A water sample collection device for an online heavy metal analyzer in water

Abstract

The invention discloses a water sample collector for a heavy metal online analyzer in drinking water. The water sampler collector is characterized by being cascaded by a three-way joint according to the number of water sample sampling paths; an input end of a second three-way joint is connected with an output end of a first three-way joint; a plurality of three-way joints are introduced by the analogy to achieve expansion of selecting a plurality of water samples; and an exhaust pipe arranged on a sealing cover of a water sample temporary storage tank is used for communicating pressure of gas of the outside and pressure of gas in the tank, so that air pressure inside and outside the tank is balanced, and the liquid in the tank is prevented from refluxing and flowing out of a sampling tube. Water samples before and after online analysis treatment of heavy metal in water are subjected to online collection by adopting the device disclosed by the invention; automatically sequential sampling, overflow recovery and automatic evacuation of a plurality of water samples are achieved; the complete water sample collecting process is automatically finished; a human operation error is avoided; and the instantaneity and the accuracy of water sample collection are improved. The collector is simple in structure, low in cost, convenient to install, and convenient in collecting water samples.

Description

technical field [0001] The invention belongs to the technical field of water sample collection, in particular to a multi-source water sample collection device used for an online heavy metal analyzer in drinking water. Background technique [0002] At present, research on water body research and monitoring of water quality changes usually requires a water sample collection device to complete the collection, testing and analysis of water samples. Water sample collection is the first step in the process of water body research and water quality monitoring. It is very important to make the water sample collection device automatic, simple and practical. [0003] For example, in the water sample collection system proposed by Chinese Patent Application Publication No. CN 1303007A, since there are many components used, and the combination between them is not too tight, the sampling accuracy will often be affected by the deformation or damage of one component. Descent or water sample...

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Problems solved by technology

[0003] For example, in the water sample collection system proposed by Chinese Patent Application Publication No. CN 1303007A, since there are many components used, and the combination between them is not too tight, the sampling accuracy will often be affected by the deformation or damage of one component. Descent or water sampler cannot be used

In addition, due to the combined use of the water pump and the water delivery pipe adopted by the water sample collection system, only a single water sample can be drawn into the water storage tank at a time, and multiple cycle collection of multiple water samples cannot be completed at the same time, and the degree of automation is low. Not conducive to wide-scale promotion and use

[0004] Existing water sample collection devices generally can only collect a single water sample and have a single function. The sampling equipment is often limited by the distance and height of the sampling water source, and cannot realize the automatic extraction of water samples and the sequential collection of water samples from multiple water sources; at the same time After each water sample collection is completed, the controller closes all circuits, the pump stops pumping water, the collector stops working, and the collection of a single water sample is completed. When sampling again, the pump must be restarted to repeat the above operations

However, in actual water sample collection work, it is often necessary to collect water samples from multiple water sources such as before water sample treatment and after water sample treatment. Therefore, the existing water sample collection device often needs to disassemble the equipment, which is not conducive to equipment maintenance.

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