Miniature high-sensitivity multifunctional pressure control valve

Abstract

The application discloses a micro high-sensitivity multifunctional pressure control valve and relates to the technical field of spaceflight control. The micro high-sensitivity multifunctional pressure control valve comprises a shell, an inlet valve base, a secondary spring, an inlet valve, a polyimide resin gasket, a locking gasket, a high-sensitivity pressure control film, a compression ring, a threaded sleeve, a main spring, a double-cavity valve core, an adjusting flange, a safety valve end cover, a safety valve spring, a safety valve piston and a high-damping damping sealing rubber ring. The shell is divided into a high-pressure cavity, a low-pressure cavity and an adjusting cavity. The locking gasket, the high-sensitivity pressure control film, the compression ring, the threaded sleeve, the main spring, the safety valve end cover, the safety valve spring, the safety valve piston and the high-damping damping sealing rubber ring are installed in the adjusting cavity with the double-cavity valve core as a base. The secondary spring, the inlet valve and the polyimide resin gasket are installed in the low-pressure cavity with the inlet valve base as a base. The micro high-sensitivity multifunctional pressure control valve has three functions of pressure adjustment, system pressure relief and safety alarm.

Description

Technical Field

[0001] This invention relates to the field of aerospace control technology, and more specifically, to a miniature, highly sensitive, multifunctional pressure control valve suitable for a pressure regulation system in a space station equipment compartment. Background Technology

[0002] Pressure regulating valves and safety valves are two types of valve products widely used in the aerospace field, and are extensively used in space station environmental control and life support systems, satellite control and propulsion systems, and attitude control engines for solid and liquid rockets.

[0003] A pressure regulating valve is an important closed-loop regulating device for liquid / gas pressure. It can reduce the pressure of high-pressure liquid / gas upstream to the working pressure required by downstream devices. When the upstream pressure changes or the downstream load flow changes, it can still maintain the outlet pressure within the specified deviation range, thereby ensuring that the system has a certain degree of stability.

[0004] A safety valve is an important protective device for hydraulic / pneumatic systems. When unstable fluctuations or excessive pressure are detected in the system, the safety valve will automatically open to release pressure to the external environment to protect the normal operation of certain important and precision components in the system.

[0005] In normal hydraulic / pneumatic systems, pressure regulating valves often exist independently of safety valves, resulting in more internal interfaces, greater weight, larger size, and higher failure rate. Therefore, it is desirable to have a technical solution to overcome or at least mitigate one of the above-mentioned defects of the prior art. Summary of the Invention

[0006] The present invention provides a miniature, highly sensitive, multifunctional pressure control valve that can overcome the above-mentioned problems.

[0007] The technical solution adopted in this invention is as follows:

[0008] A miniature, high-sensitivity, multi-functional pressure control valve includes a control valve housing, which is provided with an input interface, an output interface, an adjustment interface, a high-pressure chamber, and a low-pressure chamber.

[0009] The high-pressure chamber includes a first port detachably connected to the intake valve base, a second port communicating with the input interface, and a third port provided with a first control component and leading to the low-pressure chamber; the first control component includes an intake valve, a secondary spring elastically pressed between the intake valve and the intake valve base, and a polyimide resin gasket connected to the intake valve and used to cut off the third port of the high-pressure chamber;

[0010] The low-pressure chamber includes a first port that matches the high-pressure chamber, a second port that communicates with the output interface, and a third port that leads to the adjustment interface;

[0011] The adjustment interface is provided with a second control component. The second upper control component includes a high-sensitivity pressure control diaphragm that seals the third port of the low-pressure chamber, a clamping ring that presses down on the edge of the high-sensitivity pressure control diaphragm, a threaded sleeve that presses down on the clamping ring and is threaded to the inner wall of the adjustment interface, and an adjustment flange that is used to limit the position of the top end of the threaded sleeve and is threaded to the outer wall of the control valve housing.

[0012] A third control component is provided inside the threaded sleeve. The third control component includes a dual-chamber valve core that is coaxially slidably fitted inside the threaded sleeve, a main spring that is elastically compressed between the bottom of the outer cavity of the dual-chamber valve core and the adjusting flange, a safety valve piston that is slidably fitted inside the inner cavity of the dual-chamber valve core, a safety valve spring located inside the safety valve piston, a safety valve end cap that is threadedly connected to the inner cavity of the dual-chamber valve core and presses against the upper end of the safety valve spring, a high-damping vibration-damping sealing rubber ring fitted to the bottom end of the safety valve piston, and a locking gasket that is threadedly connected to the lower end of the dual-chamber valve core and seals and presses the middle part of the high-sensitivity pressure control diaphragm into the dual-chamber valve core.

[0013] The dual-chamber valve core is provided with a venting channel, the lower end of which is connected to the low-pressure chamber. The safety valve piston is provided with an air passage that is open at both the top and bottom. The safety valve end cover is provided with a venting hole. The high-damping vibration-damping sealing rubber ring can cut off the air passage and the venting channel. When the air passage and the venting channel are connected, the venting channel, the air passage, and the venting hole connect the low-pressure chamber to the outside world to achieve pressure relief. During pressure relief, a high-frequency sound can be generated.

[0014] In a preferred embodiment of the present invention, the control valve housing is threadedly connected to a lock nut, which allows the adjusting flange to be completely fixed relative to the control valve housing.

[0015] In a preferred embodiment of the present invention, filters are provided at the second port of the low-pressure chamber and the second port of the high-pressure chamber.

[0016] In a preferred embodiment of the present invention, the installation interface size of the filter screen is M4, and the diameter of the first port of the high-pressure chamber is [missing information]. The diameter of the second port is

[0017] In a preferred embodiment of the present invention, the high-sensitivity pressure control film is circular with a diameter of [missing information]. The thickness is 0.5mm; the external thread specification of the threaded sleeve is M18×0.5, and the diameter of the internal cylindrical mating surface is... The height is 12mm; the main spring stiffness is 2.50N / mm, the free height is 11.5mm, and the preload is 1mm; the safety valve end cap has an external thread specification of M8×0.5 and an internal diameter of [missing information]. The height is 2.0mm; the safety valve piston and the high-damping vibration-damping sealing rubber ring are joined together by vulcanization, and the outer diameter of the safety valve piston is... Internal diameter is The safety valve spring has a stiffness of 0.6 N / mm, a free height of 10.0 mm, and a preload of 1.5 mm; the outer diameter of the dual-chamber valve core is... The diameter of the lower head probe is Inner diameter is The outer diameter of the outer cavity is The height is 18.0mm.

[0018] In a preferred embodiment of the present invention, the inner diameter of the intake valve is [missing information]. Its height is 8.0 mm, and it passes through the polyimide resin gasket by a diameter of... The mounting holes fit tightly; the stiffness of the auxiliary spring is 0.3 N / mm, the free height is 8.5 mm, and the preload is 1 mm; the intake valve base and the low-pressure chamber are connected by an M10 thread, and the intake valve base includes an inner diameter of... And the cylindrical section of the secondary spring is built in.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This invention can be applied to a certain equipment compartment of a space station to regulate the working pressure of a certain system and to provide a safety valve and alarm function when the system pressure exceeds the tolerance.

[0021] This invention is not limited by the structure, space, or layout of the space station. The pressure regulating pressure does not change with the input pressure and is an ideal constant value. The safety valve setting pressure is also a constant value.

[0022] This invention is a multi-functional pressure control valve that integrates three major functions: pressure regulation, system pressure relief, and safety alarm.

[0023] This invention is a miniature high-sensitivity valve with a total weight of ≤50g, which is 1 / 10 of the products on the market that only have pressure regulation function. Its volume is about the size of a ping-pong ball, which is 1 / 5 of the products on the market that only have pressure regulation function. Its pressure regulation accuracy is as high as ±1kpa, which is 1 / 10 of the products on the market that only have pressure regulation function.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, embodiments of the present invention are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0027] Figure 2 yes Figure 1 A three-dimensional exploded view of the structure shown.

[0028] Figure 3 yes Figure 1 The diagram shows a dual-chamber valve core.

[0029] Figure 4 yes Figure 1 The diagram shows the intake valve.

[0030] Figure 5 yes Figure 1 The diagram shows a three-dimensional structure of the safety valve end cap.

[0031] Figure 6 yes Figure 1 The diagram shows a safety valve piston.

[0032] Figure 7 yes Figure 1 The diagram shows a filter screen.

[0033] In the diagram: 1. Control valve housing; 2. Inlet valve base; 3. Secondary spring; 4. Inlet valve; 5. Polyimide resin gasket; 6. Locking gasket; 7. High-sensitivity pressure control diaphragm; 8. Pressure ring; 9. Threaded sleeve; 10. Locking nut; 11. Main spring; 12. Dual-chamber valve core; 13. Adjusting flange; 14. Safety valve end cap; 15. Safety valve spring; 16. Safety valve piston; 17. High-damping vibration-damping sealing rubber ring; 18. Filter screen; 19. Vent passage; 20. Vent hole; 21. Vent hole. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0035] Please refer to Figures 1 to 7This invention provides a miniature, high-sensitivity, multi-functional pressure control valve, the main structure of which includes a control valve housing 1, an inlet valve base 2, a secondary spring 3, an inlet valve 4, a polyimide resin gasket 5, a locking gasket 6, a high-sensitivity pressure control diaphragm 7, a pressure ring 8, a threaded sleeve 9, a locking nut 10, a main spring 11, a dual-chamber valve core 12, an adjusting flange 13, a safety valve end cap 14, a safety valve spring 15, a safety valve piston 16, a high-damping vibration-damping sealing rubber ring 17, and a filter screen 18.

[0036] The high-sensitivity pressure control diaphragm 7, made of silicon or polymer material, is used to convert externally applied pressure changes into mechanical motion for pressure control. The high-damping vibration-damping sealing rubber ring 17 is made of nitrile rubber or silicone rubber to reduce the transmission of mechanical vibrations and provide effective sealing performance.

[0037] The control valve housing 1 serves as the product mounting base, integrating the input interface S, output interface P, and regulating interface T. Internally, it is divided into a high-pressure chamber A, a low-pressure chamber B, and a regulating chamber C. The input interface S is connected to the high-pressure chamber A, the output interface P is connected to the low-pressure chamber B, and the regulating interface T is connected to the regulating chamber C.

[0038] The filter 18 is installed in the threaded flow channel between the input port S and the high-pressure chamber A.

[0039] The locking gasket 6, high-sensitivity pressure control diaphragm 7, clamping ring 8, threaded sleeve 9, main spring 11, safety valve end cap 14, safety valve spring 15, safety valve piston 16, and high-damping vibration-damping sealing rubber ring 17 are installed in the housing adjustment chamber C using the dual-chamber valve core 12 as a base. The locking gasket 6 is fixed to the dual-chamber valve core 12 by a threaded connection. The high-sensitivity pressure control diaphragm 7 is installed between the locking gasket 6 and the dual-chamber valve core 12. The sealing performance of the diaphragm is ensured by setting the threaded locking torque. The clamping ring 8 presses the edge of the high-sensitivity pressure control diaphragm 7 against the sealing end face of the housing adjustment chamber C. The threaded sleeve 9 is screwed into the housing adjustment chamber C by threads and clamps the clamping ring 8. The safety valve end cap 14, safety valve spring 15, safety valve piston 16, and high-damping vibration-damping sealing rubber ring 17 are installed in the inner cavity of the dual-chamber valve core 12 to form a safety valve module. The dual-chamber valve core 12 is fitted with the inner wall of the threaded sleeve 9, and the main spring 11 is installed in its outer cavity. The adjusting flange 13 is installed on the external thread of the control valve housing 1, which limits the initial preload of the main spring 11 and locks it by locking nut 10.

[0040] The auxiliary spring 3, the intake valve 4, and the polyimide resin washer 5 are installed in the low-pressure chamber B of the housing, with the intake valve base 2 as the base. The auxiliary spring 3 and the intake valve 4 are fitted into the internal cavity of the intake valve base 2 with a clearance fit. The polyimide resin washer 5 is bonded to the upper end of the intake valve 4 with adhesive. The intake valve base 2 is threaded into the low-pressure chamber B of the housing.

[0041] The mounting interface size of filter 18 is M4, and the diameter of the first port of the high-pressure chamber is [missing information]. The diameter of the second port is

[0042]

[0043] The high-sensitivity pressure control diaphragm 7 is circular with a diameter of [missing information]. Thickness is 0.5mm; the external thread specification of threaded sleeve 9 is M18×0.5, and the diameter of the internal cylindrical mating surface is... The height is 12mm; the main spring 11 has a stiffness of 2.50N / mm, a free height of 11.5mm, and a preload of 1mm; For example... Figure 5 As shown, the external thread specification of the safety valve end cap 14 is M8×0.5, and the internal diameter is... The height is 2.0mm; the safety valve piston 16 and the high-damping vibration-damping sealing rubber ring 17 are joined together by vulcanization, and the outer diameter of the safety valve piston 16 is... Internal diameter is The safety valve spring 15 has a stiffness of 0.6 N / mm, a free height of 10.0 mm, and a preload of 1.5 mm; the dual-chamber valve core 12, as... Figure 3 As shown, its outer diameter is The diameter of the lower head probe is Inner diameter is The outer diameter of the outer cavity is The height is 18.0mm.

[0044] like Figure 4 As shown, the inner diameter of the intake valve 4 is Its height is 8.0 mm, and it passes through the polyimide resin gasket 5 with a diameter of... The mounting holes fit tightly; the stiffness of the auxiliary spring 3 is 0.3 N / mm, the free height is 8.5 mm, and the preload is 1 mm; the intake valve base 2 and the low-pressure chamber are connected by an M10 thread, and the intake valve base 2 includes an inner diameter of... It also has a cylindrical section with a built-in secondary spring 3.

[0045] The working principle of the miniature, high-sensitivity, multi-functional pressure control valve described in this embodiment is as follows:

[0046] When not in operation, the inlet is at the working pressure, and the air inlet valve 4 is in the closed position under the action of the adjusting flange 13, the locking nut 10, the main spring 11 and the auxiliary spring 3, that is, the high pressure chamber A and the low pressure chamber B are sealed and cut off by the polyimide resin gasket 5.

[0047] In operation, high-pressure gas enters high-pressure chamber A through input interface S. The gas is throttled by the annular gap between the conical surface of inlet valve 4 and the valve seat, creating a pressure drop. The reduced-pressure gas then enters low-pressure chamber B. Within low-pressure chamber B, one path of the gas flows from output interface P to the load, while another path acts on the high-sensitivity pressure control diaphragm 7, and continues to feed upwards onto the main spring 11 and adjusting flange 13. The output pressure is adjusted by manually turning the adjusting flange 13, maintaining the valve in a dynamic equilibrium state. When the outlet pressure exceeds the rated output pressure, the force acting on inlet valve 4 increases, disrupting the force balance and causing inlet valve 4 to move upwards, reducing the throttling area and decreasing the output pressure until a new force balance is reached, maintaining a stable rated outlet pressure. Conversely, when the outlet pressure is lower than the rated output pressure, the force causes inlet valve 4 to move downwards, increasing the throttling area and increasing the output pressure. Adjusting the adjusting flange 13 changes the valve's output pressure, and tightening the locking nut 10 fixes the position of the adjusting flange 13, used for calibrating the valve's operating pressure.

[0048] When the system malfunctions, the input interface S exceeds its designed safety value. High-pressure gas pushes the safety valve piston 16 upward, causing the high-damping vibration-damping sealing rubber ring 17 to disengage from the sealing structure of the dual-chamber valve core 12. This opens the vent 20 and the vent passage 19, connecting the low-pressure chamber to the outside. The high-pressure gas flows sequentially through the vent passage 19 of the dual-chamber valve core 12, through the vent 20 of the safety valve piston 16, and after passing through the safety valve spring 15, reaches the vent 21 of the safety valve end cover 14 to achieve pressure relief. The pressure is then released to the outside of the control valve. A high-frequency whistling sound is generated during the high-speed gas flow and pressure relief, serving as an early warning function and protecting other components of the entire system.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A miniature, high-sensitivity, multi-functional pressure control valve, characterized in that, Includes a control valve housing (1), wherein the control valve housing (1) is provided with an input interface, an output interface, an adjustment interface, a high-pressure chamber and a low-pressure chamber; The high-pressure chamber includes a first port detachably connected to the intake valve base (2), a second port communicating with the input interface, and a third port provided with a first control component and leading to the low-pressure chamber; the first control component includes an intake valve (4), a secondary spring (3) elastically pressed between the intake valve (4) and the intake valve base (2), and a polyimide resin gasket (5) connected to the intake valve (4) and used to cut off the third port of the high-pressure chamber; The low-pressure chamber includes a first port that matches the high-pressure chamber, a second port that communicates with the output interface, and a third port that leads to the adjustment interface; The adjustment interface is provided with a second control component, which includes a high-sensitivity pressure control diaphragm (7) that seals the third port of the low-pressure chamber, a clamping ring (8) that presses down on the edge of the high-sensitivity pressure control diaphragm (7), a threaded sleeve (9) that presses down on the clamping ring (8) and is threaded to the inner wall of the adjustment interface, and an adjustment flange (13) that is used to limit the position of the top end of the threaded sleeve (9) and is threaded to the outer wall of the control valve housing (1). A third control component is provided inside the threaded sleeve (9). The third control component includes a double-chamber valve core (12) that is coaxially slidably fitted inside the threaded sleeve (9), a main spring (11) that is elastically compressed between the bottom of the outer cavity of the double-chamber valve core (12) and the adjusting flange (13), a safety valve piston (16) that is slidably fitted inside the inner cavity of the double-chamber valve core (12), a safety valve spring (15) located inside the safety valve piston (16), a safety valve end cap (14) that is threadedly connected to the inner cavity of the double-chamber valve core (12) and pressed against the upper end of the safety valve spring (15), a high-damping vibration-damping sealing rubber ring (17) fitted to the bottom end of the safety valve piston (16), and a locking gasket (6) that is threadedly connected to the lower end of the double-chamber valve core (12) and seals and presses the middle part of the high-sensitivity pressure control diaphragm (7) into the double-chamber valve core (12). The dual-chamber valve core (12) is provided with a venting channel (19), the lower end of which is connected to the low-pressure chamber. The safety valve piston (16) is provided with an air passage (20) that is connected from top to bottom. The safety valve end cap (14) is provided with a venting hole (21). The high-damping vibration-damping sealing rubber ring (17) can cut off the air passage (20) and the venting channel (19). When the air passage (20) and the venting channel (19) are connected, the venting channel (19), the air passage (20) and the venting hole (21) connect the low-pressure chamber to the outside world to achieve pressure relief. And when the pressure is relieved, a high-frequency sound can be generated. The high-sensitivity pressure control diaphragm (7) is circular with a diameter of Ø19.0mm and a thickness of 0.5mm; the threaded sleeve (9) has an external thread specification of M18×0.5, an internal cylindrical mating surface diameter of Ø14.0mm, and a height of 12mm; the main spring (11) has a stiffness of 2.50N / mm, a free height of 11.5mm, and a preload of 1mm; the safety valve end cap (14) has an external thread specification of M8×0.5, an internal diameter of Ø6.0mm, and a height of 2.0mm; the safety valve piston (1 6) The high-damping vibration-damping sealing rubber ring (17) is vulcanized together. The outer diameter of the safety valve piston (16) is Ø8.0mm and the inner diameter is Ø6.0mm. The stiffness of the safety valve spring (15) is 0.6N / mm, the free height is 10.0mm, and the preload is 1.5mm. The outer diameter of the double-chamber valve core (12) is Ø14.0mm, the diameter of the lower end probe rod is Ø3.5mm, the inner cavity diameter is Ø6.0mm, the outer circle diameter of the outer cavity is Ø13.0mm, and the height is 18.0mm. The inner diameter of the air intake valve (4) is Ø7.0mm and its height is 8.0mm. It is tightly fitted with the polyimide resin gasket (5) through a mounting hole with a diameter of Ø5.0mm. The stiffness of the secondary spring (3) is 0.3N / mm, its free height is 8.5mm, and its preload is 1mm. The air intake valve base (2) and the low-pressure chamber are connected by an M10 thread. The air intake valve base (2) includes a cylindrical section with an inner diameter of Ø7.0mm and the secondary spring (3) is built into it.

2. The miniature high-sensitivity multifunctional pressure control valve according to claim 1, characterized in that, The control valve housing (1) is threadedly connected to a lock nut (10), which allows the regulating flange (13) to be completely fixed relative to the control valve housing (1).

3. The miniature high-sensitivity multifunctional pressure control valve according to claim 1, characterized in that, A filter screen (18) is provided at the second port of the low-pressure chamber and the second port of the high-pressure chamber.

4. The miniature high-sensitivity multifunctional pressure control valve according to claim 3, characterized in that, The installation interface size of the filter (18) is M4, the diameter of the first port of the high-pressure chamber is Ø16.0mm, and the diameter of the second port is Ø3.0mm.

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