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Concrete conveying cylinder and manufacturing process thereof

A manufacturing process and delivery cylinder technology, which is applied to components of pumping devices for elastic fluids, variable displacement pump components, machines/engines, etc., can solve the problem of large wear of chrome plating layer, low hardness, and consumption rate of concrete delivery cylinders Advanced problems, to achieve the effect of low cost and improved wear life

Inactive Publication Date: 2013-07-24
WUXI SHUANGYU HYDRAULIC MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The base body of the concrete delivery cylinder is 45# steel. The hardness of 45# steel is low, relatively soft, and not wear-resistant. It is mainly used for concrete pumps. Therefore, the existing concrete delivery cylinder has a thickness of 0.2mm~0.3mm on the inner wall of the cylinder. mm chrome-plated layer, but during the conveying process of concrete, the chrome-plated layer on the inner wall of the cylinder body is greatly worn, and the cylinder body is also easily strained. The wear-resistant service life that the chrome-plated layer can maintain is about 50,000 square meters , the consumption rate of the concrete conveying cylinder is high, resulting in the high cost of the concrete pump for conveying concrete

Method used

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  • Concrete conveying cylinder and manufacturing process thereof

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Experimental program
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Effect test

specific Embodiment 1

[0033] a. Quenching and tempering the hot-rolled steel pipe of 45# steel, so that the hardness range is 200HB;

[0034] b. Boring the quenched and tempered 45# hot-rolled steel pipe to form inner holes;

[0035] c. Honing the surface of the inner hole so that the surface roughness is 0.2 μm;

[0036] d. The surface of the inner hole after honing is processed by a plasma arc surface quenching process to form a quenched layer. The thickness of the quenched layer is 0.1mm, and the surface hardness of the quenched layer is 530HV;

[0037] e. Honing the surface of the quenched layer to make the surface roughness 0.2 μm;

[0038] f. Carry out electroplating on the surface of the quenched layer after honing to produce an electroplating layer. The electroplating layer is specifically a chrome-plated layer, and the thickness of the chrome-plated layer is 0.3mm.

specific Embodiment 2

[0039] a. Quenching and tempering the hot-rolled steel pipe of 45# steel, so that the hardness range is 270HB;

[0040] b. Boring the quenched and tempered 45# hot-rolled steel pipe to form inner holes;

[0041] c. Honing the surface of the inner hole so that the surface roughness is 0.1 μm;

[0042] d. The surface of the inner hole after honing is processed by a plasma arc surface quenching process to form a quenched layer. The thickness of the quenched layer is 0.3mm, and the surface hardness of the quenched layer is 667.5HV;

[0043] e. Honing the surface of the quenched layer to make the surface roughness 0.1 μm;

[0044] f. Carry out electroplating on the surface of the quenched layer after honing to produce an electroplating layer. The electroplating layer is specifically a chrome-plated layer, and the thickness of the chrome-plated layer is 0.2 mm.

specific Embodiment 3

[0045] a. The hot-rolled steel pipe of 45# steel is subjected to quenching and tempering treatment, so that the hardness range is 235HB;

[0046] b. Boring the quenched and tempered 45# hot-rolled steel pipe to form inner holes;

[0047] c. Honing the surface of the inner hole so that the surface roughness is 0.15 μm;

[0048] d. The surface of the inner hole after honing is processed by a plasma arc surface quenching process to form a quenched layer. The thickness of the quenched layer is 0.8mm, and the surface hardness of the quenched layer is 700HV;

[0049] e. Honing the surface of the quenched layer so that the surface roughness is 0.15 μm;

[0050] f. Carry out electroplating on the surface of the quenched layer after honing to produce an electroplating layer. The electroplating layer is specifically a chrome-plated layer, and the thickness of the chrome-plated layer is 0.25 mm.

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Abstract

The invention provides a concrete conveying cylinder which prolongs wear-resisting service life of the inner wall of a cylinder body, and enables the cost for a concrete pump to convey concrete to be low. The concrete conveying cylinder comprises a cylinder base body and a chromium coating which is located on one side of the inner wall of the cylinder base body. The concrete conveying cylinder is characterized in that a hardened layer is arranged on the inner wall of the cylinder base body and is located between the inner wall of the cylinder base body and the chromium coating. The chromium coating, the hardened layer and the cylinder base body are tightly combined from interior to exterior to form an integral structure.

Description

technical field [0001] The invention relates to the technical field of concrete delivery structures, in particular to concrete delivery cylinders. The invention also provides a manufacturing process for the concrete delivery cylinders. Background technique [0002] The base body of the concrete delivery cylinder is 45# steel. The hardness of 45# steel is low, relatively soft, and not wear-resistant. It is mainly used for concrete pumps. Therefore, the existing concrete delivery cylinder has a thickness of 0.2mm~0.3mm on the inner wall of the cylinder. mm chrome-plated layer, but during the conveying process of concrete, the chrome-plated layer on the inner wall of the cylinder body is greatly worn, and the cylinder body is also easily strained. The wear-resistant service life that the chrome-plated layer can maintain is about 50,000 square meters , The consumption rate of the concrete delivery cylinder is high, resulting in the high cost of the concrete pump to deliver c...

Claims

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Application Information

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IPC IPC(8): F04B53/16
Inventor 黄晓波
Owner WUXI SHUANGYU HYDRAULIC MACHINERY
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