CN1383042A - Automatic controller for lowering pressure of high-pressure gas by volume expansion - Google Patents
Automatic controller for lowering pressure of high-pressure gas by volume expansion Download PDFInfo
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- CN1383042A CN1383042A CN 02111841 CN02111841A CN1383042A CN 1383042 A CN1383042 A CN 1383042A CN 02111841 CN02111841 CN 02111841 CN 02111841 A CN02111841 A CN 02111841A CN 1383042 A CN1383042 A CN 1383042A
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- decompression
- displaying meter
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Abstract
The invention discloses the device for automatic controlling the decompression of volume expansion of high-pressure gas. It is the ultra-high pressure pneuamtic decompression system. Based on certain control requirement and control algorithm as well as the pressure data collected from the low-pressure volume expansion container, the instruction sent by the controller controls the on/off time of the high pressure pneuamtic switch value. Thus, it realizes the automatic controlling the volume decompression process of the high pressure or ultra-high pressure gas. Comparing with the method of throttling decompression, the invented method can save energy 10-35% in the decompression process. The invention possesses the features of simple equipment and easy to connect to the energy control loop.
Description
Technical field
The present invention relates to a kind of lowering pressure of high-pressure gas by volume expansion control method and automaton.
Background technology
In the background technology field, with function of the present invention the most approaching be the pressure adjustment assembly of throttle-type, i.e. all gases reduction valve.Although current decompression valve technology comparative maturity, and can satisfy discontinuous operation, only to the functional application that the pneumatic system of requirement is arranged, it is to realize pressure controlled by throttling control.And throttling control is a kind of irreversible energy variation process, for continuous working, the demanding pneumatic power of power performance system, has bigger energy loss, therefore is unfavorable for the efficient utilization of system.
The cubical expansion applied element that reduces pressure is an expansion vessel.Its principle of work is to regulate the output pressure of high-pressure pneumatic system by pneumatic on-off valve and expansion vessel.Cubical expansion decompression principle is that under certain condition, the volume that the pressure of a certain amount of gas is full of with it is inversely proportional to according to the state equation work of gas, and promptly volume increases, the pressure reduction.The effect of expansion vessel is by increasing volume the gases at high pressure of upstream to be reduced to the desired low-pressure gas of work.If expand waiting under the gentle constant entropy state, it is a reversible process, basically off-energy not.By PLC control mode and PID regulation control switch valve, expander can accurately be controlled the output pressure of conventional pneumatic system, and control mode is flexible, and control accuracy can be within 1.0kPa.By comparison, in conventional pneumatic system, throttling is regulated pressure and is wanted 5～10% of loss system energy to overcome frictional resistance; In the high-pressure pneumatic system, the energy loss that throttling causes will be bigger.Cubical expansion decompression control also is on process and the state different with expenditure and pressure, does not have restriction loss in the cubical expansion decompression process; Post-decompression low-pressure gas can be stored in the low pressure gasholder experience a period of time and the external world carries out thermal compensation.In this course,, and there is time enough that system is carried out energy supplement, just can makes the energy of loss obtain the additional and recovery of part, thereby guarantee the efficient utilization of system capacity as long as outside energy is enough high.Theoretical analysis is verified, and the extra-high of 30MPa pressure is eased down to the pressure of 1.0～5.0MPa, and the volume decompression control mode can reduce energy loss 10～35% than expenditure and pressure control mode.
Summary of the invention
The purpose of this invention is to provide a kind of automatic controller for lowering pressure of high-pressure gas by volume expansion that integrates high-pressure pneumatic operation valve, pressure transducer, flow sensor, controller, cubical expansion container, realize automatic control lowering pressure of high-pressure gas by volume expansion.
The technical solution used in the present invention is as follows:
It comprises bleed pressure sensor and Displaying Meter, high-pressure stop valve, high-pressure pneumatic switch valve, controller, cubical expansion container, decompression pressure transducer and Displaying Meter, decompression temperature sensor and Displaying Meter, low-pressure shutoff valve; The air intake opening of high-pressure pneumatic switch valve links to each other with high-pressure stop valve with joint by high pressure line, and the gas outlet links to each other with the air intake opening of joint with the cubical expansion container by high pressure line, and the control end wiring is connected with the output port of controller; The gas outlet of cubical expansion container links to each other with an end of low-pressure shutoff valve by joint, and the other end of low-pressure shutoff valve links to each other with joint with low-pressure line; Decompression pressure transducer and Displaying Meter and decompression and temperature sensor and Displaying Meter are installed on the cubical expansion container, and their signal output lead is connected with the input end port of controller.
Controller is provided with data acquisition, data processing and control output module; Bleed pressure sensor and Displaying Meter, decompression pressure transducer and Displaying Meter, decompression temperature sensor and Displaying Meter output lead insert separately the data acquisition module of being made up of sample/hold circuit and A/D change-over circuit respectively, enter the data processing module formed by CPU, program and data-carrier store, enter the control output module of forming by power amplification circuit after, be connected on the control end of high-pressure pneumatic switch valve.
Pressure transducer and temperature sensor provide the pressure and temperature data of high-pressure air source and cubical expansion decompression state respectively; Controller is provided with functional modules such as data acquisition, data processing and control output, can gather required pressure and temperature data in real time, and according to the control requirement of setting and control algolithm to controlling the switching time of high-pressure pneumatic switch valve; The gases at high pressure that the assurance of cubical expansion container enters are realized the cubical expansion decompression process; The parameter value of decompression state can controlled device be gathered and computing in real time, thereby realizes the automatic control to the volume decompression process of gases at high pressure.
The advantage that the present invention has is: device is formed simple, has automatic control function, does not have restriction loss in the cubical expansion decompression control procedure of gases at high pressure, compares with expenditure and pressure, can be energy-conservation in decompression process 10～35%, and the capacity usage ratio height.The present invention is integrated in one machinery, electronics and fluid control, is typical electromechanical integration automatic control system.The present invention can install easily or connect in the energy controlling unit of gases at high pressure power system, realization is to the automatic control of lowering pressure of high-pressure gas by volume expansion, thereby reach the purpose of efficiently utilizing gases at high pressure power system energy, it can be applicable to pressurized air is that the fields such as energy management system of power, particularly pressurized air are in the energy management system of Pneumatic automobile of power.
Description of drawings
Fig. 1 is a structural principle synoptic diagram of the present invention;
Fig. 2 is the block scheme of controller principle of the present invention.
Embodiment
As shown in Figure 1, described gases at high pressure volume decompression device is made up of high-pressure pneumatic switch valve 4, controller 5, cubical expansion container 6, high-pressure stop valve 2, pressure transducer and Displaying Meter 1 and 7, temperature sensor and Displaying Meter 8, low-pressure shutoff valve 9, high pressure line and joint 3, low-pressure line and joint 10 etc.
The air intake opening of high-pressure pneumatic switch valve 4 links to each other with high-pressure stop valve 2 with high pressure line by joint, and the gas outlet links to each other with the air intake opening of high pressure line with cubical expansion container 6 by joint, and the control end wiring is connected with the output port of controller 5.High-pressure pneumatic switch valve 4 is controlled by the control signal that controller 5 sends, be used to control cycle and the time that gases at high pressure enter expansion vessel 6, and produce less pressure when making gas by high-pressure pneumatic switch valve 4 and fall, irreversible energy loss is little, helps energy-conservation.
The air intake opening of cubical expansion container 6 links to each other with the gas outlet of high pressure line with high-pressure pneumatic switch valve 4 by joint, and the gas outlet links to each other with low-pressure shutoff valve 9 by joint.Cubical expansion container 6 is one can bear high pressure, and having the gas tank of set volume, its effect is that the gases at high pressure that enter are expanded in jar by adiabatic process or polytropic process, and gaseous tension is reduced, realize decompression, thereby eliminate the irreversible energy loss in the expenditure and pressure process.
Pressure transducer and Displaying Meter 7 are installed on the cubical expansion container 6, and its signal output lead connects with the input port of controller 5.Pressure transducer and Displaying Meter 7 show and are transferred to controller with the gas pressure value of cubical expansion container, are convenient to monitoring, and realize providing information and data to the control of switch valve for controller.
Pressure transducer and Displaying Meter 1 are installed in the exit of high-pressure air source, i.e. the inflow point of gases at high pressure volume decompression device, and its signal output lead connects with the input port of controller 5.Pressure transducer and Displaying Meter 1 show and are transferred to controller with the gas pressure value of high-pressure air source, are convenient to monitoring, and realize providing information and data to the control of switch valve for controller.
Temperature sensor and Displaying Meter 8 are installed on the cubical expansion container 6, and its signal output lead connects with the input port of controller 5.Temperature sensor and Displaying Meter 8 show and are transferred to controller with the gas temperature value of cubical expansion container, are convenient to monitoring, and realize providing information and data to the control of switch valve for controller
As shown in Figure 2, controller 5 is provided with functional modules such as data acquisition, data processing and control output.Data acquisition module is made up of sampling hold circuit and A/D change-over circuit, is used to gather the pressure of high-pressure air source, the operating parameter values such as pressure and temperature of cubical expansion depressed gas; Data processing module comprises CPU program and data-carrier store, can handle sampled data according to control requirement and algorithm, and deliver to the input amplifier of control output; The control output module mainly is the power amplification circuit of driving switch valve work, is used for controlling the opening and closing time and the cycle of high-pressure pneumatic switch valve, to realize the control to the volume decompression system.
High-pressure stop valve 2 is used to guarantee the static sealing and the safety of gases at high pressure volume decompression device; Low-pressure shutoff valve 9 is used to regulate the gas output quantity of usefulness gas element or system.
Described gases at high pressure volume decompression device generally is installed between high-pressure air source and the air motor (pneumatic apparatus).During work, at first high-pressure stop valve 2 is opened to the maximum open state, make the air intake opening of the expedite arrival high-pressure pneumatic switch of gases at high pressure valve 4, then can be according to the decompression control requirement of system, carry out the control of opening and closing state by 5 pairs of high-pressure pneumatic switch valves of controller 4, thereby the decompression process of control gases at high pressure in the cubical expansion container and decompression index are to satisfy the power needs of air motor.
Claims (2)
1. automatic controller for lowering pressure of high-pressure gas by volume expansion, it is characterized in that: it comprises bleed pressure sensor and Displaying Meter (1), high-pressure stop valve (2), high-pressure pneumatic switch valve (4), controller (5), cubical expansion container (6), decompression pressure transducer and Displaying Meter (7), decompression temperature sensor and Displaying Meter (8), low-pressure shutoff valve (9); The air intake opening of high-pressure pneumatic switch valve (4) links to each other with high-pressure stop valve (2) with joint (3) by high pressure line, the gas outlet links to each other with the air intake opening of joint with cubical expansion container (6) by high pressure line, and the control end wiring is connected with the output port of controller (5); The gas outlet of cubical expansion container (6) links to each other by the end of joint with low-pressure shutoff valve (9), and the other end of low-pressure shutoff valve (9) links to each other with joint (10) with low-pressure line; Decompression pressure transducer and Displaying Meter (7) and decompression and temperature sensor and Displaying Meter (8) are installed on the cubical expansion container (6), and their signal output lead is connected with the input end port of controller (5).
2. automatic controller for lowering pressure of high-pressure gas by volume expansion according to claim 1 is characterized in that: said controller (5) is provided with data acquisition, data processing and control output module; Bleed pressure sensor and Displaying Meter (1), decompression pressure transducer and Displaying Meter (7), decompression temperature sensor and Displaying Meter (8) output lead insert separately the data acquisition module of being made up of sample/hold circuit and A/D change-over circuit respectively, enter the data processing module formed by CPU, program and data-carrier store, enter the control output module of forming by power amplification circuit after, be connected on the control end of high-pressure pneumatic switch valve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02111841 CN1383042A (en) | 2002-05-24 | 2002-05-24 | Automatic controller for lowering pressure of high-pressure gas by volume expansion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02111841 CN1383042A (en) | 2002-05-24 | 2002-05-24 | Automatic controller for lowering pressure of high-pressure gas by volume expansion |
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| Publication Number | Publication Date |
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| CN1383042A true CN1383042A (en) | 2002-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02111841 Pending CN1383042A (en) | 2002-05-24 | 2002-05-24 | Automatic controller for lowering pressure of high-pressure gas by volume expansion |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100557395C (en) * | 2008-01-07 | 2009-11-04 | 浙江大学 | Ultra-high pressure air-actuated clearance-dimension-pressure characteristic test apparatus |
| CN101901007A (en) * | 2010-07-13 | 2010-12-01 | 山东电力研究院 | Compressed air measuring and controlling system and method for power plant instrument |
| CN102099758A (en) * | 2008-03-13 | 2011-06-15 | 罗伯特·B·查飞 | Method and apparatus for monitoring and controlling pressure in an inflatable device |
| CN102636392A (en) * | 2012-04-27 | 2012-08-15 | 上海市塑料研究所 | Touch control type volume expansion testing device suitable for 21.0MPa pressure level polytetrafluoroethylene hose assembly |
| CN103075376A (en) * | 2013-01-30 | 2013-05-01 | 南京理工大学 | Volume expansion type high-pressure gas decompressing system |
| CN103422893B (en) * | 2012-05-25 | 2015-07-08 | 周登荣 | Aerodynamic engine assembly used for pneumatic automobile |
| CN106234911A (en) * | 2016-07-29 | 2016-12-21 | 北京速原中天科技股份公司 | A kind of pressure relief device for supertension sterilize device |
| CN113803637A (en) * | 2020-06-11 | 2021-12-17 | 中国石油化工股份有限公司 | High-pressure gas pressure control system |
-
2002
- 2002-05-24 CN CN 02111841 patent/CN1383042A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100557395C (en) * | 2008-01-07 | 2009-11-04 | 浙江大学 | Ultra-high pressure air-actuated clearance-dimension-pressure characteristic test apparatus |
| CN102099758A (en) * | 2008-03-13 | 2011-06-15 | 罗伯特·B·查飞 | Method and apparatus for monitoring and controlling pressure in an inflatable device |
| CN102099758B (en) * | 2008-03-13 | 2013-09-11 | 罗伯特·B·查飞 | Method and apparatus for monitoring and controlling pressure in an inflatable device |
| CN101901007A (en) * | 2010-07-13 | 2010-12-01 | 山东电力研究院 | Compressed air measuring and controlling system and method for power plant instrument |
| CN102636392A (en) * | 2012-04-27 | 2012-08-15 | 上海市塑料研究所 | Touch control type volume expansion testing device suitable for 21.0MPa pressure level polytetrafluoroethylene hose assembly |
| CN103422893B (en) * | 2012-05-25 | 2015-07-08 | 周登荣 | Aerodynamic engine assembly used for pneumatic automobile |
| CN103075376A (en) * | 2013-01-30 | 2013-05-01 | 南京理工大学 | Volume expansion type high-pressure gas decompressing system |
| CN103075376B (en) * | 2013-01-30 | 2015-03-11 | 南京理工大学 | Volume expansion type high-pressure gas decompressing system |
| CN106234911A (en) * | 2016-07-29 | 2016-12-21 | 北京速原中天科技股份公司 | A kind of pressure relief device for supertension sterilize device |
| CN113803637A (en) * | 2020-06-11 | 2021-12-17 | 中国石油化工股份有限公司 | High-pressure gas pressure control system |
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