High-precision gas flow control valve

Abstract

The utility model relates to flow control valve technical field discloses a kind of high-precision gas flow control valve, including valve body, the two ends of the valve body are air inlet and gas outlet, throttling is provided between the air inlet and gas outlet, adjusting part is threadedly connected on the valve body, valve core is threadedly connected in the adjusting part, the valve core points to throttling, the adjusting part and valve body junction is coarse thread, the adjusting part and valve core junction is fine thread, display part is provided on the gas outlet, the display part shows current flow, the device solves the problem of inaccurate adjustment, can be adjusted according to the current flow read by display part, and the setting of coarse thread and fine thread double adjustment structure, the convenience and accuracy of adjustment are considered.

Description

Technical Field

[0001] This utility model relates to the field of flow control valve technology, and more specifically, to a high-precision gas flow control valve. Background Technology

[0002] A flow control valve is a type of valve that controls the flow rate at a throttling orifice by changing the size of the liquid resistance at the throttling orifice under a certain pressure difference, thereby regulating the movement speed of the actuator.

[0003] Commonly available manual control valves adjust flow rate by rotating a knob to move the valve core within the valve body, thereby changing the covering area of ​​the valve core on the throttling orifice. The amount of flow rate adjustment depends on the number of knob rotations. However, the screw pitch of the knob is fixed. Setting a large pitch makes adjustment easy but makes it difficult to control the adjustment precision. Setting a small pitch allows for control of the adjustment precision, but greatly increases the number of rotations, making adjustment cumbersome. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a high-precision gas flow control valve.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-precision gas flow control valve includes a valve body with an inlet and an outlet at its two ends. A throttling orifice is provided between the inlet and outlet. An adjusting element is threaded onto the valve body, and a valve core is threaded onto the adjusting element. The valve core points towards the throttling orifice. The connection between the adjusting element and the valve body is a coarse thread, and the connection between the adjusting element and the valve core is a fine thread. A display element is provided on the outlet to display the current flow rate.

[0007] The present invention is further configured such that: the adjusting member is a hollow cylinder, the coarse thread is provided on the outer wall of the adjusting member, the fine thread is provided on the inner wall of the adjusting member, the valve core is coaxially arranged with the adjusting member and passes through the adjusting member, and the total length of the fine thread is less than the total length of the coarse thread.

[0008] The present invention is further configured such that: an adjusting member extends from one end of the valve core away from the valve body, and a knob is provided on one end of the valve core extending out of the adjusting member.

[0009] The present invention is further configured such that: the display component includes a connector, the connector is a hollow columnar structure, one end of the connector is connected to an air outlet, the other end of the connector is connected to a sleeve, the sleeve is arranged in a vertical direction, the opening of the sleeve is connected to the connector, the closed end of the sleeve faces upward, and a float is provided inside the sleeve.

[0010] The present invention is further configured such that: an indicator ring is provided on the float, the indicator ring is located at the middle position of the float, the indicator ring is coaxially arranged with the sleeve, the indicator ring can slide inside the sleeve, and several scales are evenly arranged on the side wall of the sleeve.

[0011] The present invention is further configured such that: the sleeve and the connector are provided with a bayonet, the bayonet is positioned facing the axis, the minimum diameter of the bayonet is smaller than the diameter of the float, and the sleeve is covered with a protective sleeve, both the sleeve and the protective sleeve being made of transparent material.

[0012] The advantages of this utility model are:

[0013] 1. The adjusting element is equipped with both coarse and fine threads. The adjusting element is connected to the valve body through the coarse thread, and the valve core is connected to the adjusting element through the fine thread. This combines the rapid adjustment of the coarse thread with the fine adjustment of the fine thread, improving the adjustment accuracy while making the operation convenient.

[0014] 2. A display element is installed on the air outlet. The sleeve is connected to the air outlet, and a float is slidably connected inside the sleeve. The sleeve is set in the vertical direction. When the airflow at the air outlet is different, the float floats at different heights, so that the current airflow can be displayed in real time. The airflow can be adjusted according to the display, which improves accuracy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of one embodiment of the present invention;

[0016] Figure 2 For along Figure 1 The cross-sectional view along line AA is shown below;

[0017] Figure 3 for Figure 2 The enlarged view of part B shown;

[0018] Figure 4 for Figure 2 Enlarged view of section C shown;

[0019] In the diagram: 1. Valve body; 11. Air inlet; 12. Air outlet; 13. Throttling port; 2. Valve core; 3. Adjusting element; 31. Coarse thread; 32. Fine thread; 4. Display element; 41. Connector; 42. Sleeve; 421. Scale; 422. Bayonet; 43. Float; 431. Indicator ring; 44. Protective sleeve; 5. Knob. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0022] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0023] Please see Figure 1-4 The present invention provides the following technical solution:

[0024] A high-precision gas flow control valve includes a valve body 1, with an inlet 11 and an outlet 12 at its two ends. A throttling port 13 is provided between the inlet 11 and the outlet 12. An adjusting element 3 is threadedly connected to the valve body 1, and a valve core 2 is internally threaded to the adjusting element 3. The valve core 2 points towards the throttling port 13. The connection between the adjusting element 3 and the valve body 1 is a coarse thread 31, and the connection between the adjusting element 3 and the valve core 2 is a fine thread 32. A display element 4 is provided on the outlet 12 to display the current flow rate.

[0025] The adjusting element 3 is a hollow cylinder. The coarse thread 31 is provided on the outer wall of the adjusting element 3, and the fine thread 32 is provided on the inner wall of the adjusting element 3. The valve core 2 is arranged coaxially with the adjusting element 3 and passes through the adjusting element 3. The total length of the fine thread 32 is less than the total length of the coarse thread 31. The end of the valve core 2 away from the valve body 1 extends out of the adjusting element 3. A knob 5 is provided on the end of the valve core 2 that extends out of the adjusting element 3.

[0026] The display component 4 includes a connector 41, which is a hollow cylindrical structure. One end of the connector 41 is connected to the air outlet 12, and the other end of the connector 41 is connected to a sleeve 42. The sleeve 42 is arranged vertically, and the opening of the sleeve 42 is connected to the connector 41. The closed end of the sleeve 42 faces upward, and a float ball 43 is provided inside the sleeve 42.

[0027] A float 43 is provided with an indicator ring 431, which is located in the middle of the float 43. The indicator ring 431 and the sleeve 42 are coaxially arranged. The indicator ring 431 can slide inside the sleeve 42. Several scales 421 are evenly arranged on the side wall of the sleeve 42.

[0028] The sleeve 42 is provided with a bayonet 422 where it connects to the connector 41. The bayonet 422 is positioned facing the axis. The minimum diameter of the bayonet 422 is smaller than the diameter of the float 43. The sleeve 42 is covered with a protective sleeve 44. Both the sleeve 42 and the protective sleeve 44 are made of transparent material.

[0029] Specifically, the adjusting component 3 is provided with two types of threads: coarse thread 31 and fine thread 32. The adjusting component 3 is connected to the valve body 1 through the coarse thread 31, and the valve core 2 is connected to the adjusting component 3 through the fine thread 32. This takes into account both the rapid adjustment of the coarse thread 31 and the fine adjustment of the fine thread 32, improving the adjustment accuracy while making the operation convenient.

[0030] A display element 4 is provided on the air outlet 12. The sleeve 42 is connected to the air outlet 12. A float 43 is slidably connected inside the sleeve 42. The sleeve 42 is set in the vertical direction. When the airflow at the air outlet 12 is different, the float 43 floats at different heights, so that the current airflow can be displayed in real time. The airflow can be adjusted according to the display, which improves the accuracy.

[0031] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar counterparts and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-precision gas flow control valve, comprising a valve body (1), characterized in that: The valve body (1) has an air inlet (11) and an air outlet (12) at its two ends, respectively. A throttling port (13) is provided between the air inlet (11) and the air outlet (12). An adjusting component (3) is threadedly connected to the valve body (1). A valve core (2) is threadedly connected to the adjusting component (3). The valve core (2) points towards the throttling port (13). The connection between the adjusting component (3) and the valve body (1) is a coarse thread (31). The connection between the adjusting component (3) and the valve core (2) is a fine thread (32). A display component (4) is provided on the air outlet (12). The display component (4) displays the current flow rate.

2. The high-precision gas flow control valve according to claim 1, characterized in that: The adjusting member (3) is a hollow cylinder. The coarse thread (31) is provided on the outer wall of the adjusting member (3), and the fine thread (32) is provided on the inner wall of the adjusting member (3). The valve core (2) is coaxially arranged with the adjusting member (3) and passes through the adjusting member (3). The total length of the fine thread (32) is less than the total length of the coarse thread (31).

3. The high-precision gas flow control valve according to claim 2, characterized in that: The valve core (2) extends from one end away from the valve body (1) to form an adjusting member (3), and a knob (5) is provided on one end of the valve core (2) extending out of the adjusting member (3).

4. The high-precision gas flow control valve according to claim 1, characterized in that: The display component (4) includes a connector (41), which is a hollow columnar structure. One end of the connector (41) is connected to the air outlet (12), and the other end of the connector (41) is connected to a sleeve (42). The sleeve (42) is arranged in a vertical direction, and the opening of the sleeve (42) is connected to the connector (41). The closed end of the sleeve (42) faces upward, and a float (43) is provided inside the sleeve (42).

5. A high-precision gas flow control valve according to claim 4, characterized in that: The float (43) is provided with an indicator ring (431), which is located in the middle of the float (43). The indicator ring (431) and the sleeve (42) are arranged coaxially. The indicator ring (431) can slide inside the sleeve (42). Several scales (421) are evenly arranged on the side wall of the sleeve (42).

6. A high-precision gas flow control valve according to claim 5, characterized in that: The sleeve (42) is provided with a bayonet (422) that connects to the connector (41). The bayonet (422) is set towards the axis. The minimum diameter of the bayonet (422) is smaller than the diameter of the float (43). The sleeve (42) is covered with a protective sleeve (44). Both the sleeve (42) and the protective sleeve (44) are made of transparent material.

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