SU851156A1 - Hydrodynamic bottom soil sampler - Google Patents

Description

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This invention relates to sampling, in particular to hydrodynamic samplers for bottom soil.

A hydrodynamic sampling of a bottom soil pickup is known, which contains a hollow cylindrical body with a plug in the upper part of the core tube and an anvil in the bottom. In this sampler, the plug is made in the form of a disk with an explosive charge and is destroyed when the core tube contacts the ground. Under the action of the water entering the hull and striking the anvil, the core pipe is introduced into the bottom soil, filling it with a sample Ij.

The disadvantages of the sampler are low operational reliability and danger of operation.

Closest to the present invention, there is a hydrodynamic bottom soil collector containing a hollow cylindrical body, a hollow firing pin installed in the upper part of the body, with a piston, retainers and a valve connecting its above piston cavity with the surrounding medium, and the core pipe and the anvil located at the bottom of the body.

at the same time the anvil is connected to the housing with a cable. The introduction of the core tube into the bottom soil in this sampler results from the impact of the striker 2 dispersed by water into it. The disadvantage of this sampler is its low efficiency in sampling a large volume and, therefore, mass.

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The purpose of the invention is to increase the efficiency of the sampler in the work when sampling a large volume.

This goal is achieved by the fact that a central hole is made in the anvil, and the head is provided with a rod passed through the hole in the anvil and connecting it to the core tube.

Figure 1 shows a sampler, a longitudinal rarere in figures 2 and 3 - the same, general view, respectively, at the moment of the beginning of the start: relocation of the striker with the core tube and completion of sampling of the bottom soil,

25 - 1 Idrodynamic grab bottom bottom soil consists of a hollow cylindrical body 1, a hollow die 2 located in the upper part of the core pipe 3 and on the upper part of the radial 4 at the bottom. Hollow

the striker 2 has a cover 5 with a valve 6 connecting its cavity with the environment, radial holes 7 with ball locks 8 located in them. Inside the striker 2 there is a piston 9 spring loaded 10 and having annular grooves 11 on the outer surface. Corresponding annular grooves 12 are made on the inner surface of the housing 1, In addition, on the housing 1, the funnel 13 is rigidly fixed, the strips 14 with 15 l edges are attached to the lever 16, which interacts with one end of the valve 6 of the striker 2, the cable end is attached to the other end of the lever 16 17 with a load of 18. The connection of the housing 1 with the striker 2 and the anvil 4 is sealed with rings 19-21. The head 2 is connected by a rod 22, passed through the central hole 23 of the anvil 4, with the core pipe 3.

The anvil 4 is connected to the hull by the cable 24. With the help of the cable 25, the sampler is connected to a lifting mechanism, for example, a winch mounted on the craft (not shown}.

The device works as follows.

The sampler is lowered on the cable 25 to the bottom of the investigated reservoir.

When the load 18 comes into contact with the ground, the cable 17 connecting it with the lever 16 weakens. and the latter releases valve 6. Through the open valve 6, water enters the piston's over-piston cavity 2 and sweeps the piston 9 into the lower position. When this occurs, the annular grooves 11 of the piston 9 are aligned with the holes 7 in the striker 2 and the ball retainers 8 located therein are squeezed out by water pressure from the annular grooves 12 of the housing 1 into the annular grooves 11 of the piston 9, disengaging the housing 1 and the firing pin 2. Hydrostatic water pressure acceleration The head is 2, an ac him and a column pipe 3. The shears 14, which turn to the horizontal position, prevent upward movement of the body 1 upwards. By striking the striker 2 on the shaft 4, it is knocked out of the housing 1, the column pipe 3 is inserted into the bottom soil.

With the soil sample taken, the sampler with cable 25 rises onto the watercraft.

Claims (2)

Invention Formula Hydrodynamic sampler of bottom soil containing hollow 20 cylindrical body, mounted in the upper part of the body, a hollow firing pin with a piston, clamps and a valve connecting its over piston cavity with the environment, and located at the bottom of the core body  tube and anvil, while the anvil is connected to the body with a cable, characterized in that, in order to increase the efficiency of the operation when sampling a large volume, a central hole is made in the anvil, and the striker is equipped with a rod passed through the hole in the anvil and connecting it with core tube. 35 Sources of Information taken into account in the examination l.Marifie Technol. I. 19b9, 3, No. 3 p. 53-60. 2. USSR author's certificate 40 No. 700806, cl. G 01 N 1/20, 10.11.76.