and a vacuum interrupter, wherein a first protective cylinder, a second protective cylinder and a sleeve base of the protective sleeve are all designed into a double-layer structure of a metal shell and an insulating rubber layer, a transparent glass tube is utilized to connect the first protective cylinder and the second protective cylinder, and a cushion ring is arranged in the first protective cylinder and the sleeve base, so as to fully resist and absorb the impact of the outside on the vacuum interrupter, avoid the ceramic and glass shells of the vacuum interrupter from being broken and broken due to the impact, a clamping block is arranged on the inner wall of a port of a fixed sleeve A which is sleeved with a conductive rod, a clamping ring is sleeved on the outer wall of the conductive rod between the clamping blocks, the clamping ring drives the conductive rod to move in the range between the clamping blocks to complete the closing and the breaking of a circuit, avoid the direct impact of a moving contact ring, and, and the clamping ring is in interference fit with the inner wall of the fixing sleeve A, so that the sealing performance of the vacuum arc extinguish chamber is further ensured.

Description

Vacuum arc-extinguishing chamber of vacuum circuit breaker with good air tightness

Technical Field

The utility model relates to an electrical equipment technical field specifically is a vacuum circuit breaker vacuum interrupter that gas tightness is good.

Background

The vacuum arc-extinguishing chamber is also called a vacuum switch tube and is a core component of a medium-high voltage power switch. The vacuum arc extinguish chamber has the main functions of rapidly extinguishing arc and inhibiting current after a medium-high voltage circuit is cut off a power supply through excellent insulating property of vacuum in the pipe, avoids accidents and accidents, is mainly applied to a power transmission and distribution control system of electric power, and is also applied to power distribution systems of metallurgy, mines, petroleum, chemical industry, railways, broadcasting, communication, industrial high-frequency heating and the like.

The existing vacuum arc-extinguishing chamber generally adopts ceramic and glass shells, so that the ceramic and glass shells are brittle, and once the vacuum arc-extinguishing chamber is impacted from the outside, the ceramic and glass shells are easy to crack, so that the action of the vacuum arc-extinguishing chamber is ineffective, and a circuit can not be protected; after the conducting rod of the vacuum arc-extinguishing chamber completes circuit opening and disconnection for a long time, the sealing washer on the inner wall of the end cover is easily deformed and damaged by the impact of the moving contact, so that the sealing performance of the vacuum arc-extinguishing chamber is caused to be problematic, and the current leakage is caused to cause production accidents. Therefore, the vacuum arc extinguish chamber of the vacuum circuit breaker with good air tightness is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vacuum circuit breaker vacuum interrupter that gas tightness is good, through installing vacuum interrupter inside the protective sheath that is provided with insulating rubber layer on the inner wall to set up the fixture block on the port inner wall of the fixed sleeve A who cup joints the conducting rod, and cup jointed the snap ring on the conducting rod's between the snap ring on the outer wall of the conducting rod between the clamp block, thereby solved the problem that proposes in the above-mentioned background.

In order to achieve the above object, the utility model provides a following technical scheme: a vacuum arc extinguish chamber of a vacuum circuit breaker with good air tightness comprises a protective sleeve and the vacuum arc extinguish chamber, wherein the vacuum arc extinguish chamber is installed inside the protective sleeve, the protective sleeve comprises a first protective cylinder, a transparent glass tube, a second protective cylinder, a sleeve base, connecting threads and an installation hole, the bottom of the first protective cylinder is embedded and connected with the transparent glass tube, the bottom end of the transparent glass tube is embedded and connected with the upper end of the second protective cylinder, the sleeve base is sleeved and connected with the bottom end of the second protective cylinder through the connecting threads on the side wall of the sleeve base, the installation hole is respectively formed in the middle of the top end of the first protective cylinder and the middle of the bottom end of the sleeve base, and the vacuum arc;

the vacuum arc extinguish chamber comprises a shell, end covers, a vacuum arc extinguish chamber body, a fixed sleeve A, a fixed sleeve B, a conductive rod, a movable contact, a static conductive rod and a static contact, wherein the end covers are fixedly connected to the outer walls of the upper end and the lower end of the shell respectively, the vacuum arc extinguish chamber body is formed between the shell and the end covers, the fixed sleeve A and the fixed sleeve B are fixedly connected to the outer walls of the end covers at the upper end and the lower end of the vacuum arc extinguish chamber body respectively, the conductive rod is sleeved in the fixed sleeve A, one end of the conductive rod extends to the inside of the vacuum arc extinguish chamber body, the movable contact is arranged at the bottom of the tail end of the conductive rod, the static conductive rod is sleeved in the fixed sleeve B, one end of.

Further, the first protection cylinder comprises a metal shell and an insulating rubber layer, and the insulating rubber layer is arranged on the inner wall of the metal shell.

Furthermore, the second protection cylinder and the sleeve base are the same as the first protection cylinder in structure.

Furthermore, a buffer backing ring is arranged in each of the first protection cylinder and the sleeve base.

Further, the shell is a component made of transparent plastic materials.

Furthermore, sealing gaskets are arranged on the inner walls of the ports, connected with the fixed sleeve A and the fixed sleeve B, of the end covers.

Furthermore, the inner walls of the ports at the upper end and the lower end of the fixed sleeve A are respectively and fixedly connected with clamping blocks, the outer wall of the conductive moving rod between the clamping blocks is sleeved with a clamping ring, and the clamping ring is in interference fit with the inner wall of the fixed sleeve A.

Furthermore, the outer walls of two sides of the static conducting rod at the lower end of the static contact are respectively provided with a fixed rod, one end of each fixed rod, far away from the static conducting rod, is fixedly connected with the inner wall of the shell, and two sides of the top end of the static contact are respectively and fixedly connected with a buffering conducting reed.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model provides a vacuum circuit breaker vacuum interrupter that gas tightness is good, all design the first protection section of thick bamboo of protective sheath, a second protection section of thick bamboo and sleeve base into the bilayer structure on metal casing and insulating rubber layer, and utilize the first protection section of thick bamboo of transparent glass union coupling and a second protection section of thick bamboo, and set up the cushion ring in first protection section of thick bamboo and sleeve base, fully resist and absorb external impact to vacuum interrupter, heavily protect vacuum interrupter in the inside of protective sheath, avoid vacuum interrupter's pottery and glass shell breakage to receive the impact and broken.

2. The utility model provides a vacuum circuit breaker vacuum interrupter that gas tightness is good sets up the fixture block on the port inner wall of the fixed sleeve A who cup joints the conducting rod to and cup jointed the snap ring on the conducting rod's between the fixture block outer wall, the snap ring drives the conducting rod and accomplishes the closure and the disconnection task of circuit in the within range internalization between the fixture block, avoid seal ring to receive the direct impact of moving contact, guarantee vacuum interrupter's leakproofness good, and interference fit between snap ring and fixed sleeve A's inner wall, the leakproofness problem has further been prevented to vacuum interrupter from appearing.

3. The utility model provides a vacuum circuit breaker vacuum interrupter that gas tightness is good is provided with the dead lever on the static conducting rod both sides outer wall of static contact lower extreme respectively, and the dead lever one end of keeping away from static conducting rod all links to each other with the inner wall of casing is fixed, and the top both sides of static contact fixedly connected with cushions electrically conductive reed respectively, utilizes dead lever and cushion electrically conductive reed to cushion the impact of electrically conductive pole to static conducting rod, avoids the seal ring of static conducting rod end not hard up, guarantees vacuum interrupter's leakproofness.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the protective sheath of the present invention;

fig. 3 is a sectional view of a first protection cylinder of the present invention;

fig. 4 is a schematic structural view of the vacuum arc-extinguishing chamber of the present invention;

fig. 5 is a sectional view of the fixing sleeve a of the present invention.

In the figure: 1. a protective sleeve; 11. a first protective cylinder; 1101. a metal housing; 1102. an insulating rubber layer; 12. a transparent glass tube; 13. a second protective barrel; 14. a sleeve base; 15. connecting threads; 16. mounting holes; 17. a cushion ring; 2. a vacuum arc-extinguishing chamber; 21. a housing; 22. an end cap; 23. a vacuum arc-extinguishing chamber body; 24. fixing the sleeve A; 25. a fixed sleeve B; 26. a conductive moving rod; 27. a moving contact; 28. A static conductive rod; 29. static contact; 210. a sealing gasket; 211. a clamping block; 212. a snap ring; 213. fixing the rod; 214. the conductive reed is buffered.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a vacuum interrupter with good airtightness comprises a protection sleeve 1 and a vacuum interrupter 2, wherein the vacuum interrupter 2 is installed inside the protection sleeve 1, the protection sleeve 1 comprises a first protection tube 11, a transparent glass tube 12, a second protection tube 13, a sleeve base 14, a connecting thread 15 and a mounting hole 16, the transparent glass tube 12 is embedded and connected at the bottom of the first protection tube 11, the bottom end of the transparent glass tube 12 is embedded at the upper end of the second protection tube 13, the sleeve base 14 is sleeved at the bottom end of the second protection tube 13 through the connecting thread 15 on the side wall of the sleeve base, the mounting hole 16 is respectively arranged at the middle part of the top end of the first protection tube 11 and the middle part of the bottom end of the sleeve base 14, both the first protection tube 11 and the sleeve base 14 are provided with a buffer cushion ring 17, and the vacuum interrupter 2 is installed inside the sleeve base 14.

The first protection cylinder 11 comprises a metal shell 1101 and an insulating rubber layer 1102, the insulating rubber layer 1102 is arranged on the inner wall of the metal shell 1101, and the second protection cylinder 13 and the sleeve base 14 are the same as the first protection cylinder 11 in composition structure.

Referring to fig. 4-5, a vacuum interrupter of a vacuum circuit breaker with good airtightness is disclosed, wherein the vacuum interrupter 2 includes a housing 21, an end cap 22, a vacuum interrupter body 23, a fixed sleeve a24, a fixed sleeve B25, a conducting rod 26, a moving contact 27, a static conducting rod 28 and a static contact 29, the housing 21 is a member made of transparent material, the outer walls of the upper and lower ends of the housing 21 are respectively and fixedly connected to the end caps 22, the vacuum interrupter body 23 is formed between the housing 21 and the end caps 22, the fixed sleeve a24 and the fixed sleeve B25 are respectively and fixedly connected to the outer walls of the end caps 22 at the upper and lower ends of the vacuum interrupter body 23, the conducting rod 26 is sleeved in the fixed sleeve a24, one end of the conducting rod 26 extends to the inside of the vacuum interrupter body 23, the moving contact 27 is disposed at the bottom of the end, the static rod 28 is sleeved in the fixed sleeve B25, and one end of the static, the top of the end is provided with a static contact 29.

Sealing gaskets 210 are arranged on the inner walls of the ports where the end cover 22 is connected with the fixed sleeve A24 and the fixed sleeve B25, fixture blocks 211 are fixedly connected to the inner walls of the ports at the upper end and the lower end of the fixed sleeve A24 respectively, a clamp ring 212 is sleeved on the outer wall of the conductive rod 26 between the fixture blocks 211, the clamp ring 212 is in interference fit with the inner wall of the fixed sleeve A24, fixing rods 213 are arranged on the outer walls of two sides of the static conductive rod 28 at the lower end of the static contact 29 respectively, one end of each fixing rod 213, which is far away from the static conductive rod 28, is fixedly connected with the inner wall of the shell 21, and buffering conductive reeds.

In summary, the following steps: the utility model provides a vacuum circuit breaker vacuum interrupter that gas tightness is good designs first protection barrel 11, second protection barrel 13 and sleeve base 14 of protective sheath 1 as the bilayer structure of metal casing 1101 and insulating rubber layer 1102, and utilizes transparent glass tube 12 to connect first protection barrel 11 and second protection barrel 13, and set up cushion ring 17 in first protection barrel 11 and sleeve base 14, fully resists the impact of absorbing the external world to vacuum interrupter 2, heavily protects vacuum interrupter 2 in the inside of protective sheath 1, avoids the ceramic and the glass casing of vacuum interrupter 2 to break by the impact and break; the inner wall of the port of the fixed sleeve A24 sleeved with the conductive moving rod 26 is provided with the clamping blocks 211, the outer wall of the conductive moving rod 26 between the clamping blocks 211 is sleeved with the clamping ring 212, the clamping ring 212 drives the conductive moving rod 26 to move in the range between the clamping blocks 211 to complete the closing and opening tasks of a circuit, the sealing washer 210 is prevented from being directly impacted by the movable contact 27, the good sealing performance of the vacuum arc-extinguishing chamber 2 is ensured, and the clamping ring 212 is in interference fit with the inner wall of the fixed sleeve A24, so that the problem of the sealing performance of the vacuum arc-extinguishing chamber 2 is further prevented; the outer walls of two sides of the static conductive rod 28 at the lower end of the static contact 29 are respectively provided with a fixing rod 213, one end of the fixing rod 213 far away from the static conductive rod 28 is fixedly connected with the inner wall of the shell 21, two sides of the top end of the static contact 29 are respectively and fixedly connected with a buffering conductive reed 214, and the fixing rod 213 and the buffering conductive reed 214 are utilized to buffer the impact of the conductive rod 26 on the static conductive rod 28, so that the looseness of a sealing gasket 210 at the end of the static conductive rod 28 is avoided, and the sealing performance of the vacuum arc extinguish. The vacuum arc extinguish chamber of the vacuum circuit breaker with good air tightness has the advantages of simple structure, good protection and good tightness.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a vacuum circuit breaker vacuum interrupter that gas tightness is good, includes protective sheath (1) and vacuum interrupter (2), and the inside at protective sheath (1), its characterized in that are installed in vacuum interrupter (2): the protective sleeve (1) comprises a first protective sleeve (11), a transparent glass tube (12), a second protective sleeve (13), a sleeve base (14), a connecting thread (15) and a mounting hole (16), the bottom of the first protective sleeve (11) is embedded and connected with the transparent glass tube (12), the bottom end of the transparent glass tube (12) is embedded at the upper end of the second protective sleeve (13), the sleeve base (14) is sleeved at the bottom end of the second protective sleeve (13) through the connecting thread (15) on the side wall of the sleeve base, the mounting hole (16) is respectively formed in the middle of the top end of the first protective sleeve (11) and the middle of the bottom end of the sleeve base (14), and a vacuum arc-extinguishing chamber (2) is mounted in the sleeve base (14);

the vacuum arc-extinguishing chamber (2) comprises a shell (21), an end cover (22), a vacuum arc-extinguishing chamber body (23), a fixed sleeve A (24), a fixed sleeve B (25), a conductive rod (26), a movable contact (27), a static conductive rod (28) and a static contact (29), wherein the outer walls of the upper end and the lower end of the shell (21) are respectively fixedly connected with the end cover (22), the vacuum arc-extinguishing chamber body (23) is formed between the shell (21) and the end cover (22), the fixed sleeve A (24) and the fixed sleeve B (25) are respectively fixedly connected to the outer walls of the end covers (22) at the upper end and the lower end of the vacuum arc-extinguishing chamber body (23), the conductive rod (26) is sleeved in the fixed sleeve A (24), one end of the conductive rod (26) extends to the inside of the vacuum arc-extinguishing chamber body (23), the movable contact (27) is arranged at the bottom of the tail, one end of the static conductive rod (28) extends to the inside of the vacuum arc extinguish chamber body (23), and the top of the tail end is provided with a static contact (29).

2. Vacuum interrupter of a vacuum circuit breaker with good gas tightness according to claim 1, characterized in that: the first protection cylinder (11) comprises a metal shell (1101) and an insulating rubber layer (1102), wherein the insulating rubber layer (1102) is arranged on the inner wall of the metal shell (1101).

3. Vacuum interrupter of a vacuum circuit breaker with good gas tightness according to claim 1, characterized in that: the second protective barrel (13) and the sleeve base (14) are the same as the first protective barrel (11) in composition structure.

4. Vacuum interrupter of a vacuum circuit breaker with good gas tightness according to claim 1, characterized in that: and buffer cushion rings (17) are arranged in the first protective cylinder (11) and the sleeve base (14).

5. Vacuum interrupter of a vacuum circuit breaker with good gas tightness according to claim 1, characterized in that: the shell (21) is a component made of transparent plastic materials.

6. Vacuum interrupter of a vacuum circuit breaker with good gas tightness according to claim 1, characterized in that: and sealing gaskets (210) are arranged on the inner walls of the ports where the end cover (22) is connected with the fixed sleeve A (24) and the fixed sleeve B (25).

7. Vacuum interrupter of a vacuum circuit breaker with good gas tightness according to claim 1, characterized in that: the clamping blocks (211) are fixedly connected to the inner walls of the ports at the upper end and the lower end of the fixed sleeve A (24) respectively, the clamping ring (212) is sleeved on the outer wall of the electric conduction rod (26) between the clamping blocks (211), and the clamping ring (212) is in interference fit with the inner wall of the fixed sleeve A (24).

8. Vacuum interrupter of a vacuum circuit breaker with good gas tightness according to claim 1, characterized in that: and fixing rods (213) are respectively arranged on the outer walls of two sides of a static conducting rod (28) at the lower end of the static contact (29), one end of each fixing rod (213) far away from the static conducting rod (28) is fixedly connected with the inner wall of the shell (21), and two sides of the top end of the static contact (29) are respectively and fixedly connected with a buffering conducting reed (214).