Pneumatic high-frequency high-speed switch ultrahigh-pressure needle valve

Abstract

The utility model discloses a pneumatic high-frequency fast switch ultrahigh pressure needle valve, which comprises a valve body and a valve cover arranged on the valve body, a split type valve seat is arranged in the valve body, a piston type actuating mechanism is arranged in the middle of the valve cover, the piston type actuating mechanism comprises a valve core which moves in a reciprocating mode, and the valve core can abut against the split type valve seat. The needle valve has the advantages of being light in structural design, high in response speed, simple in installation mode and convenient to maintain, and can provide excellent performance and reliable solutions no matter in a complex automatic system or in an emergency system needing to cut off fluid rapidly to guarantee safety.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a pneumatic high-frequency fast-switching ultra-high-pressure needle valve. Background Art

[0002] Ultra-high pressure needle valve is widely used in power stations, oil refineries, chemical plants, instrument measurement systems, hydraulic oil stations, turbine systems, mainly used for pipeline regulation and cutting. There are some problems with this type of valve during use:

[0003] 1. This type of valve on the market is generally operated manually, which is often not applicable in some dangerous and difficult to operate occasions;

[0004] 2. The slow response speed cannot achieve fast switching, and cannot meet the needs of high-frequency switching;

[0005] 3. It is difficult to network with PLC or DCS system to realize automatic control;

[0006] 4. Many similar products use an integrated design for the valve seat and valve body. Once the valve seat is worn out, it cannot be repaired and can only be scrapped, causing great waste.

[0007] For example, patent publication number CN218440702U discloses a high-pressure needle valve and a high-pressure device having the same, including: a valve body, the valve body having an air inlet channel, a valve cavity and an air outlet channel; a valve stem, the lower end of the valve stem is inserted into the valve cavity; a ejector pin, the ejector pin is arranged in the valve cavity, the upper end of the ejector pin is connected to the lower end of the valve stem, a packing pressure pad, a packing and a packing retaining ring are arranged on the outer side of the ejector pin, a packing pressure pad is arranged on the packing pressure cap, a thread is arranged on the outer side of the lower end of the packing pressure cap, and the packing pressure cap is connected to the valve body through the outer thread, a triangular protrusion is arranged on the upper end of the outer thread, and the upper end inclined surface of the triangular protrusion is exposed outside the valve body; a fixing nut, the fixing nut is arranged at the connection between the packing pressure cap and the valve body, and the fixing nut is pressed on the upper end inclined surface of the triangular protrusion.

[0008] The above scheme arranges a triangular protrusion on the outside of the packing cover of the high-pressure needle valve and limits it by a fixing nut, so that the relative fixation between the packing cover and the valve body can be ensured during the rotation of the valve stem, thereby ensuring the sealing performance of the sealing structure; however, this scheme still has the above-mentioned problems, namely, the integrated design leads to high use costs, and the response speed cannot meet the high-frequency switching requirements. Summary of the invention

[0009] In response to the problems of high cost and unsatisfactory working responsiveness of similar products in the prior art mentioned in the background technology, the utility model provides a pneumatic high-frequency fast-switching ultra-high-pressure needle valve with a lightweight structural design, rapid response speed, simple installation method and convenient maintenance performance. Whether in a complex automation system or in an emergency system that needs to quickly cut off the fluid to ensure safety, this needle valve can provide excellent performance and reliable solutions.

[0010] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0011] A pneumatic high-frequency fast-switching ultra-high-pressure needle valve comprises a valve body and a valve cover arranged on the valve body, wherein a split valve seat is arranged in the valve body, and a piston-type actuator is arranged in the middle of the valve cover, wherein the piston-type actuator comprises a reciprocating valve core, and the valve core can abut the split valve seat. The piston-type actuator directly drives the engagement or separation of the valve core and the split valve seat through its reciprocating motion to realize the opening and closing of the valve. This design can minimize the flow resistance of the fluid while providing a fast-response switching action, which is very suitable for high-pressure systems that require fast adjustment. The valve can be opened and closed quickly under high-pressure conditions, which significantly improves the accuracy and response time of controlling high-pressure fluids. In addition, the design of the split valve seat is easy to maintain and replace, which increases the service life and reliability of the equipment.

[0012] Furthermore, the piston actuator includes a driving assembly and a connecting frame arranged on the driving assembly, the connecting frame is engaged with the valve cover on one side away from the driving assembly, and an assembly nut is arranged in the connecting frame, and the assembly nut is pressed against the bottom of the connecting frame and screwed to the valve cover. The driving assembly can effectively convert the pneumatic force into the linear motion of the piston through the stable support of the piston base, thereby promoting the reciprocating motion of the valve core. The design of the connecting frame not only provides support for the driving assembly, but also ensures the stability and reliability of the actuator in high-frequency and rapid switching actions through the combination of the assembly nut and the valve cover. In addition, this structural design improves the stability and durability of the valve under high-frequency operating conditions. The combination of the assembly nut and the connecting frame effectively absorbs and mitigates the vibration and impact of the piston actuator during movement, thereby reducing the failure rate and extending the service life of the equipment.

[0013] Furthermore, a gasket is provided between the split valve seat and the valve cover, and a closing ring is provided at one end of the split valve seat close to the valve cover, the closing ring is interference-connected with the outer edge of the valve seat to form a closing groove, and the gasket is embedded in the closing groove. As a sealing element, the gasket can form an effective sealing layer between the split valve seat and the valve cover to prevent fluid leakage at the interface. The setting of the closing ring further enhances the sealing effect because it provides an additional barrier to block possible leakage paths. The use of gaskets and closing rings greatly improves the sealing performance of the valve in an ultra-high pressure environment, which is crucial to ensuring the safety of the system and reducing maintenance costs. Better sealing effect also means that the stability and reliability of the system are enhanced.

[0014] Preferably, a packing is provided between the valve core and the valve cover, and a packing gland is provided on one side of the packing close to the connection frame; the packing gland is screwed to the middle of the valve cover. The packing provides a compressible and plastic sealing medium that can conform to the deformation when the valve core moves, thereby maintaining the sealing. The packing gland ensures that the pressure and position of the packing are always maintained, which is crucial to prevent the displacement of the sealing material due to high-frequency movement. Through this sealing structure design, the sealing part of the valve can resist the challenges caused by pressure and temperature changes during high-frequency and rapid switching actions, maintain good sealing performance, and thus ensure the safety and stability of the entire system.

[0015] Preferably, the drive assembly includes a piston base, which is arranged on a side of the connecting frame away from the valve cover, and a pneumatic piston is arranged in the piston base. The pneumatic piston is the driving core of the pneumatic high-frequency and fast-switching ultra-high-pressure needle valve. When the pneumatic piston receives the air source signal, it converts the pneumatic energy into mechanical energy to push the valve core to perform rapid reciprocating motion. The piston base not only provides the necessary support for the pneumatic piston, but also ensures that the movement direction and force transmission of the pneumatic piston are correct and efficient. The pneumatic piston ensures that the valve can be switched quickly and accurately, which is particularly important for systems that require fine control of the fluid. At the same time, the setting of the piston base improves the stability and durability of the entire drive assembly, which is particularly critical during high-frequency and fast operations.

[0016] Preferably, the valve body includes two valve ports, which are respectively arranged on the upper and lower sides of the split valve seat. The provision of two valve ports increases the versatility of the valve, so that one valve can achieve multi-directional flow control. This structure can reduce the total number of valves in certain applications, simplify the design of the system, reduce potential leakage points, and improve the overall reliability of the system. The dual valve ports can not only realize complex fluid control logic, but also provide redundancy functions in specific applications. Even if one of the valve ports fails, the other valve port can still maintain the basic operation of the system, which is of great significance to the safety of critical systems.

[0017] Preferably, the valve body is an integrated structure; the two valve ports are symmetrically arranged on both sides of the valve body. The integrated structure means that the valve body is made of a single material without welded or spliced ​​parts. This design can withstand higher pressures without deformation or rupture. The symmetrical valve port layout can achieve uniform pressure distribution on the valve body, avoiding stress concentration problems caused by pressure concentration. This structure also provides higher structural integrity and safety. In ultra-high pressure applications, valves with this structure are more resistant to pressure shocks and vibrations, provide more reliable fluid control, and reduce failure rates.

[0018] Preferably, both valve ports are provided with internal threads. The internal threads provide a reliable connection method, and the valve can be directly screwed into the matching pipeline. This connection method is not only convenient, but also effectively prevents loosening or leakage under high pressure. The internally threaded valve port makes the installation and removal of the valve easier and faster, which is conducive to rapid maintenance and troubleshooting on site. At the same time, the internal thread connection has good self-sealing performance, which can avoid additional sealing materials and reduce potential leakage points.

[0019] Therefore, the utility model has the following beneficial effects:

[0020] (1): With its lightweight structure, fast response speed, simple installation and convenient maintenance, this needle valve can provide excellent performance and reliable solutions in both complex automation systems and emergency systems that need to quickly cut off the fluid to ensure safety;

[0021] (2): The combination of the assembly nut and the connection frame effectively absorbs and mitigates the vibration and impact of the piston actuator during movement, thereby reducing the failure rate and extending the service life of the equipment;

[0022] (3): Using a closed ring in combination with a gasket not only improves the sealing performance, but also simplifies the assembly process because the closed ring can serve as a guide for positioning and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model.

[0024] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0025] Valve body 1, valve cover 2, split valve seat 3, piston actuator 4, valve core 5, valve core plug 6, connecting frame 7, assembly nut 8, gasket 9, closing ring 10, packing 11, packing gland 12, piston base 13, pneumatic piston 14, valve port 15, internal thread 16. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0027] Example 1

[0028] like Figure 1 As shown, a pneumatic high-frequency fast-switching ultra-high-pressure needle valve comprises a valve body 1 and a valve cover 2 arranged on the valve body 1, wherein a split valve seat 3 is arranged in the valve body 1, and a piston-type actuator 4 is arranged in the middle of the valve cover 2, wherein the piston-type actuator 4 comprises a reciprocating valve core 5, and the valve core 5 can abut against the split valve seat 3. The piston-type actuator 4 comprises a driving assembly and a connecting frame 7 arranged on the driving assembly, wherein the connecting frame 7 engages with the valve cover 2 at a side away from the driving assembly, and an assembly nut 8 is arranged in the connecting frame 7, wherein the assembly nut 8 is pressed on the bottom of the connecting frame 7 and is screwed to the valve cover 2.

[0029] The piston actuator 4 directly drives the valve core 5 to engage or disengage with the split valve seat 3 through its reciprocating motion to realize the opening and closing of the valve. This design can minimize the flow resistance of the fluid while providing a fast-response switching action, which is very suitable for high-pressure systems that require rapid adjustment. The valve can open and close quickly under high-pressure conditions, which significantly improves the accuracy and response time of controlling high-pressure fluids. In addition, the design of the split valve seat 3 is easy to maintain and replace, which increases the service life and reliability of the equipment. In this embodiment, the piston actuator 4 is combined with the split valve seat 3, so that fast and stable switching control can be achieved even in an ultra-high-pressure environment, while also taking into account the convenience of maintenance. For example, in the process of oil production, it may be necessary to quickly cut off the fluid in the high-pressure oil well to prevent accidents. The valve can respond quickly and perform a closing action to effectively control the risk.

[0030] The driving assembly can effectively convert the pneumatic force into the linear motion of the piston through the stable support of the piston base 13, thereby promoting the reciprocating motion of the valve core 5. The design of the connecting frame 7 not only provides support for the driving assembly, but also ensures the stability and reliability of the actuator in high-frequency and rapid switching actions through the combination of the assembly nut 8 and the valve cover 2. In addition, this structure improves the stability and durability of the valve under high-frequency operating conditions. The combination of the assembly nut 8 and the connecting frame 7 allows the vibration and impact of the piston actuator 4 during the movement to be effectively absorbed and mitigated, thereby reducing the failure rate and extending the service life of the equipment. Through the ingenious design of the connecting frame 7 and the assembly nut 8, the piston actuator 4 is fixed and supported, which is particularly important in the environment of high-frequency switching operations. The valve body 1 can be used in the braking system of high-speed trains. The valve may need to be operated at high frequency to quickly adjust the braking force. At this time, the working stability of the valve body 1 is particularly critical. In this embodiment, a valve core plug 66 is provided at the end of the valve core 5. The diameter of the valve core plug is larger than the middle section of the valve core 5. The valve core plug 6 is transitionally matched with the valve cover 2. When the valve core plug 6 moves downward, it can fit the inlet of the split valve seat 3; when the valve core plug 6 moves upward, the inlet of the split valve seat 3 is exposed, and the outlet of the needle valve is switched.

[0031] like Figure 2 As shown, a gasket 9 is arranged between the split valve seat 3 and the valve cover 2, and a closed ring 10 is arranged at one end of the split valve seat 3 close to the valve cover 2. The closed ring 10 is connected with the outer edge of the valve seat by interference fit to form a closed groove, and the gasket 9 is embedded in the closed groove. As a sealing element, the gasket 9 can form an effective sealing layer between the split valve seat 3 and the valve cover 2 to prevent fluid leakage at the interface. The setting of the closed ring 10 further enhances the sealing effect because it provides an additional barrier to block possible leakage paths. The use of gaskets 9 and closed rings 10 greatly improves the sealing performance of the valve in an ultra-high pressure environment, which is crucial to ensuring the safety of the system and reducing maintenance costs. Better sealing effect also means that the stability and reliability of the system are enhanced. Using the closed ring 10 in combination with the gasket 9 not only improves the sealing performance, but also simplifies the assembly process because the closed ring 10 can be used as a guide for positioning and installation.

[0032] A packing 11 is arranged between the valve core and the valve cover 2, and a packing gland 12 is pressed and arranged on the side of the packing 11 close to the connection frame 7; the packing gland 12 is screwed to the middle of the valve cover 2. The driving assembly includes a piston base 13, which is arranged on the side of the connection frame 7 away from the valve cover 2, and a pneumatic piston 14 is arranged in the piston base 13.

[0033] The packing provides a compressible and plastic sealing medium that can conform to the deformation when the valve core moves, thereby maintaining the seal. The packing gland ensures that the pressure and position of the packing are always maintained, which is essential to prevent the displacement of the sealing material caused by high-frequency movement. Through this sealing structure design, the sealing part of the valve can resist the challenges caused by pressure and temperature changes during high-frequency and rapid switching actions, maintain good sealing performance, and ensure the safety and stability of the entire system. The wear, displacement and pressure changes that may occur in the packing during high-frequency and rapid movements on the sealing are taken into account. Through the constant pressure of the packing gland, the packing can maintain its sealing function during the dynamic movement of the valve core, and will not leak even in an ultra-high pressure environment. In the hydraulic system of high-speed cutting equipment, the valve needs to respond quickly to pressure changes to control the precise movement of the cutting head. At this time, the design of the packing and packing gland can ensure that the system can still maintain excellent sealing effect after long-term high-frequency operation.

[0034] The pneumatic piston 14 is the driving core of the pneumatic high-frequency fast-switching ultra-high-pressure needle valve. When the pneumatic piston 14 receives the air source signal, it converts the pneumatic energy into mechanical energy and drives the valve core to perform rapid reciprocating motion. The piston base 13 not only provides the necessary support for the pneumatic piston 14, but also ensures that the movement direction and force transmission of the pneumatic piston 14 are correct and efficient. The pneumatic piston 14 ensures that the valve can be switched quickly and accurately, which is particularly important for systems that require fine control of the fluid. At the same time, the setting of the piston base 13 improves the stability and durability of the entire drive assembly, which is particularly critical during high-frequency and fast operations. The combination of the piston base 13 and the pneumatic piston 14 not only improves the response speed, but also ensures durability and maintainability in frequent operations. In this embodiment, in the automated control system, for occasions with extremely high control accuracy requirements, such as chemical vapor deposition reactors in semiconductor manufacturing equipment, this high-precision and fast-response pneumatic piston 14 design can provide extremely precise fluid control capabilities.

[0035] The valve body 1 includes two valve ports 15, which are respectively arranged on the upper and lower sides of the split valve seat 3. The valve body 1 is an integrated structure; the two valve ports 15 are symmetrically arranged on both sides of the valve body 1. The arrangement of the two valve ports 15 increases the versatility of the valve, so that one valve can achieve multi-directional flow control. This structure can reduce the total number of valves in certain applications, simplify the design of the system, reduce potential leakage points, and improve the overall reliability of the system. The dual valve ports 15 can not only realize complex fluid control logic, but also provide redundancy functions in specific applications. Even if one of the valve ports 15 fails, the other valve port 15 can still maintain the basic operation of the system, which is of great significance to the safety of critical systems. The valve can support more complex fluid control requirements, such as bidirectional flow or simultaneous input and output control. This design allows more flexible installation and pipeline connection, while maintaining fast response and high sealing performance, while increasing the flexibility and robustness of system design.

[0036] The one-piece structure means that the valve body 1 is made of a single material without welded or spliced ​​parts. This design can withstand higher pressures without deformation or rupture. The symmetrical layout of the valve port 15 can achieve uniform pressure distribution on the valve body 1, avoiding the problem of stress concentration caused by pressure concentration. The structure also provides higher structural integrity and safety. In ultra-high pressure applications, valves with this structure are more resistant to pressure shocks and vibrations, provide more reliable fluid control, and reduce failure rates. In this embodiment, in view of the special requirements of the ultra-high pressure environment, an one-piece structure is selected and the valve port 15 is symmetrically arranged. This design not only improves the safety and reliability of the valve, but also simplifies the manufacturing process because the one-piece structure is easier to process and inspect.

[0037] Both valve ports 15 are provided with internal threads 16. The internal threads 16 provide a reliable connection method, which allows the valve to be screwed directly into the matching pipeline. This connection method is not only convenient, but also effectively prevents loosening or leakage under high pressure. The valve port 15 with internal threads 16 makes the installation and removal of the valve easier and faster, which is conducive to rapid maintenance and troubleshooting on site. At the same time, the internal thread 16 connection has a good self-sealing performance, which can avoid additional sealing materials and reduce potential leakage points. For ultra-high pressure applications, the connection stability of the valve is very important. The internal thread 16 can ensure the sealing and pressure resistance of the connection without adding additional sealing elements. In high-precision test equipment, when the system is frequently replaced or reconfigured, the design of the internal thread 16 can significantly reduce the workload of the staff and reduce the operational risks caused by improper installation, thereby improving the operating efficiency and safety factor of the entire system. The connection between the valve and the pipeline is simplified, and the installation time and potential assembly errors are reduced. The internal thread 16 connection also makes the valve easier to adapt to different pipeline systems, increasing its scope of application and competitiveness in the market. In high pressure applications, it is critical to maintain tightness while withstanding pressure. The use of internal thread 16 solves this problem.

[0038] In this embodiment, the needle valve adopts a valve body 1 made of integral forging technology, which has an extremely high design pressure standard and can withstand a working pressure of up to 10000PSI (about 69MPa), ensuring strength and durability under harsh working conditions. In order to meet the needs of industrial automation, the valve is combined with a piston actuator 4, which can achieve fast switching action within 0.2 seconds to meet high-frequency control requirements. The power source of the actuator is compressed air. This clean power source can be used in conjunction with air path control elements such as solenoid valves or valve positioners to achieve precise automatic program control. The split design of the valve seat is not only convenient for maintenance and replacement, but also can be quickly disassembled and assembled through threaded connection, greatly reducing maintenance time and improving production efficiency. In addition, the overall compact size and light weight make the needle valve easily installed in various pipeline systems, and its threaded connection method further simplifies the installation process, and the application of ferrule joints makes the connection with the pipeline quick and reliable.

[0039] In actual operation, the pneumatic high-frequency fast-switching ultra-high-pressure needle valve exhibits particularly outstanding performance. When opening the valve, the system control signal instructs the solenoid valve or positioner to supply compressed air to the piston actuator 4, and the pneumatic piston 14 is pushed away from the split valve seat 3 by the pressure to achieve rapid fluid circulation. The entire opening action is rapid and accurate, and can be completed in a very short time to meet high-frequency operation requirements. On the contrary, when the valve needs to be closed, the control system will immediately cut off the compressed air supply to the pneumatic piston 14, and the piston that loses power will quickly return to its position under the action of the built-in spring, so that the valve core fits tightly against the split valve seat 3 to achieve a rapid sealing and closing state. This closing process can also be completed within 0.2 seconds, which is crucial for occasions where high-pressure fluid needs to be quickly cut off to prevent safety accidents. This high-frequency and fast operation capability, combined with the robustness and sealing of the valve structure, enables the needle valve to play a key role in both automated control systems and emergency safety systems, ensuring the accuracy of fluid control and the safety and reliability of the system.

Claims

1. A pneumatic high-frequency fast-switching ultra-high-pressure needle valve, It is characterized in that It comprises a valve body and a valve cover arranged on the valve body, wherein a split valve seat is arranged in the valve body, a piston-type actuator is arranged in the middle of the valve cover, and the piston-type actuator comprises a reciprocating valve core, and the valve core can abut against the split valve seat.

2. A pneumatic high-frequency fast-switching ultra-high-pressure needle valve according to claim 1, It is characterized in that The piston actuator includes a driving assembly and a connecting frame arranged on the driving assembly. The connecting frame engages with the valve cover at one side away from the driving assembly. An assembly nut is arranged in the connecting frame. The assembly nut is pressed on the bottom of the connecting frame and is screwed to the valve cover.

3. A pneumatic high-frequency fast-switching ultra-high-pressure needle valve according to claim 1, It is characterized in that A gasket is arranged between the split valve seat and the valve cover, and a closed ring is arranged at one end of the split valve seat close to the valve cover. The closed ring is interference-connected with the outer edge of the valve seat to form a closed groove, and the gasket is embedded in the closed groove.

4. A pneumatic high-frequency fast-switching ultra-high-pressure needle valve according to claim 3, It is characterized in that A packing is arranged between the valve core and the valve cover, and a packing gland is pressed and arranged on one side of the packing close to the connection frame; the packing gland is screwed to the middle part of the valve cover.

5. A pneumatic high-frequency fast-switching ultra-high-pressure needle valve according to claim 2, It is characterized in that The driving assembly comprises a piston base, which is arranged on a side of the connecting frame away from the valve cover, and a pneumatic piston is arranged in the piston base.

6. A pneumatic high-frequency fast-switching ultra-high-pressure needle valve according to any one of claims 1 to 5, It is characterized in that The valve body comprises two valve ports, and the two valve ports are respectively arranged at the upper and lower sides of the split valve seat.

7. A pneumatic high-frequency fast-switching ultra-high-pressure needle valve according to claim 6, It is characterized in that The valve body is an integrated structure; the two valve ports are symmetrically arranged on both sides of the valve body.

8. A pneumatic high-frequency fast-switching ultra-high-pressure needle valve according to claim 6, It is characterized in that The two valve ports are both provided with internal threads.

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