Transverse moving type large-diameter vacuum valve
By adopting a transverse design and pretension mechanism in the large vacuum valve core, the problems of high machining accuracy and complex structure in the prior art are solved, and the effect of reducing costs and ensuring airtightness is achieved.
Patent Information
- Application Number
- CN202411547132.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-03-04
AI Technical Summary
The existing large vacuum valve core has strict processing accuracy requirements and complex structure, resulting in high cost.
The transverse large-diameter vacuum valve design adopts the design, and through the first and second pretension mechanisms and the sliding mechanism, it is divided into two processes: coarse adjustment and fine adjustment, so as to achieve alignment and pretension of the valve core and sealing flange.
It reduces the processing cost and installation difficulty of the preloading mechanism, ensures the alignment accuracy and tightness between the valve and the flange, and meets the airtightness requirements of the vacuum valve.
Smart Images
Figure CN119554433A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of vacuum valve cores, and 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, 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 air tightness of the large vacuum valve core. Summary of the invention
[0005] The purpose of the present invention is to solve the problem that the existing large vacuum valve core has very strict requirements on processing accuracy and a very complex structure, resulting in a high cost. A transverse large-diameter vacuum valve is now provided.
[0006] The technical solution of the present invention is: A transversely movable large-caliber vacuum valve, comprising 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 walking 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 walking mechanism is respectively fixed at 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, and the sliding mechanism drives the first push plate to move so as to press the valve core and the sealing flange together; 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. 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. 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.
[0007] 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 plate and a second driving device. The second push plate is fixedly connected to the valve core, and the baffle plate 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 plate to move closer to or away from the second push plate.
[0008] Furthermore, the sliding mechanism includes a third driving device and a support frame, a first slider is provided at both ends of the support frame, and a sliding groove for accommodating the first slider is provided on both sides of the crossbeam, and when the third driving device drives the support frame to move, the first slider slides along the sliding groove; There are at least two cross beams, and the cross beams are parallel to each other, and each baffle is equipped with at least two second driving devices; 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.
[0009] Furthermore, a first roller is mounted on the first slider, and when the first slider slides in the sliding groove, the first roller contacts the sliding groove and rolls relative to the sliding groove; The bottom of the second push plate is fixedly connected with a second sliding block, and a second roller is installed on the second sliding block. When the baffle plate approaches the second push plate, the second roller contacts the baffle plate and rolls relative to the baffle plate.
[0010] Furthermore, rail clamps are installed at both ends of the walking device, and the rail clamps include a shell, a fourth driving device is provided on the outer side of the shell, a first clamping plate and a second clamping plate parallel to each other are provided in 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 first claws arranged opposite to each other, the first clamping plate is fixedly connected to one of the first claws, and the second clamping plate is fixedly connected to the other first claw; A screw rod is provided in the housing, 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 with the first nut and the second nut respectively, and the screw directions of the first nut and the second nut are opposite. The screw rod 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 claws. 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 or 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.
[0011] 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.
[0012] 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.
[0013] 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; A guide ring coaxial with the guide cylinder is provided in the guide cylinder, and a fifth driving device is provided on the valve body. The fifth driving 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, and the guide pipe isolates the gas from the inside of the valve body. The guide ring is slidably connected with the guide tube. The guide tube is provided with a guide groove. The guide ring is provided with a guide rail. A guide roller is arranged in the guide groove. The guide rail contacts the guide roller and slides along the guide groove.
[0014] Furthermore, at least two third driving devices are provided, and each crossbeam corresponds to a third driving device respectively. At least four first sliding blocks are provided, and a first sliding block is installed on both sides of each crossbeam respectively.
[0015] Furthermore, at least two first push plates are provided, and the first push plates are respectively provided at two ends of the support frame, and a multi-joint connection mechanism is installed at each end of the support frame.
[0016] In a transversely movable large-caliber vacuum valve of the present invention, the walking mechanism can drive the valve core to move, so that the valve core is initially aligned with the flange to achieve rough adjustment, and 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 fits the flange to achieve fine adjustment, and then the sliding mechanism continues to move, driving the top of the valve core to be pressed against the flange to complete the pre-tightening process of the valve, and finally the locking mechanism locks the valve core with the sealing flange to achieve the fixation of the valve core and the sealing flange. Compared with the traditional technology, the technical scheme 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 of alignment with the sealing flange and pre-tightening with the sealing flange. The alignment of the valve and the flange is achieved through the two processes of rough adjustment and fine adjustment, and the alignment accuracy between the valve and the flange is ensured. The valve core and the valve are locked and pressed together by the locking mechanism, and the tightness between the valve core and the sealing flange is ensured, so that the air tightness of the vacuum valve meets the requirements. The machining accuracy 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
[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 This is a reference diagram of the valve core structure of the present invention; Figure 4 For the present invention Figure 3 A partial enlarged view of the middle part; Figure 5 This is a structural reference diagram of the first locking mechanism of the present invention; Figure 6 A combined view of the baffle and the first driving device of the present invention; Figure 7 For the present invention Figure 5 A partial enlarged view of point B in the middle; Figure 8 For the present invention Figure 5 A partial enlarged view of the middle C; Fig. 9 This is a reference diagram of the valve core in use of the present invention; Fig.10 This is a combined view of the first pre-tightening device and the valve core of the present invention Fig.11 The locking device structure of the present invention is shown in FIG. Fig.12 A three-dimensional diagram of the rail clamp of the present invention; Fig.13 This is a structural reference diagram of the rail clamp of the present invention; Fig.14Reference for the use status of the guide ring of the present invention Figure 1 ; Fig.15 Reference for the use status of the guide ring of the present invention Figure 2 ; Fig.16 For the present invention Fig.15 A partial enlarged view of point D in the middle Fig.17 For the present invention Fig. 9 A partial enlarged view of point E in the middle.
[0018] 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 plate; 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 connection 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 claw; 37. Screw rod; 38. First nut; 39. Second nut; 40. Second claw; 41. Ear seat; 42. Telescopic cylinder; 43. U-shaped slide groove; 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
[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 2As shown, this embodiment provides a pre-tightening device for a large valve, including a horizontal valve body 45, a valve for gas to pass through is opened on the valve body 45, a valve core 3 for blocking the valve is provided on the valve, a sealing flange 25 is installed on the valve, and also includes 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 arranged on 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, as shown in FIG. 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 screwed to the valve 3. The baffle 9 is 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 baffle 9 to move closer to or away from the second push plate 8. Fig.17 As shown, the walking mechanism 5 includes a limiting guide rail 27, a protective shell 28, a track wheel 29 and a first driving 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 driving device 30 by screws. The first driving device 30 is installed on the protective shell 28, and 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. The cross beam 4 is fixedly connected to the protective shell 28 by 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 arranged 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 arranged on the valve body 45, which are respectively used to enter the valve body 45 for maintenance and lifting the valve body 45.
[0021] 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.
[0022] 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 by screws. The first sliding block 13 is fixedly fixed to both ends of the support frame 12 by screws. Both sides of the crossbeam 4 are provided with sliding grooves 14 for accommodating the first sliding block 13. When the third driving device 11 drives the support frame 12 to move, the first sliding block 13 slides along the sliding groove 14.
[0023] 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 smoothness of the mechanism.
[0024] Preferably, Figure 3 and Figure 4 As shown, the second slider 16 is fixedly connected to the bottom screw of the second push plate 8, 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 with the baffle 9 and rolls relative to the baffle 9. The second roller 17 can reduce the friction force after the second slider 16 contacts the second push plate 8 to ensure smooth movement of the mechanism. Since the valve core 3 is lifted and moved by the walking mechanism 5 during the movement, the heavy valve core 3 will shake, and 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 bumps and collision damage to the facilities, and 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.
[0025] Preferably, Figure 3 and Fig.12 As shown, rail clamps 32 are installed at both ends of the walking device 5, and the rail clamps 32 include a shell, such as Fig.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.
[0026] 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 with 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 claws 36.
[0027] A first clamping plate 34 and a second clamping plate 35 are provided in the shell. Since the screw threads of the first nut 38 and the second nut 39 have opposite directions, 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 in opposite directions, thereby driving the first clamping plate 34 and the second clamping plate 35 to approach or move 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. The claws 36 release the guide rail when they are opened and clamp the guide rail when they are closed, thereby clamping the guide rail. In this way, the valve plate will not shake even if it is impacted during the pre-tightening process, and the travel moving mechanism will not move, thereby ensuring the stability of the mechanism.
[0028] like Figure 1 , Figure 2 and Fig.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 convex head 44 is fixedly connected with screws on the second claw 40. 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 can be a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.
[0029] 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. Figure 5 As shown, the other end of the multi-joint connection mechanism 18 is rotatably connected to the support frame 12. Specifically, as 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 through 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.
[0030] Preferably, at least two cross beams 4 are provided, and the cross beams 4 are parallel to each other, and each baffle 9 is installed with at least two second driving devices 10, and the second driving devices 10 are fixedly mounted on the valve body by screws.
[0031] Preferably, Fig.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 reciprocate between the sealing flange 25 and the guide cylinder 46. Fig.15 As shown, the guide ring 47 located at the sealing flange can form a guide tube with the guide tube 46 for gas to pass through, and the guide tube isolates the gas from the inside of the valve body 45. The guide ring 47 is slidably connected to the guide tube 46, as shown in FIG. Fig.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 .
[0032] When the valve core 3 is moved out of the sealing flange 25, the pipeline is opened. Since the guide ring 47, the guide tube 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 tube 4 to form a guide tube 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 inside of the valve body 1, thereby achieving the isolation of the gas from the inside 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, 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 to the sealing flange 25 driven by the driving 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 of the sealing flange 25 by the valve core 3, completing the closure of the valve, realizing the isolation of the gas from the driving unit inside the valve body 1, and improving the service life of the driving unit.
[0033] Preferably, at least two, preferably two, third driving devices 11 are provided, and each crossbeam 4 corresponds to a third driving device 11 . At least four, preferably four, first sliding blocks 13 are provided, and a first sliding block 13 is installed on both sides of each crossbeam 4 .
[0034] Preferably, at least two, preferably 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 a multi-joint connection mechanism 18 is installed at each end of the support frame 12 .
[0035] Preferably, Figure 7 As shown, both sides of each first slider 13 are provided with a limit device 26 for limiting the movement stroke of the sliding mechanism 6. The limit device 26 can be a laser sensor, an infrared sensor or other distance sensor, or a limit switch triggered by pressing.
[0036] The first driving device 30, the second driving device 10, the third driving device 11, the fourth driving device 33 and the fifth driving device 48 can be electric cylinders, air cylinders or hydraulic cylinders, and those skilled in the art can select them according to actual conditions.
[0037] When using, Fig. 9 and Fig.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 rough 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 located 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, so that the bottom of the valve 3 is also pressed against the sealing flange 25, completing the pre-tightening process of the valve 3. Compared with the traditional technology, the technical solution of this invention is more convenient than the traditional technology. The multi-link rigid connection of the traditional pre-tightening mechanism is replaced, and 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.
[0038] 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 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 blocking the valve, and a sealing flange (25) installed 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 arranged on the top of the valve core (3) and is perpendicular to the valve core (3), the walking mechanism (5) is respectively 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) comprises a limiting guide rail (27), a protective shell (28), a track wheel (29) and a first driving device (30); 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); the first driving device (30) is mounted 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 against 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 is 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) comprises a second push plate (8), a baffle plate (9) and a second driving device (10). The second push plate (8) is fixedly connected to the valve core (3). The baffle plates (9) are 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 plate (9) to move closer to or farther from the second push plate (8).
3. The transversely movable large-diameter vacuum valve according to claim 2 is characterized in that: The sliding mechanism (6) comprises a third driving device (11) and a support frame (12); first sliding blocks (13) are provided at both ends of the support frame (12); sliding grooves (14) for accommodating the first sliding blocks (13) are provided at both sides of the crossbeam (4); when the third driving device (11) drives the support frame (12) to move, the first sliding block (13) slides along the sliding groove (14); At least two crossbeams (4) are provided, and the crossbeams (4) are parallel to each other, and each baffle (9) is installed with at least two second driving 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 is 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 sliding block (16) is fixedly connected to the bottom of the second push plate (8), and a second roller (17) is mounted on the second sliding block (16). When the baffle plate (9) approaches the second push plate (8), the second roller (17) contacts the baffle plate (9) and rolls relative to the baffle plate (9).
5. The transversely movable large-diameter vacuum valve according to claim 1 is characterized in that: Rail clamps (32) are installed at both ends of the walking device (5), and the rail clamps (32) include a shell, a fourth driving device (33) is arranged outside the shell, a first clamping plate (34) and a second clamping plate (35) are arranged in parallel with each other inside the shell, the first clamping plate (34) and the second clamping plate (35) are both rotatably connected to the shell, and 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 threads of the first nut (38) and the second nut (39) have opposite directions, and the screw rod (37) drives the first clamping plate (34) and the second clamping plate (35) to move closer to or farther 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) comprises a second clamping 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 slide groove (43). The second clamping 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 slide groove (43), thereby realizing the rotation of the second clamping claw (40) relative to the ear seat (41).
6. The transversely movable large-diameter vacuum valve according to claim 3 is characterized in that: The multi-joint connection mechanism (18) comprises 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) via a first pin shaft (22); the first joint (19) is rotatably connected to the joint arm (21) via a second pin shaft (23); the second joint (20) is rotatably connected to the joint arm (21) via a third pin shaft (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 is characterized in that: The axis of the first pin shaft (22) is perpendicular to the valve core (3), the axis of the second pin shaft (23) is parallel to the valve core (3), and the axis of the third pin shaft (24) is parallel to the valve core (3).
8. The transversely movable large-diameter vacuum valve according to claim 1 is characterized in that: A flow guide tube (46) is provided on a side of the valve body (45) opposite to the sealing flange (25), and the axis of the flow guide tube (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), and a fifth driving device (48) is provided on the valve body (45). The fifth driving device (48) drives the guide ring (47) to reciprocate 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 inside of the valve body (45); The guide ring (47) is slidably connected to the guide tube (46); 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); 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 is characterized in that: At least two third drive devices (11) are provided, and each crossbeam (4) corresponds to a third drive device (11). At least four first sliding blocks (13) are provided, and a first sliding block (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 two ends of the support frame (12), and each end of the support frame (12) is installed with a multi-joint connection mechanism (18).