Torsion-resistant electric control cylindrical throttle valve capable of accurately controlling opening degree

Abstract

The invention discloses an anti-torsion electric control barrel type throttle valve capable of accurately controlling the opening degree. The anti-torsion electric control barrel type throttle valve comprises an anti-explosion servo motor, a precise worm and gear reducing mechanism, a valve rod nut, an integral valve rod-valve element, a valve cover and a filler seat. The throttle valve is driven by an anti-explosion servo motor, a worm and gear reducing mechanism drives a valve rod nut to rotate, a valve rod is fixed in the radial direction and cannot rotate together, and therefore the valve rod can only move linearly up and down, the relative position between a valve element and a valve seat is changed, and the throttling effect is achieved. According to the electric control cylinder type throttling valve, the opening degree of the valve can be accurately and rapidly adjusted through the servo motor and the precise worm and gear speed reducing mechanism, the valve rod and the valve element are designed to be of an integrated structure, the risk that an independent valve element loosens is avoided, the overall precision of the valve rod can be guaranteed, the service life is prolonged, the valve rod is fixed by arranging a key groove in the valve cover, and therefore the valve rod is fixed. The valve rod cannot rotate and can only move linearly up and down, and the moving precision of the valve rod is ensured. Meanwhile, the valve cover is directly connected with the valve body, so that torque generated by rotation of the valve rod is prevented from being borne by the whole throttle valve, and the whole structure is more stable.

Description

Technical Field

[0001] The invention relates to the field of cylindrical throttle valves, in particular to a torsion-resistant electrically controlled cylindrical throttle valve capable of accurately controlling the opening. Background Art

[0002] In the field of industrial fluid control, throttle valves are a key flow control device widely used in petroleum, chemical, electric power, metallurgy and other industries. Its core function is to accurately control the flow and pressure of the fluid by adjusting the opening of the valve core to meet the process requirements under different working conditions. However, traditional throttle valves have certain limitations in terms of precise control, degree of automation and safety, especially in the application of high-precision flow control and explosion-proof environments, which urgently need technical improvement and innovation.

[0003] Traditional throttle valves usually design the valve core and valve stem as two separate components, and install the valve core on the valve stem through threads, screws, etc. This method may cause the valve core to loosen during long-term use, thereby affecting the adjustment accuracy of the throttle valve. In addition, in the traditional throttle valve structure, the torque generated during its movement is often borne by a single component. This force-bearing method is not stable enough and is not conducive to long-term use. Summary of the invention

[0004] The present invention proposes a torsion-resistant electric-controlled cylindrical throttle valve with precise control of the opening. The servo motor and the precision worm gear reduction mechanism can realize the precise and rapid adjustment of the valve opening. The valve stem and the valve core are designed as an integrated structure, which avoids the risk of loosening of the individual valve core, and can ensure the overall accuracy of the valve stem and increase its service life. The valve stem is fixed by setting a keyway inside the valve cover, so that the valve stem cannot rotate and can only move up and down linearly, ensuring the movement accuracy of the valve stem. At the same time, since the valve cover is directly connected to the valve body, the torque generated by preventing the valve stem from rotating is borne by the entire throttle valve, making the overall structure more stable.

[0005] A technical solution adopted by the present invention is: to provide a torsion-resistant electric-controlled cylindrical throttle valve with precise control of opening, including an explosion-proof servo motor, a precision worm gear reduction mechanism, an integral valve stem-valve core, a valve cover, and a stuffing seat. The explosion-proof servo motor serves as the power output end, and the motor transmission shaft is connected to the precision worm gear mechanism; the precision worm gear reduction mechanism includes a worm wheel, a worm, an input shaft, an output shaft, a bearing, a key, a retaining ring, a gasket, a bearing end cover, a housing, and mounting bolts; the valve stem nut is a transmission component, with a thread inside and a keyway outside; the valve stem is a transmission component, with a thread on the upper side and a keyway on the middle side; the valve cover is connected to the valve body; the valve core is cylindrical, which is one of the core components of the throttle valve to adjust the flow; the stuffing seat and the valve seat are installed inside the valve body; the valve body is a rectangular parallelepiped, with a throttling component installed inside, and the outer surface can be connected to other pipelines through a flange.

[0006] Among them, the throttle valve is a cylindrical throttle valve, and the throttle valve opening is controlled by an explosion-proof servo motor. It can be used in flammable and explosive environments. The servo motor can achieve accurate and rapid control of the transmission shaft speed and direction.

[0007] Wherein, the transmission between the shafts is key transmission.

[0008] Among them, the precision worm gear reduction mechanism includes a worm wheel, a worm, an input shaft, an output shaft, a bearing, a key, a retaining ring, a gasket, a bearing end cover, a housing, and mounting bolts; the precision worm gear reduction mechanism adopts a worm and worm wheel meshing transmission, which significantly increases the torque while reducing the rotation speed through a specific transmission ratio, thereby providing sufficient power for the valve stem movement; the precision worm gear reduction mechanism has a power input shaft and a power output shaft, one end of the power input shaft is connected to the motor drive shaft through a key transmission, and the other end of the power input shaft is provided with a keyway hole, which can be connected to a manual handle to realize manual adjustment of the throttle valve, and the power output shaft is connected to the valve stem nut through a key transmission.

[0009] Among them, a keyway is arranged on the outside of the valve stem nut, and the horizontal rotation movement of the valve stem nut is realized through key transmission; and a thread is arranged on the inside of the valve stem nut.

[0010] Among them, the valve stem is provided with a keyway corresponding to the keyway of the valve cover, and the key prevents the valve stem from rotating and can only move up and down linearly; the side surface of the upper end of the valve stem is threaded, which cooperates with the internal thread of the valve stem nut, and the rotational motion of the valve stem nut is converted into up and down linear motion of the valve stem through the thread; the upper end of the valve stem is connected to another rod, and a small disc is connected to the upper end of the rod as a component for physically displaying the valve position.

[0011] Wherein, a valve position display cover is provided above the precision worm gear reduction mechanism, and valve opening scale lines are provided on the surface of the cover.

[0012] Among them, the valve cover is provided with a keyway inside to fix the valve stem; the valve cover is directly connected to the valve body through a flange connection, and the torque generated by the fixed valve stem is transmitted to the entire throttle valve, and the throttle valve as a whole bears the torque; the upper end of the valve cover is provided with a threaded hole, which can be connected and fixed with a precision worm gear reduction mechanism.

[0013] Wherein, the valve core is a cylindrical valve core, and the valve core is located at the lower end of the valve stem. When the valve stem moves linearly up and down, it also drives the valve core to move linearly up and down.

[0014] The valve stem and the valve core are designed as an integrated structure, which avoids the risk of loosening of the individual valve core, and can ensure the overall accuracy of the valve stem and increase its service life.

[0015] The packing seat is installed inside the valve body, and the inner wall of the packing seat contacts the outer wall of the valve core; two clamping screws are installed on the lower end surface of the packing seat, and the other end surface of the clamping screw contacts the valve seat to keep the valve seat axially fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the appearance of an electrically controlled cylindrical throttle valve for accurately controlling the opening according to an embodiment of the present invention.

[0017] Figure 2 It is a cross-sectional view of a precision worm gear reduction mechanism according to an embodiment of the present invention.

[0018] Figure 3 It is a perspective view of a cylinder type throttle valve according to an embodiment of the present invention.

[0019] Figure 4 This is an appearance diagram of the integral valve stem-valve core structure of an embodiment of the present invention.

[0020] Figure 5 This is a structural diagram of the valve cover according to an embodiment of the present invention.

[0021] Figure 6 This is a structural diagram of the valve stem nut according to an embodiment of the present invention.

[0022] Description of labels: 1. Explosion-proof servo motor; 2. Precision worm gear reduction mechanism; 3. Valve position display cover; 4. Manual handle connecting shaft; 5. Valve cover; 6. Valve body; 7. Sealing groove; 8. Throttle valve inlet end; 9. Flange hole; 10. Throttle valve outlet end; 11. Spherical roller bearing 1; 12. Worm; 13. Spherical roller bearing 2; 14. Input shaft 2; 15. Worm gear; 16. Output shaft; 17. Housing; 18. Input shaft 1; 19. Valve stem nut; 20. Valve stem keyway; 21. Packing seat; 22. Valve seat; 23. Clamping screw; 24. Valve core; 25. Thrust ball bearing; 26. Bearing gland; 27. Valve stem nut keyway; 28. Valve stem. DETAILED DESCRIPTION

[0023] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0024] Please see attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 And attached Figure 6The technical solution of the present invention provides a torsion-resistant electric-controlled cylindrical throttle valve with precise opening control, comprising an explosion-proof servo motor 1, a precision worm gear reduction mechanism 2, a valve stem nut 19, a valve stem 28, a valve cover 5, a valve core 24, a stuffing seat 21, a valve seat 22, and a valve body 6. The explosion-proof servo motor is used as a power output end, and the motor transmission shaft is connected to the precision worm gear reduction mechanism 2; the precision worm gear reduction mechanism 2 includes a worm wheel 15, a worm 12, input shafts 14 and 18, an output shaft 16, bearings 11 and 13, and a housing 17; the valve stem nut 19 is a transmission component; the valve stem 28 is a transmission component; the valve cover 5 is connected to the valve body 6 to ensure the sealing above the valve body 6; the valve core 24 is cylindrical and is one of the core components of the throttle valve to adjust the flow; the stuffing seat 21 and the valve seat 22 are installed inside the valve body 6; the valve body 6 is a rectangular parallelepiped, and the throttling component is installed inside, and the outer surface can be connected to other pipelines through the flange hole 9.

[0025] The valve body is provided with a sealing groove 7, in which a metal sealing ring can be installed to achieve sealing under high pressure conditions.

[0026] The valve stem nut 18 is provided with a keyway 27 on the outside, and the horizontal rotation of the valve stem nut 18 is achieved through key transmission; the valve stem nut 18 is provided with a thread on the inside.

[0027] The valve stem 28 and the valve core 24 are an integrated structure, and the valve stem 28 is provided with a keyway 20 .

[0028] A valve position display cover 3 is provided above the precision worm gear reduction mechanism 2, and valve opening scale lines are provided on the surface of the valve position display cover 3.

[0029] The input shaft 14 of the precision worm gear reduction mechanism 2 is connected to the manual handle connecting shaft 4.

[0030] The throttle valve is provided with a throttle valve inlet end 8 and a throttle valve outlet end 10 .

[0031] The working principle of the electronically controlled cylindrical throttle valve with precise opening control described in the technical solution of the present invention will be described below in conjunction with specific implementation methods: As a power component for controlling the opening of the throttle valve, the explosion-proof servo motor 1 can be used in an inflammable and explosive environment, and can realize accurate and rapid control of the speed and direction of the transmission shaft. When the transmission shaft of the explosion-proof servo motor 1 rotates, its rotational motion is transmitted to the input shaft 18 through the key, so that the worm 12 produces the same rotational motion as the transmission shaft of the explosion-proof servo motor 1. The worm 12 is meshed with the worm wheel 15 and has a specific transmission ratio, which reduces the speed of the transmission shaft of the explosion-proof servo motor 1, increases the torque, and changes the vertical rotational motion of the transmission shaft of the explosion-proof servo motor 1 into a horizontal rotational motion. The output shaft 16 of the precision worm gear reduction mechanism 2 transmits the horizontal rotational motion to the valve stem nut 19 through the key. The side of the valve stem 28 is provided with a thread that matches the internal thread of the valve stem nut 19, and the valve stem 28 is fixed by the key and cannot perform rotational motion. Therefore, when the valve stem nut 19 performs horizontal rotational motion, the valve stem 28 performs up and down linear motion. Whether it is upward or downward depends on whether the direction of the transmission shaft of the explosion-proof servo motor 1 is clockwise or counterclockwise. The valve core 24 and the valve stem 28 are an integrated structure, so the valve core 24 will also produce the same upward or downward linear motion as the valve stem 28. The valve seat 22 is fixed, the valve core 24 moves, and the relative position of the valve core 24 and the valve seat 22 changes, and the throttling area of ​​the throttling valve changes.

[0032] When the fluid enters from the throttle valve inlet end 8 and flows through the space between the valve core 24 and the valve seat 22, the relative position of the valve core 24 and the valve seat 22 can be adjusted by the body to adjust the throttling area and change the fluid flow rate flowing out from the throttle valve outlet end 10.

[0033] Through the technical solution of the present invention, the electronically controlled cylindrical throttle valve of the present invention can realize accurate and rapid adjustment of the valve opening through the servo motor and the precision worm gear reduction mechanism. The valve stem and the valve core are designed as an integrated structure, which avoids the risk of loosening of the individual valve core, and can ensure the overall accuracy of the valve stem and increase the service life. The valve stem is fixed by setting a keyway inside the valve cover, so that the valve stem cannot rotate and can only move up and down linearly, ensuring the movement accuracy of the valve stem. At the same time, since the valve cover is directly connected to the valve body, the torque generated by preventing the valve stem from rotating is borne by the entire throttle valve, making the overall structure more stable.

[0034] The present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the structure and principle of the present invention. The present invention may be improved and varied, and these improvements and variations shall all fall within the protection scope of the appended claims of the present invention.

Claims

1. A torsion-resistant electronically controlled cylindrical throttle valve with precise opening control, characterized in that: It includes an explosion-proof servo motor, a precision worm gear reduction mechanism, a valve stem nut, an integral valve stem-valve core, a valve cover, and a packing seat. The precision worm gear reduction mechanism adopts a worm and a worm wheel meshing transmission. While reducing the speed through the transmission ratio, it significantly increases the output torque and provides sufficient power for the valve core to move. The precision worm gear reduction mechanism has a power input shaft and a power output shaft. One end of the power input shaft is connected to the motor drive shaft through a key transmission. The other end of the power input shaft is provided with a keyway hole, which can be connected to a manual handle to realize manual adjustment of the throttle valve. The power output end is connected to the valve stem nut The valve stem is connected to the valve cover through a key, and the rotation of the valve stem nut is converted into up and down linear motion of the valve stem through the thread. The upper end of the valve stem is connected to another rod, which moves with the valve stem to display the valve position in real time. A keyway is provided inside the valve cover to fix the valve stem, and the valve cover is connected to the valve body through a flange connection. A threaded hole is provided on the upper end of the valve cover, which can be connected and fixed to a precision worm gear reduction mechanism.

2. According to claim 1, the highly torsion-resistant electrically controlled cylindrical throttle valve with precise opening control is characterized in that: The throttle valve is a cylindrical throttle valve, and the throttle valve opening is controlled by an explosion-proof servo motor. It can be used in flammable and explosive environments. The servo motor can achieve accurate and rapid regulation of the speed and direction of the transmission shaft.

3. According to claim 1, the torsion-resistant electronically controlled cylindrical throttle valve with precise opening control is characterized in that: The valve core is a cylindrical valve core, and the valve core and the valve stem are an integrated structure, which avoids the risk of loosening of the single valve core, ensures the movement accuracy of the valve stem, and increases the service life; a keyway is set inside the valve cover to fix the valve stem, so that the valve stem cannot rotate and can only move linearly up and down, ensuring the movement accuracy of the valve stem. At the same time, since the valve cover is directly connected to the valve body, the torque generated by preventing the valve stem from rotating is borne by the entire throttle valve, making the overall structure more stable.

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