External-force-free permeable membrane sampler based on contact pin filtering and sampling

Abstract

The invention relates to a seabed permeable membrane sampler, in particular to an external-force-free permeable membrane sampler based on contact pin filtering and sampling. The sampler comprises a main cylinder body, the upper end of the main cylinder body is connected with a spring tube, and the lower end of the main cylinder body is connected with a sliding sleeve. A ceramic filter is arrangedin the sliding sleeve and sleeved with a cylindrical outer sleeve, and the upper end and the lower end of the outer sleeve are provided with an upper end cover and a lower end cover respectively and pressed. The lower end cover of the outer sleeve is also connected with a contact pin conical head; the lower end of the push rod is connected with the upper end cover of the ceramic filter, and the upper end is connected with a conical block; a contact pin is arranged in the side wall of the spring tube; the head end of the pin penetrates through the wall of the spring tube; a pressing sleeve is arranged on the spring tube above the pin sleeve; one end of a copper pipe is connected to the upper end cover of the filter, and the other end of the copper pipe penetrates through the main cylinder body and is connected to a permeable membrane sampler. The copper pipe is taken to a specific depth for sampling by the contact pin, and meanwhile, the copper pipe is prevented from being directly contacted with sediments to block the copper pipe; and the diameter of the contact pin is reduced, materials are saved, resistance in the downward insertion process is reduced, and operation is convenient.

Description

technical field [0001] The invention relates to a seabed permeable membrane sampler, and more particularly relates to a no external force permeable membrane sampler based on needle-inset filtration sampling. Background technique [0002] The ocean is a huge treasure house of resources, among which seabed gas hydrate has become an attractive potential energy resource. The use of non-external force permeable membrane samplers can provide continuous adoption power and is an ideal choice for obtaining seabed gas hydrates. The study of seabed gas hydrates is of great significance to the study of seabed microbial diversity and genetic composition. The non-external force permeable membrane sampler is an ideal driving force for seabed gas hydrate sampling, and it will be more widely used in the development of seabed resources in the future. [0003] At present, there are many permeable membrane samplers of this type. During sampling, the sampler is brought to a designated position ...

AI Technical Summary

Problems solved by technology

However, when studying water samples at a specific depth, the direct insertion method will cause great disturbance to the sediment, and at the same time, the sediment will enter the copper tube, which may block the copper tube and make it impossible to continue sampling

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