Method suitable for coating large-diameter metal pipe by molding powder to manufacture composite pipe

A technology for metal pipes and composite pipes, which is applied to the device for coating liquid on the surface, coating, etc., which can solve the problems of inability to meet the coating requirements of large-diameter metal pipes, large material waste, and low production efficiency, and meet the requirements of coating The effect of covering demand, low energy consumption and high production efficiency

Inactive Publication Date: 2015-01-07
JILING YULINGLONG STEEL PIPE STEEL STRUCTURE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the metal pipes in the prior art, steel pipes and cast iron pipes are usually coated with an anti-corrosion layer, but this is limited to metal pipes with a diameter smaller than φ3000. Poor, uneven coating, rough surface, and material waste, high cost, complex process, low production efficiency, unable to meet the coating needs of large-diameter metal pipes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: Coating the metal pipe of φ500, the steps are as follows:

[0018] 1) shot blasting

[0019] Using shot blasting equipment, the pipeline rotates at a speed of 10n / min during the shot blasting process, and at the same time, the shot blasting speed is 1.2m / min for shot blasting to achieve a 2.5 level of rust removal. The shot blasting is steel wire cut shot and cast steel shot The mixed shot after mixing in the ratio of 3:1, the Rockwell hardness of steel cut shot is 35-52, the Rockwell hardness of cast steel shot is 40-50, and the diameter is φ1.0;

[0020] 2) Degrease

[0021] Use a degreasing agent to degrease by hitting with a high-pressure water gun, and the pressure of the high-pressure water gun is 1MPa;

[0022] 3) dry

[0023] The degreased metal tube is placed in an environment of 180°C for drying, and the drying time is 40 minutes;

[0024] 4) Coating

[0025] The plastic powder is evenly coated on the metal pipe through the paint shaking ...

Embodiment 2

[0028] Embodiment 2: Coating the metal pipe of φ600, the steps are as follows:

[0029] 1) shot blasting

[0030] Using shot blasting equipment, the pipeline rotates at a speed of 15n / min during the shot blasting process, and at the same time, the shot blasting speed is 1.2m / min for shot blasting to achieve a 2.5 level of rust removal. The shot blasting is steel wire cut shot and cast steel shot according to The mixed shot after mixing in the ratio of 3:1, the Rockwell hardness of steel cut shot is 35~52, the Rockwell hardness of cast steel shot is 40~50, and the diameter is φ1.0~1.2;

[0031] 2) Degrease

[0032] Use a degreasing agent to degrease by hitting with a high-pressure water gun, and the pressure of the high-pressure water gun is 1MPa;

[0033] 3) dry

[0034] The degreased metal tube is placed in an environment of 200 ℃ for drying, and the drying time is 30 minutes;

[0035] 4) Coating

[0036] The plastic powder is evenly coated on the metal pipe through t...

Embodiment 3

[0039] Embodiment 3: Coating the metal pipe of φ600, the steps are as follows:

[0040] 1) shot blasting

[0041] Using shot blasting equipment, the pipeline rotates at a speed of 12n / min during the shot blasting process, and at the same time, the shot blasting speed is 1.2m / min for shot blasting to achieve a 2.5 level of rust removal. The shot blasting is steel wire cut shot and cast steel shot The mixed shot after mixing in the ratio of 3:1, the Rockwell hardness of steel cut shot is 35-52, the Rockwell hardness of cast steel shot is 40-50, and the diameter is φ1.0;

[0042] 2) Degrease

[0043] Use a degreasing agent to degrease by hitting with a high-pressure water gun, and the pressure of the high-pressure water gun is 1MPa;

[0044] 3) dry

[0045] The degreased metal tube is placed in an environment of 190 ℃ for drying, and the drying time is 36 minutes;

[0046] 4) Coating

[0047] The plastic powder is evenly coated on the metal pipe through the paint shaker s...

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Abstract

The invention relates to a method suitable for coating a large-diameter metal pipe by molding powder to manufacture a composite pipe. The method is characterized by comprising the following steps: (1) rotating the pipeline at a certain speed in the shot blasting process, and performing shot blasting at set speed; (2) degreasing the metal pipe in a striking way by adopting a high-pressure water gun and by virtue of a degreasing agent; (3) drying the degreased metal pipe in a high-temperature environment; (4) uniformly spraying the molding powder onto the metal pipe through a paint shaking sieve, and driving the metal pipe to rotate at a given constant speed by a metal pipe carrier cart; and (5) solidifying the molding powder on the metal pipe under a high temperature condition in a large-sized kiln-type heating device, driving the metal pipe with the plastic coating to rotate at a constant speed in the large-sized kiln-type heating device by the carrier cart, and thus preparing a finished product composite pipe. The method has advantages of large binding force, large attaching force, uniformity in coating and smoothness and attractiveness of surface, and the coating requirement of the large-diameter metal pipe can be met.

Description

technical field [0001] The invention relates to a pipe surface treatment process, which is a method suitable for large-diameter metal pipes coated with plastic powder to manufacture composite pipes. Background technique [0002] Pipeline transportation is a long-distance transport method of transporting liquid and gas materials using pipelines as a means of transportation. Transportation has the advantages of less energy consumption, low cost and good benefits. The metal pipe is the main component of the pipeline. According to the material, there are several types of metal pipes, such as steel pipes, cast iron pipes, reinforced concrete pipes, and non-metallic pipes. The connection methods include socket connections, flange connections, welding, and bonding. It is a convenient, fast, safe and efficient connection method in the connection of metal pipes. In the metal pipes of the prior art, the socket connection is only applied to cast iron pipes and reinforced concrete pipe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05C1/04B05C11/10B23P15/00
Inventor 刘长生费敏建李捷许兴林
Owner JILING YULINGLONG STEEL PIPE STEEL STRUCTURE MFG
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