Fireproof check valve and double-open non-return door plate thereof

Abstract

The invention discloses a fireproof check valve and a double-open non-return door plate thereof. The fireproof check valve comprises a metal cylinder and a metal non-return door frame located in the metal cylinder and arranged in an inclined manner. The double-open non-return door plate capable of being opened and closed is symmetrically arranged on the metal non-return door frame. A fireproof temperature sensing device is arranged on the portion, located above the symmetry axis of the double-open non-return door plate, in the metal cylinder. The double-open non-return door plate comprises a metal non-return door plate symmetrically arranged in a valve body and capable of being opened and closed. The metal non-return door plate comprises an upper door plate, a lower door plate and D-shapedsilica gel seal rings. The upper door plate and the lower door plate are fixedly connected with each other and are each stamped into a cutting edge shape, and the D-shaped silica gel seal rings are buckled and pressed on the peripheries of the upper door plate and the lower door plate and used for sealing a valve body opening.

Description

technical field [0001] The invention relates to a check valve, in particular to a fireproof check valve and a double-opening check door panel. Background technique [0002] The check valves used for public flue or external wall direct discharge put forward higher requirements for the opening effect, fire performance and sealing effect of the check door panels, but the current check valves have many defects, such as , the non-return door panel rotates around the connecting shaft. Because the contact surface of the connecting shaft is large, it is easy to be stained with oil. During use, the non-return door panel is often stuck during the rotation process, so that only part of it can be opened, not all or can not be opened. Completely return to the position, thus affecting the ventilation effect and the effect of preventing smoke return in the same period of time; in addition, although the fire prevention device is installed, the structure is complicated, the production cost i...

AI Technical Summary

Problems solved by technology

[0002] The check valves used for public flue or external wall direct discharge put forward higher requirements for the opening effect, fire performance and sealing effect of the check door panels, but the current check valves have many defects, such as , the non-return door panel rotates around the connecting shaft. Because the contact surface of the connecting shaft is large, it is easy to be stained with oil. During use, the non-return door panel is often stuck during the rotation process, so that only part of it can be opened, not all or can not be opened. Completely return to the position, thus affecting the ventilation effect and the effect of preventing smoke return in the same period of time; in addition, although the fire prevention device is installed, the structure is complicated, the production cost is high, and it is easy to fail, and the fire resistance performance is poor; at the same time, the odor of the flue The phenomenon happens from time to time, and the room is full of peculiar smell, which seriously affects the health of family members

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