A passive flameproof device with low wind resistance and implicit dust explosion

Abstract

The invention discloses a passive flameproof device with low wind resistance and hidden dust explosion, which comprises a casing, two ends of the casing are respectively provided with a first pipe end and a second pipe end; In the housing; and the power assist mechanism, including a fixing piece, a sliding rod, a limit component and a boosting component, the fixing piece is fixed in the housing, the sliding rod and the fixing piece form a sliding pair, the sliding rod is connected to the explosion-proof flap, and the limit component and the booster The components are connected with fixed parts. The booster component includes a guide rod connected to the sliding rod. The limit component is used to limit the movement of the sliding rod and the guide rod. The limit component moves so that the sliding rod is coupled with the explosion shock wave under the action of the booster component. The flameproof flap closes the first pipe end. The invention relates to the technical field of dust explosion explosion protection. When dust explosion occurs, the device can effectively improve the closing speed of the explosion protection flap on the basis of maintaining the stability of passive action execution, and can realize complete isolation of the dust explosion propagation process.

Description

technical field [0001] The invention relates to the technical field of dust explosion explosion protection, in particular to a low wind resistance implicit dust explosion passive explosion protection device. Background technique [0002] Dust explosion flameproof device is used for isolation of dust explosion propagation process. At present, most companies involved in the potential risk of combustible powder explosion use passive flameproof devices, but the traditional passive flameproof devices have obvious shortcomings: Due to the limitation of conditions, it cannot be opened at a large angle, and the wind resistance is large, which increases the additional economic cost of operation of the enterprise. On the other hand, the traditional explosion-proof flap valve uses an external counterweight to assist the explosion-proof flap valve to open. Due to the long rotation moment of the counterweight around the rotating shaft and the large mass of the counterweight, the closing...

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Problems solved by technology

At present, most companies involved in the potential risk of combustible powder explosions use passive flameproof devices, but traditional passive flameproof devices have obvious shortcomings: on the one hand, because the flameproof flap is a whole near-circular Due to the limitation of conditions, it cannot be opened at a large angle, and the wind resistance is large, which increases the additional operating economic cost of the enterprise. On the other hand, the traditional flameproof flap valve uses an external counterweight to assist the flameproof flap valve to open. At this time, due to the relatively long rotation moment of the counterweight around the rotation axis and the large mass of the counterweight, the closing process of the flameproof flap valve requires more work from the outside, especially the inertia effect of the counterweight, so that the flameproof flap can be closed in time and completely. It is difficult to close. Moreover, the closure of the traditional flameproof flap valve only depends on the impact of the leading shock wave of the dust explosion. Due to the short distance between the leading shock wave and the chemical reaction front, the traditional flameproof flap valve cannot be closed in a very short time. Complete closure in time, flameproof failure

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