CN102518843B - Composite control digital valve for pressure and flow rate of high-pressure gas - Google Patents
Composite control digital valve for pressure and flow rate of high-pressure gas Download PDFInfo
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- CN102518843B CN102518843B CN 201110406156 CN201110406156A CN102518843B CN 102518843 B CN102518843 B CN 102518843B CN 201110406156 CN201110406156 CN 201110406156 CN 201110406156 A CN201110406156 A CN 201110406156A CN 102518843 B CN102518843 B CN 102518843B
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Abstract
The invention discloses a composite control digital valve for a pressure and a flow rate of a high-pressure gas. Eight secondary high-pressure pneumatic switch valves formed by a group of two primary high-pressure pneumatic high-speed switch valves in combination with a secondary valve body are arranged in a digital valve body, one end of the digital valve body is provided with a gas inlet cavity, and the other end of the digital valve body is provided with a gas outlet cavity and a gas outlet valve; gas outlets are arranged at the eight secondary high-pressure pneumatic switch valves on the digital valve body, seven of the eight secondary high-pressure pneumatic switch valves are arranged in juxtaposition, and valve port areas are sequentially determined according to binary codes; the gas inlet cavity and the gas outlet cavity are provided with a pressure and temperature sensor respectively; and the gas outlet valve is the eighth secondary high-pressure pneumatic switch valve. According to the invention, the secondary high-pressure pneumatic switch valves and a binary code digital control scheme are combined to ensure that the control precision reaches 1/128; the secondary high-pressure pneumatic switch valves are jointly started via a controller by using pressure and temperature parameters of the gas inlet cavity and the gas outlet cavity to control the flow rate of the gas in real time, and finally the pressure and the flow rate of the high-pressure gas are compositely controlled.
Description
Technical field
The present invention relates to a kind of gas digital valve, especially relate to a kind of high-pressure gas pressure flow composite control digital valve.
Background technique
Instantaneous expansion is large because having, explosive force reaches by force the characteristics such as temperature wide accommodation and high-energy-density for the pressurized gas of working pressure more than 10MPa, makes high-pressure pneumatic system be applied in a lot of fields.In addition, the peculiar explosion-proof of pressurized gas, easily the characteristics such as acquired and spatter property make it can complete a lot of conventional air pressure and the incompetent work of hydraulics.
But the automatization level of high-pressure pneumatic system is still not high, and aspect the pressure control of gas, most widely used reduction valve as example, is manually controlled at present the reduction valve development comparatively ripe, but lacked ripe universal electronic control pressure reducing valve in the pressure valve.Aspect the flow control of gas, existing pneumatic flowrate valve still rests on the adjusting of valve port area aperture but not on actual overcurrent flow.Now relevant pressurized gas mass flow rate valve and pressure-flow combined valve still lack the correlative study report, and its reason is that mainly the pressurized gas mass flow rate is difficult to accurately control by conventional method.
the automation of high-pressure pneumatic system has urgent demand for pressure valve and Flow valve, and the compressibility of gas has determined that its pressure is controlled and flow control can all be summed up in the point that on the Flow-rate adjustment of valve port, and need to gather the pressure and temperature parameter of upstream and downstream due to the closed loop control of gas mass flow, therefore can utilize this pressure and temp signal combination control program to carry out the closed loop control of pressure and temp, this just can be so that realize the compound control of pressure and flow on same set of device, to develop comparatively ripe digital valve control program introducing high-pressure pneumatic field at low-pressure pneumatic and Hydraulic Field again, whole control system design and control are simplified, reliability also is improved.The present invention namely is based on the high-pressure gas pressure flow combined valve device of this principle and theory design.
Summary of the invention
The object of the present invention is to provide a kind of high-pressure gas pressure flow composite control digital valve, pressure and the temperature parameter by air-inlet cavity and outlet chamber in collection high-pressure gas pressure flow composite control digital valve, regulate make a slip of the tongue stream flow and Applied Digital valve control program of actual valve and accurately control, realize on same set of mechanical device the compound control to high-pressure gas pressure and flow.
The technical solution adopted for the present invention to solve the technical problems is:
Arranging by two one-level high-pressure pneumatic high-speed switch valves in high-pressure gas pressure flow composite control digital valve valve body is one group of eight secondary high-pressure pneumatic switch valve that consist of in conjunction with the secondary valve body, high-pressure gas pressure flow composite control digital valve valve body one end is provided with air-inlet cavity, the other end is provided with outlet chamber and gas outlet valve, and eight secondary high-pressure pneumatic switch valves correspondence on high-pressure gas pressure flow composite control digital valve valve body is provided with relief opening; Wherein seven secondary high-pressure pneumatic switch valves are set up in parallel, and seven secondary high-pressure pneumatic switch valve valve port areas that are set up in parallel are determined according to binary coding successively; Described air-inlet cavity is equipped with the first pressure transducer and the first temperature transducer; Described outlet chamber is equipped with the second pressure transducer and the second temperature transducer; Described gas outlet valve is the 8th secondary high-pressure pneumatic switch valve.
Described eight secondary high-pressure pneumatic switch valve arrangements are identical, the secondary valve inner is separated into control chamber and spool chamber by the ladder-type spool, the first spring in control chamber contacts with the large end face of ladder-type spool, and the small end face of ladder-type spool is over against the valve port of the Laval-cavity nozzle structure that seal ring is housed; The suction port of first one-level high-pressure pneumatic high-speed switch valve is communicated with high-pressure air source and spool chamber respectively; The air outlet of first one-level high-pressure pneumatic high-speed switch valve is communicated with the suction port of control chamber and second one-level high-pressure pneumatic high-speed switch valve respectively, and second one-level high-pressure pneumatic speed-sensitive switch valve air gate is connected with relief opening.
Described one-level high-pressure pneumatic speed-sensitive switch valve arrangement is identical, and its one-step valve body inside is separated into high voltage terminal and low voltage terminal by taper valve core; The suction port of described high voltage terminal is the suction port of one-level high-pressure pneumatic high-speed switch valve, and the air outlet of low voltage terminal is the air outlet of one-level high-pressure pneumatic high-speed switch valve; Be provided with the taper valve core large end face of two pores and the second spring contact of high voltage terminal, the taper valve core conical surface contacts at low voltage terminal with high-speed switch electromagnet.
The beneficial effect that the present invention has is:
Secondary high-pressure pneumatic switch valve valve port area is combined with the binary-coded digit control program, make the control accuracy of valve reach 1/128, and utilize the pressure and temperature parameter of air-inlet cavity and the outlet chamber of high-pressure gas pressure flow composite control digital valve, making up keying secondary high-pressure pneumatic switch valve by controller controls in real time to gas mass flow, the final realization carried out the compound control of pressure and flow to pressurized gas, and the pressure of pressurized gas and design and the control of flow control system are simplified, reliability is improved.
Description of drawings
Fig. 1 is high-pressure gas pressure flow composite control digital valve structural representation.
Fig. 2 is the structural representation of secondary high-pressure pneumatic switch valve.
Fig. 3 is the structural representation of one-level high-pressure pneumatic high-speed switch valve.
in figure: 1, air-inlet cavity, 2, the first pressure transducer, 3, the first temperature transducer, 4, the secondary valve body, 5, the second pressure transducer, 6, the second temperature transducer, 7, outlet chamber, 8, gas outlet valve, 9, relief opening, 10, one-level high-pressure pneumatic high-speed switch valve, 11, high-pressure air source, 12, control chamber, 13, spool chamber, 14, seal ring, 15, valve port, 16, the ladder-type spool, 17, the first spring, 18, high voltage terminal, 19, suction port, 20, the one-level valve body, 21, the speed-sensitive switch electromagnet, 22, low voltage terminal, 23, the air outlet, 24, taper valve core, 25, the second spring.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
As Fig. 1, Fig. 2, shown in Figure 3, arranging by two one-level high-pressure pneumatic high-speed switch valves 10 in high-pressure gas pressure flow composite control digital valve valve body is one group of eight secondary high-pressure pneumatic switch valve that consist of in conjunction with secondary valve body 4, high-pressure gas pressure flow composite control digital valve valve body one end is provided with air-inlet cavity 1, the other end is provided with outlet chamber 7 and gas outlet valve 8, and eight secondary high-pressure pneumatic switch valves correspondence on high-pressure gas pressure flow composite control digital valve valve body is provided with relief opening 9; Wherein seven secondary high-pressure pneumatic switch valves are set up in parallel, and seven secondary high-pressure pneumatic switch valve valve port 15 areas that are set up in parallel are determined according to binary coding successively; Described air-inlet cavity 1 is equipped with the first pressure transducer 2 and the first temperature transducer 3; Described outlet chamber 7 is equipped with the second pressure transducer 5 and the second temperature transducer 6; Described gas outlet valve 8 is the 8th secondary high-pressure pneumatic switch valve.
Described air-inlet cavity 1 is communicated with by seven secondary high-pressure pneumatic switch valves arranging side by side with outlet chamber 7.
Described eight secondary high-pressure pneumatic switch valve arrangements are identical, secondary valve body 4 inside are separated into control chamber 12 and spool chamber 13 by ladder-type spool 16, the first spring 17 in control chamber 12 contacts with the large end face of ladder-type spool 16, and the small end face of ladder-type spool 16 is over against the valve port 15 of the Laval-cavity nozzle structure that seal ring 14 is housed; The suction port of first one-level high-pressure pneumatic high-speed switch valve is communicated with high-pressure air source 11 and spool chamber 13 respectively; The air outlet of first one-level high-pressure pneumatic high-speed switch valve is communicated with the suction port of control chamber 12 and second one-level high-pressure pneumatic high-speed switch valve respectively, and second one-level high-pressure pneumatic speed-sensitive switch valve air gate is connected with relief opening 9.
Described one-level high-pressure pneumatic high-speed switch valve 10 structures are identical, and its one-step valve body 20 inside are separated into high voltage terminal 18 and low voltage terminal 22 by taper valve core 24; The suction port 19 of described high voltage terminal 18 is the suction port of one-level high-pressure pneumatic high-speed switch valve 10, and the air outlet 23 of low voltage terminal 22 is the air outlet of one-level high-pressure pneumatic high-speed switch valve 10; Taper valve core 24 large end faces that are provided with two pores contact with the second spring 25 of high voltage terminal 18, and taper valve core 24 conical surfaces contact at low voltage terminal 22 with high-speed switch electromagnet 21.
Below in conjunction with accompanying drawing, sketch working principle of the present invention:
The air-inlet cavity of high-pressure gas pressure flow composite control digital valve shown in Figure 1 and outlet chamber are separately installed with pressure and temperature sensor (p
i, T
iAnd p
o, T
o), when high-pressure gas pressure flow composite control digital valve was used as pressure valve, controller was according to the pressure p of outlet chamber 7
oOpen and close seven secondary high-pressure pneumatic switch valves and gas outlet valve 8, the pressure p of giving vent to anger
oDuring lower than goal pressure, pressurized gas enter load end through seven secondary high-pressure pneumatic switch valves by outlet chamber 7 from air-inlet cavity 1, and combination opens and closes seven secondary high-pressure pneumatic switch valve (q to controller according to error size
1... q
7), make precision reach 1/128; The pressure p of giving vent to anger
oDuring higher than goal pressure, controller is opened bleed valve 8 (q
r).When high-pressure gas pressure flow composite control digital valve was used as Flow valve, controller was according to the temperature T of air-inlet cavity 1
i, pressure p
iAnd the pressure p of outlet chamber 7
oCombination opens and closes seven secondary high-pressure pneumatic switch valves.Concrete high-pressure gas pressure flow composite control digital valve gas mass flowmeter is calculated as shown in formula (1):
Q wherein
3Be high-pressure gas pressure flow composite control digital valve gas mass flow, α is the contracted flow coefficient, A
3Be seven secondary high-pressure pneumatic switch valve opening gross areas that combination is opened, T
iBe the temperature of gas in air-inlet cavity 1, k is specific heat ratio, and for air k=1.4, R is gas constant, for air R=287J/ (kgK), p
iBe the pressure of gas in air-inlet cavity 1, p
oBe the pressure of gas in outlet chamber 7, b is outlet chamber 7 and air-inlet cavity 1 gas critical pressure ratio.
Secondary high-pressure pneumatic switch valve shown in Figure 2 is that the one-level high-pressure pneumatic high-speed switch valve 10 of a group drives by two.In the time of need to closing secondary high-pressure pneumatic switch valve, opening first one-level high-pressure pneumatic high-speed switch valve 10 (is V
1), pressurized gas enter control chamber 12 from high-pressure air source 11, and ladder-type spool 16 is at gas pressure (p
c, p
iAnd p
o) and the effect of the first spring 17 power under close, after control chamber 12 gas pressures were closed near high-pressure air source 11 pressure and secondary high-pressure pneumatic switch valve, closing first one-level high-pressure pneumatic high-speed switch valve 10 (was V
1); In the time of need to opening secondary high-pressure pneumatic switch valve, opening second one-level high-pressure pneumatic high-speed switch valve 10 (is V
2), pressurized gas enter atmosphere from control chamber 12 through relief opening 9, and ladder-type spool 16 is at gas pressure (p
c, p
iAnd p
o) and the effect of the first spring 17 power under open, drop to after to a certain degree secondary high-pressure pneumatic switch valve is opened at control chamber 12 gas pressures equally, closing second one-level high-pressure pneumatic high-speed switch valve 10 (is V
2) get final product.Concrete secondary high-pressure pneumatic switch valve gas mass flowmeter is calculated as shown in formula (2):
Q wherein
2Be secondary high-pressure pneumatic switch valve gas mass flow, α is the contracted flow coefficient, A
2 Be valve port 15 opening areas, T
iBe the temperature of gas in air-inlet cavity 1, k is specific heat ratio, and for air k=1.4, R is gas constant, for air R=287J/ (kgK), p
iBe the pressure of gas in air-inlet cavity 1 for high-pressure air source 11, p
oBe the pressure of gas in outlet chamber 7 for valve port 15, b is outlet chamber 7 and air-inlet cavity 1 gas critical pressure ratio.
Adopt this pair of high frequency sound one-level high-pressure pneumatic high-speed switch valve 10 to add valve port 15 and be the secondary high-pressure pneumatic switch valve of Laval-cavity nozzle structural type, its airtight control chamber 12 can avoid one-level high-pressure pneumatic high-speed switch valve 10 high speed switch electromagnets 21 to switch on for a long time in conjunction with the control mode of one-level high-pressure pneumatic high-speed switch valve 10, has reduced the valve power consumption; The more important thing is because the 23 gas overcurrent times of air outlet of one-level high-pressure pneumatic high-speed switch valve 10 are shorter, can avoid violent throttling cooling and cause freezing, improving the reliability of secondary high-pressure pneumatic switch valve and high-pressure gas pressure flow composite control digital valve.Valve port 15 runners of daraf(reciprocal of farad) that structural type can improve the back pressure ratio of secondary high-pressure pneumatic switch valve greatly in addition, reducing the pressure loss and also reduce simultaneously the fluctuation of pressure and temperature, high-pressure gas pressure flow composite control digital valve is greatly simplified on controlling.
High frequency sound high-pressure pneumatic high-speed switch valve 10 shown in Figure 3 is bi-bit bi-pass formula cone valve.Adopting high-speed switch electromagnet 21 simple in structure, with low cost and that reliability is high is electromechanical converter; Be different from traditional cone valve type pilot valve, this taper valve core 24 contacts at low voltage terminal 22 all the time with high-speed switch electromagnet 21, when high-speed switch electromagnet 21 no electric circuit, effect inferior pyramidal spool 24 at gas differential pressure and the second spring 25 is in closed condition, only needs to start when high-pressure gas pressure flow composite control digital valve flow need to be adjusted that high-speed switch electromagnet 21 is of short duration to be opened.
Claims (3)
1. high-pressure gas pressure flow composite control digital valve, it is characterized in that: arranging by two one-level high-pressure pneumatic high-speed switch valves (10) in high-pressure gas pressure flow composite control digital valve valve body is one group of eight secondary high-pressure pneumatic switch valve that consist of in conjunction with secondary valve body (4), high-pressure gas pressure flow composite control digital valve valve body one end is provided with air-inlet cavity (1), the other end is provided with outlet chamber (7) and gas outlet valve (8), and eight secondary high-pressure pneumatic switch valves correspondence on high-pressure gas pressure flow composite control digital valve valve body is provided with relief opening (9), wherein seven secondary high-pressure pneumatic switch valves are set up in parallel, and seven secondary high-pressure pneumatic switch valve valve port (15) areas that are set up in parallel are determined according to binary coding successively, described air-inlet cavity (1) is equipped with the first pressure transducer (2) and the first temperature transducer (3), described outlet chamber (7) is equipped with the second pressure transducer (5) and the second temperature transducer (6), described gas outlet valve (8) is the 8th secondary high-pressure pneumatic switch valve.
2. a kind of high-pressure gas pressure flow composite control digital valve according to claim 1, it is characterized in that: described eight secondary high-pressure pneumatic switch valve arrangements are identical, secondary valve body (4) is inner is separated into control chamber (12) and spool chamber (13) by ladder-type spool (16), the first spring (17) in control chamber (12) contacts with the large end face of ladder-type spool (16), and the small end face of ladder-type spool (16) is over against the valve port (15) of the Laval-cavity nozzle structure that seal ring (14) is housed; The suction port of first one-level high-pressure pneumatic high-speed switch valve is communicated with high-pressure air source (11) and spool chamber (13) respectively; The air outlet of first one-level high-pressure pneumatic high-speed switch valve is communicated with the suction port of control chamber (12) and second one-level high-pressure pneumatic high-speed switch valve respectively, and second one-level high-pressure pneumatic speed-sensitive switch valve air gate is connected with relief opening (9).
3. a kind of high-pressure gas pressure flow composite control digital valve according to claim 2, it is characterized in that: described one-level high-pressure pneumatic high-speed switch valve (10) structure is identical, and its one-step valve body (20) is inner is separated into high voltage terminal (18) and low voltage terminal (22) by taper valve core (24); The suction port (19) of described high voltage terminal (18) is the suction port of one-level high-pressure pneumatic high-speed switch valve (10), and the air outlet (23) of low voltage terminal (22) is the air outlet of one-level high-pressure pneumatic high-speed switch valve (10); Taper valve core (24) large end face that is provided with two pores contacts with second spring (25) of high voltage terminal (18), and taper valve core (24) conical surface contacts at low voltage terminal (22) with high-speed switch electromagnet (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110406156 CN102518843B (en) | 2011-12-08 | 2011-12-08 | Composite control digital valve for pressure and flow rate of high-pressure gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110406156 CN102518843B (en) | 2011-12-08 | 2011-12-08 | Composite control digital valve for pressure and flow rate of high-pressure gas |
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| Publication Number | Publication Date |
|---|---|
| CN102518843A CN102518843A (en) | 2012-06-27 |
| CN102518843B true CN102518843B (en) | 2013-06-12 |
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| CN 201110406156 Expired - Fee Related CN102518843B (en) | 2011-12-08 | 2011-12-08 | Composite control digital valve for pressure and flow rate of high-pressure gas |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890513B (en) * | 2012-10-11 | 2015-08-19 | 曹兵 | Digital differential control system for gas-liquid flow |
| CN109869363B (en) * | 2019-03-28 | 2020-12-29 | 上海豪高机电科技有限公司 | Hydraulic intelligent control valve |
| CN112965537B (en) * | 2021-01-29 | 2024-04-09 | 中汽创智科技有限公司 | Control device and system |
| CN115539687B (en) * | 2022-11-07 | 2023-05-30 | 东莞理工学院 | Gas safety valve and working method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4307750A (en) * | 1978-05-08 | 1981-12-29 | Ledeen Flow Control Systems, Inc. | System for precise position control |
| CN1696518A (en) * | 2005-05-31 | 2005-11-16 | 武汉航天波纹管股份有限公司 | Electrohydraulic digital valve at high speed |
| CN1746545A (en) * | 2005-08-25 | 2006-03-15 | 浙江大学 | Superpressure pneumatic pressure-release valve with adjusting gas source switch |
| CN102245906A (en) * | 2008-10-10 | 2011-11-16 | 诺海卓有限公司 | Digital hydraulic system |
| CN202360823U (en) * | 2011-12-08 | 2012-08-01 | 中国计量学院 | Digital valve for compositely controlling pressure and flow of high-pressure gas |
-
2011
- 2011-12-08 CN CN 201110406156 patent/CN102518843B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4307750A (en) * | 1978-05-08 | 1981-12-29 | Ledeen Flow Control Systems, Inc. | System for precise position control |
| CN1696518A (en) * | 2005-05-31 | 2005-11-16 | 武汉航天波纹管股份有限公司 | Electrohydraulic digital valve at high speed |
| CN1746545A (en) * | 2005-08-25 | 2006-03-15 | 浙江大学 | Superpressure pneumatic pressure-release valve with adjusting gas source switch |
| CN102245906A (en) * | 2008-10-10 | 2011-11-16 | 诺海卓有限公司 | Digital hydraulic system |
| CN202360823U (en) * | 2011-12-08 | 2012-08-01 | 中国计量学院 | Digital valve for compositely controlling pressure and flow of high-pressure gas |
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| Publication number | Publication date |
|---|---|
| CN102518843A (en) | 2012-06-27 |
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