A kind of anti-inner layer adhesion dual-opening sampling valve in the field of chemical industry

Abstract

The invention discloses a dual-open sampling valve capable of preventing inner layer adhesion in the chemical field, and belongs to the field of sampling valves. According to the dual-open sampling valve capable of preventing inner layer adhesion in the chemical field, the inner walls of an inlet valve cavity (a), an outlet valve cavity (b) and a sampling channel are all coated with super adhesion-preventing coatings, and a corrosive fluid medium can slide down from the super adhesion-preventing coatings extremely easily, so that the contact areas between the corrosive fluid medium and the coatings are reduced; the accumulation of the corrosive fluid medium on the surfaces of the coatings is reduced, so that the permeation of the corrosive fluid medium into the coatings is reduced, and a corrosion restraining effect is achieved; and in addition, a stamping scraping mechanism is arranged at the sampling channel, the fluid medium can continue to be injected every time sampling is completed, and the fluid medium impacts an internal stamping disc to enable a flexible swing ring with a hard cutting edge to scrape a small quantity of medium adhering to a pipe wall, so that the medium purity during next sampling is improved, and the sample testing errors caused by the impurity of samples are minimized.

Description

technical field [0001] The invention relates to the field of sampling valves, more specifically, to a double-opening sampling valve for preventing inner layer adhesion in the chemical industry. Background technique [0002] Sampling valve refers to the valve used to obtain medium samples in pipelines or equipment. In many occasions where chemical analysis of medium samples is often required, special sampling valves are often used for sampling. According to different working principles or performances during sampling, sampling valves are mainly divided into three types, including double opening valves, flange clip valves and sampling valves with insulation jackets. [0003] The double opening valve is the most common sampling valve, and it is also a kind of aseptic sampling valve. As the name implies, the aseptic sampling valve is to ensure the sterility of the sampling environment. The double opening valve is usually composed of two connected ball valves, hence the name dou...

AI Technical Summary

Problems solved by technology

The main disadvantage of the existing sampling valve is: in the process of sampling high-pressure, toxic and dangerous media, when the valve is opened, the high-pressure medium is easy to spray and splash out from the pressure sampling port, causing injury to the operator and environmental pollution, and the operation is safe. poor sex

[0006] However, the inner layer of the double sampling valve in the above patent and the double sampling valve in the prior art often adheres to the sampled medium. When sampling each time, the medium adhered to the inner layer of the valve during the previous sampling process will Mixed into the current sampling medium, resulting in impure sampling and increasing the sample detection error

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