control valve

Abstract

The application relates to the technical field of valves, and provides a regulating valve. The regulating valve comprises a valve body, a valve core and a valve rod, a flow channel cavity is formed in the valve body, the flow channel cavity is arranged in extension along a first direction, the valve core is movably arranged in the valve body along the first direction, the valve rod is movably arranged in the valve body along a second direction, the valve core is provided with first inclined teeth, the valve rod is provided with second inclined teeth, the second inclined teeth are arranged in intermeshing and relative sliding with the first inclined teeth, the valve core is driven to move by the valve rod, and the flow area between the valve core and the inner wall of the flow channel cavity is adjusted when the valve core moves towards or away from one of first and second ports. The regulating valve provided by the application can ensure that the position of the valve core is fixed under the action of the valve rod when fluid flows in two directions, the bidirectional conduction effect is ensured, the flow area can be adjusted, and diversified use requirements can be met.

Description

Technical Field

[0001] This application relates to the field of valve technology, and more particularly to a regulating valve. Background Technology

[0002] Most axial flow control valves on the market are unidirectional, with unidirectional regulation and shut-off functions. However, given the diversity of process systems in the domestic natural gas station sector, more and more process systems require control valves with bidirectional regulation and bidirectional shut-off functions. To achieve this function, most process systems use two valves, one for direct and one for indirect operation. While this method can achieve this function, it is costly and has low operating efficiency. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a regulating valve.

[0004] This application provides a regulating valve, comprising:

[0005] A valve body, wherein a flow channel cavity is formed inside the valve body, the flow channel cavity extends along a first direction, and the two ends of the flow channel cavity along the first direction are respectively formed as a first port and a second port;

[0006] The valve core is movably disposed within the valve body along the first direction;

[0007] A valve stem is movably disposed within the valve body in a second direction, which intersects with the first direction;

[0008] The valve core is provided with a first helical tooth, and the valve stem is provided with a second helical tooth. The second helical tooth meshes with the first helical tooth and slides relative to each other, so as to drive the valve core to move through the valve stem. When the valve core moves toward or away from one of the first port and the second port, the flow area between the valve core and the inner wall of the flow channel cavity is adjusted.

[0009] Optionally, the flow channel cavity is formed as a hollow structure with a larger middle and smaller ends along the first direction, so as to reduce the flow area when the valve core moves toward the second port, and to expand the flow area when the valve core moves away from the second port.

[0010] Optionally, the valve body is provided with a fixing part, and a sliding groove is provided in the fixing part extending along the first direction, and the valve core is slidably disposed in the sliding groove along the first direction.

[0011] Optionally, a guide groove is provided extending along the second direction in the valve body, and the valve stem slides through the guide groove. The guide groove communicates with the slide groove so that when the valve stem extends into the slide groove, the second helical tooth on the valve stem can mesh with the first helical tooth on the valve core.

[0012] Optionally, the valve core is provided with a relief groove, the relief groove extends through the valve core along the second direction, the extension length of the relief groove along the first direction is adapted to the sliding stroke of the valve core, the valve stem moves through the relief groove when it is inserted into the sliding groove, and the first helical tooth is located in the relief groove.

[0013] Optionally, the fixing part is provided with a flow channel extending along the first direction, and the flow channel connects the first port and the second port.

[0014] Optionally, a first sealing element is provided between the outer wall surface of the valve core and the inner wall surface of the slide groove.

[0015] Optionally, the regulating valve further includes a valve seat, which is disposed at the second port, and a flow groove is provided inside the valve seat extending along the first direction;

[0016] When the valve core approaches the valve seat along the first direction, it can seal against the inner wall of the flow channel to block the flow cavity and the flow channel. When the valve core moves away from the valve seat along the first direction, it can connect the flow cavity and the flow channel.

[0017] Optionally, a second seal is provided between the outer wall surface of the valve seat and the inner wall surface of the second port.

[0018] Optionally, the regulating valve further includes an actuator connected to the valve stem, and the actuator is configured to drive the valve stem to reciprocate along the second direction, thereby causing the valve core to reciprocate along the first direction.

[0019] The technical solution provided in this application has the following advantages compared with the prior art:

[0020] The regulating valve provided in this application includes a valve body, a valve core, and a valve stem. A flow channel cavity is formed inside the valve body, extending along a first direction. The two ends of the flow channel cavity along the first direction are respectively formed as a first port and a second port. That is, the regulating valve is formed as an axial flow structure, and the flow direction of the fluid is the first direction. The valve core is movably disposed in the valve body along the first direction, and the valve stem is movably disposed in the valve body along a second direction, which intersects with the first direction. A first helical tooth is provided on the valve core, and a second helical tooth is provided on the valve stem. The second helical tooth and the first helical tooth mesh with each other and slide relative to each other. Through the guiding effect between the first helical tooth and the second helical tooth, the valve core can be guided to move in different directions when the valve stem moves. The movement of the valve core is driven by the valve stem. When the valve stem drives the valve core to move toward or away from one of the first port and the second port, the flow area between the valve core and the inner wall of the flow channel cavity can be adjusted. In other words, the direction of valve stem movement is different from the direction of fluid flow. When the valve stem is fixed, even if the fluid flows in both directions, the position of the valve core will not be affected by the fluid and will not move. The flow area inside the valve body is relatively stable, which can ensure the bidirectional conduction effect. At the same time, when the valve core moves under the drive of the valve stem, it can adjust the flow area, thereby realizing flow regulation and meeting diverse usage needs. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a regulating valve according to an embodiment of this application;

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

[0025] In the figure: 1. Valve body; 11. Flow channel cavity; 111. First port; 112. Second port; 12. Fixing part; 121. Slide groove; 122. Flow channel; 13. Guide groove; 2. Valve core; 21. First helical tooth; 22. Circulation groove; 23. First seal; 3. Valve stem; 31. Second helical tooth; 4. Valve seat; 41. Flow groove; 42. Second seal; 5. Actuator. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0028] The regulating valve will be described in detail below through specific embodiments:

[0029] Reference Figure 1 and Figure 2 As shown, some embodiments of this application provide a regulating valve, including a valve body 1, a valve core 2, and a valve stem 3.

[0030] The valve body 1 has a flow channel cavity 11 inside, which extends along a first direction. The two ends of the flow channel cavity 11 along the first direction are respectively formed as a first port 111 and a second port 112. That is, the regulating valve is formed as an axial flow structure and the fluid flows in the first direction.

[0031] The valve core 2 is movably disposed within the valve body 1 along a first direction, and the valve stem 3 is movably disposed within the valve body 1 along a second direction, which intersects with the first direction. The valve core 2 is provided with a first helical tooth 21, and the valve stem 3 is provided with a second helical tooth 31. The second helical tooth 31 meshes with the first helical tooth 21 and slides relative to each other. Through the guiding effect between the first helical tooth 21 and the second helical tooth 31, the valve core 2 can be guided to move in different directions when the valve stem 3 moves.

[0032] In practice, the movement of the valve core 2 is driven by the valve stem 3. When the valve stem 3 moves the valve core 2 toward or away from one of the first port 111 and the second port 112, the flow area between the valve core 2 and the inner wall of the flow channel cavity 11 can be adjusted. That is to say, the movement direction of the valve stem 3 is different from the flow direction of the fluid. When the valve stem 3 is fixed, even if the fluid flows in both directions, the position of the valve core 2 will not be affected by the fluid and will not move. The flow area inside the valve body 1 is relatively stable, which can ensure the bidirectional conduction effect. At the same time, when the valve core 2 moves under the drive of the valve stem 3, it can adjust the flow area, thereby realizing flow regulation and meeting diverse usage needs.

[0033] Specifically, refer to Figure 2As shown, the first helical tooth 21 and the second helical tooth 31 are formed as 45° helical teeth. The valve stem 3 and the valve core 2 are set at 90° to each other. The optimal operating direction is that when the valve stem 3 moves upward, the valve core 2 moves to the left, increasing the flow area; when the valve stem 3 moves downward, the valve core 2 moves to the right, decreasing the flow area. That is to say, the valve stem 3 moving upward is the valve opening action, and during the gradual upward movement, it can gradually increase the flow rate; moving downward is the valve closing action, and during the gradual downward movement, it can gradually decrease the flow rate.

[0034] Of course, the first helical tooth 21 and the second helical tooth 31 can also be formed at other angles. This application does not limit this, and can be adjusted according to the actual size of the regulating valve and other usage scenarios.

[0035] In some embodiments, refer to Figure 1 As shown, the flow channel cavity 11 is formed as a cavity structure with a large middle and small ends along the first direction, so as to reduce the flow area when the valve core 2 moves toward the second port 112, and to expand the flow area when the valve core 2 moves away from the second port 112.

[0036] It is understandable that when the valve core 2 moves toward the second port 112, the cross-section of the flow channel cavity 11 gradually contracts, thus the flow area is gradually compressed, and the total amount of fluid allowed to pass through in the same time decreases; when the valve core 2 moves away from the second port 112, the cross-section of the flow channel cavity 11 gradually increases, thus the flow area is gradually released, and the total amount of fluid allowed to pass through in the same time increases.

[0037] Furthermore, the flow regulation effect can be guaranteed even when the fluid flows in both directions.

[0038] Specifically, the flow channel cavity 11 is symmetrical and streamlined, which ensures that the flow rate will not deviate too much when the fluid flows in both directions, thus ensuring the bidirectional flow function of the axial flow control valve.

[0039] In some embodiments, a fixing part 12 is provided inside the valve body 1, and a sliding groove 121 is provided inside the fixing part 12 extending along a first direction. The valve core 2 is slidably disposed in the sliding groove 121 along the first direction. That is, the sliding groove 121 can guide the valve core 2 to move along the first direction, ensuring the stability of the sliding. Specifically, the fixing part 12 is supported in the central region of the valve body 1, and the valve core 2 can perform a stable sliding action relative to the valve body 1.

[0040] Reference Figure 1 As shown, a guide groove 13 is provided inside the valve body 1 extending along the second direction. The valve stem 3 slides through the guide groove 13 so as to guide the valve stem 3 to slide along the second direction. The guide groove 13 is connected to the slide groove 121 so that when the valve stem 3 extends into the slide groove 121, the second helical tooth 31 on the valve stem 3 can mesh with the first helical tooth 21 on the valve core 2.

[0041] In other words, when the valve stem 3 moves in the second direction, it can extend into the slide groove 121, and the first helical tooth 21 and the second helical tooth 31 can mesh with each other in the slide groove 121, so that the valve core 2 can be driven to move in the first direction by the movement of the valve stem 3 in the second direction.

[0042] Specifically, the guide groove 13 is formed inside the fixed part 12, and the valve stem 3 can perform a stable sliding action relative to the valve body 1 and the fixed part 12.

[0043] In specific implementation, refer to Figure 2 As shown, there are multiple first helical teeth 21 arranged sequentially along the first direction, and multiple second helical teeth 31 arranged sequentially along the second direction. The multiple first helical teeth 21 and multiple second helical teeth 31 are arranged in a cross configuration. When the valve core 2 and the valve stem 3 move relative to each other, the first helical teeth 21 and the second helical teeth 31 can mesh sequentially and slide relative to each other.

[0044] In some embodiments, refer to Figure 2 As shown, the valve core 2 is provided with a relief groove 22, which extends through the valve core 2 along the second direction, so that the valve stem 3 can pass through the relief groove 22 and slide in cooperation with the guide groove 13 on the other side wall of the slide groove 121. It can be understood that the guide groove 13 is provided through the two opposite side walls of the slide groove 121 along the second direction, which can prevent the valve core 2 from exerting too much lateral force on the valve stem 3 when it moves along the first direction, and ensure the straightness of the valve stem 3 when it moves along the second direction.

[0045] The extension length of the clearance groove 22 along the first direction is adapted to the sliding stroke of the valve core 2. When the valve stem 3 extends into the slide groove 121, it moves through the clearance groove 22, and the first helical tooth 21 is located within the clearance groove 22. Specifically, in use, the valve stem 3 can pass through the clearance groove 22 and mesh with the first helical tooth 21. At the same time, when the valve core 2 moves along the first direction, the clearance groove 22 can also avoid the valve stem 3, ensuring the smooth movement of the valve core 2.

[0046] Of course, the extension length of the clearance groove 22 along the first direction can also be longer than the sliding stroke of the valve core 2, as long as it can prevent the valve core 2 from being blocked without lateral obstruction when it moves. This application does not limit this.

[0047] In some embodiments, the fixing part 12 is provided with a flow channel 122 extending in a first direction, the flow channel 122 connecting the first port 111 and the second port 112. With this configuration, fluid flowing in through the first port 111 can reach the second port 112 through the flow channel 122, and fluid flowing in through the second port 112 can reach the first port 111 through the flow channel 122.

[0048] In other words, the fixing part 12 is directly integrally formed with the valve body 1, and the connection between the first port 111 and the second port 112 is achieved through the flow channel 122. The fixing part 12 is fixed in position relative to the valve body 1, so that the valve core 2, which is slidably set in the slide groove 121, can move smoothly to ensure the regulating effect of the regulating valve.

[0049] Reference Figure 2 As shown, a first sealing element 23 is provided between the outer wall surface of the valve core 2 and the inner wall surface of the slide groove 121 to prevent fluid entering the valve body 1 from entering the slide groove 121 and increasing the moving resistance of the valve core 2, thus ensuring the smooth movement of the valve core 2. Specifically, the first sealing element 23 is formed as a sealing ring structure, which can be provided on the outer wall surface of the valve core 2, or on the inner wall surface of the slide groove 121, or simultaneously on both the outer wall surface of the valve core 2 and the inner wall surface of the slide groove 121. Of course, the first sealing element 23 can also be provided on both sides of the clearance groove 22, depending on the actual needs.

[0050] Specifically, the first sealing element 23 can be a rubber sealing ring.

[0051] In some embodiments, refer to Figure 1 As shown, the regulating valve also includes a valve seat 4, which is located at the second port 112. A flow groove 41 is provided inside the valve seat 4 extending along the first direction. When the valve core 2 approaches the valve seat 4 along the first direction, it can seal with the inner wall of the flow groove 41 to block the flow channel cavity 11 and the flow groove 41. When the valve core 2 moves away from the valve seat 4 along the first direction, it can connect the flow channel cavity 11 and the flow groove 41.

[0052] With this configuration, the flow channel cavity 11 inside the valve body 1 can be controlled to open or close through the cooperation between the valve core 2 and the valve seat 4.

[0053] For example, refer to Figure 1 As shown, the valve seat 4 is located at the second port 112. When the valve core 2 moves to the right along the first direction, the valve core 2 can be inserted into the flow groove 41 in the valve seat 4 to achieve a sealing fit. It can isolate the flow groove 41 to disconnect the regulating valve and realize the shut-off function of the regulating valve. When the valve core 2 moves to the left along the first direction, the valve core 2 can disengage from the flow groove 41 in the valve seat 4 to conduct the regulating valve.

[0054] In a specific implementation, a second sealing element 42 is provided between the outer wall surface of the valve seat 4 and the inner wall surface of the second port 112. Specifically, the second sealing element 42 is formed as a sealing ring structure, which can be provided on the outer wall surface of the valve seat 4, on the inner wall surface of the second port 112, or simultaneously on both the outer wall surface of the valve seat 4 and the inner wall surface of the second port 112, depending on actual needs.

[0055] In some embodiments, the control valve further includes an actuator 5 connected to the valve stem 3, and the actuator 5 is configured to drive the valve stem 3 to reciprocate in a second direction, thereby causing the valve core 2 to reciprocate in a first direction. Specifically, the actuator 5 may be an electric push rod, a hydraulic cylinder, a pneumatic cylinder, or other structures that can drive the valve stem 3 to reciprocate in the second direction.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0057] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to these embodiments, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A regulating valve, characterized in that, include: A valve body (1) has a flow channel cavity (11) formed inside the valve body (1). The flow channel cavity (11) extends along a first direction, and the two ends of the flow channel cavity (11) along the first direction are respectively formed as a first port (111) and a second port (112). The valve core (2) is movably disposed within the valve body (1) along the first direction; The valve stem (3) is movably disposed within the valve body (1) along a second direction, which intersects with the first direction; The valve core (2) is provided with a first helical tooth (21), and the valve stem (3) is provided with a second helical tooth (31). The second helical tooth (31) meshes with the first helical tooth (21) and slides relative to each other, so as to drive the valve core (2) to move through the valve stem (3). When the valve core (2) moves toward or away from one of the first port (111) and the second port (112), the flow area between the valve core (2) and the inner wall of the flow channel cavity (11) is adjusted.

2. The regulating valve according to claim 1, characterized in that, The flow channel cavity (11) is formed as a cavity structure that is large in the middle and small at both ends along the first direction, so as to reduce the flow area when the valve core (2) moves toward the second port (112) and to expand the flow area when the valve core (2) moves away from the second port (112).

3. The regulating valve according to claim 1, characterized in that, The valve body (1) is provided with a fixing part (12), and a sliding groove (121) is provided in the fixing part (12) extending along the first direction. The valve core (2) is slidably disposed in the sliding groove (121) along the first direction.

4. The regulating valve according to claim 3, characterized in that, A guide groove (13) is provided inside the valve body (1) extending along the second direction. The valve stem (3) slides through the guide groove (13). The guide groove (13) communicates with the slide groove (121) so that when the valve stem (3) extends into the slide groove (121), the second helical tooth (31) on the valve stem (3) can engage with the first helical tooth (21) on the valve core (2).

5. The regulating valve according to claim 4, characterized in that, The valve core (2) is provided with a relief groove (22), which extends through the valve core (2) along the second direction. The extension length of the relief groove (22) along the first direction is adapted to the sliding stroke of the valve core (2). When the valve stem (3) is inserted into the slide groove (121), it is movably inserted into the relief groove (22). The first helical tooth (21) is located in the relief groove (22).

6. The regulating valve according to claim 3, characterized in that, The fixing part (12) is provided with a flow channel (122) that runs through the first direction, and the flow channel (122) connects the first port (111) and the second port (112).

7. The regulating valve according to claim 3, characterized in that, A first sealing element (23) is provided between the outer wall surface of the valve core (2) and the inner wall surface of the slide groove (121).

8. The regulating valve according to any one of claims 1 to 7, characterized in that, The regulating valve also includes a valve seat (4), which is located at the second port (112). A flow groove (41) is provided inside the valve seat (4) extending along the first direction. When the valve core (2) approaches the valve seat (4) along the first direction, it can seal with the inner wall of the flow groove (41) to block the flow channel cavity (11) and the flow groove (41). When the valve core (2) moves away from the valve seat (4) along the first direction, it can connect the flow channel cavity (11) and the flow groove (41).

9. The regulating valve according to claim 8, characterized in that, A second seal (42) is provided between the outer wall surface of the valve seat (4) and the inner wall surface of the second port (112).

10. The regulating valve according to any one of claims 1 to 7, characterized in that, The regulating valve further includes an actuator (5), which is connected to the valve stem (3) and is configured to drive the valve stem (3) to reciprocate along the second direction, thereby driving the valve core (2) to reciprocate along the first direction.

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