CN2750151Y

CN2750151Y - Abrasion-proof multiple tube with bimetal layer

Info

Publication number: CN2750151Y
Application number: CN 200420013319
Authority: CN
Inventors: 吕文祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-27
Filing date: 2004-12-27
Publication date: 2006-01-04
Anticipated expiration: 2014-12-27

Abstract

The utility model relates to an abrasion-proof composite pipeline with a bimetal layer, particularly a pipeline used for powder transmission and deslagging in heat power plants, cement industry, mine industry, etc. The utility model has the technical scheme that the abrasion-proof composite pipeline is composed of a pipeline outer layer (1) and a pipeline inner layer (2), wherein the pipeline outer layer (1) is a protective layer and uses straight carbon steel material; the pipeline inner layer (2) is an abrasion-proof layer and uses abrasion-proof and heat-resistant alloy material; the pipeline outer layer (1) and the pipeline inner layer (2) are tightly connected together by casting. The expansion coefficient of the inner layer and the outer layer of the utility model correspond; the abrasion-proof composite pipeline has favorable thermal-shock resistance; the service life of the abrasion-proof composite pipeline is increased by 2-5 times as compared with the background art (the service life is increased by 12 times as compared with that of a 16Mn concrete conveying bent pipe); the manufacturing cost of the abrasion-proof composite pipeline is saved by one third as compared with that of a monometallic pipeline. The utility model has the characteristics of reasonable structure, improved performance, long service life, reduced manufacturing cost, etc.; the utility model is convenient in use, installation and maintenance and can be widely used for deslagging, ash removal and powdery material conveyance in heat power plants, cement industry, mine industry, etc.

Description

The double-metal layer abrasion resistant composite pipeline

Affiliated technical field:

The utility model relates to a kind of double-metal layer abrasion resistant composite pipeline, particularly is applied to the pipeline of the defeated powder deslagging of industries such as thermoelectricity plant, cement, mine.

Background technique:

The employed defeated powder Residue extraction pipelines of industry such as domestic and international thermoelectricity plant, cement, mine are after experience is used pottery, monometallic pipeline (rare earth Wear Resisting Steel, superhardness cast iron tube), since widely-used various multiple tubes of the middle and later periods nineties.Earthenware duct is used widely in one period because of higher hardness and corrosion resistance are arranged itself, and still, because technological reason, earthenware duct thickness is bigger, is subjected to bigger restriction on using; Because pottery is more crisp, easily fracture not only makes transportation and difficulty is installed again, and easily produces embrittlement even come off under the bigger situation of impact force, now is eliminated gradually.Monometallic pipeline (as the rare earth abrasion-proof pipe) is difficult to solve hardness and this contradiction of weldability of steel.In production application,, have to sacrifice its hardness, both made when the hardness of the HRC35 left and right sides weldability still very poor for guaranteeing the weldability of steel, easy to crack in the welding process.Can't improving of conduit hardness had a greatly reduced quality its impact resistance to pulverized coal conveying, lime-ash, and smelting, manufacturing process are complicated in addition, and cost is higher, is eliminated at last.Steel-Ceramic Composite pipeline has higher wear resistance because of the inner ceramic layer, and weight is lighter, and manufacturing process more simply and once is widely used.But, because ceramic layer is more crisp, steel is inconsistent with the thermal expansion coefficient of pottery, the binding ability of the two relatively a little less than, under the situation that transfer rate is higher and the material diameter is bigger, its ceramic layer especially ceramic layer of bend comes off easily, causes multiple tube early failue, therefore, be difficult to the effect that reaches satisfied in actual applications.In sum, there is the compound difficulty of bend pipe in the pipeline of background technique, and the easy embrittlement of composite material easily comes off, and the life-span is short, transportation maintenance inconvenience, or welding difficulty, and hardness is not enough, the cost problem of higher.

The model utility content:

The utility model purpose provides a kind of double-metal layer abrasion resistant composite pipeline, improves performance, life-saving, reduction cost, and conveniently uses, installs, overhauls, and solves the problems referred to above that exist in the background technique.

The technical solution of the utility model is: the double-metal layer abrasion resistant composite pipeline is made up of pipeline outer-layer and pipeline internal layer; pipeline outer-layer is a protective layer; adopt the straight carbon steel material; the pipeline internal layer is a wearing layer; adopt the antiwear heat resisting alloy material, pipeline outer-layer and pipeline internal layer are closely linked by casting.

For the ease of the connection between the pipeline, the end of pipeline is provided with the metal tube that is complementary with internal diameter of the pipeline and the outer sleeve pipe of strengthening, and forms steppedly, and metal tube and outer reinforcement sleeve pipe and tube wall are fixed together.

Pipeline (for example elbow, bend pipe etc.) for bending, the bending radius of pipeline one side is greater than the bending radius of opposite side, because the inner layer tube wall of the bigger side of the direct impact bending radius of ducted transported substance, for improving the shock-resistant ability of the bigger side wearing layer of pipe bending radius, increase the service life, the thickness of the bigger side of pipeline internal layer bending radius is greater than the thickness of the less side of bending radius.

Adopt the utility model, pipeline adopts composite casting compound, the internal and external layer expansion coefficient is suitable, has good thermal shock resistance, in the temperature rapid change with change under the frequent environment and use, solved steel Ceramic Composite pipeline thereby internal and external layer expansion, shrink inconsistent cause managing in cracked the peeling off of ceramic layer and the early failue problem takes place.The body skin is a common steel tube, and cost is low; The pipeline internal layer adopts superhardness high-chromium wear-resistant heat-resisting allay material, wear-resisting, the corrosion resistance characteristic that had both possessed high alloy iron, good mechanical property and higher shock resistance are arranged again, when pipe-line system takes place by local the obstruction, can arbitrarily knock, beat, cut and unload and change, thereby make installation, use, maintenance conveniently.Can improve 2-5 doubly (comparable 16Mn transmission and concrete transmission bend pipe improve life-span 12 times) than background technique working life, and cost saves 1/3rd than the monometallic pipeline.

The utlity model has rational in infrastructure, improve characteristics such as performance, life-saving, reduction cost, and conveniently use, install, maintenance, can be widely used in industry deslagging ash disposal such as thermoelectricity plant, cement, mine and carry powder.

Description of drawings:

Fig. 1 is the utility model example structure schematic representation.

Fig. 2 is an A position structure for amplifying schematic representation among the utility model embodiment.

Among the figure: pipeline outer-layer 1, pipeline internal layer 2, metal tube 3, pipeline internal layer bending radius major lateral wall 4, the less sidewall 5 of pipeline internal layer bending radius, strengthen sleeve pipe 6 outward.

Embodiment:

Below in conjunction with accompanying drawing, the utility model is described in further detail by embodiment.

Present embodiment is a channel bend; the double-metal layer abrasion resistant composite pipeline is made up of pipeline outer-layer 1 and pipeline internal layer 2; pipeline outer-layer 1 is a protective layer; adopt the straight carbon steel material; pipeline internal layer 2 is a wearing layer; adopt superhardness high-chromium wear-resistant heat-resisting allay material, pipeline outer-layer and pipeline internal layer are closely linked by casting.For the ease of being connected between channel bend and the pipeline, the end of channel bend is provided with metal tube 3 and the outer sleeve pipe 6 of strengthening that is complementary with internal diameter of the pipeline, forms stepped, metal tube 3 and outer strengthen in sleeve pipe 6 and the pipeline once 2 and pipeline outer-layer 1 be fixed together.The bending radius of channel bend one side is greater than the bending radius of opposite side, because the inner layer tube wall of the bigger side of the direct impact bending radius of ducted transported substance, for improving the shock-resistant ability of the bigger side wearing layer of pipe bending radius, increase the service life, the thickness of pipeline internal layer bending radius major lateral wall 4 is greater than the thickness of the less sidewall 5 of pipeline internal layer bending radius.After the utility model generally adopts the ladder of socket between the pipeline, pipe end to cooperatively interact, more directly the welding method, simple installation.

Claims

1, a kind of double-metal layer abrasion resistant composite pipeline; it is characterized in that forming by pipeline outer-layer (1) and pipeline internal layer (2); pipeline outer-layer (1) is a protective layer; adopt the straight carbon steel material; pipeline internal layer (2) is a wearing layer; adopt the antiwear heat resisting alloy material, pipeline outer-layer (1) and pipeline internal layer (2) are closely linked by casting.

2, the double-metal layer abrasion resistant composite pipeline according to claim 1, the end that it is characterized in that pipeline is provided with metal tube (3) and the outer sleeve pipe (6) of strengthening that is complementary with internal diameter of the pipeline, form steppedly, metal tube (3) and the outer sleeve pipe (6) of strengthening are fixed together with pipeline internal layer (2), pipeline outer-layer (1).

3,, it is characterized in that the thickness of the thickness of pipeline internal layer (2) bending radius major lateral wall (4) greater than the less sidewall of pipeline internal layer bending radius (5) according to claim 1 or 2 described double-metal layer abrasion resistant composite pipelines.