Sampling device for water quality monitoring

Abstract

A sampling device for water quality monitoring comprises a telescopic cylinder, the telescopic cylinder is sleeved with a winding device, and the winding device is connected with a connecting line and a sampling barrel; the sampling barrel comprises an uppermost threaded cover, a barrel part and a cone part, and a communicating valve communicated with the interior of the sampling barrel is arranged on the threaded cover; and a filter mechanism is arranged at the bottom of the cone part and comprises a filter pipe communicated with the cone part, a second filter screen is arranged above the filter pipe, a limiting device is arranged below the second filter screen, and a floating ball is arranged in the limiting device. According to the device, a water sample of a water layer with a specified depth can be collected, and a sediment sample in the water sample of the water layer with the specified depth can be collected, so that the functionality of the device is improved; and the problem that the sampling barrel moves along with water flow due to the impact of the water flow to the sampling device in the flowing water flow sampling process, and the sampling barrel cannot be accurately controlled to reach the depth of a water layer with a specified depth so as to collect a corresponding water sample is solved.

Description

technical field [0001] The invention belongs to the technical field of water quality monitoring, in particular to a sampling device for water quality monitoring. Background technique [0002] Water quality monitoring is the process of monitoring and measuring the types of pollutants in the water body, the concentration of various pollutants and the trend of change, and evaluating the water quality status. The monitoring scope is very wide, including unpolluted and polluted natural water (rivers, rivers, Lake, sea and groundwater) and various industrial drainage, etc.; the main monitoring items can be divided into two categories: one is a comprehensive indicator reflecting the water quality, such as temperature, color, turbidity, pH value, conductivity , suspended solids, dissolved oxygen, chemical oxygen demand and biochemical oxygen demand, etc.; the other category is some toxic substances, such as phenol, cyanide, arsenic, lead, chromium, cadmium, mercury and organic pesti...

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of the economy and the rapid increase in the degree of industrialization, a large amount of harmful substances are produced and discharged outdoors. Among them, the water pollution is the most serious, which greatly affects people's life and health. In order to effectively control sewage treatment and detection and prevention, relevant Personnel began to carry out large-scale sewage monitoring and treatment. The primary task of sewage monitoring and treatment is water sampling. When the existing water sampling equipment takes water samples at a specified depth in the flowing water flow, on the one hand, due to the impact of the water flow on the sampling device Impact, so that the sampling device moves with the water flow, it is inconvenient to accurately control the sampling settings to reach the depth of the water layer at the specified depth; secondly, because many existing sampling facilities are non-closed, it is impossible to take the water layer at the specified depth after entering the water. However, for some sampling devices that can take specified depth water layers, their structure is simple and their functions are few, and it is impossible to sample and analyze the sediment in the specified depth water layer during the process of taking water samples. Add additional devices, increase the workload and cost of sampling personnel

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