Operating device for a gas-insulated switchgear

Abstract

The application discloses an operating device of a gas insulated switch cabinet, comprising a three-position mechanism, an auxiliary device and an interlocking device, the three-position mechanism comprising an electric operating assembly, a manual operating assembly and a transmission mechanism, the transmission mechanism comprising a power assembly and a transmission assembly, the power assembly comprising a transmission shaft and a transmission screw rod, the input end of the transmission shaft being connected with the transmission assembly, the output end of the transmission shaft being connected with the main circuit of the three-position switch, the auxiliary device outputting an electrical signal of the position of the three-position mechanism, and the interlocking device being used for preventing live operation of the three-position switch, the application receives the electrical signal of the three-position switch at different positions through the cooperation of the conversion connecting rod device and the micro switch, simultaneously avoids over operation of the opening and closing operation of the three-position mechanism, improves transmission efficiency, and realizes the quick switching function of the auxiliary switch through the cooperation of the spring assembly and the auxiliary switch.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of switch cabinets, and relates to an operating device of a gas insulated switch cabinet. BACKGROUND

[0002] The medium voltage switch device 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, is a non-maintenance-free product, and the operating device usually has a complex structure, unstable performance and high manufacturing cost. The structure of each component in the switch cabinet and the connection structure between the components are complex, and the application effectively solves the problem. SUMMARY

[0003] The application provides an operating device of a gas insulated switch cabinet to overcome the defects of the prior art.

[0004] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme: an operating device of a gas insulated switch cabinet, characterized by comprising a three-position mechanism, an auxiliary device and an interlocking device, the three-position mechanism comprising an electric operating assembly, a manual operating assembly and a transmission mechanism, the transmission mechanism comprising a power assembly and a transmission assembly, the power assembly comprising a transmission shaft and a transmission screw rod, the input end of the transmission shaft being connected with the transmission assembly, the output end of the transmission shaft being connected with the main circuit of the three-position switch, the auxiliary device outputting an electrical signal of the position of the three-position mechanism, and the interlocking device being used for preventing the three-position switch from being operated under electricity.

[0005] Further, the three-position mechanism comprises a rack, and the electric operating assembly, the manual operating assembly and the transmission mechanism are installed on the rack, the rack comprises a first mechanism plate and a second mechanism plate, the first mechanism plate and the second mechanism plate are fixedly connected through a rack support column, and the first mechanism plate and the second mechanism plate form a first installation cavity.

[0006] Further, the transmission shaft and the transmission screw rod are rotationally connected with the first mechanism plate and the second mechanism plate, the input end and the output shaft of the transmission shaft are rotationally penetrated through the second mechanism plate and the first mechanism plate respectively, the input end of the transmission screw rod is rotationally penetrated through the second mechanism plate, the output end of the transmission screw rod is rotationally connected with the first mechanism plate, the output end of the transmission shaft is connected with the main circuit of the three-position switch, the input end of the transmission shaft is connected with the transmission assembly, the transmission assembly comprises 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 sequentially and alternately meshed and connected, the transmission gear is fixedly arranged on the output shaft of the three-position motor, the transition gear is rotationally connected with the second mechanism plate, the operating gear is fixedly connected with the input end of the transmission shaft, and the driving gear is fixedly connected with the transmission screw rod.

[0007] Further, the electric operating assembly comprises a three-position motor, which is installed in the first installation cavity and fixedly connected with the second mechanism plate, and an output shaft of the three-position motor penetrates through the second mechanism plate and is connected with the transmission mechanism.

[0008] Further, the manual operating assembly comprises a first operating port and a second operating port, the first operating port is fixedly arranged at the input end of the transmission screw or is in an integral structure with the transmission screw, the second operating port is fixedly arranged at the input end of the transmission shaft or is in an integral structure with the transmission shaft, and the transmission shaft or the transmission screw is driven to rotate by manual operation to control the opening and closing of the three-position switch and the grounding operation.

[0009] Further, the three-position mechanism further comprises a selection device, the selection device comprises a selection plate, the selection plate is slidably connected with the second mechanism plate, the selection plate is further provided with a first operating hole and a second operating hole, the first operating hole and the second operating hole are in the same horizontal plane as the first operating port and the second operating port, the center distance of the first operating hole and the second operating hole is greater than the center distance of the first operating port and the second operating port, and the first operating port and the second operating port are located between the first operating hole and the second operating hole.

[0010] Further, the interlocking device comprises an interlocking transmission assembly, an interlocking input assembly and an interlocking output assembly, the opening and closing operation of the vacuum circuit breaker controls the output action of the interlocking input assembly, and the interlocking output assembly controls the operation of the three-position mechanism.

[0011] Further, the interlocking input assembly comprises a first input crank arm and a second input crank arm, the second input crank arm is fixedly connected with the main shaft of the vacuum circuit breaker, the output end of the first input crank arm is rotatably connected with the second input crank arm, the interlocking transmission assembly comprises an interlocking transmission rotating shaft, the interlocking transmission rotating shaft is fixedly provided with an interlocking transmission input crank arm and an interlocking transmission output crank arm, the interlocking transmission input crank arm is rotatably connected with the first input crank arm, the interlocking output assembly comprises an interlocking output pull plate and an interlocking output sheet, the interlocking output pull plate is rotatably connected with the interlocking transmission output crank arm, the interlocking output pull plate and the interlocking output sheet are fixedly connected, and the interlocking output sheet is slidably connected with the rack of the three-position mechanism.

[0012] Further, the interlocking output sheet is provided with two groups of horizontally symmetrical limiting sheets, the limiting sheets are used to limit the movement of the three-position mechanism, the vacuum circuit breaker is in the closing state, the limiting sheets are in the limiting state with the three-position mechanism, and the vacuum circuit breaker is in the opening state and is separated from the limiting state of the three-position mechanism by the limiting sheets.

[0013] Further, the auxiliary device comprises an auxiliary frame, an auxiliary switch and a conversion linkage device, the auxiliary switch is installed on the auxiliary frame, the conversion linkage device is linked with a transmission assembly of the three-position mechanism, the auxiliary switch outputs an electrical signal of a position of the three-position mechanism, and the spring assembly is used for switching and returning of the position of the auxiliary switch.

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

[0015] 1. The present application receives electrical signals of different positions of the three-position mechanism through the cooperation of the conversion linkage device and the micro switch, avoids over operation of the three-position mechanism during opening and closing operations, improves transmission efficiency, and realizes the rapid switching function of the auxiliary switch through the linkage of the spring assembly and the auxiliary switch.

[0016] 2. The present application prevents live operation of the three-position switch through the interlocking device, realizes that the three-position mechanism cannot be operated when the vacuum circuit breaker is in the closing position, and only when the vacuum circuit breaker is in the opening position, the three-position mechanism can be operated, thereby improving safety performance, and the present application realizes transmission of the opening operation of the vacuum circuit breaker through the mode of multiple linkage transmission, and has the advantages of simple structure and convenient operation.

[0017] 3. The three-position switch of the present application integrates manual operation and electric operation to meet different operation requirements, and the manual or electric operation transmission shaft and transmission screw directly transmit power to the main circuit of the three-position switch, thereby reducing power loss in intermediate motion links and improving power transmission efficiency; the present application also designs a linkage device, which is linked with the auxiliary switch to realize timely transmission of electrical signals of different positions of the three-position mechanism; and the present application improves safety by designing a selection device to select one of the manual operation mode and the electric operation mode, that is, manual operation cannot be performed when electric operation is performed, and electric operation cannot be performed when manual operation is performed. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an internal device distribution schematic diagram of the switch cabinet of the present application.

[0019] Figure 2 It is an installation schematic diagram of the sealing device and the gas tank maintenance plate of the present application.

[0020] Figure 3 It is Figure 2 a sectional view of A-A.

[0021] Figure 4 It is an exploded schematic diagram of the sealing device of the present application.

[0022] Figure 5 It is Figure 3 an enlarged schematic diagram of B.

[0023] Figure 6 This is a schematic diagram of the operating device of the present invention.

[0024] Figure 7 This is a schematic diagram of the three-station mechanism of the present invention with the indicator plate removed.

[0025] Figure 8 This is a schematic diagram of the installation of the transmission assembly of the present invention.

[0026] Figure 9 This is a schematic diagram of the selection panel of the present invention.

[0027] Figure 10 Schematic diagram of the auxiliary device of the present invention Figure 1 .

[0028] Figure 11 Schematic diagram of the auxiliary device of the present invention Figure 2 .

[0029] Figure 12 This is a schematic diagram of the interlocking device of the present invention.

[0030] Figure 13 This is a schematic diagram of the first reset baffle of the present invention.

[0031] Figure 14 This is a schematic diagram of the vacuum circuit breaker of the present invention.

[0032] Figure 15 This is a schematic diagram of the circuit breaker operating device of the present invention.

[0033] Figure 16 This is a front view of the dynamic sealing device of the present invention.

[0034] Figure 17 This is a rear view of the dynamic sealing device of the present invention.

[0035] Figure 18 for Figure 16 A cross-sectional diagram of CC.

[0036] Figure 19 for Figure 18 An enlarged schematic diagram of D in the diagram. Detailed Implementation

[0037] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0038] It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concepts of the present application, and only the components related to the present application are shown in the drawings, rather than being drawn according to the number, shape and size of the components in actual implementation. The actual implementation of each component may be a random change, and the component layout may be more complex.

[0039] All directional indications (such as up, down, left, right, front, back, transverse, longitudinal, …) in the embodiments of the present application are only used to explain the relative position relationship, motion condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly.

[0040] Embodiment one:

[0041] As shown in Figures 1-19 An operating device of a gas insulated switchgear is installed in the gas insulated switchgear, the switchgear includes a cabinet 1, the cabinet 1 is provided with a gas tank 2, an operating device 3 and a vacuum circuit breaker 4, the gas tank 2 is provided with a sealing device 21 for sealing, the operating device 3 includes a three-position mechanism 31 and an interlocking device 32 for preventing live operation of the three-position switch, and the vacuum circuit breaker 4 includes a circuit breaker pole 41 and a circuit breaker operating device, which are sealingly connected through a dynamic sealing device 46.

[0042] The gas tank 2 uses an insulating gas medium, preferably sulfur hexafluoride gas. In the embodiment, a main busbar inflation compartment 22 and a circuit breaker inflation compartment 23 are provided in the gas tank, a small busbar chamber 11, an instrument chamber 12, an operating mechanism chamber 13 and a cable chamber 14 are provided in the cabinet 1, the main circuit of the three-position switch is installed in the main busbar inflation compartment 22, the operating device 3 of the three-position switch is installed outside the main busbar inflation compartment 22, i.e. inside the operating mechanism chamber 13, and the main busbar inflation compartment 22 is provided with a sealing element at the installation position of the main circuit of the three-position switch and the operating device 3 to achieve sealing connection between the inside and outside of the compartment, realizing the functions of working, isolation and grounding of the three-position switch and interlocking of each function.

[0043] The circuit breaker pole 41 is installed in the circuit breaker inflation compartment 23, the circuit breaker operating device is installed outside the circuit breaker inflation compartment 23, i.e. inside the operating mechanism chamber 13, and the dynamic sealing device 46 is provided in the circuit breaker inflation compartment 23 and located at the installation position of the circuit breaker pole 41 and the circuit breaker operating device, realizing dynamic sealing connection through the dynamic sealing device 46.

[0044] The switch cabinet is provided with a front upper door 121 for the instrument room 12, a front lower door 131 for the operating mechanism room 13 on the front face, and a rear upper cover plate 151, a rear middle cover plate 152 and a rear lower door 153 on the rear face. The front upper door is assembled and provided with on-off button, indicator light, microcomputer protection device, ammeter and voltmeter. The front lower door 131 is assembled and provided with observation window for observing gas density meter, three-position switch and circuit breaker indication. The front lower door 131 is assembled and provided with circuit breaker emergency off button. The operating mechanism is provided with interlocking mechanism 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 assembled and provided with observation window, illuminating lamp and electrical interlocking.

[0045] In the embodiment, the cable room 14 is provided with independent pressure release channel. The small busbar room 11 is provided with a brow on the front face. The brow can be provided with company logo and switch cabinet purpose. The small busbar room 11 is provided with small busbar for laying small busbar to provide power supply required by control loop or auxiliary loop of the switch cabinet and connected with adjacent cabinet through terminal. The instrument room 12 is installed with relay protection element, instrument, live monitoring indicator and various secondary equipment. The cable room 14 is used for supporting gas tank 2, installing and protecting cable. The main busbar inflation compartment 22 and the circuit breaker inflation compartment 23 are connected through independent sealing device.

[0046] The sealing device 21 comprises 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 arranged 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.

[0047] The sealing cover plate 211 is fixedly provided with a cover plate perforation 2111. The sealing cover plate 211 is provided in square structure.

[0048] The sealing partition plate 213 is provided with a plurality of groups, preferably four groups. The four groups of sealing partition plates 213 form a limiting assembly for limiting the sealing ring 212. The four groups of sealing partition plates 213 are connected at the head and tail 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 perforation 2111.

[0049] In the embodiment, the sealing gasket 214 is provided in square ring structure. 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. Figure 5As shown, the limiting assembly and the sealing gasket 214 form a sealing cavity 216, the sealing cavity 216 is a square ring structure, the sealing ring 212 is installed in the sealing cavity 216, that is, the sealing ring 212 is located between the limiting assembly and the sealing gasket 214, and the double sealing function is realized 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 operator and the switch cabinet.

[0050] As shown in the figure, Figure 2 As shown, the sealing device 21 is installed on the gas tank 2, for the convenience of describing this embodiment, the side plate of the gas tank 2 installed with the sealing device 21 is referred to as the gas tank maintenance plate 20, specifically, the sealing cover plate 211 is fixedly provided with cover plate fixing holes 2112, the cover plate fixing holes 2112 are provided in multiple groups and 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, the sealing gasket fixing holes 2141 correspond to the cover plate fixing holes 2112 one by one, the gas tank maintenance plate 20 is fixedly provided with studs 215, the studs 215 correspond to the sealing gasket fixing holes 2141 and the cover plate fixing holes 2112 one by one, the studs 215 pass through the sealing gasket fixing holes 2141 and the cover plate fixing holes 2112 in sequence, play a positioning role, and are fixedly connected in the existing manner, such as welding, screwing, etc., which will not be described further here.

[0051] The gas tank maintenance plate 20 is provided with a component installation inlet and outlet (not shown in the figure), through which each component is installed in the gas tank 2 in sequence, 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 sealing property of the gas tank 2 is ensured through the double sealing design of the sealing device 21,

[0052] The sealing device 21 can be used alone in the existing gas-filled cabinet.

[0053] 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, and the interlocking device 32 is used to prevent live operation of the three-position switch.

[0054] 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.

[0055] The three-position mechanism can be used alone in the existing gas-filled cabinet.

[0056] The rack 310 comprises 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 column 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.

[0057] The electrically operated assembly comprises a three-position motor 3121, the three-position motor 3121 is installed in the first installation cavity and is fixedly connected with the second mechanism plate 3102, an output shaft of the three-position motor 3121 is rotatably connected through the second mechanism plate 3102, as shown, the output shaft located outside the second mechanism plate 3102 is connected with a transmission mechanism, power is transmitted through the transmission mechanism to realize the closing and opening operation of the three-position switch. Figure 8

[0058] The transmission mechanism comprises a power assembly and a transmission assembly, the power assembly comprises a transmission shaft 3145 and a transmission screw rod 3146, the transmission shaft 3145 and the transmission screw rod 3146 are both rotatably connected with the first mechanism plate 3101 and the second mechanism plate 3102, an input end of the transmission shaft 3145 is rotatably connected through the second mechanism plate 3102 and the first mechanism plate 3101 respectively, an input end of the transmission screw rod 3146 is rotatably connected through the second mechanism plate 3102, an output end of the transmission screw rod 3146 is rotatably connected with the first mechanism plate 3101, an output end of the transmission shaft 3145 is connected with a 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 power transmitted by the transmission assembly and transmits the power to the main circuit of the three-position switch to realize the closing and opening operation of the three-position switch.

[0059] ​The transmission assembly is located outside the second mechanism plate 3102, and includes a transmission gear 3141, a transition gear 3142, an operation gear 3143, and a drive gear 3144. The transmission gear 3141, the transition gear 3142, the operation gear 3143, and the drive gear 3144 are distributed in 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 to the second mechanism plate 3102. The operation gear 3143 is fixedly connected to the input end of the transmission shaft 3145. The operation gear 3143 drives the transmission shaft 3145 to rotate, thereby achieving power input of the transmission shaft 3145. The drive gear 3144 is fixedly connected to the transmission screw 3146. The drive gear 3144 drives the transmission screw 3146 to rotate, thereby achieving power input of the transmission screw 3146. Specifically, the three-position motor 3121 is started to drive the transmission gear 3141 to rotate. The transmission gear 3141 drives the transition gear 3142 to rotate. The transition gear 3142 drives the operation gear 3143 to rotate. The operation gear 3143 drives the drive gear 3144 to rotate, so that the transmission shaft 3145 transmits power to the main circuit of the three-position switch. Through the above, the opening and closing operation of the three-position switch is controlled by electricity.

[0060] In this embodiment, the three-position switch integrates manual operation and electric operation. The manual operation assembly includes a first operation port 315 and a second operation port 316, as shown in Figure 8 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. 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. The transmission shaft 3145 or the transmission screw 3146 is directly driven to rotate by manual operation, thereby achieving the opening and closing operation and the grounding operation of the three-position switch.

[0061] In this embodiment, linear transmission is achieved through the transmission shaft 3145 and the transmission screw 3146, thereby improving the efficiency of motion transmission.

[0062] The manual operation mode and the electric operation mode of the three-position switch are operated alternatively, 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 the purpose, the three-position mechanism 31 comprises a selection device, the selection device comprises 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), the selection plate 3171 is fixedly provided with a baffle guide rod 3173 and a leaf spring shifting rod 3174 in sliding connection with the waist-shaped hole, the sliding direction of the selection plate 3171 is limited, 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, and 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 provided with a shifting rod 3172, manual movement of the shifting rod 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 manual operation transmission screw 3146 is operated, or drives the selection plate 3171 to move leftward so that the second operation hole 3175 is opposite to the second operation port 316, at this time, the manual operation transmission shaft 3145 is operated.

[0063] The linkage device is arranged between the control device 312 and the auxiliary device 313, the movement of the control device 312 is transmitted to the auxiliary device 313 through the linkage device, the linkage of the auxiliary device 313 is realized, and the electrical signal output of the three-position mechanism position is realized.

[0064] The linkage device comprises a sliding block 3121, the sliding block 3121 is in sliding connection with the transmission shaft 3145 and is in threaded connection with the transmission screw 3146, the transmission screw 3146 rotates to drive the sliding block 3121 to slide along the direction of the transmission shaft 3145, the sliding block 3121 is fixedly provided with a pushing rod 3122, the pushing rod 3122 moves with the sliding block 3121, and the pushing rod 3122 transmits power to the auxiliary device 313 when the pushing rod 3122 moves.

[0065] 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, the conversion linkage device 3135 is in linkage with the transmission assembly of the three-position mechanism, the auxiliary switch 3132 outputs the electrical signal of the three-position mechanism position, and a spring assembly is used for switching and restoring the position of the auxiliary switch 3132.

[0066] The auxiliary frame 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 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 is rotatably penetrated through the first auxiliary mechanism plate 31311 and the second auxiliary mechanism plate 31312.

[0067] The conversion connecting rod device 3135 is provided with two groups and connected with the auxiliary switch 3132 one by one, the conversion connecting rod device 3135 comprises a first connecting rod 31351, a second connecting rod 31352, a third connecting rod 31353 and a fourth connecting rod 31354, the first connecting rod 31351, the second connecting rod 31352, the third connecting rod 31353 and the fourth connecting rod 31354 are sequentially rotatably connected in head-to-tail mode, the first connecting rod 31351 and the fourth connecting rod 31354 are respectively rotatably connected with the first auxiliary mechanism plate 31311, 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 pushing rod 3122 moves to drive the pushing block 3137 to rotate, and then the first connecting rod 31351 and the fourth connecting rod 31354 are rotated, the second connecting rod 31352 and the third connecting rod 31353 are rotatably connected with the auxiliary output shaft 31321 through a conversion plate 31355, and the transmission of the second connecting rod 31352 and the third connecting rod 31353 is limited.

[0068] 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.

[0069] The auxiliary device can be used alone in the existing gas-filled cabinet.

[0070] 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.

[0071] 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 rod 31312 is located in an auxiliary switch limiting slot 31331 fixedly arranged on the auxiliary switch limiting plate 3133, 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 slot 31332, the auxiliary switch push rod 31323 is located in the driving slot 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 is restored, the auxiliary output shaft 31321 is reversely rotated and restored to the initial position, and the rapid switching function of the auxiliary switch is realized through the auxiliary switch tension spring 3134 in the embodiment.

[0072] 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.

[0073] 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 input action of the vacuum circuit breaker 4 to the interlocking transmission assembly 321. Figure 12

[0074] The interlocking transmission assembly 321 comprises an interlocking transmission rotating shaft 3212, the interlocking transmission rotating shaft 3212 is fixedly provided with an interlocking transmission input 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 interlock transmission output crank arm 3214 rotates in the same direction, and the interlock transmission assembly 321 is installed on the circuit breaker box 44 in this embodiment. The interlock transmission assembly 321 further includes an interlock transmission mounting bracket 3213 for fixed installation. The interlock transmission rotating shaft 3212 is rotationally connected to the interlock transmission mounting bracket 3213.

[0075] The interlock output assembly 323 includes an interlock output pull plate 3231 and an interlock output piece 3232. The interlock output pull plate 3231 is rotationally connected to the interlock transmission output crank arm 3214. The interlock output pull plate 3231 is provided with an interlock pull spring (not shown in the figure) between the interlock output pull plate 3231 and the second mechanism plate 3102. The interlock output pull plate 3231 quickly returns after being stretched. The interlock output pull plate 3231 and the interlock output piece 3232 are fixedly connected. The interlock output piece 3232 is slidingly connected to the second mechanism plate 3102. The interlock output piece 3232 is fixedly provided with interlock output moving grooves 32322 distributed in the vertical direction. There are two groups of interlock output moving grooves 32322, which are horizontally symmetrically distributed. The second mechanism plate 3102 is fixedly provided with interlock output moving rods 31021 corresponding to the interlock output moving grooves 32322. The movement direction of the interlock output piece 3232 is guided by the two groups of interlock output moving grooves 32322 and the interlock output moving rods 31021. 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 are in the limiting state with the control device 312. When the vacuum circuit breaker 4 is in the open state, the interlock output pull plate 3231 is lowered under the action of the interlock transmission output crank arm 3214, thereby driving the interlock 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. Through the above structure, it can be prevented that the three-position switch is operated under live voltage, that is, through the interlock device, the function that the three-position mechanism cannot be operated when the vacuum circuit breaker 4 is in the closed position, and only when the vacuum circuit breaker 4 is in the open position, the three-position mechanism can be operated.

[0076] In this embodiment, the movement limitation of the control device 312 by the interlock device is achieved by limiting the selection device. Specifically, the control device 312 further includes an interlock operation limiting assembly 3123. The interlock operation limiting assembly 3123 is composed of a first reset 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. The structure of the first reset baffle 31231 is described below.

[0077] 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.

[0078] 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 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.

[0079] 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, the three-position operation of the selection plate 3171 cannot be performed by operation. 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.

[0080] The interlocking device can be used in the existing gas-filled cabinet.

[0081] 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 fixed with an indication through hole 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 indicating rod 3172 penetrates the indication through hole 3001. The indication plate 300 is provided with a three-position operation indication mark.

[0082] 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.

[0083] 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 prior art.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] The power output mechanism 43 of the vacuum circuit breaker 4 can be applied to the existing gas-filled cabinet.

[0088] 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 to seal the guide rod 411 of the vacuum circuit breaker 4, and the guide assembly is used to guide the guide rod 411. The fine adjustment mechanism adjusts the position of the guide rod 411.

[0089] 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, and 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.

[0090] 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.

[0091] In the embodiment, the end surface of the first shaft sleeve 4611 is fixedly provided with a sealing cavity 46112, and the first sealing ring 463 is installed in the sealing cavity 46112.

[0092] 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.

[0093] The guide assembly includes a circuit breaker guide sleeve 466 fixedly arranged in the second cavity 46121, the circuit breaker guide sleeve 466 is sleeved on the guide rod 411, and the circuit breaker guide sleeve 466 guides the movement of the guide rod 411 to prevent the guide rod 411 from deviating during movement.

[0094] Compared with the prior art, the dynamic sealing device 46 has a simpler structure, high sealing efficiency and reduced cost.

[0095] 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, the adjustment mechanism is used for adjustment to ensure the sealing and transmission efficiency, the adjustment mechanism includes a cover plate mounting hole 4621 fixedly arranged on the shaft sleeve cover plate 462 and a 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 are one-to-one corresponding, 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 the two, 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.

[0096] The dynamic sealing device 46 can be applied to an existing gas-filled cabinet.

[0097] In other embodiments, the plurality of sealing partitions 213 can be integrally formed.

[0098] 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. An operating device for a gas-insulated switchgear, characterized in that: The three-position mechanism includes an electric operation assembly, a manual operation assembly, and a transmission mechanism, the transmission mechanism includes a power assembly and a transmission assembly, the power assembly includes a transmission shaft and a transmission screw rod, the input end of the transmission shaft is connected with the transmission assembly, the output end of the transmission shaft is connected with the main circuit of the three-position switch, the auxiliary device outputs the electrical signal of the position of the three-position mechanism, the interlocking device is used for preventing the three-position switch from being operated under voltage, the interlocking device includes an interlocking transmission assembly, an interlocking input assembly, and an interlocking output assembly, the closing and opening operation of the vacuum circuit breaker controls the output action of the interlocking input assembly, the interlocking output assembly controls the operation of the three-position mechanism, the interlocking output assembly includes an interlocking output pull plate and an interlocking output piece, the interlocking output piece is provided with two groups of horizontally symmetrical limiting pieces, the limiting pieces are used for limiting the movement of the three-position mechanism, when the vacuum circuit breaker is in the closing state, the limiting pieces are in the limiting state with the three-position mechanism, and when the vacuum circuit breaker is in the opening state, the three-position mechanism is in the state of being released from the limiting by the limiting pieces.

2. A gas insulated switchgear operating device according to claim 1, characterized in that: The three-position mechanism includes a rack, the electric operation assembly, the manual operation assembly, and the transmission mechanism are installed on the rack, the rack includes a first mechanism plate and a second mechanism plate, the first mechanism plate and the second mechanism plate are fixedly connected through a rack support column, and the first mechanism plate and the second mechanism plate form a first installation cavity.

3. A gas insulated switchgear operating device according to claim 2, characterized in that: The transmission shaft and the transmission screw rod are rotationally connected with the first mechanism plate and the second mechanism plate, the input end of the transmission shaft and the output shaft are rotationally penetrated through the second mechanism plate and the first mechanism plate respectively, the input end of the transmission screw rod is rotationally penetrated through the second mechanism plate, the output end of the transmission screw rod is rotationally connected with the first mechanism plate, the output end of the transmission shaft is connected with the main circuit of the three-position switch, the input end of the transmission shaft is connected with the transmission assembly, the transmission assembly includes a transmission gear, a transition gear, an operation gear, and a driving gear, the transmission gear, the transition gear, the operation gear, and the driving gear are sequentially and meshingly connected two by two, the transmission gear is fixedly arranged on the output shaft of the three-position motor, the transition gear is rotationally connected with the second mechanism plate, the operation gear is fixedly connected with the input end of the transmission shaft, and the driving gear is fixedly connected with the transmission screw rod.

4. A gas insulated switchgear operating device according to claim 2, characterized in that: The electric operation assembly includes a three-position motor, the three-position motor is installed in the first installation cavity and is fixedly connected with the second mechanism plate, the output shaft of the three-position motor is rotationally penetrated through the second mechanism plate, and the output shaft located outside the second mechanism plate is connected with the transmission mechanism.

5. A gas insulated switchgear operating device according to claim 2, characterized in that: The manual operation assembly includes a first operation port and a second operation port, the first operation port is fixedly arranged at the input end of the transmission screw rod or is in an integral structure with the transmission screw rod, the second operation port is fixedly arranged at the input end of the transmission shaft or is in an integral structure with the transmission shaft, and the closing and opening of the three-position switch and the grounding operation are controlled by manually driving the transmission shaft or the transmission screw rod to rotate.

6. A gas insulated switchgear operating device according to claim 2, characterized in that: The three-station mechanism further comprises a selection device, the selection device comprises a selection plate, the selection plate is in sliding connection with the second mechanism plate, and the selection plate is further provided with a first operation hole and a second operation hole; the first operation hole and the second operation hole are in the same horizontal plane as the first operation port and the second operation port, and the center distance of the first operation hole and the second operation hole is greater than the center distance of the first operation port and the second operation port; the first operation port and the second operation port are located between the first operation hole and the second operation hole.

7. A device for operating a gas insulated switchgear according to claim 1, characterized in that: The interlocking input assembly comprises a first input crank arm and a second input crank arm, the second input crank arm is fixedly connected with the main shaft of the vacuum circuit breaker, the first input crank arm is rotationally connected with the output end of the second input crank arm, the interlocking transmission assembly comprises an interlocking transmission rotating shaft, the interlocking transmission rotating shaft is fixedly provided with an interlocking transmission input crank arm and an interlocking transmission output crank arm, the interlocking transmission input crank arm is rotationally connected with the first input crank arm, an interlocking output pull plate is rotationally connected with the interlocking transmission output crank arm, the interlocking output pull plate and an interlocking output piece are fixedly connected, and the interlocking output piece is in sliding connection with the rack of the three-station mechanism.

8. A device for operating a gas insulated switchgear according to claim 1, characterized in that: The auxiliary device comprises an auxiliary rack, an auxiliary switch and a conversion linkage device, the auxiliary switch is installed on the auxiliary rack, the conversion linkage device is linked with the transmission assembly of the three-station mechanism, the auxiliary switch 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.

Images