A high temperature wear-resistant butterfly valve

Abstract

The present invention relates to the technical field of butterfly valves, and in particular to a high-temperature wear-resistant butterfly valve. It comprises a valve seat, the middle part of the valve seat is sealed and rotatably connected with a rotating ball, the middle part of the rotating ball is provided with a channel, the inner wall of the channel of the rotating ball is fixedly connected with a seal made of wear-resistant material, one side of the rotating ball is rotatably connected with a first connecting shaft and the other side is rotatably connected with a second connecting shaft, the first connecting shaft passes through the first connecting member and the two are rotatably connected, a butterfly plate that seals with the seal is commonly fixedly connected between the second connecting shaft and the opposite ends of the first connecting shaft, the first connecting shaft passes through and is fixedly connected with a support frame and a limit plate, and a driving mechanism is provided between the valve seat and the second connecting member. The present invention reduces the impact force of high-pressure liquid on the butterfly plate by adjusting the rotation angle of the rotating ball, thereby preventing the liquid pressure from suddenly increasing and impacting the butterfly plate, causing the butterfly plate to deform and reduce the sealing performance.

Description

Technical Field

[0001] The invention relates to the technical field of butterfly valves, and in particular to a high-temperature wear-resistant butterfly valve. Background Art

[0002] The butterfly valve is one of the simpler structures among all common valves. The butterfly valve is also called a reversing valve. It controls the on-off and flow rate of the liquid by changing the rotation angle of the butterfly plate. The butterfly valve structure can seal in both directions, and when the butterfly valve is fully open, the thickness of the butterfly plate is relatively small, so it will not affect the flow of the liquid. Therefore, butterfly valves are often used in fields such as petroleum and chemical industry.

[0003] The existing butterfly valve is composed of a valve body, a valve stem and a butterfly plate. Although butterfly valves are often used in transportation environments with lower pressure, the pressure of the liquid in the pipeline cannot be guaranteed to be in a low-pressure state at all times. When the butterfly valve is in a fully closed state, the pressure of the liquid in the pipeline suddenly increases due to various reasons, which will cause the liquid in the pipeline to impact the butterfly plate in one direction. The butterfly plate and the valve stem are subjected to unidirectional force and are prone to deformation. The deformation of the butterfly plate can easily cause the seal between the butterfly plate and the valve body to fail, resulting in uncontrolled liquid in the pipeline. In severe cases, it may cause major production or construction accidents. Summary of the invention

[0004] In order to overcome the problem mentioned in the above background technology that the liquid in the pipeline unidirectionally impacts the butterfly plate, the butterfly plate and the valve stem are easily deformed due to unidirectional force, and the deformation of the butterfly plate causes the failure of the seal between the butterfly plate and the valve body, a high-temperature wear-resistant butterfly valve is provided.

[0005] The technical solution is: a high-temperature wear-resistant butterfly valve, including a valve seat, the middle part of the valve seat is sealed and rotatably connected to a rotating ball, one side of the valve seat is rotatably connected to a first connecting piece and the other side is rotatably connected to a second connecting piece, the opposite ends of the first connecting piece and the second connecting piece are fixedly connected to the rotating ball and seal-matched with the valve seat, a channel is provided in the middle of the rotating ball, the inner wall of the channel of the rotating ball is fixedly connected to a sealing piece set to a wear-resistant material, one side of the rotating ball is rotatably connected to a first connecting shaft and the other side is rotatably connected to a second connecting shaft, the first connecting shaft passes through the first connecting piece and the two are rotatably connected, and the second connecting A butterfly plate that seals with the sealing member is commonly fixed between the shaft and the opposite ends of the first connecting shaft, the first connecting shaft passes through and is fixedly connected to a support frame and a limit plate, a handle is fixedly connected to the outer end of the first connecting shaft, and the handle is rotatably connected to a rotating plate that limits the limit plate through a rotating shaft, a first elastic member is fixedly connected between the first connecting member and the valve seat, a fixed plate is fixedly connected to the end of the second connecting member away from the butterfly plate, a second elastic member is fixedly connected between the fixed plate and the valve seat, a driving mechanism is arranged between the valve seat and the second connecting member, and a limiting mechanism is arranged between the handle and the first connecting member.

[0006] Furthermore, the diameter of the water outlet of the valve seat is the same as the diameter of the middle channel of the rotating ball, and both the valve seat and the rotating ball are made of heat-resistant alloy steel.

[0007] Furthermore, a thickened portion is provided on the outer side of the seal, the first connecting shaft and the second connecting shaft both pass through the seal, and the seal is perfluoroether rubber for maintaining sealing and wear resistance under high temperature conditions.

[0008] Further, the driving mechanism includes a supporting shell, the supporting shell is fixedly connected to the water inlet of the valve seat, a flange is fixedly connected to the side of the supporting shell away from the valve seat, an elastic diaphragm is fixedly connected to the supporting shell, the elastic diaphragm and the supporting shell are sealed and cooperated to form a closed cavity, the closed cavity of the supporting shell and the elastic diaphragm is filled with hydraulic oil, the valve seat is fixedly connected to a first telescopic rod through a mounting seat, the first telescopic rod is connected to the closed cavity through an oil guide pipe, the valve seat is slidably connected to a rack through the mounting seat, the second connecting member is fixedly connected to a gear, the gear is meshed with the rack, and the telescopic end of the first telescopic rod is in extrusion contact with the rack.

[0009] Furthermore, the diameter of the elastic diaphragm is the same as the diameter of the water inlet of the valve seat, and the material of the elastic diaphragm is the same as the material of the sealing element.

[0010] Furthermore, the limiting mechanism includes an arc-shaped telescopic rod, which is fixedly connected to one side of the handle, and the rotating shaft of the rotating plate is fixedly connected to the telescopic end of the arc-shaped telescopic rod through a mounting plate, and the center of the arc-shaped telescopic rod is located on the central axis of the rotating shaft of the rotating plate, and the support frame is fixedly connected to a second telescopic rod through a mounting plate, and the second telescopic rod is filled with hydraulic oil, and the arc-shaped telescopic rod and the second telescopic rod are fixedly connected and connected with an oil guide pipe, the first connecting piece is provided with first through holes distributed at equal intervals, and the telescopic end of the second telescopic rod is limitedly matched with the first through hole of the first connecting piece, and an auxiliary adjustment component is provided between the valve seat and the first connecting piece, and the auxiliary adjustment component is used to conveniently adjust the position of the butterfly plate.

[0011] Further, the auxiliary adjustment component includes an L-shaped plate, the L-shaped plate is fixed to one side of the valve seat close to the first connecting member, the L-shaped plate is fixed to a limit pin through a connecting rope, the limit pin is provided with a limit plate, the first connecting member and the L-shaped plate are respectively provided with a second through hole and a third through hole, the limit pin is limitedly matched with the third through hole of the L-shaped plate and the second through hole of the first connecting member.

[0012] Furthermore, it also includes a torsion mechanism, which is arranged between the second connecting member and the valve seat, and is used to change the state of the rotating ball. The torsion mechanism includes a connecting rod, which is fixed to the end of the second connecting member away from the rotating ball, and the connecting rod is rotatably connected to a spline rod, and a portion of the connecting rod close to the spline rod is provided with a spline, and the spline rod is spline-connected to a rotating sleeve, and the rotating sleeve cooperates with the connecting rod spline, and the valve seat is fixed with a one-way rotating wheel through a mounting plate, and the one-way rotating wheel is provided with a rotating portion and a fixed portion, and the rotating portion of the one-way rotating wheel is fixed to the spline rod, and a connecting component is provided between the connecting rod and the rotating sleeve, and the connecting component is used to fix the rotating sleeve.

[0013] Further, the connecting assembly includes a first limit block, the first limit block is fixedly connected to the connecting rod, the connecting rod is slidably connected to a second limit block, a third elastic member is fixedly connected between the second limit block and the second connecting member, and a side of the rotating sleeve close to the second connecting member is fixedly connected to limit hooks distributed at equal intervals in the circumferential direction, and the limit hooks are limitedly matched with the first limit block and the second limit block.

[0014] Furthermore, the first limiting block and the second limiting block are both configured to be truncated cone-shaped, the diameters of the first limiting block and the second limiting block on opposite sides are larger than the diameters of the opposite sides, and the limiting hook is configured to be made of an elastic metal material.

[0015] The present invention has the following advantages: the present invention reduces the impact force of high-pressure liquid on the butterfly plate by adjusting the rotation angle of the rotating ball, avoids the liquid pressure suddenly increasing and impacting the butterfly plate, causes the butterfly plate to deform and reduces the sealing performance, and prolongs the service life of the butterfly plate; the present invention adopts a valve seat and a rotating ball made of heat-resistant alloy steel and a sealing member made of perfluoroether rubber, thereby improving the high temperature resistance and wear resistance of the present invention and prolonging the service life of the present invention; the present invention completely blocks the valve seat by rotating the rotating ball, stops the liquid from flowing along the pipeline, and the rotating ball does not rotate when the liquid in the pipeline flows normally, thereby ensuring that the degree of wear between the rotating ball and the valve seat is small, and the sealing performance between the rotating ball and the valve seat is guaranteed, thereby ensuring that after the sealing performance between the butterfly plate and the sealing member is reduced, the pipeline can be throttled and blocked in time, thereby improving the safety strength of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 It is a cross-sectional view of the valve seat and the rotating ball and other parts of the present invention;

[0018] Figure 3 It is a cross-sectional view of the valve seat and the rotating ball of the present invention;

[0019] Figure 4 It is a cross-sectional view of the valve seat, the rotating ball and the first connecting member of the present invention;

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the fixing plate and gears and other parts of the present invention;

[0021] Figure 6 It is a cross-sectional view of parts such as a supporting shell and an elastic diaphragm of the present invention;

[0022] Figure 7 It is a bottom view of the rack and rotating sleeve and other parts of the present invention;

[0023] Figure 8 It is a rear view of the arc-shaped telescopic rod and the second telescopic rod and other parts of the present invention;

[0024] Fig. 9 It is a side view of the L-shaped plate and the limit pin and other parts of the present invention;

[0025] Fig.10 It is a cross-sectional view of parts such as a connecting rod and a spline rod of the present invention.

[0026] The meanings of the reference numerals in the figure are as follows: 1: valve seat, 2: rotating ball, 3: first connecting member, 4: second connecting member, 5: sealing member, 6: first connecting shaft, 7: second connecting shaft, 8: butterfly plate, 9: supporting frame, 10: limiting plate, 11: handle, 12: rotating plate, 13: first elastic member, 14: fixed plate, 15: second elastic member, 16: supporting shell, 17: flange, 18: elastic diaphragm, 19: first telescopic rod, 20: rack, 21: gear, 22: arc-shaped telescopic rod, 23: second telescopic rod, 231: L-shaped plate, 232: limiting pin, 24: connecting rod, 25: spline rod, 26: rotating sleeve, 27: one-way rotating wheel, 28: first limiting block, 29: second limiting block, 30: third elastic member, 31: limiting hook. DETAILED DESCRIPTION

[0027] Reference to an embodiment herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] After research, it was found that when the butterfly valve is in a fully closed state, when the liquid pressure in the pipeline increases, the liquid in the pipeline will cause a one-way impact or one-way extrusion on the butterfly plate, causing the butterfly plate and valve stem to deform after the butterfly valve is used for a long time, causing the butterfly valve seal to fail and unable to control the flow state in the pipeline. In order to overcome the above problems, the following solutions are proposed.

[0029] Example 1: A high temperature wear-resistant butterfly valve, reference Figure 1-Figure 5, comprising a valve seat 1, the middle part of the valve seat 1 is set to be spherical, the middle part of the valve seat 1 is sealed and rotatably connected with a rotating ball 2, a sealing ring is arranged between the inner wall of the valve seat 1 and the rotating ball 2, the upper side of the valve seat 1 is rotatably connected with a first connecting member 3, the lower side of the valve seat 1 is rotatably connected with a second connecting member 4, the opposite ends of the first connecting member 3 and the second connecting member 4 are fixedly connected to the rotating ball 2, the first connecting member 3 and the second connecting member 4 are used to limit the rotation direction of the rotating ball 2, the first connecting member 3 and the second connecting member 4 are sealed with the valve seat 1, the first connecting member 3 and the second connecting member 4 are both installed with a sealing ring between the valve seat 1, a channel is arranged in the middle part of the rotating ball 2, a sealing member 5 is fixedly connected to the inner wall of the channel of the rotating ball 2, and the rotating The upper side of the ball 2 is rotatably connected with a first connecting shaft 6, and the lower side of the rotating ball 2 is rotatably connected with a second connecting shaft 7. The first connecting shaft 6 passes through the first connecting member 3 and the two are rotatably connected. The central axis of the first connecting shaft 6 coincides with the central axis of the second connecting shaft 7. A butterfly plate 8 is fixedly connected between the opposite ends of the second connecting shaft 7 and the first connecting shaft 6. The butterfly plate 8 is sealed with the sealing member 5. When the butterfly plate 8 is perpendicular to the flow direction of the liquid, the peripheral side of the butterfly plate 8 will squeeze the sealing member 5, thereby deforming the sealing member 5, and then the butterfly plate 8 will seal the channel in the middle of the rotating ball 2. The first connecting shaft 6 is fixedly connected with a support frame 9, and the support frame 9 is fixedly connected with a limit plate 10. The limit plate 10 is provided with teeth. The shaft 6 passes through the support frame 9 and the limit plate 10, and a handle 11 is fixedly connected to the upper end of the first connecting shaft 6. The handle 11 is rotatably connected to a rotating plate 12 through a rotating shaft. A torsion spring is sleeved on the rotating shaft of the rotating plate 12. When the rotating plate 12 rotates along the handle 11, the torsion spring between the rotating plate 12 and the handle 11 will be tightened, and the left end of the rotating plate 12 is limited by the teeth of the limit plate 10. A first elastic member 13 is fixedly connected between the first connecting member 3 and the valve seat 1, and the first elastic member 13 is configured as a torsion spring. A fixed disk 14 is fixedly connected to the lower end of the second connecting member 4, and a second elastic member 15 is fixedly connected between the fixed disk 14 and the valve seat 1, and the second elastic member 15 is configured as a torsion spring. A torsion spring is provided between the valve seat 1 and the second connecting member 4. A driving mechanism is provided, which is used to change the state of the rotating ball 2. A limiting mechanism is provided between the handle 11 and the first connecting member 3, and the limiting mechanism is used to connect the first connecting member 3 and the first connecting shaft 6. The water outlet diameter of the valve seat 1 is the same as the diameter of the middle channel of the rotating ball 2, thereby reducing the flow resistance of the liquid through the valve seat 1 and the rotating ball 2. The valve seat 1 and the rotating ball 2 are both made of heat-resistant alloy steel, thereby improving the high temperature resistance and wear resistance of the valve seat 1 and the rotating ball 2. A thickened portion is provided on the outer side of the sealing member 5 to increase the service life of the sealing member 5. The first connecting shaft 6 and the second connecting shaft 7 both pass through the sealing member 5, and the sealing member 5 is made of perfluoroether rubber to maintain sealing and wear resistance under high temperature conditions.

[0030] refer to Figure 2 and Figure 5-Figure 7The driving mechanism includes a support shell 16, which is fixedly connected to the water inlet of the valve seat 1. A flange 17 is fixedly connected to the right side of the support shell 16. A through hole identical to the flange 17 is provided at the left end of the valve seat 1. An elastic diaphragm 18 is fixedly connected to the support shell 16. The elastic diaphragm 18 is used to detect the liquid pressure in the pipeline. The elastic diaphragm 18 and the support shell 16 are sealed and cooperated to form a closed cavity. Hydraulic oil is filled in the closed cavity of the support shell 16 and the elastic diaphragm 18. When the liquid pressure in the pipeline increases, the elastic diaphragm 18 is deformed, and the hydraulic oil pressure between the support shell 16 and the elastic diaphragm 18 increases. The valve seat 1 is fixedly connected to a first telescopic rod 19 through a mounting seat. The first telescopic rod 19 is an existing ordinary hydraulic The driving telescopic rod has no specific structure shown in the figure. The first telescopic rod 19 is connected to the closed cavity through an oil guide pipe. The valve seat 1 is slidably connected to the rack 20 through the mounting seat. The second connecting member 4 is fixedly connected to the gear 21. The gear 21 is meshed with the rack 20. The telescopic end of the first telescopic rod 19 is in squeeze contact with the rack 20. After the liquid pressure in the pipeline increases, the telescopic end of the first telescopic rod 19 will extend and squeeze the rack 20. The rack 20 moves to the left and drives the gear 21 to rotate. The diameter of the elastic diaphragm 18 is the same as the diameter of the water inlet of the valve seat 1, which is used to reduce the flow resistance of the liquid in the pipeline. The material of the elastic diaphragm 18 is the same as that of the sealing member 5, which improves the high temperature resistance and wear resistance of the elastic diaphragm 18.

[0031] refer to Figure 8 and Fig. 9 The limiting mechanism includes an arc-shaped telescopic rod 22, which is fixed to the rear side of the handle 11. The rotating shaft of the rotating plate 12 is fixed to the telescopic end of the arc-shaped telescopic rod 22 through the mounting plate. The center of the arc-shaped telescopic rod 22 is located on the central axis of the rotating shaft of the rotating plate 12. When the rotating plate 12 rotates along the handle 11, the telescopic end of the arc-shaped telescopic rod 22 will retract. The support frame 9 is fixed with a second telescopic rod 23 through the mounting plate. The second telescopic rod 23 is filled with hydraulic oil. The arc-shaped telescopic rod 22 and the second telescopic rod 23 are fixedly connected and connected with an oil guide pipe. When the telescopic end of the arc-shaped telescopic rod 22 retracts, The hydraulic oil in the second telescopic rod 23 will flow into the arc-shaped telescopic rod 22 along the oil guide pipe. The first connecting member 3 is provided with first through holes distributed at equal intervals. The telescopic end of the second telescopic rod 23 is limitedly matched with the first through hole of the first connecting member 3. In the initial state, the second telescopic rod 23 is inserted into the first through hole of the first connecting member 3. The telescopic end of the second telescopic rod 23 is limitedly matched with the first through hole of the first connecting member 3 to connect the first connecting member 3 to the first connecting shaft 6. An auxiliary adjustment component is provided between the valve seat 1 and the first connecting member 3. The auxiliary adjustment component is used to conveniently adjust the position of the butterfly plate 8.

[0032] refer to Figure 1 and Fig. 9The auxiliary adjustment component includes an L-shaped plate 231, which is fixed to the upper side of the valve seat 1. The L-shaped plate 231 is fixed to the limit pin 232 through a connecting rope. The limit pin 232 is provided with a limit plate. The first connecting member 3 and the L-shaped plate 231 are respectively provided with a second through hole and a third through hole. The limit pin 232 is limitedly matched with the through holes of the L-shaped plate 231 and the first connecting member 3. When the butterfly plate 8 is opened, the limit pin 232 is inserted into the third through hole of the first connecting member 3 and the second through hole of the L-shaped plate 231, thereby limiting the first connecting member 3. At this time, the first connecting member 3 cannot rotate along the valve seat 1, thereby ensuring the stability of the rotating ball 2 and the butterfly plate 8.

[0033] When using this device, the staff needs to connect the valve seat 1 and the flange 17 in the pipeline, and the liquid flows in the direction from the flange 17 to the valve seat 1. After completing the installation, the staff grasps the handle 11 and lifts the rotating plate 12 (a torsion spring is fixed between the rotating plate 12 and the handle 11). The right end of the rotating plate 12 swings upward along the rotating shaft, and the torsion spring between the rotating plate 12 and the handle 11 is tightened. The rotating plate 12 and the limit plate 10 lose their limit. Before the staff lifts the rotating plate 12, the staff inserts the limit pin 232 into the third through hole of the L-shaped plate 231 and the second through hole of the first connecting member 3. At this time, the first connecting member 3 is in a fixed state, and the channel of the rotating ball 2 is always in a connected state with the valve seat 1. During the lifting process of the rotating plate 12, the rotating shaft of the rotating plate 12 drives the telescopic end of the arc-shaped telescopic rod 22 to contract through the mounting plate, and the arc-shaped telescopic rod 22 extracts the hydraulic oil in the second telescopic rod 23 through the oil guide pipe. The telescopic rod of the second telescopic rod 23 contracts, and the telescopic rod of the second telescopic rod 23 loses its limit position with the first through hole of the first connecting member 3. Then the staff member rotates the handle 11 counterclockwise, and the handle 11 drives the first connecting shaft 6 to rotate counterclockwise. The first connecting shaft 6 rotates along the first connecting member 3, and the first connecting shaft 6 drives the butterfly plate 8 to rotate. The butterfly plate 8 and the seal 5 lose their extrusion, and the seal 5 and the butterfly plate 8 lose their seal. Then the two sides of the butterfly plate 8 are in a connected state. When the handle 11 is rotated to a suitable angle, the staff member releases the rotating plate 12, and the rotating plate 12 is reset under the elastic force of the torsion spring. The rotating plate 12 is again limited by the teeth of the limit plate 10. When the rotating plate 12 is reset, it also drives the telescopic end of the arc-shaped telescopic rod 22 to reset. At this time, the hydraulic oil in the arc-shaped telescopic rod 22 flows back to the second telescopic rod 23 through the oil guide pipe, and the telescopic end of the second telescopic rod 23 is again limited by the adjacent first through hole of the first connecting member 3.

[0034] When it is necessary to reset the butterfly plate 8, the staff only needs to lift the rotating plate 12 and rotate the handle 11 to reset it. At this time, the butterfly plate 8 will squeeze the sealing member 5 again, so that the butterfly plate 8 and the sealing member 5 are sealed and matched, and the butterfly valve is in a closed state. Then the staff will remove the limit pin 232 from the third through hole of the L-shaped plate 231 and the second through hole of the first connecting member 3 to release the fixed state of the first connecting member 3. When the butterfly valve is in a closed state and the liquid pressure in the pipeline increases instantly, the liquid in the pipeline will squeeze the elastic diaphragm 18, the elastic diaphragm 18 will be deformed, and the volume between the elastic diaphragm 18 and the supporting shell 16 will be reduced. The hydraulic oil in the closed cavity of the supporting shell 16 and the elastic diaphragm 18 will flow into the first telescopic rod 19 along the oil guide pipe. The telescopic end of the first telescopic rod 19 extends outward and squeezes the rack 20. The rack 20 slides to the left along the adjacent mounting seat, and the rack 20 drives the gear 21 to rotate, and the gear 21 drives the second connecting member 4 to rotate. The connecting piece 4 drives the fixed plate 14 to rotate synchronously, and the second connecting piece 4 drives the rotating ball 2 and the first connecting piece 3 to rotate synchronously. At this time, the first elastic piece 13 and the second elastic piece 15 are tightened. The greater the instantaneous change value of the liquid pressure in the pipeline is, the greater the rotation angle of the rotating ball 2 is. Since the second telescopic rod 23 and the first through hole of the first connecting piece 3 are in a limited state, when the rotating ball 2 swings, the support frame 9 and the first connecting shaft 6 will rotate synchronously with the first connecting piece 3, and the butterfly plate 8 and the rotating ball 2 are in a relatively static state. The butterfly plate 8 always blocks the channel of the rotating ball 2. When the rotating ball 2 rotates, the central axis of the channel of the rotating ball 2 is deflected from the central axis of the valve seat 1, and the rotating ball 2 blocks the water inlet of the valve seat 1 (not completely blocked here), thereby reducing the impact force of the liquid in the pipeline on the butterfly plate 8, avoiding the sudden increase in liquid pressure to impact the butterfly plate 8, causing the butterfly plate 8 to deform and reduce the sealing performance, thereby extending the service life of the butterfly plate 8.

[0035] When the liquid in the pipeline returns to the initial pressure, the rotating ball 2 and the parts connected thereto are all reset under the elastic force of the first elastic member 13 and the second elastic member 15, and the central axis of the channel on the rotating ball 2 coincides with the central axis of the valve seat 1 again (the butterfly plate 8 and the channel of the rotating ball 2 are always in a sealed state), and the rotating ball 2 drives the gear 21 to reset through the second connecting member 4, and the gear 21 and the rack 20 transmit the transmission, and the rack 20 slides to the right and resets, and the rack 20 squeezes the telescopic end of the first telescopic rod 19 to the right, and the hydraulic oil in the first telescopic rod 19 flows back to the cavity of the support shell 16 and the elastic diaphragm 18 through the oil guide pipe.

[0036] After research, it was found that the existing butterfly valve directly lost the ability to throttle the liquid in the pipeline after the sealing shape was reduced. If the butterfly valve cannot be closed in time, it may cause serious production or construction accidents in serious cases. Therefore, the following solution is proposed to improve the butterfly valve.

[0037] Example 2: Based on Example 1, Figure 7 and Fig.10 , also includes a torsion mechanism, which is arranged between the second connecting member 4 and the valve seat 1, and is used to change the state of the rotating ball 2. The torsion mechanism includes a connecting rod 24, which is fixed to the lower end of the second connecting member 4, and the central axis of the second connecting member 4 coincides with the central axis of the connecting rod 24. The connecting rod 24 is rotatably connected to a spline rod 25, and a spline is arranged at the lower part of the connecting rod 24. The spline arranged on the connecting rod 24 is the same as the spline of the spline rod 25. The spline of the spline rod 25 is spline-connected to a rotating sleeve 26, and the rotating sleeve 26 is used to drive the spline rod 25 and the connecting rod 24 to rotate. The rotating sleeve 26 is splined with the connecting rod 24, and the valve seat 1 is fixedly connected with a one-way rotating wheel 27 through a mounting plate. The one-way rotating wheel 27 is divided into a fixed part and a rotating part. The fixed part of the one-way rotating wheel 27 is fixedly connected to the valve seat 1 through the mounting plate, and the rotating part of the one-way rotating wheel 27 is fixedly connected to the spline rod 25. A ratchet pawl is installed between the fixed part and the rotating part of the one-way rotating wheel 27. The one-way rotating wheel 27 is an existing structure and is not shown in the accompanying drawings. The rotating part of the one-way rotating wheel 27 can only rotate counterclockwise. A connecting component is arranged between the connecting rod 24 and the rotating sleeve 26, and the connecting component is used to fix the rotating sleeve 26.

[0038] refer to Fig.10 The connecting assembly includes a first limit block 28, the first limit block 28 is fixedly connected to the connecting rod 24, the connecting rod 24 is slidably connected to the second limit block 29, a gap is provided between the first limit block 28 and the second limit block 29, a third elastic member 30 is fixedly connected between the second limit block 29 and the second connecting member 4, and the third elastic member 30 is configured as a tension spring. The upper side of the rotating sleeve 26 is fixedly connected to three limit hooks 31 distributed at equal intervals in the circumferential direction, and the upper side of the limit hook 31 is provided with an inclined surface, and the limit hook 31 and the first limit block 2 8 and the second limit block 29 are both limited and matched, the first limit block 28 and the second limit block 29 are both set to a truncated cone shape, the action force between the three limit hooks 31 and the second limit block 29 is greater than the pulling force of the third elastic member 30, the diameters of the first limit block 28 and the second limit block 29 on the opposite sides are greater than the diameters on the opposite sides, the limit hook 31 is set to an elastic metal material, when the limit hook 31 squeezes the first limit block 28 upward, the three limit hooks 31 will be deformed after being squeezed, and the upper ends of the three limit hooks 31 will move away from each other.

[0039] After a long period of use, if the sealing between the rotating ball 2 and the butterfly plate 8 is reduced and causes leakage, it is necessary to urgently throttle the liquid in the pipeline. The staff rotates and pushes the rotating sleeve 26 upward, and the rotating sleeve 26 slides upward. The spline rod 25 rotates along the connecting rod 24 until the spline of the spline rod 25 matches the spline of the lower part of the connecting rod 24. The rotating sleeve 26 slides upward and cooperates with the spline of the lower part of the connecting rod 24. At this time, the rotating sleeve 26 is splined with the connecting rod 24 and the spline rod 25. In the initial state, the rotating sleeve 26 is located at the lower part of the spline rod 25. When the liquid pressure in the pipeline increases and the rotating ball 2 rotates, the second connecting member 4 will drive the connecting rod 24 to rotate synchronously, but the spline rod 25 does not rotate. When the rotating sleeve 26 slides upward, the rotating sleeve 26 drives the three limit hooks 31 thereon to move upward synchronously. The inclined surface of the limit hook 31 is deformed after contacting the first limit block 28. When the upper end of the limit hook 31 exceeds the first limit block 28, the limit The positioning hook 31 is reset under the action of its own elastic force, and the three limiting hooks 31 are limitedly matched with the upper side surface of the first limiting block 28, and the rotating sleeve 26 is limited between the connecting rod 24 and the spline rod 25. The staff uses a tool to rotate the rotating sleeve 26, and the connecting rod 24 and the spline rod 25 will rotate synchronously, and the connecting rod 24 drives the second connecting member 4 to rotate, and the second connecting member 4 drives the rotating ball 2 to rotate (the channel between the butterfly plate 8 and the rotating ball 2 is in a blocked state), the rotating ball 2 rotates counterclockwise, and the spline rod 25 drives the rotating part of the one-way rotating wheel 27 to rotate, the first elastic member 13 and the second elastic member 15 are gradually tightened, and the gear 21 drives the rack 22 to move, and the rack 22 loses contact with the telescopic end of the first telescopic rod 19, and the channel of the rotating ball 2 is sealed by the valve seat 1. When the liquid in the pipeline flows normally, the rotating ball 2 will not rotate, thereby ensuring that the wear between the rotating ball 2 and the valve seat 1 is small, and the sealing between the rotating ball 2 and the valve seat 1 is guaranteed.

[0040] When the channel of the rotating ball 2 is completely disconnected from the valve seat 1, the liquid in the pipeline is divided on both sides of the rotating ball 2. Then the rotating sleeve 26 stops rotating. Under the limiting action of the one-way rotating wheel 27, the elastic force of the first elastic member 13 and the second elastic member 15 is not released. The rotating ball 2 maintains the existing state, and the valve seat 1 is sealed by the rotating ball 2 to ensure that the pipeline can be throttled and sealed in time after the sealing between the butterfly plate 8 and the sealing member 5 is reduced, thereby improving the safety strength of the butterfly valve.

[0041] If it is necessary to reset the rotating ball 2, the staff pushes the rotating sleeve 26 upward, and the rotating sleeve 26 drives the three limit hooks 31 to continue to move upward. The inclined surfaces of the three limit hooks 31 squeeze the second limit block 29 and deform. Then the staff slides the rotating sleeve 26 downward, and the rotating sleeve 26 drives the second limit block 29 to move downward through the three limit hooks 31. The third elastic member 30 is stretched, and the elastic force of the third elastic member 30 is less than the force between the three limit hooks 31 and the second limit block 29. When the second limit block 29 contacts the first limit block 28, the second limit block 29 stops moving downward, and the three limit hooks 31 continue to move downward and expand , until the three limit hooks 31 lose contact with the second limit block 29, under the elastic force of the third elastic member 30, the second limit block 29 is reset, and then the three limit hooks 31 directly contact the first limit block 28. As the rotating sleeve 26 moves downward, the three limit hooks 31 return to their initial state under the action of their own elastic force. When the rotating sleeve 26 loses the fit with the lower spline of the connecting rod 24, under the elastic force of the first elastic member 13 and the second elastic member 15, the second connecting member 4 drives the connecting rod 24 and the parts thereon to reset. At this time, the rotating ball 2 also returns to its initial state, and the central axis of the channel of the rotating ball 2 coincides with the central axis of the valve seat 1 again.

[0042] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A high temperature wear-resistant butterfly valve, characterized in that: The invention comprises a valve seat (1), wherein the middle part of the valve seat (1) is sealed and rotatably connected to a rotating ball (2), one side of the valve seat (1) is rotatably connected to a first connecting member (3) and the other side is rotatably connected to a second connecting member (4), the opposite ends of the first connecting member (3) and the second connecting member (4) are both fixedly connected to the rotating ball (2) and sealably cooperate with the valve seat (1), a channel is provided in the middle part of the rotating ball (2), a sealing member (5) made of a wear-resistant material is fixedly connected to the inner wall of the channel of the rotating ball (2), one side of the rotating ball (2) is rotatably connected to a first connecting shaft (6) and the other side is rotatably connected to a second connecting shaft (7), the first connecting shaft (6) passes through the first connecting member (3) and the two are rotatably connected, and the opposite ends of the second connecting shaft (7) and the first connecting shaft (6) are connected together. A butterfly plate (8) is fixedly connected to the sealing member (5) and is sealed with the butterfly plate (8); the first connecting shaft (6) passes through and is fixedly connected to a support frame (9) and a limit plate (10); a handle (11) is fixedly connected to the outer end of the first connecting shaft (6); the handle (11) is rotatably connected to a rotating plate (12) that is limitedly matched with the limit plate (10) through a rotating shaft; a first elastic member (13) is fixedly connected between the first connecting member (3) and the valve seat (1); an end of the second connecting member (4) away from the butterfly plate (8) is fixedly connected to a fixed plate (14); a second elastic member (15) is fixedly connected between the fixed plate (14) and the valve seat (1); a driving mechanism is provided between the valve seat (1) and the second connecting member (4); and a limit mechanism is provided between the handle (11) and the first connecting member (3); The driving mechanism comprises a support shell (16), the support shell (16) being fixedly connected to the water inlet of the valve seat (1), a flange (17) being fixedly connected to the side of the support shell (16) away from the valve seat (1), an elastic diaphragm (18) being fixedly connected to the support shell (16), the elastic diaphragm (18) and the support shell (16) being sealed and matched to form a closed cavity, the closed cavity between the support shell (16) and the elastic diaphragm (18) being filled with hydraulic oil, the valve seat (1) being fixedly connected to a first telescopic rod (19) via a mounting seat, the first telescopic rod (19) and the closed cavity being connected to an oil guide pipe, the valve seat (1) being slidably connected to a rack (20) via the mounting seat, the second connecting member (4) being fixedly connected to a gear (21), the gear (21) being meshed with the rack (20), the telescopic end of the first telescopic rod (19) being in extrusion contact with the rack (20); The limiting mechanism comprises an arc-shaped telescopic rod (22), the arc-shaped telescopic rod (22) being fixedly connected to one side of the handle (11), the rotating shaft of the rotating plate (12) being fixedly connected to the telescopic end of the arc-shaped telescopic rod (22) through a mounting plate, the center of the arc-shaped telescopic rod (22) being located on the central axis of the rotating shaft of the rotating plate (12), the supporting frame (9) being fixedly connected to a second telescopic rod (23) through the mounting plate, the second telescopic rod (23) being filled with hydraulic oil, the arc-shaped telescopic rod (22) and the second telescopic rod (23) being fixedly connected and connected by an oil guide pipe, the first connecting member (3) being provided with first through holes distributed at equal intervals, the telescopic end of the second telescopic rod (23) being limitedly matched with the first through hole of the first connecting member (3), an auxiliary adjustment component being provided between the valve seat (1) and the first connecting member (3), the auxiliary adjustment component being used for conveniently adjusting the position of the butterfly plate (8); The auxiliary adjustment component comprises an L-shaped plate (231), the L-shaped plate (231) being fixedly connected to a side of the valve seat (1) close to the first connecting member (3), the L-shaped plate (231) being fixedly connected to a limit pin (232) via a connecting rope, the limit pin (232) being provided with a limit plate, the first connecting member (3) and the L-shaped plate (231) being provided with a second through hole and a third through hole respectively, the limit pin (232) being in limited cooperation with the third through hole of the L-shaped plate (231) and the second through hole of the first connecting member (3).

2. A high temperature wear-resistant butterfly valve according to claim 1, characterized in that: The diameter of the water outlet of the valve seat (1) is the same as the diameter of the middle channel of the rotating ball (2), and both the valve seat (1) and the rotating ball (2) are made of heat-resistant alloy steel.

3. A high temperature wear-resistant butterfly valve according to claim 1, characterized in that: A thickened portion is provided on the outer side of the sealing member (5); the first connecting shaft (6) and the second connecting shaft (7) both pass through the sealing member (5); and the sealing member (5) is made of perfluoroether rubber and is used to maintain sealing performance and wear resistance under high temperature conditions.

4. A high temperature wear-resistant butterfly valve according to claim 3, characterized in that: The diameter of the elastic diaphragm (18) is the same as the diameter of the water inlet of the valve seat (1), and the material of the elastic diaphragm (18) is the same as the material of the sealing element (5).

5. A high temperature wear-resistant butterfly valve according to claim 4, characterized in that: The valve seat (1) further comprises a torsion mechanism, the torsion mechanism being arranged between the second connecting member (4) and the valve seat (1), the torsion mechanism being used to change the state of the rotating ball (2), the torsion mechanism comprising a connecting rod (24), the connecting rod (24) being fixedly connected to an end of the second connecting member (4) away from the rotating ball (2), the connecting rod (24) being rotatably connected to a spline rod (25), a portion of the connecting rod (24) close to the spline rod (25) being provided with a spline, the spline rod (25) being spline-connected to a rotating sleeve (26), the rotating sleeve (26) being spline-matched with the connecting rod (24), the valve seat (1) being fixedly connected to a one-way rotating wheel (27) via a mounting plate, the one-way rotating wheel (27) being provided with a rotating portion and a fixed portion, the rotating portion of the one-way rotating wheel (27) being fixedly connected to the spline rod (25), a connecting assembly being arranged between the connecting rod (24) and the rotating sleeve (26), the connecting assembly being used to fix the rotating sleeve (26).

6. A high temperature wear-resistant butterfly valve according to claim 5, characterized in that: The connecting assembly comprises a first limit block (28), the first limit block (28) is fixedly connected to the connecting rod (24), the connecting rod (24) is slidably connected to a second limit block (29), a third elastic member (30) is fixedly connected between the second limit block (29) and the second connecting member (4), and a side of the rotating sleeve (26) close to the second connecting member (4) is fixedly connected to limit hooks (31) distributed at circumferentially equal intervals, and the limit hooks (31) are both limitedly matched with the first limit block (28) and the second limit block (29).

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