RU93534U1 - BOTTOM SOIL Sampler - Google Patents

Abstract

 A bottom soil sampler, including a core pipe fixed on a holder made of separate sections fastened together, the lower part of which is equipped with a device for holding the soil when lifting the sampler, characterized in that the sampler is additionally equipped with a deepening mechanism in the form of a vibrator mounted on a stand mounted on the holder, and the individual sections of the holder are made in the form of tubes and are fastened to each other by means of threaded connections, and the device for holding I primer is designed as a petal tip and the resilient valve, furthermore, core barrel is formed of separate sections, interconnected by means of couplings.

Description

The utility model is intended for sampling soil from the bottom of shallow water areas, for example, rivers, lakes, the coastal zone of the sea from small boats, not equipped with winches, for subsequent physical, mechanical, chemical and other analyzes, the results of which are used in studies in the field of geology, geoecology and other areas.

A universal sampler of bottom sediments and drill cuttings is known (RF patent No. 73396, IPC ЕВВ 49/02, published on 05/20/2008), which is a hollow cylinder to which a collapsible type handle is attached, consisting of separate sections fastened together through holes in the end sections with bolts. The end of the cylinder is made beveled and pointed. The cylinder is equipped with articulated plates. One plate is fixed in the upper part of the cylinder and, when the sampler is raised under the influence of water pressure, closes its end face from above, and the second plate fixed in the lower part of the cylinder on its inner side rests on the stop and closes the cylinder from the bottom under the action of gravity of the selected deposits.

The disadvantages of the sampler described above include the need for great physical effort when introducing a cylindrical pipe into the deposits to be taken, especially if the deposits are dense, therefore, the sampler is suitable for collecting core samples of small lengths not exceeding 1-1.5 m and does not allow sampling with a larger depths. In addition, in the lower part of the cylinder, part of the sample taken falls out until the lower plate is tilted and the lower end of the cylinder is closed. Assembling the handle using bolts to connect the individual sections of the handle is a laborious operation and is time consuming.

The utility model solves the problem of facilitating the collection of core soil samples from a greater depth by using the deepening mechanism and creating conditions for better preservation of the selected sample during sampling, as well as reducing the complexity and time for assembling and disassembling the sampler by using threaded connections.

To obtain the necessary technical effect in a known bottom soil sampler, including a core pipe fixed on a holder made of separate sections fastened together, the lower part of which is equipped with a device for holding the soil when lifting the sampler, it is proposed to additionally provide the sampler with a deepening mechanism in the form of a vibrator mounted on stand mounted on the holder, and separate sections of the holder to perform in the form of tubes that are attached to each other by power of threaded connections, and the device for holding the soil is made in the form of a tip with a flap spring valve. The core pipe is proposed to be made of separate sections, interconnected by means of couplings.

The diagram attached to the description shows the proposed bottom soil sampler in operation. The following notation is used in the diagram:

1 - core pipe; 2 - tip with flap spring valve; 3 - holder; 4 - eye with a screw for connecting the holder to the core pipe; 5 - electromechanical vibrator; 6 - stand for vibrator.

The proposed collapsible design of the sampler consists of a core pipe 1, a holder 3 and an electromechanical vibrator 5. The core pipe 1 is made of stainless steel. During the tests, the pipe diameter was 70 mm, its base length was 3 m. The length of each additional section of the core pipe was 1 m. The sections were connected using couplings. On the lower part of the pipe with the help of a threaded connection, a tip 2 with a flap spring valve is attached. The holder is made of separate sections, which are steel tubes with an external diameter of 25 mm, which are fastened using a threaded connection. A ring 4 is welded to the upper part of the core pipe 1, to which the holder 3 is attached with screws. A support 6 for an electromechanical vibrator 5 operating on a voltage of 220 V is mounted using a threaded connection.

The sampler works as follows.

The holder 3 is assembled from separate sections, the length of which should be 2-3 m more than the previously measured depth at the sampling location. The core tube is assembled, the tip 2 with a flap valve is screwed. After that, the core pipe 1 is connected to the holder 3. The assembled sampler is discharged overboard and held by the holder 3 by its hands is slowly lowered into the water. After the pipe reaches the bottom, it is pressed into the bottom soil by physical force. Then set the stand for the electromechanical vibrator and continue to deepen the core tube 1, visually monitoring the vertical position of the holder. As the core pipe is deepened, the length of the holder is increased by connecting new sections.

The sampler is lifted in the reverse order. The vibrator is removed, the holder sections are disconnected, and the core pipe with the selected sample of bottom soil rises on board the vessel and is laid on the deck. The tip with the flap valve is unscrewed, a piston is inserted into the pipe and the column of the selected sample is pushed out in a known hydraulic or mechanical way.

The proposed sampler was used by the laboratory staff of the coastal systems of the Atlantic branch of the Institute named after P.P. Shirshova of the Russian Academy of Sciences in expeditionary work on the study of bottom sediments of the Kaliningrad Gulf (Baltic Sea). As a result, high-quality columns of selected samples of bottom soil from 2 to 4 meters long were obtained. The lower part of the sample is well preserved due to the use of a flap valve, as it fires faster than the safety plate in the prototype sampler and the bottom of the sample does not fall out of the pipe. In addition, the ease of connecting / disconnecting sections when servicing the sampler allows two employees to perform all operations for sampling the bottom soil without any assistance. The time spent on assembling / disassembling the sampler is reduced by at least 20% compared with the prototype, and the column length of the selected soil is increased at least twice, and the proposed design of the sampler allows sampling from small boats not equipped with winches. The complexity of the operations is significantly reduced when using a vibrator.

Claims (1)

A bottom soil sampler, including a core pipe fixed on a holder made of separate sections fastened together, the lower part of which is equipped with a device for holding the soil when lifting the sampler, characterized in that the sampler is additionally equipped with a deepening mechanism in the form of a vibrator mounted on a stand mounted on the holder, and the individual sections of the holder are made in the form of tubes and are fastened to each other by means of threaded connections, and the device for holding I primer is designed as a petal tip and the resilient valve, furthermore, core barrel is formed of separate sections, interconnected by means of couplings.