Ventilating duct opening / closing device

Abstract

The invention discloses a ventilating duct opening / closing device which comprises a valve body (8), a valve clack (7) and a valve rod (2), wherein an air outlet is formed in the upper end of the valve body (8), a valve body cover plate (10) is arranged at the bottom of the valve body (8), and an air inlet is formed in one side of valve body (8); a valve deck (3) is arranged at the bottom of the valve body cover plate (10); the valve clack (7) is located in the valve body (8) and corresponds to the air outlet, and a thread groove is formed in the bottom of the valve clack (7); a hand wheel (1) is arranged at the lower end of the valve rod (2), and the upper end of the valve rod (2) penetrates through the valve body cover plate (10) and extends into the valve body (8) to be fixedly connected with the thread groove in the bottom of the valve clack (7) in a threaded mode; a rotor structure is arranged at the position, located at the valve body cover plate (10), of the valve rod (2); the rotor structure of the valve rod (2) is fixed on the valve body cover plate (10) through the valve deck (3). The ventilating duct opening / closing device is installed at a high bevel of a ventilating duct and can open / close the ventilating duct conveniently and easily.

Description

technical field [0001] The invention relates to a ventilation duct opening and closing device. Background technique [0002] Usually, the opening and closing of the ventilation pipeline adopts the stop valve. The ordinary stop valve rotates the hand wheel to make the valve stem rise and fall to drive the valve disc to make a linear displacement parallel to the medium flow direction to achieve the purpose of opening and closing. Since the working medium enters from the channel below the disc, the applied sealing force must be equal to or greater than the sum of the required specific pressure on the sealing surface and the upward force of the medium, resulting in a large force required for opening / closing the valve. [0003] Ordinary globe valves, whether they are straight-through or right-angle, generally require horizontal installation with the handwheel facing upwards, which makes it difficult to operate the valve installed at a high place, especially when installing a righ...

AI Technical Summary

Problems solved by technology

Since the working medium enters from the passage below the disc, the applied sealing force must be equal to or greater than the sum of the necessary specific pressure generated on the sealing surface and the upward force of the medium, resulting in a large force required for opening / closing the valve

[0003] Ordinary globe valves, no matter straight-through or right-angle, are generally required to be installed horizontally with the handwheel facing upwards, which makes the valves installed at high places difficult to operate, especially when installing right-angle valves at high knuckle positions.

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