DEVICE FOR TAKING BOTTOM SOIL SAMPLES FROM DEEP WATER BASINS

摘要

The invention relates to a device for taking bottom soil samples from a deep water basin. The device includes, a frame, a leader rod accommodated in the frame and provided with a float at the top, a sampling element located at the lower part of the leader rod and made in the form of a grab with normally open jaws, and ballast weights removably suspended from the frame and weighing enough to lower the device in the water of the basin until the lower end of the leader rod strikes the bottom of the basin. The grab jaws are closable, and the ballast weights are removed from the frame when the leader rod strikes the bottom of the basin by a mechanical lock joint which connects the weights with the leader rod so that when the leader rod strikes the bottom the lock jointsshifts the weight to an unstable state and they are removed from the frame. Containers are articulated at lower points on the jaws of the grab in a state of labile equilibrium and are filled with the ballast weights of a preset mass, and a system of levers having one end connected with the leader rod and the other end bearing against the containers for holding them in an initial position and for releasing them at the moment when the leader rod strikes an obstacle. The leader rod is movable in an axial direction.