Integrated axial flow control valve

Abstract

The utility model provides an integrated axial flow control valve, which relates to the technical field of valves and comprises a main valve body, an inlet cavity, a valve cavity and an outlet cavity, the inlet cavity, the valve cavity and the outlet cavity are sequentially communicated in the main valve body, a valve core is arranged in the outlet cavity, a piston shaft is in sliding connection with the inlet cavity and the outlet cavity, and a sliding disc is arranged on the peripheral side of the piston shaft. The sliding disc is in sliding connection with the valve cavity, the piston shaft is of a hollow structure, one end of the piston shaft is arranged on the valve element in a sleeving mode, an air inlet and an air outlet are formed in the main valve body, the air source is communicated with the air inlet, a through hole is formed in the main valve body, and the valve position feedback rod penetrates through the through hole and is connected with the sliding disc. The piston shaft is arranged in the main valve body, the piston shaft and the valve body are combined together by forming holes in the main valve body, ventilating and controlling the piston shaft to move, the size of the control valve is reduced, the flowing path of a medium in the control valve is a straight line, the whole flowing channel does not have dead angles, the medium flows more smoothly, and the working efficiency of the control valve is improved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to an integrated axial flow control valve. Background Technology

[0002] Control valves are mainly used in automated control systems to control parameters such as fluid flow, pressure, and temperature. A conventional control valve consists of an actuator and a valve body. The actuator drives the valve core within the valve body. While the separate design of the actuator and valve body allows for flexible assembly, it also results in a larger overall size, higher manufacturing costs, and installation limitations. Furthermore, the actuator's movement accuracy is relatively poor, affecting the valve's opening and closing precision. Additionally, the internal flow channels of the valve body are often S-shaped or olive-shaped, creating dead zones that hinder normal fluid flow and reduce valve control accuracy. Utility Model Content

[0003] The problem this invention aims to solve is how to optimize the structure of the control valve, reduce its size, and improve its opening and closing accuracy.

[0004] Therefore, this utility model provides an integrated axial flow control valve, including a main valve body, a piston shaft, a valve core, a valve position feedback rod, and an air source. The main valve body includes an inlet chamber, a valve chamber, and an outlet chamber connected in sequence. The diameter of the valve chamber is larger than the diameters of the inlet chamber and the outlet chamber. The valve core is disposed in the outlet chamber, and the peripheral outer surface of the valve core is spaced apart from the peripheral surface of the outlet chamber. The piston shaft passes through the inlet chamber, the valve chamber, and the outlet chamber. Both ends of the piston shaft are slidably connected to the peripheral surfaces of the inlet chamber and the outlet chamber, respectively. A sliding disc is provided on the periphery of the piston shaft, and the sliding disc is connected to the peripheral surface of the valve chamber. The valve body is slidably connected, with the piston shaft being a hollow structure extending through both ends. One end of the piston shaft is slidably fitted onto the circumferential surface of the valve core. An air inlet and an air outlet are provided on the side wall of the main valve body. The air inlet and the air outlet are located on one side of the sliding plate, while the air outlet and the air inlet are located on the other side of the sliding plate. The air source is connected to the air inlet. A through hole is provided at one end of the main valve body, through which a valve position feedback rod partially passes and is connected to the sliding plate. The extension direction of the valve position feedback rod is the same as the axial direction of the main valve body, and the valve position feedback rod is used to detect the position of the piston shaft.

[0005] Optionally, the integrated axial flow control valve also includes a spring, which is sleeved on the circumferential side of the piston shaft. The spring and the air outlet are located on one side of the sliding disc, and the valve position feedback rod and the air inlet are located on the other side of the sliding disc. The two ends of the spring are respectively connected to the inner wall of the sliding disc and the main valve body.

[0006] Optionally, a first annular groove is provided inside the main valve body at one end near the inlet cavity, and one end of the spring is embedded in the first annular groove.

[0007] Optionally, the integrated axial flow control valve further includes a fixed guide plate located inside the outlet cavity and coaxially arranged with the outlet cavity. The peripheral surface of the fixed guide plate is provided with a connecting plate extending away from the axis of the main valve body. The connecting plate is connected to the peripheral surface of the outlet cavity, and the valve core is connected to the side of the fixed guide plate facing the inlet cavity.

[0008] Optionally, the valve core and the fixed guide plate are respectively provided with a boss and a groove on their opposite end faces, and the boss is embedded in the groove.

[0009] Optionally, the integrated axial flow control valve further includes a threaded component. The valve core has a first threaded hole that penetrates the valve core, and the fixed guide plate has a second threaded hole on its end face facing the valve core. The first threaded hole and the second threaded hole are respectively inserted into one of the boss and the groove, and the threaded component is sequentially threaded to the first threaded hole and the second threaded hole.

[0010] Optionally, the integrated axial flow control valve further includes an annular sealing gasket. A second annular groove is formed on the side of the valve core facing the fixed guide plate or on the side of the fixed guide plate facing the valve core. The annular sealing gasket is disposed in the second annular groove. The inner edge of the annular sealing gasket abuts against the outer edge of the boss. The two end faces of the annular sealing gasket abut against the valve core and the fixed guide plate, respectively.

[0011] Optionally, the integrated axial flow control valve also includes noise reduction orifice plates, with multiple noise reduction orifice plates respectively disposed in the inlet chamber and the outlet chamber.

[0012] Optionally, the integrated axial flow control valve also includes a control system and a positioner, wherein the control system is communicatively connected to the positioner, the air source, and the valve position feedback rod.

[0013] Optionally, the main valve body includes a first valve body, a second valve body, and a third valve body that are bolted together in sequence, with the inlet cavity located in the first valve body, the valve chamber located in the second valve body, and the outlet cavity located in the third valve body.

[0014] Compared with the prior art, the advantages of the integrated axial flow control valve of this utility model are:

[0015] This invention divides the inner cavity of the main valve body into an inlet chamber, a valve chamber, and an outlet chamber, with different diameters from the inlet to the outlet. The inlet and outlet chambers have the same diameter, while the valve chamber has a larger diameter than both the inlet and outlet chambers. The valve core is a cylindrical structure located within the outlet chamber and coaxially aligned with it. The valve core diameter is smaller than the outlet chamber diameter, and a gap exists between the outer circumferential surface of the valve core and the outer circumferential surface of the outlet chamber. A piston shaft is also provided within the inlet, valve, and outlet chambers. The piston shaft is hollow, and its inner diameter is the same as the outer diameter of the valve core. The end of the piston shaft facing the valve core can be fitted around the valve core to seal that end. The outer diameter of the piston shaft... With the same diameter as the inlet and outlet chambers, the piston shaft can slide axially relative to the inlet and outlet chambers along the main valve body axis, disengaging the piston shaft from the valve core and thus releasing the seal at one end. A sliding disc is located on the circumferential side of the piston shaft within the valve cavity, with the same diameter as the valve cavity. As the piston shaft slides, the sliding disc also slides within the valve cavity. An air inlet and outlet are located on the circumferential surface of the main valve body corresponding to the valve cavity. The air inlet and outlet are located on one side of the sliding disc, and the air outlet and inlet are located on the other side. An air source is connected to the air inlet. When air is supplied, gas enters the valve cavity, pushing the sliding disc towards the air outlet. In other words, by supplying air, the piston shaft can be driven towards the outlet. The valve slides in the direction of the inlet cavity. A through hole is provided on the end face of the main valve body facing the inlet or outlet cavity. The valve position feedback rod extends into the valve cavity through the through hole. One end of the valve position feedback rod is connected to the sliding disc, and the other end is located outside the main valve body. The extension direction of the valve position feedback rod is the same as the extension direction of the main valve body, facilitating the movement of the valve position feedback rod with the sliding disc. When the control valve is closed, the piston shaft is sleeved on the valve core. The medium enters the main valve body from the inlet cavity and moves along the internal cavity of the piston shaft until it reaches the valve core. When the control valve needs to be opened, the air source supplies air to the air inlet. The air pressure pushes the sliding disc, causing the piston shaft to slide in the direction of the inlet cavity, disengaging the piston shaft. The medium can pass through the gap between the piston shaft and the valve core and flow out from the outlet. During this process, the valve position feedback rod moves with the piston shaft and detects the opening degree of the piston shaft relative to the valve core, making the control valve opening more precise. This utility model sets the piston shaft, which serves as the actuator, in the main valve body and controls the movement of the piston shaft by opening a hole in the main valve body for air passage. This combines the actuator and the valve body, reducing the size of the control valve and making it easier to install. At the same time, the medium can flow inside the piston shaft, which serves as the actuator. The flow path of the medium in the control valve is straight, and there are no dead corners in the entire flow channel, making the medium flow more smoothly and improving the working efficiency of the control valve. Attached Figure Description

[0016] Figure 1 This is one of the structural schematic diagrams of the integrated axial flow control valve described in this utility model embodiment;

[0017] Figure 2This is a second schematic diagram of the integrated axial flow control valve described in this embodiment of the present invention;

[0018] Figure 3 for Figure 2 Enlarged view of section I in the middle.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1-Main valve body; 11-Inlet cavity; 12-Valve cavity; 13-Outlet cavity; 14-Air inlet; 15-Air outlet; 16-First annular groove; 17-First valve body; 18-Second valve body; 19-Third valve body; 2-Piston shaft; 21-Sliding disc; 3-Valve core; 4-Valve position feedback rod; 5-Positioner; 6-Spring; 7-Fixed guide plate; 81-Boss; 82-Threaded part; 83-Annular sealing gasket; 9-Noise reduction orifice plate. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] It should be noted that in the description of this utility model, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "top", "bottom", "front", "back", "inner" and "outer" is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this utility model, and is not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this utility model.

[0023] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0024] Furthermore, although specific embodiments have been described herein with reference to them, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that different dependent claims and features herein can be combined in ways not used as described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other embodiments.

[0025] To solve the above problems, such as Figures 1 to 3As shown, this utility model provides an integrated axial flow control valve, including a main valve body 1, a piston shaft 2, a valve core 3, a valve position feedback rod 4, and an air source. The main valve body 1 includes an inlet chamber 11, a valve chamber 12, and an outlet chamber 13 connected in sequence. The diameter of the valve chamber 12 is larger than the diameters of the inlet chamber 11 and the outlet chamber 13. The valve core 3 is disposed in the outlet chamber 13, and the outer peripheral surface of the valve core 3 is spaced apart from the peripheral surface of the outlet chamber 13. The piston shaft 2 passes through the inlet chamber 11, the valve chamber 12, and the outlet chamber 13. The two ends of the piston shaft 2 are slidably connected to the peripheral surfaces of the inlet chamber 11 and the outlet chamber 13, respectively. A sliding disc 21 is provided on the periphery of the piston shaft 2, and the sliding disc 21 is connected to the valve chamber 1. The piston shaft 2 is a hollow structure with both ends through it. One end of the piston shaft 2 is used to slide on the peripheral surface of the valve core 3. The main valve body 1 has an air inlet 14 and an air outlet 15 on its side wall. The air inlet 14 and the air outlet 13 are located on one side of the sliding plate 21, and the air outlet 15 and the air inlet 11 are located on the other side of the sliding plate 21. The air source is connected to the air inlet 14. One end of the main valve body 1 has a through hole. The valve position feedback rod 4 is partially inserted through the through hole and connected to the sliding plate 21. The extension direction of the valve position feedback rod 4 is the same as the axial direction of the main valve body 1. The valve position feedback rod 4 is used to detect the position of the piston shaft 2.

[0026] In this embodiment, the inner cavity of the main valve body 1 is divided into an inlet cavity 11, a valve cavity 12, and an outlet cavity 13 according to their diameters from the inlet to the outlet. The inlet cavity 11 and the outlet cavity 13 have the same diameter, while the valve cavity 12 has a larger diameter than both the inlet cavity 11 and the outlet cavity 13. The valve core 3 is a cylindrical structure located inside the outlet cavity 13 and coaxially arranged with it. The diameter of the valve core 3 is smaller than that of the outlet cavity 13, and there is a gap between the outer peripheral surface of the valve core 3 and the peripheral surface of the outlet cavity 13. A piston shaft 2 is also provided inside the inlet cavity 11, the valve cavity 12, and the outlet cavity 13. The piston shaft 2 is a hollow structure, and its inner diameter is the same as the outer diameter of the valve core 3. One end of the piston shaft 2 facing the valve core 3 can be sleeved around the valve core 3, so that one end of the piston shaft 2... The piston shaft 2 is sealed by the valve core 3. The outer diameter of the piston shaft 2 is the same as the diameter of the outlet cavity 13 and the diameter of the inlet cavity 11. The piston shaft 2 can slide relative to the inlet cavity 11 and the outlet cavity 13 along the axial direction of the main valve body 1, so that the piston shaft 2 is disengaged from the valve core 3, thereby releasing the seal at one end. A sliding disk 21 is provided on the circumference of the part of the piston shaft 2 located in the valve cavity 12. The diameter of the sliding disk 21 is the same as the diameter of the valve cavity 12. When the piston shaft 2 slides, the sliding disk 21 also slides in the valve cavity 12. An air inlet 14 and an air outlet 15 are opened on the circumferential surface of the main valve body 1 corresponding to the valve cavity 12. The air inlet 14 and the outlet cavity 13 are located on one side of the sliding disk 21, and the air outlet 15 and the inlet cavity 11 are located on the other side of the sliding disk 21. An air source is provided to communicate with the air inlet 14. When air is supplied, the gas enters... Entering the valve chamber 12, the sliding disc 21 is pushed towards the air outlet 15. This allows air to pass through, driving the piston shaft 2 to slide towards the inlet cavity 11. A through hole is provided on the end face of the main valve body 1 facing the inlet cavity 11 or outlet cavity 13 corresponding to the valve chamber 12. The valve position feedback rod 4 extends into the valve chamber 12 through the through hole. One end of the valve position feedback rod 4 is connected to the sliding disc 21, while the other end is located outside the main valve body 1. The extension direction of the valve position feedback rod 4 is the same as that of the main valve body 1, facilitating its movement with the sliding disc 21. When the control valve is closed, the piston shaft 2 is sleeved on the valve core 3. The medium enters the main valve body 1 from the inlet cavity 11 and moves along the internal cavity of the piston shaft 2. Before reaching the valve core 3, the control valve needs to be opened. When the valve is operated, air is supplied to the air inlet 14. The air pressure pushes the sliding disc 21, causing the piston shaft 2 to slide towards the inlet cavity 11. The piston shaft 2 disengages from the valve core 3, allowing the medium to pass through the gap between the piston shaft 2 and the valve core 3 and flow out from the outlet cavity 13. During this process, the valve position feedback rod 4 moves with the piston shaft 2 and detects the opening degree of the piston shaft 2 relative to the valve core 3, making the valve opening more precise. In this invention, the piston shaft 2, which serves as the actuator, is located inside the main valve body 1. By opening a hole in the main valve body 1 to allow air to flow and control the movement of the piston shaft 2, the actuator and the valve body are combined, reducing the size of the control valve and making it easier to install. At the same time, the medium can flow inside the piston shaft 2, which serves as the actuator, and the flow path of the medium within the control valve is straight.The entire flow path has no dead zones, ensuring smoother media flow and improving the efficiency of the control valve.

[0027] Specifically, when the medium flows through the gap between the valve core 3 and the piston shaft 2, due to the pressure difference before and after the valve core 3, an unbalanced force is generated, causing the valve core 3 to move from the high-pressure area to the low-pressure area. The force-bearing area of ​​the valve core 3 in this invention is very small, so the unbalanced force is very small and it can withstand a larger pressure difference of unbalanced force. The medium flows from inside the piston shaft 2 and is not easy to leak out. A first sealing ring can be provided between the piston shaft 2 and the peripheral surface of the inlet cavity 11 and the peripheral surface of the outlet cavity 13 to improve the sealing performance. The first sealing ring can balance the air pressure in the main valve chamber 12 and the fluid pressure in the inlet cavity 11 and the outlet cavity 13, thereby improving the life of the control valve. A second sealing ring is also provided between the valve position feedback rod 4 and the through hole, and between the sliding plate 21 and the peripheral surface of the valve chamber 12 to improve the gas sealing performance. This invention can be used with a maximum gas source pressure of 0.6 MPaG, and the gas thrust is large, making it easier to overcome the unbalanced force of the medium. This invention can adjust the flow rate when the piston shaft 2 is separated from the valve core 3 by replacing the valve core 3 and the piston shaft 2 with different diameters.

[0028] Optionally, such as Figure 2 As shown, the integrated axial flow control valve also includes a spring 6, which is sleeved on the periphery of the piston shaft 2. The spring 6 and the air outlet 15 are located on one side of the sliding plate 21, and the valve position feedback rod 4 and the air inlet 14 are located on the other side of the sliding plate 21. The two ends of the spring 6 are respectively connected to the inner wall of the sliding plate 21 and the main valve body 1.

[0029] In this embodiment, a spring 6 is installed within the portion of the valve cavity 12 with the air outlet 15. The spring 6 is sleeved around the piston shaft 2 and supported between the sliding disc 21 and the end face of the main valve body 1 facing the inlet cavity 11. The elastic force of the spring 6 pushes the sliding disc 21 towards the outlet cavity 13, causing one end of the piston shaft 2 facing the outlet cavity 13 to be sleeved on the valve core 3 and pressed tightly, so that the control valve is always in the closed state when no air is supplied. The valve position feedback rod 4 is located on the side of the sliding disc 21 away from the spring 6, which can avoid interference with the spring 6.

[0030] Optionally, such as Figure 2 As shown, a first annular groove 16 is provided inside the main valve body 1 at one end near the inlet cavity 11, and one end of the spring 6 is embedded in the first annular groove 16.

[0031] In this embodiment, a first annular groove 16 is formed at one end of the main valve body 1 facing the inlet cavity 11, and the end of the spring 6 away from the sliding disk 21 is embedded in the first annular groove 16. The first annular groove 16 limits the spring 6 and prevents the spring 6 from sliding radially along the main valve body 1.

[0032] Optionally, such as Figure 2 and Figure 3 As shown, the integrated axial flow control valve also includes a fixed guide plate 7, which is located inside the outlet cavity 13 and is coaxially arranged with the outlet cavity 13. The peripheral surface of the fixed guide plate 7 is provided with a connecting plate extending away from the axis of the main valve body 1. The connecting plate is connected to the peripheral surface of the outlet cavity 13. The valve core 3 is connected to the side of the fixed guide plate 7 facing the inlet cavity 11.

[0033] In this embodiment, a fixed guide plate 7 is provided inside the outlet cavity 13. The fixed guide plate 7 is a circular plate and is coaxially arranged with the outlet cavity 13. A connecting plate extending towards the peripheral surface of the outlet cavity 13 is provided at the peripheral edge of the fixed guide plate 7. The connecting plate is connected to the peripheral surface of the outlet cavity 13. The gap between the fixed guide plate 7 and the peripheral surface of the outlet cavity 13, except for the connecting plate, allows the medium to pass through. The fixed guide plate 7 is fixed on the axis of the outlet cavity 13. The valve core 3 is connected to the end of the fixed guide plate 7 facing the inlet cavity 11, so that the valve core 3 is fixed on the peripheral surface of the outlet cavity 13 by the fixed guide plate 7, which facilitates the fixation of the position of the valve core 3, so that the piston shaft 2 can be sleeved on the valve core 3 or smoothly disengaged from the valve core 3.

[0034] Specifically, there can be multiple connecting plates, which are evenly distributed around the fixed guide plate 7. The end of the fixed guide plate 7 away from the valve core 3 can be set in a spindle shape to facilitate the flow of the medium.

[0035] Optionally, such as Figure 3 As shown, the valve core 3 and the fixed guide plate 7 are respectively provided with a boss 81 and a groove on their opposite end faces, and the boss 81 is embedded in the groove.

[0036] In this embodiment, a boss 81 and a groove are provided on the opposing surfaces of the valve core 3 and the fixed guide plate 7. For example, a groove is provided on the end face of the valve core 3 facing the fixed guide plate 7, and a boss 81 is provided on the end face of the fixed guide plate 7 facing the valve core 3. Alternatively, a boss 81 is provided on the end face of the valve core 3 facing the fixed guide plate 7, and a groove is provided on the end face of the fixed guide plate 7 facing the valve core 3. The boss 81 is embedded in the groove to position and connect the valve core 3 and the fixed guide plate 7 together.

[0037] Optionally, such as Figure 3 As shown, the integrated axial flow control valve also includes a threaded component 82. The valve core 3 is provided with a first threaded hole that penetrates the valve core 3. The fixed guide plate 7 is provided with a second threaded hole on its end face facing the valve core 3. The first threaded hole and the second threaded hole are respectively provided in one of the boss 81 and the groove. The threaded component 82 is sequentially threadedly connected to the first threaded hole and the second threaded hole.

[0038] In this embodiment, a first threaded hole extending axially along the main valve body 1 is provided on the valve core 3. The first threaded hole is a through hole. A second threaded hole is provided on the end face of the fixed guide plate 7 facing the valve core 3. The second threaded hole is a blind hole. The first threaded hole and the second threaded hole are respectively provided in one of the boss 81 and the groove. For example, the valve core 3 is provided with a groove and the fixed guide plate 7 is provided with a boss 81. Then the first threaded hole passes through the groove and the second threaded hole passes through the boss 81. When the valve core 3 and the fixed guide plate 7 are connected, the valve core 3 is first positioned by the boss 81 and the groove, and then the threaded part 82 is passed through the first threaded hole and the second threaded hole in sequence to connect the valve core 3 and the fixed guide plate 7 together, thereby improving the stability of the connection. The threaded part 82 can be a screw or a bolt.

[0039] Optionally, such as Figure 3 As shown, the integrated axial flow control valve also includes an annular sealing gasket 83. A second annular groove is formed on the side of the valve core 3 facing the fixed guide plate 7 or on the side of the fixed guide plate 7 facing the valve core 3. The annular sealing gasket 83 is disposed in the second annular groove. The inner edge of the annular sealing gasket 83 abuts against the outer edge of the boss 81. The two end faces of the annular sealing gasket 83 abut against the valve core 3 and the fixed guide plate 7, respectively.

[0040] In this embodiment, a second annular groove is formed on the valve core 3 or the fixed guide plate 7 with a boss 81. For example, the boss 81 is set on the fixed guide plate 7, and a second annular groove is formed on the side end face of the fixed guide plate 7 facing the valve core 3, located around the boss 81. An annular sealing gasket 83 is set in the second annular groove. When the valve core 3 and the fixed guide plate 7 are connected, the inner edge (inner edge of the annular ring) of the annular sealing gasket 83 abuts against the outer edge (outer edge of the annular ring) of the boss 81, and the two end faces of the annular sealing gasket 83 abut against the valve core 3 and the fixed guide plate 7 respectively, thereby improving the sealing performance between the valve core 3 and the fixed guide plate 7.

[0041] Optionally, such as Figure 2 As shown, the integrated axial flow control valve also includes noise reduction orifice plates 9, and multiple noise reduction orifice plates 9 are respectively disposed in the inlet chamber 11 and the outlet chamber 13.

[0042] In this embodiment, noise reduction orifice plates 9 are provided in the inlet chamber 11 and the outlet chamber 13. The noise reduction orifice plate 9 in the outlet chamber 13 is located on the side of the fixed guide plate 7 away from the valve core 3. The medium first passes through a layer of noise reduction orifice plate 9, then enters the piston shaft 2, passes through the valve core 3, and then passes through another layer of noise reduction orifice plate 9 before flowing out of the outlet chamber 13. The noise reduction orifice plate 9 can not only reduce noise, but also reduce the speed and pressure of the medium. The more stages there are, the more obvious the pressure reduction and deceleration effect will be, realizing the multi-stage pressure reduction effect under high pressure difference, more accurately controlling the flow rate, and improving the control accuracy and response speed of the control valve.

[0043] Specifically, the number of noise reduction perforated plates 9 in the inlet oral cavity 11 and the outlet oral cavity 13 can be multiple.

[0044] Optionally, the integrated axial flow control valve also includes a control system and a positioner, wherein the control system is communicatively connected to the positioner 5, the air source, and the valve position feedback rod 4.

[0045] In this embodiment, a control system, such as a DCS (Distributed Control System) and a positioner 5 are set up. The positioner 5 is connected to the outside of the main valve body 1. The position information detected by the valve position feedback rod 4 is transmitted to the control system. The control system sends a signal to the positioner 5 to control the positioner 5 to adjust the air supply pressure of the air source. Together with the valve position feedback rod 4, the positioner 5 controls the opening degree of the piston shaft 2 relative to the valve core 3, so that the valve opening is more precise.

[0046] Optionally, such as Figure 2 As shown, the main valve body 1 includes a first valve body 17, a second valve body 18, and a third valve body 19 that are bolted together in sequence. The inlet cavity 11 is located inside the first valve body 17, the valve cavity 12 is located inside the second valve body 18, and the outlet cavity 13 is located inside the third valve body 19.

[0047] In this embodiment, the main valve body 1 is divided into a first valve body 17, a second valve body 18, and a third valve body 19. The inlet cavity 11 is located in the first valve body 17, the valve cavity 12 is located in the second valve body 18, and the outlet cavity 13 is located in the third valve body 19. The first valve body 17 is bolted to the second valve body 18, and the second valve body 18 is bolted to the third valve body 19. This allows the main valve body 1 to be disassembled, making it easier to install the piston shaft 2, valve core 3, and spring 6 into the control valve, thus facilitating the assembly of the control valve.

[0048] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. An integrated axial flow control valve characterized by, The utility model provides a valve, including main valve body (1), piston axle (2), valve element (3), valve position feedback rod (4) and gas source, the inside of main valve body (1) includes inlet chamber (11), valve chamber (12) and outlet chamber (13) that communicate in proper order, the diameter of valve chamber (12) is greater than the diameter of inlet chamber (11) and outlet chamber (13), valve element (3) is arranged in outlet chamber (13), the outer surface of the circumference of valve element (3) is spaced apart with the circumference of outlet chamber (13), piston axle (2) is set up in inlet chamber (11), valve chamber (12) and outlet chamber (13), and the both ends of piston axle (2) are slidably connected with the circumference of inlet chamber (11) and outlet chamber (13) respectively, and the circumference of piston axle (2) is equipped with sliding disc (21), and sliding disc (21) is slidably connected with the circumference of valve chamber (12), and piston axle (2) is hollow structure and is penetrated in both ends, and one end of piston axle (2) is used for slidingly setting on the circumference of valve element (3), and the side wall of main valve body (1) is equipped with air inlet hole (14) and air outlet hole (15), and air inlet hole (14) and outlet chamber (13) are located on one side of sliding disc (21), and air outlet hole (15) and inlet chamber (11) are located on the other side of sliding disc (21), and the gas source is communicated with air inlet hole (14), and one end of main valve body (1) is equipped with through hole, and valve position feedback rod (4) is partially set up in through hole and is connected with sliding disc (21), and the extension direction of valve position feedback rod (4) is same with the axial direction of main valve body (1), and valve position feedback rod (4) is used to detect the position of piston axle (2).

2. The integrated variable diffuser control valve of claim 1, wherein, It further includes a spring (6) sleeved on the circumference of the piston axle (2), the spring (6) and the air outlet hole (15) are located on one side of the sliding disc (21), the valve position feedback rod (4) and the air inlet hole (14) are located on the other side of the sliding disc (21), and the both ends of the spring (6) are connected with the sliding disc (21) and the inner wall of the main valve body (1) respectively.

3. The integrated variable diffuser control valve of claim 2, wherein, The inside of one end of the main valve body (1) close to the inlet chamber (11) is provided with a first annular groove (16), and one end of the spring (6) is embedded in the first annular groove (16).

4. The integrated variable diffuser control valve of claim 1, wherein, It further includes a fixed flow guide plate (7) located in the outlet chamber (13) and coaxially arranged with the outlet chamber (13), the circumference of the fixed flow guide plate (7) is provided with a connecting plate extending away from the axial direction of the main valve body (1), the connecting plate is connected with the circumference of the outlet chamber (13), and the valve element (3) is connected with one side of the fixed flow guide plate (7) facing the inlet chamber (11).

5. The integrated variable diffuser control valve of claim 4, wherein, The opposite end faces of the valve element (3) and the fixed flow guide plate (7) are respectively provided with a boss (81) and a groove, and the boss (81) is embedded in the groove.

6. The integrated variable diffuser control valve of claim 5, wherein, Further comprising a threaded part (82), the valve core (3) is provided with a first threaded hole penetrating the valve core (3), the fixed flow guide plate (7) is provided with a second threaded hole on the end face facing the valve core (3), the first threaded hole and the second threaded hole are respectively threaded in one of the boss (81) and the groove, and the threaded part (82) is sequentially threaded with the first threaded hole and the second threaded hole.

7. The integrated variable diffuser control valve of claim 5, wherein, Further comprising an annular sealing gasket (83), one side of the valve core (3) facing the fixed flow guide plate (7) or one side of the fixed flow guide plate (7) facing the valve core (3) is provided with a second annular groove, the annular sealing gasket (83) is arranged in the second annular groove, the inner edge of the annular sealing gasket (83) abuts against the outer edge of the boss (81), and the two end faces of the annular sealing gasket (83) respectively abut against the valve core (3) and the fixed flow guide plate (7).

8. The integrated variable diffuser control valve of claim 1, wherein, Further comprising a noise reduction hole plate (9), a plurality of noise reduction hole plates (9) are respectively arranged in the inlet cavity (11) and the outlet cavity (13).

9. The integrated variable diffuser control valve of claim 1, wherein, Further comprising a control system and a positioner (5), the control system is in communication connection with the positioner (5), the air source and the valve position feedback rod (4).

10. The integrated variable diffuser control valve of any one of claims 1-9, wherein, The main valve body (1) comprises a first valve body (17), a second valve body (18) and a third valve body (19) which are sequentially bolted, the inlet cavity (11) is located in the first valve body (17), the valve cavity (12) is located in the second valve body (18), and the outlet cavity (13) is located in the third valve body (19).

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