Smoke exhaust fireproof valve

Abstract

The invention discloses a smoke exhaust fireproof valve. The smoke exhaust fireproof valve comprises a valve frame assembly, a valve plate assembly and a valve pipe with a square section, wherein the left end of the valve pipe is an inlet end, the left end of the valve pipe is an outlet end, an annular protruding shoulder is arranged on the inner side wall of the valve pipe and provided with a first rail groove, an upper notch and a lower notch are formed in the outer side of the valve pipe, an upper rail assembly is arranged at the upper notch of the upper end of the valve pipe, and a lower rail assembly is arranged at the lower notch of the lower end of the valve pipe. The valve frame assembly is connected with the valve plate assembly and slides in the first rail groove or the lower rail assembly. The valve plate assembly is connected into the first rail groove or the upper rail assembly in a sliding manner, and a power assembly is arranged on the valve pipe. The outer side, close to the inlet end, of the valve pipe is spirally wound with a cold water pipe rightwards, and the outer side, at the water outlet end of the cold water pipe, of the valve pipe is provided with a valve control assembly. The smoke exhaust fireproof valve is simple in structure, and dust and impurities can be prevented from stopping a valve plate from being closed.

Description

technical field [0001] The invention relates to the field of fire dampers, in particular to a smoke exhaust fire damper. Background technique [0002] Smoke exhaust dampers are usually installed in large smoke exhaust piping systems. It is installed on the air supply pipeline of the ventilation and air conditioning system and is normally open. In the event of a fire, when the temperature of the flue gas in the pipeline reaches 70°C, it will be closed, and within a certain period of time, it can meet the requirements of the amount of smoke leakage and the integrity of the fire resistance, and act as a valve for isolation and fire resistance. Existing smoke exhaust fire dampers still have some disadvantages in use: [0003] 1. During the use of the fire damper, it is open for a long time, and there will be a lot of impurities and dust accumulated in the fire damper in the exhaust duct, so that the dust and impurities will prevent the valve plate from closing when the fire da...

AI Technical Summary

Problems solved by technology

[0003] 1. During the use of the fire damper, it is open for a long time, and there will be a lot of impurities and dust accumulated in the fire damper in the exhaust duct, so that the dust and impurities will prevent the valve plate from closing when the fire damper is closed, making the fire prevention The valve cannot be fully closed;

[0004] 2. When a fire breaks out in the flue, after a long period of fire, the valve plate group will heat up and expand, deform, and the opening and closing operations cannot be realized.

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