Connecting rod type overpressure control valve and control method

Abstract

The invention relates to a connecting rod type overpressure control valve and a control method. The overpressure control valve comprises a main body valve, a valve disc, a control device, a connectingrod mechanism and an electric executer; a shaft rod is arranged in the main body valve; one end of the connecting rod mechanism is connected with the electric executer, and the other end of the connecting rod mechanism is connected with the shaft rod; the other end of the shaft rod is connected with the valve disc; a pressure difference sensor is arranged in the control device for detecting a pressure difference between the pressure of a target cabin and external atmosphere; the control device sends corresponding action instructions to the electric executer according to the pressure difference; the electric executer drives the connecting rod mechanism to move, and the shaft rod pushes the valve disc to move, so that a gap between the valve disc and the main valve body is changed, and adjustment of the flow of air passing through the main valve body is achieved; and the connecting rod mechanism realizes conversion from rotation to a linear motion. A larger action travel is provided through the connecting rod mechanism, so that quicker response capacity and higher flow are provided under the valve body structure with the same specification.

Description

technical field [0001] The invention relates to collective protection technology, and relates to a connecting rod type overpressure control valve and a control method. Background technique [0002] As the most effective means for ships to prevent nuclear, chemical and biological pollutants from entering the interior of the ship, collective protection technology has been widely used on various types of ships at home and abroad. The key to collective protection technology is to maintain a stable overpressure in the defense area relative to the outside atmosphere, which requires a complex overpressure control system to achieve. The overpressure control system mainly includes overpressure control valve, pressure relief valve, atmospheric pressure probe, cabin pressure gauge and manual relief valve. Among them, the overpressure control valve is its core equipment. [0003] In the actual use environment at sea, factors such as wind direction change and navigation will produce ma...

AI Technical Summary

Problems solved by technology

The currently used overpressure control valves all adopt linear moving stepper motors, and the movement of the valve disc produces a 1:1 displacement with the movement of the motor, which has the disadvantages of short stroke, slow response, and long adjustment time.

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