A gas insulated switch cabinet

Abstract

The invention discloses a gas insulated switch cabinet, comprising a cabinet body, wherein a gas box, an operating device and a vacuum circuit breaker are arranged in the cabinet body, a sealing device for sealing is arranged on the gas box, the operating device comprises a three-position mechanism, an auxiliary device and an interlocking device, the auxiliary device outputs an electrical signal of the position of the three-position mechanism, the interlocking device is used to prevent live operation of the three-position switch, the vacuum circuit breaker comprises a circuit breaker pole, a circuit breaker operating device and a dynamic sealing device, the circuit breaker pole comprises a guide rod, the dynamic sealing device controls the sealing state of the guide rod, and the circuit breaker operating device and the guide rod are linked to control the opening and closing operation of the vacuum circuit breaker. The invention makes the gas box a closed container by arranging the sealing device, and makes the sealing device a component of the gas box, and the structure is compact, and high-voltage live components can be installed and repaired through the sealing device to ensure the safety of operators and the switch cabinet.

Description

Technical Field

[0001] The invention belongs to the technical field of switch cabinets and relates to a gas insulated switch cabinet. Background Art

[0002] Medium voltage switchgear is an indispensable key product in power grid construction. At present, the switch cabinet has a complex structure, occupies a large space, is easily affected by the surrounding environment, and is a non-maintenance-free product. At present, in order to improve the insulation performance and realize maintenance-free primary circuit, the gas insulated switch cabinet adopts high-voltage live parts to be completely sealed in the gas box compartment. The sealing design of the gas box is a sealed pressure system, which puts higher requirements on the sealing performance of the gas box to ensure the safety of operators and switch cabinets. In addition, the structure of each component in the switch cabinet and the connection structure between the components are complicated. The present invention effectively solves this problem. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a gas insulated switch cabinet.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a gas insulated switch cabinet, characterized in that: it includes a cabinet body, a gas box, an operating device and a vacuum circuit breaker are arranged in the cabinet body, a sealing device for sealing is arranged on the gas box, the operating device includes a three-position mechanism, an auxiliary device and an interlocking device, the auxiliary device outputs an electrical signal of the position of the three-position mechanism, the interlocking device is used to prevent the three-position switch from being operated under power, the vacuum circuit breaker includes a circuit breaker pole, a circuit breaker operating device and a dynamic sealing device, the circuit breaker pole includes a guide rod, the dynamic sealing device controls the sealing state of the guide rod, and the circuit breaker operating device and the guide rod are linked to control the opening and closing operations of the vacuum circuit breaker.

[0005] Furthermore; the gas box adopts insulating gas medium, and a main busbar inflation compartment and a circuit breaker inflation compartment are arranged in the gas box, an operating mechanism room and a cable room are arranged in the cabinet, the main circuit of the three-position switch is installed in the main busbar inflation compartment, the operating device of the three-position switch is installed in the operating mechanism room, the circuit breaker pole is installed in the circuit breaker inflation compartment, and the circuit breaker operating device is installed in the operating mechanism room.

[0006] Furthermore; the sealing device includes a sealing cover plate, a sealing ring, a sealing partition and a sealing gasket, the sealing partition and the sealing gasket are fixedly arranged on the sealing cover plate, the sealing partition and the sealing gasket form a sealing cavity for installing the sealing ring, and the sealing ring and the sealing gasket perform double-layer sealing.

[0007] Furthermore; the three-position mechanism includes a frame, an electric operation component, a manual operation component and a transmission mechanism, the transmission mechanism includes a power component and a transmission component, the power component includes a transmission shaft and a transmission screw, the input end of the transmission shaft is connected to the transmission component, and the output end of the transmission shaft is connected to the main circuit of the three-position switch.

[0008] Furthermore; the transmission shaft and the transmission screw are rotatably connected to the frame, the input end and the output shaft of the transmission shaft rotate and penetrate the frame respectively, the input end of the transmission screw rotates and penetrates the frame, the output end of the transmission screw is rotatably connected to the frame, the output end of the transmission shaft is connected to the main circuit of the three-position switch, the input end of the transmission shaft is connected to the transmission assembly, the transmission assembly includes a transmission gear, a transition gear, an operating gear and a driving gear, the transmission gear, the transition gear, the operating gear and the driving gear are meshed and connected in pairs in sequence, the transmission gear is fixedly arranged on the output shaft of the three-position motor, the transition gear is rotatably connected to the frame, the operating gear is fixedly connected to the input end of the transmission shaft, and the driving gear is fixedly connected to the transmission screw.

[0009] Furthermore; the electric operation component includes a three-position motor, which is installed on a frame. The output shaft of the three-position motor rotates and passes through the frame, and the output shaft is connected to the transmission mechanism. The manual operation component includes a first operation port and a second operation port. The first operation port is fixed at the input end of the transmission screw or is an integral structure with the transmission screw, and the second operation port is fixed at the input end of the transmission shaft or is an integral structure with the transmission shaft. The transmission shaft or the transmission screw is driven to rotate through manual operation to control the opening and closing of the three-position switch and the grounding operation.

[0010] Furthermore; the interlocking device includes an interlocking transmission component, an interlocking input component and an interlocking output component. The closing and opening operations of the vacuum circuit breaker control the output action of the interlocking input component, and the interlocking output component controls the operation of the three-position mechanism.

[0011] Furthermore; the auxiliary device includes an auxiliary frame, an auxiliary switch and a conversion connecting rod device, the auxiliary switch is installed on the auxiliary frame, the conversion connecting rod device is linked with the transmission assembly, the auxiliary switch outputs an electrical signal of the position of the three-position mechanism, and the spring assembly is used for switching and restoring the auxiliary switch position.

[0012] Furthermore, the circuit breaker operating device includes a main shaft and a power output mechanism, the main shaft is linked with the power output mechanism, the power output mechanism is linked with the guide rod to control the opening and closing operation of the vacuum circuit breaker, 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 symmetrically arranged, 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 to the top of the circuit breaker hanging plate, a residual groove is fixedly arranged at the middle end of the circuit breaker connecting plate, a circuit breaker pin is arranged in the residual groove, the circuit breaker pin is connected to the guide rod, a movable adjustment hole is fixedly arranged on the circuit breaker hanging plate, the circuit breaker pin slides along the movable adjustment hole, a spring assembly is rotatably arranged at the input end of the circuit breaker connecting plate, the power output mechanism is connected to the main shaft through the circuit breaker crank arm, the circuit breaker crank arm is fixedly connected to the main shaft, and the output end of the circuit breaker crank arm is rotatably connected to the spring assembly.

[0013] Furthermore; the dynamic sealing device includes a dynamic sealing sleeve, a sleeve cover plate and a fine-tuning mechanism, the dynamic sealing sleeve includes a sealing assembly and a guide assembly, the sealing assembly is used to seal the guide rod, the guide assembly is used to guide the guide rod, and the fine-tuning mechanism adjusts the position of the guide rod.

[0014] In summary, the present invention is beneficial in that:

[0015] 1. The present invention makes the gas box a closed container by arranging a sealing device, and makes the sealing device a component of the gas box. The structure is compact, and high-voltage live parts can be installed and repaired through the sealing device. If an internal arc fault occurs in the gas chamber, the pressure in the gas chamber where the arc occurs increases, causing the pressure relief bursting membrane in the gas chamber to open, thereby ensuring the safety of the operator and the switch cabinet.

[0016] 2. The present invention receives electrical signals when the three-station is in different positions by cooperating with the conversion connecting rod device and the micro switch, and at the same time avoids excessive operation of the opening and closing operation of the three-station mechanism, thereby improving the transmission efficiency. The present invention designs the spring assembly to be linked with the auxiliary switch to realize the rapid switching function of the auxiliary switch.

[0017] 3. The present invention uses an interlocking device to prevent live operation of the three-position switch. The interlocking device can prevent the three-position mechanism from being operated when the vacuum circuit breaker is in the closed position. The three-position mechanism can only be operated when the vacuum circuit breaker is in the open position, thereby improving safety performance. The present invention realizes the transmission of the vacuum circuit breaker opening operation by means of multiple sets of connecting rod transmission, and has a simple structure and is easy to operate.

[0018] 4. The three-position switch of the present invention integrates manual operation and electric operation to meet different operation requirements. The manual or electric operation transmission shaft and the transmission screw directly transmit power to the main circuit of the three-position switch, reducing the power loss in the intermediate movement link and improving the efficiency of power transmission. The present invention also designs a linkage device, which is linked with the auxiliary switch through the linkage device to realize the timely transmission of the electrical signals of the three-position mechanism when it is in different positions. The present invention improves safety by designing a selection device to select one of the manual operation mode and the electric operation mode, that is, electric operation is not allowed during manual operation, and manual operation is not allowed during electric operation.

[0019] 5. The present invention arranges the guide rod of the vacuum circuit breaker outside the circuit breaker pole, and designs a power output mechanism to be linked with the guide rod, so that the closing and opening power of the operating device is directly transmitted to the guide rod, which reduces a lot of transmission links, reduces energy consumption, and ensures the transmission efficiency to the greatest extent. The movement of the guide rod 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.

[0020] 6. The present invention optimizes the structure of the dynamic sealing device so that the guide rod maintains a sealed state during the linear reciprocating motion, and the structure is simpler. The present invention seals the dynamic sealing device and the circuit breaker mounting plate through a first sealing ring, and seals the reciprocating guide rod through a sealing sleeve, a first sealing member and a second sealing member. By designing a double seal in the moving direction of the guide rod, it ensures that the guide rod is in a real-time sealing state during the movement of the guide rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the internal device distribution of the switch cabinet of the present invention.

[0022] Figure 2 It is a schematic diagram of the installation of the sealing device and the air box inspection plate of the present invention.

[0023] Figure 3 for Figure 2 Schematic diagram of the cross-section of AA.

[0024] Figure 4 It is a schematic diagram of the exploded view of the sealing device of the present invention.

[0025] Figure 5 for Figure 3 A magnified schematic diagram of B.

[0026] Figure 6 It is a schematic diagram of the operating device of the present invention.

[0027] Figure 7 It is a schematic diagram of the three-station mechanism for removing the indicator plate of the present invention.

[0028] Figure 8 It is a schematic diagram of the installation of the transmission assembly of the present invention.

[0029] Fig. 9 It is a schematic diagram of a selection board of the present invention.

[0030] Fig.10 The auxiliary device of the present invention is shown in FIG. Figure 1 .

[0031] Fig.11 The auxiliary device of the present invention is shown in FIG. Figure 2 .

[0032] Fig.12 It is a schematic diagram of the interlocking device of the present invention.

[0033] Fig.13 It is a schematic diagram of the first reset baffle of the present invention.

[0034] Fig.14 It is a schematic diagram of the vacuum circuit breaker of the present invention.

[0035] Fig.15It is a schematic diagram of the circuit breaker operating device of the present invention.

[0036] Fig.16 It is a front view of the dynamic sealing device of the present invention.

[0037] Fig.17 It is a rear view of the dynamic sealing device of the present invention.

[0038] Fig.18 for Fig.16 Schematic diagram of the cross-section of CC.

[0039] Fig.19 for Fig.18 A magnified schematic diagram of D in the middle. DETAILED DESCRIPTION

[0040] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0041] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0042] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0043] Embodiment 1:

[0044] like Figure 1-19 As shown, a gas insulated switchgear comprises a cabinet body 1, in which a gas box 2, an operating device 3 and a vacuum circuit breaker 4 are arranged, the gas box 2 is provided with a sealing device 21 for sealing, the operating device 3 comprises a three-position mechanism 31 and an interlocking device 32 for preventing live operation of the three-position switch, the vacuum circuit breaker 4 comprises a circuit breaker pole 41 and a circuit breaker operating device, and the two are sealed and connected by a dynamic sealing device 46.

[0045] The gas box 2 uses an insulating gas medium, preferably sulfur hexafluoride gas. In this embodiment, a main busbar inflation compartment 22 and a circuit breaker inflation compartment 23 are arranged in the gas box, and a small busbar chamber 11, an instrument chamber 12, an operating mechanism chamber 13 and a cable chamber 14 are arranged in the cabinet 1. The main circuit of the three-position switch is installed in the main busbar inflation compartment 22, and the operating device 3 of the three-position switch is installed outside the main busbar inflation compartment 22, that is, inside the operating mechanism chamber 13. The main busbar inflation compartment 22 is provided with a seal at the main circuit of the three-position switch and the installation position of the operating device 3 to achieve a sealed connection between the inside and outside of the compartment, so as to realize the working, isolation and grounding functions of the three-position switch and the interlocking of each function.

[0046] The circuit breaker pole 41 is installed in the circuit breaker gas-filled compartment 23, and the circuit breaker operating device is installed outside the circuit breaker gas-filled compartment 23, that is, in the operating mechanism chamber 13. The dynamic sealing device 46 is arranged in the circuit breaker gas-filled compartment 23 and is located at the installation position of the circuit breaker pole 41 and the circuit breaker operating device, and the dynamic sealing connection is realized through the dynamic sealing device 46.

[0047] The switch cabinet is provided with a front upper door 121 for the instrument room 12 located on the front, 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 located at the back. The front upper door 121 is equipped with opening and closing buttons, indicator lights, microcomputer protection devices, current and voltage meters, etc. The front lower door 131 is equipped with an observation window for observing the gas density meter, three-position switch, and circuit breaker indication. The front lower door 131 is equipped 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 cover plate 151, the rear middle cover plate 152 and the rear lower door 153 can be interlocked, and the rear lower door 153 is equipped with an observation window, a lighting fixture and an electrical interlock.

[0048] In this embodiment, an independent pressure release channel is provided in the cable chamber 14, and a brow is provided on the front of the small busbar chamber 11, which can be used to set the company's logo and switch cabinet purpose. The small busbar chamber 11 is used to lay the small busbar to provide the switch cabinet with the power required for the control loop or auxiliary loop, and is connected to the adjacent cabinet through terminals. Relay protection elements, instruments, live monitoring indicators and various secondary equipment are installed in the instrument room 12. The cable chamber 14 is used for supporting the gas box 2, installing cables and protecting functions. The main busbar inflatable compartment 22 and the circuit breaker inflatable compartment 23 are connected by independent sealing devices.

[0049] The sealing device 21 includes a sealing cover plate 211, a sealing ring 212, a sealing partition 213 and a sealing gasket 214. The sealing partition 213 and the sealing gasket 214 are fixed to the sealing cover plate 211, and the sealing partition 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 perform double sealing.

[0050] The sealing cover plate 211 is fixedly provided with a cover plate through hole 2111 , and the sealing cover plate 211 is configured as a square structure.

[0051] The sealing baffles 213 are provided in several groups, preferably four groups. The four groups of sealing baffles 213 form a limiting assembly for limiting the sealing ring 212. The four groups of sealing baffles 213 in the limiting assembly are connected end to end to form a square ring structure. The limiting assembly is installed on the sealing cover plate 211. The limiting assembly is installed in the axial direction of the cover plate through hole 2111.

[0052] In this embodiment, the sealing gasket 214 is configured as a square ring structure, the sealing gasket 214 is mounted on the sealing cover plate 211, and is mounted on the same side of the sealing cover plate 211 as the limiting component, and the limiting component is located in the inner ring of the sealing gasket 214. Figure 5 As shown, the limiting assembly and the sealing gasket 214 form a sealing cavity 216, and 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 assembly and the sealing gasket 214. The double sealing function is achieved by the sealing ring 212 and the sealing gasket 214, so that the gas box 2 becomes a closed container, ensuring the safety of the operator and the switch cabinet.

[0053] like Figure 2 As shown, the sealing device 21 is installed on the air box 2. For the convenience of explanation, the side plate of the air box 2 installed with the sealing device 21 is referred to as the air box inspection plate 20 in this embodiment. Specifically, the sealing cover plate 211 is fixedly provided with cover plate fixing holes 2112. There are multiple groups of cover plate fixing holes 2112, which are distributed in a rectangular shape on the sealing cover plate 211. The sealing gasket 214 is fixedly provided with sealing gasket fixing holes 2141, which correspond one-to-one with the cover plate fixing holes 2112. The air box inspection plate 20 is fixedly provided with studs 215, which correspond one-to-one with the sealing gasket fixing holes 2141 and the cover plate fixing holes 2112. The studs 215 sequentially penetrate the sealing gasket fixing holes 2141 and the cover plate fixing holes 2112 to play a positioning role, and the existing methods are used to achieve fixed connection, such as welding, threaded tightening, etc., which will not be further described here.

[0054] The air box inspection panel 20 is provided with a component installation inlet and outlet (not shown in the figure), and each component is installed into the air box 2 in sequence through the installation inlet and outlet. After the installation is completed, the sealing device 21 is installed on the air box inspection panel 20 to close the installation inlet and outlet. The double sealing design of the sealing device 21 ensures the sealing of the air box 2.

[0055] The sealing device 21 can be applied separately to an existing inflatable cabinet.

[0056] 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 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 electrical signal of the position of the three-position mechanism. The interlocking device 32 is used to prevent the three-position switch from being operated under power.

[0057] The three-station mechanism 31 includes a frame 310 and a control device 312. The control device 312 includes an electric operation component, a manual operation component and a transmission mechanism. The electric operation component or the manual operation component controls the state of the three-station switch by controlling the transmission component.

[0058] The three-station mechanism can be applied separately to the existing inflatable cabinet.

[0059] The frame 310 includes a first mechanism plate 3101 and a second mechanism plate 3102, which are fixedly connected via a frame support 3103, and the first mechanism plate 3101 and the second mechanism plate 3102 form a first installation cavity. In this embodiment, the first mechanism plate 3101 and the second mechanism plate 3102 are arranged in parallel.

[0060] The electric operation assembly includes a three-station motor 3121, which is installed in the first installation cavity and fixedly connected to the second mechanism plate 3102. The output shaft of the three-station motor 3121 rotates and penetrates the second mechanism plate 3102. Figure 8 As shown, the output shaft located outside the second mechanism plate 3102 is connected to the transmission mechanism, and the power is transmitted through the transmission mechanism to realize the closing and opening operations of the three-position switch.

[0061] The transmission mechanism includes a power component and a transmission component. The power component includes a transmission shaft 3145 and a transmission screw 3146. The transmission shaft 3145 and the transmission screw 3146 are both rotatably connected to the first mechanism plate 3101 and the second mechanism plate 3102. The input end and the output shaft of the transmission shaft 3145 rotate through the second mechanism plate 3102 and the first mechanism plate 3101 respectively. The input end of the transmission screw 3146 rotates through the second mechanism plate 3102, and the output end of the transmission screw 3146 is rotatably connected to the first mechanism plate 3101. The output end of the transmission shaft 3145 is connected to the main circuit of the three-position switch, and the input end of the transmission shaft 3145 is connected to the transmission component. The transmission shaft 3145 receives the power transmitted by the transmission component and transmits the power to the main circuit of the three-position switch to realize the closing and opening operations of the three-position switch.

[0062] The transmission assembly is located on the outer side of the second mechanism plate 3102, and includes a transmission gear 3141, a transition gear 3142, an operating gear 3143 and a driving gear 3144. The transmission gear 3141, the transition gear 3142, the operating gear 3143 and the driving gear 3144 are distributed in the transverse direction and meshed with each other in sequence. The transmission gear 3141 is fixedly arranged on the output shaft of the three-station motor 3121. The output shaft of the three-station motor 3121 drives the transmission gear 3141 to rotate. The transition gear 3142 is rotationally connected to the second mechanism plate 3102. The operating gear 3143 is fixedly connected to the input end of the transmission shaft 3145. The rotation of the operating gear 3143 drives the transmission shaft 3145 to rotate, thereby realizing the power input of the transmission shaft 3145. The driving gear 3144 is fixedly connected to the transmission screw 3146. Next, the driving gear 3144 rotates to drive the transmission screw 3146 to rotate, thereby realizing the power input of the transmission screw 3146. Specifically, the three-position motor 3121 is started, driving 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, and the operating 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, and the above-mentioned operation of the three-position switch is realized by electric control.

[0063] In this embodiment, the three-position switch integrates manual operation and electric operation. The manual operation component includes a first operation port 315 and a second operation port 316. Figure 8 As shown, the first operating port 315 is fixed at the input end of the transmission screw 3146 or is an integral structure with the transmission screw 3146, and the second operating port 316 is fixed at the input end of the transmission shaft 3145 or is an integral structure with the transmission shaft 3145. The transmission shaft 3145 or the transmission screw 3146 is directly driven to rotate through manual operation to realize the opening and closing and grounding operations of the three-position switch.

[0064] In this embodiment, linear transmission is performed through the transmission shaft 3145 and the transmission screw 3146, thereby improving the efficiency of motion transmission.

[0065] The three-position switch can be operated in either a manual operation mode or an electric operation mode, that is, it cannot be operated electrically during manual operation, and it cannot be operated manually during electric operation. To achieve this purpose, the three-position mechanism 31 includes a selection device, which includes a selection plate 3171. The selection plate 3171 is located outside the second mechanism plate 3102 and is slidably connected to the second mechanism plate 3102. Specifically, the second mechanism plate 3102 is slidably connected and fixed with a waist-shaped hole (not marked in the figure), and the selection plate 3171 is fixed with a baffle guide rod 3173 slidably connected to the waist-shaped hole The leaf spring lever 3174 limits the sliding direction of the selection plate 3171. The selection plate 3171 is further provided with a first operating hole 3174 and a second operating hole 3175. The first operating hole 3174 and the second operating hole 3175 are in the same horizontal plane as the first operating port 315 and the second operating port 316, and the center distance between the first operating hole 3174 and the second operating hole 3175 is greater than the center distance between the first operating port 315 and the second operating port 316. The first operating port 315 and the second operating port 316 are located between the first operating hole 3174 and the second operating hole 3175. The selection plate 3171 is further fixed with a lever 3172. The lever 3172 is manually moved to drive the selection plate 3171 to move right so that the first operating hole 3174 and the first operating port 315 are opposite to each other. At this time, the transmission screw 3146 is manually operated, or the selection plate 3171 is driven to move left so that the second operating hole 3175 and the second operating port 316 are opposite to each other. At this time, the transmission shaft 3145 is manually operated.

[0066] A linkage device is provided between the control device 312 and the auxiliary device 313, through which the movement of the control device 312 is transmitted to the auxiliary device 313, so as to realize the linkage of the auxiliary device 313, thereby outputting the electrical signal of the position of the three-station mechanism.

[0067] The linkage device includes a slider 3121, which is slidably connected to the transmission shaft 3145 and threadedly connected to the transmission screw 3146. The transmission screw 3146 rotates to drive the slider 3121 to slide along the transmission shaft 3145. A push rod 3122 is fixed on the slider 3121. The push rod 3122 moves with the slider 3121. When the push rod 3122 moves, the power is transmitted to the auxiliary device 313.

[0068] The auxiliary device 313 includes an auxiliary frame 3131, an auxiliary switch 3132 and a conversion link device 3135. The auxiliary switch 3132 is installed on the auxiliary frame 3131. The conversion link device 3135 is linked to the transmission component of the three-position mechanism. The auxiliary switch 3132 outputs an electrical signal of the position of the three-position mechanism. The spring assembly is used for switching and restoring the position of the auxiliary switch 3132.

[0069] The auxiliary frame 3131 includes a first auxiliary mechanism plate 31311 and a second auxiliary mechanism plate 31312. Two groups of auxiliary switches 3132 are provided and are 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 rotatably passes through the first auxiliary mechanism plate 31311 and the second auxiliary mechanism plate 31312.

[0070] The conversion link device 3135 is provided with two groups, which are connected to the auxiliary switches 3132 one by one. The conversion link device 3135 includes a first link 31351, a second link 31352, a third link 31353 and a fourth link 31354. The head and tail are rotationally connected in sequence, the first connecting rod 31351 and the fourth connecting rod 31354 are rotationally connected to the first auxiliary mechanism plate 31311 respectively, and the first connecting rod 31351 and the fourth connecting rod 31354 are fixedly provided with a pushing block 3137, the pushing rod 3122 interferes with the pushing block 3137, that is, the movement of the pushing rod 3122 drives the pushing block 3137 to rotate, thereby causing the first connecting rod 31351 and the fourth connecting rod 31354 to rotate, the second connecting rod 31352 and the third connecting rod 31353 are rotationally connected to the auxiliary output shaft 31321 through the adapter plate 31355, so as to limit the transmission of the second connecting rod 31352 and the third connecting rod 31353.

[0071] 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 switches 31351 are used for signal reception. Specifically, when the push rod 3122 drives the push block 3137 to rotate, driving the first connecting rod 31351 to rotate, the first connecting rod 31351 contacts the micro switch 31351, and 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 in the grounding position. When the push rod 3122 drives the push block 3137 to rotate, driving the fourth connecting rod 31354 The first connecting rod 31351 rotates, and the first connecting rod 31351 contacts 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-station mechanism is in the isolated position. The linkage device continues to operate, so that the push rod 3122 drives the push block 3137 of another set of conversion connecting rod devices 3135 to rotate, so that the first connecting rod 31351 of the other set contacts its corresponding micro switch 31351. At this time, the auxiliary switch 31351 outputs a signal that the three-station mechanism is in the closed position. This embodiment is linked with the three-station mechanism operating device to realize the setting of multiple groups of micro switches 31351 within one operation cycle to receive electrical signals when the three stations are in different positions, thereby avoiding the problem of the linkage device moving beyond the specified position.

[0072] The auxiliary device can be separately applied to the existing inflatable cabinet.

[0073] The spring assembly includes an auxiliary switch limiting plate 3133 and an auxiliary switch tension spring 3134. There are two groups of auxiliary switch limiting plates 3133, which are 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 through two groups of auxiliary switch tension springs 3134. The auxiliary switch limiting plates 3133 are 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 the stretching or recovery process.

[0074] The auxiliary switch limiting plate 3133 is slidably connected 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, and the moving direction of the auxiliary switch limiting plate 3133 is limited, the auxiliary output shaft 31321 penetrating 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, and the auxiliary switch push rod 31323 is located in the driving groove 31332. During the implementation process, under the action of the linkage device, the conversion connecting rod device 3135 When driven, the auxiliary output shaft 31321 is driven to rotate. When the auxiliary output shaft 31321 rotates, 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 to make the conversion link device 3135 disappear, the auxiliary switch tension spring 3134 recovers, causing the auxiliary output shaft 31321 to rotate in the opposite direction and return to the initial position. This embodiment realizes the quick switching function of the auxiliary switch through the auxiliary switch tension spring 3134.

[0075] The interlocking device 32 includes an interlocking transmission component 321, an interlocking input component 322 and an interlocking output component 323. The closing and opening operations of the vacuum circuit breaker 4 control the output action of the interlocking input component 322, and the interlocking output component 323 controls the operation of the control device 312 of the three-station mechanism 31.

[0076] The interlock input assembly 322 includes a first input crank arm 3221 and a second input crank arm 3222. The second input crank arm 3222 is fixedly connected to the main shaft 42 of the vacuum circuit breaker 4. The output ends of the first input crank arm 3221 and the second input crank arm 3222 are rotatably connected. In this embodiment, when the vacuum circuit breaker 4 is opened, its output shaft rotates clockwise ( Fig.12 At this time, the second input crank arm 3222 moves upward under the drive of the second input crank arm 3222, and the action input by the vacuum circuit breaker 4 is transmitted to the interlock transmission assembly 321.

[0077] The interlocking transmission assembly 321 includes an interlocking transmission rotating shaft 3212, on which an interlocking transmission input crank arm 3211 and an interlocking transmission output crank arm 3214 are fixedly provided. The interlocking transmission input crank arm 3211 is rotatably connected to the first input crank arm 3221. Under the action of the first input crank arm 3221, the interlocking transmission input crank arm 3211 rotates in a counterclockwise direction ( Fig.12The interlocking transmission output crank arm 3214 is driven to rotate in the same direction. In this embodiment, the interlocking transmission assembly 321 is installed on the circuit breaker box 44. The interlocking transmission assembly 321 also includes an interlocking transmission mounting frame 3213 for mounting and fixing. The interlocking transmission rotating shaft 3212 is rotatably connected to the interlocking transmission mounting frame 3213.

[0078] The interlock output assembly 323 includes an interlock output pull plate 3231 and an interlock output sheet 3232. The interlock output pull plate 3231 is rotatably connected to the interlock transmission output crank arm 3214. An interlock tension spring (not shown) is arranged between the interlock output pull plate 3231 and the second mechanism plate 3102. After the interlock output pull plate 3231 is stretched, it quickly recovers. The interlock output pull plate 3231 and the interlock output sheet 3232 are fixedly connected. The interlock output sheet 3232 is slidably connected to the second mechanism plate 3102. Interlock output moving grooves 32322 distributed in the vertical direction are fixedly arranged on the interlock output sheet 3232. There are two groups of interlock output moving grooves 32322 distributed in the horizontal direction. The second mechanism plate 3102 is fixedly provided with an interlock output moving rod 31021 corresponding to the interlock output moving groove 32322. Through the two groups of interlock output moving grooves 32322 The interlock output moving rod 31021 guides the moving direction of the interlock output piece 3232. The interlock output piece 3232 is provided with two groups of horizontally symmetrically distributed limiting pieces 32321. The limiting pieces 32321 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 the restricted state. When the vacuum circuit breaker 4 is in the open state, under the action of the interlock transmission output crank arm 3214, the interlock output pull plate 3231 moves downward, thereby driving the interlock output piece 3232 to move downward. The limiting piece 32321 moves to make the control device 312 out of the restricted state. At this time, the control device 312 can perform three-position operation to ensure safety. The above structure can prevent the three-position switch from being operated under power, that is, the interlock device is used to realize that when the vacuum circuit breaker 4 is in the closed position, the three-position mechanism cannot be operated. Only when the vacuum circuit breaker 4 is in the open position, the three-position mechanism can be operated.

[0079] In this embodiment, the interlocking device 32 limits the movement of the control device 312 by limiting the selection device. Specifically, the control device 312 also includes an interlocking operation limiting component 3123. The interlocking operation limiting component 3123 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 have the same structure. The structure of the first reset baffle 31231 is described below.

[0080] A sliding guide rod 31233 is fixedly provided on the second mechanism plate 3102, and a sliding guide groove 312313 is fixedly provided on the first reset baffle plate 31231. The sliding guide rod 31233 passes through the sliding guide grooves 312313 of the first reset baffle plate 31231 and the second reset baffle plate 31232 to slide and limit the direction to the left and right.

[0081] The interlocking operation limiting assembly 3123 limits the selection device, specifically, a selection limiting cavity 3170 and a selection limiting plate 3177 are fixedly provided on the selection plate 3171, a baffle protrusion 312311 is fixedly provided above the first reset baffle 31231, and 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, and the selection limiting plate 3177 is arranged between the two groups of baffle protrusions 312311, and the baffle protrusion 312311 of the second reset baffle 31232 is inserted into the selection limiting cavity 3170, thereby limiting the selection plate 3171, and only when the baffle protrusion 312311 moves, can the selection plate 3171 move left and right to perform three-station operation.

[0082] The interlocking device 32 limits the interlocking operation limiting assembly 3123. Specifically, a reset push plate 312312 is fixedly provided on the lower side of the first reset baffle 31231. When the interlocking device 32 and the interlocking operation limiting assembly 3123 are in the restricted state, the two groups of reset push plates 312312 are located between the limiting plates 32321. At this time, the three-position operation cannot be performed by operating the selection plate 3171. When the vacuum circuit breaker 4 is in the open state, under the action of the interlocking device 32, the interlocking output plate 3232 moves downward, causing the limiting plate 32321 to move downward, and the interlocking device 32 and the interlocking operation limiting assembly 3123 are out of the restricted state. At this time, the movable selection plate 3171 can be used for three-position operation.

[0083] The interlocking device can be applied separately to existing inflatable cabinets.

[0084] The three-station mechanism 31 also includes an indicator plate 300, which is located on the outer side of the selection plate 3171 and is fixedly connected to the second mechanism plate 3102. An indicator through-hole 3001, a first indicator operating hole 3002 and a second indicator operating hole 3003 are fixedly provided on the indicator plate 300. The first indicator operating hole 3002 and the second indicator operating hole 3003 are respectively opposite to the first operating port 315 and the second operating port 316. The lever 3172 passes through the indicator through-hole 3001, and the indicator plate 300 is provided with a three-station operation indication mark.

[0085] The vacuum circuit breaker 4 includes a circuit breaker pole 41, a circuit breaker operating device and a dynamic sealing device 46. The circuit breaker pole 41 includes a guide rod 411. The circuit breaker operating device includes a main shaft 42 and a power output mechanism 43. The dynamic sealing device 46 maintains the sealing state of the guide rod 411. The main shaft 42 is linked with the power output mechanism 43, and the power output mechanism 43 is linked with the guide rod 411 to control the opening and closing operations of the vacuum circuit breaker 4.

[0086] In this embodiment, only the main shaft 42 and the power output mechanism 43 of the circuit breaker operating device are shown, and the remaining components not shown in the figure adopt the existing technology.

[0087] 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 of the operating mechanism chamber 13 through the above-mentioned sealing device, the pole mounting plate 452 is fixed on the circuit breaker mounting plate 451, the dynamic sealing device 46 is fixedly connected to the circuit breaker mounting plate 451, the guide rod 411 passes through the dynamic sealing device 46 for sealing connection, and passes through the circuit breaker mounting plate 451 to extend into the circuit breaker box 44.

[0088] The power output mechanism 43 is provided with three groups, and the three groups of power output mechanisms 43 correspond to the circuit breaker poles 41 one by one. The power output mechanism 43 includes a circuit breaker hanging plate 433 fixedly mounted on the circuit breaker box 44. The 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. The output end of the circuit breaker connecting plate 432 is rotatably connected to the upper part of the circuit breaker hanging plate 433. A residual groove (not shown) is fixedly arranged at the middle end of the circuit breaker connecting plate 432. A circuit breaker pin 434 is arranged in the residual groove. The circuit breaker pin 434 is connected to the guide rod 411. A movable adjustment is fixedly arranged on the circuit breaker hanging plate 433. The movable adjustment hole 4331 is horizontally distributed in the length direction, the circuit breaker pin 434 is inserted into the movable adjustment hole 4331 and can slide along the movable adjustment hole 4331, and the input end of the circuit breaker connecting plate 432 is rotatably provided with a spring assembly, the spring assembly includes a spring pressure plate 435 and a circuit breaker compression spring 431 sleeved on the spring pressure plate 435, and the three groups of power output mechanisms 43 are connected to the main shaft 42 through the circuit breaker crank arm 430, the circuit breaker crank arm 430 is fixedly connected to the main shaft 42, and the output end of the circuit breaker crank arm 430 is rotatably connected to the spring assembly. During the implementation process, when the circuit breaker needs to be opened, the main shaft 42 rotates clockwise ( Fig.14 The spring assembly rotates in the same direction, and the spring assembly drives the circuit breaker connecting plate 432 to move. Fig.14 From a visual angle, the circuit breaker pin 434 drives the guide rod 411 to move outward, so that the moving contact and the static contact in the circuit breaker pole 41 are separated, thereby realizing the opening operation of the vacuum circuit breaker 4, and the closing operation can be performed in the reverse direction.

[0089] In this 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, which reduces a lot of transmission links, reduces energy consumption, and ensures the transmission efficiency to the greatest extent. 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 operations of the vacuum circuit breaker 4.

[0090] The power output mechanism 43 of the vacuum circuit breaker 4 can be used alone in an existing inflatable cabinet.

[0091] The dynamic sealing device 46 includes a dynamic sealing sleeve 461, a sleeve cover plate 462 and a fine-tuning mechanism. The dynamic sealing sleeve 461 includes a sealing assembly and a guiding assembly. The sealing assembly is used to seal the guide rod 411 of the vacuum circuit breaker 4, the guiding assembly is used to guide the guide rod 411, and the fine-tuning mechanism adjusts the position of the guide rod 411.

[0092] The shaft sleeve cover plate 462 is fixedly connected to the dynamic seal shaft sleeve 461, and the shaft sleeve cover plate 462 is fixedly provided with a through cavity 4622. 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 provided in the first shaft sleeve 4611, and a second cavity 46121 is fixedly provided in the second shaft sleeve 4612. The through cavity 4622, the first cavity 46111 and the second cavity 46121 are coaxially arranged. A mounting hole 4511 is fixedly provided on the circuit breaker mounting plate 451. The size of the mounting hole 4511 matches that of the second shaft sleeve 4612. When the dynamic seal shaft sleeve 461 is installed, the second shaft sleeve 4612 is inserted into the mounting hole 4511, and the end face of the first shaft sleeve 4611 abuts against the circuit breaker mounting plate 451. The circuit breaker mounting plate 451 and the first shaft sleeve 4611 are connected. The dynamic sealing device 46 is fixedly mounted on the circuit breaker mounting plate 451 by fastening the screws 467 .

[0093] 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 to seal 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 to seal the guide rod 411 that performs reciprocating motion.

[0094] In this embodiment, a sealing cavity 46112 is fixedly disposed on the end surface of the first shaft sleeve 4611 , and the first sealing ring 463 is installed in the sealing cavity 46112 .

[0095] The guide rod 411 sequentially passes through the through cavity 4622, the first cavity 46111 and the second cavity 46121, and extends into the circuit breaker housing 44, that is, the input end of the guide rod 411 is located in the circuit breaker housing 44, the output end of the guide rod 411 is located in the circuit breaker pole 41, and the sealing sleeve 464 is installed in the first cavity 46111. It is sleeved on the outer surface of the guide rod 411, and a concave first cavity 4641 is fixedly provided on the inner side of the sealing sleeve 464, and a first sealing member 4651 is installed in the first cavity 4641. The first sealing member 4651 is sleeved on the outer surface of the guide rod 411, and a concave second cavity 4642 is fixedly provided on the outer side of the sealing sleeve 464, and a second sealing member 4652 is installed in the second cavity 4642. Preferably, the first sealing member 4651 and the second sealing member 4652 adopt star-shaped sealing rings for sealing the guide rod 411 that performs reciprocating motion. In this embodiment, a double seal is designed in the moving direction of the guide rod 411 to ensure that the guide rod 411 is in a real-time sealing state during its movement.

[0096] The guide assembly includes a circuit breaker guide sleeve 466, which is fixed in the second cavity 46121 and sleeved on the guide rod 411. The circuit breaker guide sleeve 466 guides the movement of the guide rod 411 to prevent the guide rod 411 from deflecting during movement.

[0097] Compared with the prior art, the dynamic sealing device 46 of this embodiment has a simpler structure, a higher sealing efficiency, and reduces the cost of the dynamic sealing device.

[0098] In order to prevent the central axis of the guide rod 411 from being offset 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 also includes a fine-tuning mechanism, which is adjusted through the fine-tuning mechanism to ensure the sealing and transmission efficiency. The fine-tuning mechanism includes a cover plate mounting hole 4621 fixed to the shaft sleeve cover plate 462 and a shaft sleeve mounting hole 46113 fixed to the first shaft sleeve 4611. The cover plate mounting hole 4621 and the shaft sleeve mounting hole 46113 correspond to each other one by one. 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. There is a gap between the two. By adjusting the position of the guide rod 411 in the through cavity 4622, the offset of the guide rod 411 is adjusted, thereby ensuring that the guide rod 411 maintains a sealing state and transmission efficiency after long-term use.

[0099] The dynamic sealing device 46 can be applied separately to the existing inflatable cabinet.

[0100] In other embodiments, multiple sets of sealing partitions 213 can be integrally formed.

[0101] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A gas insulated switchgear, characterized in that: The cabinet includes a gas box, an operating device and a vacuum circuit breaker. The gas box is provided with a sealing device for sealing. The operating device includes a three-position mechanism, an auxiliary device and an interlocking device. The auxiliary device outputs an electrical signal of the position of the three-position mechanism. The interlocking device is used to prevent live operation of the three-position switch. The vacuum circuit breaker includes a circuit breaker pole, a circuit breaker operating device and a dynamic sealing device. The circuit breaker pole includes a guide rod. The dynamic sealing device controls the sealing state of the guide rod. The circuit breaker operating device and the guide rod are linked to control the opening and closing of the vacuum circuit breaker. Operation, the dynamic sealing device includes a dynamic sealing sleeve, a sleeve cover plate and a fine-tuning mechanism. The dynamic sealing sleeve is composed of a first sleeve and a second sleeve. The sleeve cover plate is fixed with a through cavity. The fine-tuning mechanism adjusts the position of the guide rod. The fine-tuning mechanism includes a cover plate mounting hole fixed on the sleeve cover plate and a sleeve mounting hole fixed on the first sleeve. The cover plate mounting hole and the sleeve mounting hole correspond to each other one by one. 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. There is a gap 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 gas insulated switchgear according to claim 1, characterized in that: The gas box adopts insulating gas medium, and a main busbar gas-filled compartment and a circuit breaker gas-filled compartment are arranged in the gas box, an operating mechanism room and a cable room are arranged in the cabinet, a main circuit of a three-position switch is installed in the main busbar gas-filled compartment, an operating device of the three-position switch is installed in the operating mechanism room, a circuit breaker pole is installed in the circuit breaker gas-filled compartment, and a circuit breaker operating device is installed in the operating mechanism room.

3. A gas insulated switchgear according to claim 1, characterized in that: The sealing device comprises a sealing cover plate, a sealing ring, a sealing partition and a sealing gasket. The sealing partition and the sealing gasket are fixedly arranged on the sealing cover plate. The sealing partition and the sealing gasket form a sealing cavity for installing the sealing ring. The sealing ring and the sealing gasket perform double-layer sealing.

4. A gas insulated switchgear according to claim 1, characterized in that: The three-position mechanism includes a frame, an electric operation component, a manual operation component and a transmission mechanism. The transmission mechanism includes a power component and a transmission component. The power component includes a transmission shaft and a transmission screw. The input end of the transmission shaft is connected to the transmission component, and the output end of the transmission shaft is connected to the main circuit of the three-position switch.

5. A gas insulated switchgear according to claim 4, characterized in that: The transmission shaft and the transmission screw are rotatably connected to the frame, the input end and the output shaft of the transmission shaft rotate and penetrate the frame respectively, the input end of the transmission screw rotates and penetrates the frame, the output end of the transmission screw is rotatably connected to the frame, the output end of the transmission shaft is connected to the main circuit of the three-position switch, the input end of the transmission shaft is connected to the transmission assembly, the transmission assembly includes a transmission gear, a transition gear, an operating gear and a driving gear, the transmission gear, the transition gear, the operating gear and the driving gear are meshed and connected in pairs in sequence, the transmission gear is fixedly arranged on the output shaft of the three-position motor, the transition gear is rotatably connected to the frame, the operating gear is fixedly connected to the input end of the transmission shaft, and the driving gear is fixedly connected to the transmission screw.

6. A gas insulated switchgear according to claim 4, characterized in that: The electric operation component includes a three-position motor, which is installed on a frame. The output shaft of the three-position motor rotates and passes through the frame, and the output shaft is connected to the transmission mechanism. The manual operation component includes a first operation port and a second operation port. The first operation port is fixed at the input end of the transmission screw or is an integral structure with the transmission screw, and the second operation port is fixed at the input end of the transmission shaft or is an integral structure with the transmission shaft. The transmission shaft or the transmission screw is driven to rotate through manual operation to control the opening and closing of the three-position switch and the grounding operation.

7. The gas insulated switchgear according to claim 1, characterized in that: The interlocking device comprises an interlocking transmission component, an interlocking input component and an interlocking output component. The closing and opening operations of the vacuum circuit breaker control the output action of the interlocking input component, and the interlocking output component controls the operation of the three-position mechanism.

8. A gas insulated switchgear according to claim 4, characterized in that: The auxiliary device includes an auxiliary frame, an auxiliary switch and a conversion connecting rod device. The auxiliary switch is installed on the auxiliary frame. The conversion connecting rod device is linked with the transmission component. The auxiliary switch outputs an electrical signal of the position of the three-position mechanism. The spring component is used for switching and restoring the auxiliary switch position.

9. The gas insulated switchgear according to claim 1, characterized in that: The circuit breaker operating device comprises a main shaft and a power output mechanism, the main shaft is linked with the power output mechanism, the power output mechanism is linked with the guide rod to control the opening and closing operation of the vacuum circuit breaker, the power output mechanism corresponds to the circuit breaker pole one by one, 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, the output end of the circuit breaker connecting plate is rotatably connected to the upper part of the circuit breaker hanging plate, a residual groove is fixedly arranged at the middle end of the circuit breaker connecting plate, a circuit breaker pin is arranged in the residual groove, the circuit breaker pin is connected to the guide rod, a movable adjustment hole is fixedly arranged on the circuit breaker hanging plate, the circuit breaker pin slides along the movable adjustment hole, a spring assembly is rotatably arranged at the input end of the circuit breaker connecting plate, the power output mechanism is connected to the main shaft through the circuit breaker crank arm, the circuit breaker crank arm is fixedly connected to the main shaft, and the output end of the circuit breaker crank arm is rotatably connected to the spring assembly.

10. The gas insulated switchgear according to claim 1, characterized in that: The dynamic seal sleeve comprises a seal assembly and a guide assembly, wherein the seal assembly is used to seal the guide rod, and the guide assembly is used to guide the guide rod.

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