CN105318186A - Self-gas-taking type pneumatic stop valve system applied to liquefied natural gas (LNG) supplying system - Google Patents
Self-gas-taking type pneumatic stop valve system applied to liquefied natural gas (LNG) supplying system Download PDFInfo
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- CN105318186A CN105318186A CN201410378764.4A CN201410378764A CN105318186A CN 105318186 A CN105318186 A CN 105318186A CN 201410378764 A CN201410378764 A CN 201410378764A CN 105318186 A CN105318186 A CN 105318186A
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Abstract
The invention relates to a pipeline valve system, in particular to a self-gas-taking type pneumatic stop valve system applied to a liquefied natural gas (LNG) supplying system. The self-gas-taking type pneumatic stop valve system comprises a self-gas-taking pipeline connected with the liquid phase inlet of an LNG storage tank, a head end valve, a pressure regulator, a tail end valve, an electromagnetic valve and a pneumatic stop valve arranged at the tail end of the self-gas-taking pipeline, wherein the head end valve, the pressure regulator, the tail end valve, the electromagnetic valve and the pneumatic stop valve are sequentially connected to the self-gas-taking pipeline in series. The pneumatic stop valve is arranged at the liquid phase outlet of the LNG storage tank. Evaporation gas in the storage tank is used as a gas source, gas is supplied to the pneumatic stop valve at the liquid phase outlet of the storage tank, and therefore the pneumatic stop valve can normally work without adding an external gas source. The pressure in the storage tank is generally not lower than 6 KG, a pressure regulating valve is additionally arranged on the self-gas-taking pipeline to enable the gas supply pressure of the storage tank to the pneumatic stop valve to be 2-3 KG, work convenience is improved, and dangers are prevented.
Description
Technical field
The present invention relates to a kind of pipeline valve system, particularly relate to a kind of gas type of asking for pneumatic stopping valve system for LNG air supply system.
Background technique
In fuel gas supply system, due to reasons such as gas price rise and mining conditions, a lot of gas user generally abandons at present and uses liquefied petroleum gas (LPG) (LPG), then uses natural gas supply.Due to the restriction of the conditions such as transport, a lot of user can not use pipe natural gas air feed, then uses tank car air feed.Present natural gas tank car is LNG tank car and CNG tank car more commonly.Due to reasons such as dielectric properties.Although LNG and CNG belongs to rock gas, corresponding Gas Pressure Regulating Equipment can not be general.Therefore, if when there is the phenomenon of wherein certain natural air-air source air feed anxiety, be easy to cause stopping production, for user causes economic loss.Wherein general LNG system comprises LNG storage tank, the LNG storage tank pressure regulation output pipeline be connected with LNG storage tank, the LNG tank car pressure regulation output pipeline be arranged in parallel with LNG storage tank pressure regulation output pipeline and be located at the conventional of LNG tank car pressure regulation output pipeline front end and fill pipeline, wherein commonly using and filling pipeline is three, is connected carries out unloading liquid with tank car.Because storage tank is bailout gas, its pneumatic stopping valve air feed needs external gas source, works very inconvenient, and easily causes danger.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiencies in the prior art, provides a kind of raising work convenience, prevents dangerous gas type of the asking for pneumatic stopping valve system for LNG air supply system occurred.
The present invention is achieved by the following technical programs:
A kind of gas type of asking for pneumatic stopping valve system for LNG air supply system, connect the feed channel of asking for of LNG storage tank fluid inlet, be sequentially connected in series and asking for the head end valve in feed channel, pressure governor, end valve, solenoid valve and be provided with the pneumatic stopping valve of feed channel end of asking for, described pneumatic stopping valve is located at LNG storage tank liquid-phase outlet.
The invention has the beneficial effects as follows:
Using the evaporation vapour in storage tank as source of the gas, be the pneumatic stopping valve air feed of storage tank liquid-phase outlet, normally can work, external gas source need not be increased again.Pressure in storage tank is generally all not less than 6KG, and at an increase pressure regulator valve in feed channel of asking for, the supply gas pressure being pneumatic stopping valve is 2 ~ 3KG, improves work convenience, prevents dangerous generation.
Accompanying drawing explanation
Fig. 1 is main TV structure schematic diagram of the present invention.
In figure: 1. head end valve, 2. pressure governor, 3. end valve, 4. pneumatic stopping valve, 5. solenoid valve, feed channel of 6. asking for.
Embodiment
In order to make those skilled in the art understand technological scheme of the present invention better, below in conjunction with accompanying drawing and most preferred embodiment, the present invention is described in further detail.
As shown in Figure 1, the present invention connects the feed channel 6 of asking for of LNG storage tank fluid inlet, be sequentially connected in series and asking for the head end valve in feed channel, pressure governor, end valve, solenoid valve and be provided with the pneumatic stopping valve of feed channel end of asking for, described pneumatic stopping valve is located at LNG storage tank liquid-phase outlet.
During work, open head end valve 1, in storage tank, gas is by after pressure governor 2 pressure regulation to needs pressure, and open end valve 3, solenoid valve 5, now pneumatic stopping valve 4 gets final product work.In this example, head end valve and end valve are low temperature major axis stop valve, and pressure governor is low temperature pressure reducing regulating valve, and solenoid valve is explosion-proof solenoid valve, and pneumatic stopping valve is low temperature major axis pneumatic stopping valve.
Using the evaporation vapour in storage tank as source of the gas, be the pneumatic stopping valve air feed of storage tank liquid-phase outlet, normally can work, external gas source need not be increased again.Pressure in storage tank is generally all not less than 6KG, and at an increase pressure regulator valve in feed channel of asking for, the supply gas pressure being pneumatic stopping valve is 2 ~ 3KG, improves work convenience, prevents dangerous generation.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (1)
1. gas type of the asking for pneumatic stopping valve system for LNG air supply system, it is characterized in that, connect the feed channel of asking for of LNG storage tank fluid inlet, be sequentially connected in series and asking for the head end valve in feed channel, pressure governor, end valve, solenoid valve and be provided with the pneumatic stopping valve of feed channel end of asking for, described pneumatic stopping valve is located at LNG storage tank liquid-phase outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410378764.4A CN105318186A (en) | 2014-07-31 | 2014-07-31 | Self-gas-taking type pneumatic stop valve system applied to liquefied natural gas (LNG) supplying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410378764.4A CN105318186A (en) | 2014-07-31 | 2014-07-31 | Self-gas-taking type pneumatic stop valve system applied to liquefied natural gas (LNG) supplying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105318186A true CN105318186A (en) | 2016-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410378764.4A Pending CN105318186A (en) | 2014-07-31 | 2014-07-31 | Self-gas-taking type pneumatic stop valve system applied to liquefied natural gas (LNG) supplying system |
Country Status (1)
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| CN (1) | CN105318186A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114738671A (en) * | 2022-03-15 | 2022-07-12 | 山东铠和机电设备有限公司 | Device for supplying gas to mobile equipment |
-
2014
- 2014-07-31 CN CN201410378764.4A patent/CN105318186A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114738671A (en) * | 2022-03-15 | 2022-07-12 | 山东铠和机电设备有限公司 | Device for supplying gas to mobile equipment |
| CN114738671B (en) * | 2022-03-15 | 2024-06-07 | 山东铠和机电设备有限公司 | Device for supplying air to mobile equipment |
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Legal Events
| Date | Code | Title | Description |
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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: 20160210 |