Double disc type overpressure control valve

Abstract

The invention relates to a double-valve-disk type overpressure control valve, comprising a main valve and a controller, wherein the main valve is provided with a front valve disk at the front part of a valve body, and an anti-shock valve disk assembly at the rear part of the valve body, a step motor is mounted on a mounting base in the valve body, the front part of a transmission shaft of the step motor is connected with the front valve disk, the rear part of the transmission shaft is connected with a limiting plate, two independent half rear valve disks of the anti-shock valve disk assembly are rotatably connected onto a connection shaft, two bearing sides of a torsional spring sleeving the connection shaft abut against the rear parts of the respective rear valve disks, the controller receives a pressure signal of a pressure gauge for detecting the pressure of a target cabin, compares the received pressure signal with a set threshold value, and controls the step motor to move and drive the transmission shaft to move axially for automatically adjusting the pressure of the target cabin, and the controller receives a travel switch signal to drive the step motor to open and close the front valve disk. The double-valve-disk type overpressure control valve is compact in structure, realizes smooth release of micro-differential pressure, can realize automatic adjustment of needed pressure, and has strong shock resistance, and the work reliability is improved.

Description

technical field [0001] The invention relates to a double-valve disc overpressure control valve, which is used in the technical field of overpressure control valves. Background technique [0002] At present, in some specific sealed spaces, such as highly ultra-clean pharmaceutical workshops, anti-virus aseptic operating rooms, ship warehouses and other specific sealed space environments, in order to prevent outdoor toxic and harmful gases from entering the room, it is necessary to keep the room always Keep the ultra-micro pressure below 800Pa higher than the outdoor, so that the indoor personnel can still work and live normally under the condition of slight pressure. Vents are installed on the chamber walls of these sealed spaces for this reason, and control valves are installed on the vents or vent pipes to replace the indoor air to keep the indoor staff working and living for a long time. [0003] The micro-differential pressure control valves currently used are all single...

AI Technical Summary

Problems solved by technology

[0003] The micro-differential pressure control valves currently used are all single-valve disc structure. The single-valve disc control valve has a large structural volume, and when the impact pressure occurs inside, there is a problem of weak resistance to impact.

At the same time, when the single-valve disc control valve is used for the discharge of large air volume and high flow rate, it is easy to generate whistling noise at the control valve, which will cause the deterioration of the workpiece environment

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