An improved valve core device for a natural gas well throttle valve

Abstract

This utility model discloses an improved valve core device for a natural gas well throttling valve. Relating to the field of throttling valve technology, the device includes a valve body assembly. A valve seat assembly is fixedly installed at the bottom inner side of the valve body assembly, and a valve core assembly is interposed between the valve body assembly and the valve seat assembly. The valve core assembly includes an adjusting valve core, and the valve seat assembly includes an adjusting valve seat. The valve body assembly includes a gas chamber, and the adjusting valve seat is fixedly installed at the bottom inner side of the gas chamber. A valve hole is opened in the middle of the adjusting valve seat, and the adjusting valve core is disposed inside the valve hole. An air hole is opened at the top inner side of the valve hole, and the air hole has an inclined V-shaped structure. This utility model can effectively improve the adjustment accuracy, making the gas throttling flow rate correspond to the change in valve opening, accurately controlling the gas flow rate through the valve. Furthermore, the secondary throttling reduces the gas velocity, reduces the friction between the valve core and the valve seat, and effectively improves the service life, thus possessing high practical value.

Description

Technical Field

[0001] This utility model relates to the field of throttle valve technology, specifically to an improved valve core device for a natural gas well throttle valve. Background Technology

[0002] A throttle valve is a valve used to regulate the flow rate of fluids (liquid or gas). It controls the flow velocity and pressure of the fluid by changing the cross-sectional area of ​​the valve's internal passage. It is widely used in various industrial fields, such as petroleum, chemical, and water treatment, to achieve precise control of the flow rate of media within the system. Natural gas well throttle valves are specifically designed for use in the natural gas extraction process. This type of throttle valve is mainly used to control the flow rate and pressure of natural gas extracted from natural gas wells. Because natural gas is extracted from a high-pressure environment deep underground, pressure regulation is required before it directly enters the production pipeline to ensure safety and efficiency.

[0003] Based on the above, the inventors have discovered the following problems: Existing natural gas well throttle valves cannot accurately control the flow rate of natural gas. The valve opening degree does not correspond to the flow rate; a small opening degree results in a large flow rate. Common throttle valves start at 30% opening degree, after which the natural gas flow rate no longer changes. Some throttle valves have even smaller opening degrees, making them inconvenient to use.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided an improved valve core device for natural gas well throttle valves, in order to achieve a more practical purpose. Utility Model Content

[0005] The purpose of this invention is to provide an improved valve core device for a natural gas well throttle valve to solve the problems mentioned in the background art.

[0006] An improved valve core device for a natural gas well throttling valve includes a valve body assembly. A valve seat assembly is fixedly installed on the bottom inner side of the valve body assembly, and a valve core assembly is interposed between the valve body assembly and the valve seat assembly. The valve core assembly includes a regulating valve core, and the valve seat assembly includes a regulating valve seat. The valve body assembly includes a gas chamber, and the regulating valve seat is fixedly installed on the bottom inner side of the gas chamber. A valve hole is opened in the middle of the regulating valve seat, and the regulating valve core is disposed inside the valve hole. A gas hole is opened on the top inner side of the valve hole, and the gas hole has an inclined V-shaped structure.

[0007] By adopting the above technical solution, the valve core assembly and valve seat assembly are designed to facilitate their cooperation in regulating the flow rate. The valve core allows for easy adjustment of the flow rate, with its position determining the flow rate. The valve seat is designed for easy and secure installation at the bottom of the gas chamber, forming a sealing pair with the valve core. The gas chamber provides a flow path for the gas, and the valve orifice provides an insertion channel for the valve core, serving as the main passage for gas. The inclined V-shaped structure of the orifice allows for a portion of the gas to flow downwards through the gap between the first sealing surface and the valve orifice when the valve is open, while another portion enters from the top of the orifice, changes direction, and exits from the bottom, impacting the valve core and forming an upward airflow. This creates an air column that obstructs the downward flow of gas, effectively improving the device's control accuracy of the medium flow rate.

[0008] Furthermore, the air vents are provided in four parts, and the air vents are arranged in a ring array.

[0009] By adopting the above technical solution and setting four air holes, the valve opening can be made larger, and the gap between the first sealing surface and the valve hole can be made larger, thereby making the air column that hinders the airflow from top to bottom stronger, effectively reducing a portion of the gas flowing downward and improving control accuracy.

[0010] Furthermore, a buffer groove is provided in the middle of the regulating valve core, and the buffer groove forms a first sealing surface and a second sealing surface on the side of the regulating valve core.

[0011] By adopting the above technical solution, the buffer groove facilitates the formation of a buffer chamber between the regulating valve core and the valve hole, allowing the gas flowing downward from the gap between the first sealing surface and the valve hole to be temporarily stored in the buffer chamber.

[0012] Furthermore, the inner wall of the valve hole is in contact with the first sealing surface and the second sealing surface, and the taper of the first sealing surface is smaller than the taper of the second sealing surface.

[0013] By adopting the above technical solution, the taper of the first sealing surface is smaller than that of the second sealing surface, which facilitates the air in the buffer chamber to flow out from the gap between the second sealing surface and the valve hole. The second sealing surface performs secondary throttling on the airflow, further improving the accuracy of flow regulation.

[0014] Furthermore, a valve stem is fixedly installed on the top of the regulating valve core, and a connector is provided at the top of the valve stem.

[0015] By adopting the above technical solution, the valve stem and connector are designed to facilitate the fixed connection between the actuator end of the external actuator and the connector, thereby enabling the valve stem to control the position of the regulating valve core and achieve the function of regulating the flow rate.

[0016] Furthermore, an air inlet flange is provided on one side of the air chamber, the air inlet flange is connected to the interior of the air chamber, and the air inlet flange is located on the top of the valve seat assembly.

[0017] By adopting the above technical solution and setting the air inlet flange, it is easy to connect to the external air inlet pipeline, so that the airflow can enter the air chamber.

[0018] Furthermore, an outlet flange is provided at the bottom of the air chamber, the outlet flange is located at the bottom of the valve seat assembly, and flange detection holes are provided on the sides of both the inlet flange and the outlet flange.

[0019] By adopting the above technical solution, the setting of the gas outlet flange facilitates connection to the external gas outlet pipeline, allowing the gas after throttling to be discharged. The flange detection hole facilitates the installation of external sensors for detecting pressure or leakage, making maintenance and monitoring convenient.

[0020] Furthermore, a connecting seat is provided at the top of the air chamber, and the connecting seat is located on the outside of the valve stem.

[0021] By adopting the above technical solution and setting the connecting seat, it is easy to fix the valve body assembly to the external valve actuator, which facilitates the valve actuator to control the valve core assembly.

[0022] Furthermore, the connecting seat is slidably connected to the valve stem, and a packing groove is provided on the top of the connecting seat.

[0023] By adopting the above technical solution, the filling groove facilitates the fixed installation of the sealing packing on the outside of the valve stem, achieving a sealing effect and preventing gas leakage during use.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows: The arrangement of the valve core assembly and valve seat assembly facilitates their cooperation in regulating the flow rate. The adjustment of the valve core facilitates flow rate adjustment; the position of the valve core determines the flow rate. The adjustment of the valve seat facilitates its fixed installation at the bottom of the gas chamber, forming a sealing pair with the valve core. The gas chamber provides a flow path for the gas. The valve orifice provides an insertion channel for the valve core, serving as the main channel for gas passage. The inclined V-shaped structure of the orifice facilitates the adjustment of the flow rate when the valve has a certain... When the valve is open, part of the gas in the air chamber flows downward through the gap between the first sealing surface and the valve hole, while another part enters from the top of the air hole, changes direction, and is blown out from the bottom, impacting the regulating valve core, forming an upward airflow. This creates an air column that obstructs the downward flow of the gas, effectively improving the device's control accuracy of the medium flow rate. This invention effectively improves the regulation accuracy, making the gas throttling flow rate correspond to the valve opening, precisely controlling the gas flow rate through the valve. Furthermore, the secondary throttling reduces the gas velocity, decreases the friction between the valve core and the valve seat, and effectively improves the service life, demonstrating high practical value. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of an improved valve core device for a natural gas well throttle valve according to the present invention;

[0026] Figure 2 This is a cross-sectional view of an improved valve core device for a natural gas well throttle valve according to this utility model;

[0027] Figure 3 This is a three-dimensional structural diagram of the valve core assembly of this utility model;

[0028] Figure 4 This is a three-dimensional structural diagram of the valve seat assembly of this utility model;

[0029] Figure 5 This is a top view of the valve seat assembly of this utility model.

[0030] In the diagram: 1. Valve body assembly; 11. Air chamber; 12. Inlet flange; 13. Outlet flange; 14. Flange probe hole; 15. Connecting seat; 16. Packing groove; 2. Valve core assembly; 21. Valve stem; 22. Regulating valve core; 23. Buffer groove; 24. Connector; 3. Valve seat assembly; 31. Regulating valve seat; 32. Valve hole; 33. Air hole. Detailed Implementation

[0031] 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.

[0032] Please see Figures 1-5 This utility model provides a technical solution: an improved valve core device for a natural gas well throttling valve, including a valve body assembly 1, a valve seat assembly 3 fixedly installed on the bottom inner side of the valve body assembly 1, and a valve core assembly 2 intersecting between the valve body assembly 1 and the valve seat assembly 3. The valve core assembly 2 and the valve seat assembly 3 facilitate mutual cooperation to regulate the flow rate. The valve core assembly 2 includes an adjusting valve core 22, which facilitates flow rate adjustment; the position of the adjusting valve core 22 determines the flow rate. The valve seat assembly 3 includes an adjusting valve seat 31, which is fixedly installed at the bottom of the gas chamber 11, forming a sealing pair with the adjusting valve core 22. The valve body assembly 1 includes a gas chamber 11, which facilitates the supply of gas. The flow path is as follows: the regulating valve seat 31 is fixedly installed at the bottom of the inner side of the gas chamber 11. A valve hole 32 is opened in the middle of the regulating valve seat 31. The valve hole 32 provides a channel for the regulating valve core 22 to be inserted and is the main channel for gas to pass through. The regulating valve core 22 is set inside the valve hole 32. An air hole 33 is opened at the top of the inner side of the valve hole 32. The air hole 33 has an inclined V-shaped structure. The inclined V-shaped structure of the air hole 33 makes it easy for part of the gas in the gas chamber 11 to flow downward from the gap between the first sealing surface 25 and the valve hole 32 when the valve has a certain opening. Another part of the gas enters from the top of the air hole 33, changes direction, blows out from the bottom and impacts the regulating valve core 22, forming an upward airflow. This forms an air column that obstructs the downward flow of airflow, thereby effectively improving the control accuracy of the device on the medium flow rate.

[0033] The valve has four vents 33 arranged in a ring array. The arrangement of the four vents 33 allows for a larger valve opening and a larger gap between the first sealing surface 25 and the valve hole 32, thereby making the air column that hinders the airflow from top to bottom stronger, effectively reducing the downward flow of some gas and improving control accuracy.

[0034] The regulating valve core 22 has a buffer groove 23 in the middle. The buffer groove 23 forms a first sealing surface 25 and a second sealing surface 26 on the side of the regulating valve core 22. The buffer groove 23 facilitates the formation of a buffer air chamber between the regulating valve core 22 and the valve hole 32, so that the gas flowing downward from the gap between the first sealing surface 25 and the valve hole 32 is temporarily stored in the buffer air chamber.

[0035] The inner wall of the valve hole 32 is in contact with the first sealing surface 25 and the second sealing surface 26, and the taper of the first sealing surface 25 is smaller than that of the second sealing surface 26. Because the taper of the first sealing surface 25 is smaller than that of the second sealing surface 26, the air in the buffer chamber can flow out through the gap between the second sealing surface 26 and the valve hole 32. The second sealing surface 26 performs secondary throttling on the airflow, further improving the accuracy of flow regulation.

[0036] The valve core 22 is fixedly mounted with a valve stem 21, and the valve stem 21 has a connector 24 at its top. The valve stem 21 and the connector 24 facilitate the fixed connection between the actuator end of the external actuator and the connector 24, thereby allowing the valve stem 21 to control the position of the valve core 22 and achieve the function of regulating the flow.

[0037] The air chamber 11 is provided with an air inlet flange 12 on one side. The air inlet flange 12 is connected to the interior of the air chamber 11 and is located on the top of the valve seat assembly 3. The air inlet flange 12 facilitates connection to the external air inlet pipeline, allowing airflow to enter the air chamber 11.

[0038] The bottom of the air chamber 11 is provided with an air outlet flange 13, which is located at the bottom of the valve seat assembly 3. Both the air inlet flange 12 and the air outlet flange 13 are provided with flange detection holes 14. The air outlet flange 13 facilitates the connection to the external air outlet pipeline, allowing the gas after throttling to be discharged. The flange detection holes 14 facilitate the installation of external sensors for detecting pressure or leakage, making maintenance and monitoring convenient.

[0039] The air chamber 11 is provided with a connecting seat 15 at the top. The connecting seat 15 is located on the outside of the valve stem 21. The connecting seat 15 facilitates the fixed connection between the valve body assembly 1 and the external valve actuator, so that the valve actuator can control the valve core assembly 2.

[0040] The connecting seat 15 is slidably connected to the valve stem 21. The top of the connecting seat 15 is provided with a packing groove 16. The packing groove 16 facilitates the fixing of the sealing packing to the outside of the valve stem 21, achieving a sealing effect and preventing gas leakage during use.

[0041] Specifically, the working principle of this improved valve core device for natural gas well throttling valves is as follows: During use, the inlet flange 12 facilitates connection to an external inlet pipeline, allowing airflow into the gas chamber 11. The outlet flange 13 facilitates connection to an external outlet pipeline, allowing the throttled gas to be discharged. The flange detection hole 14 facilitates the installation of external sensors for pressure or leakage detection, facilitating maintenance and monitoring. The connecting seat 15 facilitates the fixed connection between the valve body assembly 1 and an external valve actuator, enabling the valve actuator to control the valve core assembly 2. The packing groove 16... The design facilitates the fixing of the sealing packing to the outside of the valve stem 21, achieving a sealing effect and preventing gas leakage during use. The valve stem 21 and connector 24 allow for easy connection of the external actuator to the connector 24, enabling the valve stem 21 to control the position of the regulating valve core 22 and regulate the flow rate. The regulating valve seat 31 is easily fixed at the bottom of the gas chamber 11, forming a sealing pair with the regulating valve core 22. The gas chamber 11 provides a flow path for gas, and the valve hole 32 facilitates the insertion of the regulating valve core 22. The main channel for gas passage, with inclined V-shaped vents 33, allows for the flow of gas within the air chamber 11 when the valve is open to the desired degree. Part of the gas flows downwards through the gap between the first sealing surface 25 and the valve orifice 32, while another part enters from the top of the vent 33, changes direction, and exits from the bottom, impacting the regulating valve core 22, forming an upward airflow. This creates an air column that obstructs the downward flow of gas, effectively improving the device's control accuracy of the medium flow rate. The four vents 33 allow for a wider valve opening, increasing the gap between the first sealing surface 25 and the valve orifice 32. The larger the gap, the stronger the air column that obstructs the downward flow of air, effectively reducing the downward flow of some gas and improving control accuracy. The buffer groove 23 facilitates the formation of a buffer chamber between the regulating valve core 22 and the valve hole 32, allowing the gas flowing downward from the gap between the first sealing surface 25 and the valve hole 32 to be temporarily stored in the buffer chamber. Since the taper of the first sealing surface 25 is smaller than that of the second sealing surface 26, the air in the buffer chamber can easily flow out from the gap between the second sealing surface 26 and the valve hole 32. The second sealing surface 26 performs secondary throttling on the airflow, further improving the accuracy of flow regulation.

[0042] 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, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An improved device for a natural gas well choke valve stem, characterized by, The valve assembly includes a valve body assembly (1), a valve seat assembly (3) is fixedly installed on the bottom inner side of the valve body assembly (1), and a valve core assembly (2) is interspersed in the middle of the valve body assembly (1) and the valve seat assembly (3). The valve core assembly (2) includes a regulating valve core (22), the valve seat assembly (3) includes a regulating valve seat (31), the valve body assembly (1) includes an air chamber (11), the regulating valve seat (31) is fixedly installed on the bottom inner side of the air chamber (11), the regulating valve seat (31) has a valve hole (32) in the middle, the regulating valve core (22) is disposed inside the valve hole (32), and the valve hole (33) has an air hole (33) at the top inner side of the valve hole (32). The air hole (33) has an inclined V-shaped structure.

2. The improved device for a natural gas well choke valve core according to claim 1, characterized in that, The air pores (33) are provided in four parts, and the air pores (33) are arranged in a ring array.

3. A choke valve insert improvement device for a natural gas well choke valve as defined in claim 2, wherein, The regulating valve core (22) has a buffer groove (23) in the middle, and the buffer groove (23) forms a first sealing surface (25) and a second sealing surface (26) on the side of the regulating valve core (22).

4. The improved device for a natural gas well choke valve according to claim 3, wherein, The inner wall of the valve hole (32) is in contact with the first sealing surface (25) and the second sealing surface (26), and the taper of the first sealing surface (25) is smaller than the taper of the second sealing surface (26).

5. The improved valve core device for a natural gas well throttle valve according to claim 4, characterized in that, The valve stem (21) is fixedly installed on the top of the regulating valve core (22), and the valve stem (21) has a connector (24) at the top.

6. The improved device for a natural gas well choke valve trim according to claim 1, wherein, An air inlet flange (12) is provided on one side of the air chamber (11). The air inlet flange (12) is connected to the interior of the air chamber (11), and the air inlet flange (12) is located on the top of the valve seat assembly (3).

7. A choke valve insert improvement device for a natural gas well choke valve as defined in claim 6 wherein, The bottom of the air chamber (11) is provided with an air outlet flange (13), which is located at the bottom of the valve seat assembly (3). Both the air inlet flange (12) and the air outlet flange (13) are provided with flange detection holes (14) on their sides.

8. A choke valve insert improvement device for a natural gas well choke valve as defined in claim 7, wherein, The top of the air chamber (11) is provided with a connecting seat (15), which is located on the outside of the valve stem (21).

9. A choke valve insert improvement device for a natural gas well choke valve as defined in claim 8, wherein, The connecting seat (15) is slidably connected to the valve stem (21), and a packing groove (16) is provided on the top of the connecting seat (15).

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