Operating mechanism of gas insulated switchgear

Abstract

A gas-insulated switchgear operating mechanism disclosed by the present invention comprises a three-position switch operating device, a circuit breaker operating device and a rear door interlocking device, the rear door interlocking device comprises a mechanism section and a locking section, and the mechanism section comprises a mechanism section connecting rod, an interlocking support seat, a positioning plate and a handle assembly. A first downward pressing baffle and a second downward pressing baffle are arranged on the mechanism section connecting rod, when the handle assembly is located at the upper hole position, the locking section locks the rear door, when the handle assembly is located at the lower hole position, the locking section unlocks the rear door, and the three-position switch operation device is matched with the mechanism section connecting rod in an interlocking mode. When the three-position switch is in an isolation switching-on or isolation switching-off state, the three-position switch operation device abuts against the lower portion of the first downward pressing baffle so as to limit downward movement of the mechanism section connecting rod. The circuit breaker operating device is in interlocking fit with the mechanism section connecting rod, and when the circuit breaker is in an opening state, the circuit breaker operating device abuts against the lower portion of the second downward pressing baffle to limit downward movement of the mechanism section connecting rod. The device has the advantages of being simple in structure, convenient to operate and good in safety.

Description

Technical Field

[0001] This invention relates to the field of switchgear technology, and in particular to an operating mechanism for a gas-insulated switchgear. Background Technology

[0002] Gas-insulated switchgear, also known as gas-insulated closed switchgear, belongs to the category of medium-voltage power distribution equipment. It features high operational reliability, strong environmental adaptability, low maintenance workload, and long maintenance cycles. This equipment seals components such as vacuum circuit breakers and three-position switches within a stainless steel gas chamber filled with insulating gas. The operating shaft connects to relevant external operating mechanisms within the gas chamber. These operating mechanisms are required to meet specific operational logic and comply with the "five electrical protections" requirements.

[0003] Traditional gas-insulated switchgear (i.e., cable compartment rear door) is typically not interlocked, relying solely on bolts for locking. In actual production practice, the applicant discovered that this type of gas-insulated switchgear presents certain safety hazards. When the gas-insulated switchgear is energized, accidental opening of the rear door could result in electric shock to operators, endangering personal safety and the normal operation of the equipment. Furthermore, the three-position switch, circuit breaker switch, and rear door cannot be interlocked or mutually locked, failing to meet the "five electrical safety" requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an air-filled cabinet operating mechanism that is simple in structure, convenient to operate and safe.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An operating mechanism for a gas-insulated switchgear includes a three-position switch operating device, a circuit breaker operating device, and a rear door interlocking device. The rear door interlocking device includes a mechanism section and a locking section. The mechanism section includes a mechanism section connecting rod, an interlocking bracket, a positioning plate, and a handle assembly. The interlocking bracket and the positioning plate are fixedly installed. The upper end of the mechanism section connecting rod passes through the interlocking bracket and connects to the handle assembly, and the lower end passes through the positioning plate and connects to the locking section. The interlocking bracket has a handle hole for cooperating with the handle assembly. The handle hole includes an upper hole position and a lower hole position. The mechanism section connecting rod has a first downward pressure baffle and a second downward pressure baffle. When the handle assembly is in the upper hole position, the locking section locks the rear door; when the handle assembly is in the lower hole position, the locking section unlocks the rear door. The three-position switch operating device is interlocked with the mechanism section connecting rod. When the three-position switch is in the isolation closing or isolation opening state, the three-position switch operating device abuts against the bottom of the first downward baffle to restrict the downward movement of the mechanism section connecting rod. The circuit breaker operating device is interlocked with the mechanism section connecting rod. When the circuit breaker is in the open state, the circuit breaker operating device abuts against the lower part of the second pressure baffle to restrict the downward movement of the mechanism section connecting rod.

[0006] As a further improvement to the above technical solution: The three-position switch operating device includes a three-position frame, a three-position spindle, a three-position interlocking assembly, a three-position spindle drive assembly, and a three-position switch transmission assembly. The three-position spindle is rotatably mounted on the three-position frame. The three-position spindle drive assembly is connected to the three-position spindle to drive its rotation. The three-position spindle is connected to the three-position switch via the three-position switch transmission assembly, enabling the three-position switch to switch between isolating closing, isolating opening, and grounding closing. The three-position interlocking assembly includes a screw, a screw assembly, a locking plate, a guide rod, and a tension spring. The screw is rotatably mounted on the three-position frame and is connected to the three-position main shaft. The screw assembly is fitted over the screw and threadedly engages with it. The guide rod is mounted on the three-position frame. The locking plate is fitted onto the guide rod and can move along it. The two ends of the tension spring are connected to the three-position frame and the locking plate, respectively. When the three-position switch is in the isolating open or isolating closed working state, under the tension of the tension spring, the locking plate retracts to below the first lower baffle to abut against it and against the interlocking bracket seat to restrict the downward movement of the connecting rod of the mechanism section. When the three-position switch is in the grounding closed state, the screw assembly moves to the locking plate and pushes the locking plate out of the first lower baffle to release the restriction on the movement of the connecting rod of the mechanism section.

[0007] The circuit breaker operating device includes a housing, a circuit breaker operating spindle assembly, and a circuit breaker operating spindle drive assembly. The circuit breaker operating spindle assembly includes a circuit breaker operating spindle and a closing / opening crank arm mounted on the circuit breaker operating spindle. The circuit breaker operating spindle drive assembly is connected to the circuit breaker operating spindle to drive the circuit breaker operating spindle to rotate. The circuit breaker operating spindle is rotatably mounted in the housing. The circuit breaker operating spindle is provided with a rear door interlocking baffle. When the handle assembly is in the upper hole position and the circuit breaker is in the open state, the circuit breaker operating spindle rotates to the first position, and the rear door interlocking baffle abuts against the lower part of the second downward pressure baffle to restrict the downward movement of the mechanism section connecting rod. When the circuit breaker is in the closed state, the circuit breaker operating spindle rotates to the second position, and the rear door interlocking baffle rotates to separate from the second downward pressure baffle to release the restriction on the downward movement of the mechanism section connecting rod.

[0008] The connecting rod of the mechanism section is also provided with a tripping baffle, and the housing is provided with a manual operation tripping button. When the handle assembly is in the lower hole position, the tripping baffle moves to the rear side of the manual operation tripping button to block the pressing of the manual operation tripping button.

[0009] The three-position switch operating device further includes an operating panel and a small valve assembly. The small valve assembly includes a valve plate and a valve handle disposed on the valve plate. The valve plate is disposed between the operating panel and the three-position frame. The operating panel has a valve handle hole, a first isolation operating hole, and a first grounding operating hole. The valve plate has a second isolation operating hole and a second grounding operating hole. The three-position frame has a third isolation operating hole and a third grounding operating hole. The valve handle hole includes a grounding switch position, an isolation switch position, and a central hole connecting the grounding switch position and the isolation switch position. When the valve handle moves to the grounding switch position, the second grounding operating hole connects the first grounding operating hole and the third grounding operating hole. When the valve handle moves to the isolation switch position, the second isolation operating hole connects the first isolation operating hole and the third isolation operating hole.

[0010] The gas-insulated switchgear operating mechanism also includes a three-position interlocking device with a circuit breaker. This device includes an interlocking frame, a top rod, a first interlocking crank arm, a push rod, a limit clamp, a guide plate, a first compression spring, and a first compression spring fixing pin. A first cooperating rod is provided at the lower end of the valve plate, and a second cooperating rod is provided on the circuit breaker operating spindle. The interlocking frame and guide plate are fixedly installed. The first compression spring fixing pin is fixedly installed on the top rod. The first compression spring is fitted onto the top rod and abuts against the guide plate and the first compression spring fixing pin. The upper end of the top rod passes through the guide plate and engages with one end of the first interlocking crank arm, and the lower end passes through the guide plate and engages with the second cooperating rod. The upper end is provided with a first pin, and the rear end of the push rod is provided with a second pin. The first interlocking crank arm is rotatably mounted on the interlocking frame. The first interlocking crank arm has a first slot and a second slot. The first pin slides in the first slot, and the second pin slides in the second slot. The push rod is movably mounted on the interlocking frame. The front end of the push rod has a limit slot. The limit clamp includes two clamping arms, which are respectively hinged to the interlocking frame, and the hinge points are located on both sides of the push rod. One side of each clamping arm is located in the limit slot. The first mating rod is located between the two clamping arms. Under the elastic force of the first compression spring, the two clamping arms are in a closed state. When the circuit breaker is in the closed state, the circuit breaker operating spindle rotates to the second position, and the second cooperating rod rotates below the top rod to restrict the downward movement of the top rod. The two clamping arms cannot open to restrict the movement of the valve plate. When the circuit breaker is in the open state, the circuit breaker operating spindle rotates to the first position, the second cooperating rod rotates to separate from the top rod to release the restriction on the movement of the top rod, and the two clamping arms can open to release the restriction on the movement of the valve plate.

[0011] The circuit breaker operating device also includes a circuit breaker position auxiliary detection component, which is signal-connected to the three-position spindle drive component. The circuit breaker position auxiliary detection component is used to detect the operating status of the circuit breaker. When the circuit breaker position auxiliary detection component detects that the circuit breaker is in the closed state, it controls the locking of the electric circuit of the three-position spindle drive component. When the circuit breaker position auxiliary detection component detects that the circuit breaker is in the open state, it controls the unlocking of the electric circuit of the three-position spindle drive component.

[0012] The lower end of the interlocking bracket is provided with a connecting rod travel switch, and the connecting rod of the mechanism section is provided with a switch plate that cooperates with the connecting rod travel switch. The connecting rod travel switch is signal connected to the circuit breaker operating spindle drive assembly. When the handle assembly is in the lower hole position, the connecting rod travel switch controls the locking of the electric tripping circuit of the circuit breaker operating spindle drive assembly.

[0013] The locking section includes an interlocking main shaft, a main shaft support guide seat, a support, a latch, and an interlocking assembly. The rear door is provided with a hook for locking with the latch. The main shaft support guide seat and the support are both fixedly installed. One end of the interlocking main shaft passes through the main shaft support guide seat and is connected to the interlocking assembly, while the other end passes through the support and is connected to the latch. The connecting rod of the mechanism section is interlocked with the interlocking main shaft through the interlocking assembly. The interlocking assembly includes a connecting rod assembly, a second interlocking crank arm, and a cylindrical head. The cylindrical head is located at one end of the interlocking main shaft. The second interlocking crank arm is rotatably mounted on the main shaft support guide seat. The lower end of the mechanism segment connecting rod is connected to the second interlocking crank arm via the connecting rod assembly to convert the up-and-down movement of the mechanism segment connecting rod into the rotation of the second interlocking crank arm. The second interlocking crank arm has a notch. When the handle assembly is in the upper hole position, the second interlocking crank arm rotates to the third position, and the projection of the notch on the interlocking spindle axis overlaps with the cylindrical head to block the passage of the cylindrical head. When the handle assembly is in the lower hole position, the second interlocking crank arm rotates to the fourth position, and the notch is aligned with the cylindrical head to allow the cylindrical head to pass through.

[0014] The locking section also includes an elastic element, which abuts against the rear end of the support and the interlocking main shaft. When the rear door is closed, the hook pushes the interlocking main shaft forward to compress the elastic element and pushes the cylindrical head out of the plane where the crank arm is located. When the rear door is opened, the elastic element, under the action of elastic restoring force, pushes the interlocking main shaft backward and pulls the cylindrical head back to the plane where the second interlocking crank arm is located. The support is provided with a protruding plate, and the latch is hinged to the interlocking main shaft. When the interlocking main shaft moves forward, the protruding plate abuts against the latch to drive the latch to rotate and lock with the hook. The mechanism section also includes a second compression spring and a second compression spring fixing pin. The second compression spring fixing pin is fixedly mounted on the mechanism section connecting rod, and the second compression spring is fitted onto the mechanism section connecting rod and abuts against the second compression spring fixing pin and the positioning plate.

[0015] Compared with the prior art, the advantages of the present invention are as follows: The gas-insulated switchgear operating mechanism of this invention can control the linkage state between the mechanism section and the locking section by adjusting the hole position of the handle assembly, thereby realizing the locking and unlocking operation of the rear door. It has a simple structure, convenient operation, and good safety. Through the double interlocking design formed by the three-position switch operating device and the circuit breaker operating device and the connecting rod of the mechanism section, the unlocking prerequisite of the rear door is limited. That is, the handle assembly can only be operated to unlock the gas-insulated switchgear is in a safe state when the gas-insulated switchgear is grounded and closed and the circuit breaker is closed. This can avoid the risk of operators accidentally opening the rear door when the equipment is energized or has residual voltage, thus eliminating the occurrence of electric shock accidents from the root and ensuring that the equipment meets the "five electrical protections" requirements.

[0016] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the operating mechanism of the gas-filled cabinet of the present invention (showing the gas-filled cabinet).

[0018] Figure 2 This is a schematic diagram of the structure of the gas-filled cabinet operating mechanism of the present invention.

[0019] Figure 3 This is a schematic diagram of the rear door interlocking device in the gas-filled cabinet operating mechanism of the present invention.

[0020] Figure 4 This is a schematic diagram of the mechanism section in the gas-filled cabinet operating mechanism of the present invention.

[0021] Figure 5 This is a structural schematic diagram of the mechanism section in the gas-filled cabinet operating mechanism of the present invention from another perspective.

[0022] Figure 6 This is a schematic diagram of the interlocking support base in the gas-filled cabinet operating mechanism of the present invention.

[0023] Figure 7 This is a structural schematic diagram of the interlocking support base in the gas-filled cabinet operating mechanism of the present invention from another perspective.

[0024] Figure 8 This is a schematic diagram of the handle assembly in the gas-filled cabinet operating mechanism of the present invention.

[0025] Figure 9 This is an exploded view of the handle assembly in the gas-filled cabinet operating mechanism of the present invention.

[0026] Figure 10 This is a side view of the rear door interlocking device in the gas-filled cabinet operating mechanism of the present invention (the cylindrical head and the second interlocking crank arm are misaligned).

[0027] Figure 11 This is a side view of the gas-filled cabinet operating mechanism of the present invention (the cylindrical head and the second interlocking crank arm are located on the same plane).

[0028] Figure 12 This is a front view of the gas-filled cabinet operating mechanism of the present invention (the cylindrical head and the second interlocking crank arm are misaligned).

[0029] Figure 13 This is a front view of the gas-filled cabinet operating mechanism of the present invention (the cylindrical head and the second interlocking crank arm are located on the same plane).

[0030] Figure 14 This is a schematic diagram of the three-position switch operating device in the gas-filled cabinet operating mechanism of the present invention.

[0031] Figure 15 This is an exploded schematic diagram of the three-position switch operating device in the gas-filled cabinet operating mechanism of the present invention.

[0032] Figure 16 This is a schematic diagram of the structure of the gas-filled cabinet operating mechanism of the present invention (the three-position switch transmission assembly is not shown).

[0033] Figure 17 This is a structural schematic diagram of the three-position switch operating device in the gas-filled cabinet operating mechanism of the present invention from another perspective.

[0034] Figure 18 This is a schematic diagram of the three-position switch operating device in the gas-filled cabinet operating mechanism of the present invention (the three-position frame is not shown).

[0035] Figure 19 This is a structural schematic diagram of the three-position switch operating device in the gas cabinet operating mechanism of the present invention from another perspective (the three-position frame is not shown).

[0036] Figure 20 This is a side view of the three-position switch operating device in the gas cabinet operating mechanism of the present invention when the valve handle is in the middle hole position.

[0037] Figure 21 This is a side view of the three-position switch operating device in the gas-filled cabinet operating mechanism of the present invention when the valve handle is in the isolating switch position.

[0038] Figure 22 This is a front view of the three-position switch operating device in the gas-filled cabinet operating mechanism of the present invention when the three-position switch is in the grounding closed position.

[0039] Figure 23This is a rear view of the three-position switch operating device in the gas-filled cabinet operating mechanism of the present invention when the three-position switch is in the grounding closed position.

[0040] Figure 24 This is a front view of the three-position switch operating device in the gas-filled switchgear operating mechanism of the present invention when the three-position switch is in the isolation tripping state.

[0041] Figure 25 This is a rear view of the three-position switch operating device in the gas-filled switchgear operating mechanism of the present invention when the three-position switch is in the isolation tripping state.

[0042] Figure 26 This is a front view of the three-position switch operating device in the gas-filled switchgear operating mechanism of the present invention when the three-position switch is in the isolation and closing position.

[0043] Figure 27 This is a rear view of the three-position switch operating device in the gas-filled switchgear operating mechanism of the present invention when the three-position switch is in the isolation and closing position.

[0044] Figure 28 This is a schematic diagram of the circuit breaker operating device of the gas-filled switchgear operating mechanism of the present invention.

[0045] Figure 29 This is a schematic diagram of the structure of the gas-filled switchgear operating mechanism, which is separated from the circuit breaker operating device, the three-position interlocking device with the circuit breaker, and the mechanism section.

[0046] Figure 30 This is an exploded schematic diagram of the circuit breaker operating device of the gas-filled switchgear operating mechanism of the present invention.

[0047] Figure 31 This is a schematic diagram of the three-position interlocking device with the circuit breaker in the gas-filled switchgear operating mechanism of the present invention (limit clamp closed).

[0048] Figure 32 This is a schematic diagram of the three-position interlocking device with the circuit breaker in the gas-filled switchgear operating mechanism of the present invention (limit clamp open).

[0049] Figure 33 This is a schematic diagram of the structure of the circuit breaker operating spindle assembly and the three-position interlocking device with the circuit breaker in the gas-insulated switchgear operating mechanism of the present invention when the circuit breaker is closed.

[0050] Figure 34 This is a schematic diagram of the structure of the circuit breaker operating spindle assembly and the three-position interlocking device with the circuit breaker in the gas-insulated switchgear operating mechanism of the present invention when the circuit breaker is tripped.

[0051] Figure 35 This is a schematic diagram of the structure of the circuit breaker operating spindle assembly and mechanism section of the gas-insulated switchgear operating mechanism of the present invention when the circuit breaker is closed.

[0052] Figure 36 This is a schematic diagram of the structure of the circuit breaker operating spindle assembly and mechanism section of the gas-insulated switchgear operating mechanism of the present invention when the circuit breaker is tripped.

[0053] Figure 37 This is a schematic diagram of the circuit breaker operating spindle assembly and mechanism section of the gas-insulated switchgear operating mechanism of the present invention from another perspective when the circuit breaker is closed.

[0054] The labels in the diagram represent: 1. Three-position switch operating device; 11. Three-position frame; 111. Third isolation operating hole; 112. Third grounding operating hole; 113. Manual / electric indicating limit switch; 12. Three-position spindle; 13. Three-position interlocking assembly; 131. Screw; 132. Screw assembly; 1321. First boss; 1322. Cam; 133. Locking plate; 134. Guide rod; 135. Tension spring; 14. Three-position spindle drive assembly; 15. Three-position switch transmission assembly; 16. Operation panel; 161. Valve handle hole; 1611. Grounding switch position; 1612. Isolation switch position; 1613. Center hole position; 162. First isolation operating hole; 163. First grounding operating hole; 17. Small valve assembly; 171. Valve plate; 1711. First mating rod; 1712. Second isolation operating hole; 1713. Second grounding operating hole; 172. Valve handle; 173. Third boss; 18. Position double confirmation assembly; 181. First limit switch group; 182. Second limit switch group; 183. Position indicator shaft; 1831. Bending guide groove; 1832. Second boss; 184. Mounting plate; 2. Circuit breaker operating device; 21. Housing; 212. Manual operation trip button plate; 22. Circuit breaker operating spindle assembly; 221. Circuit breaker Operating spindle; 2211, second mating rod; 222, opening / closing crank arm; 223, rear door interlocking baffle; 23, circuit breaker position auxiliary detection component; 3, rear door interlocking device; 31, mechanism section; 311, mechanism section connecting rod; 3111, first downward pressure baffle; 3112, second downward pressure baffle; 3113, opening baffle; 3114, switch impact plate; 312, interlocking bracket seat; 3121, connecting rod limit switch; 313, positioning plate; 314, handle assembly; 3141, reduced diameter section; 3142, handle pull rod; 3143, handle loop; 315, handle hole; 3151, upper hole; 3152, lower hole; 3 153. Reduction section; 316. Second compression spring; 32. Locking section; 321. Interlocking main shaft; 322. Main shaft support guide seat; 323. Support; 3231. Protruding plate; 324. Locking buckle; 325. Interlocking assembly; 3251. Linkage assembly; 3252. Second interlocking crank arm; 3253. Cylindrical head; 3254. Notch; 326. Elastic element; 4. Three-position interlocking device with circuit breaker; 41. Interlocking frame; 42. Top rod; 43. First interlocking crank arm; 44. Push rod; 441. Limiting groove; 45. Limiting clamp; 46. Guide plate; 47. First compression spring; 48. First compression spring fixing pin; 9. Rear door; 91. Hook. Detailed Implementation

[0055] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0056] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] like Figures 1 to 37 As shown, the gas-filled switchgear operating mechanism of this embodiment includes a three-position switch operating device 1, a circuit breaker operating device 2, and a rear door interlocking device 3. The rear door interlocking device 3 includes a mechanism section 31 and a locking section 32. The mechanism section 31 includes a mechanism section connecting rod 311, an interlocking bracket 312, a positioning plate 313, and a handle assembly 314. The interlocking bracket 312 and the positioning plate 313 are both fixedly installed. The upper end of the mechanism section connecting rod 311 passes through the interlocking bracket 312 and is connected to the handle assembly 314, and the lower end passes through... The positioning plate 313 is connected to the locking section 32. The interlocking bracket 312 has a handle hole 315 for cooperating with the handle assembly 314. The handle hole 315 includes an upper hole position 3151 and a lower hole position 3152. The connecting rod 311 of the mechanism section is provided with a first pressing baffle 3111 and a second pressing baffle 3112. When the handle assembly 314 is in the upper hole position 3151, the locking section 32 locks the rear door 9. When the handle assembly 314 is in the lower hole position 3152, the locking section 32 unlocks the rear door 9. The three-position switch operating device 1 is interlocked with the mechanism section connecting rod 311. When the three-position switch is in the isolation closing or isolation opening state, the three-position switch operating device 1 abuts against the bottom of the first downward baffle 3111 to restrict the downward movement of the mechanism section connecting rod 311. The circuit breaker operating device 2 is interlocked with the mechanism section connecting rod 311. When the circuit breaker is in the open state, the circuit breaker operating device 2 abuts against the lower part of the second pressure baffle 3112 to restrict the downward movement of the mechanism section connecting rod 311.

[0060] In this embodiment, the gas-filled cabinet operating mechanism, when in use, moves the handle assembly 314 to the upper hole position 3151, and the handle assembly 314 drives the locking section 32 to move through the mechanism section connecting rod 311 to lock the rear door 9. Moving the handle assembly 314 to the lower hole position 3152, the handle assembly 314 drives the locking section 32 through the mechanism section connecting rod 311 to unlock the rear door 9. Furthermore, due to the restriction of the mechanism section connecting rod 311 by the three-position switch operating device 1 and the circuit breaker operating device 2, the restriction of the mechanism section connecting rod 311 can only be released when the three-position switch is in the grounding closed state and the circuit breaker is in the closed state. At this time, the mechanism section connecting rod 311 can drive the handle assembly 314 to move from the upper hole position 3151 to the lower hole position 3152 to unlock the rear door 9. The gas-filled cabinet operating mechanism of this embodiment can control the linkage state between the mechanism section 31 and the locking section 32 by adjusting the hole position of the handle assembly 314, thereby realizing the locking and unlocking operation of the rear door 9. The structure is simple, the operation is convenient, and the safety is good. Through the double interlocking design formed by the three-position switch operating device 1 and the circuit breaker operating device 2 and the mechanism section connecting rod 311, the unlocking prerequisite of the rear door 9 is limited. That is, the handle assembly 314 can be operated to unlock the gas-filled cabinet only when the interior of the gas-filled cabinet is in a safe state of three-position switch grounding and circuit breaker closing. This can avoid the risk of operators accidentally opening the rear door 9 when the equipment is energized or has residual voltage, eliminate the occurrence of electric shock accidents from the root, and ensure that the equipment meets the "five electrical protections" requirements.

[0061] Furthermore, such as Figures 14 to 16As shown, in this embodiment, the three-position switch operating device 1 includes a three-position frame 11, a three-position spindle 12, a three-position interlocking assembly 13, a three-position spindle drive assembly 14, and a three-position switch transmission assembly 15. The three-position spindle 12 is rotatably mounted on the three-position frame 11. The three-position spindle drive assembly 14 is connected to the three-position spindle 12 to drive the three-position spindle 12 to rotate. The three-position spindle 12 is connected to the three-position switch through the three-position switch transmission assembly 15 to enable the three-position switch to switch between isolating closing, isolating opening, and grounding closing. The three-position interlocking assembly 13 includes a screw 131, a screw assembly 132, a locking plate 133, a guide rod 134, and a tension spring 135. The screw 131 is rotatably mounted on the three-position frame 11 and is drively connected to the three-position spindle 12. The screw assembly 132 is... The guide rod 134 is mounted on the three-position frame 11 and threadedly engaged with the screw 131. The locking plate 133 is fitted onto the guide rod 134 and can move along the guide rod 134. The two ends of the tension spring 135 are connected to the three-position frame 11 and the locking plate 133 respectively. When the three-position switch is in the isolation opening or isolation closing working state, under the tension of the tension spring 135, the locking plate 133 retracts to the lower part of the first lower baffle 3111 to abut against the first lower baffle 3111 and abut against the interlock bracket seat 312 to restrict the downward movement of the mechanism section connecting rod 311. When the three-position switch is in the grounding closing state, the screw assembly 132 moves to the locking plate 133 and pushes the locking plate 133 out of the lower part of the first lower baffle 3111 to release the restriction on the movement of the mechanism section connecting rod 311. By cooperating with the rear door interlocking device 3, the three-position interlocking component 13 can automatically interlock with the rear door 9 according to the actual working state of the three-position switch. When the three-position switch is in the grounded closed state, it ensures that the operator can safely open the rear door for maintenance and other operations. In the isolated open or isolated closed state, the locking plate 133 abuts against the lower part of the first downward baffle 3111 to restrict the downward movement of the connecting rod 311 of the mechanism section, preventing the handle component 314 from moving to the downward hole 3152, that is, preventing the rear door 9 from being unlocked. This can effectively prevent the risk of electric shock caused by the rear door being opened accidentally when the three-position switch is not grounded, further improving the safety of the gas-filled switchgear operation, meeting the design requirements of the "five-proof" interlocking of power equipment, and providing a reliable guarantee for the safe operation and maintenance of the equipment.

[0062] Furthermore, such as Figures 28 to 37As shown, in this embodiment, the circuit breaker operating device 2 includes a housing 21, a circuit breaker operating spindle assembly 22, and a circuit breaker operating spindle drive assembly. The circuit breaker operating spindle assembly 22 includes a circuit breaker operating spindle 221 and a closing / opening crank arm 222 mounted on the circuit breaker operating spindle 221. The circuit breaker operating spindle drive assembly is connected to the circuit breaker operating spindle 221 to drive the circuit breaker operating spindle 221 to rotate. The circuit breaker operating spindle 221 is rotatably mounted in the housing 21, and a rear door is provided on the circuit breaker operating spindle 221. When the handle assembly 314 is in the upper hole position 3151 and the circuit breaker is in the open state, the circuit breaker operating spindle 221 rotates to the first position, and the rear door interlocking baffle 223 abuts against the lower part of the second lower baffle 3112 to restrict the downward movement of the mechanism section connecting rod 311. When the circuit breaker is in the closed state, the circuit breaker operating spindle 221 rotates to the second position, and the rear door interlocking baffle 223 rotates to separate from the second lower baffle 3112 to release the restriction on the downward movement of the mechanism section connecting rod 311. By cooperating with the second downward pressure baffle 3112, the rear door interlocking baffle 223 can be used to interlock with the rear door 9 according to the actual working state of the circuit breaker. When the circuit breaker is in the open state, the rear door interlocking baffle 223 abuts against the lower part of the second downward pressure baffle 3112, restricting the downward movement of the connecting rod 311 of the mechanism section, preventing the handle assembly 314 from moving to the lower hole 3152, and preventing the rear door 9 from being unlocked. This effectively prevents the risk of electric shock caused by the rear door being accidentally opened when the circuit breaker is in the open state, and further improves the safety of the gas-filled switchgear. When the circuit breaker is in the closed state, the circuit breaker operating spindle 221 rotates to the second position, and the rear door interlocking baffle 223 rotates to separate from the second downward pressure baffle 3112. At this time, the handle assembly 314 can be moved downward to the lower hole 3152 to unlock the rear door 9.

[0063] Furthermore, in this embodiment, the connecting rod 311 of the mechanism section is also provided with a tripping baffle 3113, and the housing 21 is provided with a manual operation tripping button plate 212. When the handle assembly 314 is located in the lower hole position 3152, the tripping baffle 3113 moves to the rear side of the manual operation tripping button plate 212 to block the pressing of the manual operation tripping button plate 212. When the handle assembly 314 is located in the lower hole position 3152, that is, the rear door 9 is in the unlocked state, at this time, the tripping baffle 3113 moves to the rear side of the manual operation tripping button plate 212 to block the pressing of the manual operation tripping button plate 212, so that the circuit breaker cannot be manually tripped when the rear door 9 is in the unlocked state, further improving the safety of the gas-insulated switchgear.

[0064] Furthermore, such as Figures 14 to 27In this embodiment, the three-position switch operating device 1 further includes an operating panel 16 and a small valve assembly 17. The small valve assembly 17 includes a valve plate 171 and a valve handle 172 disposed on the valve plate 171. The valve plate 171 is disposed between the operating panel 16 and the three-position frame 11. The operating panel 16 is provided with a valve handle hole 161, a first isolation operating hole 162 and a first grounding operating hole 163. The valve plate 171 is provided with a second isolation operating hole 1712 and a second grounding operating hole 1713. The three-position frame 11 is provided with a third isolation operating hole 111 and a second grounding operating hole 1712 and a third grounding operating hole 1713. The three grounding operation holes 112 and the valve handle hole 161 include a grounding switch position 1611, an isolating switch position 1612, and a central hole position 1613 connecting the grounding switch position 1611 and the isolating switch position 1612. When the valve handle 172 moves to the grounding switch position 1611, the second grounding operation hole 1713 connects the first grounding operation hole 163 and the third grounding operation hole 112. When the valve handle 172 moves to the isolating switch position 1612, the second isolating operation hole 1712 connects the first isolating operation hole 162 and the third isolating operation hole 111. When performing grounding or isolation operations, operators must first move the valve handle 172 to the grounding switch position 1611 or the isolation switch position 1612 to connect the corresponding operating hole, and then insert the operating tool to perform the operation. This achieves interlocking of operations at the physical level, realizing the mechanical interlocking cooperation between the rear door interlocking device 3 and the circuit breaker operating device 2, effectively preventing misoperation. Furthermore, the setting of the small valve assembly 17 enables the three-position switch operating device 1 to achieve both manual and electric control while ensuring manual priority, making it highly applicable and safe.

[0065] Furthermore, in this embodiment, the three-station frame 11 is also provided with a manual-electric indicator limit switch 113, and the valve plate 171 is provided with a third boss 173 for cooperating with the manual-electric indicator limit switch 113. The manual-electric indicator limit switch 113 is signal connected to the three-station spindle drive assembly 14. When the valve handle 172 is in the middle hole position 1613, the third boss 173 triggers the manual-electric indicator limit switch 113 to control the three-station spindle drive assembly 14 to connect the electric circuit. When the valve handle 172 is in the grounding switch position 1611 or the isolating switch position 1612, the third boss 173 separates from the manual-electric indicator limit switch 113 to control the locking of the electric circuit of the three-station spindle drive assembly 14. The manual / electric indicator limit switch 113 and the third boss 173 work together to achieve interlocking between manual and electric operation. When the operator needs to perform manual operation, the valve handle 172 is moved to the grounding switch position 1611 or the isolating switch position 1612. At this time, the third boss 173 is separated from the manual / electric indicator limit switch 113, and the electric circuit of the three-position spindle drive assembly 14 is locked, avoiding mechanical conflict caused by simultaneous electric and manual operation. When the valve handle 172 is in the center hole position 1613, the third boss 173 triggers the manual / electric indicator limit switch 113, and the electric circuit of the three-position spindle drive assembly 14 is connected. The three-position spindle 12 can be driven to rotate electrically, realizing the electric operation of the three-position switch. This ensures the orderly switching between manual and electric operation modes and improves the safety and convenience of operation.

[0066] Furthermore, such as Figures 28 to 34As shown, in this embodiment, the gas-insulated switchgear operating mechanism also includes a three-position interlocking device 4 with a circuit breaker. The three-position interlocking device 4 with a circuit breaker includes an interlocking frame 41, a top rod 42, a first interlocking crank arm 43, a push rod 44, a limit clamp 45, a guide plate 46, a first compression spring 47, and a first compression spring fixing pin 48. The lower end of the valve plate 171 is provided with a first cooperating rod 1711, and the circuit breaker operating spindle 221 is provided with a second cooperating rod 2211. The interlocking frame 41 and the guide plate 46 are both fixedly installed. The first compression spring fixing pin 48 is fixedly installed on the top rod 42. The 7-piece set is mounted on the push rod 42 and abuts against the guide plate 46 and the first compression spring fixing pin 48. The upper end of the push rod 42 passes through the guide plate 46 and engages with one end of the first interlocking crank arm 43, and the lower end passes through the guide plate 46 and engages with the second mating rod 2211. The upper end of the push rod 42 is provided with a first pin, and the rear end of the push rod 44 is provided with a second pin. The first interlocking crank arm 43 is rotatably mounted on the interlocking frame 41. The first interlocking crank arm 43 is provided with a first slot and a second slot. The first pin slides in the first slot, and the second pin slides in the second slot. The push rod 44 is movably mounted on the interlocking frame 41. A limit groove 441 is provided at the front end of the push rod 44. The limit clamp 45 includes two clamping arms, which are respectively hinged to the interlocking frame 41, and the hinge points are located on both sides of the push rod 44. One side of the clamping arm is located in the limit groove 441. The first cooperating rod 1711 is located between the two clamping arms. Under the action of the elastic restoring force of the first compression spring 47, the two clamping arms are in a closed state. When the circuit breaker is in the closed state, the circuit breaker operating main shaft 221 rotates to the second position, and the second cooperating rod 2211 rotates to the bottom of the top rod 42 to restrict the top rod 42 from moving downward. The two clamping arms cannot open to restrict the movement of the valve plate 171. When the circuit breaker is in the open state, the circuit breaker operating main shaft 221 rotates to the first position, and the second cooperating rod 2211 rotates to separate from the top rod 42 to release the restriction on the movement of the top rod 42. The two clamping arms can open to release the restriction on the movement of the valve plate 171. Since the three-position switch cannot be opened or closed under load, the circuit breaker must be disconnected first, i.e., the circuit breaker is in the open state, before the three-position switch can perform isolation opening, isolation closing, and grounding closing operations.By setting up a three-position and circuit breaker interlocking device 4, the three-position switch operating device 1 and the circuit breaker operating device 2 are mechanically interlocked. When the circuit breaker is in the closed position, the three-position switch operating device 1 cannot switch the working state of the three-position switch. Specifically, when the circuit breaker is in the closed position, the circuit breaker operating spindle 221 rotates to the second position, and the second cooperating rod 2211 rotates to the bottom of the push rod 42 to restrict the push rod 42 from moving downward, so that the push rod 44 cannot move back and forth, thereby preventing the two clamping arms from opening to restrict the movement of the valve plate 171, and thus preventing manual operation to switch the working state of the three-position switch; when in the open position, the circuit breaker operating spindle 221 rotates to the first position. Position: The second mating rod 2211 rotates to separate from the top rod 42 to release the restriction on the movement of the top rod 42. Since the top rod 42 can move up and down, the valve plate 171 can move to open the two clamping arms, realizing the switching of the working state of the three-position switch. Through the setting of the first compression spring 47, when the second mating rod 2211 rotates to separate from the top rod 42, the elastic restoring force of the first compression spring 47 pushes the top rod 42 upward. The upward-moving top rod 42 drives the push rod 44 backward through the first interlocking crank arm 43. The backward-moving push rod 44 pulls the clamping arm to rotate one side, thereby driving the two clamping arms to close, realizing the reset of the top rod 42 and the clamping arms, preventing the top rod 42 from not being reset, which would cause interference with the second mating rod 2211.

[0067] Furthermore, in this embodiment, the circuit breaker operating device 2 also includes a circuit breaker position auxiliary detection component 23. The circuit breaker position auxiliary detection component 23 is signal-connected to the three-position spindle drive component 14. The circuit breaker position auxiliary detection component 23 is used to detect the operating status of the circuit breaker. When the circuit breaker position auxiliary detection component 23 detects that the circuit breaker is in the closed state, it controls the locking of the electric circuit of the three-position spindle drive component 14. When the circuit breaker position auxiliary detection component 23 detects that the circuit breaker is in the open state, it controls the unlocking of the electric circuit of the three-position spindle drive component 14. By setting the circuit breaker position auxiliary detection component 23, the three-position switch operating device 1 and the three-position and circuit breaker operating device 2 are electrically interlocked. When the circuit breaker is in the closed state, the three-position switch operating device 1 cannot switch the operating status of the three-position switch, preventing the three-position switch from malfunctioning when the circuit breaker is closed. This effectively avoids equipment failures and safety accidents caused by operating the three-position switch under load, providing more comprehensive protection for the stable operation of the gas-insulated switchgear.

[0068] Preferably, such as Figures 16 to 27As shown, in this embodiment, the three-position switch operating device 1 further includes a position double confirmation component 18. The position double confirmation component 18 includes a first limit switch group 181, a second limit switch group 182, a position indicator shaft 183, and a mounting plate 184. The mounting plate 184 is fixedly mounted on the three-position frame 11. The first limit switch group 181 and the second limit switch group 182 are respectively mounted on the front and back of the mounting plate 184. The position indicator shaft 183 is rotatably mounted on the three-position frame 11. The screw assembly 132 is provided with a first boss 1321 and a cam 1322. The position indicator shaft 183 is provided with a bent guide groove 1831 and a second boss 1832. The cam 1322 is movably mounted in the bent guide groove 1831. The first boss 1321 is used to cooperate with the first limit switch group 181 to detect the working state of the three-position switch. The second boss 1832 is used to cooperate with the second limit switch group 182 to detect the working state of the three-position switch. Different rotation angles of the three-position spindle 12 correspond to different working states of the three-position switch. By setting the screw 131 and the screw assembly 132, the rotation angle of the three-position spindle 12 can be converted into different positions of the screw assembly 132 in the axial direction of the screw 131. The first boss 1321 on the screw assembly 132 moves with the screw assembly 132, thereby triggering the corresponding limit switch in the first limit switch group 181. It is possible to accurately detect the three working states of the three-position switch—grounding closing, isolation opening, and isolation closing—from the dimension of the axial movement of the screw assembly 132, thereby realizing the operation of the three-position switch. The first confirmation of the status: Through the cooperation of cam 1322 and bending guide groove 1831, the movement of screw assembly 132 in the axial direction of screw 131 can drive position indicator shaft 183 to rotate. The second boss 1832 on position indicator shaft 183 rotates with position indicator shaft 183, thereby triggering the corresponding limit switch in the second limit switch group 182. The three working states of the three-position switch can be confirmed for the second time from the dimension of rotation of position indicator shaft 183. This forms a dual confirmation mechanism with the first limit switch group 181, further ensuring the accuracy of the working state judgment of the three-position switch.

[0069] Furthermore, in this embodiment, a connecting rod limit switch 3121 is provided at the lower end of the interlocking bracket 312, and a switch plate 3114 cooperating with the connecting rod limit switch 3121 is provided on the connecting rod 311 of the mechanism section. The connecting rod limit switch 3121 is signal-connected to the circuit breaker operating spindle drive assembly. When the handle assembly 314 is in the lower hole position 3152, the connecting rod limit switch 3121 controls the locking of the electric tripping circuit of the circuit breaker operating spindle drive assembly. By setting the connecting rod limit switch 3121, the circuit breaker cannot perform electric tripping operation when the rear door 9 is in the unlocked state, further improving the safety of the gas-filled cabinet.

[0070] Further, in this embodiment, the locking section 32 includes an interlocking main shaft 321, a main shaft support guide seat 322, a support 323, a latch 324, and an interlocking assembly 325. The rear door 9 is provided with a hook 91 for locking with the latch 324. The main shaft support guide seat 322 and the support 323 are both fixedly installed. One end of the interlocking main shaft 321 passes through the main shaft support guide seat 322 and is connected to the interlocking assembly 325, and the other end passes through the support 323 and is connected to the latch 324. The mechanism section connecting rod 311 is interlocked with the interlocking main shaft 321 through the interlocking assembly 325. The interlocking assembly 325 includes a connecting rod assembly 3251, a second interlocking crank arm 3252, and a cylindrical head 3253. The cylindrical head 3253 is located on the interlocking main shaft 321. At one end of 1, the second interlocking crank arm 3252 is rotatably mounted on the main shaft support guide seat 322. The lower end of the mechanism segment connecting rod 311 is connected to the second interlocking crank arm 3252 through the connecting rod assembly 3251 to convert the up and down movement of the mechanism segment connecting rod 311 into the rotation of the second interlocking crank arm 3252. The second interlocking crank arm 3252 is provided with a notch 3254. When the second interlocking crank arm 3252 rotates to the third position, the projection of the notch 3254 on the axial direction of the interlocking main shaft 321 overlaps with the cylindrical head 3253 to block the passage of the cylindrical head 3253. When the second interlocking crank arm 3252 rotates to the fourth position, the notch 3254 is aligned with the cylindrical head 3253 to allow the cylindrical head 3253 to pass. When the second interlocking crank arm 3252 is in the third position, the projection of the notch 3254 on the axial direction of the interlocking main shaft 321 overlaps with the cylindrical head 3253. That is, the cylindrical head 3253 and the second interlocking crank arm 3252 are located on different planes. The second interlocking crank arm 3252 restricts the cylindrical head 3253 from moving axially along the interlocking main shaft 321. The interlocking main shaft 321 cannot move axially, and the rear door 9 cannot be unlocked, thus effectively preventing accidental opening of the rear door 9. When the second interlocking crank arm 3252 rotates to the fourth position, the notch 3254 is aligned with the cylindrical head 3253, and the cylindrical head 3253 can pass smoothly through the notch 3254, allowing the interlocking main shaft 321 to move freely axially, thereby unlocking the latch 324 and the hook 91. The setting of the notch 3254 makes the blocking and releasing switching of the second interlocking crank arm 3252 on the cylindrical head 3253 more precise, ensuring the reliability of the interlocking action.

[0071] Furthermore, in this embodiment, the locking section 32 also includes an elastic element 326. The elastic element 326 abuts against the rear end of the support 323 and the interlocking main shaft 321. When the rear door 9 is closed, the hook 91 pushes the interlocking main shaft 321 forward to compress the elastic element 326 and pushes the cylindrical head 3253 out of the plane where the second interlocking crank arm 3252 is located. When the rear door 9 is opened, the elastic element 326, under the action of elastic restoring force, pushes the interlocking main shaft 321 backward and pulls the cylindrical head 3253 back to the second interlocking crank arm 32. On the plane where 52 is located, the support 323 is provided with a protruding plate 3231, and the latch 324 is hinged to the interlocking main shaft 321. When the interlocking main shaft 321 moves forward, the protruding plate 3231 abuts against the latch 324 to drive the latch 324 to rotate and lock with the hook 91. The mechanism section 31 also includes a second compression spring 316 and a second compression spring fixing pin. The second compression spring fixing pin is fixedly set on the mechanism section connecting rod 311, and the second compression spring 316 is fitted on the mechanism section connecting rod 311 and abuts between the second compression spring fixing pin and the positioning plate 313. By setting the elastic element 326, when the rear door 9 is opened, the elastic element 326 pushes the interlocking main shaft 321 to move backward (i.e., towards the rear door 9) under the action of elastic restoring force, and pulls the cylindrical head 3253 back to the plane where the second interlocking crank arm 3252 is located. That is, the cylindrical head 3253 moves into the notch 3254. The cylindrical head 3253 and the second interlocking crank arm 3252 are located on the same plane. The rotation of the second interlocking crank arm 3252 is restricted by the cylindrical head 3253, thereby restricting the handle assembly 314 in the lower hole 3152 and preventing accidental operation of the handle assembly 314 when the rear door 9 is open. By setting the convex plate 3231, when the rear door 9 is closed, as the interlocking main shaft 321 moves forward, the convex plate 3231 contacts the latch 324 and applies force, causing the latch 324 to rotate around its hinge point with the interlocking main shaft 321. This achieves automatic locking between the hook 91 and the latch 324, eliminating the need for an additional drive device. This simplifies the overall structure while ensuring the continuity and reliability of the locking process. When the rear door 9 is opened, the interlocking main shaft 321 moves backward, and the latch 324 gradually loses the supporting force of the convex plate 3231, rotating downward under the action of gravity, thereby releasing the lock from the hook 91. By setting a second compression spring 316, when the rear door 9 is closed, the cylindrical head 3253 is pushed out of the plane where the second interlocking crank arm 3252 is located. Under the restoring force of the second compression spring 316, the second compression spring 316 drives the handle assembly 314 to move to the upper hole position 3151, and the second interlocking crank arm 3252 rotates to the first position, thereby realizing the automatic locking of the rear door 9 and improving safety.

[0072] It is worth noting that when the rear door 9 is opened, the second interlocking crank arm 3252 rotates to the fourth position, and the cylindrical head 3253 and the second interlocking crank arm 3252 are on the same plane. The rotation of the second interlocking crank arm 3252 is restricted by the cylindrical head 3253, thereby restricting the handle assembly 314 to the lower hole position 3152. The handle assembly 314 and the connecting rod 311 of the mechanism section cannot move. At this time, due to the obstruction of the second lower pressure baffle 3112, the circuit breaker operating spindle 221 cannot rotate back to the first position, thereby restricting the circuit breaker operating device 2 from performing the tripping operation and locking the circuit breaker operating device 2. This ensures that the circuit breaker can only perform the tripping operation when the rear door 9 is closed and the handle assembly 314 is in the upper hole position 3151, further improving safety.

[0073] Preferably, in this embodiment, the handle hole 315 further includes a reduced diameter section 3153 connecting the upper hole 3151 and the lower hole 3152. The outer periphery of the handle assembly 314 is provided with a reduced diameter portion 3141. When the reduced diameter portion 3141 is aligned with the reduced diameter section 3153, the reduced diameter section 3153 can allow the handle assembly 314 to pass through. The diameter of the reduced diameter section 3153 is slightly smaller than that of the upper hole 3151 and the lower hole 3152, while the diameter of the reduced diameter portion 3141 is adapted to the reduced diameter section 3153. When the handle assembly 314 needs to switch from one hole to another, the operator needs to rotate the handle assembly 314 to make the position of the reduced diameter portion 3141 correspond to that of the reduced diameter section 3153. Only then can the handle assembly 314 slide along the reduced diameter section 3153, reducing the possibility of unintended operation and ensuring that the interlocking device is always under control during use. The cooperation between the reduced diameter section 3153 and the reduced diameter part 3141 forms a mechanical limit for the switching of the handle assembly 314 between the upper and lower holes. Only when the two are precisely aligned can the handle assembly 314 move smoothly, effectively preventing accidental displacement of the handle assembly 314 due to misoperation, and further improving the safety and operational accuracy of the interlocking device. Since the upper hole 3151 is the locked position and the lower hole 3152 is the unlocked position, when the back door 9 needs to be opened, if the handle assembly 314 is not locked in the lower hole 3152, the handle assembly 314 will move up to the upper hole 3151 under the elastic force of the compression spring 16, thereby preventing accidental opening and improving safety.

[0074] The handle assembly 314 includes a handle rod 3142 and a handle loop 3143. The handle rod 3142 is connected to the connecting rod 311 of the mechanism section. The handle loop 3143 is movably fitted onto the handle rod 3142, with the reduced diameter portion 3141 located on the outer periphery of the handle loop 3143. The handle rod 3142 is designed to provide a convenient grip for the operator, and its structural design conforms to ergonomic principles, facilitating the application of force. The movable connection between the handle loop 3143 and the handle rod 3142 ensures both smooth rotation of the handle loop 3143 and a reliable connection between the two, ensuring that the handle loop 3143 will not detach from the handle rod 3142 during operation. During operation, the position of the reduced diameter portion 3141 can be changed by rotating the handle loop 3143, improving the stability and safety of operation.

[0075] Preferably, in this embodiment, the position dual confirmation component 18 is signal-connected to the circuit breaker operating spindle drive component, and the circuit breaker position auxiliary detection component 23 is signal-connected to the three-position spindle drive component 14, thereby realizing mutual electrical interlocking between the three-position switch operating device 1 and the circuit breaker operating device 2. The gas-filled cabinet operating mechanism in this embodiment also has a one-button sequential electric operation function, the specific process of which is as follows: Power supply operation: Initial state: The circuit breaker is in the closed state, and the three-position switch is in the grounded closed state; first, the rear door 9 is closed, and the rear door interlocking device 3 locks the rear door 9; then the circuit breaker is opened, and the circuit breaker switches to the open state. The circuit breaker position auxiliary detection component 23 locks the electric circuit of the circuit breaker operating spindle drive component according to the action signal, and unlocks and connects the electric circuit of the three-position spindle drive component 14; the three-position switch switches to the isolated open state, and the position double confirmation component 18 locks the electric circuit of the circuit breaker operating spindle drive component according to the action signal; the three-position switch switches to the isolated closed state, and the position double confirmation component 18 locks the electric circuit of the three-position spindle drive component 14 according to the action signal, and unlocks and connects the electric circuit of the circuit breaker operating spindle drive component 14; the circuit breaker switches to the closed state, and the circuit breaker position auxiliary detection component 23 locks the electric circuit of the three-position spindle drive component 14 according to the action signal, completing the power supply.

[0076] Power outage procedure: When the circuit breaker switches to the open state, the circuit breaker position auxiliary detection component 23 unlocks and connects the electric circuit of the three-position spindle drive component 14 according to the action signal; when the three-position switch switches to the isolation open state, the position double confirmation component 18 locks the electric circuit of the circuit breaker operating spindle drive component according to the action signal; when the three-position switch switches to the grounding closed state, the position double confirmation component 18 locks the electric circuit of the three-position spindle drive component 14 according to the action signal, and unlocks and connects the electric circuit of the circuit breaker operating spindle drive component; when the circuit breaker switches to the closed state, the circuit breaker position auxiliary detection component 23 locks the electric circuit of the three-position spindle drive component 14 according to the action signal, and the rear door interlocking device 3 unlocks the rear door 9, completing the power outage.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the spirit and technical essence of the present invention. Therefore, any simple modifications, equivalent substitutions, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall still fall within the protection scope of the technical solutions of the present invention.

Claims

1. A gas-filled cabinet operating mechanism, characterized in that: The device includes a three-position switch operating device (1), a circuit breaker operating device (2), and a rear door interlocking device (3). The rear door interlocking device (3) includes a mechanism section (31) and a locking section (32). The mechanism section (31) includes a mechanism section connecting rod (311), an interlocking bracket (312), a positioning plate (313), and a handle assembly (314). The interlocking bracket (312) and the positioning plate (313) are fixedly installed. The upper end of the mechanism section connecting rod (311) passes through the interlocking bracket (312) and is connected to the handle assembly (314), and the lower end passes through the positioning plate (313) and is connected to the locking section (314). 2) Connected, the interlocking bracket (312) is provided with a handle hole (315) for cooperating with the handle assembly (314). The handle hole (315) includes an upper hole (3151) and a lower hole (3152). The connecting rod (311) of the mechanism section is provided with a first pressing baffle (3111) and a second pressing baffle (3112). When the handle assembly (314) is in the upper hole (3151), the locking section (32) locks the rear door (9). When the handle assembly (314) is in the lower hole (3152), the locking section (32) unlocks the rear door (9). The three-position switch operating device (1) is interlocked with the mechanism section connecting rod (311). When the three-position switch is in the isolation closing or isolation opening state, the three-position switch operating device (1) abuts against the bottom of the first pressure baffle (3111) to restrict the mechanism section connecting rod (311) from moving down. The circuit breaker operating device (2) is interlocked with the mechanism section connecting rod (311). When the circuit breaker is in the open state, the circuit breaker operating device (2) abuts against the lower part of the second pressure baffle (3112) to restrict the downward movement of the mechanism section connecting rod (311).

2. The gas-filled cabinet operating mechanism according to claim 1, characterized in that: The three-position switch operating device (1) includes a three-position frame (11), a three-position spindle (12), a three-position interlock assembly (13), a three-position spindle drive assembly (14), and a three-position switch transmission assembly (15). The three-position spindle (12) is rotatably mounted on the three-position frame (11). The three-position spindle drive assembly (14) is connected to the three-position spindle (12) to drive the three-position spindle (12) to rotate. The three-position spindle (12) is connected to the three-position switch through the three-position switch transmission assembly (15) so that the three-position switch can switch between isolation closing, isolation opening, and grounding closing. The three-station interlocking assembly (13) includes a screw (131), a screw assembly (132), a locking plate (133), a guide rod (134), and a tension spring (135). The screw (131) is rotatably mounted on the three-station frame (11) and is connected to the three-station main shaft (12) for transmission. The screw assembly (132) is fitted over the screw (131) and threadedly engaged with the screw (131). The guide rod (134) is mounted on the three-station frame (11). The locking plate (133) is fitted on the guide rod (134) and can move along the guide rod (134). The two ends of the tension spring (135) are respectively connected to the three-station frame (11). 1) Connected to the locking plate (133), when the three-position switch is in the isolation opening or isolation closing working state, under the tension of the tension spring (135), the locking plate (133) retracts to the bottom of the first pressure baffle (3111) to abut against the first pressure baffle (3111) and abut against the interlocking bracket seat (312) to restrict the downward movement of the mechanism section connecting rod (311). When the three-position switch is in the grounding closing state, the screw assembly (132) moves to the locking plate (133) and pushes the locking plate (133) to move out of the bottom of the first pressure baffle (3111) to release the restriction on the movement of the mechanism section connecting rod (311).

3. The gas-filled cabinet operating mechanism according to claim 2, characterized in that: The circuit breaker operating device (2) includes a housing (21), a circuit breaker operating spindle assembly (22), and a circuit breaker operating spindle drive assembly. The circuit breaker operating spindle assembly (22) includes a circuit breaker operating spindle (221) and a switching crank arm (222) mounted on the circuit breaker operating spindle (221). The circuit breaker operating spindle drive assembly is connected to the circuit breaker operating spindle (221) to drive the circuit breaker operating spindle (221) to rotate. The circuit breaker operating spindle (221) is rotatably mounted in the housing (21). The circuit breaker operating spindle (221) is equipped with a rear door interlock. When the handle assembly (314) is in the upper hole position (3151) and the circuit breaker is in the open state, the circuit breaker operating spindle (221) rotates to the first position, and the rear door interlocking baffle (223) abuts against the lower part of the second lower baffle (3112) to restrict the downward movement of the mechanism section connecting rod (311). When the circuit breaker is in the closed state, the circuit breaker operating spindle (221) rotates to the second position, and the rear door interlocking baffle (223) rotates to separate from the second lower baffle (3112) to release the restriction on the downward movement of the mechanism section connecting rod (311).

4. The gas-filled cabinet operating mechanism according to claim 3, characterized in that: The connecting rod (311) of the mechanism section is also provided with a tripping baffle (3113), and the housing (21) is provided with a manual operation tripping button plate (212). When the handle assembly (314) is located in the lower hole position (3152), the tripping baffle (3113) moves to the rear side of the manual operation tripping button plate (212) to block the pressing of the manual operation tripping button plate (212).

5. The gas-filled cabinet operating mechanism according to claim 3, characterized in that: The three-position switch operating device (1) further includes an operating panel (16) and a small valve assembly (17). The small valve assembly (17) includes a valve plate (171) and a valve handle (172) disposed on the valve plate (171). The valve plate (171) is disposed between the operating panel (16) and the three-position frame (11). The operating panel (16) is provided with a valve handle hole (161), a first isolation operating hole (162), and a first grounding operating hole (163). The valve plate (171) is provided with a second isolation operating hole (1712) and a second grounding operating hole (1713). The three-position frame (11) is provided with a third isolation operating hole (111) and a third grounding operating hole (113). The valve handle hole (161) includes a grounding switch position (1611), an isolating switch position (1612), and a central hole position (1613) connecting the grounding switch position (1611) and the isolating switch position (1612). When the valve handle (172) moves to the grounding switch position (1611), the second grounding operation hole (1713) connects the first grounding operation hole (163) and the third grounding operation hole (112). When the valve handle (172) moves to the isolating switch position (1612), the second isolating operation hole (1712) connects the first isolating operation hole (162) and the third isolating operation hole (111).

6. The gas-filled cabinet operating mechanism according to claim 5, characterized in that: The gas-filled switchgear operating mechanism also includes a three-position interlocking device (4) with a circuit breaker. The three-position interlocking device (4) with a circuit breaker includes an interlocking frame (41), a top rod (42), a first interlocking crank arm (43), a push rod (44), a limit clamp (45), a guide plate (46), a first compression spring (47), and a first compression spring fixing pin (48). The lower end of the valve plate (171) is provided with a first cooperating rod (1711). The circuit breaker operating spindle (22) 1) A second mating rod (2211) is provided on the top. The interlocking frame (41) and the guide plate (46) are both fixedly installed. The first compression spring fixing pin (48) is fixedly installed on the top rod (42). The first compression spring (47) is fitted on the top rod (42) and abuts between the guide plate (46) and the first compression spring fixing pin (48). The upper end of the top rod (42) passes through the guide plate (46) and cooperates with the first interlocking crank arm (43), and the lower end passes through the guide plate. (46) Cooperating with the second cooperating rod (2211), the upper end of the top rod (42) is provided with a first pin, the rear end of the push rod (44) is provided with a second pin, the first interlocking crank arm (43) is rotatably mounted on the interlocking frame (41), the first interlocking crank arm (43) is provided with a first strip groove and a second strip groove, the first pin is slidably mounted in the first strip groove, the second pin is slidably mounted in the second strip groove, the push rod (44) is movably mounted on the interlocking frame (41), the front end of the push rod (44) is provided with a limiting groove (441), the limiting clamp (45) includes two clamping arms, the two clamping arms are respectively hinged to the interlocking frame (41), and the hinge point is located on both sides of the push rod (44), one side of the clamping arm is provided in the limiting groove (441), the first cooperating rod (1711) is located between the two clamping arms, under the elastic force of the first compression spring (47), the two clamping arms are in the closed state. When the circuit breaker is in the closed state, the circuit breaker operating spindle (221) rotates to the second position, and the second cooperating rod (2211) rotates to below the top rod (42) to restrict the top rod (42) from moving downward. The two clamping arms cannot open to restrict the movement of the valve plate (171). When the circuit breaker is in the open state, the circuit breaker operating spindle (221) rotates to the first position, the second cooperating rod (2211) rotates to separate from the top rod (42) to release the restriction on the movement of the top rod (42), and the two clamping arms can open to release the restriction on the movement of the valve plate (171).

7. The gas-filled cabinet operating mechanism according to claim 3, characterized in that: The circuit breaker operating device (2) further includes a circuit breaker position auxiliary detection component (23). The circuit breaker position auxiliary detection component (23) is signal connected to the three-position spindle drive component (14). The circuit breaker position auxiliary detection component (23) is used to detect the working status of the circuit breaker. When the circuit breaker position auxiliary detection component (23) detects that the circuit breaker is in the closed state, it controls the locking of the electric circuit of the three-position spindle drive component (14). When the circuit breaker position auxiliary detection component (23) detects that the circuit breaker is in the open state, it controls the unlocking of the electric circuit of the three-position spindle drive component (14).

8. The gas-filled cabinet operating mechanism according to claim 3, characterized in that: The lower end of the interlocking bracket (312) is provided with a connecting rod limit switch (3121), and the connecting rod (311) of the mechanism section is provided with a switch plate (3114) that cooperates with the connecting rod limit switch (3121). The connecting rod limit switch (3121) is signal connected to the circuit breaker operating spindle drive assembly. When the handle assembly (314) is in the lower hole position (3152), the connecting rod limit switch (3121) controls the locking of the electric tripping circuit of the circuit breaker operating spindle drive assembly.

9. The gas-insulated switchgear operating mechanism according to any one of claims 1 to 8, characterized in that: The locking section (32) includes an interlocking main shaft (321), a main shaft support guide seat (322), a support (323), a latch (324), and an interlocking assembly (325). The rear door (9) is provided with a hook (91) for locking with the latch (324). The main shaft support guide seat (322) and the support (323) are both fixedly installed. One end of the interlocking main shaft (321) passes through the main shaft support guide seat (322) and is connected to the interlocking assembly (325), and the other end passes through the support (323) and is connected to the latch (324). The connecting rod (311) of the mechanism section is interlocked with the interlocking main shaft (321) through the interlocking assembly (325). The interlocking assembly (325) includes a connecting rod assembly (3251), a second interlocking crank arm (3252), and a cylindrical head (3253). The cylindrical head (3253) is located at one end of the interlocking main shaft (321). The second interlocking crank arm (3252) is rotatably mounted on the main shaft support guide seat (322). The lower end of the mechanism segment connecting rod (311) is connected to the second interlocking crank arm (3252) through the connecting rod assembly (3251) to convert the up-and-down movement of the mechanism segment connecting rod (311) into the rotation of the second interlocking crank arm (3252). The second interlocking crank arm (3252) is provided with a notch (3254). When the handle assembly (314) is in the upper hole position (3151), the second interlocking crank arm (3252) rotates to the third position, and the projection of the notch (3254) on the interlocking spindle (321) overlaps with the cylindrical head (3253) to block the passage of the cylindrical head (3253). When the handle assembly (314) is in the lower hole position (3152), the second interlocking crank arm (3252) rotates to the fourth position, and the notch (3254) aligns with the cylindrical head (3253) to allow the cylindrical head (3253) to pass through.

10. The gas-filled cabinet operating mechanism according to claim 9, characterized in that: The locking section (32) also includes an elastic element (326), which abuts against the rear end of the support (323) and the interlocking main shaft (321). When the rear door (9) is closed, the hook (91) pushes the interlocking main shaft (321) forward to compress the elastic element (326) and pushes the cylindrical head (3253) out of the plane where the second interlocking crank arm (3252) is located. When the rear door (9) is opened, the elastic element (326) pushes the interlocking main shaft (321) backward under the action of elastic restoring force and pulls the cylindrical head (3253) back to the plane where the second interlocking crank arm (3252) is located. The support (323) is provided with a protruding plate (3231), and the latch (324) is hinged to the interlocking main shaft (321). When the interlocking main shaft (321) moves forward, the protruding plate (3231) abuts against the latch (324) to drive the latch (324) to rotate and lock with the hook (91). The mechanism segment (31) also includes a second compression spring (316) and a second compression spring fixing pin. The second compression spring fixing pin is fixedly mounted on the mechanism segment connecting rod (311). The second compression spring (316) is fitted onto the mechanism segment connecting rod (311) and abuts against the second compression spring fixing pin and the positioning plate (313).

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