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Taper pipe for concrete pumping device and manufacturing method thereof

A technology for concrete pumps and conical pipes, which is applied in the direction of mechanical equipment, pipes, conveyors, etc., can solve the problems of complex and difficult-to-control surfacing welding process, large flow channel resistance, etc., and achieve raw material saving, strong hardening ability, and impact resistance strong effect

Inactive Publication Date: 2011-07-20
SANY HEAVY IND CO LTD (CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the inventor proposes a double-layer composite tapered pipe to overcome the defects of the existing surfacing tapered pipe surfacing process, which is complicated and difficult to control, and the resistance of the flow channel is large.

Method used

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  • Taper pipe for concrete pumping device and manufacturing method thereof
  • Taper pipe for concrete pumping device and manufacturing method thereof
  • Taper pipe for concrete pumping device and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the inner pipe 2 is made of medium-carbon low-alloy steel, and the outer pipe 1 is made of ordinary low-carbon steel. First, two steel pipes that meet the design requirements are drawn and compounded to obtain a double-layer composite steel pipe, and then the composite pipe is passed through a taper pipe machine Induction heating molding, to obtain the required taper, and to achieve a tight combination of the inner and outer layers of the tapered tube without gaps. The double-layer composite tapered tube has unequal wall thickness, the big end is thin and the small end is thick. Finally, the product is quenched as a whole to make the inner tube with better hardenability form martensite and bainite structure to obtain higher hardness and wear resistance, while the outer tube with weak hardenability is pearlite and ferrite Body structure, low hardness, good toughness, and strong impact resistance.

Embodiment 2

[0029] The inner tube is made of wear-resistant cast iron and wear-resistant cast steel with a thickness greater than 5mm, and cast into a cone shape; the outer tube is made of 20 steel and molded; then the inner tube is pressed into the outer tube to form a double-layer composite tapered tube. Limited by the casting process, the inner tube must be thicker than 5mm, because too thin will cause the metal liquid to condense without flowing to the bottom of the model during casting, resulting in various casting defects, and the required size of the workpiece cannot be obtained. The total thickness is 10 Between -16mm.

Embodiment 3

[0031] The outer tube is made of 20 steel and molded into a single-layer tapered tube with a thickness of 2-6mm. The obtained outer tube is placed into the cavity, and the inner tube material is cast with wear-resistant cast iron or cast steel to form a local metallurgical bond, and then quenched after compounding.

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Abstract

The invention relates to a taper pipe for a concrete pumping device. The taper pipe comprises an inner pipe and an outer pipe which are made from different metal materials, the rigidity of the inner pipe is higher than that of the outer pipe; and the toughness of the outer pipe is higher than that of the inner pipe; materials can be used for the inner pipe comprise medium and high carbon low-alloy steel, wear-resisting cast steel, wear-resisting cast iron and tool steel; and the materials of the outer pipe can be common carbon steel and low-carbon alloy steel. The invention also relates to a method for manufacturing the taper pipe. A double-layer composite taper pipe provided by the invention has the advantages that the wall thickness design of a thin large end and a thick small end conrresponds with the design principle of equal service life; the raw materials are saved; the inner pipe has high through quenching capability, smooth surface, and high rigidity and good wear resistance; the outer pipe has low rigidity, good toughness and high capability of shock resistance, and can protect the inner pipe well; and simultaneously the comprehensive requirement on the abrasion resistance and toughness of the taper pipe for the pumping device is satisfied.

Description

Technical field [0001] The invention relates to an engineering operation device, in particular to a cone pipe for concrete pumping equipment and a manufacturing method thereof. Background technique [0002] With the rapid development of concrete pumping technology, the construction efficiency is further improved, and the project cycle is shortened. People have put forward higher requirements for the life and stability of the pump truck, and the improvement of the material performance of the key parts of the equipment is particularly important. As a key component that affects the service life and stability of the pump truck, the tapered tube is currently mostly welded on the inner surface to improve wear resistance. The product of this preparation process has high energy consumption, high cost, poor quality, serious environmental pollution, and weak market competitiveness. At the same time, it is inevitable that the position and thickness of the bonding interface cannot be accurat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/02F16L9/14F16L57/06
CPCB65G53/52F16L57/06F16L9/02B65G53/32
Inventor 周水波郑泽花程苏丹
Owner SANY HEAVY IND CO LTD (CN)
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