The utility model discloses a fire-proof check valve, which comprises a valve body, an air inlet is arranged on the front side of the valve body, the back side of the air inlet is equal to the inner wall of the valve body, a cover plate is arranged on the back side of the air inlet, a connecting seat is provided on the side of the cover plate, and a rotating shaft seat corresponding to the connecting seat is arranged in the valve body, and the connecting seat is reversed through the connecting seat. The spring is connected with the rotating shaft seat, the front side of the cover plate is also provided with a pulling ring, the upper end of the air inlet has a first through hole and a second through hole, and the valve body above the air inlet also has a third through hole, one end of a steel wire is connected with a pulling ring, the other end of the steel wire passes through the first through hole and bends and penetrates a second through hole and is arranged in the inlet. The counterweight block in the air port is connected, the bending part of the steel wire is inserted into the third through hole and connected with a fuse clasp arranged on the side of the valve body. The utility model has the advantages of simple structure, low manufacturing cost, and the fire in the exhaust flue can be effectively prevented from entering the room after the fire is ignited.
【技术实现步骤摘要】
一种防火止回阀
本技术涉及防火止回阀。
技术介绍
中国专利201720242009.2公开了一种用于防火止回阀的锁止结构及防火止回阀,包括阀座、连杆、拨片、感温元件和弹性元件,所述连杆和所述拨片与所述阀座转动连接,所述感温元件与所述阀座固定连接,所述弹性元件一端与所述阀座固定连接,所述弹性元件另一端与所述拨片连接并驱动所述拨片与所述感温元件相抵,所述拨片上设有卡接部,所述连杆上设有与所述卡接部相匹配的卡接配合部,这种锁止结构结构复杂、部件繁多,生产成本高,尤其是,该锁止结构锁止结构设置在烟气进口处,排气烟道内着火后并不会烧到锁止结构,直到火通过翻板进入室内才能起到作用,这时候已经迟了,不能有效的防火。
技术实现思路
本技术目的在于克服上述现有技术的不足,提供一种成本低廉、更加可靠的防火止回阀。本技术的技术方案是:一种防火止回阀,包括阀体,所述阀体的前侧设有进气口,所述进气口的后侧与所述阀体的内侧壁相齐平,所述进气口的后侧还设有一盖板,所述盖板的侧面具有一连接座,所述阀体内设有一与所述连接座相对应的转轴座,所述连接座通过回位簧与所述转轴座相连接,所述盖板的前侧还具有一拉环,所述进气口的上端具有第一通孔和第二通孔,位于所述进气口上方的所述阀体上还具有第三通孔,一钢丝的一端与所述拉环相连接,所述钢丝的另一端穿过所述第一通孔并弯折后穿入第二通孔与一设置于所述进气口内的配重块相连接,所述钢丝的弯折部插入所述第三通孔并与一设置于所述阀体内侧的熔断卡扣相连接。进一步地,所述阀体、进气口和盖板均为不锈钢材质。进一步地,所述熔断卡扣为塑料熔断卡扣。本技术的有益效果是:本技术结构简单 ...
【技术保护点】
1.一种防火止回阀,包括阀体,所述阀体的前侧设有进气口,其特征在于:所述进气口的后侧与所述阀体的内侧壁相齐平,所述进气口的后侧还设有一盖板,所述盖板的侧面具有一连接座,所述阀体内设有一与所述连接座相对应的转轴座,所述连接座通过回位簧与所述转轴座相连接,所述盖板的前侧还具有一拉环,所述进气口的上端具有第一通孔和第二通孔,位于所述进气口上方的所述阀体上还具有第三通孔,一钢丝的一端与所述拉环相连接,所述钢丝的另一端穿过所述第一通孔并弯折后穿入第二通孔与一设置于所述进气口内的配重块相连接,所述钢丝的弯折部插入所述第三通孔并与一设置于所述阀体内侧的熔断卡扣相连接。
【技术特征摘要】
1.一种防火止回阀,包括阀体,所述阀体的前侧设有进气口,其特征在于:所述进气口的后侧与所述阀体的内侧壁相齐平,所述进气口的后侧还设有一盖板,所述盖板的侧面具有一连接座,所述阀体内设有一与所述连接座相对应的转轴座,所述连接座通过回位簧与所述转轴座相连接,所述盖板的前侧还具有一拉环,所述进气口的上端具有第一通孔和第二通孔,位于所述进气口上方的所述阀体上还具有第三通孔...
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