CN203443817U - Liquefied natural gas sampling system with buffer tank - Google Patents
Liquefied natural gas sampling system with buffer tank Download PDFInfo
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- CN203443817U CN203443817U CN201320550383.0U CN201320550383U CN203443817U CN 203443817 U CN203443817 U CN 203443817U CN 201320550383 U CN201320550383 U CN 201320550383U CN 203443817 U CN203443817 U CN 203443817U
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- liquefied natural
- surge tank
- natural gas
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Abstract
The utility model relates to a liquefied natural gas sampling system with a buffer tank. The liquefied natural gas sampling system comprises an inlet cryogenic stop valve, a heat tracing pressure regulating valve, a side line valve, a pressure gauge, a sampling steel bottle and an outlet stop valve, wherein one end of the inlet cryogenic stop valve is connected with a sampling gas, and the other end of the inlet cryogenic stop valve is connected with the heat tracing pressure regulating valve; the other end of the heat tracing pressure regulating valve is connected with the side line valve and a gas inlet valve of the sampling steel bottle, and the pressure gauge is positioned between the heat tracing pressure regulating valve and the side line valve; the other end of the side line valve is connected with the outlet stop valve and a gas outlet valve of the sampling steel bottle is also connected with the outlet stop valve. The liquefied natural gas sampling system further comprises the buffer tank which is a sealed tank body, one end of the buffer tank is connected with the pressure gauge, and the other end of the buffer tank is connected to a connecting pipeline between the side line valve and the gas inlet valve of the sampling steel bottle. The liquefied natural gas sampling system has the advantages of good performance, high safety and reliability, excellent stability and long service life.
Description
Technical field
The utility model relates to a kind of liquefied natural gas (LNG) sampling system, is specifically related to that a kind of performance is good, the high liquefied natural gas (LNG) sampling system with surge tank of safe reliability.
Background technology
Along with the growing interest of people to environmental problem, more and more stricter to liquid, gas purging, content rules in world wide, and will soon carry out new high standard.In the situation that high standard requires, by legal test loop, measure liquid, gas purging, it is very important that the concentration of content or content just become, and in this whole process, the efficiency of sampling system is very crucial, liquefied natural gas (LNG) component analysis result is the key parameter of liquefied natural gas (LNG) density and unit calorific value, analysis result whether accurate directly affects concrete quantity and the quality judging of handing-over metering in the quality of production of liquefied natural gas (LNG) and LNG Trade, so obtain representational sample in liquefied natural gas (LNG) production and trade, it is one very crucial in liquefied natural gas (LNG) production and trade.Because the temperature of liquefied natural gas (LNG) very easily gasifies, the conversion of any temperature and pressure all very easily causes the Quick Fraction gasification of liquefied natural gas (LNG) component, obtain and can truly represent that the mobile liquefied natural gas (LNG) sample (being that liquid blending ingredients compares with gas blending ingredients than consistent) of liquid mixture ratio in pipeline just exists very large difficulty, so liquefied natural gas (LNG) must keep supercooled state before gasification, must not there is the fractionation gasification of any component to occur.All having there is variation at temperature and pressure after electric heater gasification in liquefied natural gas (LNG), is also subject to the impact of external environment condition simultaneously, along with more and more higher to the requirement of environmental protection and safety, so the security stability of whole system is had higher requirement.The liquefied natural gas (LNG) sampling system of prior art is a kind of sampling system of steel cylinder device; realized the sampling to liquefied natural gas (LNG) situation; but because type of heating is not linear temperature increase; so when closing steel cylinder outlet valve; system pressure can rise sharply than in the past, still had the place promoting in sample representation and safeguard protection.
Utility model content
The purpose of this utility model is to provide a kind of liquefied natural gas (LNG) sampling system with surge tank, to solve existing sampling system, has the technical matters in safeguard protection.
For achieving the above object, the utility model provides a kind of liquefied natural gas (LNG) sampling system with surge tank, comprise: entrance deep cooling stop valve, accompany hot pressure regulator valve, pay line valve, tensimeter, sampling steel cylinder and outlet shutoff valve, annexation is wherein: one end of entrance deep cooling stop valve is connected with gas sampled, and the other end of entrance deep cooling stop valve is connected with the hot pressure regulator valve of companion; Accompany the other end of hot pressure regulator valve to be connected with the air intake of paying line valve and sampling steel cylinder, tensimeter is between the hot pressure regulator valve of companion and pair line valve; The other end of paying line valve is connected with outlet shutoff valve, the gas outlet of sampling steel cylinder is connected with outlet shutoff valve, also comprise a surge tank, described surge tank is a sealed shell of tank, one end of described surge tank is connected with described tensimeter, and the other end of described surge tank is connected in the connecting tube of paying between line valve and sampling steel cylinder air intake.
The liquefied natural gas (LNG) sampling system with surge tank described in the utility model preferred embodiment, the volume of described surge tank is 75ML.
The liquefied natural gas (LNG) sampling system with surge tank described in the utility model preferred embodiment, also comprise a pressure relief device, described pressure relief device comprises: a body, an O type circle and a safety diaphragm, described body is a T-valve, described body connects respectively the air intake of described sampling steel cylinder, the hot pressure regulator valve of described companion and described safety diaphragm, one end of described safety diaphragm has external thread, can screw in and connect described body, the other end of described safety diaphragm is the lamellar body with air hole, described safety diaphragm connects after described O type circle, screws in and connects described body.
The liquefied natural gas (LNG) sampling system with surge tank described in the utility model preferred embodiment, one end that described safety diaphragm has the lamellar body of air hole is hexagon.
The utility model improves existing liquefied natural gas (LNG) sampling system, therefore, compared with prior art, the utlity model has that performance is good, safe reliability is high, good stability, and the advantage of long service life.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present utility model;
Fig. 2 is schematic appearance of the present utility model;
Fig. 3 is the schematic diagram of the utility model pressure relief device;
Fig. 4 is the explosive view of the utility model retaining valve;
Fig. 5 is the schematic diagram of the utility model safety valve;
Fig. 6 is the schematic diagram that the utility model is accompanied hot pressure regulator valve;
Fig. 7 is the schematic diagram of the utility model electrical heating pressure regulator valve;
Fig. 8 is the connection diagram of the utility model outage intubate.
Embodiment
Below in conjunction with accompanying drawing, illustrate the utility model.
Please refer to Fig. 1, Fig. 2, a kind of liquefied natural gas (LNG) sampling system, comprise: entrance deep cooling stop valve 10, accompany hot pressure regulator valve 13, pay line valve 9, tensimeter 6, sampling steel cylinder 1 and outlet shutoff valve 7, annexation is wherein: one end of entrance deep cooling stop valve 10 is connected with gas sampled, and the other end of entrance deep cooling stop valve 10 is connected with the hot pressure regulator valve 13 of companion; Accompany the other end of hot pressure regulator valve 13 to be connected with the air intake valve 101 of paying line valve 9 and sampling steel cylinder 1 respectively, tensimeter 6 is between the hot pressure regulator valve 13 of companion and pair line valve 9; The other end of paying line valve 9 is connected with outlet shutoff valve 7, and the gas outlet valve 102 of sampling steel cylinder 1 is connected with outlet shutoff valve 7.
The using method of sampling system is use front confirmation entrance deep cooling stop valve 10, accompany hot pressure regulator valve 13, pair line valve 9 and outlet shutoff valve 7 all to close, and electric heater 1306 heating functions to be opened; Again sampling steel cylinder 1 is connected with system; Then slowly open entrance deep cooling stop valve 10, outlet shutoff valve 7 and pay line valve 9, then slowly open the hot pressure regulator valve 13 of companion, adjust the hot pressure regulator valve 13 of companion, until thermometer 14 readings, reach after desired temperature, tensimeter 6 is without boosting after phenomenon, and order sampling sample circulated about 1 minute in system; Come, close and pay line valve 9, slowly open gas outlet valve 102 and the air intake valve 101 of sampling steel cylinder 1, order sampling sample wash is also full of sampling steel cylinder 1; Next, close the gas outlet valve 102 of sampling steel cylinder 1, after system pressure is constant, close the air intake valve 101 of sampling steel cylinder 1, and close entrance deep cooling stop valve 10, open and pay line valve 9, when system pressure, be down to after normal pressure, close and pay line valve 9; Finally, by sampling steel cylinder 1 end sampling separated with system.
In above-mentioned sampling system, we add a surge tank 16, because type of heating is not linear temperature increase, so when closing the gas outlet valve 102 of sampling steel cylinder 1, system pressure can rise sharply than in the past, and the setting of surge tank 16 can avoid tensimeter 6 be subject to the rising sharply destruction of pressure to shorten the life-span.Described surge tank 16 is a sealed shell of tank, and one end of described surge tank 16 is connected with described tensimeter 6, and the other end of described surge tank 16 is connected in the connecting tube of paying between line valve 9 and sampling steel cylinder 1 air intake valve 101.The volume of described surge tank 16 is 75ML, and we also can select the surge tank 16 of larger volume certainly.
Please also refer to Fig. 3, is the schematic diagram of the utility model pressure relief device; In order to guarantee that the sample in sampling steel cylinder 1 is being elevated in the process of environment temperature, especially summer, can not produce because of volumetric expansion the high pressure that cannot estimate, we have increased a pressure relief device 15, and pressure relief device 15 can be by preventing sampling steel cylinder 1 overvoltage the air release in sampling steel cylinder 1 to atmosphere.Described pressure relief device 15 comprises: body 1501, O type circle 1502 and safety diaphragm 1503, and described body 1501 is a T-valve, described body 1501 connects respectively the air intake of described sampling steel cylinder 1, the hot pressure regulator valve 13 of described companion and described safety diaphragm 1503; One end of described safety diaphragm 1503 has external thread, can screw in and connect described body 1501, and the other end of described safety diaphragm 1503 is the lamellar body with air hole, and air hole prevents sampling steel cylinder 1 overvoltage by the air release in sampling steel cylinder 1 to atmosphere; Described safety diaphragm 1503 connects after described O type circle 1502, screws in and connects described body 1501, and elastomeric O type circle is used for reaching sealing effectiveness.Safety diaphragm 1503 is welded on one and screws in to the parts in body 1501 and seal with an elastic body O type circle, can change easily safety diaphragm 1503 and not need valve to disassemble from sampling steel cylinder 1.For convenient locking and dismounting, one end that described safety diaphragm 1503 has the lamellar body of air hole is designed to hexagon, is convenient to the application of force.
Please also refer to Fig. 4, is the explosive view of the utility model retaining valve; In order to guarantee suddenly to heat up, and when the gas outlet of sampling steel cylinder 1 valve 102 cuts out, can not cause air-flow hammering sampling steel cylinder 1 valve downstream as shock wave, we have designed a retaining valve 17, and described retaining valve 17 is connected between the gas outlet valve 102 and the hot pressure regulator valve of described companion 13 gas outlets of described sampling steel cylinder 1; Retaining valve 17 has limited the flow direction of air-flow, has stoped the impact of pneumatic hammer to sampling steel cylinder 1 valve downstream; Described retaining valve 17 comprises: valve body 1701 and one way component, and described valve body 1701 is that two ends have external thread, centre is hexagonal hollow cylinder, uses brass to make; Described one way component is assemblied in described valve body 1701 inside, and described one way component comprises air intake opening screw 1702, insert 1703, unidirectional O type circle 1704, lifting head 1705, spring 1706 and gas outlet screw 1707; Described air intake opening screw 1702, insert 1703, unidirectional O type circle 1704, lifting head 1705, spring 1706 and gas outlet screw 1707 are sequentially connected in described valve body 1701 inside.When air-flow is come in from air intake opening, promote lifting head 1705 pressuring springs 1706, gas can be flowed out from gas outlet; Otherwise, when air-flow is come in from gas outlet, cannot promote lifting head 1705, the sealing effectiveness of unidirectional O type circle 1704 cannot flow out from air intake opening gas, has limited the flow direction of gas, and has stoped the impact of pneumatic hammer to sampling steel cylinder 1 valve downstream.
Please also refer to Fig. 5, is the schematic diagram of the utility model safety valve; For stablizing of internal system pressure, we have designed a safety valve 12, and described safety valve 12 is connected between described outlet shutoff valve 7 and the hot pressure regulator valve 13 of described companion; Described safety valve 12 comprises: safety valve body 1201, safety valve cap 1202, safety valve cap 1203, safety valve spring 1204 and safety valve valve rod assembly 1205, described safety valve body 1201 is triple-valve body, three port connection safety valve cap 1202, import and outlets respectively; Described safety valve cap 1202 is that two ends have external thread, and centre is hexagonal hollow cylinder, and one end of described safety valve cap 1202 and described safety valve body 1201 are spirally connected, and the other end of described safety valve cap 1202 and described safety valve cap 1203 are spirally connected; Described safety valve spring 1204 and safety valve valve rod assembly 1205 are assemblied in the middle of the subassembly of described safety valve body 1201, safety valve cap 1202 and safety valve cap 1203, when system pressure is greater than the expansionary force of safety valve spring 1204,1205 compressing safety valve spring 1204 compressions of safety valve valve rod assembly, import and outlet conducting, system pressure is releived, otherwise, when system pressure is less than the expansionary force of safety valve spring 1204, safety valve valve rod assembly 1205 is oppressed by safety valve spring 1204, import and export not conducting.Consider the pressure load-bearing capacity of safety valve 12, safety valve body described in the present embodiment 1201, safety valve cap 1202 and safety valve cap 1203 are used stainless steel to make, but can not be used for limiting this patent.
Please also refer to Fig. 6 and Fig. 7, the utility model is accompanied the schematic diagram of hot pressure regulator valve 13 and electrical heating pressure regulator valve; For the stable and adjustability of internal system temperature, we have designed a hot pressure regulator valve 13 of companion that has temperature controller 11; This pressure regulator valve can be used to vapourised liquid sample or preheating gas sample to prevent sample condensation; This companion is hot, and pressure regulator valve 13 comprises: temperature controller 11 and electrical heating pressure regulator valve, described temperature controller 11 and described electrical heating pressure regulator valve to be to be threaded, the temperature range that described temperature controller 11 is controlled at 23 degree to 193 degree; Described electrical heating pressure regulator valve comprises: pressure regulation valve body 1301, pressure regulation valve rod 1302, range spring 1303, pressure regulation check plate 1304, pressure regulation poppe tvalve core assembly 1305 and electric heater 1306, described pressure regulation valve rod 1302, range spring 1303, pressure regulation check plate 1304, pressure regulation poppe tvalve core assembly 1305 and electric heater 1306 are sequentially assemblied in described pressure regulation valve body 1301.
In addition, described electric heater 1306 is connected with sampling pipe, and such design directly contacts electric heater 1306 with sampling sample, can obtain the maximum thermal efficiency, and easily pull down and clean.
Please also refer to Fig. 8, the connection diagram of the utility model outage intubate; For stablizing of sampling steel cylinder 1 internal pressure, we have designed an outage intubate 18; This outage intubate 18 provides a volume required evaporating space in the sampling steel cylinder 1 that contains liquefied gas, make when temperature raises, liquid in sampling steel cylinder 1 is inflatable, while preventing gas expansion, build-up of pressure rises, the length of outage intubate 18 determines the size of evaporating space, the outage intubate 18 that therefore can assemble as required different length; One end of described outage intubate 18 is X-over and external thread, and one end is pipe in addition; The described screw thread port that screws into sampling steel cylinder 1, described pipe inserts in described sampling steel cylinder 1, and the pipe of described outage intubate 18 adopts the clean stainless steel of EP level to make, and prevents from sampling sample contamination, whole layout compactness attractive in appearance.
The utility model improves existing liquefied natural gas (LNG) sampling system, therefore, compared with prior art, the utlity model has that performance is good, safe reliability is high, good stability, and the advantage of long service life.
Disclosed is above only several specific embodiment of the present utility model, but the utility model is not limited thereto, and the changes that any person skilled in the art can think of, all should drop in protection domain of the present utility model.
Claims (4)
1. a liquefied natural gas (LNG) sampling system with surge tank, comprise: entrance deep cooling stop valve, accompany hot pressure regulator valve, pay line valve, tensimeter, sampling steel cylinder and outlet shutoff valve, annexation is wherein: one end of entrance deep cooling stop valve is connected with gas sampled, and the other end of entrance deep cooling stop valve is connected with the hot pressure regulator valve of companion; Accompany the other end of hot pressure regulator valve to be connected with the air intake of paying line valve and sampling steel cylinder, tensimeter is between the hot pressure regulator valve of companion and pair line valve; The other end of paying line valve is connected with outlet shutoff valve, the gas outlet of sampling steel cylinder is connected with outlet shutoff valve, it is characterized in that, also comprise a surge tank, described surge tank is a sealed shell of tank, one end of described surge tank is connected with described tensimeter, and the other end of described surge tank is connected in the connecting tube of paying between line valve and sampling steel cylinder air intake.
2. the liquefied natural gas (LNG) sampling system with surge tank as claimed in claim 1, is characterized in that, the volume of described surge tank is 75ML.
3. the liquefied natural gas (LNG) sampling system with surge tank as claimed in claim 2, is characterized in that, also comprise a pressure relief device, described pressure relief device comprises: a body, an O type circle and a safety diaphragm,
Described body is a T-valve, and described body connects respectively the air intake of described sampling steel cylinder, the hot pressure regulator valve of described companion and described safety diaphragm,
One end of described safety diaphragm has external thread, can screw in and connect described body, and the other end of described safety diaphragm is the lamellar body with air hole,
Described safety diaphragm connects after described O type circle, screws in and connects described body.
4. the liquefied natural gas (LNG) sampling system with surge tank as claimed in claim 3, is characterized in that,
One end that described safety diaphragm has the lamellar body of air hole is hexagon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320550383.0U CN203443817U (en) | 2013-09-05 | 2013-09-05 | Liquefied natural gas sampling system with buffer tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320550383.0U CN203443817U (en) | 2013-09-05 | 2013-09-05 | Liquefied natural gas sampling system with buffer tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203443817U true CN203443817U (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320550383.0U Expired - Fee Related CN203443817U (en) | 2013-09-05 | 2013-09-05 | Liquefied natural gas sampling system with buffer tank |
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| CN (1) | CN203443817U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043814A (en) * | 2015-07-01 | 2015-11-11 | 阿拉山口出入境检验检疫局综合技术服务中心 | Mixing device of sampled sample of liquefied petroleum gas |
| CN107314919A (en) * | 2017-07-18 | 2017-11-03 | 贵州大学 | A kind of sampling sampling and testing device for shale gas exploitation |
| CN107632099A (en) * | 2017-08-31 | 2018-01-26 | 天津市鹏翔科技有限公司 | A kind of intelligent online continuous sampling automatic analysis system and method |
-
2013
- 2013-09-05 CN CN201320550383.0U patent/CN203443817U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043814A (en) * | 2015-07-01 | 2015-11-11 | 阿拉山口出入境检验检疫局综合技术服务中心 | Mixing device of sampled sample of liquefied petroleum gas |
| CN105043814B (en) * | 2015-07-01 | 2017-11-28 | 阿拉山口出入境检验检疫局综合技术服务中心 | A kind of liquefied petroleum gas samples sample mix device |
| CN107314919A (en) * | 2017-07-18 | 2017-11-03 | 贵州大学 | A kind of sampling sampling and testing device for shale gas exploitation |
| CN107632099A (en) * | 2017-08-31 | 2018-01-26 | 天津市鹏翔科技有限公司 | A kind of intelligent online continuous sampling automatic analysis system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 Termination date: 20140905 |
|
| EXPY | Termination of patent right or utility model |