CN103604041A - Automatic liquefied-natural-gas electronic control pressurization system and method thereof - Google Patents
Automatic liquefied-natural-gas electronic control pressurization system and method thereof Download PDFInfo
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- CN103604041A CN103604041A CN201310414873.2A CN201310414873A CN103604041A CN 103604041 A CN103604041 A CN 103604041A CN 201310414873 A CN201310414873 A CN 201310414873A CN 103604041 A CN103604041 A CN 103604041A
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Abstract
The invention discloses an automatic liquefied-natural-gas electronic control pressurization system and a method thereof. A liquid storage tank is connected to a low-temperature electric pump through a pressure stop valve. The low-temperature electric pump is connected to an electric heating assembly. A pressure switch in the electric heating assembly is connected to a coil terminal of a preheat relay. A safety piece is connected to the input terminal of the preheat relay. The pressure switch and the safety piece are respectively connected to an external vehicle-mounted storage battery. The output terminals of the preheat relay is separately connected to a resistance wire in a preheat container and to a driving motor connected to the low-temperature electric pump. The resistance wire and the motor are in parallel connection. The preheat container in the electric heating assembly is connected to the liquid storage tank through a one-way valve. The system and the method can accelerate gasification of liquefied natural gas and pressurize the liquid storage tank rapidly, under a circumstance of not starting a machine, only by opening a key switch of the machine, and automatically opening and closing the pressure switch through the electric heating assembly and a preset pressure value, thus guaranteeing that the machine enters a working state rapidly. The system and the method have advantages of capability of being energy-saving, time-saving, safe and reliable, and capability of improving working efficiency, simple operation, and the like.
Description
Technical field
The present invention relates to a kind of gas gasification pressurized equipment and method of LNG Liquefied natural gas loader.
Background technique
Rock gas is as a kind of novel energy, the wide fields such as public transport, goods vehicle that are applied to of model, and along with country is to the utilization of clean energy resource and subtract to reduce discharging and put more effort, LNG Liquefied natural gas has also been brought into play its irreplaceable effect in engineering machinery field.
The combustion gas forced feed of LNG Liquefied natural gas loader at present still adopts traditional liquid container from supercharging technology, it is exactly the low temperature liquid rock gas in liquid container, by cryogenic globe valve, pressure charging valve, the spiral fin coil of liquid container, after gasification, enter again liquid container, to improve liquid container fuel pressure, but this liquid container self-supercharging device can bring problems: 1. pressurization time is long.Specifically be exactly, when liquid container has just filled complete, machine can not shovel dress work at once, because now the pressure in liquid container only has 5-7bar, and the normal operating pressure of machinery requirement is more than 11bar, this just need to start a machine, by above-mentioned self-supercharging device, make more than pressure in liquid container is established to 11bar, this process is also wanted 1-1.5 hour.2. reduce the working efficiency of machine.Specifically be exactly; loader in normal shovel process of assembling, need liquid container in pressure stability at 11bar; actual be full of liquid container or in the continuously large load operation of machine; be difficult to pressure in liquid container continually and steadily more than 11bar; cause machine to shut down midway; will affect the working efficiency of machine, to user, bring loss economically.
Summary of the invention
The object of this invention is to provide a kind of acceleration liquefied natural gas gasifying, give liquid container Quick-pressing, ensure machine enter fast working state and have energy-conservation, save time, increase work efficiency, the automatically controlled Self-pressurizing agri system of LNG Liquefied natural gas and method thereof safe and reliable, easy and simple to handle.
The equipment scheme that solves its technical problem is: liquid container connects low temperature motor-drive pump by pressure shut-off valve, low temperature motor-drive pump connects electric heating assembly, electric heating assembly comprises drive motor, safety plate, preheating relay, pressure switch, preheating container, pressure switch in electric heating assembly connects the coil-end of preheating relay, safety plate connects the input end of preheating relay, pressure switch and safety plate be external vehicular power-bottle respectively, the output terminal of preheating relay connects respectively the resistance wire and the drive motor being connected with low temperature motor-drive pump in preheating container, resistance wire and drive motor are in parallel, the preheating container of electric heating assembly is by one-way valve tieback liquid container.
Preheating container is the confined space that an inside is full of nitrogen, and resistance wire curl distributes, and radiating fin is plate aliform to be arranged wherein, and preheating container below connects low temperature motor-drive pump, preheating container top through one-way valve to connecing liquid container.
The technological scheme that solves its technical problem employing is: the cut-out pressure that pressure shut-off valve is set is 11bar, when liquid container internal pressure surpasses 11bar, pressure shut-off valve cuts off this loop automatically, low temperature motor-drive pump quits work, preheating container quits work, engine work, when liquid container internal pressure is during lower than 11bar, pressure shut-off valve is connected, the electronic pump work of low temperature, LNG Liquefied natural gas is pumped in preheating container fast, in preheating container, make the flow velocity of LNG Liquefied natural gas slack-off, the radiating fin that plate aliform is arranged has simultaneously increased huge heat diffusion area, realize the Quick-pressing of liquid container, by pressure transducer, detect the pressure in liquid container, when pressure is during lower than 11bar, sensor is transferred to pressure switch by signal, this control loop energising, preheating relay is connected, now preheating relay is connected another work loop, in this loop, preheating relay is controlled the work of preheating container and drive motor, when pressure is during lower than 11bar, this loop energising, nitrogen in preheating container in Resistant heating container, thereby the LNG Liquefied natural gas of the preheating container that makes to flow through gasifies rapidly, drive motor cryopump work simultaneously, the thermal conductivity of nitrogen is 1.02, the capacity of heat transmission that has surpassed air, nitrogen communicates the temperature to radiating fin, thereby make the supercharging of liquid container fast and reliable.
Beneficial effect: in such scheme, native system and method can realize in the situation that not starting a machine, only need open the key operation of machine, by electric preheating assembly, and preset pressure value automatic opening-closing pressure switch, accelerate liquefied natural gas gasifying, give liquid container Quick-pressing, ensure that machine enters working state fast, have energy-conservation, save time, increase work efficiency, the advantage such as safe and reliable, easy and simple to handle.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
1 liquid container, 2 pressure shut-off valves, 3 low temperature motor-drive pumps, 4 preheating containers, 5 one-way valves, 6 safety plates, 7 preheating relays, 8 drive motors, 9 pressure switches, 10 resistance wires, 11 electric heating assemblies, 12 radiating fin in figure.
Embodiment: liquid container 1 connects low temperature motor-drive pump 3 by pressure shut-off valve 2, low temperature motor-drive pump 3 connects electric heating assembly 11, electric heating assembly 11 comprises drive motor 8, safety plate 6, preheating relay 7, pressure switch 9, preheating container 4, pressure switch 9 in electric heating assembly 11 connects the coil-end of preheating relay 7, safety plate 6 connects the input end of preheating relay 7, pressure switch 9 and safety plate 6 be external vehicular power-bottle respectively, the output terminal of preheating relay 7 connects respectively the resistance wire 10 and the drive motor 8 being connected with low temperature motor-drive pump 3 in preheating container 4, resistance wire 10 and drive motor 8 parallel connections, the preheating container 4 of electric heating assembly 11 is by one-way valve 5 tieback liquid containers 1.
Preheating container 4 is confined spaces that an inside is full of nitrogen, and resistance wire 10 curls distribute, and radiating fin 12 is plate aliform to be arranged wherein, and preheating container 4 belows connect low temperature motor-drive pump 3, preheating container 4 tops through one-way valve 5 to connecing liquid container 1.
This system is mainly by liquid container 1, pressure shut-off valve 2, low temperature motor-drive pump 3, electric heating assembly 11 and one-way valve 5 are formed by connecting, when liquid container 1 has just filled and closed, or due to the underpressure in the liquid container 1 causing after long-time use, do not reach the air inflow of engine work, can make car load be short of power, even can not start, for guaranteeing the normal operation of motor, the cut-out pressure that pressure shut-off valve 2 is set is 11bar, when liquid container 1 internal pressure surpasses 11bar, pressure shut-off valve 2 cuts off this loop automatically, simultaneously when liquid container 1 does not pressurize, tank internal pressure is too high, pressure shut-off valve 2 can prevent the impact of high-pressure liquefaction rock gas to low temperature motor-drive pump 3, play the protective action to low temperature motor-drive pump 3, for improving pressing speed, at the rear increase low temperature of pressure shut-off valve 2 motor-drive pump 3, increase the speed that LNG Liquefied natural gas enters into preheating container 4.When liquid container 1 internal pressure is during lower than 11bar, pressure shut-off valve 2 is connected, 3 work of low temperature motor-drive pump, LNG Liquefied natural gas is pumped in preheating container to 4 fast, preheating container 4 inside are comprised of compact arranged radiating fin 12, the out-of-date rapid change due to space of liquefied natural gas stream is large, make the flow velocity of LNG Liquefied natural gas slack-off, the radiating fin 12 that plate aliform is arranged has simultaneously increased huge heat diffusion area, realize the Quick-pressing of liquid container 1, for preventing that rock gas from flowing backwards, after preheating container 4 with between liquid container 1, by an one-way valve 5, be connected, guarantee that rock gas can only flow to liquid container 1 from preheating container 4, when liquid container 1 internal pressure surpasses 11bar, pressure shut-off valve 2 cut-off loops, low temperature motor-drive pump 3 quits work, preheating container 4 quits work, engine work.
Because directly heating rock gas, resistance wire 10 there is certain danger, resistance wire 10 in preheating container 4 passes through heated nitrogen, the heat of generation is transmitted to radiating fin 12, preheating container 4 consists of a confined space that is full of nitrogen, resistance wire 10 curls distribute wherein, radiating fin 12 is plate aliform and arranges, during energising, resistance wire 10 heated nitrogens, the thermal conductivity of nitrogen is 1.02, the capacity of heat transmission that has surpassed air, nitrogen communicates the temperature to radiating fin 12, thereby makes liquid container 1 fast and reliable supercharging.
As shown in Figure 1, liquid container 1 is communicated with pressure shut-off valve 2, for guaranteeing the required pressure of engine work, the cut-out pressure that pressure shut-off valve 2 is set is 11bar, and when liquid container 1 internal pressure is during higher than 11bar, pressure shut-off valve 2 cuts off these loops, when liquid container 1 pressure is during lower than 11bar, low temperature motor-drive pump 3 work that are communicated with pressure shut-off valve 2, are transported to LNG Liquefied natural gas in preheating container 4, realize the Quick-pressing to LNG Liquefied natural gas.For preventing that rock gas from flowing backwards, between electric heating assembly and LNG Liquefied natural gas liquid container, by one-way valve 5, be connected, thereby realize the Quick-pressing of liquid container 1.Electric heating assembly 11 is controlled the work of preheating container 4 by preheating relay 7, when liquid container 1 pressure is greater than 11bar, liquid container 1 pressure transducer own sends signal to pressure switch 9 in control loop, cuts off this loop.When liquid container 1 pressure is during lower than 11bar; preheating relay 7 energisings; make preheating container 4 energisings; resistance wire 10 heatings; temperature raises; the oil hydraulic motor 8 and preheating container 4 parallel connections that are connected with low temperature motor-drive pump 3 by the switching of preheating relay 7 control oil hydraulic motors 8, thereby are played the protective action of low temperature motor-drive pump 3 and the waste that reduces engine power simultaneously.Electric heating assembly 11 is directly connected with vehicular power-bottle by safety plate 6, without ato unit, just can complete the pressurization to liquid container 1, has improved operating efficiency simultaneously.
The confined space that preheating container 4 is full of nitrogen by an inside forms, resistance wire 10 curls distribute, radiating fin 12 is plate aliform and arranges wherein, for preventing that LNG Liquefied natural gas is because gravity cause flow is to liquid container 1, during connection, preheating container 4 belows connect low temperature motor-drive pump 3, and the rock gas after pressurization flows to liquid container 1 from preheating container 4 tops through one-way valve 5.
Claims (3)
1. the automatically controlled Self-pressurizing agri system of LNG Liquefied natural gas, it is characterized in that: liquid container connects low temperature motor-drive pump by pressure shut-off valve, low temperature motor-drive pump connects electric heating assembly, electric heating assembly comprises drive motor, safety plate, preheating relay, pressure switch, preheating container, pressure switch in electric heating assembly connects the coil-end of preheating relay, safety plate connects the input end of preheating relay, pressure switch and safety plate be external vehicular power-bottle respectively, the output terminal of preheating relay connects respectively the resistance wire and the drive motor being connected with low temperature motor-drive pump in preheating container, resistance wire and motor are in parallel, the total preheating container of electric heating passes through one-way valve tieback liquid container.
2. the automatically controlled Self-pressurizing agri system of a kind of LNG Liquefied natural gas according to claim 1, it is characterized in that: preheating container is the confined space that an inside is full of nitrogen, resistance wire curl distributes, radiating fin is plate aliform and arranges wherein, preheating container below connects low temperature motor-drive pump, preheating container top through one-way valve to connecing liquid container.
3. one kind is utilized claim 1 and the 2 automatically controlled Self-pressurizing agri methods of LNG Liquefied natural gas that realize, it is characterized in that: the cut-out pressure that pressure shut-off valve is set is 11bar, when liquid container internal pressure surpasses 11bar, pressure shut-off valve cuts off this loop automatically, low temperature motor-drive pump quits work, preheating container quits work, engine work, when liquid container internal pressure is during lower than 11bar, pressure shut-off valve is connected, the electronic pump work of low temperature, LNG Liquefied natural gas is pumped in preheating container fast, in preheating container, make the flow velocity of LNG Liquefied natural gas slack-off, the radiating fin that plate aliform is arranged has simultaneously increased huge heat diffusion area, realize the Quick-pressing of liquid container, by pressure transducer, detect the pressure in liquid container, when pressure is during lower than 11bar, sensor is transferred to pressure switch by signal, this control loop energising, preheating relay is connected, now preheating relay is connected another work loop, in this loop, preheating relay is controlled the work of preheating container and drive motor, when pressure is during lower than 11bar, this loop energising, nitrogen in preheating container in Resistant heating container, thereby the LNG Liquefied natural gas of the preheating container that makes to flow through gasifies rapidly, drive motor cryopump work simultaneously, the thermal conductivity of nitrogen is 1.02, the capacity of heat transmission that has surpassed air, nitrogen communicates the temperature to radiating fin, thereby make the supercharging of liquid container fast and reliable.
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| CN201310414873.2A CN103604041B (en) | 2013-09-13 | 2013-09-13 | Automatic liquefied-natural-gaelectronic electronic control pressurization system and method thereof |
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| CN201310414873.2A CN103604041B (en) | 2013-09-13 | 2013-09-13 | Automatic liquefied-natural-gaelectronic electronic control pressurization system and method thereof |
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| CN103604041B CN103604041B (en) | 2015-12-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361356A (en) * | 2020-09-30 | 2021-02-12 | 中国船舶重工集团公司第七0四研究所 | Dry-type thermal oxidation discharging equipment of natural gas |
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| CN102207244A (en) * | 2011-05-13 | 2011-10-05 | 天津华迈燃气装备股份有限公司 | Skid-mounted-type liquefied natural gas filling device for automobiles |
| CN203463935U (en) * | 2013-09-13 | 2014-03-05 | 徐工集团工程机械股份有限公司科技分公司 | Electric control automatic pressurization system of liquefied natural gas |
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2013
- 2013-09-13 CN CN201310414873.2A patent/CN103604041B/en active Active
Patent Citations (6)
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| CN1763417A (en) * | 2005-10-19 | 2006-04-26 | 马磊 | Liquefied natural gas charging device with automatic pressure regulation and gasification functions |
| CN201034242Y (en) * | 2007-05-16 | 2008-03-12 | 马磊 | Energy-saving liquefied natural gas automatically gasifying and aerating means |
| WO2010096903A1 (en) * | 2009-02-26 | 2010-09-02 | Westport Power Inc. | Pressure control system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112361356A (en) * | 2020-09-30 | 2021-02-12 | 中国船舶重工集团公司第七0四研究所 | Dry-type thermal oxidation discharging equipment of natural gas |
| CN112361356B (en) * | 2020-09-30 | 2023-06-02 | 中国船舶重工集团公司第七0四研究所 | Natural gas dry-type thermal oxidation discharging equipment |
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| CN103604041B (en) | 2015-12-23 |
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