CN103341375A - High and low temperature environment simulation experiment system - Google Patents
High and low temperature environment simulation experiment system Download PDFInfo
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- CN103341375A CN103341375A CN2013102410383A CN201310241038A CN103341375A CN 103341375 A CN103341375 A CN 103341375A CN 2013102410383 A CN2013102410383 A CN 2013102410383A CN 201310241038 A CN201310241038 A CN 201310241038A CN 103341375 A CN103341375 A CN 103341375A
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Abstract
The invention discloses a high and low temperature environment simulation experiment system. The high and low temperature environment simulation experiment system comprises a high and low temperature experiment box, a gas replacement assembly, a fast heating and heat-preservation assembly and a fast cooling and heat-preservation assembly. The gas replacement assembly is used for replacing air in the high and low temperature experiment box with ultralow-dew point high-purity nitrogen. The fast heating and heat-preservation assembly is used for heating the interior of the high and low temperature experiment box to a required temperature and keeping the temperature in a certain time period. The fast cooling and heat-preservation assembly is used for cooling the high and low temperature experiment box to a required temperature and keeping the temperature in a certain time period. The high and low temperature environment simulation experiment system utilizes an air-bath vaporizer to supply a small flow of system nitrogen, the high and low temperature experiment box utilizes a wall compound-insulation method so that the operation can be carried out at a temperature of -120 to 170 DEG C, and circulating cooling and heating fans work respectively in appropriate temperature ranges so that circulating fan use reliability is guaranteed.
Description
Technical field
What the present invention relates to is the high/low temperature environmental simulation pilot system of a kind of deep cooling and high-temperature heat supply technical field, in particular the high/low temperature environmental simulation pilot system in liquid nitrogen refrigerating and heat supply process field.
Background technology
Development along with China a new generation spacecraft technology, spacecraft function closeness increases, the surface-sensitive parts increase, increase projected life, the particularly use of a large amount of advanced composite material (ACM)s, polymeric material, the microelectronic circuits integrated level improves constantly, and makes spacecraft become more responsive to the influence of space environment effect, the space particular surroundings effect that does not originally cause enough attention becomes to the influence of spacecraft and becomes increasingly conspicuous, and becoming influences highly reliable key factor of spacecraft long-life.The spacecraft that space particular surroundings effect is induced will become more outstanding in the rail failure problems, therefore strengthen the particular surroundings experimental technique research of spacecraft space, avoid or alleviate space particular surroundings effect to the influence of satellite reliability and projected life, most important to the development of Chinese Space technology.
The pilot system that can satisfy the spacecraft thermocycling at present has high low temperature experimental box, this chamber system adopts electric heater to provide heat for system, adopt the liquid nitrogen spraying mode to provide cold for system, system is open-cycle system, heating or cooled gas nitrogen are outdoor by directly discharging behind the high low temperature experimental box, caused the direct waste of heat and cold, and the operating temperature of high low temperature experimental box is generally at-50 ℃～+ 50 ℃, the operating temperature interval is narrow and small, warming and cooling rate is slow, poor temperature uniformity.Can be used in the spacecraft thermocycling at present, and the high low temperature experimental box that has a patent of invention does not retrieve.
High/low temperature environmental simulation pilot system of the present invention, its operating temperature are-120 ℃～+ 170 ℃, and warming and cooling rate is 3 ℃/min～10 ℃/min, and temperature uniformity is ± 3 ℃.The zero-g that is primarily aimed under the high and low temperature environment of satellite antenna, solar battery array launches test.This system can also realize quick temperature change test, soak test, the low temperature insulation test under the different high low temperature operating conditions simultaneously.
Summary of the invention
In order to overcome the defective of prior art, the invention provides a kind of high/low temperature environmental simulation experimental system, it comprises a high low temperature experimental box, gas displacement assembly, the heat insulation module that is rapidly heated, fast cooling heat insulation module; Described gas displacement assembly, the heat insulation module that is rapidly heated, fast cooling heat insulation module are connected with described high low temperature experimental box respectively; Described gas displacement assembly is used for the air displacement of described high low temperature experimental box is become high-purity gas nitrogen of ultralow dew point, the described heat insulation module that is rapidly heated is used for described high low temperature experimental box inside was heated to the temperature that needs and keeps this temperature in a period of time, and described fast cooling heat insulation module is used for described high low temperature experimental box was cooled to the temperature that needs and keep this temperature in a period of time.
Preferably, described gas displacement assembly comprises liquid nitrogen storage tank, first pneumatic control valve, water-bath vaporizer, vacuum tank, pressure-reducing valve, electric heater, second pneumatic control valve, the 3rd pneumatic control valve door, cycling hot blower fan, the 4th pneumatic control valve, the 5th pneumatic control valve, the 6th pneumatic control valve;
The left branch road of the right outlet of described liquid nitrogen storage tank is connected with the import of described first pneumatic control valve, the outlet of described first pneumatic control valve is connected with the import of described water-bath vaporizer, the outlet of described water-bath vaporizer is connected with the import of described vacuum tank, the outlet of described vacuum tank is connected with the import of described pressure-reducing valve, the outlet of described pressure-reducing valve is connected with the import of described electric heater, branch road is connected with the import of described pneumatic control valve door under the outlet of described electric heater, the following outlet of described second pneumatic control valve is connected with the import of described cycling hot blower fan, the left side outlet of the described second pneumatic control valve door is connected with the import of described the 3rd pneumatic control valve, the right side outlet of described cycling hot blower fan is connected with described the 4th pneumatic control valve import, the left side outlet of described cycling hot blower fan is connected with described the 3rd pneumatic control valve outlet, the outlet of described the 4th pneumatic control valve is connected with the bottom tuyeres of described high low temperature experimental box, a left side, air port, the top outlet of high low temperature experimental box is connected with the import of described the 5th pneumatic control valve, the outlet of described the 5th pneumatic control valve communicates with atmospheric environment, and the gas after the displacement is directly discharged outdoor by described the 5th pneumatic control valve.
Preferably, the described heat insulation module that is rapidly heated comprises cycling hot blower fan, first pneumatic control valve, second pneumatic control valve, high low temperature experimental box, the 3rd pneumatic control valve, the 4th pneumatic control valve, electric heater, the 5th pneumatic control valve, the 6th pneumatic control valve, pneumatic stopping valve;
The right side outlet of described cycling hot blower fan is connected with the described first pneumatic control valve import, the left side outlet of cycling hot blower fan is connected with described second pneumatic control valve outlet, the outlet of described first pneumatic control valve is connected with the bottom tuyeres of described high low temperature experimental box, air port, the top upper outlet of high low temperature experimental box is connected with the import of described the 4th pneumatic control valve, the outlet of described the 4th pneumatic control valve is connected with the import of electric heater, the outlet of electric heater is connected with the import of described the 5th pneumatic control valve, the outlet of described the 5th pneumatic control valve is connected with the upper inlet of cycling hot blower fan, the left import of cycling hot blower fan is connected with the import of described the 6th pneumatic control valve, the import of described pneumatic stopping valve is connected on the pipeline between circulating fan and described first pneumatic control valve, outlet communicates with atmospheric environment, be rapidly heated and the soak process, by the real-time exhaust of pneumatic stopping valve, keep the pressure stability in the pilot system.
Preferably, described fast cooling heat insulation module comprises circulation cold air machine, first pneumatic control valve, gas-liquid heat-exchange, second pneumatic control valve, electric heater, the 3rd pneumatic control valve, liquid nitrogen control valve group, the 4th pneumatic control valve, liquid nitrogen storage tank, the 5th pneumatic control valve, process allowance vaporizer, pneumatic stopping valve;
The upper outlet of described circulation cold air machine is connected with the gas-liquid heat-exchange import, the left side outlet of circulation cold air machine is connected with the outlet of first pneumatic control valve, the outlet of gas-liquid heat-exchange is connected with the lower inlet of second pneumatic control valve, the upper outlet of second pneumatic control valve is connected with the outlet of electric heater, the import of electric heater is connected with the import of the 3rd pneumatic control valve, the outlet of the 3rd pneumatic control valve is connected with the air port, top of high low temperature experimental box, the bottom tuyeres of high low temperature experimental box is connected with the import of the 4th pneumatic control valve, the outlet of the 4th pneumatic control valve is connected with the upper inlet of circulation cold air machine, the import of first pneumatic control valve is connected with the left import of circulation cold air machine, the left side outlet of liquid nitrogen storage tank is connected with the import of the 5th pneumatic control valve, the outlet of the 5th pneumatic control valve is connected with empty import of bathing vaporizer, empty outlet of bathing vaporizer is connected with the import of described pneumatic stopping valve, on the pipeline between the electric heater outlet pneumatic control valve of the outlet access fast cooling of pneumatic stopping valve and low temperature insulating process, the left branch road of the right side outlet of liquid nitrogen storage tank is connected with the import of liquid nitrogen control valve group, the outlet of liquid nitrogen control valve group is connected with the left import of gas-liquid heat-exchange, and the left side outlet of gas-liquid heat-exchange is connected with the left side outlet of second pneumatic control valve.
Preferably, gas nitrogen and liquid nitrogen carry out exchange heat in described gas-liquid heat-exchange inside, and the heat that liquid nitrogen obtains gas nitrogen all is vaporizated into gas nitrogen, and gas nitrogen obtains the latent heat of vaporization of liquid nitrogen, and temperature reduces.
Preferably, the described empty vaporizer of bathing becomes temperature to be lower than the low wet nitrogen of environment temperature liquid nitrogen vaporization, and described water-bath vaporizer is normal temperature gas nitrogen with liquid nitrogen vaporization.
Preferably, the operating temperature of described circulation cold air machine be-150 ℃ to normal temperature, the operating temperature of described cycling hot blower fan is normal temperature to 200 ℃.
Preferably, described high low temperature experimental box adopts compound insulating material to carry out wall thermal insulating, and described high low temperature experimental box is operated in the arbitrary temperature between-120 ℃～170 ℃, and insulation is more than 4 hours.
Preferably, gas nitrogen can two-way flow in described electric heater, and described electric heater operating voltage is 380V.
Preferably, the orifice plate balanced ventilation is adopted at described high low temperature experimental box top, and the bottom is adopted the orifice plate balanced ventilation equally.
Compared with prior art, beneficial effect of the present invention is as follows:
(1) adopts the pneumatic stopping valve automatic vent according to the variation of system's internal pressure, the regulating system internal pressure, avoided the liquid nitrogen waste under the traditional high-low temperature chamber system open type mode of heating, and problems such as the heat waste that the direct discharging of High Temperature Gas nitrogen causes after the heat exchange and environmental thermal pollution, significantly reduce the load of electric heater simultaneously, saved the energy;
(2) according to the variation of gas nitrogen pressure in the system, adopt empty replenishment system gas nitrogen of bathing the vaporizer low discharge, optimized nitrogen discharged liquid nitrogen waste and the loss of refrigeration capacity that causes of low wet of traditional open-cycle system, the cold that has significantly reduced system is supplied with;
(3) orifice feeding is adopted at the top, the same orifice feeding that adopts in bottom, and according to gas flow characteristic, on adopting, fast cooling and low temperature insulating process send air supply mode next time, be rapidly heated and adopt the air supply mode of serving back down with soak, not only improve the temperature homogeneity in the high low temperature experimental box, and reduced system pressure drop, reduced the blower fan load;
(4) high low temperature experimental box adopts the wall thermal insulating mode of complex heat-preservation, and in the time of can realizing-120 ℃～+ 170 ℃ temperature range work, high low temperature experimental box outer surface is dewfall not;
(5) adopt circulation Cooling and heating blower system, the circulation Cooling and heating blower is selected suitable operating temperature section operation separately, guarantee the dependability of circulating fan, improved the service life of circulating fan, and guaranteed the big temperature difference operation of integrated environment simulation system.
Certainly, implement arbitrary product of the present invention and might not need to reach simultaneously above-described all advantages.
Description of drawings
Fig. 1 is the structural representation of embodiment provided by the invention.
The specific embodiment
The invention provides a kind of high/low temperature environmental simulation experimental system, it comprises a high low temperature experimental box, gas displacement assembly, the heat insulation module that is rapidly heated, fast cooling heat insulation module; Described gas displacement assembly, the heat insulation module that is rapidly heated, fast cooling heat insulation module are connected with described high low temperature experimental box 47 respectively; Described gas displacement assembly is used for the air displacement of described high low temperature experimental box 47 is become high-purity gas nitrogen of ultralow dew point, the described heat insulation module that is rapidly heated is used for described high low temperature experimental box 47 inside were heated to the temperature that needs and keep this temperature in a period of time, and described fast cooling heat insulation module is used for described high low temperature experimental box 47 was cooled to the temperature that needs and keep this temperature in a period of time.
Embodiment 1
Described gas displacement assembly comprises liquid nitrogen storage tank 48, pneumatic control valve 70, water-bath vaporizer 53, vacuum tank 54, pressure-reducing valve 55, electric heater 66, pneumatic control valve 67, pneumatic control valve door 63, cycling hot blower fan 64, pneumatic control valve 70, pneumatic control valve 68, pneumatic control valve 69;
The left branch road of liquid nitrogen storage tank 48 right outlets is connected with the import of pneumatic control valve 52, the outlet of pneumatic control valve 52 is connected with the import of water-bath vaporizer 53, the outlet of water-bath vaporizer 53 is connected with the import of vacuum tank 54, the outlet of vacuum tank 54 is connected with the import of pressure-reducing valve 55, the outlet of pressure-reducing valve 55 is connected with the import of electric heater 66, branch road is connected with the import of pneumatic control valve door 67 under the outlet of electric heater 66, the pneumatic control valve door 59 of the last branch road of electric heater 66 outlets is closed in this process, the following outlet of pneumatic control valve door 67 is connected with the import of cycling hot blower fan 64, the left side outlet of pneumatic control valve door 67 is connected with the import of pneumatic control valve 63, the right side outlet of cycling hot blower fan 64 is connected with pneumatic control valve 70 imports, the left side outlet of cycling hot blower fan 64 is connected with pneumatic control valve 63 outlets, the outlet of pneumatic control valve 70 is connected with the bottom tuyeres of high low temperature experimental box 47, a left side, air port, the top outlet of high low temperature experimental box 47 is connected with the import of pneumatic control valve 68, air port, the top upper outlet of high low temperature experimental box 47 is connected with the import of pneumatic control valve 69, pneumatic control valve 69 cuts out in the replacement process, and the outlet of pneumatic control valve 68 communicates with atmospheric environment.Gas after the displacement is directly discharged outdoor by pneumatic control valve 68.
The described heat insulation module that is rapidly heated comprises cycling hot blower fan 64, pneumatic control valve 70, high low temperature experimental box 47, pneumatic control valve 68, electric heater 66, pneumatic control valve 67, pneumatic control valve 69, pneumatic control valve 63, pneumatic stopping valve 65;
The right side outlet of cycling hot blower fan 64 is connected with pneumatic control valve 70 imports, the left side outlet of cycling hot blower fan 64 is connected with pneumatic control valve 63 outlets, the outlet of pneumatic control valve 70 is connected with the bottom tuyeres of high low temperature experimental box 47, air port, the top upper outlet of high low temperature experimental box 47 is connected with the import of pneumatic control valve 69, a left side, air port, the top outlet of high low temperature experimental box 47 is connected with the import of pneumatic control valve 68, be rapidly heated and soak in pneumatic control valve 68 close, the outlet of pneumatic control valve 69 is connected with the import of electric heater 66, the outlet of electric heater 66 is connected with the import of pneumatic control valve 67, the outlet of pneumatic control valve 67 is connected with the upper inlet of cycling hot blower fan 64, and the left import of cycling hot blower fan 64 is connected with the import of pneumatic control valve 63.The import of pneumatic stopping valve 65 is connected on the pipeline between circulating fan and the pneumatic control valve 70, and outlet communicates with atmospheric environment, being rapidly heated and the soak process, by the real-time exhaust of pneumatic stopping valve 65, keeps the interior pressure stability of pilot system.
Described fast cooling heat insulation module comprises circulation cold air machine 62, pneumatic control valve 61, gas-liquid heat-exchange 60, second pneumatic control valve 59, electric heater 66, pneumatic control valve 69, pneumatic control valve 70, liquid nitrogen storage tank 48, pneumatic control valve 49, process allowance vaporizer, pneumatic stopping valve 51;
The upper outlet of circulation cold air machine 62 is connected with gas-liquid heat-exchange 60 imports, the left side outlet of circulation cold air machine 62 is connected with the outlet of pneumatic control valve 61, the outlet of gas-liquid heat-exchange 60 is connected with the lower inlet of pneumatic control valve 59, the upper outlet of pneumatic control valve 59 is connected with the outlet of electric heater 66, the import of electric heater 66 is connected with the import of pneumatic control valve 69, the outlet of pneumatic control valve 69 is connected with the air port, top of high low temperature experimental box 47, the bottom tuyeres of high low temperature experimental box 47 is connected with the import of pneumatic control valve 70, the outlet of pneumatic control valve 70 is connected with the upper inlet of circulation cold air machine 62, and the import of pneumatic control valve 61 is connected with the left import of circulation cold air machine 62.The left side outlet of liquid nitrogen storage tank 48 is connected with the import of pneumatic control valve 49, the outlet of pneumatic control valve 49 is connected with empty import of bathing vaporizer 50, empty outlet of bathing vaporizer 50 is connected with the import of pneumatic stopping valve 51, on the pipeline between the outlet access fast cooling of pneumatic stopping valve 51 and the electric heater of the low temperature insulating process 66 outlet pneumatic control valves 59, the left branch road of the right side outlet of liquid nitrogen storage tank 48 is connected with the import of liquid nitrogen control valve group 56, the outlet of liquid nitrogen control valve group 56 is connected with the left import of gas-liquid heat-exchange 60, and the left side outlet of gas-liquid heat-exchange 60 is connected with the left side outlet of pneumatic control valve 59.Liquid nitrogen control valve group 56 is to be composed in parallel by pneumatic control valve 57 and pneumatic control valve 58.
The operation principle of displacement apparatus is: the liquid nitrogen that liquid nitrogen storage tank 48 flows out is adjusted to through pneumatic control valve 52 that suitable flow is laggard goes into water-bath vaporizer 53; liquid nitrogen flows into vacuum tank 54 be vaporized into normal temperature gas nitrogen in water-bath vaporizer 53 after; after the pressure stability; 55 decompressions flow into electric heater 66 after setting pressure through pressure-reducing valve; gas nitrogen is heated to the gas nitrogen of design temperature in electric heater 66; after pneumatic control valve 67 is regulated flow; under the driving of cycling hot blower fan 64, enter high low temperature experimental box 47 from high low temperature experimental box 47 bottom tuyeres; purge the air in the high low temperature experimental box 47; mist after the displacement is discharged outdoor by pneumatic control valve 68; the purpose of replacement process mainly is in order the humid air in the former casing to be replaced as high-purity gas nitrogen of ultralow dew point, to protect plated film parts very responsive to humidity in the space product.
The operation principle of heat insulation module of being rapidly heated is: after the displacement, be full of high-purity gas nitrogen in the system, gas nitrogen is heated by electric heater 66, under the driving of cycling hot blower fan 64, enter high low temperature experimental box 47, with laboratory's heat exchange, the test indoor temperature raises, gas nitrogen temperature after the heat exchange reduces, temperature lower temperature gas nitrogen flows into electric heater 66 again, enter the warm experimental box 47 of height after being heated to form the gas nitrogen of higher temperature, so repeatedly, high low temperature experimental box 47 finally is heated to the temperature of default, and remains under this temperature operation and be not less than 4 hours.In this enclosed heat cycles process, along with the rising of high low temperature experimental box 47 system temperatures, intrasystem gas nitrogen density reduces volumetric expansion.Therefore, in order to guarantee pressure stability in the high low temperature experimental box 47 about 300Pa, pneumatic stopping valve 65 is opened in real time automatically according to the requirement of control system, discharges unnecessary gas outdoor.
The operation principle of fast cooling heat insulation module is: after the displacement, be full of high-purity gas nitrogen in the system, gas nitrogen and the gas-liquid heat-exchange 60 heat exchanges cooling that is cooled, gas nitrogen after cooling air port, top from high low temperature experimental box 47 under the driving of circulation cold air machine 62 enters high low temperature experimental box 47, with laboratory's heat exchange, the test indoor temperature reduces, gas nitrogen temperature after the heat exchange raises, the higher gas nitrogen of temperature flows into gas-liquid heat-exchange 60 again, entered high low temperature experimental box 47 again by the gas nitrogen behind the cold cooling gas nitrogen, so repeatedly, thermocycling is finally cooled to the cryogenic temperature of default, and remains under this temperature operation and be not less than 4 hours.In this enclosed fast cooling and low temperature insulation cyclic process, along with the reduction of gas nitrogen temperature in high low temperature experimental box 47 systems, intrasystem gas nitrogen density increases, and the pressure in the high low temperature experimental box 47 reduce.Therefore, in order to guarantee pressure stability in the high low temperature experimental box 47 at 300Pa, the gas nitrogen of bathing vaporizer 50 from sky enters the cold circulatory system under the real-time unlatching of pneumatic stopping valve 51, replenish gas nitrogen, and the holding chamber internal pressure is stable.
The replacement process of concrete this displacement apparatus is: open pneumatic control valve 52, pressure-reducing valve 55, pneumatic control valve 67, pneumatic control valve 70 and pneumatic control valve 68.Opening electric heater 66.Other valves of system and equipment are in closes and stopped status.The liquid nitrogen that liquid nitrogen storage tank 48 flows out is vaporized into normal temperature gas nitrogen in water-bath vaporizer 53, and process electric heater 66 is heated into the gas nitrogen that is higher than environment temperature, enter high low temperature experimental box 47, air in the high low temperature experimental box 47 is replaced, mist after the displacement is discharged outdoor by pneumatic control valve 68, all the time detect the hydrone content in the high low temperature experimental box 47 in the replacement process, when the content of corresponding hydrone makes the dew-point temperature of high low temperature experimental box 47 inside below-50 ℃ the time, replacement process finishes.
The course of work of concrete this heat insulation module that is rapidly heated is: open pneumatic control valve 70, pneumatic control valve 69, pneumatic control valve 67 and pneumatic control valve 63, opening electric heater 66, ON cycle air-heater 64, and according to the real-time opening and closing pneumatic stopping valve 65 of pressure feedback confidence in the high low temperature experimental box 47.Other valves of system and equipment are in closes and stopped status.Gas nitrogen is under the driving of cycling hot blower fan 64, in system, circulate, high low temperature experimental box 47 constantly obtains the heat that electric heater 66 offers gas nitrogen by the gas nitrogen cycle, temperature rises gradually, temperature in high low temperature experimental box 47 is elevated to design temperature, in the Adjustment System electric heater 66 add heat, make the keeping warm mode under the system held design temperature, and the insulation long period.From the heat cycles flow process of system as can be seen, compare with traditional high-low temperature chamber open type environmental test system, this closed circulation system can reduce the demand of gas nitrogen significantly, reduces the thermic load of heater.
The course of work of this fast cooling heat insulation module is: open pneumatic control valve 59, pneumatic control valve 69, pneumatic control valve 70, pneumatic control valve 61 and liquid nitrogen control valve group 56, ON cycle air-cooler 62.Intrasystem circulating air nitrogen obtains cold from gas-liquid heat-exchange 60 and supplies with high low temperature experimental box 47, temperature in the high low temperature experimental box 47 reduces gradually, when being reduced to fixed temperature, cold by liquid nitrogen control valve group 56 regulating systems is supplied with, make high low temperature experimental box 47 be in keeping warm mode, and the insulation long period.In this cyclic process, change by the pressure that detects in the high low temperature experimental box 47, regulate the opening and closing of pneumatic stopping valve 51 and pneumatic control valve 49 in real time, keep the pressure stability in the high low temperature experimental box 47.Be incubated circulation process as can be seen from fast cooling and the low temperature of system, 47 systems compare with the high low temperature experimental box of traditional open type, and this closed circulation system can reduce the demand of gas nitrogen significantly, and reduce the refrigeration duty of gas-liquid heat-exchange 60.This closed circulation system can reduce the demand of liquid nitrogen significantly simultaneously, saves experimentation cost.
Working fluid provided by the invention is the gentle nitrogen of liquid nitrogen, and liquid nitrogen provides displacement and circulating air nitrogen by water-bath vaporizer 53 systems of being vaporizated into; Bathing vaporizer 50 by sky is system's fast cooling process and low temperature insulating process supply circulating air nitrogen, being characterized as of gas-liquid heat-exchange 60: gas nitrogen and liquid nitrogen carry out exchange heat in gas-liquid heat-exchange 60 inside, the heat that liquid nitrogen obtains gas nitrogen all is vaporizated into gas nitrogen, gas nitrogen obtains the latent heat of vaporization of liquid nitrogen, and temperature reduces.Gas nitrogen after gas nitrogen behind the liquid nitrogen vaporization and the cooling mixes in the exit of gas-liquid heat-exchange 60, and this structure of gas-liquid heat-exchange 60 can be utilized the latent heat of vaporization and the sensible heat of liquid nitrogen more fully; Being characterized as of liquid nitrogen control valve group 56: liquid nitrogen control valve group 56 is made up of the pneumatic control valve of two different latus rectums, the flow adjustment range difference of two control valves, and cold that can more effective adjusting gas-liquid heat-exchange 60 is supplied with scope; Being characterized as of empty bath vaporizer 50: liquid nitrogen is bathed in the vaporizer 50 at sky and is vaporized into the low wet nitrogen that temperature is lower than environment temperature fully, and vapourizing temperature can be regulated within the specific limits; Liquid nitrogen is vaporized into normal temperature gas nitrogen fully in water-bath vaporizer 53; The operating temperature of circulation cold air machine 62 be-150 ℃ to normal temperature, and outer surface dewfall not in the course of the work; The operating temperature of cycling hot blower fan 64 is normal temperature to 200 ℃, and hull-skin temperature is no more than 40 ℃ in the course of the work; High low temperature experimental box 47 adopts compound insulating material to carry out wall thermal insulating, makes high low temperature experimental box 47 can be operated in the arbitrary temperature between-120 ℃～170 ℃, and be incubated more than 4 hours that temperature uniformity is ± 3 ℃, and outer surface is dewfall not.The orifice plate balanced ventilation is adopted at the laboratory top, and the bottom is adopted the orifice plate balanced ventilation equally.According to the gas flow principle, in fast cooling and the low temperature insulating process, high low temperature experimental box 47 adopts the air-supply of air port, top, the air supply mode of bottom tuyeres return air; Be rapidly heated and the soak process in, high low temperature experimental box 47 adopts bottom tuyeres air-supply, the air supply mode of air port, top return air; Air supply mode in the replacement process be rapidly heated identical with the soak process; Gas nitrogen can two-way flow in electric heater 66, electrical heating operating voltage 380V.Replacement process is rapidly heated and the pipe-line system of soak process and fast cooling and low temperature insulating process has overlapping at the import and export of high low temperature experimental box 47.
More than the disclosed preferred embodiment of the present invention just be used for helping to set forth the present invention.Preferred embodiment does not have all details of detailed descriptionthe, does not limit this invention yet and only is the described specific embodiment.Obviously, according to the content of this specification, can make many modifications and variations.These embodiment are chosen and specifically described to this specification, is in order to explain principle of the present invention and practical application better, thereby the technical field technical staff can understand and utilize the present invention well under making.The present invention only is subjected to the restriction of claims and four corner and equivalent.
Claims (10)
1. a high/low temperature environmental simulation experimental system is characterized in that, comprises a high low temperature experimental box, gas displacement assembly, the heat insulation module that is rapidly heated, fast cooling heat insulation module; Described gas displacement assembly, the heat insulation module that is rapidly heated, fast cooling heat insulation module are connected with described high low temperature experimental box respectively; Described gas displacement assembly is used for the air displacement of described high low temperature experimental box is become high-purity gas nitrogen of ultralow dew point, the described heat insulation module that is rapidly heated is used for described high low temperature experimental box inside was heated to the temperature that needs and keeps this temperature in a period of time, and described fast cooling heat insulation module is used for described high low temperature experimental box was cooled to the temperature that needs and keep this temperature in a period of time.
2. high/low temperature environmental simulation experimental system as claimed in claim 1, it is characterized in that described gas displacement assembly comprises liquid nitrogen storage tank, first pneumatic control valve, water-bath vaporizer, vacuum tank, pressure-reducing valve, electric heater, second pneumatic control valve, the 3rd pneumatic control valve door, cycling hot blower fan, the 4th pneumatic control valve, the 5th pneumatic control valve, the 6th pneumatic control valve;
The left branch road of the right outlet of described liquid nitrogen storage tank is connected with the import of described first pneumatic control valve, the outlet of described first pneumatic control valve is connected with the import of described water-bath vaporizer, the outlet of described water-bath vaporizer is connected with the import of described vacuum tank, the outlet of described vacuum tank is connected with the import of described pressure-reducing valve, the outlet of described pressure-reducing valve is connected with the import of described electric heater, branch road is connected with the import of described pneumatic control valve door under the outlet of described electric heater, the following outlet of described second pneumatic control valve is connected with the import of described cycling hot blower fan, the left side outlet of the described second pneumatic control valve door is connected with the import of described the 3rd pneumatic control valve, the right side outlet of described cycling hot blower fan is connected with described the 4th pneumatic control valve import, the left side outlet of described cycling hot blower fan is connected with described the 3rd pneumatic control valve outlet, the outlet of described the 4th pneumatic control valve is connected with the bottom tuyeres of described high low temperature experimental box, a left side, air port, the top outlet of high low temperature experimental box is connected with the import of described the 5th pneumatic control valve, the outlet of described the 5th pneumatic control valve communicates with atmospheric environment, and the gas after the displacement is directly discharged outdoor by described the 5th pneumatic control valve.
3. high/low temperature environmental simulation experimental system as claimed in claim 1, it is characterized in that the described heat insulation module that is rapidly heated comprises cycling hot blower fan, first pneumatic control valve, second pneumatic control valve, high low temperature experimental box, the 3rd pneumatic control valve, the 4th pneumatic control valve, electric heater, the 5th pneumatic control valve, the 6th pneumatic control valve, pneumatic stopping valve;
The right side outlet of described cycling hot blower fan is connected with the described first pneumatic control valve import, the left side outlet of cycling hot blower fan is connected with described second pneumatic control valve outlet, the outlet of described first pneumatic control valve is connected with the bottom tuyeres of described high low temperature experimental box, air port, the top upper outlet of high low temperature experimental box is connected with the import of described the 4th pneumatic control valve, the outlet of described the 4th pneumatic control valve is connected with the import of electric heater, the outlet of electric heater is connected with the import of described the 5th pneumatic control valve, the outlet of described the 5th pneumatic control valve is connected with the upper inlet of cycling hot blower fan, the left import of cycling hot blower fan is connected with the import of described the 6th pneumatic control valve, the import of described pneumatic stopping valve is connected on the pipeline between circulating fan and described first pneumatic control valve, and outlet communicates with atmospheric environment; Being rapidly heated and the soak process, by the real-time exhaust of pneumatic stopping valve, keep the pressure stability in the pilot system.
4. high/low temperature environmental simulation experimental system as claimed in claim 1, it is characterized in that described fast cooling heat insulation module comprises circulation cold air machine, first pneumatic control valve, gas-liquid heat-exchange, second pneumatic control valve, electric heater, the 3rd pneumatic control valve, liquid nitrogen control valve group, the 4th pneumatic control valve, liquid nitrogen storage tank, the 5th pneumatic control valve, process allowance vaporizer, pneumatic stopping valve;
The upper outlet of described circulation cold air machine is connected with the gas-liquid heat-exchange import, the left side outlet of circulation cold air machine is connected with the outlet of first pneumatic control valve, the outlet of gas-liquid heat-exchange is connected with the lower inlet of second pneumatic control valve, the upper outlet of second pneumatic control valve is connected with the outlet of electric heater, the import of electric heater is connected with the import of the 3rd pneumatic control valve, the outlet of the 3rd pneumatic control valve is connected with the air port, top of high low temperature experimental box, the bottom tuyeres of high low temperature experimental box is connected with the import of the 4th pneumatic control valve, the outlet of the 4th pneumatic control valve is connected with the upper inlet of circulation cold air machine, the import of first pneumatic control valve is connected with the left import of circulation cold air machine, the left side outlet of liquid nitrogen storage tank is connected with the import of the 5th pneumatic control valve, the outlet of the 5th pneumatic control valve is connected with empty import of bathing vaporizer, empty outlet of bathing vaporizer is connected with the import of described pneumatic stopping valve, on the pipeline between the electric heater outlet pneumatic control valve of the outlet access fast cooling of pneumatic stopping valve and low temperature insulating process, the left branch road of the right side outlet of liquid nitrogen storage tank is connected with the import of liquid nitrogen control valve group, the outlet of liquid nitrogen control valve group is connected with the left import of gas-liquid heat-exchange, and the left side outlet of gas-liquid heat-exchange is connected with the left side outlet of second pneumatic control valve.
5. as claim 2 or 3 or 4 described high/low temperature environmental simulation experimental systems, it is characterized in that gas nitrogen and liquid nitrogen carry out exchange heat in described gas-liquid heat-exchange inside, the heat that liquid nitrogen obtains gas nitrogen all is vaporizated into gas nitrogen, gas nitrogen obtains the latent heat of vaporization of liquid nitrogen, and temperature reduces.
6. as claim 2 or 3 or 4 described high/low temperature environmental simulation experimental systems, it is characterized in that the described empty vaporizer of bathing becomes temperature to be lower than the low wet nitrogen of environment temperature liquid nitrogen vaporization, described water-bath vaporizer is normal temperature gas nitrogen with liquid nitrogen vaporization.
7. as claim 2 or 3 or 4 described high/low temperature environmental simulation experimental systems, it is characterized in that, the operating temperature of described circulation cold air machine be-150 ℃ to normal temperature, the operating temperature of described cycling hot blower fan is normal temperature to 200 ℃.
8. as claim 2 or 3 or 4 described high/low temperature environmental simulation experimental systems, it is characterized in that, described high low temperature experimental box adopts compound insulating material to carry out wall thermal insulating, and described high low temperature experimental box is operated in the arbitrary temperature between-120 ℃～170 ℃, and insulation is more than 4 hours.
9. as claim 2 or 3 or 4 described high/low temperature environmental simulation experimental systems, it is characterized in that gas nitrogen can two-way flow in described electric heater, described electric heater operating voltage is 380V.
10. as claim 2 or 3 or 4 described high/low temperature environmental simulation experimental systems, it is characterized in that the orifice plate balanced ventilation is adopted at described high low temperature experimental box top, the bottom is adopted the orifice plate balanced ventilation equally.
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| CN103612776A (en) * | 2013-11-27 | 2014-03-05 | 北京卫星环境工程研究所 | Spray-type nitrogen thermolator |
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| CN104209076A (en) * | 2014-09-09 | 2014-12-17 | 迈普通信技术股份有限公司 | Comprehensive nitrogen utilization device |
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| CN103691500A (en) * | 2013-12-25 | 2014-04-02 | 上海交通大学 | Simulation system for high-low-temperature environment of controlled flexible cavity body |
| CN104209076A (en) * | 2014-09-09 | 2014-12-17 | 迈普通信技术股份有限公司 | Comprehensive nitrogen utilization device |
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| CN104198148B (en) * | 2014-09-16 | 2016-09-14 | 上海化工研究院 | Dual control double isolation high and low temperature impact test system with heat exchange energy-saving compensated |
| CN104503505B (en) * | 2014-12-02 | 2017-08-04 | 兰州华宇航天技术应用有限责任公司 | A kind of back-heating type gas closed-loop refrigeration heats thermoregulating system |
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| CN107942274A (en) * | 2017-11-14 | 2018-04-20 | 北京卫星环境工程研究所 | The thermocycling system of non-magnetic environment |
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| CN108195297A (en) * | 2017-12-13 | 2018-06-22 | 太原航空仪表有限公司 | A kind of micro component high/low temperature deformation measuring device |
| CN108295917A (en) * | 2018-01-16 | 2018-07-20 | 上海交通大学 | Wide temperature range uniform temperature field insulating box system and constant temperature method |
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| CN113368920B (en) * | 2021-06-07 | 2023-02-03 | 上海交通大学 | Double-cold-source large-scale high-low temperature environment simulation test system |
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