CN113555252A

CN113555252A - Vacuum circuit breaker for gas insulation

Info

Publication number: CN113555252A
Application number: CN202110801202.6A
Authority: CN
Inventors: 木林森; 王安心; 徐文; 詹华栋; 李泽正
Original assignee: Murge Electric Co ltd
Current assignee: Murge Electric Co ltd
Priority date: 2021-05-27
Filing date: 2021-07-15
Publication date: 2021-10-26
Also published as: CN215644280U; CN113571372A; CN113571375A; CN215933461U; CN215933472U; CN215934285U; CN215934280U; CN215644169U; CN215933476U; CN215934279U; CN113572075A

Abstract

The invention discloses a vacuum circuit breaker for gas insulation, which comprises a circuit breaker pole, a circuit breaker operating device and a dynamic sealing device, wherein the circuit breaker pole comprises a guide rod, the circuit breaker operating device comprises a main shaft and a power output mechanism, the dynamic sealing device controls the sealing state of the guide rod, the main shaft is linked with the power output mechanism, and the power output mechanism is linked with the guide rod to control the switching-on and switching-off operations of the vacuum circuit breaker.

Description

Vacuum circuit breaker for gas insulation

Technical Field

The invention belongs to the technical field of switch cabinets, and relates to a vacuum circuit breaker for gas insulation.

Background

The circuit breaker switch cabinet drives the main shaft through the circuit breaker operating mechanism, the main shaft controls the contact and separation of the moving contact and the static contact through the complicated transmission mechanism, the energy consumption of transmission path loss is large, the transmission efficiency is low, in addition, the pole column and the operating device of the gas vacuum circuit breaker are installed in different chambers in the cabinet, higher requirements are put forward on the sealing performance so as to ensure the safety of operators and the switch cabinet, the existing dynamic sealing device has the advantages of complicated structure, complex installation and high manufacturing cost, and the replacement is needed due to the axis offset of the circuit breaker after long-time use, and the invention effectively solves the problems.

Disclosure of Invention

The present invention provides a vacuum circuit breaker for gas insulation in order to overcome the disadvantages of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a vacuum interrupter for gas insulation, characterized by: the circuit breaker pole comprises a guide rod, the circuit breaker operating device comprises a main shaft and a power output mechanism, the dynamic sealing device controls the sealing state of the guide rod, the main shaft is linked with the power output mechanism, the power output mechanism is linked with the guide rod, and the opening and closing operation of the vacuum circuit breaker is controlled.

Further, the method comprises the following steps of; the circuit breaker operating device is installed at the circuit breaker box, and the circuit breaker box is installed at the circuit breaker mounting panel, and the circuit breaker utmost point post is installed at utmost point post mounting panel, and the circuit breaker mounting panel passes through sealing device to be installed at the cubical switchboard, and utmost point post mounting panel sets firmly on the circuit breaker mounting panel, and dynamic seal device sets firmly with the circuit breaker mounting panel and is connected.

Further, the method comprises the following steps of; power take off mechanism and circuit breaker utmost point post one-to-one, power take off mechanism includes the circuit breaker link plate, two sets of circuit breaker link plate horizontal symmetry sets up, be provided with circuit breaker even board between two sets of circuit breaker link plates, the output and the circuit breaker link plate top of circuit breaker even board are rotated and are connected, the middle-end that the circuit breaker even board sets firmly surplus groove, it is equipped with circuit breaker round pin spare to remain the inslot, circuit breaker round pin spare is connected with the guide arm, the removal regulation hole has set firmly on the circuit breaker link plate, circuit breaker round pin spare slides along removing the regulation hole, the input of circuit breaker even board rotates and is provided with spring assembly, power take off mechanism passes through the circuit breaker turning arm and is connected with the main shaft, the circuit breaker turning arm sets firmly with the main shaft and is connected, circuit breaker turning arm output is connected with spring assembly rotation.

Further, the method comprises the following steps of; the dynamic sealing device comprises a dynamic sealing shaft sleeve, a shaft sleeve cover plate and a fine adjustment mechanism, wherein the dynamic sealing shaft sleeve comprises a sealing assembly and a guide assembly, the sealing assembly is used for sealing the guide rod, the guide assembly is used for guiding the guide rod, and the fine adjustment mechanism adjusts the position of the guide rod.

Further, the method comprises the following steps of; the shaft sleeve cover plate is fixedly connected with the dynamic seal shaft sleeve, the shaft sleeve cover plate is fixedly provided with a through cavity, the dynamic seal shaft sleeve is composed of a first shaft sleeve and a second shaft sleeve, a first cavity is fixedly arranged in the first shaft sleeve, a second cavity is fixedly arranged in the second shaft sleeve, and the first cavity and the second cavity are coaxially arranged.

Further, the method comprises the following steps of; the circuit breaker mounting panel is last to set firmly the mounting hole, and the mounting hole is joined in marriage with the second shaft cover, and the mounting hole is inserted to the second shaft cover, and first axle sleeve terminal surface offsets with the circuit breaker mounting panel, and the circuit breaker mounting panel passes through fastening screw fixed connection with first axle sleeve.

Further, the method comprises the following steps of; the sealing assembly comprises a first sealing ring, a sealing sleeve, a first sealing piece and a second sealing piece, the first sealing ring is used for sealing between the dynamic sealing device and the circuit breaker mounting plate, the sealing sleeve, the first sealing piece and the second sealing piece are used for sealing a guide rod which does reciprocating motion, a sealing cavity is fixedly arranged on the end face of the first shaft sleeve, and the first sealing ring is arranged in the sealing cavity.

Further, the method comprises the following steps of; the guide rod runs through in proper order and runs through chamber, first cavity and second cavity, and the input of guide rod is located the circuit breaker box, and the output of guide rod is located the circuit breaker utmost point post, and the seal cover is installed in first cavity, and the seal cover is established at the guide rod surface, and the seal cover inboard has set firmly the first cavity of indent type, and first sealing member is installed at first cavity, and first sealing member cover is established at the guide rod surface, and the seal cover outside has set firmly the second cavity of indent type, and the second sealing member is installed at the second cavity.

Further, the method comprises the following steps of; the guide assembly comprises a circuit breaker guide sleeve, the circuit breaker guide sleeve is fixedly arranged in the second cavity, the circuit breaker guide sleeve is sleeved on the guide rod, and the circuit breaker guide sleeve guides the movement of the guide rod.

Further, the method comprises the following steps of; the fine adjustment mechanism comprises a cover plate mounting hole fixedly arranged on the cover plate of the shaft sleeve and a shaft sleeve mounting hole fixedly arranged on the first shaft sleeve, the cover plate mounting hole is larger than the shaft sleeve mounting hole, the diameter of the penetrating cavity is larger than that of the guide rod, a gap exists between the cover plate mounting hole and the guide rod, and the offset of the guide rod is adjusted by adjusting the position of the guide rod in the penetrating cavity.

In conclusion, the invention has the advantages that:

1. according to the invention, the guide rod of the vacuum circuit breaker is arranged outside the pole of the circuit breaker, the power output mechanism is designed to be linked with the guide rod, the switching-on and switching-off power of the operating device is directly transmitted to the guide rod, a plurality of transmission links are reduced, the energy consumption is reduced, the transmission efficiency is ensured to the greatest extent, the motion of the guide rod controls the contact and separation of the moving contact and the static contact, and the switching-on and switching-off of the vacuum circuit breaker is further controlled to operate the vacuum circuit breaker.

2. The invention ensures that the guide rod keeps a sealing state in the linear reciprocating motion process by optimizing the structure of the dynamic sealing device, has a simpler structure, seals the dynamic sealing device and the breaker mounting plate through the first sealing ring, seals the guide rod which does reciprocating motion through the sealing sleeve, the first sealing element and the second sealing element, and ensures that the guide rod is in a real-time sealing state in the moving process by designing double sealing in the moving direction of the guide rod.

3. The guide sleeve of the circuit breaker is designed to guide the movement of the guide rod, so that the guide rod is prevented from deviating in the movement process.

4. The invention adjusts the position of the guide rod through the fine adjustment mechanism and adjusts the offset of the guide rod, thereby ensuring that the guide rod keeps a sealing state and transmission effect after being used for a long time

Drawings

Fig. 1 is a schematic distribution diagram of the internal devices of the switch cabinet of the present invention.

Fig. 2 is a schematic view of the sealing device and gas box access panel installation of the present invention.

Fig. 3 is a schematic sectional view of a-a in fig. 2.

Fig. 4 is an exploded view of the sealing device of the present invention.

Fig. 5 is an enlarged schematic view of B in fig. 3.

FIG. 6 is a schematic view of the operation device of the present invention.

FIG. 7 is a schematic view of the three-position mechanism of the present invention with the indicator panel removed.

Fig. 8 is a schematic view of the installation of the transmission assembly of the present invention.

FIG. 9 is a schematic view of a selector plate of the present invention.

Fig. 10 is a first schematic view of an auxiliary apparatus according to the present invention.

Fig. 11 is a second schematic view of the auxiliary device of the present invention.

Fig. 12 is a schematic view of an interlock device of the present invention.

Fig. 13 is a schematic view of a first reset baffle of the present invention.

Fig. 14 is a schematic view of a vacuum circuit breaker of the present invention.

Fig. 15 is a schematic view of the circuit breaker operating device of the present invention.

Fig. 16 is a front view of the dynamic seal device of the present invention.

Fig. 17 is a rear view of the dynamic seal apparatus of the present invention.

Fig. 18 is a sectional view of C-C in fig. 16.

Fig. 19 is an enlarged schematic view of D in fig. 18.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.

All directional indicators (such as up, down, left, right, front, rear, lateral, longitudinal … …) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the movement, etc. in a particular posture, and if the particular posture is changed, the directional indicator is changed accordingly.

The first embodiment is as follows:

as shown in fig. 1-19, a vacuum circuit breaker for gas insulation is installed in a gas insulated switchgear, the switchgear includes a cabinet body 1, a gas tank 2, an operating device 3 and a vacuum circuit breaker 4 are arranged in the cabinet body 1, a sealing device 21 for sealing is arranged on the gas tank 2, the operating device 3 includes a three-position mechanism 31 and an interlocking device 32 for preventing the three-position switch from being operated in a live state, the vacuum circuit breaker 4 includes a circuit breaker pole 41 and a circuit breaker operating device, and the two are hermetically connected through a dynamic sealing device 46.

The gas box 2 adopts an insulating gas medium, preferably sulfur hexafluoride gas, in the embodiment, a main bus inflating compartment 22 and a breaker inflating compartment 23 are arranged in the gas box, a small bus chamber 11, an instrument chamber 12, an operating mechanism chamber 13 and a cable chamber 14 are arranged in the cabinet body 1, a main loop of the three-position switch is installed in the main bus inflating compartment 22, the operating device 3 of the three-position switch is installed outside the main bus inflating compartment 22, namely inside the operating mechanism chamber 13, sealing parts are arranged at the main loop of the three-position switch and the installing position of the operating device 3 of the main bus inflating compartment 22 to realize the sealing connection between the inside and the outside of the compartment, and the functions of the three-position switch, such as work, isolation and grounding, and the interlocking of all functions are realized.

The breaker pole 41 is installed in the breaker inflation compartment 23, the breaker operation device is installed outside the breaker inflation compartment 23, namely in the operation mechanism chamber 13, the dynamic sealing device 46 is arranged in the breaker inflation compartment 23 and located at the installation position of the breaker pole 41 and the breaker operation device, and dynamic sealing connection is achieved through the dynamic sealing device 46.

The switch cabinet is provided with a front upper door 121 positioned on the front side and used for an instrument room 12, a front lower door 131 used for an operating mechanism room 13, a rear upper sealing plate 151, a rear middle sealing plate 152 and a rear lower door 153 positioned on the rear side, the front upper door is assembled, the front upper door 121 is assembled with an opening and closing button, an indicator light, a microcomputer protection device, a current voltmeter and the like, the front lower door 131 is assembled with an observation window capable of observing a gas density meter, a three-position switch and a circuit breaker indication, the front lower door 131 is assembled with a circuit breaker emergency opening button, an interlocking mechanism is arranged between the operating mechanism and the front lower door to ensure safety, the rear upper sealing plate 151, the rear middle sealing plate 152 and the rear lower door 153 can be interlocked, and the rear lower door 153 is assembled with an observation window, an illuminating lamp and an electric interlocking.

In this embodiment, an independent pressure release channel is provided in the cable chamber 14, an upper frame is provided on the front surface of the small bus chamber 11, the upper frame can be used for setting an Iogo of a company and the application of a switch cabinet, the small bus chamber 11 is used for laying a small bus, a power supply required by a control loop or an auxiliary loop is provided for the switch cabinet, and is connected with an adjacent cabinet through a terminal, a relay protection element, an instrument, a live monitoring indicator and various secondary devices are installed in the instrument chamber 12, the cable chamber 14 is used for supporting the gas tank 2, installing and protecting the cable, and the main bus inflating compartment 22 and the breaker inflating compartment 23 are provided with independent sealing devices.

The sealing device 21 comprises a sealing cover plate 211, a sealing ring 212, a sealing partition plate 213 and a sealing gasket 214, wherein the sealing partition plate 213 and the sealing gasket 214 are fixedly arranged on the sealing cover plate 211, the sealing partition plate 213 and the sealing gasket 214 form a sealing cavity 216 for mounting the sealing ring 212, and the sealing ring 212 and the sealing gasket 214 perform double sealing.

The sealing cover plate 211 is fixedly provided with a cover plate through hole 2111, and the sealing cover plate 211 is of a square structure.

The sealing partition plates 213 are provided with a plurality of groups, preferably four groups, the four groups of sealing partition plates 213 form a limiting assembly for limiting the sealing rings 212, the four groups of sealing partition plates 213 in the limiting assembly are connected end to form a square ring structure, the limiting assembly is installed on the sealing cover plate 211, and the limiting assembly is installed in the axial direction of the cover plate through hole 2111.

In this embodiment, the sealing gasket 214 is a square ring structure, the sealing gasket 214 is installed on the sealing cover plate 211, and is installed on the same side of the sealing cover plate 211 as the limiting component, the limiting component is located in an inner ring of the sealing gasket 214, as shown in fig. 5, the limiting component and the sealing gasket 214 form a sealing cavity 216, the sealing cavity 216 is a square ring structure, the sealing ring 212 is installed in the sealing cavity 216, that is, the sealing ring 212 is located between the limiting component and the sealing gasket 214, a double sealing function is realized through the sealing ring 212 and the sealing gasket 214, so that the gas tank 2 becomes a sealed container, and safety of an operator and a switch cabinet is ensured.

As shown in fig. 2, the sealing device 21 is installed on the gas tank 2, for convenience of description, in this embodiment, a side plate of the gas tank 2 on which the sealing device 21 is installed is referred to as a gas tank access panel 20, specifically, a cover plate fixing hole 2112 is fixedly installed on the sealing cover plate 211, a plurality of groups of cover plate fixing holes 2112 are provided, and are distributed on the sealing cover plate 211 in a rectangular shape, a gasket fixing hole 2141 is fixedly installed on the gasket 214, the gasket fixing holes 2141 correspond to the cover plate fixing holes 2112 one to one, a stud 215 is fixedly installed on the gas tank access panel 20, the stud 215 corresponds to the gasket fixing hole 2141 and the cover plate fixing hole 2112 one to one, the stud 215 sequentially penetrates through the gasket fixing hole 2141 and the cover plate fixing hole 2112 to perform a positioning function, and the fixed connection is implemented by using the existing method, such as welding, screwing, and the like, which is not further described herein.

The gas box access panel 20 is provided with a component mounting inlet and outlet (not shown), components are sequentially mounted inside the gas box 2 through the mounting inlet and outlet, after the mounting is finished, the sealing device 21 is mounted on the gas box access panel 20 to seal the mounting inlet and outlet, the sealing property of the gas box 2 is ensured through the double-sealing design of the sealing device 21,

the sealing device 21 can be applied separately to existing inflatable cabinets.

The operating device 3 comprises a three-position mechanism 31, an auxiliary device 313 and an interlocking device 32, the three-position mechanism 31 comprises an electric operating component, a manual operating component and a transmission mechanism, the electric operating component or the manual operating component controls the state of the three-position switch through the transmission mechanism, the auxiliary device 313 outputs an electric signal of the position of the three-position mechanism, and the interlocking device 32 is used for preventing the three-position switch from being operated in an electrified mode.

The three-position mechanism 31 comprises a frame 310 and a control device 312, the control device 312 comprises an electric operating component, a manual operating component and a transmission mechanism, and the electric operating component or the manual operating component controls the state of the three-position switch by controlling the transmission component.

The three-station mechanism can be independently applied to the existing inflating cabinet.

The frame 310 includes a first mechanism plate 3101 and a second mechanism plate 3102, the first mechanism plate 3101 and the second mechanism plate 3102 are fixedly connected by a frame column 3103, the first mechanism plate 3101 and the second mechanism plate 3102 form a first mounting cavity, in this embodiment, the first mechanism plate 3101 and the second mechanism plate 3102 are arranged in parallel.

The electric operation assembly comprises a three-position motor 3121, the three-position motor 3121 is installed in the first installation cavity and fixedly connected with the second mechanism plate 3102, an output shaft of the three-position motor 3121 rotatably penetrates through the second mechanism plate 3102, as shown in fig. 8, the output shaft positioned at the outer side of the second mechanism plate 3102 is connected with a transmission mechanism, power is transmitted through the transmission mechanism, and the switching on and off operation of the three-position switch is realized.

The transmission mechanism comprises a power assembly and a transmission assembly, the power assembly comprises a transmission shaft 3145 and a transmission screw rod 3146, the transmission shaft 3145 and the transmission screw rod 3146 are rotatably connected with a first mechanism plate 3101 and a second mechanism plate 3102, the input end and the output end of the transmission shaft 3145 are respectively and rotatably penetrated through the second mechanism plate 3102 and the first mechanism plate 3101, the input end of the transmission screw rod 3146 is rotatably penetrated through the second mechanism plate 3102, the output end of the transmission screw rod 3146 is rotatably connected with the first mechanism plate 3101, the output end of the transmission shaft 3145 is connected with a main loop of the three-position switch, the input end of the transmission shaft 3145 is connected with the transmission assembly, the transmission shaft 3145 receives the power transmitted by the transmission assembly and transmits the power to the main loop of the three-position switch, and the on-off operation of the three-position switch is realized.

The transmission assembly is positioned outside the second mechanism plate 3102 and comprises a transmission gear 3141, a transition gear 3142, an operation gear 3143 and a drive gear 3144, the transmission gear 3141, the transition gear 3142, the operation gear 3143 and the drive gear 3144 are distributed along the transverse direction and are sequentially meshed and connected in pairs, the transmission gear 3141 is fixedly arranged on an output shaft of a three-position motor 3121, the output shaft of the three-position motor 3121 drives the transmission gear 3141 to rotate, the transition gear 3142 is rotatably connected with the second mechanism plate 3102, the operation gear 3143 is fixedly connected with an input end of a transmission shaft 3145, the operation gear 3143 rotates to drive the transmission shaft 3145 to rotate, so as to realize the power input of the transmission screw 3145, the drive gear 3144 is fixedly connected with the transmission screw 3146, the drive gear 3144 rotates to drive the transmission screw 3146 to rotate, so as to realize the power input of the transmission screw 3146, specifically, the three-position motor 3121 is started to drive the transmission gear 3141 to rotate, the transmission gear 3141 drives the transition gear 3142 to rotate, the transition gear 3142 drives the operating gear 3143 to rotate, the operating gear 3143 drives the driving gear 3144 to rotate, the transmission shaft 3145 transmits power to a main loop of the three-position switch, and the opening and closing operation of the three-position switch is electrically controlled through the above.

In this embodiment, the three-position switch integrates manual operation and electric operation, the manual operation assembly includes a first operation port 315 and a second operation port 316, as shown in fig. 8, the first operation port 315 is fixedly disposed at an input end of the transmission screw 3146 or integrally formed with the transmission screw 3146, the second operation port 316 is fixedly disposed at an input end of the transmission shaft 3145 or integrally formed with the transmission shaft 3145, the transmission shaft 3145 or the transmission screw 3146 is directly driven to rotate by manual operation, and switching on and off and grounding operation of the three-position switch are achieved.

In the embodiment, the linear transmission is performed through the transmission shaft 3145 and the transmission lead screw 3146, so that the motion transmission efficiency is improved.

To achieve the purpose, the three-position switch comprises a selection device, the selection device comprises a selection plate 3171, the selection plate 3171 is positioned outside the second mechanism plate 3102 and is in sliding connection with the second mechanism plate 3102, specifically, a waist-shaped hole (not shown) is fixedly connected and fixed on the second mechanism plate 3102 in a sliding connection manner, a baffle guide rod 3173 and a leaf spring shifting rod 3174 which are in sliding connection with the waist-shaped hole are fixedly arranged on the selection plate 3171, the sliding direction of the selection plate 3171 is limited, a first operation hole 3174 and a second operation hole 3175 are further arranged on the selection plate 3171, the first operation hole 3174 and the second operation hole 3175 are positioned on the same horizontal plane with the first operation port 315 and the second operation port 316, and the center distance between the first operation hole 3174 and the second operation hole 3175 is larger than the center distance between the first operation port 315 and the second operation port 316, the first operation port 315 and the second operation port 316 are located between the first operation hole 3174 and the second operation hole 3175, the selection plate 3171 is further fixedly provided with a shift lever 3172, and the shift lever 3172 is manually moved to drive the selection plate 3171 to move right to enable the first operation hole 3174 to be opposite to the first operation port 315, and at this time, the transmission screw 3146 is manually operated, or the selection plate 3171 is driven to move left to enable the second operation hole 3175 to be opposite to the second operation port 316, and at this time, the transmission shaft 3145 is manually operated.

A linkage device is arranged between the control device 312 and the auxiliary device 313, the movement of the control device 312 is transmitted to the auxiliary device 313 through the linkage device, the linkage of the auxiliary device 313 is realized, and therefore the electric signal of the position of the three-position mechanism is output.

The linkage device comprises a sliding block 3121, the sliding block 3121 is in sliding connection with a transmission shaft 3145 and is in threaded connection with a transmission lead screw 3146, the transmission lead screw 3146 rotates to drive the sliding block 3121 to slide along the direction of the transmission shaft 3145, a push rod 3122 is fixedly arranged on the sliding block 3121, the push rod 3122 moves along with the sliding block 3121, and power is transmitted to the auxiliary device 313 when the push rod 3122 moves.

The auxiliary device 313 includes an auxiliary housing 3131, an auxiliary switch 3132 and a switching link 3135, the auxiliary switch 3132 being mounted on the auxiliary housing 3131, the switching link 3135 being in linkage with a driving assembly of the three-position mechanism, the auxiliary switch 3132 outputting an electrical signal of the position of the three-position mechanism, and a spring assembly for switching and restoring the position of the auxiliary switch 3132.

The sub-frame 3131 includes a first sub-mechanism plate 31311 and a second sub-mechanism plate 31312, the sub-switches 3132 are provided in two sets and are symmetrically installed between the first sub-mechanism plate 31311 and the second sub-mechanism plate 31312, generally, the first sub-mechanism plate 31311 and the second sub-mechanism plate 31312 are disposed in parallel, and the sub-output shaft 31321 of the sub-switch 3132 rotatably penetrates the first sub-mechanism plate 31311 and the second sub-mechanism plate 31312.

The switching linkage 3135 is provided with two sets, which are connected to the auxiliary switches 3132 in a one-to-one correspondence, the switching linkage 3135 includes a first linkage 31351, a second linkage 31352, a third linkage 31353 and a fourth linkage 31354, the first linkage 31351, the second linkage 31352, the third linkage 31353 and the fourth linkage 31354 are sequentially and rotatably connected end to end, the first linkage 31351 and the fourth linkage 31354 are respectively and rotatably connected to the first auxiliary mechanism plate 31311, a push block 3137 is fixedly mounted on the first linkage 31351 and the fourth linkage 31354, the push rod 3122 interferes with the push block 3137, that is, the push rod 3122 moves to drive the push block 3137 to rotate, so that the first linkage 31351 and the fourth linkage 31354 rotate, the second linkage 31352 and the third linkage 31353 are rotatably connected to the auxiliary output shaft 31321 through an adapter plate 31355, and transmission of the second linkage 31352 and the third linkage 31353 is limited.

A plurality of micro switches 31351 are fixed on the first auxiliary mechanism plate 31311, one group of micro switches 31351 is located below the first link 31351, the other group is located below the fourth link 31354, the micro switches 31351 are used for signal reception, specifically, when the push rod 3122 drives the push block 3137 to rotate, the first link 31351 is driven to rotate, the first link 31351 contacts with the micro switch 31351, the micro switch 31351 receives the signal and transmits the signal to the auxiliary switch 31351, at this time, the auxiliary switch 31351 outputs a signal that the three-position mechanism is located at the grounding position, when the push rod 3122 drives the push block 3137 to rotate, the fourth link 31354 is driven to rotate, the first link 31351 contacts with the micro switch 31351, the micro switch 31351 receives the signal and transmits the signal to the auxiliary switch 31351, at this time, the auxiliary switch 31351 outputs a signal that the three-position mechanism is located at the isolating position, the linkage device continues to operate, so that the push rod 3122 drives the push block 3137 of the other group of conversion link 3135 to rotate, the other set of first connecting rods 31351 is in contact with the corresponding micro switches 31351, and at this time, the auxiliary switch 31351 outputs a signal that the three-position mechanism is located at the switch-on position, and this embodiment realizes that multiple sets of micro switches 31351 are arranged in one operating cycle in a linkage manner with the three-position mechanism operating device to receive electrical signals when the three positions are located at different positions, so as to avoid the problem that the linkage device moves to a position beyond the limit position.

The auxiliary device can be independently applied to the existing inflatable cabinet.

The spring assembly includes an auxiliary switch limiting plate 3133 and an auxiliary switch tension spring 3134, the auxiliary switch limiting plate 3133 is provided with two sets, and the horizontal symmetry is set, one set of auxiliary switch limiting plate 3133 corresponds to one set of micro switch 31351, the two sets of auxiliary switch limiting plates 3133 are connected through two sets of auxiliary switch tension springs 3134, the auxiliary switch limiting plate 3133 is provided with a long rod, the long rod is located in the auxiliary switch tension spring 3134, so that the auxiliary switch tension spring 3134 is maintained in a specific direction in the stretching or restoring process.

An auxiliary switch limiting plate 3133 is slidably connected to the second auxiliary mechanism plate 31312, an auxiliary switch limiting rod 31312 is fixed on the second auxiliary mechanism plate 31312, a corresponding auxiliary switch limiting groove 31331 is fixed on the auxiliary switch limiting plate 3133, the auxiliary switch limiting rod 31312 is located in the auxiliary switch limiting groove 31331 to limit the moving direction of the auxiliary switch limiting plate 3133, an auxiliary switch crank arm 31322 is fixed on an auxiliary output shaft 31321 penetrating the second auxiliary mechanism plate 31312, an auxiliary switch push rod 31323 is fixed on the auxiliary switch crank arm 31322, a driving groove 31332 is arranged on the auxiliary limiting plate 3133, the auxiliary switch push rod 31323 is located in the driving groove 31332, during the implementation, the auxiliary output shaft 31321 is driven to rotate by the converting link device 3135 under the action of the linkage device, the auxiliary switch push rod 31323 is driven to rotate when the auxiliary output shaft 31321 rotates, the auxiliary switch push rod 31323 drives the auxiliary switch limiting plate 3133 to move, at this time, the auxiliary switch tension spring 3134 is in a tension position, and after the linkage moves to make the linkage applied to the switching linkage 3135 disappear, the auxiliary switch tension spring 3134 is restored to make the auxiliary output shaft 31321 rotate reversely to return to the initial position, and in this embodiment, the quick switching function of the auxiliary switch is realized by the auxiliary switch tension spring 3134.

The interlocking device 32 comprises an interlocking transmission assembly 321, an interlocking input assembly 322 and an interlocking output assembly 323, the switching-on and switching-off operation of the vacuum circuit breaker 4 controls the output action of the interlocking input assembly 322, and the interlocking output assembly 323 controls the operation of the control device 312 of the three-position mechanism 31.

The interlock input assembly 322 includes a first input connecting lever 3221 and a second input connecting lever 3222, the second input connecting lever 3222 is fixedly connected to the main shaft 42 of the vacuum circuit breaker 4, and the first input connecting lever 3221 is rotatably connected to an output end of the second input connecting lever 3222, in this embodiment, when the vacuum circuit breaker 4 is opened, an output shaft thereof rotates clockwise (in the direction of an arrow shown in fig. 12), and at this time, the second input connecting lever 3222 moves upward under the driving of the second input connecting lever 3222, so as to transmit the input motion of the vacuum circuit breaker 4 to the interlock transmission assembly 321.

The interlocking transmission assembly 321 comprises an interlocking transmission rotating shaft 3212, the interlocking transmission rotating shaft 3212 is fixedly provided with an interlocking transmission input connecting lever 3211 and an interlocking transmission output connecting lever 3214, the interlocking transmission input connecting lever 3211 is rotatably connected with the first input connecting lever 3221, under the action of the first input connecting lever 3221, the interlocking transmission input connecting lever 3211 rotates along the counterclockwise direction (the arrow direction shown in fig. 12), and then the interlocking transmission output connecting lever 3214 is driven to rotate along the same direction, in the embodiment, the interlocking transmission assembly 321 is installed on the circuit breaker box 44, the interlocking transmission assembly 321 further comprises an interlocking transmission installation rack 3213 for installation and fixation, and the interlocking transmission rotating shaft 3212 is rotatably connected with the interlocking transmission installation rack 3213.

The interlocking output assembly 323 comprises an interlocking output pulling plate 3231 and an interlocking output sheet 3232, the interlocking output pulling plate 3231 is rotatably connected with an interlocking transmission output connecting lever 3214, an interlocking tension spring (not shown) is arranged between the interlocking output pulling plate 3231 and a second mechanism plate 3102, the interlocking output pulling plate 3231 rapidly returns after being stretched, the interlocking output pulling plate 3231 is fixedly connected with the interlocking output sheet 3232, the interlocking output sheet 3232 is slidably connected with the second mechanism plate 3102, two groups of interlocking output moving grooves 32322 distributed in the vertical direction are fixedly arranged on the interlocking output sheet 3232, the interlocking output moving grooves are horizontally and symmetrically distributed, an interlocking output moving rod 31021 corresponding to the interlocking output moving groove 32322 is fixedly arranged on the second mechanism plate 3102, the moving direction of the interlocking output sheet 3232 is guided through the two groups of interlocking output moving grooves 32322 and the interlocking output moving rod 31021, the interlocking output sheet 3232 is provided with two groups of limiting sheets 32321 distributed horizontally and symmetrically, the limiting piece 32321 is used for limiting the movement of the control device 312, when the vacuum circuit breaker 4 is in a closing state, the limiting piece 32321 and the control device 312 are in a limiting state, when the vacuum circuit breaker 4 is in an opening state, the interlocking output pulling plate 3231 moves downwards under the action of the interlocking transmission output connecting lever 3214, so that the interlocking output piece 3232 is driven to move downwards, the limiting piece 32321 moves to enable the control device 312 to be separated from the limited state, at the moment, the control device 312 can perform three-position operation, and safety is guaranteed.

In the present embodiment, the movement of the control device 312 is limited by the interlock device 32, specifically, the control device 312 further includes an interlock operation limiting assembly 3123, the interlock operation limiting assembly 3123 is composed of a first reset flap 31231 and a second reset flap 31232, the first reset flap 31231 is located above the second reset flap 31232 and is distributed in central symmetry, the first reset flap 31231 and the second reset flap 31232 are slidably connected to the second mechanism plate 3102, the first reset flap 31231 and the second reset flap 31232 have the same structure, and the structure of the first reset flap 31231 will be described below.

The second mechanism plate 3102 is fixedly provided with a sliding guide rod 31233, the first reset baffle 31231 is fixedly provided with a sliding guide groove 312313, and the sliding guide rod 31233 passes through the sliding guide grooves 312313 of the first reset baffle 31231 and the second reset baffle 31232 to realize sliding and left and right limiting directions.

The interlocking operation limiting assembly 3123 limits the selection device, specifically, a selection limiting cavity 3170 and a selection limiting plate 3177 are fixedly arranged on the selection plate 3171, a baffle protrusion 312311 is fixedly arranged above the first reset baffle 31231, baffle protrusions 312311 on the first reset baffle 31231 and the second reset baffle 31232 are distributed in the horizontal direction from left to right, the selection limiting plate 3177 is arranged between two sets of baffle protrusions 312311, the baffle protrusion 312311 of the second reset baffle 31232 is inserted into the selection limiting cavity 3170, so as to limit the selection plate 3171, only when the baffle protrusion 312311 moves, the selection plate 3171 can move from left to right, and three-station operation is performed.

The interlocking device 32 limits the interlocking operation limiting assembly 3123, specifically, a reset push plate 312312 is fixedly arranged on the lower side of the first reset baffle 31231, when the interlocking device 32 and the interlocking operation limiting assembly 3123 are in a limiting state, two groups of reset push plates 312312 are positioned between limiting pieces 32321, at this time, three-position operation cannot be performed through the operation selecting plate 3171, when the vacuum circuit breaker 4 is in a brake separating state, under the action of the interlocking device 32, the interlocking output piece 3232 moves downwards, so that the limiting pieces 32321 move downwards, the interlocking device 32 and the interlocking operation limiting assembly 3123 are separated from the limiting state, and at this time, the selecting plate 3171 can be moved to perform three-position operation.

The interlocking device can be independently applied to the existing inflatable cabinet.

The three-station mechanism 31 further includes an indicator plate 300, the indicator plate 300 is located outside the selector plate 3171 and fixedly connected to the second mechanism plate 3102, an indicator through hole 3001, a first indicator operation hole 3002 and a second indicator operation hole 3003 are fixedly disposed on the indicator plate 300, the first indicator operation hole 3002 and the second indicator operation hole 3003 are respectively opposite to the first operation port 315 and the second operation port 316, the shift lever 3172 penetrates through the indicator through hole 3001, and the indicator plate 300 is provided with a three-station operation indicator.

The vacuum circuit breaker 4 comprises a breaker pole 41, a breaker operating device and a dynamic sealing device 46, wherein the breaker pole 41 comprises a guide rod 411, the breaker operating device comprises a main shaft 42 and a power output mechanism 43, the dynamic sealing device 46 keeps the sealing state of the guide rod 411, the main shaft 42 is linked with the power output mechanism 43, the power output mechanism 43 is linked with the guide rod 411, and the opening and closing operation of the vacuum circuit breaker 4 is controlled.

In the present embodiment, only the main shaft 42 and the power output mechanism 43 of the circuit breaker operating device are listed, and the other components not shown are adopted by the conventional art.

The circuit breaker operating device is installed in the circuit breaker box 44, the circuit breaker box 44 is installed on the circuit breaker mounting plate 451, the circuit breaker pole 41 is installed on the pole mounting plate 452, the circuit breaker mounting plate 451 is installed on the partition plate of the operating mechanism chamber 13 through the sealing device, the pole mounting plate 452 is fixedly installed on the circuit breaker mounting plate 451, the movable sealing device 46 is fixedly connected with the circuit breaker mounting plate 451, the guide rod 411 penetrates through the movable sealing device 46 to be hermetically connected, penetrates through the circuit breaker mounting plate 451 and extends into the circuit breaker box 44.

The power output mechanism 43 is provided with three groups, the three groups of power output mechanisms 43 correspond to the breaker poles 41 one by one, the power output mechanism 43 comprises breaker hanging plates 433 fixedly arranged on a breaker box 44, the two groups of breaker hanging plates 433 are horizontally and symmetrically arranged, a breaker connecting plate 432 is arranged between the two groups of breaker hanging plates 433, the output end of the breaker connecting plate 432 is rotatably connected with the upper part of the breaker hanging plate 433, a surplus groove (not shown) is fixedly arranged at the middle end of the breaker connecting plate 432, a breaker pin 434 is arranged in the surplus groove, the breaker pin 434 is connected with a guide rod 411, a movable adjusting hole 4331 is fixedly arranged on the breaker hanging plate 433, the movable adjusting hole 4331 is horizontally distributed along the length direction, the breaker pin 434 is inserted into the movable adjusting hole 4331 and can slide along the movable adjusting hole 4331, a spring assembly is rotatably arranged at the input end of the breaker connecting plate 432, the spring assembly comprises a spring pressing plate 435 and a breaker pressing spring 431 sleeved on the spring pressing plate 435, the three groups of power output mechanisms 43 are connected with the main shaft 42 through the breaker connecting lever 430, the breaker connecting lever 430 is fixedly connected with the main shaft 42, the output end of the breaker connecting lever 430 is rotatably connected with the spring assembly, in the implementation process, when the brake is required to be opened, the main shaft 42 rotates clockwise (arrow direction shown in fig. 14), the spring assembly is driven to rotate along the same direction, the spring assembly drives the breaker connecting plate 432 to move, according to the visual angle shown in fig. 14, the breaker pin 434 drives the guide rod 411 to move outwards, the moving contact and the static contact in the breaker pole 41 are separated, the brake opening operation of the vacuum circuit breaker 4 is realized, and the reverse operation of the brake closing operation can be realized.

In this embodiment, the guide rod 411 is disposed outside the pole 41 of the circuit breaker, and the power output mechanism 43 is designed to be linked with the guide rod 411, so as to directly transmit the switching-on/off power of the operating device to the guide rod 411, thereby reducing many transmission links, reducing energy consumption, ensuring transmission efficiency to the maximum extent, and controlling the contact and separation of the moving contact and the static contact by the motion of the guide rod 411, so as to control the switching-on/off operation of the vacuum circuit breaker 4.

The power take-off 43 of the vacuum interrupter 4 can be applied separately to an existing gas-filled cabinet.

The dynamic sealing device 46 comprises a dynamic sealing shaft sleeve 461, a shaft sleeve cover plate 462 and a fine adjustment mechanism, wherein the dynamic sealing shaft sleeve 461 comprises a sealing assembly and a guide assembly, the sealing assembly is used for sealing a guide rod 411 of the vacuum circuit breaker 4, the guide assembly is used for guiding the guide rod 411, and the fine adjustment mechanism adjusts the position of the guide rod 411.

The shaft sleeve cover plate 462 is fixedly connected with a dynamic seal shaft sleeve 461, a penetrating cavity 4622 is fixedly arranged on the shaft sleeve cover plate 462, the dynamic seal shaft sleeve 461 is composed of a first shaft sleeve 4611 and a second shaft sleeve 4612, the first shaft sleeve 4611 and the second shaft sleeve 4612 are cylindrical structures, a first cavity 46111 is fixedly arranged in the first shaft sleeve 4611, a second cavity 46121 is fixedly arranged in the second shaft sleeve 4612, the penetrating cavity 4622, the first cavity 46111 and the second cavity 46121 are coaxially arranged, a mounting hole 4511 is fixedly arranged on the circuit breaker mounting plate 451, the size of the mounting hole 4511 is matched with that of the second shaft sleeve 4612, when the dynamic seal shaft sleeve 461 is mounted, the second shaft sleeve 4612 is inserted into the mounting hole 4511, the end face of the first shaft sleeve 4611 abuts against the circuit breaker mounting plate 451, and the circuit breaker mounting plate 451 is fixedly connected with the first shaft sleeve 4611 through a fastening screw 467, so that the dynamic seal device 46 is fixedly mounted on the circuit breaker mounting plate 451.

The sealing assembly includes a first sealing ring 463, a sealing sleeve 464, a first sealing member 4651 and a second sealing member 4652, the first sealing ring 463 is used for sealing the movable sealing device 46 and the breaker mounting plate 451, and the sealing sleeve 464, the first sealing member 4651 and the second sealing member 4652 are used for sealing the guide rod 411 which reciprocates.

In this embodiment, a seal chamber 46112 is fixedly disposed on an end surface of the first sleeve 4611, and the first seal ring 463 is installed in the seal chamber 46112.

The guide rod 411 sequentially penetrates through the through cavity 4622, the first cavity 46111 and the second cavity 46121 and extends into the breaker box 44, namely, the input end of the guide rod 411 is located in the breaker box 44, the output end of the guide rod 411 is located in the breaker pole 41, the sealing sleeve 464 is installed in the first cavity 46111, the sealing sleeve 464 is sleeved on the outer surface of the guide rod 411, the inner side of the sealing sleeve 464 is fixedly provided with an inward concave first cavity 4641, the first sealing element 4651 is installed in the first cavity 4641, the first sealing element 4651 is sleeved on the outer surface of the guide rod 411, the outer side of the sealing sleeve 464 is fixedly provided with an inward concave second cavity 4642, and the second sealing element 4652 is installed in the second cavity 4642; this embodiment ensures a real-time sealing state during the movement of the guide bar 411 by designing a double seal in the moving direction of the guide bar 411.

The guide assembly comprises a circuit breaker guide sleeve 466, the circuit breaker guide sleeve 466 is fixedly arranged in the second cavity 46121, the circuit breaker guide sleeve 466 is sleeved on the guide rod 411, and the circuit breaker guide sleeve 466 guides the movement of the guide rod 411 to prevent the guide rod 411 from deviating in the movement process.

Compared with the prior art, the dynamic sealing device 46 of the present embodiment has a simpler structure, high sealing efficiency, and reduced cost.

In order to prevent the central axis of the guide rod 411 and the central axis of the dynamic sealing device 46 from deviating after the guide rod 411 is used for a long time, and further affect the sealing and transmission efficiency, the dynamic sealing device 46 further comprises a fine adjustment mechanism which is adjusted through the fine adjustment mechanism to ensure the sealing and transmission efficiency, the fine adjustment mechanism comprises a cover plate installation hole 4621 fixedly arranged on the shaft sleeve cover plate 462 and a shaft sleeve installation hole 46113 fixedly arranged on the first shaft sleeve 4611, the cover plate installation hole 4621 and the shaft sleeve installation hole 46113 are in one-to-one correspondence, the cover plate installation hole 4621 is larger than the shaft sleeve installation hole 46113, the diameter of the penetrating cavity 4622 is larger than that of the guide rod 411, a gap exists between the cover plate installation hole 4621 and the shaft sleeve installation hole 46113, and the offset of the guide rod 411 is adjusted through the position of the penetrating cavity 4622, so that the guide rod 411 is ensured to keep the sealing state and the transmission efficiency after the guide rod 411 is used for a long time.

The dynamic seal 46 can be used alone in existing inflatable cabinets.

In other embodiments, the plurality of sets of sealing baffles 213 may be integrally formed.

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims

1. A vacuum interrupter for gas insulation, characterized by: the circuit breaker pole comprises a guide rod, the circuit breaker operating device comprises a main shaft and a power output mechanism, the dynamic sealing device controls the sealing state of the guide rod, the main shaft is linked with the power output mechanism, the power output mechanism is linked with the guide rod, and the opening and closing operation of the vacuum circuit breaker is controlled.

2. Vacuum interrupter for gas insulation according to claim 1, characterized in that: the circuit breaker operating device is installed at the circuit breaker box, and the circuit breaker box is installed at the circuit breaker mounting panel, and the circuit breaker utmost point post is installed at utmost point post mounting panel, and the circuit breaker mounting panel passes through sealing device to be installed at the cubical switchboard, and utmost point post mounting panel sets firmly on the circuit breaker mounting panel, and dynamic seal device sets firmly with the circuit breaker mounting panel and is connected.

3. A vacuum interrupter for gas insulation according to claim 2, characterized in that: power take off mechanism and circuit breaker utmost point post one-to-one, power take off mechanism includes the circuit breaker link plate, two sets of circuit breaker link plate horizontal symmetry sets up, be provided with circuit breaker even board between two sets of circuit breaker link plates, the output and the circuit breaker link plate top of circuit breaker even board are rotated and are connected, the middle-end that the circuit breaker even board sets firmly surplus groove, it is equipped with circuit breaker round pin spare to remain the inslot, circuit breaker round pin spare is connected with the guide arm, the removal regulation hole has set firmly on the circuit breaker link plate, circuit breaker round pin spare slides along removing the regulation hole, the input of circuit breaker even board rotates and is provided with spring assembly, power take off mechanism passes through the circuit breaker turning arm and is connected with the main shaft, the circuit breaker turning arm sets firmly with the main shaft and is connected, circuit breaker turning arm output is connected with spring assembly rotation.

4. Vacuum interrupter for gas insulation according to claim 1, characterized in that: the dynamic sealing device comprises a dynamic sealing shaft sleeve, a shaft sleeve cover plate and a fine adjustment mechanism, wherein the dynamic sealing shaft sleeve comprises a sealing assembly and a guide assembly, the sealing assembly is used for sealing the guide rod, the guide assembly is used for guiding the guide rod, and the fine adjustment mechanism adjusts the position of the guide rod.

5. Vacuum interrupter for gas insulation according to claim 4, characterized in that: the shaft sleeve cover plate is fixedly connected with the dynamic seal shaft sleeve, the shaft sleeve cover plate is fixedly provided with a through cavity, the dynamic seal shaft sleeve is composed of a first shaft sleeve and a second shaft sleeve, a first cavity is fixedly arranged in the first shaft sleeve, a second cavity is fixedly arranged in the second shaft sleeve, and the first cavity and the second cavity are coaxially arranged.

6. Vacuum interrupter for gas insulation according to claim 5, characterized in that: the circuit breaker mounting panel is last to set firmly the mounting hole, and the mounting hole is joined in marriage with the second shaft cover, and the mounting hole is inserted to the second shaft cover, and first axle sleeve terminal surface offsets with the circuit breaker mounting panel, and the circuit breaker mounting panel passes through fastening screw fixed connection with first axle sleeve.

7. Vacuum interrupter for gas insulation according to claim 4, characterized in that: the sealing assembly comprises a first sealing ring, a sealing sleeve, a first sealing piece and a second sealing piece, the first sealing ring is used for sealing between the dynamic sealing device and the circuit breaker mounting plate, the sealing sleeve, the first sealing piece and the second sealing piece are used for sealing a guide rod which does reciprocating motion, a sealing cavity is fixedly arranged on the end face of the first shaft sleeve, and the first sealing ring is arranged in the sealing cavity.

8. Vacuum interrupter for gas insulation according to claim 7, characterized in that: the guide rod runs through in proper order and runs through chamber, first cavity and second cavity, and the input of guide rod is located the circuit breaker box, and the output of guide rod is located the circuit breaker utmost point post, and the seal cover is installed in first cavity, and the seal cover is established at the guide rod surface, and the seal cover inboard has set firmly the first cavity of indent type, and first sealing member is installed at first cavity, and first sealing member cover is established at the guide rod surface, and the seal cover outside has set firmly the second cavity of indent type, and the second sealing member is installed at the second cavity.

9. Vacuum interrupter for gas insulation according to claim 5, characterized in that: the guide assembly comprises a circuit breaker guide sleeve, the circuit breaker guide sleeve is fixedly arranged in the second cavity, the circuit breaker guide sleeve is sleeved on the guide rod, and the circuit breaker guide sleeve guides the movement of the guide rod.

10. Vacuum interrupter for gas insulation according to claim 5, characterized in that: the fine adjustment mechanism comprises a cover plate mounting hole fixedly arranged on the cover plate of the shaft sleeve and a shaft sleeve mounting hole fixedly arranged on the first shaft sleeve, the cover plate mounting hole is larger than the shaft sleeve mounting hole, the diameter of the penetrating cavity is larger than that of the guide rod, a gap exists between the cover plate mounting hole and the guide rod, and the offset of the guide rod is adjusted by adjusting the position of the guide rod in the penetrating cavity.