SU700806A1 - Hydrodynamic sampler - Google Patents

Description

one

The invention relates to marine exploration techniques and is intended for sampling at great depths of samples of bottom rocks of various densities, including rock.

A hydrodynamic sampler is known, comprising a cylindrical body, a core tube, and a hydraulic vibrator operating at a pressure differential between the surrounding hydrostatic and atmospheric inside the body.

The disadvantage of this sampler is the impossibility of sampling rocky rocks.

The closest solution to the invention is a hydrodynamic sampler, comprising a cylindrical body with a plug in the upper part, movable relative to the body of the anvil with cables and with a core pipe installed on it, a lever and a weight. The cap is made in the form of a steel disk that covers the end of the body and is supplied with an explosive charge. After the disk is destroyed by an explosion, the water entering the case is accelerated by hydrostatic pressure. The kinetic energy of a fast moving water column is used to introduce a core pipe into rocky soil.

The disadvantage of such a sampler is the selection of only rock and the danger of exploitation.

The aim of the invention is to test rocks of various densities, including rock, and to ensure the safe operation of the sampler.

This goal is achieved by the fact that the plug is made in the form of a hollow die fitted movably in the housing and fitted with latches with a piston installed inside it and a valve placed in the upper part of the striker.

In addition, the striker is equipped with a collet tip mounted on its lower end.

The drawing shows the proposed hydrodynamic sampler, the common VIL-hydrodynamic sampler contains a cylindrical body 1 and anvil 3 connected with it by cables 2 with mounted core pipe 4 and a valve 5 designed to pump air out of the body. Holes 6 and 7 are made in the anvil for exhausting water from the core pipe. In the upper part of the body, a hollow firing pin 8 is movably mounted with a porcelain 9 installed inside it, interacting with latches 10 protruding from the striker into the annular groove 11 of the housing. The piston has an annular groove 12 and is spring-loaded by a spring 13. In the upper part of the striker, a valve 14 is installed, communicating through the openings 15 and 16 to the piston cavity of the striker with the environment. A spring 17, placed between the plug 18 and the valve 14, is pressed against the lever 19 attached to the inlet funnel 20 and connected by a cable 21 with a load 22. A collet tip 23 is mounted on the bottom end of the striker, and a hole in the anvil is made under it 24 The casing is sealed with sealing rings 25 and 26, and to reduce braking in water it is provided with a conical fairing 27.

Hydrodynamic sampler works as follows.

Using a geolocator, a bottom section is examined where a sampling is scheduled, and a core pipe is connected that corresponds to the density of rocks lying on the bottom surface. After that, the air from the housing 1 is pumped out through the valve 5. Vacuuming the housing eliminates the air blower, softening the blow of the striker 8 over the anvil 3, and check the tightness of the housing. In addition, the vacuum in the cavity of the housing contributes to the retention of the anvil 3 by atmospheric pressure, which compensates for the weight of the anvil and the tube 4 installed on it.

Held - with a cable in a vertical position, the sampler is lowered to the bottom. After the load 22 is in contact with the ground, the cable 21 is loosened and the spring 17, turning the lever 19, moves the valve 14 to its lowest position. The surrounding water, penetrating through the openings 15 and 16 into the fisturized cavity of the striker 8, displaces the piston 9 downwards.

Under the action of hydrostatic pressure on the upper end of the striker, the latches 10 are squeezed out of the annular groove 11 into the annular groove 12. The striker 8 is released and the pressure of the water flowing through the funnel 20 accelerates along the housing 1. During the acceleration of the striker the hydrostatic pressure applied from below to the anvil 3, is no longer balanced by the same pressure from above on the firing pin 8. The sampler is thrown upwards by an unbalanced hydrostatic pressure, and the vertical rebound value reduces the water resistance s.

The impact of the striker and the accelerated mass of water knocks the anvil 3 out of the body and inserts the core pipe 4 into the ground. When the water is seen, water from the pipe is displaced by the soil out through holes 6 and 7.

After the impact, the striker 8 is fixed on the anvil. Not 3 with a collet collet 23.

The main advantages of the invention are the rejection of the use in the construction of an explosive and the use of the movement installed in the body of the striker with a hydraulic power device to unlock it. Due to this, it is possible to test rocks of various densities, including rock, and to ensure safe operation of the sampler.

Claims (2)

1. Hydrodynamic sampler containing cylindrical body with a plug in the upper part, movable relative to the housing of the anvil with cables and with a core pipe installed on it, a lever and a load, characterized in that, in order to test rocks of various density, including rock, and to ensure safe operation of the sampler, the plug is made in the form of a movably mounted case and fitted with latches hollow striker with a piston installed inside it and a valve placed in the upper part of the striker. 2. The sampler according to claim 1, wherein the striker is equipped with a collet tip mounted on its bottom end.