Twin-stage impeller high-pressure axial flow draught fan for shipbuilding

Abstract

The invention relates to the technical field of draught fans, in particular to a twin-stage impeller high-pressure axial flow draught fan for shipbuilding. The twin-stage impeller high-pressure axial flow draught fan for the shipbuilding comprises a draught fan body, wherein the draught fan body is composed of impellers, a motor, a wind barrel, guide vanes, a support and an electric control device. The twin-stage impeller high-pressure axial flow draught fan for the shipbuilding is characterized in that a wind collecting device, a reducer pipe and flow collecting devices are arranged, the reducer pipe and the wind collecting device are respectively formed by drawing a metal plate around to form a tubular shape, the reducer pipe is in a frustum shape, the wind collecting device is in a horn shape, the wind outlet end of the wind barrel is connected with the small-diameter end of the reducer pipe, the wind inlet end of the wind barrel is connected with the small-opening end of the wind collecting device, a protection screen is arranged at the large-opening end of the wind collecting device, a flow collecting plate is arranged at the large-diameter end of the reducer pipe, more than two flow collecting holes are formed in the circumference of the flow collecting plate, the flow collecting devices are arranged in the flow collecting holes, each flow collecting device is formed by a channel, a wind volume regulating valve and a protecting screen, the channels are in a cylindrical tube shape, the wind volume regulating valves are arranged on the channels, the protecting screens are arranged at the front ends of the channels, and the rear ends of the channels are fixedly connected with the flow collecting plate. Due to the adoption of the structure, the twin-stage impeller high-pressure axial flow draught fan for the shipbuilding has the advantages of being novel in structure, high in anti-collision strength, high in protecting performance and capable of damping and preventing sliding, meeting the requirements for multiple working stations and adjustable wind volume, having the functions of wind discharging and wind delivery, ensuring the normal starting and normal operation and the like.

Description

technical field [0001] The invention relates to the technical field of fans, in particular to a high-pressure axial-flow fan with two-stage impellers for shipbuilding. Background technique [0002] In the process of ship construction, workers spray paint and weld the cabin in the closed cabin. In order to ensure the personal safety of the workers and the normal working environment, the two-stage impeller high-pressure axial flow fan is usually used to spray the paint mist in the closed cabin. , Toxic gas, dust and combustible gas such as flue gas produced by electric welding are exhausted to the outside. This existing two-stage impeller high-pressure axial flow fan is composed of impeller, motor, blower, guide vane, bracket and electric control device. The blower sits on the support, and there is a motor and an impeller inside the blower. The motor is connected to the electric control device through a wire. The two ends of the motor are respectively equipped with an impelle...

AI Technical Summary

Problems solved by technology

[0002] In the process of ship construction, workers spray paint and weld the cabin in the closed cabin. In order to ensure the personal safety of the workers and the normal working environment, the two-stage impeller high-pressure axial flow fan is usually used to spray the paint mist in the closed cabin. , Toxic gas, dust and combustible gas such as flue gas produced by electric welding are exhausted to the outside. This existing two-stage impeller high-pressure axial flow fan is composed of impeller, motor, blower, guide vane, bracket and electric control device. The blower sits on the support, and there is a motor and an impeller inside the blower. The motor is connected to the electric control device through a wire. The two ends of the motor are respectively equipped with an impeller, and the impeller is provided with a guide vane. The reason is that the fan cannot meet the requirements of multi-station and long-distance air supply. Second, during work, due to the need for frequent transitions, the fan is easy to collide or fall over during the handling process, resulting in deformation of the fan cylinder and causing the blades of the impeller to be damaged. Rubbing or jamming with the blower tube will cause the fan to fail to operate normally, and even cause damage to the fan; third, the fan will vibrate greatly during use, and there is no anti-skid measure; fourth, due to the low voltage and large fluctuations of the shipyard, Can not guarantee the normal start and operation of the fan

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