Ball valve

Abstract

The invention relates to the technical field of valves, and discloses a ball valve, which comprises a valve body, a ball body and a sealing structure, the valve body is provided with a valve cavity, the valve body is provided with a plurality of mounting parts communicated with the valve cavity, and the ball body is rotatably arranged in the valve cavity and is provided with a first sealing surface; the sealing structure comprises a driving assembly and a plurality of sealing assemblies, the driving assembly is arranged on one side of the valve body, any sealing assembly is arranged in one mounting part in a sliding mode, when the sealing assembly is arranged in the mounting part in a sliding mode, the sealing assembly blocks the mounting part, and any sealing assembly is provided with a second sealing face matched with the first sealing face; the valve body is further provided with a plurality of communicating parts communicating with the mounting parts, and the output end of the driving assembly communicates with all the communicating parts, so that external force is applied to the sealing assembly through the communicating parts and the mounting parts, the sealing assembly is driven to slide in the mounting parts, and the second sealing faces abut against or are separated. Sealing of the valve cavity can be achieved, and the torque generated when the ball rotates can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to ball valves. Background Art

[0002] As a kind of valve, ball valves have been applied to various fields of industrial production. The characteristics of ball valves include: quick opening and closing, reliable sealing, small flow resistance, and the function of pipeline cleaning can be realized, which is also the reason why they cannot be replaced by other valves. Ball valves are divided into fixed ball valves and floating ball valves according to the form of the ball.

[0003] In the prior art, for a fixed ball valve, its ball is fixed and the seat has displacement. The seat sealing principle of the fixed ball valve can be explained by the principle of "piston pushing the ball" inside the valve body. In the current fixed ball valve, this piston force is formed by the medium pressure inside the pipeline, and at the same time, a spring is arranged inside the valve to provide spring thrust. Under the combined action of the spring force and the piston force, an effective seal can be formed between the seat and the ball. Among them, the existence of the spring force is considered to play a pre-tightening role in the case of very low pressure in the pipeline. However, during the opening and closing process of the ball, the ball will inevitably generate friction with the seat, thereby generating torque, and the generation of torque will hinder the operation of the valve. There is a phenomenon of mutual restraint between the torque and the sealing force. When trying to reduce the torque of the valve, the sealing force is often insufficient, resulting in valve leakage; when the sealing force needs to be increased, the valve torque often increases. Summary of the Invention

[0004] In view of this, the present invention provides a ball valve to solve the problem that there is a phenomenon of mutual restraint between the torque and the sealing force between the ball and the seat of the existing ball valve.

[0005] In a first aspect, the present invention provides a ball valve, comprising:

[0006] A valve body and a ball, the valve body has a valve cavity, and a plurality of installation parts communicating with the valve cavity are arranged on the valve body. The ball is rotatably arranged in the valve cavity and has a first sealing surface;

[0007] A sealing structure, comprising a driving component and a plurality of sealing components. The driving component is arranged on one side of the valve body. Any one of the sealing components is slidably arranged in one of the installation parts, and when the sealing component is slidably arranged in the installation part, the sealing component blocks the installation part. Any one of the sealing components has a second sealing surface adapted to the first sealing surface;

[0008] Among them, a plurality of communication parts communicating with the installation part are also arranged on the valve body, and the output end of the driving assembly communicates with all the communication parts, so as to apply an external force to the sealing assembly through the communication parts and the installation part, and drive the sealing assembly to slide in the installation part, so that the second sealing surface abuts against or separates from the second sealing surface.

[0009] Beneficial effects: Through the communication parts arranged on the valve body and communicating with the installation part, the output end of the driving assembly communicates with all the communication parts, so that the driving assembly communicates with the installation part through the communication parts. Since the sealing assembly blocks the installation part when sliding in the installation part, the output end of the driving assembly can apply an external force to the sealing assembly through the communication parts and the installation part, so that the sealing assembly can slide in the installation part, and the first sealing surface and the second sealing surface can abut against or separate from each other. In this way, the sealing of the valve cavity and the reduction of the torque during the rotation of the sphere can be realized.

[0010] In an alternative embodiment, the driving assembly includes a driving member and a communicating member. The driving member is arranged on one side of the valve body, one end of the communicating member communicates with the output end of the driving member, and the other end communicates with all the communication parts.

[0011] Beneficial effects: By arranging the driving assembly including a driving member and a communicating member, the driving member and the communicating member are respectively a hydraulic device and a two-way communicating pipe in this embodiment. Among them, the driving member is arranged on one side of the valve body, one end of the communicating member communicates with the output end of the driving member, and the other end communicates with all the communication parts, so that the output end of the driving member can transmit the external force to the communication parts and the installation part through the communicating member, and then the sealing assembly sliding in the installation part can receive the external force and slide under the action of the external force.

[0012] In an alternative embodiment, the driving member is a hydraulic device, the communicating member is a two-way communicating pipe, one end of the two-way communicating pipe communicates with the output end of the hydraulic device, and the other two ends respectively communicate with one of the communication parts.

[0013] Beneficial effect: By setting the driving member as a hydraulic actuator and the connecting member as a two-way connecting pipe, wherein one end of the two-way connecting pipe is connected to the output end of the hydraulic actuator, and the other two ends are respectively connected to a connecting part, so that the hydraulic oil in the hydraulic actuator can flow into the connecting part and the mounting part through the two-way connecting pipe. Since the mounting part is blocked by the sealing group, the hydraulic oil can only flow in the mounting part, so that the hydraulic oil can push the sealing component to slide in the mounting part, and the first sealing surface can abut against the second sealing surface. When the first sealing surface and the second sealing surface need to be separated, the hydraulic oil flowing into the mounting part can be extracted by the hydraulic actuator, thereby canceling the external force applied to the sealing component by the hydraulic oil, thereby causing the first sealing surface and the second sealing surface to loosen, so that when the ball rotates under the action of external force, the first sealing surface and the second sealing surface can be separated, so as to reduce the torque generated when the first sealing surface and the second sealing surface abut against each other.

[0014] In an optional embodiment, the sealing assembly includes a valve seat and a sliding member, the valve seat and the sliding member are both slidably arranged in the mounting portion, and the valve seat and the sliding member are arranged in abutment with each other, the second sealing surface is arranged on the valve seat, and the sliding member is suitable for sealing the mounting portion when it is slidably arranged in the mounting portion.

[0015] Beneficial effect: A sealing assembly is provided including a valve seat and a sliding member, wherein the sliding member is a piston ring in this embodiment, wherein the valve seat and the sliding member are both slidably arranged in the mounting portion, and the valve seat and the sliding member are arranged to abut against each other, and at the same time, a second sealing surface is arranged on the valve seat, and the sliding member can block the mounting portion when it is slidably arranged in the mounting portion, so that the valve seat and the sliding member can be driven to slide synchronously in the mounting portion through the external force provided by the output end of the driving assembly, and the mutual abutment or separation between the second sealing surface and the first sealing surface can be achieved.

[0016] In an optional embodiment, a blocking portion is provided on the sliding member, and when the sliding member is slidably disposed in the mounting portion, the blocking portion overlaps the valve body to separate the valve cavity from the mounting portion and to block the mounting portion.

[0017] Beneficial effect: By setting the blocking part on the sliding member, the blocking part is a blocking ring in this embodiment. When the sliding member is slidably set in the mounting part, the blocking part can overlap the valve body, thereby isolating the valve cavity from the mounting part, and then blocking the mounting part to ensure that external force is not released into the valve cavity.

[0018] In an optional embodiment, the sealing assembly further includes a biasing member, which is configured to deform under an external force and have elastic force, and the biasing member is disposed between the valve seat and the sliding member to drive the valve seat and the sliding member to separate by elastic force.

[0019] Beneficial effects: By providing that the sealing assembly further includes a biasing member, which is a spring in this embodiment, the biasing member is configured to be deformable under an external force and have the property of elastic force. Specifically, the biasing member is provided between the valve seat and the sliding member. Thus, when an external force is applied to the sliding member at the output end of the driving assembly, the sliding member will approach the valve seat, thereby squeezing the biasing member, causing the biasing member to deform and have elastic force. Furthermore, when the external force is withdrawn by the driving assembly, the biasing member can drive the sliding member and the valve seat to separate from each other by elastic force, so that when the sphere rotates in the valve cavity, the biasing member can convert part of the torque generated between the first sealing surface and the second sealing surface into elastic force, thereby reducing the torque received by the sphere.

[0020] In an alternative embodiment, the sealing assembly further includes a first seal, a second seal, and a third seal. The first seal is provided between the valve seat and the sliding member, the second seal is provided between the sliding member and the valve body, and the third seal is provided between the blocking portion and the valve body.

[0021] Beneficial effects: By providing that the sealing assembly further includes a first seal, a second seal, and a third seal, the first seal, the second seal, and the third seal are respectively a first sealing ring, a second sealing ring, and a third sealing ring in this embodiment. Among them, the first seal is provided between the valve seat and the sliding member, thereby sealing the gap between the valve seat and the sliding member; the second seal is provided between the sliding member and the valve body, thereby sealing the gap between the sliding member and the valve body; the third seal is provided between the blocking portion and the valve body, thereby sealing the gap between the blocking portion and the valve body. Furthermore, it can prevent the medium from flowing into the installation part or the hydraulic oil from flowing into the valve cavity.

[0022] In an alternative embodiment, a relief portion communicating with the valve cavity is further formed on the valve body; an operating structure is further included, and the operating structure includes a bracket and a valve stem. The bracket is provided on the valve body corresponding to the relief portion, the valve stem is rotatably provided on the bracket, and one end of the valve stem passes through the relief portion and is connected to the sphere, and the other end is adapted to receive an external force to drive the sphere to rotate.

[0023] Beneficial effects: Through the relief portion formed on the valve body and the operating structure connected to the valve body, the relief portion is a relief hole in this embodiment. Among them, the relief portion is in communication with the valve cavity. The operating structure includes a bracket and a valve stem. The bracket is provided on the valve body corresponding to the relief portion, and the valve stem is rotatably provided on the bracket. One end of the valve stem passes through the relief portion and is connected to the sphere, and the other end can receive an external force. Thus, under the action of the external force, the valve stem can drive the sphere to rotate in the valve cavity.

[0024] In an optional embodiment, the operating structure further includes an operating member, the operating member is connected to an end of the valve stem away from the sphere, and the operating member is suitable for receiving an external force to drive the valve stem to rotate.

[0025] Beneficial effect: By setting the operating structure to also include an operating member, the operating member in this embodiment is an operating hand wheel, and the operating member is specifically connected to the end of the valve stem away from the sphere. In this way, when the staff applies external force to the valve stem, the external force is transmitted to the valve stem through the operating member, thereby facilitating the staff to apply external force to the valve stem to make it rotate.

[0026] In an optional embodiment, the operating structure further comprises a sealing member, wherein the sealing member is adapted to cover the easing portion and is connected to the valve body to seal the easing portion.

[0027] Beneficial effect: By setting the operating structure to also include a sealing member, which is a sealing plate in this embodiment, the sealing member can cover the concession part and connect it with the valve body, thereby blocking the concession part, thereby preventing the medium from flowing into the valve cavity from the outside or the medium in the valve cavity from flowing out to the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic plan view of a ball valve according to an embodiment of the present invention;

[0030] Figure 2 It is a cross-sectional schematic diagram of a valve body of a ball valve according to an embodiment of the present invention;

[0031] Figure 3 A first schematic plan view of a sealing structure of a ball valve according to an embodiment of the present invention;

[0032] Figure 4 This is a second schematic plan view of a sealing structure of a ball valve according to an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1-valve body; 11-installation part; 12-connection part; 13-displacement part; 2-ball;

[0035] 31 - Driving assembly; 311 - Driving member; 312 - Connecting member; 32 - Sealing assembly; 321 - Valve seat; 322 - Sliding member; 3221 - Blocking portion; 323 - Biasing member; 324 - First seal; 325 - Second seal; 326 - Third seal; 4 - Operating structure; 41 - Bracket; 42 - Valve stem; 43 - Operating member; 44 - Cover member. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] The following will be combined with Figures 1 to 4 , to describe the embodiments of the present invention.

[0038] According to an embodiment of the present invention, on the one hand, a ball valve is provided. As Figures 1 to 4 shown, it includes a valve body 1, a ball 2 and a sealing structure. The valve body 1 has a valve cavity, and a plurality of mounting portions 11 communicating with the valve cavity are provided on the valve body 1. The ball 2 is rotatably arranged in the valve cavity and has a first sealing surface. The sealing structure includes a driving assembly 31 and a plurality of sealing assemblies 32. The driving assembly 31 is arranged on one side of the valve body 1. Any one of the sealing assemblies 32 is slidably arranged in a mounting portion 11, and when the sealing assembly 32 is slidably arranged in the mounting portion 11, the sealing assembly 32 blocks the mounting portion 11. Any one of the sealing assemblies 32 has a second sealing surface adapted to the first sealing surface. Wherein, a plurality of communicating portions 12 communicating with the mounting portions 11 are further provided on the valve body 1. The output end of the driving assembly 31 is communicated with all the communicating portions 12, so as to apply an external force to the sealing assemblies 32 through the communicating portions 12 and the mounting portions 11, and drive the sealing assemblies 32 to slide in the mounting portions 11, so that the second sealing surface abuts against or separates from the second sealing surface.

[0039] The ball valve with the above structure is provided with a ball 2 and a sealing structure on the valve body 1. Among them, the valve body 1 has a valve cavity, and two mounting parts 11 communicating with the valve cavity are also provided on the valve body 1. The mounting part 11 is a mounting groove in this embodiment. The ball 2 is rotatably arranged in the valve cavity so that when an external force acts, the ball 2 can rotate in the valve cavity. And the ball 2 has a first sealing surface. The sealing structure specifically includes a driving component 31 and two sealing components 32. Among them, the driving component 31 is arranged on one side of the valve body 1, and the two sealing components 32 are respectively slidably arranged in one mounting part 11 so that when an external force acts, the sealing component 32 can slide in the mounting part 11. And when the sealing component 32 is slidably arranged in the mounting part 11, the sealing component 32 can block the mounting part 11 to prevent the medium from flowing into the mounting part 11. At the same time, each sealing component 32 has a second sealing surface adapted to the first sealing surface. Thus, when the sealing component 32 slides in the mounting part 11, the first sealing surface can abut against or separate from the second sealing surface. When the first sealing surface abuts against the second sealing surface, at this time, the medium will flow in the valve body 1, and the first sealing surface and the second sealing surface can seal the valve cavity at the same time to prevent the medium from flowing into the valve cavity and causing medium leakage. And when the first sealing surface and the second sealing surface are separated, at this time, no medium flows in the valve body 1. Thus, when the ball 2 rotates in the valve cavity under the action of an external force, the ball 2 will not be subjected to the torque generated when the first sealing surface and the second sealing surface abut against each other, and further enables the ball 2 to rotate more smoothly in the valve cavity and is convenient for the staff to operate, so as to improve the operation efficiency of the valve.

[0040] Specifically, a plurality of communicating parts 12 communicating with the mounting part 11 are also provided on the valve body 1. The communicating part 12 is a communicating groove in this embodiment. The output end of the driving component 31 is communicated with all the communicating parts 12. Thus, it is communicated with the mounting part 11 through the communicating part 12. And since the mounting part 11 is blocked when the sealing component 32 is slidably arranged in the mounting part 11, the output end of the driving component 31 can apply an external force to the sealing component 32 through the communicating part 12 and the mounting part 11, so that the sealing component 32 can slide in the mounting part 11 and enable the first sealing surface and the second sealing surface to abut against or separate from each other. In this way, the sealing of the valve cavity and the reduction of the torque when the ball 2 rotates can be realized.

[0041] In one embodiment, as Figure 1 shown, the driving component 31 includes a driving part 311 and a communicating part 312. The driving part 311 is arranged on one side of the valve body 1. One end of the communicating part 312 is communicated with the output end of the driving part 311, and the other end is communicated with all the communicating parts 12.

[0042] For the ball valve with the above structure, by setting the drive to include a driving member 311 and a connecting member 312. In this embodiment, the driving member 311 and the connecting member 312 are a hydraulic device and a two-way connecting pipe respectively. Among them, the driving member 311 is arranged on one side of the valve body 1. One end of the connecting member 312 is communicated with the output end of the driving member 311, and the other end is communicated with all the communicating parts 12. Thus, the output end of the driving member 311 can transmit the external force to the communicating part 12 and the mounting part 11 through the connecting member 312, and further enable the sealing assembly 32 slidably arranged in the mounting part 11 to receive the external force and slide under the action of the external force.

[0043] In one embodiment, as Figure 1 shown, the driving member 311 is a hydraulic device, the connecting member 312 is a two-way connecting pipe. One end of the two-way connecting pipe is communicated with the output end of the hydraulic device, and the other two ends are respectively communicated with a communicating part 12.

[0044] For the ball valve with the above structure, by setting the driving member 311 as a hydraulic device and setting the connecting member 312 as a two-way connecting pipe. Among them, one end of the two-way connecting pipe is communicated with the output end of the hydraulic device, and the other two ends are respectively communicated with a communicating part 12. Thus, the hydraulic oil in the hydraulic device can flow into the communicating part 12 and the mounting part 11 through the two-way connecting pipe. Since the mounting part 11 is blocked by the sealing group, the hydraulic oil can only flow in the mounting part 11, and further enable the hydraulic oil to push the sealing assembly 32 to slide in the mounting part 11, and make the first sealing surface abut against the second sealing surface. When it is necessary to separate the first sealing surface and the second sealing surface, the hydraulic oil flowing into the mounting part 11 can be pumped out by the hydraulic device, so as to cancel the external force applied by the hydraulic oil to the sealing assembly 32, and further make the first sealing surface and the second sealing surface become loose. When the sphere 2 rotates under the action of an external force, the first sealing surface and the second sealing surface can be separated to reduce the torque generated when the first sealing surface and the second sealing surface abut against each other.

[0045] In one embodiment, as Figures 2 to 4 shown, the sealing assembly 32 includes a valve seat 321 and a sliding member 322. Both the valve seat 321 and the sliding member 322 are slidably arranged in the mounting part 11, and the valve seat 321 and the sliding member 322 are arranged in contact with each other. The second sealing surface is arranged on the valve seat 321, and the sliding member 322 is adapted to block the mounting part 11 when slidably arranged in the mounting part 11.

[0046] The ball valve of the above structure includes a valve seat 321 and a sliding member 322 by setting a sealing component 32. The sliding member 322 is a piston ring in this embodiment, wherein the valve seat 321 and the sliding member 322 are both slidably set in the mounting portion 11, and the valve seat 321 and the sliding member 322 are set to abut against each other. At the same time, the second sealing surface is set on the valve seat 321, and the sliding member 322 can block the mounting portion 11 when it is slidably set in the mounting portion 11. In this way, the valve seat 321 and the sliding member 322 can be driven to slide synchronously in the mounting portion 11 by the external force provided by the output end of the driving component 31, and the mutual abutment or separation between the second sealing surface and the first sealing surface is achieved.

[0047] In one embodiment, Figures 2 to 4 As shown, a blocking portion 3221 is provided on the sliding member 322 . When the sliding member 322 is slidably disposed in the mounting portion 11 , the blocking portion 3221 overlaps the valve body 1 to separate the valve cavity from the mounting portion 11 and block the mounting portion 11 .

[0048] The ball valve of the above structure is provided with a sealing portion 3221 on the sliding member 322. The sealing portion 3221 is a sealing ring in this embodiment. When the sliding member 322 is slidably arranged in the mounting portion 11, the sealing portion 3221 can overlap the valve body 1, thereby isolating the valve cavity from the mounting portion 11, and further sealing the mounting portion 11 to ensure that external force is not released into the valve cavity.

[0049] In one embodiment, Figures 2 to 4 As shown, the sealing assembly 32 further includes a biasing member 323 , which is configured to deform under external force and have elastic force, and is disposed between the valve seat 321 and the sliding member 322 to drive the valve seat 321 and the sliding member 322 to separate by elastic force.

[0050] The ball valve of the above structure also includes a biasing member 323 by setting a sealing component 32. The biasing member 323 is a spring in this embodiment. The biasing member 323 is configured to be deformed under the action of an external force and have an elastic property, and the biasing member 323 is specifically arranged between the valve seat 321 and the sliding member 322. Therefore, when an external force is applied to the sliding member 322 at the output end of the driving component 31, the sliding member 322 will approach the valve seat 321, thereby squeezing the biasing member 323, causing the biasing member 323 to deform and have an elastic force. Then, when the driving component 31 removes the external force, the biasing member 323 can drive the sliding member 322 and the valve seat 321 to separate from each other through the elastic force, so that when the ball 2 rotates in the valve cavity, the biasing member 323 can convert part of the torque generated between the first sealing surface and the second sealing surface into elastic force, thereby reducing the torque applied to the ball 2.

[0051] In one embodiment, Figures 2 to 4As shown, the sealing assembly 32 further includes a first seal 324, a second seal 325, and a third seal 326. The first seal 324 is disposed between the valve seat 321 and the sliding member 322, the second seal 325 is disposed between the sliding member 322 and the valve body 1, and the third seal 326 is disposed between the blocking portion 3221 and the valve body 1.

[0052] For the ball valve with the above structure, by providing that the sealing assembly 32 further includes a first seal 324, a second seal 325, and a third seal 326, the first seal 324, the second seal 325, and the third seal 326 are respectively a first sealing ring, a second sealing ring, and a third sealing ring in this embodiment. Among them, the first seal 324 is disposed between the valve seat 321 and the sliding member 322 to seal the gap between the valve seat 321 and the sliding member 322. The second seal 325 is disposed between the sliding member 322 and the valve body 1 to seal the gap between the sliding member 322 and the valve body 1. The third seal 326 is disposed between the blocking portion 3221 and the valve body 1 to seal the gap between the blocking portion 3221 and the valve body 1, thereby preventing the medium from flowing into the installation portion 11 or the hydraulic oil from flowing into the valve cavity.

[0053] In one embodiment, as Figure 2 shown, the valve body 1 is further provided with a relief portion 13 communicated with the valve cavity; further included is an operating structure 4, which includes a bracket 41 and a valve stem 42. The bracket 41 is disposed on the valve body 1 corresponding to the relief portion 13. The valve stem 42 is rotatably disposed on the bracket 41, and one end of the valve stem 42 passes through the relief portion 13 to be connected to the ball 2, and the other end is adapted to receive an external force to drive the ball 2 to rotate.

[0054] For the ball valve with the above structure, through the relief portion 13 provided on the valve body 1 and the operating structure 4 connected to the valve body 1, the relief portion 13 is a relief hole in this embodiment. Among them, the relief portion 13 is communicated with the valve cavity. The operating structure 4 includes a bracket 41 and a valve stem 42. The bracket 41 is disposed on the valve body 1 corresponding to the relief portion 13, and the valve stem 42 is rotatably disposed on the bracket 41. One end of the valve stem 42 passes through the relief portion 13 to be connected to the ball 2, and the other end can receive an external force. Thus, under the action of the external force, the valve stem 42 can drive the ball 2 to rotate in the valve cavity.

[0055] In one embodiment, as Figure 1 shown, the operating structure 4 further includes an operating member 43. The operating member 43 is connected to the end of the valve stem 42 away from the ball 2, and the operating member 43 is adapted to receive an external force to drive the valve stem 42 to rotate.

[0056] The ball valve of the above structure also includes an operating member 43 by setting an operating structure 4. The operating member 43 is an operating hand wheel in this embodiment. The operating member 43 is specifically connected to the end of the valve stem 42 away from the ball body 2. In this way, when the staff applies an external force to the valve stem 42, the external force is transmitted to the valve stem 42 through the operating member 43, thereby facilitating the staff to apply an external force to the valve stem 42 to make it rotate.

[0057] In one embodiment, Figure 2 As shown, the operating structure 4 further includes a cover member 44 , which is suitable for covering the easing portion 13 and connecting with the valve body 1 to seal the easing portion 13 .

[0058] The ball valve of the above structure also includes a cover member 44 by setting the operating structure 4. The cover member 44 is a cover plate in this embodiment. The cover member 44 can cover the give-way portion 13 and connect with the valve body 1, thereby blocking the give-way portion 13, thereby preventing the medium from flowing into the valve cavity from the outside or the medium in the valve cavity from flowing out to the outside.

[0059] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A ball valve, characterized in that: include: A valve body (1) and a ball (2), wherein the valve body (1) has a valve cavity, the valve body (1) is provided with a plurality of mounting portions (11) which are connected to the valve cavity, and the ball (2) is rotatably arranged in the valve cavity and has a first sealing surface; A sealing structure, comprising a drive assembly (31) and a plurality of sealing assemblies (32), wherein the drive assembly (31) is arranged on one side of the valve body (1), any one of the sealing assemblies (32) is slidably arranged in one of the mounting portions (11), and when the sealing assembly (32) is slidably arranged in the mounting portion (11), the sealing assembly (32) blocks the mounting portion (11), and any one of the sealing assemblies (32) has a second sealing surface adapted to the first sealing surface; The valve body (1) is provided with a plurality of communication parts (12) connected to the mounting part (11); the output end of the drive assembly (31) is connected to all the communication parts (12) so as to apply an external force to the sealing assembly (32) through the communication parts (12) and the mounting part (11), and drive the sealing assembly (32) to slide in the mounting part (11), so that the second sealing surface abuts against or separates from the second sealing surface.

2. The ball valve according to claim 1, characterized in that: The driving assembly (31) comprises a driving member (311) and a connecting member (312); the driving member (311) is arranged on one side of the valve body (1); one end of the connecting member (312) is connected to the output end of the driving member (311), and the other end is connected to all the connecting parts (12).

3. The ball valve according to claim 2, characterized in that: The driving member (311) is a hydraulic machine, and the connecting member (312) is a double-connected connecting pipe, one end of which is connected to the output end of the hydraulic machine, and the other two ends of which are respectively connected to one of the connecting parts (12).

4. The ball valve according to any one of claims 1 to 3, characterized in that: The sealing assembly (32) comprises a valve seat (321) and a sliding member (322); the valve seat (321) and the sliding member (322) are both slidably arranged in the mounting portion (11), and the valve seat (321) and the sliding member (322) are arranged in abutment with each other; the second sealing surface is arranged on the valve seat (321); and the sliding member (322) is suitable for sealing the mounting portion (11) when being slidably arranged in the mounting portion (11).

5. The ball valve according to claim 4, characterized in that: The sliding member (322) is provided with a blocking portion (3221), and when the sliding member (322) is slidably disposed in the mounting portion (11), the blocking portion (3221) overlaps the valve body (1) to isolate the valve cavity from the mounting portion (11) and to block the mounting portion (11).

6. The ball valve according to claim 5, characterized in that: The sealing assembly (32) further includes a biasing member (323), which is configured to deform under the action of an external force and have an elastic force, and the biasing member (323) is arranged between the valve seat (321) and the sliding member (322) to drive the valve seat (321) and the sliding member (322) to separate by elastic force.

7. The ball valve according to claim 6, characterized in that: The sealing assembly (32) further includes a first sealing member (324), a second sealing member (325) and a third sealing member (326), wherein the first sealing member (324) is arranged between the valve seat (321) and the sliding member (322), the second sealing member (325) is arranged between the sliding member (322) and the valve body (1), and the third sealing member (326) is arranged between the sealing portion (3221) and the valve body (1).

8. The ball valve according to claim 1, characterized in that: The valve body (1) is also provided with a yielding portion (13) which is connected to the valve cavity; The valve body (1) further comprises an operating structure (4), wherein the operating structure (4) comprises a bracket (41) and a valve stem (42), wherein the bracket (41) is arranged on the valve body (1) corresponding to the yielding portion (13), and the valve stem (42) is rotatably arranged on the bracket (41), and one end of the valve stem (42) passes through the yielding portion (13) to be connected to the ball (2), and the other end is suitable for receiving an external force to drive the ball (2) to rotate.

9. The ball valve according to claim 8, characterized in that: The operating structure (4) further comprises an operating member (43), wherein the operating member (43) is connected to an end of the valve stem (42) away from the sphere (2), and the operating member (43) is suitable for receiving an external force to drive the valve stem (42) to rotate.

10. The ball valve according to claim 9, characterized in that The operating structure (4) further comprises a sealing member (44), wherein the sealing member (44) is adapted to cover the facilitating portion (13) and is connected to the valve body (1) so as to seal the facilitating portion (13).

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