Piston self-closed sampler of biogas digester

Abstract

The invention discloses a piston self-closed sampler of a biogas digester. The piston self-closed sampler of the biogas digester comprises a piston sampling tube and a sampling tube rope. The sampling tube rope is connected with the piston sampling tube. The piston sampling tube comprises a sampling cabin, a sampling port, a piston and a piston rod. The piston rod is connected with the piston. The piston is positioned in the sampling cabin. The sampling cabin is connected with the sampling port. The sampling port is provided with a self-closed cover. The self-closed cover comprises a liquid inlet and a liquid outlet. The liquid outlet is provided with a rotatable inwards-turned sealing plate. The sealing plate is positioned at the sampling cabin. The liquid inlet is provided with a rotatable outwards-turned turning cover. The turning cover is connected with a pull rope. The turning cover can be outwards-turned by pulling the pull rope, so that the liquid inlet is opened. The pulling rope is loosened, so the liquid inlet is closed by the turning cover under the own gravity. The piston self-closed sampler of the biogas digester has the characteristics of simple implementation and convenient operation, is capable of accurately receiving the sample liquid of the assigned depth, and closing automatically, and is good for reducing the loss or pollution of the sample, and improving the sample quality.

Description

Technical field [0001] The invention relates to the field of agricultural article detection tools, in particular to a biogas digester piston self-closing sampler. Background technique [0002] In hydrogeology, it is often necessary to detect the composition of groundwater, such as iron, fluorine, zinc, copper, chromium, manganese, iodine, molybdenum, cobalt and other elements in the water. These elements are necessary for the human body and are very important for the normal metabolism of life. Many endemic diseases are caused by people who drink water that does not meet the standard for a long time. For example, high-fluorine water causes dental fluorosis, low-iodine water causes large neck disease, and high-arsenic water causes skin cancer. At present, the groundwater collection method is to use a wide-mouth bottle to collect the liquid directly from the port or the liquid pool. Since the liquid composition at different depths may be different in the same liquid pool, it is nece...

AI Technical Summary

Problems solved by technology

At present, the groundwater collection method is to use a wide-mouth bottle to collect directly in the port where the liquid flows out or in the liquid pool. Since the liquid composition at different depths may be different in the same liquid pool, it is necessary to use wide-mouth bottles to collect different depths in stages. The liquids at different depths are numbered for distinction, and finally the numbered liquids are tested separately to obtain the composition of the liquids at different depths. The collection process of this groundwater collection method is very complicated and the collection efficiency is low.

[0003] Ordinary liquid sample sampling tools are not suitable for sealed sampling of samples with special odor or poisonous, waterproof and anti-pollution. The old sampling method is generally a rotating open sampling tube warehouse, which has poor sealing effect and is easy to cross. Pollution, inconvenient to carry, limited on-site use, etc. Digester smell is unpleasant and may be fatal if inhaled for a long time

In summary, the above situation brings great difficulties to the analysis work. On the one hand, it causes sample cross-contamination and poor sealing effect; on the other hand, it is not easy to carry and fix, and there are safety issues

[0004] By searching the patent database, such as: anti-pollution liquid sampler CN2888436Y, closed liquid gas sampler CN2786600Y, a new type of liquid sample sealed sampling box CN205580783U, a liquid sampler CN205449566U, a liquid pressure maintaining sampling cylinder CN104792578A, liquid separation Layer sampling sealing device CN204964252U, a closed liquid sampler CN201852720U, negative pressure liquid sampler CN201837544U and other patents, it is found that the structure of the existing sampler is relatively complicated, and it is not easy to carry, and it is difficult to extract accurately when using Samples specified in different locations, and the extracted samples are easy to be lost or polluted, and the quality cannot be guaranteed

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