SU815564A1 - Deep-water hydrostatic bottom soil sampler - Google Patents

Description

(54) DEEP HYDROSTATIC SAMPLER OF THE BOTTOM SOIL

The invention relates to sampling, in particular to deep-sea hydrostatic samplers of bottom soil and can be used in the search for minerals in deep-water areas. A deep-sea hydrostatic bottom soil sampler, containing a column pipe with a lid and a piston 111, is known. The disadvantage is that, when operating at great depths, the filtration flow of pore water erodes the column of the bottom bottom sample already immersed. Closest to the proposed technical solution is a deep-sea hydrostatic sampling of bottom soil containing a column pipe with a lid having an opening, a piston installed in the column pipe with a hollow rod located in the opening of the lid, and a device for braking the piston, mainly in the form float 12. This sampler also does not ensure complete safety, and, consequently, the representativeness of the sampled bottom of the soil, as when raising the sampler to the surface in it has a month-j filtering of the soil sample of the pore aoda due to the formation of a discharge in the upper part of the core pipe under the raised piston. The purpose of the invention is to increase the representativeness of the sampled samples by eliminating the possibility of filtering the selected soil sample by pore water. This goal is achieved by the fact that the hollow rod is equipped with a movable sleeve and is made with through-hole radial holes in its upper and lower parts, while the movable sleeve is installed with the possibility of blocking the through holes of the upper part of the hollow rod, and the piston is connected to the hollow rod with the possibility of relative movement and overlapping of through radial holes in its lower part. In addition, the movable sleeve is spring-loaded relative to the hollow stem. Fig, 1 shows a sampler, a longitudinal section; in figure 2 the sampler when immersed in

ground} in FIG. 3 - at the initial moment of ascent to the surface; in fig. 4 - at the time of separation of the soil sample from the array.

Deep-sea hydrostatic bottom soil sampler consists of a core pipe 1 with a lid 2, having an opening 3 and a check valve 4, a piston - 5 with a hollow stem b, in which axial 7 and radial 8 and 9 holes are made, respectively, in the upper and lower parts of it x movable sleeve 10 mounted on the hollow stem 6 in the upper part between the flanges 11 and 12 with the ability to block the through radial holes and spring-loaded relative to the hollow rod 6 by means of a spring 13 through the flange 1 and the float 14.

The piston 5 is installed on the hollow rod b with the possibility: relative to the movement and overlapping of the through radial holes 9 in its lower part and fixed with the help of sharks 15 located in the walls of the core pipe 1.

In addition, the column tube 1 has a cutting tip 16 and a stitch valve 17 fixed in its lower part, and a support ring 18 mounted on the core tube 1 with the possibility of relative movement.

A bracket 19 is fixed on the movable sleeve 10, through which the cable 20 is passed, connecting the sampler with the floating device (not shown),

The operation of the sampler is carried out as follows.

Before immersion, it is brought to its initial position (Fig. 1) and air is pumped out of the piston cavity of the core pipe 1 through the check valve 4.

The sampler is lowered from the watercraft (not shown in the drawings) to the bottom, while its vertical position is ensured by having a support ring 18 in the bottom and a float 14 in the upper part of the core pipe 1.

When the sampler strikes the bottom of the column tube 1, it moves relative to the support ring 18 and out of its walls into the gap between it and the support ring 18, the piston 5 fixed by the piston 5 is squeezed out by the hydrostatic pressure of the water, the piston 5 with the hollow rod b moves upwards the sleeve 10 of the relative hollow rod b - down under the action of the spring 13j blocking the through radial holes 8 of the hollow rod b.

There is a further introduction of core pipe 1 in the bottom soil

under the action of hydrostatic pressure of water on the cover 2, with a deeper introduction of the core pipe

1 contributes to the presence of a small, ensuring the safety of the selected soil samples, filtration flow of pore water due to the difference between hydrostatic, water pressure and water pressure

under piston 5.

After the sampler has been inserted into the ground, it is lifted by the cable 20 to the surface. In this case, the movable sleeve 10 moves relative to the hollow rod b, opening the through radial holes 8 in its upper part and thus providing the connection of the sub-piston cavity of the core pipe 1 with the environment and avoiding further filtration of the soil sample with pore water, and the piston 5 rises up all the way to the lid

2 column pipe 1 and covers the through radial holes 9 in the lower part of the hollow rod b.

The sampled soil in-result is when the sampler is raised completely Separated from the surrounding medium.

Claims (2)

1. A deep-sea hydrostatic bottom soil sampler containing a core tube with a lid, and an opening installed In the core tube, a piston with a hollow rod located in the opening of the lid, and a device for braking the piston, mainly in the form of a float, characterized in that, in order to increase the representativeness of the samples taken by eliminating the possibility of filtering the soil sample taken with pore water, the hollow rod is equipped with a movable the sleeve and is made with through radial holes in its upper and lower parts, while the movable sleeve is installed with the possibility of blocking the through radial holes in the upper part of the hollow piece Single and connected by Zh1en hollow rod with the possibility of relative movement and overlapping through radial holes in its lower part. 2. A sampler according to claim 1, characterized in that the movable sleeve is spring-loaded relative to the hollow stem. Sources of information taken into account in the examination 1, USSR Author's Certificate 257858, cl. G 01 N 1/02, 1968. 2. Authors certificate of the USSR 622972, cl. E 21 V 49/02, 1975 (prototype),