Novel closed quantitative sampling valve

Abstract

The invention discloses a novel closed quantitative sampling valve. The novel closed quantitative sampling valve comprises a valve main body, a sampling connector and a valve body inner core, whereinthe valve main body is provided with a valve body cavity; the sampling connector is used for connecting a sampling bottle; the valve body inner core is arranged in the valve body cavity and comprisesa first cavity, a second cavity and a sampling valve rod, the first cavity is a horizontal through hole that communicates with a first connection port and a second connection port; the second cavity is a through hole that is through up and down and communicates with the first cavity, wherein a sampling hole is formed in the bottom of the second cavity, and the first cavity communicates with the sampling bottle through the sampling hole; and the sampling valve rod is movably arranged in the second cavity. The novel closed quantitative sampling valve has the advantages of being compact in structure, quantitative in sampling, convenient to operate, attractive in appearance, and capable of achieving online sampling, ensuring timeliness and accuracy of sampling, avoiding the risk that staff arein direct contact with materials, and avoiding the risk of environmental pollution caused by sampling.

Description

technical field [0001] The invention relates to a sampling device for laboratory analysis in the fine chemical industry, in particular to a novel airtight quantitative sampling valve for sampling and analysis in an on-line production state. Background technique [0002] At present, in petrochemical, coal chemical, pharmaceutical and other fine chemical production, in order to ensure the safe and stable operation of the device and the quality of the products produced, corresponding process control methods will be established in important sections, and the quality analysis of intermediate products will be used. To determine whether the quality of the obtained product is qualified, whether the chemical plant is running smoothly, and adjust the operation plan in time according to the analysis results and needs. Its main process control method is to take out the continuous flow medium in the process pipeline for various analyzes to obtain the analysis results of the components. ...

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Problems solved by technology

[0003] At present, many chemical companies still adopt open sampling methods, such as welding a branch pipe and installing a valve on the pipeline where the material flows. When sampling, in order to ensure the representativeness and accuracy of the material, first open the valve and blind the branch pipe. Part of the material at the end is discharged, which is usually discharged into the ditch. When the discharged material is sufficient, it can be collected with a sampling bottle. In this way, the sample obtained is the continuous material being produced, which is representative and can represent the true quality of the product. , Different sampling operators have different sampling methods, and there are certain deviations in the quality of the products taken out. Open sampling like this will cause sample pollution and deviations in accuracy, and will also cause the health of the sampling personnel Hazards and Environmental Contamination Issues

[0004] In recent years, with the country's increasing requirements for safety and environmental protection, open sampling methods will gradually be eliminated, and airtight samplers are becoming more and more popular in chemical companies. There are many online airtight samplers on the market, but most of them are airtight The sampler is expensive, the price ranges from tens of thousands or even hundreds of thousands, and the operation is complicated. It is difficult to repair the sampler after it leaks, which increases the operating cost and maintenance work intensity

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