CN208596125U - A kind of liquid natural gas gasification rate measuring device - Google Patents
A kind of liquid natural gas gasification rate measuring device Download PDFInfo
- Publication number
- CN208596125U CN208596125U CN201821040650.9U CN201821040650U CN208596125U CN 208596125 U CN208596125 U CN 208596125U CN 201821040650 U CN201821040650 U CN 201821040650U CN 208596125 U CN208596125 U CN 208596125U
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- China
- Prior art keywords
- natural gas
- flange
- liquid natural
- gasification rate
- resistance
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- 238000002309 gasification Methods 0.000 title claims abstract description 50
- 239000003949 liquefied natural gas Substances 0.000 title claims abstract description 50
- 239000006200 vaporizer Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 8
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 239000003345 natural gas Substances 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- Measuring Volume Flow (AREA)
Abstract
The utility model discloses a kind of liquid natural gas gasification rate measuring devices, including meter ontology, the vaporizer of meter ontology connection testing liquid natural gas, the second straight pipe outside the first straight pipe and exhaust outlet outside the air inlet of vaporizer uses flanged joint, the air inlet and inside exhaust ports of vaporizer are respectively equipped with thermistor and flow velocity compensation resistance, the resistance of thermistor and flow velocity compensation resistance respectively with meter body interior connects and composes electric bridge, the gasification rate and adjust the imbalance of the electric bridge due to caused by the variation of gasification rate that meter ontology is used to measure liquid natural gas in vaporizer, electric bridge is set to restore balance.The utility model, it can prevent liquid natural gas gasification is insufficient to cause natural gas waste and environmental pollution caused by failure and gasification excess, to realize the high-acruracy survey, save the cost and reduction environmental pollution of gasification rate, and the measuring device is simple and reliable for structure, and measurement accuracy is higher.
Description
Technical field
The utility model relates to field of measuring technique, and in particular to a kind of liquid natural gas gasification rate measuring device.
Background technique
Natural gas is essential important energy source in people's life and work, and wherein liquefied natural gas is the shape with liquid
Formula storage usually utilizes the natural gas of gas but when practical application, therefore, it is necessary to by liquefied natural gas into
Promoting the circulation of qi.In the gasification to liquefied natural gas, gasification deficiency can then cause failure, and gasification is excessive then to will lead to natural gas
Waste and environmental pollution.Therefore, it in the gasification of liquefied natural gas, needs to carry out essence to the gasification rate of liquid natural gas
True measurement is precisely controlled liquefied natural gas gasifying process to realize.
For the problems in the relevant technologies, currently no effective solution has been proposed.
Utility model content
Technical problem to be solved in the utility model is how accurately to be measured liquid natural gas gasification rate,
To realize the problem of being precisely controlled to liquid natural gas gasification.
In order to solve the above-mentioned technical problem, technical solution used by the utility model is to provide a kind of liquid natural gas gas
Change rate measurement device, including meter ontology, the vaporizer of the meter ontology connection testing liquid natural gas, the gas
Change the second straight pipe outside the first straight pipe and exhaust outlet outside the air inlet of room and uses flanged joint, the vaporizer
Air inlet and inside exhaust ports are respectively equipped with thermistor and flow velocity compensation resistance, the thermistor and flow velocity compensation resistance point
Electric bridge is not connected and composed with the resistance of the meter body interior, meter ontology is for measuring the liquid natural gas in institute
It states the gasification rate in vaporizer and adjusts the imbalance of the electric bridge due to caused by the variation of gasification rate, electric bridge is made to restore flat
Weighing apparatus；
The flange includes the first flange being fixedly connected with first straight pipe and fixes with second straight pipe
Multiple bolts hole for being capable of fixing bolt are installed on the circumference of the second flange of connection, the first flange and second flange,
The both ends of the bolt pass through nut respectively and are fixedly connected with the first flange and second flange.
In the above scheme, the first gasket is respectively equipped between the nut and the first flange and second flange
Circle.
In the above scheme, the first flange and second flange side close to each other are arranged with the second gasket
Circle.
In the above scheme, offered on second seal washer in first straight pipe and the second straight pipe
The identical through-hole of diameter.
In the above scheme, first straight pipe, the second straight pipe, first flange, second flange and described second
The central axis of seal washer coincides.
In the above scheme, the resistance of the meter body interior includes precision resistance and amendable precision resistance.
In the above scheme, the resistance wire of the thermistor uses platinum wire material.
The utility model be directed to liquefied natural gas gasifying during, how the size of accurate perception amount of vaporization, provide one
Kind liquid natural gas gasification rate measuring device can be caused in gasification by temperature change by detecting liquefied natural gas
Resistance variation mode, the size of the gasification rate of liquid natural gas is accurately measured indirectly, passes through adjusting
The electric bridge due to caused by the variation of gasification rate is uneven, keeps the electric bridge rate recovery that restores balance and gasify normal, thus reality
Now liquefied natural gas gasifying process is precisely controlled.The measuring device that the utility model uses is simple and reliable for structure, measures model
Enclose wider, and measurement accuracy is higher, can prevent liquid natural gas gasification it is insufficient cause it is natural caused by failure and gasification excess
Blast takes and environmental pollution, to realize the high-acruracy survey of liquid natural gas gasification rate, save the cost and reduce ring
Border pollution.
Detailed description of the invention
Fig. 1 is a kind of liquid natural gas gasification rate measuring device structural schematic diagram provided by the utility model.
Drawing reference numeral: 1- nut；The first seal washer of 2-；3- flange；The first straight pipe of 4-；The second seal washer of 5-；6-
Bolt；The second straight pipe of 7-；8- vaporizer；9- thermistor；10- flow velocity compensates resistance；11- meter ontology.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings of the specification.
As shown in Figure 1, a kind of liquid natural gas gasification rate measuring device provided by the utility model, including meter sheet
Body 11, meter ontology 11 connect the vaporizer 8 of testing liquid natural gas, the first straight pipe 4 outside the air inlet of vaporizer 8
It is connect with the second straight pipe 7 outside exhaust outlet using flange 3, in vaporizer 8, according to gas flow direction, in vaporizer 8
Air inlet and inside exhaust ports are respectively equipped with thermistor 9 and flow velocity compensation resistance 10, and thermistor 9 and flow velocity compensate resistance 10
Electric bridge is connected and composed with the resistance inside meter ontology 11 respectively, meter ontology 11 is gasifying for measuring liquid natural gas
Gasification rate and the adjusting electric bridge due to caused by the variation of gasification rate in room 8 is uneven, and electric bridge is made to restore balance.
Optionally, the water triple point resistance that thermistor 9 passes through thermometer measure is (100 ± 1) Ω；Flow velocity compensates resistance
The 10 water triple point resistance for passing through thermometer measure are (25 ± 1) Ω.
Optionally, flange 3 includes the first flange being fixedly connected with the first straight pipe 4 and fixes company with the second straight pipe 7
Multiple bolts hole for being capable of fixing bolt 6, bolt 6 are installed on the circumference of the second flange connect, first flange and second flange
Both ends pass through nut 1 respectively and be fixedly connected with first flange and second flange.
Optionally, it is respectively equipped with the first seal washer 2 between nut 1 and first flange and second flange, ensure that sealing
Performance.
Optionally, first flange and second flange side close to each other are arranged with the second seal washer 5, ensure that sealing
Performance, although it will be understood by those of skill in the art that it is illustrated in the present embodiment using the first seal washer 2, second
The mode of seal washer 5 improves sealing performance, but those skilled in the art can use other sealing means according to actual needs,
The utility model does not limit this.
Optionally, it is offered on the second seal washer 5 identical with the interior diameter of the first straight pipe 4 and the second straight pipe 7
Through-hole.
Optionally, in the first straight pipe 4, the second straight pipe 7, first flange, second flange and the second seal washer 5
Mandrel line coincides.
Optionally, meter ontology 11 has been internally integrated bridge balance potentiometer, galvanometer, potentiometer, adjustable electric piezoelectricity
Source, integrated circuit, precision resistance and precision resistance can be corrected, the resistance value of the precision resistance is 100 Ω, the amendable accurate electricity
The Standard resistance range of resistance is 0-200 Ω；Integrated circuit is responsible for output signal amplification, simultaneously for controlling outputting and inputting for electric bridge
Be converted to digital signal.In addition, those skilled in the art can also choose suitable resistance, this reality according to actual needs
It is not limited this with novel.
Optionally, the resistance wire of thermistor 9 uses platinum wire material.
The technical solution of the utility model in order to facilitate understanding below carries out the technical solution of the utility model detailed
It introduces.
Arrange that thermistor 9, liquefied natural gas become gaseous process from liquid evaporation and take away in liquefied natural gas gasifying room 8
Heat and decline 9 temperature of thermistor, liquefied natural gas gasifying rate is faster, then takes away that heat is more, the temperature of thermistor 9
Degree decline is more.An arm of the thermistor 9 as electric bridge, it is the resistance with positive temperature coefficient, when temperature declines
When then resistance value become smaller, becoming smaller for resistance value causes electric bridge uneven at this time.When electric bridge imbalance occurs, bridge balance voltage
Meter inputs unbalanced signal to integrated circuit, and integrated circuit amplifies unbalanced signal and is converted to digital signal and is output to
Adjustable voltage power supply and galvanometer make thermistor 9 keep constant temperature, constant and restore electric bridge to reach 9 resistance value of thermistor
Balance, if gasification rate increases at this time, electric current increases；Gasification rate reduces, then electric current reduces.
Wherein, the temperature difference of the temperature of thermistor 9 and flow velocity compensation resistance 10 is definite value, is controlled under normal circumstances
100 DEG C, when the thermistor 9 added with electric current is placed in flow field, due to fluid-flow relation, 9 temperature of thermistor occurs
Changing, this change immediately results in electric bridge and deviates balance, so that unbalanced signal is exported, the amplified feedback of the unbalanced signal
Into electric bridge, to inhibit the temperature of thermistor 9 to change, the variation of 9 resistance of thermistor is compensated, so that electric bridge be made to restore flat
Weighing apparatus.
Control process is as follows: when the flow inside vaporizer 8 increases, 9 temperature of thermistor is reduced, and thermistor 9 hinders
Value reduces, and the voltage between thermistor 9 and flow velocity compensation resistance 10 decreases；Thermistor 9 and flow velocity compensate resistance 10
Between voltage reduction cause servo amplifier load voltage increase, thus make 9 both end voltage of thermistor increase；To
Lead to the increase of bridge voltage；The increase of bridge voltage causes to increase by the electric current of thermistor 9, reheats sensitive member
Part increases so that thermistor 9 and flow velocity be made to compensate the voltage between resistance 10, reduces 9 both end voltage of thermistor, make electric bridge
It restores balance.
Precision resistance is connected with thermistor 9, and the electric current of series circuit is equal, and the electric current of thermistor 9 again flows through essence
The power cathode of cipher telegram resistance, at this moment generates a voltage on precision resistance, and the variation of this voltage swing and size of current become
It is melted into direct ratio and gasification rate variation is directly proportional.Output signal of the voltage of the precision resistance as gasification rate size.
In the case where liquefied natural gas gasifying amount is constant, when gas flow rate is different, the heat taken away from thermistor 9
Also different, therefore resistance 10 is compensated using flow velocity in electric bridge.After flow velocity compensation resistance 10 is arranged in liquefied natural gas gasifying
Pipeline in, flow velocity compensation resistance 10 change in resistance gasification rate variation and change, to change bridge balance, make flow velocity not
The measurement error with caused by is compensated, to guarantee the accuracy of measurement.
Flow velocity compensation resistance 10 is integrated by series and parallel compensated resistance, and one of resistance is thermally sensitive element, its quilt
Be arranged in flow field identical with thermistor 9, and with the temperature coefficient having the same of thermistor 9.Manufacturing the upper temperature
Degree sensing element is made of the coil with larger area.When known to the resistance value of series and parallel compensated resistance, voltage can be extrapolated
The resistance value of the series resistance and parallel resistance that keep constant.
The utility model be directed to liquefied natural gas gasifying during, how the size of accurate perception amount of vaporization, provide one
Kind liquid natural gas gasification rate measuring device can be caused in gasification by temperature change by detecting liquefied natural gas
Resistance variation mode, the size of the gasification rate of liquid natural gas is accurately measured indirectly, passes through adjusting
The electric bridge due to caused by the variation of gasification rate is uneven, keeps the electric bridge rate recovery that restores balance and gasify normal, thus reality
Now liquefied natural gas gasifying process is precisely controlled.The measuring device that the utility model uses is simple and reliable for structure, measures model
Enclose wider, and measurement accuracy is higher, can prevent liquid natural gas gasification it is insufficient cause it is natural caused by failure and gasification excess
Blast takes and environmental pollution, to realize the high-acruracy survey of liquid natural gas gasification rate, save the cost and reduce ring
Border pollution.
The utility model is not limited to above-mentioned preferred forms, and anyone should learn that under the enlightenment of the utility model
The structure change made, it is all that there is same or similar technical solution with the utility model, each fall within the guarantor of the utility model
Within the scope of shield.
Claims (7)
1. a kind of liquid natural gas gasification rate measuring device, which is characterized in that including meter ontology, the meter ontology
The vaporizer for connecting testing liquid natural gas, the outside the first straight pipe and exhaust outlet outside the air inlet of the vaporizer
Two straight pipes use flanged joint, and the air inlet and inside exhaust ports of the vaporizer are respectively equipped with thermistor and flow velocity compensation
Resistance, the resistance of the thermistor and flow velocity compensation resistance respectively with the meter body interior connect and compose electric bridge, survey
The gasification rate and adjust due to gasification rate that meter ontology is used to measure the liquid natural gas in the vaporizer
Electric bridge caused by variation is uneven, and electric bridge is made to restore balance；
The flange includes the first flange being fixedly connected with first straight pipe and is fixedly connected with second straight pipe
Second flange, be installed with multiple bolts hole for being capable of fixing bolt on the circumference of the first flange and second flange, it is described
The both ends of bolt pass through nut respectively and are fixedly connected with the first flange and second flange.
2. liquid natural gas gasification rate measuring device as described in claim 1, which is characterized in that the nut and described the
The first seal washer is respectively equipped between one flange and second flange.
3. liquid natural gas gasification rate measuring device as claimed in claim 2, which is characterized in that the first flange and institute
It states second flange side close to each other and is arranged with the second seal washer.
4. liquid natural gas gasification rate measuring device as claimed in claim 3, which is characterized in that opened on the seal washer
Equipped with through-hole identical with the interior diameter of first straight pipe and the second straight pipe.
5. liquid natural gas gasification rate measuring device as claimed in claim 4, which is characterized in that first straight pipe,
Second straight pipe, first flange, second flange and second seal washer central axis coincide.
6. liquid natural gas gasification rate measuring device as described in claim 1, which is characterized in that in the meter ontology
The resistance in portion includes precision resistance and amendable precision resistance.
7. liquid natural gas gasification rate measuring device as described in claim 1, which is characterized in that the electricity of the thermistor
It hinders silk and uses platinum wire material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821040650.9U CN208596125U (en) | 2018-06-29 | 2018-06-29 | A kind of liquid natural gas gasification rate measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821040650.9U CN208596125U (en) | 2018-06-29 | 2018-06-29 | A kind of liquid natural gas gasification rate measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208596125U true CN208596125U (en) | 2019-03-12 |
Family
ID=65602247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821040650.9U Expired - Fee Related CN208596125U (en) | 2018-06-29 | 2018-06-29 | A kind of liquid natural gas gasification rate measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208596125U (en) |
-
2018
- 2018-06-29 CN CN201821040650.9U patent/CN208596125U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190312 |