Pneumatic deepwater bottom mud sampling device

Abstract

The invention relates to a pneumatic deepwater bottom mud sampling device. A shell is an oval cylinder which has a large middle and small two ends and consists of a drum and two barrels, the two barrels are respectively connected to two ends of the drum, and each barrel has one big end and one small end; a bottom plate is fixed at the lower end of the shell, a hole is formed in the middle of the bottom plate and is used as a sampling opening, a sphere floats in the shell and is in contact with the sampling opening, the radian of the sampling opening is the same as that of the sphere, an uppercover plate is fixed at the upper end of the shell, an air feeding and discharging tube is fixed on the upper cover plate, is connected with an air compressor and is used for feeding high-pressure airto the shell and discharging the high-pressure air from the shell; a hanging bracket is welded to the top of the upper cover plate and is connected with a winch on an operation boat through a mooringrope; a cross rod is welded to the inside of the shell; the lifting height of the sphere is controlled; and three balancing plates which form angles of 120 degrees mutually are fixed on the outside of the lower end of the shell, so that the sampling device is always in a vertical state in a suspension process during working. The pneumatic deepwater bottom mud sampling device has the advantages that the structure is simple, positioning and depth fixing are accurate, sampling button mud is not disturbed, one-time sampling is implemented, detection is accurate, and working efficiency is high.

Description

technical field [0001] The invention relates to a pneumatic deep-water sediment sampling device, in particular to an air-pressure deep-water sediment sampling device which does not disturb the sampling sediment, has large sampling volume at one time, high benefit and accurate positioning and depth determination. Background technique [0002] As we all know, at present, there are mainly two types of sediment samplers used in lake and reservoir ecological dredging projects and dredging restoration projects: the grab type and the column type, both of which are difficult to collect fluid floating mud, and the grab type The grab-and-column-type seals are both mechanically operated, so the mud in the peristaltic state is disturbed. In addition, whether it is a grab-and-hold sampler or a column-type sampler, the sampling volume at a time is usually less than 2kg, which cannot meet the needs of large sample testing > 20kg, and multiple sampling, not the same sample, resulting in ...

AI Technical Summary

Problems solved by technology

[0002] As we all know, at present, there are mainly two types of sediment samplers used in lake and reservoir ecological dredging projects and dredging restoration projects: the grab type and the column type, both of which are difficult to collect fluid floating mud, and the grab type The grab-and-column-type seals are mechanically operated, so the mud in the peristaltic state is disturbed. In addition, whether it is a grab-and-hub sampler or a column-type sampler, the sampling volume at one time is usually less than 2kg, unable to meet the needs of large sample testing > 20kg, and multiple sampling, not the same sample, resulting in large errors in sample testing

Images