CN113267525A - Device for cold insulation material to carry out low-temperature experiment - Google Patents
Device for cold insulation material to carry out low-temperature experiment Download PDFInfo
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- CN113267525A CN113267525A CN202110274337.1A CN202110274337A CN113267525A CN 113267525 A CN113267525 A CN 113267525A CN 202110274337 A CN202110274337 A CN 202110274337A CN 113267525 A CN113267525 A CN 113267525A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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Abstract
The invention provides a device for performing low-temperature experiments on cold insulation materials, which is characterized in that: the cold insulation box is divided into a liner and a shell double-layer structure, the middle of the cold insulation box is filled with cold insulation materials, the test box is respectively provided with an air inlet valve and an exhaust valve, the air inlet valve is connected with a liquid nitrogen tank, a flow meter is installed at the joint of the air inlet and the liquid nitrogen tank, the test box adopts a top-open cover structure, a rubber pad is arranged between a top cover and the box body, one surface of the box body is made of glass, a hanging basket is arranged in the box body as an observation window and is connected with hooks on the two sides of the box body to place dry ice, a heat insulation valve is arranged below the hanging basket and is used for adjusting the temperature of an experimental area, the object placing table is connected with the box body, the height of the object placing table can be adjusted, the scale operation platform is placed on the object placing table, and the temperature sensor is fixedly connected with the box body. The invention has the main characteristics of safety, low cost and convenient carrying, thereby improving the detection efficiency of the cold insulation material.
Description
Technical Field
The invention relates to a device for performing low-temperature experiments on cold insulation materials, in particular to a simple and multipurpose cold insulation material low-temperature experiment device.
Background
The low temperature test chamber is a device for cold insulation materials to carry out low temperature experiments, and the common low temperature material test chamber is a special fixed experimental device generally, is inconvenient to carry and has high manufacturing cost. The device for the cold insulation material low-temperature experiment has the advantages of small volume, portability, low manufacturing cost and capability of performing demonstration in a client office or on site.
Disclosure of Invention
The test box adopts a double-layer structure consisting of an inner container and an outer shell, and cold insulation materials are filled in the middle of the test box for heat insulation. The test box adopts the structure of uncapping on, and the experimental box divides the four layers at trilateral and distributes altogether has 12 measuring probe for the inside whole regional temperature of test box is looked over to the inside temperature of test box through the display. The upper part of the test box is provided with an exhaust valve and the lower part is provided with an intake valve for inputting liquid nitrogen and exhausting gaseous nitrogen generated after the liquid nitrogen in the box body is gasified. The bottom of the test box is provided with a storage table, and an operation platform with scales is placed on the storage table and can be used for measuring the shrinkage rate of the sample in a low-temperature environment. The upper part is provided with a hanging basket which can be used for placing dry ice for cooling. The test device can adjust the temperature in the test box body by adopting two refrigerants, namely dry ice and liquid nitrogen, according to the test target temperature.
Drawings
FIG. 1 is a schematic view of a front view of a planer structure of the present patent;
FIG. 2 is a schematic view of a thermal isolation valve;
fig. 3 is a schematic top view of the planer structure of the present patent.
In the figure: 1. the device comprises a top cover, 2, an exhaust valve, 3, a hook, 4, a temperature sensor, 5, a box body, 6, an operating platform, 7, a storage table, 8, a hanging basket, 9, a temperature isolating valve, 10, a shell, 11, an inner container, 12, a scale plate, 13, a flowmeter, 14, an air inlet valve, 15, an observation window, 16 and a fixing needle
Detailed Description
The technical solution in this patent will be described clearly and completely with reference to the attached drawings of this patent.
The design adopts two refrigerants of dry ice or liquid nitrogen to reduce and adjust the temperature in the test chamber.
Cooling by using dry ice: and putting dry ice into the hanging basket, fixing the test sample on the operating platform, and closing the box cover. And (5) waiting for the heat absorbed by the volatilization of the dry ice, and reducing the temperature in the box to stabilize the temperature in the box at the required temperature for a certain time. If the temperature is too low, the temperature of the test area can be adjusted through the size of the temperature isolating valve switch, and the internal temperature of the box body is improved.
And (3) cooling by adopting liquid nitrogen: fixing the experimental sample on the operating platform, and closing the box cover. And opening a valve of the liquid nitrogen tank, slowly injecting liquid nitrogen into the test box through the air inlet, reducing the temperature inside the test box, and stabilizing the temperature in the box at the required temperature for a certain time. If the temperature is too low, the flow speed and the flow can be controlled by displaying data through the flowmeter and adjusting the valve of the air inlet valve, so that the temperature in the box body is controlled.
Claims (8)
1. The utility model provides a device for cold insulation material carries out low temperature experiment, includes box (5), temperature sensor (4) and puts thing platform (7), its characterized in that: exhaust valve (2) of box upper portion installation and admission valve (14) of lower part installation, admission valve department installs flowmeter (13), install in three faces of box temperature sensor (4), every 4, 12 totally, a face of box is low temperature resistant glass material, as observation window, it installs inside the box to put thing platform (7), and is fixed with the bottom half, height-adjustable, and operation platform (6) are fixed in and put thing platform (7) on, and operation platform has scale plate (12), box (5) adopt top cover (1) structure, hanging flower basket (8) of box internally mounted are connected with inside both sides couple (3) of box, place the dry ice, be equipped with thermal insulation valve (9) below the hanging flower basket for adjust the regional temperature of experiment.
2. The device for cold insulation material low temperature test according to claim 1, characterized in that the box body (5) adopts a double-layer structure composed of the inner container (11) and the outer casing (10), which can reduce the heat exchange between the inner and the outer, thereby stabilizing the inner temperature.
3. Device for cold-keeping materials for low-temperature experiments according to claim 1, characterized in that the temperature inside the test chamber can be lowered to-196 ℃ at the lowest by adding liquid nitrogen through the air inlet valve (14) or placing dry ice in the basket (8).
4. The apparatus for cold-keeping materials for low-temperature experiments according to claim 1, wherein a plane of the box body (5) is designed to be made of glass as a viewing window (15) for observing the state of the sample in the test chamber.
5. The device for cold insulation material low-temperature experiment according to claim 1 is characterized in that a graduated operating platform (6) is arranged in the test chamber and can be used for measuring the shrinkage rate of the sample in low-temperature environment.
6. The device for cold insulation material low-temperature test according to claim 5, characterized in that the scale operating platform (6) and the scale plates (12) are arranged on two sides of the operating platform and higher than the operating surface of the platform, the fixing needle (16) is arranged at the junction of the two scale plates and used for fixing the test material, one end of the material is fixed and cannot move, the material shrinks due to cold and only moves along one direction, the overall shrinkage condition of the material is observed more intuitively, and the shrinkage rate of the material can be measured and calculated accurately.
7. The device for cold insulation material low temperature experiment according to claim 1, characterized in that, on three sides of the box body, there are distributed 12 temperature measuring probes (5) in four layers for accurately measuring the temperature of different heights inside the test box, the thermometer probe is placed at a position reserved in advance, the data of the probe for measuring the temperature is connected and transmitted to the digital display through a wire, the temperature data of each area can be collected together, and the temperature condition of each area of the box body can be conveniently and visually observed.
8. The device for cold insulation material low temperature experiment according to claim 1, wherein there are 2 through holes on the top and bottom for inputting liquid nitrogen needed by experiment and gaseous nitrogen generated by gasified liquid nitrogen in the discharge box, and the flow meter (13) can display data to control the flow of liquid nitrogen to adjust the internal temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110274337.1A CN113267525A (en) | 2021-03-15 | 2021-03-15 | Device for cold insulation material to carry out low-temperature experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110274337.1A CN113267525A (en) | 2021-03-15 | 2021-03-15 | Device for cold insulation material to carry out low-temperature experiment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113267525A true CN113267525A (en) | 2021-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110274337.1A Pending CN113267525A (en) | 2021-03-15 | 2021-03-15 | Device for cold insulation material to carry out low-temperature experiment |
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2021
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