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Spray-coating process of inner wall of metal pipeline

A technology of metal pipes and processes, applied in the direction of coating, spraying devices, and devices for coating liquid on the surface, can solve the problems of poor spraying effect and low spraying efficiency, and achieve improved quality, easy processing, and convenient and accurate positioning Effect

Active Publication Date: 2017-06-13
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention overcomes the disadvantages of low spraying efficiency and poor spraying effect when spraying the inner wall of a metal pipe with a large diameter by using a long rod spray gun in the prior art, and provides a spraying process for the inner wall of a metal pipe, which mainly realizes the spraying of the inner wall of a large pipe diameter. The goal of one-time uniform spraying on the inner wall of the metal pipe improves the quality of the fired coating on the inner wall of the metal pipe

Method used

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  • Spray-coating process of inner wall of metal pipeline
  • Spray-coating process of inner wall of metal pipeline
  • Spray-coating process of inner wall of metal pipeline

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Such as figure 1 , figure 2 and image 3 As shown, the long-rod spray gun spraying bracket of this embodiment includes a bearing 1, a gun barrel sleeve 2, a pole 3 and a base 6, and the bearing 1 is fixed on the upper end of the pole 3. Specifically, the upper end of the pole 3 is circumscribed For the outer ring of the bearing 1, the outer ring of the bearing 1 is fixed on the upper end of the strut 3 by welding. The gun shaft sleeve 2 is fixed on the inner ring of the bearing 1, and the central axis of the gun shaft sleeve 2 is parallel to the central axis of the bearing 1. Specifically, the gun shaft sleeve 2 is inscribed on the inner ring of the bearing 1, and the gun shaft sleeve 2 It is fixed on the inner ring of the bearing 1 by welding, and the gun barrel sleeve 2 and the bearing 1 constitute the rotating mechanism of the long-barrel spray gun spraying bracket of this embodiment. The upper end of the base 6 is provided with a connecting sleeve 5, and the sid...

Embodiment 2

[0075] The basic structure of the long-stem spray gun spraying bracket of this embodiment is the same as that of Embodiment 1, except that the bearing 1 is a deep groove ball bearing, and the diameter of the inner ring of the bearing 1 is 150 mm.

[0076] The metal pipe inner wall spraying process of the present embodiment comprises the following steps:

[0077] Step 1. Inner wall substrate treatment:

[0078] Prepare the metal pipe to be sprayed, and the inner diameter of the metal pipe is larger than the diameter of the circular atomization circular surface of the long-stem spray gun. The inner wall of the metal pipe is subjected to four operations of sandblasting and rust removal, angle grinder grinding, sandpaper grinding and inner wall preheating in sequence;

[0079] Step 2. Debugging of spraying equipment:

[0080] Assemble the air compressor, pressure paint tank and long-stem spray gun, and adjust the pressure of the pressure paint tank to 0.4MPa;

[0081] Step 3. Lo...

Embodiment 3

[0088] The metal pipe inner wall spraying process of the present embodiment comprises the following steps:

[0089] Step 1. Inner wall substrate treatment:

[0090] Prepare the metal pipe to be sprayed, and the inner diameter of the metal pipe is less than or equal to the diameter of the circular atomization circular surface of the long-stem spray gun, and the inner wall of the metal pipe is subjected to four operations of sandblasting and rust removal, angle grinder grinding, sandpaper grinding and inner wall preheating in sequence ;

[0091] Step 2. Debugging of spraying equipment:

[0092] Assemble the air compressor, pressure paint tank and long-stem spray gun, and adjust the pressure of the pressure paint tank to 0.4MPa;

[0093] Step 3. Long pole spray gun positioning:

[0094]Prepare the spraying bracket of the long-stem spray gun, insert the gun body of the long-stem spray gun into the gun sleeve 2, adjust the depth of the lower end of the support rod 3 extending in...

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Abstract

The invention discloses a spray-coating process of an inner wall of a metal pipeline and belongs to the technical field of spray coating of paint. The spray-coating process comprises the following steps: step (1), treating an inner wall substrate; step (2), debugging spray-coating equipment; step (3), positioning a long-rod spraying gun; step (4), spray-coating the paint: stretching the long-rod spraying gun into the metal pipeline and carrying out paint spray coating on the inner wall of the metal pipeline through the long-rod spraying gun; in a spray-coating process, spray-coating a bracket by moving the long-rod spraying gun along the axial direction of the metal pipeline, and driving the long-rod spraying gun to rotate at a constant speed along an inner ring of a bearing so as to enable the long-rod spraying gun to move along a cylindrical spiral line track; and step (4) firing a coating. By adopting the spray-coating process disclosed by the invention, a target of uniformly spray-coating the inner wall of the metal pipeline with a large pipe diameter in one step is mainly realized and the quality of the fired coating on the inner wall of the metal pipeline is improved.

Description

[0001] The patent application of the present invention is a divisional application with the application number: 2015104478017. The filing date of the original application is: 2015-07-24. The name of the invention is: a long-stem spray gun spraying bracket. technical field [0002] The invention relates to the technical field of paint spraying, in particular to a metal pipe inner wall spraying process. Background technique [0003] Metal pipes are tools for conveying liquids or gases, and are widely used in various fields of the national economy. During the use of metal pipes, the inner wall of the metal pipe will inevitably have problems such as scaling and corrosion, which will affect the transportation of working fluid in the metal pipe and reduce the service life of the pipe. Therefore, the protection of the inner wall of the metal pipe is particularly important. At present, for the protection of the inner wall of the metal pipeline, the usual method is to coat the inner ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B15/06B05B13/06B05D7/22B05D3/02
CPCB05B13/0636B05B15/62B05D3/0272B05D7/222B05D2254/04
Inventor 包向军陈光李杰陈涛严大炜闫丹
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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