High-sealing-performance ball valve and machining process thereof

Abstract

The high-sealing-performance ball valve comprises a ball valve shell and a spherical valve body, the ball valve shell comprises a mounting ball shell and a connecting pipe coaxially communicating with the two opposite sides of the mounting ball shell, the spherical valve body is rotationally arranged in the mounting ball shell with the same ball center, a valve hole is formed in the spherical valve body, and the inner diameter shape of the valve hole corresponds to the shape of the connecting pipe; a rotating inner rod is rotationally arranged in the mounting spherical shell in the radius direction, one end of the rotating inner rod is connected with the spherical valve body, a sealing assembly is arranged in the ball valve shell and comprises a mounting sealing ring and a first sealing air bag ring, and the mounting sealing ring is arranged on the inner ring wall of the connecting position of the connecting pipe and the mounting spherical shell; the first sealing air bag ring is arranged on the side wall, close to the spherical valve body, of the installation sealing ring, and the first sealing air bag ring is attached to the surface of the spherical valve body. The sealing structure has the effects of improving the sealing performance of the ball valve and prolonging the service life of the ball valve.

Description

Technical Field

[0001] The present application relates to the technical field of ball valve processing, and in particular to a high-sealing ball valve and a processing technology thereof. Background Art

[0002] Valves are control components in fluid conveying systems with functions such as shutoff, regulation, flow diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. Valves used in fluid control systems can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. From the simplest shut-off valve to the various valves used in extremely complex automatic control systems, there are many varieties and specifications, such as shut-off valves, butterfly valves, flow valves, solenoid valves and ball valves. As a type of valve, ball valves are widely used in pipeline systems in industrial fields such as petroleum, chemical, electric power, and metallurgy.

[0003] According to the different ball valve structures and application occasions, ball valves can be divided into many types, such as floating ball valves, fixed ball valves, V-type ball valves, etc. Each type of ball valve has its unique application advantages and limitations. For example, floating ball valves are widely used in general industrial occasions due to their simple structure and good sealing performance; while fixed ball valves are more suitable for harsh working conditions because they can withstand higher pressures and temperatures. With the continuous development of industrial technology, higher and higher requirements are placed on the sealing performance, durability and reliability of ball valves. At present, the mainstream ball valve sealing technologies on the market mainly include soft seals and hard seals.

[0004] However, soft-sealed ball valves usually use soft materials to fit tightly with the ball to achieve the sealing of the fluid passage. This design has a good sealing effect in the early stage, but the sealing performance will gradually decrease due to wear and aging of the material during long-term use. Hard-sealed ball valves use metal-to-metal sealing. Although they are highly wear-resistant, they are still difficult to ensure long-term stable sealing effects in harsh environments such as high pressure, high temperature or strong corrosion. Summary of the invention

[0005] In order to improve the sealing performance of a ball valve and extend the service life of the ball valve, the present application provides a high-sealing ball valve.

[0006] The high sealing ball valve provided in this application adopts the following technical solution: A high-sealing ball valve comprises a ball valve shell and a spherical valve body, the ball valve shell comprises a mounting ball shell and a connecting pipe coaxially connected to opposite sides of the mounting ball shell, the spherical valve body is rotatably arranged in the mounting ball shell with the ball center, a valve hole is opened on the spherical valve body, the inner diameter shape of the valve hole is arranged corresponding to the shape of the connecting pipe, a rotating inner rod is rotatably arranged in the mounting ball shell along the radial direction, one end of the rotating inner rod is connected to the spherical valve body, and the other end extends out of the mounting ball shell, a sealing component is arranged in the ball valve shell, and a group of the sealing components are arranged at each connecting position between the connecting pipe and the mounting ball shell, the sealing component comprises a mounting sealing ring and a first sealing airbag ring, the mounting sealing ring is arranged on the inner ring wall at the connection between the connecting pipe and the mounting ball shell, the first sealing airbag ring is arranged on the side wall of the mounting sealing ring close to the spherical valve body, the first sealing airbag ring is arranged in contact with the surface of the spherical valve body, and an inflation component for inflating the first sealing airbag ring is arranged in the mounting ball shell.

[0007] By adopting the above technical solution, the hard installation sealing ring and the soft first sealing airbag ring are used together, and the wear resistance and sealing requirements of the ball valve are met at the same time. When the spherical valve body rotates until the valve hole and the connecting pipe are offset, gas is injected into the first sealing airbag ring through the inflation component to increase its volume, thereby improving the connection sealing between the spherical valve body and the installation spherical shell. Through the mutual cooperation of the ball valve shell, the spherical valve body, the sealing component and the inflation component, the sealing performance of the ball valve is improved and the service life of the ball valve is extended.

[0008] Optionally, the inflation component includes a drive sleeve, a transmission connecting rod, a mounting ring box, a guide rod, an extrusion ring plate and an extrusion airbag, the drive sleeve is slidably mounted on the rotating inner rod, the rotating inner rod is provided with a drive slider, the drive sleeve is provided with a drive spiral groove, the drive slider is slidably arranged in the drive spiral groove, the guide rod is arranged in the mounting ball shell and parallel to the rotating inner rod, the guide rod is slidably arranged with the drive sleeve, the transmission connecting rod is arranged on the drive sleeve and perpendicular to the rotating inner rod, the mounting ring box is arranged On the inner wall of the mounting ball shell, a transmission through groove is opened on the mounting ring box along the length direction of the rotating inner rod, the extrusion ring plate is slidably arranged in the mounting ring box, the extrusion airbag is arranged in the mounting ring box and connected to one side of the extrusion ring plate, one end of the transmission connecting rod extends into the mounting ring box through the transmission through groove and is connected to the extrusion ring plate, a first connecting pipe is arranged to connect the extrusion airbag and the first sealing airbag ring, and when the rotating inner rod is rotated until the valve hole is aligned with the connecting pipe, the extrusion ring plate is located at the top end of the inside of the mounting ring box.

[0009] By adopting the above technical solution, when the rotating inner rod rotates, the driving sleeve moves in the vertical direction under the driving of the driving slider and the guiding action of the guide rod. The extrusion ring plate slides in the mounting ring box under the driving action of the driving sleeve to squeeze the extrusion airbag and inflate the first sealing airbag ring through the first connecting pipe.

[0010] Optionally, mounting ring grooves are provided on two opposite outer walls of the spherical valve body, a second sealing airbag ring is arranged in the mounting ring groove, a second connecting pipe is provided between the second sealing airbag ring and the extrusion airbag, and when the spherical valve body is rotated until the valve hole and the connecting pipe are offset, the first sealing airbag ring and the second sealing airbag ring correspond in position.

[0011] By adopting the above technical solution, when the spherical valve body rotates to close the ball valve shell, the first sealing airbag ring and the second sealing airbag ring are positioned correspondingly and expand, further improving the sealing between the ball valve shell and the spherical valve body.

[0012] The cam is connected to the end of the camming wheel to move the first and second cams together, and the cam is connected to the end of the camming wheel by the second end of the camming wheel to move the first and second cams together.

[0013] By adopting the above technical solution, when it is necessary to rotate the rotating hand wheel, pull the sliding sleeve rod upward to separate the first positioning toothed disc from the second positioning toothed disc, thereby releasing the limit on the sliding sleeve rod. Rotate the rotating hand wheel. The sliding sleeve rod drives the rotating inner rod to rotate synchronously, and the setting of the linkage key and the linkage slide groove realizes the transmission of the sliding sleeve rod and the rotating inner rod. When the rotating inner rod is rotated to a suitable position, release the rotating hand wheel, and the second positioning toothed disc re-engages with the first positioning toothed disc under the action of the elastic member, thereby re-realizing the positioning of the rotating inner rod.

[0014] Optionally, the mounting sealing ring contains glass fiber material.

[0015] By adopting the above technical solution, the setting of the fiberglass material helps to improve the strength and wear resistance of the installation sealing ring, and helps to extend the service life of the sealing assembly.

[0016] Optionally, the installation sealing ring includes a straight tube portion that fits against the inner wall of the connecting pipe and a spherical portion that fits against the inner cavity of the installation spherical shell. An abutting sealing ring is provided on the outer ring wall at the connection between the straight tube portion and the spherical portion, and the abutting sealing ring fits against the inner wall of the outer shell of the spherical shell.

[0017] By adopting the above technical solution, the setting of the abutting sealing ring improves the connection sealing performance between the installation sealing ring and the outer shell of the ball valve.

[0018] Optionally, an installation rubber ball is provided on the side wall of the first sealing airbag ring close to the spherical portion. An installation spherical hole is provided on the side of the spherical portion close to the first sealing airbag ring, and the installation rubber ball is in interference fit with the installation spherical hole.

[0019] By adopting the above technical solution, the setting of the installation rubber ball and the installation spherical hole realizes the detachable connection between the installation sealing ring and the first sealing airbag ring, facilitating the operator to replace the aging first sealing airbag ring.

[0020] Optionally, the installation spherical shell includes two hemispherical connection shells. A connection ring groove is provided along the circumferential direction at the edge of one of the connection shells, and a first connection sealing ring is connected along the circumferential direction at the edge of the other connection shell. A second connection sealing ring is provided in the connection ring groove, and the first connection sealing ring is inserted into the connection ring groove and abuts against the second connection sealing ring.

[0021] By adopting the above technical solution, since the installation spherical shell is made of two hemispherical connection shells, it is convenient for the operator to repair and replace the internal structure of the installation spherical shell. The setting of the first connection sealing ring and the second connection sealing ring helps to improve the sealing performance of the installation spherical shell.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the mutual cooperation of the ball valve outer shell, the spherical valve body, the sealing assembly, and the inflation assembly, it has the effects of improving the sealing performance of the ball valve and extending the service life of the ball valve; 2. The setting of the positioning assembly realizes the positioning of the rotating inner rod, avoiding the rotation of the spherical valve body during use; 3. The setting of the installation rubber ball and the installation spherical hole realizes the detachable connection between the installation sealing ring and the first sealing airbag ring, facilitating the operator to replace the aging first sealing airbag ring. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of a high-sealing ball valve used in an embodiment of the present application.

[0024] Figure 2 It is a partial cross-sectional view showing the internal structure of the ball valve housing in an embodiment of the present application.

[0025] Figure 3 It is a schematic structural diagram of the inflation assembly in an embodiment of the present application.

[0026] Figure 4 It is Figure 2 an enlarged view of part A in

[0027] Figure 5 It is Figure 2 an enlarged view of part B in

[0028] Figure 6 It is Figure 3 an enlarged view of part C in

[0029] Explanation of reference numerals: 1. Ball valve housing; 101. Installation ball shell; 1011. Connection shell; 102. Connection pipe; 103. Connection flange ring plate; 104. Rotating connecting rod; 105. Rotating inner rod; 2. Spherical valve body; 21. Valve hole; 22. Installation ring groove; 3. Inflation assembly; 31. Driving sleeve; 311. Driving spiral groove; 32. Transmission connecting rod; 33. Installation ring box; 331. Transmission through groove; 34. Extrusion ring plate; 35. Extrusion airbag; 36. First communication pipe; 37. Second communication pipe; 38. Guide rod; 39. Guide plate; 4. Sealing assembly; 41. Installation sealing ring; 42. Abutting sealing ring; 43. First sealing airbag ring; 44. Second sealing airbag ring; 45. Installation rubber ball; 46. Installation spherical hole; 5. Positioning assembly; 51. Sliding sleeve rod; 511. Linkage sliding groove; 52. Rotating handwheel; 53. First positioning tooth disc; 54. Second positioning tooth disc; 55. Positioning spring; 56. Linkage key; 6. Driving slider; 7. First connection sealing ring; 8. Connection ring groove; 9. Second connection sealing ring. Detailed implementation manners

[0030] The following further describes the present application in detail with reference to the Figures 1-6 accompanying drawings. The embodiments of the present application provide a high-sealing ball valve and its processing technology, which have the effects of improving the sealing performance of the ball valve and extending the service life of the ball valve.

[0031] Referring to Figure 1 and Figure 2A high sealing ball valve comprises a ball valve housing 1, a spherical valve body 2, an inflating assembly 3, a sealing assembly 4 and a positioning assembly 5. The ball valve housing 1 comprises a spherical mounting ball shell 101 and connecting pipes 102 connected to opposite ends of the mounting ball shell 101. The two connecting pipes 102 are coaxially arranged, and a connecting flange ring plate 103 is arranged at one end of the two connecting pipes 102 that are away from each other. The spherical valve body 2 is spherical, and a valve hole 21 is opened on the spherical valve body 2 along the diameter direction. The spherical valve body 2 is rotatably arranged in the mounting ball shell 101, and the spherical valve body 2 and the mounting ball shell 101 are arranged to coincide with each other. The two opposite ends of the spherical valve body 2 are respectively provided with a rotating connecting rod 104 and a rotating inner rod 105 along the diameter direction thereof. The rotating connecting rod 104 and the rotating inner rod 105 are both rotatably arranged with the mounting spherical shell 101. One end of the rotating inner rod 105 extends out of the mounting spherical shell 101. The arrangement direction of the rotating connecting rod 104 and the rotating inner rod 105 is perpendicular to the central axis direction of the connecting pipe 102. When the spherical valve body 2 is rotated to a certain angle, the two ends of the valve hole 21 correspond to the two connecting pipes 102 one by one and are connected.

[0032] Reference Figures 2-4 A group of sealing components 4 are provided at the positions where the mounting ball shell 101 is connected with the two connecting pipes 102. The sealing components 4 include a mounting sealing ring 41, an abutting sealing ring 42, a first sealing airbag ring 43, a second sealing airbag ring 44 and a mounting rubber ball 45. The mounting sealing ring 41 is provided at the connection between the connecting pipe 102 and the mounting ball shell 101. The mounting sealing ring 41 includes a straight tube part and a spherical part which are connected and arranged. The straight tube part is arranged in contact with the inner ring wall of the connecting pipe 102, and the spherical part is arranged in contact with the inner ring wall of the mounting ball shell 101. An abutting sealing ring 42 is provided at the connection between the straight tube part and the spherical part on one side close to the inner wall of the ball valve housing 1 along the circumferential direction. The abutting sealing ring 42 is arranged in contact with the inner wall of the ball valve housing 1. The mounting sealing ring 41 contains glass fiber material.

[0033] Reference Figure 3 and Figure 4 , the first sealing airbag ring 43 is arranged on the side of the spherical part close to the spherical valve body 2, and the first sealing airbag ring 43 is arranged in close contact with the outer wall of the spherical valve body 2. A plurality of mounting spherical holes 46 are provided on the side of the spherical part close to the first sealing airbag ring 43, and a plurality of mounting rubber balls 45 are arranged along the circumferential direction on the side of the first sealing airbag ring 43 close to the spherical part, and the plurality of mounting rubber balls 45 correspond to the plurality of mounting spherical holes 46 one by one and have interference fit. A mounting ring groove 22 is provided on the opposite outer walls of the spherical valve body 2, and a second sealing airbag ring 44 is arranged in each mounting ring groove 22. When the spherical valve body 2 rotates until the valve hole 21 and the connecting pipe 102 are offset, the two second sealing airbag rings 44 correspond to the two first sealing airbag rings 43 one by one and are arranged in close contact.

[0034] Reference Figure 2 , Figure 5 and Figure 6 , the inflation assembly 3 is arranged in the mounting spherical shell 101. The inflation assembly 3 includes a driving sleeve 31, a transmission connecting rod 32, a mounting ring box 33, a pressing ring plate 34, a pressing airbag 35, a first connecting pipe 36, a second connecting pipe 37, a guide rod 38 and a guide plate 39. The driving sleeve 31 is slidably sleeved on the rod section of the rotating inner rod 105 inside the mounting spherical shell 101, and a driving spiral groove 311 is spirally formed on the driving sleeve 31. A driving slider 6 is arranged on the rotating inner rod 105, and the driving slider 6 is slidably arranged in the driving spiral groove 311. The mounting ring box 33 is coaxially sleeved outside the rotating inner rod 105 and connected to the inner wall of the mounting spherical shell 101, and the pressing ring plate 34 is slidably arranged in the mounting ring box 33. The pressing airbag 35 is annular, and the pressing airbag 35 is arranged in the mounting ring box 33 and connected to the side of the pressing ring plate 34 away from the mounting spherical shell 101. A transmission through groove 331 is formed on the inner ring wall of the mounting ring box 33 along the length direction of the rotating inner rod 105. One end of the transmission connecting rod 32 is connected to the driving sleeve 31, and the other end extends into the mounting ring box 33 through the transmission through groove 331 and is connected to the pressing ring plate 34. When the spherical valve body 2 rotates to the valve hole 21 being communicated with the connecting pipe 102, the pressing ring plate 34 moves to the side of the mounting ring box 33 close to the inner wall of the mounting spherical shell 101.

[0035] Reference Figures 3-5 , two first connecting pipes 36 and two second connecting pipes 37 are both connected to the pressing airbag 35 in a communicating manner. The two first connecting pipes 36 are correspondingly and communicatively connected to the two first sealing airbag rings 43 one by one, and the two second connecting pipes 37 are correspondingly and communicatively connected to the two second sealing airbag rings 44 one by one. One end of the guide rod 38 is connected to the inner wall of the mounting spherical shell 101, and the guide rod 38 is arranged parallel to the rotating inner rod 105. The guide plate 39 is connected to the outer ring wall of the driving sleeve 31, and the guide rod 38 penetrates through the guide plate 39 and is slidably connected to it.

[0036] Reference Figure 5 and Figure 6, the positioning component 5 is arranged on the installation spherical shell 101. The positioning component 5 includes a sliding sleeve rod 51, a rotating handwheel 52, a first positioning tooth disc 53, a second positioning tooth disc 54 and a positioning spring 55. The sliding sleeve rod 51 is slidably sleeved on the rotating rod outside the installation spherical shell 101, and the rotating handwheel 52 is connected to the end of the sliding sleeve rod 51 away from the installation spherical shell 101. The first positioning tooth disc 53 is connected to the outer wall of the installation spherical shell 101, and the first positioning tooth disc 53 is coaxially arranged with respect to the rotating inner rod 105. The second positioning tooth disc 54 is connected to the end away from the rotating handwheel 52. Corresponding positioning teeth are arranged on the sides of the second positioning tooth disc 54 and the first positioning tooth disc 53 close to each other. The positioning spring 55 is arranged in the sliding sleeve rod 51. One end of the positioning spring 55 is connected to the rotating handwheel 52, and the other end is connected to the end of the rotating inner rod 105. In the natural state, the second positioning tooth disc 54 is meshed and connected with the first positioning tooth disc 53 under the action of the positioning spring 55. A linkage chute 511 is formed in the sliding sleeve rod 51 along the vertical direction. The linkage key 56 is connected to the rotating inner rod 105, and the linkage key 56 is slidably arranged in the linkage chute 511.

[0037] Refer to Figure 5 , the installation spherical shell 101 includes two semi-spherical connecting shells 1011, and the two connecting shells 1011 are correspondingly and communicatively connected to the two connecting pipes 102. A first connecting sealing ring 7 is circumferentially connected to the edge of one of the connecting shells 1011, and a connecting ring groove 8 is formed in the edge of the other connecting shell 1011 along the circumference. A second connecting sealing ring 9 is arranged in the connecting ring groove 8. When the two connecting shells 1011 are spliced together to form a complete installation spherical shell 101, the first connecting sealing ring 7 is embedded in the connecting ring groove 8 and abutted against the first connecting sealing ring 7.

[0038] Refer to Figure 4 , the hard installation sealing ring 41 and the soft first sealing airbag ring 43 are used in combination. On the one hand, the installation sealing ring 41 containing glass fiber material meets the requirement of the wear resistance of the gasket and helps to extend the service life of the device; on the other hand, the elastic first sealing airbag ring 43 fills the gap between the installation sealing ring 41 and the spherical valve body 2, meeting the requirement of the sealing performance of the ball valve. The setting of the abutting sealing ring 42 improves the connection sealing performance between the installation sealing ring 41 and the ball valve housing 1.

[0039] Refer to Figure 6 and Figure 5When the ball valve needs to be closed, the rotating hand wheel 52 is pulled in a direction away from the mounting ball shell 101, and the linkage key 56 slides in the linkage slide groove 511. The first positioning toothed disc 53 separates from the second positioning toothed disc 54, releasing the angle lock of the rotating hand wheel 52, and the positioning spring 55 stretches to accumulate elastic potential energy. The rotating hand wheel 52 is turned, and the rotating inner rod 105 rotates synchronously driven by the linkage key 56 and the linkage slide groove 511, and the rotating inner rod 105 drives the spherical valve body 2 to rotate.

[0040] Reference Figure 2 , Figure 5 and Figure 6 In the process of rotating the inner rod 105, the driving slider 6 slides in the driving spiral groove 311 of the driving sleeve 31. The driving sleeve 31 slides in the direction close to the spherical valve body 2 under the driving of the driving slider 6 and the guiding action of the guide rod 38. The transmission connecting rod 32 moves with the driving sleeve 31, and the transmission connecting rod 32 drives the extrusion ring plate 34 to move synchronously and squeeze the extrusion airbag 35. The gas in the extrusion airbag 35 is squeezed into the first sealing airbag ring 43 and the second sealing airbag ring 44 through the first connecting pipe 36 and the second connecting pipe 37 to expand. When the spherical valve body 2 rotates to the position where the valve hole 21 and the connecting pipe 102 are staggered, the expanded first sealing airbag ring 43 and the second sealing airbag ring 44 are tightly fitted, which helps to improve the sealing performance of the ball valve.

[0041] Reference Figure 5 When the spherical valve body 2 is rotated to a suitable angle, the rotating hand wheel 52 is released, and the sliding sleeve rod 51 slides toward the direction close to the mounting ball shell 101 under the action of the positioning spring 55. The first positioning toothed disc 53 is meshed with the second positioning toothed disc 54, thereby limiting the angle of the rotating hand wheel 52 and the sliding sleeve rod 51, avoiding the rotating hand wheel 52 and the spherical valve body 2 from rotating under the scouring of water flow, and improving the structural stability of the device.

[0042] Reference Figure 2 , Figure 5 and Figure 6 , turn the rotating hand wheel 52 in the opposite direction, when the spherical valve body 2 is rotated to the point where the valve hole 21 is connected to the connecting pipe 102, the extrusion ring plate 34 moves in the direction away from the mounting spherical shell 101 under the action of the driving sleeve 31, the volume of the extrusion airbag 35 increases, and the volume of the first sealing airbag ring 43 and the second sealing airbag ring 44 decreases, which facilitates the rotation of the spherical valve body 2 in the mounting spherical shell 101. Since the mounting spherical shell 101 is made of two hemispherical connecting shells 1011, it is convenient for operators to replace and repair the internal structure. The setting of the mounting spherical hole 46 and the mounting rubber ball 45 realizes the detachable connection between the first sealing airbag ring 43 and the mounting sealing ring 41, which facilitates operators to replace the aged first sealing airbag ring 43.

[0043] In the embodiment of the present application, the implementation principle of a high-sealing ball valve is as follows: The hard installation sealing ring 41 and the soft first sealing airbag ring 43 are used in combination. On the one hand, the installation sealing ring 41 containing glass fiber material meets the requirement of the wear resistance of the gasket and helps to extend the service life of the device; on the other hand, the elastic first sealing airbag fills the gap between the installation sealing ring 41 and the spherical valve body 2, meeting the requirement of the sealing performance of the ball valve.

[0044] When it is necessary to close the ball valve, rotate the rotating handwheel 52, and the transmission connecting rod 32 drives the extrusion ring plate 34 to move synchronously and extrude the extrusion airbag 35. The gas in the extrusion airbag 35 is squeezed into the first sealing airbag ring 43 and the second sealing airbag ring 44 through the first connecting pipe 36 and the second connecting pipe 37 to make them expand. The expanded first sealing airbag ring 43 and the second sealing airbag ring 44 are closely attached to each other, which helps to improve the sealing performance of the ball valve.

[0045] The above are all the preferred embodiments of the present application. Without restricting the protection scope of the present application based on this, therefore: All equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A high-sealing ball valve, comprising a ball valve housing (1) and a spherical valve body (2), wherein the ball valve housing (1) comprises a mounting spherical shell (101) and connecting pipes (102) coaxially connected to opposite sides of the mounting spherical shell (101), wherein the spherical valve body (2) is rotatably arranged in the mounting spherical shell (101) coaxially with the center of the ball, wherein a valve hole (21) is provided on the spherical valve body (2), wherein the inner diameter of the valve hole (21) is arranged corresponding to the shape of the connecting pipe (102), wherein a rotating inner rod (105) is rotatably arranged in the mounting spherical shell (101) along a radial direction, wherein one end of the rotating inner rod (105) is connected to the spherical valve body (2), and the other end thereof protrudes out of the mounting spherical shell (101), wherein the rotating inner rod (105) is characterized in that: A sealing assembly (4) is provided in the ball valve housing (1), and a group of the sealing assembly (4) is provided at each communication position between the connecting tube (102) and the mounting ball shell (101). The sealing assembly (4) comprises a mounting sealing ring (41) and a first sealing airbag ring (43). The mounting sealing ring (41) is provided on the inner ring wall at the connection between the connecting tube (102) and the mounting ball shell (101), and the first sealing airbag ring (43) is provided on the side wall of the mounting sealing ring (41) close to the ball valve body (2). The first sealing airbag ring (43) is arranged in contact with the surface of the ball valve body (2), and an inflation assembly (3) for inflating the first sealing airbag ring (43) is provided in the mounting ball shell (101).

2. A high sealing ball valve according to claim 1, characterized in that: The inflation assembly (3) comprises a drive sleeve (31), a transmission connecting rod (32), a mounting ring box (33), a guide rod (38), an extrusion ring plate (34) and an extrusion airbag (35); the drive sleeve (31) is slidably mounted on the rotating inner rod (105); a drive slider (6) is arranged on the rotating inner rod (105); a drive spiral groove (311) is provided on the drive sleeve (31); the drive slider (6) is slidably mounted in the drive spiral groove (311); the guide rod (38) is arranged in the mounting ball shell (101) and is parallel to the rotating inner rod (105); the guide rod (38) and the drive sleeve (31) are slidably mounted; the transmission connecting rod (32) is arranged on the drive sleeve (31) and is perpendicular to the rotating inner rod (105); the mounting ring box (33) is arranged on the drive sleeve (31) and is perpendicular to the rotating inner rod (105); the ) is arranged on the inner wall of the mounting ball shell (101), a transmission groove (331) is opened on the mounting ring box (33) along the length direction of the rotating inner rod (105), the extrusion ring plate (34) is slidably arranged in the mounting ring box (33), the extrusion airbag (35) is arranged in the mounting ring box (33) and connected to one side of the extrusion ring plate (34), one end of the transmission connecting rod (32) extends into the mounting ring box (33) through the transmission groove (331) and is connected to the extrusion ring plate (34), a first connecting pipe (36) is arranged to connect the extrusion airbag (35) and the first sealing airbag ring (43), and when the rotating inner rod (105) rotates until the valve hole (21) is aligned with the connecting pipe (102), the extrusion ring plate (34) is located at the top end of the mounting ring box (33).

3. A high sealing ball valve according to claim 2, characterized in that: The two opposite outer walls of the spherical valve body (2) are provided with mounting annular grooves (22), a second sealing airbag ring (44) is arranged in the mounting annular groove (22), a second connecting pipe (37) is arranged between the second sealing airbag ring (44) and the extrusion airbag (35), and when the spherical valve body (2) is rotated until the valve hole (21) and the connecting pipe (102) are offset, the first sealing airbag ring (43) and the second sealing airbag ring (44) correspond in position.

4. A high sealing ball valve according to claim 1, characterized in that: The mounting ball shell (101) is provided with a positioning assembly (5), the positioning assembly (5) comprising a sliding sleeve rod (51), a rotating hand wheel (52), a linkage key (56), a first positioning toothed disc (53) and a second positioning toothed disc (54); the sliding sleeve rod (51) is slidably sleeved on a rod section of the rotating inner rod (105) extending out of the mounting ball shell (101); the rotating hand wheel (52) is connected to an end of the sliding sleeve rod (51) away from the mounting ball shell (101); the first positioning toothed disc (53) is connected to an outer wall of the mounting ball shell (101) and sleeved on the outside of the rotating inner rod (105); an end of the sliding sleeve rod (51) away from the rotating hand wheel (52) is in contact with the rotating inner rod (105); The first positioning toothed disc (53) and the second positioning toothed disc (54) are connected, and positioning teeth of corresponding shapes are arranged on the sides of the first positioning toothed disc (53) and the second positioning toothed disc (54) that are close to each other. The linkage key (56) is connected to the rotating inner rod (105). A linkage sliding groove (511) is provided on the sliding sleeve rod (51) along its length direction. The linkage key (56) is slidably arranged in the linkage sliding groove (511). An elastic member is arranged in the sliding sleeve rod (51), and the two ends of the elastic member are respectively connected to the rotating hand wheel (52) and the rotating inner rod (105). In a natural state, the first positioning toothed disc (53) is meshed and connected with the second positioning toothed disc (54) under the action of the elastic member.

5. A high sealing ball valve according to claim 1, characterized in that: The installation sealing ring (41) contains glass fiber material.

6. A high sealing ball valve according to claim 1, characterized in that: The installation sealing ring (41) comprises a straight tube portion fitted with the inner wall of the connecting tube (102) and a spherical portion fitted with the inner cavity of the installation ball shell (101), and an abutting sealing ring (42) is provided on the outer ring wall at the connection between the straight tube portion and the spherical portion, and the abutting sealing ring (42) is fitted with the inner wall of the ball valve housing (1).

7. A high sealing ball valve according to claim 6, characterized in that: A mounting rubber ball (45) is arranged on the side wall of the first sealing airbag ring (43) close to the spherical part, and a mounting spherical hole (46) is opened on one side of the spherical part close to the first sealing airbag ring (43), and the mounting rubber ball (45) is interference fit with the mounting spherical hole (46).

8. A high sealing ball valve according to claim 7, characterized in that: The mounting spherical shell (101) comprises two hemispherical connecting shells (1011), wherein the edge of one of the connecting shells (1011) is provided with a connecting ring groove (8) along its circumference, and the edge of the other connecting shell (1011) is connected with a first connecting sealing ring (7) along its circumference, and a second connecting sealing ring (9) is arranged in the connecting ring groove (8), and the first connecting sealing ring (7) is inserted in the connecting ring groove (8) and tightly pressed against the second connecting sealing ring (9).

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