Ball valve

Abstract

The utility model relates to the technical field of valves, and discloses a ball valve. The ball valve comprises a valve body, a main cavity, a connecting tail cavity and a transition cavity communicated between the main cavity and the connecting tail cavity are formed in the valve body, a valve seat base is arranged in the transition cavity, an instrument opening is formed in the outer side wall of the valve body in a protruding mode, at least part of the instrument opening is located on the periphery of the transition cavity, and a connecting hole is formed in the side wall of the transition cavity. The connecting hole is communicated with the instrument opening and the transition cavity, and the connecting hole is eccentrically formed in the instrument opening and located at the position avoiding the valve seat base. The connecting hole is machined in the eccentric position of the instrument opening, so that the connecting hole effectively avoids the valve seat base, at the moment, the connecting hole can still play a role in communicating the instrument opening with the transition cavity, and meanwhile the overall structural strength of the valve seat base can be effectively protected on the premise that the total length of the valve body is not increased.

Description

Technical Field

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

[0002] Ball valves are usually used in heat pump systems or floor heating systems, and mainly play functions such as shutoff, distribution, and sewage discharge in the system.

[0003] like Figure 1 and Figure 2 As shown, the inner cavity of the valve body 100 of the ball valve is divided into three areas, namely the main cavity 101 for installing the valve core and the valve seat, the connecting tail cavity 102 for connecting the flexible pipe, and the transition cavity 103 located between the main cavity 101 and the connecting tail cavity 102. The transition cavity 103 mainly plays a receiving role, and a valve seat base 104 is also required to be set in the transition cavity 103 to limit the installation of the valve seat. Since some ball valves have the need to detect parameters such as pressure and temperature, an instrument port 105 is usually set on the valve body 100 to install detection instruments such as thermometers and pressure gauges. The instrument port 105 is mainly located in the transition cavity 103 area. A connecting hole 106 is also required on the side wall of the transition cavity 103 to connect the inner cavity of the valve body 100 with the thermometer and pressure gauge, so that the thermometer and pressure gauge can detect the pressure and temperature values ​​in the inner cavity.

[0004] However, due to cost and installation space considerations, the transition cavity 103 cannot be designed to be too long. Figure 1 As shown, in the existing valve body 100, the connecting hole 106 is arranged in the middle of the instrument port 105, that is, the instrument port 105 and the connecting hole 106 are arranged coaxially. However, since the instrument port 105 is mainly located in the transition cavity 103 area, when the transition cavity 103 is not lengthened, Figure 2 As shown, the coaxial arrangement will cause the connecting hole 106 to partially penetrate the valve seat base 104 in the transition cavity 103, which greatly reduces the strength of the valve seat base 104 and increases the risk of product leakage.

[0005] Therefore, it is urgent to provide a ball valve to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a ball valve which can effectively ensure the strength of the valve seat base without increasing the total length of the product.

[0007] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0008] A ball valve comprises a valve body, wherein a main cavity, a connecting tail cavity and a transition cavity connected between the main cavity and the connecting tail cavity are arranged in the valve body, a valve seat base is arranged in the transition cavity, an instrument port is convexly arranged on the outer wall of the valve body, the instrument port is at least partially located on the outer periphery of the transition cavity, a connecting hole is arranged on the side wall of the transition cavity, the connecting hole connects the instrument port and the transition cavity, and the connecting hole is eccentrically arranged at the instrument port and is located to avoid the valve seat base.

[0009] As an optional solution, two instrument ports are protruding from the outer wall of the valve body, and the two instrument ports are symmetrically arranged about the axis of the transition cavity, and each instrument port is connected to the transition cavity through the corresponding connecting hole.

[0010] As an optional solution, a plug is detachably connected to the instrument port.

[0011] As an optional solution, the ball valve also includes a valve ball, a valve stem and a handle. The valve ball is rotatably disposed in the main cavity, one end of the valve stem is fixedly connected to the valve ball, and the other end extends out of the valve body and is connected to the handle, and the instrument port and the handle are staggered in the circumferential direction of the valve body.

[0012] As an optional scheme, the ball valve also includes a valve cover and two valve seats, a water inlet and a water outlet are respectively provided at the axial ends of the valve body, the valve ball is provided with a channel for connecting the water inlet and the water outlet, the valve cover is connected to the free end of the main cavity, the two valve seats are spaced apart in the main cavity, one of the valve seats abuts against the valve seat base, the other valve seat abuts against the valve cover, and the two sides of the valve ball are respectively pressed against the corresponding valve seats.

[0013] As an optional solution, the ball valve also includes a filter screen and a sewage discharge assembly, the filter screen is arranged in the channel, a guide hole connected to the channel is opened at the bottom of the valve ball, a mounting seat is provided on the valve body, a mounting hole connected to the guide hole is opened on the mounting seat, the filter screen passes through the guide hole and extends into the mounting hole, and the sewage discharge assembly is arranged on the mounting seat to open or close the mounting hole.

[0014] As an optional solution, the sewage discharge assembly includes a filter cap, a universal joint, a valve core and a sealing gasket, the filter cap is connected to the mounting seat, the filter cap is provided with a discharge port connected to the mounting hole, the universal joint is rotatably connected to the filter cap, the universal joint is provided with a sewage discharge port, the valve core is threadedly connected to the filter cap, the sealing gasket is sleeved on one end of the valve core close to the discharge port, and the valve core cooperates with the sealing gasket to open and close the discharge port.

[0015] As an optional solution, the valve core and the sealing gasket are a vulcanized integrally formed structure.

[0016] As an optional solution, the ball valve also includes a pipe joint and a first nut, the pipe joint is connected to the valve cover, the first nut is sleeved on the pipe joint and threadedly connected to the valve cover, a first limiting portion is provided at the end of the pipe joint, and a first limiting groove is provided on the first nut to be embedded and matched with the first limiting portion.

[0017] As an optional solution, a second sealing ring is provided between the valve cover and the pipe joint.

[0018] The beneficial effects of the utility model are:

[0019] The ball valve provided by the utility model effectively avoids the valve seat base by processing the connection hole at the eccentric position of the instrument port, and the connection hole can still play the role of connecting the instrument port and the transition cavity. At the same time, the above arrangement can effectively protect the overall structural strength of the valve seat base without increasing the total length of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to explain the embodiments of the utility model or the technical solutions in the prior art more clearly and easily, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. The drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of a valve body provided by the prior art;

[0022] Figure 2 is a cross-sectional view of a valve body provided by the prior art;

[0023] Figure 3 It is a structural schematic diagram of a valve body provided by an embodiment of the utility model;

[0024] Figure 4 is a cross-sectional view of a valve body provided by an embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the ball valve provided by the embodiment of the utility model. Figure 1 ;

[0026] Figure 6 This is a schematic diagram of the structure of the ball valve provided by the embodiment of the utility model. Figure 2 ;

[0027] Figure 7is a cross-sectional view of a ball valve provided by an embodiment of the utility model;

[0028] Figure 8 It is a schematic diagram of the matching of the valve ball and the filter screen provided in the embodiment of the utility model;

[0029] Fig. 9 yes Figure 7 A partial enlarged view of point A in the middle.

[0030] In the figure:

[0031] 100, valve body; 101, main cavity; 102, connecting tail cavity; 103, transition cavity; 104, valve seat base; 105, instrument port; 106, connecting hole;

[0032] 10. Valve body; 11. Main cavity; 12. Transition cavity; 121. Valve seat base; 13. Connecting tail cavity; 14. Instrument port; 15. Connecting hole; 16. Plug; 17. Water inlet; 18. Water outlet; 19. Mounting seat; 191. Mounting hole;

[0033] 20. Valve cover; 30. Valve stem; 31. Handle; 40. Valve ball; 41. Channel; 42. Guide hole; 50. Valve seat;

[0034] 60. sewage discharge assembly; 61. filter cap; 611. discharge port; 62. universal joint; 621. sewage discharge port; 63. valve core; 631. first sealing ring; 632. raised portion; 64. sealing pad; 65. sewage discharge pipe; 66. plugging cover; 661. groove; 70. filter screen; 71. opening;

[0035] 80. pipe joint; 81. first nut; 82. first limiting portion; 83. first limiting groove; 84. second sealing ring;

[0036] 90. thread joint; 91. second nut; 92. second limiting portion; 93. second limiting groove; 94. third sealing ring; 95. fourth sealing ring. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] This embodiment provides a ball valve, including a valve body 10, such as Figure 3 and Figure 4 As shown, a main cavity 11, a connecting tail cavity 13 and a transition cavity 12 connected between the main cavity 11 and the connecting tail cavity 13 are provided in the valve body 10. The transition cavity 12 mainly plays a receiving role. A valve seat base 121 is convexly provided in the transition cavity 12. An instrument port 14 is convexly provided on the outer wall of the valve body 10. The instrument port 14 is at least partially located on the outer periphery of the transition cavity 12, and the valve seat base 121 is located on the axis of the instrument port 14. The instrument port 14 is used to install a thermometer or other detection device. A connecting hole 15 is provided on the side wall of the transition cavity 12. The connecting hole 15 is used to connect the instrument port 14 and the transition cavity 12, so that the thermometer can detect the pressure and temperature of the fluid in the transition cavity 12. The connecting hole 15 is eccentrically arranged at the instrument port 14 and is located at a position to avoid the valve seat base 121.

[0042] The ball valve provided in this embodiment uses a specific process to process the connection hole 15 at an eccentric position of the instrument port 14, so that the connection hole 15 effectively avoids the valve seat base 121. At this time, the connection hole 15 can still play the role of connecting the instrument port 14 and the transition cavity 12. At the same time, the above arrangement can effectively protect the overall structural strength of the valve seat base 121 without increasing the total length of the valve body 10.

[0043] like Figure 5 As shown, the meter port 14 is detachably connected with a plug 16. When the thermometer and pressure gauge are not installed, the plug 16 is connected to the meter port 14 to cut off the water flow. When the thermometer and pressure gauge need to be installed, the plug 16 can be removed and the voltage regulator can be installed on the meter port 14, which is flexible and convenient to use. Optionally, the plug 16 is threadedly connected to the meter port 14, which is convenient for disassembly and assembly, and has reliable sealing. On this basis, the thermometer and pressure gauge can also be threadedly connected to the meter port 14.

[0044] In an optional embodiment, if Figure 6 As shown, two instrument ports 14 are convexly provided on the outer wall of the valve body 10, and the two instrument ports 14 are symmetrically arranged about the axis of the transition cavity 12, and each instrument port 14 is connected to the transition cavity 12 through a corresponding connecting hole 15, and each instrument port 14 can be connected to a plug 16. It can be understood that due to the different installation environments in the user's home, the installation directions of different ball valves may be different, resulting in different flow directions of the fluids in different ball valves. However, a temperature and pressure gauge can only detect the temperature and pressure values ​​of the fluid in one flow direction. Therefore, by setting two instrument ports 14, two temperature and pressure gauges can be installed at the same time, and the two temperature and pressure gauges can detect the temperature and pressure values ​​of the fluids in different flow directions, thereby being compatible with different working conditions and installation environments, and having strong versatility.

[0045] Specifically, combined Figure 4 and Figure 7The ball valve also includes a valve cover 20, a valve stem 30, a valve ball 40 and two valve seats 50. The axial ends of the valve body 10 are respectively provided with a water inlet 17 and a water outlet 18. The valve cover 20 is connected to the free end of the main cavity 11. The two valve seats 50 are arranged in the main cavity 11 at intervals. One of the valve seats 50 abuts against the valve seat base 121, and the other valve seat 50 abuts against the valve cover 20, thereby realizing the limited installation of the two valve seats 50. The valve ball 40 is located in the main cavity 11, and the two sides of the valve ball 40 are respectively pressed against the corresponding valve seats 50, thereby realizing the limited installation of the valve ball 40. The valve ball 40 is provided with a channel 41 for connecting the water inlet 17 and the water outlet 18. One end of the valve stem 30 is fixedly connected to the valve ball 40, and the other end extends out of the valve body 10 and is connected to the handle 31. When the ball valve is in an open state, the valve ball 40 is in an initial position, the water inlet 17, the water outlet 18 and the channel 41 are connected to achieve fluid conduction, and by rotating the handle 31, the valve stem 30 and the valve ball 40 are driven to rotate, so that the channel 41 is disconnected from the water inlet 17 and the water outlet 18 to achieve fluid cutoff, thereby achieving the closure of the ball valve.

[0046] like Figure 6 As shown, the instrument port 14 and the handle 31 are staggered in the circumferential direction of the valve body 10. That is, the handle 31 is located on the upper side of the valve body 10, and the two instrument ports 14 are respectively located on the front and rear sides of the valve body 10. This layout can prevent the handle 31 from interfering with the thermometer after installation.

[0047] In an optional embodiment, if Figure 7 and Figure 8 As shown, the ball valve also includes a filter screen 70 and a sewage assembly 60. The filter screen 70 is arranged in the channel 41. The filter screen 70 is a cylinder. An opening 71 connected to the channel 41 is opened on one side of the filter screen 70. A guide hole 42 connected to the channel 41 is opened at the bottom of the valve ball 40. A mounting seat 19 is integrally formed at the bottom of the valve body 10. A mounting hole 191 connected to the guide hole 42 is opened on the mounting seat 19. The filter screen 70 passes through the guide hole 42 and extends into the mounting hole 191. The sewage assembly 60 is arranged on the mounting seat 19 to open or close the mounting hole 191. When the ball valve is opened, the opening 71 of the filter 70 faces the water inlet 17, and the water from the water inlet 17 enters the filter 70 from the opening 71, and then flows out through the water outlet 18. The filtered impurities remain inside the filter 70 and remain in the mounting hole 191. After the sewage discharge component 60 opens the mounting hole 191, the impurities can be discharged from the mounting hole 191 in time through the sewage discharge component 60, and there is no need to remove the filter 70. The operation is convenient and the efficiency is higher.

[0048] In an optional embodiment, if Fig. 9As shown, the sewage discharge assembly 60 includes a filter cap 61, a universal joint 62, a valve core 63 and a sealing gasket 64. The filter cap 61 is fixedly connected to the mounting seat 19. The filter cap 61 is provided with a discharge port 611 connected to the mounting hole 191. The universal joint 62 is sleeved on the filter cap 61 and rotatably connected to the filter cap 61. The universal joint 62 is provided with a sewage discharge port 621. The valve core 63 is threadedly connected to the filter cap 61 and is located on the same axis as the discharge port 611. The sealing gasket 64 is sleeved on one end of the valve core 63 close to the discharge port 611. The valve core 63 cooperates with the sealing gasket 64 to open and close the discharge port 611. The valve core 63 is rotated to move along the axis direction of the discharge port 611, and the valve core 63 drives the sealing gasket 64 to move to block or open the discharge port 611, so as to facilitate the control of the discharge of impurities. After the valve core 63 drives the sealing gasket 64 to open the discharge port 611, the impurities can be discharged to the sewage outlet 621 through the discharge port 611. The universal joint 62 can rotate 360 ​​degrees on the filter cap 61, so as to adjust the direction of the sewage outlet 621 and discharge the impurities to a suitable position.

[0049] Among them, a first sealing ring 631 is arranged between the valve core 63 and the universal joint 62, and a sealing groove is arranged on the peripheral side of the valve core 63. The first sealing ring 631 is embedded in the sealing groove of the valve core 63, thereby improving the sealing between the valve core 63 and the universal joint 62 and preventing impurities from seeping out from between the valve core 63 and the universal joint 62 to cause pollution.

[0050] It is understandable that the sealing gasket 64 is mounted on the valve core 63, and the sealing gasket 64 is limited by the raised stopper on the valve core 63 to prevent it from falling off. However, in actual use, since the valve core 63 is in a state of closing the discharge port 611 for a long time, the sealing gasket 64 is in a compressed and closed state for a long time, so that the sealing gasket 64 and the filter cap 61 are adhered at the fitting point. When the valve core 63 is opened instantly, the sealing gasket 64 and the valve core 63 will be separated and peeled off.

[0051] In order to solve the above problem, in an optional embodiment, the valve core 63 and the sealing gasket 64 are vulcanized integrally formed structures. The sealing gasket 64 is made of EPDM material, and the sealing gasket 64 of this material is directly coated on the upper end of the valve core 63 through a vulcanization process, thereby avoiding the problem of the sealing gasket 64 falling off due to long-term use and reducing product quality problems.

[0052] In an optional embodiment, if Fig. 9As shown, the sewage discharge assembly 60 also includes a sewage discharge pipe 65 and a plugging cover 66. The sewage discharge pipe 65 is integrally formed with the universal joint 62 and is connected to the sewage discharge port 621. The plugging cover 66 is threadedly connected to one end of the sewage discharge pipe 65 away from the universal joint 62. The sewage discharge pipe 65 can extend the position of the sewage discharge port 621 to facilitate the discharge of impurities. After opening the plugging cover 66, the impurities can be discharged through the sewage discharge pipe 65. After the discharge is completed, the plugging cover 66 is connected to the sewage discharge pipe 65 to avoid contamination caused by impurities. When the plugging cover 66 is opened, the pipeline can also be reversely flushed from an external water pipe in the sewage discharge pipe 65 to achieve the purpose of cleaning.

[0053] In an optional embodiment, if Fig. 9 As shown, the end of the valve core 63 away from the sealing gasket 64 is provided with a protrusion 632, and the plug cover 66 is provided with a groove 661 adapted to the protrusion 632, and the protrusion 632 and the groove 661 are connected to limit rotation. After the plug cover 66 is removed from the sewage pipe 65, the groove 661 of the plug cover 66 can be fitted on the protrusion 632 at the end of the valve core 63, and the plug cover 66 can be rotated to drive the valve core 63 to rotate, thereby achieving the purpose of opening and closing the valve core 63, which is easy to operate and saves time and effort.

[0054] In an optional embodiment, if Figure 5 and Figure 7 As shown, the ball valve also includes a pipe joint 80 and a first nut 81. The pipe joint 80 is connected to the valve cover 20. The first nut 81 is sleeved on the pipe joint 80 and threadedly connected to the valve cover 20. The end of the pipe joint 80 is integrally formed with a first limiting portion 82. The first nut 81 is provided with a first limiting groove 83 that is embedded and matched with the first limiting portion 82. Through the cooperation of the first limiting portion 82 and the first limiting groove 83, the pipe joint 80 can be limited to prevent the pipe joint 80 from being separated from the valve cover 20. Then, the first nut 81 is threadedly connected to the valve cover 20 to firmly connect the pipe joint 80 to the valve cover 20, so as to facilitate the installation of the valve body 10 in the pipeline through the pipe joint 80. Among them, the pipe joint 80 is a PPR pipe.

[0055] like Figure 7 As shown, a second sealing ring 84 is provided between the valve cover 20 and the pipe joint 80. A sealing groove is provided on the side of the valve cover 20 facing the pipe joint 80, and the second sealing ring 84 is embedded in the sealing groove, thereby improving the sealing between the valve cover 20 and the pipe joint 80 and preventing liquid from leaking from between the valve cover 20 and the pipe joint 80.

[0056] In an optional embodiment, in combination Figure 4 and Figure 7The ball valve further comprises a threaded connector 90 and a second nut 91, wherein the threaded connector 90 is connected to the connection tail cavity 13 of the valve body 10, the second nut 91 is sleeved on the threaded connector 90 and is threadedly connected to the outer periphery of the connection tail cavity 13, and a second limiting portion 92 is integrally formed at the end of the threaded connector 90, and a second limiting groove 93 is provided on the second nut 91 to be embedded and matched with the second limiting portion 92. Through the cooperation between the second limiting portion 92 and the second limiting groove 93, the threaded connector 90 can be limited to prevent the threaded connector 90 from being separated from the valve body 10, and then the second nut 91 is threadedly connected to the outer periphery of the connection tail cavity 13, and the threaded connector 90 is firmly connected to the valve body 10, so that the valve body 10 can be installed in the pipeline through the threaded connector 90.

[0057] like Figure 7 As shown, a third sealing ring 94 is provided between the thread joint 90 and the valve body 10, and the third sealing ring 94 is sleeved on the outside of the thread joint 90. The outer peripheral wall of the third sealing ring 94 close to the valve body 10 is inclined. The third sealing ring 94 can improve the sealing between the thread joint 90 and the valve body 10, and prevent liquid from leaking from between the valve body 10 and the thread joint 90. In addition, a fourth sealing ring 95 is sleeved on the outside of the thread joint 90, and the outer peripheral wall of the fourth sealing ring 95 away from the valve body 10 is inclined. When installing, the thread joint 90 is inserted into the external pipeline. The fourth sealing ring 95 can improve the sealing between the thread joint 90 and the external pipeline, and prevent liquid leakage.

[0058] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A ball valve, comprising a valve body (10), characterized in that: The valve body (10) is provided with a main cavity (11), a connecting tail cavity (13) and a transition cavity (12) connected between the main cavity (11) and the connecting tail cavity (13); a valve seat base (121) is provided in the transition cavity (12); an instrument port (14) is convexly provided on the outer wall of the valve body (10); the instrument port (14) is at least partially located on the outer periphery of the transition cavity (12); a connecting hole (15) is provided on the side wall of the transition cavity (12); the connecting hole (15) connects the instrument port (14) and the transition cavity (12); the connecting hole (15) is eccentrically arranged at the instrument port (14) and is located at a position avoiding the valve seat base (121).

2. The ball valve according to claim 1, characterized in that: Two instrument ports (14) are protrudingly provided on the outer side wall of the valve body (10), and the two instrument ports (14) are symmetrically arranged about the axis of the transition cavity (12), and each instrument port (14) is connected to the transition cavity (12) via a corresponding connecting hole (15).

3. The ball valve according to claim 1, characterized in that: A plug (16) is detachably connected to the instrument port (14).

4. The ball valve according to any one of claims 1 to 3, characterized in that: The ball valve further comprises a valve ball (40), a valve stem (30) and a handle (31); the valve ball (40) is rotatably disposed in the main cavity (11); one end of the valve stem (30) is fixedly connected to the valve ball (40), and the other end extends out of the valve body (10) and is connected to the handle (31); the instrument port (14) and the handle (31) are staggered in the circumferential direction of the valve body (10).

5. The ball valve according to claim 4, characterized in that: The ball valve further comprises a valve cover (20) and two valve seats (50), the axial ends of the valve body (10) are respectively provided with a water inlet (17) and a water outlet (18), the valve ball (40) is provided with a channel (41) for connecting the water inlet (17) and the water outlet (18), the valve cover (20) is connected to the free end of the main cavity (11), the two valve seats (50) are arranged in the main cavity (11) at intervals, one of the valve seats (50) is in contact with the valve seat base (121), and the other valve seat (50) is in contact with the valve cover (20), and the two sides of the valve ball (40) are respectively in contact with the corresponding valve seats (50).

6. The ball valve according to claim 5, characterized in that: The ball valve further comprises a filter screen (70) and a sewage discharge assembly (60); the filter screen (70) is arranged in the channel (41); a flow guide hole (42) communicating with the channel (41) is provided at the bottom of the valve ball (40); a mounting seat (19) is provided on the valve body (10); a mounting hole (191) communicating with the flow guide hole (42) is provided on the mounting seat (19); the filter screen (70) passes through the flow guide hole (42) and extends into the mounting hole (191); and the sewage discharge assembly (60) is arranged on the mounting seat (19) to open or close the mounting hole (191).

7. The ball valve according to claim 6, characterized in that: The sewage discharge assembly (60) comprises a filter cap (61), a universal joint (62), a valve core (63) and a sealing gasket (64); the filter cap (61) is connected to the mounting seat (19); a discharge port (611) communicating with the mounting hole (191) is provided on the filter cap (61); the universal joint (62) is rotatably connected to the filter cap (61); a sewage discharge port (621) is provided on the universal joint (62); the valve core (63) is threadedly connected to the filter cap (61); the sealing gasket (64) is sleeved on one end of the valve core (63) close to the discharge port (611); the valve core (63) cooperates with the sealing gasket (64) to open and close the discharge port (611).

8. The ball valve according to claim 7, characterized in that: The valve core (63) and the sealing gasket (64) are a vulcanized integrally formed structure.

9. The ball valve according to claim 5, characterized in that: The ball valve further comprises a pipe joint (80) and a first nut (81); the pipe joint (80) is connected to the valve cover (20); the first nut (81) is sleeved on the pipe joint (80) and is threadedly connected to the valve cover (20); a first limiting portion (82) is provided at the end of the pipe joint (80); and a first limiting groove (83) is provided on the first nut (81) and is embedded and matched with the first limiting portion (82).

10. The ball valve according to claim 9, characterized in that A second sealing ring (84) is provided between the valve cover (20) and the pipe joint (80).

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