A kind of stop valve with dynamic sampling

Abstract

The invention discloses a shut-off valve capable of dynamic sampling, belonging to the field of shut-off valves. A shut-off valve capable of dynamic sampling comprises a valve body. When water flows in an accumulating bucket and a return pipe, the flow velocity of the water is accelerated through a spiral rifling, The accelerated water flow enters the valve body again through the one-way water outlet. When the water flow re-enters the valve body, the accelerated impact force will break the static state of the water flow, so that an undercurrent is formed in the water flow, which is used to continuously maintain the water flow in the inner cavity of the sampling vessel. Real-time "dynamic update", due to the existence of the one-way water outlet, the water flow in the valve body will not enter the return pipe from the water outlet of the return pipe, so that the water flow inside the return pipe has one-way flow, which accelerates the water flow carried by the water flow. The impact force will impact the arc filter, reduce the possibility of impurities sticking to the surface of the arc filter for a long time, improve the filtering effect of the arc filter, and reduce the possibility of clogging of the arc filter.

Description

technical field [0001] The present invention relates to the field of shut-off valves, more particularly, to a shut-off valve capable of dynamic sampling. Background technique [0002] The globe valve, also known as the cut-off valve, is one of the most widely used valves. The reason why it is popular is that the friction between the sealing surfaces during the opening and closing process is small, it is more durable, the opening height is not large, and it is easy to manufacture. , easy maintenance, not only suitable for medium and low pressure, but also suitable for high pressure, the closing principle of the globe valve is to rely on the pressure of the valve stem to make the sealing surface of the valve disc and the sealing surface of the valve seat closely fit to prevent the flow of the medium. It has been stipulated that the flow direction of the globe valve shall be from top to bottom, so there is directionality during installation. The structural length of the globe v...

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Problems solved by technology

[0002] Globe valve, also called cut-off valve, is one of the most widely used valves. The reason why it is popular is that the friction between the sealing surfaces is small during the opening and closing process, it is relatively durable, the opening height is not large, and it is easy to manufacture. , easy maintenance, not only suitable for medium and low pressure, but also suitable for high pressure. The closing principle of the globe valve is to rely on the pressure of the valve rod to make the sealing surface of the valve disc and the sealing surface of the valve seat fit closely to prevent the flow of medium. my country's valve "three modernizations" "Give" has stipulated that the flow direction of the globe valve should be from top to bottom, so there is directionality during installation. The structural length of the globe valve is larger than that of the gate valve. At the same time, the fluid resistance is large, and the sealing reliability is not strong during long-term operation.

[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 sampling cannot be performed. If sampling is performed when the shut-off valve is idle, it is necessary to disassemble the valve connected to the shut-off valve. The pipeline is then sampled, which is very troublesome to operate

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