A ball valve with flushing function

Abstract

This utility model discloses a ball valve with a flushing function, including a valve body, a valve cover, an actuator, a valve stem, and a ball. The valve cover is installed on the upper end of the valve body and has a shaft hole. The valve body has a valve cavity, and the valve stem passes through the shaft hole. The lower end of the valve stem is linked to the ball located in the valve cavity. A valve seat is installed in the valve body, and a bracket is installed on the upper end of the valve body. The actuator is installed on the bracket, and the output end of the actuator is linked to the upper end of the valve stem. The upper end of the valve body has a valve neck with a water inlet hole. A first plug is threaded to the outer end of the water inlet hole. The valve stem has a water inlet channel and multiple water outlet channels, which are evenly distributed on the outer circumference of the valve stem. The outer ends of the water outlet channels are connected to the valve cavity. A drain hole is provided through the bottom of the valve body. This utility model can significantly improve the flushing effect of the inner wall of the valve cavity by setting only one water inlet, which not only facilitates processing and production but also effectively extends the service life of the ball valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a ball valve with a flushing function. Background Technology

[0002] Ball valves are widely used in fluid control. In fluid control applications, ball valves in pipelines are mainly used to open, close, distribute the flow of fluid media, and change the flow direction and velocity of fluid media.

[0003] Currently, ball valves on the market generally include a valve body, valve cover, valve stem, and ball. The valve cover is installed on the upper part of the valve body, and the valve stem passes through the valve cover and extends into the valve body to be linked with the ball. A valve seat is installed inside the valve body to form a sealing fit with the ball when the valve is closed. To prevent impurities from accumulating in the valve cavity after long-term use, which could scratch and damage the sealing surface between the ball and the valve seat, the valve cavity usually needs to be flushed periodically. The existing practice is to set a water inlet at the upper end of the valve body and a drain outlet at the lower end. High-pressure water is introduced through the water inlet to flush the inner wall of the valve cavity, and wastewater is discharged from the drain outlet. Referencing Chinese Utility Model Patent Application No. CN202120212896.5, this valve uses flushing components C and D at both ends of the valve body to clean the inside of the main valve body when the shield machine is stopped or when the mud ball valve is opened. However, in this structure, the upper water inlet connector provides unidirectional water flushing, which has a very limited flushing effect on the inner wall of the valve cavity. If a water inlet connector is added, the processing difficulty and manufacturing cost will increase. Therefore, it is necessary to improve the structure to improve the flushing effect on the inner wall of the valve cavity, thereby effectively extending the service life of the ball valve. Utility Model Content

[0004] The purpose of this invention is to provide a ball valve with a flushing function. This invention can significantly improve the flushing effect of the valve cavity wall when only one inlet is provided, which not only facilitates processing and production, but also effectively extends the service life of the ball valve.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a ball valve with a flushing function, comprising a valve body, a valve cover, an actuator, a valve stem, and a ball. The valve cover is installed on the upper end of the valve body and has a shaft hole. The valve body has a valve cavity, and the valve stem passes through the shaft hole. The lower end of the valve stem is linkedly connected to a ball disposed in the valve cavity. A valve seat is installed in the valve body for forming a sealing fit with the ball when the valve is closed. A bracket is installed on the upper end of the valve body, and the actuator is installed on the bracket. On the frame, the output end of the actuator is linked to the upper end of the valve stem; the upper end of the valve body is provided with a valve neck, and a water inlet hole is provided through the valve neck. A first screw plug is threaded to the outer end of the water inlet hole. The valve stem is provided with a water inlet channel communicating with the water inlet hole and multiple water outlet channels communicating with the water inlet channel. The multiple water outlet channels are evenly distributed on the outer periphery of the valve stem, and the outer end of the water outlet channel is connected to the valve cavity; a drain hole is provided through the bottom of the valve body, and a hexagonal screw plug is threaded to the drain hole.

[0006] By adopting the above technical solution, the inlet hole is located on the valve body, while the inlet and outlet channels are both located on the valve stem. The outlet channels are arranged in a multiple circumferential array. When the valve is closed, a high-pressure water pipe is connected to the inlet hole. High-pressure water enters through the inlet hole, flows through the inlet channel, and is then sprayed in multiple directions around the valve cavity through the multiple outlet channels, flushing the inner wall of the valve cavity and the outer wall of the ball valve. Wastewater finally flows out through the drain hole at the bottom of the valve body, thus achieving the cleaning of the inner wall of the valve cavity. This ball valve, with only one inlet, can significantly improve the flushing effect of the inner wall of the valve cavity, which not only facilitates manufacturing but also effectively extends the service life of the ball valve.

[0007] The present invention is further configured such that the water inlet channel includes an annular groove disposed on the outer periphery of the valve stem, an axial hole disposed at the center of the valve stem and extending axially, and a plurality of radial holes arranged in a circumferential array to connect the annular groove and the axial hole. The water inlet hole is connected to the annular groove, and the water outlet channel is connected to the axial hole.

[0008] By adopting the above technical solution, an annular groove is set on the outer periphery of the valve stem for connection with the water inlet hole, which facilitates the installation of the valve stem. That is, no matter what the installation angle is, the water inlet hole can always be connected with the annular groove.

[0009] The present invention is further configured such that the axial hole extends upward from the lower end of the valve stem, and the lower end of the valve stem is provided with a threaded groove coaxial with the axial hole, and a second plug is threadedly connected to the threaded groove.

[0010] By adopting the above technical solution, it is convenient to process the axial hole, and the lower end of the axial hole is blocked by the second screw plug, so that the medium can only flow into the valve cavity sequentially from the annular groove, radial hole, axial hole and water outlet channel.

[0011] The present invention is further configured such that a threaded sleeve with an internal thread is interference-fitted or welded inside the water inlet hole, and the first screw plug is threadedly engaged with the threaded sleeve.

[0012] By adopting the above technical solution, there is no need to drill threaded holes on the valve body. Only a through hole (water inlet hole) needs to be drilled on the valve body, and then the threaded sleeve can be fixedly installed on the through hole, which greatly facilitates the processing and production.

[0013] The present invention is further configured such that a sealing gasket is sandwiched between the outer end of the first screw plug and the outer wall of the valve neck.

[0014] By adopting the above technical solution, the sealing between the screw plug and the water inlet hole can be guaranteed, and the internal medium can be prevented from leaking through the gap between the two.

[0015] The present invention is further configured such that a first sealing ring is installed on the outer circular surface of the valve stem at a position corresponding to the position above and below the annular groove, respectively, for forming a sealing fit with the inner wall of the valve neck.

[0016] By adopting the above technical solution, the high-pressure water entering through the inlet hole can only enter the valve cavity through the inlet and outlet channels, reducing the pressure loss of the high-pressure water before entering the cavity and enabling the high-pressure water to effectively impact the inner wall of the valve cavity for cleaning.

[0017] The present invention is further configured such that the upper end of the valve body is provided with a first positioning groove for the lower half of the valve cover to be embedded, the lower end of the bracket is provided with a second positioning groove for the upper half of the valve cover to be embedded, the valve cover and the bracket are both locked to the upper end of the valve body by fasteners, and the outer periphery of the valve stem is provided with a limiting step that abuts against the lower end of the valve cover to form an axial limiting step.

[0018] By adopting the above technical solution, the valve body, valve cover and bracket can be positioned and installed. The connection structure is simple and reliable, and disassembly and assembly are very convenient.

[0019] The present invention is further configured such that a second sealing ring for forming a sealing fit with the outer circular surface of the valve stem and a third sealing ring for forming a sealing fit with the inner circular surface of the valve neck are respectively installed on the inner and outer circular surfaces of the valve cover extending into the valve neck, and a fourth sealing ring is sandwiched between the valve cover and the first positioning groove.

[0020] By adopting the above technical solution, the sealing between the valve cover and the valve stem, as well as between the valve cover and the valve body, can be guaranteed, preventing leakage of internal media between the valve cover and the valve stem, and between the valve cover and the valve body.

[0021] The present invention is further configured such that a packing groove coaxial with the shaft hole is provided at the upper end of the valve cover, a sealing packing is embedded in the packing groove, a packing gland is fitted around the outer periphery of the valve stem, the packing gland is locked to the upper end of the valve body by fasteners, and the lower end of the packing gland extends into the packing groove to press the sealing packing into the packing groove.

[0022] By adopting the above technical solution and using packing for secondary sealing, even if the seal between the valve cover and the valve stem fails, the packing seal can still ensure the seal between the valve cover and the valve stem, preventing the internal medium from leaking to the outside through the gap between the two, and improving the reliability of the sealing structure. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle.

[0025] In the diagram: 1. Valve body; 2. Valve cover; 3. Actuator; 4. Valve stem; 5. Ball; 6. Shaft hole; 7. Valve cavity; 8. Valve seat; 9. Bracket; 10. Valve neck; 11. Inlet hole; 12. First screw plug; 13. Inlet channel; 14. Outlet channel; 15. Drain hole; 16. Hexagonal screw plug; 17. Annular groove; 18. Axial hole; 19. Radial hole; 20. Threaded groove; 21. Second screw plug; 22. Screw sleeve; 23. Sealing gasket; 24. First sealing ring; 25. First positioning groove; 26. Second positioning groove; 27. Limiting step; 28. Second sealing ring; 29. ​​Third sealing ring; 30. Fourth sealing ring; 31. Packing groove; 32. Sealing packing; 33. Packing gland. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example: As attached Figure 1 and attached Figure 2The ball valve shown includes a flushing function, comprising a valve body 1, a valve cover 2, an actuator 3, a valve stem 4, and a ball 5. The valve cover 2 is mounted on the upper end of the valve body 1 and has a shaft hole 6. The valve body 1 has a valve cavity 7. The valve stem 4 passes through the shaft hole 6, and its lower end is linked to the ball 5 located in the valve cavity 7. Specifically, the two can be connected by a key. A valve seat 8 is installed in the valve body 1 to form a sealing fit with the ball 5 when the valve is closed. A bracket 9 is mounted on the upper end of the valve body 1, and the actuator 3 is mounted on the bracket 9. The output end of the actuator 3 is linked to the upper end of the valve stem 4. The actuator 3 can be a handwheel, an electric actuator, or a pneumatic actuator. Alternatively, a hydraulic actuator can be used. Additionally, a support shaft can be installed at the bottom of the valve body 1, and the bottom of the ball 5 is provided with a circular groove for rotational engagement with the support shaft. A bushing is also provided between the two to reduce friction. The upper end of the valve body 1 has a valve neck 10, through which a water inlet hole 11 is provided. A first plug 12 is threaded to the outer end of the water inlet hole 11. The valve stem 4 has a water inlet channel 13 communicating with the water inlet hole 11 and multiple water outlet channels 14 communicating with the water inlet channel 13. The multiple water outlet channels 14 are evenly distributed around the outer circumference of the valve stem 4, and the outer ends of the water outlet channels 14 are connected to the valve cavity 7. A drain hole 15 is provided through the bottom of the valve body 1, and a hexagonal plug 16 is threaded to the drain hole 15. The water inlet hole 11 is located on the valve body 1, and the water inlet channel 13 and water outlet channels 14 are both located on the valve stem 4. The water outlet channels 14 are multiple channels arranged in a circumferential array. When the valve is closed, a high-pressure water pipe is connected to the inlet 11. High-pressure water enters through the inlet 11, flows through the inlet channel 13, and is then sprayed in multiple directions from multiple outlet channels 14 towards the valve cavity 7, flushing the inner wall of the valve cavity 7 and the outer wall of the ball 5. The wastewater finally flows out through the drain hole 15 at the bottom of the valve body 1, thus cleaning the inner wall of the valve cavity 7. This ball valve, with only one inlet, can significantly improve the flushing effect on the inner wall of the valve cavity 7, which not only facilitates manufacturing but also effectively extends the service life of the ball valve.

[0028] As attached Figure 2 As shown, the water inlet channel 13 includes an annular groove 17 disposed on the outer periphery of the valve stem 4, an axial hole 18 disposed at the center of the valve stem 4 and extending axially, and a plurality of radial holes 19 arranged in a circumferential array to connect the annular groove 17 and the axial hole 18. The water inlet hole 11 is connected to the annular groove 17, and the water outlet channel 14 is connected to the axial hole 18. The annular groove 17 is provided on the outer periphery of the valve stem 4 for connection with the water inlet hole 11, which facilitates the installation of the valve stem 4. That is, regardless of the installation angle, the water inlet hole 11 can always be connected to the annular groove 17.

[0029] As attached Figure 2As shown, the axial hole 18 extends upward from the lower end of the valve stem 4, and a threaded groove 20 coaxial with the axial hole 18 is provided at the lower end of the valve stem 4. A second plug 21 is threaded onto the threaded groove 20. This design facilitates the machining of the axial hole 18, and by blocking the lower end of the axial hole 18 with the second plug 21, the medium can only flow into the valve chamber 7 sequentially from the annular groove 17, the radial hole 19, the axial hole 18, and the water outlet channel 14.

[0030] As attached Figure 2 As shown, the inlet hole 11 is fitted with an internally threaded sleeve 22 through interference fit or welding. The outer surface of the sleeve 22 is smooth. The first screw plug 12 is threadedly engaged with the sleeve 22. There is no need to drill a threaded hole in the valve body 1; only a through hole (inlet hole 11) needs to be drilled in the valve body 1, and the sleeve 22 can be fixedly installed in the through hole, greatly simplifying the manufacturing process.

[0031] As attached Figure 2 As shown, a sealing gasket 23 is sandwiched between the outer end of the first screw plug 12 and the outer wall of the valve neck 10. This design ensures the sealing between the screw plug and the water inlet 11, preventing internal media from leaking through the gap between them.

[0032] As attached Figure 2 As shown, a first sealing ring 24 is installed on the outer circumference of the valve stem 4 at a position above and below the annular groove 17, respectively, to form a sealing fit with the inner wall of the valve neck 10. This design ensures that the high-pressure water entering through the inlet hole 11 can only enter the valve cavity 7 through the inlet channel 13 and the outlet channel 14, reducing the pressure loss of the high-pressure water before entering the cavity, and enabling the high-pressure water to effectively impact and clean the inner wall of the valve cavity 7.

[0033] As attached Figure 2 As shown, the upper end of the valve body 1 is provided with a first positioning groove 25 for the lower half of the valve cover 2 to be inserted, and the lower end of the bracket 9 is provided with a second positioning groove 26 for the upper half of the valve cover 2 to be inserted. The valve cover 2 and the bracket 9 are both locked to the upper end of the valve body 1 by fasteners. The outer periphery of the valve stem 4 is provided with a limiting step 27 that abuts against the lower end of the valve cover 2 to form an axial limiting step. This design can realize the positioning and installation of the valve body 1, valve cover 2 and bracket 9. The connection structure is simple and reliable, and disassembly and assembly are very convenient.

[0034] As attached Figure 2As shown, the inner and outer circular surfaces of the valve cover 2 extending into the valve neck 10 are respectively equipped with a second sealing ring 28 for sealing with the outer circular surface of the valve stem 4 and a third sealing ring 29 for sealing with the inner circular surface of the valve neck 10. A fourth sealing ring 30 is sandwiched between the valve cover 2 and the first positioning groove 25. This design ensures the sealing between the valve cover 2 and the valve stem 4, and between the valve cover 2 and the valve body 1, preventing leakage of internal media from between the valve cover 2 and the valve stem 4, and between the valve cover 2 and the valve body 1.

[0035] As attached Figure 2 As shown, the upper end of the valve cover 2 has a packing groove 31 coaxial with the shaft hole 6. Sealing packing 32 is embedded in the packing groove 31. The sealing packing 32 can be made of polytetrafluoroethylene (PTFE). A packing gland 33 is fitted around the outer periphery of the valve stem 4. The packing gland 33 is locked to the upper end of the valve body 1 by fasteners, and the lower end of the packing gland 33 extends into the packing groove 31 to press the sealing packing 32 into the packing groove 31. The fasteners can be bolts. Using packing for secondary sealing ensures that even if the seal between the valve cover 2 and the valve stem 4 fails, the packing seal can still guarantee the seal between the valve cover 2 and the valve stem 4, preventing internal media from leaking to the outside through the gap between them, thus improving the reliability of the sealing structure.

Claims

1. A ball valve with a flushing function, comprising a valve body (1), a valve cover (2), an actuator (3), a valve stem (4), and a ball (5), wherein the valve cover (2) is installed on the upper end of the valve body (1), the valve cover (2) has a shaft hole (6), the valve body (1) has a valve cavity (7), the valve stem (4) passes through the shaft hole (6), and the lower end of the valve stem (4) is linked to the ball (5) disposed in the valve cavity (7), a valve seat (8) is installed in the valve body (1) for forming a sealing fit with the ball (5) when the valve is closed, a bracket (9) is installed on the upper end of the valve body (1), the actuator (3) is installed on the bracket (9), and the output end of the actuator (3) is linked to the upper end of the valve stem (4); characterized in that: The valve body (1) has a valve neck (10) at its upper end. The valve neck (10) has a water inlet hole (11) through it. The outer end of the water inlet hole (11) is threaded with a first screw plug (12). The valve stem (4) has a water inlet channel (13) connected to the water inlet hole (11) and multiple water outlet channels (14) connected to the water inlet channel (13). The multiple water outlet channels (14) are evenly distributed on the outer periphery of the valve stem (4), and the outer end of the water outlet channel (14) is connected to the valve cavity (7). The bottom of the valve body (1) has a drain hole (15) through it. The drain hole (15) is threaded with a hexagonal screw plug (16).

2. A ball valve with flushing function according to claim 1, characterized in that: The water inlet channel (13) includes an annular groove (17) disposed on the outer periphery of the valve stem (4), an axial hole (18) disposed at the center of the valve stem (4) and extending along the axial direction, and a plurality of radial holes (19) arranged in a circumferential array to connect the annular groove (17) and the axial hole (18). The water inlet hole (11) is connected to the annular groove (17), and the water outlet channel (14) is connected to the axial hole (18).

3. A ball valve with flushing function according to claim 2, characterized in that: The axial hole (18) extends upward from the lower end of the valve stem (4), and the lower end of the valve stem (4) is provided with a threaded groove (20) coaxial with the axial hole (18), and a second plug (21) is threadedly connected to the threaded groove (20).

4. A ball valve with flushing function according to claim 1, characterized in that: The water inlet (11) is fitted with an interference fit or welded with a threaded sleeve (22), and the first screw plug (12) is threadedly engaged with the screw sleeve (22).

5. A ball valve with flushing function according to claim 1, characterized in that: A sealing gasket (23) is sandwiched between the outer end of the first screw plug (12) and the outer wall of the valve neck (10).

6. A ball valve with flushing function according to claim 1, characterized in that: A first sealing ring (24) is installed on the outer circular surface of the valve stem (4) at the position above and below the annular groove (17) to form a sealing fit with the inner wall of the valve neck (10).

7. A ball valve with flushing function according to claim 1, characterized in that: The upper end of the valve body (1) is provided with a first positioning groove (25) for the lower half of the valve cover (2) to be embedded, and the lower end of the bracket (9) is provided with a second positioning groove (26) for the upper half of the valve cover (2) to be embedded. The valve cover (2) and the bracket (9) are both locked to the upper end of the valve body (1) by fasteners. The outer periphery of the valve stem (4) is provided with a limiting step (27) that abuts against the lower end of the valve cover (2) to form an axial limiting step.

8. A ball valve with flushing function according to claim 7, characterized in that: The valve cover (2) is equipped with a second sealing ring (28) for sealing with the outer surface of the valve stem (4) and a third sealing ring (29) for sealing with the inner surface of the valve neck (10) on the inner and outer circular surfaces of the valve cover (2). A fourth sealing ring (30) is sandwiched between the valve cover (2) and the first positioning groove (25).

9. A ball valve with flushing function according to claim 8, characterized in that: The valve cover (2) has a packing groove (31) coaxial with the shaft hole (6) at its upper end. The packing groove (31) is filled with sealing packing (32). The valve stem (4) is fitted with a packing gland (33) on its outer periphery. The packing gland (33) is locked to the upper end of the valve body (1) by fasteners. The lower end of the packing gland (33) extends into the packing groove (31) to press the sealing packing (32) into the packing groove (31).

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