CN203442489U - Liquefied natural gas sampling system with one-way valve - Google Patents
Liquefied natural gas sampling system with one-way valve Download PDFInfo
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- CN203442489U CN203442489U CN201320550304.6U CN201320550304U CN203442489U CN 203442489 U CN203442489 U CN 203442489U CN 201320550304 U CN201320550304 U CN 201320550304U CN 203442489 U CN203442489 U CN 203442489U
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Abstract
The utility model relates to a liquefied natural gas sampling system with a one-way valve. The liquefied natural gas sampling system comprises an inlet cryogenic stop valve, a heat tracing pressure regulating valve, a bypass valve, a pressure meter, a sampled steel bottle and an outlet stop valve, and is characterized in that one end of the inlet cryogenic stop valve is connected with sampled gas, 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 bypass valve and a gas inlet of the sampled steel bottle, the pressure meter is located between the heat tracing pressure regulating valve and the bypass valve, the other end of the bypass valve is connected with the outlet stop valve, and a gas outlet of the sampled steel bottle is connected with the outlet stop valve. The liquefied natural gas sampling system further comprises the one-way valve, and the one-way valve is connected between the gas outlet of the sampled steel bottle and the gas outlet of the heat tracing pressure regulating valve, comprises a valve body and a one-way assembly, and is used for preventing gas impacting. The liquefied natural gas sampling system has the advantages of being good in performance, high in safe reliability, good in stability and long in service life.
Description
Technical field
The utility model relates to a kind of LNG Liquefied natural gas sampling system, is specifically related to that a kind of performance is good, the high LNG Liquefied natural gas sampling system with one-way valve of safety reliability.
Background technique
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, LNG Liquefied natural gas component analysis result is the key parameter of LNG Liquefied natural gas 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 LNG Liquefied natural gas and LNG Trade, so obtain representational sample in lng production and trade, it is one very crucial in lng production and trade.Because the temperature of LNG Liquefied natural gas very easily gasifies, the conversion of any temperature and pressure all very easily causes the Quick Fraction gasification of LNG Liquefied natural gas component, obtain and can truly represent that the mobile LNG Liquefied natural gas 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 LNG Liquefied natural gas 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 LNG Liquefied natural gas, 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 LNG Liquefied natural gas sampling system of prior art is a kind of sampling system of steel cylinder device; realized the sampling to LNG Liquefied natural gas situation; but suddenly heat up; and when steel cylinder outlet valve cuts out; can cause air-flow hammering steel cylinder valve downstream as shock wave; thereby make steel cylinder valve downstream equal work when oppositely installing; the impact of pneumatic hammer to steel cylinder valve downstream; produce dangerous impact, so the LNG Liquefied natural gas sampling system of prior art still exists the place promoting in sampling safety protection.
Model utility content
The purpose of this utility model is to provide a kind of LNG Liquefied natural gas sampling system with one-way valve, to solve existing sampling system, has the technical problem in safety protection.
For achieving the above object, the utility model provides a kind of LNG Liquefied natural gas sampling system with one-way valve, comprise: entrance deep cooling stop valve, accompany hot pressure regulator valve, pay line valve, pressure gauge, 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, pressure gauge 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, and the air outlet of sampling steel cylinder is connected with outlet shutoff valve, also comprises an one-way valve, and described one-way valve is connected between the air outlet and the hot pressure regulator valve of described companion air outlet of described sampling steel cylinder; Described one-way valve comprises: a valve body and an one way component, and described valve body is that two ends have outside thread, centre is hexagonal hollow cylinder; Described one way component is assemblied in described valve inner, and described one way component comprises suction port screw, inserting member, unidirectional O type circle, lifting head, spring and air outlet screw; Described suction port screw, inserting member, unidirectional O type circle, lifting head, spring are sequentially connected with air outlet screw.
The LNG Liquefied natural gas sampling system with one-way valve described in the utility model preferred embodiment, described valve body is that brass is made.
The LNG Liquefied natural gas sampling system with one-way valve described in the utility model preferred embodiment, also comprises a safety valve, and described safety valve is connected between described outlet shutoff valve and the hot pressure regulator valve of described companion; Described safety valve comprises: a Safety valve body, a safety valve cap, a safety valve cap, a safety valve spring and a safety valve valve rod assembly, and described Safety valve body is a three way valve; Described safety valve cap is that two ends have outside thread, and centre is hexagonal hollow cylinder, and one end of described safety valve cap and described Safety valve body are spirally connected, and the other end of described safety valve cap and described safety valve cap are spirally connected; Described safety valve spring and safety valve valve rod assembly are assemblied in the middle of the assembly parts of described Safety valve body, safety valve cap and safety valve cap.
The LNG Liquefied natural gas sampling system with one-way valve described in the utility model preferred embodiment, described Safety valve body, safety valve cap and safety valve cap are that stainless steel is made.
The utility model improves existing LNG Liquefied natural gas sampling system, therefore, compared with prior art, the utlity model has that performance is good, safety 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 one-way 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 electric 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 LNG Liquefied natural gas sampling system, comprise: entrance deep cooling stop valve 10, accompany hot pressure regulator valve 13, pay line valve 9, pressure gauge 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, pressure gauge 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 air 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, pressure gauge 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 air 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 air 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 knock out drum 16, because mode of heating is not linear temperature increase, so when closing the air outlet valve 102 of sampling steel cylinder 1, system pressure can rise sharply than in the past, and the setting of knock out drum 16 can avoid pressure gauge 6 be subject to the rising sharply destruction of pressure to shorten the life-span.Described knock out drum 16 is a sealed shell of tank, and one end of described knock out drum 16 is connected with described pressure gauge 6, and the other end of described knock out drum 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 knock out drum 16 is 75ML, and we also can select the knock out drum 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 ambient 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 rupture disk 1503, and described body 1501 is a three-way 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 rupture disk 1503; One end of described rupture disk 1503 has outside thread, can screw in and connect described body 1501, and the other end of described rupture disk 1503 is the lamellar body with vent, and vent prevents sampling steel cylinder 1 overvoltage by the air release in sampling steel cylinder 1 to atmosphere; Described rupture disk 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 effect.Rupture disk 1503 is welded on one and screws in to the parts in body 1501 and seal with an elastomer O type circle, can change easily rupture disk 1503 and not need valve to disassemble from sampling steel cylinder 1.For convenient locking and dismounting, one end that described rupture disk 1503 has the lamellar body of vent 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 one-way valve; In order to guarantee suddenly to heat up, and when the air 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 an one-way valve 17, and described one-way valve 17 is connected between the air outlet valve 102 and the hot pressure regulator valve of described companion 13 air outlets of described sampling steel cylinder 1; One-way 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 one-way valve 17 comprises: valve body 1701 and one way component, and described valve body 1701 is that two ends have outside 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 suction port screw 1702, inserting member 1703, unidirectional O type circle 1704, lifting head 1705, spring 1706 and air outlet screw 1707; Described suction port screw 1702, inserting member 1703, unidirectional O type circle 1704, lifting head 1705, spring 1706 and air outlet screw 1707 are sequentially connected in described valve body 1701 inside.When air-flow is come in from suction port, promote lifting head 1705 pressuring springs 1706, gas can be flowed out from air outlet; Otherwise, when air-flow is come in from air outlet, cannot promote lifting head 1705, the sealing effect of unidirectional O type circle 1704 cannot flow out from suction port 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 three way valve, three port connection safety valve cap 1202, import and outlets respectively; Described safety valve cap 1202 is that two ends have outside 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 assembly parts 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 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 electric 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 temp 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: temp controller 11 and electric heating pressure regulator valve, described temp controller 11 and described electric heating pressure regulator valve to be to be threaded, the temperature range that described temp controller 11 is controlled at 23 degree to 193 degree; Described electric 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 liquid 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 crossover sub and outside 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 LNG Liquefied natural gas sampling system, therefore, compared with prior art, the utlity model has that performance is good, safety 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 LNG Liquefied natural gas sampling system with one-way valve, comprise: entrance deep cooling stop valve, accompany hot pressure regulator valve, pay line valve, pressure gauge, 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, pressure gauge 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, and the air outlet of sampling steel cylinder is connected with outlet shutoff valve, it is characterized in that, also comprises an one-way valve, and described one-way valve is connected between the air outlet and the hot pressure regulator valve of described companion air outlet of described sampling steel cylinder;
Described one-way valve comprises: a valve body and an one way component,
Described valve body is that two ends have outside thread, and centre is hexagonal hollow cylinder; Described one way component is assemblied in described valve inner, and described one way component comprises suction port screw, inserting member, unidirectional O type circle, lifting head, spring and air outlet screw;
Described suction port screw, inserting member, unidirectional O type circle, lifting head, spring are sequentially connected with air outlet screw.
2. the LNG Liquefied natural gas sampling system with one-way valve as claimed in claim 1, is characterized in that, described valve body is that brass is made.
3. the LNG Liquefied natural gas sampling system with one-way valve as claimed in claim 2, is characterized in that, also comprises a safety valve, and described safety valve is connected between described outlet shutoff valve and the hot pressure regulator valve of described companion;
Described safety valve comprises: a Safety valve body, a safety valve cap, a safety valve cap, a safety valve spring and a safety valve valve rod assembly,
Described Safety valve body is a three way valve;
Described safety valve cap is that two ends have outside thread, and centre is hexagonal hollow cylinder, and one end of described safety valve cap and described Safety valve body are spirally connected, and the other end of described safety valve cap and described safety valve cap are spirally connected;
Described safety valve spring and safety valve valve rod assembly are assemblied in the middle of the assembly parts of described Safety valve body, safety valve cap and safety valve cap.
4. the LNG Liquefied natural gas sampling system with one-way valve as claimed in claim 3, is characterized in that, described Safety valve body, safety valve cap and safety valve cap are that stainless steel is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320550304.6U CN203442489U (en) | 2013-09-05 | 2013-09-05 | Liquefied natural gas sampling system with one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320550304.6U CN203442489U (en) | 2013-09-05 | 2013-09-05 | Liquefied natural gas sampling system with one-way valve |
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| Publication Number | Publication Date |
|---|---|
| CN203442489U true CN203442489U (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320550304.6U Expired - Fee Related CN203442489U (en) | 2013-09-05 | 2013-09-05 | Liquefied natural gas sampling system with one-way valve |
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|---|---|
| CN (1) | CN203442489U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812700A (en) * | 2019-03-22 | 2019-05-28 | 石宏扬 | A kind of natural gas line sampling valve |
| CN114877260A (en) * | 2022-04-13 | 2022-08-09 | 中海石油气电集团有限责任公司 | High compact LNG sample gasification equipment with self-adaptation function |
-
2013
- 2013-09-05 CN CN201320550304.6U patent/CN203442489U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812700A (en) * | 2019-03-22 | 2019-05-28 | 石宏扬 | A kind of natural gas line sampling valve |
| CN109812700B (en) * | 2019-03-22 | 2021-02-19 | 杨天舒 | Natural gas line sampling valve |
| CN114877260A (en) * | 2022-04-13 | 2022-08-09 | 中海石油气电集团有限责任公司 | High compact LNG sample gasification equipment with self-adaptation function |
| CN114877260B (en) * | 2022-04-13 | 2024-03-08 | 中海石油气电集团有限责任公司 | High compact LNG sampling gasification device with self-adaptation function |
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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 |