CN113375057A - Pressure volume automatic gas distribution system and control method thereof - Google Patents
Pressure volume automatic gas distribution system and control method thereof Download PDFInfo
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- CN113375057A CN113375057A CN202110628843.6A CN202110628843A CN113375057A CN 113375057 A CN113375057 A CN 113375057A CN 202110628843 A CN202110628843 A CN 202110628843A CN 113375057 A CN113375057 A CN 113375057A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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Abstract
The invention discloses a pressure volume automatic gas distribution system and a control method thereof, wherein the system comprises a feed gas system, a pressure volume automatic gas distribution system and a pressure volume automatic gas distribution system, wherein the feed gas system is used for storing feed gas; the constant temperature system is used for providing heat required in the process of converting the feed gas from a liquid state to a gas state, so that the temperature of the feed gas is kept constant, and the gas distribution error caused by the temperature influence is reduced; the distribution system adopts low-pressure distribution in the distribution process, so that the distribution error caused by gas compressibility in the high-pressure distribution process is eliminated; the gas storage system is used for uniformly mixing and storing gas entering from the upstream; the control system is used for controlling and monitoring the feed gas system, the constant temperature system, the allocation system and the gas storage system and can respond in time; the invention economically solves the contradiction between the gas distribution precision and the pressure fluctuation, the environment temperature, the system temperature and the uneven gas mixing to the maximum extent, has simple and reliable structure and can meet the gas use requirements of various places.
Description
The technical field is as follows:
the invention relates to a gas distribution system and a control method thereof, in particular to a pressure volume automatic gas distribution system and a control method thereof, which are used for gas electric, gas heating and bathing equipment enterprises and gas detection departments for accurately and continuously configuring experimental and detection gas of various different types of gas at the same time.
Background art:
at present, the most used devices in China are low-pressure rubber bag gas distribution, low-pressure wet gas storage tank gas distribution and high-pressure dry tank gas distribution, the three devices are gas distribution by a volume metering method, and the precision can only reach W +/-2%. But the low-pressure rubber bag has small gas distribution and gas distribution amount, long gas distribution and mixing time and poor safety performance; the low-pressure wet gas storage tank gas distribution system has large floor area, higher manufacturing cost, fussy gas replacement and long gas distribution and mixing time; although the high-pressure dry tank gas distribution overcomes the two defects, the continuous gas distribution requirement cannot be met. In addition, the gas distribution method adopts a continuous metering method, can meet the requirement of continuous gas utilization, but has low gas distribution precision and can not meet the high inspection requirement.
In Europe and America, Japan and other countries are mostly full-automatic gas distribution, analysis and control are carried out by a central microcomputer, correction data are provided by an online testing instrument, the preparation proportion is adjusted, and the data of the heat value and the specific gravity of various types of fuel gas are displayed at any time. However, the gas distribution system is expensive, and the single component gas supply in China is small and the price is high, so that the system is very limited in use and cannot be widely used.
The invention content is as follows:
in order to solve the problems, the invention provides an economical and novel pressure volume automatic air distribution system and a control method thereof, which integrate the advantages of low-pressure wet tank air distribution, high-pressure dry tank air distribution and continuous metering method air distribution and combine with microcomputer control technology.
The technical scheme provided by the invention is as follows: a pressure volume automatic gas distribution system comprises
The feed gas system comprises a feed gas storage device for storing feed gas, a pressure reducing valve and a stop valve, wherein the pressure reducing valve and the stop valve are arranged at a gas outlet of the feed gas storage device;
the constant temperature system is used for providing heat required in the process of converting the raw material gas output by the raw material system from a liquid state to a gas state, so that the temperature of the raw material gas is kept constant;
the system comprises a blending system, wherein raw material gas with constant temperature enters the blending system, low-pressure gas distribution is adopted in the gas distribution process, the low-pressure gas distribution pressure is not more than 0.1MPa, and gas distribution errors caused by gas compressibility in the high-pressure gas distribution process are eliminated;
the gas storage system is used for uniformly mixing and storing the gas entering from the upstream allocation system;
a vacuum pump is also arranged between the allocation system and the gas storage system;
and the control system is used for controlling and monitoring the vacuum pump, the raw material gas system, the constant temperature system, the allocation system and the gas storage system.
The constant temperature system comprises a closed water receiver, a special coil arranged in the closed water receiver, a heat engine arranged on the closed water receiver, a thermometer and a temperature sensor, wherein the heat engine heats the water temperature of the closed water receiver, the special coil enables the raw material gas to exchange heat with the closed water receiver to output the raw material gas with constant temperature, and the thermometer and the temperature sensor detect and transmit temperature signals;
the distribution system comprises a gas distribution tank group, a proportional valve arranged at a gas inlet of the gas distribution tank group and a gas outlet control valve arranged at a gas outlet of the gas distribution tank group, wherein the gas distribution tank group is one or more groups, and each group of gas distribution tank group is provided with the proportional valve and the gas outlet control valve; each gas distribution tank group comprises a gas distribution tank or a plurality of gas distribution tanks, and the gas distribution tanks are provided with high-precision pressure sensors; and carrying out the high-speed plantation at the maximum volume of not more than 0.3m according to different volumes of a plurality of gas distribution tanks of each gas distribution tank group.
The gas distribution tank group is characterized in that a plurality of gas distribution tanks of each gas distribution tank group are connected in series, adjacent gas distribution tanks are connected through volume control valves, and the gas distribution tank at the foremost end of the airflow is provided with a gas outlet.
A plurality of distribution tanks of each group of distribution tank group are connected in parallel, an air inlet pneumatic control valve is installed at the air inlet of each distribution tank, and a one-way valve is installed at the air outlet of each distribution tank.
A plurality of gas distribution tanks of each group of gas distribution tank group are connected in series through a volume control valve to form a series branch, and then more than two series branches are connected in parallel, an air inlet pneumatic control valve is installed at the air inlet of the first gas distribution tank of each series branch, a one-way valve is installed at the air outlet, and at least one series branch contains more than two gas distribution tanks.
The gas storage system comprises one or more groups of gas storage tank groups, wherein the groups of gas storage tank groups are arranged in parallel, each group of gas storage tank group comprises one or more gas storage tanks, the gas inlet end of each gas storage tank is provided with a gas mixing pneumatic control valve, and the gas outlet end is provided with a gas outlet valve; the plurality of gas storage tanks of each gas storage tank group are connected in parallel; the air inlet of the air storage tank is provided with a spray pipe extending into the air storage tank, and the spray pipe is provided with a nozzle; the structure of the nozzle is arranged by adopting the Venturi tube principle.
And a distribution pipe is arranged between the allocation system and the gas storage system, is connected with a gas outlet of the allocation system and a gas inlet of the gas storage system and is also connected with a vacuum pump.
The control system comprises an industrial control computer, a data acquisition card, a pressure sensor and a pressure transmitter, wherein the pressure sensor on the gas distribution tank sends the measured data into the industrial control computer through the pressure transmitter and the data acquisition card for processing, and output signals are fed back to the proportional valve, the gas inlet control valve, the volume control valve, the gas outlet control valve and the gas mixing control valve.
The technical scheme of the invention also provides a control method of the pressure volume automatic gas distribution system, which comprises the following steps:
step 2, detecting whether the pressure of the gas distribution tank is less than 5KPa, and detecting whether the gas distribution tank leaks gas; the pressure of the tested gas distribution tank is more than or equal to 5KPa, and the step 3 is carried out;
step 3, starting a vacuum pump to pump out residual gas in the gas distribution tank when the gas distribution type in the gas distribution tank is inconsistent with the last gas distribution type, and then entering step 4; the gas distribution tank is consistent with the last gas distribution type, and the step 4 is directly carried out;
step 4, air is supplied to the air distribution tank for air distribution, the control system controls the proportional valve of the upstream air path of the selected air distribution tank group to be opened, and the air inlet air control valve or the volume control valve of the selected air distribution tank is opened;
step 5, collecting a pressure signal in the gas distribution tank by a control system, sending a control instruction, carrying out proportional adjustment on the opening of a proportional valve, and closing the proportional valve when the pressure of the gas distribution tank reaches a set value;
step 6, the pressure of the gas distribution tank is more than or equal to 5KPa, and the gas inlet control valve is closed; the pressure of the gas distribution tank is less than 5KPa, the gas inlet air control valve is opened, and then the step 7 is carried out;
and 7, mixing and storing the gas, opening a gas mixing control valve, introducing the gas into a gas storage tank for mixing, and closing the gas mixing control valve of the gas storage tank when the pressure value in the gas storage tank reaches a set value of 5 KPa.
The invention has the beneficial effects that: the gas distribution device is economical and novel, integrates the advantages of pressure gas distribution and volume gas distribution, is controlled by a microcomputer, and can accurately and continuously prepare various gases. The gas distribution device economically solves the contradiction between gas distribution precision and pressure fluctuation, between environment temperature and system temperature and between uneven gas mixing to the maximum extent, has a simple and reliable structure, and can meet the gas use requirements of various places.
Description of the drawings:
FIG. 1 is a block diagram of the system architecture of the present invention;
FIG. 2 is a schematic diagram of the gas distribution of the present invention;
FIG. 3 is a schematic diagram of a first embodiment of the air distribution tank bank of FIG. 2;
FIG. 4 is a schematic diagram of a second embodiment of the air distribution tank bank of FIG. 2;
FIG. 5 is a schematic diagram of a third embodiment of the air distribution tank bank of FIG. 2;
FIG. 6 is a schematic diagram of the gas tank array of FIG. 2;
FIG. 7 is a block diagram of the nozzle of the present invention;
FIG. 8 is a block diagram of a nozzle of the present invention;
FIG. 9 is a diagram of the control cabinet structure of the present invention;
FIG. 10 is a gas distribution flow diagram of the present invention;
wherein: 18-control cabinet, 19-industrial control computer, 20-data collection card, 21-transmitter, 22-switch power supply, 23-alarm indicator light, 24-display, 100-raw gas system, 110-raw gas storage device, 120-pressure reducing valve, 130-stop valve, 200-constant temperature system, 210-closed water storage device, 220-heat engine, 230-thermometer, 240-special coil pipe, 250-temperature sensor, 300-allocation system, 310-gas distribution tank group, 311-gas distribution tank, 312-volume control valve, 313-pressure sensor, 314-one-way valve, 315-gas inlet air control valve, 320-proportional valve, 330-gas outlet air control valve, 400-gas storage system, 410-gas storage tank group, 411-air storage tank, 412-air mixing control valve, 413-spray pipe, 414-air outlet valve, 415-nozzle, 500-control system and 600-vacuum pump.
The specific implementation mode is as follows:
in order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
As shown in fig. 1 and 2, the pressure-volume automatic gas distribution system includes a raw material gas system 100, which includes a raw material gas storage device 110, a pressure reducing valve 120 and a stop valve 130, wherein the pressure reducing valve 120 and the stop valve 130 are installed at a gas outlet of the raw material gas storage device 110 for storing raw material gas; the constant temperature system 200 is used for providing heat required in the process of converting the raw material gas from a liquid state to a gas state, so that the temperature of the raw material gas is kept constant, and the gas distribution error caused by the temperature influence is reduced; the allocation system 300 adopts low-pressure gas distribution in the gas distribution process, so that gas distribution errors caused by gas compressibility in the high-pressure gas distribution process are eliminated; the gas storage system 400 is used for uniformly mixing and storing gas entering from the upstream; and the control system 500 is used for controlling and monitoring the raw material gas system 100, the constant temperature system 200, the blending system 300 and the gas storage system 400 and can respond in time. The thermostatic system 200 includes a closed reservoir 210, a dedicated coil 240 installed in the closed reservoir, a heat engine 220 provided on the closed reservoir 210, a thermometer 230, and a temperature sensor 250, the dedicated coil 240 allowing a high-speed airflow to pass through the closed reservoir 210 for a long time to increase its heat exchange effect, and the thermometer 230 to assist in determining the accuracy of the temperature sensor 250. The blending system 300 comprises an air distribution tank group 310, a proportional valve 320 arranged at an air inlet of the air distribution tank group 310 and an air outlet control valve 330 arranged at an air outlet of the air distribution tank group, wherein at least one air distribution tank group 310 is provided, and each air distribution tank group 310 is provided with the proportional valve 320 and the air outlet control valve 330. A distribution pipe is further installed between the dispensing system 300 and the gas storage system 400, the distribution pipe is connected to the gas outlet of the dispensing system 300 and the gas inlet of the gas storage system 400, and the distribution pipe is further connected to a vacuum pump 600. When another gas different from the last type needs to be configured, the computer opens or closes the required valve according to the requirement, the vacuum pump 600 is started, and the residual gas is exhausted, so that the impurity gas in the pipeline and the tank group is reduced as little as possible, and the gas distribution precision is ensured.
As shown in fig. 3, 4, and 5, the gas distribution tank group 310 includes at least one gas distribution tank 311, a high-precision pressure sensor 313 is disposed on the gas distribution tank 311, and the gas distribution tanks 311 are not uniform in size and do not exceed 0.3m for cultivation. Mainly because of the compressibility of the gas, its error increases with the increase of the pressure, for this reason, adopt the low-pressure distribution (distribution pressure is not greater than 0.1 MPa) in the distribution process, dispel the distribution error caused by compressibility of the gas in the distribution process of the high pressure; on the basis, in order to further eliminate the gas distribution error caused by pressure difference, the gas distribution pressures of the gas distribution tanks with different volumes are consistent as much as possible, and the gas distribution error caused by the compressibility of the gas in the different gas distribution tanks 311 is reduced to the greatest extent.
As shown in fig. 3, in a first embodiment of the air distribution tank group 310, the air distribution tank group 310 is formed by connecting more than two air distribution tanks 311 in series, adjacent air distribution tanks 311 are connected by using a volume control valve 312, and the air distribution tank 311 at the forefront of the air flow is provided with an air outlet.
As shown in fig. 4, in a second embodiment of the air distribution tank group 310, the air distribution tank group 310 is formed by connecting more than two air distribution tanks 311 in parallel, an air inlet pneumatic control valve 315 is installed at an air inlet of each air distribution tank 311, and a check valve 314 is installed at an air outlet of each air distribution tank.
As shown in fig. 5, in a third embodiment of the air distribution tank group 310, the air distribution tanks 311 are connected in series through the volume control valve 312 to form series branches, and then connected in parallel through more than two series branches, an air inlet pneumatic control valve 315 is installed at an air inlet of a first air distribution tank 311 of each series branch, a check valve 314 is installed at an air outlet, and at least one series branch contains more than two air distribution tanks 311.
As shown in fig. 6, 7 and 8, the gas storage system 400 includes at least one group of gas storage tank sets 410, the group of gas storage tanks 410 includes at least one gas storage tank 411, a gas mixing pneumatic control valve 412 is installed at a gas inlet end of each gas storage tank 411, and a gas outlet valve 414 is installed at a gas outlet end; the gas tank group 410 is formed by connecting more than two gas tanks 411 in parallel; the air inlet of the air storage tank 411 is provided with a spray pipe 413 extending into the air storage tank 411, the spray pipe 413 is provided with a nozzle 415, the density of the nozzle 415 on the spray pipe 413 is different according to the depth of the spray pipe 413 extending into the air storage tank 411, so that mixed gas is sprayed out at different rates on different layers, strong disturbance is generated on the gas existing in the gas distribution tank, the diffusion speed of gas molecules is increased, and the purpose of uniform gas mixing is achieved. The configuration of nozzle 415 is arranged using venturi principles.
As shown in fig. 9, due to the operation requirement, the control system 400 and other systems are located at different spatial positions, the whole control system components are all disposed in the control cabinet 18, the core of the control system is an industrial control computer 19 and a data acquisition card 20, the high-precision pressure sensor 313 on the gas distribution tank 311 sends the data thereof to the industrial control computer 19 through a transmitter 21, the data acquisition card 20 feeds the data thereof to the proportional valve 320, the gas inlet control valve 315, the volume control valve 312, the gas outlet control valve 330 and the gas mixing control valve 412 after being processed by control software, so as to control the opening and closing of the various valves. The switching power supply 22 is used to provide low voltage power. In the operation process, the operation interface of the control software can display the gas distribution condition to the operator in real time through the display 24, and if a fault occurs, the alarm indicating lamp 23 can remind the operator.
As shown in fig. 10, the control method of the pressure-volume automatic air distribution system is characterized in that: the method comprises the following steps that 1, in step S1, the type of gas to be configured is selected in a control system, and the control system automatically determines a required gas distribution tank group and gas distribution tanks required by each group of gas distribution tank groups;
step 2, S2, the pressure of the gas distribution tank is tested to be less than 5KPa, and whether the gas distribution tank leaks gas is detected; the pressure of the tested gas distribution tank is more than or equal to 5KPa, and the step 3 is carried out;
step 3, namely S3, the gas distribution type in the gas distribution tank is inconsistent with the last gas distribution type, the vacuum pump is started to pump out residual gas in the gas distribution tank, and then the step 4 is carried out; the gas distribution tank is consistent with the last gas distribution type, and the step 4 is directly carried out;
step 4, S4, air is supplied to the air distribution tank for air distribution, the control system controls the proportional valve of the upstream air path of the selected air distribution tank group to open, and the air inlet air control valve or the volume control valve of the selected air distribution tank opens;
step 5, namely S5, the control system collects pressure signals in the gas distribution tank, sends out control instructions, performs proportional adjustment on the opening of a proportional valve, and closes the proportional valve when the pressure of the gas distribution tank reaches a set value;
step 6, S6, the pressure of the gas distribution tank is more than or equal to 5KPa, and the gas inlet control valve is closed; the pressure of the gas distribution tank is less than 5KPa, the gas inlet air control valve is opened, and then the step 7 is carried out;
and 7, S7, mixing and storing the gas, opening the gas mixing air control valve, introducing the gas into the gas storage tank for mixing, and closing the gas mixing air control valve of the gas storage tank when the pressure value in the gas storage tank reaches a set value of 5 KPa.
The invention has the beneficial effects that: the gas distribution device is economical and novel, integrates the advantages of pressure gas distribution and volume gas distribution, is controlled by a microcomputer, and can accurately and continuously prepare various gases. The gas distribution device economically solves the contradiction between gas distribution precision and pressure fluctuation, between environment temperature and system temperature and between uneven gas mixing to the maximum extent, has a simple and reliable structure, and can meet the gas use requirements of various places.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. Pressure volume automatic gas distribution system, its characterized in that: comprises that
The feed gas system comprises a feed gas storage device for storing feed gas, a pressure reducing valve and a stop valve, wherein the pressure reducing valve and the stop valve are arranged at a gas outlet of the feed gas storage device;
the constant temperature system is used for providing heat required in the process of converting the raw material gas output by the raw material system from a liquid state to a gas state, so that the temperature of the raw material gas is kept constant;
the system comprises a blending system, wherein raw material gas with constant temperature enters the blending system, low-pressure gas distribution is adopted in the gas distribution process, the low-pressure gas distribution pressure is not more than 0.1MPa, and gas distribution errors caused by gas compressibility in the high-pressure gas distribution process are eliminated;
the gas storage system is used for uniformly mixing and storing the gas entering from the upstream allocation system;
a vacuum pump is also arranged between the allocation system and the gas storage system;
and the control system is used for controlling and monitoring the vacuum pump, the raw material gas system, the constant temperature system, the allocation system and the gas storage system.
2. The pressure volume automatic gas distribution system according to claim 1, characterized in that: the constant temperature system comprises a closed water receiver, a special coil arranged in the closed water receiver, a heat engine arranged on the closed water receiver, a thermometer and a temperature sensor, wherein the heat engine heats the water temperature of the closed water receiver, the feed gas and the heat exchange output temperature of the closed water receiver are kept constant by the aid of the special coil, and the thermometer detects and transmits temperature signals with the temperature sensor.
3. The pressure volume automatic gas distribution system according to claim 1, characterized in that: the distribution system comprises a gas distribution tank group, a proportional valve arranged at a gas inlet of the gas distribution tank group and a gas outlet control valve arranged at a gas outlet of the gas distribution tank group, wherein the gas distribution tank group is one or more groups, and each group of gas distribution tank group is provided with the proportional valve and the gas outlet control valve; each gas distribution tank group comprises a gas distribution tank or a plurality of gas distribution tanks, and the gas distribution tanks are provided with high-precision pressure sensors; and carrying out the high-speed plantation at the maximum volume of not more than 0.3m according to different volumes of a plurality of gas distribution tanks of each gas distribution tank group.
4. The pressure volume automatic gas distribution system according to claim 3, wherein: the gas distribution tank group is characterized in that a plurality of gas distribution tanks of each gas distribution tank group are connected in series, adjacent gas distribution tanks are connected through volume control valves, and the gas distribution tank at the foremost end of the airflow is provided with a gas outlet.
5. The pressure volume automatic gas distribution system according to claim 3, wherein: a plurality of distribution tanks of each group of distribution tank group are connected in parallel, an air inlet pneumatic control valve is installed at the air inlet of each distribution tank, and a one-way valve is installed at the air outlet of each distribution tank.
6. The pressure volume automatic gas distribution system according to claim 3, wherein: a plurality of gas distribution tanks of each group of gas distribution tank group are connected in series through a volume control valve to form a series branch, and then more than two series branches are connected in parallel, an air inlet pneumatic control valve is installed at the air inlet of the first gas distribution tank of each series branch, a one-way valve is installed at the air outlet, and at least one series branch contains more than two gas distribution tanks.
7. The pressure volume automatic gas distribution system according to claim 1, characterized in that: the gas storage system comprises one or more groups of gas storage tank groups, wherein the groups of gas storage tank groups are arranged in parallel, each group of gas storage tank group comprises one or more gas storage tanks, the gas inlet end of each gas storage tank is provided with a gas mixing pneumatic control valve, and the gas outlet end is provided with a gas outlet valve; the plurality of gas storage tanks of each gas storage tank group are connected in parallel; the air inlet of the air storage tank is provided with a spray pipe extending into the air storage tank, and the spray pipe is provided with a nozzle; the structure of the nozzle is arranged by adopting the Venturi tube principle.
8. The pressure volume automatic gas distribution system according to claim 1, characterized in that: and a distribution pipe is arranged between the allocation system and the gas storage system, is connected with a gas outlet of the allocation system and a gas inlet of the gas storage system and is also connected with a vacuum pump.
9. The pressure volume automatic gas distribution system according to claim 1, characterized in that: the control system comprises an industrial control computer, a data acquisition card, a pressure sensor and a pressure transmitter, wherein the pressure sensor on the gas distribution tank sends the measured data into the industrial control computer through the pressure transmitter and the data acquisition card for processing, and output signals are fed back to the proportional valve, the gas inlet control valve, the volume control valve, the gas outlet control valve and the gas mixing control valve.
10. The control method of the pressure volume automatic air distribution system is characterized by comprising the following steps:
step 1, selecting the type of gas to be configured in a control system, and automatically determining a gas distribution tank group required by the control system and gas distribution tanks required by each gas distribution tank group;
step 2, detecting whether the pressure of the gas distribution tank is less than 5KPa, and detecting whether the gas distribution tank leaks gas; the pressure of the tested gas distribution tank is more than or equal to 5KPa, and the step 3 is carried out;
step 3, starting a vacuum pump to pump out residual gas in the gas distribution tank when the gas distribution type in the gas distribution tank is inconsistent with the last gas distribution type, and then entering step 4; the gas distribution tank is consistent with the last gas distribution type, and the step 4 is directly carried out;
step 4, air is supplied to the air distribution tank for air distribution, the control system controls the proportional valve of the upstream air path of the selected air distribution tank group to be opened, and the air inlet air control valve or the volume control valve of the selected air distribution tank is opened;
step 5, collecting a pressure signal in the gas distribution tank by a control system, sending a control instruction, carrying out proportional adjustment on the opening of a proportional valve, and closing the proportional valve when the pressure of the gas distribution tank reaches a set value;
step 6, the pressure of the gas distribution tank is more than or equal to 5KPa, and the gas inlet control valve is closed; the pressure of the gas distribution tank is less than 5KPa, the gas inlet air control valve is opened, and then the step 7 is carried out;
and 7, mixing and storing the gas, opening a gas mixing control valve, introducing the gas into a gas storage tank for mixing, and closing the gas mixing control valve of the gas storage tank when the pressure value in the gas storage tank reaches a set value of 5 KPa.
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| JPS5464766A (en) * | 1977-10-31 | 1979-05-24 | Matsushita Electric Works Ltd | Method for producing mixed gas |
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| CN102913757A (en) * | 2011-08-05 | 2013-02-06 | 上海梦地仪器制造有限公司 | Pressure-volume automatic gas distribution system and control method thereof |
| CN206626406U (en) * | 2017-03-27 | 2017-11-10 | 孙强丹 | The lazy envelope system of circulation based on source of the gas servomechanism installation |
| BR112019000910A2 (en) * | 2016-10-10 | 2019-04-30 | Pietro Fiorentini S.P.A. | control system for a natural gas distribution network, natural gas distribution network and method for controlling it |
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2021
- 2021-06-07 CN CN202110628843.6A patent/CN113375057A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5464766A (en) * | 1977-10-31 | 1979-05-24 | Matsushita Electric Works Ltd | Method for producing mixed gas |
| US4277254A (en) * | 1980-02-15 | 1981-07-07 | Energy Systems, Incorporated | Control system and apparatus for producing compatible mixtures of fuel gases |
| CN1888515A (en) * | 2006-07-28 | 2007-01-03 | 周玉成 | Dynamic distributing system for standard gas |
| CN201575299U (en) * | 2009-12-15 | 2010-09-08 | 天津市华迈燃气技术发展有限公司 | Gasification-gas mixing device for liquefied petroleum gas |
| CN102913757A (en) * | 2011-08-05 | 2013-02-06 | 上海梦地仪器制造有限公司 | Pressure-volume automatic gas distribution system and control method thereof |
| BR112019000910A2 (en) * | 2016-10-10 | 2019-04-30 | Pietro Fiorentini S.P.A. | control system for a natural gas distribution network, natural gas distribution network and method for controlling it |
| CN206626406U (en) * | 2017-03-27 | 2017-11-10 | 孙强丹 | The lazy envelope system of circulation based on source of the gas servomechanism installation |
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