A micro regulating valve for precisely regulating flow

Abstract

The utility model belongs to valve technical field especially a kind of precision flow regulating micro regulating valve, including valve body and valve rod, valve body is the "T" letter type tee structure, one end is import end, and the opposite symmetry one end is defined position and is clamped hole, the other end is export end, and the bottom surface of position and is clamped hole is equipped with through-hole, position and is clamped hole is equipped with valve seat in, and filler is equipped with above valve seat, and position and is clamped hole opening is equipped with gland, one end of valve body equipped with gland of position and is clamped hole, one end of valve rod is slidably arranged in valve seat, and the end of valve rod is equipped with valve core, and the other end is equipped with hand wheel, and the lateral wall of valve seat is equipped with flow channel groove, and the lateral wall of flow channel groove is equipped with flow hole, and flow hole is connected with export end, and the bottom of valve seat is opened with the flow-through hole matched with valve core.

Description

Technical Field

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

[0002] Regulating valves, also known as control valves, are key devices in industrial automation process control for regulating parameters such as flow rate, pressure, temperature, and liquid level of the medium.

[0003] Existing control valves are bulky, making them difficult to use in space-constrained applications. They also have low adjustment accuracy and cannot respond precisely to minute input changes. For analytical instruments and microreactors that require high precision, current control valves cannot meet the needs.

[0004] To address the aforementioned problems, this utility model document proposes a miniature regulating valve for precise flow regulation. Utility Model Content

[0005] This invention provides a miniature regulating valve for precise flow regulation. It is compact in size, reduces space occupancy, meets the needs of space-constrained scenarios, and has a compact structure for more accurate and precise flow regulation.

[0006] This utility model provides the following technical solution:

[0007] A micro-regulating valve for precise flow regulation includes a valve body and a valve stem. The valve body has a T-shaped three-way structure, with one end being the inlet and the other end having a positioning hole. The bottom surface of the positioning hole has a through hole communicating with the inlet. A valve seat is fitted inside the positioning hole, and packing is placed on top of the valve seat. A pressure cap is provided at the opening of the positioning hole. A valve cover is provided at the end of the valve body with the positioning hole. One end of the valve stem is slidably disposed in the valve seat, and a valve core is provided at this end. The other end passes through the packing, pressure cap, and valve cover and is connected to a handwheel. A flow channel groove is provided on the side wall of the valve seat near the bottom surface of the positioning hole, and a flow hole is provided on the side wall of the flow channel groove, communicating with the outlet. A flow passage hole that mates with the valve core is provided at the bottom of the valve seat.

[0008] Furthermore, a sealing gasket is provided between the bottom surface of the positioning hole and the valve seat.

[0009] Furthermore, the valve stem also has an annular groove on its side, and an annular sealing ring is fitted inside the annular groove.

[0010] Furthermore, the valve seat has a valve cavity hole along the height direction, one end of the valve stem is slidably disposed in the valve cavity hole, the bottom surface of the valve cavity hole is provided with a flow hole, and the end face of the valve stem located at one end of the valve cavity hole is provided with a valve core that cooperates with the flow hole.

[0011] Furthermore, the flow orifice has an inverted teardrop shape, and the end with the smaller diameter of the flow orifice is flush with the bottom surface of the valve cavity.

[0012] Furthermore, the flow hole has a trumpet-shaped structure, with the diameter of one end of its adjacent valve cavity hole being larger than the diameter of the other end; the valve core has a conical structure, with the diameter of the end connected to the valve stem being larger than the diameter of the other end.

[0013] Furthermore, a panel nut is fitted onto the outer side of the valve cover.

[0014] Furthermore, the valve stem sidewall is provided with external threads, the valve cover inner wall is provided with internal threads, and the valve stem is threadedly connected to the valve cover.

[0015] Furthermore, the valve stem has a milled surface on the side wall away from the valve seat, the handwheel is sleeved on this end of the valve stem, the side of the handwheel has a positioning hole, the positioning hole has a locking bolt, and the locking bolt abuts against the milled surface.

[0016] In this invention, the flow rate is controlled by the valve core and valve seat working together, and the flow rate is controlled by the flow area of ​​the flow orifice controlled by the valve stem. Through two-stage flow regulation, the flow regulation accuracy is improved. In addition, the structure is compact and small in size, reducing space occupation and improving the adaptability of the regulating valve. Attached Figure Description

[0017] Figure 1 A cross-sectional view of a micro-regulating valve for precise flow regulation in use, provided in an embodiment of this utility model.

[0018] Figure 2 This is a cross-sectional structural diagram showing another usage state of a micro regulating valve for precise flow regulation provided in this embodiment of the utility model;

[0019] Figure 3 A cross-sectional view of a micro-regulating valve for precise flow control provided in an embodiment of this utility model in a usage state;

[0020] Figure 4 for Figure 3 Enlarged view of part A;

[0021] Figure 5 A cross-sectional view of the valve body in a micro-regulating valve for precise flow control provided in this embodiment of the utility model;

[0022] Figure 6 A cross-sectional view of the valve stem in a micro-regulating valve for precise flow control provided in an embodiment of this utility model;

[0023] Figure 7A schematic diagram of the main structure of the handwheel in a micro-regulating valve for precise flow regulation provided in an embodiment of this utility model;

[0024] Figure 8 for Figure 7 AA section view;

[0025] Figure 9 A schematic diagram of the main structure of the valve cover in a micro-regulating valve for precise flow regulation provided in an embodiment of this utility model;

[0026] Figure 10 for Figure 9 BB cross-sectional view.

[0027] Figure label:

[0028] 1. Valve body; 101. Inlet end; 102. Outlet end; 103. Positioning hole; 2. Valve seat; 3. Valve stem; 301. Annular groove; 302. Milled surface; 303. External thread; 4. Packing; 5. Gland; 6. Valve core; 7. Flow hole; 8. Flow port; 9. Flow channel groove; 10. Sealing gasket; 11. Annular sealing ring; 12. Handwheel; 1201. Positioning hole; 1202. Locking bolt; 13. Panel nut; 14. Valve cover; 1401. Internal thread. Detailed Implementation

[0029] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0030] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to 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 the embodiments of this utility model.

[0031] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0032] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0033] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of the present invention include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0034] Example:

[0035] Reference Figures 1-10 As shown, a miniature regulating valve for precise flow control includes a valve body 1 and a valve stem 3. The valve body 1 has a T-shaped three-way structure, with one end being the inlet 101, a symmetrical end having a positioning hole 103, and the other end being the outlet 102. The bottom surface of the positioning hole 103 has a through hole communicating with the inlet 101. A valve seat 2 is fitted inside the positioning hole 103, and packing 4 is placed above the valve seat 2. A pressure cap 5 is provided at the opening of the positioning hole 103. One end of the valve body 1 with a positioning hole 103 is provided with a valve cover 14. One end of the valve stem 3 is slidably disposed in the valve seat 2, and the valve stem 3 is provided with a valve core 6 at this end. The other end passes through the packing 4, the gland 5 and the valve cover 14 and is connected to a handwheel 12. The side wall of the valve seat 2 near the bottom surface of the positioning hole 103 is provided with a flow channel groove 9. The side wall of the flow channel groove 9 is provided with a flow hole 8, which is connected to the outlet end 102. The bottom of the valve seat 2 is provided with a flow hole 7 that cooperates with the valve core 6.

[0036] The fluid medium enters through the inlet end 101, enters the valve seat 2 through the flow hole 7, flows through the flow hole 8 on the side wall of the valve seat 2 to the flow channel groove 9, and then flows through the flow channel groove 9 to the outlet end 102.

[0037] The flow rate at the flow orifice 7 is controlled by the valve core 6 and valve seat 2, and the flow area at the flow orifice 8 is controlled by the valve stem 3, thereby controlling the flow rate at the flow orifice 8. Through two-stage flow regulation, the flow regulation is more accurate and precise.

[0038] The packing 4 improves the sealing between the valve seat 2 and the valve body 1, as well as the sealing inside the valve seat 2 when the valve stem 3 moves. The gland 5 presses the packing 4 to ensure the positional stability of the packing 4 and ensure that the packing 4 can achieve a sealing effect. The gland 5 is fixed by the valve cover 14 to ensure the positional stability of the gland 5, thereby ensuring that the gland 5 can press the packing 4.

[0039] The handwheel 12 facilitates the movement of the valve stem 3, thereby facilitating the control of the flow rate in the flow passage 7 and the flow orifice 8.

[0040] A sealing gasket 10 is provided between the bottom surface of the positioning hole 103 and the valve seat 2.

[0041] The sealing gasket 10 improves the sealing performance of the contact surface between the valve seat 2 and the valve body 1, preventing fluid medium from leaking from the contact surface and improving the safety of the control valve.

[0042] The valve stem 3 also has an annular groove 301 on its side, and an annular sealing ring 11 is inserted into the annular groove 301.

[0043] The annular sealing ring 11 improves the sealing performance between the valve stem 3 and the valve seat 2, and also improves the sealing performance of the valve stem 3 during movement, preventing fluid medium from leaking from the contact surface between the valve stem 3 and the valve seat 2, thereby improving the safety of the control valve.

[0044] The valve seat 2 has a valve cavity hole along the height direction. One end of the valve stem 3 is slidably disposed in the valve cavity hole. A flow hole 7 is provided on the bottom surface of the valve cavity hole. A valve core 6 that cooperates with the flow hole 7 is provided on the end face of the valve stem 3 located at one end of the valve cavity hole.

[0045] The flow rate at the flow hole 7 is controlled by the valve core 6 extending into the flow hole 7, and the valve seat 2 is easily positioned by the valve cavity hole.

[0046] The flow orifice 8 is an inverted teardrop shape, and the smaller diameter end of the flow orifice 8 is flush with the bottom surface of the valve cavity.

[0047] The inverted teardrop-shaped structure has the smaller diameter end of the flow orifice 8 close to the valve core 6. When the flow rate is low, the smaller diameter end of the flow orifice 8 opens, allowing the fluid medium to pass through, which facilitates more precise control of the flow rate when the flow rate is low.

[0048] The flow orifice 8 is flush with the bottom surface of the valve cavity orifice, ensuring that when the valve core 6 opens the flow orifice 7, the valve stem 3 will also open the flow orifice 8, thus ensuring the flow of the regulating valve.

[0049] The flow hole 7 has a trumpet-shaped structure, with the diameter of one end of its adjacent valve cavity hole being larger than the diameter of the other end. The valve core 6 has a conical structure, with the diameter of the end connected to the valve stem 3 being larger than the diameter of the other end.

[0050] The valve core 6 is conical, while the flow hole 7 is trumpet-shaped, which facilitates the insertion of the valve core 6 into the flow hole 7 and its cooperation with the flow hole 7, thereby regulating the flow rate at the flow hole 7.

[0051] A panel nut 13 is fitted on the outside of the valve cover 14.

[0052] The control valve is easily installed by using the panel nut 13. The valve cover 14 is inserted into the installation position and locked by the panel nut 13, thereby installing the control valve in the use position.

[0053] The valve stem 3 has an external thread 303 on its side wall and an internal thread 1401 on its inner wall. The valve stem 3 and the valve cover 14 are threaded together.

[0054] The valve cover 14 is fixed in the use position. The valve stem 3 is rotated to adjust the position of the valve stem 3 in the valve seat 2, thereby adjusting the flow rate at the valve core 6 and the flow hole 7, as well as the flow area of ​​the flow hole 8 on the valve seat 2. The flow rate can be accurately controlled by rotating and moving the valve stem 3.

[0055] The valve stem 3 has a milled surface 302 on its side wall away from the valve seat 2. The handwheel 12 is sleeved on this end of the valve stem 3. The side of the handwheel 12 has a positioning hole 1201, and a locking bolt 1202 is installed in the positioning hole 1201. The locking bolt 1202 abuts against the milled surface 302. The handwheel 12 is fixed to the valve stem 3 by the locking bolt 1202.

[0056] In use, the fluid medium flows in from the inlet 101, passes through the flow hole 7, and enters the valve cavity. It then enters the flow channel 9 through the flow hole 8 on the side wall of the valve cavity, and flows into the outlet 102 through the flow channel 9. Turning the handwheel 12 rotates the valve stem 3, causing it to move within the valve seat 2. As the valve stem 3 moves upward, it moves the valve core 6 away from the flow hole 7, opening the flow hole 7. Simultaneously, the side wall of the valve stem 3 opens the flow hole 8 on the side wall of the valve seat 2. The further the valve stem 3 moves upward, the more open the flow hole 7 and flow hole 8 become, resulting in a larger flow rate. To reduce the flow rate, the handwheel 12 is turned in the opposite direction, causing the valve stem 3 to move downward, inserting the valve core 6 into the flow hole 7. Simultaneously, the valve stem 3 closes the flow area of ​​the flow hole 8, thus reducing the flow rate.

[0057] In practical use, the inlet end 101 and outlet end 102 of the regulating valve are equipped with compression fittings to facilitate the connection of the regulating valve with external pipelines.

[0058] The handwheel 12 and valve cover 14 are equipped with scales, which can be pre-determined according to the customer's desired flow rate, so that the user can accurately adjust the flow rate at any time during use.

[0059] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A miniature regulating valve for precise flow regulation, characterized in that, The valve includes a valve body and a valve stem. The valve body has a "T"-shaped three-way structure, with one end being the inlet and the other end being the outlet. The bottom surface of the positioning hole has a through hole that communicates with the inlet. A valve seat is fitted inside the positioning hole, and packing is placed on top of the valve seat. A pressure cap is provided at the opening of the positioning hole. A valve cover is provided at the end of the valve body with the positioning hole. One end of the valve stem is slidably mounted inside the valve seat, and a valve core is provided at this end. The other end passes through the packing, pressure cap, and valve cover and is connected to a handwheel. A flow channel groove is provided on the side wall of the valve seat near the bottom surface of the positioning hole, and a flow hole is provided on the side wall of the flow channel groove. The flow hole communicates with the outlet. A flow hole that mates with the valve core is provided at the bottom of the valve seat.

2. The micro-regulating valve for precise flow regulation according to claim 1, characterized in that, A sealing gasket is provided between the bottom surface of the positioning hole and the valve seat.

3. The micro-regulating valve for precise flow regulation according to claim 1, characterized in that, The valve stem also has an annular groove on its side, and an annular sealing ring is fitted into the annular groove.

4. The miniature regulating valve for precise flow regulation according to claim 1, characterized in that, The valve seat has a valve cavity hole along the height direction, one end of the valve stem is slidably disposed in the valve cavity hole, the bottom surface of the valve cavity hole is provided with a flow hole, and the end face of the valve stem located at one end of the valve cavity hole is provided with a valve core that cooperates with the flow hole.

5. A micro regulating valve for precise flow regulation according to claim 4, characterized in that, The flow orifice is an inverted teardrop shape, and the end with the smaller diameter of the flow orifice is flush with the bottom surface of the valve cavity.

6. A micro regulating valve for precise flow regulation according to claim 5, characterized in that, The flow hole has a funnel-shaped structure, with the diameter of one end of its adjacent valve cavity hole being larger than the diameter of the other end. The valve core has a conical structure, with the diameter of the end connected to the valve stem being larger than the diameter of the other end.

7. A micro regulating valve for precise flow regulation according to claim 1, characterized in that, A panel nut is fitted on the outside of the valve cover.

8. A miniature regulating valve for precise flow regulation according to claim 1, characterized in that, The valve stem has external threads on its side wall, and the valve cover has internal threads on its inner wall. The valve stem and the valve cover are threaded together.

9. A micro-regulating valve for precise flow regulation according to claim 1, characterized in that, The valve stem has a milled surface on the side wall away from the valve seat. The handwheel is sleeved on this end of the valve stem. The handwheel has a positioning hole on its side and a locking bolt is installed in the positioning hole. The locking bolt abuts against the milled surface.

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