A regulating valve

Abstract

The utility model belongs to valve technical field discloses a regulating valve, and the both sides of valve body along first direction are equipped with inlet chamber and outlet chamber respectively, and the inside of valve body is equipped with the flow channel chamber of intercommunication inlet chamber and outlet chamber, and the valve seat is installed in the outlet chamber, and the inside of valve body is equipped with the sliding slot along first direction, and the valve core is slidably installed in the sliding slot, and the outer wall surface of valve core is divided into sealing surface and throttling surface along first direction, and the groove wall of sliding slot installs main sealing piece, and main sealing piece is clamped in sealing surface and sliding slot groove wall circumferentially, and the valve rod is movably arranged in the inside of valve body, and the valve rod drives the valve core to slide in the sliding slot, and throttling surface extends into flow channel chamber when the valve core slides towards the outlet chamber, and the end of valve core seals with the valve seat, through dividing the outer wall surface of valve core into sealing surface and throttling surface along first direction, sealing surface does not receive medium pressure and medium scouring, and will not produce deformation, main sealing piece seals and protects sealing surface all the time, and then keeps the sealing cooperation of valve core and valve body, prevents the sealed failure from appearing, prolongs the service life of valve.

Description

Technical Field

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

[0002] Control valves are terminal control elements in industrial process control systems. They are typically used to regulate the flow parameters of fluid media. Based on the signal output by the controller, the valve opening is automatically changed, thereby regulating the flow parameters of the fluid media in the process.

[0003] In pursuit of compact structure and low cost, current control valves on the market typically have relatively short valve cores. The outer circumference of the valve core serves as both a sealing surface and a throttling surface for regulating functions. Under conditions where the valve core is subjected to long-term media erosion, the outer circumference of the valve core is prone to deformation, leading to internal leakage and sealing failure, which greatly reduces the service life of the valve. Utility Model Content

[0004] The purpose of this invention is to provide a regulating valve that can prevent valve core sealing failure and extend service life.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A regulating valve includes a valve body, a valve seat, a valve core, a main seal, and a valve stem. The valve body has an inlet and an outlet on both sides along a first direction. A flow channel cavity is provided inside the valve body, connecting the inlet and outlet. The valve seat is installed in the outlet and its outer wall is circumferentially sealed to the cavity wall of the outlet. The valve seat and the valve core are coaxially arranged. A sliding groove is provided inside the valve body along the first direction, with one end of the groove near the outlet communicating with the flow channel cavity. The valve core is slidably installed in the sliding groove. The outer wall surface of the valve core is divided into a sealing surface and a throttling surface along the first direction. The main seal is installed on the groove wall of the sliding groove, circumferentially sandwiched between the sealing surface and the groove wall. The valve stem is movably disposed inside the valve body, driving the valve core to slide within the sliding groove. When the valve core slides towards the outlet, the throttling surface extends into the flow channel cavity, and the end of the valve core seals with the valve seat.

[0007] Preferably, the regulating valve further includes an auxiliary seal, which is installed on the groove wall of the slide and spaced apart from the main seal, and is circumferentially sandwiched between the throttling surface and the groove wall of the slide.

[0008] Preferably, the length of the sealing surface in the first direction is greater than the length of the throttling surface in the first direction.

[0009] Preferably, the valve stem is movably disposed inside the valve body along the second direction, the first direction intersects the second direction, the valve core is connected to the first helical rack, and the valve stem is connected to the second helical rack. The first helical rack and the second helical rack mesh and slide together. The movement of the valve stem along the second direction causes the valve core to slide along the first direction.

[0010] Preferably, the first direction is perpendicular to the second direction, and the teeth of the first helical rack and the teeth of the second helical rack are both inclined at 45°.

[0011] Preferably, the valve body has a guide groove along the second direction, and one end of the guide groove extends to the outer wall of the valve body, the other end of the guide groove is connected to the slide groove, and the valve stem is movably disposed in the guide groove.

[0012] Preferably, the valve core is provided with a through groove along the second direction, the guide groove is connected to the through groove, and the first helical rack is installed in the through groove, and the valve stem drives the second helical rack to extend into the through groove.

[0013] Preferably, the regulating valve further includes an actuator mounted on the valve body and driven by the valve stem, the actuator being configured to drive the valve stem to move.

[0014] The beneficial effects of this utility model are:

[0015] This utility model provides a regulating valve, including a valve body, a valve seat, a valve core, a main seal, and a valve stem. The valve body has an inlet and an outlet chamber on both sides along a first direction. A flow channel cavity is provided inside the valve body, connecting the inlet and outlet chambers. The valve seat is installed in the outlet chamber, and its outer wall circumferentially seals the cavity wall of the outlet chamber. The valve seat and valve core are coaxially arranged. A sliding groove is provided inside the valve body along the first direction, with one end of the groove near the outlet chamber connecting to the flow channel cavity. The valve core is slidably installed in the sliding groove. The outer wall surface of the valve core is divided into a sealing surface and a throttling surface along the first direction. The main seal is installed on the groove wall of the sliding groove. The valve stem is movably positioned inside the valve body, sandwiched between the sealing surface and the groove wall. The valve stem drives the valve core to slide within the groove. When the valve core slides towards the outlet, the throttling surface extends into the flow channel cavity, and the end of the valve core seals against the valve seat. This invention divides the outer wall of the valve core into a sealing surface and a throttling surface along a first direction. The sealing surface is not subjected to medium pressure or erosion, thus preventing deformation. The main sealing element can always seal and protect the sealing surface, thereby maintaining a tight seal between the valve core and the valve body, preventing internal leakage of the valve body, preventing seal failure, and extending the service life of the valve. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of the regulating valve provided in this embodiment of the utility model;

[0017] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0018] In the picture:

[0019] 1. Valve body; 11. Inlet chamber; 12. Outlet chamber; 13. Flow channel cavity; 14. Mounting part; 141. Slide groove; 142. Through groove; 15. Guide groove; 2. Valve seat; 3. Valve core; 31. Sealing surface; 32. Throttling surface; 33. Through groove; 4. Valve stem; 5. Actuator; 6. Main seal; 7. Auxiliary seal; 8. First helical rack; 9. Second helical rack. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0021] 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, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to 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 based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly 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.

[0023] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0024] In pursuit of compact structure and low cost, current control valves on the market typically have relatively short valve cores. The outer circumference of the valve core serves as both a sealing surface and a throttling surface for regulating the valve opening. Under conditions where the valve is subjected to long-term media erosion, the outer circumference of the valve core is prone to deformation, leading to internal leakage in the valve body and sealing failure, which greatly reduces the service life of the valve.

[0025] Therefore, this embodiment provides a regulating valve with an extended valve core. Part of the outer wall surface of the valve core is not subjected to medium pressure and erosion, thus preventing deformation. This ensures that the valve core and valve body maintain a tight seal, preventing internal leakage and sealing failure, and extending the valve's service life.

[0026] Please see Figure 1 The regulating valve provided in this embodiment includes a valve body 1, a valve seat 2, a valve core 3, and a valve stem 4. The valve seat 2 is installed on the valve body 1, the valve core 3 is slidably disposed inside the valve body 1, and the valve stem 4 is movably disposed inside the valve body 1. The valve stem 4 drives the valve core 3 to slide inside the valve body 1, thereby making the valve core 3 and the valve seat 2 seal together to close the valve, or making the valve core 3 disengage from the valve seat 2 to open the valve and adjust the valve opening by controlling the sliding stroke of the valve core 3.

[0027] For example, the regulating valve provided in this embodiment also includes an actuator 5, which is mounted on the valve body 1 and driven to the valve stem 4. The actuator 5 is configured to drive the valve stem 4 to move.

[0028] Specifically, please refer to Figure 1 The valve body 1 has an inlet cavity 11 and an outlet cavity 12 on both sides along the first direction. Optionally, the valve body 1 selected in this embodiment is an axial flow structure, that is, the inlet cavity 11 and the outlet cavity 12 are arranged opposite to each other, and the valve body 1 has a flow channel cavity 13 inside, which connects the inlet cavity 11 and the outlet cavity 12. The medium enters the flow channel cavity 13 from the inlet cavity 11 and can flow into the outlet cavity 12 from the flow channel cavity 13.

[0029] Furthermore, the valve seat 2 is installed on the outlet cavity 12, and its outer wall is circumferentially sealed to the cavity wall of the outlet cavity 12. Preferably, the valve seat 2 is bolted to the cavity wall of the outlet cavity 12. It can be understood that in this embodiment, the valve seat 2 and the valve core 3 are coaxially arranged.

[0030] For example, a sealing ring is installed on the cavity wall of the outlet cavity 12. The sealing ring is circumferentially clamped between the cavity wall of the outlet cavity 12 and the outer wall of the valve seat 2 to achieve a sealing fit between the valve seat 2 and the outlet cavity 12.

[0031] Furthermore, the valve body 1 has a groove 141 inside along the first direction. The end of the groove 141 near the outlet cavity 12 is connected to the flow channel cavity 13. The valve core 3 is slidably installed in the groove 141. The valve stem 4 drives the valve core 3 to slide in the groove 141 along the first direction. When the valve core 3 slides toward the outlet cavity 12, the end of the valve core 3 seals and engages with the valve seat 2, blocking the connection between the flow channel cavity 13 and the outlet cavity 12, that is, closing the valve. When the valve core 3 slides away from the outlet cavity 12, the end of the valve core 3 disengages from the valve seat 2, and the flow channel cavity 13 connects with the outlet cavity 12, that is, opening the valve.

[0032] It should be noted that the flow channel cavity 13 is a hollow structure with a larger middle and smaller ends along the first direction. Starting from the end of the valve core 3 separating from the valve seat 2, the valve core 3 slides away from the outlet cavity 12, the flow area formed by the outer wall surface of the valve core 3 and the flow channel cavity 13 expands, and the valve opening increases. Continuing, the valve core 3 slides towards the outlet cavity 12, the flow area formed by the outer wall surface of the valve core 3 and the flow channel cavity 13 shrinks, and the valve opening decreases.

[0033] In some embodiments, a mounting portion 14 is fixedly provided inside the valve body 1. The mounting portion 14 is located in the central region of the valve body 1 and within the flow channel cavity 13. A slide groove 141 is formed in the mounting portion 14 along a first direction. That is, the mounting portion 14 is integrally formed with the valve body 1. The fixed portion is fixed relative to the position of the valve body 1. The valve core 3 provided in the slide groove 141 can slide smoothly to ensure the regulating effect of the regulating valve.

[0034] Further, please refer to Figure 1 The main sealing element 6 and the auxiliary sealing element 7 are installed at intervals on the cavity wall of the slide groove 141. The main sealing element 6 and the auxiliary sealing element 7 are circumferentially sandwiched between the outer wall of the valve core 3 and the groove wall of the slide groove 141 to ensure the sealing effect of the valve core 3. Preferably, the cavity wall of the slide groove 141 is provided with two annular grooves at intervals, and the main sealing element 6 and the auxiliary sealing element 7 are respectively embedded in the two annular grooves.

[0035] Optionally, both the main seal 6 and the auxiliary seal 7 may be made of sealing rings.

[0036] Please see Figure 1 and Figure 2In this embodiment, the outer wall surface of the valve core 3 is divided into a sealing surface 31 and a throttling surface 32 along the first direction. At the same time, an auxiliary sealing element 7 is provided that is closer to the outlet cavity 12 than the main sealing element 6. The main sealing element 6 is always circumferentially clamped between the sealing surface 31 and the groove wall of the slide groove 141, and the auxiliary sealing element 7 is always circumferentially clamped between the throttling surface 32 and the groove wall of the slide groove 141. When the valve stem 4 drives the valve core 3 to slide toward the outlet cavity 12, the throttling surface 32 extends into the flow channel cavity 13, and the sealing surface 31 is always located in the slide groove 141.

[0037] In this embodiment, by extending the valve core 3, a sealing surface 31 and a throttling surface 32 are designed on the outer circumferential surface of the valve core 3. Only the throttling surface 32 is subjected to medium pressure and medium erosion during use, while the sealing surface 31 is not subjected to medium erosion, thereby reducing the risk of deformation of the sealing surface 31. This ensures that the main sealing element 6 can always seal and protect the sealing surface 31, avoid valve core 3 sealing failure, and extend the service life of the valve.

[0038] With the above settings, when the throttling surface 32 of the valve core 3 is undamaged, the auxiliary seal 7 seals the throttling surface 32 of the valve core 3, and the main seal 6 provides redundant protection. When the throttling surface 32 of the valve core 3 is damaged, the auxiliary seal 7 fails to seal the throttling surface 32 of the valve core 3, and the main seal 6 seals the sealing surface 31 of the valve core 3, providing the main sealing function for the valve core 3. At this time, the auxiliary seal 7 assists in blocking impurities.

[0039] Preferably, in this embodiment, the length of the sealing surface 31 in the first direction is greater than the length of the throttling surface 32 in the first direction.

[0040] In this embodiment, the valve stem 4 is movably disposed inside the valve body 1 along the second direction, and the actuator 5 is configured to drive the valve stem 4 to move along the second direction.

[0041] Specifically, the first direction intersects with the second direction; please refer to [link / reference]. Figure 1 and Figure 2 The valve core 3 is connected to the first helical rack 8, and the valve stem 4 is connected to the second helical rack 9. The first helical rack 8 and the second helical rack 9 mesh and slide together. The actuator 5 drives the valve stem 4 to move in the second direction, and then drives the first helical rack 8 and the valve core 3 to slide in the first direction through the second helical rack 9.

[0042] In this embodiment, the first direction is perpendicular to the second direction, and the teeth of the first helical rack 8 and the second helical rack 9 are both inclined at 45°. In other feasible embodiments, the intersection angle of the first direction and the second direction can be set to other values, and the inclination angles of the teeth of the first helical rack 8 and the second helical rack 9 can be configured accordingly to achieve meshing and sliding engagement.

[0043] For further information, please refer to [link / reference]. Figure 1 and Figure 2 The valve core 3 has a through groove 33 extending along the second direction, the mounting part 14 has a through groove 142 extending along the second direction, and the valve body 1 has a guide groove 15 extending along the second direction. The guide groove 15 communicates with the through groove 142, the sliding groove 141, and the through groove 33. One end of the guide groove 15 extends to the outer wall of the valve body 1 and is directly opposite the actuator 5. In this embodiment, the valve stem 4 is movably disposed in the guide groove 15, the first helical rack 8 is installed in the through groove 33, and the second helical rack 9 is connected to the end of the valve stem 4. The actuator 5 drives the valve stem 4 to drive the second helical rack 9 to extend into the through groove 33 and engage with the first helical rack 8 and slide.

[0044] It should be noted that in this embodiment, the sealing surface 31 and the throttling surface 32 are located on the same side of the through groove 33.

[0045] 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 various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments 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 regulating valve, characterized in that, The valve body (1) includes a valve body (1), a valve seat (2), a valve core (3), a valve stem (4), and a main seal (6). The valve body (1) has an inlet chamber (11) and an outlet chamber (12) on both sides along a first direction. A flow channel cavity (13) is provided inside the valve body (1), connecting the inlet chamber (11) and the outlet chamber (12). The valve seat (2) is installed in the outlet chamber (12), and its outer wall is circumferentially sealed to the cavity wall of the outlet chamber (12). The valve seat (2) and the valve core (3) are coaxially arranged. A sliding groove (141) is provided inside the valve body (1) along the first direction, with one end of the sliding groove (141) near the outlet chamber (12) connecting to the flow channel cavity (11). 3) The valve core (3) is slidably installed in the slide groove (141). The outer wall surface of the valve core (3) is divided into a sealing surface (31) and a throttling surface (32) along the first direction. The main sealing element (6) is installed on the groove wall of the slide groove (141). The main sealing element (6) is circumferentially sandwiched between the sealing surface (31) and the groove wall of the slide groove (141). The valve stem (4) is movably disposed inside the valve body (1). The valve stem (4) drives the valve core (3) to slide in the slide groove (141). When the valve core (3) slides toward the outlet cavity (12), the throttling surface (32) extends into the flow channel cavity (13). The end of the valve core (3) is sealed and fitted with the valve seat (2).

2. The regulating valve according to claim 1, characterized in that, The regulating valve also includes an auxiliary seal (7), which is installed on the groove wall of the slide (141) and spaced apart from the main seal (6). The auxiliary seal (7) is circumferentially sandwiched between the throttling surface (32) and the groove wall of the slide (141).

3. A regulating valve according to claim 1, characterized in that, The length of the sealing surface (31) in the first direction is greater than the length of the throttling surface (32) in the first direction.

4. A regulating valve according to claim 1, characterized in that, The valve stem (4) is movably disposed inside the valve body (1) along the second direction. The first direction intersects the second direction. The valve core (3) is connected to the first helical rack (8). The valve stem (4) is connected to the second helical rack (9). The first helical rack (8) and the second helical rack (9) mesh and slide together. The movement of the valve stem (4) along the second direction causes the valve core (3) to slide along the first direction.

5. A regulating valve according to claim 4, characterized in that, The first direction is perpendicular to the second direction, and the teeth of the first helical rack (8) and the teeth of the second helical rack (9) are both inclined at 45°.

6. A regulating valve according to claim 4, characterized in that, The valve body (1) has a guide groove (15) along the second direction, and one end of the guide groove (15) extends to the outer wall of the valve body (1), and the other end of the guide groove (15) is connected to the slide groove (141). The valve stem (4) is movably disposed in the guide groove (15).

7. A regulating valve according to claim 6, characterized in that, The valve core (3) is provided with a through groove (33) along the second direction, the guide groove (15) is connected to the through groove (33), and the first helical rack (8) is installed in the through groove (33). The valve stem (4) drives the second helical rack (9) to extend into the through groove (33).

8. A regulating valve according to any one of claims 1-7, characterized in that, The regulating valve further includes an actuator (5), which is mounted on the valve body (1) and drives the valve stem (4). The actuator (5) is configured to drive the valve stem (4) to move.

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