Enhanced metal hard-to-hard butterfly valve and wear-resistant structure

Abstract

The invention belongs to the field of butterfly valves, and particularly relates to an enhanced metal hard-to-hard butterfly valve and a wear-resistant structure, the enhanced metal hard-to-hard butterfly valve comprises a valve body, a butterfly plate is rotatably connected in the valve body, the rear end of the butterfly plate is fixedly connected with two groups of valve shafts, the adjacent sides of the two groups of valve shafts are fixedly connected with a fixed shell, and the fixed shell is fixedly connected to the rear end of the butterfly plate; a containing groove is formed in the side edge of the butterfly plate, four sets of sealing plates are slidably connected into the containing groove, and sealing mechanisms are arranged on the sealing plates. Through the structural design of the sealing mechanism, when the butterfly plate is in a closed state, the four groups of sealing plates contained in the containing groove can abut against the inner wall of the valve body, so that the sealing effect of the butterfly plate and the inner wall of the valve body is improved through abutting of the four groups of sealing plates and the inner wall of the valve body, and even if the edge of the butterfly plate is greatly abraded, the sealing effect of the butterfly plate and the inner wall of the valve body is improved. And the sealing effect can be continuously achieved through the sealing plate, so that the service life of the butterfly plate is prolonged, and the valve body can work for a long time.

Description

Technical Field

[0001] The present invention relates to the field of butterfly valves, in particular to an enhanced metal hard-to-hard butterfly valve and a wear-resistant structure. Background Art

[0002] The hard-on-hard butterfly valve is also called the metal hard-sealed butterfly valve, which achieves sealing through direct contact of metal materials. The enhanced metal hard-on-hard butterfly valve is an improvement on the above butterfly valve, which is enhanced in design and materials to meet more demanding working environments.

[0003] The closure of the valve body is connected with the closure of the valve body by a threaded connection, and the closure of the valve body is connected with the closure of the valve body by a threaded connection.

[0004] However, the hard-on-hard butterfly valve in the above technology adopts hard-on-hard sealing, so during the closing and opening process, the butterfly plate will inevitably rub against the inner wall of the valve body, thereby causing wear on the butterfly plate sealing surface. Once the butterfly plate sealing surface is severely worn, the sealing effect between the butterfly plate sealing surface and the inner wall of the valve body will deteriorate, and it needs to be replaced in time; therefore, in order to solve the above problem, an enhanced metal hard-on-hard butterfly valve and a wear-resistant structure are proposed. Summary of the invention

[0005] In order to solve the problem of the hard-on-hard butterfly valve in the above technology, since the butterfly valve adopts a hard-on-hard seal, the butterfly plate will inevitably rub against the inner wall of the valve body during the closing and opening process, thereby causing wear on the butterfly plate sealing surface. Once the butterfly plate sealing surface is severely worn, the sealing effect between the butterfly plate sealing surface and the inner wall of the valve body will deteriorate, and it is necessary to replace it in time. The present invention proposes an enhanced metal hard-on-hard butterfly valve and a wear-resistant structure.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the enhanced metal hard-to-hard butterfly valve described in the present invention includes a valve body, a butterfly plate is rotatably connected inside the valve body, and two groups of valve shafts are fixedly connected to the rear end of the butterfly plate. The adjacent sides of the two groups of valve shafts are fixedly connected to the fixed shell, and the fixed shell is fixedly connected to the rear end of the butterfly plate. A receiving groove is provided on the side of the butterfly plate, and four groups of sealing plates are slidably connected inside the receiving groove. A sealing mechanism is provided on the sealing plate, and the sealing mechanism is used to push the four groups of sealing plates so that the sealing plates can abut against the inner wall of the valve body, thereby improving the sealing effect between the valve body and the butterfly plate. A connecting mechanism is provided inside the butterfly plate, and the connecting mechanism is used to drive the rotating disk to rotate and ensure that the rotating disk will not rotate in the opposite direction when the sealing plate abuts against the inner wall of the valve body. A pushing mechanism is provided at the front end of the butterfly plate, and the pushing mechanism is used to drive the connecting gear to rotate, so that the extension and storage of the sealing plate can be synchronized with the closing and opening of the butterfly plate.

[0007] Preferably, the sealing mechanism includes a sealing plate, the sealing plate is designed in an arc shape, the sealing plate is fixedly connected to the moving block on the side away from the inner wall of the valve body, the moving block is slidably connected to the inside of the through groove, the through groove is arranged on the receiving groove, the through groove is communicated with the inside of the butterfly plate, the moving block is fixedly connected with sliding blocks on both sides, the sliding blocks are slidably connected to the inside of the slide groove, the slide groove is arranged on the inner wall of the through groove, the moving block is fixedly connected with a connecting spring on the side away from the sealing plate, the connecting spring is fixedly connected with a connecting block on the side away from the moving block, the connecting block is slidably connected to the inside of the through groove, the connecting block is fixedly connected to the side away from the connecting spring with a sliding column, the sliding column is slidably connected to a guide groove, the guide groove is arranged on a rotating disk, the lengths of the four groups of sealing plates are all greater than one-quarter of a circle, and two adjacent groups of sealing plates are in contact with each other.

[0008] Preferably, the connecting mechanism includes a first gear, the first gear is fixedly connected to a rotating disk, the rotating disk is rotatably connected to the inside of the butterfly plate, the first gear is meshed with a second gear, the second gear is fixedly connected to a fixed shaft, a worm gear is fixedly connected to the fixed shaft, the worm gear is located at the rear end of the second gear, the fixed shaft is rotatably connected to the inner wall of the fixed shell, the worm gear is meshed with a worm, the top and bottom ends of the worm are both rotatably connected to the inner wall of the fixed shell, and a connecting gear is fixedly connected to the worm near the bottom end.

[0009] Preferably, the pushing mechanism includes a movable plate, which is slidably connected to the inside of the movable groove, the movable groove is opened at the front end of the butterfly plate, an installation groove is opened on the inner wall of the movable groove, a mounting ring is slidably connected to the inside of the mounting groove, and the mounting ring is fixedly connected to the movable plate, four groups of circular grooves are opened at the rear end of the movable plate, a support spring is fixedly connected to the inner wall of the circular groove, the rear end of the support spring is fixedly connected to the inner wall of the movable groove, a rack is fixedly connected to the rear end of the movable plate, the rack is meshed with a connecting gear, the rack passes through a rectangular hole, the rectangular hole is opened on the inner wall of the movable groove, the rear end of the rack is inserted into the sliding groove, and the sliding groove is opened on the rotating disk.

[0010] Preferably, a guide rod is inserted into the rack, a plug hole corresponding to the guide rod is opened inside the rack, and the rear end of the guide rod is fixedly connected to the inner wall of the fixed shell.

[0011] Preferably, a mounting groove is provided on the sealing plate, and a rubber strip is fixedly connected to the mounting groove.

[0012] Preferably, the mounting ring is penetrated by a plurality of sets of fixing columns, and the front and rear sides of the fixing columns are fixedly connected to the inner wall of the mounting groove.

[0013] Preferably, a cushion block is fixedly connected to one side of the inner wall of the sliding groove, and the cushion block is made of rubber material.

[0014] Preferably, two groups of sealing rings are fixedly connected to the inner wall of the installation groove, one group of the sealing rings abuts against one side of the installation ring, the cross section of the sealing ring is trapezoidal in design, and the installation ring is provided with an inclined surface.

[0015] The wear-resistant structure of the enhanced metal hard-on-hard butterfly valve comprises a fixing ring which is fixedly connected to the front end of the butterfly plate and has a trapezoidal cross section.

[0016] The present invention is beneficial in that: 1. The present invention adopts the structural design of the sealing mechanism. When the butterfly plate is in the closed state, the four groups of sealing plates stored in the storage groove will abut against the inner wall of the valve body, thereby improving the sealing effect between the butterfly plate and the inner wall of the valve body through the abutment between the four groups of sealing plates and the inner wall of the valve body, so that even if the edge of the butterfly plate is greatly worn, the sealing plate can continue to play a sealing effect, thereby extending the service life of the butterfly plate, so that the valve body can work for a long time, and solves the problem of hard-to-hard butterfly valve in the prior art. Since the butterfly valve adopts hard-to-hard sealing, the butterfly plate will inevitably rub against the inner wall of the valve body during closing and opening, thereby causing wear on the sealing surface of the butterfly plate. Once the sealing surface of the butterfly plate is greatly worn, the sealing effect between the sealing surface of the butterfly plate and the inner wall of the valve body will deteriorate, and it will need to be replaced in time.

[0017] 2. The present invention adopts the structural design of the connecting mechanism, and the rotation of the connecting gear will be transmitted to the worm, and the worm drives the worm wheel to drive the first gear to rotate. The second gear and the worm wheel are both connected to the fixed shaft, so they will rotate synchronously, thereby driving the rotating disk to rotate through the engagement of the second gear and the first gear. The self-locking of the worm wheel and the worm can ensure that the rotating disk will not drive the second gear to rotate in the reverse direction, thereby ensuring that the four sets of sealing plates will not be re-stored into the storage groove due to minor vibrations when extended, so that the sealing plates can maintain contact with the inner wall of the valve body.

[0018] 3. The present invention adopts the structural design of the pushing mechanism. When the butterfly plate is in the closed state, the pressure on the surface of the movable plate by the fluid inside the valve body is the greatest. Therefore, the movable plate will be received in the movable groove, and the rack fixed on the rear end of the movable plate will move together, thereby driving the connecting gear to rotate through the rack, so that the four groups of sealing plates can extend from the inside of the receiving groove. When the butterfly plate is opened, the pressure on the surface of the movable plate will decrease, and the movable plate can be reset to allow the rack to drive the connecting gear to move in the opposite direction, and the four groups of sealing plates can also be received in the receiving groove, so as to control the extension of the sealing plate by opening and closing the butterfly plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a structural schematic diagram of the rear end of the butterfly plate of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the butterfly plate of the present invention; Figure 4 for Figure 3 A partial enlarged view of the middle A; Figure 5 for Figure 3 A partial enlarged view of point B in the middle; Figure 6 It is a structural schematic diagram of the rotating disk of the present invention; Figure 7 It is a structural schematic diagram of the connection mechanism of the present invention; Figure 8 It is a schematic diagram of the connection structure of the connection block of the present invention; Fig. 9 It is a schematic diagram of the structure inside the movable groove of the present invention.

[0021] In the figure: 1, valve body; 20, butterfly plate; 21, valve shaft; 22, fixed shell; 23, storage groove; 24, through groove; 25, rubber strip; 26, sealing plate; 27, slider; 28, slide groove; 29, connecting spring; 30, connecting block; 31, long groove; 32, moving block; 33, sliding column; 34, rotating disk; 35, guide groove; 36, first gear; 37, second gear; 38, worm wheel; 39, fixed shaft; 40, worm; 41, connecting gear; 42, guide rod; 43, rack; 44, circular groove; 45, support spring; 46, mounting ring; 47, movable plate; 48, movable groove; 49, mounting groove; 50, rectangular hole; 51, fixing ring; 52, cushion block; 53, sliding groove; 55, sealing ring; 56, fixed column. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0023] Embodiment 1

[0024] See also Figure 1 - Fig. 9 As shown, the enhanced metal hard-to-hard butterfly valve comprises a valve body 1, wherein a butterfly plate 20 is rotatably connected inside the valve body 1, and two groups of valve shafts 21 are fixedly connected to the rear end of the butterfly plate 20, and the adjacent sides of the two groups of valve shafts 21 are fixedly connected to a fixed housing 22, and the fixed housing 22 is fixedly connected to the rear end of the butterfly plate 20, and a receiving groove 23 is provided on the side of the butterfly plate 20, and four groups of sealing plates 26 are slidably connected inside the receiving groove 23, and a sealing mechanism is provided on the sealing plate 26, and the sealing mechanism is used to push the four groups of sealing plates 26, so that the sealing plate 26 and the inner wall of the valve body 1 can be abutted together, thereby improving the sealing effect between the valve body 1 and the butterfly plate 20, the butterfly plate 20 is provided with a connecting mechanism inside, the connecting mechanism is used to drive the rotating disk 34 to rotate and ensure that the rotating disk 34 does not rotate in the opposite direction when the sealing plate 26 abuts against the inner wall of the valve body 1, and the front end of the butterfly plate 20 is provided with a pushing mechanism, the pushing mechanism is used to drive the connecting gear 41 to rotate, so that the extension and storage of the sealing plate 26 can be synchronized with the closing and opening of the butterfly plate 20; Further, the sealing mechanism includes a sealing plate 26, the sealing plate 26 is designed in an arc shape, the side of the sealing plate 26 away from the inner wall of the valve body 1 is fixedly connected to the moving block 32, the moving block 32 is slidably connected to the inside of the through groove 24, the through groove 24 is opened on the receiving groove 23, the through groove 24 is connected to the inside of the butterfly plate 20, the two sides of the moving block 32 are fixedly connected with sliders 27, the slider 27 is slidably connected to the inside of the slide groove 28, the slide groove 28 is opened on the inner wall of the through groove 24, and the moving block 3 A connecting spring 29 is fixedly connected to the side away from the sealing plate 26, and a connecting block 30 is fixedly connected to the side away from the moving block 32 of the connecting spring 29. The connecting block 30 is slidably connected inside the through groove 24. A sliding column 33 is fixedly connected to the side away from the connecting spring 29 of the connecting block 30. The sliding column 33 is slidably connected to the guide groove 35. The guide groove 35 is provided on the rotating disk 34. The lengths of the four groups of sealing plates 26 are all greater than a quarter of a circle, and two adjacent groups of sealing plates 26 are in contact with each other. Through the structural design of the sealing mechanism, when the butterfly plate 20 is in the closed state, the four sets of sealing plates 26 stored in the receiving groove 23 will abut against the inner wall of the valve body 1, thereby improving the sealing effect between the butterfly plate 20 and the inner wall of the valve body 1 through the abutment of the four sets of sealing plates 26 with the inner wall of the valve body 1, so that even if the edge of the butterfly plate 20 is greatly worn, it can continue to play a sealing effect through the sealing plate 26, thereby extending the service life of the butterfly plate 20, so that the valve body 1 can work for a long time, and the rear end of the butterfly plate 20 is connected to the two sets of valve shafts. The two valve shafts 21 are connected together, and the two valve shafts 21 are used to ensure the normal rotation of the butterfly plate 20 inside the valve body 1, and the two valve shafts 21 are connected together with the fixed housing 22, and the fixed housing 22 is used to expand the space inside the butterfly plate 20. When working, when the connecting block 30 slides inside the through groove 24, since the moving block 32 is connected to the connecting block 30 through the connecting spring 29, and the slider 27 fixed on the moving block 32 slides inside the slide groove 28, the connecting block 30 will first push the moving block 32 to slide inside the through groove 24. When the slider 27 slides to the maximum position in the slide groove 28 and abuts against the inner wall of the slide groove 28, the continued movement of the connecting block 30 will squeeze the connecting spring 29 until the connecting spring 29 is compressed to the minimum length, and the side of the moving block 32 away from the connecting spring 29 is connected to the sealing plate 26 and the sealing plate 26 is received in the receiving groove 23. When the connecting spring 29 is compressed, the sealing plate 26 will extend from the inside of the receiving groove 23 to abut against the inner wall of the valve body 1. Extrusion is used to ensure that the sealing plate 26 is in close contact with the inner wall of the valve body 1. Since the slider 27 can move a short distance inside the slide groove 28, the sealing plate 26 will only extend a short distance from the inside of the receiving groove 23 to facilitate the abutment between the sealing plate 26 and the inner wall of the valve body 1. The sealing plate 26 is designed to be arc-shaped and the length of the sealing plate 26 is greater than one-quarter of the arc. The two adjacent groups of sealing plates 26 are not only in contact but also staggered with each other to ensure that the four groups of sealing plates 26 can be smoothly received in the receiving groove 23.

[0025] Further, the connecting mechanism includes a first gear 36, the first gear 36 is fixedly connected to the rotating disk 34, the rotating disk 34 is rotatably connected to the inside of the butterfly plate 20, the first gear 36 is meshed with a second gear 37, the second gear 37 is fixedly connected to a fixed shaft 39, a worm gear 38 is fixedly connected to the fixed shaft 39, the worm gear 38 is located at the rear end of the second gear 37, the fixed shaft 39 is rotatably connected to the inner wall of the fixed housing 22, the worm gear 38 is meshed with a worm 40, the top and bottom ends of the worm 40 are both rotatably connected to the inner wall of the fixed housing 22, and a connecting gear 41 is fixedly connected to the position of the worm 40 near the bottom end; Through the structural design of the connecting mechanism, the rotation of the connecting gear 41 will be transmitted to the worm 40, and the worm 40 drives the worm wheel 38 to drive the first gear 36 to rotate. The second gear 37 and the worm wheel 38 are both connected to the fixed shaft 39, so they will rotate synchronously, thereby driving the rotating disk 34 to rotate through the meshing of the second gear 37 and the first gear 36. The self-locking of the worm wheel 38 and the worm 40 ensures that the rotating disk 34 will not drive the second gear 37 to rotate in the reverse direction, thereby ensuring that the four sets of sealing plates 26 will not be re-stored into the storage groove 23 due to minor vibrations when they are extended, so that the sealing plates 26 can maintain contact with the inner wall of the valve body 1. When working, when the drive When the connecting gear 41 rotates, since the connecting gear 41 is connected to the worm 40, it will drive the worm 40 to rotate synchronously, and the worm 40 will drive the worm wheel 38 meshing with it to rotate. The second gear 37 and the worm wheel 38 are both fixed on the fixed shaft 39, so the second gear 37 and the worm wheel 38 will rotate synchronously. The second gear 37 is meshed with the first gear 36, so when the second gear 37 rotates, it will drive the first gear 36 to rotate. The first gear 36 is fixed to the rotating disk 34, so the first gear 36 will rotate. During the rotation of the first gear 36, the sliding column 33 will slide along the guide groove 35, thereby allowing the connecting block 30 to slide inside the through groove 24.

[0026] Further, the pushing mechanism includes a movable plate 47, the movable plate 47 is slidably connected inside a movable groove 48, the movable groove 48 is provided at the front end of the butterfly plate 20, a mounting groove 49 is provided on the inner wall of the movable groove 48, a mounting ring 46 is slidably connected inside the mounting groove 49, the mounting ring 46 is fixedly connected to the movable plate 47, the rear end of the movable plate 47 is provided with four groups of circular grooves 44, the inner wall of the circular groove 44 is fixedly connected with a support spring 45, the rear end of the support spring 45 is fixedly connected to the inner wall of the movable groove 48, the rear end of the movable plate 47 is fixedly connected with a rack 43, the rack 43 is meshed with the connecting gear 41, the rack 43 passes through a rectangular hole 50, the rectangular hole 50 is provided on the inner wall of the movable groove 48, the rear end of the rack 43 is inserted into the sliding groove 53, and the sliding groove 53 is provided on the rotating disk 34; Through the structural design of the pushing mechanism, when the butterfly plate 20 is in the closed state, the pressure on the surface of the movable plate 47 by the fluid inside the valve body 1 is the greatest, so the movable plate 47 will be received in the movable groove 48, and the rack 43 fixed on the rear end of the movable plate 47 will move together, thereby driving the connecting gear 41 to rotate through the rack 43, so that the four sets of sealing plates 26 can extend from the inside of the receiving groove 23. When the butterfly plate 20 is opened, the pressure on the surface of the movable plate 47 will be reduced, and the movable plate 47 can be reset, so that the rack 43 drives the connecting gear 41 to rotate. The connecting gear 41 moves in the opposite direction, and the four sets of sealing plates 26 can also be stored in the storage groove 23, so as to control the extension of the sealing plate 26 by opening and closing the butterfly plate 20. When working, when the butterfly plate 20 is in the closed state, the butterfly plate 20 and the front end of the movable plate 47 will be subjected to greater pressure, and the pressure of the fluid will push the movable plate 47 to slide in the movable groove 48. The four sets of supporting springs 45 fixed at the rear end of the movable plate 47 will be compressed. During the sliding process of the movable plate 47 into the movable groove 48, the rear end of the movable plate 47 is fixed. The rack 43 will also move backward for a distance, and the rack 43 meshes with the connecting gear 41, so it can drive the connecting gear 41 to rotate, so that the sealing plate 26 extends from the inside of the receiving groove 23 and abuts against the inner wall of the valve body 1. Similarly, when the butterfly plate 20 is opened, as the butterfly plate 20 rotates inside the valve body 1, the contact area between the movable plate 47 and the fluid inside the valve body 1 will gradually decrease, and the pressure on the movable plate 47 will gradually decrease. The four sets of supporting springs 45 can push the movable plate 47 to reset, and the rack 43 will also move forward. The movement drives the connecting gear 41 to rotate in the reverse direction. At this time, the sealing plate 26 can be received in the receiving groove 23 and no longer abuts against the inner wall of the valve body 1. A rectangular hole 50 is provided on the inner wall of the movable groove 48 to facilitate the normal movement of the rack 43. A sliding groove 53 is also provided on the rotating disk 34 to ensure that the rotating disk 34 does not abut against the rack 43 during rotation. A mounting ring 46 is fixed on the movable plate 47. The sliding of the mounting ring 46 in the mounting groove 49 can prevent the movable plate 47 from slipping out of the movable groove 48.

[0027] Furthermore, a guide rod 42 is inserted into the rack 43, and a hole corresponding to the guide rod 42 is opened inside the rack 43, and the rear end of the guide rod 42 is fixedly connected to the inner wall of the fixed housing 22; During operation, the guide rod 42 is used to provide support for the rack 43 when the rack 43 moves to ensure the stability of the movement of the rack 43 and the correct engagement of the rack 43 with the connecting gear 41. A socket corresponding to the guide rod 42 is provided inside the rack 43, and the length of the socket must be greater than the length of the guide rod 42 inserted inside the rack 43.

[0028] Furthermore, a long groove 31 is formed on the sealing plate 26, and a rubber strip 25 is fixedly connected to the long groove 31; During operation, a long groove 31 is formed on the sealing plate 26. The size of the long groove 31 matches the rubber strip 25 and is used to fix the rubber strip 25. The deformation of the rubber strip 25 can improve the sealing effect between the sealing plate 26 and the inner wall of the valve body 1. Furthermore, the mounting ring 46 is penetrated by a plurality of sets of fixing columns 56, and both the front and rear sides of the fixing columns 56 are fixedly connected to the inner wall of the mounting groove 49; During operation, when the mounting ring 46 moves inside the mounting groove 49 , the mounting ring 46 will also slide on the fixing column 56 , and the movement of the mounting ring 46 is guided by the fixing column 56 to ensure that the mounting ring 46 can move stably inside the mounting groove 49 .

[0029] Furthermore, a cushion block 52 is fixedly connected to one side of the inner wall of the sliding groove 53, and the cushion block 52 is made of rubber material; During operation, the cushion block 52 is made of rubber material and is used to provide a buffer between the inner wall of the sliding groove 53 and the rack 43 to prevent the rack 43 from abutting against the inner wall of the sliding groove 53 .

[0030] Furthermore, two groups of sealing rings 55 are fixedly connected to the inner wall of the mounting groove 49, one group of the sealing rings 55 abuts against one side of the mounting ring 46, the cross section of the sealing ring 55 is trapezoidal in design, and the mounting ring 46 is provided with an inclined surface; When working, the cross-sections of the two sets of sealing rings 55 are both trapezoidal in design, and an inclined surface is provided on the mounting ring 46 to facilitate the mounting ring 46 to move to the maximum position inside the mounting groove 49, so that there can be a larger contact area between the mounting ring 46 and the sealing ring 55, thereby making the sealing effect of the sealing ring 55 better.

[0031] The wear-resistant structure of the enhanced metal hard-on-hard butterfly valve comprises a fixing ring 51 , which is fixedly connected to the front end of the butterfly plate 20 , and the cross section of the fixing ring 51 is designed to be trapezoidal.

[0032] During operation, the fixing ring 51 has a trapezoidal cross-section and is fixed at the front end of the butterfly plate 20. When the butterfly plate 20 is in an open state, the movable plate 47 can move inside the movable groove 48 under the push of the support spring 45. When the fluid flows inside the valve body 1, the fixing ring 51 can provide shielding for the part of the movable plate 47 extending out of the movable groove 48, thereby preventing the side of the movable plate 47 from being subjected to a large fluid pressure, thereby reducing the wear on the movable plate 47.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. An enhanced metal hard-on-hard butterfly valve, comprising a valve body (1), wherein a butterfly plate (20) is rotatably connected inside the valve body (1), and two sets of valve shafts (21) are fixedly connected to the rear end of the butterfly plate (20), characterized in that: The adjacent sides of the two groups of valve shafts (21) are fixedly connected to the fixed housing (22), and the fixed housing (22) is fixedly connected to the rear end of the butterfly plate (20). The side of the butterfly plate (20) is provided with a receiving groove (23), and the inside of the receiving groove (23) is slidably connected with four groups of sealing plates (26). The sealing plates (26) are provided with sealing mechanisms, and the sealing mechanisms are used to push the four groups of sealing plates (26) so that the sealing plates (26) and the inner wall of the valve body (1) can be abutted together, thereby improving the valve The butterfly plate (20) is provided with a connecting mechanism inside, the connecting mechanism is used to drive the rotating disk (34) to rotate and ensure that the rotating disk (34) does not rotate in the opposite direction when the sealing plate (26) abuts against the inner wall of the valve body (1), and the front end of the butterfly plate (20) is provided with a pushing mechanism, the pushing mechanism is used to drive the connecting gear (41) to rotate, so that the extension and storage of the sealing plate (26) can be synchronized with the closing and opening of the butterfly plate (20).

2. The enhanced metal hard-on-hard butterfly valve according to claim 1 is characterized in that: The sealing mechanism comprises a sealing plate (26), the sealing plate (26) being of arc-shaped design, the side of the sealing plate (26) away from the inner wall of the valve body (1) being fixedly connected to a moving block (32), the moving block (32) being slidably connected inside a through groove (24), the through groove (24) being arranged on the receiving groove (23), the through groove (24) being communicated with the inside of the butterfly plate (20), the two sides of the moving block (32) being fixedly connected with sliders (27), the sliders (27) being slidably connected inside a slide groove (28), the slide groove (28) being arranged on the inner wall of the through groove (24), the moving block (32) A connecting spring (29) is fixedly connected to the side away from the sealing plate (26), a connecting block (30) is fixedly connected to the side of the connecting spring (29) away from the moving block (32), the connecting block (30) is slidably connected inside the through groove (24), a sliding column (33) is fixedly connected to the side of the connecting block (30) away from the connecting spring (29), the sliding column (33) is slidably connected to a guide groove (35), and the guide groove (35) is provided on the rotating disk (34). The lengths of the four groups of sealing plates (26) are all greater than a quarter of a circular arc, and two adjacent groups of sealing plates (26) are in contact with each other.

3. The enhanced metal hard-on-hard butterfly valve according to claim 1 is characterized in that: The connecting mechanism comprises a first gear (36), the first gear (36) being fixedly connected to a rotating disk (34), the rotating disk (34) being rotatably connected to the inside of the butterfly plate (20), the first gear (36) being meshed with a second gear (37), the second gear (37) being fixedly connected to a fixed shaft (39), a worm gear (38) being fixedly connected to the fixed shaft (39), the worm gear (38) being located at the rear end of the second gear (37), the fixed shaft (39) being rotatably connected to the inner wall of the fixed housing (22), the worm gear (38) being meshed with a worm (40), the top and bottom ends of the worm (40) being rotatably connected to the inner wall of the fixed housing (22), and a connecting gear (41) being fixedly connected to a position near the bottom end of the worm (40).

4. The enhanced metal hard-on-hard butterfly valve according to claim 1 is characterized in that: The pushing mechanism comprises a movable plate (47), the movable plate (47) being slidably connected inside a movable groove (48), the movable groove (48) being provided at the front end of the butterfly plate (20), a mounting groove (49) being provided on the inner wall of the movable groove (48), a mounting ring (46) being slidably connected inside the mounting groove (49), the mounting ring (46) being fixedly connected to the movable plate (47), and four groups of circular grooves (44) being provided at the rear end of the movable plate (47), the inner wall of the circular groove (44) being fixedly connected to the movable plate (47). A support spring (45) is connected, the rear end of the support spring (45) is fixedly connected to the inner wall of the movable groove (48), the rear end of the movable plate (47) is fixedly connected to a rack (43), the rack (43) is meshed with the connecting gear (41), the rack (43) passes through a rectangular hole (50), the rectangular hole (50) is provided on the inner wall of the movable groove (48), the rear end of the rack (43) is inserted into the sliding groove (53), and the sliding groove (53) is provided on the rotating disk (34).

5. The enhanced metal hard-on-hard butterfly valve according to claim 4 is characterized in that: A guide rod (42) is inserted into the rack (43), a socket corresponding to the guide rod (42) is provided inside the rack (43), and a rear end of the guide rod (42) is fixedly connected to the inner wall of the fixed housing (22).

6. The enhanced metal hard-on-hard butterfly valve according to claim 2 is characterized in that: The sealing plate (26) is provided with a long groove (31), and a rubber strip (25) is fixedly connected to the long groove (31).

7. The enhanced metal hard-on-hard butterfly valve according to claim 4 is characterized in that: The mounting ring (46) is penetrated by a plurality of sets of fixing columns (56), and the front and rear sides of the fixing columns (56) are fixedly connected to the inner wall of the mounting groove (49).

8. The enhanced metal hard-on-hard butterfly valve according to claim 4 is characterized in that: A cushion block (52) is fixedly connected to one side of the inner wall of the sliding groove (53), and the cushion block (52) is made of rubber material.

9. The enhanced metal hard-on-hard butterfly valve according to claim 7 is characterized in that: Two groups of sealing rings (55) are fixedly connected to the inner wall of the installation groove (49), one group of the sealing rings (55) abuts against one side of the installation ring (46), the cross section of the sealing ring (55) is trapezoidal in design, and the installation ring (46) is provided with an inclined surface.

10. The wear-resistant structure of the enhanced metal hard-to-hard butterfly valve is characterized by: The wear-resistant structure comprises the enhanced metal hard-on-hard butterfly valve according to any one of claims 1 to 9, comprising a fixing ring (51), wherein the fixing ring (51) is fixedly connected to the front end of the butterfly plate (20), and the cross-section of the fixing ring (51) is designed to be trapezoidal.

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