CN110743329B - Dry pulse gas generation gas circuit - Google Patents
Dry pulse gas generation gas circuit Download PDFInfo
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- CN110743329B CN110743329B CN201911043147.8A CN201911043147A CN110743329B CN 110743329 B CN110743329 B CN 110743329B CN 201911043147 A CN201911043147 A CN 201911043147A CN 110743329 B CN110743329 B CN 110743329B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
Abstract
The invention relates to a dry pulse gas generation gas path, which is generally divided into a normal pressure area, a low pressure area and a high pressure area; and the first two-way electromagnetic valve, the second two-way electromagnetic valve and the third two-way electromagnetic valve which are adjacent to the measuring chamber are constant pressure areas. The air pump is stopped at the third two-way electromagnetic valve and the fifth two-way electromagnetic valve through the air tank to form a low-pressure area. The air pump is a high-pressure area through the air dryer, the first one-way valve, the three-way electromagnetic valve, the first pressure control valve, the second one-way valve, the second pressure control valve and the third one-way valve, and the first two-way electromagnetic valve, the second two-way electromagnetic valve and the fourth two-way electromagnetic valve. The gas path of the invention is simplified and reasonable, compared with the method that the drying agent is directly used in the measuring chamber and the pulse gas generating device is independently installed, the atmosphere drying effect of the measuring chamber is obviously improved and the dry pulse gas can be provided.
Description
Technical Field
The invention belongs to the field of precision detection, and particularly relates to a dry pulse gas generation gas circuit.
Background
In industrial measurement, a relatively closed measuring chamber needs to be purged by dry pulse gas for auxiliary measurement, and the measuring chamber needs to be maintained in a dry gas environment in the whole measuring process, so that the moisture of a sample is prevented from influencing a measuring result. In low temperature fluidity tests such as the freezing point and the freezing point of petroleum products, the test chamber needs to be kept dry, and pulse gas needs to be generated to assist in testing the pour point.
For pulse generation, a common gas pulse generation device, such as an air compressor, cannot ensure the dryness of generated pulse gas, and has a large volume and is difficult to integrate; for the drying of the measuring chamber, the drying agent is put into the measuring chamber, so that only partial space can be kept dry, and the drying agent is not convenient to replace due to the complex disassembly and assembly of the measuring chamber.
Disclosure of Invention
In order to solve the problem that a measuring chamber needs a dry environment and pulse gas, the invention provides a dry pulse gas generation gas circuit with a simple structure and multiplexing of drying and pulse gas generation functions.
In order to achieve the above object, the present invention provides the following technical solutions.
A dry pulse gas generation gas circuit comprises a gas tank, a gas pump, an air dryer, a first one-way valve, a three-way electromagnetic valve, a first pressure control valve, a second one-way valve, a second pressure control valve, a third one-way valve, a first two-way electromagnetic valve, a second two-way electromagnetic valve, a measuring chamber, a third two-way electromagnetic valve, a fourth two-way electromagnetic valve and a fifth two-way electromagnetic valve.
The export of gas pitcher is connected with the air inlet of air pump, the gas outlet of air pump is connected with air dryer's one end, air dryer's the other end is connected with the air inlet of first check valve, the gas outlet of first check valve is connected with the one end of second two-way solenoid valve, the other end and the measuring chamber UNICOM of second two-way solenoid valve, the one end and the measuring chamber UNICOM of third two-way solenoid valve, the other end and the one end of fifth two-way solenoid valve of third two-way solenoid valve are connected, the other end of fifth two-way solenoid valve is emptied.
The gas circuit between the first one-way valve and the second two-way solenoid valve is connected with an inlet of a three-way solenoid valve, one outlet of the three-way solenoid valve is connected with a gas inlet of the second one-way valve through a first pressure control valve, the other outlet of the three-way solenoid valve is connected with a gas inlet of a third one-way valve through a second pressure control valve, and a gas outlet of the second one-way valve and a gas outlet of the third one-way valve are connected to the measuring chamber through the first two-way solenoid valve.
And the air path between the first one-way valve and the second two-way electromagnetic valve is also connected with one end of a fourth two-way electromagnetic valve, the other end of the fourth two-way electromagnetic valve is connected with one end of a fifth two-way electromagnetic valve, and one end of the fifth two-way electromagnetic valve is also connected with an inlet of an air tank.
And the normal pressure region is formed from the measuring chamber to the adjacent first two-way electromagnetic valve, second two-way electromagnetic valve and third two-way electromagnetic valve.
The air pump is in a low-pressure area from the third two-way electromagnetic valve and the fifth two-way electromagnetic valve through the air tank.
The air pump is a high-pressure area through the air dryer, the first one-way valve, the three-way electromagnetic valve, the first pressure control valve, the second one-way valve, the second pressure control valve and the third one-way valve, and the first two-way electromagnetic valve, the second two-way electromagnetic valve and the fourth two-way electromagnetic valve.
During circulation drying, the measuring chamber is communicated with the air dryer, the air pump and the air tank to form a closed circulation air path, the air pump plays a role in air circulation, and the air dryer absorbs air moisture to achieve a drying effect in the air circulation process.
When the pulse gas occurs, the gas pump compresses the gas in the low-pressure area to the high-pressure area, the pressure of the required pulse gas is adjusted by controlling the pressure control valve, and the first electromagnetic valve switch is controlled to generate the pulse gas to purge the measuring chamber.
Furthermore, the second two-way electromagnetic valve and the third two-way electromagnetic valve are closed when the air pump performs pressure boosting or pulse air is discharged, so that the condition that the measuring chamber generates condensed water due to severe influence on the air pressure of the measuring chamber in the two processes is avoided; meanwhile, the condition that a large amount of external wet gas rushes in due to incomplete sealing of the measuring chamber structure when the pressure of the measuring chamber is reduced is avoided.
A dry pulse gas generation method utilizes the gas path, and specifically comprises the following steps:
before pulse gas collection is carried out, the first two-way electromagnetic valve is opened, the three-way electromagnetic valve switches channels, residual pulse gas in the high-pressure area can be circularly dried through the gas pump, and the gas before next pulse gas collection is ensured to be in a dry state.
When pulse gas collection is carried out, the second two-way electromagnetic valve, the third two-way electromagnetic valve, the fourth two-way electromagnetic valve and the fifth two-way electromagnetic valve are closed, the three-way electromagnetic valve is used for gating a pulse gas end, at the moment, the gas pump pumps gas in a low-pressure area to gas in a high-pressure area, and the gas pressure of the measuring chamber in a two-end cut-off state cannot be changed, so that a sample in the measuring chamber cannot be interfered in a pulse gas collection stage.
When pulse gas is needed, the pulse gas with the needed pressure can be obtained by controlling the on-off of the first two-way electromagnetic valve for detection.
After the pulse air is blown and swept, the fourth two-way electromagnetic valve and the fifth two-way electromagnetic valve can be opened to carry out pressure relief, the fifth two-way electromagnetic valve is closed after the pressure relief is finished, the air path is in a circulating drying state, the second two-way electromagnetic valve, the third two-way electromagnetic valve and the fourth two-way electromagnetic valve can be opened after the newly-entering air is dried, and the air path returns to the circulating drying state.
Furthermore, the pressure of the pulse gas is regulated by the first pressure control valve or the second pressure control valve, and the gas circuit provides two paths of adjustable pulse gas for measurement.
The invention has the following beneficial effects:
the gas pulse generator has the advantages of simple structure, ingenious design, good drying effect and dry pulse gas generation function. When the circulation drying is carried out, the measuring chamber is communicated with the air dryer, the air pump and the air tank to form a closed circulation air path, the air pump is started to drive the drying air path to circulate, the moisture of the circulated air is repeatedly removed through the air dryer, compared with the drying process by adding a drying agent into the measuring chamber, the drying operation of the circulation air path is simple and convenient, the drying agent does not need to be replaced by disassembling and assembling the complicated measuring chamber, and only the sample of the air dryer needs to be replaced; the gas in the whole system is always in a circulating state, and the gas temperature is consistent.
In the pulse gas generation link, the generated pulse gas temperature is consistent with the temperature of the measuring chamber, and the influence of the temperature difference of the pulse gas on the sample in the measuring chamber is eliminated. When pulse gas collection is carried out, the gas pump pumps gas in the low-pressure region to gas in the high-pressure region, the measuring chamber is in a two-end cut-off state, and the gas pressure cannot be changed, so that a sample in the measuring chamber cannot be interfered in the pulse gas collection stage. Furthermore, the pressure of the pulse gas can be adjusted by a pressure control valve, and the gas circuit provides two paths of drying pulse gas with adjustable pressure for measurement.
Drawings
Fig. 1 is a partial schematic view of a cyclic pulse drying gas circuit.
Fig. 2 is a schematic structural diagram of the present invention.
In the figure: 1 air tank, 2 air pumps, 3 air dryer, 4 one-way valves, 5 three-way solenoid valves, 6 pressure control valves, 7 one-way valves, 8 pressure control valves, 9 one-way valves, 10 two-way solenoid valves, 11 two-way solenoid valves, 12 measuring chambers, 13 two-way solenoid valves, 14 two-way solenoid valves and 15 two-way solenoid valves.
Detailed Description
For a further understanding of the invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
As shown in fig. 1, a dry pulse gas generation gas path includes a gas tank 1, a gas pump 2, an air dryer 3, a check valve 4, i.e., a first check valve, a three-way solenoid valve 5, a pressure control valve 6, i.e., a first pressure control valve, a check valve 7, i.e., a second check valve, a pressure control valve 8, i.e., a second pressure control valve, a check valve 9, i.e., a three-way check valve, a two-way solenoid valve 10, i.e., a first two-way solenoid valve, a two-way solenoid valve 11, i.e., a second two-way solenoid valve, a measurement chamber 12, a two-way solenoid valve 13, i.e., a third two-way solenoid valve, a two-way solenoid valve 14, i.e., a fourth two-way solenoid valve, a two-way solenoid valve 15, i.e., a fifth two-way solenoid valve.
The gas path is generally divided into a normal pressure area, a low pressure area and a high pressure area; the normal pressure area is from the measuring chamber 12 to the adjacent two-way electromagnetic valve 10, two-way electromagnetic valve 11 and two-way electromagnetic valve 13; the low-pressure area is from the air pump 2 through the air tank 1, and ends at the two-way electromagnetic valve 13 and the two-way electromagnetic valve 15; the high-pressure area is formed by a two-way electromagnetic valve 10, a two-way electromagnetic valve 11 and a two-way electromagnetic valve 14 from an air pump 2 through an air dryer 3, a one-way valve 4, a three-way electromagnetic valve 5, a pressure control valve 6, a one-way valve 7, a pressure control valve 8 and a one-way valve 9.
The gas generating unit mainly provides dry atmosphere and pulse pressure gas, the two functions are not interfered with each other, and the working process does not influence the testing environment.
Dry gas generation function:
the air pump 2 works, the air in the closed air path starts to circulate, and the air is adsorbed by the air drier 3 to keep the environment of the measuring chamber dry.
The pulse pressure gas generation function is divided into three steps, as shown in the attached figure 2:
the step 1 of generating the pulse pressure gas is that high pressure gas is generated, gas in a low pressure area is continuously pumped into a high pressure area, and the high pressure area is pressurized to reach higher pressure.
The pulse pressure gas generation step 2 is pulse gas purging, the control electromagnetic valve 10 is opened, and the high-pressure area gas purges the measuring chamber 12.
The pulse pressure gas generation step 3 is gas discharge, and gas in a high-pressure area is discharged to a low-pressure area by bypassing through a two-way solenoid valve 14.
The dry pulse gas generation gas circuit replaces the application of a single pulse gas generation device and a drying agent in a measuring chamber.
The cyclic pulse drying function is further explained with reference to fig. 1
The circulating pulse drying gas path comprises a gas tank 1, a gas pump 2, an air dryer 3, a one-way valve 4, a three-way electromagnetic valve 11, a measuring chamber 12 and a two-way electromagnetic valve 13 in figure 1. When the measuring chamber is dried, the two-way electromagnetic valve 11 and the two-way electromagnetic valve 13 are in a connection state, the air pump 2 works to drive the whole air system to carry out circulating drying, and the air drying is completed through the air dryer 3. The air pump now functions as an air circulation, and during the air circulation the air dryer 3 absorbs air moisture to achieve a drying effect.
The pulse gas collection function is further explained with reference to fig. 1 and 2.
Before pulse gas collection is carried out, the two-way electromagnetic valve 10 is opened, the three-way electromagnetic valve 5 switches channels, and residual pulse gas in a high-pressure area can be circularly dried through the air pump 2, so that the gas before next pulse gas collection is in a dry state. Further, when pulse gas collection is carried out, the two-way electromagnetic valve 11, the two-way electromagnetic valve 13, the two-way electromagnetic valve 14 and the two-way electromagnetic valve 15 are closed, the three-way electromagnetic valve 5 is gated to a gas end needing pulse, at the moment, the gas pump 2 pumps gas in a low-pressure area to gas in a high-pressure area, and the gas pressure of the measuring chamber 12 in a two-end cut-off state cannot be changed, so that a sample of the measuring chamber cannot be interfered in a pulse gas collection stage, and the condition that the measuring chamber generates condensed water due to severe influence on the gas pressure of the measuring chamber is avoided; meanwhile, the condition that a large amount of external wet gas is rushed in due to incomplete sealing of the measuring chamber structure when the pressure of the measuring chamber is reduced is avoided to a certain extent. Further, the pressure of the pulse gas can be adjusted through the pressure control valve 6 or the pressure control valve 8, and the gas circuit provides two paths of adjustable pulse gas for measurement. When pulse gas is needed, the pulse gas with the needed pressure can be obtained by controlling the on-off of the two-way electromagnetic valve 10 for detection. Further, after the pulse air is blown, the two-way electromagnetic valve 14 and the two-way electromagnetic valve 15 can be opened to release pressure, the two-way electromagnetic valve 15 is closed after the pressure release is finished, the air path is in a circulating drying state, the two-way electromagnetic valve 11, the two-way electromagnetic valve 13 and the two-way electromagnetic valve 14 are opened after the newly-entered air is dried, the air path returns to the circulating drying state, and the air pump 2 is selected to be an air pump which can generate the required pulse air pressure and can keep working for a long time; the volume of the gas tank 1 is matched according to the required pulse gas pressure value and the volume of the high-pressure area, and the volume matching refers to an ideal gas state equation.
Claims (4)
1. A dry pulse gas generation gas path comprises a gas tank (1), a gas pump (2), an air dryer (3), a one-way valve V1 (4), a three-way electromagnetic valve (5), a pressure control valve V1 (6), a one-way valve V2 (7), a pressure control valve V2 (8), a one-way valve V3 (9), a two-way electromagnetic valve V1 (10), a two-way electromagnetic valve V2 (11), a measurement chamber (12), a two-way electromagnetic valve V3 (13), a two-way electromagnetic valve V4 (14) and a two-way electromagnetic valve V5 (15);
the outlet of the air tank (1) is connected with the air inlet of the air pump (2), the air outlet of the air pump (2) is connected with one end of the air dryer (3), the other end of the air dryer (3) is connected with the air inlet of the one-way valve V1 (4), the air outlet of the one-way valve V1 (4) is connected with one end of a two-way electromagnetic valve V2 (11), the other end of the two-way electromagnetic valve V2 (11) is communicated with the measuring chamber (12), one end of the two-way electromagnetic valve V3 (13) is communicated with the measuring chamber (12), the other end of the two-way electromagnetic valve V3 (13) is connected with one end of a two-way electromagnetic valve V5 (15), and the other end of the two-way electromagnetic valve V5 (15) is emptied;
an inlet of a three-way electromagnetic valve (5) is connected to a gas path between the one-way valve V1 (4) and the two-way electromagnetic valve V2 (11), one outlet of the three-way electromagnetic valve (5) is connected with a gas inlet of the one-way valve V2 (7) through a pressure control valve V1 (6), the other outlet of the three-way electromagnetic valve (5) is connected with a gas inlet of the one-way valve V3 (9) through a pressure control valve V2 (8), and a gas outlet of the one-way valve V2 (7) and a gas outlet of the one-way valve V3 (9) are both connected to the measuring chamber (12) through the two-way electromagnetic valve V1 (10);
the gas path between the one-way valve V1 (4) and the two-way electromagnetic valve V2 (11) is also connected with one end of a two-way electromagnetic valve V4 (14), the other end of the two-way electromagnetic valve V4 (14) is connected with one end of a two-way electromagnetic valve V5 (15), and one end of a two-way electromagnetic valve V5 (15) is also connected with the inlet of the gas tank (1);
the two-way electromagnetic valve V1 (10), the two-way electromagnetic valve V2 (11) and the two-way electromagnetic valve V3 (13) which are adjacent to the measuring chamber (12) are normal pressure areas;
the air pump (2) is stopped at a two-way electromagnetic valve V3 (13) and a two-way electromagnetic valve V5 (15) through an air tank (1) to form a low-pressure area;
the air pump (2) is a high-pressure area which is formed by an air dryer (3), a one-way valve V1 (4), a three-way electromagnetic valve (5), a pressure control valve V1 (6), a one-way valve V2 (7), a pressure control valve V2 (8) and a one-way valve V3 (9) and is stopped at a two-way electromagnetic valve V1 (10), a two-way electromagnetic valve V2 (11) and a two-way electromagnetic valve V4 (14);
during circulation drying, the measuring chamber (12) is communicated with the air dryer (3), the air pump (2) and the air tank (1) to form a closed circulation air path, the air pump plays a role in air circulation at the moment, and the air dryer (3) absorbs air moisture to achieve a drying effect in the air circulation process;
when the pulse gas occurs, the gas pump compresses the gas in the low-pressure area to the high-pressure area, the pressure of the pulse gas required by the pressure control valves (6) and (8) is adjusted through the control pressure control valve, and the pulse gas is generated through the switch of the two-way control electromagnetic valve V1 (10) to purge the measuring chamber (12).
2. A dry pulse gas generation circuit according to claim 1, wherein: when the air pump is used for boosting or pulse air is discharged, the two-way electromagnetic valve V2 (11) and the two-way electromagnetic valve V3 (13) are closed, so that the condition that the measuring chamber generates condensed water due to severe influence on the air pressure of the measuring chamber in the two processes is avoided; meanwhile, the condition that a large amount of external wet gas rushes in due to incomplete sealing of the measuring chamber structure when the pressure of the measuring chamber is reduced is avoided.
3. A dry pulse gas generation method using the gas circuit of claim 1, characterized in that:
before pulse gas collection, the two-way electromagnetic valve V1 (10) is opened, the three-way electromagnetic valve (5) switches channels, and residual pulse gas in a high-pressure area can be circularly dried through the air pump (2), so that the gas before next pulse gas collection is in a dry state;
when pulse gas collection is carried out, the two-way electromagnetic valve V2 (11), the two-way electromagnetic valve V3 (13), the two-way electromagnetic valve V4 (14) and the two-way electromagnetic valve V5 (15) are closed, the three-way electromagnetic valve (5) is used for gating a gas end needing pulse, at the moment, the gas pump (2) pumps gas in a low-pressure area to gas in a high-pressure area, the gas pressure of the measuring chamber (12) is in a cut-off state at two ends and cannot be changed, and therefore a sample in the measuring chamber cannot be interfered in a pulse gas collection stage;
when pulse gas is needed, the pulse gas with the needed pressure can be obtained by controlling the on-off of the two-way electromagnetic valve V1 (10) for detection;
after pulse gas is blown, the two-way electromagnetic valve V4 (14) and the two-way electromagnetic valve V5 (15) can be opened for pressure relief, the two-way electromagnetic valve V5 (15) is closed after pressure relief is finished, a gas path is in a circulating drying state, after newly entered air is dried, the two-way electromagnetic valve V2 (11), the two-way electromagnetic valve V3 (13) and the two-way electromagnetic valve V4 (14) can be opened, and the gas path returns to the circulating drying state.
4. A dry pulse gas generation method according to claim 3, wherein: the pressure of the pulse gas is adjusted by a pressure control valve V1 (6) or a pressure control valve V2 (8), and the gas circuit provides two paths of adjustable pulse gas for measurement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911043147.8A CN110743329B (en) | 2019-10-30 | 2019-10-30 | Dry pulse gas generation gas circuit |
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| CN201911043147.8A CN110743329B (en) | 2019-10-30 | 2019-10-30 | Dry pulse gas generation gas circuit |
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| CN110743329A CN110743329A (en) | 2020-02-04 |
| CN110743329B true CN110743329B (en) | 2021-10-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2912070B1 (en) * | 2007-02-02 | 2010-02-12 | Commissariat Energie Atomique | SYNTHESIS OF NANOPARTICLES BY LASER PYROLYSIS |
| CN101285741B (en) * | 2008-05-20 | 2010-12-01 | 南通君安电子科技发展有限公司 | Channel type explosive /drug checking door |
| CN102478475B (en) * | 2010-11-30 | 2014-04-16 | 中国科学院大连化学物理研究所 | Quartz crystal microbalance analyzing device with self-cleaning internally circulating gas circuit |
| CN104764848A (en) * | 2015-04-22 | 2015-07-08 | 上海华爱色谱分析技术有限公司 | Gas chromatograph for gas analysis in production field |
| CN208270527U (en) * | 2018-05-24 | 2018-12-21 | 海南电网有限责任公司电力科学研究院 | For SF6The gas detection recycling integrated device of equipment |
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