CN103341375B - High and low temperature environment simulation experiment system - Google Patents
High and low temperature environment simulation experiment system Download PDFInfo
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- CN103341375B CN103341375B CN201310241038.3A CN201310241038A CN103341375B CN 103341375 B CN103341375 B CN 103341375B CN 201310241038 A CN201310241038 A CN 201310241038A CN 103341375 B CN103341375 B CN 103341375B
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- 238000004088 simulation Methods 0.000 title claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 242
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 121
- 239000007789 gas Substances 0.000 claims abstract description 73
- 238000009413 insulation Methods 0.000 claims abstract description 40
- 238000001816 cooling Methods 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000006200 vaporizer Substances 0.000 claims abstract description 17
- 230000008676 import Effects 0.000 claims description 87
- 239000007788 liquid Substances 0.000 claims description 83
- 230000001351 cycling effect Effects 0.000 claims description 34
- 230000008569 process Effects 0.000 claims description 27
- 238000006073 displacement reaction Methods 0.000 claims description 25
- 230000007613 environmental effect Effects 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 230000008016 vaporization Effects 0.000 claims description 9
- 238000009834 vaporization Methods 0.000 claims description 9
- 238000009423 ventilation Methods 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 238000004321 preservation Methods 0.000 abstract description 5
- 238000002474 experimental method Methods 0.000 abstract 5
- 238000012360 testing method Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000011157 advanced composite material Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000003287 bathing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004172 nitrogen cycle Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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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, the in particular high/low temperature environmental simulation pilot system in liquid nitrogen refrigerating and heat supply process field.
Background technology
Along with the development of a new generation of China spacecraft technology, spacecraft function closeness increases, surface-sensitive parts increase, projected life increases, the particularly use of a large amount of advanced composite material (ACM), polymeric material, microelectronic circuits integrated level improves constantly, and makes the impact of spacecraft on space environment effect become more responsive, originally do not cause the impact of Space Special Environment effect on spacecraft of enough attention to become to become increasingly conspicuous, become and affect spacecraft long-life highly reliable key factor.The spacecraft on-orbit fault problem of Space Special Environment effect induction will become more outstanding, therefore spacecraft space particular surroundings test technology investigation is strengthened, avoid or alleviate Space Special Environment effect to satellite reliability and the impact of projected life, most important to the development of Chinese Space technology.
The pilot system that can meet spacecraft thermocycling at present has high/low temperature experimental box, this chamber system adopts electric heater to provide heat for system, liquid nitrogen spraying mode is adopted to provide cold for system, system is open-cycle system, heating or cooled gas nitrogen are by outside discharge chamber direct after high/low temperature experimental box, cause the direct waste of heat and cold, and the operating temperature of high/low temperature experimental box is generally at-50 DEG C ~+50 DEG C, operating temperature interval is narrow and small, warming and cooling rate is slow, poor temperature uniformity.Can be used in spacecraft thermocycling at present, and the high/low temperature experimental box having patent of invention does not retrieve.
High/low temperature environmental simulation pilot system of the present invention, its operating temperature is-120 DEG C ~+170 DEG C, warming and cooling rate is 3 DEG C/min ~ 10 DEG C/min, temperature uniformity is ± 3 DEG C.Test is launched mainly for the zero-g under the high and low temperature environment of satellite antenna, solar battery array.This system can also realize quick temperature change test under different high/low temperature operating condition, soak test, low-temperature insulation test simultaneously.
Summary of the invention
In order to overcome the defect 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 high-purity gas nitrogen air displacement in described high/low temperature experimental box being become ultra-low dew point, the described heat insulation module that is rapidly heated is for being heated to the temperature of needs by described high/low temperature experimental box inside and maintaining this temperature within a period of time, and described fast cooling heat insulation module is used for described high/low temperature experimental box being cooled to the temperature of needs and within a period of time, maintaining this temperature.
Preferably, described gas displacement assembly comprises liquid nitrogen storage tank, the first pneumatic control valve, water bath carburetor, vacuum tank, pressure-reducing valve, electric heater, the 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 carburetor, the outlet of described water bath carburetor 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, under the outlet of described electric heater, branch road is connected with the import of described second pneumatic control valve door, the lower outlet of described second pneumatic control valve is connected with the import of described cycling hot blower fan, the left outlet of described second pneumatic control valve door is connected with the import of described 3rd pneumatic control valve, the right outlet of described cycling hot blower fan is connected with described 4th pneumatic control valve import, the left outlet of described cycling hot blower fan exports with described 3rd pneumatic control valve and is connected, the outlet of described 4th pneumatic control valve is connected with the bottom tuyeres of described high/low temperature experimental box, the left outlet in air port, top of high/low temperature experimental box is connected with the import of described 5th pneumatic control valve, the outlet of described 5th pneumatic control valve communicates with atmospheric environment, gas after displacement is by outside the direct discharge chamber of described 5th pneumatic control valve.
Preferably, the heat insulation module that is rapidly heated described in comprises cycling hot blower fan, the first pneumatic control valve, the 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 outlet of described cycling hot blower fan is connected with described first pneumatic control valve import, the left outlet of cycling hot blower fan exports with described second pneumatic control valve and is connected, 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 4th pneumatic control valve, the outlet of described 4th pneumatic control valve is connected with the import of electric heater, the outlet of electric heater is connected with the import of described 5th pneumatic control valve, the outlet of described 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 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 soak process, by the real-time ventilation of pneumatic stopping valve, keep the pressure stability in pilot system.
Preferably, described fast cooling heat insulation module comprises circulation cold air machine, the first pneumatic control valve, gas-liquid heat-exchange, the 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, empty bath vaporizer, pneumatic stopping valve;
The upper outlet of described circulation cold air machine is connected with gas-liquid heat-exchange import, the left outlet of circulation cold air machine is connected with the outlet of the first pneumatic control valve, the outlet of gas-liquid heat-exchange is connected with the lower inlet of the second pneumatic control valve, the upper outlet of the 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 the first pneumatic control valve is connected with the left import of circulation cold air machine, the left outlet of liquid nitrogen storage tank is connected with the import of the 5th pneumatic control valve, the import that outlet and the sky of the 5th pneumatic control valve bathe vaporizer is connected, the outlet of empty bath vaporizer is connected with the import of described pneumatic stopping valve, on pipeline between the outlet access fast cooling of pneumatic stopping valve and the electric heater outlet pneumatic control valve of low-temperature insulation process, the left branch road of the right 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, the left outlet of gas-liquid heat-exchange exports with the left of the second pneumatic control valve and is connected.
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 is all vaporizated into gas nitrogen, and gas nitrogen obtains the latent heat of vaporization of liquid nitrogen, and temperature reduces.
Preferably, liquid nitrogen vaporization becomes temperature lower than the low wet nitrogen of environment temperature by described sky bath vaporizer, and liquid nitrogen vaporization is normal temperature gas nitrogen by described water bath carburetor.
Preferably, the operating temperature of described circulation cold air machine be-150 DEG C to normal temperature, the operating temperature of described cycling hot blower fan is normal temperature to 200 DEG C.
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 DEG C ~ 170 DEG C, is incubated more than 4 hours.
Preferably, gas nitrogen can two-way flow in described electric heater, and described electric heater operating voltage is 380V.
Preferably, described high/low temperature experimental box top adopts orifice plate balanced ventilation, and bottom adopts orifice plate balanced ventilation equally.
Compared with prior art, beneficial effect of the present invention is as follows:
(1) pneumatic stopping valve automatic vent is adopted according to the change of pressure in system, pressure in regulating system, avoid the liquid nitrogen waste under traditional high-low temperature chamber system open type mode of heating, and High Temperature Gas nitrogen directly discharges the problem such as heat waste and environmental thermal pollution caused after heat exchange, greatly reduce the load of electric heater simultaneously, save the energy;
(2) according to the change of gas nitrogen pressure in system, adopt the replenishment system gas nitrogen of empty bath vaporizer low discharge, the nitrogen discharged liquid nitrogen caused of low wet optimizing traditional open-cycle system is wasted and loss of refrigeration capacity, greatly reduces the cold supply of system;
(3) top adopts orifice feeding, bottom adopts orifice feeding equally, and according to gas flow characteristic, fast cooling and low-temperature insulation process adopt the air supply mode sent next time, the air supply mode being rapidly heated and serving back under soak employing, not only increase the temperature homogeneity in high/low temperature experimental box, and decrease system pressure drop, decrease blower fan load;
(4) high/low temperature experimental box adopts the wall thermal insulating mode of complex heat-preservation, and when can realize-120 DEG C ~+170 DEG C temperature range work, high/low temperature experimental box outer surface does not condense;
(5) circulation Cooling and heating blower system is adopted, circulation Cooling and heating blower selects suitable operating temperature section operation separately, ensure that the dependability of circulating fan, improve the service life of circulating fan, and ensure that the large temperature difference of integrated environment simulation system is run.
Certainly, implement arbitrary product of the present invention might not need to reach above-described all advantages simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment provided by the invention.
Detailed description of the invention
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 high-purity gas nitrogen air displacement in described high/low temperature experimental box 47 being become ultra-low dew point, the described heat insulation module that is rapidly heated is for being heated to the temperature of needs by described high/low temperature experimental box 47 inside and maintaining this temperature within a period of time, and described fast cooling heat insulation module is used for described high/low temperature experimental box 47 being cooled to the temperature of needs and within a period of time, maintaining this temperature.
Embodiment 1
Described gas displacement assembly comprises liquid nitrogen storage tank 48, pneumatic control valve 70, water bath carburetor 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 the right outlet of liquid nitrogen storage tank 48 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 carburetor 53, the outlet of water bath carburetor 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, under the outlet of electric heater 66, branch road is connected with the import of pneumatic control valve door 67, in this process, the pneumatic control valve door 59 of the upper branch road of electric heater 66 outlet is closed, the lower outlet of pneumatic control valve door 67 is connected with the import of cycling hot blower fan 64, the left outlet of pneumatic control valve door 67 is connected with the import of pneumatic control valve 63, the right outlet of cycling hot blower fan 64 is connected with pneumatic control valve 70 import, the left outlet of cycling hot blower fan 64 exports with pneumatic control valve 63 and is connected, the outlet of pneumatic control valve 70 is connected with the bottom tuyeres of high/low temperature experimental box 47, the left outlet in air port, top 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, in replacement process, pneumatic control valve 69 cuts out, the outlet of pneumatic control valve 68 communicates with atmospheric environment.Gas after displacement is by outside pneumatic control valve 68 directly discharge chamber.
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 outlet of cycling hot blower fan 64 is connected with pneumatic control valve 70 import, the left outlet of cycling hot blower fan 64 exports with pneumatic control valve 63 and is connected, 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, the left outlet in air port, top 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, 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 pneumatic control valve 70, and outlet communicates with atmospheric environment, being rapidly heated and soak process, by the real-time ventilation of pneumatic stopping valve 65, keeps the pressure stability in 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, empty bath vaporizer, pneumatic stopping valve 51;
The upper outlet of circulation cold air machine 62 is connected with gas-liquid heat-exchange 60 import, the left 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, the import of pneumatic control valve 61 is connected with the left import of circulation cold air machine 62.The left outlet of liquid nitrogen storage tank 48 is connected with the import of pneumatic control valve 49, the import that outlet and the sky of pneumatic control valve 49 bathe vaporizer 50 is connected, the outlet of empty bath vaporizer 50 is connected with the import of pneumatic stopping valve 51, the outlet access fast cooling of pneumatic stopping valve 51 and the electric heater 66 of low-temperature insulation process export on the pipeline between pneumatic control valve 59, the left branch road of the right 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, the left outlet of gas-liquid heat-exchange 60 exports with the left of pneumatic control valve 59 and is connected.Liquid nitrogen control valve group 56 is 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 after suitable flow through pneumatic control valve 52 and enters water bath carburetor 53, liquid nitrogen flows into vacuum tank 54 be vaporized into normal temperature gas nitrogen in water bath carburetor 53 after, after pressure stability, electric heater 66 is flowed into after pressure-reducing valve 55 reduces pressure setting pressure, gas nitrogen is heated to the gas nitrogen of design temperature in electric heater 66, after pneumatic control valve 67 adjust flux, high/low temperature experimental box 47 is entered from high/low temperature experimental box 47 bottom tuyeres under the driving of cycling hot blower fan 64, purge the air in high/low temperature experimental box 47, mist after displacement is by outside pneumatic control valve 68 discharge chamber, the object of replacement process is mainly in order to be replaced as the high-purity gas nitrogen of ultra-low dew point by the humid air in former casing, plated film parts very responsive to humidity in protection space product.
The operation principle of heat insulation module of being rapidly heated is: after displacement, high-purity gas nitrogen is full of in system, gas nitrogen is electrically heated device 66 and heats, high/low temperature experimental box 47 is entered under the driving of cycling hot blower fan 64, with laboratory's heat exchange, test indoor temperature raises, gas nitrogen temperature after heat exchange reduces, the lower wet nitrogen of temperature flows into electric heater 66 again, high/low temperature experimental box 47 is entered after being heated to form the gas nitrogen of higher temperature, so repeatedly, high/low temperature experimental box 47 is finally heated to the temperature of default, and keeps running at this temperature being not less than 4 hours.In this enclosed warming cycle, along with the rising of high/low temperature experimental box 47 system temperature, intrasystem gas nitrogen density reduces, volumetric expansion.Therefore, in order to ensure that pressure stability in high/low temperature experimental box 47 is at about 300Pa, pneumatic stopping valve 65 is opened in real time automatically according to the requirement of control system, by outside excessive gas discharge chamber.
The operation principle of fast cooling heat insulation module is: after displacement, high-purity gas nitrogen is full of in system, gas nitrogen and gas-liquid heat-exchange 60 heat exchange are cooled and lower the temperature, gas nitrogen after cooling enters high/low temperature experimental box 47 from the air port, top of high/low temperature experimental box 47 under the driving of circulation cold air machine 62, with laboratory's heat exchange, test indoor temperature reduces, gas nitrogen temperature after heat exchange raises, the gas nitrogen that temperature is higher flows into gas-liquid heat-exchange 60 again, high/low temperature experimental box 47 is again entered by the gas nitrogen after cold cooling gas nitrogen, so repeatedly, thermocycling is finally cooled to the cryogenic temperature of default, and keep running at this temperature being 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 system, intrasystem gas nitrogen density increases, and the pressure in high/low temperature experimental box 47 reduces.Therefore, in order to ensure that pressure stability in high/low temperature experimental box 47 is at 300Pa, the gas nitrogen from sky bath vaporizer 50 enters SAPMAC method system under the real-time unlatching of pneumatic stopping valve 51, supplements gas nitrogen, pressure stability in holding chamber.
The replacement process of this displacement apparatus concrete 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 closedown and stopped status.The liquid nitrogen that liquid nitrogen storage tank 48 flows out is vaporized into normal temperature gas nitrogen in water bath carburetor 53, and be heated into the gas nitrogen higher than environment temperature through electric heater 66, enter high/low temperature experimental box 47, air in high/low temperature experimental box 47 is replaced, mist after displacement is by outside pneumatic control valve 68 discharge chamber, all the time the hydrone content in high/low temperature experimental box 47 is detected in replacement process, when the content of corresponding hydrone makes the dew-point temperature of high/low temperature experimental box 47 inside below-50 DEG C, replacement process terminates.
The course of work of this heat insulation module that is rapidly heated concrete 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 open and close pneumatic stopping valve 65 in real time according to the pressure feedback confidence in high/low temperature experimental box 47.Other valves of system and equipment are in closedown and stopped status.Gas nitrogen is under the driving of cycling hot blower fan 64, at system Inner eycle, high/low temperature experimental box 47 constantly obtains by gas nitrogen cycle the heat that electric heater 66 is supplied to gas nitrogen, temperature rises gradually, when the temperature in high/low temperature experimental box 47 is elevated to design temperature, in adjustment System electric heater 66 add heat, make the keeping warm mode under system held design temperature, and be incubated the long period.As can be seen from the heat cycles flow process of system, compared 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 supply high/low temperature experimental box 47 from gas-liquid heat-exchange 60, temperature in high/low temperature experimental box 47 reduces gradually, when being reduced to fixed temperature, supplied by the cold of liquid nitrogen control valve group 56 regulating system, make high/low temperature experimental box 47 be in keeping warm mode, and be incubated the long period.In this cyclic process, by detecting the pressure change in high/low temperature experimental box 47, regulating the opening and closing of pneumatic stopping valve 51 and pneumatic control valve 49 in real time, keeping the pressure stability in high/low temperature experimental box 47.As can be seen from fast cooling and the low-temperature insulation circulation process of system, compared with traditional open type high/low temperature experimental box 47 system, this closed circulation system can reduce the demand of gas nitrogen significantly, and reduces 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 is vaporizated into system by water bath carburetor 53 and provides displacement and circulating air nitrogen; Bathing vaporizer 50 by sky is system fast cooling process and low-temperature insulation process supply circulating air nitrogen, the feature of gas-liquid heat-exchange 60 is: gas nitrogen and liquid nitrogen carry out exchange heat in gas-liquid heat-exchange 60 inside, the heat that liquid nitrogen obtains gas nitrogen is all vaporizated into gas nitrogen, gas nitrogen obtains the latent heat of vaporization of liquid nitrogen, and temperature reduces.Gas nitrogen after liquid nitrogen vaporization and the gas nitrogen after lowering the temperature mix in the exit of gas-liquid heat-exchange 60, and this structure of gas-liquid heat-exchange 60 can utilize the latent heat of vaporization and the sensible heat of liquid nitrogen more fully; The feature of liquid nitrogen control valve group 56 is: liquid nitrogen control valve group 56 is made up of the pneumatic control valve of two different latus rectums, and the flow adjustment range of two control valves is different, can the cold supply scope of more effective adjustment gas-liquid heat-exchange 60; The feature of empty bath vaporizer 50 is: liquid nitrogen is vaporized into the low wet nitrogen of temperature lower than environment temperature completely in sky bath vaporizer 50, and vapourizing temperature can regulate within the specific limits; Liquid nitrogen is vaporized into normal temperature gas nitrogen completely in water bath carburetor 53; The operating temperature of circulation cold air machine 62 be-150 DEG C to normal temperature, and outer surface does not condense in the course of the work; The operating temperature of cycling hot blower fan 64 is normal temperature to 200 DEG C, and hull-skin temperature is no more than 40 DEG C 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 arbitrary temperature between-120 DEG C ~ 170 DEG C, and insulation more than 4 hours, temperature uniformity is ± 3 DEG C, and outer surface does not condense.Laboratory top adopts orifice plate balanced ventilation, and bottom adopts orifice plate balanced ventilation equally.According to gas flow principles, in fast cooling and low-temperature insulation process, high/low temperature experimental box 47 adopts air port, top to blow, the air supply mode of bottom tuyeres return air; Be rapidly heated with in soak process, high/low temperature experimental box 47 adopts bottom tuyeres to blow, the air supply mode of air port, top return air; Air supply mode in replacement process be rapidly heated identical with 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 insulation process has overlap at the import and export of high/low temperature experimental box 47.
The disclosed preferred embodiment of the present invention just sets forth the present invention for helping above.Preferred embodiment does not have all details of detailed descriptionthe, does not limit the detailed description of the invention that this invention is only described yet.Obviously, according to the content of this description, can make many modifications and variations.This description is chosen and is specifically described these embodiments, is to explain principle of the present invention and practical application better, thus makes art technical staff understand well and to utilize the present invention.The present invention is only subject 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 high-purity gas nitrogen air displacement in described high/low temperature experimental box being become ultra-low dew point, the described heat insulation module that is rapidly heated is for being heated to the temperature of needs by described high/low temperature experimental box inside and maintaining this temperature within a period of time, and described fast cooling heat insulation module is used for described high/low temperature experimental box being cooled to the temperature of needs and within a period of time, maintaining this temperature.
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, the first pneumatic control valve, water bath carburetor, vacuum tank, pressure-reducing valve, electric heater, the 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 carburetor, the outlet of described water bath carburetor 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, under the outlet of described electric heater, branch road is connected with the import of described second pneumatic control valve door, the lower outlet of described second pneumatic control valve is connected with the import of described cycling hot blower fan, the left outlet of described second pneumatic control valve door is connected with the import of described 3rd pneumatic control valve, the right outlet of described cycling hot blower fan is connected with described 4th pneumatic control valve import, the left outlet of described cycling hot blower fan exports with described 3rd pneumatic control valve and is connected, the outlet of described 4th pneumatic control valve is connected with the bottom tuyeres of described high/low temperature experimental box, the left outlet in air port, top of high/low temperature experimental box is connected with the import of described 5th pneumatic control valve, the outlet of described 5th pneumatic control valve communicates with atmospheric environment, gas after displacement is by outside the direct discharge chamber of described 5th pneumatic control valve, liquid nitrogen vaporization is normal temperature gas nitrogen by described water bath carburetor.
3. high/low temperature environmental simulation experimental system as claimed in claim 1; it is characterized in that, described in the heat insulation module that is rapidly heated comprise cycling hot blower fan, the first pneumatic control valve, the 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 outlet of described cycling hot blower fan is connected with described first pneumatic control valve import, the left outlet of cycling hot blower fan exports with described second pneumatic control valve and is connected, 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 4th pneumatic control valve, the outlet of described 4th pneumatic control valve is connected with the import of electric heater, the outlet of electric heater is connected with the import of described 5th pneumatic control valve, the outlet of described 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 6th pneumatic control valve, the import of described pneumatic stopping valve is connected on the pipeline between cycling hot blower fan and described first pneumatic control valve, outlet communicates with atmospheric environment, being rapidly heated and soak process, by the real-time ventilation of pneumatic stopping valve, keep the pressure stability in 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, the first pneumatic control valve, gas-liquid heat-exchange, the 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, empty bath vaporizer, pneumatic stopping valve;
The upper outlet of described circulation cold air machine is connected with gas-liquid heat-exchange import, the left outlet of circulation cold air machine is connected with the outlet of the first pneumatic control valve, the outlet of gas-liquid heat-exchange is connected with the lower inlet of the second pneumatic control valve, the upper outlet of the 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 the first pneumatic control valve is connected with the left import of circulation cold air machine, the left outlet of liquid nitrogen storage tank is connected with the import of the 5th pneumatic control valve, the import that outlet and the sky of the 5th pneumatic control valve bathe vaporizer is connected, the outlet of empty bath vaporizer is connected with the import of described pneumatic stopping valve, on pipeline between the outlet access fast cooling of pneumatic stopping valve and the electric heater outlet pneumatic control valve of low-temperature insulation process, the left branch road of the right 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, the left outlet of gas-liquid heat-exchange exports with the left of the second pneumatic control valve and is connected, the operating temperature of described circulation cold air machine be-150 DEG C to normal temperature.
5. the high/low temperature environmental simulation experimental system as described in Claims 2 or 3 or 4, it is characterized in that, 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 is all vaporizated into gas nitrogen, gas nitrogen obtains the latent heat of vaporization of liquid nitrogen, and temperature reduces.
6. high/low temperature environmental simulation experimental system as claimed in claim 4, is characterized in that, liquid nitrogen vaporization becomes temperature lower than the low wet nitrogen of environment temperature by described sky bath vaporizer.
7. high/low temperature environmental simulation experimental system as claimed in claim 2 or claim 3, it is characterized in that, the operating temperature of described cycling hot blower fan is normal temperature to 200 DEG C.
8. the high/low temperature environmental simulation experimental system as described in Claims 2 or 3 or 4, 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 DEG C ~ 170 DEG C, is incubated more than 4 hours.
9. the high/low temperature environmental simulation experimental system as described in Claims 2 or 3 or 4, is characterized in that, gas nitrogen can two-way flow in described electric heater, and described electric heater operating voltage is 380V.
10. the high/low temperature environmental simulation experimental system as described in Claims 2 or 3 or 4, is characterized in that, described high/low temperature experimental box top adopts orifice plate balanced ventilation, and bottom adopts orifice plate balanced ventilation equally.
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