Corrosion-resistant quick-response automatic spray control valve

Abstract

This utility model discloses a corrosion-resistant, fast-response automatic spray control valve, belonging to the field of control valve technology. It includes a valve body with an inlet pipe at the bottom and an outlet pipe at the top of its side wall, and a nozzle installed on the outlet pipe. The valve body's inner cavity, enclosed by a partition plate, forms a cylindrical space containing a valve core. An actuator mounted on the top of the valve body drives the valve core via its pull rod. A return spring is provided at the bottom of the valve core. An annular plate on the top of the valve core contacts the inclined surface of the partition plate, and both the annular plate and the inclined surface of the partition plate have slotted holes. A rotatable sealing plate is installed at the bottom of the partition plate. A manual assembly for driving the sealing plate is installed at the bottom of the valve body. Both the sealing plate and the valve body are designed with sealing components to achieve a sealing function. This utility model designs a control valve that maintains millisecond-level fast response capability, possesses strong corrosion resistance, and integrates manual emergency operation.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, and in particular to a corrosion-resistant, fast-response automatic spray control valve. Background Technology

[0002] Automatic spray control valves, as key actuators in fluid control systems, are widely used in many industrial fields, such as quantitative reagent addition in chemical production lines, precise spraying of etching solutions in semiconductor manufacturing, automated pesticide application in agriculture, and spraying of desulfurization and denitrification agents in environmental protection equipment. These applications often require valves to not only open and close quickly and accurately to achieve strict control over spraying time and dosage, but also to possess excellent corrosion resistance when facing strong acids, strong alkalis, and oxidants.

[0003] Most automatic spray valves rely on electromagnetic or pneumatic actuators to operate in a single mode. If the actuator fails, the control signal is interrupted, or there is a problem with the power or air supply on site, the entire valve will fail completely and no manual emergency intervention can be performed. In continuous production or emergency handling conditions, this design, due to its low fault tolerance and lack of necessary emergency handling measures, may cause the entire production line to stop or miss the best handling opportunity. Utility Model Content

[0004] The purpose of this invention is to design a control valve that can maintain millisecond-level fast response capability, has strong corrosion resistance, and integrates manual emergency operation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a corrosion-resistant, fast-response automatic spray control valve, comprising a valve body, wherein an inlet pipe and an outlet pipe are respectively provided at the bottom and top of the side wall of the valve body, and a nozzle is installed on the outlet pipe;

[0006] The valve core is housed in a cylindrical space formed by a partition plate within the inner cavity of the valve body. An actuator mounted on the top of the valve body drives the valve core through its pull rod. A return spring is provided at the bottom of the valve core.

[0007] The annular plate at the top of the valve core contacts the inclined surface of the partition plate, and both the annular plate and the inclined surface of the partition plate are provided with strip-shaped holes. A rotatable sealing plate is installed at the bottom of the partition plate, and a manual assembly for driving the sealing plate is installed at the bottom of the valve body. Both the sealing plate and the valve body are designed with sealing assemblies to achieve the sealing function.

[0008] As a further description of the above technical solution: the valve core is a columnar structure with an opening at the bottom, and the two ends of the return spring are fixedly connected to the top wall of the valve core cavity and the bottom wall of the columnar space cavity, respectively.

[0009] As a further description of the above technical solution: the side wall and bottom wall of the partition plate are provided with several round holes, and the side wall of the valve core is provided with several rectangular holes that are adapted to the round holes.

[0010] As a further description of the above technical solution: the manual component includes a connecting rod fixedly connected to the bottom wall of the sealing plate, and a rotating disk that can rotate and cooperate with the bottom wall of the valve body is fixedly installed on the connecting rod. A drive rod provided on the rotating disk extends through to the bottom of the valve body.

[0011] As a further description of the above technical solution: the sealing assembly includes at least two first sealing rings embedded in the side wall of the valve core, and at least two second sealing rings embedded in the top wall of the sealing plate.

[0012] As a further description of the above technical solution: the valve body uses a high-nickel-based corrosion-resistant alloy as the base material, and has a fluoropolymer coating on its inner surface in contact with the fluid. The valve core uses alumina ceramic as the main body in contact with the fluid, and forms a ceramic-metal composite structure that is solidified with the metal inner core. The connecting rod and rotating disk in the manual assembly use a structure of polytetrafluoroethylene-coated stainless steel core rod.

[0013] As a further description of the above technical solution: the reset spring is a composite spring, the inner core of which is made of a high-strength stainless steel wire, and the outer surface of the inner core is covered with a fluororubber coating layer that serves as a seal and protection.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0015] 1. When the automatic actuator fails, the operator can open the manual channel through the external drive rod to carry out emergency spraying operations, avoiding production interruption or safety accidents. This design greatly improves the valve's fault tolerance and operational reliability.

[0016] 2. The valve adopts a ceramic-metal composite valve core, combined with a high-nickel-based alloy valve body and actuator, which enables the valve to not only resist extreme corrosive environments, but also achieve millisecond-level opening and closing response, ensuring the accuracy of spray control and the reliability of long-term operation. Attached Figure Description

[0017] Figure 1 A front view of the present invention is shown;

[0018] Figure 2 A cross-sectional view of the present invention is shown;

[0019] Figure 3 A perspective view of the valve core, sealing plate, and manual assembly of this utility model is shown;

[0020] Figure 4A cross-sectional view of the valve body of this utility model is shown.

[0021] Legend:

[0022] 10. Valve body; 101. Divider plate; 11. Inlet pipe; 12. Outlet pipe; 13. Nozzle; 14. Valve core; 141. Annular plate; 15. Actuator; 151. Pull rod; 16. Return spring; 17. Sealing plate; 18. Connecting rod; 19. Rotary disk; 191. Drive rod; 20. First sealing ring; 21. Second sealing ring. Detailed Implementation

[0023] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-4 This utility model provides a technical solution: a corrosion-resistant, fast-response automatic spray control valve, including a valve body 10. The lower part of the side wall of the valve body 10 is provided with an inlet pipe 11 for liquid entry, and the upper part of the side wall is provided with an outlet pipe 12 for liquid discharge. A nozzle 13 is installed at the end of the outlet pipe 12 for atomizing the outflowing liquid.

[0025] Inside the valve body 10, there is a partition plate 101 that forms a central cylindrical space, which is used to accommodate and guide the valve core 14.

[0026] An actuator 15 is mounted on the top of the valve body 10. The actuator 15 can be an electromagnetic actuator or a pneumatic actuator. It is characterized by a fast response speed. The pull rod 151 of the actuator 15 extends downward, passes through the top wall of the valve body 10, and is fixedly connected to the top of the valve core 14. It is used to drive the valve core 14 to perform axial reciprocating motion. At the bottom of the valve core 14, a return spring 16 is provided to automatically reset the valve core 14 to the closed state when the actuator 15 is not working.

[0027] Furthermore, the main body of the valve core 14 is a cylindrical hollow structure with an opening at the bottom. The return spring 16 is disposed in the inner cavity of the valve core 14, and its two ends are fixedly connected to the top wall of the inner cavity of the valve core 14 and the bottom wall of the inner cavity of the cylindrical space, respectively, and always apply a downward return force to the valve core 14.

[0028] Several round holes are formed on the side and bottom walls of the partition plate 101, serving as the main channels for liquid to flow into the valve core 14. Correspondingly, several rectangular holes are formed on the side walls of the valve core 14. When the valve core 14 is pulled upwards by the actuator 15, the bottom space of the valve core 14 communicates with its top space. Figure 2 As shown.

[0029] Furthermore, the valve core 14 is provided with an annular plate 141 at the top, and the top of the partition plate 101 is designed as an inclined surface, which contacts the annular plate 141 of the valve core 14. Corresponding strip holes are provided on the inclined surfaces of the annular plate 141 and the partition plate 101.

[0030] At the bottom of the partition plate 101, a rotatable sealing plate 17 is installed. At the bottom of the valve body 10, a manual assembly for driving the sealing plate 17 to rotate is installed. The manual assembly includes several connecting rods 18 that are fixedly connected to the bottom wall of the sealing plate 17. A rotating disk 19 that can rotate on the bottom wall of the inner cavity of the valve body 10 is fixed on the connecting rods 18. The drive rod 191 of the rotating disk 19 extends downward through the bottom of the valve body 10 for external manual operation.

[0031] The sealing plate 17 also has strip holes on its surface that correspond to the strip holes on the annular plate 141 and the partition plate 101.

[0032] Furthermore, to ensure the sealing performance of the valve, this control valve is also equipped with a sealing assembly, which includes at least two first sealing rings 20 embedded on the side wall of the valve core 14 and at least two second sealing rings 21 embedded on the top wall of the rotatable sealing plate 17. The first sealing rings 20 are used to seal the gap between the valve core 14 and the inner side wall of the cylindrical space to prevent high-pressure liquid from leaking when the valve is closed, while the second sealing rings 21 are used to ensure the seal between the sealing plate 17 and the bottom of the partition plate 101.

[0033] Furthermore, to achieve optimal corrosion resistance and structural strength, the valve body 10 preferably uses a high-nickel-based corrosion-resistant alloy (such as Hastelloy C-276 or Monel alloy) as the base material. After integral precision casting, its inner surface in contact with the fluid is further treated with a fluoropolymer coating (such as ETFE or PFA). This design combines the excellent mechanical properties and pressure resistance of the metal substrate with the excellent chemical inertness and low coefficient of friction of the fluoropolymer coating to form a dual protection system, eliminating the corrosion of the valve body 10 by the medium.

[0034] As the core moving component that withstands the scouring and precise guidance of high-speed fluid, the valve core 14 adopts an alumina ceramic-metal composite structure. Its main body, which is in contact with the fluid, is made of high-purity (>99%) alumina ceramic, which is produced by cold isostatic pressing and high-temperature sintering. It has extremely high hardness and wear resistance. Its interior is made of stainless steel (such as SUS316L) inner core through ceramic metallization and active metal brazing process to achieve a high-strength and seamless metallurgical bond. This composite structure design not only takes advantage of the wear and corrosion resistance of ceramic materials, but also utilizes the toughness and machinability of the metal inner core (for connecting the tie rod 151), thereby ensuring that the valve core 14 can still accurately maintain the micron-level fit tolerance between itself and the valve body 10 partition plate 101 after long-term operation.

[0035] The connecting rod 18 and rotating disk 19 in the manual assembly are manufactured using an integrated injection molding or compression molding process with a stainless steel core coated with polytetrafluoroethylene (PTFE). The internal stainless steel core mainly bears the function of effectively transmitting torque and axial load, while the external thick-walled PTFE coating completely isolates it from corrosive media. In addition, auxiliary components that come into contact with the media, such as valve seats, positioning bushings, and guide sleeves, are all made of reinforced polyvinylidene fluoride (PVDF) or molten perfluoroethylene propylene (FEP) engineering plastics, achieving comprehensive chemical corrosion resistance while maintaining excellent mechanical properties.

[0036] Considering that the return spring 16 needs to provide stable and reliable elastic force while being immersed in corrosive media for a long time, its inner core is made of high-strength austenitic stainless steel wire (such as 304L or 316L), which undergoes multiple cold drawing deformation strengthening and surface passivation treatments to ensure excellent elastic modulus and fatigue life. Subsequently, through a precise extrusion coating process, a layer of fluororubber (FKM) is uniformly coated on the outer layer of the stainless steel wire. This fluororubber coating completely isolates the spring core from the external corrosive media, effectively preventing stress corrosion and electrochemical corrosion, ensuring that the spring force does not decrease after long-term use, thereby ensuring the instantaneous and reliable closure of the valve.

[0037] Work steps:

[0038] Automatic rapid response working mode, this is the main working mode of this valve:

[0039] In the initial state, the actuator 15 is not powered or vented and does not generate driving force. Under the elastic force of the return spring 16, the valve core 14 is pulled to the lowest position. At this time, the upper side wall of the valve core 14 is tightly fitted with the inner side wall of the cylindrical space, and the passage is cut off. At the same time, the first sealing ring 20 set here provides a reliable seal, effectively preventing liquid from leaking upward from the water inlet pipe 11 through the holes of the partition plate 101 to the water outlet pipe 12.

[0040] When the control system issues a spray command, the actuator 15 (taking an electromagnetic actuator as an example) is instantly energized, generating a strong electromagnetic attraction. This attraction acts on the valve core 14 through the pull rod 151, overcoming the elastic force of the return spring 16 and rapidly pulling the valve core 14 upward. As the valve core 14 moves upward, the fluid passage is opened, such as... Figure 2 As shown, the liquid enters from the inlet pipe 11, flows through the round hole of the partition plate 101, enters the hollow inner cavity of the valve core 14, and then flows out at high speed from the rectangular hole on the side wall of the valve core 14. It enters the upper part of the inner cavity of the valve body 10 through the strip hole on the annular plate 141, and is finally sprayed out by the outlet pipe 12 and the nozzle 13.

[0041] After spraying is completed, the control system cuts off the power to the actuator 15, the electromagnetic force disappears instantly, and the valve core 14 returns to its original position instantly under the rapid rebound of the return spring 16, cutting off the fluid passage again. The entire opening and closing process is extremely fast and decisive, effectively avoiding leakage.

[0042] Manual emergency mode, this mode is used when actuator 15 is damaged:

[0043] When the valve needs to be opened manually, the operator rotates the drive rod 191 extending from the bottom of the valve body 10. The drive rod 191 drives the rotating disk 19, the connecting rod 18, and the sealing plate 17 to rotate synchronously. Through rotation, the strip holes on the sealing plate 17 are aligned with the inclined surface of the partition plate 101 and the strip holes on the annular plate 141 of the valve core 14. In this way, a bypass channel is opened that does not depend on the up and down movement of the valve core 14. The liquid can flow directly from the water inlet area to the water outlet area above through these aligned strip holes, thus realizing manual valve opening.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A corrosion resistant quick response automatic spray control valve comprising a valve body (10) characterized by: The valve body (10) has an inlet pipe (11) at the bottom and an outlet pipe (12) at the top of its side wall, and a nozzle (13) is installed on the outlet pipe (12). The valve core (14) is housed in a cylindrical space formed by a partition plate (101) within the inner cavity of the valve body (10). An actuator (15) installed at the top of the valve body (10) passes through the valve body (10) via its pull rod (151) and is used to drive the valve core (14). The bottom of the valve core (14) is equipped with a reset spring. Spring (16); The annular plate (141) at the top of the valve core (14) is in contact with the inclined surface of the partition plate (101), and both the annular plate (141) and the inclined surface of the partition plate (101) are provided with strip holes. A rotatable sealing plate (17) is installed at the bottom of the partition plate (101). A manual assembly for driving the sealing plate (17) is installed at the bottom of the valve body (10). Both the sealing plate (17) and the valve body (10) are designed with sealing assemblies to achieve the sealing function.

2. The corrosion resistant, fast response, automatic spray control valve of claim 1, wherein: The valve core (14) has a columnar structure with an opening at the bottom, and the two ends of the reset spring (16) are fixedly connected to the top wall of the inner cavity of the valve core (14) and the bottom wall of the inner cavity of the columnar space, respectively.

3. The corrosion resistant, fast response, automatic spray control valve of claim 1, wherein: The sidewall and bottomwall of the partition plate (101) are provided with several round holes, and the sidewall of the valve core (14) is provided with several rectangular holes that are compatible with the round holes.

4. The corrosion resistant, fast response, automatic spray control valve of claim 1, wherein: The manual assembly includes a connecting rod (18) fixedly connected to the bottom wall of the sealing plate (17). A rotating disk (19) capable of rotating with the bottom wall of the inner cavity of the valve body (10) is fixedly installed on the connecting rod (18). A drive rod (191) provided on the rotating disk (19) extends through to the bottom of the valve body (10).

5. The corrosion resistant, fast response, automatic spray control valve of claim 1, wherein: The sealing assembly includes at least two first sealing rings (20) embedded in the side wall of the valve core (14) and at least two second sealing rings (21) embedded in the top wall of the sealing plate (17).

6. The corrosion-resistant, fast-response automatic spray control valve according to claim 4, characterized in that: The valve body (10) uses a high-nickel-based corrosion-resistant alloy as the base material and has a fluoropolymer coating on its inner surface in contact with the fluid. The valve core (14) uses alumina ceramic as the main body in contact with the fluid and is a ceramic-metal composite structure that is solidified with the metal inner core. The connecting rod (18) and rotating disk (19) in the manual assembly use a structure of polytetrafluoroethylene-coated stainless steel core rod.

7. The corrosion resistant, fast response, automatic spray control valve of claim 1, wherein: The reset spring (16) is a composite spring, with a spring core made of a high-strength stainless steel wire inside, and a fluororubber coating layer covering the outside of the spring core for sealing and protection.

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