CN105571670A - LNG vacuum calibrating device - Google Patents
LNG vacuum calibrating device Download PDFInfo
- Publication number
- CN105571670A CN105571670A CN201610167205.8A CN201610167205A CN105571670A CN 105571670 A CN105571670 A CN 105571670A CN 201610167205 A CN201610167205 A CN 201610167205A CN 105571670 A CN105571670 A CN 105571670A
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- China
- Prior art keywords
- arm
- phase stream
- vacuum
- stream gauge
- lng
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/10—Preventing damage by freezing or excess pressure or insufficient pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/14—Casings, e.g. of special material
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses an LNG vacuum calibrating device. The LNG vacuum calibrating device comprises a shell, an underframe and a vacuum calibrator, wherein the vacuum calibrator comprises a liquid phase flowmeter, a gas phase flowmeter and a vacuum tank; the liquid phase flowmeter and the gas phase flowmeter are mounted in the vacuum tank, a plurality of windows are formed in the outer wall of the vacuum tank, and a liquid phase inlet, a liquid phase outlet, a gas phase inlet and a gas phase outlet are formed in a front panel of the vacuum tank; an inlet and an outlet of the liquid phase flowmeter are respectively communicated with the liquid phase inlet and the liquid phase outlet through pipelines, and an inlet and an outlet of the gas phase flowmeter are respectively communicated with the gas phase inlet and the gas phase outlet through pipelines. The LNG vacuum calibrating device has a thermal insulation function and is relatively high in calibration accuracy and capable of working for a long time without freezing; the gasification of LNG is greatly reduced, the calibration error is reduced, and the trade of LNG is relatively fair.
Description
Technical field
The present invention relates to fluid calibrating installation field, particularly a kind of LNG vacuum calibrating installation.
Background technology
LNG(liquefied natural gas (LNG)) be a kind of clean, the energy efficiently of ultralow temperature, its temperature is-163 DEG C, due to its environment-friendly high-efficiency, is more and more favored, as the preferred fuels of a lot of equipment.
In LNG measurement verification, medium in whole calibrating installation pipeline is LNG, pipeline at present in these calibrating installations, not through any isothermal holding, leaks thermal phenomenon serious, and LNG is easy to gasification, thus LNG produces two-phase flow, make current LNG calibrating installation be easy to be subject to the impact of environment temperature, cause gauging error large, had a strong impact on the calibration accuracy of calibrating installation, also because of the excessive problem generation trade dispute of error, may can not reach the requirement of fair trading.
After a LNG liquid addition machine examined and determine by LNG calibrating installation, current calibrating installation there will be the phenomenon that large area is frozen, and makes LNG calibrating installation cannot continuous firing, affects job schedule.
Summary of the invention
For the deficiency that above-mentioned LNG calibrating installation exists, technical purpose of the present invention be to provide one have heat insulation with heat insulation function, calibration accuracy is higher, can work long hours and non-icing LNG vacuum calibrating installation, this LNG calibrating installation greatly reduces the gasification of LNG, reduce gauging error, make the trade of LNG more fair.
The present invention is achieved through the following technical solutions:
A kind of LNG vacuum calibrating installation, comprise: vacuum comparator, described vacuum comparator comprises liquid phase stream gauge, vapor phase stream gauge, vacuum tank, liquid phase stream gauge and vapor phase stream gauge are installed in described vacuum tank, the front panel of described vacuum tank is provided with fluid inlet, liquid-phase outlet, gas phase import and gaseous phase outlet, the import and export of described liquid phase stream gauge by pipeline respectively with fluid inlet, liquid-phase outlet is communicated with, the import and export of described vapor phase stream gauge by pipeline respectively with gas phase import, gaseous phase outlet is communicated with, and the compound substance that will the outer wall of all pipelines in vacuum tank is all provided with layer of glass and aluminium foil and makes.
In technique scheme, by by liquid phase stream gauge, vapor phase stream gauge is arranged in vacuum tank, the mode of application vacuum heat-insulation, reduce air dielectric as transmitter transferring heat, the outer wall of all pipelines in vacuum tank is all provided with the compound substance that layer of glass and aluminium foil are made, make the better effects if of insulation like this, thus it is minimum to make the gasification of LNG be reduced to, improve the precision of calibrating, make the trade of LNG more fair, and make LNG vacuum calibrating installation to work long hours and not freeze, thus improve the work efficiency of calibrating installation.
Further, the outer wall of described vacuum tank is provided with some windows, the rear panel of vacuum tank is upper outside is provided with the liquid phase stream transmitter and gas phase flow rate transmitter that are communicated with liquid phase stream gauge, vapor phase stream gauge respectively, the distance of the pipeline in vacuum tank and liquid phase stream gauge, vapor phase stream gauge and vacuum tank tank wall is not less than 30mm, can be 30mm, 35mm, 40mm, 45mm, 50mm, reduce the heat transfer that convection current is formed, the bottom of described vacuum tank is provided with installation foot, and described installation foot is arranged on underframe.
In technique scheme, some windows that the outer wall of vacuum tank is provided with, can be convenient when installing vacuum qualification device or overhaul by these windows, and need not overhaul at every turn all will take vacuum tank apart, the installation site of window can with the rapid wear in vacuum tank or pipe fitting adjacent; The liquid phase stream transmitter be provided with and gas phase flow rate transmitter can make calibrating installation safer, the distance of the pipeline in vacuum tank and liquid phase stream gauge, vapor phase stream gauge and vacuum tank tank wall is not less than 30mm, make the job requirement that vacuum heat-preserving and heat insulation effect can reach actual, LNG calibrating installation can be worked long hours, and the installation foot of vacuum tank can make vacuum tank fixedly mount.
Further, the output terminal of described liquid phase stream gauge is connected with evacuation port by the first arm, and described first arm is provided with safety valve; Described first arm is provided with the second arm be connected with evacuation port, and described second arm is provided with valve, and the downstream of the first arm and the second arm intersection is located at by described safety valve.
In technique scheme, by being provided with the first arm with safety valve, when making the hypertonia in vacuum comparator pipeline, too high pressure can be discharged by safety valve and evacuation port, the safety of assurance device and field staff; The second arm be provided with, by the valve on manual control second arm, can release the LNG in vacuum comparator as required, as when overhauling; The rear fragment position that the downstream of the first arm and the second arm intersection and safety valve are located at the first arm and the second arm intersection is located at by safety valve, and making the first arm be provided with safety valve and the second arm, to be provided with the LNG that valve can both control in arm emptying.
Further, the output terminal of described vapor phase stream gauge is connected with evacuation port by the 3rd arm, and described 3rd arm is provided with safety valve; Described 3rd arm is provided with the 4th arm be connected with evacuation port, and described 4th arm is provided with valve, and the downstream of the 4th arm and the 3rd arm intersection is located at by described safety valve.
In technique scheme, by being provided with the 3rd arm with safety valve, when making the hypertonia in vacuum comparator pipeline, too high pressure can be discharged by safety valve and evacuation port, the safety of assurance device and field staff; The 4th arm be provided with, by the valve on manual control the 4th arm, can release the LNG in vacuum comparator as required, as when overhauling; The rear fragment position that the downstream of the 3rd arm and the 4th arm intersection and safety valve are located at the first arm and the second arm intersection is located at by safety valve, and the LNG that the valve that the safety valve that the 3rd arm is provided with and the 4th arm are provided with can both control in arm is emptying.
Further, described liquid phase stream gauge, vapor phase stream gauge are coriolis mass flowmeters, and described liquid phase stream gauge, vapor phase stream gauge put upside down installation mutually.
In technique scheme, by liquid phase stream gauge, vapor phase stream gauge are set to coriolis mass flowmeters make the measurement of LNG more accurate, described liquid phase stream gauge, vapor phase stream gauge put upside down installation mutually, make the space of duty less, make calibrating installation miniaturization.
Further, described underframe is provided with casing vacuum comparator, liquid phase stream transmitter, gas phase flow rate transmitter, the first arm, the second arm, the 3rd arm, the 4th arm, safety valve surrounded, the bottom of underframe is provided with some legs.
In technique scheme, by being arranged in casing by vacuum comparator, liquid phase stream transmitter, gas phase flow rate transmitter, the first arm, the second arm, the 3rd arm, the 4th arm, safety valve, casing can protect these devices.
Further, in described casing, anti-explosion electric source capsule is also installed.
In technique scheme, the anti-explosion electric source capsule of installation has explosion-proof effect, makes LNG calibrating installation safer.
Further, described second arm/the first arm is provided with the 5th arm, and the end of described 5th arm is provided with tensimeter, and the tensimeter be provided with can pressure condition at any time in monitored pipeline, the convenient pressure understood in real time in practical operation in pipeline.
The invention has the beneficial effects as follows:
1, by liquid phase stream gauge, vapor phase stream gauge are located in vacuum tank and are formed vacuum comparator, the outer wall of all pipelines in vacuum tank is all provided with the compound substance that layer of glass and aluminium foil are made, vacuum tank is made to have good Heat retaining and insulation effect by vacuum and compound substance two kinds of heat preserving modes, reduce the gasification of LNG to greatest extent, thus make the calibration accuracy of calibrating installation higher, make the trade of LNG more fair, and can work long hours and not freeze, improve the work efficiency of LNG calibrating installation;
2, by being provided with window on the vacuum box, can be convenient when installing vacuum qualification device or overhaul by these windows, and need not overhaul at every turn all will take vacuum tank apart;
3, by being provided with the first arm, the second arm, the 3rd arm, the 4th arm and valve, calibrating installation can be made safer.
Accompanying drawing explanation
Fig. 1 is casing internal general structure schematic diagram of the present invention;
Fig. 2 is casing of the present invention outside and partial internal structure schematic diagram;
Fig. 3 is liquid phase stream gauge and vapor phase stream gauge installation diagram in vacuum tank of the present invention.
Mark in figure: 1 be casing, 2 be underframe, 3 be vacuum comparator, 301 be window, 302 be liquid phase stream gauge, 303 be vapor phase stream gauge, 304 be vacuum tank, 305 be fluid inlet, 306 be liquid-phase outlet, 307 be gas phase import, 308 be gaseous phase outlet, 4 be liquid phase stream transmitter, 5 be gas phase flow rate transmitter, 6 be anti-explosion electric source capsule, 7 be evacuation port, 8 for tensimeter.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
LNG vacuum calibrating installation as shown in Figure 1, comprises casing 1, underframe 2, vacuum comparator 3, window 301, liquid phase stream gauge 302, vapor phase stream gauge 303, vacuum tank 304, fluid inlet 305, liquid-phase outlet 306, gas phase import 307, gaseous phase outlet 308, liquid phase stream transmitter 4, gas phase flow rate transmitter 5, anti-explosion electric source capsule 6, evacuation port 7, tensimeter 8, is provided with liquid phase stream gauge 302 and vapor phase stream gauge 303, the front panel of described vacuum tank 304 is provided with fluid inlet 305 in described vacuum tank 304, liquid-phase outlet 306, gas phase import 307, gaseous phase outlet 308, the import and export of described liquid phase stream gauge 302 by pipeline respectively with fluid inlet 305, liquid-phase outlet 306 is communicated with, the import and export of described vapor phase stream gauge 303 by pipeline respectively with gas phase import 307, gaseous phase outlet 308 is communicated with, vacuum tightness in vacuum tank 304 absolute pressure under liquid nitrogen temperature is better than 0.005pa, by the compound substance outer wall of all pipelines in vacuum tank 304 being all provided with layer of glass and aluminium foil and making, the shape of vacuum tank 304 is cylindrical.
The outer wall of described vacuum tank 304 is provided with some windows 301, the quantity of window 301 is generally 4, the rear panel of vacuum tank 304 is upper outside be provided with respectively with liquid phase stream gauge 302, the liquid phase stream transmitter 4 that vapor phase stream gauge 303 is communicated with, gas phase flow rate transmitter 5, pipeline in vacuum tank 304 and liquid phase stream gauge 302, vapor phase stream gauge 303 is not less than 30mm with the distance of vacuum tank 304 tank wall, can be 35mm, the bottom of described vacuum tank 304 is provided with installation foot, the outer wall of all pipelines in vacuum tank 304 is all provided with the compound substance that layer of glass and aluminium foil are made, described installation foot is arranged on underframe 2.
The output terminal of described liquid phase stream gauge 302 is connected with evacuation port 7 by the first arm, and described first arm is provided with safety valve; Described first arm is provided with the second arm be connected with evacuation port 7, and described second arm is provided with valve, and the valve that the second arm is provided with can be hand stop valve, and the downstream of the first arm and the second arm intersection is located at by described safety valve.
The output terminal of described vapor phase stream gauge 303 is connected with evacuation port 7 by the 3rd arm, and described 3rd arm is provided with safety valve; Described 3rd arm is provided with the 4th arm be connected with evacuation port 7, and described 4th arm is provided with valve, and the valve that the 4th arm is provided with can be hand stop valve, and the downstream of the 4th arm and the 3rd arm intersection is located at by described safety valve.
First arm, the second arm, the 3rd arm, the 4th arm are all arranged in casing 1, the hand stop valve that the second arm and the 4th arm are provided with can switching knob be located at the outside of casing 1, the convenient switch controlling stop valve.
Described liquid phase stream gauge 302, vapor phase stream gauge 303 are coriolis mass flowmeters, described liquid phase stream gauge 302, vapor phase stream gauge 303 put upside down installation mutually, liquid phase stream gauge 302 is arranged on the back of vapor phase stream gauge 303, vapor phase stream gauge 303 encases by liquid phase stream gauge 302, improves space occupancy rate.
Described underframe 2 is provided with the casing 1 vacuum comparator 3, liquid phase stream transmitter 4, gas phase flow rate transmitter 5, first arm, the second arm, the 3rd arm, the 4th arm, safety valve surrounded, the bottom of underframe 2 is provided with some legs, underframe 2 is rectangle, and the quantity of leg is generally 4.
Also be provided with anti-explosion electric source capsule 1 in described casing 1, the anti-explosion electric source capsule of installation has explosion-proof effect, makes LNG calibrating installation safer.
Described second arm/the first arm is provided with the 5th arm, and the end of described 5th arm is provided with tensimeter 8.
By liquid phase stream gauge 302, vapor phase stream gauge 303 are located in vacuum tank 304 and are formed vacuum comparator, the outer wall of all pipelines in vacuum tank 304 is all provided with the compound substance that layer of glass and aluminium foil are made, vacuum tank 304 is made to have good Heat retaining and insulation effect by vacuum and compound substance two kinds of heat preserving modes, reduce the gasification of LNG to greatest extent, thus make the calibration accuracy of calibrating installation higher, make the trade of LNG more fair, and can work long hours and not freeze, improve the work efficiency of LNG calibrating installation; Vacuum tank 304 is provided with window 301, can be convenient when installing vacuum qualification device or overhaul by these windows 301, and need not overhaul at every turn all will take vacuum tank 304 apart, improve the efficiency of maintenance; By being provided with the first arm, the second arm, the 3rd arm, the 4th arm and the safety valve be provided with on each arm and hand stop valve, make calibrating installation can automatically to pressure pressure release too high in pipeline, calibrating installation can be made safer, and come the LNG in comparator emptying by Non-follow control stop valve.
LNG vacuum calibrating installation of the present invention is when carrying out liquid feeding to LNG liquid addition machine, and the time of can going up is run, and within 4 hours, does not have any icing phenomenon at least continuous working, and calibrating duration and calibration accuracy improve greatly.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. a LNG vacuum calibrating installation, it is characterized in that, comprise: vacuum comparator (3), described vacuum comparator (3) comprises liquid phase stream gauge (302), vapor phase stream gauge (303), vacuum tank (304), liquid phase stream gauge (302) and vapor phase stream gauge (303) are installed in described vacuum tank (304), the front panel of described vacuum tank (304) is provided with fluid inlet (305), liquid-phase outlet (306), gas phase import (307), gaseous phase outlet (308), the import and export of described liquid phase stream gauge (302) by pipeline respectively with fluid inlet (305), liquid-phase outlet (306) is communicated with, the import and export of described vapor phase stream gauge (303) by pipeline respectively with gas phase import (307), gaseous phase outlet (308) is communicated with.
2. LNG vacuum calibrating installation as claimed in claim 1, it is characterized in that, the outer wall of described vacuum tank (304) is provided with some windows (301), the rear panel of vacuum tank (304) is upper outside be provided with respectively with liquid phase stream gauge (302), the liquid phase stream transmitter (4) that vapor phase stream gauge (303) is communicated with, gas phase flow rate transmitter (5), pipeline in vacuum tank (304) and liquid phase stream gauge (302), vapor phase stream gauge (303) is not less than 30mm with the distance of vacuum tank (304) tank wall, in vacuum tank (304) all pipelines outer wall on be all provided with the compound substance that layer of glass and aluminium foil make, the bottom of described vacuum tank (304) is provided with installation foot, described installation foot is arranged on underframe (2).
3. LNG vacuum calibrating installation as claimed in claim 2, is characterized in that, the output terminal of described liquid phase stream gauge (302) is connected with evacuation port (7) by the first arm, and described first arm is provided with safety valve; Described first arm is provided with the second arm be connected with evacuation port (7), and described second arm is provided with valve, and the downstream of the first arm and the second arm intersection is located at by described safety valve.
4. LNG vacuum calibrating installation as claimed in claim 3, is characterized in that, the output terminal of described vapor phase stream gauge (303) is connected with evacuation port (7) by the 3rd arm, and described 3rd arm is provided with safety valve; Described 3rd arm is provided with the 4th arm be connected with evacuation port (7), and described 4th arm is provided with valve, and the downstream of the 4th arm and the 3rd arm intersection is located at by described safety valve.
5. LNG vacuum calibrating installation as claimed in claim 4, it is characterized in that, described liquid phase stream gauge (302), vapor phase stream gauge (303) are coriolis mass flowmeters, and described liquid phase stream gauge (302), vapor phase stream gauge (303) put upside down installation mutually.
6. LNG vacuum calibrating installation as claimed in claim 5, it is characterized in that, described underframe (2) is provided with the casing (1) vacuum comparator (3), liquid phase stream transmitter (4), gas phase flow rate transmitter (5), the first arm, the second arm, the 3rd arm, the 4th arm, safety valve surrounded, the bottom of underframe (2) is provided with some legs.
7. LNG vacuum calibrating installation as claimed in claim 6, is characterized in that, be also provided with anti-explosion electric source capsule (1) in described casing (1).
8. LNG vacuum calibrating installation as claimed in claim 7, it is characterized in that, described second arm/the first arm is provided with the 5th arm, and the end of described 5th arm is provided with tensimeter (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610167205.8A CN105571670A (en) | 2016-03-23 | 2016-03-23 | LNG vacuum calibrating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610167205.8A CN105571670A (en) | 2016-03-23 | 2016-03-23 | LNG vacuum calibrating device |
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| CN105571670A true CN105571670A (en) | 2016-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610167205.8A Pending CN105571670A (en) | 2016-03-23 | 2016-03-23 | LNG vacuum calibrating device |
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| CN (1) | CN105571670A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989802A (en) * | 2017-05-22 | 2017-07-28 | 中国测试技术研究院流量研究所 | A kind of device for improving the cryogenic liquid gauge check degree of accuracy |
| CN107063404A (en) * | 2017-04-13 | 2017-08-18 | 成都安迪生测量有限公司 | A kind of scaling method of deep cooling liquid level measuring appliance |
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| CN202033082U (en) * | 2011-03-16 | 2011-11-09 | 成都华气厚普机电设备股份有限公司 | LNG (Liquefied Natural Gas) site calibrating device |
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2016
- 2016-03-23 CN CN201610167205.8A patent/CN105571670A/en active Pending
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| US7454956B1 (en) * | 2005-09-22 | 2008-11-25 | Lopresti William J | Heat exchanger leak detection using mass gas flow metering |
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| CN202033082U (en) * | 2011-03-16 | 2011-11-09 | 成都华气厚普机电设备股份有限公司 | LNG (Liquefied Natural Gas) site calibrating device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063404A (en) * | 2017-04-13 | 2017-08-18 | 成都安迪生测量有限公司 | A kind of scaling method of deep cooling liquid level measuring appliance |
| CN107063404B (en) * | 2017-04-13 | 2023-06-20 | 成都安迪生测量有限公司 | Calibration method of cryogenic liquid level measuring instrument |
| CN106989802A (en) * | 2017-05-22 | 2017-07-28 | 中国测试技术研究院流量研究所 | A kind of device for improving the cryogenic liquid gauge check degree of accuracy |
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Application publication date: 20160511 |
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