CN104728602A - LNG dispenser with automatic return air metering function - Google Patents
LNG dispenser with automatic return air metering function Download PDFInfo
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- CN104728602A CN104728602A CN201310718867.6A CN201310718867A CN104728602A CN 104728602 A CN104728602 A CN 104728602A CN 201310718867 A CN201310718867 A CN 201310718867A CN 104728602 A CN104728602 A CN 104728602A
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- air
- pressure
- pneumatic cut
- stop valve
- valve
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Abstract
The invention discloses an LNG dispenser with an automatic return air metering function. The LNG dispenser comprises a first pressure transmitter, a pressure gauge, a first pneumatic cut-off stop valve, a first check valve, a first thermal mass flow meter, a first stop valve, a second pneumatic cut-off stop valve, a second pressure transmitter, a second check valve, a second thermal mass flow meter, a second stop valve, a third pneumatic cut-off stop valve, a fourth check valve and a control system, wherein the first pressure transmitter, the pressure gauge, the first pneumatic cut-off stop valve, the first check valve, the first thermal mass flow meter and the first stop valve are sequentially arranged on a gas filler gun pipeline; the first pneumatic cut-off stop valve and the first check valve are connected with each other in parallel; the second pneumatic cut-off stop valve, the second pressure transmitter, the second check valve, the second thermal mass flow meter and the second stop valve are sequentially arranged on a return-air gun pipeline; the fourth check valve and the control system are arranged on a gas filler gun reflux inlet pipeline. The pressure transmitters, the pneumatic cut-off stop valves and the thermal mass flow meters are additionally arranged on the return-air gun pipeline; and simulation of the pressure transmitters or collection of digital signals is realized through the control system, so that the pressure of the gas cylinder is greater than or equal to the preset return air pressure value, the valve is automatically turned on to return air; and when the pressure of the gas cylinder is smaller than the preset return air pressure value, the valve is automatically turned off to stop the air return.
Description
Technical field
The present invention relates to LNG filling machine measurement technique field, be specifically related to a kind of LNG filling machine with automatic air return function of measuring.
Background technique
Along with the degree of industrial automation is more and more higher, working efficiency is also improving fast, and various intelligent sensor is also fast-developing.By processing the information of intelligent sensor, LNG filling machine can more intelligent and facilitation.
Existing LNG filling machine, as shown in Figure 1, its return-air gun barrel road is only provided with No. two safety check, its air-exhaust technology is the pressure gauge being observed gas cylinder by operator, determines whether carry out return-air by operator; Need operator's Real Time Observation cylinder pressure gauge in return-air process, after reaching requirement, manually take off muffler; As in LNG fueling process, storage pressure raises, and needs operator to suspend aerating, manually plugs muffler and carry out return-air, take off muffler after return-air, continues LNG aerating.
Summary of the invention
The present invention is directed to deficiency of the prior art, a kind of LNG filling machine with automatic air return function of measuring is provided.
The present invention is realized by following technological scheme: a kind of LNG filling machine with automatic air return function of measuring, comprises and is located at the pressure transmitter connect on air filling gun pipeline, pressure gauge, a pneumatic cut-out stop valve of parallel join and safety check, insulation mass flowmenter, a stop valve successively;
Be located at the pneumatic cut-out stop valve of No. two of taking back on air gun pipeline, No. two pressure transmitters, No. two safety check, No. two insulations mass flowmenter, No. two stop valves successively;
No. three pneumatic cut-out stop valves, between the pneumatic cut-out stop valve that one end of described No. three pneumatic cut-out stop valves is connected to an insulation mass flowmenter on air filling gun pipeline and parallel join and a safety check, the other end connects between No. two insulation mass flowmenters on return-air gun barrel road and No. two stop valves;
Be located at No. four safety check on air filling gun refluxing opening pipeline, described air filling gun refluxing opening pipeline is connected to No. two safety check on return-air gun barrel road and between No. two insulation mass flowmenters.
Preferred as such scheme, described No. two pressure transmitters are connected by ball valve with between return-air gun barrel road.
The invention has the advantages that: a pressure transmitter, pneumatic cut-out stop valve and insulation mass flowmenter are installed in the present invention additional on the return-air gun barrel road of LNG filling machine, and by the collection of control system to the analog or digital signal of pressure oscillation device, realize automatically opening valve when storage pressure is more than or equal to default back pressure value and carry out return-air; When storage pressure is less than default back pressure value, automatic-closing valve stops the function of return-air.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing LNG filling machine;
Fig. 2 is structural representation of the present invention.
In figure: 1, air filling gun pipeline; 2, return-air gun barrel road; 3, air filling gun refluxing opening pipeline; 4, No. three pneumatic cut-out stop valves; 11, a pressure transmitter; 12, pressure gauge; 13, a safety check; 14, a pneumatic cut-out stop valve; 15, an insulation mass flowmenter; 16, a stop valve; 21, No. two pneumatic cut-out stop valves; 22, No. two pressure transmitters; 23, No. two safety check; 24, No. two insulation mass flowmenters; 25, No. two stop valves; 31, No. four safety check.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
As shown in Figure 1, there is a LNG filling machine for automatic air return function of measuring, comprise and be located at the pressure transmitter connect on air filling gun pipeline, pressure gauge, a pneumatic cut-out stop valve of parallel join and safety check, insulation mass flowmenter, a stop valve successively;
Be located at the pneumatic cut-out stop valve of No. two of taking back on air gun pipeline, No. two pressure transmitters, No. two safety check, No. two insulations mass flowmenter, No. two stop valves successively;
No. three pneumatic cut-out stop valves, between the pneumatic cut-out stop valve that one end of described No. three pneumatic cut-out stop valves is connected to an insulation mass flowmenter on air filling gun pipeline and parallel join and a safety check, the other end connects between No. two insulation mass flowmenters on return-air gun barrel road and No. two stop valves;
Be located at No. four safety check on air filling gun refluxing opening pipeline, described air filling gun refluxing opening pipeline is connected to No. two safety check on return-air gun barrel road and between No. two insulation mass flowmenters.
Wherein, No. two pressure transmitters are connected by ball valve with between return-air gun barrel road.
The foregoing is only and embody the preferred embodiment of the principle of the invention, therefore do not limit protection scope of the present invention, every equalization change done according to the present invention with modify within the scope of the claims of all containing in the present invention.
Claims (2)
1. there is a LNG filling machine for automatic air return function of measuring, it is characterized in that: comprise and be located at the pressure transmitter connect on air filling gun pipeline, pressure gauge, a pneumatic cut-out stop valve of parallel join and safety check, insulation mass flowmenter, a stop valve successively;
Be located at the pneumatic cut-out stop valve of No. two of taking back on air gun pipeline, No. two pressure transmitters, No. two safety check, No. two insulations mass flowmenter, No. two stop valves successively;
No. three pneumatic cut-out stop valves, between the pneumatic cut-out stop valve that one end of described No. three pneumatic cut-out stop valves is connected to an insulation mass flowmenter on air filling gun pipeline and parallel join and a safety check, the other end connects between No. two insulation mass flowmenters on return-air gun barrel road and No. two stop valves;
Be located at No. four safety check on air filling gun refluxing opening pipeline, described air filling gun refluxing opening pipeline is connected to No. two safety check on return-air gun barrel road and between No. two insulation mass flowmenters,
Also comprise the control system of the analog or digital signal for gathering No. two pressure transmitters.
2. there is the LNG filling machine of automatic air return function of measuring as claimed in claim 1, it is characterized in that: described No. two pressure transmitters are connected by ball valve with between return-air gun barrel road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310718867.6A CN104728602A (en) | 2013-12-24 | 2013-12-24 | LNG dispenser with automatic return air metering function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310718867.6A CN104728602A (en) | 2013-12-24 | 2013-12-24 | LNG dispenser with automatic return air metering function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104728602A true CN104728602A (en) | 2015-06-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310718867.6A Pending CN104728602A (en) | 2013-12-24 | 2013-12-24 | LNG dispenser with automatic return air metering function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104728602A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577923A (en) * | 2018-12-03 | 2019-04-05 | 重庆大学 | It is a kind of for measure coal-bed gas exploitation test when reverse irrigation amount device |
-
2013
- 2013-12-24 CN CN201310718867.6A patent/CN104728602A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577923A (en) * | 2018-12-03 | 2019-04-05 | 重庆大学 | It is a kind of for measure coal-bed gas exploitation test when reverse irrigation amount device |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150624 |