Low temperature test system of low temperature stretching tests
A technique of tensile test and low temperature test, which is applied in the direction of applying stable tension/pressure to test the strength of materials, and can solve problems such as not recommended use, high risk of petroleum ether, etc.
Active Publication Date: 2014-08-06
BC P INC CHINA NAT PETROLEUM CORP +1
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[0012] The whole system as figure 1 Shown in: (a) low temperature gas generating device, composed of liquid nitrogen storage tank and nitrogen cylinder; (b) gas temperature control system, composed of two sets of mesh heaters; (c) temperature measurement system, composed of five control (d) low-temperature air duct; (e) pre-cooling chamber; (f) stretching studio; the connecting pipe at the outlet of the nitrogen cylinder 1 passes into the bottom of the liquid nitrogen storage tank 2 through the air flow control valve 7, and the liquid nitrogen The outlet of the storage tank communicates with the pre-cooling chamber 5 and the stretching studio 6 respectively through the low-temperature air duct 3. Two sets of mesh heaters 4-1 and 4-2 are vertically located in the air duct before the low-temperature air duct bifurcates. The temperature control probes 12-1, 12-2, and 12-3 are respectively set in the two sets of mesh heaters and the low-temperature air ducts on both sides, and the...
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The invention relates to a low temperature test system of low temperature stretching tests. A nitrogen gas cylinder connection pipe is connected into the bottom of a liquid nitrogen storage tank through an airflow control valve, and the liquid nitrogen storage tank is connected with a pre-cooling chamber and a stretchingwork room respectively through low temperature air flues. Two groups of net-shaped heaters are vertically arranged in anair flue of the low temperature air flue before forking, three temperature control probes are respectively arranged between the two net-shaped heaters and in the low temperature air flue on the two sides, and two temperature control probes are respectively arranged in the pre-cooling chamber and the stretching work room. High-vacuum heat insulation materials are filled at the bottom and the lateral wall of the stretching work room, an upper chuck and a lower chuck are respectively arranged on an upper cover plate and the bottom of the stretching work room and are respectively connected with an upper chuck and a lower chuck of a stretcher in matched mode, thermally refined medium carbon steel is adopted for the upper chuck and the lower chuck of the low temperature stretching work room, 9Ni steel is adopted for the inner wall of a low temperature box, and the internal diameter is matched with a rod-like sample. The low temperature test system can ensure that a stable working interval with temperature ranging from -100 DEG C to -196 DEG C can be obtained in the low temperature stretching work room.
Description
technical field [0001] The invention relates to a low-temperature tensile test system capable of adjusting the temperature within the range of -100°C to 196°C under normal pressure, which is used for stretching metal rod-shaped samples at a certain low temperature. Background technique [0002] In the existing technology, temperature control from 0°C to -100°C can be obtained by a mixed solution of alcohol and liquid nitrogen. The most convenient and economical way to achieve a temperature range of -100°C to 196°C is to use the low temperature and latent heat of vaporization of liquid nitrogen at atmospheric pressure. For example: through a small stepping motor, adjust the position of the sample in the low temperature space above the liquid nitrogen container to make the sample reach the required low temperature. This method is more flexible and convenient to adjust, and its disadvantages are that the liquid nitrogen container is open, the liquid consumption is large, the s...
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IPC IPC(8): G01N3/18
Inventor 熊庆人霍春勇赵文轸孙良吉玲康
Owner BC P INC CHINA NAT PETROLEUM CORP