SU1051220A1 - Apparatus for taking soil samples under water - Google Patents

Abstract

A device for sampling a soil under water, including a column tube and a sealed working chamber with an inlet in the upper part, blocked by a closure element, characterized in that, in order to improve the quality of the sample being taken by providing repeated hydrodynamic impacts on the core pipe, it is equipped with a spring-loaded piston valve with a lock of its lower position and a drain tank connected by a connecting channel with a working chamber, the closure element being designed as curtains located in g rmetichnyh cavities filled with a liquid oil, the piston-valve is installed at the bottom of the working chamber, with the overlap in the upper position of the connecting hole and the cavity under norshnemI gidromagistralyu valve connected with the cavities in which are arranged shutters. (L

Description

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The invention relates to mining and can be used for sampling data of sedimentary rocks.

A sea sampler is known, consisting of a core tube, an airtight working chamber with electrodes, a condenser, a ballast weight and embedded in the ground under the action of water hammer that occurs in the working chamber when an electrical discharge of high power I is passed through the electrodes.

The disadvantages of this sampler are its structural complexity and the danger of electric shock.

A well-known underwater column sample otbor, containing a column pipe with double walls, between which is formed an airtight working chamber with an inlet opening in the upper part, closed by a shut-off element in the form of roofs Kii from instant material and a layer of low-melting substance 2.

However, due to the single use of a hydrodynamic impact, the process of introducing a known sampler into the ground is not manageable, as a result of which the quality of testing is reduced.

The purpose of the invention is to improve the quality of the sample taken by providing repeated hydrodynamic impacts on the core tube.

The goal is achieved by the fact that a device for sampling soil, including a column pipe and a sealed working chamber with an inlet opening of the upper part, blocked by a locking element, is provided with a spring-loaded piston-valve with a lock of its lower position and drain capacity connected by a connecting channel to the working chamber The locking element is designed in the form of shutters located in tight cavities filled with liquid oil. The piston-valve is installed in the lower part of the working chamber with the possibility of Covered the top position of the connecting hole and the cavity under the piston-valve connected gidromagistralyu with cavities in which are arranged shutters.

The drawing shows the proposed device, a General view.

The device has a column tube I with a collar 2, a drain tank 3 connected via channel / 4 to the cavity of the working chamber 5. In the lower part of the working chamber there is a piston-valve-6 with a spring 7, fixed in the lower extreme position by electrocores 8 Also, electrical contacts 9, which are supplied as well as electric resistors, through a relay 10. Pipelines 11 connect the space under the valve filled with technical oil to the cavities of the shutters 12. To lift the device, use a cable 13 connected to a cable loop 14 ..

The device works as follows.

when the sampler at the bottom is lowered onto the cable-cable 13, the sleep verticality is ensured by the positive buoyancy of the tank 3. After the bottom is reached, an electrical signal is given to the relay 10

0 and the electro-supports 8, which, having retracted their spring-loaded cores, release the piston-valve 6, which begins to move-f upward under the action of the compressed spring 7 and causes the curtains 12 to open up by suction of technical oil. As a result. depressurization of the worker; chamber 5, a gyroarodynamic impact takes place on its bottom, under the influence of the hydrodynamic impact of the column tube I is inserted into the ground, and the piston-valve b,

0 moving down, the shutters 12 are closed. At the same time, drain holes 4 are opened, through which the water filling the working chamber flows into the tank 3. When the water level drops below the electrical contacts 9, they open, the relay 10 is activated and sends a signal to the electrostatic switches 8 which re-release the piston-valve 6, and the duty cycle repeats.

The proposed device allows to produce multiple hydrodynamic impacts on the core tube until the drain tank 3 is filled with water. The proposed device allows the hydrodynamic strikes to repeatedly create hydrodynamic impacts on the core tube during one voyage of the marine sampler drills.

Claims (1)

DEVICE FOR SAMPLING UNDERGROUND UNDER WATER, including a core pipe and a sealed working chamber with an inlet in the upper part, blocked by a locking element, characterized in that, in order to improve the quality of the sample taken by providing multiple hydrodynamic shock to the core pipe, it is equipped with a spring-loaded piston -valve with a lock of its lower position and a drain tank connected by a connecting channel to the working chamber, and the locking element is made in the form of shutters located in the seal GOVERNMENTAL cavities filled with a liquid oil, the piston-valve is installed at the bottom of the processing chamber to overlap the upper position of the connecting hole and the cavity under porshnemklapanom gidromagistralyu connected with cavities in which are arranged shutters. 5S ω s