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Concrete pump truck conveying pipe and spraying device and preparation method thereof

A technology for concrete pump trucks and conveying pipelines, applied in pipeline protection, pipeline damage/wear prevention, coating, etc., can solve the problems of elbow failure, falling off, unavoidable ceramic sheet falling off, etc., and achieve excellent roughness and temperature rise. Small, quality-reducing effects

Active Publication Date: 2014-11-19
HUNAN CHUGANG SPECIAL ALLOY STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to prevent the ceramic sheets from falling off in the actual use of this elbow, and when individual ceramic sheets fall off, some ceramic sheets will fall off in a sheet shape, so that the elbow will fail quickly

Method used

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  • Concrete pump truck conveying pipe and spraying device and preparation method thereof
  • Concrete pump truck conveying pipe and spraying device and preparation method thereof
  • Concrete pump truck conveying pipe and spraying device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A concrete pump truck conveying pipeline of the present invention, comprising a pipeline body, the inner wall of the pipeline body is sprayed with a wear-resistant cermet coating, the wear-resistant cermet coating is a tungsten carbide composite ceramic coating, and the components include 86 wt% tungsten carbide , 10wt% Co and 4wt% Cr.

[0031] Such as figure 1 Shown, a kind of spraying device of the conveying pipeline of concrete pump truck of the present invention comprises manipulator 1, supersonic flame inner hole spray gun 2, machine tool chuck 3, concrete conveying straight pipe 10 and rotary drive platform 4, supersonic flame inner hole The spray gun 2 is respectively connected with the fuel bottle 7, the powder feeder 8 and the air compressor 9 through the conveying pipe; when spraying the inner wall of the concrete conveying straight pipe 10, the concrete conveying straight pipe 10 is fixed on the rotary drive platform 4 by the machine tool chuck 3, Driven by ...

Embodiment 2

[0038] A concrete pump truck conveying pipeline of the present invention, comprising a pipeline body, the inner wall of the pipeline body is sprayed with a wear-resistant cermet coating, the wear-resistant cermet coating is a tungsten carbide composite ceramic coating, and the components include tungsten carbide of 88wt% and 12 wt% Co.

[0039] Such as figure 2 Shown, a kind of spraying device of concrete pump truck conveying pipeline of the present invention comprises manipulator 1, supersonic flame inner hole spray gun 2, pipeline clamp 5, clamp support 6 and concrete conveying elbow 11, supersonic flame inner hole spray gun 2 Connect with the fuel bottle 7, the powder feeder 8 and the air compressor 9 respectively through the conveying pipe; when spraying the inner wall of the concrete conveying elbow 11, the nozzle and the concrete conveying elbow 11 maintain a relatively rotatable displacement mode, which means that the nozzle rotates and the concrete The conveying elbo...

Embodiment 3

[0046] A concrete pump truck conveying pipeline of the present invention, comprising a pipeline body, the inner wall of the pipeline body is sprayed with a wear-resistant cermet coating, the wear-resistant cermet coating is a tungsten carbide composite ceramic coating, and the components include 90wt% tungsten carbide and 10wt% Ni.

[0047] Except that the raw material powder is different, the spraying equipment and spraying process used in this example are the same as in Example 1, and the sprayed tungsten carbide composite ceramic coating is tested, and the hardness of the sprayed tungsten carbide composite ceramic coating is ≥950HV. .3. Coating strength ≥ 60Mpa, porosity ≤ 2%.

[0048] In each of the above-mentioned embodiments, the determination of the rotational speed relative to the inner wall of the concrete delivery pipeline and the determination of the moving speed of the supersonic flame inner hole spray gun along the axis are as follows:

[0049] 1) Determination o...

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Abstract

The invention discloses a concrete pump truck conveying pipe. The concrete pump truck conveying pipe comprises a pipe main body, wherein a wearable metal ceramic coating layer produced by supersonic flame through spraying is attached on the inner wall of the pipe main body; the coating layer comprises the components of tungsten carbide and a metal phase; and the metal phase is at least one of Ni, Co and Cr. The invention further discloses a spraying device for preparing the conveying pipe through spraying, wherein the spraying device comprises a manipulator, a supersonic flame inner hole spraying gun, rotary driving equipment and the pipe main body; the spraying gun is clamped by the manipulator; a spraying head of the spraying gun is aligned to the inner wall of the pipe main body, and is kept in a corresponding rotating displacement mode with the pipe main body; the pipe main body is positioned and mounted through a machine tool chuck or a pipe fixture; when the spraying is performed, firstly, the pipe main body is deoiled; then, the sand spraying roughening is performed for the inner wall of the pipe main body; and finally, the wearable metal ceramic coating layer is sprayed to the inner wall of the pipe main body under specific process conditions. The inner wall of the concrete conveying pipe can be guaranteed to have high hardness, high wear resistance and high corrosion resistance.

Description

technical field [0001] The invention relates to a concrete delivery pipeline and its preparation, in particular to a concrete pump truck delivery pipeline, a spraying device and a pipeline preparation method. Background technique [0002] Various concrete conveying pipes widely used in construction machinery will be subjected to strong friction and corrosion by high-hardness sandstone in the concrete during work, and rapid wear and corrosion will often occur. In order to slow down this rapid wear and corrosion, engineers and technicians adopt a variety of different surface protection methods for different shapes of delivery pipes. For pipes, carburizing and quenching or hard chrome plating are mainly used. The former has general wear resistance, while the latter has better wear resistance, but the coating is thinner, and chrome plating will cause serious industrial pollution. For elbows with more serious wear, in order to improve their abrasive wear resistance, some compan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/16F16L57/06C23C4/129
Inventor 洪光财
Owner HUNAN CHUGANG SPECIAL ALLOY STEEL