Transverse moving type large-diameter vacuum valve

Abstract

The utility model relates to the technical field of vacuum valve cores, in particular to a transverse moving type large-diameter vacuum valve which comprises a transverse valve body, a valve body is provided with a valve body through which gas passes, the valve body is provided with a valve core used for blocking the valve body, and the valve body is provided with a sealing flange. According to the technical scheme, multi-connecting-rod rigid connection of a traditional pre-tightening mechanism is replaced, the pre-tightening process of the valve element is divided into the two processes of alignment with the sealing flange and pre-tightening with the sealing flange, alignment of the valve and the flange is achieved through the two processes of coarse adjustment and fine adjustment, the alignment precision between the valve and the flange is guaranteed, and the sealing performance of the valve element is improved. The air tightness of the vacuum valve meets the requirement, the requirements for machining precision and installation precision of structural components in the driving mode are not high, and compared with a connecting rod structure, the machining cost and the installation difficulty of the pre-tightening mechanism are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum valve cores, in particular to a transversely movable large-diameter vacuum valve. Background Art

[0002] Vacuum valve cores are usually used to control the on / off of pipelines. They are generally divided into medium and large vacuum valve cores (diameter 3 meters and above) and small vacuum valve cores. They are mainly composed of a valve core for gas to pass through and a valve core for sealing the valve core. In order to ensure the airtightness of the vacuum valve core, it is first necessary to ensure the docking accuracy between the valve cores and the pre-tightening force after the two are docked.

[0003] Traditional small and medium-sized valve cores generally use a drive unit (electric cylinder, air cylinder, hydraulic cylinder, etc.) fixed on the valve body, and use a connecting rod to indirectly drive the valve core to achieve pre-tightening of the valve core and the valve core. However, in medium and large valve cores with a diameter of more than 3 meters, the connecting rod is affected by its own weight and length. In addition, the valve core is heavy and the valve core is huge in size, which amplifies the deformation, especially the valve core part, which can weigh tens of tons. If the connecting rod structure of small and medium-sized valve cores is to be used to drive the valve core pre-tightening of large vacuum valve cores, not only a large range of radial movement is required to realize the opening and closing of the valve core, but also axial movement is required for sealing. Under the premise of ensuring the air tightness of the valve core, the connecting rod structure needs to be designed very complexly, and the shape and position tolerance processing accuracy requirements such as the parallelism and flatness of the valve core are also very strict. Its processing and installation process is also very complicated, which makes the cost of large vacuum valve cores very high.

[0004] Therefore, it is necessary to propose a transversely movable large-diameter vacuum valve to reduce the processing cost of the vacuum valve core while ensuring the airtightness of the large vacuum valve core. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the existing large vacuum valve core has very strict requirements on processing accuracy and is very complex in structure, resulting in high cost. A transverse large-diameter vacuum valve is now provided.

[0006] The technical solution of the utility model is:

[0007] A transversely movable large-diameter vacuum valve comprises a horizontal valve body, a valve for gas to pass through the valve body, a valve core for sealing the valve, a sealing flange installed on the valve, and a first pre-tightening mechanism installed on the valve core. The first pre-tightening mechanism is located on the top of the valve core. The first pre-tightening mechanism comprises a crossbeam, a traveling mechanism, a sliding mechanism and a first push plate. The crossbeam is arranged on the top of the valve core and is perpendicular to the valve core. The traveling mechanism is respectively fixed to both ends of the crossbeam. The sliding mechanism is slidably connected to the crossbeam. The first push plate is fixedly connected to the valve core. The sliding mechanism drives the first push plate to move so as to press the valve core and the sealing flange together.

[0008] The walking mechanism includes a limiting guide rail, a protective shell, a track wheel and a first driving device. The protective shell is arranged on the limiting guide rail, the track wheel is fixedly connected to the first driving device, and the first driving device is installed on the protective shell. The first driving device drives the track wheel to move along the guide rail and then drives the protective shell to move along the limiting guide rail. The crossbeam is fixedly connected to the protective shell.

[0009] A locking mechanism is provided on the sealing flange. When the valve core is close to the valve, it fits with the sealing flange. The locking mechanism locks the valve core and the sealing flange along the axial direction of the sealing flange.

[0010] Furthermore, a second pre-tightening mechanism is installed at the bottom of the valve core, and the second pre-tightening mechanism includes a second push plate, a baffle and a second driving device. The second push plate is fixedly connected to the valve core, and the baffle is arranged on both sides of the second push plate in a direction perpendicular to the valve core. The second driving device drives the baffle to move closer to or away from the second push plate.

[0011] Furthermore, the sliding mechanism includes a third driving device and a support frame, wherein first sliders are provided at both ends of the support frame, and sliding grooves for accommodating the first sliders are provided on both sides of the crossbeam. When the third driving device drives the support frame to move, the first slider slides along the sliding groove;

[0012] There are at least two crossbeams, and the crossbeams are parallel to each other, and each baffle is equipped with at least two second driving devices;

[0013] A multi-joint connection mechanism is provided between the first push plate and the support frame, one end of the multi-joint connection mechanism is fixedly connected to the first push plate, and the other end of the multi-joint connection mechanism is rotatably connected to the support frame.

[0014] Furthermore, a first roller is mounted on the first slider. When the first slider slides in the sliding groove, the first roller contacts the sliding groove and rolls relative to the sliding groove.

[0015] The bottom of the second push plate is fixedly connected with a second slider, and the second slider is mounted with a second roller. When the baffle plate approaches the second push plate, the second roller contacts the baffle plate and rolls relative to the baffle plate.

[0016] Furthermore, rail clamps are installed at both ends of the walking mechanism, and the rail clamps include a housing, a fourth driving device is provided on the outside of the housing, a first clamping plate and a second clamping plate are provided in parallel with each other in the housing, the first clamping plate and the second clamping plate are both rotatably connected to the housing, and one end of the housing is provided with two first clamping claws arranged opposite to each other, the first clamping plate is fixedly connected to one of the first clamping claws, and the second clamping plate is fixedly connected to the other first clamping claw;

[0017] A screw is provided in the housing, and the fourth driving device drives the screw 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 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 drives the first clamping plate and the second clamping plate to move closer to or away from each other, thereby realizing the opening or closing of the two first clamping jaws.

[0018] The locking mechanism is evenly distributed in a ring shape around the axis of the sealing flange. The locking mechanism includes a second 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 second 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 second claw relative to the ear seat.

[0019] 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 first push plate.

[0020] Furthermore, the axis of the first pin shaft is perpendicular to the valve core, the axis of the second pin shaft is parallel to the valve core, and the axis of the third pin shaft is parallel to the valve core.

[0021] Furthermore, a guide tube is provided on the side of the valve body opposite to the sealing flange, and the axis of the guide tube coincides with the axis of the sealing flange;

[0022] A coaxial guide ring is provided inside the guide cylinder. A fifth drive device is provided on the valve body. The fifth drive device drives the guide ring to move back and forth between the sealing flange and the guide cylinder. The guide ring located at the sealing flange can form a guide pipe with the guide cylinder for gas to pass through. The guide pipe isolates the gas from the interior of the valve body.

[0023] The guide ring is connected with the guide tube in a sliding manner. The guide tube is provided with a guide groove. The guide ring is provided with a guide rail. A guide roller is provided in the guide groove. The guide rail contacts the guide roller and slides along the guide groove.

[0024] Furthermore, there are at least two third driving devices, and each crossbeam corresponds to a third driving device. There are at least four first sliding blocks, and a first sliding block is installed on both sides of each crossbeam.

[0025] Furthermore, at least two first push plates are provided, and the first push plates are respectively provided at both ends of the support frame, and each end of the support frame is installed with a multi-joint connection mechanism.

[0026] The utility model discloses a transversely movable large-diameter vacuum valve. The traveling mechanism can drive the valve core to move so that the valve core is initially aligned with the flange to achieve coarse adjustment. Then, the sliding mechanism moves relative to the crossbeam, driving the first push plate to move in the direction close to the flange so that the valve core and the flange are in contact to achieve fine adjustment. Then, the sliding mechanism continues to move, driving the top of the valve core to press against the flange to complete the valve pre-tightening process. Finally, the locking mechanism locks the valve core and the sealing flange to achieve fixation of the valve core and the sealing flange. Compared with the traditional technology, the present technical solution replaces the multi-link rigid connection of the traditional pre-tightening mechanism and divides the pre-tightening process of the valve core into two processes: alignment with the sealing flange and pre-tightening with the sealing flange. The alignment of the valve and the flange is achieved through the coarse adjustment and fine adjustment processes, ensuring the alignment accuracy between the valve and the flange. The locking mechanism locks and presses the valve core and the valve together to ensure the tightness between the valve core and the sealing flange, so that the airtightness of the vacuum valve meets the requirements. The machining and installation accuracy requirements of the structural components in this driving mode are not high. Compared with the connecting rod structure, the machining cost and installation difficulty of the pre-tightening mechanism are effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The utility model is a three-dimensional Figure 1 ;

[0028] Figure 2 The utility model is a three-dimensional Figure 2 ;

[0029] Figure 3 This is a reference diagram of the valve core structure of this utility model;

[0030] Figure 4 For this utility model Figure 2 A partial enlarged view of the middle part;

[0031] Figure 5 This is a structural reference diagram of the first locking mechanism of the present utility model;

[0032] Figure 6 This is a combined view of the baffle and the first driving device of the utility model;

[0033] Figure 7 For this utility model Figure 5 A partial enlarged view of point B in the middle;

[0034] Figure 8 For this utility model Figure 5 A partial enlarged view of point C in the middle;

[0035] Figure 9 This is a reference diagram of the valve core in use of the utility model;

[0036] Figure 10 This is a combined view of the first pre-tightening device and the valve core of the utility model

[0037] Figure 11 This is the reference diagram of the locking device structure of this utility model

[0038] Figure 12 This is a three-dimensional diagram of the rail clamp of the utility model;

[0039] Figure 13 This is a structural reference diagram of the rail clamp of the utility model;

[0040] Figure 14 Reference for the use status of the guide ring of this utility model Figure 1 ;

[0041] Figure 15 Reference for the use status of the guide ring of this utility model Figure 2 ;

[0042] Figure 16 For this utility model Figure 15 A partial enlarged view of point D in the middle

[0043] Figure 17 For this utility model Figure 9 A partial enlarged view of point E in the middle.

[0044] Figure numerals: 1. first pre-tightening mechanism; 2. second pre-tightening mechanism; 3. valve core; 4. crossbeam; 5. walking mechanism; 6. sliding mechanism; 7. first push plate; 8. second push plate; 9. baffle; 10. second driving device; 11. third driving device; 12. support frame; 13. first slider; 14. sliding groove; 15. first roller; 16. second slider; 17. second roller; 18. multi-joint connecting mechanism; 19. first joint; 20. second joint; 21. joint arm; 22. first pin; 23. second pin; 24. third pin; 25. sealing flange; 26. limit device; 27. limit guide rail ; 28. Protective shell; 29. ​​Track wheel; 30. First drive device; 31. Locking mechanism; 32. Track clamp; 33. Fourth drive device; 34. First clamping plate; 35. Second clamping plate; 36. First clamping claw; 37. Screw rod; 38. First nut; 39. Second nut; 40. Second clamping claw; 41. Ear seat; 42. Telescopic cylinder; 43. U-shaped slide; 44. Boss; 45. Valve body; 46. Guide tube; 47. Guide ring; 48. Fifth drive device; 49. Guide groove; 50. Guide roller; 51. Reinforcement rib; 52. Reinforcement plate; 53. Cross-shaped reinforcement rib; 54. Maintenance manhole; 55. Lifting ring. DETAILED DESCRIPTION

[0045] In order to make the technical means, technical features, purpose of the utility model and technical effects achieved by the utility model easier to understand, the utility model is further explained below with reference to specific illustrations.

[0046] Example 1:

[0047] like Figure 1 and Figure 2 As shown, this embodiment provides a pre-tightening device for a large valve, including a horizontal valve body 45, a valve for gas passing through the valve body 45, a valve core 3 for sealing the valve, a sealing flange 25 installed on the valve, and a first pre-tightening mechanism 1 and a second pre-tightening mechanism 2 installed on the valve 3. The first pre-tightening mechanism 1 is located at the top of the valve 3, and the second pre-tightening mechanism 2 is located at the bottom of the valve 3. The first pre-tightening mechanism 1 includes a beam 4, a walking mechanism 5, a sliding mechanism 6 and a first push plate 7. The beam 4 is provided at the top of the valve 3 and is perpendicular to the valve 3. The walking mechanism 5 is respectively screwed or welded to the two ends of the beam 4, the sliding mechanism 6 is slidably connected to the beam 4, and the first push plate 7 is welded or screwed to the valve 3. Figure 4 and Figure 6 As shown, the sliding mechanism 6 drives the first push plate 7 to move so as to press the valve 3 and the sealing flange 25 together. The second pre-tightening mechanism 2 includes a second push plate 8, a baffle 9 and a second driving device 10. The second push plate 8 is welded or fixed to the valve 3 with screws. The baffles 9 are arranged on both sides of the second push plate 8 in a direction perpendicular to the valve 3. The second driving device 10 drives the baffles 9 to move closer to or away from the second push plate 8. Figure 17 As shown, the walking mechanism 5 includes a limiting guide rail 27, a protective shell 28, a track wheel 29 and a first drive device 30. The protective shell 28 is arranged on the limiting guide rail 27, and the track wheel 29 is fixedly connected to the first drive device 30 with screws. The first drive device 30 is installed on the protective shell 28. The first drive device 30 drives the track wheel 29 to move along the guide rail and then drives the protective shell 28 to move along the limiting guide rail 27. The crossbeam 4 is fixedly connected to the protective shell 28 with screws. Preferably, reinforcing ribs 51 and reinforcing plates 52 are welded on the outside of the valve body 45 to improve the overall structural strength of the valve body 45. Preferably, the valve core 3 is a circular cover plate with one side convex and the other side concave. A cross-shaped reinforcing rib 53 is provided on the concave side of the cover plate to increase the structural strength of the valve core 3. Preferably, a maintenance manhole 54 and a lifting ring 55 are also provided on the valve body 45, which are respectively used to enter the valve body 45 for maintenance and lifting the valve body 45.

[0048] Preferably, a locking mechanism 31 is provided on the sealing flange 25. When the valve core 3 is close to the valve, it fits with the sealing flange 25. The locking mechanism 31 locks the valve core 3 and the sealing flange 25 along the axial direction of the sealing flange 25. The locking mechanism 31 is evenly distributed in a ring shape around the axis of the sealing flange 25. The locking mechanism 31 includes a second claw 40, an ear seat 41 and a telescopic cylinder 42. The ear seat 41 is fixedly connected to the sealing flange 25 with screws. The ear seat 41 is provided with a U-shaped groove 43. The second claw 40 is provided with a convex head 44. When the telescopic cylinder 42 is extended or retracted, the convex head 44 can be driven to slide in the U-shaped groove 43, thereby realizing the rotation of the second claw 40 relative to the ear seat 41. The telescopic cylinder 42 is installed on the outside of the valve body, and the ear seat 41 and the second claw 40 are installed on the inside of the valve body.

[0049] Preferably, Figure 5 As shown, the sliding mechanism 6 includes a third driving device 11 and a support frame 12. The third driving device 11 is fixedly connected to the crossbeam 4 with screws. The first slider 13 is fixed with screws at both ends of the support frame 12. Sliding grooves 14 for accommodating the first slider 13 are provided on both sides of the crossbeam 4. When the third driving device 11 drives the support frame 12 to move, the first slider 13 slides along the sliding groove 14.

[0050] Preferably, Figure 7 As shown, a first roller 15 is installed on the first slider 13. When the first slider 13 slides in the sliding groove 14, the first roller 15 contacts the sliding groove 14 and rolls relative to the sliding groove 14. The first roller 15 can reduce the friction between the first slider 13 and the sliding groove 14 to ensure smooth operation of the mechanism.

[0051] Preferably, Figure 3 and Figure 4 As shown, the bottom screw of the second push plate 8 is fixedly connected with the second slider 16, and the second roller 17 is installed on the second slider 16. When the baffle 9 approaches the second push plate 8, the second roller 17 contacts the baffle 9 and rolls relative to the baffle 9. The second roller 17 can reduce the friction after the second slider 16 contacts the second push plate 8 to ensure smooth movement of the mechanism. Moreover, since the valve core 3 is lifted and moved by the walking mechanism 5 during movement, the heavy valve core 3 will shake. The shaking direction is divided into a direction perpendicular to the axis of the sealing flange 25 and a direction parallel to the axis of the sealing flange 25. The setting of the baffle 9 can prevent the valve core 3 from shaking excessively on the axis parallel to the sealing flange 25, affecting the stability of the mechanism, preventing collisions and causing collision damage to the facilities. Moreover, driven by the second driving device 10, the baffle 9 can approach or move away from the second push plate 8, so that the shaking stroke of the valve core 3 is always within a reasonable range, which is convenient for adjustment.

[0052] Preferably, Figure 3 and Figure 12 As shown, rail clamps 32 are installed at both ends of the walking mechanism 5. The rail clamps 32 include a housing, as shown in FIG. Figure 13 As shown, a fourth driving device 33 is provided on the outside of the shell, and a first clamping plate 34 and a second clamping plate 35 parallel to each other are provided in the shell. The first clamping plate 34 and the second clamping plate 35 are both rotatably connected to the shell through bearings or pins. One end of the shell is provided with two first claws 36 arranged opposite to each other. The first clamping plate 34 is fixedly connected to one of the first claws 36 by screws, and the second clamping plate 35 is fixedly connected to the other first claw 36 by screws.

[0053] A screw rod 37 is provided in the shell, and the fourth driving device 33 drives the screw rod 37 to rotate. The first clamping plate 34 is provided with a first nut 38, and the second clamping plate 35 is provided with a second nut 39. The screw rod 37 is threadedly connected to the first nut 38 and the second nut 39 respectively. The screw directions of the first nut 38 and the second nut 39 are opposite. The screw rod 37 drives the first clamping plate 34 and the second clamping plate 35 to move closer to or away from each other, thereby realizing the opening or closing of the two first clamping claws 36.

[0054] A first clamping plate 34 and a second clamping plate 35 are provided in the shell. Since the screw directions of the first nut 38 and the second nut 39 are opposite, when the screw rod 37 rotates, the first nut 38 and the second nut 39 will move along the axial direction of the screw rod 37, and the movement directions are opposite, thereby driving the first clamping plate 34 and the second clamping plate 35 to move closer to or away from each other. The two claws 36 are opened and closed under the drive of the first clamping plate 34 and the second clamping plate 35. When the claws 36 are opened, the guide rail is released, and when the claws 36 are closed, the guide rail is clamped, thereby achieving the clamping of the guide rail. In this way, even if the valve plate is impacted during the pre-tightening process, the valve plate will not shake, and the driving moving mechanism will not move, thereby ensuring the stability of the mechanism.

[0055] like Figure 1 、 Figure 2 and Figure 11 As shown, the locking mechanism 31 is evenly distributed in a ring shape around the axis of the sealing flange 25. The locking mechanism 31 includes a second claw 40, an ear seat 41 and a telescopic cylinder 42. The ear seat 41 is fixedly connected to the sealing flange 25 with screws. The ear seat 41 is provided with a U-shaped groove 43. A protrusion 44 is fixedly connected with screws on the second claw 40. When the telescopic cylinder 42 is extended or retracted, the protrusion 44 can be driven to slide in the U-shaped groove 43, thereby realizing the rotation of the second claw 40 relative to the ear seat 41. The telescopic cylinder 42 can be a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

[0056] Preferably, Figure 3 As shown, a multi-joint connection mechanism 18 is provided between the first push plate 7 and the support frame 12, and one end of the multi-joint connection mechanism 18 is fixedly connected to the first push plate 7, as shown in FIG. Figure 5 As shown, the other end of the multi-joint connection mechanism 18 is rotatably connected to the support frame 12. Specifically, as shown in FIG. Figure 8As shown, the multi-joint connection mechanism 18 includes a first joint 19, a second joint 20 and a joint arm 21 located between the first joint 19 and the second joint 20, the joint arm 21 is rotatably connected to the first joint 19 and the second joint 20 respectively, the first joint 19 is rotatably connected to the support frame 12 through a first pin 22, the first joint 19 is rotatably connected to the joint arm 21 through a second pin 23, the second joint 20 is rotatably connected to the joint arm 21 through a third pin 24, and the second joint 20 is fixedly connected to the first push plate 7 by screws. Preferably, the axis of the first pin 22 is perpendicular to the valve 3, the axis of the second pin 23 is parallel to the valve 3, and the axis of the third pin 24 is parallel to the valve 3. Since the valve 3 will generate a large momentum due to its large mass at the moment of starting and stopping, in order to reduce the damage caused by the momentum of the valve 3 to the walking mechanism 5 and the sliding mechanism 6, the use of a multi-joint connection structure can effectively reduce the influence of the valve core on each motion mechanism.

[0057] Preferably, at least two crossbeams 4 are provided, and the crossbeams 4 are parallel to each other. Each baffle 9 is installed with at least two second driving devices 10, and the second driving devices 10 are fixed to the valve body by screws.

[0058] Preferably, Figure 14 As shown, a guide cylinder 46 is provided on the side of the valve body 45 opposite to the sealing flange 25. The axis of the guide cylinder 46 coincides with the axis of the sealing flange 25. A guide ring 47 coaxial with the guide cylinder 46 is provided inside the guide cylinder 46. A fifth driving device 48 is provided on the valve body 45. The fifth driving device 48 drives the guide ring 47 to move back and forth between the sealing flange 25 and the guide cylinder 46. Figure 15 As shown, the guide ring 47 located at the sealing flange can form a guide tube with the guide cylinder 46 for gas to pass through. The guide tube isolates the gas from the inside of the valve body 45. The guide ring 47 is slidably connected to the guide cylinder 46, as shown in FIG. Figure 16 As shown, a guide groove 49 is provided on the guide tube 46 , a guide rail is provided on the guide ring 47 , a guide roller 50 is provided in the guide groove 49 , and the guide rail contacts the guide roller 50 and slides along the guide groove 49 .

[0059] When the valve core 3 is moved out of the sealing flange 25, the pipeline is opened. Since the guide ring 47, the guide cylinder 46 and the sealing flange 25 are all coaxial, when the fifth driving device 48 drives the guide ring 5 to move to the sealing flange 25, the guide ring 5 can be connected with the guide cylinder 4, thereby forming a guide pipe 7 for gas to pass through. Since the valve is covered by the guide ring 5 at this time, the passing gas is isolated by the guide ring 5 and will only pass through the guide ring 47 and will not enter the interior of the valve body 1, thereby isolating the gas from the interior of the valve body 1. When the valve needs to be closed, First, the fifth driving device 48 drives the guide ring 47 to move out, or in other words, to move it out of the valve body 45. When the guide ring 47 moves to the guide tube 46, the guide ring 47 overlaps with the guide tube 46, and then the valve core 3 moves toward the sealing flange 25 under the drive unit. Without the guide ring 47, the valve core 3 will not be blocked when moving to the sealing flange 25, thereby realizing the sealing flange 25 of the valve core 3, completing the closure of the valve, realizing the isolation of the gas from the drive unit inside the valve body 1, and improving the service life of the drive unit.

[0060] Preferably, there are at least two, preferably two, third drive devices 11 , and each beam 4 corresponds to a third drive device 11 . There are at least four, preferably four, first sliders 13 , and a first slider 13 is installed on both sides of each beam 4 .

[0061] Preferably, at least two, preferably two, first push plates 7 are provided. The first push plates 7 are respectively provided at both ends of the support frame 12 , and a multi-joint connection mechanism 18 is installed at each end of the support frame 12 .

[0062] Preferably, Figure 7 As shown, a limiting device 26 is provided on both sides of each first slider 13 for limiting the movement stroke of the sliding mechanism 6. The limiting device 26 can be a laser sensor, an infrared sensor or other distance sensor, or a limit switch triggered by pressing.

[0063] The first drive device 30, the second drive device 10, the third drive device 11, the fourth drive device 33 and the fifth drive device 48 can be electric cylinders, air cylinders or hydraulic cylinders, and those skilled in the art can choose according to actual conditions.

[0064] When using, Figure 9 and Figure 10As shown, the walking mechanism 5 can drive the valve 3 to move, so that the valve 3 is initially aligned with the sealing flange 25 to achieve coarse adjustment, and then the sliding mechanism 6 moves relative to the crossbeam 4, driving the first push plate 7 to move in the direction close to the sealing flange 25, so that the valve 3 fits the sealing flange 25 to achieve fine adjustment, and then the sliding mechanism 6 continues to move, driving the top of the valve 3 to be pressed against the sealing flange 25, and at the same time, the second pre-tightening mechanism 2 at the bottom of the valve 3 cooperates with the first pre-tightening mechanism 1 to operate synchronously, and the second driving device 10 drives the baffle 9 to approach the second push plate 8, driving the second push plate 8 to move toward the sealing flange 25, thereby pressing the bottom of the valve 3 against the sealing flange 25, completing the pre-tightening process of the valve 3. Compared with the traditional technology, the present technical solution is more convenient than the traditional technology. Instead of the multi-link rigid connection of the traditional pre-tightening mechanism, the pre-tightening process of the valve 3 is divided into two processes: alignment with the sealing flange 25 and pressing with the sealing flange 25. The alignment of the valve 3 and the sealing flange 25 is achieved through the two processes of coarse adjustment and fine adjustment, thereby ensuring the alignment accuracy between the valve 3 and the sealing flange 25. The first pre-tightening mechanism 1 and the second pre-tightening mechanism 2 are respectively pressed separately with the upper and lower parts of the valve 3 to ensure the tightness between the valve 3 and the sealing flange 25, so that the pre-tightening force of the vacuum valve 3 meets the requirements. In addition, whether it is the first pre-tightening mechanism 1 or the second pre-tightening mechanism 2, the processing accuracy and installation accuracy requirements of the structural components therein are not high. Compared with the connecting rod structure, the processing cost and installation difficulty of the pre-tightening mechanism are effectively reduced.

[0065] 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. In other words, any equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the technical scope of the present invention.

Claims

1. A transversely movable large-caliber vacuum valve, comprising a horizontal valve body (45), a valve for gas to pass through the valve body (45), a valve core (3) for sealing the valve, and a sealing flange (25) mounted on the valve, characterized in that: It also includes a first pre-tightening mechanism (1) installed on the valve core (3), the first pre-tightening mechanism (1) is located on the top of the valve core (3), the first pre-tightening mechanism (1) includes a crossbeam (4), a walking mechanism (5), a sliding mechanism (6) and a first push plate (7), the crossbeam (4) is located on the top of the valve core (3) and is perpendicular to the valve core (3), the walking mechanism (5) is fixed to both ends of the crossbeam (4), the sliding mechanism (6) is slidably connected to the crossbeam (4), the first push plate (7) is fixedly connected to the valve core (3), and the sliding mechanism (6) drives the first push plate (7) to move so as to press the valve core (3) and the sealing flange (25); The walking mechanism (5) includes a limiting guide rail (27), a protective shell (28), a track wheel (29) and a first driving device (30), wherein the protective shell (28) is arranged on the limiting guide rail (27), the track wheel (29) is fixedly connected to the first driving device (30), and the first driving device (30) is installed on the protective shell (28). The first driving device (30) drives the track wheel (29) to move along the guide rail and then drives the protective shell (28) to move along the limiting guide rail (27), and the crossbeam (4) is fixedly connected to the protective shell (28); A locking mechanism (31) is provided on the sealing flange (25). When the valve core (3) is close to the valve, it fits the sealing flange (25). The locking mechanism (31) locks the valve core (3) and the sealing flange (25) along the axial direction of the sealing flange (25).

2. The transversely movable large-diameter vacuum valve according to claim 1, characterized in that: A second pre-tightening mechanism (2) is installed at the bottom of the valve core (3). The second pre-tightening mechanism (2) includes a second push plate (8), a baffle (9) and a second driving device (10). The second push plate (8) is fixedly connected to the valve core (3). The baffle (9) is arranged on both sides of the second push plate (8) in a direction perpendicular to the valve core (3). The second driving device (10) drives the baffle (9) to move closer to or away from the second push plate (8).

3. The transversely movable large-diameter vacuum valve according to claim 2, characterized in that: The sliding mechanism (6) includes a third driving device (11) and a support frame (12). First sliders (13) are provided at both ends of the support frame (12). Sliding grooves (14) for accommodating the first sliders (13) are provided on both sides of the crossbeam (4). When the third driving device (11) drives the support frame (12) to move, the first slider (13) slides along the sliding grooves (14). There are at least two crossbeams (4), and the crossbeams (4) are parallel to each other, and each baffle (9) is equipped with at least two second drive devices (10); A multi-joint connection mechanism (18) is provided between the first push plate (7) and the support frame (12), one end of the multi-joint connection mechanism (18) is fixedly connected to the first push plate (7), and the other end of the multi-joint connection mechanism (18) is rotatably connected to the support frame (12).

4. The transversely movable large-diameter vacuum valve according to claim 3, characterized in that: A first roller (15) is mounted on the first slider (13). When the first slider (13) slides in the sliding groove (14), the first roller (15) contacts the sliding groove (14) and rolls relative to the sliding groove (14). A second slider (16) is fixedly connected to the bottom of the second push plate (8), and a second roller (17) is mounted on the second slider (16). When the baffle (9) approaches the second push plate (8), the second roller (17) contacts the baffle (9) and rolls relative to the baffle (9).

5. The transversely movable large-diameter vacuum valve according to claim 1, characterized in that: Rail clamps (32) are installed at both ends of the walking mechanism (5), and the rail clamps (32) include a shell, a fourth driving device (33) is provided on the outside of the shell, and a first clamping plate (34) and a second clamping plate (35) are provided in parallel with each other in the shell, and the first clamping plate (34) and the second clamping plate (35) are both rotatably connected to the shell. One end of the shell is provided with two first clamping claws (36) arranged opposite to each other, the first clamping plate (34) is fixedly connected to one of the first clamping claws (36), and the second clamping plate (35) is fixedly connected to the other first clamping claw (36); A screw rod (37) is provided in the housing, the fourth driving device (33) drives the screw rod (37) to rotate, the first clamping plate (34) is provided with a first nut (38), the second clamping plate (35) is provided with a second nut (39), the screw rod (37) is threadedly connected to the first nut (38) and the second nut (39), respectively, the screw directions of the first nut (38) and the second nut (39) are opposite, and the screw rod (37) drives the first clamping plate (34) and the second clamping plate (35) to move closer to or away from each other, thereby realizing the opening or closing of the two first clamping claws (36); The locking mechanism (31) is evenly distributed in a ring shape around the axis of the sealing flange (25). The locking mechanism (31) includes a second claw (40), an ear seat (41) and a telescopic cylinder (42). The ear seat (41) is fixedly connected to the sealing flange (25). The ear seat (41) is provided with a U-shaped chute (43). The second claw (40) is provided with a convex head (44). When the telescopic cylinder (42) is extended or retracted, the convex head (44) can be driven to slide in the U-shaped chute (43), thereby realizing the rotation of the second claw (40) relative to the ear seat (41).

6. The transversely movable large-diameter vacuum valve according to claim 3, characterized in that: The multi-joint connection mechanism (18) includes a first joint (19), a second joint (20), and a joint arm (21) located between the first joint (19) and the second joint (20), wherein the joint arm (21) is rotationally connected to the first joint (19) and the second joint (20), respectively. The first joint (19) is rotationally connected to the support frame (12) via a first pin (22), the first joint (19) is rotationally connected to the joint arm (21) via a second pin (23), the second joint (20) is rotationally connected to the joint arm (21) via a third pin (24), and the second joint (20) is fixedly connected to the first push plate (7).

7. The transversely movable large-diameter vacuum valve according to claim 6, characterized in that: The axis of the first pin (22) is perpendicular to the valve core (3), the axis of the second pin (23) is parallel to the valve core (3), and the axis of the third pin (24) is parallel to the valve core (3).

8. The transversely movable large-diameter vacuum valve according to claim 1, characterized in that: A guide tube (46) is provided on a side of the valve body (45) opposite to the sealing flange (25), and the axis of the guide tube (46) coincides with the axis of the sealing flange (25); A guide ring (47) coaxial with the guide cylinder (46) is provided in the guide cylinder (46), and a fifth driving device (48) is provided on the valve body (45). The fifth driving device (48) drives the guide ring (47) to move back and forth between the sealing flange (25) and the guide cylinder (46). The guide ring (47) located at the sealing flange can form a guide pipe with the guide cylinder (46) for gas to pass through, and the guide pipe isolates the gas from the interior of the valve body (45); The guide ring (47) is slidably connected to the guide tube (46). The guide tube (46) is provided with a guide groove (49). The guide ring (47) is provided with a guide rail. A guide roller (50) is provided in the guide groove (49). The guide rail contacts the guide roller (50) and slides along the guide groove (49).

9. The transversely movable large-diameter vacuum valve according to claim 3, characterized in that: At least two third drive devices (11) are provided, and each crossbeam (4) corresponds to one third drive device (11). At least four first sliders (13) are provided, and a first slider (13) is installed on both sides of each crossbeam (4).

10. The transversely movable large-diameter vacuum valve according to claim 5, characterized in that: At least two first push plates (7) are provided, and the first push plates (7) are respectively provided at both ends of the support frame (12), and each end of the support frame (12) is installed with a multi-joint connection mechanism (18).

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