High-precision flow control valve with spiral fine adjustment structure

Abstract

A high-precision flow control valve with a spiral fine adjustment structure comprises a valve element located in the center inside a valve body, the valve element is connected with the valve body through a valve rod, the outer surface of the valve element is provided with a spiral fine adjustment groove, and the lower end of the valve rod is provided with a protruding structure matched with the spiral fine adjustment groove of the valve element and inserted into the spiral fine adjustment groove of the valve element. The protruding structure slides in the spiral fine adjustment groove to drive the valve element to move slightly, the valve element and the valve rod are matched to control flow, the adjusting nut is installed on the portion, extending out of the valve body, of the upper portion of the valve rod, internal threads matched with threads of the valve rod are arranged in the adjusting nut, and the adjusting nut is connected with the valve rod through the threads. The flow regulation indicating device comprises a sensor and an electronic display, and the sensor collects flow information and transmits the flow information to the display for display. High-precision fine adjustment of flow is achieved, the linearity of flow control of the valve under different opening degrees is improved, and the requirement for high-precision flow control is met.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a high-precision flow control valve with a spiral fine-tuning structure. Background Technology

[0002] In the field of valve technology, with the increasingly sophisticated development of modern industry, such as fine chemicals, high-precision fluid experiments, and high-end manufacturing, the requirements for flow control accuracy are becoming increasingly stringent. However, current valve technology still faces many challenges in flow control.

[0003] Traditional valves, when regulating flow, often only achieve coarse control, as their structural design does not fully consider the ability to precisely adjust minute flow variations. For processes requiring high-precision flow control, these valves fail to meet the requirements, leading to significant fluctuations in product quality during production. For example, in fine chemical production, even slight deviations in reactant flow rates can alter the progress and outcome of chemical reactions, thus affecting product purity and performance. In high-precision fluid experiments, inaccurate flow control introduces substantial experimental errors, reducing the reliability of experimental data.

[0004] To address the issue of flow control accuracy, researchers have explored various methods. Some existing technologies improve control accuracy by modifying the valve's drive mechanism, but these improvements have limited effectiveness in regulating minute changes in flow rate because they do not fundamentally alter the internal flow regulation structure of the valve. Other solutions employ complex electronic control systems to assist flow regulation, but this not only increases cost and system complexity but also risks compromising the stability and reliability of the electronic system under certain complex operating conditions. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides a high-precision flow control valve with a spiral fine-tuning structure. By designing a spiral fine-tuning groove on the valve core, optimizing the connection between the valve stem and the valve core, and setting an adjusting nut and a precise indicating device, high-precision fine-tuning of the flow rate is achieved, improving the linearity of flow control at different opening degrees and meeting the requirements of high-precision flow control.

[0006] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows:

[0007] A high-precision flow control valve with a spiral fine-tuning structure is characterized by comprising: a valve body, a valve core, a valve stem, an adjusting nut, and a flow regulation indicator.

[0008] Preferably, the valve body is the main load-bearing structure of the entire valve, consisting of a main valve body and a valve cover. Its internal fluid channels provide pathways for fluid input and output. The main valve body and valve cover are bolted together to form a complete enclosed space, ensuring that the internal fluid does not leak to the outside. An O-ring seal is installed at the connection between the main valve body and the valve cover, effectively filling the tiny gaps at the connection. When fluid flows within the channels, pressure causes the O-ring to form a tight seal at the connection interface, preventing fluid leakage from the connection between the main valve body and the valve cover, thus ensuring the overall sealing performance of the valve body.

[0009] Preferably, the valve core is located at the center of the valve body, and its outer surface is machined with helical fine-tuning grooves of specific specifications. These helical fine-tuning grooves are one of the key components for achieving high-precision flow control. The pitch of the helical fine-tuning grooves is 0.1-0.5 mm, the depth is 0.5-2 mm, and the width is 1-3 mm. This design allows the valve core to precisely change the flow rate of fluid through the valve body through minute axial movements when it cooperates with the valve stem.

[0010] Preferably, the valve stem, located inside the valve body, serves to transmit power and enable fine-tuning of the valve core. The lower end of the valve stem has a diameter larger than the valve core diameter and a groove that matches the valve core. The bottom of the inner surface of the groove at the lower end of the valve stem is designed with a raised structure that matches the spiral fine-tuning groove of the valve core. The raised structure inserts into the spiral fine-tuning groove, and the fit between the two allows the valve stem to slide smoothly within the groove. When the valve stem rotates, the interaction between the raised structure and the spiral fine-tuning groove causes the valve core to move slightly axially. The upper end of the valve stem extends outside the valve body and is connected to the adjusting nut. This layout facilitates operation of the valve stem from outside the valve body, thereby controlling the position of the valve core.

[0011] Preferably, the adjusting nut is installed at the upper part of the valve stem extending from the valve body, and has an internal thread that matches the valve stem thread. By rotating the adjusting nut, the valve stem can be axially displaced due to the threaded connection. The operator can rotate the adjusting nut as needed to precisely adjust the position of the valve stem, thereby controlling the minute movements of the valve core and achieving high-precision regulation of fluid flow. The outer surface of the adjusting nut can be designed with a shape or texture that facilitates manual operation, making it easy for the operator to apply force for rotation.

[0012] Preferably, the sensor is installed inside the valve body at a key location in contact with the fluid. It can sense physical quantities related to flow rate, such as fluid velocity and pressure changes. The sensor converts these physical quantities into electrical signals. Then, the built-in circuit processes the signals, converting them into digital signals, and transmits them to the microprocessor. The microprocessor calculates accurate flow rate information based on a preset algorithm and the characteristics of the sensor.

[0013] Preferably, the electronic display is mounted on the outside of the valve body in an easily observable location via a reliable connection method such as clips or bolts. It receives flow information from the sensor, processed by a microprocessor, and displays it intuitively. Operators can observe the flow status displayed on the electronic display to understand the valve opening and flow regulation in real time, thus facilitating flow control operations.

[0014] Preferably, the valve further includes a valve seat, which is an annular structure located within the fluid passage of the valve body, with its outer wall tightly fixed to the inner wall of the valve body. The fixing method includes threaded connection, welding, or snap-fit, ensuring the stability of the valve seat within the valve body. The valve seat and valve core cooperate to form a sealing surface. When the valve is in the closed state or when fluid needs to be cut off, the valve core tightly adheres to the valve seat, preventing fluid from passing through and achieving a sealing barrier, thus preventing fluid from passing through the valve unnecessarily.

[0015] Preferably, the valve further includes a stuffing box located where the valve stem passes through the valve body and is connected to the valve body via an interference fit. The stuffing box provides space for the packing. When the valve is in operation, the packing in the stuffing box fills the gap between the valve stem and the valve body, preventing fluid from leaking along the valve stem to the outside of the valve.

[0016] Preferably, the valve further includes a gland, which is fixed to the valve body by means of bolted connections. The gland secures and compresses the packing within the stuffing box. By tightening the bolts, the gland applies axial pressure to the packing, causing it to expand radially and thus more tightly fill the gap between the valve stem and the valve body. This design effectively prevents fluid leakage along the valve stem during its movement, ensuring the valve's sealing performance under various operating conditions. Furthermore, the tightening of the bolts can be adjusted according to actual conditions to optimize the packing's sealing effect and the valve stem's operational flexibility.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model, through the meticulous design of a spiral fine-tuning groove on the valve core and the connection between the valve stem and the valve core via a protruding structure that engages with the spiral fine-tuning groove, enables precise axial movement control of the valve core, thereby achieving high-precision flow regulation. This fine-tuning structure allows for accurate flow rate control in processes with stringent flow accuracy requirements, such as fine chemical production and high-end laboratory fluid experiments. It effectively avoids product quality issues or experimental result errors caused by minute flow rate deviations, significantly improving the quality and reliability of production and experiments.

[0019] 2. The valve of this utility model simplifies operation through the threaded connection between the adjusting nut and the valve stem. Operators can easily control the valve stem position by rotating the adjusting nut, thereby achieving fine-tuning of the valve core. Compared to the complex or difficult-to-precise flow regulation methods in existing technologies, this convenient operation method not only improves work efficiency but also reduces the skill requirements for operators.

[0020] 3. This utility model provides operators with intuitive and accurate flow information through a flow regulation and indication device composed of a sensor and an electronic display. The sensor can accurately collect flow-related physical quantities and convert them into processable signals. After calculation by a microprocessor, the current flow status is displayed on the electronic display, greatly improving the convenience and accuracy of operation. Operators can monitor the flow situation in real time without the need for complex external measuring equipment, thus enabling more efficient flow regulation operations. Attached Figure Description

[0021] Figure 1 This is a cross-sectional structural schematic diagram of the present invention;

[0022] Figure 2 This is a utility model Figure 1 Enlarged diagram of point A in the middle.

[0023] 1. Valve body; 2. Sealing structure; 3. Adjusting nut; 4. Valve stem; 5. Valve core; 6. Valve seat; 7. Electronic display; 8. Sensor; 9. Stuffing gland; 10. Gland; 11. Main valve body; 12. Valve cover; 21. O-ring seal; 41. Raised structure. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1-2 As shown, the valve in this embodiment of the present invention includes a valve body 1, a valve core 5, a valve stem 4, an adjusting nut 3, and a flow regulating indicator.

[0026] The valve body 1, as the main structure of the valve, consists of two parts: the valve body 11 and the valve cover 12. They are tightly connected by bolts to form a closed fluid channel. At the connection between the valve body 11 and the valve cover 12, an O-ring 21 is provided as a sealing structure 2 to ensure that fluid does not leak from the connection and to guarantee the overall sealing performance of the valve body 1.

[0027] The adjusting nut 3 is installed at the point where the valve stem 4 extends out of the valve body 1. The adjusting nut 3 has an internal thread that matches the thread of the valve stem 4; rotating the adjusting nut 3 drives the valve stem 4 to move axially. The outer surface of the adjusting nut 3 is a hexagonal handwheel, allowing the operator to apply force to rotate it and achieve precise flow regulation.

[0028] The electronic display 7 is mounted on the outside of the valve body 1 via a snap-fit ​​mechanism. The electronic display 7 receives and displays flow information processed by the microprocessor from the sensor 8, enabling operators to intuitively understand the valve's flow status and thus perform precise flow control.

[0029] The valve core 5 is located at the center of the valve body 1. The outer surface of the valve core 5 is machined with helical fine-tuning grooves of specific specifications. The pitch of these helical fine-tuning grooves is 0.1-0.5 mm, the depth is 0.5-2 mm, and the width is 1-3 mm. This design allows the valve core 5 to precisely change the flow rate of fluid through the valve body 1 with slight axial movement.

[0030] The lower end of the valve stem 4 has a diameter larger than that of the valve core 5 and has a groove that matches the valve core 5. The bottom of the inner surface of the groove at the lower end of the valve stem 4 is designed with a raised structure 41 that matches the spiral fine-tuning groove of the valve core 5. This raised structure 41 inserts into the spiral fine-tuning groove, and the fit between the two allows the valve stem 4 to slide smoothly within the spiral fine-tuning groove. When the valve stem 4 rotates, the interaction between the raised structure and the spiral fine-tuning groove drives the valve core 5 to make a slight axial movement, thereby achieving high-precision flow regulation.

[0031] To achieve accurate flow measurement and display, a sensor 8 is installed inside the valve. The sensor 8 is installed in a key part of the valve body 1 that comes into contact with the fluid. It can sense physical quantities such as fluid velocity and pressure changes, and convert them into electrical signals. Then, the built-in circuit processes the signals, converting them into digital signals, and transmits them to the microprocessor. Based on a preset algorithm and the characteristics of the sensor 8, the microprocessor calculates accurate flow information and sends it to the electronic display 7 for display.

[0032] In addition, the valve also includes a valve seat 6, a stuffing box 9, and a gland 10. The valve seat 6 is an annular structure located within the fluid passage of the valve body 1. Its outer wall is tightly fixed to the inner wall of the valve body 1, and it forms a sealing surface with the valve core 5 to prevent fluid from passing through the valve unnecessarily. The stuffing box 9 is located where the valve stem 4 passes through the valve cover 12. It is fixedly connected to the valve body 1 by an interference fit, providing space for the packing to fill the gap between the valve stem 4 and the valve body 1, preventing fluid leakage along the valve stem 4. The gland 10 is bolted to the valve cover 12, fixing and compressing the packing in the stuffing box 9, further ensuring the valve's sealing performance.

[0033] The implementation principle of a high-precision flow control valve with a spiral fine-tuning structure in this application embodiment is as follows:

[0034] When flow adjustment is required, the operator rotates the adjusting nut 3, which, due to the threaded connection, drives the valve stem 4 to move axially. The valve stem 4, through its lower protruding structure 41, engages with the spiral fine-tuning groove of the valve core 5, causing the valve core 5 to move slightly axially. This slight movement can precisely change the flow rate of fluid through the valve body 1. Simultaneously, the sensor 8 senses the flow rate changes in real time and sends the relevant information to the electronic display 7 for display, allowing the operator to intuitively understand the current flow rate status and make further adjustments.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-precision flow control valve with a spiral fine-tuning structure, characterized in that, include: Valve body (1), valve core (5), valve stem (4), adjusting nut (3), flow regulating indicator; The valve body (1) is the main structure of the valve, including the main valve body (11) and the valve cover (12), and has a fluid channel designed inside; The valve core (5) is located at the center of the valve body (1) and is connected to the valve body (1) through the valve stem (4). The outer surface of the valve core (5) is machined with a spiral fine-tuning groove. The valve core (5) and the valve stem (4) cooperate to control the flow rate of fluid through the valve body (1) by its small axial movement. The lower end of the valve stem (4) is provided with a protruding structure (41) that matches the spiral fine-tuning groove of the valve core (5). The lower end of the valve stem (4) is inserted into the spiral fine-tuning groove of the valve core (5). The valve stem (4) slides in the spiral fine-tuning groove through the protruding structure (41). The upper end extends out of the valve body (1) and is connected to the adjusting nut (3). The adjusting nut (3) is installed at the upper end of the valve stem (4) where it extends out of the valve body (1). The adjusting nut (3) has an internal thread that matches the thread of the valve stem (4). The adjusting nut (3) and the valve stem (4) are connected by threads. The flow regulation indicator includes a sensor (8) and an electronic display (7). The sensor (8) collects flow information and transmits the flow information to the electronic display (7). The electronic display (7) displays the current flow status of the valve.

2. The high-precision flow control valve with a spiral fine-tuning structure according to claim 1, characterized in that, The spiral fine-tuning groove has a pitch of 0.1-0.5 mm, a depth of 0.5-2 mm, and a width of 1-3 mm.

3. A high-precision flow control valve with a spiral fine-tuning structure according to claim 1, characterized in that, The lower end diameter of the valve stem (4) is larger than the diameter of the valve core (5), and has a groove that matches the valve core (5). The protruding structure (41) at the lower end of the valve stem (4) is located at the bottom of the inner surface of the groove at the lower end of the valve stem (4).

4. A high-precision flow control valve with a spiral fine-tuning structure according to claim 1, characterized in that, The main valve body (11) and the valve cover (12) are connected by bolts. A sealing structure (2) is provided at the connection between the main valve body (11) and the valve cover (12). The sealing structure (2) is an O-ring (21).

5. A high-precision flow control valve with a spiral fine-tuning structure according to claim 1, characterized in that, The sensor (8) is fixedly installed inside the valve body (1) at a key part that comes into contact with the fluid, and the electronic display (7) is installed outside the valve body (1) in an easily observable position by means of a snap-fit ​​or bolt connection.

6. A high-precision flow control valve with a spiral fine-tuning structure according to claim 1, characterized in that, The valve also includes a valve seat (6), which is an annular structure located in the fluid channel inside the valve body (1). The outer wall of the valve seat (6) is tightly fixed to the inner wall of the valve body (1). The fixing method includes threaded connection, welding or snap-fit. The valve seat (6) and the valve core (5) cooperate to form a sealing surface.

7. A high-precision flow control valve with a spiral fine-tuning structure according to claim 1, characterized in that, The valve also includes a stuffing box (9) and a gland (10). The stuffing box (9) is located where the valve stem (4) passes through the valve body (1) and is connected to the valve body (1) by means of an interference fit. The gland (10) is installed on the valve body (1) by means of bolts to fix and press the packing in the stuffing box (9).

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