A vacuum circuit breaker for gas insulation

Abstract

The application discloses a kind of vacuum circuit breaker for gas insulation, including circuit breaker pole, circuit breaker operating device and dynamic sealing device, circuit breaker pole includes guide rod, circuit breaker operating device includes main shaft and power output mechanism, dynamic sealing device controls the sealing state of guide rod, main shaft is linked with power output mechanism, power output mechanism is linked with guide rod, control the opening and closing operation of vacuum circuit breaker, the guide rod of the present application is arranged outside the circuit breaker pole of vacuum circuit breaker, and the power output mechanism is designed to be linked with the guide rod, the opening and closing power of operating device is directly transmitted to the guide rod, a lot of transmission links are reduced, energy consumption is reduced, transmission efficiency is guaranteed to the maximum, the movement of guide rod controls the contact and separation of moving contact and static contact, and then controls the opening and closing operation of vacuum circuit breaker.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of switch cabinets, and relates to a vacuum circuit breaker for gas insulation. BACKGROUND

[0002] The circuit breaker switch cabinet drives the main shaft through the circuit breaker operating mechanism, and the main shaft controls the contact and separation of the moving contact and the static contact through a complex transmission mechanism, the transmission path has large energy consumption and low transmission efficiency, in addition, the pole column and the operating device of the gas vacuum circuit breaker are installed in different chambers in the cabinet, higher sealing performance is required to ensure the safety of the operating personnel and the switch cabinet, the existing dynamic sealing device has a complex structure, is complicated to install, has high manufacturing cost, and needs to be replaced due to the shaft center offset of the circuit breaker after long-time use, and the application effectively solves the problem. SUMMARY

[0003] The application provides a vacuum circuit breaker for gas insulation.

[0004] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme: a vacuum circuit breaker for gas insulation, characterized by comprising a circuit breaker pole column, a circuit breaker operating device and a dynamic sealing device, the circuit breaker pole column 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.

[0005] Further, the circuit breaker operating device is installed on a circuit breaker box body, the circuit breaker box body is installed on a circuit breaker mounting plate, the circuit breaker pole column is installed on a pole column mounting plate, the circuit breaker mounting plate is installed on a switch cabinet through a sealing device, the pole column mounting plate is fixedly arranged on the circuit breaker mounting plate, and the dynamic sealing device is fixedly connected with the circuit breaker mounting plate.

[0006] Further, the power output mechanism corresponds to the circuit breaker pole column in a one-to-one manner, the power output mechanism comprises a circuit breaker hanging plate, two groups of circuit breaker hanging plates are horizontally symmetrically arranged, a circuit breaker connecting plate is arranged between the two groups of circuit breaker hanging plates, an output end of the circuit breaker connecting plate is rotatably connected above the circuit breaker hanging plate, a remaining groove is fixedly arranged at a middle end of the circuit breaker connecting plate, a circuit breaker pin is arranged in the remaining groove, the circuit breaker pin is connected with the guide rod, a moving adjustment hole is fixedly arranged on the circuit breaker hanging plate, the circuit breaker pin slides along the moving adjustment hole, a spring assembly is rotatably arranged at an input end of the circuit breaker connecting plate, the power output mechanism is connected with the main shaft through a circuit breaker crank arm, the circuit breaker crank arm is fixedly connected with the main shaft, and an output end of the circuit breaker crank arm is rotatably connected with the spring assembly.

[0007] Further, the dynamic sealing device comprises a dynamic sealing bushing, a bushing cover plate and a fine adjustment mechanism, the dynamic sealing bushing comprises a sealing assembly and a guiding assembly, the sealing assembly is used for sealing the guide rod, and the guiding assembly is used for guiding the guide rod, and the fine adjustment mechanism adjusts the position of the guide rod.

[0008] Further, the bushing cover plate is fixedly connected with the dynamic sealing bushing, the bushing cover plate is fixedly provided with a through cavity, the dynamic sealing bushing is composed of a first bushing and a second bushing, the first bushing is fixedly provided with a first cavity, the second bushing is fixedly provided with a second cavity, and the first cavity and the second cavity are coaxially arranged.

[0009] Further, the circuit breaker mounting plate is fixedly provided with a mounting hole, the mounting hole is matched with the second bushing, the second bushing is inserted into the mounting hole, the end face of the first bushing is abutted with the circuit breaker mounting plate, and the circuit breaker mounting plate is fixedly connected with the first bushing through a fastening screw.

[0010] Further, 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 the guide rod which moves reciprocally, the end face of the first bushing is fixedly provided with a sealing cavity, and the first sealing ring is arranged in the sealing cavity.

[0011] Further, the guide rod sequentially penetrates through the through cavity, the first cavity and the second cavity, the input end of the guide rod is located in the circuit breaker box body, the output end of the guide rod is located in the circuit breaker pole, the sealing sleeve is arranged in the first cavity, the sealing sleeve is arranged on the outer surface of the guide rod, the inner side of the sealing sleeve is fixedly provided with a first concave cavity, the first sealing piece is arranged in the first cavity, the first sealing piece is arranged on the outer surface of the guide rod, the outer side of the sealing sleeve is fixedly provided with a second concave cavity, and the second sealing piece is arranged in the second cavity.

[0012] Further, the guiding assembly comprises a circuit breaker guiding sleeve, the circuit breaker guiding sleeve is fixedly arranged in the second cavity, the circuit breaker guiding sleeve is arranged on the guide rod, and the circuit breaker guiding sleeve guides the movement of the guide rod.

[0013] Further, the fine adjustment mechanism comprises a cover plate mounting hole fixedly arranged on the bushing cover plate and a bushing mounting hole fixedly arranged on the first bushing, the cover plate mounting hole is larger than the bushing mounting hole, the diameter of the through cavity is larger than the diameter of the guide rod, and a gap exists between the through cavity and the guide rod, the offset amount of the guide rod is adjusted by adjusting the position of the guide rod in the through cavity.

[0014] In summary, the present application has the following advantages:

[0015] 1. The vacuum circuit breaker of the present application sets the guide rod outside the pole of the circuit breaker, and designs the power output mechanism to be linked with the guide rod, so as to directly transmit the closing and opening power of the operating device to the guide rod, thereby reducing many transmission links, reducing energy consumption, and ensuring the transmission efficiency to the maximum, the movement of the guide rod controls the contact and separation of the moving contact and the static contact, and further controls the closing and opening operation of the vacuum circuit breaker.

[0016] 2. The vacuum circuit breaker of the present application optimizes the structure of the dynamic sealing device to keep the guide rod in a sealed state during linear reciprocating movement, and the structure is simpler, the first sealing ring is used to seal the dynamic sealing device and the circuit breaker mounting plate, the sealing sleeve, the first sealing element and the second sealing element are used to seal the guide rod reciprocating, and the double sealing in the moving direction of the guide rod is designed to ensure that the guide rod is in a real-time sealing state during movement.

[0017] 3. The vacuum circuit breaker of the present application designs the circuit breaker guide sleeve to guide the movement of the guide rod, so as to prevent the guide rod from deviating during movement.

[0018] 4. The vacuum circuit breaker of the present application adjusts the position of the guide rod through the fine adjustment mechanism, adjusts the deviation of the guide rod, and ensures that the guide rod keeps the sealing state and transmission efficiency after long time use. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is an internal device distribution diagram of the switch cabinet of the present application.

[0020] Figure 2 It is a sealing device and air tank maintenance plate installation diagram of the present application.

[0021] Figure 3 It is Figure 2 the sectional view of A-A.

[0022] Figure 4 It is an exploded view of the sealing device of the present application.

[0023] Figure 5 It is Figure 3 the enlarged view of B.

[0024] Figure 6 It is a schematic view of the operating device of the present application.

[0025] Figure 7 It is a three-station mechanism diagram without an indicator plate of the present application.

[0026] Figure 8 It is an installation diagram of the transmission assembly of the present application.

[0027] Figure 9 It is a selection plate diagram of the present application.

[0028] Figure 10 schematic diagram of an auxiliary device of the present application Figure 1 .

[0029] Figure 11 schematic diagram of an auxiliary device of the present application Figure 2 .

[0030] Figure 12 schematic diagram of an interlocking device of the present application.

[0031] Figure 13 schematic diagram of a first reset baffle of the present application.

[0032] Figure 14 schematic diagram of a vacuum circuit breaker of the present application.

[0033] Figure 15 schematic diagram of a circuit breaker operating device of the present application.

[0034] Figure 16 schematic diagram of a dynamic sealing device of the present application.

[0035] Figure 17 schematic diagram of a dynamic sealing device of the present application.

[0036] Figure 18 schematic diagram of a dynamic sealing device of the present application. Figure 16 schematic diagram of a dynamic sealing device of the present application.

[0037] Figure 19 schematic diagram of a dynamic sealing device of the present application. Figure 18 schematic diagram of a dynamic sealing device of the present application. DETAILED DESCRIPTION

[0038] The present application is herein described, by way of example only, with reference to the accompanying drawings, wherein:

[0039] It is to be understood that the above-mentioned embodiments and the features thereof can be combined with each other and / or replaced by other technical characteristics. It is especially understood that the protection scope of the present application is not limited by the specific embodiments given herein.

[0040] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, lateral, longitudinal, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0041] Example 1:

[0042] like Figures 1-19 As shown, a gas-insulated vacuum circuit breaker is installed in a gas-insulated switch cabinet. The switch cabinet includes a cabinet 1, a gas box 2, an operating device 3, and a vacuum circuit breaker 4 inside the cabinet 1. The gas box 2 is equipped with a sealing device 21 for sealing. The operating device 3 includes a three-position mechanism 31 and an interlocking device 32 for preventing the three-position switch from being operated while energized. The vacuum circuit breaker 4 includes a circuit breaker pole 41 and a circuit breaker operating device, which are sealed together by a dynamic sealing device 46.

[0043] The gas box 2 uses an insulating gas medium, preferably sulfur hexafluoride gas. In this embodiment, the gas box is equipped with a main busbar gas filling compartment 22 and a circuit breaker gas filling compartment 23. The cabinet 1 is equipped with a small busbar compartment 11, an instrument compartment 12, an operating mechanism compartment 13, and a cable compartment 14. The main circuit of the three-position switch is installed in the main busbar gas filling compartment 22. The operating device 3 of the three-position switch is installed outside the main busbar gas filling compartment 22, that is, inside the operating mechanism compartment 13. The main busbar gas filling compartment 22 is equipped with sealing elements at the installation positions of the main circuit of the three-position switch and the operating device 3 to achieve a sealed connection between the inside and outside of the compartment, so as to realize the functions of operation, isolation, and grounding of the three-position switch and interlocking of each function.

[0044] The circuit breaker pole 41 is installed in the circuit breaker inflation compartment 23, and the circuit breaker operating device is installed outside the circuit breaker inflation compartment 23, that is, inside the operating mechanism compartment 13. The dynamic sealing device 46 is installed in the circuit breaker inflation compartment 23 and is located at the installation position of the circuit breaker pole 41 and the circuit breaker operating device. The dynamic sealing connection is achieved through the dynamic sealing device 46.

[0045] The switchgear is equipped with a front upper door 121 for the instrument room 12, a front lower door 131 for the operating mechanism room 13, and a rear upper cover plate 151, a rear middle cover plate 152, and a rear lower door 153. The front upper door 121 is equipped with a circuit breaker button, indicator light, microcomputer protection device, ammeter, voltmeter, etc. The front lower door 131 is equipped with an observation window for observing a gas density meter, a three-position switch, and a circuit breaker indicator. The front lower door 131 is also equipped with an emergency circuit breaker trip button. An interlocking mechanism is provided between the operating mechanism and the front lower door to ensure safety. The rear upper cover plate 151, the rear middle cover plate 152, and the rear lower door 153 are interlocked. The rear lower door 153 is equipped with an observation window, a lighting lamp, and an electrical interlock.

[0046] In this embodiment, the cable chamber 14 is provided with a separate pressure release channel, and the front of the busbar chamber 11 is provided with a brow, which can be provided with a company logo and the purpose of the switch cabinet. The busbar chamber 11 is used to lay the busbar, which provides the power required for the control loop or auxiliary loop of the switch cabinet, and is connected to the adjacent cabinet through the terminal. The instrument chamber 12 is installed with relay protection elements, instruments, live monitoring indicators and various secondary equipment. The cable chamber 14 is used for the support of the gas tank 2, the installation and protection of the cable, and the main busbar inflation compartment 22 and the circuit breaker inflation compartment 23 are connected through a separate sealing device.

[0047] The sealing device 21 includes a sealing cover plate 211, a sealing ring 212, a sealing partition plate 213, and a sealing gasket 214. The sealing partition plate 213 and the sealing gasket 214 are fixedly provided on the sealing cover plate 211. The sealing partition plate 213 and the sealing gasket 214 form a sealing cavity 216 for installing the sealing ring 212. The sealing ring 212 and the sealing gasket 214 are double-sealed.

[0048] The sealing cover plate 211 is fixedly provided with a cover plate perforation 2111, and the sealing cover plate 211 is provided in a square structure.

[0049] The sealing partition plate 213 is provided in several groups, preferably four groups. The four groups of sealing partition plates 213 form a limiting assembly for limiting the sealing ring 212. The four groups of sealing partition plates 213 are connected end to end to form a square ring structure. The limiting assembly is installed on the sealing cover plate 211 and is installed in the axial direction of the cover plate perforation 2111.

[0050] In this embodiment, the sealing gasket 214 is provided in a square ring structure, and the sealing gasket 214 is installed on the sealing cover plate 211 and is installed on the same side of the limiting assembly installed on the sealing cover plate 211. The limiting assembly is located in the inner ring of the sealing gasket 214, as shown in Figure 5 The limiting assembly and the sealing gasket 214 form a sealing cavity 216, which is a square ring structure. The sealing ring 212 is installed in the sealing cavity 216, i.e., the sealing ring 212 is located between the limiting assembly and the sealing gasket 214. The double-sealing function is achieved through the sealing ring 212 and the sealing gasket 214, so that the gas tank 2 becomes a closed container, ensuring the safety of the operating personnel and the switch cabinet.

[0051] As shown in Figure 2As shown, the sealing device 21 is installed on the gas tank 2. For the convenience of describing the embodiment, the side plate of the gas tank 2 on which the sealing device 21 is installed is referred to as a gas tank maintenance plate 20. Specifically, a plurality of cover plate fixing holes 2112 are arranged in a rectangular shape on the sealing cover plate 211, a sealing gasket fixing hole 2141 is arranged on the sealing gasket 214, the gas tank maintenance plate 20 is fixedly provided with a stud 215, the stud 215 corresponds to the sealing gasket fixing hole 2141 and the cover plate fixing hole 2112 one by one, the stud 215 penetrates the sealing gasket fixing hole 2141 and the cover plate fixing hole 2112 in sequence, and plays a positioning role. The sealing device 21 is fixedly connected in the existing manner, such as welding, screwing, etc., which will not be described further herein.

[0052] The gas tank maintenance plate 20 is provided with a component installation inlet and outlet (not shown in the figure), and each component is installed in the gas tank 2 in sequence through the installation inlet and outlet. After installation is completed, the sealing device 21 is installed on the gas tank maintenance plate 20 to close the installation inlet and outlet, and the double sealing design of the sealing device 21 ensures the sealing performance of the gas tank 2.

[0053] The sealing device 21 can be used alone in the existing gas tank.

[0054] The operating device 3 includes a three-position mechanism 31, an auxiliary device 313, and an interlocking device 32. The three-position mechanism 31 includes an electric operating assembly, a manual operating assembly, and a transmission mechanism. The electric operating assembly or the manual operating assembly controls the state of the three-position switch through the transmission mechanism. The auxiliary device 313 outputs an electrical signal of the position of the three-position mechanism. The interlocking device 32 is used to prevent live operation of the three-position switch.

[0055] The three-position mechanism 31 includes a rack 310 and a control device 312. The control device 312 includes an electric operating assembly, a manual operating assembly, and a transmission mechanism. The electric operating assembly or the manual operating assembly controls the state of the three-position switch through the control transmission assembly.

[0056] The three-position mechanism can be used alone in the existing gas tank.

[0057] The rack 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 through a rack support 3103. The first mechanism plate 3101 and the second mechanism plate 3102 form a first installation cavity. In the embodiment, the first mechanism plate 3101 and the second mechanism plate 3102 are arranged in parallel.

[0058] The electrically-operated assembly comprises a three-position motor 3121 installed in the first installation cavity and fixedly connected with the second mechanism plate 3102, and the output shaft of the three-position motor 3121 penetrates the second mechanism plate 3102 and is rotatably connected with the transmission mechanism, as shown in the figure. Figure 8 The output shaft located outside the second mechanism plate 3102 is connected with the transmission mechanism to transmit power and realize the opening and closing operation of the three-position switch.

[0059] 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, both of which are rotatably connected with the first mechanism plate 3101 and the second mechanism plate 3102. The input end of the transmission shaft 3145 penetrates the second mechanism plate 3102 and the first mechanism plate 3101, respectively. The input end of the transmission screw rod 3146 penetrates the second mechanism plate 3102, and 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 the main circuit 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 circuit of the three-position switch to realize the opening and closing operation of the three-position switch.

[0060] The transmission assembly is located outside the second mechanism plate 3102 and comprises a transmission gear 3141, a transition gear 3142, an operation gear 3143 and a driving gear 3144. The transmission gear 3141, the transition gear 3142, the operation gear 3143 and the driving gear 3144 are distributed along the transverse direction and are connected in pairs in sequence. The transmission gear 3141 is fixedly arranged on the output shaft of the 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 the input end of the transmission shaft 3145. The operation gear 3143 drives the transmission shaft 3145 to rotate to realize the power input of the transmission shaft 3145. The driving gear 3144 is fixedly connected with the transmission screw rod 3146. The driving gear 3144 drives the transmission screw rod 3146 to rotate to realize the power input of the transmission screw rod 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 operation gear 3143 to rotate. The operation gear 3143 drives the driving gear 3144 to rotate, so that the transmission shaft 3145 transmits power to the main circuit of the three-position switch to realize the opening and closing operation of the three-position switch.

[0061] In this embodiment, the three-position switch integrates manual operation and electric operation. The manually-operated assembly comprises a first operation port 315 and a second operation port 316, as shown inFigure 8 As shown, the first operation port 315 is fixedly arranged at the input end of the transmission screw 3146 or is in an integral structure with the transmission screw 3146, and the second operation port 316 is fixedly arranged at the input end of the transmission shaft 3145 or is in an integral structure with the transmission shaft 3145, so as to directly drive the transmission shaft 3145 or the transmission screw 3146 to rotate by means of manual operation, thereby realizing the opening and closing of the three-position switch and the grounding operation.

[0062] In this embodiment, the transmission shaft 3145 and the transmission screw 3146 are used for linear transmission, thereby improving the efficiency of motion transmission.

[0063] The manual operation mode and the electric operation mode of the three-position switch are selected for operation, that is, the electric operation cannot be performed when the manual operation is performed, and the manual operation cannot be performed when the electric operation is performed. In order to achieve this purpose, the three-position mechanism 31 includes a selection device. The selection device includes a selection plate 3171. The selection plate 3171 is located outside the second mechanism plate 3102 and is in sliding connection with the second mechanism plate 3102. Specifically, the second mechanism plate 3102 is in sliding connection with a waist-shaped hole (not marked in the figure), and the selection plate 3171 is fixedly arranged with a baffle guide rod 3173 and a leaf spring lever 3174 in sliding connection with the waist-shaped hole, thereby limiting the sliding direction of the selection plate 3171. The selection plate 3171 is further provided with a first operation hole 3174 and a second operation hole 3175. The first operation hole 3174 and the second operation hole 3175 are in the same horizontal plane as the first operation port 315 and the second operation port 316. The center distance of the first operation hole 3174 and the second operation hole 3175 is greater than the center distance of 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 arranged with a lever 3172. The manual movement of the lever 3172 drives the selection plate 3171 to move rightward, so that the first operation hole 3174 is opposite to the first operation port 315. At this time, the transmission screw 3146 is manually operated, or the selection plate 3171 is driven to move leftward, so that the second operation hole 3175 is opposite to the second operation port 316. At this time, the transmission shaft 3145 is manually operated.

[0064] The linkage device is arranged between the control device 312 and the auxiliary device 313. The linkage device transmits the motion of the control device 312 to the auxiliary device 313, thereby realizing the linkage of the auxiliary device 313, and outputting the electrical signal of the position of the three-position mechanism.

[0065] The linkage device comprises a sliding block 3121, which is in sliding connection with a transmission shaft 3145, in threaded connection with a transmission screw 3146, and in rotation with the transmission screw 3146 to drive the sliding block 3121 to slide along the transmission shaft 3145. The sliding block 3121 is fixed with a push rod 3122, which moves with the sliding block 3121 and transmits power to the auxiliary device 313 when moving.

[0066] The auxiliary device 313 comprises an auxiliary rack 3131, an auxiliary switch 3132, and a conversion linkage device 3135. The auxiliary switch 3132 is installed on the auxiliary rack 3131, and the conversion linkage device 3135 is in linkage with the transmission assembly of the three-station mechanism. The auxiliary switch 3132 outputs an electrical signal of the position of the three-station mechanism, and a spring assembly is used for switching and restoring the position of the auxiliary switch 3132.

[0067] The auxiliary rack 3131 comprises a first auxiliary mechanism plate 31311 and a second auxiliary mechanism plate 31312. The auxiliary switch 3132 is provided with two groups and is symmetrically installed between the first auxiliary mechanism plate 31311 and the second auxiliary mechanism plate 31312. Generally, the first auxiliary mechanism plate 31311 and the second auxiliary mechanism plate 31312 are arranged in parallel, and the auxiliary output shaft 31321 of the auxiliary switch 3132 penetrates the first auxiliary mechanism plate 31311 and the second auxiliary mechanism plate 31312 in rotation.

[0068] The conversion linkage device 3135 is provided with two groups and is in one-to-one correspondence with the auxiliary switch 3132. The conversion linkage device 3135 comprises 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 connected in rotation. The first linkage 31351 and the fourth linkage 31354 are in rotation with the first auxiliary mechanism plate 31311, and the first linkage 31351 and the fourth linkage 31354 are fixed with a push block 3137. The push rod 3122 interferes with the push block 3137, that is, the push rod 3122 drives the push block 3137 to rotate, and then drives the first linkage 31351 and the fourth linkage 31354 to rotate. The second linkage 31352 and the third linkage 31353 are in rotation with the auxiliary output shaft 31321 through a conversion plate 31355, and the transmission of the second linkage 31352 and the third linkage 31353 is limited.

[0069] The first auxiliary mechanism plate 31311 is fixed with a plurality of micro switches 31351. One group of micro switches 31351 is located below the first connecting rod 31351, and the other group is located below the fourth connecting rod 31354. The micro switch 31351 is used for signal receiving. Specifically, when the push rod 3122 drives the push block 3137 to rotate, the first connecting rod 31351 is rotated, the first connecting rod 31351 contacts the micro switch 31351, the micro switch 31351 receives the signal, and the signal is transmitted to the auxiliary switch 31351. At this time, the auxiliary switch 31351 outputs the 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 connecting rod 31354 is rotated, the first connecting rod 31351 contacts the micro switch 31351, the micro switch 31351 receives the signal, and the signal is transmitted to the auxiliary switch 31351. At this time, the auxiliary switch 31351 outputs the signal that the three-position mechanism is located at the isolation position. The linkage device continues to operate, so that the push rod 3122 drives the push block 3137 of another group of conversion connecting rod devices 3135 to rotate, so that the first connecting rod 31351 of another group contacts the corresponding micro switch 31351. At this time, the auxiliary switch 31351 outputs the signal that the three-position mechanism is located at the closed position. The linkage mode of the three-position mechanism operating device in the embodiment realizes the setting of a plurality of micro switches 31351 to receive electrical signals when the three-position mechanism is located at different positions in one operation cycle, and avoids the problem that the linkage device moves beyond the limited position.

[0070] The auxiliary device can be used alone in the existing gas-filled cabinet.

[0071] 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 groups and is horizontally symmetrically arranged. One group of auxiliary switch limiting plates 3133 corresponds to one group of micro switches 31351. The two groups of auxiliary switch limiting plates 3133 are connected by two groups of auxiliary switch tension springs 3134. The auxiliary switch limiting plate 3133 is provided with a long rod, which is located in the auxiliary switch tension spring 3134, so that the auxiliary switch tension spring 3134 remains in a specific direction during stretching or recovery.

[0072] The auxiliary switch limiting plate 3133 is in sliding connection with the second auxiliary mechanism plate 31312, the second auxiliary mechanism plate 31312 is fixedly provided with an auxiliary switch limiting rod 31312, the auxiliary switch limiting plate 3133 is fixedly provided with a corresponding auxiliary switch limiting groove 31331, the auxiliary switch limiting rod 31312 is located in the auxiliary switch limiting groove 31331, the movement direction of the auxiliary switch limiting plate 3133 is limited, the auxiliary output shaft 31321 penetrating through the second auxiliary mechanism plate 31312 is fixedly provided with an auxiliary switch crank arm 31322, the auxiliary switch crank arm 31322 is fixedly provided with an auxiliary switch push rod 31323, the auxiliary switch limiting plate 3133 is provided with a driving groove 31332, the auxiliary switch push rod 31323 is located in the driving groove 31332, in the implementation process, under the action of the linkage device, the auxiliary output shaft 31321 is driven to rotate when the conversion linkage device 3135 is driven, the auxiliary output shaft 31321 is driven to rotate when the auxiliary switch push rod 31323 is driven to rotate, 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 stretched position, after the linkage device moves and the force applied to the conversion linkage device 3135 disappears, the auxiliary switch tension spring 3134 returns, the auxiliary output shaft 31321 reversely rotates and returns to the initial position, and the quick switching function of the auxiliary switch is realized through the auxiliary switch tension spring 3134 in the embodiment.

[0073] The interlocking device 32 comprises an interlocking transmission assembly 321, an interlocking input assembly 322 and an interlocking output assembly 323. The closing and opening 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.

[0074] The interlocking input assembly 322 comprises a first input crank arm 3221 and a second input crank arm 3222. The second input crank arm 3222 is fixedly connected with the main shaft 42 of the vacuum circuit breaker 4, and the first input crank arm 3221 is rotationally connected with the output end of the second input crank arm 3222. In the embodiment, when the vacuum circuit breaker 4 is opened, the output shaft thereof rotates clockwise (as shown by the arrow direction), and at this time, the second input crank arm 3222 is driven to move upward, thereby transmitting the action input by the vacuum circuit breaker 4 to the interlocking transmission assembly 321. Figure 12

[0075] The interlocking transmission assembly 321 comprises an interlocking transmission rotating shaft 3212, which is fixedly provided with an interlocking transmission input crank arm 3211 and an interlocking transmission output crank arm 3214. The interlocking transmission input crank arm 3211 is rotationally connected with the first input crank arm 3221, and under the action of the first input crank arm 3221, the interlocking transmission input crank arm 3211 rotates in the counterclockwise direction (as shown by the arrow direction). Figure 12 ​The rotation of the control device 312 drives the interlocking transmission output crank arm 3214 to rotate in the same direction, and in this embodiment, the interlocking transmission assembly 321 is installed on the circuit breaker box 44. The interlocking transmission assembly 321 further includes an interlocking transmission mounting bracket 3213 for fixed installation. The interlocking transmission rotating shaft 3212 is rotationally connected to the interlocking transmission mounting bracket 3213.

[0076] The interlocking output assembly 323 includes an interlocking output pull plate 3231 and an interlocking output piece 3232. The interlocking output pull plate 3231 is rotationally connected to the interlocking transmission output crank arm 3214. The interlocking output pull plate 3231 is provided with an interlocking pull spring (not shown) between the interlocking output pull plate 3231 and the second mechanism plate 3102. The interlocking output pull plate 3231 quickly returns after being stretched. The interlocking output pull plate 3231 and the interlocking output piece 3232 are fixedly connected. The interlocking output piece 3232 is slidingly connected to the second mechanism plate 3102. The interlocking output piece 3232 is fixedly provided with interlocking output moving grooves 32322 distributed in the vertical direction. There are two groups of interlocking output moving grooves 32322, which are horizontally symmetrically distributed. The second mechanism plate 3102 is fixedly provided with interlocking output moving rods 31021 corresponding to the interlocking output moving grooves 32322. The movement direction of the interlocking output piece 3232 is guided by the two groups of interlocking output moving grooves 32322 and the interlocking output moving rods 31021. The interlocking output piece 3232 is provided with two groups of horizontally symmetrically distributed limiting pieces 32321, which are used to limit the movement of the control device 312. When the vacuum circuit breaker 4 is in the closed state, the limiting pieces 32321 and the control device 312 are in a limiting state. When the vacuum circuit breaker 4 is in the open state, the interlocking transmission output crank arm 3214 drives the interlocking output pull plate 3231 to move downward, thereby driving the interlocking output piece 3232 to move downward. The movement of the limiting pieces 32321 makes the control device 312 out of the limiting state. At this time, the control device 312 can perform three-position operation, which ensures safety. The above structure can prevent live operation of the three-position switch, that is, through the interlocking device, the three-position mechanism cannot be operated when the vacuum circuit breaker 4 is in the closed position. Only when the vacuum circuit breaker 4 is in the open position, the three-position mechanism can be operated.

[0077] In this embodiment, the movement limitation of the control device 312 by the interlocking device 32 is achieved by limiting the selection device. Specifically, the control device 312 further includes an interlocking operation limiting assembly 3123, which is composed of a first reset baffle 31231 and a second reset baffle 31232. The first reset baffle 31231 is located above the second reset baffle 31232 and is centrally symmetrically distributed. The first reset baffle 31231 and the second reset baffle 31232 are slidingly connected to the second mechanism plate 3102. The first reset baffle 31231 and the second reset baffle 31232 are the same in structure, and the structure of the first reset baffle 31231 is described below.

[0078] The second mechanism plate 3102 is fixed with a sliding guide rod 31233, and the first reset baffle 31231 is fixed with a sliding guide groove 312313. The sliding guide rod 31233 passes through the sliding guide groove 312313 of the first reset baffle 31231 and the second reset baffle 31232 to realize sliding and limit the left and right directions.

[0079] The interlocking operation limiting assembly 3123 limits the selection device. Specifically, the selection plate 3171 is fixed with a selection limiting cavity 3170 and a selection limiting plate 3177, and the first reset baffle 31231 is fixed with a baffle protrusion 312311 above the first reset baffle 31231. The baffle protrusions 312311 on the first reset baffle 31231 and the second reset baffle 31232 are distributed left and right in the horizontal direction. The selection limiting plate 3177 is arranged between the two groups of baffle protrusions 312311. The baffle protrusion 312311 of the second reset baffle 31232 is inserted into the selection limiting cavity 3170, thereby limiting the selection plate 3171. Only when the baffle protrusion 312311 moves, the selection plate 3171 can move left and right to perform three-position operation.

[0080] The interlocking device 32 limits the interlocking operation limiting assembly 3123. Specifically, the first reset baffle 31231 is fixed with a reset push plate 312312 below. When the interlocking device 32 and the interlocking operation limiting assembly 3123 are in a limiting state, the two reset push plates 312312 are located between the limiting pieces 32321. At this time, three-position operation cannot be performed by operating the selection plate 3171. When the vacuum circuit breaker 4 is in the open state, the interlocking device 32 acts on the interlocking output piece 3232 to move downward, so that the limiting piece 32321 moves downward. The interlocking device 32 and the interlocking operation limiting assembly 3123 are out of the limiting state. At this time, the selection plate 3171 can be moved to perform three-position operation.

[0081] The interlocking device can be used in the existing gas-filled cabinet.

[0082] The three-position mechanism 31 further includes an indication plate 300. The indication plate 300 is located outside the selection plate 3171 and is fixedly connected with the second mechanism plate 3102. The indication plate 300 is fixedly provided with an indication perforation 3001, a first indication operation hole 3002, and a second indication operation hole 3003. The first indication operation hole 3002 and the second indication operation hole 3003 are respectively opposite to the first operation port 315 and the second operation port 316. The toggle lever 3172 penetrates the indication perforation 3001. The indication plate 300 is provided with a three-position operation indication mark.

[0083] The vacuum circuit breaker 4 comprises a circuit breaker pole 41, a circuit breaker operating device and a dynamic sealing device 46, the circuit breaker pole 41 comprises a guide rod 411, the circuit 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 connected with the power output mechanism 43, the power output mechanism 43 is connected with the guide rod 411, and the opening and closing operations of the vacuum circuit breaker 4 are controlled.

[0084] In the embodiment, only the main shaft 42 and the power output mechanism 43 of the circuit breaker operating device are listed, and the remaining parts not shown are adopted by the existing technology.

[0085] The circuit breaker operating device is installed in a circuit breaker box 44, the circuit breaker box 44 is installed on a circuit breaker mounting plate 451, the circuit breaker pole 41 is installed on a 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 arranged on the circuit breaker mounting plate 451, the dynamic sealing device 46 is fixedly connected with the circuit breaker mounting plate 451, the guide rod 411 penetrates through the dynamic sealing device 46 and is sealingly connected, and the guide rod 411 penetrates through the circuit breaker mounting plate 451 and extends into the circuit breaker box 44.

[0086] The power output mechanism 43 is provided with three groups, the three groups of power output mechanisms 43 correspond to the circuit breaker poles 41 one by one, the power output mechanism 43 comprises a circuit breaker hanging plate 433 fixedly arranged on the circuit breaker box 44, two groups of circuit breaker hanging plates 433 are horizontally symmetrically arranged, a circuit breaker connecting plate 432 is arranged between the two groups of circuit breaker hanging plates 433, an output end of the circuit breaker connecting plate 432 is rotationally connected above the circuit breaker hanging plate 433, a middle end of the circuit breaker connecting plate 432 is fixedly arranged in a remaining groove (not shown in the figure), the remaining groove is provided with a circuit breaker pin 434, the circuit breaker pin 434 is connected with the guide rod 411, the circuit breaker hanging plate 433 is fixedly provided with a moving adjustment hole 4331, the length direction of the moving adjustment hole 4331 is horizontally distributed, the circuit breaker pin 434 is inserted into the moving adjustment hole 4331 and can slide along the moving adjustment hole 4331, an input end of the circuit breaker connecting plate 432 is rotationally provided with a spring assembly, the spring assembly comprises a spring pressing plate 435 and a circuit breaker compression 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 a circuit breaker crank arm 430, the circuit breaker crank arm 430 is fixedly connected with the main shaft 42, and an output end of the circuit breaker crank arm 430 is rotationally connected with the spring assembly. Figure 14 In the implementation process, when the circuit breaker needs to be opened, the main shaft 42 is rotated clockwise (the direction of the arrow shown), drives the spring assembly to rotate in the same direction, at this time, the spring assembly drives the circuit breaker connecting plate 432 to move, according to the visual angle of Figure 14 , the circuit breaker pin 434 drives the guide rod 411 to move outward, the moving of the guide rod 411 drives the dynamic contact and the static contact in the circuit breaker pole 41 to separate, and the opening operation of the vacuum circuit breaker 4 is realized, and the closing operation is reversely operated.

[0087] In the embodiment, the guide rod 411 is arranged outside the circuit breaker pole 41, and the power output mechanism 43 is designed to be linked with the guide rod 411, so that the closing and opening power of the operating device is directly transmitted to the guide rod 411, thereby reducing a lot of transmission links, reducing energy consumption, and maximizing the transmission efficiency. The movement of the guide rod 411 controls the contact and separation of the moving contact and the static contact, thereby controlling the closing and opening operation of the vacuum circuit breaker 4.

[0088] The power output mechanism 43 of the vacuum circuit breaker 4 can be applied to the existing gas-filled cabinet.

[0089] The dynamic sealing device 46 includes a dynamic sealing shaft sleeve 461, a shaft sleeve cover plate 462, and a fine adjustment mechanism. The dynamic sealing shaft sleeve 461 includes a sealing assembly and a guide assembly. The sealing assembly is used for sealing the guide rod 411 of the vacuum circuit breaker 4, and the guide assembly is used for guiding the guide rod 411. The fine adjustment mechanism adjusts the position of the guide rod 411.

[0090] The shaft sleeve cover plate 462 is fixedly connected with the dynamic sealing shaft sleeve 461. The shaft sleeve cover plate 462 is fixedly provided with a through cavity 4622. The dynamic sealing 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. The first shaft sleeve 4611 is fixedly provided with a first cavity 46111 inside. The second shaft sleeve 4612 is fixedly provided with a second cavity 46121 inside. The through cavity 4622, the first cavity 46111, and the second cavity 46121 are coaxially arranged. The circuit breaker mounting plate 451 is fixedly provided with a mounting hole 4511. The size of the mounting hole 4511 is matched with the second shaft sleeve 4612. When the dynamic sealing device 46 is installed, the second shaft sleeve 4612 is inserted into the mounting hole 4511. The end surface of the first shaft sleeve 4611 abuts against the circuit breaker mounting plate 451. The circuit breaker mounting plate 451 is fixedly connected with the first shaft sleeve 4611 through a fastening screw 467, so as to fixedly install the dynamic sealing device 46 on the circuit breaker mounting plate 451.

[0091] 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 between the dynamic sealing device 46 and the circuit breaker mounting plate 451. 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.

[0092] In the embodiment, the end surface of the first shaft sleeve 4611 is fixedly provided with a sealing cavity 46112. The first sealing ring 463 is installed in the sealing cavity 46112.

[0093] The guide rod 411 penetrates the through cavity 4622, the first cavity 46111 and the second cavity 46121 in sequence and extends into the circuit breaker box 44, that is, the input end of the guide rod 411 is located in the circuit breaker box 44, the output end of the guide rod 411 is located in the circuit 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 concave first cavity 4641 is fixedly arranged on the inner side of the sealing sleeve 464, 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 inner concave second cavity 4642 is fixedly arranged on the outer side of the sealing sleeve 464, the second sealing element 4652 is installed in the second cavity 4642, preferably, the first sealing element 4651 and the second sealing element 4652 are star-shaped sealing rings for sealing the reciprocating guide rod 411; the double sealing structure designed in the moving direction of the guide rod 411 ensures that the guide rod 411 is in a real-time sealing state during movement.

[0094] The guide assembly includes the circuit breaker guide sleeve 466, which is fixedly arranged in the second cavity 46121 and sleeved on the guide rod 411 to guide the movement of the guide rod 411 and prevent the guide rod 411 from deviating during movement.

[0095] Compared with the prior art, the dynamic sealing device 46 has a simpler structure, high sealing efficiency and reduced cost.

[0096] To prevent the central axis of the guide rod 411 from deviating from the central axis of the dynamic sealing device 46 after long-term use, thereby affecting the sealing and transmission efficiency, the dynamic sealing device 46 further includes an adjustment mechanism for adjusting the sealing and transmission efficiency, the adjustment mechanism includes the cover plate mounting hole 4621 fixedly arranged on the shaft sleeve cover plate 462 and the shaft sleeve mounting hole 46113 fixedly arranged on the first shaft sleeve 4611, the cover plate mounting hole 4621 and the shaft sleeve mounting hole 46113 correspond to each other, the cover plate mounting hole 4621 is larger than the shaft sleeve mounting hole 46113, the diameter of the through cavity 4622 is larger than the diameter of the guide rod 411, and a gap exists between them, the deviation of the guide rod 411 is adjusted by adjusting the position of the guide rod 411 in the through cavity 4622, so that the guide rod 411 can maintain a sealing state and transmission efficiency after long-term use.

[0097] The dynamic sealing device 46 can be used in existing gas-filled cabinets.

[0098] In other embodiments, the multiple groups of sealing partitions 213 can be integrally formed.

[0099] Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

Claims

1. A gas-insulated vacuum circuit breaker, characterized by: The circuit breaker pole includes a guide rod, the circuit breaker operating device includes 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, the closing and opening power of the circuit breaker operating device is transmitted to the guide rod, the closing and opening operation of the vacuum circuit breaker is controlled, the guide rod is arranged outside the circuit breaker pole, the dynamic sealing device includes a dynamic sealing sleeve, a sleeve cover plate and a fine adjustment mechanism, the dynamic sealing sleeve includes 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, the fine adjustment mechanism adjusts the position of the guide rod, the sleeve cover plate is fixedly provided with a through cavity, the dynamic sealing sleeve is composed of a first sleeve and a second sleeve, the fine adjustment mechanism includes a cover plate mounting hole fixedly arranged on the sleeve cover plate and a sleeve mounting hole fixedly arranged on the first sleeve, the cover plate mounting hole is larger than the sleeve mounting hole, the diameter of the through cavity is larger than the diameter of the guide rod, and a gap exists between the two, the offset of the guide rod is adjusted by adjusting the position of the guide rod in the through cavity.

2. A vacuum interrupter for gas insulation as claimed in claim 1, wherein: The circuit breaker operating device is installed in a circuit breaker box, the circuit breaker box is installed on a circuit breaker mounting plate, the circuit breaker pole is installed on a pole mounting plate, the circuit breaker mounting plate is installed on a switch cabinet through a sealing device, the pole mounting plate is fixedly arranged on the circuit breaker mounting plate, and the dynamic sealing device is fixedly connected with the circuit breaker mounting plate.

3. A vacuum interrupter for gas insulation as claimed in claim 2, wherein: The power output mechanism corresponds to the circuit breaker pole one by one, the power output mechanism includes a circuit breaker hanging plate, two groups of circuit breaker hanging plates are horizontally symmetrical, a circuit breaker connecting plate is arranged between the two groups of circuit breaker hanging plates, the output end of the circuit breaker connecting plate is rotatably connected above the circuit breaker hanging plate, a remaining groove is fixedly arranged at the middle end of the circuit breaker connecting plate, a circuit breaker pin is arranged in the remaining groove, the circuit breaker pin is connected with the guide rod, a moving adjustment hole is fixedly arranged on the circuit breaker hanging plate, the circuit breaker pin slides along the moving adjustment hole, a spring assembly is rotatably arranged at the input end of the circuit breaker connecting plate, the power output mechanism is connected with the main shaft through a circuit breaker crank arm, the circuit breaker crank arm is fixedly connected with the main shaft, and the output end of the circuit breaker crank arm is rotatably connected with the spring assembly.

4. A vacuum interrupter for gas insulation as claimed in claim 1, wherein: The sleeve cover plate is fixedly connected with the dynamic sealing sleeve, a first cavity is fixedly arranged in the first sleeve, and a second cavity is fixedly arranged in the second sleeve.

5. A vacuum interrupter for gas insulation as claimed in claim 4, wherein: An installation hole is fixedly arranged on the circuit breaker mounting plate, the installation hole is matched with the second sleeve, the second sleeve is inserted into the installation hole, the end face of the first sleeve is abutted with the circuit breaker mounting plate, and the circuit breaker mounting plate is fixedly connected with the first sleeve through fastening screws.

6. A vacuum interrupter for gas insulation as claimed in claim 1, wherein: The sealing assembly includes a first sealing ring, a sealing sleeve, a first sealing element and a second sealing element, 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 element and the second sealing element are used for sealing the guide rod which reciprocates, the end face of the first sleeve is fixedly provided with a sealing cavity, and the first sealing ring is arranged in the sealing cavity.

7. A vacuum interrupter for gas insulation as claimed in claim 6, wherein: The guide rod sequentially penetrates the through cavity, the first cavity and the second cavity, the input end of the guide rod is located in the circuit breaker box, the output end of the guide rod is located in the circuit breaker pole, the sealing sleeve is installed in the first cavity, the sealing sleeve is sleeved on the outer surface of the guide rod, the inner concave first cavity is fixed on the inner side of the sealing sleeve, the first sealing element is installed in the first cavity, the first sealing element is sleeved on the outer surface of the guide rod, the inner concave second cavity is fixed on the outer side of the sealing sleeve, and the second sealing element is installed in the second cavity.

8. A vacuum interrupter for gas insulation as claimed in claim 4, wherein: The guide assembly comprises a circuit breaker guide sleeve, the circuit breaker guide sleeve is fixed 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.

Images