Seawater-corrosion-preventing shuttle type valve operation mechanism

Abstract

The invention discloses a seawater-corrosion-preventing shuttle type valve operation mechanism. The seawater-corrosion-preventing shuttle type valve operation mechanism comprises a driving device, a valve rod, a connecting gear and a stopping device; the valve rod is vertically arranged, the upper end of the valve rod is connected with the driving device, the lower portion of the valve rod is located in a fairing of a valve, and the lower end of the valve rod is machined to form a taper gear; the connecting gear and the valve rod are coaxially arranged, the connecting gear is a taper gear matched with the lower end of the valve rod, and the connecting gear is connected with the bevel gear at the lower end of the valve rod; and the connecting gear is connected with the stopping device through a trapezoidal thread. According to the seawater-corrosion-preventing shuttle type valve operation mechanism, a bevel gear mechanism is applied to the valve rod of the shuttle type valve and is connected with the stopping valve, and opening and closing of the valve are controlled by transmission of force moment from the valve rod to the stopping device. The system is small in size and can be completely arranged in the fairing of the shuttle type valve, isolation of media from valve internal pieces like the valve rod is achieved through a stuffing box, the reliability of the valve in the using process is guaranteed, and the service life of the valve is prolonged.

Description

technical field [0001] The invention relates to an operating mechanism of an anti-seawater corrosion shuttle valve used in the field of valves. Background technique [0002] The transmission of the traditional shuttle valve or check valve adopts a worm gear mechanism or a connecting rod structure. In the worm gear mechanism, since the turbine needs to be parallel to the worm in the radial direction, the distance between the worm and the fairing is relatively large, and it is impossible to form a closed cavity between the worm and the fairing. When working in seawater medium, the seawater medium will corrode the force or transmission parts of the valve stem, turbine worm, etc. If the sediment in the seawater medium enters between the transmission gear webs, it will also cause damage to the tooth surface or even get stuck. Valve; the movement space of the connecting rod mechanism is larger, and the sealing between the valve stem and the fairing cannot be realized, and the tra...

AI Technical Summary

Problems solved by technology

In the worm gear mechanism, since the turbine needs to be parallel to the worm in the radial direction, the distance between the worm and the fairing is relatively large, and it is impossible to form a closed cavity between the worm and the fairing.

When working in seawater medium, the seawater medium will corrode the force or transmission parts of the valve stem, turbine worm, etc. If the sediment in the seawater medium enters between the transmission gear webs, it will also cause damage to the tooth surface or even get stuck. Valve; the movement space of the connecting rod mechanism is larger, and the sealing between the valve stem and the fairing cannot be realized, and the transmission torque of the connecting rod mechanism is small

Images