Surface water sampling device and method for water quality detection

Abstract

The invention discloses a surface water sampling device and method for water quality detection, the surface water sampling device for water quality detection comprises an inner cylinder, the bottom of the inner cylinder is fixedly connected with a bottom plate, the bottom plate is provided with an openable water outlet hole, the lower part of the bottom plate is fixedly connected with a balancing weight, the inner cylinder is slidably sleeved with an outer cylinder, and the top of the outer cylinder is fixedly connected with a top plate; the top plate is provided with a vent hole and connected with a pull rope; the upper end of the outer cylinder is connected with the floating plate; an outer water inlet hole is formed in the side wall of the middle section of the outer cylinder; an inner water inlet hole is formed in the side wall of the upper section of the inner cylinder; a slide way is formed in the outer wall of the inner cylinder; a transverse rod is fixedly arranged on the inner wall of the outer cylinder and located in the sliding way, and a spring limiting head is arranged on the side wall of the middle section of the sliding way; a lever is hinged below the outer cylinder; the outer wall is vertically and slidably connected with a transmission rod, the bottom end of the transmission rod abuts against a lever resisting arm, the lever resisting arm is located below the inner cylinder, and the top end of the transmission rod is bent and then penetrates through the vent hole downwards to be connected with a sealing plug. The device is reasonable and simple in structure, and can realize the effects of automatic sampling, quantitative sampling, automatic sealing and pollution prevention of surface water.

Description

technical field [0001] The invention belongs to the technical field of water body sampling, and in particular relates to a surface water sampling device and method for water quality detection. Background technique [0002] In order to grasp the water quality of the river water, the staff need to test the river water frequently. Before the river water is tested, the river water needs to be sampled. When sampling the surface water, the current method is to manually use cups and other containers to measure the river water. Carry out scooping and sampling, but manual sampling of river water with cups can only extract water near the river bank, but cannot sample water far from the shore. In order to sample distant water, the container needs to be thrown far away In this way, the water close to the river bank will be mixed with the water when it is recovered, which will affect the test results, and the sampling volume is not easy to control. Contents of the invention [0003] I...

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Problems solved by technology

[0002] In order to grasp the water quality of the river water, the staff need to test the river water frequently. Before the river water is tested, the river water needs to be sampled. When sampling the surface water, the river water is generally manually used in containers such as cups. Carry out scooping and sampling, but manual sampling of river water with cups can only extract water near the river bank, but cannot sample water far from the shore. In order to sample distant water, the container needs to be thrown far away. It will be taken back again, so that the water near the river bank will be mixed with the water when it is taken back, which will affect the test results, and the sampling volume is not easy to control

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