A globe valve capable of dynamic sampling

Abstract

The invention discloses a stop valve capable of dynamic sampling, which comprises a valve body, a valve cover, a flow channel, a valve stem, a valve core and a valve seat; The sampling inlet, the opening and closing device, the sampling flow rate adjustment device, the filter element and the sampling outlet in the housing; the sampling flow rate adjustment device includes a primary adjustment assembly and a secondary adjustment assembly located below the primary adjustment assembly; the primary adjustment assembly includes an inner shell, A primary elastic compression part, a push plate and a ball; a secondary adjustment component includes a branch channel and a secondary elastic compression part. The invention has the following advantages and effects: when the shut-off valve is in the working state, sampling operation can be performed on the flowing fluid medium, which is convenient for docking with subsequent equipment.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a stop valve capable of dynamic sampling. Background technique [0002] Globe valve, also known as cut-off valve, is a forced sealing valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface not to leak. When the fluid medium enters the valve from the bottom of the valve disc, the resistance that the operating force needs to overcome is the friction force between the valve stem and packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve The diameter of the stem should be large, otherwise the failure of the stem to bend will occur. When the globe valve is working, the valve stem is used to drive the reciprocating movement of the valve disc, so as to realize the communication or isolation of the flow channel. [0003] In order to determine the...

AI Technical Summary

Problems solved by technology

[0003] In order to determine the parameters of the fluid medium in the shut-off valve channel, it is necessary to sample it, but the shut-off valve will seal the flow channel in a fully closed state and cannot be sampled

If sampling is carried out when the stop valve is idle, the pipe connected to the stop valve needs to be disassembled and then sampled. The operation is very troublesome, and the amount of fluid medium in the stop valve is small, so it is impossible to take a large number of samples and perform big data comparison

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