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Fire-proof and explosion-proof centrifugal fan

A centrifugal fan and explosion-proof plate technology, which is applied in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve the problems of no fireproof function and unsatisfactory explosion-proof effect.

Inactive Publication Date: 2017-02-22
TIANJIN KAIWEIDA VENTILATION EQUIP CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent document 205117812U discloses an explosion-proof centrifugal fan with two layers of grilles, but solid particles smaller than the gap between the grilles are still easy to enter the casing, the explosion-proof effect is not ideal, and it does not have fire protection function

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  • Fire-proof and explosion-proof centrifugal fan

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Embodiment Construction

[0016] The specific implementation, structure, features and effects provided by the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0017] Such as figure 1 The shown explosion-proof centrifugal fan device includes an impeller and a casing 1, and the casing is provided with a grille mechanism for blocking solid particles, and the grille mechanism includes a fixed ring and an inner layer mesh set in the fixed ring. The grille 3 and the outer fireproof grille 2, the grille mechanism is detachably connected to the casing, and the explosion-proof plate 5 is arranged inside the casing of the fan body.

[0018] The mesh grille 3 is connected to the fixed ring through an elastic fixing member. The fan-shaped grille has a plurality of fan-shaped blades, and the plurality of fan-shaped blades are spliced ​​into a circular surface identical to the longitudinal section of the frame. The central angle of the plu...

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Abstract

A fire-proof and explosion-proof centrifugal fan comprises an impeller and a casing; a grille mechanism for blocking solid particles is arranged on the casing and comprises a fixing ring as well as an inner-layer reticular grille and an outer-layer fire-proof grille which are arranged inside the fixing ring; the grille mechanism is detachably connected with the casing; and an explosion-proof plate is arranged inside the casing of a fan body. Compared with the prior art, the fan has the remarkable advantages and beneficial effects as follows: the double-layer grille mechanism prevents the hard solid particles contained in gas from entering the fan from the source, and sector-shaped blades of the fire-proof grille can effectively block partial solid particles and prevent sparks produced due to the fact that the solid particles collide with the casing under the effect of the centrifugal force of the impeller, so that the explosion-proof purpose is achieved; and meanwhile, a fixator can be driven by a fusing screw to rotate, thus, the blades are expanded to form a sealed round section, the isolation effect is realized, and the fire-proof purpose is achieved.

Description

technical field [0001] The invention belongs to the field of ventilation equipment, in particular to a fireproof and explosionproof centrifugal fan. Background technique [0002] The composition of the centrifugal fan includes impeller, casing, inlet collector, deflector, coupling, shaft, motor and other components. Rotating impeller and volute type casing. The function of the rotating impeller is to make the air gain energy; the function of the volute is to collect the air and effectively convert the dynamic pressure of the air into static pressure. The working principle of the centrifugal fan: the centrifugal force generated by the rotation of the impeller makes the air gain kinetic energy, and then part of the kinetic energy is converted into static pressure through the diffuser at the outlet of the volute. In this way, the air at the outlet of the blower fan is exactly the wind flow with a certain static pressure. [0003] Centrifugal fans are widely used in ventilati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/70F04D29/62F04D29/42
CPCF04D29/703F04D29/4226F04D29/626
Inventor 闫绍会
Owner TIANJIN KAIWEIDA VENTILATION EQUIP CO LTD
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