Variable sampling valve

Abstract

The invention relates to a variable sampling valve. The variable sampling valve comprises a valve body, a valve deck, a sphere, a valve rod, a valve seat and a handle. The middle of the sphere is provided with a sphere hole. A device capable of adjusting the sampling amount is arranged in a valve deck channel and composed of a sample holding groove, a rapid discharging door, a door rod, a hand wheel and a spring. The sample holding groove is movably mounted in a pipeline and is in sealing fit with the contact face of the inner wall of the valve deck channel. An opening is formed in the lower portion of the sample holding groove. The rapid discharging door is arranged on the opening. One end of the door rod is fixedly connected with the rapid discharging door. The other end of the door rodis fixedly connected with the handle. The spring is arranged on the lower portion of the outermost side of the outer wall of the sample holding groove. The sample holding groove adopts the conical bottom design. A reticle lens is arranged on the valve deck. The variable sampling valve has the advantages that a ball valve structure is adopted, connection and disconnection of the sampling valve andthe pipeline can be achieved rapidly, in the disconnection state, a certain closed cavity can be formed by the sphere and the sample holding groove, by pulling the sample holding groove downwards through the hand wheel, the size of the closed cavity can be changed, operation is convenient, and the sampling amount can be controlled.

Description

technical field [0001] The invention belongs to the field of valves, in particular to a sampling valve for a fluid pipeline. The invention is suitable for sampling of corrosive, volatile, flammable, poisonous and harmful media. Background technique [0002] The sampling valve is installed on the medium delivery pipeline to sample the medium in the pipeline, and then the medium sample is tested and tested. There are many structures of sampling valves, but the sampling valves used for sampling corrosive, volatile, toxic and harmful media in the prior art generally have problems such as troublesome operation, difficult control of sampling volume, and poor sealing performance. Contents of the invention [0003] The object of the present invention is to design and develop a variable sampling valve with simple operation, controllable sampling volume, good sealing performance and applicable to corrosive, volatile, poisonous and harmful medium working conditions according to the ...

AI Technical Summary

Problems solved by technology

There are many structures of sampling valves, but the sampling valves used in the prior art for sampling corrosive, volatile, toxic and harmful media generally have problems such as troublesome operation, difficult control of sampling volume, and poor sealing performance.

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