Telescopic powder conveying pipe device

Abstract

The invention discloses a telescopic powder conveying pipe device which uses a telescopic boom as a carrier and mainly comprises moving pipes, fixed pipes, a dust scraping device, sealing rings, upper and lower bearings and the like, wherein the fixed pipes are fixedly connected with a fixed arm; the moving pipes are fixedly connected with a moving arm; each section of moving pipe is provided with a bearing; the sealing rings form sealing between the moving pipes and the fixed pipes; the upper and lower bearings not only are used as carriers of the sealing rings, but also used for axial limiting between the moving pipes and the fixed pipes. The telescopic powder conveying pipe device not only solves the problem of conveying powder required for high-rise fire extinguishment, but also improves the fire extinguishment function of a conventional water tower fire truck and changes fire fighting tactics of high-rise buildings, or large-scale petrochemical, and coal chemical production and storage devices and the like.

Description

Technical field: [0001] The invention relates to a telescopic powder conveying pipe device, which belongs to the technical field of conveying pipes in fire extinguishing equipment. Background technique: [0002] At present, on the high-spray truck with telescopic boom structure, the sealing method of the telescopic pipe used to transport the fire extinguishing agent adopts the upper sealing method, and the supporting sleeve adopts the threaded connection method; firstly, the telescopic pipe adopts the upper sealing method when conveying water or mixing There is no problem in the case of liquid medium such as liquid, because the fast-flowing liquid medium, when entering the gap between the fixed tube and the moving tube or the two moving tubes, plays a certain lubricating role, and can smoothly transport the liquid fire extinguishing agent to the specified height; the experiment It proves that the requirements are not met when the powder-gas mixture is transported, because th...

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Problems solved by technology

[0002] At present, on the high-spray truck with telescopic boom structure, the sealing method of the telescopic pipe used to transport the fire extinguishing agent adopts the upper sealing method, and the supporting sleeve adopts the threaded connection method; firstly, the telescopic pipe adopts the upper sealing method when conveying water or mixing There is no problem in the case of liquid medium such as liquid, because the fast-flowing liquid medium, when entering the gap between the fixed tube and the moving tube or the two moving tubes, plays a certain lubricating role, and can smoothly transport the liquid fire extinguishing agent to the specified height; the experiment It proves that the requirements are not met when the powder-gas mixture is transported, because the powder has a certain degree of adhesion. When the powder-gas mixture quickly flows into the gap between the fixed tube and the moving tube or the two moving tubes, it will adhere to a certain amount on the tube arm. When the attached dust particles reach a certain amount, the telescopic tube and the carrier (telescopic arm) will not be able to move synchronously, and finally the carrier (telescopic arm) will not work properly. Even damaged, it is impossible to deliver the powder to the specified height

Secondly, the support sleeve adopts the threaded connection method, which has great defects for the later maintenance and replacement of the dust scraper and sealing ring, because the threaded connection not only needs to use special tools when disassembling, but also requires a certain space

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