Electrical valve

Abstract

There is disclosed an electrically operated valve using a motor disposed outside a hand valve body. The motor has a control means controlling its work. Using a driving mechanism connects and drives the valve stem for opening and closing the valve. A spacing means in the valve and a overtravel-limit switch is used for limiting rotation range of the valve stem. When the valve uses a ball valve, the said motor can use DC motor with a speed reducer is connected with the valve stem via a gear pair, a friction wheel pair or a belt driving device. A driven gear or a driven friction wheel on the valve stem uses a fan wheel.

Description

technical field [0001] The invention relates to an electric valve. technical background [0002] Existing valves mainly include manual and electric two types. Among them, the valve body of existing manual valves (such as ball valves, butterfly valves, gate valves, etc.) is provided with a movable part for opening and closing the valve. The movable part rotates the valve stem, which extends from the top of the valve body to the outside of the valve body. There is also a handle, and the valve can be opened and closed by turning the valve stem through the handle. The defect of this type of valve is that it must be switched manually, which is not only troublesome to operate, but also cannot be controlled automatically or remotely. It is a solenoid valve, and there is an electromagnet in the valve body. The electromagnet is mainly composed of a coil wound on a silicon steel sheet. After being energized, it relies on the magnetic force of the electromagnet to attract the same mag...

AI Technical Summary

Problems solved by technology

Among them, the valve body of existing manual valves (such as ball valves, butterfly valves, gate valves, etc.) is provided with a movable part for opening and closing the valve. The movable part rotates the valve stem, which extends from the top of the valve body to the outside of the valve body. There is also a handle, and the valve can be opened and closed by turning the valve stem through the handle. The defect of this type of valve is that it must be switched manually, which is not only troublesome to operate, but also cannot be controlled automatically or remotely. It is a solenoid valve, and there is an electromagnet in the valve body. The electromagnet is mainly composed of a coil wound on a silicon steel sheet. After being energized, it relies on the magnetic force of the electromagnet to attract the same magnetic moving parts to realize the opening or closing of the valve. , because the defect of this type of valve is that the electric part is set in the valve body, it is easy to generate sparks or leakage, and there are safety hazards when used in gas pipelines and other occasions. In addition, due to the difference in internal structure between it and manual valves, the two Or the lack of interchangeability between parts also brings inconvenience to production and maintenance

Images