Ball valve

Abstract

The utility model relates to the technical field of ball valves, in particular to a ball valve. The ball valve comprises a first valve body, a second valve body, a valve rod, a valve ball, a first bearing and a second bearing, the first valve body is provided with a containing cavity, the valve ball is contained in the containing cavity, and the second valve body is connected with the first valve body. The first valve body is further provided with a first valve port and a mounting hole, the second valve body is provided with a second valve port, one end of the valve rod extends into the mounting hole and is in limiting connection with the valve ball, and the valve rod can drive the valve ball to rotate so as to connect or disconnect the first valve port and the second valve port. The first bearing is arranged in the containing cavity and located on the side, away from the valve rod, of the valve ball, the valve rod is sleeved with the second bearing, the valve ball is rotationally connected to the first valve body through the first bearing, and the valve rod is rotationally connected to the first valve body through the second bearing. According to the ball valve provided by the invention, the problems of low assembling efficiency and high valve opening difficulty of a ball valve in the related technology are solved.

Description

Technical Field

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

[0002] Ball valves are commonly used in refrigeration systems. The valve stem drives the valve ball inside the valve body to rotate around the axis, thereby achieving the conduction or cutoff of the fluid. However, when the fluid is cut off, that is, when the ball valve is in the closed state, the refrigerant on one side of the valve ball will exert a greater pressure on the valve ball. The valve ball will deflect under the lateral pressure and be tightly pressed against the valve body or other internal parts, which increases the friction resistance that needs to be overcome when the ball valve is opened, thereby greatly increasing the difficulty of opening the ball valve.

[0003] At the same time, the assembly of the various components of the ball valve structure in the related art is also relatively complicated, which increases the difficulty of assembling the entire ball valve, thereby reducing the assembly efficiency of the ball valve and increasing the cost of the ball valve. Utility Model Content

[0004] Based on this, it is necessary to provide a ball valve to solve the problems of low assembly efficiency and great difficulty in opening the ball valve in the related art.

[0005] The present application provides a ball valve, comprising a first valve body, a second valve body, a valve stem, a valve ball, a first bearing and a second bearing, wherein the first valve body is provided with an accommodating cavity, the valve ball is accommodated in the accommodating cavity, and the second valve body is connected to the first valve body; the first valve body is also provided with a first valve port and a mounting hole connected to the accommodating cavity, the second valve body is provided with a second valve port connected to the accommodating cavity, one end of the valve stem extends into the mounting hole and is limit-connected with the valve ball, and the valve stem can drive the valve ball to rotate so as to connect or disconnect the first valve port and the second valve port; the first bearing is arranged in the accommodating cavity and is located on the side of the valve ball away from the valve stem, and the second bearing is sleeved on the outer periphery of the valve stem, wherein the valve ball is rotatably connected to the first valve body via the first bearing, and the valve stem is rotatably connected to the first valve body via the second bearing.

[0006] In one embodiment, the inner wall of the accommodating cavity is recessed in a direction away from the valve stem to form a first mounting groove, and the first bearing is installed in the first mounting groove; wherein the outer ring of the first bearing cooperates with the side wall of the first mounting groove, the inner ring of the first bearing is connected to a first positioning column, and the first positioning column is connected to the valve ball.

[0007] In one embodiment, the valve ball is provided with a first positioning hole, and the first positioning column is inserted into and connected to the first positioning hole.

[0008] In one embodiment, the side wall of the valve stem is formed with a first step portion, the inner wall of the mounting hole is formed with a second step portion, the first step portion and the second step portion are arranged flush and form a second mounting groove, and the second bearing is installed in the second mounting groove.

[0009] In one of the embodiments, the ball valve further comprises a sealing cover, which is sleeved on the outer circumference of the valve stem and connected to the first valve body; wherein one end of the sealing cover close to the valve ball stops at the second bearing.

[0010] In one embodiment, the ball valve further includes a gasket, which is disposed between the sealing cover and the second bearing and abuts against the sealing cover and the second bearing respectively.

[0011] In one embodiment, the valve stem at least partially extends out of an end of the sealing cover away from the valve ball.

[0012] In one embodiment, the first bearing and the second bearing are coaxially arranged.

[0013] In one embodiment, a limiting groove is provided at one end of the valve ball close to the valve stem, and a limiting portion is provided at one end of the valve stem. The limiting portion is inserted into the limiting groove and cooperates with the groove wall of the limiting groove along the circumferential direction of the valve ball to prevent rotation.

[0014] In one embodiment, the bottom wall of the limiting groove is recessed in a direction away from the valve stem to form a second positioning hole, and one end of the limiting portion close to the valve ball protrudes to form a second positioning column, which is inserted into and connected to the second positioning hole.

[0015] In one embodiment, the ball valve further includes a first sealing member and a second sealing member, wherein the first sealing member is disposed between the valve ball and the first valve body, and the second sealing member is disposed between the valve ball and the second valve body.

[0016] In one embodiment, the first valve body and the second valve body are threadedly matched.

[0017] Compared with the related art, when assembling the ball valve provided by the present application, the valve ball can be first placed in the accommodating cavity of the first valve body through the accommodating opening to achieve pre-installation of the valve ball, and then the connection between the second valve body and the first valve body can be used to limit the position of the valve ball in the accommodating cavity. The overall installation is simple and can greatly improve the assembly efficiency. At the same time, the valve ball can rotate under the drive of the valve stem, thereby achieving the conduction or cutoff of the fluid. By arranging the first bearing and the second bearing on both sides of the valve ball, when the ball valve is in the closed state, the position of the valve ball relative to the first valve body and the second valve body under the fluid pressure can still be consistent with the initial assembly position, reducing the friction resistance of the contact between the valve ball and other components, thereby greatly reducing the torque required to open the valve and reducing the cost of opening the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A cross-sectional view of a ball valve in a closed state according to one or more embodiments of the present application;

[0020] Figure 2 A cross-sectional view of a ball valve in an open state according to one or more embodiments provided in the present application.

[0021] The symbols in the figure mean the following:

[0022] 100, ball valve; 10, first valve body; 101, accommodating cavity; 102, accommodating opening; 103, first valve port; 104, mounting hole; 105, first mounting groove; 11, second step portion; 12, first sealing member; 20, second valve body; 201, second valve port; 21, second sealing member; 30, valve stem; 301, second mounting groove; 302, sealing groove; 31, first step portion; 32, limiting portion; 33, second positioning column; 34, third sealing member; 40, valve ball; 401, first positioning hole; 402, limiting groove; 403, second positioning hole; 50, first bearing; 51, first positioning column; 60, second bearing; 70, cover; 80, gasket. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0024] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0028] Ball valves are commonly used in refrigeration systems. The valve stem drives the valve ball inside the valve body to rotate around the axis, thereby achieving the conduction or cutoff of the fluid. However, when the fluid is cut off, that is, when the ball valve is in the closed state, the refrigerant on one side of the valve ball will exert a greater pressure on the valve ball. The valve ball will deflect under the lateral pressure and be tightly pressed against the valve body or other internal parts, which increases the friction resistance that needs to be overcome when the ball valve is opened, thereby greatly increasing the difficulty of opening the ball valve.

[0029] At the same time, the assembly of the various components of the ball valve structure in the related art is also relatively complicated, which increases the difficulty of assembling the entire ball valve, thereby reducing the assembly efficiency of the ball valve and increasing the cost of the ball valve.

[0030] See also Figure 1 and Figure 2 In order to solve the problems of low assembly efficiency and great difficulty in opening the ball valve in the related art, the present application provides a ball valve 100, which includes a first valve body 10, a second valve body 20, a valve stem 30, a valve ball 40, a first bearing 50 and a second bearing 60. The first valve body 10 is provided with a receiving cavity 101 and a receiving opening 102 communicating with the receiving cavity 101. The valve ball 40 is received in the receiving cavity 101 through the receiving opening 102. The second valve body 20 is arranged at the receiving opening 102 and connected to the first valve body 10 to stop the valve ball 40. The first valve body 10 is also provided with a first valve port 103 and a mounting hole 104 communicating with the receiving cavity 101. The second valve body 20 is provided with a second valve port 201 communicating with the receiving cavity 101. One end of the valve stem 30 extends into the mounting hole 104 and is limitedly connected with the valve ball 40. The valve stem 30 can drive the valve ball 40 to rotate to connect or disconnect the first valve port 103 and the second valve port 201. The first bearing 50 is disposed in the accommodating cavity 101 and is located on the side of the valve ball 40 away from the valve stem 30, and the second bearing 60 is sleeved on the outer periphery of the valve stem 30, wherein the valve ball 40 is rotatably connected to the first valve body 10 through the first bearing 50, and the valve stem 30 is rotatably connected to the first valve body 10 through the second bearing 60.

[0031] It is understandable that when assembling the ball valve 100 of the present application, the valve ball 40 can be placed in the accommodating cavity 101 of the first valve body 10 through the accommodating opening 102 to achieve pre-installation of the valve ball 40, and then the connection between the second valve body 20 and the first valve body 10 is used to limit the valve ball 40 in the accommodating cavity 101. The overall installation is simple and can greatly improve the assembly efficiency. At the same time, the valve ball 40 can rotate under the drive of the valve stem 30, thereby achieving the conduction or cutoff of the fluid. By arranging the first bearing 50 and the second bearing 60 on both sides of the valve ball 40, when the ball valve 100 is in the closed state, the position of the valve ball 40 relative to the first valve body 10 and the second valve body 20 under the fluid pressure can still be consistent with the initial assembly position, reducing the friction resistance of the valve ball 40 in contact with other components, thereby greatly reducing the torque required for opening the valve and reducing the cost of opening the valve.

[0032] In one embodiment, the first valve body 10 and the second valve body 20 are threaded, so that the connection between the first valve body 10 and the second valve body 20 is simple, which can further improve the assembly efficiency. In order to further improve the connection reliability of the first valve body 10 and the second valve body 20, the first valve body 10 and the second valve body 20 can be further fixed by welding, etc., and the sealing of the connection between the first valve body 10 and the second valve body 20 is also improved, avoiding the risk of refrigerant leakage inside the ball valve 100.

[0033] In one embodiment, the ball valve 100 further includes a first sealing member 12 and a second sealing member 21 . The first sealing member 12 is disposed between the valve ball 40 and the first valve body 10 , and the second sealing member 21 is disposed between the valve ball 40 and the second valve body 20 .

[0034] That is, the ball valve 100 of the present application, when the ball valve 100 is in the valve-off state, realizes the sealing connection between the valve ball 40 and the first valve body 10 and the second valve body 20 by adopting the arrangement of the first sealing member 12 and the second sealing member 21, thereby improving the sealing performance of the valve ball 40 in the process of controlling the flow of the fluid, and ensuring the sealing performance of the ball valve 100 in the valve-off state. Among them, since the first bearing 50 and the second bearing 60 reduce the deviation of the axis of the valve ball 40 or the local inclination of the valve ball 40, the ball valve 100 is always in an ideal vertical installation position, so the pressure value applied by the valve ball 40 to the first sealing member 12 or the second sealing member 21 changes less, and the valve ball 40 will not cause excessive extrusion of any of the first sealing member 12 or the second sealing member 21 due to deflection, thereby reducing the wear of the first sealing member 12 or the second sealing member 21, greatly reducing the decline in the sealing performance of the first sealing member 12 and the second sealing member 21 due to wear, and extending the service life.

[0035] Specifically, the first sealing member 12 and the second sealing member 21 are preferably configured as annular sealing gaskets, and the first sealing member 12 is disposed at the first valve port 103 , and the second sealing member 21 is disposed at the second valve port 201 .

[0036] Furthermore, in one embodiment, the first bearing 50 and the second bearing 60 are coaxially arranged to further improve the coaxiality of the valve ball 40 and the valve stem 30 , thereby reducing the probability of the axis of the valve ball 40 being offset due to force on the valve ball 40 .

[0037] In one embodiment, if Figure 1 and Figure 2 As shown, the inner wall of the accommodating cavity 101 is recessed in a direction away from the valve stem 30 to form a first installation groove 105, and the first bearing 50 is installed in the first installation groove 105. The outer ring of the first bearing 50 abuts against the side wall of the first installation groove 105, so that the first bearing 50 is installed in a limited position in the accommodating cavity 101, thereby improving the stability and reliability of the installation of the first bearing 50.

[0038] Furthermore, the inner ring of the first bearing 50 is connected with a first positioning column 51, and the first positioning column 51 is connected to the valve ball 40. Specifically, in this embodiment, the valve ball 40 is provided with a first positioning hole 401, and the first positioning column 51 is inserted and connected to the first positioning hole 401. Through the connection between the first positioning column 51 and the valve ball 40, the deviation of the axis of the valve ball 40 can be further reduced, and the difficulty of opening the valve can be reduced.

[0039] Among them, the first positioning column 51 and the inner ring of the first bearing 50 can be fixedly connected by interference fit or welding, and the first positioning column 51 and the first positioning hole 401 can be set to a polygon or circle with the same shape, and adopt a detachable connection. Of course, fixed connection can also be achieved by welding or interference fit, or the first positioning column 51 and the valve ball 40 can be set as an integrated structure to further improve the structural strength.

[0040] However, the present invention is not limited thereto. In other embodiments, the first mounting groove 105 may be provided on the valve ball 40 , and the first positioning column 51 may be connected to the inner wall of the accommodating cavity 101 , as long as the same effect can be achieved.

[0041] In one embodiment, if Figure 1 As shown, the side wall of the valve stem 30 is formed with a first step portion 31, the inner wall of the mounting hole 104 is formed with a second step portion 11, the first step portion 31 and the second step portion 11 are arranged flush and form a second mounting groove 301, and the second bearing 60 is installed in the second mounting groove 301. In this way, the installation of the second bearing 60 is facilitated, and the probability of the second bearing 60 moving along the axial direction can be reduced, thereby improving the stability of the installation of the second bearing 60.

[0042] The inner ring of the second bearing 60 is fixedly connected to the side wall of the valve stem 30 , and the outer ring of the second bearing 60 is fixedly abutted against the inner wall of the mounting hole 104 . In addition, the axial thickness of the second bearing 60 is preferably equal to the depth of the second mounting groove 301 .

[0043] In order to limit the side of the second bearing 60 away from the valve ball 40 and further improve the stability of the installation of the second bearing 60, in one embodiment, as shown in FIG. Figure 1 As shown, the ball valve 100 further includes a cover 70, which is sleeved on the outer periphery of the valve stem 30 and connected to the first valve body 10, and one end of the cover 70 close to the valve ball 40 stops at the second bearing 60. By providing the cover 70 to stop the second bearing 60, the second bearing 60 can be prevented from being separated from the second mounting groove 301, which has higher safety.

[0044] The valve stem 30 at least partially extends out of the end of the cover 70 away from the valve ball 40, that is, the length of the valve stem 30 is correspondingly extended in the present application. In other words, the technical solution of this embodiment adopts a valve stem 30 that is longer than before, for example, see Figure 1 As shown, the valve stem 30 is in a vertical state. When the cover 70 is welded and fixed to the first valve body 10, the welding position is at the lower end of the valve stem 30. The heat of the welding process is mainly concentrated on the lower part of the valve stem 30. Since a longer valve stem 30 is used, the sealing component (such as the third sealing component 34 described below) located at the upper end of the valve stem 30 will not be affected by the high temperature of welding. In this way, it is helpful to reduce the thermal impact on other internal components during the welding of the first valve body 10, the second valve body 20 and other structures, such as some non-metallic sealing components, which may change their performance or physical structure due to heat, that is, avoid damage to components, thereby improving the molding rate of the ball valve 100.

[0045] Further, in one embodiment, if Figure 1 As shown, the ball valve 100 further includes a gasket 80, which is disposed between the cover 70 and the second bearing 60 and respectively abuts against the cover 70 and the second bearing 60. Thus, by providing the gasket 80, the cover 70 and the second bearing 60 can be protected. Specifically, the gasket 80 can prevent the cover 70 from crushing the second bearing 60 during installation, and can also reduce the greater wear of the cover 70 caused by the second bearing 60 contacting the cover 70 during rotation, thereby increasing the service life of the ball valve 100.

[0046] In order to prevent the fluid in the accommodating chamber 101 from leaking and to prevent impurities in the outside air from entering the accommodating chamber 101, in one embodiment, Figure 1As shown, the ball valve 100 also includes a third sealing member 34. A sealing groove 302 recessed toward the axis of the valve stem 30 is opened on the outer periphery of the valve stem 30. The third sealing member 34 is installed in the sealing groove 302, and at least a portion of the third sealing member 34 abuts against the inner wall of the cover 70 to seal the connection between the valve stem 30 and the cover 70.

[0047] Specifically, the third sealing member 34 is an O-ring.

[0048] In one embodiment, if Figure 1 and Figure 2 As shown, a limiting groove 402 is provided at one end of the valve ball 40 close to the valve stem 30, and a limiting portion 32 is provided at one end of the valve stem 30. The limiting portion 32 is inserted into the limiting groove 402 and cooperates with the groove wall of the limiting groove 402 to prevent rotation along the circumference of the valve ball 40. In this way, the processing is simple, and the two side walls of the limiting portion 32 and the two groove walls of the limiting groove 402 abut against each other, which can prevent the limiting portion 32 from rotating relative to the limiting groove 402, thereby facilitating the valve stem 30 to drive the valve ball 40. At the same time, a detachable connection between the valve stem 30 and the valve ball 40 can also be achieved, which is convenient for subsequent replacement and maintenance.

[0049] Furthermore, in one embodiment, the bottom wall of the limiting groove 402 is recessed in a direction away from the valve stem 30 to form a second positioning hole 403, and the end of the limiting portion 32 close to the valve ball 40 is protruding to form a second positioning column 33, and the second positioning column 33 is inserted and connected to the second positioning hole 403. Through the positioning cooperation between the second positioning column 33 and the second positioning hole 403, the reliability of the connection between the valve ball 40 and the valve stem 30 is further improved, and the valve stem 30 and the valve ball 40 can be prevented from moving along the extension direction of the limiting groove 402, so that the consistency of the axis of the valve ball 40 can be effectively ensured.

[0050] In other embodiments, the limiting cooperation between the valve stem 30 and the valve ball 40 can also be achieved by opening a second positioning hole 403 on the limiting portion 32 and disposing a second positioning column 33 on the bottom wall of the limiting groove 402 .

[0051] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A ball valve, characterized in that: The valve body (10) comprises a first valve body (10), a second valve body (20), a valve stem (30), a valve ball (40), a first bearing (50) and a second bearing (60), wherein the first valve body (10) is provided with a receiving cavity (101), the valve ball (40) is received in the receiving cavity (101), and the second valve body (20) is connected to the first valve body (10); The first valve body (10) is further provided with a first valve port (103) and a mounting hole (104) communicating with the accommodating cavity (101); the second valve body (20) is provided with a second valve port (201) communicating with the accommodating cavity (101); one end of the valve stem (30) extends into the mounting hole (104) and is positionally connected with the valve ball (40); and the valve stem (30) can drive the valve ball (40) to rotate so as to connect or disconnect the first valve port (103) and the second valve port (201); The first bearing (50) is arranged in the accommodating cavity (101) and is located on the side of the valve ball (40) away from the valve stem (30), and the second bearing (60) is sleeved on the outer periphery of the valve stem (30), wherein the valve ball (40) is rotatably connected to the first valve body (10) through the first bearing (50), and the valve stem (30) is rotatably connected to the first valve body (10) through the second bearing (60).

2. The ball valve according to claim 1, characterized in that: The inner wall of the accommodating cavity (101) is recessed in a direction away from the valve stem (30) to form a first installation groove (105), and the first bearing (50) is installed in the first installation groove (105); The outer ring of the first bearing (50) cooperates with the side wall of the first mounting groove (105), the inner ring of the first bearing (50) is connected with a first positioning column (51), and the first positioning column (51) is connected to the valve ball (40).

3. The ball valve according to claim 2, characterized in that: The valve ball (40) is provided with a first positioning hole (401), and the first positioning column (51) is inserted into and connected to the first positioning hole (401).

4. The ball valve according to claim 1, characterized in that: The side wall of the valve stem (30) is formed with a first step portion (31), and the inner wall of the mounting hole (104) is formed with a second step portion (11). The first step portion (31) and the second step portion (11) are arranged flush with each other to form a second mounting groove (301), and the second bearing (60) is mounted in the second mounting groove (301).

5. The ball valve according to claim 1, characterized in that: The ball valve further comprises a sealing cover (70), wherein the sealing cover (70) is sleeved on the outer periphery of the valve stem (30) and connected to the first valve body (10); Wherein, one end of the sealing cover (70) close to the valve ball (40) stops at the second bearing (60).

6. The ball valve according to claim 5, characterized in that: The ball valve further comprises a gasket (80), which is arranged between the sealing cover (70) and the second bearing (60) and abuts against the sealing cover (70) and the second bearing (60) respectively.

7. The ball valve according to claim 5, characterized in that: The valve stem (30) at least partially extends out from an end of the sealing cover (70) away from the valve ball (40).

8. The ball valve according to claim 1, characterized in that: The first bearing (50) and the second bearing (60) are coaxially arranged.

9. The ball valve according to claim 1, characterized in that: A limiting groove (402) is provided at one end of the valve ball (40) close to the valve stem (30), and a limiting portion (32) is provided at one end of the valve stem (30). The limiting portion (32) is inserted into the limiting groove (402) and cooperates with the groove wall of the limiting groove (402) to prevent rotation along the circumference of the valve ball (40).

10. The ball valve according to claim 9, characterized in that The bottom wall of the limiting groove (402) is recessed in a direction away from the valve stem (30) to form a second positioning hole (403), and one end of the limiting portion (32) close to the valve ball (40) is protruding to form a second positioning column (33), and the second positioning column (33) is inserted into and connected to the second positioning hole (403).

11. The ball valve according to claim 1, characterized in that: The ball valve further comprises a first sealing member (12) and a second sealing member (21), wherein the first sealing member (12) is arranged between the valve ball (40) and the first valve body (10), and the second sealing member (21) is arranged between the valve ball (40) and the second valve body (20).

12. The ball valve according to claim 1, characterized in that: The first valve body (10) and the second valve body (20) are threadedly matched.

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