CN114429880A - A vacuum interrupter assembly and vacuum circuit breaker - Google Patents

Abstract

The invention provides a vacuum arc extinguish chamber assembly and a vacuum circuit breaker, wherein the vacuum circuit breaker comprises an operating mechanism and a vacuum arc extinguish chamber assembly, the vacuum arc extinguish chamber assembly comprises a movable support and a vacuum arc extinguish chamber supported and installed on the movable support, one end of the vacuum arc extinguish chamber, which faces the movable support, is an arc extinguish chamber movable end, the arc extinguish chamber movable end comprises a movable end conducting rod movable end, one end of the conducting rod, which faces the movable support, is connected with a conducting seat, and the conducting seat is assembled in the movable support in a sliding manner and is in conductive communication with the movable support; the movable support is internally provided with a spring cylinder in a sliding way, a guide block is installed in the spring cylinder in a guiding way, one end of the guide block penetrates out of the spring cylinder, a spring is arranged between the guide block and the spring cylinder in a pressing way, one of the spring cylinder and the guide block is connected with a movable end conducting rod or a conducting seat, and the other is connected with the operating mechanism through a pull rod. The vacuum arc-extinguishing chamber assembly provided by the invention solves the problem that the moving contact is easy to bounce by using the pressing force provided by the spring on the premise of not increasing the size of the vacuum circuit breaker.

Description

A vacuum interrupter assembly and vacuum circuit breaker

technical field

The invention relates to the technical field of vacuum circuit breakers, in particular to a vacuum interrupter assembly and a vacuum circuit breaker.

Background technique

High-voltage circuit breakers are the most important control and protection equipment in the power system. At present, almost all high-voltage circuit breakers are SF ₆ circuit breakers. However, SF ₆ gas is the strongest greenhouse effect gas restricted by international conventions. Therefore, The development of environmentally friendly switchgear to replace SF ₆ circuit breakers has become an inevitable trend in the field of high-voltage switches.

In fact, in the prior art, in addition to SF ₆ circuit breakers, vacuum circuit breakers are mostly used. The structure of the vacuum circuit breaker is shown in the Chinese invention patent application with the application publication number CN112216552A. The vacuum circuit breaker includes a moving support (that is, the conductive support cylinder in this patent), an arc-extinguishing chamber is supported and installed on the movable support, the lower end of the arc-extinguishing chamber is the arc-extinguishing chamber movable end, and the arc-extinguishing chamber movable end includes a downwardly extending movable conductive rod. The upper end is provided with a moving contact, and the lower end of the moving conductive rod is connected with an insulating pull rod. The insulating pull rod is used to drive and connect the operating mechanism. When in use, the operating mechanism drives the moving conductive rod to reciprocate up and down through the insulating pull rod to control the arc extinguishing chamber. Closing and opening operations.

At present, the applicable voltage level of the vacuum circuit breaker is lower than that of the SF ₆ circuit breaker. In order to improve the applicable voltage level of the vacuum circuit breaker, in addition to improving the breaking capacity of the contacts, it is also necessary to provide an operation with a larger operating power. It is equipped with a corresponding buffer structure to minimize the bounce of the moving contact during the opening and closing process, and realize the effective closing and opening of the breaking unit.

In the prior art, the buffer structure equipped with the operating mechanism is mostly as shown in the utility model patent with the authorization announcement number CN2476091Y, which provides a device for preventing the closing and bouncing of the vacuum circuit breaker. That is, the lower end of the guide rod in this patent is provided with an anti-bounce spring and a spring baffle, and the damping effect of the anti-bounce spring is used to eliminate the factors that cause the closing bounce. However, since the device arranges the bouncing spring and the spring baffle at the lower end of the insulating pull rod, the size of the entire device will be increased in the transmission direction of the insulating pull rod. In addition, the exposed and protruding arrangement of the bouncing spring and the spring baffle greatly affects the appearance.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a vacuum interrupter assembly, so as to solve the technical problems of large size and insufficient aesthetics of the vacuum circuit breaker for preventing closing and bouncing in the prior art. Meanwhile, the present invention also provides a vacuum circuit breaker to solve the above problems.

The vacuum interrupter assembly provided by the present invention adopts the following technical solutions:

The vacuum interrupter assembly includes a movable support and a vacuum interrupter supported and installed on the movable support. The end of the vacuum interrupter facing the movable support is the movable end of the arc interrupter. The movable end of the chamber includes a movable end conductive rod, one end of the movable end conductive rod facing the movable support is connected with a conductive seat, the conductive seat is slidably assembled in the movable support and is in conductive communication with the movable support ; A spring cylinder is also slidably assembled in the movable support, a guide block is guided and installed in the spring cylinder, one end of the guide block is protruded from the spring cylinder, and the guide block and the spring cylinder are press-fitted There is a spring, one of the spring cylinder and the guide block is connected with the moving end conductive rod or the conductive seat, and the other is connected with a pull rod for connecting with the operating mechanism, the conductive seat and the conductive seat At least one guide in the spring barrel is fitted in the movable support.

Beneficial effects: When the vacuum interrupter provided by the present invention is assembled in use, by arranging the spring cylinder, the guide block and the spring in the movable support, the inner space of the movable support is reasonably utilized, and the size of the vacuum circuit breaker is not increased. On the premise, the pressing force provided by the spring is used to solve the problem that the movable contact is prone to bounce; at the same time, the conductive connection between the conductive seat and the movable support can be used to realize the conductive connection between the conductive rod at the movable end and the movable support; The conductive seat and the spring cylinder are guided and assembled with the movable support, which can ensure that the conductive seat and the spring cylinder are not easily stuck when they are guided and moved in the movable support.

Further, the connecting end of the movable end conductive rod and the conductive seat includes a large-diameter section and a small-diameter section, a stepped surface is formed between the large-diameter section and the small-diameter section, and the small-diameter section penetrates the conductive rod. The small diameter section is threadedly fitted with a nut, and the nut cooperates with the stepped surface to compress the conductive seat and the spring barrel.

Beneficial effects: Pressing the conductive seat with the stopper and the stepped surface can make the large diameter section close to the conductive seat, on the one hand, the flow area can be increased; The force is directly transmitted to the large-diameter section, avoiding direct force on the small-diameter section, and protecting the small-diameter section.

Further, a groove is arranged on the side of the conductive seat facing the large-diameter section, and the large-diameter section of the movable end conductive rod is adapted to penetrate into the groove and is in conductive communication with the groove wall of the groove. .

Beneficial effects: the large diameter section penetrates into the groove and is electrically connected with the groove, which can increase the contact area between the conductive seat and the conductive rod at the moving end, so that a larger flow can be realized between the conductive seat and the conductive rod at the moving end.

Further, a guide ring is provided between the conductive seat, the spring cylinder and the pull rod and the movable support, so that the conductive seat, the spring cylinder and the pull rod are coaxially assembled in the movable support and can be moved along the movable support. The axial direction of the movable support is guided and slid.

Beneficial effect: A guide ring is arranged between the conductive seat, the spring cylinder, the pull rod and the movable support, which can make the conductive seat, the spring cylinder and the pull rod guide and move more stably in the movable support, and it is not easy to sway, so that the whole circuit is broken The device can run stably.

Further, the end of the spring barrel is provided with an end cover to prevent the guide block from sliding out of the spring barrel, the guide block is protruded from the end cover, and there is an end cover between the guide block and the end cover. guide ring.

Beneficial effects: the guide block is press-fitted into the spring cylinder through the end cover, which can facilitate the disassembly and assembly of the guide block; a guide ring is arranged between the guide block and the end cover to make the guiding between the guide block and the end cover smoother.

The vacuum circuit breaker provided by the present invention adopts the following technical solutions:

The vacuum circuit breaker includes an operating mechanism and a vacuum interrupter assembly. The vacuum interrupter assembly includes a movable support and a vacuum interrupter supported and installed on the movable support. The vacuum interrupter faces upwards. One end of the movable support is the movable end of the arc extinguishing chamber, the movable end of the arc extinguishing chamber includes a movable end conductive rod, and one end of the movable end conductive rod toward the movable support is connected with a conductive seat, and the conductive seat is slidably assembled In the movable support and in conductive communication with the movable support; a spring cylinder is slidably assembled in the movable support, a guide block is guided and installed in the spring cylinder, and one end of the guide block is passed through the spring cylinder. A spring is press-fitted between the guide block and the spring cylinder, and one of the spring cylinder and the guide block is connected to the moving end conductive rod or the conductive seat, and the other is connected to the conductive rod through the pull rod. The operating mechanism is connected, and at least one of the conductive seat and the spring barrel is guided and assembled in the movable support.

Beneficial effects: In the vacuum circuit breaker provided by the present invention, by arranging the spring cylinder, the guide block and the spring in the movable support, the inner space of the movable support is reasonably utilized, and on the premise of not increasing the size of the vacuum circuit breaker, The pressing force provided by the spring is used to solve the problem that the movable contact is prone to bouncing; at the same time, the conductive base and the movable support are conductively connected to realize the conductive connection between the conductive rod at the movable end and the movable support; in addition, the conductive seat and the spring are connected. The guide assembly of the cylinder and the movable support can ensure that the conductive base and the spring cylinder are not easily stuck when they are guided and moved in the movable support.

Further, the connecting end of the movable end conductive rod and the conductive seat includes a large diameter section and a small diameter section, a stepped surface is formed between the large diameter section and the small diameter section, and the small diameter section penetrates the conductive rod. The small diameter section is threadedly fitted with a nut, and the nut cooperates with the stepped surface to compress the conductive seat and the spring barrel.

Beneficial effects: Pressing the conductive seat with the stopper and the stepped surface can make the large diameter section close to the conductive seat, on the one hand, the flow area can be increased; The force is directly transmitted to the large-diameter section, avoiding direct force on the small-diameter section, and protecting the small-diameter section.

Further, a groove is arranged on the side of the conductive seat facing the large-diameter section, and the large-diameter section of the movable end conductive rod is adapted to penetrate into the groove and is in conductive communication with the groove wall of the groove. .

Beneficial effects: the large diameter section penetrates into the groove and is electrically connected with the groove, which can increase the contact area between the conductive seat and the conductive rod at the moving end, so that a larger flow can be realized between the conductive seat and the conductive rod at the moving end.

Further, a guide ring is provided between the conductive seat, the spring cylinder and the pull rod and the movable support, so that the conductive seat, the spring cylinder and the pull rod are coaxially assembled in the movable support and can be moved along the movable support. The axial direction of the movable support is guided and slid.

Beneficial effect: A guide ring is arranged between the conductive seat, the spring cylinder, the pull rod and the movable support, which can make the conductive seat, the spring cylinder and the pull rod guide and move more stably in the movable support, and it is not easy to sway, so that the whole circuit is broken The device can run stably.

Further, the end of the spring barrel is provided with an end cover to prevent the guide block from sliding out of the spring barrel, the guide block passes through the end cover, and a guide block is provided between the end cover and the end cover. guide ring.

Beneficial effects: the guide block is press-fitted into the spring cylinder through the end cover, which can facilitate the disassembly and assembly of the guide block; a guide ring is arranged between the guide block and the end cover to make the guiding between the guide block and the end cover smoother.

Description of drawings

Fig. 1 is the structural representation of the vacuum circuit breaker provided by the present invention;

Fig. 2 is the structural representation of the monopole in Fig. 1;

Fig. 3 is the structural representation of vacuum interrupter assembly in Fig. 2;

Fig. 4 is the structural representation after removing the movable support and the arc-extinguishing casing in Fig. 3;

FIG. 5 is a schematic structural diagram of the vacuum interrupter in FIG. 4 .

The names of the components corresponding to the corresponding reference numbers in the figure are:

100, beam; 200, bracket; 300, operating mechanism; 301, interphase pull rod; 302, crank arm box; 303, transmission shaft; 304, crank arm; 305, insulating pull rod; 306, pull rod; 400, monopole; 401 501, the fourth guide ring; 502, the spring cylinder; 503, the second guide ring; 504, the spring; 505, the guide block; 506, the end Cover; 507, the third guide ring; 508, the conductive seat; 509, the strap contact finger; 510, the first guide ring; 511, the groove; 600, the vacuum interrupter; 601, the movable end of the interrupter; 602, Moving end conductive rod; 603, small diameter section; 604, nut; 605, spacer; 606, large diameter section; 607, moving contact; 608, guide sleeve; 609, bellows; 610, static end of arc extinguishing chamber; 611 612, static contact; 613, ceramic shell; 614, arc extinguishing chamber sleeve; 615, shielding cover; 700, static support; 701, cooling cap.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

It should be noted that, in the specific implementation of the present invention, terms that may appear, such as “first” and “second” and other relational terms are only used to distinguish one entity or operation from another entity or operation , without necessarily requiring or implying any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising", "comprising" or any other variation thereof that may appear are intended to encompass a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, but also Other elements not expressly listed or inherent to such a process, method, article or apparatus are also included. Without further limitation, the appearance of the phrase "comprising a..." etc. qualifying elements does not preclude the presence of additional identical elements in the process, method, article or device that includes the element.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" that may appear should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, Or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal communication between two elements. Those skilled in the art can understand the specific meanings of the above terms in the present invention through specific situations.

In the description of the present invention, unless otherwise expressly specified and limited, the term "provided" that may appear should be understood in a broad sense. For example, the object "provided with" may be a part of the body or a separate body from the body. Arranged and connected on the body, the connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meanings of the above terms in the present invention through specific situations.

The present invention will be further described in detail below in conjunction with the embodiments.

Embodiment 1 of vacuum circuit breaker in the present invention:

As shown in FIG. 1 , the vacuum circuit breaker provided in this embodiment includes a vacuum interrupter assembly 402 and an operating mechanism 300 , and the vacuum interrupter assembly 402 includes a movable support 500 and a vacuum interrupter 600 . The vacuum interrupter 600 The movable end conductive rod 602 is provided inside, and the movable end conductive rod 602 is connected with the pull rod 306 through the conductive seat 508 and the spring cylinder 502 in the movable support 500 , wherein the pull rod 306 is connected with the operating mechanism 300 . When the vacuum interrupter 600 is closed, the operating mechanism 300 drives the moving end conductive rod 602 to act through the pull rod 306 to complete the closing. When closing, the spring 504 in the spring barrel 502 is in a compressed state and applies a pressing force to the moving end conductive rod 602 to prevent the moving contact 607 from bouncing.

Specifically, the vacuum circuit breaker includes a three-phase single pole 400 , the three-phase single pole 400 is arranged on the beam 100 in an inline shape, and is fixedly connected to the beam 100 by bolts. The spacing between adjacent monopoles 400 is 1100mm. On the underside of the beam 100 are arranged two brackets 200 supporting the beam 100 . An operating mechanism 300 is arranged between the two brackets 200 , and the operating mechanism 300 drives the three monopoles 400 through the interphase pull rods 301 to realize opening and closing at the same time. In this embodiment, the linkage between the three monopoles 400 and the interphase tie rods 301 is the prior art, which will not be repeated here, and the structures of the three monopoles 400 in this embodiment are the same, and only one of them is taken as an example below. for a detailed introduction.

In this embodiment, as shown in FIG. 2 , the operating mechanism 300 includes a crank arm box 302 , which is installed in the beam 100 , and a drive shaft 303 and a crank arm 304 are arranged inside the crank arm case 302 . The inter-phase tie rods 301 are connected by transmission through the transmission shaft 303, and the turning arm 304 is connected with the lower end of the insulating tie rod 305. 305 is arranged in the strut sleeve 401, the strut sleeve 401 extends in the up-down direction, the upper end of the strut sleeve 401 supports and installs the vacuum interrupter assembly 402, and the lower end of the strut sleeve 401 is supported on the beam 100 and is located on the corresponding arm The upper side of the box 304 .

In this embodiment, as shown in FIG. 3 , the vacuum interrupter assembly 402 includes an interrupter sleeve 614 , a movable support 500 , and a vacuum interrupter 600 supported and installed on the movable support 500 . The vacuum interrupter 600 Extending in the up-down direction and located in the arc extinguishing chamber sleeve 614, the movable support 500 is fixed on the arc extinguishing chamber sleeve 614, and the movable support 500 is used for connecting the movable terminal. The vacuum interrupter 600 includes a ceramic shell 613 , one end of the vacuum interrupter 600 facing the movable support 500 is the arc interrupter moving end 601 , and the other end of the vacuum interrupter 600 is the arc interrupter static end 610 . The movable end 601 of the arc extinguishing chamber includes a movable end conductive rod 602, the movable end conductive rod 602 extends in the up-down direction, the lower end of the movable end conductive rod 602 is connected with the conductive seat 508, and the lower end of the ceramic shell 613 is provided with a guide sleeve 608 and a bellows 609 , the guide sleeve 608 is located on the outside of the ceramic shell 613, the bellows 609 is located on the inside of the ceramic shell 613, the bellows 609 and the ceramic shell 613 together form a closed space, and the upper end of the movable end conductive rod 602 passes through the guide sleeve 608 and the bellows in turn, The movable contact 607 on the upper end of the movable end conductive rod 602 is located in the ceramic shell 613 .

In this embodiment, a static support 700 is supported and installed on the upper end of the arc extinguishing chamber sleeve 614 , and a heat dissipation cap 701 is arranged on the upper side of the static support 700 . When the static support 700 fails to dissipate heat, the excess heat is exchanged with the outside air by convection through the heat dissipation cap 701 to achieve dynamic balance. The end of the vacuum interrupter 600 facing the static support 700 is the static The static end 610 of the arc extinguishing chamber includes a static end conductive rod 611. The static end conductive rod 611 is connected to the lower side of the static support 700 by bolts, and the lower end of the static end conductive rod 611 extends into the ceramic shell 613, so that the static end The static contact 612 at the lower end of the conductive rod 611 is located in the ceramic shell 613. As shown in FIG. 5, the movable contact 607 and the static contact 612 are both located in the ceramic shell 613. There is a shielding cover 615. The shielding cover 615 is mainly used to improve the electric field distribution inside the vacuum interrupter 600, to prevent the contacts from generating a large amount of metal vapor and droplet splashing during the arcing process, causing pollution to the inner wall of the ceramic shell 613, and at the same time. It is also avoided that the dielectric strength of the ceramic shell 613 is lowered or flashover occurs. In addition, the shielding cover 615 can also absorb a part of the arc energy and condensate arc products, especially when the vacuum interrupter 600 breaks the short-circuit current, most of the heat generated by the arc is absorbed by the shielding cover 615, which is beneficial to improve the contact between the contacts. Medium recovery strength. The greater the amount of arc products absorbed by the shielding cover 615, the greater the energy absorbed by the shielding cover 615, which is helpful for the large-capacity breaking of the vacuum interrupter 600.

In this embodiment, as shown in FIG. 3 and FIG. 4 , the conductive base 508 is slidably assembled in the movable support 500 , and the conductive base 508 and the movable support 500 are connected by a strap contact finger 509 , where the strap contact finger 509 has a total of 248 pieces, and the theoretical flow is 12400A. A first guide ring 510 is arranged between the conductive seat 508 and the movable support 500 , the first guide ring 510 is arranged on the outer peripheral surface of the conductive seat 508 , and the conductive seat 508 is guided and assembled in the movable support 500 through the first guide ring 510 . In addition, the movable support 500 is provided with a spring cylinder 502, and the extension direction of the spring cylinder 502 is the up-down direction. On the outer peripheral surface of the lower part, the spring cylinder 502 is guided and assembled in the movable support 500 through the second guide ring 503 . A guide block 505 is guided and installed in the spring cylinder 502. A spring 504 is press-fitted between the guide block 505 and the spring cylinder 502. The guide block 505 is inserted into the spring cylinder 502 from the lower end of the spring cylinder 502. The end cap 506 prevents the guide block 505 from slipping out of the spring barrel 502 . The lower end of the guide block 505 is penetrated by the end cover 506 and connected to the pull rod 306 , and the upper end of the spring cylinder 502 is connected to the lower end of the movable end conductive rod 602 . In addition, a third guide ring 507 is provided between the lower end of the guide block 505 and the end cover 506 , and the end cover 506 and the guide block 505 are guided and matched by the third guide ring 507 . A fourth guide ring 501 is provided between the pull rod 306 and the movable support 500 , and the pull rod 306 and the movable support 500 are guided and matched by the fourth guide ring 501 .

In this embodiment, the lower end of the moving end conductive rod 602 includes a large diameter section 606 and a small diameter section 602 , a stepped surface is formed between the small diameter section 602 and the large diameter section 606 , and the small diameter section 602 penetrates the conductive seat 508 and extends from the upper end of the spring cylinder 502 After penetration, a nut 604 is threaded on the small diameter section 602, and the nut 604 presses the spring barrel 502 and clamps the spring barrel 502 and the conductive seat 508 through the cooperation with the stepped surface. In addition, the side of the conductive seat 508 facing the large diameter section 606 is provided with a groove 511, the size of the annular recess 511 is consistent with the outer circumference of the large diameter section 606, and the annular recess 511 forms an escape portion, so that the large diameter section 606 can extend into the conductive In the seat 508, the contact area between the large diameter section 606 and the conductive seat 508 is increased to achieve greater flow. In addition, in order to increase the pressing area of the nut 604 against the spring cylinder 502 , a spacer 605 is provided between the nut 604 and the spring cylinder 502 .

In this embodiment, the movable contact 607 and the static contact 612 both adopt the structure of the horseshoe-type longitudinal magnetic contact. During the capacity breaking process, a magnetic circuit mainly composed of ferromagnetic materials is formed between the two contacts, which enhances the The magnetic field strength of the gap improves the breaking capacity and can meet the requirement of 40kA short-circuit breaking current.

In this embodiment, when the vacuum circuit breaker is closed, the operating structure 300 drives the transmission shaft 303 and the arm 304 to move through the interphase pull rod 301 , and then drives the insulating pull rod 305 to move upward through the arm 304 , and the insulating pull rod 305 is pushed up by the pull rod 306 Push the spring barrel 502 to move upward along the movable support 500, and under the push of the spring barrel 502, the moving end conductive rod 602 moves upward, and the movable contact 607 on the upper end of the movable end conductive rod 602 contacts the static contact 612. At this time, continue to make the pull rod 306 Up, push the guide block 505 to compress the spring 504, try to keep the moving contact 607 and the static contact 612 in a pressed state, minimize the bounce of the moving contact 607 during the closing process, and realize the effective closing of the breaking unit. When the vacuum circuit breaker is opened, the operating structure 300 drives the insulating pull rod 305 to descend, the insulating pull rod 305 pulls the spring cylinder 502 through the pull rod 306, and the moving end conductive rod 602 descends under the drive of the spring cylinder 502, so that the moving and static contacts are separated. , complete the opening of the vacuum circuit breaker.

Embodiment 2 of the vacuum circuit breaker in the present invention:

The difference between this embodiment and Embodiment 1 is that, in Embodiment 1, the guide block protrudes from the lower end of the spring cylinder and is connected with the pull rod. However, in this embodiment, the guide block protrudes from the upper end of the spring cylinder and is connected with the conductive rod at the movable end, and at this time, the pull rod is connected with the spring cylinder.

Embodiment 3 of vacuum circuit breaker in the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, both the conductive seat and the spring cylinder are guided and assembled in the movable support. However, in this embodiment, the conductive base is guided and assembled in the movable support, and the spring cylinder and the movable support have no guiding and assembling relationship. In other embodiments, the spring barrel is guided and assembled in the movable support, and the conductive seat and the movable support have no guiding and assembling relationship.

Embodiment 4 of the vacuum circuit breaker in the present invention:

The difference between this embodiment and Embodiment 1 is that, in Embodiment 1, the conductive seat is pressed and fixed on the conductive rod at the movable end through the nut and the stepped surface. In this embodiment, a nut is provided on each side of the conductive seat, and the conductive seat is fixed on the movable end conductive rod by the clamping action of the two nuts. At this time, the conductive seat may fit with the spring barrel, or may be arranged independently of the spring barrel. When the conductive seat and the spring barrel are no longer in contact, the spring barrel can be directly fixed on the conductive rod at the moving end, specifically by clamping with two nuts or threading; the spring barrel can also be installed on the conductive rod through a screw seat.

Embodiment 5 of the vacuum circuit breaker in the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, a guide ring is provided between the guide block and the end cover. However, in this embodiment, the guide ring between the guide block and the end cover is canceled, and the guide of the guide block depends on the guide of the pull rod and the movable support and the guide of the guide block and the spring cylinder.

The embodiment of vacuum interrupter assembly in the present invention:

The assembly of the vacuum interrupter in this embodiment has the same structure as that of the vacuum interrupter in Embodiment 1 of the vacuum circuit breaker, and will not be repeated here.

In other embodiments, the structure for assembling the vacuum interrupter may also adopt the structure for assembling the vacuum interrupter in any of the above-mentioned Embodiments 2 to 5 of the vacuum circuit breaker, which will not be repeated here.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. The scope of patent protection of the present invention is subject to the claims. Any equivalent structural changes made by using the contents of the description and drawings of the present invention, Similarly, all should be included in the protection scope of the present invention.

Claims (10)

1. The vacuum arc extinguish chamber assembly comprises a movable support (500) and a vacuum arc extinguish chamber (600) which is supported and installed on the movable support (500), wherein one end, facing the movable support (500), of the vacuum arc extinguish chamber (600) is a movable end (601) of the arc extinguish chamber, the movable end (601) of the arc extinguish chamber comprises a movable end conducting rod (602), and the vacuum arc extinguish chamber assembly is characterized in that one end, facing the movable support (500), of the movable end conducting rod (602) is connected with a conducting seat (508), the conducting seat (508) is assembled in the movable support (500) in a sliding mode and is in conductive communication with the movable support (500); the movable support (500) is further provided with a spring barrel (502) in a sliding mode, a guide block (505) is installed in the spring barrel (502) in a guiding mode, one end of the guide block (505) penetrates out of the spring barrel (502), a spring (504) is installed between the guide block (505) and the spring barrel (502) in a pressing mode, one of the spring barrel (502) and the guide block (505) is connected with the movable end conducting rod (602) or the conducting seat (508), the other one of the spring barrel and the guide block is connected with a pull rod (306) used for being connected with an operating mechanism (300), and at least one of the conducting seat (508) and the spring barrel (502) is installed in the movable support (500) in a guiding mode.

2. The vacuum interrupter assembly according to claim 1, wherein the end of the movable end conducting rod (602) connected to the conducting seat (508) comprises a large diameter section (606) and a small diameter section (603), a step surface is formed between the large diameter section (606) and the small diameter section (603), the small diameter section (603) penetrates through the conducting seat (508) and penetrates into the spring tube (502), a nut (604) is screwed on the small diameter section (603), and the nut (604) is matched with the step surface to press the conducting seat (508) and the spring tube (502).

3. Vacuum interrupter assembly according to claim 2, characterized in that a recess (511) is arranged in the contact base (508) towards the side of the large diameter section (606), and the large diameter section (606) of the moving end contact rod (602) is adapted to penetrate into the recess (511) and is in conductive communication with the wall of the recess (511).

4. Vacuum interrupter assembly according to any of the claims 1 to 3, characterized in that guiding rings are provided between the conductive base (508), the spring cartridge (502) and the pull rod (306) and the movable support (500), so that the conductive base (508), the spring cartridge (502) and the pull rod (306) are coaxially mounted in the movable support (500) and can be guided to slide along the axial direction of the movable support (500).

5. Vacuum interrupter assembly according to claim 4 characterized in that the end of the spring cartridge (502) is provided with an end cap (506) preventing the guiding block (505) from sliding out of the spring cartridge (502), the guiding block (505) is passed out of the end cap (506), and a guiding ring is provided between the guiding block (505) and the end cap (506).

6. The vacuum circuit breaker comprises an operating mechanism (300) and a vacuum arc extinguish chamber assembly (402), wherein the vacuum arc extinguish chamber assembly (402) comprises a movable support (500) and a vacuum arc extinguish chamber (600) which is supported and installed on the movable support (500), one end, facing the movable support (500), of the vacuum arc extinguish chamber (600) is an arc extinguish chamber movable end (601), and the arc extinguish chamber movable end (601) comprises a movable end conducting rod (602), and the vacuum circuit breaker is characterized in that one end, facing the movable support (500), of the movable end conducting rod (602) is connected with a conducting seat (508), and the conducting seat (508) is assembled in the movable support (500) in a sliding mode and is in conductive communication with the movable support (500); the movable support (500) is internally provided with a spring barrel (502) in a sliding way, a guide block (505) is installed in the spring barrel (502) in a guiding way, one end of the guide block (505) penetrates out of the spring barrel (502), a spring (504) is installed between the guide block (505) and the spring barrel (502) in a pressing way, one of the spring barrel (502) and the guide block (505) is connected with the movable end conducting rod (602) or the conducting seat (508), the other one is connected with the operating mechanism (300) through a pull rod (306), and at least one of the conducting seat (508) and the spring barrel (502) is installed in the movable support (500) in a guiding way.

7. The vacuum circuit breaker according to claim 6, wherein the end of the movable end conducting rod (602) connected to the conducting seat (508) comprises a large diameter section (606) and a small diameter section (603), a step surface is formed between the large diameter section (606) and the small diameter section (603), the small diameter section (603) penetrates through the conducting seat (508) and penetrates into the spring cylinder (502), a nut (604) is screwed on the small diameter section (603), and the nut (604) is matched with the step surface to press the conducting seat (508) and the spring cylinder (502).

8. The vacuum interrupter as claimed in claim 7, wherein a groove (511) is formed in the conductive seat (508) toward a side of the large diameter section (606), and the large diameter section (606) of the moving end conductive rod (602) is adapted to penetrate into the groove (511) and is in conductive communication with a groove wall of the groove (511).

9. Vacuum interrupter according to any of the claims 6 to 8, characterized in that guiding rings are provided between the current conducting base (508), the spring cartridge (502) and the pull rod (306) and the movable support (500), so that the current conducting base (508), the spring cartridge (502) and the pull rod (306) are coaxially mounted in the movable support (500) and can be guided and slid along the axis of the movable support (500).

10. Vacuum interrupter according to claim 9, characterized in that the end of the spring cartridge (502) is provided with an end cap (506) preventing the guide block (505) from sliding out of the spring cartridge (502), the guide block (505) is passed out of the end cap (506), and a guide ring is provided between the guide block (505) and the end cap (506).

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