An automatic high-speed three-way switching valve capable of fast switching

Abstract

The invention discloses an automatic high-speed three-way switching valve capable of fast switching. The automatic high-speed three-way switching valve comprises a valve body, an air sucking and exhausting opening, an opening degree control mechanism and a distance measurement mechanism, wherein the opening degree control mechanism is arranged at the upper part of an air exhausting opening and is used for opening or closing the air exhausting opening via a driving mechanism, a valve rod, a pushing plate and a sealing baffle; reflection slit plates which are alternately dark and bright are arranged on the valve rod; pulse laser emitted by a pulse laser emitter is irradiated to the slit pates and is received by a laser sensor; incident and reflective directions of the laser are vertical to the travel direction of the valve rod; a pulse counter is used for counting pulse signals sent by a laser sensor and controlling reversing time of a three-way valve via a number button. Due to the adoption of a linked three-way sliding valve, the opening degree change of a nonlinear ball valve is converted into linear sliding valve displacement; the travel of the valve rod is accurately controlled; the accurate control of the opening degree is improved.

Description

technical field [0001] The invention belongs to the technical field of valves, and in particular relates to an automatic high-speed three-way switching valve capable of fast switching. Background technique [0002] In the pipelines or pathways of important devices in various modern engineering industries, three-way valves are often used to realize the opening and closing of pipelines or pathways through the movement of the valve core to complete the switching of different pipelines or pathways, but the three-way valves currently used Valves are mainly ball valves. Ball valves are widely used in petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceuticals, water conservancy, electric power, municipal, steel and other industries. Ball valves are mainly used for cutting, distributing and changing media in pipelines. The flow direction of the current commonly used valve is composed of a valve body, a spherical valve core, a connecting rod, and a h...

AI Technical Summary

Problems solved by technology

At the same time, the opening, closing, and sealing devices of the usual three-way tee adopt butterfly valve or ball valve structure. The curved surface is not only difficult to process, but also requires high processing accuracy, especially the precision of the joint is higher, and the sealing surface is directly stressed. The seal is easily damaged, the service life is short, and it needs to be replaced frequently, which increases the labor intensity of workers and the trouble of maintenance

What is especially important is that when the existing ball valve is switched, nonlinear motion is used to realize the change of the valve opening of the ball valve, and it is difficult to achieve precise control of the opening. When the time is controlled, the error increases and it is difficult to achieve precise control

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