A cryogenic device for deep-sea sampling
A cryogenic device, deep-sea technology, applied in sampling devices, simultaneous control of multiple variables, instruments, etc., can solve problems such as poor interchangeability, reduced sample quality, and sample temperature exceeding the allowable value, achieving controllable insulation temperature and simple structure. Effect
Active Publication Date: 2018-12-18
ZHEJIANG UNIV
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Problems solved by technology
[0006] The passive insulation method is based on the premise that the temperature rise of the sample does not exceed the allowable value. The allowable temperature rise of the sample determines the structural size of the sampling device and the thickness of the insulating material; the temperature rise during sample recovery depends on the recovery time, sample quality and recovery time Closely related, once the sample is not recovered in time, it will inevitably cause the temperature of the sample to exceed the allowable value and reduce the quality of the sample; the heat preservation and pressure holding structures of the sampling device are integrated, and if any function fails, it needs to be replaced as a whole, and the interchangeability is poor
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[0034] The present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be noted that the following embodiments are intended to facilitate the understanding of the present invention, but do not limit it in any way.
[0035] The low temperature keeping device includes a liquid nitrogen chamber 2 and a heat preservation chamber 3 surrounded by a housing 1. The openings of the liquid nitrogen chamber 2 and the heat preservation chamber 3 are respectively fastened by the top cover 21 of the liquid nitrogen chamber and the top cover 31 of the heat preservation chamber. A through hole 311 is opened on the cover 31 , and the heat preservation chamber 3 communicates with the outside of the casing through the through hole 311 . The housing 1, the liquid nitrogen chamber top cover 21 and the heat preservation chamber top cover 31 are made of thermal insulation materials.
[0036] The liquid nitrogen chamber 2 is equipped...
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The invention discloses a low temperature preservation device for deep sea sampling, which comprises a shell provided with a liquid nitrogen room and a temperature preservation room. Openings of the liquid nitrogen room and the temperature preservation room are buckled by a top cover; the liquid nitrogen room is internally provided with a liquid nitrogen tank; the temperature preservation room isinternally provided with a temperature preservation inner tank; a temperature preservation coil pipe is wound outside the temperature preservation inner tank; the inlet end of the temperature preservation coil pipe is communicated with a liquid inlet pipe extending inside the liquid nitrogen tank; a first shutoff valve and a first one-way valve are arranged on the liquid inlet pipe; the outlet endof the temperature preservation coil pipe extends to an interlayer between the temperature preservation room and the temperature preservation inner tank; and a second one-way valve is arranged on theoutlet end. The temperature preservation mode of the low temperature preservation device is active temperature preservation, and the temperature is controllable.
Description
technical field [0001] The invention relates to the technical field of deep-sea sampling, in particular to a deep-sea sampling and heat preservation device that utilizes liquid nitrogen to actively maintain low temperature. Background technique [0002] At present, the pressure-holding technology in the fidelity sampling of deep-sea organisms, cold springs, sediments, etc. has gradually matured, but the insulation measures are single, and most of them adopt passive insulation. There are mainly the following methods: [0003] (1) Double-layer structure is adopted, and the middle interlayer is evacuated and / or filled with thermal insulation materials. The double-layer thermal insulation structure has large dimensions and high manufacturing cost; [0004] (2) Apply a thermal insulation coating on the outer layer of the sampling cylinder. There are high requirements for the compressive performance, water resistance, corrosion resistance and heat insulation of thermal insulatio...
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IPC IPC(8): G05D27/02G01N1/02
CPCG01N1/02G05D27/02
Inventor 吴世军张波杨灿军王硕
Owner ZHEJIANG UNIV