Fireproof check valve with internal and external double fireproof functions

Abstract

The invention provides a fireproof check valve with internal and external double fireproof functions. The fireproof check valve comprises a valve body, a valve clack capable of being opened and closed and a fireproof execution device, the valve body is installed on the outer portion of a residence exhaust passage, and the fireproof execution device comprises a support, a rotating shaft, an elastic piece, a fireproof execution piece, an outer temperature sensing piece and an inner temperature sensing piece; the support is arranged on the valve body and located on the back side of the valve clack, the rotating shaft is arranged on the support, the elastic piece is located at the rotating shaft, the fireproof execution piece is provided with a connecting part and an acting part, and the connecting part of the fireproof execution piece is connected with the rotating shaft; a through hole is formed in the valve body, the outer temperature sensing piece is located on the outer side of the valve body and communicates with the indoor environment, the inner temperature sensing piece is located on the inner side of the valve body and communicates with the inner environment of the residence exhaust passage, the outer temperature sensing piece and / or the inner temperature sensing piece penetrate / penetrates through the through hole, and the inner temperature sensing piece is used for limiting the fireproof execution piece and compressing the elastic piece at the same time; and the fireproof check valve can sense the indoor temperature change and the temperature change in the residence exhaust passage in time, and has the advantages of being simple in structure and high in practicability.

Description

Technical field [0001] The present invention belongs to the technical field of fire check valve, the check valve particularly relates to fire one kind comprising inner and outer dual function of fire. Background technique [0002] Fire is an important part of the check valve housing exhaust system, its main role is divided into the following three aspects: [0003] 1) diversion effect: the guide household smoke upwardly into the interior of the house organized exhaust passage, finally exhausted from the roof, to achieve high emissions. Residential prevent the exhaust passage at the air inlet and the air curtain formed vortex, reduced smoke emission resistance. [0004] 2) the non-return effect: when the discharge gas, the valve flap or hood fan driven by wind opened, allowing the flue gas flow into the exhaust passage; when the smoke emission is stopped, the valve flap gravity / spring force under the action of automatically shut down to prevent recirculation zone, to avoid smoke...

AI Technical Summary

Problems solved by technology

[0008] However, the fire prevention structure adopted in the prior art is either to carry out external fire protection for the exhaust duct of the residence, or to carry out internal fire protection for the interior, or to set up two sets of fire prevention structures corresponding to the exhaust duct of the residence and the interior respectively, thus resulting in fire prevention. The structure of the check valve is extremely complicated, and the fireproof structure is placed in the exhaust passage, resulting in increased exhaust resistance

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