CN204494075U - There is the LNG filling measuring apparatus keeping function from pre-cold-peace low temperature - Google Patents
There is the LNG filling measuring apparatus keeping function from pre-cold-peace low temperature Download PDFInfo
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- CN204494075U CN204494075U CN201520122766.7U CN201520122766U CN204494075U CN 204494075 U CN204494075 U CN 204494075U CN 201520122766 U CN201520122766 U CN 201520122766U CN 204494075 U CN204494075 U CN 204494075U
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Abstract
A kind of have the LNG filling measuring apparatus keeping function from pre-cold-peace low temperature, after LNG filling machine starts, first measure the output terminal temperature of flowmeter, when temperature carries main line higher than closing LNG during rated temperature, and from LNG delivery source, homogeneity LNG is injected the heat sink room of sink type flowmeter by conveying branch road, flow meter is lowered the temperature in advance, until output terminal temperature starts the conveying of clearing metering after meeting the demands.The utility model use LNG delivery source as refrigerant realize Leng Que low temperature keep, the bypass channel measuring irrelevant cooling is settled accounts by adding independently, with LNG, the LNG that user measures is separated with pre-colod-application LNG, eliminate the intrinsic pre-cooling cycle passage that need be measured by clearing and also effectively eliminate the defect of settling accounts metering pipeline system architecture in traditional liquid filler cooling procedure, provide significant conservation the liquid feeding time, the more important thing is that thoroughly avoiding precooling process need take denouncing of clearing measurement channel.
Description
Technical field
The utility model relates to a kind of technology of cryogen metering field, specifically a kind of have the LNG filling measuring apparatus keeping function from pre-cold-peace low temperature, can when annotating metering system precooling, homogeneity refrigerant LNG no longer through charging measurement channel, thus ensure that the rationality of charging metering system.
Background technique
One of energy that China of LNG is important, along with ventilation and the expansion of West-East National Gas Transmission Project, be also the exploitation success of response following China offshore gas field, state's completing to China's air feed engineering such as Russia, New Energy Sources In China market enters Rapid development stage.Heavily block, bus carry out apply rock gas particularly apply LNG Liquefied natural gas LNG transformation basis on, shipping, railway and mass movement also will enter LNG application transformation, the consumption of LNG will increase sharply.Also comprise the big factors considering Air Pollution Control, haze improvement around here.Thus, the consumption of flowmeter that LNG sells also is risen thereupon, also can propose new requirement to its degree of accuracy in metering and energy-saving index.
The special LNG that in current China market, not yet promising LNG makes to measure ?CMF (in Coriolis Mass Flowmeter section mass flowmenter difficult to understand), the flowmeter of the LNG filling machine extensively adopted, himself has and has special refrigerating function.And when actual metered, due to LNG be in Yue ?82 Zhi ?the low-temperature condition of 169 DEG C, for LNG metering flowmeter also therefore using ?less than 140 DEG C or lower temperature as operating range.If the rock gas that filling machine higher than operation during said temperature, flows through flowmeter likely Cheng Qi ?the two phase flow situation of liquid, cause the deviation of settling accounts metering.Based on this reason, LNG filling machine is in order to ensure that built-in LNG stream gauge is in this warm area when liquid feeding, first must carry out circulating cooling to LNG stream gauge before charging fluid injection, namely liquid feeding rifle is inserted circulation port, start the operation of non-charging liquid feeding, when LNG stream gauge reaches rated temperature, close cooling down operation again, liquid feeding rifle is inserted the filling opening of user's storage tank, and then start the liquid feeding operation starting charging.Twice aerating activity duration when longer, often to repeat precooling, thus reduce working efficiency.Again because LNG colod-application in advance also flows through the flowmeter of clearing, be present in the hidden danger caused in the structural design of user benefit loss thus.
Model utility content
The utility model is for the deficiency that existing LNG aerating (liquid) machine flowmeter does not possess cooling, low temperature keeps function, a kind of LNG filling measuring apparatus had from pre-cold-peace low temperature maintenance function is proposed, use LNG delivery source as refrigerant realize Leng Que ?low temperature keep, the LNG that user measures is separated with pre-colod-application LNG, while guaranteeing that add flow meters is in specified operating temperature range always, effectively eliminate the defect of settling accounts metering pipeline system architecture in traditional liquid filler cooling procedure; The utility model additionally need not change original basic pipeline configuration, the bypass channel measuring irrelevant cooling is settled accounts by adding independently, with LNG, eliminate the intrinsic pre-cooling cycle passage that need be measured by clearing, and save the operation of outer circulation cooling, provide significant conservation the liquid feeding time, the more important thing is that thoroughly avoiding precooling process need take denouncing of clearing measurement channel.
The utility model is achieved through the following technical solutions:
The utility model relates to a kind of system realizing said method, comprising: be arranged at LNG between LNG delivery source and LNG air return end carry main line, conveying branch road and be arranged in series control valve on conveying branch road successively, flowmeter is heat sink room and check valve.
Described LNG carries main line to comprise: the described liquid phase stream gauge be arranged in series successively, clearing metering valve, LNG receive storage tank and vapor phase stream gauge, wherein: the entry end of liquid phase stream gauge is all connected with LNG delivery source with described conveying branch road, the air outlet that entry end and the LNG of vapor phase stream gauge receive storage tank is connected, and outlet end is all connected with LNG air return end with described conveying branch road.
Described liquid phase stream gauge and heat sink room can be that traditional LNG stream gauge adds external cooler, are preferably integral structure.
After the flowmeter precooling of filling machine, reach the upper limit of processing temperature, filling machine can carry out metering work.During operation, because the LNG stream of large discharge is through flowmeter, the temperature of flowmeter can drop from temperature when starting metering work, the progressively temperature of convergence delivery source.Now, heat sink control valve is closed; When aerating operation is interrupted, filling machine piping is by the impact of ambient temperature, and flow meter temperature can rise gradually.When again starting aerating operation, as long as the temperature of flowmeter outlet end is lower than upper limiting temperature, heat sink control valve still can be in closedown situation; Once when the temperature of flowmeter outlet end is higher than in upper limiting temperature, then open heat sink control valve, heat sink room enters precooling situation again.
Technique effect
Compared with prior art, the utility model application have heat sink function LNG ?CMF, in LNG filling machine pipe-line system using homogeneity LNG as refrigerant, and the LNG channel separation that the LNG passage that pre-cold-peace low temperature is kept measures with clearing, avoid pre-colod-application LNG and may be settled accounts denouncing of metering, realizing adding the cooling of flow meters so that it is in rated temperature range all the time, ensure that the accurate of metering; Adopt built-in cooling channel, without the need to returning the operation of slotting circulation port again with liquid feeding rifle head, simplify system, improve operating efficiency.
Accompanying drawing explanation
Fig. 1 is existing LNG refueling system schematic diagram.
Fig. 2 is the utility model system schematic;
Fig. 3 is embodiment's liquid phase stream gauge schematic diagram;
In figure: 1 filling opening, 2LNG inputs supervisor, 3 by-pass tees, 4 refrigerants inject bypass channel, 5 heat sink control valves, 6 coolant injection tubes, 7 heat sink rooms, 8 refrigerant delivery lines, 9 check valves, 10 refrigerant recovering by-pass pipes, 11 by-pass tees, 12LNG return-air is responsible for, 13 gas returning ports, 14 liquid phase stream gauge, 15 temperature transducers, the enable control valve of 16 clearing metering, 17LNG output interface, 18 liquid feeding rifles, 19 debit's LNG storage tank, 20 return-air rifles, 21 return-air interfaces, 22 vapor phase stream gauge, heat sink housing 23, vacuum chamber 24, heat sink inlet 25, heat sink export mouth 26, flowmeter input end 27, flowmeter output terminal 28.
Embodiment
Below embodiment of the present utility model is elaborated; the present embodiment is implemented under premised on technical solutions of the utility model; give detailed mode of execution and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
Embodiment 1
As shown in Figure 2, the present embodiment comprises: be arranged at LNG between filling opening 1 and gas returning port 13 carry main line, conveying branch road and be arranged in series control valve 5 on conveying branch road successively, flowmeter is heat sink room 7 and check valve 9.
Described control valve 5 is connected with the temperature transducer being arranged at liquid phase stream gauge 14 outlet end, exports control command conducting control valve 5 and open conveying branch road when the temperature that temperature transducer detects exceedes threshold range.
As shown in Figure 2, LNG in the present embodiment carries branch road to comprise: inject bypass channel 4, heat sink control valve 5, coolant injection tube 6, heat sink room 7, refrigerant delivery line 8, check valve 9 and refrigerant recovering by-pass pipe 10 from inputting with LNG the by-pass tee 3 that supervisor 2 is connected to the refrigerant between the by-pass tee 11 be connected with gas returning port.
Described control valve 5 realizes the conveying unlatching of branch road, closedown and flow control according to control command.
Described check valve 9 is one-way conduction; When heat sink room reaches predetermined temperature, particularly be in liquid feeding situation, heat sink control valve 5 can be closed, heat sink room, due to the heat absorption of interior pipe liquid feeding LNG, makes that the temperature of heat sink room declines, pressure also declines thereupon, now, the return-air that the temperature of reflow pipe is higher understands possibility suck-back to heat sink room, cause unnecessary cryogenic flow to become estranged gas phase recoil adverse current, therefore the conducting direction of check valve 9 be filling opening 1 to gas returning port 13, thus effectively prevent return-air from pouring in down a chimney.
LNG in the present embodiment carries main line to comprise: input from LNG the described liquid phase stream gauge 14 be arranged in series successively between by-pass tee 3 that supervisor 2 is connected to the by-pass tee 11 be connected with gas returning port, clearing metering valve 16, LNG output interface 17, liquid feeding rifle 18, LNG receives storage tank 19, return-air rifle 20, return-air interface 21 and vapor phase stream gauge 22, wherein: the entry end of liquid phase stream gauge 14 is all connected with filling opening 1 with described conveying branch road, the air outlet that entry end and the LNG of vapor phase stream gauge 22 receive storage tank 19 is connected, outlet end is all connected with gas returning port 13 with described conveying branch road.
As shown in Figure 3, liquid phase stream gauge in the present embodiment 14 and heat sink room 7 are integrated, and this is heat sink room 7 is for being coated on the heat sink housing 23 on liquid phase stream gauge 14
Described heat sink housing 23 is spherical, polyhedron or drum organization, and housing 23 is provided with heat sink inlet 25, heat sink export mouth 26.
The position of described heat sink inlet 25 is preferably the level height lower than heat sink export mouth 26.
The vibration measurement pipe outside of described liquid phase stream gauge 14 is preferably provided with vacuum chamber 24, and this vacuum chamber 24 and described heat sink housing 23 are for being tightly connected.
Described heat sink housing 23 inside is provided with guide plate (not shown) to improve heat sink efficiency further, and this guide plate can adopt C character form structure.
The reasonable conveying that the LNG that the present embodiment realizes user's metering in the following manner on flowmeter is separated with pre-colod-application LNG: after LNG liquid addition machine starts, the outlet temperature of temperature sensor measurement liquid phase stream gauge 14, if temperature is higher than the operating temperature ratings scope of flowmeter, second control valve 5 is locked closes, first control valve 5 is opened, the LNG liquid of supplier's storage tank 19 enters the first cooler of liquid phase stream gauge 14, is lowered the temperature by heat exchange effect flow meter.After flowing through the LNG heat absorption of the first cooler, temperature rises, and enter the second cooler of vapor phase stream gauge 22 again, it absorbs heat further again thereupon, and then imports gas returning port 13.
But temperature transducer confirms, the outlet temperature of liquid phase stream gauge 14 reaches specified scope, the closedown locking of the second control valve 5 is unlocked, and liquid filler can enter filling operation.Now, because liquid feeding self causes the low temperature in outlet port, the first control valve 5 can be closed, or is controlled in minimum maintenance flow.
But liquid filler waits for the situation of liquid feeding entering, influenced by ambient temperature, the temperature that liquid phase stream gauge 14 exports starts to rise, when its temperature is higher than operating temperature ratings, the flow of the first control valve 5 can change by the temperature changing trend of temperature sensor measurement, realize controlling the low-temperature condition of liquid phase stream gauge 14, namely low temperature keeps.
Thus, liquid filler without the need under the condition of manual operation, can be in good operating temperature situation always automatically.
Because cooler is only the lumen shape autonomous channel being wrapped in flowmeter outside, this passage has nothing to do with the feed flow and return gas channel relating to metering, therefore can not cause any loss to user benefit.
Claims (10)
1. one kind has the LNG filling measuring apparatus keeping function from pre-cold-peace low temperature, it is characterized in that, comprising: be arranged at LNG between LNG delivery source and LNG air return end carry main line, conveying branch road and be arranged in series control valve on conveying branch road successively, flowmeter is heat sink room and check valve.
2. LNG filling measuring apparatus according to claim 1, it is characterized in that, described control valve is connected with the temperature transducer being arranged at liquid phase stream gauge outlet end, exports control command conducting control valve and open conveying branch road when the temperature that temperature transducer detects exceedes threshold range.
3. LNG according to claim 1 annotates measuring apparatus, it is characterized in that, described control valve realizes the unlatching of conveying branch road, closedown and flow control according to control command.
4. LNG according to claim 1 annotates measuring apparatus, and it is characterized in that, described check valve is one-way conduction, conducting direction be LNG delivery source to LNG air return end, in case non-return gas pours in down a chimney.
5. LNG filling measuring apparatus according to claim 1, it is characterized in that, described LNG carries main line to comprise: the described liquid phase stream gauge be arranged in series successively, clearing metering valve, LNG receive storage tank and vapor phase stream gauge, wherein: the entry end of liquid phase stream gauge is all connected with LNG delivery source with described conveying branch road, the air outlet that entry end and the LNG of vapor phase stream gauge receive storage tank is connected, and outlet end is all connected with LNG air return end with described conveying branch road.
6. LNG filling measuring apparatus according to claim 1, it is characterized in that, described liquid phase stream gauge and heat sink room are integrated, and this is heat sink, and room is be coated on the heat sink housing on liquid phase stream gauge.
7. LNG according to claim 6 annotates measuring apparatus, it is characterized in that, described heat sink housing is spherical, polyhedron or drum organization, and housing is provided with heat sink inlet, heat sink export mouth.
8. LNG according to claim 7 annotates measuring apparatus, it is characterized in that, the position of described heat sink inlet is lower than the level height of heat sink export mouth.
9. LNG filling measuring apparatus according to claim 6, it is characterized in that, the vibration measurement pipe outside of described liquid phase stream gauge is provided with vacuum chamber, and this vacuum chamber and described heat sink housing are for being tightly connected.
10. the LNG filling measuring apparatus according to claim 6 or 7 or 9, it is characterized in that, described heat sink housing inside is provided with guide plate, and this guide plate adopts C character form structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520122766.7U CN204494075U (en) | 2015-03-03 | 2015-03-03 | There is the LNG filling measuring apparatus keeping function from pre-cold-peace low temperature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520122766.7U CN204494075U (en) | 2015-03-03 | 2015-03-03 | There is the LNG filling measuring apparatus keeping function from pre-cold-peace low temperature |
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| CN204494075U true CN204494075U (en) | 2015-07-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116865A (en) * | 2015-09-09 | 2015-12-02 | 江苏德邦工程有限公司 | LNG (liquefied natural gas) filling station optimization control system |
| CN108426167A (en) * | 2018-05-09 | 2018-08-21 | 重庆厚海能源设备制造有限公司 | A kind of double metering filling machines based on single current gauge |
-
2015
- 2015-03-03 CN CN201520122766.7U patent/CN204494075U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116865A (en) * | 2015-09-09 | 2015-12-02 | 江苏德邦工程有限公司 | LNG (liquefied natural gas) filling station optimization control system |
| CN108426167A (en) * | 2018-05-09 | 2018-08-21 | 重庆厚海能源设备制造有限公司 | A kind of double metering filling machines based on single current gauge |
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