Stop valve for cast iron ship

Abstract

The invention discloses a stop valve for a cast iron ship. The stop valve comprises a valve body. A water outlet and a water inlet are separately formed in the left and right ends of the valve body; mounting plates are arranged on the end surfaces, far away from the valve body, of the water outlet and the water inlet; a cone-shaped cap is arranged at the top end of the valve body; the top end of the cone-shaped cap is of a closed structure; a valve rod is arranged in the valve body; the valve rod penetrates the top end of the cone-shaped cap; the valve rod is of a structure, the upper end of which is a smooth cylinder and the lower end of which is a trapezoidal thread; the valve rod is rotated by using a handwheel fixed by a nut. As the valve rod is engaged to a nut of the valve rod, the valve rod ascends or descends by means of a principle of an acting force and a counteracting force. As sealing filler is arranged between the valve rod and the cone-shaped cap, a medium can be prevented from overflowing from the top of the valve body to leak. The valve rod and a rotary shaft are made from high carbon alloy steel, so that the strength is higher. As a result of a special structural design of a rotary shaft seat, the rotary shaft and a valve clack can rotate independently, and the valve rod can meet the demand on push-and-pull stress of the valve clack. The equipment is more reasonable and compact in integral structure and higher in reliability.

Description

technical field [0001] The invention relates to the technical field of globe valve equipment, in particular to a cast iron marine globe valve. Background technique [0002] Globe valves are widely used in the shipping industry. The opening and closing of ordinary marine globe valves is realized by controlling the valve stem to drive the valve disc to rise and fall relative to the water flow channel in the valve body. However, the traditional globe valve is not only complicated in structure Production and with the wear and tear of use and material aging, it is difficult to guarantee the sealing performance. Therefore, we propose a cast iron marine globe valve to solve the above problems. Contents of the invention [0003] The object of the present invention is to provide a cast iron marine globe valve to solve the problems raised in the above background technology. [0004] In order to achieve the above object, the present invention provides the following technical solutio...

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Problems solved by technology

[0002] Globe valves are widely used in the shipping industry. The opening and closing of ordinary marine globe valves is realized by controlling the valve stem to drive the disc to lift relative to the water flow channel in the valve body. However, the traditional globe valve is not only complicated in structure, but also unfavorable Production and with the use of wear and tear and material aging, the sealing performance is difficult to guarantee, so we propose a cast iron marine globe valve to solve the above problems

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