CN112747156B - High-precision large-pressure-reduction-ratio automatic pressure-regulating gas pressure-stabilizing pressure-reducing combined valve - Google Patents

High-precision large-pressure-reduction-ratio automatic pressure-regulating gas pressure-stabilizing pressure-reducing combined valve Download PDF

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Publication number
CN112747156B
CN112747156B CN202110037425.XA CN202110037425A CN112747156B CN 112747156 B CN112747156 B CN 112747156B CN 202110037425 A CN202110037425 A CN 202110037425A CN 112747156 B CN112747156 B CN 112747156B
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pressure
valve
primary
stage
base body
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CN112747156A (en
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赵健
谢文
何通
刘建峰
刘畅
李磊磊
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Beijing Satellite Manufacturing Factory Co Ltd
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Beijing Satellite Manufacturing Factory Co Ltd
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Priority to PCT/CN2021/129481 priority patent/WO2022151818A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/44—Details of seats or valve members of double-seat valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/48—Attaching valve members to screw-spindles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
    • F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Fluid Pressure (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

The invention relates to a high-precision large-pressure-reduction-ratio automatic pressure-regulating gas pressure-stabilizing and pressure-reducing combined valve which adopts a two-stage pressure-reducing structure to realize high-precision output of pressure. The first stage adopts a mechanical pressure reducing valve, and the second stage adopts an electric proportional pressure reducing valve. The primary pressure reducing valve adopts a main body structure of a reverse unloading type, air pressure acting on the valve under the action of inlet pressure is balanced, so that the influence of air source pressure fluctuation is reduced, and the primary pressure reducing valve adopts a metal diaphragm type structure to improve the pressure resistance aiming at the problem of high upstream pressure. The two-stage pressure reducing valve adopts a main body form of an electromagnetic proportional valve, the valve body adopts a reverse unloading type structure, the interference of inlet pressure is further reduced, and meanwhile, the stability of output pressure is ensured on the premise of ensuring flow by adopting a driving element of a proportional electromagnet.

Description

High-precision large-pressure-reduction-ratio automatic pressure-regulating gas pressure-stabilizing pressure-reducing combined valve
Technical Field
The invention belongs to the field of industrial valve design, and relates to a high-precision large-pressure-reduction-ratio automatic pressure-regulating gas pressure-stabilizing pressure-reducing combined valve.
Background
At present, a fuel cell gas supply system mostly adopts two modes of a pressure regulating valve and a pneumatic pressure regulating mode, wherein the mechanical pressure regulating mode needs manual regulation by an operator when pressure changes in the using process or adopts a preset regulation mode, but the mode has poor interference resistance on upstream and downstream. Pneumatic pressure regulation often needs extra auxiliary air supply to carry out pressure control, and the system is complicated, and is with high costs, simultaneously because increased extra auxiliary air supply system and controlled, leads to its response speed of pressure to reduce certainly, and the reliability of system also reduces by a wide margin.
Disclosure of Invention
The technical problem solved by the invention is as follows: the defects of the prior art are overcome, and the high-precision large-pressure-reduction-ratio automatic pressure-regulating gas pressure-stabilizing pressure-reducing combined valve is provided.
The technical scheme of the invention is as follows:
a high-precision large-pressure-reduction-ratio automatic-pressure-regulation gas pressure-stabilizing and pressure-reducing combined valve comprises a primary pressure-reducing valve and a secondary pressure-reducing valve, wherein the primary pressure-reducing valve comprises an adjusting rod, a primary valve upper cover, a spring upper top plate, a main spring, a spring lower top plate, a primary ejector rod, a metal diaphragm assembly, a primary valve spring, a primary lower mounting seat and a primary metal sealing gasket; the second-stage pressure reducing valve comprises a proportional electromagnet, a corrugated pipe assembly, a second-stage ejector rod, a second-stage guide damping block, a switching support, a second-stage valve assembly, a second-stage valve spring, a base body, a second-stage metal sealing gasket, a second-stage lower mounting seat and a first-stage damping pore plate;
the first-stage pressure reducing valve is arranged on the right side of the base body, and the second-stage pressure reducing valve is arranged on the left side of the base body
Specifically, the first-stage valve assembly is in a reverse unloading structure form, a cylindrical step cavity is axially formed in the first-stage valve assembly, the upper cylindrical diameter is smaller than the lower cylindrical diameter, a first-stage valve spring is installed in the lower cylindrical cavity, a boss is designed at the top of the first-stage valve assembly, two inclined holes are formed in the boss, and the two inclined holes penetrate through the axial cylindrical step cavity; a sealing groove is formed in the outer surface of the first-stage valve assembly, and a sealing ring and a sealing baffle are mounted on the sealing groove;
a blind hole is formed in the first-stage lower mounting seat, and the first-stage valve assembly is mounted in the blind hole; the primary lower mounting seat is arranged on the base body, and a primary metal sealing gasket is arranged between the primary lower mounting seat and the base body;
the first-stage damping pore plate is arranged on the upper end stop hole on the right side of the base body through a screw, the first-stage damping pore plate and the base body are in clearance fit, and after the first-stage damping pore plate is arranged in place, the first-stage damping pore plate is just contacted with the upper end face of the first-stage valve assembly;
the primary ejector rod is inserted into the guide hole of the primary damping pore plate, and the metal diaphragm assembly is arranged in the positioning groove on the right side of the base body and is positioned above the primary damping pore plate;
the lower spring top plate is arranged on the metal diaphragm assembly, the main spring is arranged on the upper side of the upper spring top plate, the upper spring top plate is arranged on the upper side of the main spring, the upper primary valve cover is arranged on the upper part of the right side of the base body through a screw, the metal diaphragm assembly is positioned between the upper primary valve cover and the base body, and the lower spring top plate, the main spring and the upper spring top plate are all positioned inside the upper primary valve cover;
the adjusting rod is connected with the upper cover of the primary valve through threads, and a bulge at the lower end of the adjusting rod is contacted with the upper top plate of the spring;
the secondary valve component is in a reverse unloading structure form, a cylindrical step cavity is axially formed in the secondary valve component, the diameter of an upper cylinder is smaller than that of a lower cylinder, a secondary valve spring is installed in the lower cylinder cavity, a sealing groove is formed in the outer surface of the secondary valve component, and a sealing ring and a sealing baffle are installed on the sealing groove; a V-shaped hole is processed at the top end of the secondary valve component;
a blind hole is formed in the second-stage lower mounting seat, and the second-stage valve assembly is mounted in the blind hole; the second-level lower mounting seat is arranged on the base body, and a second-level metal sealing gasket is arranged between the second-level lower mounting seat and the base body;
the secondary guide damping block is arranged in an upper end stop hole on the left side of the base body through a screw, and the guide length in the secondary guide damping block is 5-10 times of the diameter of the inner hole of the guide hole;
the secondary ejector rod is arranged in a guide hole of the secondary guide damping block; the lower side of the secondary ejector rod is conical in shape, a blind hole with the diameter r1 is formed in the lower side of the secondary ejector rod, a blind hole with the diameter r2 is formed in one side of the top end of the blind hole, and the blind hole with the diameter r2 is penetrated through the blind hole with the diameter r 1; the conical shape below the secondary ejector rod is contacted with the V-shaped hole at the top end of the secondary valve component;
the corrugated pipe assembly comprises a corrugated pipe, a lower supporting surface and an upper fixing surface, wherein the corrugated pipe is positioned in the middle and is connected with the lower supporting surface and the upper fixing surface in a welding mode; a guide hole is processed on the upper fixing surface;
the corrugated pipe assembly is arranged on the base body and is positioned above the secondary guide damping block; after the installation is in place, the top end of the secondary ejector rod is inserted into a guide hole of the upper fixing surface of the corrugated pipe assembly;
the adapter bracket is arranged above the left side of the base body, and the proportional electromagnet is positioned above the corrugated pipe assembly and fixed on the base body;
a high-pressure cavity is processed among the right inlet of the base body, the primary valve port and the primary or door assembly sealing groove; a medium pressure cavity is processed among the first-stage valve port, the metal diaphragm component and the second-stage valve port; and a low-pressure cavity is processed between the right outlet of the base body, the secondary valve port and the secondary or door assembly.
The first-stage valve assembly adopts a vulcanized rubber form to vulcanize fluororubber on the metal framework, the upper cylindrical diameter of the inner axial cylindrical step cavity is 0.8-1.1 mm, and the aperture of two inclined holes at the boss is 0.5-0.8 mm.
Polytetrafluoroethylene is gathered in the spraying of mount pad blind hole inner wall under the one-level, and polytetrafluoroethylene thickness 20 ~ 30um, and the cooperation between mount pad blind hole and the one-level valve subassembly adopts little clearance fit under the one-level after the spraying, and clearance control is between 4um to 8 um.
A knife edge sealing ring is arranged in the middle of an annular area where the first-stage lower mounting seat is in contact with the first-stage metal sealing gasket, the height of the knife edge sealing ring is 0.15mm, and the knife edge angle is 60 degrees;
the middle of the annular area where the base body is contacted with the first-level metal sealing gasket is provided with a V-shaped sealing waterline, the depth of the sealing waterline is 0.2, and the angle of a V-shaped angle is 60 degrees.
The metal diaphragm assembly adopts a beryllium bronze metal diaphragm, the beryllium bronze diaphragm adopts a sine wave embossing form, red copper sealing gaskets with the thickness of 0.9mm are respectively welded on the upper surface and the lower surface of the beryllium bronze metal diaphragm, and the sealing property between the red copper sealing gaskets and the beryllium bronze metal diaphragm is superior to 1x10 -9 Pam 3 /s。
When the metal membrane component is arranged in the positioning groove on the right side of the base body, the sine wave boss direction of the metal membrane component is downwards arranged;
on the surface of the metal membrane component contacted with the substrate, 2 knife edge sealing rings are processed on the substrate, the height of the knife edge sealing ring is 0.15mm, and the knife edge angle is 60 degrees.
2 knife edge sealing rings are processed on the ring surface of the upper cover of the primary valve, which is contacted with the metal diaphragm component, the height of the knife edge sealing ring is 0.15mm, and the knife edge angle is 60 degrees.
The second-stage valve component adopts a vulcanized rubber form to vulcanize fluororubber on the metal framework, and the upper cylindrical diameter of the inner axial cylindrical step cavity is 0.8-1.1 mm.
Polytetrafluoroethylene is sprayed on the inner wall of the blind hole of the mounting seat under the second stage, the thickness of the polytetrafluoroethylene is 20-30 um, the matching between the blind hole of the mounting seat and the second-stage valve component adopts small clearance fit under the second stage after spraying, and the clearance is controlled between 4um and 8 um.
A secondary metal sealing gasket is arranged between the secondary lower mounting seat and the substrate, a knife edge sealing ring is arranged in the middle of an annular area where the secondary lower mounting seat is contacted with the secondary metal sealing gasket, the height of the knife edge sealing ring is 0.15mm, and the knife edge angle is 60;
the middle of the annular area where the base body is contacted with the secondary metal sealing gasket is provided with a V-shaped sealing waterline, the depth of the sealing waterline is 0.2, and the angle of the V-shaped angle is 60 degrees.
Compared with the prior art, the invention has the beneficial effects that:
the gas pressure stabilizing and reducing combined valve adopts a two-stage pressure reducing structure, and realizes high-precision output of pressure. The first stage adopts a mechanical pressure reducing valve, and the second stage adopts an electric proportional pressure reducing valve.
Aiming at the problem of large upstream pressure change, the primary pressure reducing valve adopts a reverse unloading type main body structure to balance the air pressure acting on the piston assembly under the action of the inlet pressure, so that the influence of air source pressure fluctuation is reduced, and aiming at the problem of high upstream pressure, the primary pressure reducing valve adopts a metal diaphragm type structure to improve the pressure resistance.
Aiming at the problems of adjustable downstream pressure and high precision, the secondary pressure reducing valve adopts the main body form of an electromagnetic proportional valve, the valve body adopts a reverse unloading structure, the interference of inlet pressure is further reduced, and meanwhile, the driving element of a proportional electromagnet is adopted, so that the stability of output pressure is ensured on the premise of ensuring the flow. Aiming at the problem of high output precision, a pressure closed-loop control method is mainly adopted, outlet pressure is collected through a pressure sensor, the output force value of the proportional electromagnet is adjusted, and the stability and the output precision of the output pressure are ensured.
The system is simple, the cost is low, the response speed of the pressure is high, and the reliability of the system is effectively improved.
Drawings
FIG. 1 is a schematic view of a gas pressure-stabilizing and pressure-reducing combination valve according to the present invention;
FIG. 2 is a schematic view of a PTFE lubricant sprayed on the surface of a sealing pair of a OR gate assembly;
FIG. 3 is a schematic view of a metal diaphragm assembly;
fig. 4 is a schematic view of a bellows assembly.
Detailed Description
The invention is further elucidated with reference to the drawing.
The valve set is composed as shown in figure 1, an integrated design is adopted, and all parts are arranged on a base body to form the valve set with high integration level.
The first-stage valve assembly 8 is in a vulcanized rubber form, fluororubber is vulcanized on the metal framework, the first-stage valve assembly 8 is in a reverse unloading structure form, a cylindrical step cavity is machined inside the first-stage valve assembly, the diameter of the upper-end cylindrical cavity is smaller than that of the lower-end cylindrical cavity, the diameter of the upper-end cylindrical cavity is 0.8-1.1 mm, two inclined holes are formed in a boss at the top of the first-stage valve assembly, the diameter of each inclined hole is 0.5-0.8 mm, and the two inclined holes are penetrated through the cylindrical step cavity in the axial direction.
The outer surface of the first-stage valve assembly 8 is provided with a sealing groove, a sealing ring and a sealing baffle are arranged on the sealing groove, the sealing ring is made of fluororubber, and the sealing baffle is made of polytetrafluoroethylene. The diameter of the sealing ring is 1.8 mm, and the depth of the sealing groove is 1.5 mm-1.55 mm.
Mount pad 10 is metal parts under the one-level, inside processing has the blind hole, in order to reduce the frictional force of O type sealing washer of installation on mount pad 10 and the one-level valve subassembly 8 under the one-level in the motion process, mount pad 10 blind hole internal surface spraying polytetrafluoroethylene under the one-level, polytetrafluoroethylene thickness 20 ~ 30um, the cooperation that requires between mount pad 10 blind hole and the one-level valve subassembly 8 under the one-level after the spraying adopts little clearance fit, clearance control is between 4um to 8 um.
The first-stage valve assembly 8 is arranged in a blind hole in the first-stage lower mounting seat 10, a first-stage valve spring 9 is arranged between the first-stage valve assembly and the blind hole, and the first-stage valve spring 9 is positioned in a lower cylindrical cavity of the first-stage or door assembly cylindrical stepped cavity. The first-level lower mounting seat 10 is mounted on the base body 19, the first-level metal sealing gasket 11 is mounted between the first-level lower mounting seat 10 and the base body 19, and the first-level metal sealing gasket 11 is made of red copper and is 1mm thick. A knife edge sealing ring is arranged in the middle of an annular contact area of the first-level lower mounting seat 10 and the first-level metal sealing gasket 11, the height of the knife edge sealing ring is 0.15mm, the knife edge angle is 60 degrees, a V-shaped sealing waterline is arranged in the middle of an annular contact area of the substrate 19 and the first-level metal sealing gasket 11, the depth of the sealing waterline is 0.2, the V-shaped angle is 60 degrees, and the first-level lower mounting seat 10 is connected with the substrate 19 through 6M 5 screws.
The primary damping orifice plate 22 is mounted on the upper end stop hole on the right side of the base body 19, the primary damping orifice plate 22 and the base body 19 are in clearance fit, and 3M 3 countersunk head screws are adopted to fix the primary damping orifice plate 22 and the base body 19 together. The first-stage damping orifice plate 22 is required to be just contacted with the upper end surface of the first-stage valve assembly 8 after being installed, and the rubber indentation depth of the first-stage valve assembly 8 is ensured to be controlled between 0.2 mm and 0.3 mm.
The first-stage ejector rod 6 is inserted into a guide hole of the first-stage damping orifice plate 22, and the first-stage ejector rod and the guide hole are in small clearance fit.
The metal diaphragm component 7 adopts a beryllium bronze metal diaphragm, the thickness of the diaphragm is 0.18mm, the beryllium bronze diaphragm adopts a sine wave embossing form to enhance the rigidity of the diaphragm, and red copper sealing gaskets with the thickness of 0.9mm are respectively welded on the upper surface and the lower surface of the beryllium bronze diaphragm in a welding mode, so that the sealing property between the metal diaphragm component and the copper sealing gaskets is required to be better than 1x10 -9 Pam 3 And s. As shown in fig. 3.
The metal diaphragm assembly 7 is arranged in a positioning groove at the right side of the base body 19, small clearance fit is adopted between the metal diaphragm assembly 7 and the base body 19, 2 knife edge sealing pairs are machined on the base body 19 on the surface of the metal diaphragm assembly 7, the height of each knife edge sealing ring is 0.15mm, the knife edge angle is 60 degrees, and the metal diaphragm sine wave boss is installed downwards.
The sprung lower top plate 5 is mounted on a metal diaphragm assembly 7.
The main spring 4 is installed on the upper side of the spring upper top plate 3.
The spring top plate 3 is mounted on the upper side of the main spring 4.
The primary valve upper cover 2 is arranged on the upper side of the base body 19 and is connected through 6M 5 screws, and the metal diaphragm assembly 7 is arranged between the primary valve upper cover 2 and the base body 19. The adjusting rod 1 is connected with the upper cover 2 of the primary valve through threads, and a bulge at the lower end of the adjusting rod 1 is in contact with the upper top plate 3 of the spring. The lower spring top plate 5, the main spring 4, and the upper spring top plate 3 are located inside the primary valve upper cover 2.
Similarly, 2 knife edge sealing rings are processed on the ring surface of the primary valve upper cover 2 contacted with the metal diaphragm component 7, the height of the knife edge sealing ring is 0.15mm, and the knife edge angle is 60 degrees.
The secondary valve assembly 17 adopts a vulcanized rubber form to vulcanize fluororubber on the metal framework, the secondary valve assembly 17 adopts a reverse unloading structure form, a cylindrical stepped cavity is processed inside, the diameter of the upper cylindrical cavity is smaller than that of the lower cylindrical cavity, and the diameter of the upper cylindrical cavity is 0.8-1.1 mm. The top of the secondary valve assembly 17 is machined with a V-shaped hole.
The outer surface of the secondary valve assembly 17 is provided with a sealing groove, a sealing ring is arranged on the sealing groove, and the sealing ring is made of fluororubber. The diameter of the sealing ring is 1.8 mm, and the depth of the sealing groove is 1.5 mm-1.55 mm.
Mount pad 21 is metal parts under the second grade, in order to reduce the frictional force of O type sealing washer of installation on mount pad 21 and the second grade valve subassembly 17 in the motion process under the second grade, it has the blind hole to process on mount pad 21 under the second grade, the interior surface coating of blind hole polytetrafluoroethylene, polytetrafluoroethylene thickness 20 ~ 30um, the cooperation between mount pad 21 blind hole and the second grade valve subassembly 17 adopts little clearance fit under the second grade after the requirement spraying, clearance control is between 4um to 8 um.
The secondary valve assembly 17 is mounted in a blind hole in the secondary lower mounting seat 21, a secondary valve spring 18 is mounted between the two, and the secondary valve spring 18 is located in a lower cylindrical cavity of the cylindrical stepped cavity of the secondary valve assembly 17. The secondary valve assembly 17 is arranged on the base body 19, the secondary valve assembly 17 and the base body 19 are provided with a secondary metal sealing gasket 20, and the secondary metal sealing gasket 20 is made of red copper and is 1mm thick. A knife edge sealing ring is arranged in the middle of an annular contact area of the second-stage valve assembly 17 and the second-stage metal sealing gasket 20, the height of the knife edge sealing ring is 0.15mm, the knife edge angle is 60 degrees, a V-shaped sealing waterline is arranged in the middle of an annular contact area of the substrate 19 and the second-stage metal sealing gasket 20, the depth of the sealing waterline is 0.2, the angle of the V-shaped sealing waterline is 60 degrees, and the second-stage lower mounting seat 17 is connected with the substrate 19 through 6M 5 screws.
The secondary guide damping block 15 is arranged in an upper end stop hole on the left side of the base body 19, the two are in clearance fit, and the guide length in the secondary guide damping block 15 is 5-10 times of the diameter of the inner hole of the guide hole.
The secondary ejector rod 14 is installed in a guide hole in the secondary guide damping block 15. The lower side of the secondary ejector rod 14 is provided with a blind hole with the diameter of 0.8mm, the lower side of the secondary ejector rod is conical, the hole depth is 10mm, and the blind hole with the diameter of 0.8mm on one side and the blind hole with the diameter of 0.8mm in the axial direction penetrate through the blind hole with the diameter of 10 mm. The conical shape below the secondary ejector rod 14 is contacted with a V-shaped hole of the secondary valve component 17.
The wall thickness of a middle corrugated pipe of the corrugated pipe assembly 13 is 0.12mm, the rigidity is 2N/mm, the corrugated pipe, the lower supporting surface and the upper fixing surface are welded together in a welding mode, the welding mode is laser welding, and the welding sealing leakage rate is guaranteed to be better than 1x10 -9 Pam 3 /s.。
The bellows assembly 13 is connected to the base 19 to ensure that the guide hole of the upper fixing surface of the bellows assembly 13 is matched with the secondary ram 14. A sealing structure is provided between the bellows assembly 13 and the base 19.
An adapter bracket 16 is mounted on the upper left side of the base 19 for connecting the proportional electromagnet 12 to the base 19. The three are fixed by 4M 5 screws.
As shown in FIG. 1, a high-pressure cavity is processed between the right inlet of the base body, the primary valve port and the sealing groove of the primary or door assembly; a medium pressure cavity is processed among the first-stage valve port, the metal diaphragm component 7 and the second-stage valve port; and a low-pressure cavity is processed between the right outlet of the base body, the secondary valve port and the secondary or door assembly.
The working principle of the invention is as follows:
first-stage valve internal flow path:
the gas enters the high-pressure cavity and enters the gas outlet of the first-stage pressure reducing valve through the substrate passage, wherein the gas outlet of the first-stage pressure reducing valve is communicated with the medium-pressure cavity, and simultaneously, the outlet pressure is led to the lower cavity of the first-stage valve assembly for balancing the pressure difference between the upper side and the lower side of the first-stage valve assembly. When the pressure on the outlet side is increased, the metal diaphragm assembly 7 is pressed to move upwards, so that the main spring 4 is compressed to move upwards, the first-stage valve assembly pushes the first-stage ejector rod to move upwards under the action of the first-stage valve spring 9, the opening amount of the valve is reduced, the flow rate is increased, the pressure is reduced, and the pressure behind the valve is reduced; when the pressure of the outlet side is reduced, the metal diaphragm assembly 7 moves downwards under the pushing of the main spring 4, the first-stage ejector rod is pushed to compress the first-stage valve assembly to move downwards, the opening amount of the valve is increased, the flow rate is reduced, the pressure drop is reduced, the pressure behind the valve is increased, and therefore the outlet pressure behind the valve is guaranteed to be kept relatively stable and small in pressure fluctuation all the time.
Two-stage valve internal flow path:
and the pressure difference between the upper side and the lower side of the second-stage valve component is balanced by leading the outlet pressure to the lower end part of the second-stage valve component. Reducing outlet pressure fluctuations caused by upstream pressure variations. When the pressure on the outlet side is increased, the corrugated pipe assembly is pressed to move upwards, the compression ratio electromagnet main shaft moves upwards, and the secondary valve assembly pushes the secondary ejector rod to move upwards under the action of the secondary valve spring, so that the opening of a valve port is reduced, the flow rate is increased, the pressure is reduced, and the pressure behind the valve is reduced; when the pressure of the outlet side is reduced, the corrugated pipe assembly moves downwards under the pushing of the main shaft of the proportional electromagnet, the ejector pin of the valve is pushed to compress the valve to move downwards, the opening of the valve port is increased, the flow rate is reduced, the pressure drop is reduced, the pressure behind the valve is increased, and therefore the outlet pressure behind the valve is guaranteed to be kept relatively stable and small in pressure fluctuation all the time.
The electric regulation of the outlet pressure is controlled by the output force of the proportional electromagnet, and the change of the output force of the proportional electromagnet is realized by controlling the change of the input power of the proportional electromagnet.
The gas pressure-stabilizing and pressure-reducing combined valve is composed of two stages, a balance type valve structure and a pressure sensing structure of a metal diaphragm are adopted as an internal valve component of a first-stage valve, and fluororubber F108 is adopted for vulcanization treatment of the valve seal. The valve inside the secondary valve also adopts a balanced valve structure, and the valve is sealed by adopting fluororubber F108 for vulcanization treatment. The pressure sensing structure adopts a pressure sensing structure of a welded corrugated pipe.
The sealing at the valve structure adopts O-ring high-pressure sealing, and PTFE lubricating material is sprayed on the surface of a sealing pair in contact with the O-ring, so that the friction force at the valve dynamic sealing position is reduced, and the dynamic characteristic lag caused by product friction is reduced. As shown in fig. 2.
The metal diaphragm assembly adopts a welding type structure, the main diaphragm is made of beryllium bronze, the upper side and the lower side of the main diaphragm are respectively welded with the red copper pads, and the outer leakage rate of the product is improved through welding and metal sealing. The beryllium bronze membrane is modified by adopting sine waves, so that the rigidity characteristic of the beryllium bronze membrane is improved.
The bellows assembly adopts a welding form to weld the bellows, the mounting seat and the upper cover together, wherein the bellows adopts a form of welding bellows (bellows), and has smaller axial rigidity and larger displacement. The opening degree of the valve port of the beneficial secondary valve is adjusted. As shown in fig. 4.
The pressure regulation of the secondary valve is realized by regulating the proportional electromagnet, so that the fluctuation range of the output force value of the electromagnet is within the range of 2N under the large displacement change of the proportional electromagnet, and the stability of the output pressure of the secondary valve is ensured.
The gas pressure stabilizing and reducing combined valve adopts a two-stage pressure reducing structure, and reasonably designs respective pressure reducing ratios of two stages of pressure reduction, thereby realizing high-precision output of pressure. The first stage adopts a mechanical pressure reducing valve, and the second stage adopts an electric proportional pressure reducing valve.
Aiming at the problem of large upstream pressure change, the primary pressure reducing valve adopts a reverse unloading type main structure to balance the air pressure acting on the valve under the action of the inlet pressure, so that the influence of air source pressure fluctuation is reduced, and aiming at the problem of high upstream pressure, the primary pressure reducing valve adopts a metal diaphragm type structure to improve the pressure resistance.
Aiming at the problems of adjustable downstream pressure and high precision, the secondary pressure reducing valve adopts the main body form of an electromagnetic proportional valve, the valve body adopts a reverse unloading structure, the interference of inlet pressure is further reduced, and meanwhile, the driving element of a proportional electromagnet is adopted, so that the stability of output pressure is ensured on the premise of ensuring the flow. Aiming at the problem of high output precision, a pressure closed-loop control method is mainly adopted, outlet pressure is collected through a pressure sensor, the output force value of the proportional electromagnet is adjusted, and the stability and the output precision of the output pressure are ensured. And aiming at flow fluctuation, a pressure sensing element of a welded corrugated pipe is adopted, so that low additional rigidity and large linear displacement are realized.
The invention solves the problem of pressure precision control in a high-precision gas supply system, can realize large pressure, can realize pressure output of 0.05-0.2 MPa under the condition of large-range input (0.4-8 MPa), has self-adaptive and adjustable output pressure, and simultaneously ensures the pressure stabilizing precision of +/-5 KPa. The output precision of the pressure stabilizing and reducing valve is 2.5 percent. The problem of current decompression surge damping valve can't realize independently self-adaptation regulation is solved, further improve current decompression surge damping valve's output precision simultaneously, possess functions such as automatic break-make.
Those skilled in the art will appreciate that the details not described in the present specification are well known.

Claims (10)

1. The utility model provides a big decompression of high accuracy is than automatic pressure regulating's gaseous steady voltage decompression combination valve which characterized in that: the device comprises a primary pressure reducing valve and a secondary pressure reducing valve, wherein the primary pressure reducing valve comprises an adjusting rod (1), a primary valve upper cover (2), a spring upper top plate (3), a main spring (4), a spring lower top plate (5), a primary ejector rod (6), a metal diaphragm assembly (7), a primary valve assembly (8), a primary valve spring (9), a primary lower mounting seat (10) and a primary metal sealing gasket (11); the secondary pressure reducing valve comprises a proportional electromagnet (12), a corrugated pipe assembly (13), a secondary ejector rod (14), a secondary guide damping block (15), a switching support (16), a secondary valve assembly (17), a secondary valve spring (18), a base body (19), a secondary metal sealing gasket (20), a secondary lower mounting seat (21) and a primary damping hole plate (22);
the first-stage pressure reducing valve is arranged on the right side of the base body, and the second-stage pressure reducing valve is arranged on the left side of the base body
Specifically, the first-stage valve assembly (8) is in a reverse unloading structure form, a cylindrical step cavity is axially formed in the first-stage valve assembly, the diameter of an upper cylinder is smaller than that of a lower cylinder, a first-stage valve spring (9) is installed in the lower cylinder cavity, a boss is designed at the top of the first-stage valve assembly (8), two inclined holes are formed in the boss, and the two inclined holes penetrate through the axial cylindrical step cavity; a sealing groove is formed in the outer surface of the first-stage valve assembly (8), and a sealing ring and a sealing baffle are mounted on the sealing groove;
a blind hole is formed in the first-stage lower mounting seat (10), and the first-stage valve assembly (8) is mounted in the blind hole; the primary lower mounting seat (10) is mounted on the base body (19), and a primary metal sealing gasket (11) is mounted between the primary lower mounting seat (10) and the base body (19);
the primary damping pore plate (22) is arranged on an upper end stop hole on the right side of the base body (19) through a screw, the primary damping pore plate and the base body are in clearance fit, and after the primary damping pore plate (22) is arranged in place, the primary damping pore plate is just contacted with the upper end face of the primary valve assembly (8);
the primary ejector rod (6) is inserted into a guide hole of the primary damping pore plate (22), and the metal diaphragm assembly (7) is arranged in a positioning groove on the right side of the base body and is positioned above the primary damping pore plate (22);
the lower spring top plate (5) is installed on the metal diaphragm assembly (7), the main spring (4) is installed on the upper side of the lower spring top plate (5), the upper spring top plate (3) is installed on the upper side of the main spring (4), the primary valve upper cover (2) is installed on the upper portion of the right side of the base body (19) through screws, the metal diaphragm assembly (7) is located between the primary valve upper cover (2) and the base body (19), and the lower spring top plate (5), the main spring (4) and the upper spring top plate (3) are located inside the primary valve upper cover (2);
the adjusting rod (1) is connected with the primary valve upper cover (2) through threads, and a bulge at the lower end of the adjusting rod (1) is in contact with the spring upper top plate (3);
the secondary valve component (17) is in a reverse unloading structure form, a cylindrical step cavity is axially formed in the secondary valve component, the diameter of an upper cylinder is smaller than that of a lower cylinder, a secondary valve spring (18) is installed in the lower cylinder cavity, a sealing groove is formed in the outer surface of the secondary valve component (17), and a sealing ring and a sealing baffle are installed on the sealing groove; a V-shaped hole is processed at the top end of the secondary valve component (17);
a blind hole is formed in the second-stage lower mounting seat (21), and the second-stage valve assembly (17) is mounted in the blind hole; the secondary lower mounting seat (21) is mounted on the base body (19), and a secondary metal sealing gasket (20) is mounted between the secondary lower mounting seat (21) and the base body (19);
the secondary guide damping block (15) is arranged in an upper end stop hole on the left side of the base body (19) through a screw, and the guide length in the secondary guide damping block (15) is 5-10 times of the diameter of an inner hole of the guide hole;
the secondary ejector rod (14) is arranged in a guide hole of the secondary guide damping block (15); the lower side of the secondary ejector rod (14) is conical in shape, a blind hole with the diameter r1 is formed in the lower side, a blind hole with the diameter r2 is formed in one side of the top end of the blind hole, and the blind hole with the diameter r2 is penetrated through the blind hole with the diameter r 1; the conical shape below the secondary ejector rod (14) is contacted with a V-shaped hole at the top end of the secondary valve component (17);
the corrugated pipe assembly (13) comprises a corrugated pipe, a lower supporting surface and an upper fixing surface, wherein the corrugated pipe is positioned in the middle and is connected with the lower supporting surface, the upper fixing surface and the lower supporting surface in a welding mode; a guide hole is processed on the upper fixing surface;
the corrugated pipe assembly (13) is arranged on the base body (19) and is positioned above the secondary guide damping block (15); after the installation is in place, the top end of the secondary ejector rod (14) is inserted into a guide hole of the upper fixing surface of the corrugated pipe assembly (13);
the switching bracket (16) is arranged above the left side of the base body (19), and the proportional electromagnet (12) is positioned above the corrugated pipe assembly (13) and is fixed on the base body (19);
a high-pressure cavity is processed among the right inlet of the base body, the first-stage valve port and the sealing groove of the first-stage valve assembly; a medium pressure cavity is processed among the first-stage valve port, the metal diaphragm component (7) and the second-stage valve port; and a low-pressure cavity is processed among the right outlet of the base body, the secondary valve port and the secondary valve component.
2. The high-precision large-decompression-ratio automatic pressure-regulating gas pressure-stabilizing and pressure-reducing combined valve according to claim 1, characterized in that: the first-stage valve assembly (8) adopts a vulcanized rubber form to vulcanize fluororubber on the metal framework, the upper cylindrical diameter of the inner axial cylindrical step cavity is 0.8-1.1 mm, and the aperture of two inclined holes at the boss is 0.5-0.8 mm.
3. The high-precision large-decompression-ratio automatic pressure-regulating gas pressure-stabilizing and pressure-reducing combined valve according to claim 1, characterized in that: mount pad (10) blind hole inner wall spraying polytetrafluoroethylene under the one-level, polytetrafluoroethylene thickness 20 ~ 30um, the one-level after the spraying cooperation between mount pad blind hole and the one-level valve subassembly adopts little clearance fit down, and clearance control is between 4um to 8 um.
4. The high-precision large-decompression-ratio automatic pressure-regulating gas pressure-stabilizing and pressure-reducing combined valve according to claim 1, characterized in that: a knife edge sealing ring is arranged in the middle of an annular area where the primary lower mounting seat (10) is in contact with the primary metal sealing gasket (11), the height of the knife edge sealing ring is 0.15mm, and the knife edge angle is 60 degrees;
the middle of an annular area of the base body (19) contacted with the primary metal sealing gasket (11) is provided with a V-shaped sealing waterline, the depth of the sealing waterline is 0.2, and the angle of the V-shaped angle is 60 degrees.
5. The high-precision large-decompression-ratio automatic pressure-regulating gas pressure-stabilizing and pressure-reducing combined valve according to claim 1, characterized in that: the metal diaphragm component (7) adopts a beryllium bronze metal diaphragm which adopts a sine wave embossing form, red copper sealing gaskets with the thickness of 0.9mm are respectively welded on the upper surface and the lower surface of the beryllium bronze metal diaphragm, and the sealing property between the red copper sealing gaskets and the beryllium bronze metal diaphragm is superior to 1x10 -9 Pam 3 /s。
6. A high-precision large-decompression-ratio automatic pressure-regulating gas pressure-stabilizing and pressure-reducing combined valve according to claim 5, characterized in that: when the metal membrane component (7) is arranged in the positioning groove on the right side of the base body (19), the sine wave boss direction of the metal membrane component (7) is downwards arranged;
on the surface of the metal membrane component (7) contacting with the substrate (19), 2 knife edge sealing rings are processed on the substrate (19), the height of the knife edge sealing ring is 0.15mm, and the knife edge angle is 60 degrees.
7. The high-precision large-decompression-ratio automatic pressure-regulating gas pressure-stabilizing and pressure-reducing combined valve according to claim 1, characterized in that: 2 knife edge sealing rings are processed on the ring surface of the upper cover (2) of the primary valve, which is contacted with the metal diaphragm component (7), the height of the knife edge sealing ring is 0.15mm, and the knife edge angle is 60 degrees.
8. The high-precision large-decompression-ratio automatic pressure-regulating gas pressure-stabilizing and pressure-reducing combined valve according to claim 1, characterized in that: the secondary valve component (17) adopts a vulcanized rubber form to vulcanize fluororubber on the metal framework, and the upper cylindrical diameter of the inner axial cylindrical step cavity is 0.8-1.1 mm.
9. The high-precision large-decompression-ratio automatic pressure-regulating gas pressure-stabilizing and pressure-reducing combined valve according to claim 1, characterized in that: polytetrafluoroethylene is sprayed on the inner wall of the blind hole of the second-stage lower mounting seat (21), the thickness of the polytetrafluoroethylene is 20-30 um, the matching between the blind hole of the second-stage lower mounting seat and the second-stage valve component after spraying adopts small clearance fit, and the clearance is controlled between 4um and 8 um.
10. The high-precision large-decompression-ratio automatic pressure-regulating gas pressure-stabilizing and pressure-reducing combined valve according to claim 1, characterized in that: a secondary metal sealing gasket (20) is arranged between the secondary lower mounting seat (21) and the substrate (19), a knife edge sealing ring is arranged in the middle of an annular area where the secondary lower mounting seat (21) is in contact with the secondary metal sealing gasket (20), the height of the knife edge sealing ring is 0.15mm, and the knife edge angle is 60;
a V-shaped sealing waterline is arranged in the middle of an annular area where the base body (19) is contacted with the secondary metal sealing gasket (20), the depth of the sealing waterline is 0.2, and the angle of the V-shaped angle is 60 degrees.
CN202110037425.XA 2021-01-12 2021-01-12 High-precision large-pressure-reduction-ratio automatic pressure-regulating gas pressure-stabilizing pressure-reducing combined valve Active CN112747156B (en)

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CN112747156B (en) * 2021-01-12 2022-10-14 北京卫星制造厂有限公司 High-precision large-pressure-reduction-ratio automatic pressure-regulating gas pressure-stabilizing pressure-reducing combined valve
EP4423828A1 (en) * 2021-10-26 2024-09-04 Vitesco Technologies GmbH Throttle-valve actuator unit, fuel cell system comprising a throttle-valve actuator unit of this kind, and motor vehicle comprising a fuel cell system of this kind
CN114183694B (en) * 2021-11-04 2024-03-26 北京卫星制造厂有限公司 Gas circuit pressure regulating device
CN114183133B (en) * 2021-12-14 2024-08-20 四川航天烽火伺服控制技术有限公司 Pneumatic wellhead pressure pulse signal generating device and petroleum exploitation equipment
CN115899341B (en) * 2023-02-27 2023-05-09 新乡市华航航空液压设备有限公司 Absolute pressure reducing valve with automatic air suction function
CN116464812B (en) * 2023-06-19 2023-09-05 余姚市三力信电磁阀有限公司 High-pressure intelligent grading pressure regulating valve and control method

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JP2547717B2 (en) * 1984-04-24 1996-10-23 日本電信電話株式会社 Two-stage pressure reducing valve device
CN2382918Y (en) * 1999-08-06 2000-06-14 唐琳海 Three stage directly function reversal pressure reducing valve for compressed natural gas automobile
CN202561169U (en) * 2012-04-24 2012-11-28 温州市安帝博格燃气动力设备有限公司 Pressure reducer
CN106090363B (en) * 2016-08-31 2018-02-23 常德翔宇设备制造有限公司 Two-stage gas pressure reducing valve
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