Gravity piston type water sampler

Abstract

The invention belongs to the technical field of water sampling equipment, particularly relates to a gravity piston type water sampler. The gravity piston type water sampler comprises a cylinder barrel in the middle, an upper frame positioned at the top of the cylinder barrel, and a lower frame positioned at the bottom of the cylinder barrel, wherein a piston is arranged in the cylinder barrel; a water outlet with a valve is arranged at the bottom of the outer wall of the cylinder barrel; a water inlet is formed in the top wall of the cylinder barrel; a pull rod provided with the bottom end connected to the top of the piston, is inserted in the water inlet; a lock is arranged at the top of the pull rod; the upper end and the lower end of the water inlet are both frustum-shaped openings; conical sealing tables are arranged at the lower end of the lock and the connected part between the pull rod and the piston; the two conical sealing tables are respectively fitted with the opening on the upper side and the opening on the lower side; a releasing mechanism for clamping the lock and loosing the lock under the hammer applying effect is additionally arranged at the top of the upper frame. The water sampler provided by the invention is simple in structure, and convenient and fast to operate, and can ensure that a water sample is free from cross contamination.

Description

technical field [0001] The invention belongs to the technical field of water collection equipment, in particular to a gravity piston water collection device. Background technique [0002] In the sampling process of marine chemistry, etc., water collectors are usually used when it comes to the collection of water samples in various layers below the sea surface. The water collection device generally includes a water collection cylinder and a water collection switch connected to the water collection cylinder to control actions at different depths. According to different designs, the form of triggering the switch action of the water collection device can be triggered by a hammer, a pressure switch element or Cable control trigger and other forms. The action principle is generally as follows: the water collector is lowered to a predetermined depth, and the trigger device is activated to close the water collector that has completed water collection. The water collectors in the p...

AI Technical Summary

Problems solved by technology

The water collectors in the prior art are generally complex in structure and cumbersome to operate, and the sealing performance of the water collection cylinder after the water collection is completed is difficult to guarantee, resulting in insufficient isolation of the water sample from the external water body during the ascent of the water collector.

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