A dual-shaft smoke exhaust fire check valve

Abstract

The utility model relates to a double-axis smoke-exhaust and fire-proof check valve, which is used for smoke-exhaust, fire-proof, and anti-smoke prevention in public smoke exhaust ducts of residences, including a valve body, a valve plate, and an actuator. When the valve is closed, the valve plate is perpendicular to the horizontal plane. It is characterized in that the valve plate is provided with two rotating shafts, the upper and lower rotating shafts, and the upper rotating shaft and the lower rotating shaft are hingedly connected by a C-shaped connector. The axis center of the upper shaft is at the center of gravity when the valve plate is closed, and the center of gravity is shifted to the side of the smoke inlet by 10°. By adjusting the position and quantity of the shaft, it is no longer necessary to make the sealing ring of the valve body into an inclined plane as in the traditional method. To ensure that the valve plate has a pressure on the sealing ring.

Description

technical field [0001] The technology relates to a non-return valve used for smoke exhaust and anti-smoke prevention and fire prevention in the public flue exhaust system of residential kitchens and bathrooms. Background technique [0002] At present, most areas of the country require the smoke check valves used in the public flue system to have fire protection function. The existing fire check valves are mainly composed of valve body, valve plate and fire protection actuator. The middle and upper part of the sheet is also in the smoke inlet. In order for the valve plate to smoothly cover the smoke inlet of the valve body when it falls by gravity, the smoke inlet of the valve body must be made into a bevel, and then the bevel is welded to the valve body, which is not only complicated in processing, but also very expensive. It is difficult to find the best position of the rotating shaft, if the position of the rotating shaft is not very good, the sealing effect will be very ...

AI Technical Summary

Problems solved by technology

In order for the valve plate to smoothly cover the smoke inlet of the valve body when it falls by gravity, the smoke inlet of the valve body must be made into a bevel, and then the bevel is welded to the valve body, which is not only complicated in processing, but also very expensive. It is difficult to find the best position of the shaft, if the position of the shaft is not very good, the sealing effect will be very unsatisfactory

In addition, the actuators in the prior art generally do not have a reset function

Therefore, there is a major defect in the existing moving technology

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