US 11,359,758 B2 · Sectional-type high wear-resistant double-layer straight tube and a method for preparing the same

Abstract

In a sectional-type high wear-resistant double-layer straight tube and a method for preparing the same, the double-layer straight tube includes a protective outer tube and a sectional-type wear-resistant inner tube. The protective outer tube is nested outside of the sectional-type wear-resistant inner tube; the sectional-type wear-resistant inner tube includes at least two wear-resistant inner tube sections; and the wear-resistant inner tube sections are connected sequentially. The sectional-type wear-resistant inner tube at least includes a left inner tube section, a right inner tube section, and one or more middle inner tube section. The wear-resistant straight tube can greatly prolong the service life of the pipeline so that the cost performance of the pipeline is increased by more than a few times. It would also easily achieve mass production, the quality is stable and reliable, and the safety performance is high.

Claims10

Dependent claims

A sectional-type high wear-resistant double-layer straight tube for concrete transferring, wherein the two-layer straight tube comprising:

protective outer tube, sectional-type wear-resistant inner tube, the protective outer tube nested outside of the sectional-type wear-resistant inner tube, the sectional-type wear-resistant inner tube comprises at least two sections of wear-resistant inner tube, and the sections of wear-resistant inner tube are connected to each other sequentially,
wherein the sectional-type wear-resistant inner tube at least comprises a left end inner tube section, a right end inner tube section and one or more middle inner tube sections, wherein, the material of at least one of the three kinds of sections is different from that of others;
wherein, at least one of the middle inner tube sections is rolled steel tube of high carbon high chromium steel, which has been subject to heat treatment by spherical annealing at 750-800° C. and has been bent from a steel plate to a ring-shape using a bending machine,
wherein, the wear-resistant performance of at least one of the left end inner tube section and the right end inner tube section is better than that of all or part of the middle inner tube sections.

1 more element

A sectional-type high wear-resistant double-layer straight tube preparing method, wherein the wear-resistant tube is made to be a double-layer construction, including an outer protective tube and an inner wear-resistant tube, wherein the inner wear-resistant tube consists of two or more sections of wear-resistant tube connected in sequence,

wherein, the wear-resistant tube preparation method includes the following steps:
Step S1, preparing the outer protective tube;
Step S2, preparing multiple sections of the inner wear-resistant tube;
Step S3, installing the multiple sections of the inner wear-resistant tube into the outer protective tube,
wherein, the Step S2 includes:
Step S2.1, preparing or acquiring of steel plates of high carbon high chromium;
Step S2.2, heat treating the steel plates by spherical annealing, the temperature of the spherical annealing is at 750-800° C.;
Step S2.3, cutting the steel plate treated according to a predetermined size to produce a steel plate with predetermined size;
Step S2.4, bending the steel plate with predetermined size to a ring-shape using a bending machine with its long edge used as its circumference, and its short edge as the length of the tube;
Step S2.5, welding the ends of predetermined size steel plate together, as a section of the inner wear-resistant tube, repeating Steps S2.1-S2.5 and preparing multiple sections of inner wear-resistant tube.

7 more elements

Dependencies are inferred from the claim text.

Sectional-type high wear-resistant double-layer straight tube and a method for preparing the same

Life of this patent

Sectional-type high wear-resistant double-layer straight tube and a method for preparing the same

Life of this patent

Abstract

Claims10