Valve with adjustable opening and closing frequency

Abstract

The invention belongs to the technical field of regulating valves and provides a valve with the adjustable opening and closing frequency. The valve comprises a valve body. A water inflow cavity in the valve body is connected with a water outflow cavity through a valve port. A valve element is installed at the valve port and driven by a valve rod to open and close the valve port. The valve further comprises an execution mechanism and a feedback mechanism. The feedback mechanism comprises an impeller arranged in the water inflow cavity. A rotary shaft of the impeller is in key connection with a bevel gear. An installation seat is welded to the top face of the upper cover and rotationally matched with a transverse rod. A conic tooth at one end of the transverse rod is meshed with the bevel gear and a cam making contact with an idler wheel is fixed to the other end of the transverse rod. By the adoption of the valve, the rotating speed of the impeller can be directly adjusted according to the water flow speed, when the water flow speed is large, the opening frequency of the valve element is high, in other words, the moving speed of the valve element is high, and when the water flow speed is low, the opening frequency of the valve element is low, and in other words, the moving speed of the valve element is low. The moving speed of the valve element can be adjusted according to the water flow speed, so that the valve port is intermittently controlled to be opened and closed.

Description

technical field [0001] The invention belongs to the technical field of regulating valves. Background technique [0002] The self-operated valve relies on the self-pressure of the medium flowing through it as the energy to drive the valve to work automatically, without external power supply and secondary instruments. Self-operated regulating valves use the feedback signal (pressure, pressure difference, temperature) at the output end of the valve to transmit to the actuator through the signal tube to drive the disc to change the opening of the valve to achieve the purpose of adjusting pressure, flow and temperature. [0003] The existing self-operated regulating valve structure includes a valve body, a spool, a regulating rod, an actuator, a feedback mechanism, and a control pipeline, wherein a valve channel is opened in the valve body, and the spool is installed in the valve port of the valve channel. When the valve port is opened or closed, the movement of the valve core i...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the above scheme is that in some mechanisms, the opening of the spool needs to be controlled intermittently according to the speed of the water flow. When low, the frequency at which the spool opens (that is, the speed at which the spool moves) is low

At present, there is no structure that can meet the above functions in the control valve.

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