Self-rotation high-pressure-resistant online closed sampling valve

Abstract

The invention discloses a self-rotation high-pressure-resistant online closed sampling valve which comprises a valve body, a plunger assembly and an operating mechanism, and the valve body is provided with a valve cavity with two open ends and a sampling hole communicated with the valve cavity; the plunger assembly is movably inserted into the valve cavity in the vertical direction and comprises a plunger, a plunger head and a sealing piece, the plunger head is sleeved with the sealing piece, and the plunger head is fixedly installed at the lower end of the plunger and tightly presses the sealing piece to form a sealing plug; the operating mechanism is installed on the valve body and used for driving the plunger assembly to move up and down so that the sealing plug can open or close the sampling hole. According to the self-rotation high-pressure-resistant online closed sampling valve, automatic rotation of the hand wheel can be achieved, a sealing piece is reliable and firm in installation and not prone to damage, the sampling valve can be suitable for a high-pressure medium environment, the risk of leakage does not exist, meanwhile, the service life of the sampling valve is greatly prolonged, and the stability of the sampling valve is greatly improved.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a self-rotating high-pressure resistant online hermetic sampling valve. Background technique [0002] At present, in the production of fine chemicals such as pharmaceuticals and petrochemicals, in order to ensure the safe and stable operation of the device and the quality of the products produced, sampling valves are installed in the corresponding sections, and the continuous flow medium in the process pipeline is taken out by operating the sampling valve. Conduct analysis to determine whether the quality of the obtained product is qualified and whether the device is running smoothly, and the operation plan can be adjusted in time according to the analysis results and needs. [0003] A sampling valve generally includes a valve body, a sealing component, and a hand-held operation component, and the sealing component is driven by manually rotating the hand-held operation component t...

AI Technical Summary

Problems solved by technology

Both structures have problems such as complicated process, difficult assembly, and high scrap rate.

And under high-pressure conditions, the metal seal has a large closing torque, and the sealing surface is easy to scratch and cause valve leakage, while the soft seal structure is prone to fall off and damage, resulting in leakage in actual working conditions.

At the same time, the hand-held operating components of the traditional sampling valve still have the risk of being loose and causing leakage, and the related parts will have defects such as fusion and seizure, which will lead to a short service life of the sampling valve and difficult maintenance

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