CN101852703B - Ultra-low temperature constant temperature grabbing bar device - Google Patents
Ultra-low temperature constant temperature grabbing bar device Download PDFInfo
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- CN101852703B CN101852703B CN 201010184103 CN201010184103A CN101852703B CN 101852703 B CN101852703 B CN 101852703B CN 201010184103 CN201010184103 CN 201010184103 CN 201010184103 A CN201010184103 A CN 201010184103A CN 101852703 B CN101852703 B CN 101852703B
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Abstract
The invention discloses an ultra-low temperature constant temperature grabbing bar device, comprising a refrigeration system, a constant temperature system, a temperature measurement system and a grabbing system. The ultra-low temperature constant temperature grabbing bar device is characterized in that the refrigeration system is a Dewar flask with pressure; the constant temperature system consists of a constant temperature tank, a heating chip and a temperature controller; the temperature measurement system consists of a temperature sensor, a patrol detector and a computer; the grabbing system is a grabbing bar which is a metal hollow bar with an internal counter-flow heat exchange device, wherein the constant temperature tank is heated so that the liquid nitrogen in the constant temperature tank is gasified to obtain low-temperature nitrogen; the counter-flow heat exchange device in the grabbing bar makes the nitrogen flowing in subjected to counter-flow heat exchange so as to obtain an outer wall of the grabbing bar with uniform and constant temperature at any position; the temperature measurement system acquires and monitors the temperature values of the temperature measurement points of the outer wall of the grabbing bar in real time, so as to ensure that the temperature of the grabbing bar meets the technical requirement. The invention can provide the ultra-low temperature from room temperature to 130 DEG C below zero and the constant temperature (the temperature change of the bar is less than 2 DEG C and the temperature difference between the two ends of the bar is less than 3 DEG C) according to the test requirement, realizes the ultra-low temperature constant temperature grabbing bar and performs low-temperature resistance ability test on a pair of low-temperature protective gloves.
Description
(1) technical field:
The present invention relates to a kind of ultralow temperature (130 ℃) constant temperature for test gloves antifreezing protection ability (temperature difference＜3 ℃) grabbing bar device.
(2) background technology:
All can run into the situation of dressing gloves grasping ultralow temperature (100 ℃) object in fields such as space flight, low-temperature superconducting and liquid nitrogen refrigeratings, these type of gloves must have good antifreezing protection ability.But at present cryogenic glove does not have corresponding proving installation and estimates the special-purpose ultra-low temperature grip rod that its performance, particularly probe temperature be lower than-100 ℃ and not yet occur.The present invention can be according to test request, and ultra-low temperature constant temperature grabbing bar from normal temperature to-130 ℃ (excellent temperature variation＜2 ℃, the two sections temperature difference＜3 of rod ℃) is provided, and is used for the test of Different hypothermia protective gloves low temperature tolerance ability.
(3) summary of the invention:
The object of the invention is to design a kind of ultra-low temperature constant temperature grabbing bar device, be used for the low temperature tolerance ability of test for low temperature protective gloves.According to test request, the grip bars from normal temperature to-130 ℃ can be provided, and can satisfy the upper temperature of rod evenly constant (excellent temperature variation＜2 ℃, the two sections temperature difference＜3 of rod ℃).But utilize this proving installation examination gloves low temperature tolerance ability whether to reach relevant criterion.
The present invention is a kind of ultra-low temperature constant temperature grabbing bar device, and as shown in Figure 1, this device mainly is divided into 4 parts: refrigeration system, constant temperature system, temp measuring system and grasping system.
Refrigeration system provides ultralow temperature for the pressure Dewar flask is arranged by the liquid nitrogen in the bottle.
Constant temperature system comprises thermostatic tank, heating plate, temperature controller.The major function of constant temperature system obtains low temperature nitrogen with liquid nitrogen gasification, and the temperature by liquid nitrogen valve and heating plate temperature control nitrogen guarantees the low temperature nitrogen temperature constant and reaches requirement of experiment.
Temp measuring system is comprised of temperature sensor, logging and computing machine.Major function is collection, Real-Time Monitoring and the temperature value that records point for measuring temperature, guarantees that the temperature of constant temperature rod reaches requirement of experiment.
The grasping system body is grip bars.Grip bars is the metal hollow rod of a built-in countercurrent heat exchange device.Its countercurrent heat exchange device is eight heat conduction baffles.Cryogenic nitrogen air-flow in the countercurrent heat exchange device is lowered the temperature to excellent outer wall.The function of countercurrent heat exchange device is that the nitrogen that flows into is carried out countercurrent heat exchange, so that grip bars temperature assurance everywhere is evenly constant.
As shown in Figure 1, refrigeration system A is the core that realizes ultralow temperature.There is the liquid nitrogen of pressing in the Dewar flask 8 to enter constant temperature system B.The main body of constant temperature system B is thermostatic tank 2.Liquid nitrogen enters thermostatic tank 2 by liquid nitrogen entrance 10, and therein gasification is expanded to ultralow temperature nitrogen.Liquid nitrogen needs to absorb heat in being gasificated as the process of nitrogen, heating plate 3 on the thermostatic tank outer wall provides this heat by being added in, and the temperature of heating plate is by temperature controller 4 controls.If the output nitrogen temperature is too high, can opens liquid nitrogen compensation valve 13 and compensate.Can control realization by two valves on the regulating thermostatic tank 2 (liquid nitrogen valve 11, liquid nitrogen compensate valve 13) and the temperature of heating plate 3 from the temperature of the low temperature nitrogen of nitrogen outlet 14 output.Thermostatic tank 2 outer wrapping heat-insulation layers 17 adopt insulation material (such as asbestos, cotton etc.) to be incubated, and the cold of low temperature nitrogen and the heat of heating plate are remained in the insulation material, avoid too much thermal loss.Constant temperature tank body pressure gauge 16 can be used to monitor gaseous tension in the tank, guarantees that it is in the experimental pressure scope of setting.
Temp measuring system C is by temperature sensor 5 thermometrics, temperature sensor 5 links to each other with logging 6, can be converted to digital signal to temperature signal, logging 6 output termination computing machines 7, can show in real time grip bars 1 outside wall temperature by the temperature data acquisition software based on the KingView Development of Software Platform, instruct the aperture of valve.
Low temperature nitrogen enters the D of grasping system by Dewar pipe 9.The core of the D of grasping system is grip bars 1, and built-in eight heat conduction baffles 20 wherein, low temperature nitrogen are divided into four route nitrogen inlets 18 and flow into, and nitrogen outlet 19 flows out, and flows along direction shown in the arrow in rod.Heat conduction baffle 20 both sides nitrogen carry out countercurrent heat exchange, make excellent two ends temperature keep evenly constant, do not produce the larger temperature difference because of ectocine.
The present invention is a kind of ultra-low temperature constant temperature grabbing bar device, its advantage and function are: have and press that liquid nitrogen is low-temperature receiver in the Dewar flask, utilize thermostatic tank to obtain evenly constant ultralow temperature nitrogen stream, and make nitrogen countercurrent flow in rod by the countercurrent heat exchange device in the grip bars, evenly constant to obtain the grip bars outside wall temperature.The grip bars of ultralow temperature, constant temperature, the little temperature difference can be provided, thereby the low temperature tolerance ability of gloves is carried out evaluation test.
(4) description of drawings:
Fig. 1. ultra-low temperature constant temperature grabbing bar device schematic diagram of the present invention
1. grip bars 2. thermostatic tanks 3. heating plates
4. temperature controller 5. temperature sensors 6. loggings
7. computing machine 8. has the Dewar flask of pressure 9. Dewar pipes
A. refrigeration system B. constant temperature system C. temp measuring system
D. grasp system
Fig. 2. thermostatic tank fluid inlet and outlet schematic diagram
10. liquid nitrogen entrance 11. liquid nitrogen valves 12. liquid nitrogen compensate entrance
13. liquid nitrogen compensation valve 14. ultralow temperature nitrogen outlets 15. ultralow temperature nitrogen valves
16. tank body pressure gauge 17. heat-insulation layers
Fig. 3. grip bars heat conduction baffle schematic diagram
18. nitrogen inlet 19. nitrogen outlets 20. heat conduction baffles
(5) embodiment:
Below in conjunction with accompanying drawing, how the present invention is implemented to be further described:
The present invention is a kind of ultra-low temperature constant temperature grabbing bar device, and as shown in Figure 1, this device mainly is divided into 4 parts: refrigeration system A, constant temperature system B, temp measuring system C and grasps the D of system.Refrigeration system A provides ultralow temperature for the Dewar flask 8 of pressure is arranged by the liquid nitrogen in the bottle.The major function of constant temperature system B is with liquid nitrogen gasification, obtains low temperature nitrogen, and the temperature by liquid nitrogen valve and heating plate temperature control nitrogen guarantees the low temperature nitrogen temperature constant and reaches requirement of experiment.The major function of temp measuring system C is collection, Real-Time Monitoring and the temperature value that records point for measuring temperature, guarantees that the temperature of grip bars reaches requirement of experiment.The D of grasping system is grip bars 1, is the metal hollow rod of a built-in countercurrent heat exchange device.Its countercurrent heat exchange device is eight heat conduction baffles 20.Cryogenic nitrogen air-flow in the countercurrent heat exchange device is lowered the temperature to excellent outer wall.The function of countercurrent heat exchange device is that the nitrogen that flows into is carried out countercurrent heat exchange, so that grip bars temperature assurance everywhere is evenly constant.As shown in Figure 1, have the liquid nitrogen of pressing in the Dewar flask 8 to enter constant temperature system B by pipeline, enter thermostatic tank 2 by liquid nitrogen entrance 10, therein gasification is expanded to ultralow temperature nitrogen.Liquid nitrogen absorbs the heat that the heating plate 3 on the thermostatic tank outer wall provides in being gasificated as the process of nitrogen, the temperature of heating plate is controlled by temperature controller 4.Can control by the temperature of two valves on the regulating thermostatic tank 2 (liquid nitrogen valve 11, liquid nitrogen compensation valve 13) and heating plate 3 temperature of output nitrogen.When nitrogen temperature is too high, can opens liquid nitrogen compensation valve 13 and compensate.Thermostatic tank 2 outer wrapping heat-insulation layers 17 adopt insulation material (such as asbestos, cotton etc.) to be incubated, and the cold of low temperature nitrogen and the heat of heating plate are remained in the insulation material, avoid too much thermal loss.Utilize constant temperature tank body pressure gauge 16 to monitor gaseous tension in the tank, guarantee that it is in the experimental pressure scope of setting.Low temperature nitrogen enters the D of grasping system by Dewar pipe 9, and the nitrogen inlet 18 that is divided into four route grip bars 1 flows into, and nitrogen outlet 19 flows out, and flows along direction shown in the arrow in rod.Heat-conducting plate 20 both sides nitrogen carry out countercurrent heat exchange, make the upper temperature of rod keep evenly constant, do not produce the larger temperature difference because of ectocine.Point for measuring temperature on the grip bars 1 connects temp measuring system C, by temperature sensor 5 thermometrics, temperature sensor 5 links to each other with logging 6, can be converted to digital signal to temperature signal, logging 6 output termination computing machines 7, show in real time grip bars 1 outside wall temperature by the temperature data acquisition software based on the KingView Development of Software Platform, instruct the aperture of valve.
The implementation step of this ultra-low temperature constant temperature grabbing bar device is as follows:
Claims (3)
1. a ultra-low temperature constant temperature grabbing bar device comprises 4 parts: refrigeration system, constant temperature system, temp measuring system and grasping system; Described refrigeration system is for there being the pressure Dewar flask, and described constant temperature system is comprised of thermostatic tank, heating plate, temperature controller, and described temp measuring system is comprised of temperature sensor, logging and computing machine, and described grasping system body is grip bars; It is characterized in that:
Described refrigeration system is to realize the core of ultralow temperature, provides ultralow temperature by the liquid nitrogen of pressing in the Dewar flask is arranged;
Described constant temperature system obtains low temperature nitrogen mainly with liquid nitrogen gasification, by regulating the temperature of liquid nitrogen valve and heating plate temperature control nitrogen, guarantees the low temperature nitrogen temperature constant and reaches requirement of experiment;
Described temp measuring system instructs the aperture of liquid nitrogen valve by temperature sensor test grip bars outside wall temperature;
The core of described grasping system is grip bars, and grip bars is the metal hollow rod of a built-in countercurrent heat exchange device;
There is the liquid nitrogen of pressing in the Dewar flask to enter constant temperature system by pipeline in the described ultra-low temperature constant temperature grabbing bar device, enter thermostatic tank by the liquid nitrogen entrance, therein gasification is expanded to ultralow temperature nitrogen, low temperature nitrogen enters the grasping system by the Dewar pipe, nitrogen inlet by grip bars flows into, nitrogen outlet flows out, point for measuring temperature on the grip bars connects temp measuring system, by the temperature sensor thermometric, temperature sensor links to each other with logging, can be converted to digital signal to temperature signal, logging output termination computing machine, show in real time the grip bars outside wall temperature by the temperature data acquisition software based on the KingView Development of Software Platform, instruct the aperture of liquid nitrogen valve; Ultra-low temperature constant temperature grabbing bar device can be realized-130 ℃ of ultra-low temperature constant temperatures, and excellent temperature variation is less than 2 ℃, and two sections temperature difference of rod are carried out the low temperature tolerance ability test less than 3 ℃ to cryogenic glove.
2. ultra-low temperature constant temperature grabbing bar device according to claim 1, it is characterized in that: ultra-low temperature constant temperature grabbing bar device adopts liquid nitrogen to freeze, liquid nitrogen absorbs the heat that heating plate provides on the thermostatic tank outer wall in being gasificated as the process of nitrogen, can control the temperature of output nitrogen by the temperature of the liquid nitrogen valve on the regulating thermostatic tank and liquid nitrogen compensation valve and heating plate, thereby make grip bars reach the desired ultralow temperature of experiment.
3. ultra-low temperature constant temperature grabbing bar device according to claim 1 is characterized in that: grip bars is the metal hollow rod of a built-in countercurrent heat exchange device; Its countercurrent heat exchange device is eight heat conduction baffles, and the cryogenic nitrogen air-flow in the countercurrent heat exchange device is lowered the temperature to excellent outer wall; The function of countercurrent heat exchange device is that the nitrogen that flows into is carried out countercurrent heat exchange, so that grip bars temperature assurance everywhere is evenly constant.
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| CN 201010184103 CN101852703B (en) | 2010-05-26 | 2010-05-26 | Ultra-low temperature constant temperature grabbing bar device |
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| CN 201010184103 CN101852703B (en) | 2010-05-26 | 2010-05-26 | Ultra-low temperature constant temperature grabbing bar device |
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| CN101852703A CN101852703A (en) | 2010-10-06 |
| CN101852703B true CN101852703B (en) | 2013-04-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102353583B (en) * | 2011-07-14 | 2013-04-17 | 兰州大学 | Temperature control system for superconducting material mechanical property test system |
| CN102353582B (en) * | 2011-07-14 | 2013-04-17 | 兰州大学 | Low temperature experiment box for testing mechanical properties of superconducting material |
| CN104390847A (en) * | 2014-11-26 | 2015-03-04 | 苏州市职业大学 | Freezing apparatus for separated Hopkinson pole experiment measurement |
| CN108871223B (en) * | 2018-08-22 | 2020-08-14 | 西安空间无线电技术研究所 | Satellite antenna thermal deformation automatic measurement system and method |
| CN109187220B (en) * | 2018-09-04 | 2021-09-24 | 北京强度环境研究所 | Low-temperature internal pressure loading method and device for airless pillow of rocket storage tank |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2156447Y (en) * | 1992-07-10 | 1994-02-16 | 石油大学(华东) | Low-temp. refrigeration and temp. controller |
| CN1305083A (en) * | 2000-12-07 | 2001-07-25 | 上海交通大学 | Low-loss low-temp enclosure with liquefied nitrogen |
| US6578367B1 (en) * | 2001-03-02 | 2003-06-17 | Ta Instruments-Waters Llc | Liquid nitrogen cooling system |
| CN101561327A (en) * | 2009-05-21 | 2009-10-21 | 北京航空航天大学 | Ultra-low temperature grip strength test device |
-
2010
- 2010-05-26 CN CN 201010184103 patent/CN101852703B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2156447Y (en) * | 1992-07-10 | 1994-02-16 | 石油大学(华东) | Low-temp. refrigeration and temp. controller |
| CN1305083A (en) * | 2000-12-07 | 2001-07-25 | 上海交通大学 | Low-loss low-temp enclosure with liquefied nitrogen |
| US6578367B1 (en) * | 2001-03-02 | 2003-06-17 | Ta Instruments-Waters Llc | Liquid nitrogen cooling system |
| CN101561327A (en) * | 2009-05-21 | 2009-10-21 | 北京航空航天大学 | Ultra-low temperature grip strength test device |
Non-Patent Citations (1)
| Title |
|---|
| 韩龙柱等.3种温度标准下的舱外航天服手套的功效评价试验研究.《航空学报》.2005,第26卷(第6期), * |
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