Method for processing internal wall of heavy caliber air transmission steel tube
A technology for the inner wall of a steel pipe and a treatment method, which is applied in the direction of pretreatment surface, coating, and a device for coating liquid on the surface, etc., can solve the problems of small peeling force and low efficiency, and achieve high processing efficiency, high efficiency, and construction method simple effect
Inactive Publication Date: 2009-12-30
南京橡塑机械厂有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problems of low efficiency and small peeling force in the existing gas pipeline treatment method, and to invent a large-diameter gas pipeline inner coating that can realize industrialization and automatic production, high efficiency and high bonding strength Construction method
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[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0017] Such as figure 1 shown.
[0018] A method for treating the inner wall of a large-diameter gas transmission steel pipe, which includes the following steps:
[0019] Firstly, end caps are installed on both ends of the steel pipe, and air inlet and outlet holes are processed on the end caps;
[0020] Secondly, make the steel pipe rotate, and spray high-pressure steel shots into the steel pipe from the air inlet and outlet holes at one end of the steel pipe for internal shot peening, and install a dust collector on the air inlet and outlet holes at the other end of the steel pipe to prevent the blasting process. The dust in the dust pollutes the surrounding environment, and the shot blasting operation is repeated until the inner surface roughness of the steel pipe reaches Ra40-60μm;
[0021] Third, move the shot-peened steel pipe to the spraying d...
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Abstract
The invention discloses a large-caliber steel tube inner wall processing method, belonging to the field of pipe inner wall processing method, comprising the following steps: first, both ends of the steel tube are provided with upper end covers, which are processed to has outlet and inlet air through holes; second, rotate the steel tube and shoot the steel shots into the steel tube from one end of the outlet and inlet air through hole; a dust collector is arranged on the outlet and inlet air through hole on the other end of the steel tube to prevent the dust from polluting the environment during shooting; repeat the shot peening operating until the inner surface roughness of the steel tube reaches Ra40 to 60Mum; third, move the steel tube after shot peening process to the spray device and clean the inner wall to remove the dust; fourth, spray the inner surface by utilizing the spraying equipment; fifth, solidify the steel tube under temperature ranging from 40 DEG C to 60 DEG C on the solidifying bed with heating time ranging from 40 to 60 minutes. The method has the advantages of high work efficiency, high intensity and high compressive strength.
Description
technical field [0001] The invention relates to a treatment method for the inner wall of a natural gas transmission pipeline, in particular to a treatment method for the inner wall of a large-diameter natural gas transmission pipeline, in particular to a construction method for the inner coating of a large-diameter gas transmission steel pipe. Background technique [0002] At present, in order to reduce the wall attachment effect in pipelines for natural gas transportation, the inner wall of the pipeline must be treated accordingly to increase its roughness. With the continuous increase of gas transmission distance and pipe diameter, traditional mechanical processing plus brushing The method of coating asphalt and anti-corrosion paint no longer meets its needs. It is not only inefficient, unable to realize industrialization and automatic production, but also has low peel strength. Therefore, a new inner wall treatment method must be developed to meet the needs of development....
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IPC IPC(8): B05D7/24B05D7/14B05D3/00B05C7/00B05C13/02B24C1/10C09D163/00
Inventor 龙云正赵建华李飙顾刘谦葛启维
Owner 南京橡塑机械厂有限公司