Valve seat floating ball valve based on one-way bearing

Abstract

The application discloses a valve seat floating type ball valve based on one-way bearings and relates to the technical field of valve seat floating type ball valves.The valve seat floating type ball valve based on one-way bearings comprises a valve body, a ball body arranged in the valve body, floating valve seats arranged on the two sides of the ball body in the axial direction of the valve body, an upper valve rod arranged on the top of the ball body, a lower valve rod arranged on the bottom of the ball body, the upper valve rod connected with the lower valve rod through a valve rod connecting shaft to realize synchronous rotation, the periphery of the upper valve rod connected with an upper cam through a first one-way bearing, the top of the ball body connected with the end of the upper valve rod through a second one-way bearing, the bottom of the ball body connected with the end of the lower valve rod through a third one-way bearing, the periphery of the lower valve rod connected with a lower cam through a fourth one-way bearing, the upper cam and the lower cam in contact with the upper and lower ends of the floating valve seat, the first one-way bearing and the fourth one-way bearing installed in the same direction, the second one-way bearing and the third one-way bearing installed in the same direction, and the first one-way bearing and the second one-way bearing installed in opposite directions.

Description

Technical Field

[0001] This invention relates to the field of valve seat floating ball valve technology, and in particular to a valve seat floating ball valve based on a one-way bearing. Background Technology

[0002] Ball valves are primarily used to cut off or connect the medium passage in pipelines and are widely used in industries such as petroleum refining, water conservancy, power, and steel. Ball valves can be classified into floating ball valves and fixed ball valves according to their structure. Floating ball valves have only an upper stem, allowing for slight displacement of the ball. Under medium pressure, the ball shifts and presses tightly against the valve seat to achieve a seal. Fixed ball valves, on the other hand, have both upper and lower stems, allowing the ball to rotate freely only along an axis perpendicular to the valve passage. Under medium pressure, the floating valve seat moves, pressing the sealing ring tightly against the ball to ensure a seal. Fixed ball valves have a longer service life and stronger support capacity compared to floating ball valves and are often used in high-pressure environments and for large-diameter valves.

[0003] The inventors discovered that the ball in a ball valve rotates frequently during operation, generating friction with the surrounding structure. Under high pressure, the friction between the ball and the valve seat during opening or closing is detrimental, generating significant operating torque and causing substantial wear. Frictional sintering may occur between the ball and the valve seat, and in some cases, the valve seat may seize the ball, preventing the ball valve from opening and closing properly. Furthermore, the high friction between the ball and the valve seat causes wear on both the valve seat and the sealing ring, compromising the ball valve's sealing performance. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a floating ball valve based on a one-way bearing. By setting different one-way bearings in conjunction with the cam, valve stem, and ball, the floating valve seat moves away from the ball during opening or closing, thereby eliminating contact friction between the ball and the valve seat during the ball's rotation. This improves the service life of the ball valve and reduces the operating torque of the motor.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] A floating ball valve based on a one-way bearing includes a valve body, a ball disposed inside the valve body, floating valve seats disposed on both sides of the ball along the axial direction of the valve body, an upper valve stem disposed on the top of the ball, and a lower valve stem disposed on the bottom of the ball. The upper valve stem is connected to the lower valve stem through a valve stem connecting shaft to achieve synchronous rotation.

[0007] The upper valve stem is connected to the upper cam via a first one-way bearing, the top of the ball is connected to the end of the upper valve stem via a second one-way bearing, the bottom of the ball is connected to the end of the lower valve stem via a third one-way bearing, and the lower valve stem is connected to the lower cam via a fourth one-way bearing. The upper and lower cams are in contact with both ends of the floating valve seat.

[0008] The first and fourth one-way bearings, the second and third one-way bearings are installed in the same direction, while the first and second one-way bearings are installed in opposite directions.

[0009] As a further implementation, the top and bottom of the sphere are provided with fixing seats, the fixing seats are annular, and the bottom surface of the fixing seats is provided with through holes.

[0010] As a further implementation, the valve stem connecting shaft is located inside the ball, with both ends of the valve stem connecting shaft passing through through holes and engaging with the ends of the upper and lower valve stems via splines.

[0011] As a further implementation, a flat key is provided on the periphery of the inner ring of the fixed seat and the ends of the upper and lower valve stems.

[0012] As a further implementation, the second and third one-way bearings are housed in a fixed seat and connected to the ball via a flat key. The first one-way bearing is connected to the upper valve stem, and the fourth one-way bearing is connected to the lower valve stem via a flat key. There is a gap between adjacent one-way bearings.

[0013] As a further implementation, the one-way bearing has an inner keyway on the inner ring and an outer keyway on the outer ring for mating with a flat key.

[0014] As a further implementation, the one-way bearing is axially positioned by a stepped shaft and a snap ring mounted on the valve stem and ball. There is a set gap between two adjacent one-way bearings, and they do not contact each other, that is, the movement between two adjacent one-way bearings will not interfere.

[0015] As a further implementation, a spring is provided between the valve body and the floating valve seat on the side away from the ball, and the spring is in a compressed state.

[0016] As a further implementation, the floating valve seat is annular, with a circular sealing ring installed on its inner ring and a triangular sealing ring installed on its outer ring.

[0017] As a further implementation, oblong holes are provided on both sides of the floating valve seat body.

[0018] As a further implementation, a sealing plate is sleeved around the periphery of the fixed seat, with both ends of the sealing plate slidingly engaged with an elongated hole, and a sealing sleeve is provided on the sealing plate.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. This invention sets different one-way bearings to cooperate with the cam, valve stem and ball, and the installation of two adjacent one-way bearings is reversed, so that the floating valve seat moves away from the ball first during the opening or closing process of the ball valve, so that there is no contact friction between the ball and the valve seat during the rotation of the ball, which improves the service life of the ball valve and also reduces the operating torque of the motor.

[0021] 2. In this invention, the floating valve seat is in direct contact with the cam, forming a disc-shaped cam mechanism with a centrally acting follower. By setting the profile curve of the cam and relying on the elastic force of the spring, the odd number of rotations of the cam is the lift stroke and the even number of rotations is the return stroke, thereby realizing the left and right movement of the floating valve seat support, so that the valve seat and the ball do not come into contact when the state of the ball valve changes.

[0022] 3. By using the installation arrangement of the one-way bearing and the control of the forward and reverse rotation of the ball valve motor, the cam rotation and the ball rotation do not occur simultaneously, resulting in more stable control, improved opening and closing stability of the ball valve, and better performance of the ball valve in harsh working environments such as high pressure.

[0023] 4. The sealing plates on the upper and lower sides of the sphere and the sealing sleeves at both ends of the sphere move in the elongated holes on the floating valve seat to ensure the sealing performance of the device. Attached Figure Description

[0024] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0025] Figure 1 This is a schematic diagram of the overall structure of a floating ball valve based on a one-way bearing in an embodiment of the present invention.

[0026] Figure 2 This is a cross-sectional structural diagram of a floating ball valve based on a one-way bearing in an embodiment of the present invention.

[0027] Figure 3 This is a partial cross-sectional structural diagram of the working principle of the one-way bearing in the valve seat floating ball valve based on the one-way bearing in an embodiment of the present invention.

[0028] Figure 4 This is a side view of the floating ball valve based on a one-way bearing in an embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the upper valve stem structure in an embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the structure of the sphere in an embodiment of the present invention.

[0031] Figure 7 This is a schematic diagram of the structure of a one-way bearing in an embodiment of the present invention.

[0032] Figure 8 This is a schematic diagram of the structure of the floating valve seat and its sealing ring in an embodiment of the present invention.

[0033] Figure 9 This is a schematic diagram of the working state of a valve seat floating ball valve based on a one-way bearing in the conducting state according to an embodiment of the present invention.

[0034] Figure 10 This is a schematic diagram of the working state of a valve seat floating ball valve based on a one-way bearing after the first step of state change in an embodiment of the present invention.

[0035] Figure 11 This is a schematic diagram of the working state of a valve seat floating ball valve based on a one-way bearing after the second step of state change in an embodiment of the present invention.

[0036] Figure 12 This is a schematic diagram of the working state of a valve seat floating ball valve based on a one-way bearing in the closed state according to an embodiment of the present invention.

[0037] Figure 13 This is a displacement curve of the cam follower included in a valve seat floating ball valve based on a one-way bearing according to an embodiment of the present invention.

[0038] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0039] The components are: 1. Upper valve stem, 2. Lower valve stem, 3. Valve stem connecting shaft, 4. Upper cam, 5. Lower cam, 6. First one-way bearing, 7. Second one-way bearing, 8. Third one-way bearing, 9. Fourth one-way bearing, 10. Floating valve seat, 11. Spring, 12. Ball, 13. Valve body, 14. Flat key, 15. Six-tooth rectangular internal spline, 16. Flat key, 17. Internal keyway, 18. External keyway, 19. Oblong hole, 20. Triangular sealing ring, 21. Circular sealing ring, 22. Snap ring. Detailed Implementation

[0040] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0041] Example 1

[0042] In a typical embodiment of the present invention, reference is made to Figures 1-13As shown, a seat-floating ball valve based on a one-way bearing includes a valve body 13 connected to a pipeline, and a ball 12 disposed inside the valve body 13. The ball 12 can rotate inside the valve body 13 to change the open and closed states of the seat-floating ball valve.

[0043] An upper valve stem 1 is provided at the top of the ball 12, and a lower valve stem 2 is provided at the bottom. The upper valve stem 1 is connected to the lower valve stem 2 through a valve stem connecting shaft 3 to achieve synchronous rotation. Floating valve seats are provided on both sides of the ball along the axial direction of the valve body 13. This embodiment uses... Figure 2 To illustrate the direction of the diagram, the upper valve stem 1 at the top of the ball 12 and the lower valve stem 2 at the bottom of the ball 12 are arranged along the radial direction of the ball 12 or the valve body 13.

[0044] like Figure 2 As shown, an upper cam 4 is provided at the top of the ball 12. The upper valve stem 1 is connected to the upper cam 4 via a first one-way bearing 6, and the top of the ball 12 is connected to the end of the upper valve stem 1 via a second one-way bearing 7. A lower cam 5 is provided at the bottom of the ball 12. The bottom of the ball 12 is connected to the end of the lower valve stem 2 via a third one-way bearing 8, and the lower valve stem 2 is connected to the lower cam 5 via a fourth one-way bearing 9.

[0045] like Figure 5 The diagram shows the structure of the upper valve stem 1, which has a gear-shaped rectangular internal spline 15 at its end and a flat key 14 on its circumference. The lower valve stem 2 has the same structure as the upper valve stem 1.

[0046] like Figure 6 As shown, a fixed seat is provided at the center of the top and bottom of the sphere 12. The fixed seat is annular, and a through hole is provided on the bottom surface of the fixed seat to connect with the inside of the sphere. A flat key 16 is provided on the inner ring of the fixed seat.

[0047] like Figure 7 The diagram shows a schematic of a one-way bearing. The inner ring of the one-way bearing has an inner keyway 17, and the outer ring has an outer keyway 18, which are used to mate with a flat key.

[0048] like Figure 4 As shown, the valve stem connecting shaft 3 is located inside the ball 12 and distributed along the radial direction of the ball 12. Both ends of the valve stem connecting shaft 3 are provided with external splines, which are adapted to the six-tooth rectangular internal splines 15. The upper and lower ends of the valve stem connecting shaft 3 pass through through holes on the fixing seat and are fixed by the external splines engaging with the six-tooth rectangular internal splines 15 at the ends of the upper valve stem 1 and the lower valve stem 2.

[0049] Furthermore, the circumferential side of the end of the upper valve stem 1 is connected to the upper cam 4 via the first one-way bearing 6. The upper cam 4 is located above the fixed seat on the top of the ball 12. The inner ring of the upper cam 4 is also provided with a flat key. The flat key of the upper cam 4 is used to cooperate with the outer keyway 18 of the first one-way bearing 6, and the inner keyway 17 of the first one-way bearing 6 is used to cooperate with the flat key 14.

[0050] Similarly, the lower valve stem 2 is connected to the lower cam 5 via the fourth one-way bearing 9 on its circumferential side. The lower cam 5 is located below the fixed seat at the bottom of the ball 12. The inner ring of the lower cam 5 is also provided with a flat key. The flat key of the lower cam 5 is used to cooperate with the outer keyway 18 of the fourth one-way bearing 9, and the inner keyway 17 of the fourth one-way bearing 9 is used to cooperate with the flat key 14.

[0051] Furthermore, the second one-way bearing 7 and the third one-way bearing 8 are located inside the fixed seat. Their outer keyways 18 mate with the flat key 16 on the inner side of the fixed seat, and their inner keyways 17 mate with the flat keys 14 on the periphery of the ends of the upper valve stem 1 and the lower valve stem 2, respectively.

[0052] In this embodiment, the upper valve stem 1 is fixedly connected to the lower valve stem 2 via the valve stem connecting shaft 3. The upper valve stem 1 is fixedly connected to the upper cam 4, and the lower valve stem 2 is fixedly connected to the lower cam 5. The upper cam 4 and the lower cam 5 are in direct contact with the upper and lower ends of the floating valve seat 10. When the upper valve stem 1 is rotated, the lower valve stem 2 rotates synchronously with the upper valve stem 1, causing the upper cam 4 and the lower cam 5 to rotate synchronously, thereby opening up the floating valve seats 10 on both sides of the ball 12, realizing that the floating valve seats 10 on both sides of the ball move away from each other in opposite directions, and completing the separation of the floating valve seat 10 from the ball 12.

[0053] The use of one-way bearings addresses the damage caused by friction between the ball and valve seat when the ball valve is opened or closed. This is to ensure that the valve stem rotates, driving the cam to rotate, while the ball 12 remains stationary. In this embodiment, the first one-way bearing 6 and the fourth one-way bearing 9 are installed in the same direction, the second one-way bearing 7 and the third one-way bearing 8 are installed in the same direction, while the first one-way bearing 6 and the second one-way bearing 7 are installed in opposite directions.

[0054] In this embodiment, the second one-way bearing 7 and the third one-way bearing 8 rotate freely when rotating counterclockwise and transmit torque when rotating clockwise. The first one-way bearing 6 and the fourth one-way bearing 9 rotate freely when rotating clockwise and transmit torque when rotating counterclockwise.

[0055] Through the above design, when the upper valve stem 1 rotates counterclockwise, the lower valve stem 2 rotates synchronously. Simultaneously, the second one-way bearing 7 and the third one-way bearing 8 idle, while the first one-way bearing 6 and the fourth one-way bearing 9 drive the rotation, keeping the ball 12 stationary. The upper cam 4 and the lower cam 5 rotate synchronously counterclockwise with the valve stem. Similarly, when the upper valve stem 1 rotates clockwise, the upper cam 4 and the lower cam 5 remain stationary, and the ball 12 rotates synchronously clockwise with the valve stem.

[0056] The one-way bearing in this embodiment is a wedge-type one-way bearing. Due to its large radius of curvature of the contact surface and the large number of wedges, it has high load-bearing capacity, good instantaneous engagement performance, reliable operation, and long service life. It can achieve the purpose of unidirectional power transmission, driving in one direction and spinning freely in the opposite direction. The one-way bearing is connected to other workpieces by a key.

[0057] A spring 11 is provided between the valve body 13 and the floating valve seat 10 on the side away from the ball 12. The spring 11 between the floating valve seat 10 and the valve body 13 ensures the continuous contact between the floating valve seat 10 and the cam. Therefore, the spring 11 needs to be continuously compressed. At the same time, there is a compression space for the spring 11 and a movement space for the floating valve seat 10 in the inner cavity of the valve body 13.

[0058] like Figure 2 As shown, the upper cam 4 and lower cam 5 are coaxially mounted on the valve stem with the ball 12. The cams are located on the upper and lower sides of the ball 12, and the upper cam 4 and lower cam 5 are in direct contact with the floating valve seat 10. Simultaneously, on the other side of the floating valve seat 10 that contacts the cam, a spring 11 keeps the floating valve seat 10 in contact with the cam, forming a disc-shaped cam mechanism with a centrally acting follower. Before the ball 12 rotates, when the valve stem drives the cam to rotate counterclockwise, the cam can open the floating valve seat 10 that originally clamped the ball 12, so that there is no contact friction between the ball 12 and the floating valve seat 10 when the ball rotates.

[0059] like Figure 3 As shown, the one-way bearing is axially positioned by a stepped shaft and a snap ring 22 provided on the valve stem and ball. There is a set gap between the first one-way bearing 6 and the second one-way bearing 7, and the two do not contact each other, that is, the movement between the first one-way bearing 6 and the second one-way bearing 7 will not interfere.

[0060] like Figure 8 As shown, the floating valve seat 10 is annular, with a circular sealing ring 21 installed on its inner ring and a triangular sealing ring 20 installed on its outer ring. The triangular sealing ring 20 is used to seal the gap between the floating valve seat 10 and the valve body 13, and the circular sealing ring 21 is used to seal the gap between the floating valve seat 10 and the ball 12.

[0061] Furthermore, elongated holes 19 are provided on both sides of the floating valve seat 10 body. The elongated holes 19 are elongated through grooves provided on the floating valve seat 10 body. A sealing plate is sleeved on the periphery of the fixed seat. The sealing plate is rotatably connected to the fixed seat. The two ends of the sealing plate are slidably engaged with the elongated holes 19. At the same time, a sealing sleeve is provided on the sealing plate. The sealing plate and the sealing sleeve are used to seal the upper and lower sides of the ball.

[0062] like Figures 9-12As shown, the process of the ball valve changing its open / closed state in this embodiment is controlled by a drive device such as a motor connected to the valve stem 1. This is existing technology in solenoid valves, and the specific process is achieved through the following three steps:

[0063] First, the motor drives the upper valve stem 1 to rotate counterclockwise by 45°, and the ball valve is in the open state as follows. Figure 9 As shown, in the first step, the upper valve stem 1 drives the lower valve stem 2 to rotate synchronously. Through the first one-way bearing 6 and the fourth one-way bearing 9, the upper cam 4 and lower cam 5 rotate synchronously with the upper and lower valve stems. The upper and lower cams enter the lifting stage, opening the floating valve seat 10, which was originally in close contact with the ball 12, thus separating it from the ball 12 and preventing relative friction between the ball and the floating valve seat. Since the rotational directions of the one-way bearings between the valve stem, the ball 12, and the cams are opposite, the ball 12 does not rotate during this process. The state after the first step is as follows. Figure 10 As shown.

[0064] The second step involves the motor driving the upper valve stem 1 to rotate 90° clockwise. During this process, the upper valve stem 1 drives the lower valve stem 2 to rotate clockwise synchronously. The first one-way bearing 6 and the fourth one-way bearing 9 between the valve stem and the upper cam 4 and the lower cam 5 rotate freely, while the cams do not rotate. Meanwhile, the second one-way bearing 7 and the third one-way bearing 8 between the upper and lower valve stems and the ball 12 cause the ball 12 to rotate 90° clockwise synchronously with the valve stem, thus changing the opening and closing state of the ball valve. Figure 11 As shown.

[0065] Thirdly, the motor drives the upper valve stem 1 to rotate counterclockwise by 45°. During this process, the second one-way bearing 7 and the third one-way bearing 8 between the valve stem and the ball 12 idle, while the ball 12 does not rotate. The first one-way bearing 6 and the fourth one-way bearing 9 between the valve stem and the upper cam 4 and the lower cam 5 drive the cam to rotate counterclockwise with the valve stem. The cam enters the return stroke stage, while the spring 11, due to compression, releases its elastic potential energy, pushing the floating valve seat 10 towards the ball 12. At the end of the return stroke stage, the valve seat 10 and the ball 12 are in tight contact, achieving a sealing effect. (See reference...) Figure 12 As shown.

[0066] like Figure 13 The diagram shown is a cam stroke diagram provided in this embodiment. The upper cam 4 and the lower cam 5 are centrally symmetrical in shape, which can realize the synchronous movement of the floating valve seats 10 on both sides of the ball during the opening and closing process, while ensuring the continuous cyclic process of the cam rotating counterclockwise.

[0067] In this embodiment, to ensure that the cam and one-way bearing are not corroded by the fluid in the pipeline and worn by fluid impurities, and to ensure the sealing performance of the ball valve, the valve body is divided into three cavities—upper, middle, and lower—through the isolation effect of the sealing plate and sealing ring. The ball 12 is the middle cavity, the part above the upper sealing plate is the upper cavity, and the part below the lower sealing plate is the lower cavity.

[0068] like Figure 2 and Figure 8 As shown, a triangular sealing ring 20 and a circular sealing ring 21 are used between the floating valve seat 10 and the valve body 13, and between the ball 12, respectively, to ensure sealing when the floating valve seat 10 and the ball 12 are in close contact. When the floating valve seat 10 moves along the axis of the valve body 13, the circular sealing ring 21 becomes inactive, but the triangular sealing ring 20 still ensures the sealing between the floating valve seat 10 and the valve body 13. At the same time, the sealing plates on the upper and lower sides of the ball 12 and the sealing sleeves at both ends move in the groove 19 on the floating valve seat to ensure the sealing of the device.

[0069] In summary, because the one-way bearings between the valve stem, cam, and ball 12 rotate in different directions, the floating valve seat 10 in contact with the ball 12 is opened by the cam before the ball 12 rotates. After the ball 12 rotates, the floating valve seat 10 closes with the ball 12 to achieve a seal. During the rotation of the ball, no harmful contact friction is generated between the ball and the floating valve seat 10, which reduces the wear on the ball 12 and the floating valve seat 10, makes the control stable, does not easily damage the sealing performance, and greatly reduces the operating torque for changing the opening and closing state of the valve body.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A floating ball valve based on a one-way bearing, characterized in that, It includes a valve body, a ball inside the valve body, floating valve seats on both sides of the ball along the axial direction of the valve body, an upper valve stem on the top of the ball, and a lower valve stem on the bottom. The upper valve stem is connected to the lower valve stem through a valve stem connecting shaft to achieve synchronous rotation. The upper valve stem is connected to the upper cam via a first one-way bearing, the top of the ball is connected to the end of the upper valve stem via a second one-way bearing, the bottom of the ball is connected to the end of the lower valve stem via a third one-way bearing, and the lower valve stem is connected to the lower cam via a fourth one-way bearing. The upper and lower cams are in contact with both ends of the floating valve seat. The first and fourth one-way bearings, the second and third one-way bearings are installed in the same direction, while the first and second one-way bearings are installed in opposite directions.

2. The floating ball valve based on a one-way bearing according to claim 1, characterized in that, The sphere is provided with a fixing seat at the top and bottom. The fixing seat is annular and has a through hole on the bottom surface.

3. A floating ball valve based on a one-way bearing according to claim 2, characterized in that, The valve stem connecting shaft is located inside the ball, with both ends of the valve stem connecting shaft passing through through holes and engaging with the ends of the upper and lower valve stems via splines.

4. A floating ball valve based on a one-way bearing according to claim 2, characterized in that, Flat keys are provided on the inner ring of the fixed seat and on the periphery of the ends of the upper and lower valve stems.

5. A floating ball valve based on a one-way bearing according to claim 4, characterized in that, The second and third one-way bearings are located in the fixed seat and connected to the ball via a flat key. The first one-way bearing is connected to the upper valve stem and the fourth one-way bearing is connected to the lower valve stem via a flat key. Adjacent one-way bearings are axially positioned by a stepped shaft and a snap ring located on the valve stem and the ball, with a set gap, and the two do not contact each other.

6. A floating ball valve based on a one-way bearing according to claim 5, characterized in that, The one-way bearing has an inner keyway on the inner ring and an outer keyway on the outer ring for mating with a flat key.

7. A floating ball valve based on a one-way bearing according to claim 2, characterized in that, A spring is installed between the valve body and the floating valve seat on the side away from the ball, and the spring is in a compressed state.

8. A floating ball valve based on a one-way bearing according to claim 7, characterized in that, The floating valve seat is annular, with a circular sealing ring installed on its inner ring and a triangular sealing ring installed on its outer ring.

9. A floating ball valve based on a one-way bearing according to claim 8, characterized in that, The floating valve seat body has elongated holes on both sides.

10. A floating ball valve based on a one-way bearing according to claim 9, characterized in that, The fixing seat is fitted with a sealing plate around its periphery. The two ends of the sealing plate are slidably fitted with elongated holes, and a sealing sleeve is provided on the sealing plate.

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