A check ball valve

Abstract

The utility model relates to valve piece technical field especially relates to a check ball valve. The check ball valve includes valve body, valve ball subassembly and check valve core, and the valve body has the fluid channel for the fluid flow in, and the inner wall of fluid channel is provided with first limit structure, valve ball subassembly includes first valve seat and valve ball, and first valve seat is installed in the fluid channel, and first limit structure is used for limiting first valve seat, and valve ball is rotatably arranged in the fluid channel, and is cooperated with first valve seat to open and close fluid channel, check valve core is installed in the fluid channel, and is located the side of first valve seat away from valve ball, and check valve core is configured to only allow fluid to flow from the import end of fluid channel to export end. The check ball valve can avoid the situation that the compression amount of first valve seat is small due to the machining error of check valve core by setting the first limit structure that can limit first valve seat, ensure the sealing effect between first valve seat and valve ball, and avoid the internal leakage of check ball valve.

Description

Technical Field

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

[0002] A check ball valve is a type of valve that automatically opens and closes by relying on the flow of the medium itself. Its core function is to prevent backflow and ensure unidirectional flow of the medium in the pipeline. Due to its advantages such as simple structure, high efficiency and energy saving, and good reliability, check ball valves are widely used in fluid transportation systems.

[0003] A check ball valve typically includes a main valve body, a check valve body, a valve ball, a valve seat, and a check valve core. The main valve body has a first flow channel, and the check valve body is connected to the outlet of the first flow channel. The valve ball and valve seat are both located in the main valve body, and they cooperate to open and close the first flow channel. The check valve core is installed in the check valve body and can selectively open and close the passage between the first and second flow channels, allowing fluid to flow only from the inlet to the outlet of the first flow channel, preventing backflow. However, in related technologies, the check valve core directly abuts against one of the valve seats, meaning the valve seat is compressed between the valve ball and the check valve core. When there are machining errors in the check valve core, it is easy to cause insufficient compression of the valve seat, which in turn affects the sealing fit between the valve ball and the valve seat, thus leading to the risk of internal leakage in the check ball valve.

[0004] Therefore, there is an urgent need for a check ball valve to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a check ball valve that can limit the installation of the valve seat, thereby ensuring the sealing effect between the valve ball and the valve seat and preventing internal leakage of the check ball valve.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A check ball valve, comprising:

[0008] The valve body has a fluid channel for fluid flow, and a first limiting structure is provided on the inner wall of the fluid channel.

[0009] A valve ball assembly includes a first valve seat and a valve ball. The first valve seat is installed in the fluid channel, and the first limiting structure is used to limit the first valve seat. The valve ball is rotatably disposed in the fluid channel and cooperates with the first valve seat to open and close the fluid channel.

[0010] A check valve core, installed in the fluid passage and located on the side of the first valve seat opposite to the valve ball, is configured to allow fluid to flow only from the inlet end to the outlet end of the fluid passage.

[0011] As a preferred embodiment of the check ball valve provided by this utility model, the first limiting structure is a first limiting step surface formed on the inner wall of the fluid channel, and the first limiting step surface abuts against the first valve seat.

[0012] Alternatively, a first annular limiting groove is provided on the inner wall of the fluid channel, and the first limiting structure is a first limiting ring that is detachably installed in the first annular limiting groove, and the first limiting ring abuts against the first valve seat.

[0013] As a preferred embodiment of the check ball valve provided by this utility model, the valve ball assembly further includes an annular gasket, which is located between the first valve seat and the first limiting structure.

[0014] As a preferred embodiment of the check ball valve provided by this utility model, a first sealing element is provided between the annular gasket and the inner wall of the fluid channel.

[0015] As a preferred embodiment of the check ball valve provided by this utility model, the outer periphery of the annular gasket and / or the inner wall of the fluid channel are provided with a receiving groove for accommodating the first sealing element.

[0016] As a preferred embodiment of the check ball valve provided by this utility model, the first valve seat has a first through hole that can communicate with the fluid channel, and the diameter of the first through hole is greater than or equal to the inner diameter of the annular gasket.

[0017] And / or, the first limiting structure is annular, and the inner diameter of the annular gasket is less than or equal to the inner diameter of the first limiting structure.

[0018] As a preferred embodiment of the check ball valve provided by this utility model, the inner wall of the fluid channel is further provided with a second limiting structure, and the end of the check valve core facing away from the first valve seat is limited and abutted against the second limiting structure.

[0019] As a preferred embodiment of the check ball valve provided by this utility model, a second sealing element is provided between the check valve core and the inner wall of the fluid channel.

[0020] As a preferred embodiment of the check ball valve provided by this utility model, the valve body includes a main valve body and a check valve body, one end of the check valve body extends into the main valve body and is sealed to the main valve body;

[0021] The valve ball is rotatably disposed in the main valve body, and the first valve seat and the check valve core are both installed in the check valve body;

[0022] The first limiting structure is disposed on the inner wall of the check valve body and is located between the first valve seat and the check valve core.

[0023] As a preferred embodiment of the check ball valve provided by this utility model, the outer periphery of the check valve body is provided with a limiting protrusion, and the outer end face of the main valve body is limited and abuts against the limiting protrusion.

[0024] The beneficial effects of this utility model are:

[0025] The check ball valve provided by this utility model, through the cooperation between the valve ball and the first valve seat, can realize the opening and closing of the fluid passage of the check ball valve, thereby controlling the fluid flow in the pipeline. By setting a check valve core in the fluid passage, it can be ensured that the fluid can only flow from the inlet end to the outlet end of the fluid passage, thus realizing the unidirectional flow of the fluid in the pipeline. By setting a first limiting structure on the inner wall of the fluid passage to limit the first valve seat, the first valve seat can be limited in its installation, avoiding the situation where the compression of the first valve seat is small due to the machining error of the check valve core, ensuring the sealing effect between the first valve seat and the valve ball, preventing internal leakage of the check ball valve, and ensuring the safety of the check ball valve in use. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the check ball valve provided in this embodiment of the utility model;

[0027] Figure 2 This is a cross-sectional schematic diagram of the check ball valve provided in this embodiment of the utility model;

[0028] Figure 3 This is an exploded schematic diagram of the check ball valve provided in this embodiment of the utility model;

[0029] Figure 4 This is a cross-sectional schematic diagram of the valve body provided in an embodiment of this utility model;

[0030] Figure 5 This is a partial exploded view of the main valve body and regulating assembly provided in this embodiment of the utility model;

[0031] Figure 6 This is a schematic diagram of the valve stem structure provided in an embodiment of the present utility model;

[0032] Figure 7 This is a schematic diagram of the valve cover provided in an embodiment of the present utility model.

[0033] In the picture:

[0034] 10. Valve body; 101. Fluid passage; 1011. Inlet end; 1012. Outlet end; 11. Main valve body; 111. Valve body; 1110. First flow channel; 1111. Third limiting step surface; 1112. Through hole; 112. Protruding neck; 1121. Second locking groove; 1122. Guide groove; 12. Check valve body; 120. Second flow channel; 121. First limiting step surface; 122. Second limiting step surface; 123. Limiting protrusion; 124. Latch structure; 13. Third sealing element;

[0035] 20. Adjusting assembly; 21. Valve stem; 211. Insertion end; 212. Second limiting hole; 22. Valve cover; 221. First limiting hole; 222. Second insertion groove; 223. First locking groove; 224. Fixing hole; 225. Weight reduction groove; 226. Fixing end; 23. Limiting pin; 24. Magnetic pin; 25. Elastic element; 26. Guide pin;

[0036] 30. Valve ball assembly; 31. First valve seat; 310. First through hole; 32. Second valve seat; 320. Second through hole; 33. Valve ball; 331. Third through hole; 332. First insertion groove; 34. Annular gasket; 341. Receiving groove; 35. First seal;

[0037] 40. Check valve core; 401. Second seal;

[0038] 51. Fourth seal; 52. Fifth seal. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] like Figures 1-2 As shown, this embodiment provides a check ball valve, which includes a valve body 10, a valve ball assembly 30, and a check valve core 40. The valve body 10 has a fluid channel 101 for fluid flow, and a first limiting structure is provided on the inner wall of the fluid channel 101. The valve ball assembly 30 includes a first valve seat 31 and a valve ball 33. The first valve seat 31 is installed in the fluid channel 101, and the first limiting structure is used to limit the first valve seat 31. The valve ball 33 is rotatably disposed in the fluid channel 101 and cooperates with the first valve seat 31 to open and close the fluid channel 101. The check valve core 40 is installed in the fluid channel 101 and is located on the side of the first valve seat 31 away from the valve ball 33. The check valve core 40 is configured to allow fluid to flow only from the inlet end 1011 to the outlet end 1012 of the fluid channel 101.

[0043] Specifically, such as Figure 2 and Figure 3 As shown, the valve ball 33 has a third through hole 331, and the first valve seat 31 has a first through hole 310. When the valve ball 33 rotates to the point where the third through hole 331 intersects with the first through hole 310 of the first valve seat 31, and the pressure difference between the inlet end 1011 and the outlet end 1012 of the fluid passage 101 is large, the check valve core 40 can be opened. The check ball valve is in the open state, and fluid can flow from the inlet end 1011 to the outlet end 1012 of the fluid passage 101. As the valve ball 33 rotates, the range of intersection between the third through hole 331 and the first through hole 310 of the first valve seat 31 also changes, and the fluid flow rate through the fluid passage 101 also changes, thereby realizing the control of the pipeline flow rate. When the pressure difference between the inlet end 1011 and the outlet end 1012 of the fluid passage 101 is small and insufficient to open the check valve core 40, the check ball valve is in the first closed state. When the valve ball 33 rotates to the point where the third through hole 331 is misaligned with the first through hole 310 of the first valve seat 31, the check ball valve is also in the second closed state. In addition, when the fluid pressure at the outlet end 1012 is high, the check valve core 40 closes, thereby preventing backflow of fluid and realizing unidirectional flow of fluid in the pipeline.

[0044] In some embodiments, the first valve seat 31 is an annular rubber pad, which can fit tightly with the valve ball 33 through its own deformation, thereby achieving a sealing and resisting relationship between the two. Furthermore, the use of rubber material for the first valve seat 31 can reduce the wear between the two when the valve ball 33 rotates, thereby extending the service life of the check ball valve.

[0045] It should be noted that the specific structure of the check valve core 40 and its one-way check function are technologies well known to those skilled in the art. This embodiment will not elaborate on the specific structure and working principle of the check valve core 40.

[0046] The check ball valve provided in this embodiment, through the cooperation between the valve ball 33 and the first valve seat 31, can realize the opening and closing of the fluid passage 101 of the check ball valve, thereby controlling the flow rate of the fluid in the pipeline. By setting the check valve core 40 in the fluid passage 101, it can be ensured that the fluid can only flow from the inlet end 1011 to the outlet end 1012 of the fluid passage 101, thereby realizing the unidirectional flow of the fluid in the pipeline. By setting a first limiting structure on the inner wall of the fluid passage 101 to limit the first valve seat 31, the first valve seat 31 can be limited in its installation, avoiding the situation where the compression of the first valve seat 31 is small due to the machining error of the check valve core 40, ensuring the sealing effect between the first valve seat 31 and the valve ball 33, preventing internal leakage of the check ball valve, and ensuring the safety of the check ball valve in use.

[0047] Understandably, when the actual axial length of the check valve core 40 is greater than the initial design length, the check valve core 40 will press the first valve seat 31 more tightly against the valve ball 33, resulting in the actual compression of the first valve seat 31 being greater than its designed compression. In this case, the seal between the first valve seat 31 and the valve ball 33 is tighter, and this situation will not cause internal leakage in the check ball valve. When the actual axial length of the check valve core 40 is less than the initial design length, the first valve seat 31 can be accurately installed in the valve body 10 under the limiting action of the first limiting structure, so that the actual compression of the first valve seat 31 is approximately equal to its designed compression, thereby ensuring a good sealing effect between the first valve seat 31 and the valve ball 33 and preventing internal leakage in the check ball valve. In other words, the aforementioned "machining error of the check valve core 40" specifically refers to the situation where the actual axial length of the check valve core 40 is less than the initial design length.

[0048] like Figure 4 and combined Figure 2 As shown, the valve body 10 includes a main valve body 11 and a check valve body 12. One end of the check valve body 12 extends into the main valve body 11 and is sealed to the main valve body 11. The valve ball 33 is rotatably disposed in the main valve body 11. The first valve seat 31 and the check valve core 40 are both installed in the check valve body 12. The first limiting structure is disposed on the inner wall of the check valve body 12 and is located between the first valve seat 31 and the check valve core 40.

[0049] Specifically, the main valve body 11 has a first flow channel 1110, and the check valve body 12 has a second flow channel 120. The first flow channel 1110 and the second flow channel 120 are connected to form the aforementioned fluid passage 101. The end of the first flow channel 1110 away from the check valve body 12 forms an inlet end 1011, and the end of the second flow channel 120 away from the main valve body 11 forms an outlet end 1012. The valve ball 33 cooperates with the first valve seat 31 to open and close the first flow channel 1110, and the check valve core 40 is used to selectively open and close the passage between the first flow channel 1110 and the second flow channel 120.

[0050] In some embodiments, the check valve body 12 is threaded onto the main valve body 11. The threaded connection has the advantages of simple structure, tight connection, and convenient assembly and disassembly.

[0051] In some embodiments, a third sealing element 13 is provided between the main valve body 11 and the check valve body 12 to achieve a sealed connection between the main valve body 11 and the check valve body 12, preventing fluid leakage from the gap between them, thereby ensuring the safety of the check ball valve. The third sealing element 13 is a rubber sealing ring, which provides good sealing performance, is easy to assemble, and is low in cost.

[0052] In some embodiments, a limiting protrusion 123 is provided on the outer periphery of the check valve body 12, and the outer end face of the main valve body 11 abuts against the limiting protrusion 123 to limit the installation of the check valve body 12 and the main valve body 11, so as to avoid the compression of the first valve seat 31 due to excessive or insufficient screwing depth between the check valve body 12 and the main valve body 11, thereby further ensuring the sealing effect between the first valve seat 31 and the valve ball 33.

[0053] In some embodiments, the side of the limiting protrusion 123 facing away from the main valve body 11 is a slope, which gradually slopes towards the main valve body 11 from the direction away from the fluid channel 101. This design can reduce the amount of material used in the limiting protrusion 123 while ensuring the limiting effect of the limiting protrusion 123 on the main valve body 11, thereby reducing the material cost of the check valve body 12.

[0054] like Figure 1 and Figure 2 As shown, the check valve body 12 is provided with a wrench structure 124 to facilitate the operator to apply force to the check valve body 12 using disassembly tools, thereby realizing the quick disassembly and assembly of the check valve body 12 and the main valve body 11.

[0055] like Figures 2-4As shown, in this embodiment, the first limiting structure is a first limiting step surface 121 formed on the inner wall of the fluid channel 101 (specifically the second flow channel 120), which limits and abuts against the first valve seat 31. The first valve seat 31 is compressed between the first limiting step surface 121 and the valve ball 33, thereby ensuring that the compression of the first valve seat 31 will not change due to the machining error of the check valve core 40, thus ensuring a good sealing effect between the first valve seat 31 and the valve ball 33. In addition, by machining the first limiting step surface 121 on the inner wall of the second flow channel 120 to form the first limiting structure, this design is simple in structure, easy to process, and can improve assembly efficiency.

[0056] In other embodiments, a first annular limiting groove is provided on the inner wall of the fluid channel 101 (specifically the second flow channel 120). The first limiting structure is a first limiting ring that is detachably installed in the first annular limiting groove. The first limiting ring and the first valve seat 31 limit and abut against each other. This design can also achieve the above-mentioned effect.

[0057] like Figure 2 and Figure 3 As shown, the valve ball assembly 30 also includes an annular gasket 34, which is located between the first valve seat 31 and the first limiting structure. By providing the annular gasket 34, on the one hand, the annular gasket 34 can fill the gap between the first valve seat 31 and the first limiting structure through its own elastic deformation, thereby ensuring that the first valve seat 31 and the first limiting structure can be in close contact and guarantee the sealing effect between them; on the other hand, the annular gasket 34 can distribute the concentrated pressure over a larger area, thereby reducing local stress concentration and making the force exerted by the first limiting structure on the first valve seat 31 more uniform.

[0058] In some embodiments, the annular gasket 34 is made of a rigid material. Optionally, the rigid material includes, but is not limited to, hard alloys, stainless steel, titanium alloys, etc. Rigid materials have the advantages of high structural strength, good dimensional stability, and corrosion resistance, which can maintain long-term sealing performance and reduce the risk of leakage of the check ball valve.

[0059] In some embodiments, the diameter of the first through hole 310 of the first valve seat 31 is greater than or equal to the inner diameter of the annular gasket 34, so that the first valve seat 31 is completely abutted by the annular gasket 34, further ensuring the uniformity of the force on the first valve seat 31 along its own circumferential direction.

[0060] In some embodiments, the inner diameter of the annular gasket 34 is less than or equal to the inner diameter of the first limiting structure (first limiting step surface 121 or first limiting ring). This design, on the one hand, avoids the inner diameter of the first limiting structure being too small, which could affect the installation of the check valve core 40; on the other hand, it can minimize the wall thickness of the check valve body 12 while ensuring sufficient structural strength, thereby reducing the amount of material used in the check valve body 12 and lowering material costs to a certain extent.

[0061] In some embodiments, a first sealing element 35 is provided between the annular gasket 34 and the inner wall of the fluid channel 101 (specifically, the second flow channel 120). By providing the first sealing element 35, the sealing effect between the annular gasket 34 and the valve body 10 can be further guaranteed, thereby preventing fluid from leaking internally from the gap between the annular gasket 34 and the check valve body 12 when the check ball valve is in the first closed state, further ensuring the safety of the check ball valve during use. The second sealing element 401 is a rubber sealing ring, which has a good sealing effect, is easy to assemble, and is low in cost.

[0062] In this embodiment, the outer periphery of the annular gasket 34 is provided with a receiving groove 341 for accommodating the first sealing element 35. The receiving groove 341 can limit the installation of the first sealing element 35 to prevent the first sealing element 35 from shifting relative to the annular gasket 34 during the operation of the check ball valve, thus affecting the sealing effect.

[0063] Of course, in other embodiments, the receiving groove 341 can also be formed on the inner wall of the valve body 10 (specifically the stop valve body 12); or, the receiving groove 341 can be formed on both the outer periphery of the annular gasket 34 and the inner wall of the valve body 10 (specifically the stop valve body 12), and the two together accommodate the first sealing member 35. Both of these design methods can achieve the above-mentioned effect.

[0064] like Figure 2 and Figure 4 As shown, the inner wall of the fluid channel 101 is also provided with a second limiting structure, and the end of the check valve core 40 facing away from the first valve seat 31 is limited and abutted against the second limiting structure. That is to say, the check valve core 40 is axially limited between the annular gasket 34 and the second limiting structure, thereby realizing the precise installation of the check valve core 40.

[0065] In this embodiment, the second limiting structure is a second limiting step surface 122 formed on the inner wall of the fluid channel 101 (specifically the second flow channel 120). The second limiting step surface 122 and the check valve core 40 limit and abut against each other. The structure is simple, easy to process, and can improve assembly efficiency.

[0066] In other embodiments, a second annular limiting groove is provided on the inner wall of the fluid channel 101 (specifically the second flow channel 120). The second limiting structure is a second limiting ring that is detachably installed in the second annular limiting groove. The second limiting ring is limited and resisted by the check valve core 40. This design can also achieve the above-mentioned effect.

[0067] In some embodiments, a second seal 401 is provided between the check valve core 40 and the inner wall of the fluid passage 101. The second seal 401 ensures the sealing performance between the outer periphery of the check valve core 40 and the check valve body 12, preventing fluid leakage from the gap between the check valve core 40 and the check valve body 12, further ensuring the safety of the check ball valve. The second seal 401 is a rubber sealing ring, which provides good sealing performance, is easy to assemble, and is low in cost.

[0068] like Figure 2 and Figure 3 As shown, the valve ball assembly 30 also includes a second valve seat 32. The first valve seat 31 and the second valve seat 32 are located on both sides of the valve ball 33, and both are in sealing fit with the valve ball 33. Specifically, the second valve seat 32 has a second through hole 320. As the valve ball 33 rotates, when one end of the third through hole 331 of the valve ball 33 is directly opposite to the first through hole 310 of the first valve seat 31, the other end of the third through hole 331 of the valve ball 33 is directly opposite to the second through hole 320 of the second valve seat 32. At this time, the fluid flow of the check ball valve is at its maximum. When one end of the third through hole 331 of the valve ball 33 is completely misaligned from the first through hole 310 of the first valve seat 31, the other end of the third through hole 331 of the valve ball 33 is also completely misaligned from the second through hole 320 of the second valve seat 32. At this time, the check ball valve is in the second closed state, and the fluid flow is zero. By setting a first valve seat 31 and a second valve seat 32 that can simultaneously seal and cooperate with the valve ball 33, the uniformity of force on the valve ball 33 can be ensured, thereby achieving a good sealing effect.

[0069] In some embodiments, the inner wall of the main valve body 11 is provided with a third limiting step surface 1111, and the end of the second valve seat 32 facing away from the valve ball 33 is limited and abutted against the third limiting step surface 1111. That is, the second valve seat 32 is compressed between the third limiting step surface 1111 and the valve ball 33, thereby ensuring a good sealing effect between the second valve seat 32 and the valve ball 33.

[0070] It needs to be explained that, such as Figure 2 As shown, in this embodiment, the check valve core 40 is installed downstream of the valve ball assembly 30. In other embodiments, the check valve core 40 can also be installed upstream of the valve ball assembly 30, achieving the same check function. When the check valve core 40 is installed downstream of the valve ball assembly 30, Figure 2The valve seat located on the right side (i.e., near the inlet end 1011) is the first valve seat 31, and the valve seat located on the left side (i.e., near the outlet end 1012) is the second valve seat 32; when the check valve core 40 is installed upstream of the valve ball assembly 30, Figure 2 The valve seat located on the left side (i.e., near the outlet end 1012) is the first valve seat 31, and the valve seat located on the right side (i.e., near the inlet end 1011) is the second valve seat 32.

[0071] Figure 5 and combined Figure 2 , Figure 3 As shown, the check ball valve also includes an adjusting assembly 20. The main valve body 11 includes a valve body 111 and a protruding neck 112. A through hole 1112 is provided on the top of the valve body 111. The protruding neck 112 is connected to the valve body 111 and surrounds the through hole 1112. A first flow channel 1110 is formed inside the valve body 111. The adjusting assembly 20 includes a valve stem 21 and a valve cover 22. One end of the valve stem 21 passes through the protruding neck 112 and the through hole 1112 in sequence and is connected to the valve ball 33. The valve cover 22 is fitted on the protruding neck 112 and is connected to the other end of the valve stem 21. Rotating the valve cover 22 can drive the valve stem 21 to rotate synchronously, thereby realizing the rotation of the valve ball 33 to open and close the fluid channel 101.

[0072] In some embodiments, the valve stem 21 and the valve ball 33 are interlocked to ensure that the valve ball 33 can rotate synchronously with the valve stem 21. Specifically, as shown in... Figure 3 and Figure 6 As shown, in this embodiment, the valve stem 21 is provided with a plug end 211, and the valve ball 33 is provided with a first plug groove 332 that mates with the plug end 211. In other embodiments, the plug end 211 can also be provided on the valve ball 33, and the first plug groove 332 can be provided on the valve stem 21, achieving the same effect.

[0073] In some embodiments, the valve stem 21 is inserted into the valve cover 22 to ensure that the valve stem 21 rotates synchronously with the valve cover 22. Specifically, as shown in... Figures 5-7 As shown, in this embodiment, a second insertion groove 222 is provided inside the valve cover 22, and the end of the valve stem 21 facing away from the valve ball 33 is inserted into the second insertion groove 222, thereby achieving a fixed connection between the valve stem 21 and the valve cover 22. In other embodiments, the second insertion groove 222 can also be provided on the valve stem 21, and an insertion protrusion that can be inserted and cooperate with the second insertion groove 222 can be provided inside the valve cover 22, which can achieve the same effect.

[0074] Continue as Figures 5-7 and combined Figure 2As shown, the adjustment assembly 20 also includes a limiting pin 23. The valve cover 22 is provided with a first limiting hole 221, and the valve stem 21 is provided with a second limiting hole 212 corresponding to the first limiting hole 221. The limiting pin 23 is sequentially inserted into the first limiting hole 221 and the second limiting hole 212 to limit the installation between the valve cover 22 and the protruding neck 112, so as to prevent the valve cover 22 from coming off along the axial direction of the protruding neck 112 during rotation, which would affect the position adjustment of the valve ball 33.

[0075] In some embodiments, at least one fourth seal 51 is provided between the valve stem 21 and the protruding neck 112 to ensure the sealing between the two, thereby preventing fluid in the first flow channel 1110 from leaking between the valve stem 21 and the protruding neck 112. It should be noted that the fourth seal 51 is an O-ring. O-rings have a simple structure, low price, corrosion resistance, and good sealing effect.

[0076] In some embodiments, a fifth sealing element 52 is provided between the valve cover 22 and the protruding neck 112 to ensure the sealing performance between the valve cover 22 and the protruding neck 112. The fifth sealing element 52 serves two purposes: firstly, its elastic force ensures a stable fit between the valve cover 22 and the protruding neck 112; secondly, it works in conjunction with the fourth sealing element 51 to provide a double seal between the regulating assembly 20 and the main valve body 11, further ensuring the sealing performance and operational safety of the check ball valve.

[0077] like Figure 2 , Figure 5 and Figure 7 As shown, the adjustment assembly 20 also includes a magnetic pin 24 and an elastic element 25. A first locking groove 223 is provided in the valve cover 22, and a second locking groove 1121 corresponding to the first locking groove 223 is provided on the protruding neck 112. The magnetic pin 24 is movably disposed in the first locking groove 223. The two ends of the elastic element 25 abut against the first locking groove 223 and the magnetic pin 24 respectively. The magnetic pin 24 can partially extend into the second locking groove 1121 under the elastic action of the elastic element 25, and can be completely accommodated in the first locking groove 223 under the action of external magnetic force.

[0078] Specifically, when no external magnetic force is applied, the magnetic pin 24 extends partially into the second locking groove 1121 under the elastic action of the elastic element 25. That is, the magnetic pin 24 is simultaneously housed in both the first locking groove 223 and the second locking groove 1121, thus locking the valve cover 22 to the main valve body 11. At this time, the valve cover 22 cannot rotate relative to the main valve body 11, thereby ensuring the anti-theft capability of the check ball valve. When an external magnetic force is applied, the magnetic pin 24 overcomes the elastic action of the elastic element 25 and is fully housed in the first locking groove 223. At this time, the valve cover 22 can rotate freely relative to the main valve body 11, simultaneously driving the valve stem 21 and the valve ball 33 to rotate, thereby controlling the fluid flow rate.

[0079] In some embodiments, there are two second locking slots 1121, each spaced circumferentially along the neck 112. When one of the second locking slots 1121 is directly opposite the first locking slot 223, the check ball valve is in the open state; when the other second locking slot 1121 is directly opposite the first locking slot 223, the check ball valve is in the second closed state. This design further ensures the safety of the check ball valve, meaning that it has a locking function regardless of its state.

[0080] In some embodiments, the adjusting assembly 20 further includes a guide pin 26, a fixing hole 224 is provided in the valve cover 22, and a guide groove 1122 is provided on the top surface of the protruding neck 112. One end of the guide pin 26 is fixed in the fixing hole 224, and the other end of the guide pin 26 is guided and fitted in the guide groove 1122. The guide groove 1122 extends circumferentially along the protruding neck 112, and the central angle of the guide groove 1122 is equal to the central angle between the two second locking grooves 1121. When the valve cover 22 rotates relative to the main valve body 11 until the guide pin 26 abuts against one side of the guide groove 1122, one of the second locking grooves 1121 is directly opposite the first locking groove 223; when the valve cover 22 rotates relative to the main valve body 11 until the guide pin 26 abuts against the other side of the guide groove 1122, the other second locking groove 1121 is directly opposite the first locking groove 223. By setting the guide pin 26 and the guide groove 1122, the rotation of the valve cover 22 can be reminded to be in place. That is, when the guide pin 26 abuts against a certain groove wall of the guide groove 1122, the valve cover 22 is rotated into place. At this time, the external magnetic attraction can be canceled, and the magnetic pin 24 can be inserted into the corresponding second locking groove 1121 under the elastic action of the elastic element 25, so as to realize the locking function of the check ball valve.

[0081] In some embodiments, the check ball valve also includes a magnetic key (not shown), which provides external magnetic force to the magnetic pin 24, and the operator can rotate the magnetic key to rotate the valve cover 22.

[0082] In some embodiments, a fixed end 226 is provided on the top of the valve cover 22, and a fixing groove is provided on the magnetic key to engage with the fixed end 226, thereby achieving a fixed connection between the valve cover 22 and the magnetic key, and ensuring that the valve cover 22 can rotate synchronously with the magnetic key. In this embodiment, the cross-sectional shape of the fixed end 226 is a pentagonal structure, and the shape of the fixing groove is adapted to the shape of the fixed end 226. In other embodiments, the cross-sectional shape of the fixed end 226 can also be set as a non-circular structure such as a triangle, quadrilateral, hexagon, or ellipse. This embodiment does not limit this, as long as it ensures that the valve cover 22 and the magnetic key can be fixedly connected and that relative rotation between the two is avoided.

[0083] It should be noted that magnetic keys are a technology well known to those skilled in the art, and the specific structure of the magnetic key will not be described in detail in this embodiment.

[0084] In some embodiments, the valve cover 22 is also provided with a weight reduction groove 225, which can reduce the weight of the check ball valve and improve its ease of use; on the other hand, it can also save material costs.

[0085] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A check ball valve, characterized in that, include: The valve body (10) has a fluid channel (101) for fluid flow, and a first limiting structure is provided on the inner wall of the fluid channel (101). The valve ball assembly (30) includes a first valve seat (31) and a valve ball (33). The first valve seat (31) is installed in the fluid channel (101), and the first limiting structure is used to limit the first valve seat (31). The valve ball (33) is rotatably disposed in the fluid channel (101) and cooperates with the first valve seat (31) to open and close the fluid channel (101). A check valve core (40) is installed in the fluid passage (101) and located on the side of the first valve seat (31) away from the valve ball (33). The check valve core (40) is configured to allow fluid to flow only from the inlet end (1011) of the fluid passage (101) to its outlet end (1012).

2. The check ball valve according to claim 1, characterized in that, The first limiting structure is a first limiting step surface (121) formed on the inner wall of the fluid channel (101), and the first limiting step surface (121) and the first valve seat (31) limit and abut against each other; Alternatively, a first annular limiting groove is provided on the inner wall of the fluid channel (101), and the first limiting structure is a first limiting ring that is detachably installed in the first annular limiting groove, and the first limiting ring is limited and abutted against the first valve seat (31).

3. The check ball valve according to claim 1, characterized in that, The valve ball assembly (30) also includes an annular gasket (34) located between the first valve seat (31) and the first limiting structure.

4. The check ball valve according to claim 3, characterized in that, A first seal (35) is provided between the annular gasket (34) and the inner wall of the fluid channel (101).

5. The check ball valve according to claim 4, characterized in that, The outer periphery of the annular gasket (34) and / or the inner wall of the fluid channel (101) are provided with receiving grooves (341) for accommodating the first seal (35).

6. The check ball valve according to claim 3, characterized in that, The first valve seat (31) has a first through hole (310) that can communicate with the fluid channel (101), and the diameter of the first through hole (310) is greater than or equal to the inner diameter of the annular gasket (34); And / or, the first limiting structure is annular, and the inner diameter of the annular gasket (34) is less than or equal to the inner diameter of the first limiting structure.

7. The check ball valve according to claim 1, characterized in that, The inner wall of the fluid channel (101) is also provided with a second limiting structure, and the end of the check valve core (40) away from the first valve seat (31) is limited and abutted against the second limiting structure.

8. The check ball valve according to claim 1, characterized in that, A second seal (401) is provided between the check valve core (40) and the inner wall of the fluid channel (101).

9. The check ball valve according to any one of claims 1 to 8, characterized in that, The valve body (10) includes a main valve body (11) and a check valve body (12). One end of the check valve body (12) extends into the main valve body (11) and is sealed to the main valve body (11). The valve ball (33) is rotatably disposed in the main valve body (11), and the first valve seat (31) and the check valve core (40) are both installed in the check valve body (12); The first limiting structure is disposed on the inner wall of the check valve body (12) and is located between the first valve seat (31) and the check valve core (40).

10. The check ball valve according to claim 9, characterized in that, The outer periphery of the check valve body (12) is provided with a limiting protrusion (123), and the outer end face of the main valve body (11) is limited and abuts against the limiting protrusion (123).

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