Negative pressure sensing type automatic temperature control opening and closing fireproof smoke exhaust valve

Abstract

The invention discloses a negative pressure sensing type automatic temperature control opening and closing fireproof smoke exhaust valve. The valve comprises a valve cylinder, wherein two driving cavities are vertically and symmetrically formed in the inner wall of the valve cylinder, a control pipe shaft is rotationally inserted into the inner wall of the valve cylinder, a hollow shaft sleeve ismounted on the side wall, away from the inner wall of the valve cylinder, of each driving cavity, and the two ends of the control pipe shaft extend into the two driving cavities respectively and are rotationally inserted into the two hollow shaft sleeves respectively. According to the valve, negative pressure generated by a smoke exhaust fan is sensed through piston pieces, the control pipe shaftand a hollow sealing cover are driven by sliding rods, grooved columns and driving gears to open the valve cylinder to exhaust smoke, pressure capsules are expanded by heat to absorb hydraulic fluid in pressure grooves so as to enable spring bolts to unlock the piston pieces, and the piston pieces return after losing the negative pressure of the smoke exhaust fan to drive the control pipe shaft and the hollow sealing cover to rotate reversely to close the valve cylinder, so that the functions of negative pressure sensing automatic temperature control opening and closing are achieved, electriccontrol and frequent overhauling are not needed, and the stability is high.

Description

Technical field [0001] The present invention relates to the field of exhaust valve, and more particularly to a negative pressure perceptual automatic temperature control opening and closing fire dispenser. Background technique [0002] The exhaust valve is one of the common equipment for building fire. It is usually installed on the ceiling of each floor. The plurality of exhaust valves are connected to the exhaust fan through the exhaust pipe, so that a single exhaust fan can control multiple exhaust valves to open the smoke The normally closed exhaust valve is arranged in the building to ensure the relative enclosure of the room, reducing the energy consumption of the air conditioner, and the normally closed exhaust valve needs to open, and it can be turned off in time when the smoke temperature is too high, so The exhaust valve is required. [0003] The existing normally closed exhaust valve is usually electronic drive type, and the operating mechanism is constituted by the mo...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings of the existing technology that the electronic drive is susceptible to high temperature interference, poor stability, and low reuse rate, requiring frequent maintenance, and proposes a negative pressure sensing type automatic temperature control opening and closing fire protection exhaust valve

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