Butterfly valve and butterfly valve docking device

Abstract

The present invention discloses a butterfly valve and a docking device for a butterfly valve, and the present invention relates to the technical field of butterfly valves. Due to the close connection between the valve plate and the valve seat, when the valve plate is in use, friction occurs between the valve plate and the valve seat when the valve plate rotates, resulting in wear between the contact surfaces, affecting the sealing effect when closed. The arc strip and the arc stop block cooperate to limit the rotation angle of the valve plate, thereby avoiding excessive rotation of the valve plate, and ensuring that both sides of the valve plate are closely fitted to the arc strip, so that the valve plate that rotates to close the circulation gap is compressed by the arc strip to deform the elastic gasket annularly, causing the elastic gasket ring to generate elastic force, thereby increasing the degree of fit and the fitting pressure between the valve plate and the valve plate, thereby avoiding wear between materials during the rotation of the valve plate, resulting in a wear gap between the valve plate and the valve seat, resulting in the circulation gap being unable to be completely closed when the butterfly valve is closed.

Description

Technical Field

[0001] The invention relates to the technical field of butterfly valves, in particular to a butterfly valve and a docking device for the butterfly valve. Background Art

[0002] At present, butterfly valve is a commonly used valve type, which has the characteristics of simple structure, small size, light weight, easy operation, etc. The valve plate of butterfly valve rotates in the valve body. When the valve plate is parallel to the pipeline axis, the valve is in a fully open state, and the fluid can pass through the valve without obstruction. When the valve plate rotates to be perpendicular to the pipeline axis, the valve is in a fully closed state, preventing the fluid from passing through. By controlling the rotation angle of the valve plate, the flow rate and pressure of the fluid can be adjusted;

[0003] During the use of the butterfly valve, due to the close connection between the valve plate and the valve seat, when the valve plate is in use, friction between the valve seat and the valve plate occurs during rotation, resulting in wear between the contact surfaces, which affects the sealing effect when the valve is closed. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a butterfly valve, comprising:

[0005] A valve body having a frame supporting the structural assembly; flanges are fixedly mounted on both sides of the valve body;

[0006] A valve seat mechanism, the valve seat mechanism having a flow path for the material, the valve seat mechanism being installed inside the valve body, and a valve plate being installed inside the valve seat mechanism;

[0007] A sealing mechanism, which is used for sealing between the valve seat mechanism and the valve body, and is installed on the top of the valve plate;

[0008] A valve stem mechanism, which is used to control the angle of the valve plate, wherein the bottom end of the valve stem mechanism is fixedly connected to the top of the sealing mechanism, and a rotating disk is fixedly installed on the top of the valve stem mechanism;

[0009] In which, the valve seat mechanism includes a hollow cover, which is fixedly mounted on the inner wall of the valve body, and the valve plate is rotatably mounted on the inner wall of the hollow cover. A circular groove is provided at the bottom of the inner wall of the hollow cover, and a rotating block is rotatably mounted at the circular groove of the hollow cover. The rotating block supports the bottom of the valve plate to limit the position of the valve plate in the hollow cover, and at the same time, provides support to the valve plate and limits the rotation center of the valve plate to avoid the valve plate from deviating from the axial position of the hollow cover when rotating, causing rotation obstruction and increasing rotation wear of the valve plate. The top of the rotating block is fixedly connected to the bottom of the valve plate, and arc grooves are symmetrically provided on both sides of the inner wall of the hollow cover. Elastic gaskets are fixedly mounted at the arc grooves of the hollow cover, and arc strips are fixedly mounted on the opposite surfaces of the elastic gaskets. The cooperation between the blocks limits the rotation angle of the valve plate through the arc stop block to avoid excessive rotation of the valve plate, and at the same time ensures that the two sides of the valve plate are closely fitted with the arc strip, so that the valve plate that rotates to close the circulation gap is compressed by the arc strip to deform the elastic gasket annularly, so that the elastic gasket ring generates elastic force, thereby increasing the degree of fit and the fitting pressure between the valve plate and the valve plate, avoiding wear between materials during the rotation of the valve plate, resulting in a wear gap between the valve plate and the valve seat, which makes the circulation gap unable to be completely closed when the butterfly valve is closed, the opposite surface of the arc strip is fitted with the outer side of the valve plate, and arc stops are fixedly installed on both sides of the inner wall of the hollow cover, the two arc stops are in contact with the outer side of the valve plate and are located on both sides of the valve plate, the outer side of the valve plate is adapted to the inner wall of the hollow cover, and an empty groove is provided on the top of the hollow cover.

[0010] Preferably, the sealing mechanism includes a connecting block, clamping blocks are fixedly installed on both sides of the bottom of the connecting block, the connecting block is fixedly connected to the tops of both sides of the valve plate through the clamping blocks, and a gasket is fixedly installed on the top of the connecting block, the top of the gasket is adapted to the top of the inner wall of the hollow cover, a column block is fixedly installed on the top of the connecting block, the top of the column block is fixedly connected to the bottom end of the valve stem mechanism, and an inner oblique ring is fixedly installed on the top of the outer side of the column block, the outer side of the inner oblique ring is inclined inward from top to bottom, and the outer side of the column block A hollow ring is slidably installed, and the inclined surfaces between the inner bevel ring and the outer bevel ring are adapted. When the internal pressure of the butterfly valve increases and the fluid overflows, the fluid contacts the bottom of the hollow ring, and pushes the hollow ring upward under pressure, so that the hollow ring drives the outer bevel ring to move upward, thereby increasing the contact pressure between the outer bevel ring and the inner bevel ring, improving the sealing pressure at the gap position, and preventing the overflowed fluid from spraying out. The outer bevel ring is fixedly installed on the top of the hollow ring, and the inner wall of the outer bevel ring is adapted to the inclined surface of the inner bevel ring, and the outer side of the outer bevel ring is slidably adapted to the inner wall of the valve body.

[0011] Preferably, the valve stem mechanism includes a fixed disk and a screw, the bottom end of the screw is fixedly connected to the top end of the column block, and the top of the screw is fixedly connected to the bottom of the rotating disk, the outer side of the screw is threadedly connected to a threaded disk, side plates are provided on both sides of the threaded disk, and the inner walls of the side plates are slidably installed with a limit rod, the bottom of the limit rod is fixedly connected to the top of the fixed disk, the top of the limit rod is fixedly installed with a limit disk, and the bottom of the threaded disk is fixedly installed with a spring, and through the deformation elastic force of the spring, when the butterfly valve is closed, the threaded disk compresses the spring to deform, so that the spring presses downward on the groove cover, increasing the size of the inner gasket ring and the outer The contact pressure between the gaskets seals the gap between the valve stem and the valve body to prevent the internal fluid pressure from causing the fluid to overflow and spray out at the gap when the valve body is closed. The bottom end of the spring is fixedly connected to a groove cover, the inner wall of the groove cover is slidably fitted with the outer side of the screw, and an inner gasket is fixedly installed on the bottom of the groove cover. The bottom of the fixed disk is fixedly connected to the top of the valve body, and an outer gasket is fixedly installed on the inner wall of the fixed disk. The outer gasket is made of rubber material, the inner gasket is made of rubber material, and the outer side of the inner gasket is an inclined surface inclined inward from top to bottom, and the outer side of the groove cover is slidably fitted with the inner wall of the fixed disk.

[0012] The docking device of the butterfly valve includes:

[0013] A connecting mechanism, which is used to connect the pipeline with the butterfly valve, and the connecting mechanism is connected to the butterfly valve flange through a flange;

[0014] The regulating mechanism is used for assisting sealing when the material flow in the pipeline fluctuates, and the regulating mechanism is fixedly installed inside the connecting mechanism.

[0015] Preferably, the connecting mechanism includes a docking sleeve, both ends of the docking sleeve are fixedly installed with bolts, the two ends of the docking sleeve are respectively connected to the pipeline and the butterfly valve flange by bolts, and both ends of the inner wall of the docking sleeve are provided with annular grooves, and sealing gaskets are fixedly installed at the annular grooves of the docking sleeve, and the inner wall of the sealing gasket is evenly provided with clamping grooves, the adjusting mechanism includes an arc clamping block, the outer side of the arc clamping block is clamped with the clamping groove of the sealing gasket, and the inner wall of the arc clamping block is rotatably installed with a rotating rod, and the end of the rotating rod away from the arc clamping block is rotatably installed with a fixing ring, and the inner wall of the fixing ring is fixedly installed with an inclined column, and the inclined surface of the inclined column is impacted during the fluctuation of fluid, so that the inclined column drives the fixing ring to move, and in the impact direction, drives the arc clamping block to expand outward, so that the arc clamping block drives the sealing gasket to apply pressure to the connection position, utilizes the flow fluctuation of the fluid to increase the sealing performance, and avoids fluid overflow during the fluctuation of the fluid, and the two ends of the inclined column are inwardly concave arc surfaces.

[0016] The present invention provides a butterfly valve having the following beneficial effects:

[0017] 1. The butterfly valve, through the cooperation between the arc strip and the arc stopper, limits the rotation angle of the valve plate through the arc stopper to avoid excessive rotation of the valve plate, while ensuring that the two sides of the valve plate are closely fitted with the arc strip, so that the valve plate that rotates to close the flow gap is compressed by the arc strip to deform the elastic gasket ring, so that the elastic gasket ring generates elastic force, increases the degree of fit and the fitting pressure between the valve plate, and avoids wear between materials during the rotation of the valve plate, resulting in a wear gap between the valve plate and the valve seat, which causes the flow gap to fail to be completely closed when the butterfly valve is closed.

[0018] Second, the butterfly valve supports the bottom of the valve plate through the rotating block to limit the position of the valve plate in the hollow cover. While providing support to the valve plate, it limits the rotation center of the valve plate to avoid the valve plate from being offset from the axial position of the hollow cover when rotating, causing rotation obstruction and increasing rotation wear of the valve plate.

[0019] 3. The butterfly valve is adapted through the inclined surface between the inner bevel ring and the outer bevel ring. When the internal pressure of the butterfly valve increases and the fluid overflows, the fluid contacts the bottom of the hollow ring and pushes the hollow ring upward under pressure, so that the hollow ring drives the outer bevel ring to move upward, thereby increasing the contact pressure between the outer bevel ring and the inner bevel ring, improving the sealing pressure at the gap position, and preventing the overflowed fluid from spraying out.

[0020] Fourth, the butterfly valve uses the deformation elastic force of the spring. When the butterfly valve is closed, the threaded disk compresses the spring to deform, causing the spring to press downward on the groove cover, increasing the contact pressure between the inner gasket ring and the outer gasket ring, and sealing the gap between the valve stem and the valve body to prevent the internal fluid pressure from causing the fluid to overflow and spray out at the gap when the valve body is closed.

[0021] 5. The docking device of the butterfly valve, through the inclined surface of the inclined column, impacts the inclined column during the fluid fluctuation, so that the inclined column drives the fixed ring to move, and drives the arc clamp block to expand outward in the impact direction, so that the arc clamp block drives the sealing gasket ring to apply pressure to the connection position, and utilizes the flow fluctuation of the fluid to increase the sealing performance and avoid fluid overflow during the fluid fluctuation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the external structure of the docking device between butterfly valves of the present invention;

[0023] Figure 2 This is a schematic diagram of the butterfly valve structure of the present invention;

[0024] Figure 3 This is a structural anatomical diagram of a butterfly valve of the present invention;

[0025] Figure 4 It is a schematic diagram of the valve seat mechanism structure of the present invention;

[0026] Figure 5 This is a structural anatomical diagram of the valve seat mechanism of the present invention;

[0027] Figure 6 For the present invention Figure 5 A magnified schematic diagram of structure A;

[0028] Figure 7 It is a schematic diagram of the sealing mechanism structure of the present invention;

[0029] Figure 8 It is a partial structural schematic diagram of the sealing mechanism of the present invention;

[0030] Fig. 9 This is a schematic diagram of the valve stem mechanism structure of the present invention;

[0031] Fig.10 This is a structural anatomical diagram of the valve stem mechanism of the present invention;

[0032] Fig.11 It is a structural schematic diagram of the docking device of the butterfly valve of the present invention;

[0033] Fig.12 It is a structural dissection diagram of the docking device of the butterfly valve of the present invention.

[0034] In the figure: 1. valve body; 2. valve seat mechanism; 3. valve plate; 4. flange; 5. turntable; 6. valve stem mechanism; 7. sealing mechanism; 8. connecting mechanism; 9. adjusting mechanism; 21. hollow cover; 22. arc stopper; 23. turntable; 24. elastic gasket; 25. arc strip; 61. fixed plate; 62. limit rod; 63. groove cover; 64. spring; 65. screw; 66. limit plate; 67. threaded plate; 68. outer gasket; 69. inner gasket; 71. connecting block; 72. gasket; 73. clamping block; 74. column block; 75. inner oblique ring; 76. outer oblique ring; 77. hollow ring; 81. docking tube; 82. bolt; 83. sealing gasket; 91. inclined column; 92. fixed ring; 93. turntable; 94. arc clamping block. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0036] The first embodiment, as Figures 1 to 6 As shown, the present invention provides a technical solution: a butterfly valve, comprising:

[0037] A valve body 1 having a frame supporting a structural component; flanges 4 are fixedly mounted on both sides of the valve body 1;

[0038] A valve seat mechanism 2, wherein the valve seat mechanism 2 has a flow path for the material, the valve seat mechanism 2 is installed inside the valve body 1, and a valve plate 3 is installed inside the valve seat mechanism 2;

[0039] A sealing mechanism 7, which is used for sealing between the valve seat mechanism 2 and the valve body 1, and is installed on the top of the valve plate 3;

[0040] A valve stem mechanism 6, which is used to control the angle of the valve plate 3, the bottom end of the valve stem mechanism 6 is fixedly connected to the top of the sealing mechanism 7, and a rotating disk 5 is fixedly installed on the top of the valve stem mechanism 6;

[0041] The valve seat mechanism 2 comprises a hollow cover 21, which is fixedly mounted on the inner wall of the valve body 1, and the valve plate 3 is rotatably mounted on the inner wall of the hollow cover 21. A circular groove is provided at the bottom of the inner wall of the hollow cover 21, and a rotating block 23 is rotatably mounted at the circular groove of the hollow cover 21. The top of the rotating block 23 is fixedly connected to the bottom of the valve plate 3, and arc grooves are symmetrically provided on both sides of the inner wall of the hollow cover 21. In the valve seat mechanism 2, the valve plate 3 is adapted to the inner wall of the hollow cover 21. During the rotation of the valve plate 3, the flow path of the fluid in the pipelines on both sides is controlled by the gap opened between the valve plate 3 and the hollow cover 21. At the same time, during the rotation of the valve plate 3, the rotating block 23 is fixedly connected to the bottom of the valve plate 3 to provide support for the valve plate 3, so that the rotating block 23 and the gasket 72 cooperate with each other, thereby increasing the contact pressure between the gasket 72 and the through groove position of the hollow cover 21 and improving the sealing effect. Elastic gaskets 2 are fixedly mounted at the arc grooves of the hollow cover 21. 4. The opposite surfaces of the elastic gasket 24 are fixedly installed with arc strips 25, and the opposite surfaces of the arc strips 25 are in contact with the outer side of the valve plate 3. The two sides of the inner wall of the hollow cover 21 are fixedly installed with arc blocks 22. When the butterfly valve is closed to close the flow gap between the valve plate 3 and the hollow cover 21, the arc block 22 is used to limit the rotation position of the valve plate 3 when closing, so as to avoid excessive rotation of the valve plate 3. At the same time, in the process of the valve plate 3 rotating to close the flow gap, the rotating valve plate 3 contacts the arc strips 25 during rotation, so that the arc strips 25 apply pressure to the outside during the rotation of the valve plate 3 to compress the elastic gasket 24. After the valve plate 3 closes the gap, the deformed elastic gasket 24 drives the contact pressure between the arc strips 25 and the outer side of the valve plate 3. The two arc blocks 22 are in contact with the outer side of the valve plate 3 and are located on both sides of the valve plate 3. The outer side of the valve plate 3 is adapted to the inner wall of the hollow cover 21, and an empty groove is provided on the top of the hollow cover 21.

[0042] The second embodiment is based on the first embodiment. Figures 7 to 10As shown, the sealing mechanism 7 includes a connecting block 71, and clamping blocks 73 are fixedly installed on both sides of the bottom of the connecting block 71. The connecting block 71 is fixedly connected to the tops of both sides of the valve plate 3 through the clamping blocks 73, and a gasket 72 is fixedly installed on the top of the connecting block 71. The top of the gasket 72 is adapted to the top of the inner wall of the hollow cover 21. When the sealing degree between the valve seat mechanism 2 and the valve body 1 is controlled by the sealing mechanism 7, it is connected to the screw 65 through the column block 74. At the same time, at the bottom of the column block 74, it is fixedly connected to the valve plate 3 through the connecting block 71 and the clamping block 73, so that during the rotation of the screw 65, the valve plate 3 is driven to rotate. Through the restriction of the valve seat mechanism 2 on the valve plate 3, the gasket 72 is closely attached to the gap position between the connecting block 71 and the valve seat mechanism 2. A column block 74 is fixedly installed on the top of the connecting block 71. The top of the column block 74 is fixedly connected to the bottom end of the valve stem mechanism 6, and the outer An inner bevel ring 75 is fixedly installed on the top of the side, and the outer side of the inner bevel ring 75 is inclined inwardly from top to bottom. A hollow ring 77 is slidably installed on the outer side of the column block 74, and an outer bevel ring 76 is fixedly installed on the top of the hollow ring 77. When flowing through the gap between the valve seat mechanism 2 and the valve plate 3, due to the excessive fluid pressure in the butterfly valve, the fluid overflows from the gap between the gasket ring 72, and the fluid enters the bottom of the hollow ring 77, and the hollow ring 77 is pushed upward by pressure, so that the hollow ring 77 drives the outer bevel ring 76 to squeeze the inner bevel ring 75 upward, and the outer bevel ring 76 and the inner bevel ring 75 are closely fitted through the inclined surface between the outer bevel ring 76 and the inner bevel ring 75. Under the action of pressure, the contact pressure between the outer bevel ring 76 and the inner bevel ring 75 is increased to limit the overflow of the fluid, and the inner wall of the outer bevel ring 76 is adapted to the inclined surface of the inner bevel ring 75, and the outer side of the outer bevel ring 76 is slidably adapted to the inner wall of the valve body 1.

[0043] The valve stem mechanism 6 includes a fixed plate 61 and a screw 65. The bottom end of the screw 65 is fixedly connected to the top end of the column block 74, and the top of the screw 65 is fixedly connected to the bottom of the rotating plate 5. The outer side of the screw 65 is threadedly connected with a threaded plate 67. Side plates are provided on both sides of the threaded plate 67, and the inner walls of the side plates are slidably installed with a limit rod 62. The bottom of the limit rod 62 is fixedly connected to the top of the fixed plate 61. When the worker rotates the rotating plate 5, the rotating plate 5 drives the screw 65 to rotate, and the sealing mechanism 7 and the valve plate 3 are driven to rotate by the rotation of the screw 65. The gap between the valve plate 3 and the valve seat mechanism 2 is controlled by the open gap, and the flow of the material in the pipeline is controlled by the threaded connection between the threaded disk 67 and the screw 65. During the rotation of the screw 65, the threaded disk 67 is restricted by the limit rod 62, so that the threaded disk 67 slides up and down. When the butterfly valve is closed, the screw 65 rotates forward to make the threaded disk 67 slide downward. The limit disk 66 is fixedly installed on the top of the limit rod 62, and a spring is fixedly installed on the bottom of the threaded disk 67. 64, the bottom end of the spring 64 is fixedly connected with a groove cover 63, the inner wall of the groove cover 63 is slidably adapted to the outer side of the screw 65, and the bottom of the groove cover 63 is fixedly installed with an inner gasket 69, the bottom of the fixed disk 61 is fixedly connected to the top of the valve body 1, and the inner wall of the fixed disk 61 is fixedly installed with an outer gasket 68, the outer gasket 68 is made of rubber material, and the inner gasket 69 is made of rubber material. In the process of the threaded disk 67 moving downward, the spring 64 is compressed, so that the spring 64 is deformed under compression, generating a rebound force, and driving the inner gasket 69 downward through the groove cover 63 Pressure is applied, and the contact pressure between the outer gasket 68 and the inner wall of the valve body 1 is increased through the adaptation of the inclined surface of the inner gasket 69 and the inner wall of the outer gasket 68 during the downward pressure application process. When controlling the butterfly valve to open the flow path, the screw 65 rotates in the opposite direction to move the threaded disk 67 upward, reducing the deformation degree of the spring 64. At the same time, during the upward movement of the threaded disk, the upward movement distance of the threaded disk 67 is limited by the limit disk 66, and the outer side of the inner gasket 69 is an inclined surface inclined inward from top to bottom, and the outer side of the groove cover 63 is slidably adapted to the inner wall of the fixed disk 61.

[0044] The third embodiment is based on the first and second embodiments. Figure 11 to Figure 12 As shown:

[0045] The docking device of the butterfly valve includes:

[0046] A connecting mechanism 8, which is used to connect the pipeline with the butterfly valve, and the connecting mechanism 8 is connected to the butterfly valve flange through the flange 4;

[0047] The adjusting mechanism 9 is used for assisting sealing when the material flow in the pipeline fluctuates, and the adjusting mechanism 9 is fixedly installed inside the connecting mechanism 8 .

[0048] The connecting mechanism 8 includes a docking sleeve 81, both ends of which are fixedly installed with bolts 82. The two ends of the docking sleeve 81 are respectively connected to the pipeline and the butterfly valve flange through the bolts 82, and both ends of the inner wall of the docking sleeve 81 are provided with annular grooves. The two ends of the docking sleeve 81 are respectively flange-connected with the pipeline and the flange 4 of the butterfly valve, so that the pipeline and the butterfly valve are connected. The fluid in the pipeline can flow into the butterfly valve through the docking sleeve 81, and sealing gaskets 83 are fixedly installed at the annular grooves of the docking sleeve 81, and the inner wall of the sealing gasket 83 is evenly provided with grooves.

[0049] The adjusting mechanism 9 comprises an arc clamping block 94, the outer side of which is clamped with the clamping groove of the sealing gasket ring 83, and a rotating rod 93 is rotatably installed on the inner wall of the arc clamping block 94, and a fixing ring 92 is rotatably installed on the end of the rotating rod 93 away from the arc clamping block 94, and a bevel column 91 is fixedly installed on the inner wall of the fixing ring 92. When the flow pressure of the fluid in the pipeline changes, or when the butterfly valve is switched on and off, causing the flow of the fluid to fluctuate, the fluctuating fluid impacts the inclined surface of the bevel column 91, so that the bevel column 91 drives the fixing ring 92 to move under the impact. In the process of the movement of the fixing ring 92, the arc clamping block 94 in the impact direction is driven to expand outward by the rotating rod 93, so that the contact pressure between the sealing gasket ring 83 and the connection gap is increased, and the two ends of the bevel column 91 are inwardly concave arc surfaces.

[0050] When in use, the butterfly valve is connected to the pipeline through the docking device. The worker rotates the turntable 5 to control the rotation of the valve stem mechanism 6, so that the valve stem mechanism 6 drives the valve plate 3 to rotate inside the valve seat mechanism 2 through the sealing mechanism 7. During the rotation of the valve plate 3, the angle changes to control the opening and closing of the flow path of the fluid. At the same time, in the docking device of the butterfly valve, the pipeline is connected to the butterfly valve through the connecting mechanism 8, and the adjusting mechanism 9 cooperates with the connecting mechanism 8 to ensure the sealing.

[0051] When controlling the opening and closing of the butterfly valve, the worker rotates the turntable 5 to drive the screw 65 to rotate, and the rotation of the screw 65 drives the sealing mechanism 7 and the valve plate 3 to rotate, thereby controlling the gap between the valve plate 3 and the valve seat mechanism 2, and controlling the flow of the material in the pipeline by controlling the opened gap. At the same time, during the rotation of the screw 65, the threaded disk 67 is connected to the screw 65 through the threaded connection. During the rotation of the screw 65, the threaded disk 67 is restricted by the limit rod 62 to make the threaded disk 67 slide up and down. When closing the butterfly valve, the screw 65 rotates forward to make the threaded disk 6 7 slides downward, and in the process of the threaded disk 67 moving downward, the spring 64 is compressed, so that the spring 64 is deformed under compression, generating a rebound force, driving the inner gasket ring 69 to apply pressure downward through the groove cover 63, and through the adaptation of the inclined surface of the inner gasket ring 69 and the inner wall of the outer gasket ring 68, in the process of applying pressure downward, the contact pressure between the outer gasket ring 68 and the inner wall of the valve body 1 is increased. When controlling the butterfly valve to open the flow path, the screw 65 rotates in the opposite direction to move the threaded disk 67 upward, reducing the deformation degree of the spring 64. At the same time, in the process of the threaded disk moving upward, the upward movement distance of the threaded disk 67 is limited by the limit disk 66.

[0052] When the sealing degree between the valve seat mechanism 2 and the valve body 1 is controlled by the sealing mechanism 7, the column block 74 is connected to the screw rod 65, and at the same time, at the bottom of the column block 74, the connection block 71 and the clamping block 73 are fixedly connected to the valve plate 3, so that the valve plate 3 is driven to rotate during the rotation of the screw rod 65, and the valve seat mechanism 2 restricts the valve plate 3, so that the gasket 72 is closely attached to the gap position between the connection block 71 and the valve seat mechanism 2. At the same time, when the fluid flows through the gap between the valve seat mechanism 2 and the valve plate 3, the fluid overflows from the gap between the gasket 72 due to the excessive fluid pressure in the butterfly valve, and the fluid enters the bottom of the hollow ring 77, and the hollow ring 77 is pushed upward by the pressure, so that the hollow ring 77 drives the outer oblique ring 76 to squeeze the inner oblique ring 75 upward, and the outer oblique ring 76 and the inner oblique ring 75 are closely attached through the inclined surface between the outer oblique ring 76 and the inner oblique ring 75. Under the action of pressure, the contact pressure between the outer oblique ring 76 and the inner oblique ring 75 is increased to limit the overflow of the fluid.

[0053] In the valve seat mechanism 2, the valve plate 3 is adapted to the inner wall of the hollow cover 21. During the rotation of the valve plate 3, the flow path of the fluid in the pipelines on both sides is controlled by the gap opened between the valve plate 3 and the hollow cover 21. At the same time, during the rotation of the valve plate 3, the valve plate 3 is supported by the fixed connection between the rotating block 23 and the bottom of the valve plate 3, so that the rotating block 23 and the gasket 72 cooperate with each other, increase the contact pressure between the gasket 72 and the through groove position of the hollow cover 21, and improve the sealing effect. At the same time, when the butterfly valve is closed to close the flow gap between the valve plate 3 and the hollow cover 21, the arc stopper 22 is used to limit the rotation position of the valve plate 3 during closing to avoid excessive rotation of the valve plate 3. At the same time, during the process of the valve plate 3 rotating to close the flow gap, the rotating valve plate 3 contacts the arc strip 25 during rotation, so that the arc strip 25 applies pressure to the outside during the rotation of the valve plate 3 and compresses the elastic gasket 24. After the valve plate 3 closes the gap, the deformed elastic gasket 24 drives the contact pressure between the arc strip 25 and the outside of the valve plate 3.

[0054] In the connecting mechanism 8, the two ends of the docking tube 81 are flange-connected with the flange 4 of the pipeline and the butterfly valve respectively, so that the pipeline and the butterfly valve are connected, and the fluid in the pipeline can flow into the butterfly valve through the docking tube 81. At the same time, when the flow pressure of the fluid in the pipeline changes, or when the butterfly valve is switched on and off, causing the flow of the fluid to fluctuate, the fluctuating fluid impacts the inclined surface of the inclined column 91, so that the inclined column 91 drives the fixed ring 92 to move under the impact. During the movement of the fixed ring 92, the arc block 94 in the impact direction is driven to expand outward through the rotating rod 93, so that the contact pressure between the sealing gasket ring 83 and the connection gap is increased.

[0055] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. Butterfly valve, characterized in that: include: A valve body (1), the valve body (1) having a frame supporting a structural component; flanges (4) are fixedly mounted on both sides of the valve body (1); A valve seat mechanism (2), the valve seat mechanism (2) having a flow path for a material, the valve seat mechanism (2) being installed inside the valve body (1), and a valve plate (3) being installed inside the valve seat mechanism (2); A sealing mechanism (7), the sealing mechanism (7) being used for sealing between the valve seat mechanism (2) and the valve body (1), the sealing mechanism (7) being mounted on the top of the valve plate (3); A valve stem mechanism (6), the valve stem mechanism (6) being used to control the angle of the valve plate (3), the bottom end of the valve stem mechanism (6) being fixedly connected to the top of the sealing mechanism (7), and a rotating disk (5) being fixedly mounted on the top of the valve stem mechanism (6); The valve seat mechanism (2) comprises a hollow cover (21), wherein the hollow cover (21) is fixedly mounted on the inner wall of the valve body (1), and the valve plate (3) is rotatably mounted on the inner wall of the hollow cover (21). A circular groove is provided at the bottom of the inner wall of the hollow cover (21), and a rotating block (23) is rotatably mounted at the circular groove of the hollow cover (21). The top of the rotating block (23) is fixedly connected to the bottom of the valve plate (3). Arc grooves are symmetrically provided on both sides of the inner wall of the hollow cover (21), and elastic gaskets (24) are fixedly mounted at the arc grooves of the hollow cover (21), and arc strips (25) are fixedly mounted on the opposite surfaces of the elastic gaskets (24), and the opposite surfaces of the arc strips (25) are in contact with the outer side of the valve plate (3); Arc stoppers (22) are fixedly mounted on both sides of the inner wall of the hollow cover (21), the two arc stoppers (22) are in contact with the outer side of the valve plate (3) and are located on both sides of the valve plate (3), the outer side of the valve plate (3) is matched with the inner wall of the hollow cover (21), and a hollow groove is provided on the top of the hollow cover (21); The sealing mechanism (7) comprises a connecting block (71), clamping blocks (73) are fixedly mounted on both sides of the bottom of the connecting block (71), the connecting block (71) is fixedly connected to the tops of both sides of the valve plate (3) via the clamping blocks (73), a gasket (72) is fixedly mounted on the top of the connecting block (71), the top of the gasket (72) is matched with the top of the inner wall of the hollow cover (21), and a column block (74) is fixedly mounted on the top of the connecting block (71); The top end of the column block (74) is fixedly connected to the bottom end of the valve stem mechanism (6), and an inner bevel ring (75) is fixedly installed on the top of the outer side of the column block (74), the outer side of the inner bevel ring (75) is inclined inward from top to bottom, and a hollow ring (77) is slidably installed on the outer side of the column block (74), and an outer bevel ring (76) is fixedly installed on the top of the hollow ring (77), the inner wall of the outer bevel ring (76) is matched with the inclined surface of the inner bevel ring (75), and the outer side of the outer bevel ring (76) is slidably matched with the inner wall of the valve body (1); The valve stem mechanism (6) comprises a fixed disk (61) and a screw rod (65), the bottom end of the screw rod (65) is fixedly connected to the top end of the column block (74), and the top of the screw rod (65) is fixedly connected to the bottom of the rotating disk (5), the outer side of the screw rod (65) is threadedly connected to a threaded disk (67), side plates are provided on both sides of the threaded disk (67), and the inner walls of the side plates are slidably mounted with limit rods (62); The bottom of the limiting rod (62) is fixedly connected to the top of the fixed disk (61); the top of the limiting rod (62) is fixedly mounted with a limiting disk (66); the bottom of the threaded disk (67) is fixedly mounted with a spring (64); the bottom end of the spring (64) is fixedly connected with a groove cover (63); the inner wall of the groove cover (63) is slidably matched with the outer side of the screw rod (65); and the bottom of the groove cover (63) is fixedly mounted with an inner gasket ring (69); The bottom of the fixed disk (61) is fixedly connected to the top of the valve body (1), and an outer gasket (68) is fixedly installed on the inner wall of the fixed disk (61), the outer gasket (68) is made of rubber material, the inner gasket (69) is made of rubber material, and the outer side of the inner gasket (69) is an inclined surface inclined inward from top to bottom, and the outer side of the groove cover (63) is slidably matched with the inner wall of the fixed disk (61); The docking device of a butterfly valve is characterized by comprising: A connecting mechanism (8), the connecting mechanism (8) is used to connect the pipeline with the butterfly valve, and the connecting mechanism (8) is connected to the butterfly valve flange via a flange plate (4); An adjusting mechanism (9) is used to assist sealing when material flow in the pipeline fluctuates, and the adjusting mechanism (9) is fixedly installed inside the connecting mechanism (8).

2. The butterfly valve docking device according to claim 1, characterized in that: The connecting mechanism (8) comprises a docking tube (81), both ends of which are fixedly mounted with bolts (82), the two ends of which are respectively connected to the pipeline and the butterfly valve flange via the bolts (82), and both ends of the inner wall of the docking tube (81) are provided with annular grooves, and sealing gaskets (83) are fixedly mounted at the annular grooves of the docking tube (81), and the inner wall of the sealing gasket (83) is evenly provided with clamping grooves.

3. The butterfly valve docking device according to claim 2, characterized in that: The adjusting mechanism (9) comprises an arc clamping block (94), the outer side of the arc clamping block (94) being clamped with a clamping groove of the sealing gasket ring (83), and a rotating rod (93) being rotatably mounted on the inner wall of the arc clamping block (94), a fixing ring (92) being rotatably mounted on one end of the rotating rod (93) away from the arc clamping block (94), and an inclined column (91) being fixedly mounted on the inner wall of the fixing ring (92), and both ends of the inclined column (91) being inwardly concave arc surfaces.

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