CN103343884B - Liquid helium conveying system used for large-size multi-section liquid helium heat sinks and class converting method for large-size multi-section liquid helium heat sinks - Google Patents
Liquid helium conveying system used for large-size multi-section liquid helium heat sinks and class converting method for large-size multi-section liquid helium heat sinks Download PDFInfo
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- CN103343884B CN103343884B CN201310242837.2A CN201310242837A CN103343884B CN 103343884 B CN103343884 B CN 103343884B CN 201310242837 A CN201310242837 A CN 201310242837A CN 103343884 B CN103343884 B CN 103343884B
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Abstract
The invention provides a liquid helium conveying system used for large-size multi-section liquid helium heat sinks and a class converting method for converting liquid nitrogen to liquid helium of the liquid helium heat sinks on the basis of the liquid helium conveying system. The liquid helium conveying system and the method are applied to an engine vacuum plume experimental study. The liquid helium conveying system comprises a heat sink system, a liquid nitrogen supplying system, a liquid helium supplying system, a nitrogen supplying system and a helium supplying system. The heat sink system comprises five large-size liquid helium heat sinks and four liquid nitrogen heat sinks. The liquid nitrogen supplying system is provided with conveying pipelines for the liquid helium heat sinks and the liquid nitrogen heat sinks, and provided with a liquid nitrogen cooling box and a liquid helium cooling box, wherein the liquid nitrogen cooling box and the liquid helium cooling box are used for centrally containing and managing liquid nitrogen adjusting valves and liquid helium adjusting valves. According to the liquid helium conveying system used for the large-size multi-section liquid helium heat sinks and the class converting method for the large-size multi-section liquid helium heat sinks, liquid helium refrigeration can be provided for the large-size multi-section liquid helium heat sinks at the same time, unified liquid supplying is achieved for all the heat sinks, operation is convenient, cost is saved, floor space is small, the valves can be centrally controlled conveniently, working efficiency is improved, and operation and maintenance are convenient.
Description
Technical field
The invention belongs to vacuum science technical field, the present invention relates to a kind of liquid helium induction system heat sink for large scale more piece liquid helium and the heat sink method being turned level by liquid nitrogen to liquid helium of liquid helium, be applied in the research of engine vacuum plume testing.
Background technology
Vacuum Plume effect test system is mainly used in space flight appearance, control thruster plume experimental study, simulation test can be carried out to the Vacuum Plume effect of electric propulsion engine or chemical propulsion engine, in order to the duty of effective simulated engine in vacuum cryogenic environment, very harsh to indoor environment vacuum requirement during engine plume test, as the environment vacuum degree (1.0E-6Pa) of extremely low background ambient temperature (subzero less than 260 degree), superelevation.For meeting the test demand of above-mentioned vacuum deep cooling, need in cabin, arrange that a large amount of liquid helium is heat sink, pass into ultralow temperature liquid helium refrigeration toward liquid helium is heat sink, this just needs configuration to meet the liquid helium induction system of plume testing demand simultaneously.
The Main Function of liquid helium induction system is for the heat sink liquid helium that provides of liquid helium in cabin freezes, make liquid helium heat sink temperature lower than 10K and keep liquid helium heat sink temperature even, for adsorbing the gas that in cabin, liquid nitrogen heat sink cannot adsorb, keep high vacuum tightness and extremely low low temperature environment in cabin, plume real space environment when working for simulated engine.
At present, except Vacuum Plume effect test system, the domestic large-scale vacuum environmental-test facility not also being specifically designed to research engine plume test, and traditional low temperature simulation all realizes by liquid nitrogen refrigerating, minimum temperature can only reach liquid nitrogen temperature (77K), engine plume gas (nitrogen, oxygen, hydrogen etc.) cannot be adsorbed, also just cannot ensure high environment vacuum degree.
Summary of the invention
In order to solve the problem, the present invention proposes a kind of liquid helium induction system heat sink for large scale more piece liquid helium and turns level method, the demand to environment vacuum when solving engine plume test.
A kind of liquid helium induction system heat sink for large scale more piece liquid helium provided by the invention, comprising: heat-sink system, liquid nitrogen supply system, nitrogen supply (NS) system, helium supply system and liquid helium supply system.
Heat-sink system comprises that gate liquid helium is heat sink, body anterior liquid helium in cabin is heat sink, body rear portion, cabin liquid helium is heat sink, end socket liquid helium is heat sink, plume adsorption pump, gate liquid nitrogen heat sink, cabin body anterior liquid nitrogen heat sink, cabin body rear portion liquid nitrogen heat sink and end socket liquid nitrogen heat sink; Gate liquid nitrogen heat sink, gate liquid helium is heat sink, cabin body anterior liquid nitrogen heat sink, body rear portion, cabin liquid nitrogen heat sink, end socket liquid helium is heat sink arranges from front to back successively with end socket liquid nitrogen heat sink; Body anterior liquid helium in cabin is heat sink is arranged on the anterior liquid nitrogen heat sink inside of cabin body, and body rear portion, cabin liquid helium is heat sink is arranged on liquid nitrogen heat sink inside, body rear portion, cabin; Plume adsorption pump is arranged on the heat sink inside of liquid helium, body rear portion, cabin, is used for adsorbing plume gas.
Liquid nitrogen supply system comprises the liquid nitrogen transfusion system providing liquid nitrogen refrigerating to liquid nitrogen heat sink, and the initial stage provides the liquid nitrogen transfusion system of Liquid nitrogen precooler to the heat sink and plume adsorption pump of liquid helium.
The liquid nitrogen transfusion system of Liquid nitrogen precooler is provided to comprise to liquid helium is heat sink with plume adsorption pump: liquid nitrogen storage A, the first liquid nitrogen variable valve, the second liquid nitrogen variable valve, the 3rd liquid nitrogen variable valve, the 4th liquid nitrogen variable valve, the 5th liquid nitrogen variable valve and connecting line.First liquid nitrogen variable valve, the second liquid nitrogen variable valve, the 3rd liquid nitrogen variable valve, the 4th liquid nitrogen variable valve and the 5th liquid nitrogen variable valve are integrated in liquid nitrogen ice chest, and liquid nitrogen cold box interior adopts pearlite thermal insulation.Liquid nitrogen storage A is by triplate line parallel join first liquid nitrogen variable valve, second liquid nitrogen variable valve, 3rd liquid nitrogen variable valve, 4th liquid nitrogen variable valve and the 5th liquid nitrogen variable valve, first liquid nitrogen variable valve is connected by the final entrance heat sink with gate liquid helium of pipeline, second liquid nitrogen variable valve is connected by the pipeline entrance that finally liquid helium anterior with cabin body is heat sink, 3rd liquid nitrogen variable valve is connected by the final entrance heat sink with body rear portion, cabin liquid helium of pipeline, 4th liquid nitrogen variable valve is connected by the final entrance heat sink with end socket liquid helium of pipeline, 5th liquid nitrogen variable valve is finally connected with the entrance of plume adsorption pump by pipeline.
The liquid nitrogen transfusion system of liquid nitrogen refrigerating is provided to comprise liquid nitrogen storage B, the first liquid nitrogen hand valve, the second liquid nitrogen hand valve, the 3rd liquid nitrogen hand valve, the 4th liquid nitrogen hand valve and connecting line to liquid nitrogen heat sink, liquid nitrogen storage B passes on left pipeline and connects the first liquid nitrogen hand valve, is finally connected with the entrance of gate liquid nitrogen heat sink; By triplate line parallel join second liquid nitrogen hand valve, the 3rd liquid nitrogen hand valve and the 4th liquid nitrogen hand valve on the right side of liquid nitrogen storage B, second liquid nitrogen hand valve is finally connected with the entrance of cabin body front portion liquid nitrogen heat sink by pipeline, 3rd liquid nitrogen hand valve is finally connected with the entrance of body rear portion, cabin liquid nitrogen heat sink by pipeline, and the 4th liquid nitrogen hand valve is finally connected with the entrance of end socket liquid nitrogen heat sink by pipeline.
Liquid helium supply system is freezed to the heat sink liquid helium that provides of liquid helium, comprises liquid helium tank car, the first liquid helium hand valve, the first liquid helium variable valve, the second liquid helium variable valve, the 3rd liquid helium variable valve, the 4th liquid helium variable valve, the 5th liquid helium variable valve and connecting line.First liquid helium variable valve, the second liquid helium variable valve, the 3rd liquid helium variable valve, the 4th liquid helium variable valve and the 5th liquid helium variable valve are integrated in liquid helium ice chest, and liquid helium ice chest outer wall adopts double-layer stainless steel, and centre vacuumizes.Liquid helium tank car is by the first liquid helium hand valve parallel join first liquid helium variable valve, the second liquid helium variable valve, the 3rd liquid helium variable valve, the 4th liquid helium variable valve and the 5th liquid helium variable valve respectively.First liquid helium variable valve is connected by the final entrance heat sink with gate liquid helium of pipeline, second liquid helium variable valve is connected by the pipeline entrance that finally liquid helium anterior with cabin body is heat sink, 3rd liquid helium variable valve is connected by the final entrance heat sink with body rear portion, cabin liquid helium of pipeline, 4th liquid helium variable valve is connected by the final entrance heat sink with end socket liquid helium of pipeline, and the 5th liquid helium variable valve is finally connected with the entrance of plume adsorption pump by pipeline.First liquid helium hand valve is for controlling the liquid outlet quantity of liquid helium tank car.
Nitrogen supply (NS) system is used for providing nitrogen to liquid helium is heat sink with liquid helium ice chest, is purged by the liquid nitrogen in heat sink for liquid helium and liquid helium ice chest clean, comprise nitrogen pot, nitrogen hand valve, safety valve, the second liquid helium hand valve and connecting line when turning level.Nitrogen pot connects nitrogen hand valve and the second liquid helium hand valve successively by pipeline, and is finally connected to the porch of five liquid helium variable valve in liquid helium ice chest; Safety valve is arranged on the second liquid helium hand valve outlet port place, for preventing system pressure too high; Nitrogen hand valve is for controlling nitrogen amount size.
Helium supply system is used for providing helium to liquid helium is heat sink with liquid helium ice chest, and purged by the nitrogen in heat sink for liquid helium and liquid helium ice chest clean when turning level, helium supply system comprises helium tank, helium hand valve and connecting line.Helium tank connects helium hand valve by pipeline, and is finally connected to the second liquid helium hand valve inlet place.
Liquid helium ice chest is provided with the first rapid slot A, the second rapid slot A, the 3rd rapid slot A, the 4th rapid slot A, the 5th rapid slot A, the 6th rapid slot A, the first rapid slot B, the second rapid slot B, the 3rd rapid slot B, the 4th rapid slot B and the 5th rapid slot B, for the fast insert-pull of pipeline.
The first movable woven hose, the second movable woven hose, the 3rd movable woven hose, the 4th movable woven hose, the 5th movable woven hose, the 6th movable woven hose and the 7th movable woven hose is also provided with in liquid helium induction system.First movable woven hose, the second movable woven hose, the 3rd movable woven hose, the 4th movable woven hose, the 6th movable woven hose and the 7th movable woven hose all adopt hose connecting structure, and two ends are Bayonet male joint.First movable woven hose is for connecting the 3rd rapid slot B and body rear portion, cabin liquid helium is heat sink; Second movable woven hose is for connecting the 5th rapid slot B and plume adsorption pump; 3rd movable woven hose for connect the 4th rapid slot B and end socket liquid helium heat sink; 4th movable woven hose is heat sink for connecting the anterior liquid helium of the second rapid slot B and cabin body; 5th movable woven hose adopts hard tube syndeton, and one end is Bayonet male joint, and the other end is Bayonet female joint, is connected with the 6th movable woven hose, for connect the first rapid slot B and gate liquid helium heat sink.7th movable woven hose is for connecting liquid helium tank car and the 6th rapid slot A.
Based on above-mentioned a kind of liquid helium induction system heat sink for large scale more piece liquid helium, to liquid helium heat sink pass into liquid helium refrigeration before, need liquid helium is heat sink in liquid nitrogen get rid of clean, otherwise liquid helium can be frozen blocking pipeline by liquid helium, the method that liquid helium of the present invention is heat sink turns level by liquid nitrogen to liquid helium specifically comprises following step:
Step one: liquid nitrogen residual during liquid helium is heat sink blows down;
Open nitrogen hand valve, the second liquid helium hand valve, the first liquid helium variable valve, the second liquid helium variable valve, the 3rd liquid helium variable valve, the 4th liquid helium variable valve and the 5th liquid helium variable valve successively, heat sink to five liquid heliums: gate liquid helium is heat sink, body anterior liquid helium in cabin is heat sink, body rear portion, cabin liquid helium is heat sink, end socket liquid helium is heat sink and plume adsorption pump, pass into nitrogen, liquid nitrogen is blown down from the heat sink top of liquid helium, till observing and not having liquid nitrogen to discharge;
Step 2: nitrogen blow-off residual during liquid helium is heat sink;
Open helium hand valve, pass into helium to five liquid heliums are heat sink, nitrogen is blown down from the heat sink top of liquid helium, repeatedly purges three times, each 10 minutes, by the helium hand valve control time;
Step 3: by liquid nitrogen residual in liquid helium ice chest or nitrogen blow-off;
First rapid slot A, the second rapid slot A, the 3rd rapid slot A, the 4th rapid slot A and the 5th rapid slot A are extracted from liquid helium ice chest; Open helium hand valve, in liquid helium ice chest, pass into helium, the liquid nitrogen accumulated or nitrogen are blown down from liquid helium ice chest, repeatedly purges three times, each 3 minutes, by the helium hand valve control time; After purging, again by the first rapid slot A, the second rapid slot A, the 3rd rapid slot A, the 4th rapid slot A and the 5th rapid slot A quick insertion liquid helium ice chest;
Step 4: the liquid helium refrigeration that liquid helium is heat sink;
Open the first liquid helium hand valve, the first liquid helium variable valve, the second liquid helium variable valve, the 3rd liquid helium variable valve, the 4th liquid helium variable valve and the 5th liquid helium variable valve successively, pass into liquid helium refrigeration to liquid helium is heat sink, the large I of aperture of the first liquid helium variable valve, the second liquid helium variable valve, the 3rd liquid helium variable valve, the 4th liquid helium variable valve and the 5th liquid helium variable valve regulates according to the temperature that each liquid helium is heat sink.
Advantage and the good effect of liquid helium induction system of the present invention and method are:
1, can simultaneously for large scale, more piece liquid helium is heat sink provides liquid helium to freeze;
2, the heat sink size of liquid helium of the present invention is large, and liquid helium demand is large, and small-sized liquid helium Dewar should not be adopted to supply liquid helium, and directly adopt the supply of liquid helium tank car, consumption is sufficient, avoids and cause test failure because of liquid helium quantity not sufficient in process of the test; And adopting tank car directly to supply, liquid-supplying system pipeline is simple, the heat sink unified feed flow of each joint, easy to operate, avoiding the trouble needing frequently to change Dewar because adopting small-sized liquid helium Dewar (volume 500L), having saved expense;
3, each joint liquid helium heat sink inlet is provided with flow control valve, and the liquid helium uninterrupted entering each joint liquid helium heat sink is controlled; And be provided with liquid nitrogen source, liquid helium source, the gentle helium source of gas nitrogenous source, be convenient to the heat sink precooling of liquid helium and change working;
4, special liquid nitrogen ice chest is provided with, concentrate in liquid nitrogen ice chest by all liquid nitrogen valves at liquid helium heat sink inlet place, liquid nitrogen ice chest adopts the manufacture of individual layer corrosion resistant plate, inner employing pearlite thermal insulation, adopt pearlite thermal insulation, be applicable to liquid nitrogen temperature, cheap, do not need to carry out Cryo Heat Insulation parcel separately to above-mentioned liquid nitrogen valve, floor area is little, be convenient to valve centralized control, increase work efficiency, handled easily and maintenance;
5, special liquid helium ice chest is provided with, concentrate in liquid helium ice chest by all liquid helium valves at liquid helium heat sink inlet place, liquid helium ice chest adopts double-layer vacuum Dewar form, specifically double-deck stainless steel, centre vacuumizes, this structure is only applicable to liquid helium region, does not therefore need to carry out Cryo Heat Insulation parcel separately to liquid helium valve, and reduces cold damage to greatest extent, floor area is little, be convenient to valve centralized control, increase work efficiency, handled easily and maintenance;
6, because liquid helium easily damages liquid nitrogen valve, liquid helium valve is expensive simultaneously, and the present invention is provided with plug type corrugated flexible hose, can realize fast insert-pull, and be convenient to pipeline quick links, working mode change is very convenient, and has saved expense;
7, liquid helium induction system of the present invention, principle of work is clear, easy to operate, cheap, and mode conversion efficiency is high, avoids the heat sink middle liquid nitrogen frozen block phenomenon of liquid helium, fully ensure that the heat sink temperature homogeneity worked under liquid helium region of liquid helium.
Accompanying drawing explanation
Fig. 1 is a kind of liquid helium induction system structural representation heat sink for large scale more piece liquid helium provided by the invention;
To be liquid helium induction system of the present invention carrying out liquid nitrogen and to turn to liquid helium the process flow diagram of level to Fig. 2.
In figure:
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 1, be a kind of liquid helium induction system heat sink for large scale more piece liquid helium provided by the invention, mainly comprise: heat-sink system, liquid nitrogen supply system, nitrogen supply (NS) system, helium supply system and liquid helium supply system.
Heat-sink system comprises that gate liquid helium is heat sink 101, body anterior liquid helium in cabin is heat sink 102, body rear portion, cabin liquid helium is heat sink 103, end socket liquid helium is heat sink 104, plume adsorption pump 105, gate liquid nitrogen heat sink 106, cabin body anterior liquid nitrogen heat sink 107, body rear portion, cabin liquid nitrogen heat sink 108, end socket liquid nitrogen heat sink 109.Gate liquid nitrogen heat sink 106, gate liquid helium is heat sink 101, the anterior liquid nitrogen heat sink 107 of cabin body, body rear portion, cabin liquid nitrogen heat sink 108 and end socket liquid helium are heat sink 104, end socket liquid nitrogen heat sink 109 is arranged successively from front to back.Body anterior liquid helium heat sink 102 in cabin is arranged on the inside of the anterior liquid nitrogen heat sink 107 of cabin body, and body rear portion, cabin liquid helium heat sink 103 is arranged on the inside of body rear portion, cabin liquid nitrogen heat sink 108.Plume adsorption pump 105 is arranged on the inside of body rear portion, cabin liquid helium heat sink 103, is used for adsorbing plume gas.
Gate liquid helium is heat sink 101 and gate liquid nitrogen heat sink 106 are the heat sink and liquid nitrogen heat sinks of the liquid helium installed on body gate, cabin, with gate switch, install circular dull and stereotyped heat sink on such as inside butterfly gate.
Liquid nitrogen supply system is mainly used in providing liquid nitrogen refrigerating to liquid nitrogen heat sink, and the initial stage is heat sink to liquid helium, plume adsorption pump provides Liquid nitrogen precooler.Liquid nitrogen supply system comprises: provide the liquid nitrogen transfusion system of liquid nitrogen refrigerating to liquid nitrogen heat sink and provide the liquid nitrogen transfusion system of Liquid nitrogen precooler to the heat sink and plume adsorption pump of liquid helium.
The liquid nitrogen transfusion system of liquid nitrogen refrigerating is provided to comprise liquid nitrogen storage B111, the first liquid nitrogen hand valve V1121, the second liquid nitrogen hand valve V1122, the 3rd liquid nitrogen hand valve V1123, the 4th liquid nitrogen hand valve V1124 and connecting line thereof to liquid nitrogen heat sink.Liquid nitrogen storage B111 passes on left pipeline and connects the first liquid nitrogen hand valve V1121, is finally connected with the entrance of gate liquid nitrogen heat sink 106, for providing liquid nitrogen refrigerating separately to gate liquid nitrogen heat sink 106 and controlling liquid nitrogen flow; By triplate line parallel join second liquid nitrogen hand valve V1122, the 3rd liquid nitrogen hand valve V1123 and the 4th liquid nitrogen hand valve V1124 on the right side of liquid nitrogen storage B111, second liquid nitrogen hand valve V1122 is connected by the entrance of the anterior liquid nitrogen heat sink 107 of pipeline and cabin body, and the second liquid nitrogen hand valve V1122 is used for providing liquid nitrogen refrigerating separately to the anterior liquid nitrogen heat sink 107 of cabin body and controlling liquid nitrogen flow.3rd liquid nitrogen hand valve V1123 is connected by the entrance of pipeline with body rear portion, cabin liquid nitrogen heat sink 108, and the 3rd liquid nitrogen hand valve V1123 is used for providing liquid nitrogen refrigerating separately to body rear portion, cabin liquid nitrogen heat sink 108 and controlling liquid nitrogen flow.4th liquid nitrogen hand valve V1124 is connected by the entrance of pipeline with end socket liquid nitrogen heat sink 109, and the 4th liquid nitrogen hand valve V1124 is used for providing liquid nitrogen refrigerating separately to end socket liquid nitrogen heat sink 109 and controlling liquid nitrogen flow.In Fig. 1, DN20, DN40, DN25, DN10 and DN8 represent the length of the nominal diameter of junction pipe respectively, and unit is mm, and such as DN20 represents nominal diameter 20mm, and DN represents nominal diameter 40mm.
The liquid nitrogen transfusion system of Liquid nitrogen precooler is provided for and plume adsorption pump heat sink to liquid helium, comprises: liquid nitrogen storage A110, the first liquid nitrogen variable valve V3204, the second liquid nitrogen variable valve V3205, the 3rd liquid nitrogen variable valve V3206, the 4th liquid nitrogen variable valve V3207, the 5th liquid nitrogen variable valve V3208 and place connecting line thereof.Wherein the first liquid nitrogen variable valve V3204, the second liquid nitrogen variable valve V3205, the 3rd liquid nitrogen variable valve V3206, the 4th liquid nitrogen variable valve V3207 and the 5th liquid nitrogen variable valve V3208 are integrated in liquid nitrogen ice chest 113, floor area is little, easy to operate, be convenient to centralized management.Liquid nitrogen ice chest 113 inside adopts pearlite thermal insulation.
Liquid nitrogen storage A110 is by triplate line parallel join first liquid nitrogen variable valve V3204, the second liquid nitrogen variable valve V3205, the 3rd liquid nitrogen variable valve V3206, the 4th liquid nitrogen variable valve V3207 and the 5th liquid nitrogen variable valve V3208.First liquid nitrogen variable valve V3204 is finally connected with the entrance of gate liquid helium heat sink 101 by pipeline, second liquid nitrogen variable valve V3205 is finally connected with the entrance of cabin body front portion liquid helium heat sink 102 by pipeline, 3rd liquid nitrogen variable valve V3206 is finally connected with the entrance of body rear portion, cabin liquid helium heat sink 103 by pipeline, 4th liquid nitrogen variable valve V3207 is finally connected with the entrance of end socket liquid helium heat sink 104 by pipeline, and the 5th liquid nitrogen variable valve V3208 is finally connected with the entrance of plume adsorption pump 105 by pipeline.First liquid nitrogen variable valve V3204 is used for controlling to provide separately Liquid nitrogen precooler to gate liquid helium heat sink 101 and regulate liquid nitrogen flow, second liquid nitrogen variable valve V3205 is used for controlling provide separately Liquid nitrogen precooler to the anterior liquid helium heat sink 102 of cabin body and regulate liquid nitrogen flow, 3rd liquid nitrogen variable valve V3206 is used for controlling to provide separately Liquid nitrogen precooler to body rear portion, cabin liquid helium heat sink 103 and regulate liquid nitrogen flow, 4th liquid nitrogen variable valve V3207 is used for controlling to provide separately Liquid nitrogen precooler to end socket liquid helium heat sink 104 and regulate liquid nitrogen flow, 5th liquid nitrogen variable valve V3208 is used for controlling to provide separately Liquid nitrogen precooler to plume adsorption pump 105 and regulate liquid nitrogen flow.
Liquid helium supply system is mainly used in freezing to the heat sink liquid helium that provides of liquid helium, comprises liquid helium tank car 112, first liquid helium hand valve V3152, the first liquid helium variable valve V3254, the second liquid helium variable valve V3255, the 3rd liquid helium variable valve V3256, the 4th liquid helium variable valve V3257, the 5th liquid helium variable valve V3258 and connecting line thereof.Wherein, first liquid helium variable valve V3254, the second liquid helium variable valve V3255, the 3rd liquid helium variable valve V3256, the 4th liquid helium variable valve V3257 and the 5th liquid helium variable valve V3258 are integrated in liquid helium ice chest 114, floor area is little, easy to operate, is convenient to centralized management.
Liquid helium tank car 112 by the first liquid helium hand valve V3152 respectively parallel join have the first liquid helium variable valve V3254, the second liquid helium variable valve V3255, the 3rd liquid helium variable valve V3256, the 4th liquid helium variable valve V3257 and the 5th liquid helium variable valve V3258.First liquid helium variable valve V3254 is finally connected with the entrance of gate liquid helium heat sink 101 by pipeline, second liquid helium variable valve V3255 is finally connected with the entrance of cabin body front portion liquid helium heat sink 102 by pipeline, 3rd liquid helium variable valve V3256 is finally connected with the entrance of body rear portion, cabin liquid helium heat sink 103 by pipeline, 4th liquid helium variable valve V3257 is finally connected with the entrance of end socket liquid helium heat sink 104 by pipeline, and the 5th liquid helium variable valve V3258 is finally connected with the entrance of plume adsorption pump 105 by pipeline.First liquid helium variable valve V3254 is used for providing separately liquid helium freeze and control liquid helium flow to gate liquid helium heat sink 101, second liquid helium variable valve V3255 is used for providing separately liquid helium freeze and control liquid helium flow to the anterior liquid helium heat sink 102 of cabin body, 3rd liquid helium variable valve V3256 is used for providing separately liquid helium freeze and control liquid helium flow to body rear portion, cabin liquid helium heat sink 103, 4th liquid helium variable valve V3257 is used for providing separately liquid helium freeze and control liquid helium flow to end socket liquid helium heat sink 104, 5th liquid helium variable valve V3258 is used for providing separately liquid helium freeze and control liquid helium stream to plume adsorption pump 105.Liquid helium adopts liquid helium tank car 112 directly to supply, and achieves the heat sink unified feed flow of each joint, easy to operate, avoids the trouble needing frequently to change Dewar because adopting small-sized liquid helium Dewar (such as volume 500L).First liquid helium hand valve V3152 is for controlling the liquid outlet quantity of liquid helium tank car 112.
Nitrogen supply (NS) system is mainly used in providing nitrogen to liquid helium is heat sink with liquid helium ice chest, is purged by the liquid nitrogen in heat sink for liquid helium and liquid helium ice chest clean when turning level.Nitrogen supply (NS) system comprises nitrogen pot 115, nitrogen hand valve V3159, safety valve V3051, the second liquid helium hand valve V3153 and connecting line thereof.Nitrogen pot 115 connects nitrogen hand valve V3159 and the second liquid helium hand valve V3153 successively by pipeline, and is finally connected to the porch of the 5th liquid helium variable valve V3258 being positioned at valve box of liquid helium 114.Safety valve V3051 is arranged on the second liquid helium hand valve V3153 exit, for preventing system pressure too high.Nitrogen hand valve V3159 is for controlling nitrogen amount size.
Helium supply system is mainly used in providing helium to liquid helium is heat sink with liquid helium ice chest, is purged by the nitrogen in heat sink for liquid helium and liquid helium ice chest clean when turning level.Helium supply system comprises helium tank 116, helium hand valve V3160 and connecting line.Helium tank 116 connects helium hand valve V3160 by pipeline, and is finally connected to the second liquid helium hand valve V3153 porch.Helium system and nitrogen system share the second liquid helium hand valve V3153 and place pipeline thereof, decrease valve quantity and length of pipe, easy to operate, reduction of expenditure.
Liquid helium ice chest 114 is provided with the first rapid slot A204, the second rapid slot A205, the 3rd rapid slot A206, the 4th rapid slot A207, the 5th rapid slot A208, the 6th rapid slot A209, the first rapid slot B304, the second rapid slot B305, the 3rd rapid slot B306, the 4th rapid slot B307 and the 5th rapid slot B308, for the fast insert-pull of pipeline, convenient operation and maintenance.Liquid helium ice chest 114 outer wall adopts double-layer stainless steel, and centre vacuumizes, soaking cold insulation better effects if.
Between first rapid slot A204 and the first rapid slot B304, between the second rapid slot A205 and the second rapid slot B305, between the 3rd rapid slot A206 and the 3rd rapid slot B306, between the 4th rapid slot A207 and the 4th rapid slot B307 and between the 5th rapid slot A208 and the 5th rapid slot B308, be all provided with direct pipeline and connect.One end of first liquid helium variable valve V3254, the second liquid helium variable valve V3255, the 3rd liquid helium variable valve V3256, the 4th liquid helium variable valve V3257 and the 5th liquid helium variable valve V3258 is all connected to the 6th rapid slot A209 by triplate line, and the other end is connected to the first rapid slot B304, the second rapid slot B305, the 3rd rapid slot B306, the 4th rapid slot B307 and the 5th rapid slot B308 respectively by pipeline.First liquid helium hand valve V3152 connects the 6th rapid slot A209 by pipeline.First liquid nitrogen variable valve V3204, the second liquid nitrogen variable valve V3205, the 3rd liquid nitrogen variable valve V3206, the 4th liquid nitrogen variable valve V3207 and the 5th liquid nitrogen variable valve V3208 are connected to the first rapid slot A204, the second rapid slot A205, the 3rd rapid slot A206, the 4th rapid slot A207 and the 5th rapid slot A208 respectively by pipeline.
The first movable woven hose TL1, the second movable woven hose TL2, the 3rd movable woven hose TL3, the 4th movable woven hose TL4, the 5th movable woven hose TL5, the 6th movable woven hose TL6 and the 7th movable woven hose TL7 is also provided with in liquid helium induction system of the present invention.First movable woven hose TL1 adopts hose connecting structure, and two ends are Bayonet male joint (convex), internal diameter 40mm, for connecting the 3rd rapid slot B306 and body rear portion, cabin liquid helium heat sink 103.Second movable woven hose TL2 adopts hose connecting structure, and two ends are Bayonet male joint (convex), internal diameter 40mm, for connecting the 5th rapid slot B308 and plume adsorption pump 105.3rd movable woven hose TL3 adopts hose connecting structure, and two ends are Bayonet male joint (convex), internal diameter 20mm, for connecting the 4th rapid slot B307 and end socket liquid helium heat sink 104.4th movable woven hose TL4 adopts hose connecting structure, and two ends are Bayonet male joint (convex), internal diameter 40mm, for connecting the second rapid slot B305 and the anterior liquid helium heat sink 102 of cabin body.5th movable woven hose TL5 adopts hard tube syndeton, and one end is Bayonet male joint (convex), and the other end is Bayonet female joint (matrix), internal diameter 20mm.6th movable woven hose TL6 adopts hose connecting structure, two ends are Bayonet male joint (convex), internal diameter 20mm, 6th movable woven hose TL6 inserts the female joint of the 5th movable woven hose TL5, interface matches, for connecting the first rapid slot B304 and gate liquid helium heat sink 101, because the pipeline connecting gate liquid helium heat sink 101 and the first rapid slot B304 is long, so adopt two sections of movable woven hose TL5 and TL6.
7th movable woven hose TL7 adopts hose connecting structure, and two ends are Bayonet joint male joint (convex), and one end is used for connecting liquid helium tank car 112 fast, and the other end is used for connecting the 6th rapid slot A209 fast.
Based on above-mentioned a kind of liquid helium induction system heat sink for large scale more piece liquid helium, to liquid helium heat sink pass into liquid helium refrigeration before, need liquid helium is heat sink in liquid nitrogen thoroughly get rid of totally, otherwise liquid nitrogen can be frozen blocking pipeline by liquid helium, liquid helium is heat sink by liquid nitrogen turns the method for level to liquid helium, as shown in Figure 2, following step is specifically comprised:
Step one: liquid nitrogen residual during liquid helium is heat sink blows down;
Open nitrogen hand valve V3159, the second liquid helium hand valve V3153, the first liquid helium variable valve V3254, the second liquid helium variable valve V3255, the 3rd liquid helium variable valve V3256, the 4th liquid helium variable valve V3257 and the 5th liquid helium variable valve V3258 successively, heat sink to five liquid heliums: gate liquid helium is heat sink 101, body anterior liquid helium in cabin is heat sink 102, body rear portion, cabin liquid helium is heat sink 103, end socket liquid helium is heat sink 104 and plume adsorption pump 105, pass into nitrogen, liquid nitrogen is blown down from the heat sink top of liquid helium, till observing and not having liquid nitrogen to discharge.
Step 2: nitrogen blow-off residual during liquid helium is heat sink;
Open helium hand valve V3160, pass into helium to five liquid heliums are heat sink, nitrogen is blown down from the heat sink top of liquid helium, repeatedly purges three times, each 10 minutes, by the helium hand valve V3160 control time.
Step 3: by liquid nitrogen residual in liquid helium ice chest 114 or nitrogen blow-off;
The horizontal level of liquid helium ice chest 114 is lower than the heat sink position of liquid helium, and be easy to accumulate a small amount of liquid nitrogen or nitrogen, for preventing accumulating, this part needs last blowing.First rapid slot A204, the second rapid slot A205, the 3rd rapid slot A206, the 4th rapid slot A207 and the 5th rapid slot A208 are extracted from liquid helium ice chest, open helium hand valve V3160, helium is passed in liquid helium ice chest 114, the liquid nitrogen accumulated or nitrogen are blown down from liquid helium ice chest, repeatedly purge three times, each 3 minutes, by the helium hand valve V3160 control time.After purging, again by the first rapid slot A204, the second rapid slot A205, the 3rd rapid slot A206, the 4th rapid slot A207 and the 5th rapid slot A208 quick insertion liquid helium ice chest 114.
Step 4: the liquid helium refrigeration that liquid helium is heat sink;
Open the first liquid helium hand valve V3152, the first liquid helium variable valve V3254, the second liquid helium variable valve V3255, the 3rd liquid helium variable valve V3256, the 4th liquid helium variable valve V3257 and the 5th liquid helium variable valve V3258 successively, freeze to five heat sink liquid heliums that pass into of liquid helium.The large I of aperture of the first liquid helium variable valve V3254, the second liquid helium variable valve V3255, the 3rd liquid helium variable valve V3256, the 4th liquid helium variable valve V3257 and the 5th liquid helium variable valve V3258 regulates according to the temperature that each joint liquid helium is heat sink.
Claims (4)
1. for the liquid helium induction system that large scale more piece liquid helium is heat sink, it is characterized in that, comprising: heat-sink system, liquid nitrogen supply system, liquid helium supply system, nitrogen supply (NS) system and helium supply system;
Heat-sink system comprises gate liquid helium heat sink (101), the anterior liquid helium of cabin body heat sink (102), body rear portion, cabin liquid helium heat sink (103), end socket liquid helium is heat sink (104), the anterior liquid nitrogen heat sink (107) of plume adsorption pump (105), gate liquid nitrogen heat sink (106), cabin body, body rear portion, cabin liquid nitrogen heat sink (108) and end socket liquid nitrogen heat sink (109); Gate liquid nitrogen heat sink (106), gate liquid helium is heat sink (101), the anterior liquid nitrogen heat sink (107) of cabin body, body rear portion, cabin liquid nitrogen heat sink (108), end socket liquid helium is heat sink (104) arranges from front to back successively with end socket liquid nitrogen heat sink (109); It is inner that the anterior liquid helium of cabin body heat sink (102) is arranged on the anterior liquid nitrogen heat sink (107) of cabin body, and it is inner that body rear portion, cabin liquid helium heat sink (103) is arranged on body rear portion, cabin liquid nitrogen heat sink (108); It is inner that plume adsorption pump (105) is arranged on body rear portion, cabin liquid helium heat sink (103);
Liquid nitrogen supply system comprises the liquid nitrogen transfusion system providing liquid nitrogen refrigerating to liquid nitrogen heat sink, and provides the liquid nitrogen transfusion system of Liquid nitrogen precooler to the heat sink and plume adsorption pump of liquid helium;
The liquid nitrogen transfusion system of Liquid nitrogen precooler is provided to comprise to liquid helium is heat sink with plume adsorption pump: liquid nitrogen storage A (110), the first liquid nitrogen variable valve (V3204), the second liquid nitrogen variable valve (V3205), the 3rd liquid nitrogen variable valve (V3206), the 4th liquid nitrogen variable valve (V3207), the 5th liquid nitrogen variable valve (V3208) and connecting line, first liquid nitrogen variable valve (V3204), the second liquid nitrogen variable valve (V3205), the 3rd liquid nitrogen variable valve (V3206), the 4th liquid nitrogen variable valve (V3207) and the 5th liquid nitrogen variable valve (V3208) are integrated in liquid nitrogen ice chest (113), and liquid nitrogen ice chest (113) inside adopts pearlite thermal insulation, liquid nitrogen storage A (110) is by triplate line parallel join first liquid nitrogen variable valve (V3204), the second liquid nitrogen variable valve (V3205), the 3rd liquid nitrogen variable valve (V3206), the 4th liquid nitrogen variable valve (V3207) and the 5th liquid nitrogen variable valve (V3208), first liquid nitrogen variable valve (V3204) is connected by the entrance of pipeline final heat sink with gate liquid helium (101), second liquid nitrogen variable valve (V3205) is finally connected with the entrance of the anterior liquid helium of cabin body heat sink (102) by pipeline, 3rd liquid nitrogen variable valve (V3206) is finally connected with the entrance of body rear portion, cabin liquid helium heat sink (103) by pipeline, 4th liquid nitrogen variable valve (V3207) is connected by the entrance of pipeline final heat sink with end socket liquid helium (104), 5th liquid nitrogen variable valve (V3208) is finally connected with the entrance of plume adsorption pump (105) by pipeline,
The liquid nitrogen transfusion system of liquid nitrogen refrigerating is provided to comprise to liquid nitrogen heat sink: liquid nitrogen storage B (111), the first liquid nitrogen hand valve (V1121), the second liquid nitrogen hand valve (V1122), the 3rd liquid nitrogen hand valve (V1123), the 4th liquid nitrogen hand valve (V1124) and connecting line, liquid nitrogen storage B (111) passes on left pipeline and connects the first liquid nitrogen hand valve (V1121), is finally connected with gate liquid nitrogen heat sink (106) entrance, liquid nitrogen storage B (111) right side is by triplate line parallel join second liquid nitrogen hand valve (V1122), 3rd liquid nitrogen hand valve (V1123) and the 4th liquid nitrogen hand valve (V1124), liquid nitrogen storage B (111) right side is by triplate line parallel join second liquid nitrogen hand valve (V1122), 3rd liquid nitrogen hand valve (V1123) and the 4th liquid nitrogen hand valve (V1124), second liquid nitrogen hand valve (V1122) is finally connected with the entrance of cabin body front portion liquid nitrogen heat sink (107) by pipeline, 3rd liquid nitrogen hand valve (V1123) is finally connected with the entrance at body rear portion, cabin liquid nitrogen heat sink (108) by pipeline, 4th liquid nitrogen hand valve is finally connected with the entrance of end socket liquid nitrogen heat sink (109) by pipeline,
Liquid helium supply system is freezed to the heat sink liquid helium that provides of liquid helium, comprises liquid helium tank car (112), the first liquid helium hand valve (V3152), the first liquid helium variable valve (V3254), the second liquid helium variable valve (V3255), the 3rd liquid helium variable valve (V3256), the 4th liquid helium variable valve (V3257), the 5th liquid helium variable valve (V3258) and connecting line, first liquid helium variable valve (V3254), the second liquid helium variable valve (V3255), the 3rd liquid helium variable valve (V3256), the 4th liquid helium variable valve (V3257) and the 5th liquid helium variable valve (V3258) are integrated in liquid helium ice chest (114), liquid helium ice chest (114) outer wall adopts double-layer stainless steel, and centre vacuumizes, liquid helium tank car (112) is by the first liquid helium hand valve (V3152) parallel join first liquid helium variable valve (V3254), the second liquid helium variable valve (V3255), the 3rd liquid helium variable valve (V3256), the 4th liquid helium variable valve (V3257) and the 5th liquid helium variable valve (V3258) respectively, first liquid helium hand valve (V3152) is for controlling the liquid outlet quantity of liquid helium tank car (112), first liquid helium variable valve (V3254) is connected by the entrance of pipeline final heat sink with gate liquid helium (101), second liquid helium variable valve (V3255) is finally connected with the entrance of the anterior liquid helium of cabin body heat sink (102) by pipeline, 3rd liquid helium variable valve (V3256) is finally connected with the entrance of body rear portion, cabin liquid helium heat sink (103) by pipeline, 4th liquid helium variable valve (V3257) is connected by the entrance of pipeline final heat sink with end socket liquid helium (104), 5th liquid helium variable valve (V3258) is finally connected with the entrance of plume adsorption pump (105) by pipeline,
Nitrogen supply (NS) system is used for providing nitrogen to the heat sink and liquid helium ice chest of liquid helium, and when at liquid helium, heat sink and liquid helium ice chest turns from liquid nitrogen to liquid helium grade, the liquid nitrogen during liquid helium is heat sink purges clean; Nitrogen supply (NS) system comprises nitrogen pot (115), nitrogen hand valve (V3159), safety valve (V3051), the second liquid helium hand valve (V3153) and connecting line; Nitrogen pot (115) connects nitrogen hand valve (V3159) and the second liquid helium hand valve (V3153) successively by pipeline, and is finally connected to the porch of five liquid helium variable valve in liquid helium ice chest (114); Safety valve (V3051) is arranged on the second liquid helium hand valve (V3153) exit, for preventing system pressure too high; Nitrogen hand valve (V3159) is for controlling nitrogen amount size;
Helium supply system is used for providing helium to liquid helium is heat sink with liquid helium ice chest, is purged by the nitrogen in heat sink for liquid helium and liquid helium ice chest clean when turning level; Helium supply system comprises helium tank (116), helium hand valve (V3160) and connecting line; Helium tank (116) connects helium hand valve (V3160) by pipeline, and is finally connected to the second liquid helium hand valve (V3153) porch.
2. liquid helium induction system according to claim 1, it is characterized in that, described liquid helium ice chest (114) is provided with the first rapid slot A (204), the second rapid slot A (205), the 3rd rapid slot A (206), the 4th rapid slot A (207), the 5th rapid slot A (208), the 6th rapid slot A (209), the first rapid slot B (304), the second rapid slot B (305), the 3rd rapid slot B (306), the 4th rapid slot B (307) and the 5th rapid slot B (308); Between first rapid slot A (204) and the first rapid slot B (304), between the second rapid slot A (205) and the second rapid slot B (305), between the 3rd rapid slot A (206) and the 3rd rapid slot B (306), between the 4th rapid slot A (207) and the 4th rapid slot B (307) and between the 5th rapid slot A (208) and the 5th rapid slot B (308), be all provided with direct pipeline and connect; First liquid nitrogen variable valve (V3204), the second liquid nitrogen variable valve (V3205), the 3rd liquid nitrogen variable valve (V3206), the 4th liquid nitrogen variable valve (V3207) and the 5th liquid nitrogen variable valve (V3208) are connected to the first rapid slot A (204), the second rapid slot A (205), the 3rd rapid slot A (206), the 4th rapid slot A (207) and the 5th rapid slot A (208) respectively by pipeline; First liquid helium hand valve (V3152) connects the 6th rapid slot A (209) by pipeline; One end of first liquid helium variable valve (V3254), the second liquid helium variable valve (V3255), the 3rd liquid helium variable valve (V3256), the 4th liquid helium variable valve (V3257) and the 5th liquid helium variable valve (V3258) is all connected to the 6th rapid slot A (209) by triplate line, and the other end is connected to the first rapid slot B (304), the second rapid slot B (305), the 3rd rapid slot B (306), the 4th rapid slot B (307) and the 5th rapid slot B (308) respectively by pipeline.
3. liquid helium induction system according to claim 2, it is characterized in that, described liquid helium induction system is also provided with the first movable woven hose (TL1), the second movable woven hose (TL2), the 3rd movable woven hose (TL3), the 4th movable woven hose (TL4), the 5th movable woven hose (TL5), the 6th movable woven hose (TL6) and the 7th movable woven hose (TL7);
First movable woven hose (TL1) adopts hose connecting structure, and two ends are Bayonet male joint, internal diameter 40mm, for connecting the 3rd rapid slot B (306) and body rear portion, cabin liquid helium heat sink (103);
Second movable woven hose (TL2) adopts hose connecting structure, and two ends are Bayonet male joint, internal diameter 40mm, for connecting the 5th rapid slot B (308) and plume adsorption pump (105);
3rd movable woven hose (TL3) adopts hose connecting structure, and two ends are Bayonet male joint, internal diameter 20mm, for connecting the 4th rapid slot B (307) and end socket liquid helium heat sink (104);
4th movable woven hose (TL4) adopts hose connecting structure, and two ends are Bayonet male joint, internal diameter 40mm, for connecting the second rapid slot B (305) and the anterior liquid helium of cabin body heat sink (102);
5th movable woven hose (TL5) adopts hard tube syndeton, and one end is Bayonet male joint, and the other end is Bayonet female joint, internal diameter 20mm; 6th movable woven hose (TL6) adopts hose connecting structure, and two ends are Bayonet male joint, internal diameter 20mm; 6th movable woven hose (TL6) inserts the 5th movable woven hose (TL5) female joint; 5th movable woven hose (TL5) and the 6th movable woven hose (TL6) are for being connected the first rapid slot B (304) and gate liquid helium heat sink (101);
7th movable woven hose (TL7) adopts hose connecting structure, and two ends are the male joint of Bayonet joint, and one end is used for connecting liquid helium tank car (112) fast, and the other end is for connecting the 6th rapid slot A (209).
4., based on the heat sink method being turned level by liquid nitrogen to liquid helium of liquid helium of the liquid helium induction system described in Claims 2 or 3, it is characterized in that, comprise the following steps:
Step one: liquid nitrogen residual during liquid helium is heat sink blows down;
Open nitrogen hand valve (V3159) successively, second liquid helium hand valve (V3153), first liquid helium variable valve (V3254), second liquid helium variable valve (V3255), 3rd liquid helium variable valve (V3256), 4th liquid helium variable valve (V3257) and the 5th liquid helium variable valve (V3258), heat sink to five liquid heliums: gate liquid helium is heat sink (101), the anterior liquid helium of cabin body heat sink (102), body rear portion, cabin liquid helium heat sink (103), end socket liquid helium is heat sink (104) and plume adsorption pump (105), pass into nitrogen, liquid nitrogen is blown down from the heat sink top of liquid helium, until observe do not have liquid nitrogen discharge till,
Step 2: nitrogen blow-off residual during liquid helium is heat sink;
Open helium hand valve (V3160), pass into helium to five liquid heliums are heat sink, nitrogen is blown down from the heat sink top of liquid helium, repeatedly purges three times, each 10 minutes, by helium hand valve (3160) control time;
Step 3: by liquid nitrogen residual in liquid helium ice chest (114) or nitrogen blow-off;
First rapid slot A (204), the second rapid slot A (205), the 3rd rapid slot A (206), the 4th rapid slot A (207) and the 5th rapid slot A (208) are extracted from liquid helium ice chest (114), open helium hand valve (V3160), helium is passed in liquid helium ice chest, the liquid nitrogen accumulated or nitrogen are blown down from liquid helium ice chest (114), repeatedly purge three times, each 3 minutes, by helium hand valve (3160) control time; After purging, again by the first rapid slot A (204), the second rapid slot A (205), the 3rd rapid slot A (206), the 4th rapid slot A (207) and the 5th rapid slot A (208) quick insertion liquid helium ice chest (114);
Step 4: the liquid helium refrigeration that liquid helium is heat sink;
Open the first liquid helium hand valve (V3152) successively, first liquid helium variable valve (V3254), second liquid helium variable valve (V3255), 3rd liquid helium variable valve (V3256), 4th liquid helium variable valve (V3257) and the 5th liquid helium variable valve (V3258), freeze to five heat sink liquid heliums that pass into of liquid helium, first liquid helium variable valve (V3254), second liquid helium variable valve (V3255), 3rd liquid helium variable valve (V3256), the aperture size of the 4th liquid helium variable valve (V3257) and the 5th liquid helium variable valve (V3258) regulates according to the temperature that each liquid helium is heat sink.
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