SU691722A1 - Pneumatic soil sampler - Google Patents

Description

one

This invention relates to selection. columns of loose and loose bottom soils in shallow water from small vessels. The sampler can be used for various geological and engineering-geological work on the shelf.

The prototype is a device for sampling soil from the seabed, which includes a chamber with powder, charge, a ground receiving glass with a lock, a piston rod located in the glass, and a damper disk 1.

 However, since an electric actuator and electric ignitor are required for a powder charge chamber, the piston cap collapses when inserted, the device is complicated in design and its assembly presents great difficulties. In addition, the device cannot ensure reliable and smooth penetration into the ground, since the pilot load or earlier could touch the damper disk or not reach it at all, as well as a strong vibration occurs and a partial penetration into the ground occurs. but not to the full height of the ground-glass.

The aim of the invention is to increase the reliability of the sampler.

This goal is achieved by the fact that the sampler is equipped with a receiver, the rod is hollow, the piston has channels, and the lock is made in the form of a ball lock, the piston being rigidly fixed on the rod, and the glass

0 made with a shank and a seal placed between the lid and the shank.

The drawing shows a General view of the device.

five

The sampler consists of a chamber 1, crumbs 2 and 3, a damping disk 4, ground-receiving. cup 5, piston 6, hollow rod 7 and receiver 8. Glass 5 is fixed relative to the camera

0 1 lock, made in the form of a ball lock, including balls 9, pressed into the ring groove. the ground plane is a cylindrical part of the contact heel 10. The shank 11 of the station5 canal 5 is sealed in the lid 2 by the cuff 12 to reduce the initial active area of the cup 5 and, accordingly, the load on the ball lock. At the exit from the cylinder, the grouser is sealed

0

a cuff 13. The lower open end of the grounding core is provided with a core gauge 14 and a tip 15, the piston y has channels 16 connecting the cavity of the cup 5 with the stem hole 7, the stem 7 is sealed in the lid 2 with a rubber ring 17 and secured with a nut 18. On the rod 7 at the piston 6 A rubber damper 19 is mounted. A receiver 8 is fixed on the lid 2, which communicates through the holes in the rod 7 and the piston 6 with the cup cavity 5. For supply and discharge and start-up of compressed air serves valve 20 on chamber 1 and valve 21 on the receiver. The receiver is equipped with a clamp for lowering and lifting the sampler.

The sampler works as follows.

The assembled sampler is charged with compressed air through a hose connected to the valve 20. For safety, the charging is performed in the submerged position. Then the sampler is lowered to the bottom along with the hose. The latter is previously muffled, disconnected from the charging device and secured to the trip cable.

When the sampler is seated on the bottom of the contact pitch 10, it moves upward, the balls 9 are displaced along the conical section of the pt 10, the exit from the groove on the glass 5 and the vacated glass 5 begins to penetrate the ground. After the release of the shank 11 from the crushing valve 2, the air pressure acts on the entire active area of the ground receiver glass 5 and the latter is fired into the ground at high speed. The rollback, chambers 1 and the rise of the associated piston 6 is limited by hydrodynamic braking of the disk 4 air. The ground outflow is displaced through channels 16 in the piston 6 and the hollow rod 7 into the receiver 8. The final pressure in the receiver is determined by the ratio of the volumes of the receiver 8 and the cup 5 that ensures greater independence of the embedding force from the depth of the sea.

The tip 15 of the soil toner cuts the soil column, while the compaction of the soil is reduced by the action of the area of reduced pressure formed under the piston 6. It is possible to stretch. The core is limited by keeping the piston at the bottom by braking the disk 4.

The core is held in the soil by the core 14 and the piston 6. After being removed from the soil, the sampler rises to the surface and the pressure in the receiver 8 and chamber 1 is released by the valves 21 and 20.

The core is removed by supplying compressed air to the receiver 8, while the groundwater is pulled into the chamber 1 and the piston 6 pushes the core into the substituted tray.

Claims (3)

1. Pneumatic soil sampler, including a chamber of compressed gas with a lid, a ground receiving glass with a latch installed in it, , a rod and a piston located in a glass and a damper disk are detachable and so that, in order to increase reliability, it is equipped with a receiver, the rod is hollow, the piston has channels, and the lock is made in the form of a ball lock. 2. The sampler according to claim 1, about the fact that the piston rigidly fixed on the stock. 3. Sampler for PP. 1 and 2, characterized in that the glass is made with a shank and a seal located between the lid and the shank. Sources of information taken into account in the examination. 1. USSR author's certificate No. 508578, M., Cl, GOl N 1/02, 1974 (prototype), 21