Manual electric double control baffle type one-way overspeed closing valve

Abstract

A manual electric double-control baffle type one-way overspeed shut-off valve, including a housing, a machine cover arranged on the top of the housing, an oil inlet and an oil outlet, a bottom plate, a stand on the bottom plate, a valve plate assembly and a manual The control assembly, the valve plate assembly includes the active plate hinged on the bottom plate, the reed switch limited in the cavity, the magnet steel I installed on the top of the active plate, the valve plate, the magnetic steel II, and the valve plate set between the active plate and the bottom plate. The tension spring between them is characterized in that: the manual control assembly includes a manual rotating shaft limited on the oil outlet, a manual dial arranged on the manual rotating shaft, and a handle arranged outside the housing to control the rotation of the manual rotating shaft; A flow rate adjustment device is provided; a steel block is provided on the inner wall of the cavity near the oil outlet. It fundamentally solves the problems that the closing flow rate threshold of the existing overspeed shut-off valve is difficult to adjust, it is easy to cause false alarms, and the valve plate is easy to bounce when it is closed. It has the advantages of convenient use, safety, reliability, and high accuracy.

Description

technical field [0001] The invention belongs to the field of non-return valves, and is specifically a manual electric double-control baffle type one-way overspeed closing valve, which is mainly suitable for oil-immersed transformers with nitrogen-filled fire extinguishing devices. Background technique [0002] The existing overspeed shut-off valve has two main types of valve plate sealing: one is that the hinge point of the active plate is above the valve plate, and the valve plate is kept in an upward opening state by the action of magnets and tension springs. The pulling force direction of the extension spring is opposite to the attracting direction of the magnet, the valve plate is not easy to obtain a stable working state, and it is easy to generate false alarms due to the influence of vibration. After the false alarms, the transformer must be manually reset after power failure; The top of the valve plate hangs naturally by gravity, and the sealing surface and the valve ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a manual electric double-control baffle type one-way overspeed shut-off valve, which fundamentally solves the problem that the closing flow rate threshold of the existing overspeed shut-off valve is difficult to adjust, easily leads to false alarms, and is easy to pop open when the valve plate is closed. It has the advantages of convenient use, safety and reliability, and high accuracy.

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