A sediment sampler driven by hydrostatic pressure

Abstract

The invention relates to a sediment sampler driven by hydrostatic pressure. The prior device has finite depth, large and bulky support frame. The invention includes assignment components, drive components, impact components, and sampling pipe fittings. The impact components, include a cylinder, an impact piston cylinder and a slide piston; the assignment components includes a support tube, a flat valve and acompression spring; drive components includes a drive piston cylinder and a drive piston; the sampling tube device includes a sampling tube, an one-way valve and a retaining ring. The invention combines two kinds of drive forms, 'gravity-driven' and 'vibration-driven', can use the gravity force potential energy of the sampler itself and fairly considerable hydrostatic pressure to deeper sampling depth increase the sample collection rate.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment, and relates to a drilling coring suitable for various types of soft rock formations on the seabed, such as sediment, soil, frozen soil, ice, and especially suitable for sampling driven by hydrostatic pressure for drilling and coring of sediments. device. technical background [0002] The ocean accounts for 70.78% of the total area of ​​the earth, and it is of great scientific significance to sample and study the seabed sediments that are widely covered in the depths of the ocean. For deep-sea sediment samplers, the ideal situation is that both soft and hard sediments can be collected, which can adapt to the complex working conditions of the seabed and reduce the weight of equipment. However, traditional gravity samplers and vibration samplers have their disadvantages. The gravity sampler has the advantages of easy operation and long sampling tube, but it can only be used for soft se...

AI Technical Summary

Problems solved by technology

For deep-sea sediment samplers, the ideal situation is: both soft and hard sediments can be collected, and can adapt to the complex working conditions of the seabed and lightweight equipment, while traditional gravity samplers and vibration samplers have their disadvantages

The gravity sampler has the advantages of easy operation and long sampling tube, but it can only be used for soft sediment sampling. When it is used for hard sediment sampling, the insertion depth is limited, and this type of sampler is top-heavy and long in length. Under the influence of various factors, it is difficult to vertically insert the seabed sediment (such as: CN02150917.4; CN02156223.7; CN200420044638.7); for the vibration sampler, it is very suitable for sampling in the harder sediment area, but its disadvantage is that The support frame is large and heavy, and needs to be powered from the mother ship to drive the motor or hydraulic motor. When the working depth is large, the energy supply is troublesome

Images