CN117476392A - Vacuum arc-extinguishing chamber device and vacuum circuit breaker - Google Patents

Abstract

The invention belongs to the field of high-voltage or high-current switches with arc extinguishing or arc preventing devices, and particularly relates to a vacuum arc extinguishing chamber device and a vacuum circuit breaker. In order to solve the technical problem that in the prior art, as the movable contacts of two vacuum arc-extinguishing chambers are fixedly connected through the same group of hard combined supports, one vacuum arc-extinguishing chamber cannot be tightly closed, the invention provides a vacuum arc-extinguishing chamber device which comprises at least two vacuum arc-extinguishing chambers and a compression elastic piece which is directly or indirectly in pressing fit with the movable contacts of each vacuum arc-extinguishing chamber, wherein the compression elastic piece is provided with a first compression state for opening all the vacuum arc-extinguishing chambers and a second compression state for closing all the vacuum arc-extinguishing chambers; the vacuum interrupter device further comprises a transmission structure for changing the compression state of the compression elastic member according to the position of the insulation pull rod. The invention also provides a vacuum circuit breaker using the vacuum interrupter device. And tight closing of all vacuum arc-extinguishing chambers is realized simultaneously through elastic connection.

Description

A vacuum arc extinguishing chamber device and vacuum circuit breaker

Technical field

The invention belongs to the field of high-voltage or high-current switches with arc extinguishing or arc prevention devices, and in particular, relates to a vacuum arc extinguishing chamber device and a vacuum circuit breaker.

Background technique

Vacuum circuit breakers do not need to be filled with SF ₆ gas to achieve good insulation effects. Therefore, using it as a breaking unit and using environmentally friendly gas as external insulation is an effective way to achieve greenness and environmental protection in the field of high-voltage switches at this stage. However, due to the inherent "insulation saturation" effect of the vacuum medium, the effect of increasing the spacing between the moving and static contacts on improving the insulation performance of the vacuum circuit breaker gradually weakens as the spacing gradually increases, thus limiting the vacuum extinguishing capacity. Arc chambers and vacuum circuit breakers are developing towards higher voltage levels.

The utility model patent with the authorization announcement number of CN 214542008 U and the authorization announcement date of 2021.10.29 discloses a double-break vacuum circuit breaker pole, which includes a shell, an insulating tie rod arranged in the shell, and an insulating rod arranged in the shell from top to bottom. The first vacuum arc extinguishing chamber, the first soft connection, the second vacuum arc extinguishing chamber and the second soft connection in the casing, the static contact of the first vacuum arc extinguishing chamber is connected to the upper conductive end (i.e., the static end outlet structure), The movable contact of the first vacuum arc extinguishing chamber and the static contact of the second vacuum arc extinguishing chamber are connected in series through the first soft connection, the movable contact of the second vacuum arc extinguishing chamber is connected in series with the second soft connection, and the second soft connection Connected in series with the lower conductive end (i.e., the moving end outlet structure), the movable contact of the first vacuum arc extinguishing chamber and the movable contact of the second vacuum arc extinguishing chamber are fixedly connected through the combined bracket (i.e., the transmission structure), and the insulating pull rod can simultaneously The movable contact of the first vacuum arc extinguishing chamber and the movable contact of the second vacuum arc extinguishing chamber are driven to move to achieve the same state of the first vacuum arc extinguishing chamber and the second vacuum arc extinguishing chamber. Among them, the shell includes an upper shell, a middle shell and a lower shell. The upper shell and the lower shell surround the arc extinguishing chamber to form an arc extinguishing chamber shell (ie, arc extinguishing chamber casing); the combined bracket is composed of the first It consists of an upper mounting plate fixedly connected to the vacuum arc extinguishing chamber, a lower mounting plate fixedly connected to the second vacuum arc extinguishing chamber, and bolts fixedly connecting the upper and lower mounting plates. When assembling the combined bracket, the upper and lower installations are controlled by bolts. The distance between the plates.

However, during the installation process of the poles of the above-mentioned double-break vacuum circuit breaker, since the movable contacts of the two vacuum arc extinguishing chambers are fixedly connected through the same set of hard combination brackets (i.e. elastic components), the installation plate must be aligned with the upper mounting plate during installation. There are strict requirements for the distance between the upper and lower mounting plates. Once there is an error in the distance between the upper and lower mounting plates, it will cause the movable contact of the other vacuum interrupter to be connected after the closing of one vacuum interrupter. There are still gaps between the static contacts, which causes hidden dangers in the vacuum circuit breaker.

Contents of the invention

The object of the present invention is to provide a vacuum interrupter device and a vacuum circuit breaker to solve the problem in the prior art that the movable contacts of two vacuum interrupters are fixedly connected through the same set of rigid combination brackets during installation. There are strict requirements on the distance between the upper and lower mounting plates. Once there is an error in the distance between the upper and lower mounting plates, it will cause that after one vacuum interrupter has been closed, the other vacuum interrupter will There is still a gap between the moving contacts and the stationary contacts, which leads to technical problems with hidden dangers in the vacuum circuit breaker.

In order to achieve the above objects, the technical solution of the vacuum arc extinguishing chamber device provided by the present invention is:

A vacuum arc extinguishing chamber device, including an arc extinguishing chamber casing and at least two vacuum arc extinguishing chambers arranged in the arc extinguishing chamber casing. Each vacuum arc extinguishing chamber includes a movable contact, and the movable contact is connected with a transmission device , the transmission device includes a compression elastic member that is directly or indirectly press-fitted with the movable contact. The compression elastic member has a first compression state for opening all vacuum arc extinguishing chambers and a second compression state for closing all vacuum arc extinguishing chambers. In the compressed state, the compression degree of the compression elastic member in the first compression state is smaller than the compression degree of the compression elastic member in the second compression state.

The beneficial effects are: the present invention is an improved invention. By arranging a transmission device including a compression elastic piece (for example, a compression elastic piece clamped on a combined bracket in the background art), the compression state of the compression elastic piece can be changed when the insulating pull rod moves, thereby changing the force exerted by the compression elastic piece on the corresponding movable contact. The pressure causes the transmission device containing the compressed elastic member to push the movable contact to move, thereby realizing the closing and opening of the vacuum arc extinguishing chamber device. Due to the existence of the compression elastic piece, after the movable contact of a vacuum arc extinguishing chamber comes into contact with the static contact, the insulating rod can still drive other movable contacts to move. At this time, the compression elastic piece continues to compress until the other vacuum The movable contacts of the arc extinguishing chamber are in contact with the static contacts, completing the tight closing of all vacuum arc extinguishing chambers in the vacuum arc extinguishing chamber device, and avoiding the gap between the movable contacts and the static contacts of any vacuum arc extinguishing chamber. situation and eliminate hidden dangers. Of course, when at least two vacuum interrupters are connected in parallel, the technical effect of compressing elastic members can also be achieved so that after one vacuum interrupter is closed, the movable contacts of the other vacuum interrupters can still be moved by the insulating rods. .

Furthermore, each vacuum arc extinguishing chamber also includes a shell and a static contact. The vacuum arc extinguishing chamber device also includes a static end cover plate and a moving end cover plate. The vacuum arc extinguishing chamber is divided into static ends closest to the static end cover plate. The end arc extinguishing chamber and the transmission arc extinguishing chamber except the static end arc extinguishing chamber. The static contacts of the transmission arc extinguishing chamber are movably assembled on the corresponding housing along the opening and closing direction. The static contacts of the transmission arc extinguishing chamber are An elastic component is arranged between the movable contact of the adjacent vacuum arc extinguishing chamber. The elastic component includes the compression elastic member. The transmission of any arc extinguishing chamber except the transmission arc extinguishing chamber closest to the movable end cover plate The devices are composed of static contacts, movable contacts and elastic components of each transmission arc-extinguishing chamber on the side of any arc-extinguishing chamber close to the moving end cover plate.

The beneficial effects are: on the basis that the static contacts of the transmission arc-extinguishing chamber can move, for any vacuum arc-extinguishing chamber except the transmission arc-extinguishing chamber closest to the moving end cover, the transmission structure has its moving contacts far away from each other. All movable contacts, static contacts and elastic components of the vacuum interrupter at one end of the static end cover can be omitted from the combined bracket, reducing the size of the vacuum interrupter device, which is conducive to the miniaturization of the vacuum interrupter device.

Further, the elastic component is a conductive elastic component used to realize the transmission and electrical connection of two adjacent vacuum arc extinguishing chambers.

The beneficial effect is: by setting the elastic component as a conductive elastic component, the conductive structure (such as a copper bar soft connection) between two adjacent contacts of two adjacent vacuum arc extinguishing chambers can be omitted, thereby simplifying vacuum arc extinguishing. The structure of the chamber device saves the space occupied by the copper bar, which is conducive to the miniaturization of the vacuum circuit breaker.

Furthermore, the compression elastic member is a compression spring, and the elastic component includes a guide sleeve that is sleeved on the compression spring and used to guide the compression spring, a compression rod and a connection that extend into the guide sleeve to compress the compression spring. A retaining ring on the inner wall of the guide sleeve that limits the compression spring and pressure rod to prevent the compression spring and pressure rod from coming out of the guide sleeve.

The beneficial effects are: the guide sleeve can be used to guide the compression spring conveniently, the pressure rod can be used to conveniently change the state of the compression spring, and the retaining ring can be used to place the compression spring and the pressure rod out of the guide sleeve, thereby conveniently using The compression spring controls the opening and closing status of the vacuum arc extinguishing chamber.

Furthermore, the outer circumferential surface of the blocking ring is provided with male threads, the inner wall of the guide sleeve is provided with female threads, and the blocking ring is threadedly connected to the guide sleeve.

The beneficial effect is that the baffle ring and the guide sleeve can be easily connected through the thread, and the relative position of the baffle ring and the guide sleeve can be adjusted through the thread, thereby adjusting the maximum length of the compression elastic member.

Furthermore, a wing plate is provided on the side wall of the pressure rod, and the wing plate includes a guide surface that guides and cooperates with the inner peripheral surface of the guide sleeve to realize the guidance of the pressure rod by the guide sleeve.

The beneficial effect is that the guide sleeve can be used to guide the pressure rod conveniently through the wing plate, so that the pressure rod can smoothly compress the compression spring.

Furthermore, the pressure rod and the guide sleeve are respectively connected to the movable contact and the stationary contact that are drivingly connected between two adjacent vacuum arc extinguishing chambers through a double-headed screw.

The beneficial effect is that the pressure rod and guide sleeve can be easily fixed on the moving contact or the static contact through the double-headed screw. At the same time, different pressure rods, guide sleeves and compression springs can be selected according to needs.

Furthermore, at least one of a set of movable contacts and stationary contacts connected by an elastic component is provided with a reset elastic member elastically connected to the corresponding vacuum arc extinguishing chamber shell, so as to prevent the vacuum arc extinguishing chamber from opening when the vacuum arc extinguishing chamber is opened. Provide opening power for the corresponding moving contacts.

The beneficial effect is that by arranging the reset elastic member, the vacuum arc extinguishing chamber device can be arranged horizontally, or the uppermost vacuum arc extinguishing chamber can be used to connect with the insulating tie rod. When closing, the reset elastic member deforms to accumulate energy; when opening, since the insulating rod can only drive the moving contact of one vacuum interrupter, other moving contacts require opening power. At this time, The reset elastic member recovers and releases energy, thereby causing each vacuum arc extinguishing chamber to open equally.

Furthermore, the reset elastic member is a compression elastic member, and the reset elastic member is arranged between the movable contact and the shell of the vacuum arc extinguishing chamber where the movable contact is located, so as to directly act as the movable contact when the vacuum arc extinguishing chamber is opened. Provide opening power; alternatively, the reset elastic member is a tensile elastic member, and the reset elastic member is connected between the static contact and the shell of the vacuum arc extinguishing chamber where the static contact is located to provide the opening force when the vacuum arc extinguishing chamber is opened. The static contacts provide power, thereby indirectly providing opening power for the same group of movable contacts.

The beneficial effect is that by arranging the reset elastic member between a contact and the shell of the vacuum interrupter corresponding to the contact, the reset elastic member and the elastic component do not overlap in the axial direction of the vacuum interrupter device (i.e. (dislocation arrangement), there is no need to consider the interference between the reset elastic part and the elastic component, and the structure is simple.

In order to achieve the above objects, the technical solution of the vacuum circuit breaker provided by the present invention is:

A vacuum circuit breaker includes a vacuum arc extinguishing chamber device and an operating mechanism. The vacuum arc extinguishing chamber device includes an arc extinguishing chamber casing and at least two vacuum arc extinguishing chambers arranged in the arc extinguishing chamber casing. Each vacuum arc extinguishing chamber Each chamber includes a movable contact, and the movable contact is connected with a transmission device. The transmission device includes a compression elastic piece that is directly or indirectly press-fitted with the movable contact. The compression elastic piece has a first mechanism for opening all vacuum arc extinguishing chambers. A compression state and a second compression state in which all vacuum arc extinguishing chambers are closed. The compression degree of the compression elastic member in the first compression state is smaller than the compression degree of the compression elastic member in the second compression state.

The beneficial effects are: the present invention is an improved invention. The opening and closing of the vacuum arc extinguishing chamber can be controlled through the operating mechanism; by arranging a transmission device including a compression elastic member (for example, the compression elastic member is clamped on the combined bracket in the background art), the compression of the compression elastic member can be changed when the insulating pull rod moves. state, thereby changing the pressure exerted by the compressed elastic member on the corresponding movable contact, so that the transmission device containing the compressed elastic member drives the movable contact to move, thereby realizing the closing and opening of the vacuum arc extinguishing chamber device. Due to the existence of the compression elastic piece, after the movable contact of a vacuum arc extinguishing chamber comes into contact with the static contact, the insulating rod can still drive other movable contacts to move. At this time, the compression elastic piece continues to compress until the other vacuum The movable contacts of the arc extinguishing chamber are in contact with the static contacts, completing the tight closing of all vacuum arc extinguishing chambers in the vacuum arc extinguishing chamber device, and avoiding the gap between the movable contacts and the static contacts of any vacuum arc extinguishing chamber. situation and eliminate hidden dangers. Of course, when at least two vacuum interrupters are connected in parallel, the technical effect of compressing elastic members can also be achieved so that after one vacuum interrupter is closed, the movable contacts of the other vacuum interrupters can still be moved by the insulating rods. .

Furthermore, each vacuum arc extinguishing chamber also includes a shell and a static contact. The vacuum arc extinguishing chamber device also includes a static end cover plate and a moving end cover plate. The vacuum arc extinguishing chamber is divided into static ends closest to the static end cover plate. The end arc extinguishing chamber and the transmission arc extinguishing chamber except the static end arc extinguishing chamber. The static contacts of the transmission arc extinguishing chamber are movably assembled on the corresponding housing along the opening and closing direction. The static contacts of the transmission arc extinguishing chamber are An elastic component is arranged between the movable contact of the adjacent vacuum arc extinguishing chamber. The elastic component includes the compression elastic member. The transmission of any arc extinguishing chamber except the transmission arc extinguishing chamber closest to the movable end cover plate The devices are composed of static contacts, movable contacts and elastic components of each transmission arc-extinguishing chamber on the side of any arc-extinguishing chamber close to the moving end cover plate.

The beneficial effects are: on the basis that the static contacts of the transmission arc-extinguishing chamber can move, for any vacuum arc-extinguishing chamber except the transmission arc-extinguishing chamber closest to the moving end cover, the transmission structure has its moving contacts far away from each other. All movable contacts, static contacts and elastic components of the vacuum interrupter at one end of the static end cover can be omitted from the combined bracket, reducing the size of the vacuum interrupter device, which is conducive to the miniaturization of the vacuum interrupter device.

Further, the elastic component is a conductive elastic component used to realize the transmission and electrical connection of two adjacent vacuum arc extinguishing chambers.

The beneficial effect is: by setting the elastic component as a conductive elastic component, the conductive structure (such as a copper bar soft connection) between two adjacent contacts of two adjacent vacuum arc extinguishing chambers can be omitted, thereby simplifying vacuum arc extinguishing. The structure of the chamber device saves the space occupied by the copper bar, which is conducive to the miniaturization of the vacuum circuit breaker.

Furthermore, the compression elastic member is a compression spring, and the elastic component includes a guide sleeve that is sleeved on the compression spring and used to guide the compression spring, a compression rod and a connection that extend into the guide sleeve to compress the compression spring. A retaining ring on the inner wall of the guide sleeve that limits the compression spring and pressure rod to prevent the compression spring and pressure rod from coming out of the guide sleeve.

The beneficial effects are: the guide sleeve can be used to guide the compression spring conveniently, the pressure rod can be used to conveniently change the state of the compression spring, and the retaining ring can be used to place the compression spring and the pressure rod out of the guide sleeve, thereby conveniently using The compression spring controls the opening and closing status of the vacuum arc extinguishing chamber.

Furthermore, the outer circumferential surface of the blocking ring is provided with male threads, the inner wall of the guide sleeve is provided with female threads, and the blocking ring is threadedly connected to the guide sleeve.

The beneficial effect is that the baffle ring and the guide sleeve can be easily connected through the thread, and the relative position of the baffle ring and the guide sleeve can be adjusted through the thread, thereby adjusting the maximum length of the compression elastic member.

Furthermore, a wing plate is provided on the side wall of the pressure rod, and the wing plate includes a guide surface that guides and cooperates with the inner peripheral surface of the guide sleeve to realize the guidance of the pressure rod by the guide sleeve.

The beneficial effect is that the guide sleeve can be used to guide the pressure rod conveniently through the wing plate, so that the pressure rod can smoothly compress the compression spring.

Furthermore, the pressure rod and the guide sleeve are respectively connected to the movable contact and the stationary contact that are drivingly connected between two adjacent vacuum arc extinguishing chambers through a double-headed screw.

The beneficial effect is that the pressure rod and guide sleeve can be easily fixed on the movable contact or the static contact through the double-headed screw. At the same time, different pressure rods, guide sleeves and compression springs can be selected according to needs.

Furthermore, at least one of a set of movable contacts and stationary contacts connected by an elastic component is provided with a reset elastic member elastically connected to the corresponding vacuum arc extinguishing chamber shell, so as to prevent the vacuum arc extinguishing chamber from opening when the vacuum arc extinguishing chamber is opened. Provide opening power for the corresponding moving contacts.

The beneficial effect is that by arranging the reset elastic member, the vacuum arc extinguishing chamber device can be arranged horizontally, or the uppermost vacuum arc extinguishing chamber can be used to connect with the insulating tie rod. When closing, the reset elastic member deforms to accumulate energy; when opening, since the insulating rod can only drive the moving contact of one vacuum interrupter, other moving contacts require opening power. At this time, The reset elastic member recovers and releases energy, thereby causing each vacuum arc extinguishing chamber to open equally.

Furthermore, the reset elastic member is a compression elastic member, and the reset elastic member is arranged between the movable contact and the shell of the vacuum arc extinguishing chamber where the movable contact is located, so as to directly act as the movable contact when the vacuum arc extinguishing chamber is opened. Provide opening power; alternatively, the reset elastic member is a tensile elastic member, and the reset elastic member is connected between the static contact and the shell of the vacuum arc extinguishing chamber where the static contact is located to provide the opening force when the vacuum arc extinguishing chamber is opened. The static contacts provide power, thereby indirectly providing opening power for the same group of movable contacts.

The beneficial effect is that by arranging the reset elastic member between a contact and the shell of the vacuum interrupter corresponding to the contact, the reset elastic member and the elastic component do not overlap in the axial direction of the vacuum interrupter device (i.e. (dislocation arrangement), there is no need to consider the interference between the reset elastic part and the elastic component, and the structure is simple.

Description of the drawings

Figure 1 is a schematic structural diagram of a specific embodiment 1 of the vacuum circuit breaker of the present invention;

Figure 2 is a schematic structural diagram of the first arc extinguishing chamber in the specific embodiment 1 of the vacuum circuit breaker of the present invention;

Figure 3 is a schematic structural diagram of the second arc extinguishing chamber in the specific embodiment 1 of the vacuum circuit breaker of the present invention;

Figure 4 is a schematic structural diagram of the closing state of the vacuum circuit breaker in specific embodiment 1 of the present invention;

Figure 5 is a schematic structural diagram of the overtravel state of the vacuum circuit breaker in specific embodiment 1 of the present invention;

Figure 6 is a schematic structural diagram of the open state of the vacuum circuit breaker in specific embodiment 1 of the present invention;

Figure 7 is a schematic structural diagram of specific embodiment 2 of the vacuum circuit breaker of the present invention;

Figure 8 is a schematic structural diagram of specific embodiment 4 of the vacuum circuit breaker of the present invention.

Explanation of reference symbols:

1. Vacuum interrupter device; 2. Fixed pin; 3. Insulating tie rod; 4. Support sleeve; 5. Transmission pin; 6. Operating mechanism tie rod; 7. Sealing ring; 8. Sealing plug; 9. , bottom cover; 10. operating mechanism; 11. bracket; 12. air pressure monitoring device; 13. static end cover; 14. static end conductor; 15. arc extinguishing chamber casing; 16. first vacuum arc extinguishing chamber ; 17. First double-headed screw; 18. Guide sleeve; 19. Fixing nut; 20. Contact spring; 21. Blocking ring; 22. Pressure rod; 23. Second double-headed screw; 24. Second vacuum extinguisher Arc chamber; 25. Third double-headed screw; 26. Connecting ring; 27. Contact finger base; 28. Strap contact finger; 29. Fastening nut; 30. Connecting barrel; 31. Moving end conductor; 32. Moving end Cover; 33. First cover; 34. Stationary end shield; 35. Stationary contact; 36. Housing; 37. Main shield; 38. Moving contact; 39. Bellows shield; 40. Corrugated tube; 41, second cover; 42, baffle; 43, wing plate; 44, reset elastic member.

Detailed ways

The present invention will be described in further detail below with reference to examples.

In the present invention, the movable contact 38 refers to the contact at the end of the arc extinguishing chamber close to the insulating tie rod 3, and the static contact 35 refers to the contact at the end of the arc extinguishing chamber away from the insulating tie rod 3, regardless of whether the contacts are in action.

Specific embodiment 1 of the vacuum circuit breaker provided by the present invention:

The purpose of this embodiment is to provide a vacuum circuit breaker. By arranging compression elastic parts at the movable contacts of different vacuum arc extinguishing chambers, the movable contacts of the vacuum arc extinguishing chambers that are in contact with the compression elastic parts are first contacted with the static contacts. After the first contact, the insulating pull rod can still drive other movable contacts to move. At this time, the compression elastic member connected to the movable contact that first contacted the static contact continues to compress until the movable contacts of other vacuum arc extinguishing chambers contact the static contact. The contacts are in contact to complete the tight closing of all vacuum interrupters in the vacuum circuit breaker, avoiding the situation where there is still a gap between the movable contacts and static contacts of any vacuum interrupter, and eliminating hidden dangers.

As shown in Figure 1 , this embodiment specifically provides a vacuum circuit breaker, which includes a vertically arranged vacuum arc extinguishing chamber device 1 and an operating mechanism 10 provided at the lower part of the vacuum arc extinguishing chamber device 1. The operating mechanism 10 and There is a support sleeve 4 for supporting the vacuum interrupter device 1 between the vacuum interrupter devices 1. The support sleeve 4 and the vacuum interrupter device 1 are separated by the moving end cover 32 of the vacuum interrupter device 1. , the pillar sleeve 4 is separated from the operating mechanism 10 by the bottom cover 9 of the pillar sleeve 4 . The operating mechanism 10 and the support sleeve 4 are arranged on the bracket 11. The operating mechanism pull rod 6 of the operating mechanism 10 extends into the support sleeve 4 and is fixedly connected to one end of the insulating pull rod 3 through the transmission pin 5. The insulating pull rod 3 The other end extends into the vacuum interrupter device 1 and is fixedly connected to the movable contact 38 of the lowermost vacuum interrupter through the fixed pin 2. The connection between the operating mechanism pull rod 6 and the bottom cover 9 is sealed by a sealing ring 7 and a sealing plug 8 . In this embodiment, the vacuum arc extinguishing chamber device 1 is arranged vertically, and the operating mechanism 10 is located below the vacuum arc extinguishing chamber. However, in other embodiments, the vacuum arc extinguishing chamber device 1 can also be arranged horizontally, or the operating mechanism 10 can be arranged horizontally. The driving mechanism 10 is located above the vacuum arc extinguishing chamber.

As shown in Figures 1-3, the vacuum arc extinguishing chamber device 1 includes an arc extinguishing chamber casing 15 and at least two vacuum arc extinguishing chambers arranged in the arc extinguishing chamber casing 15. Each vacuum arc extinguishing chamber includes a moving contact. 38. The movable contact 38 is connected with a transmission device. The transmission device includes a compression elastic member that is directly or indirectly press-fitted with the movable contact 38. The compression elastic member has a first compression state for opening all vacuum arc extinguishing chambers and a first compression state for opening all vacuum arc extinguishing chambers. In the second compression state when the vacuum arc extinguishing chamber is closed, the compression degree of the compression elastic component in the first compression state is smaller than the compression degree of the compression elastic component in the second compression state. The second compression state of the compression elastic member includes a closing state in which all vacuum arc extinguishing chambers are just closed and an overtravel state in which the compression elastic member is further compressed after the closing state.

Specifically, in this embodiment, as shown in Figures 1-3, only two vacuum arc extinguishing chambers are included. The vacuum arc extinguishing chamber arranged at the uppermost end is the first vacuum arc extinguishing chamber 16, and the vacuum arc extinguishing chamber arranged at the lower end is the first vacuum arc extinguishing chamber 16. The arc chamber is the second vacuum arc extinguishing chamber 24. The static contact 35 of the first vacuum arc extinguishing chamber 16 is used for electrical connection with the outside world. The movable contact 38 of the second vacuum arc extinguishing chamber 24 is used for connecting with the insulating tie rod 3. There is 1 elastic component. However, in other embodiments, three or more vacuum arc extinguishing chambers may also be included, and an elastic component may also be provided at the connection between the second vacuum arc extinguishing chamber 16 and the insulating tie rod, so that the elastic component is connected to the vacuum arc extinguishing chamber. The number of rooms is equal.

By arranging a transmission structure, the compression state of the compression elastic member can be changed when the insulating pull rod 3 moves, thereby changing the pressure exerted by the compression elastic member on the corresponding movable contact 38, so that the elastic component containing the compression elastic member pushes the movable contact 38 to move. , realizing the closing and opening of the vacuum arc extinguishing chamber device 1. Due to the existence of the compression elastic piece, after the movable contact of a vacuum arc extinguishing chamber comes into contact with the static contact, the insulating rod can still drive other movable contacts to move. At this time, the compression elastic piece continues to compress until the other vacuum The movable contacts of the arc extinguishing chamber are in contact with the static contacts, completing the tight closing of all vacuum arc extinguishing chambers in the vacuum arc extinguishing chamber device, and avoiding the gap between the movable contacts and the static contacts of any vacuum arc extinguishing chamber. situation and eliminate hidden dangers. When the compression elastic member is in the overtravel state, the compression elastic member can exert pressure on the two movable contacts 38 immediately adjacent to the compression elastic member, thereby ensuring that the movable contacts 38 overcome the action of electrodynamic force to maintain vacuum under flow conditions. The closing of the arc extinguishing chamber is reliable to avoid safety accidents caused by the bounce-off of contacts due to the action of electric power under flow conditions.

In order to reduce the volume of the vacuum circuit breaker, the combined bracket in the background technology is omitted. In this embodiment, as shown in Figures 1-6, the vacuum arc extinguishing chamber also includes a shell 36 and a static contact 35. Each vacuum arc extinguishing chamber The chambers are connected in series in sequence. The vacuum arc extinguishing chamber device 1 also includes a static end cover 13 and a moving end cover 32. The vacuum arc extinguishing chamber is divided into a static end arc extinguishing chamber closest to the static end cover and a static end arc extinguishing chamber other than the static end arc extinguishing chamber. A transmission arc extinguishing chamber, the static contact of the transmission arc extinguishing chamber is movably assembled on the corresponding housing along the opening and closing direction, and the static contact 35 of the transmission arc extinguishing chamber is connected with the movable contact of the adjacent vacuum arc extinguishing chamber There is an elastic component between 38, and the elastic component includes the above-mentioned compression elastic member. The transmission device of any arc extinguishing chamber except the transmission arc extinguishing chamber closest to the moving end cover is composed of the transmission device of any arc extinguishing chamber close to the moving end. Each drive arc extinguishing chamber on one side of the cover is composed of static contacts 35, movable contacts 38 and elastic components.

Specifically, in this embodiment, the transmission arc extinguishing chamber is the second vacuum arc extinguishing chamber 24, the static end arc extinguishing chamber is the first vacuum arc extinguishing chamber 16, and the moving end arc extinguishing chamber is the second vacuum arc extinguishing chamber 24; The stationary contact 35 of the second vacuum arc extinguishing chamber 24 is movably assembled on the housing 36 along the connecting direction of the stationary contact 35 and the moving contact 38 to realize closing and opening of the vacuum arc extinguishing chamber. As shown in Figure 2, the first vacuum arc extinguishing chamber 16 includes a shell 36 composed of a metallized ceramic shell. The static end of the shell 36 is provided with a static contact 35, a first cover 33 and a static end shield 34. The moving end of the housing 36 is provided with a moving contact 38, a bellows 40, a bellows shield 39 and a second cover 41. The housing 36 is also provided with a static contact 35 for shielding and a moving contact 38 for pulling. The main shield 37 of the arc part.

As shown in FIGS. 2 and 3 , the only difference between the second vacuum arc extinguishing chamber 24 and the first vacuum arc extinguishing chamber 16 is that in the second vacuum arc extinguishing chamber 24 , the static contact 35 is connected to the movable contact along the static contact 35 . The connection direction of the contacts 38 is movably mounted on the housing 36 . The end of the static contact 35 extending out of the housing 36 is provided with a baffle 42 for cooperating with the stop of the housing 36 to limit the extreme position of the motion of the static contact 35 . The limit position of movement of the static contact 35 can be limited by the baffle 42 to prevent all the static contacts 35 from entering the housing 36 and causing the sealing performance of the vacuum arc extinguishing chamber to deteriorate.

On the basis that the static contacts 35 of the transmission arc-extinguishing chamber can move, for any arc-extinguishing chamber except the transmission arc-extinguishing chamber closest to the moving end cover, its transmission device is moved away from the static contact by its movable contact 38 All movable contacts 38, static contacts 35 and elastic components of the vacuum interrupter at one end of the end cover plate 13 are formed, so that the combined bracket can be omitted and the volume of the vacuum interrupter device 1 can be reduced, which is beneficial to the vacuum interrupter. The device 1 is miniaturized.

In order to further reduce the volume of the vacuum arc extinguishing chamber device 1, the copper bar soft connection structure is omitted. In this embodiment, as shown in Figure 4-6, the elastic component is used to realize the transmission circuit of two adjacent vacuum arc extinguishing chambers. Connected conductive elastic components.

By arranging the elastic component as a conductive elastic component, the conductive structure (such as a copper bar soft connection) between two adjacent contacts of two adjacent vacuum arc extinguishing chambers can be omitted, thereby simplifying the construction of the vacuum arc extinguishing chamber device 1 The structure saves the space occupied by the copper bar and is conducive to the miniaturization of the vacuum circuit breaker.

In order to further reduce the volume of the vacuum arc extinguishing chamber, in this embodiment, the elastic component is disposed between the end surface of the stationary contact 35 and the corresponding end surface of the movable contact 38 .

Compared with the technical solution of arranging the transmission structure side by side with the movable contact 38 and the stationary contact 35 , by arranging the elastic component between the end face of the stationary contact 35 and the corresponding end face of the movable contact 38 , it is possible to reduce the The space occupied by the transmission structure and the static contact 35 and the movable contact 38 along the radial direction of the vacuum interrupter device 1. At the same time, by reducing the length of the movable contact 38 and/or the static contact 35, it is possible to ensure that two adjacent The spacing between the vacuum interrupters does not change, that is, the axial length of the vacuum interrupter device 1 does not increase, which is beneficial to the miniaturization of the vacuum interrupter device 1 .

Specifically, in this embodiment, as shown in Figures 2-6, one end of the static contact 35 and/or the movable contact 38 extending out of the housing 36 is provided for transmission with other vacuum interrupters or corresponding outlet structures. The conductive connection structure of the electrical connection, specifically, the conductive connection structure is a threaded hole, the compression elastic member is a compression spring, specifically the contact spring 20, and the elastic component includes a guide sleeve that is sleeved on the compression spring and used to guide the compression elastic member. The barrel 18 and the pressure rod 22 used to extend into the guide sleeve 18 to compress the elastic member are connected to the inner wall of the guide sleeve 18 and limit the compression spring and the pressure rod 22 to prevent the compression spring and the pressure rod 22 from being The retaining ring 21 comes out of the guide sleeve. The center of the blocking ring 21 is provided with a through hole for the pressure rod 22 to slide through. The side wall of the pressure rod 22 is provided with a wing plate 43. The wing plate 43 includes a guide that cooperates with the inner peripheral surface guide of the guide sleeve 18. surface to realize the guidance of the pressure rod 22 by the guide sleeve 18; at the same time, the blocking ring 21 can also be used as a stopper structure to limit the movement of the wing plate 43 and the pressure rod 22 toward the limit position of the compression spring. Since the wall thickness of the guide sleeve 18 is not enough to process threaded holes, the guide sleeve 18 and the corresponding movable contact 38 are fixedly connected through the first double-headed screw 17 and the fixed nut 19; the pressure rod 22 is a solid structure and the wall thickness is sufficient The threaded hole is processed, so the pressure rod 22 and the corresponding static contact 35 are fixedly connected through the second double-headed screw 23 . In this embodiment, the guide sleeve 18 is located above the pressure rod 22 , but in other embodiments, the guide sleeve 18 can also be located below the pressure rod 22 , and the guide sleeve 18 is in contact with the corresponding movable contact 38 Thickening can be provided to machine threaded holes.

The guide structure is set as the guide sleeve 18, which has a simple structure and facilitates the guidance of the pressure rod 22 and the contact spring 20; the pressure rod 22 can compress the contact spring 20 and change the compression state of the contact spring 20, thereby changing the corresponding The opening and closing status of the vacuum arc extinguishing chamber. The retaining ring 21 can prevent the contact spring 20 and the pressure rod 22 from coming out of the guide sleeve 18 during opening; a wing 43 is provided. On the one hand, the wing 43 can cooperate with the inner peripheral surface stop of the guide sleeve 18 In order to realize the guidance of the guide sleeve 18 to the pressure rod 22; on the other hand, the wing plate 43 can also cooperate with the stop ring 21 to limit the maximum extent of the contact spring 20 being compressed by the pressure rod 22.

In order to realize the sliding electrical connection between the movable contact 38 of the second vacuum arc extinguishing chamber 24 and the vacuum arc extinguishing chamber device 1, in this embodiment, as shown in Figure 4, in this embodiment, the arc extinguishing chamber sleeve 15 The upper and lower ends of the arc extinguishing chamber casing 15 are open, and the upper part of the arc extinguishing chamber casing 15 is sealed by the static end cover 13. The static end cover 13 is provided with an air pressure monitoring device 12 for monitoring the internal air pressure of the arc extinguishing chamber casing 15 and for making the vacuum The arc extinguishing chamber device 1 has a static end conductor 14 that is electrically connected to other parts. The lower end of the static end conductor 14 is fixedly connected to the static contact 35 of the first vacuum arc extinguishing chamber 16 . The lower end of the arc extinguishing chamber sleeve 15 is sealed by the moving end cover plate 32. A cylindrical moving end conductor 31 is connected between the moving end cover plate 32 and the second vacuum arc extinguishing chamber 24. The lower end of the housing 36 protrudes outward and forms a connecting ring 26 around the moving contact 38. The outer surface of the connecting ring 26 is provided with male threads, and the inner surface of the upper end of the moving end conductor 31 is provided with female threads. The vacuum arc extinguishing chamber 24 is connected to the moving end conductor 31 through the connecting ring 26 so that the lower end of the movable contact 38 at the lower end of the second vacuum arc extinguishing chamber 24 extends into the interior of the moving end conductor 31, and the moving contact 38 located in the moving end conductor 31 The head 38 is fixedly connected to the fastening nut 29 and the connecting barrel 30 through the third double-headed screw 25. The connecting barrel 30 and the insulating pull rod 3 are fixedly connected through the fixed pin 2. There is also a contact finger base 27 fixedly connected between the moving contact 38 located in the moving end conductor 31 and the connecting barrel 30. A strap contact finger 28 is provided on the side of the contact finger base 27 and is connected to the inner surface of the moving end conductor 31. The moving end conductor 31 and the moving contact 38 located in the moving end conductor 31 are slidingly and electrically connected through the wristband contact finger 28 and the contact finger base 27 .

As shown in Figure 4-6, when using this vacuum circuit breaker, the specific process of the vacuum circuit breaker from the opening position to the closing position is as follows: driven by the operating mechanism 10, the insulating tie rod 3 moves upward, thereby driving the third The movable contact 38 at the lower end of the second vacuum arc extinguishing chamber 24 moves upward, and then the movable contact 38 at the lower end of the second vacuum arc extinguishing chamber 24 contacts the static contact 35 at the upper end of the second vacuum arc extinguishing chamber 24 and drives the second vacuum arc extinguishing chamber. The static contact 35 at the upper end of the arc chamber 24 moves upward to compress the contact spring 20 . Since the contact spring 20 itself is already in the first compression state, when the contact spring 20 is further compressed, the contact spring 20 will drive the movable contact 38 of the first vacuum arc extinguishing chamber 16 to move upward until the first vacuum is reached. The movable contact 38 and the stationary contact 35 of the arc extinguishing chamber 16 come into contact, realizing the common closing of the first vacuum arc extinguishing chamber 16 and the second vacuum arc extinguishing chamber 24. At this time, the contact spring 20 is in the closing state. Subsequently, the operating mechanism 10 continues to move upward, causing the contact spring 20 to be further compressed to the overtravel state. The elastic force generated by the compression of the contact spring 20 will act on the corresponding movable contact 38 or static contact of the contact spring 20 On the head 35, the contacts of the first vacuum arc extinguishing chamber 16 and the second vacuum arc extinguishing chamber 24 can be firmly closed under the flow conditions to overcome the effect of electrodynamic force, thus avoiding safety accidents. That is, in this embodiment, after the second vacuum arc extinguishing chamber 24 is closed, the first vacuum is achieved by compressing the compression elastic member disposed between the first vacuum arc extinguishing chamber 16 and the second vacuum arc extinguishing chamber 24 The arc extinguishing chamber 16 is closed. The specific process of the vacuum circuit breaker from the closing position to the opening position is opposite to the specific process from the opening position to the closing position, and will not be described in detail here.

In the first compression state, the compression elastic member is used to balance all or part of the gravity of the movable contact 38 in contact with it. In this embodiment, since no other elastic member is provided, the compression elastic member (ie, the contact spring 20 ) is used to balance the entire gravity of the corresponding movable contact 38. However, in other embodiments, a connecting portion (which may be a baffle 42) can also be provided at the portion of the movable contact 38 extending out of the housing 36, and the connecting portion can be A tension spring is provided between the corresponding housing 36 to balance the gravity of the movable contact 38 . At this time, the compressed elastic member is used to balance part of the gravity of the corresponding movable contact 38 .

Specific embodiment 2 of the vacuum circuit breaker provided by the present invention:

The purpose of this embodiment is to provide a different arrangement form of a vacuum circuit breaker. The main difference between this embodiment and Specific Embodiment 1 is that in this embodiment, in order to enable the vacuum circuit breaker in this embodiment to be arranged horizontally , in this embodiment, as shown in Figure 7, at least one of a set of movable contacts and static contacts connected through an elastic component is provided with a reset elastic member 44 elastically connected to the corresponding vacuum arc extinguishing chamber shell. , to provide opening power for the corresponding movable contacts when the vacuum arc extinguishing chamber opens.

Specifically, the reset elastic member 44 is a compression elastic member, and the reset elastic member is disposed between the movable contact and the shell of the vacuum arc extinguishing chamber where the movable contact is located, so as to directly act as the movable contact when the vacuum arc extinguishing chamber is opened. Provide opening power; alternatively, the reset elastic member 44 is a tensile elastic member, and the reset elastic member 44 is provided between the static contact and the shell of the vacuum arc extinguishing chamber where the static contact is located to open the gate in the vacuum arc extinguishing chamber. It provides power to the static contacts, thereby indirectly providing opening power to the moving contacts of the same group. In this embodiment, the return elastic member 44 is a compression spring set on the movable contact, and the return elastic member 44 is connected between the baffle 42 and the housing.

By providing the return elastic member 44, the vacuum arc extinguishing chamber device can be arranged horizontally. When closing, the reset elastic member 44 deforms to accumulate energy; when opening, since the insulating rod can only drive the movable contact of one vacuum interrupter to move, other movable contacts require opening power. At this time, , the reset elastic member recovers and releases energy, thereby causing each vacuum arc extinguishing chamber to open equally. By arranging the return elastic member 44 between a contact and the shell of the vacuum interrupter corresponding to the contact, the return elastic member 44 and the contact spring 20 of the elastic assembly are not in the axial direction of the vacuum interrupter device. In the overlapping (i.e., misaligned arrangement), there is no need to consider the interference between the return elastic member 44 and the contact spring 20, and the structure is simple.

Specific embodiment 3 of the vacuum circuit breaker provided by the present invention:

The purpose of this embodiment is to provide a different arrangement of the reset elastic member 44. The main difference between this embodiment and Specific Embodiment 2 is that: in this embodiment, the reset elastic member is a tensile elastic member, and the reset elastic member is configured Between the movable contact and the shell of the vacuum arc extinguishing chamber where the same group of static contacts are located, the opening power is directly provided for the movable contact when the vacuum arc extinguishing chamber is opened; alternatively, the reset elastic member is a compression elastic member, The reset elastic member is arranged between the static contact and the shell of the vacuum arc extinguishing chamber where the same group of movable contacts is located to provide power for the static contact when the vacuum arc extinguishing chamber is opened, thereby indirectly providing power for the same group of movable contacts. Opening power. At this time, the reset elastic member can be sleeved on the static contact, the movable contact and the guide sleeve. The outer peripheral surfaces of the guide sleeve, the static contact and the movable contact together constitute the guide structure of the reset elastic member.

Specific embodiment 4 of the vacuum circuit breaker provided by the present invention:

The purpose of this embodiment is to provide another different arrangement method of the vacuum circuit breaker. The main difference between this embodiment and Specific Embodiment 1 is that in this embodiment, the vacuum circuit breaker is arranged vertically, and the operating mechanism is arranged in the vacuum Above the arc extinguishing chamber device, in order for the uppermost vacuum arc extinguishing chamber to be connected to the insulating tie rod, in this embodiment, as shown in Figure 8, a set of movable contacts and static contacts are connected through elastic components. At least one of them is provided with a reset elastic member 44 elastically connected to the corresponding vacuum arc extinguishing chamber shell to provide opening power for the corresponding movable contact when the vacuum arc extinguishing chamber is opened.

Specifically, the reset elastic member 44 is a stretch elastic member, and the reset elastic member 44 is disposed between the movable contact and the shell of the vacuum arc extinguishing chamber where the movable contact is located, so as to directly act as a movable contact when the vacuum arc extinguishing chamber is opened. The contact provides opening power; alternatively, the reset elastic member 44 is a compression elastic member, and the reset elastic member 44 is provided between the static contact and the shell of the vacuum arc extinguishing chamber where the static contact is located, so as to open the vacuum arc extinguishing chamber when the static contact is located. It provides power to the static contacts when the brake is on, thereby indirectly providing opening power to the moving contacts of the same group. In this embodiment, the return elastic member 44 is a compression spring set on the static contact, and the return elastic member 44 is connected between the baffle 42 and the housing.

By providing the return elastic member 44, the vacuum arc extinguishing chamber device can be arranged vertically and the operating mechanism can be placed upward. When closing, the reset elastic member 44 deforms to accumulate energy; when opening, since the insulating rod can only drive the movable contact of one vacuum interrupter to move, other movable contacts require opening power. At this time, , the reset elastic member recovers and releases energy, thereby causing each vacuum arc extinguishing chamber to open equally. By arranging the return elastic member 44 between a contact and the shell of the vacuum interrupter corresponding to the contact, the return elastic member 44 and the contact spring 20 of the elastic assembly are not in the axial direction of the vacuum interrupter device. In the overlapping (i.e., misaligned arrangement), there is no need to consider the interference between the return elastic member 44 and the contact spring 20, and the structure is simple.

Specific embodiment 5 of the vacuum circuit breaker provided by the present invention:

The purpose of this embodiment is to provide a different vacuum circuit breaker. The main difference between this embodiment and Specific Embodiment 1 is that in this embodiment, at least two vacuum arc extinguishing chambers are arranged in parallel, and the transmission device includes an insulating pull rod. Fixedly connected horizontal bars and vertical bars directly or indirectly connected to the movable contacts of each vacuum arc extinguishing chamber. Each vertical bar is provided with a compression elastic member, or, except for one vertical bar, all other vertical bars are provided with Compression elastic. The compression elastic member may be in contact with the movable contact, or may not be in contact with the movable contact. When a certain compression elastic member is not in contact with the movable contact, the corresponding vertical rod includes a first vertical rod and a second vertical rod, and the compression elastic member The piece is arranged between two vertical rods, and one end of the two vertical rods away from the compression elastic piece is connected to the horizontal rod and the movable contact respectively.

Specific Embodiment 6 of the vacuum circuit breaker provided by the present invention:

The purpose of this embodiment is to provide a different transmission structure. The main difference between this embodiment and Specific Embodiment 1 is that: in this embodiment, the transmission structure is a combination bracket described in the patent document in the background art. The combination bracket An elastic component is arranged between the corresponding moving contact and the elastic component includes a compression elastic piece. The number of elastic components can be n. At this time, all movable contacts are equipped with compression elastic parts. During the process of moving the combination bracket for closing, the movable contacts of the vacuum arc extinguishing chamber that is closed first The compression elastic parts are continuously compressed until all vacuum arc extinguishing chambers are closed; the number of elastic components can also be n-1. At this time, by controlling the length of the movable contact, it is ensured that the movable contact is not set at the compression elastic part. When the contacts are in contact with the static contacts, all other movable contacts are in contact with the movable contacts under the action of the compressed elastic parts. That is, except for the movable contacts where the compressed elastic parts are not provided, the rest of the vacuum arc extinguishing chambers are closed. Close. At this time, move the combination bracket again until all vacuum interrupters are closed.

Specific embodiment 7 of the vacuum circuit breaker provided by the present invention:

The purpose of this embodiment is to provide a non-conductive elastic component. The main difference between this embodiment and Specific Embodiment 1 is that in this embodiment, the compression elastic component is a non-conductive material made of carbon fiber or rubber or other materials. elastic member, or provide insulating parts at both ends of the contact spring to make the elastic component non-conductive. At this time, like the patent documents in the background art, the two adjacent contacts of the two adjacent vacuum arc extinguishing chambers can be electrically connected through a copper bar soft connection. Of course, the movable contacts of all vacuum arc extinguishing chambers can also be connected in parallel through conductive rows, so that the vacuum arc extinguishing chambers in the vacuum circuit breaker are connected in parallel.

Specific embodiment 8 of the vacuum circuit breaker provided by the present invention:

The purpose of this embodiment is to provide a different arrangement method of the elastic component. The main difference between this embodiment and Specific Embodiment 1 is that: in this embodiment, the side walls on opposite sides of the static contact are fixedly provided with a third A support plate, the movable contact is provided with a second support plate corresponding to the first support plate, and the pressure rod and the guide sleeve are fixedly connected to the first support plate and the second support plate respectively.

Specific embodiment 9 of the vacuum circuit breaker provided by the present invention:

The purpose of this embodiment is to provide a different elastic component. The main difference between this embodiment and Specific Embodiment 1 is that: in this embodiment, the elastic component does not include a retaining ring and a wing plate, and the outer surface of the pressure rod is directly connected to The inner surface of the guide sleeve has a clearance fit so that the guide sleeve can guide the pressure rod; the guide sleeve is set to be long enough to prevent the pressure rod from coming out of the guide sleeve.

Specific embodiment 10 of the vacuum circuit breaker provided by the present invention:

The purpose of this embodiment is to provide another different elastic component. The main difference between this embodiment and Specific Embodiment 1 is that: in this embodiment, the two ends of the compression elastic component are respectively connected with the end faces of the static contacts and the corresponding The end faces of the moving contacts are connected, and the compression elastic parts are rubber columns. Under normal circumstances, when one vacuum interrupter is closed, the gap between the movable contact and the static contact of the other vacuum interrupter is very small. By directly pressing the static contact to compress the elastic member, the rubber column is After deformation, all movable contacts and static contacts of the vacuum interrupter can be in close contact.

Specific embodiment 11 of the vacuum circuit breaker provided by the present invention:

The purpose of this embodiment is to provide a different baffle ring. The main difference between this embodiment and Specific Embodiment 1 is that in this embodiment, the baffle ring is a split ring, including a first baffle ring and a second baffle ring. The two parts, the first blocking ring and the second blocking ring, are respectively provided with clamping blocks or slots. When in use, after the first baffle ring and the second baffle ring are clamped on the pressure rod through the clamping block and the clamping groove, the baffle ring is welded on the guide sleeve.

Specific embodiment 1 of the vacuum arc extinguishing chamber device provided by the present invention:

The purpose of this embodiment is to provide a vacuum arc extinguishing chamber device. By arranging compression elastic members at the movable contacts of different vacuum arc extinguishing chambers, the movable contacts of the vacuum arc extinguishing chambers that are in contact with the compression elastic members are first contacted with After the static contacts come into contact, the insulating pull rod can still drive other movable contacts to move. At this time, the compression elastic member connected to the movable contact that first contacted the static contacts continues to compress until the movable contacts of other vacuum arc extinguishing chambers. Contact with the static contacts to complete the tight closing of all vacuum interrupters in the vacuum interrupter device, avoiding the situation where there is still a gap between the movable contact and the static contact of any vacuum interrupter, and eliminating hidden dangers.

The specific structure of the vacuum interrupter device in this embodiment is the same as the structure of the vacuum interrupter device in any one of the above-mentioned specific embodiments 1 to 11 of the vacuum circuit breaker, and will not be described again here.

Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still The technical solutions described in the foregoing embodiments may be modified without any creative effort, or some of the technical features may be equivalently replaced. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A vacuum arc extinguishing chamber device, including an arc extinguishing chamber casing and at least two vacuum arc extinguishing chambers arranged in the arc extinguishing chamber casing. Each vacuum arc extinguishing chamber includes a movable contact, and the movable contact is connected with a The transmission device is characterized in that the transmission device includes a compression elastic member that is directly or indirectly press-fitted with the movable contact, and the compression elastic member has a first compression state to open all vacuum arc-extinguishing chambers and a first compression state to enable all vacuum arc-extinguishing chambers to open. In the second compression state of the chamber closing, the compression degree of the compression elastic member in the first compression state is smaller than the compression degree of the compression elastic member in the second compression state. 2. The vacuum arc extinguishing chamber device according to claim 1, wherein each vacuum arc extinguishing chamber further includes a shell and a static contact, and the vacuum arc extinguishing chamber device further includes a static end cover plate and a moving end cover plate. , the vacuum arc extinguishing chamber is divided into a static end arc extinguishing chamber closest to the static end cover plate and a transmission arc extinguishing chamber other than the static end arc extinguishing chamber. The static contacts of the transmission arc extinguishing chamber can be movable along the opening and closing direction. On the corresponding housing, an elastic component is provided between the static contact of the transmission arc extinguishing chamber and the movable contact of the adjacent vacuum arc extinguishing chamber. The elastic component includes the compression elastic member, except for the one closest to the moving end cover. The transmission device of any arc-extinguishing chamber other than the arc-extinguishing chamber is composed of the static contacts, movable contacts and elastic contacts of each arc-extinguishing chamber on the side of the arc-extinguishing chamber close to the moving end cover. Component composition. 3. The vacuum arc extinguishing chamber device according to claim 2, wherein the elastic component is a conductive elastic component used to realize the transmission and electrical connection of two adjacent vacuum arc extinguishing chambers. 4. The vacuum arc extinguishing chamber device according to claim 2 or 3, characterized in that the compression elastic member is a compression spring, and the elastic component includes a guide sleeve that is sleeved on the compression spring and used to guide the compression spring. A compression rod that extends into the guide sleeve to compress the compression spring and a retaining ring that is connected to the inner wall of the guide sleeve and limits the compression spring and compression rod to prevent the compression spring and compression rod from coming out of the guide sleeve. . 5. The vacuum arc extinguishing chamber device according to claim 4, wherein the outer circumferential surface of the baffle ring is provided with male threads, and the inner wall of the guide sleeve is provided with female threads, and the baffle ring and the guide sleeve are Barrel thread connection. 6. The vacuum interrupter device according to claim 4, characterized in that a wing plate is provided on the side wall of the pressure rod, and the wing plate includes a guide surface that cooperates with the inner peripheral surface of the guide sleeve to achieve guidance. The sleeve guides the pressure rod. 7. The vacuum arc extinguishing chamber device according to claim 4, characterized in that the pressure rod and the guide sleeve are respectively connected to the movable contact and the transmission connection between the two adjacent vacuum arc extinguishing chambers through a double-headed screw. Still touching the head. 8. The vacuum interrupter device according to claim 2 or 3, characterized in that at least one of a set of movable contacts and static contacts connected by an elastic component is provided with a corresponding vacuum interrupter shell. The reset elastic member is elastically connected to provide opening power for the corresponding movable contact when the vacuum arc extinguishing chamber is opened. 9. The vacuum arc extinguishing chamber device according to claim 8, characterized in that the reset elastic member is a compression elastic member, and the reset elastic member is disposed between the movable contact and the shell of the vacuum interrupter where the movable contact is located. When the vacuum arc extinguishing chamber is opened, it can directly provide opening power for the movable contact; or, the reset elastic member is a tensile elastic member, and the reset elastic member is connected between the static contact and the vacuum arc extinguishing chamber where the static contact is located. between the shells to provide power for the static contacts when the vacuum arc extinguishing chamber opens, thereby indirectly providing opening power for the same group of movable contacts. 10. A vacuum circuit breaker, comprising a vacuum arc extinguishing chamber device and an operating mechanism, characterized in that the vacuum arc extinguishing chamber device is the vacuum arc extinguishing chamber device according to any one of claims 1-9.