Fixed ball valve

Abstract

The invention relates to the technical field of ball valves, and discloses a fixed ball valve which comprises a valve body, a valve rod and a spherical valve element, the spherical valve element is arranged in the valve body, the valve rod is arranged at the top of the spherical valve element, a handle is arranged at the top end of the valve rod, a water inlet end cover is arranged at one end of the valve body, and a water outlet end cover is arranged at the other end of the valve body. Rubber valve seats are arranged on the portions, located on the outer walls of the two ends of the spherical valve element, of the inner wall of the valve body, a first magnet ring is arranged on one side of each rubber valve seat, and a second magnet ring is arranged on the portion, located on one side of the first magnet ring, of the inner wall of the valve body. When the rubber valve seat is subjected to friction damage due to opening and closing of the ball valve, the rubber valve seat can still tightly abut against the outer side of the spherical valve element through the repulsive force, and sealing of the valve element and the valve seat is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of ball valves, in particular to a fixed ball valve. Background Art

[0002] The fixed ball valve is suitable for long-distance pipelines and general industrial pipelines. Its strength, safety, and resistance to harsh environments are specially considered in the design, and it is suitable for various corrosive and non-corrosive media. It is widely used in oil refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electricity, municipal administration, steel and other fields. It is also suitable for food processing, natural gas transportation, and water supply and heating systems in urban construction.

[0003] The existing Chinese patent (CN208221710U) discloses a fixed ball valve, including a valve stem, a gland flange, a packing ring, a valve body, bolts and a thrust pad; the valve stem is installed in the mounting hole of the valve body, a supporting convex ring is provided at the position corresponding to the valve stem and the mounting hole, the thrust pad and the packing ring are sleeved on the valve stem, an O-ring is provided between the outer wall of the packing ring and the valve body, and two O-rings are provided between the valve stem and the inner wall of the packing ring; the lower surface of the gland flange and the top of the valve body form an annular placement space formed integrally with the mounting hole, the outer wall of the packing ring is provided with an annular flange, the annular flange is located in the annular placement space, a winding pad is provided between the upper surface of the annular flange and the top of the annular placement space, and a winding pad is provided between the lower surface of the annular flange and the bottom of the annular placement space. The beneficial effect of the utility model is that it can greatly reduce the leakage of the medium between the gland flange and the valve stem.

[0004] During the opening and closing process of the existing ball valve, there is friction between the ball and the valve seat, which is easy to cause wear over a long period of time. After the valve seat is worn, it is difficult to compensate for the wear of the valve seat, which affects the sealing performance. Summary of the invention

[0005] The object of the present invention is to provide a fixed ball valve to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fixed ball valve, comprising: a valve body, a valve stem and a spherical valve core, a spherical valve core is arranged inside the valve body, a valve stem is arranged on the top of the spherical valve core, a handle is arranged on the top of the valve stem, a water inlet end cover is arranged at one end of the valve body, and a water outlet end cover is arranged at the other end, rubber valve seats are arranged on the inner wall of the valve body and the outer wall of the two ends of the spherical valve core, a first magnet ring is arranged on one side of the rubber valve seat, and a second magnet ring is arranged on the inner wall of the valve body and on one side of the first magnet ring, and the first magnet ring and the second magnet ring are in a state of repulsion of the same charge.

[0007] As a further explanation of the present invention, an upper flange is provided on the top of the valve body, and threaded holes are opened at the four corners of the upper flange, two of which are provided with limit pins, and the two limit pins are respectively located on both sides of the handle for limiting the handle.

[0008] As a further illustration of the present invention, a lower sealing gasket and an upper sealing gasket are provided on the inner wall of the valve body located on the outer wall of the valve stem, and connecting bolts are provided between the water inlet end cover and the water outlet end cover.

[0009] As a further illustration of the present invention, an outer sealing ring is provided at the connection between the water inlet end cover and the valve body, and an outer sealing ring is also provided at the connection between the water outlet end cover and the valve body.

[0010] As a further description of the present invention, a through hole is provided in the second magnet ring, and a second connecting valve is provided at one side of the bottom of the valve body.

[0011] As a further explanation of the present invention, a hollow fixing ring is provided on the inner wall of the valve body on one side of the second magnet ring, an elastic rubber sleeve is provided on one side of the hollow fixing ring, a connecting pipe is provided on one side of the hollow fixing ring, and a first connecting valve is provided at one end of the connecting pipe.

[0012] As a further illustration of the present invention, one end of the elastic rubber sleeve passes through the through hole and abuts against the first magnet ring, and the elastic rubber sleeve is connected to the hollow fixing ring.

[0013] As a further description of the present invention, a valve stem connecting hole is provided at the top of the spherical valve core, and a valve core rotating shaft is provided at the bottom end of the spherical valve core.

[0014] As a further description of the present invention, there are eight through holes, and the eight through holes are evenly arranged circumferentially on the second magnet ring.

[0015] As a further illustration of the present invention, the first magnet ring, the second magnet ring and the top end of the hollow fixing ring are all in contact with the outer wall of the spherical valve body.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides the first magnet ring, the second magnet ring and the elastic rubber sleeve, so that when the fixed ball valve is used, the repulsive force between the first magnet ring and the second magnet ring always generates pressure on the rubber valve seat, and when the rubber valve seat is damaged by friction due to the opening and closing of the ball valve, the repulsive force can still tightly abut the rubber valve seat against the outer side of the spherical valve core, thereby achieving sealing between the valve core and the valve seat; In addition, when the fixed ball valve is used, liquid with pressure can be introduced into the first connecting valve, and the first connecting valve is closed to maintain pressure, and the liquid enters the hollow fixed ring through the connecting pipe, and finally the liquid with pressure enters the elastic rubber sleeve. At this time, the elastic rubber sleeve will expand under the action of the liquid pressure, and generate pressure on the first magnet ring, so that the rubber valve seat is always in contact with the spherical valve core for sealing; In addition, when the fixed ball valve is used, compressed air is introduced into the valve body through the second connecting valve, and the compressed air passes through the gap between the through hole and the elastic rubber sleeve to act on the first magnet ring, generating pressure on the rubber valve seat, so that it is sealed with the valve core; By adopting the above method, the rubber valve seat can be in abutment and sealed with the valve seat for a long time, thereby improving the sealing performance between the rubber valve seat and the valve core, thereby improving the sealing performance of the entire fixed ball valve.

[0017] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An exploded view of a fixed ball valve of the present invention; Figure 2 A three-dimensional diagram of a fixed ball valve of the present invention; Figure 3 A three-dimensional diagram of a fixed ball valve of the present invention from another perspective; Figure 4 This is a front view of a fixed ball valve of the present invention; Figure 5 A bottom view of a fixed ball valve of the present invention; Figure 6 This is a main cross-sectional view of a fixed ball valve of the present invention; Figure 7 for Figure 6 The enlarged structural diagram at A in the middle; Figure 8 A top sectional view of a fixed ball valve of the present invention; Fig. 9 for Figure 8 The enlarged structural diagram at B in the middle; Fig.10 This is a stereoscopic view of a fixed ball valve of the present invention from another perspective.

[0019] In the figure: 1. valve body; 2. upper flange; 3. limit pin; 4. valve stem; 5. handle; 6. spherical valve core; 7. lower sealing gasket; 8. upper sealing gasket; 9. water inlet end cover; 10. water outlet end cover; 11. connecting bolts; 12. outer sealing ring; 13. rubber valve seat; 14. first magnet ring; 15. second magnet ring; 16. through hole; 17. hollow fixing ring; 18. elastic rubber sleeve; 19. valve stem connecting hole; 20. valve core rotating shaft; 21. first connecting valve; 22. second connecting valve; 23. connecting pipe. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Example 1: Please refer to Figure 1-Figure 6 The present invention provides a technical solution: a fixed ball valve, comprising: a valve body 1, a valve stem 4 and a spherical valve core 6. The valve body 1 is the main structural component of the fixed ball valve, and provides a space for accommodating the spherical valve core 6, the valve stem 4, the rubber valve seat 13, the first magnet ring 14 and the second magnet ring 15. The valve body 1 is also responsible for connecting the water inlet end cover 9 and the water outlet end cover 10, so that the entire ball valve can be connected to the fluid pipeline system.

[0022] A spherical valve core 6 is provided inside the valve body 1, a valve stem 4 is provided on the top of the spherical valve core 6, a handle 5 is provided on the top of the valve stem 4, and the valve stem 4 is connected to the top of the spherical valve core 6 to transmit the rotation force of the operator, thereby controlling the opening and closing of the spherical valve core 6. The design of the valve stem 4 allows the operator to easily control the opening and closing of the ball valve by rotating the handle 5, thereby improving the ease of use and operational flexibility of the ball valve. The spherical valve core 6 is the core component of the fixed ball valve, which controls the on and off of the fluid by rotation. When the spherical valve core 6 rotates to a specific position, the fluid can pass through the valve body 1; when the spherical valve core 6 rotates to another position, the fluid is blocked. The handle 5 is provided at the top of the valve stem 4 to provide a force point for the operator to rotate the valve stem 4.

[0023] A water inlet cover 9 is provided at one end of the valve body 1, and a water outlet cover 10 is provided at the other end. The water inlet cover 9 and the water outlet cover 10 are respectively provided at both ends of the valve body 1, and are used to connect the fluid pipeline so that the fluid can flow into and out of the ball valve. The design of the water inlet cover 9 and the water outlet cover 10 allows the ball valve to be easily connected to the fluid pipeline system, providing the necessary connection interface for the normal operation of the ball valve.

[0024] The inner wall of the valve body 1 is located at the outer wall of the two ends of the spherical valve core 6 and is provided with a rubber valve seat 13. The rubber valve seat 13 is provided on the outer wall of the inner wall of the valve body 1 at the two ends of the spherical valve core 6, and is used to provide a seal between the spherical valve core 6 and the valve body 1. The design of the rubber valve seat 13 has good elasticity and sealing performance, and can fit tightly on the outer wall of the spherical valve core 6 to prevent fluid leakage and improve the sealing reliability of the ball valve. A first magnet ring 14 is provided on one side of the rubber valve seat 13, and a second magnet ring 15 is provided on the inner wall of the valve body 1 on the side of the first magnet ring 14. The first magnet ring 14 and the second magnet ring 15 are in a state of repelling each other with the same charge. The first magnet ring 14 is provided on one side of the rubber valve seat 13, and the second magnet ring 15 is provided on the inner wall of the valve body 1 on the side of the first magnet ring 14. The first magnet ring 14 and the second magnet ring 15 are in a state of repelling each other with the same charge, and pressure is generated on the rubber valve seat 13 through repulsive force. The design of the first magnet ring 14 and the second magnet ring 15 utilizes magnetic force to enhance the fit between the rubber valve seat 13 and the spherical valve core 6, thereby improving the sealing performance of the ball valve. Even if the rubber valve seat 13 is damaged due to friction, the repulsive force of the magnet ring can still ensure that it fits tightly on the spherical valve core 6, thereby maintaining the sealing performance of the ball valve.

[0025] An upper flange 2 is provided on the top of the valve body 1, and threaded holes are provided at the four corners of the upper flange 2, wherein two threaded holes are provided with limit pins 3, and the two limit pins 3 are respectively located on both sides of the handle 5 for limiting the position of the handle 5. The limit pins 3 are screwed into the threaded holes after the handle 5 is rotated, and the two sides of the handle 5 are abutted to prevent the handle 5 from rotating closed due to vibration or the like after the ball valve is opened, or from rotating open due to vibration or the like after the ball valve is closed. After the handle 5 is rotated to the desired position (i.e., the ball valve is fully opened or fully closed), the limit pins 3 are screwed into the corresponding threaded holes. After the limit pins 3 are screwed in, their ends abut against the two sides of the handle 5, and the handle 5 is physically limited to prevent it from rotating accidentally due to vibration, external force or other reasons. The design of the limit pins 3 ensures that the ball valve can maintain a stable state after opening or closing, and avoids accidental rotation caused by vibration or the like. The operational safety and reliability of the ball valve are improved, and the failures and damages caused by improper operation or external factors are reduced.

[0026] The inner wall of the valve body 1 is provided with a lower sealing gasket 7 and an upper sealing gasket 8 on the outer wall of the valve stem 4, and a connecting bolt 11 is provided between the water inlet end cover 9 and the water outlet end cover 10. The valve stem 4 is connected to the top of the spherical valve core 6 and passes through the top opening of the valve body 1 to transmit the rotation force of the operator to control the opening and closing of the spherical valve core 6. Since the valve stem 4 moves up and down or rotates in the valve body 1, it is necessary to set a sealing device between the valve stem 4 and the inner wall of the valve body 1 to prevent fluid leakage. The lower sealing gasket 7 and the upper sealing gasket 8 are respectively arranged on the upper and lower sides of the outer wall of the valve stem 4 on the inner wall of the valve body 1. The lower sealing gasket 7 and the upper sealing gasket 8 are tightly fitted on the outer wall of the valve stem 4, providing a seal between the valve stem 4 and the valve body 1, and preventing the fluid from leaking from the gap between the valve stem 4 and the valve body 1. The design of the lower sealing gasket 7 and the upper sealing gasket 8 ensures the sealing between the valve stem 4 and the valve body 1 during the movement or rotation process, and improves the sealing reliability and service life of the ball valve. The water inlet end cover 9 and the water outlet end cover 10 are respectively arranged at the two ends of the valve body 1, and are used to connect the fluid pipeline so that the fluid can flow into and out of the ball valve.

[0027] Connection requirements: The water inlet cover 9 and the water outlet cover 10 need to be firmly connected to the valve body 1 to ensure the structural integrity and sealing of the ball valve. The connecting bolts 11 pass through the corresponding holes on the water inlet cover 9, the valve body 1 and the water outlet cover 10 to tightly connect the water inlet cover 9, the valve body 1 and the water outlet cover 10 together. The connecting bolts 11 firmly fix the water inlet cover 9, the valve body 1 and the water outlet cover 10 together by tightening the nuts to ensure the structural integrity and sealing of the ball valve.

[0028] An outer sealing ring 12 is provided at the connection between the water inlet end cover 9 and the valve body 1, and an outer sealing ring 12 is also provided at the connection between the water outlet end cover 10 and the valve body 1. The outer sealing ring 12 is respectively provided at the connection between the water inlet end cover 9 and the valve body 1 and at the connection between the water outlet end cover 10 and the valve body 1. The outer sealing ring 12 fits tightly on the contact surface between the water inlet end cover 9 (or the water outlet end cover 10) and the valve body 1, provides a seal between the end cover and the valve body 1, and prevents fluid leakage from the connection. The outer sealing ring 12 is usually made of a wear-resistant, corrosion-resistant, and highly elastic material to ensure its sealing performance and durability for long-term use. The design of the outer sealing ring 12 ensures the sealing between the water inlet end cover 9 and the water outlet end cover 10 and the valve body 1, and improves the sealing reliability and service life of the ball valve. The outer sealing ring 12 can effectively resist the erosion of fluid pressure, vibration and external environment, and maintain the long-term stable operation of the ball valve. The replacement and maintenance of the outer sealing ring 12 are relatively simple, which reduces the maintenance cost and difficulty of the ball valve.

[0029] Example 2: Please refer to Figure 1-Figure 7The present invention provides a technical solution: a fixed ball valve, comprising: a valve body 1, a valve stem 4 and a spherical valve core 6. The valve body 1 is the main structural component of the fixed ball valve, and provides a space for accommodating the spherical valve core 6, the valve stem 4, the rubber valve seat 13, the first magnet ring 14 and the second magnet ring 15. The valve body 1 is also responsible for connecting the water inlet end cover 9 and the water outlet end cover 10, so that the entire ball valve can be connected to the fluid pipeline system.

[0030] A spherical valve core 6 is provided inside the valve body 1, a valve stem 4 is provided on the top of the spherical valve core 6, a handle 5 is provided on the top of the valve stem 4, and the valve stem 4 is connected to the top of the spherical valve core 6 to transmit the rotation force of the operator, thereby controlling the opening and closing of the spherical valve core 6. The design of the valve stem 4 allows the operator to easily control the opening and closing of the ball valve by rotating the handle 5, thereby improving the ease of use and operational flexibility of the ball valve. The spherical valve core 6 is the core component of the fixed ball valve, which controls the on and off of the fluid by rotation. When the spherical valve core 6 rotates to a specific position, the fluid can pass through the valve body 1; when the spherical valve core 6 rotates to another position, the fluid is blocked. The handle 5 is provided at the top of the valve stem 4 to provide a force point for the operator to rotate the valve stem 4.

[0031] A water inlet cover 9 is provided at one end of the valve body 1, and a water outlet cover 10 is provided at the other end. The water inlet cover 9 and the water outlet cover 10 are respectively provided at both ends of the valve body 1, and are used to connect the fluid pipeline so that the fluid can flow into and out of the ball valve. The design of the water inlet cover 9 and the water outlet cover 10 allows the ball valve to be easily connected to the fluid pipeline system, providing the necessary connection interface for the normal operation of the ball valve.

[0032] The inner wall of the valve body 1 is located at the outer wall of the two ends of the spherical valve core 6 and is provided with a rubber valve seat 13. The rubber valve seat 13 is provided on the outer wall of the inner wall of the valve body 1 at the two ends of the spherical valve core 6, and is used to provide a seal between the spherical valve core 6 and the valve body 1. The design of the rubber valve seat 13 has good elasticity and sealing performance, and can fit tightly on the outer wall of the spherical valve core 6 to prevent fluid leakage and improve the sealing reliability of the ball valve. A first magnet ring 14 is provided on one side of the rubber valve seat 13, and a second magnet ring 15 is provided on the inner wall of the valve body 1 on the side of the first magnet ring 14. The first magnet ring 14 and the second magnet ring 15 are in a state of repelling each other with the same charge. The first magnet ring 14 is provided on one side of the rubber valve seat 13, and the second magnet ring 15 is provided on the inner wall of the valve body 1 on the side of the first magnet ring 14. The first magnet ring 14 and the second magnet ring 15 are in a state of repelling each other with the same charge, and pressure is generated on the rubber valve seat 13 through repulsive force. The design of the first magnet ring 14 and the second magnet ring 15 utilizes magnetic force to enhance the fit between the rubber valve seat 13 and the spherical valve core 6, thereby improving the sealing performance of the ball valve. Even if the rubber valve seat 13 is damaged due to friction, the repulsive force of the magnet ring can still ensure that it fits tightly on the spherical valve core 6, thereby maintaining the sealing performance of the ball valve.

[0033] An upper flange 2 is provided on the top of the valve body 1, and threaded holes are provided at the four corners of the upper flange 2, wherein two threaded holes are provided with limit pins 3, and the two limit pins 3 are respectively located on both sides of the handle 5 for limiting the position of the handle 5. The limit pins 3 are screwed into the threaded holes after the handle 5 is rotated, and the two sides of the handle 5 are abutted to prevent the handle 5 from rotating closed due to vibration or the like after the ball valve is opened, or from rotating open due to vibration or the like after the ball valve is closed. After the handle 5 is rotated to the desired position (i.e., the ball valve is fully opened or fully closed), the limit pins 3 are screwed into the corresponding threaded holes. After the limit pins 3 are screwed in, their ends abut against the two sides of the handle 5, and the handle 5 is physically limited to prevent it from rotating accidentally due to vibration, external force or other reasons. The design of the limit pins 3 ensures that the ball valve can maintain a stable state after opening or closing, and avoids accidental rotation caused by vibration or the like. The operational safety and reliability of the ball valve are improved, and the failures and damages caused by improper operation or external factors are reduced.

[0034] The inner wall of the valve body 1 is provided with a lower sealing gasket 7 and an upper sealing gasket 8 on the outer wall of the valve stem 4, and a connecting bolt 11 is provided between the water inlet end cover 9 and the water outlet end cover 10. The valve stem 4 is connected to the top of the spherical valve core 6 and passes through the top opening of the valve body 1 to transmit the rotation force of the operator to control the opening and closing of the spherical valve core 6. Since the valve stem 4 moves up and down or rotates in the valve body 1, it is necessary to set a sealing device between the valve stem 4 and the inner wall of the valve body 1 to prevent fluid leakage. The lower sealing gasket 7 and the upper sealing gasket 8 are respectively arranged on the upper and lower sides of the outer wall of the valve stem 4 on the inner wall of the valve body 1. The lower sealing gasket 7 and the upper sealing gasket 8 are tightly fitted on the outer wall of the valve stem 4, providing a seal between the valve stem 4 and the valve body 1, and preventing the fluid from leaking from the gap between the valve stem 4 and the valve body 1. The design of the lower sealing gasket 7 and the upper sealing gasket 8 ensures the sealing between the valve stem 4 and the valve body 1 during the movement or rotation process, and improves the sealing reliability and service life of the ball valve. The water inlet end cover 9 and the water outlet end cover 10 are respectively arranged at the two ends of the valve body 1, and are used to connect the fluid pipeline so that the fluid can flow into and out of the ball valve.

[0035] Connection requirements: The water inlet cover 9 and the water outlet cover 10 need to be firmly connected to the valve body 1 to ensure the structural integrity and sealing of the ball valve. The connecting bolts 11 pass through the corresponding holes on the water inlet cover 9, the valve body 1 and the water outlet cover 10 to tightly connect the water inlet cover 9, the valve body 1 and the water outlet cover 10 together. The connecting bolts 11 firmly fix the water inlet cover 9, the valve body 1 and the water outlet cover 10 together by tightening the nuts to ensure the structural integrity and sealing of the ball valve.

[0036] An outer sealing ring 12 is provided at the connection between the water inlet end cover 9 and the valve body 1, and an outer sealing ring 12 is also provided at the connection between the water outlet end cover 10 and the valve body 1. The outer sealing ring 12 is respectively provided at the connection between the water inlet end cover 9 and the valve body 1 and at the connection between the water outlet end cover 10 and the valve body 1. The outer sealing ring 12 fits tightly on the contact surface between the water inlet end cover 9 (or the water outlet end cover 10) and the valve body 1, provides a seal between the end cover and the valve body 1, and prevents fluid leakage from the connection. The outer sealing ring 12 is usually made of a wear-resistant, corrosion-resistant, and highly elastic material to ensure its sealing performance and durability for long-term use. The design of the outer sealing ring 12 ensures the sealing between the water inlet end cover 9 and the water outlet end cover 10 and the valve body 1, and improves the sealing reliability and service life of the ball valve. The outer sealing ring 12 can effectively resist the erosion of fluid pressure, vibration and external environment, and maintain the long-term stable operation of the ball valve. The replacement and maintenance of the outer sealing ring 12 are relatively simple, which reduces the maintenance cost and difficulty of the ball valve.

[0037] In this embodiment, a through hole 16 is provided in the second magnet ring 15, and a second connecting valve 22 is provided at one side of the bottom of the valve body 1. When the fixed ball valve is used, compressed air is introduced into the valve body 1 through the second connecting valve 22, and the compressed air passes through the gap between the through hole 16 and the elastic rubber sleeve 18 to act on the first magnet ring 14, generating pressure on the rubber valve seat 13, so that it is sealed with the valve core; Example 3: Please refer to Figure 1-Figure 10 The present invention provides a technical solution: a fixed ball valve.

[0038] In this embodiment, other parts are the same as those in the first embodiment, and the difference from the first embodiment is that: a hollow fixing ring 17 is provided on the inner wall of the valve body 1 on one side of the second magnet ring 15, an elastic rubber sleeve 18 is provided on one side of the hollow fixing ring 17, a connecting pipe 23 is provided on one side of the hollow fixing ring 17, and a first connecting valve 21 is provided at one end of the connecting pipe 23. One end of the elastic rubber sleeve 18 passes through the through hole 16 and abuts against the first magnet ring 14, and the elastic rubber sleeve 18 is connected with the hollow fixing ring 17. Liquid with pressure is introduced into the first connecting valve 21, and the first connecting valve 21 is closed to maintain the pressure. The liquid enters the hollow fixing ring 17 through the connecting pipe 23, and finally the liquid with pressure enters the elastic rubber sleeve 18. At this time, the elastic rubber sleeve 18 will expand under the action of the liquid pressure, and generate pressure on the first magnet ring 14, so that the rubber valve seat 13 is always abutted and sealed with the spherical valve core 6; A valve stem connection hole 19 is provided at the top of the spherical valve core 6, and a valve core rotating shaft 20 is provided at the bottom of the spherical valve core 6. A valve stem connection hole 19 is provided at the top of the spherical valve core 6, which is used to connect with the valve stem 4, transmit the rotation force of the operator to control the opening and closing of the spherical valve core 6. A valve core rotating shaft 20 is provided at the bottom of the spherical valve core 6, which serves as a fulcrum for the rotation of the spherical valve core 6 in the valve body 1. There are eight through holes 16, and the eight through holes 16 are evenly arranged circumferentially on the second magnet ring 15. The tops of the first magnet ring 14, the second magnet ring 15 and the hollow fixing ring 17 are all in contact with the outer wall of the spherical valve body 6. There are eight through holes 16, which are evenly arranged circumferentially on the second magnet ring 15. The through holes 16 are channels for compressed air to flow, allowing compressed air to enter the interior of the valve body 1 from the second connecting valve 22, and pass through the gap between the elastic rubber sleeve 18, and finally act on the first magnet ring 14.

[0039] When the fixed ball valve is used, the repulsive force between the first magnet ring 14 and the second magnet ring 15 always generates pressure on the rubber valve seat 13. When the rubber valve seat 13 is damaged by friction due to the opening and closing of the ball valve, the repulsive force can still tightly abut the rubber valve seat 13 against the outer side of the spherical valve core 6 to achieve sealing between the valve core and the valve seat. In addition, when the fixed ball valve is used, liquid with pressure can be introduced into the first connecting valve 21, and the first connecting valve 21 is closed to maintain the pressure, and the liquid enters the hollow fixing ring 17 through the connecting pipe 23, and finally the liquid with pressure enters the elastic rubber sleeve 18. At this time, the elastic rubber sleeve 18 will expand under the action of the liquid pressure, and generate pressure on the first magnet ring 14, so that the rubber valve seat 13 is always in contact with the spherical valve core 6 for sealing; In addition, when the fixed ball valve is used, compressed air is introduced into the valve body 1 through the second connecting valve 22, and the compressed air passes through the gap between the through hole 16 and the elastic rubber sleeve 18 to act on the first magnet ring 14, generating pressure on the rubber valve seat 13, so that it is sealed with the valve core; By means of the above method, the rubber valve seat 13 can be in abutment and sealed with the valve seat for a long time, thereby improving the sealing performance between the rubber valve seat 13 and the valve core, thereby improving the sealing performance of the entire fixed ball valve.

[0040] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A fixed ball valve, comprising: A valve body (1), a valve stem (4) and a spherical valve core (6), characterized in that: a spherical valve core (6) is provided inside the valve body (1), a valve stem (4) is provided on the top of the spherical valve core (6), a handle (5) is provided on the top of the valve stem (4), a water inlet end cover (9) is provided at one end of the valve body (1), and a water outlet end cover (10) is provided at the other end, a rubber valve seat (13) is provided on the inner wall of the valve body (1) at both ends of the spherical valve core (6), a first magnet ring (14) is provided on one side of the rubber valve seat (13), and a second magnet ring (15) is provided on the inner wall of the valve body (1) at one side of the first magnet ring (14), and the first magnet ring (14) and the second magnet ring (15) are in a state of repelling each other with the same polarity.

2. A fixed ball valve according to claim 1, characterized in that: An upper flange (2) is provided on the top of the valve body (1), and threaded holes are provided at four corners of the upper flange (2), wherein two of the threaded holes are provided with limit pins (3), and the two limit pins (3) are respectively located on both sides of the handle (5) for limiting the position of the handle (5).

3. A fixed ball valve according to claim 1, characterized in that: The inner wall of the valve body (1) is provided with a lower sealing gasket (7) and an upper sealing gasket (8) on the outer wall of the valve stem (4), and a connecting bolt (11) is provided between the water inlet end cover (9) and the water outlet end cover (10).

4. A fixed ball valve according to claim 3, characterized in that: An outer sealing ring (12) is provided at the connection between the water inlet end cover (9) and the valve body (1), and an outer sealing ring (12) is also provided at the connection between the water outlet end cover (10) and the valve body (1).

5. A fixed ball valve according to claim 1, characterized in that: A through hole (16) is provided in the second magnet ring (15), and a second connecting valve (22) is provided on one side of the bottom of the valve body (1).

6. A fixed ball valve according to claim 5, characterized in that: A hollow fixing ring (17) is provided on the inner wall of the valve body (1) at one side of the second magnet ring (15), an elastic rubber sleeve (18) is provided on one side of the hollow fixing ring (17), a connecting pipe (23) is provided on one side of the hollow fixing ring (17), and a first connecting valve (21) is provided at one end of the connecting pipe (23).

7. A fixed ball valve according to claim 6, characterized in that: One end of the elastic rubber sleeve (18) passes through the through hole (16) and abuts against the first magnet ring (14), and the elastic rubber sleeve (18) is connected to the hollow fixing ring (17).

8. A fixed ball valve according to claim 1, characterized in that: The top of the spherical valve core (6) is provided with a valve stem connection hole (19), and the bottom of the spherical valve core (6) is provided with a valve core rotating shaft (20).

9. A fixed ball valve according to claim 6, characterized in that: There are eight through holes (16), and the eight through holes (16) are evenly arranged in the circumferential direction on the second magnet ring (15).

10. A fixed ball valve according to claim 9, characterized in that: The top ends of the first magnet ring (14), the second magnet ring (15) and the hollow fixing ring (17) are all in contact with the outer wall of the spherical valve body (6).

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