Quick-opening ball valve

Abstract

The utility model relates to a quick-opening ball valve which comprises a valve body provided with a valve cavity and two medium inlets and outlets; the valve ball can rotate relative to the valve body, is provided with a medium channel and is connected with a valve rod; the two valve seats are located at the two medium inlets and outlets and provided with connecting channels, each valve seat comprises a sealing spherical surface, and when the sealing spherical surfaces make contact with the valve ball, the valve ball can rotate to communicate with the connecting channels through the medium channels or block the connecting channels; an elastic piece and a valve seat driving structure are arranged between the valve seat and the valve body, the valve seat overcomes the elasticity of the elastic piece when moving from the state that the sealing spherical surface is separated from the valve ball to the state that the sealing spherical surface is in contact with the valve ball, and the valve seat driving structure is used for driving the valve seat to overcome the elasticity of the elastic piece to move. When the sealing spherical surface makes contact with the valve ball, the valve seat is limited to move towards the state that the sealing spherical surface is separated from the valve ball, and the valve seat driving structure can relieve the limitation. The valve can be quickly opened or closed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a quick-opening ball valve. Background Art

[0002] A ball valve is a valve in which the opening and closing element (the ball) is driven by a valve stem and rotates around its axis. Ball valves are primarily used in pipelines to cut off, distribute, and redirect the flow of media. They achieve a tight closure with a simple 90-degree rotation and minimal torque. They are ideal for use as on / off and shut-off valves.

[0003] The valve seat is an important part of the ball valve. It is the key component of the valve sealing. When the valve is closed, the seal is achieved through the close contact between the valve seat and the valve ball.

[0004] The valve seat is usually kept in contact with the valve ball by fluid pressure to provide a seal. This method will cause greater friction resistance when the valve ball rotates due to contact with the valve seat. For valves that need to open quickly, this will affect the opening speed of the valve. Utility Model Content

[0005] Based on the above description, the utility model provides a quick-opening ball valve to solve the problem in the related technology that the valve seat is kept in contact with the valve ball by fluid pressure to play a sealing role. This method will cause the valve ball to generate greater friction resistance due to contact with the valve seat when rotating, which will affect the opening speed of the valve for valves that need to be opened quickly.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] This application provides a quick-opening ball valve, the technical solution adopted is as follows:

[0008] A quick-opening ball valve, comprising:

[0009] The valve body is provided with a valve cavity and two medium inlets and outlets communicating with the valve cavity;

[0010] a valve ball disposed in the valve cavity, the valve ball being rotatable relative to the valve body about an axis passing through the center of the ball, the valve ball being provided with a medium passage, the valve ball being connected to a valve stem extending out of the valve body, the valve stem being used to drive the valve ball to rotate;

[0011] Two valve seats are provided in the valve cavity and are respectively located at the two medium inlets and outlets. The valve seats are provided with connecting channels communicating with the medium inlets and outlets. The valve seats include a sealing spherical surface for cooperating with a valve ball. When the valve seats contact the valve ball via the sealing spherical surface, the valve ball can rotate to connect the connecting channels of the two valve seats through the medium channel, or block the connecting channels of the two valve seats.

[0012] In which, the valve seat can move relative to the valve body so that the sealing spherical surface is in contact with or disengaged from the valve ball. An elastic member is provided between the valve seat and the valve body. When the valve seat moves from a state where the sealing spherical surface is disengaged from the valve ball to a state where the sealing spherical surface is in contact with the valve ball, the elastic force of the elastic member is overcome. A valve seat driving structure is provided between the valve seat and the valve body. The valve seat driving structure is used to drive the valve seat to move from a state where the sealing spherical surface is disengaged from the valve ball to a state where the sealing spherical surface is in contact with the valve ball, and to limit the valve seat from moving to a state where the sealing spherical surface is disengaged from the valve ball when the sealing spherical surface is in contact with the valve ball, and the valve seat driving structure can release the restriction.

[0013] Preferably, the valve seat driving structure includes a pressure chamber formed between the valve seat and the valve body, and the pressure chamber is compressed when the valve seat moves from a state where the sealing spherical surface is in contact with the valve ball to a state where the sealing spherical surface is separated from the valve ball. The valve seat is suitable for driving the valve seat to move from a state where the sealing spherical surface is separated from the valve ball to a state where the sealing spherical surface is in contact with the valve ball by injecting pressure medium into the pressure chamber.

[0014] Preferably, the valve body is provided with a pressure relief hole connected to the pressure chamber, which is suitable for injecting pressure medium into the pressure chamber or discharging pressure medium in the pressure chamber through the pressure relief hole.

[0015] Preferably, the elastic member includes a spring.

[0016] Preferably, the valve stem is connected to a driving member for driving the valve stem to rotate, and the driving member includes a hydraulic motor or an electric motor.

[0017] Preferably, the valve ball is connected to a damping rod extending out of the valve body, the axis of the damping rod is coaxial with the rotation axis of the valve ball and rotates with the valve ball, the damping rod is connected to a damping device, and the valve ball includes an open state of a connecting channel connecting the two valve seats through a medium channel, and a closed state of the connecting channel blocking the two valve seats. It is suitable for providing a damping force for the rotation of the valve ball through the damping device during the subsequent rotation process when the valve ball rotates a set angle during the rotation process of the valve ball from a closed state to an open state or from an open state to a closed state.

[0018] Preferably, the damping device comprises a hydraulic damper.

[0019] Compared with the prior art, the technical solution of this application has at least the following beneficial technical effects:

[0020] 1. In the quick-opening valve of the present application, the valve seat is connected to the medium inlet and outlet through a connecting channel, and contacts the valve ball through a sealing spherical surface, thereby achieving a sealed connection with the valve ball. When the valve ball rotates to block the connecting channel, the connecting channels of the two valve seats are disconnected, thereby achieving the valve closing function. When the valve ball rotates to connect the two connecting channels through the medium channel, the two medium inlets and outlets, the two connecting channels, and the medium channel form a connecting path, thereby achieving the valve opening function. By setting the valve seat to be movable relative to the valve body, the valve seat drive structure is used to overcome the elastic force of the elastic member to drive the valve seat to move to a state where the sealing spherical surface contacts the valve ball. By limiting the movement of the valve seat, the valve seat maintains the state where the sealing spherical surface contacts the valve ball, thereby forming and maintaining a sealed connection between the valve seat and the valve ball, thereby preventing medium leakage during the normal opening or closing process of the valve. When the valve needs to be opened or closed quickly, the restriction of the valve seat on the valve seat can be released by the valve seat drive structure, and the elastic force of the elastic member can be used to move the valve seat to a state where the sealing spherical surface and the valve ball are out of contact, thereby avoiding the friction between the sealing spherical surface of the valve seat and the valve ball affecting the rotation speed of the valve ball, so that the valve can be quickly rotated to the open or closed state, realizing the function of rapid opening or closing of the valve.

[0021] 2. This application forms a pressure chamber between the valve seat and the valve body, and expands the pressure chamber by injecting a pressure medium into the pressure chamber, thereby driving the valve seat to move to a state where the sealing sphere contacts the valve ball and maintains contact with the valve ball, thereby maintaining the contact between the valve seat and the valve ball and achieving a sealing function. When necessary, the pressure medium can be discharged to compress the pressure chamber, and the elastic force of the elastic member can move the valve seat to a state where the sealing sphere disengages from the valve ball, thereby achieving the rapid opening or closing function of the valve.

[0022] 3. This application provides a damping rod connected to the valve ball, and connects the damping device via the damping rod. When the valve ball rotates, the damping rod rotates with the valve ball. During the process of the valve ball rotating from the closed state to the open state or from the open state to the closed state, that is, during the process of the valve ball switching from one state to the other, if the valve ball has not rotated to the set angle, the damper does not generate a damping force, so that the damping rod and valve ball can rotate rapidly to complete the valve opening or closing action. When the valve ball rotates to the set angle, the damping device provides a damping force for the valve ball during subsequent rotation. The damper absorbs the huge kinetic energy of the valve ball during rapid rotation, thereby preventing the kinetic energy of the rapid rotation of the valve ball from affecting the valve and extending the service life of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a quick-opening ball valve provided in an embodiment of the present utility model;

[0024] Figure 2 for Figure 1A magnified schematic diagram of area A in the middle.

[0025] Description of reference numerals:

[0026] 1. Valve body; 11. Valve cavity; 12. Medium inlet and outlet; 13. Main body; 14. Connector; 15. Inner step surface; 16. Pressure relief hole; 2. Valve ball; 21. Medium channel; 3. Valve seat; 31. Connecting channel; 32. Sealing sphere; 33. Outer step surface; 34. Support ring; 35. Limit ring; 4. Valve stem; 5. Elastic part; 6. Spring pressure ring; 7. Driving part; 8. Damping rod; 9. Damping device; a. Pressure chamber. DETAILED DESCRIPTION

[0027] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0029] It will be understood that spatial relational terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be understood that in addition to the orientations shown in the figures, spatial relational terms also include different orientations of the device in use and operation. For example, if the device in the drawings is turned over, the element or feature described as "under" or "beneath" or "beneath" the other elements will be oriented as "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include alternative orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0030] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediate element. In the following embodiments, "connection" should be understood as "electrical connection", "communication connection", etc., if the connected circuits, modules, units, etc. can transmit electrical signals or data to each other.

[0031] When used herein, the singular forms "a", "an", and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0032] Reference Figure 1-2 As shown, an embodiment of the present application provides a quick-opening ball valve, which includes a valve body 1, a valve ball 2 and two valve seats 3. The valve body 1 is provided with a valve cavity 11 and two medium inlets and outlets 12 connected to the valve cavity 11. The valve ball 2 is arranged in the valve cavity 11, and the valve ball 2 can rotate relative to the valve body 1 around an axis passing through the center of the ball. A medium channel 21 is provided on the valve ball 2. The valve ball 2 is connected to a valve stem 4 that passes through the outside of the valve body 1, and the valve stem 4 is used to drive the valve ball 2 to rotate. The two valve seats 3 are arranged in the valve cavity 11 and are respectively located at the two medium inlets and outlets 12. The valve seat 3 is provided with a connecting channel 31 that is connected to the medium inlet and outlet 12. The valve seat 3 includes a sealing spherical surface 32 for cooperating with the valve ball 2. When the valve seat 3 contacts the valve ball 2 through the sealing spherical surface 32, the valve ball 2 can rotate to the connecting channel 31 that connects the two valve seats 3 through the medium channel 21, or block the connecting channel 31 of the two valve seats 3. Among them, the valve seat 3 can move relative to the valve body 1 so that the sealing spherical surface 32 contacts or disengages from the valve ball 2. An elastic member 5 is provided between the valve seat 3 and the valve body 1. When the valve seat 3 moves from a state where the sealing spherical surface 32 is disengaged from the valve ball 2 to a state where the sealing spherical surface 32 is in contact with the valve ball 2, the elastic force of the elastic member 5 is overcome. A valve seat driving structure is provided between the valve seat 3 and the valve body 1. The valve seat driving structure is used to drive the valve seat 3 from a state where the sealing spherical surface 32 is disengaged from the valve ball 2 to a state where the sealing spherical surface 32 is in contact with the valve ball 2, and to limit the valve seat 3 from moving to a state where the sealing spherical surface 32 is disengaged from the valve ball 2 when the sealing spherical surface 32 is in contact with the valve ball 2, and the valve seat driving structure can release this restriction.

[0033] The valve seat 3 is connected to the medium inlet and outlet 12 through the connecting channel 31 and contacts the valve ball 2 through the sealing spherical surface 32, achieving a sealed connection with the valve ball 2. When the valve ball 2 rotates to block the connecting channel 31, the connecting channels 31 of the two valve seats 3 are disconnected, achieving the valve closing function. When the valve ball 2 rotates to connect the two connecting channels 31 through the medium channel 21, the two medium inlets and outlets 12, the two connecting channels 31, and the medium channel 21 form a connecting path, achieving the valve opening function. By setting the valve seat 3 movable relative to the valve body 1, the valve seat drive structure overcomes the elastic force of the elastic member 5 to drive the valve seat 3 to move to a state where the sealing spherical surface 32 contacts the valve ball 2. By limiting the movement of the valve seat 3, the valve seat 3 maintains the state where the sealing spherical surface 32 contacts the valve ball 2, forming and maintaining a sealed connection between the valve seat 3 and the valve ball 2, thereby preventing medium leakage during the normal opening or closing of the valve. When the valve needs to be opened or closed quickly, the restriction of the valve seat 3 by the valve seat drive structure can be released, and the elastic force of the elastic member 5 can be used to move the valve seat 3 to a state where the sealing spherical surface 32 and the valve ball 2 are out of contact, thereby avoiding the friction between the sealing spherical surface 32 of the valve seat 3 and the valve ball 2 affecting the rotation speed of the valve ball 2, so that the valve can be quickly rotated to the open or closed state, realizing the function of rapid opening or closing of the valve.

[0034] The axis of the valve stem 4 coincides with the rotation axis of the valve ball 2. The valve stem 4 passes through the valve body 1 and can rotate relative to the valve body 1. A seal is formed between the valve stem 4 and the valve body 1. The valve ball 2 is driven to rotate by rotating the valve stem 4 outside the valve body 1.

[0035] Reference Figure 1-2 As shown, specifically, the valve body 1 includes a spherical main body 13 and two annular connectors 14. A valve cavity 11 is formed within the main body 13. The two connectors 14 are integrally formed with the main body 13, and the inner sides of the two connectors 14 respectively form a medium inlet and outlet 12 that communicate with the valve cavity 11. To achieve the connection between the valve seat 3 and the valve body 1, the valve seat 3 is designed to be annular, with one end inserted into the connecting ring and coaxial with the connecting ring. A seal is formed between the outer wall of the valve seat 3 and the inner wall of the connecting ring. A connecting channel 31 is formed inside the valve seat 3 and communicates with the medium inlet and outlet 12. The inner wall of the valve seat 3 near one end of the valve cavity 11 is designed to be spherical, thereby forming a sealing spherical surface 32. The movement direction of the valve seat 3 is parallel to its axis, so that the valve seat 3 can move axially relative to the valve seat 3 to achieve the function of contacting or separating the sealing spherical surface 32 from the valve ball 2.

[0036] Reference Figure 1-2As shown, the valve seat driving structure includes a pressure chamber a formed between the valve seat 3 and the valve body 1. When the valve seat 3 moves from a state where the sealing spherical surface 32 is in contact with the valve ball 2 to a state where the sealing spherical surface 32 is separated from the valve ball 2, the pressure chamber a is compressed. It is suitable for injecting pressure medium into the pressure chamber a to drive the valve seat 3 to move from a state where the sealing spherical surface 32 is separated from the valve ball 2 to a state where the sealing spherical surface 32 is in contact with the valve ball 2.

[0037] By injecting pressure medium into pressure chamber a, pressure chamber a expands, forcing valve seat 3 to move until the sealing sphere 32 contacts the valve ball 2, thereby maintaining contact between valve seat 3 and valve ball 2 and achieving a sealing function. When necessary, pressure medium can be discharged to compress pressure chamber a, causing the elastic force of elastic member 5 to move valve seat 3 until the sealing sphere 32 disengages from the valve ball 2, thereby achieving rapid opening or closing of the valve.

[0038] Reference Figure 2 Specifically, in this embodiment, the valve seat 3 comprises two sections with different outer diameters, one section near the valve ball 2 having a larger outer diameter. The outer walls of the two sections are connected by an outer step surface 33. The connector 14 comprises two sections with different inner diameters, one section near the valve ball 2 having a larger inner diameter. The inner walls of the two sections are connected by an inner step surface 15. The outer wall of the section with the larger outer diameter of the valve seat 3 abuts against the inner wall of the section with the larger inner diameter of the connector 14, forming a seal. The outer wall of the section with the smaller outer diameter of the valve seat 3 abuts against the inner wall of the section with the smaller inner diameter of the connector 14, forming a seal. A gap is formed between the inner step surface 15 and the outer step surface 33, thereby forming a pressure chamber a. When the pressure chamber a expands, the inner step surface 15 and the outer step surface 33 move away from each other, causing the valve seat 3 to move closer to the valve ball 2. When the valve seat 3 moves away from the valve ball 2, the inner step surface 15 and the outer step surface 33 move closer together, compressing the pressure chamber a. Therefore, the valve seat 3 can be driven to move closer to the valve ball 2 by injecting pressure medium into the pressure chamber a, and the restriction on the movement of the valve seat 3 can be released by exhausting the pressure medium in the pressure chamber a.

[0039] Reference Figure 1-2As shown, in order to facilitate the injection of pressure medium into the pressure chamber a, a pressure relief hole 16 connected to the pressure chamber a is provided on the valve body 1, which is suitable for injecting pressure medium into the pressure chamber a or discharging the pressure medium in the pressure chamber a through the pressure relief hole 16. Specifically, a connector connected to the pressure relief hole 16 can be provided on the valve body 1 to connect to an external device through the connector so as to inject pressure medium into the pressure chamber a or discharge the pressure medium in the pressure chamber a through the pressure relief hole 16. The valve seat drive structure realizes the function of maintaining a sealed connection between the valve seat 3 and the valve ball 2, as well as the function of the contact pressure maintaining structure. When the valve needs to be opened or closed quickly, the pressure medium in the pressure chamber a can be quickly discharged, so that the valve seat 3 can quickly break away from contact with the valve ball 2, thereby shortening the time it takes to open or close the valve.

[0040] Reference Figure 1-2 As shown, the elastic member 5 can be a spring. Specifically, a support ring 34 is provided around one end of the valve seat 3 extending into the valve cavity 11. The support ring 34 is connected to a limit ring 35 surrounding the outside of the valve seat 3. The limit ring 35 is located on the side of the support ring 34 close to the valve ball 2, and one end of the limit ring 35 is fixed to the support ring 34. The support ring 34 and the limit ring 35 are both integrally formed with the valve seat 3. In addition, a spring pressure ring 6 is provided around the outside of the valve seat 3 within the valve cavity 11. The spring pressure ring 6 is fixed to the valve body 1. The spring pressure ring 6 and the support ring 34 are spaced apart in the axial direction of the valve seat 3 and in a direction away from the valve seat 3. The spring is a compression spring and is provided between the support ring 34 and the spring pressure ring 6, and is located between the limit ring 35 and the valve seat 3. During the design, the spring of the valve seat 3 is in a compressed state when the sealing spherical surface 32 is in contact with the valve ball 2, so that when the valve seat 3 is not affected by the valve seat driving structure, the spring force can move the valve seat 3 to separate from the sealing spherical surface 32 and the valve ball 2.

[0041] In this embodiment, the two medium inlets and outlets 12 are symmetrically distributed at both ends of the valve body 1. Correspondingly, the two connectors 14 are coaxially arranged, and the two valve seats 3 are also coaxially arranged. In other embodiments, the positions of the medium inlets and outlets 12 can be changed according to actual design needs.

[0042] Reference Figure 1 As shown, further, in order to realize the function of rapid opening and closing of the valve, the valve stem 4 is connected to a driving member 7 for driving its rotation. The driving member 7 can be a hydraulic motor or an electric motor, etc., to realize rapid opening or rapid closing of the valve by electric or hydraulic drive.

[0043] Reference Figure 1As shown, during the rapid opening or closing process, the valve ball 2 has enormous kinetic energy before reaching the open or closed state. This kinetic energy of the valve ball 2 can easily damage the valve structure, thereby affecting the service life of the valve. To address this problem, a damping rod 8 extending from the valve body 1 is connected to the valve ball 2. The axis of the damping rod 8 is coaxial with the rotation axis of the valve ball 2 and rotates with the valve ball 2. The damping rod 8 is connected to a damping device 9. The valve ball 2 includes an open state in which a connecting channel 31 connects the two valve seats 3 through the medium channel 21, and a closed state in which the connecting channel 31 blocks the two valve seats 3. When the valve ball 2 rotates from the closed state to the open state or from the open state to the closed state, and when the valve ball 2 rotates by a set angle, the damping device 9 provides a damping force for the rotation of the valve ball 2 during the subsequent rotation process.

[0044] Reference Figure 1 As shown, specifically, the damping rod 8 is coaxial with the valve stem 4 and is located on opposite sides of the valve body 1. The damping rod 8 extends through the valve body 1 and can rotate relative to the valve body 1, forming a seal with the valve body 1. The damping device 9 utilizes a hydraulic damper, more specifically a rotary hydraulic damper. This damper is configured to prevent the valve ball 2 from rotating to a set angle before it rotates to the other state, i.e., during the process of switching between the open and closed states, and before the valve ball 2 rotates to the set angle, the damping device 9 generates no damping force. This allows the damping rod 8 and valve ball 2 to rotate rapidly to complete the valve opening or closing operation. When the valve ball 2 rotates to the set angle, the damping device 9 activates during subsequent rotation, providing a damping force to the valve ball 2 and valve stem 4. This absorbs the significant kinetic energy of the rapid rotation of the valve ball 2 through the damper, preventing the kinetic energy of the rapid rotation of the valve ball 2 from affecting the valve and extending the service life of the valve.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A quick-opening ball valve, characterized in that: include: A valve body (1) is provided with a valve cavity (11) and two medium inlets and outlets (12) communicating with the valve cavity (11); A valve ball (2) is disposed in the valve cavity (11), the valve ball (2) being rotatable relative to the valve body (1) about an axis passing through the center of the ball, the valve ball (2) being provided with a medium passage (21), the valve ball (2) being connected to a valve stem (4) extending out of the valve body (1), the valve stem (4) being used to drive the valve ball (2) to rotate; Two valve seats (3) are provided in the valve cavity (11) and are respectively located at the two medium inlets and outlets (12); the valve seats (3) are provided with connecting channels (31) communicating with the medium inlets and outlets (12); the valve seats (3) include a sealing spherical surface (32) for cooperating with the valve ball (2); when the valve seats (3) contact the valve ball (2) via the sealing spherical surface (32), the valve ball (2) can rotate to connect the connecting channels (31) of the two valve seats (3) through the medium channel (21), or block the connecting channels (31) of the two valve seats (3); The valve seat (3) can move relative to the valve body (1) so that the sealing spherical surface (32) contacts or separates from the valve ball (2); an elastic member (5) is provided between the valve seat (3) and the valve body (1); the valve seat (3) overcomes the elastic force of the elastic member (5) when it moves from a state where the sealing spherical surface (32) is separated from the valve ball (2) to a state where the sealing spherical surface (32) contacts the valve ball (2); a valve seat driving structure is provided between the valve seat (3) and the valve body (1); the valve seat driving structure is used to drive the valve seat (3) to move from a state where the sealing spherical surface (32) is separated from the valve ball (2) to a state where the sealing spherical surface (32) contacts the valve ball (2); and when the sealing spherical surface (32) contacts the valve ball (2), it limits the valve seat (3) from moving to a state where the sealing spherical surface (32) is separated from the valve ball (2), and the valve seat driving structure can release the restriction.

2. The quick-opening ball valve according to claim 1, characterized in that: The valve seat driving structure includes a pressure chamber (a) formed between the valve seat (3) and the valve body (1), and the pressure chamber (a) is compressed when the valve seat (3) moves from a state in which the sealing spherical surface (32) is in contact with the valve ball (2) to a state in which the sealing spherical surface (32) is separated from the valve ball (2). The valve seat driving structure is suitable for injecting a pressure medium into the pressure chamber (a) to drive the valve seat (3) to move from a state in which the sealing spherical surface (32) is separated from the valve ball (2) to a state in which the sealing spherical surface (32) is in contact with the valve ball (2).

3. The quick-opening ball valve according to claim 2, characterized in that: The valve body (1) is provided with a pressure relief hole (16) connected to the pressure chamber (a), which is suitable for injecting pressure medium into the pressure chamber (a) or discharging the pressure medium in the pressure chamber (a) through the pressure relief hole (16).

4. The quick-opening ball valve according to claim 1, characterized in that: The elastic member (5) comprises a spring.

5. The quick-opening ball valve according to claim 1, characterized in that: The valve stem (4) is connected to a driving member (7) for driving the valve stem to rotate, and the driving member (7) includes a hydraulic motor or an electric motor.

6. The quick-opening ball valve according to claim 1, characterized in that: The valve ball (2) is connected to a damping rod (8) extending out of the valve body (1), the axis of the damping rod (8) is coaxial with the rotation axis of the valve ball (2) and rotates with the valve ball (2), the damping rod (8) is connected to a damping device (9), the valve ball (2) includes an open state of a connecting channel (31) connecting the two valve seats (3) through a medium channel (21), and a closed state of a connecting channel (31) blocking the two valve seats (3), suitable for providing a damping force for the rotation of the valve ball (2) through the damping device (9) during the subsequent rotation process when the valve ball (2) rotates a set angle during the rotation process from the closed state to the open state or from the open state to the closed state.

7. The quick-opening ball valve according to claim 6, characterized in that: The damping device (9) comprises a hydraulic damper.

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