Very low vibration helium storage system
A helium, cold storage technology, applied in the low temperature field, can solve the problems of increased cost, increased system cost and high price, and achieve the effect of reducing cost and reducing vibration
Active Publication Date: 2018-05-22
VACREE TECH
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Problems solved by technology
In the former scheme, the custom-made refrigerator and flexible heat transfer structure will bring about a substantial increase in cost; in the latter scheme, the price of the J-T cycle refrigerator or reverse Brayton cycle refrigerator is very high, which will also lead to an increase in system cost
Method used
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Embodiment 1
[0025] In Embodiment 1, preferably, the gas filling pipe 61 connected to the high-purity helium cylinder 66 passes through the pressure reducing valve 65, the flow meter 64, the pressure transmitter 63, and the safety valve 62, and then passes through the first connecting flange 23 to a On the heat exchanger of the stage cold head 21; the control unit 50 collects the information output by the flow meter 64 and the pressure transmitter 63 and controls the action of the safety valve 62 after processing. After the control unit 50 collects the information of the flow meter 64, it can conveniently collect the flow, and can activate the safety valve 62 when the flow is abnormal, so as to protect the system.
[0026] The present invention also provides a control method for an extremely low-vibration helium cold storage system, comprising the following steps: (A) placing the sample 42 to be tested on the sample mount 41; The helium in the chamber 10 is cooled until the temperature is ...
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The invention relates to the technical field of low temperature, in particular to a super-low-vibration helium cold accumulation system. The system comprises a helium cavity, a refrigerator and a compressor connected with the refrigerator. The helium cavity is hollow, a chamber for containing helium is formed, one end of the helium cavity is connected with a cold end of the refrigerator, and the other end of the helium cavity is connected with a sample mounting seat. A sample to be tested is fixedly mounted on the sample mounting seat. Meanwhile, the invention discloses a control method of the system. The helium cavity is formed, after the refrigerator is shut down, the low-temperature helium in the helium cavity is used for providing cold capacity for the sample without influencing the temperature state of the cooled sample, a main vibration source disappears, vibration is greatly reduced, and the stability of the position of the cooled sample meets test requirements. Meanwhile, the common refrigerator is adopted in the system, and it is unnecessary to adopt a low-vibration refrigerator or a flexible heat transfer structure, so that cost is greatly reduced.
Description
technical field [0001] The invention relates to the field of low temperature technology, in particular to an extremely low-vibration helium cold storage system. Background technique [0002] With the continuous development of science and technology, scientific research under extreme conditions (such as ultra-low temperature and extremely low vibration conditions) has attracted more and more attention from researchers. At present, there are mature 4K G-M refrigerators and pulse tube refrigerators on the market, which make it easier to cool the sample to 4.2K than using liquid helium. It will inevitably affect the position of the cooling sample. These vibrations generally come from four aspects: (1) vibration caused by the operation of the cold head motor of the refrigerator; (2) vibration caused by the reciprocating motion of the cold head cylinder of the refrigerator; (3) The operation of the compressor brings vibration; (4) The helium tube between the compressor and the co...
Claims
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IPC IPC(8): G01N1/42
CPCG01N1/42
Inventor 何超峰丁先庚郁欢强董相文孙兴中戴建彪张海峰卞荣耀李阳陈耀锋张俊峰武义锋章学华
Owner VACREE TECH