Soft sealing butterfly valve

Abstract

The invention discloses a soft sealing butterfly valve which comprises a valve body, a valve rod and a valve plate, the valve plate comprises a fixed disc, a mounting disc, a plurality of movable assemblies, a driving assembly and a flexible sealing sleeve, an annular protrusion is arranged on the fixed disc, the movable assemblies and the annular protrusion are arranged in a sliding mode, and each movable assembly comprises an outer sliding part and an inner sliding part; the outer sliding part comprises arc-shaped blocks and a first sliding rod, the central angles of the multiple arc-shaped blocks are equal, one end of the first sliding rod is fixedly connected with the middle of each arc-shaped block, and the inner sliding part comprises an embedded block and a second sliding rod. The valve body and the arc-shaped block jointly form an outer contour for extruding the flexible sealing sleeve, so that the flexible sealing sleeve deforms among the valve body, the arc-shaped block and the embedded block, the valve is closed, and the valve plate can be prevented from being abraded in the opening and closing process of the valve by adopting the structure.

Description

Technical Field

[0001] The invention discloses a soft-sealing butterfly valve, belonging to the technical field of valves. Background Art

[0002] The butterfly valve has a simple structure, small size, and light weight. It is composed of only a few parts and can be quickly opened and closed by rotating 90°. It is easy to operate. At the same time, the valve has good fluid control characteristics. The butterfly valve's disc is installed in the diameter direction of the pipe. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0° and 90°. When it rotates to 90°, the valve is in the fully open state. When the flange butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body. Therefore, the pressure drop generated by the valve is very small, so it has better flow control characteristics. The cooperation between the valve plate and the valve body of the existing butterfly valve mostly adopts a hard sealing structure. In this way, during the opening and closing of the valve, even if the connection position between the valve plate and the valve stem and the rotation center of the valve plate are eccentrically set, the friction between the valve plate and the valve body is still very large, resulting in the valve plate wearing too quickly during the opening and closing of the valve, which increases the frequency of replacement and maintenance. Flexible sealing is usually used, and a sealing sleeve is usually set on the outside of the valve plate. However, since the size of the valve plate is unchanged, the flexible sealing sleeve is subjected to less extrusion force during actual operation, resulting in poor sealing between the valve plate and the valve body. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems in the prior art and to provide a soft-sealed butterfly valve.

[0004] The present invention achieves the above-mentioned purpose through the following technical scheme: a soft-sealed butterfly valve, comprising a valve body, a valve stem and a valve plate, the valve plate comprising a fixed disk, a mounting disk, a movable component, a drive component and a flexible sealing sleeve, the fixed disk is provided with an annular convexity, the movable component is provided with multiple groups and is slidably arranged with the annular convexity, the movable component comprises an outer sliding member and an inner sliding member, the outer sliding member comprises an arc block and a first sliding rod, the central angles of the multiple arc blocks are equal, one end of the first sliding rod is fixedly connected to the middle of the arc block, the inner sliding member comprises an inlaid block and a second sliding rod, both sides of the inlaid block are parallel to the side surfaces of the two adjacent arc blocks that are in conflict, when the multiple arc blocks conflict with each other to form a complete circular ring, the inlaid block is located on the inner side of the conflicting position of the two adjacent arc blocks, the second sliding rod is fixedly connected to the inlaid block, and the second The sliding rod and the second sliding rod are both slidably arranged with the fixed plate, and the mounting plate is mounted on the annular convexity by bolts, and there is a gap between the mounting plate and the fixed plate for the sliding of the arc block and the inlaid block, and the flexible sealing sleeve covers the outer side of the arc block and the inlaid block, and the fixed plate and the mounting plate are both provided with a fixing ring for fixing the flexible sealing sleeve, and the driving assembly is rotatably mounted on the inner side of the annular convexity, and drives the first sliding rod and the second sliding rod to slide when the driving assembly rotates, and a fixing seat is provided on the side of the fixed plate away from the mounting plate, the valve stem is connected to the fixing seat by bolts, a circulation hole is provided in the valve stem, and an oil supply assembly rotatably connected to the valve stem is installed on the valve body, and an oil storage cavity connected to the circulation hole is provided on the fixing seat and the fixed plate, and the oil supply assembly is connected to the circulation hole and is used to control the pressure of the hydraulic oil in the oil storage cavity.

[0005] 18. The swiftly and minutely adjusting device for a wood-planer working table as claimed in claim 1, wherein said linking rod and said adjusting base are pivotally connected to each other with a bolt, and said bolt has a round shank to contact with said linking rod.

[0006] Preferably, the transmission member includes a transmission rod, a positioning pin and a spring, one end of the transmission rod is slidably arranged with the oil storage chamber, and the other end has a limiting boss slidably arranged with the rotating disk, the cross-section of the limiting boss is a non-circular structure, one end of the spring is respectively connected to the limiting boss, and the first spring applies a force on the limiting boss away from the mounting disk, a first sealing ring is provided on the outer side of the transmission rod, a groove and a pressure ring for installing the positioning pin are provided on the fixed disk, and the pressure ring is located between the positioning pin and the rotating disk, and the circumferential surface of the transmission rod has a third slide groove, and the central angle formed by the two ends of the third slide groove to the center of the transmission rod is equal to the central angle formed by the two ends of the first slide groove to the center of the rotating disk, one end of the positioning pin is located in the groove, and the other end is located in the third slide groove.

[0007] Preferably, an adjustment component for adjusting the spring elastic force is provided in the mounting plate, and the adjustment component includes a movable block and an adjusting bolt. A boss is provided on one side of the mounting plate, and the movable block is slidably provided in the boss. One end of the spring away from the limiting boss is in contact with the movable block, and the adjusting bolt is threadedly connected to the boss, and one end of the adjusting bolt is in contact with the movable block. The center of the boss has a positioning rod located in the spring.

[0008] Preferably, the oil supply assembly includes an oil delivery device, an oil guide pipe, an oil inlet pipe, an oil outlet pipe and a control valve. The oil delivery device is fixed to the valve body, and an oil guide chamber is provided in the oil delivery device. The oil inlet pipe, oil outlet pipe and oil guide pipe are all connected to the oil guide chamber. Two control valves are provided and are respectively installed on the oil inlet pipe and the oil outlet pipe. One end of the oil guide pipe passes through the valve body and is rotatably connected to the valve stem.

[0009] Preferably, sealing assemblies are provided on both sides of the fixing seat, and the sealing assemblies include a pressing plate and a second sealing ring. A recess is provided on the fixing seat, and the second sealing ring is located in the recess. The pressing plate is fixedly connected to the fixing seat by bolts.

[0010] Preferably, a positioning platform is provided on the valve stem, a fixing plate is provided on the valve body, the positioning platform is located between the valve body and the fixing plate, and a handwheel is provided on one end of the valve stem away from the fixing seat.

[0011] Compared with the prior art, the present invention has the following beneficial effects: By arranging a fixed disk, a mounting disk, a movable component, a drive component and a flexible sealing sleeve, the movable component slides on the mounting disk by relying on the drive component and the oil supply component, so that when the arc block and the inlaid block slide in a direction away from the center of the fixed disk, outward tension is generated on the flexible sealing sleeve, and the flexible sealing sleeve is finally squeezed against the inner wall of the valve body, thereby closing the valve and improving the sealing between the valve plate and the valve body. When the valve is opened, the drive component drives the movable component to reset, so that when the valve stem drives the valve plate to rotate, there is a gap between the valve plate and the valve body, so that wear will not be generated to affect the service life of the valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of a soft-sealed butterfly valve of the present invention; Figure 2 This is a cross-sectional view of a soft-sealed butterfly valve of the present invention; Figure 3 Schematic diagram of the structure of the valve stem and valve plate in the present invention; Figure 4 This is a schematic diagram of the structure in which the arc block and the mosaic block conflict with each other in the present invention; Figure 5 It is a schematic structural diagram of the arc block, fixed disk and rotating disk in the present invention; Figure 6 For the present invention Figure 2 A partial enlarged view of point A in the middle; Figure 7 This is a schematic diagram of the structure in which the arc blocks conflict with each other in the present invention; Figure 8 Schematic diagram of the structure of the transmission rod, rotating disk and fixed disk in the present invention; Figure 9 Schematic diagram of the structure of the transmission rod in the present invention; Reference numerals: 1, oil supply assembly; 2, valve body; 3, fixing plate; 4, handwheel; 5, valve stem; 6, second sealing ring; 7, transmission rod; 8, flow hole; 9, fixing plate; 10, oil inlet pipe; 11, oil guide chamber; 12, oil outlet pipe; 13, oil delivery device; 14, movable assembly; 15, spring; 16, mounting plate; 17, pressing plate; 18, flexible sealing sleeve; 19, fixing ring; 20, boss; 21, adjusting bolt; 22, positioning platform; 23, second latch; 24 , second sliding rod; 25, mosaic block; 26, rotating disk; 27, arc block; 28, first sliding rod; 29, first slide groove; 30, second slide groove; 31, first latch; 32, annular convex; 33, second inclined section; 34, second circular arc section; 35, first circular arc section; 36, first inclined section; 37, limiting boss; 38, pressure ring; 39, positioning pin; 40, third slide groove; 41, fixed seat; 42, first sealing ring; 43, oil guide pipe; 44, movable block. DETAILED DESCRIPTION

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0014] like Figures 1-9 As shown, a soft-sealed butterfly valve includes a valve body 2, a valve stem 5 and a valve plate. The valve plate includes a fixed disk 9, a mounting disk 16, a movable component 14, a drive component and a flexible sealing sleeve 18. The fixed disk 9 is provided with an annular protrusion 32. The movable component 14 is provided with multiple groups and is slidably arranged with the annular protrusion 32. The movable component 14 includes an outer sliding member and an inner sliding member. The outer sliding member includes an arc block 27 and a first sliding rod 28. The central angles of the multiple arc blocks 27 are equal. One end of the first sliding rod 28 is fixedly connected to the middle of the arc block 27. The inner sliding member includes an inlaid block 25 and a second sliding rod 24. The two sides of the inlaid block 25 are parallel to the sides that contact the two adjacent arc blocks 27. When the multiple arc blocks 27 contact each other to form a complete circular ring, the inlaid block 25 is located on the inner side of the contact position of the two adjacent arc blocks 27. The second sliding rod 24 is fixedly connected to the inlaid block 25, and the second sliding rod 24 and the second sliding rod The movable rods are all slidably arranged with the fixed plate 9, and the mounting plate 16 is mounted on the annular convexity 32 by bolts. There is a gap between the mounting plate 16 and the fixed plate 9 for the sliding of the arc block 27 and the mosaic block 25, and the flexible sealing sleeve 18 is covered on the outer side of the arc block 27 and the mosaic block 25. The fixed plate 9 and the mounting plate 16 are both provided with a fixing ring 19 for fixing the flexible sealing sleeve 18. The driving assembly is rotatably mounted on the inner side of the annular convexity 32, and drives the first sliding rod 28 and the second sliding rod to slide when the driving assembly rotates. A fixing seat 41 is provided on the side of the fixed plate 9 away from the mounting plate 16, and the valve stem 5 is connected to the fixing seat 41 by bolts. A flow hole 8 is provided in the valve stem 5, and an oil supply assembly 1 rotatably connected to the valve stem 5 is installed on the valve body 2. The fixing seat 41 and the fixed plate 9 have an oil storage chamber connected to the flow hole 8. The oil supply assembly 1 is connected to the flow hole 8 and is used to control the pressure of the hydraulic oil in the oil storage chamber.

[0015] The driving assembly includes a rotating disk 26, a first latch 31, a second latch 23 and a transmission member. The number of the first latch 31 and the second latch 23 is equal to the number of the movable assembly 14. The rotating disk 26 is rotatably arranged with the fixed disk 9, and the rotating disk 26 has a plurality of first slide grooves 29 and second second slide grooves 30. The first slide groove 29 includes a first inclined section 36 and a first arc section 35, and the second slide groove 30 includes a second inclined section 33 and a second arc section 34. The central angles formed by the two ends of the first slide groove 29 and the second slide groove 30 and the center of the fixed disk 9 are equal, and the central angles formed by the two ends of the inclined sections and the arc sections in the first slide groove 29 and the second slide groove 30 and the fixed disk 9 are equal. One end of the first latch 31 is fixed on the first sliding rod 28, and the other end is located at In the first slide groove 29, one end of the second latch 23 is fixed on the second sliding rod 24, and the other end is located in the second slide groove 30. The distance from the second latch 23 to the center of the fixed disk 9 is greater than the distance from the first latch 31 to the center of the fixed disk 9. When the two adjacent arc blocks 27 conflict with each other, the first latch 31 on the first sliding rod 28 is located at the starting point of the first inclined section 36, and the second latch 23 on the second sliding rod 24 is located at the starting point of the second arc section 34. The transmission member is installed in the center of the rotating disk 26. When the side surfaces of all the arc blocks 27 are in a state of conflict with each other, the flexible sealing sleeve 18 is not subjected to the outward tension of the arc blocks 27 and the inlaid blocks 25, and the flexible sealing sleeve 18 does not contact the valve body 2. In this way, the valve plate will not contact the valve body 2 during the rotation of the valve. The valve body 2 generates friction, and when the valve plate rotates to a state perpendicular to the fluid flow direction in the valve body 2, the transmission member drives the first sliding rod 28 and the second sliding rod 24 to start sliding successively. In the specific process, when the rotating disk 26 rotates, the first latch 31 first slides along the first inclined section 36, so that the first latch 31 drives the first sliding rod 28 and the arc block 27 to slide away from the center of the fixed disk 9, while the second latch 23 slides along the second arc section 34. At this time, the distance between the second latch 23 and the center of the fixed disk 9 remains unchanged, so that when the arc block 27 slides, the mosaic block 25 remains stationary. When the arc block 27 slides to the position farthest from the center of the fixed disk 9, the second latch 23 starts to slide along the second inclined section 33 and drives the second The sliding rod 24 and the mosaic block 25 slide in the direction away from the center of the fixed disk 9. At this time, the first latch 31 slides in the first arc segment 35, so that the first sliding rod 28 and the arc block 27 remain stationary. Finally, the mosaic block 25 slides between the two arc blocks 27. In this way, the arc block 27 and the mosaic block 25 generate outward tension on the flexible sealing sleeve 18, and finally squeeze the flexible sealing sleeve 18 onto the valve body 2 to produce deformation, thereby closing the valve. When the valve needs to be opened, the transmission rod 7 is no longer subjected to thrust. At the same time, the elastic force applied by the spring 15 to the transmission rod 7 causes the transmission rod 7 to move in the direction away from the center of the mounting disk 16. In this way, the transmission rod 7 drives the rotating disk 26 to rotate in the opposite direction, so that the second latch 23 first slides along the second inclined section 33.The second sliding rod 24 drives the mosaic block 25 to slide toward the center of the fixed disk 9, while the first latch 31 slides along the first arc segment 35. This way, the first sliding rod 28 and mosaic block 25 remain stationary. When the first latch 31 slides along the first inclined segment 36, the first sliding rod 28 drives the arc block 27 to slide back toward the center of the fixed disk 9. This prevents wear between the valve plate and the valve body 2 when the valve is opened.

[0016] The transmission member includes a transmission rod 7, a positioning pin 39 and a spring 15. One end of the transmission rod 7 is slidably arranged with the oil storage chamber, and the other end has a limiting boss 37 slidably arranged with the rotating disk 26. The cross-section of the limiting boss 37 is a non-circular structure. One end of the spring 15 is respectively engaged with the limiting boss 37, and the first spring 15 exerts a force on the limiting boss 37 away from the mounting plate 16. A first sealing ring 42 is provided on the outer side of the transmission rod 7, and a groove and a pressure ring 38 for installing the positioning pin 39 are provided on the fixed plate 9. The pressure ring 38 is located between the positioning pin 39 and the rotating disk 26. The circumferential surface of the transmission rod 7 has a third slide groove 40. The central angle formed by the two ends of the third slide groove 40 to the center of the transmission rod 7 is equal to the central angle formed by the two ends of the first slide groove 29 to the center of the rotating disk 26. One end of the positioning pin 39 is located in the groove, and the other end is located in the third slide groove 40. During the actual installation process, the spring 15 The elastic force applied to the transmission rod 7 makes the distance between the limit boss 37 and the center of the mounting plate 16 at the maximum state, and one end of the positioning pin 39 is located at the opening of the third slide groove 40. When the transmission rod 7 is away from the limit boss 37 and is subjected to the thrust, the spring 15 begins to compress. Since the positioning pin 39 remains stationary under the limiting action of the pressure ring 38, the transmission rod 7 relies on the cooperation of the positioning pin 39 and the third slide groove 40 to rotate a certain angle during the sliding process, thereby allowing the transmission rod 7 to drive the rotating disk 26 to rotate synchronously. When the thrust applied to the transmission rod 7 disappears, the elastic force of the spring 15 makes the transmission rod 7 slide in the direction away from the center of the mounting plate 16, so that the transmission rod 7 drives the rotating disk 26 to rotate in the opposite direction by a certain angle, so that the rotating disk 26 can drive the first sliding rod 28 and the second sliding rod 24 to slide back and forth to open or close the valve.

[0017] The adjusting screw 21 is threadedly connected to the boss 20, and one end of the adjusting screw 21 conflicts with the movable block 44. The center of the boss 20 has a positioning rod located in the spring 15. By rotating the adjusting screw 21, one end of the adjusting screw 21 drives the movable block 44 to slide in the boss 20, so that the length of the spring 15 can be changed, thereby adjusting the elastic force of the spring 15 on the transmission rod 7. In this way, it can be ensured that the transmission rod 7 slides away from the center of the mounting plate 16 when subjected to the elastic force, and can smoothly drive the rotating disk 26 to rotate. The positioning rod can position the position of the spring 15, so that the spring 15 will not be misaligned or bent during the compression process.

[0018] The oil supply assembly 1 includes an oil delivery device 13, an oil guide pipe 43, an oil inlet pipe 10, an oil outlet pipe 12 and a control valve. The oil delivery device 13 is fixed to the valve body 2, and an oil guide cavity 11 is provided in the oil delivery device 13. The oil inlet pipe 10, the oil outlet pipe 12 and the oil guide pipe 43 are all connected to the oil guide cavity 11. There are two control valves, which are respectively installed on the oil inlet pipe 10 and the oil outlet pipe 12. One end of the oil guide pipe 43 passes through the valve body 2 and is rotatably connected to the valve stem 5. One end of the oil inlet pipe 10 is connected to an external oil pump, and the oil pump delivers hydraulic oil to the inlet pipe 10. The oil pipe 10 and the control valve can control the inflow and outflow of the hydraulic oil in the oil guide chamber 11. When the hydraulic oil is introduced into the oil guide chamber 11 through the oil inlet pipe 10, the hydraulic oil enters the oil storage chamber through the flow hole 8. The hydraulic oil generates a thrust on the transmission rod 7, so that the transmission rod 7 drives the rotating disk 26 to rotate. When the control valve on the oil inlet pipe 10 is closed and the control valve on the oil outlet pipe 12 is opened, the hydraulic oil in the oil storage chamber flows out from the oil outlet pipe 12. In this way, the transmission rod 7 drives the rotating disk 26 to rotate in the opposite direction under the elastic force of the spring 15.

[0019] Sealing assemblies are provided on both sides of the fixed seat 41, and the sealing assemblies include a pressing piece 17 and a second sealing ring 6. A recessed groove is provided on the fixed seat 41, and the second sealing ring 6 is located in the recessed groove. The pressing piece 17 is fixedly connected to the fixed seat 41 by bolts. By providing the pressing piece 17 and the second sealing ring 6, after both are installed on the fixed seat 41, the extrusion force generated by the pressing piece 17 on the second sealing ring 6 causes the second sealing ring 6 to deform, thereby ensuring that the hydraulic oil and the fluid leak and mix.

[0020] A positioning platform 22 is provided on the valve stem 5, and a fixing plate 3 is provided on the valve body 2. The positioning platform 22 is located between the valve body 2 and the fixing plate 3. A handwheel 4 is provided at the end of the valve stem 5 away from the fixing seat 41. The valve stem 5 cannot move up and down due to the positioning platform 22, and the valve stem 5 can be driven to rotate by turning the handwheel 4, so that the valve stem 5 can drive the valve plate to rotate, thereby opening or closing the valve.

[0021] Working principle: When the valve is open, the valve plate remains parallel to the direction of fluid flow. At this time, the flexible sealing sleeve 18 does not contact the inner wall of the valve body 2. When the valve needs to be closed, the hand wheel 4 is turned to make the valve stem 5 drive the valve plate to rotate 90 degrees first, then the control valve on the oil inlet pipe 10 is opened, and the control valve on the oil outlet pipe 12 is closed. The external oil pump delivers hydraulic oil from the oil inlet pipe 10 to the oil storage chamber, and relies on the hydraulic oil to push the transmission rod 7. During the sliding process of the transmission rod 7, with the cooperation of the positioning pin 39 and the third slide groove 40, the transmission rod 7 While the movable rod 7 slides in the direction close to the center of the mounting plate 16, it rotates a certain angle, so that the transmission rod 7 drives the rotating plate 26 to rotate synchronously by relying on the limiting boss 37. In this way, the first latch 31 slides along the first inclined section 36 and drives the arc block 27 to slide in the direction away from the center of the fixed plate 9 until the arc block 27 squeezes the flexible sealing sleeve 18 on the valve body 2. Then the second latch 23 slides along the second inclined section 33 and drives the mosaic block 25 to slide between the two arc blocks 27 until the flexible sealing sleeve 18 in the remaining positions is squeezed. On the valve body 2, the inlaid block 25 and the arc block 27 form an outer contour that is close to a circle. When the flexible sealing sleeve 18 has a thickness of appropriate size, the flexible sealing sleeve 18 is squeezed by the inlaid block 25 and the arc block 27 and deformed to adapt to the inner wall of the valve body 2, so that the valve can be completely closed. When the valve needs to be opened again, the control valve on the oil outlet pipe 12 is opened to allow the hydraulic oil in the oil storage chamber to flow out from the oil outlet pipe 12. In this way, the hydraulic oil pressure in the oil storage chamber drops, and the transmission rod 7 is reset under the elastic force of the spring 15. , so that the transmission rod 7 drives the rotating disk 26 to rotate in the opposite direction, and the second sliding rod 24 drives the mosaic block 25 to start sliding toward the center of the fixed disk 9, and then the first sliding rod 28 drives the arc block 27 to slide toward the center of the fixed disk 9, so that the flexible sealing sleeve 18 is no longer subjected to the extrusion force of the arc block 27 and the mosaic block 25, and the flexible sealing sleeve 18 is not in contact with the valve body 2. Then, by turning the handwheel 4, the valve stem 5 drives the valve plate to rotate 90°, and the valve can be opened. There is no wear on the valve plate and the valve body 2, which effectively extends the service life of the valve.

[0022] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0023] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A soft-sealed butterfly valve, comprising a valve body (2), a valve stem (5) and a valve plate, characterized in that: The valve plate includes a fixed disk (9), a mounting disk (16), a movable assembly (14), a drive assembly and a flexible sealing sleeve (18). The fixed disk (9) is provided with an annular protrusion (32). The movable assembly (14) is provided with multiple groups and is slidably arranged with the annular protrusion (32). The movable assembly (14) includes an outer sliding member and an inner sliding member. The outer sliding member includes an arc block (27) and a first sliding rod (28). The central angles of the multiple arc blocks (27) are equal. One end of the first sliding rod (28) is aligned with the arc block (27). The inner sliding member comprises an inlay block (25) and a second sliding rod (24), both sides of the inlay block (25) are parallel to the sides of the two adjacent arc blocks (27) that abut against each other, and when a plurality of arc blocks (27) abut against each other to form a complete ring, the inlay block (25) is located on the inner side of the abutting position of the two adjacent arc blocks (27), the second sliding rod (24) is fixedly connected to the inlay block (25), and the second sliding rod (24) and the second sliding rod (24) are both slidably arranged with the fixed plate (9), and the mounting plate (16) is mounted on the annular protrusion (32) by bolts, and a gap is provided between the mounting plate (16) and the fixed plate (9) for sliding the arc block (27) and the mosaic block (25), and the flexible sealing sleeve (18) is covered on the outside of the arc block (27) and the mosaic block (25), and the fixed plate (9) and the mounting plate (16) are both provided with a fixing ring (19) for fixing the flexible sealing sleeve (18), and the driving assembly is rotatably mounted on the inner side of the annular protrusion (32), and drives the first sliding rod (28) and the second sliding rod (28) when the driving assembly rotates. The sliding rod (24) slides, and a fixing seat (41) is provided on a side of the fixed plate (9) away from the mounting plate (16). The valve stem (5) is connected to the fixing seat (41) by bolts. A circulation hole (8) is provided in the valve stem (5). An oil supply component (1) rotatably connected to the valve stem (5) is installed on the valve body (2). The fixing seat (41) and the fixed plate (9) have an oil storage cavity connected to the circulation hole (8). The oil supply component (1) is connected to the circulation hole (8) and is used to control the pressure of the hydraulic oil in the oil storage cavity.

2. A soft-sealed butterfly valve according to claim 1, characterized in that: The driving assembly includes a rotating disk (26), a first latch (31), a second latch (23) and a transmission member, the number of the first latch (31) and the second latch (23) is equal to the number of the movable assembly (14), the rotating disk (26) is rotatably arranged with the fixed disk (9), and the rotating disk (26) has a plurality of first chutes (29) and second second chutes (30), the first chutes (29) include a first inclined section (36) and a first arc section (35), the second chutes (30) include a second inclined section (33) and a second arc section (34), the central angles formed by the two ends of the first chutes (29) and the second chutes (30) and the center of the fixed disk (9) are equal, the inclined sections in the first chutes (29) and the second chutes (30) are equal to the central angles formed by the two ends of the first chutes (29) and the second chutes (30) The central angle formed by the two ends of the arc segment and the fixed disk (9) is equal, one end of the first latch (31) is fixed on the first sliding rod (28), and the other end is located in the first slide groove (29), one end of the second latch (23) is fixed on the second sliding rod (24), and the other end is located in the second slide groove (30), the distance from the second latch (23) to the center of the fixed disk (9) is greater than the distance from the first latch (31) to the center of the fixed disk (9), when two adjacent arc blocks (27) conflict with each other, the first latch (31) on the first sliding rod (28) is located at the starting point of the first inclined section (36), the second latch (23) on the second sliding rod (24) is located at the starting point of the second arc segment (34), and the transmission member is installed at the center of the rotating disk (26).

3. A soft-sealed butterfly valve according to claim 2, characterized in that: The transmission member includes a transmission rod (7), a positioning pin (39) and a spring (15). One end of the transmission rod (7) is slidably arranged with the oil storage chamber, and the other end has a limiting boss (37) slidably arranged with the rotating disk (26). The cross section of the limiting boss (37) is a non-circular structure. One end of the spring (15) is respectively connected to the limiting boss (37), and the first spring (15) applies a force to the limiting boss (37) away from the mounting disk (16). A first sealing ring (42) is provided on the outer side of the transmission rod (7). The fixed disk (9) is provided with a groove and a pressure ring (38) for installing a positioning pin (39), and the pressure ring (38) is located between the positioning pin (39) and the rotating disk (26). The circumferential surface of the transmission rod (7) has a third slide groove (40), and the central angle formed by the two ends of the third slide groove (40) to the center of the transmission rod (7) is equal to the central angle formed by the two ends of the first slide groove (29) to the center of the rotating disk (26). One end of the positioning pin (39) is located in the groove, and the other end is located in the third slide groove (40).

4. A soft-sealed butterfly valve according to claim 3, characterized in that: An adjusting assembly for adjusting the elastic force of the spring (15) is provided in the mounting plate (16), and the adjusting assembly includes a movable block (44) and an adjusting bolt (21). A boss (20) is provided on one side of the mounting plate (16), and the movable block (44) is slidably provided in the boss (20). One end of the spring (15) away from the limiting boss (37) abuts against the movable block (44). The adjusting bolt (21) is threadedly connected to the boss (20), and one end of the adjusting bolt (21) abuts against the movable block (44). The center of the boss (20) has a positioning rod located in the spring (15).

5. The soft-sealed butterfly valve according to claim 1, characterized in that: The oil supply assembly (1) comprises an oil delivery device (13), an oil guide pipe (43), an oil inlet pipe (10), an oil outlet pipe (12) and a control valve. The oil delivery device (13) is fixed on the valve body (2), and an oil guide chamber (11) is provided in the oil delivery device (13). The oil inlet pipe (10), the oil outlet pipe (12) and the oil guide pipe (43) are all connected to the oil guide chamber (11). Two control valves are provided and are respectively installed on the oil inlet pipe (10) and the oil outlet pipe (12). One end of the oil guide pipe (43) passes through the valve body (2) and is rotatably connected to the valve stem (5).

6. A soft-sealed butterfly valve according to claim 5, characterized in that: Sealing assemblies are provided on both sides of the fixing seat (41), and the sealing assemblies include a pressing plate (17) and a second sealing ring (6). A recessed groove is provided on the fixing seat (41), and the second sealing ring (6) is located in the recessed groove. The pressing plate (17) is fixedly connected to the fixing seat (41) by bolts.

7. The soft-sealed butterfly valve according to claim 1, characterized in that: A positioning platform (22) is provided on the valve stem (5), a fixing plate (3) is provided on the valve body (2), the positioning platform (22) is located between the valve body (2) and the fixing plate (3), and a handwheel (4) is provided at one end of the valve stem (5) away from the fixing seat (41).

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