Rigging type large-diameter vacuum valve

Abstract

The invention relates to the technical field of vacuum valves, in particular to a rigging type large-diameter vacuum valve which comprises a valve body, the valve body is provided with a valve body used for gas to pass through, a valve element used for blocking the valve body is arranged in the valve body, vertically-arranged limiting guide rails are arranged on the two sides of the valve element, and the limiting guide rails are fixedly connected with the valve body. According to the technical scheme, the lifting device is used for replacing a traditional traveling crane trolley, conversion from a translation type valve body to a lifting type valve body is achieved, the valve body is changed from a horizontal type to a vertical type, space is utilized, therefore, the structural size is small, excessive space in the valve body cannot be occupied, the overall size of the valve body is reduced, and the service life of the valve body is prolonged. And the locking mechanism is mounted on the sealing flange and is not positioned in the valve body, so that the size of the valve body is reduced, the processing cost and the processing difficulty of the valve body are reduced, and the mounting difficulty is also reduced.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum valves, and in particular to a rigging type large-caliber vacuum valve. Background Art

[0002] Vacuum valves are usually used to control the on-off of pipelines. They are generally divided into medium and large vacuum valves (diameter 3 meters and above) and small vacuum valves. Since large vacuum valves have a larger diameter, the valve core used to seal the valve is usually heavier, so the valve core of a large vacuum valve is very inconvenient to move, and the sealing of the valve core to the valve is more difficult to ensure.

[0003] On the one hand, in order to ensure the sealing of the valve core to the valve, a multi-link rigid structure is usually arranged in traditional large vacuum valves to pre-tighten the valve core and the valve to ensure the sealing. On the other hand, a driving device is also arranged in the valve body to drive the valve core to move horizontally. In order to ensure sufficient driving force, the driving device usually adopts the structure of a crane trolley. The existence of the multi-link rigid structure and the crane trolley makes the volume of the valve body larger, so that when the entire valve body lies horizontally on the ground, the valve body occupies a larger area. The larger volume and the larger area of ​​the valve body make its processing cost and processing difficulty higher, and it is also difficult to install.

[0004] Therefore, it is necessary to propose a rigging type large-diameter vacuum valve, which can reduce the volume and floor space of the valve body, reduce the processing cost and processing difficulty, and reduce the installation difficulty while ensuring the movement of the valve core and the sealing of the valve core to the valve. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing large vacuum valve occupies a large area, and a rigging type large-diameter vacuum valve is provided.

[0006] The technical solution of the present invention is: A rigging type large-caliber vacuum valve, comprising a valve body, a valve for gas to pass through the valve body, a valve core for blocking the valve, vertically placed limit rails are provided on both sides of the valve core, the limit rails are fixedly connected to the valve body, each limit rail is installed with a running device and a pre-tightening device, a lifting device is installed on the top of the valve body, the lifting device drives the valve core to rise and fall along the limit rails, and the running device moves along the limit rails to assist the lifting device in lifting the valve core; The pre-tightening device includes a crossbeam, a sliding mechanism and a push plate. The crossbeam is placed perpendicular to the valve core and is fixedly connected to the walking device. The sliding mechanism is slidably connected to the crossbeam and is fixedly connected to the push plate. The push plate is fixedly connected to the valve core. The sliding mechanism can move along the crossbeam to drive the valve core to approach or move away from the valve. The valve body is fixedly connected with a sealing flange, the valve is located in the sealing flange, a locking mechanism is provided on the sealing flange, when the valve core is close to the valve, it fits with the sealing flange, and the locking mechanism locks the valve core and the sealing flange along the axial direction of the sealing flange.

[0007] Furthermore, the sliding mechanism includes a first driving device and a support frame, sliders are provided at both ends of the support frame, and sliding grooves for accommodating the sliders are provided on both sides of the beam. When the first driving device drives the support frame to move along the beam, the slider slides along the sliding groove.

[0008] Furthermore, a multi-joint connection mechanism is provided between the push plate and the support frame, one end of the multi-joint connection mechanism is fixedly connected to the push plate, and the other end of the multi-joint connection mechanism is rotatably connected to the support frame.

[0009] Furthermore, the multi-joint connection mechanism includes a first joint, a second joint and a joint arm located between the first joint and the second joint, the joint arm is rotatably connected to the first joint and the second joint respectively, the first joint is rotatably connected to the support frame through a first pin shaft, the first joint is rotatably connected to the joint arm through a second pin shaft, the second joint is rotatably connected to the joint arm through a third pin shaft, and the second joint is fixedly connected to the push plate.

[0010] Furthermore, the axis of the first pin is parallel to the axis of the valve core, the axis of the second pin is perpendicular to the axis of the valve core, and the axis of the third pin is parallel to the axis of the second pin.

[0011] Furthermore, each pre-tightening device is provided with at least two cross beams, and the cross beams are parallel to each other.

[0012] Furthermore, at least one push plate is respectively provided at both ends of the support frame, and a multi-joint connection mechanism is installed at each end of the support frame.

[0013] Furthermore, the lifting device includes a second driving device and a drum, a steel wire rope is wound around the drum, and one end of the steel wire rope is fixedly connected to the valve core.

[0014] Furthermore, the walking device includes a third driving device, a gear and a protective shell, the protective shell is slidably connected to the limiting guide rail, a transmission tooth meshing with the gear is installed on the limiting guide rail, the third driving device and the gear are placed in the protective shell, and the third driving device drives the gear to mesh with the transmission tooth for transmission, thereby realizing the movement of the protective shell along the limiting guide rail; Rail clamps are installed at both ends of the walking device, and the rail clamps include a shell, a fourth driving device is arranged on the outside of the shell, a first clamping plate and a second clamping plate parallel to each other are arranged inside the shell, the first clamping plate and the second clamping plate are both rotatably connected to the shell, and one end of the shell is provided with two claws arranged opposite to each other, the first clamping plate is fixedly connected to one of the claws, and the second clamping plate is fixedly connected to the other claw; A screw rod is provided in the shell, and the fourth driving device drives the screw rod to rotate. The first clamping plate is provided with a first nut, and the second clamping plate is provided with a second nut. The screw rod is threadedly connected to the first nut and the second nut respectively. The screw directions of the threads of the first nut and the second nut are opposite. The screw rod drives the first clamping plate and the second clamping plate to approach or move away from each other, thereby realizing the opening or closing of the two claws.

[0015] Furthermore, the locking mechanism is evenly distributed in a ring shape around the axis of the sealing flange. The locking mechanism includes a claw, an ear seat and a telescopic cylinder. The ear seat is fixedly connected to the sealing flange. The ear seat is provided with a U-shaped groove. The claw is provided with a convex head. When the telescopic cylinder is extended and retracted, the convex head can be driven to slide in the U-shaped groove, thereby realizing the rotation of the claw relative to the ear seat.

[0016] The present invention relates to a rigging type large-diameter vacuum valve, wherein the lifting device is used to lift the valve core, thereby controlling the opening and closing of the valve, and the walking devices on both sides of the valve core can make the valve core always lift and lower along the limit guide rail during the lifting process, thereby controlling the moving trajectory of the valve core and ensuring the position accuracy of the valve core during movement. At the same time, the walking device can also drive the valve core to move along the limit guide rail, thereby playing an auxiliary role in the lifting device, sharing the lifting pressure for the lifting device, which is beneficial to controlling the power of the lifting device, thereby reducing the volume of the lifting device and further reducing the overall volume of the valve body. When the lifting mechanism lifts the valve core to the sealing flange, the coarse adjustment of the valve core position is achieved, and the initial alignment with the sealing flange is achieved. The walking device drives the valve core to further align with the sealing flange by moving along the limit guide rail, thereby achieving fine adjustment of the valve core position. After that, the sliding mechanism can drive the push plate to move along the crossbeam to push the valve core to fit the sealing flange. The sliding mechanism continues to apply a pre-tightening force to the valve core, thereby making the valve core fit the sealing flange more closely. To ensure the air tightness between the valve core and the sealing flange, when the valve core and the sealing flange are fitted in place, the locking mechanism locks the valve core and the sealing flange together in the axial direction of the sealing flange to prevent the valve core from loosening, resulting in separation from the sealing flange and affecting the air tightness. Compared with the traditional technology, the technical solution uses a lifting device to replace the traditional traveling crane trolley to realize the transformation from a translational valve body to a lifting valve body. The valve body is changed from a horizontal type to a vertical type, which utilizes space and saves ground space. The lifting device cooperates with the walking device to realize the lifting and lowering of the valve core, the pre-tightening device realizes the pre-tightening of the valve core, and the locking mechanism realizes the locking of the valve core and the sealing flange. Since the walking device and the pre-tightening device are both installed on the limiting guide rail, the structural volume is small and will not occupy too much space inside the valve body, which is beneficial to reducing the overall volume of the valve body. The locking mechanism is installed on the sealing flange and is not located in the valve body, which is also beneficial to reducing the volume of the valve body, reducing the processing cost and difficulty of the valve body, and also reducing the installation difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a three-dimensional Figure 1; Figure 2 The present invention is a three-dimensional Figure 2 ; Figure 3 It is the internal structure diagram of the present invention; Figure 4 For the present invention Figure 3 A partial enlarged view of the middle part; Figure 5 A three-dimensional diagram of the rail clamp of the present invention; Figure 6 This is a structural reference diagram of the rail clamp of the present invention; Figure 7 This is a structural diagram of the locking mechanism of the present invention.

[0018] Figure numerals: 1, valve body; 2, valve core; 3, limit guide rail; 4, walking device; 5, pre-tightening device; 6, lifting device; 7, crossbeam; 8, sliding mechanism; 9, push plate; 10, sealing flange; 11, locking mechanism; 12, first driving device; 13, support frame; 14, slider; 15, sliding groove; 16, multi-joint connection mechanism; 17, first joint; 18, second joint; 19, joint arm; 20, first pin shaft; 21, second pin shaft; 22 , the third pin shaft; 23, the second driving device; 24, the drum; 25, the wire rope; 26, the third driving device; 27, the gear; 28, the protective shell; 29, the track clamp; 30, the fourth driving device; 31, the first clamping plate; 32, the second clamping plate; 33, the first claw; 34, the screw rod; 35, the first nut; 36, the second nut; 37, the second claw; 38, the ear seat; 39, the telescopic cylinder; 40, the U-shaped slide; 41, the boss; 42, the reinforcing rib. DETAILED DESCRIPTION

[0019] In order to make the technical means, technical features, invention objectives and technical effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific illustrations.

[0020] Embodiment 1: like Figure 1 and Figure 2 As shown, this embodiment provides a rigging type large-caliber vacuum valve, including a valve body 1, the valve body 1 is provided with a valve for gas to pass through, a valve core 2 for blocking the valve is provided in the valve body 1, vertically placed limit rails 3 are provided on both sides of the valve core 2, the limit rails 3 are fixedly connected to the valve body 1 by screws, each limit rail 3 is installed with a walking device 4 and a pre-tightening device 5, a lifting device 6 is installed on the top of the valve body 1, and the lifting device 6 drives the valve core 2 to rise and fall along the limit rails 3, as shown in FIG. Figure 3 and Figure 4As shown, the walking device 4 moves along the limit guide rail 3 to assist the lifting device 6 in lifting the valve core 2. The pre-tightening device 5 includes a crossbeam 7, a sliding mechanism 8 and a push plate 9. The crossbeam 7 is placed perpendicular to the valve core 2 and is fixedly connected to the walking device 4 with screws. The sliding mechanism 8 is slidably connected to the crossbeam 7 and is fixedly connected to the push plate 9 with screws. The push plate 9 is connected to the valve core 2. The sliding mechanism 8 can move along the crossbeam 7 to drive the valve core 2 to approach or move away from the valve. The valve body 1 is fixedly connected with a sealing flange 10 with screws. The valve is located at the sealing flange 10. 0, a locking mechanism 11 is provided on the sealing flange 10, and the valve core 2 fits with the sealing flange 10 when the valve core 2 is close to the valve, and the locking mechanism 11 locks the valve core 2 and the sealing flange 10 along the axial direction of the sealing flange 10. Preferably, a reinforcing rib 42 is provided on the valve body 1, and the reinforcing rib 42 is welded on the valve body 1 to improve the structural strength of the valve body 1. Preferably, the valve core 2 is a circular cover plate with one side convex and the other side concave, and a cross-shaped reinforcing rib 42 is provided on the concave side of the cover plate to increase the structural strength of the valve core 2.

[0021] Preferably, the sliding mechanism 8 includes a first driving device 12 and a support frame 13. The first driving device 12 is fixedly connected to the cross beam 7 with screws. Slide blocks 14 are fixedly connected with screws at both ends of the support frame 13. Sliding grooves 15 for accommodating the sliders 14 are provided on both sides of the cross beam 7. When the first driving device 12 drives the support frame 13 to move along the cross beam 7, the slider 14 slides along the sliding groove 15. Preferably, rollers are installed on the slider 14. When the slider 14 slides in the sliding groove 15, the rollers contact the sliding groove 15 and roll relative to the sliding groove 15. The rollers can reduce the friction between the slider 14 and the sliding groove 15 to ensure smoothness of the mechanism. The first driving device 12 can be a cylinder, an electric cylinder, or a hydraulic cylinder.

[0022] Preferably, a multi-joint connection mechanism 16 is provided between the push plate 9 and the support frame 13, one end of the multi-joint connection mechanism 16 is fixedly connected to the push plate 9, and the other end of the multi-joint connection mechanism 16 is rotatably connected to the support frame 13. Specifically, the multi-joint connection mechanism 16 includes a first joint 17, a second joint 18, and a joint arm 19 located between the first joint 17 and the second joint 18, the joint arm 19 is rotatably connected to the first joint 17 and the second joint 18 respectively, the first joint 17 is rotatably connected to the support frame 13 through a first pin 20, and the first joint 17 is rotatably connected to the joint arm 19 through a second pin 21. The second joint 18 is rotatably connected to the joint arm 19 through the third pin shaft 22, and the second joint 18 is fixedly connected to the push plate 9 by screws. Preferably, the axis of the first pin shaft 20 is parallel to the axis of the valve core 2, the axis of the second pin shaft 21 is perpendicular to the axis of the valve core 2, and the axis of the third pin shaft 22 is parallel to the axis of the second pin shaft 21. Since the valve core 2 will generate a large momentum at the moment of starting and stopping due to the large mass of the valve core 2, in order to reduce the damage caused by the momentum of the valve core 2 to the walking mechanism and the sliding mechanism 8, the use of a multi-joint connection structure can effectively reduce the impact of the valve core 2 on each motion mechanism.

[0023] Preferably, each pre-tightening device 5 is provided with at least two cross beams 7, and the cross beams 7 are parallel to each other. Preferably, at least one push plate 9 is provided at each end of the support frame 13, and a multi-joint connection mechanism 16 is installed at each end of the support frame 13. Multiple cross beams 7 can ensure the stability of the mechanism and balance in the hand. There is a push plate 9 at both ends of the support frame 13, and there are at least two push plates 9 on each side of the valve core 2, which can increase the force area, improve the stability of the valve core 2 during lifting and pre-tightening, and ensure the sealing accuracy of the valve core 2.

[0024] Preferably, the lifting device 6 includes a second driving device 23 and a drum 24, a steel wire rope 25 is wound around the drum 24, one end of the steel wire rope 25 is screw-fixedly connected to the valve core 2, preferably, the second driving device 23 is a motor and is screw-fixed in the valve body 1.

[0025] Preferably, Figure 5 and Figure 6As shown, the walking device 4 includes a third driving device 26, a gear 27 and a protective shell 28. The protective shell 28 is slidably connected to the limiting guide rail 3. The limiting guide rail 3 is provided with a transmission tooth meshing with the gear 27. As an optional method, the gear 27 can also be replaced by a track wheel. At the same time, the limiting guide rail 3 can directly contact the track wheel, and there is no need to install a transmission tooth. The third driving device 26 and the gear 27 are placed in the protective shell 28. The third driving device 26 drives the gear 27 to mesh with the transmission tooth for transmission, thereby realizing the movement of the protective shell 28 along the limiting guide rail 3. The third driving device 26 is preferably a motor. Rail clamps 29 are installed at both ends of the walking device 4. The rail clamp 29 includes a shell, and a fourth driving device 30 is provided on the outer side of the shell. The fourth driving device 30 is preferably a motor. The first clamping plate 31 and the second clamping plate 32 are parallel to each other, and the first clamping plate 31 and the second clamping plate 32 are both rotatably connected to the shell. One end of the shell is provided with two claws 33 arranged opposite to each other. The first clamping plate 31 is fixedly connected to one of the claws 33 by screws, and the second clamping plate 32 is fixedly connected to the other claw 33 by screws. A screw rod 34 is provided in the shell, and the fourth driving device 30 drives the screw rod 34 to rotate. The first clamping plate 31 is provided with a first nut 35, and the second clamping plate 32 is provided with a second nut 36. The screw rod 34 is threadedly connected to the first nut 35 and the second nut 36 respectively, and the thread spiral directions of the first nut 35 and the second nut 36 are opposite. The screw rod 34 drives the first clamping plate 31 and the second clamping plate 32 to approach or move away from each other, thereby realizing the opening or closing of the two claws 33.

[0026] Preferably, the first nut 35 is rotatably connected to the first clamping plate 31, and the second nut 36 is rotatably connected to the second clamping plate 32. Preferably, a pin is provided between the first nut 35 and the first clamping plate 31, and the first nut 35 is flipped relative to the first clamping plate 31 through the pin. The pin is located on both sides of the first nut 35, and the pin is screw-fixedly connected to the first nut 35. Preferably, a pin is provided between the second nut 36 and the second clamping plate 32, and the second nut 36 is flipped relative to the second clamping plate 32 through the pin. The pin is located on both sides of the second nut 36, and the pin is screw-fixedly connected to the second nut 36. The pins are fixedly connected. When the lead screw rotates, causing the first clamping plate 31 and the second clamping plate 32 to move closer to or away from each other, the first clamping plate 31 and the second clamping plate 32 will tilt, causing the angles between the lead screw 34 and the first clamping plate 31, and between the lead screw 34 and the second clamping plate 32 to change. The pin shaft can be adjusted as the first clamping plate 31 and the second clamping plate 32 tilt, so that the first nut 35 can rotate a certain angle relative to the first clamping plate 31, and the second nut 36 can rotate a certain angle relative to the second clamping plate 32, thereby ensuring stable operation of the mechanism.

[0027] Preferably, the rotational connection between the first clamping plate 31 and the shell, the rotational connection between the second clamping plate 32 and the shell, and the two claws 33 are all located at the same end of the shell, and the screw rod 34, the first nut 35 and the second nut 36 are located at the other end of the shell. Preferably, the fourth drive device 30 includes a motor and a coupling, the motor output shaft is screw-fixedly connected to one end of the coupling, and the other end of the coupling is screw-fixedly connected to the screw rod 34, and the motor transmits power to the screw rod 34 through the coupling. Preferably, the screw rod 34 passes through the shell and is rotationally connected to the shell. The shell and the screw rod 34 can be rotationally connected by a bearing, or can achieve relative rotation by sliding friction. Preferably, the screw rod 34 passes through the first clamping plate 31 and the second clamping plate 32 When in use, the first clamping plate 31 and the second clamping plate 32 are provided in the shell. Since the screw directions of the first nut 35 and the second nut 36 are opposite, when the fourth driving device 30 drives the screw rod 34 to rotate, the first nut 35 and the second nut 36 will move along the axial direction of the screw rod 34, and the moving directions are opposite, thereby driving the first clamping plate 31 and the second clamping plate 32 to approach or move away from each other. The two claws 33 are opened and closed under the drive of the first clamping plate 31 and the second clamping plate 32. The guide rail is released when the claws 33 are opened, and the guide rail is clamped when the claws 33 are closed, thereby clamping the guide rail. Even if it is impacted, the valve core 2 will not shake, and the walking device 4 will not move, thereby ensuring the stability of the mechanism.

[0028] Preferably, Figure 7 As shown, the locking mechanism 11 is evenly distributed in a ring shape around the axis of the sealing flange 10. The locking mechanism 11 includes a claw 33, an ear seat 38 and a telescopic cylinder 39. The ear seat 38 is fixedly connected to the sealing flange 10 with screws. The ear seat 38 is provided with a U-shaped groove 40. The claw 33 is provided with a convex head 41. When the telescopic cylinder 39 is extended and retracted, the convex head 41 can be driven to slide in the U-shaped groove 40, thereby realizing the rotation of the claw 33 relative to the ear seat 38. The telescopic cylinder 39 can be a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

[0029] During operation, the lifting device 6 is used to lift the valve core 2, thereby controlling the opening and closing of the valve, and the walking devices 4 on both sides of the valve core 2 can make the valve core 2 always lift and lower along the limit guide rail 3 during the lifting process, thereby controlling the moving trajectory of the valve core 2 and ensuring the position accuracy of the valve core 2 during movement. At the same time, the walking device 4 can also drive the valve core 2 to move along the limit guide rail 3, thereby playing an auxiliary role in the lifting device 6, sharing the lifting pressure for the lifting device 6, and being conducive to controlling the power of the lifting device 6, thereby reducing the volume of the lifting device 6, and further reducing the valve body 1. When the lifting mechanism lifts the valve core 2 to the sealing flange 10, the coarse adjustment of the position of the valve core 2 is achieved, and the valve core 2 is initially aligned with the sealing flange 10. The walking device 4 drives the valve core 2 to be further aligned with the sealing flange 10 by moving along the limit guide rail 3, and the fine adjustment of the position of the valve core 2 is achieved. After that, the sliding mechanism 8 can drive the push plate 9 to move along the crossbeam 7 to push the valve core 2 to fit the sealing flange 10. The sliding mechanism 8 continues to apply a pre-tightening force to the valve core 2, so that the valve core 2 fits the sealing flange 10 more closely, ensuring that the valve core 2 is aligned with the sealing flange 10. The airtightness between the flanges 10 is improved. When the valve core 2 and the sealing flange 10 are fitted in place, the locking mechanism 11 locks the valve core 2 and the sealing flange 10 together in the axial direction of the sealing flange 10 to prevent the valve core 2 from loosening and causing separation from the sealing flange 10, thereby affecting the airtightness. Compared with the traditional technology, the present technical solution uses a lifting device 6 to replace the traditional overhead crane trolley to realize the transformation from a translational valve body 1 to a lifting valve body 1. The valve body 1 is changed from a horizontal type to a vertical type, which utilizes space and saves the occupation of ground space. The lifting device 6 cooperates with The walking device 4 realizes the lifting and lowering of the valve core 2, the pre-tightening device 5 realizes the pre-tightening of the valve core 2, and the locking mechanism 11 realizes the locking of the valve core 2 and the sealing flange 10. Since the walking device 4 and the pre-tightening device 5 are both installed on the limiting guide rail 3, the structural volume is relatively small and will not occupy too much space inside the valve body 1, which is beneficial to reducing the overall volume of the valve body 1. The locking mechanism 11 is installed on the sealing flange 10 and is not located in the valve body 1, which is also beneficial to reducing the volume of the valve body 1, reducing the processing cost and processing difficulty of the valve body 1, and also reducing the installation difficulty.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent application scope of the present invention should belong to the technical scope of the present invention.

Claims

1. A rigging type large-caliber vacuum valve, comprising a valve body (1), the valve body (1) being provided with a valve for gas to pass through, and a valve core (2) being provided inside the valve body (1) for blocking the valve, characterized in that: Vertically placed limit rails (3) are provided on both sides of the valve core (2). The limit rails (3) are fixedly connected to the valve body (1). Each limit rail (3) is equipped with a running device (4) and a pre-tightening device (5). A lifting device (6) is installed on the top of the valve body (1). The lifting device (6) drives the valve core (2) to rise and fall along the limit rails (3). The running device (4) moves along the limit rails (3) to assist the lifting device (6) in lifting and lowering the valve core (2). The preload device (5) comprises a crossbeam (7), a sliding mechanism (8) and a push plate (9); the crossbeam (7) is placed perpendicular to the valve core (2) and is fixedly connected to the walking device (4); the sliding mechanism (8) is slidably connected to the crossbeam (7) and is fixedly connected to the push plate (9); the push plate (9) is fixedly connected to the valve core (2); the sliding mechanism (8) can move along the crossbeam (7) to drive the valve core (2) to move closer to or farther away from the valve; The valve body (1) is fixedly connected to a sealing flange (10), the valve is located in the sealing flange (10), a locking mechanism (11) is provided on the sealing flange (10), and the valve core (2) is fitted with the sealing flange (10) when the valve core (2) is close to the valve, and the locking mechanism (11) locks the valve core (2) and the sealing flange (10) along the axial direction of the sealing flange (10).

2. The rigging type large-diameter vacuum valve according to claim 1, characterized in that: The sliding mechanism (8) comprises a first driving device (12) and a support frame (13); sliding blocks (14) are provided at both ends of the support frame (13); sliding grooves (15) for accommodating the sliding blocks (14) are provided at both sides of the cross beam (7); when the first driving device (12) drives the support frame (13) to move along the cross beam (7), the sliding blocks (14) slide along the sliding grooves (15).

3. The rigging type large-diameter vacuum valve according to claim 2, characterized in that: A multi-joint connection mechanism (16) is provided between the push plate (9) and the support frame (13); one end of the multi-joint connection mechanism (16) is fixedly connected to the push plate (9), and the other end of the multi-joint connection mechanism (16) is rotatably connected to the support frame (13).

4. The rigging type large-diameter vacuum valve according to claim 3, characterized in that: The multi-joint connection mechanism (16) comprises a first joint (17), a second joint (18) and a joint arm (19) located between the first joint (17) and the second joint (18); the joint arm (19) is rotatably connected to the first joint (17) and the second joint (18), respectively; the first joint (17) is rotatably connected to the support frame (13) via a first pin shaft (20); the first joint (17) is rotatably connected to the joint arm (19) via a second pin shaft (21); the second joint (18) is rotatably connected to the joint arm (19) via a third pin shaft (22); and the second joint (18) is fixedly connected to the push plate (9).

5. The rigging type large-diameter vacuum valve according to claim 4, characterized in that: The axis of the first pin shaft (20) is parallel to the axis of the valve core (2), the axis of the second pin shaft (21) is perpendicular to the axis of the valve core (2), and the axis of the third pin shaft (22) is parallel to the axis of the second pin shaft (21).

6. The rigging type large-diameter vacuum valve according to claim 1, characterized in that: Each pre-tightening device (5) is provided with at least two cross beams (7), and the cross beams (7) are parallel to each other.

7. The rigging type large-diameter vacuum valve according to claim 2, characterized in that: At least one push plate (9) is respectively provided at both ends of the support frame (13), and a multi-joint connection mechanism (16) is installed at each end of the support frame (13).

8. The rigging type large-diameter vacuum valve according to claim 1, characterized in that: The lifting device (6) comprises a second driving device (23) and a drum (24), a steel wire rope (25) is wound around the drum (24), and one end of the steel wire rope (25) is fixedly connected to the valve core (2).

9. The rigging type large-diameter vacuum valve according to claim 1, characterized in that: The walking device (4) comprises a third driving device (26), a gear (27) and a protective shell (28); the protective shell (28) is slidably connected to the limiting guide rail (3); a transmission tooth meshing with the gear (27) is installed on the limiting guide rail (3); the third driving device (26) and the gear (27) are arranged in the protective shell (28); the third driving device (26) drives the gear (27) to mesh with the transmission tooth for transmission, thereby realizing the movement of the protective shell (28) along the limiting guide rail (3); Rail clamps (29) are installed at both ends of the walking device (4), and the rail clamp (29) comprises a shell, a fourth driving device (30) is arranged outside the shell, a first clamping plate (31) and a second clamping plate (32) are arranged in parallel with each other inside the shell, the first clamping plate (31) and the second clamping plate (32) are both rotatably connected to the shell, and one end of the shell is provided with two first clamping claws (33) arranged opposite to each other, the first clamping plate (31) is fixedly connected to one of the first clamping claws (33), and the second clamping plate (32) is fixedly connected to the other first clamping claw (33); A screw rod (34) is provided in the housing, the fourth driving device (30) drives the screw rod (34) to rotate, the first clamping plate (31) is provided with a first nut (35), the second clamping plate (32) is provided with a second nut (36), the screw rod (34) is threadedly connected to the first nut (35) and the second nut (36), respectively, the screw threads of the first nut (35) and the second nut (36) have opposite spiral directions, and the screw rod (34) drives the first clamping plate (31) and the second clamping plate (32) to move closer to or farther from each other, thereby realizing the opening or closing of the two first clamping claws (33).

10. The rigging type large-diameter vacuum valve according to claim 1, characterized in that: The locking mechanism (11) is evenly distributed in a ring shape around the axis of the sealing flange (10). The locking mechanism (11) comprises a second clamping claw (37), an ear seat (38) and a telescopic cylinder (39). The ear seat (38) is fixedly connected to the sealing flange (10). The ear seat (38) is provided with a U-shaped slide groove (40). The second clamping claw (37) is provided with a convex head (41). When the telescopic cylinder (39) is extended or retracted, the convex head (41) can be driven to slide in the U-shaped slide groove (40), thereby realizing the rotation of the second clamping claw (37) relative to the ear seat (38).

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