CN1456742A

CN1456742A - External protective rigging without stress

Info

Publication number: CN1456742A
Application number: CN 02119608
Authority: CN
Inventors: 龙跃; 穆成君; 黄富强; 韦哲军; 曾宪民
Original assignee: LIUZHOU BUILDING MACHINERY GENERAL FACTORY
Current assignee: LIUZHOU BUILDING MACHINERY GENERAL FACTORY
Priority date: 2002-05-11
Filing date: 2002-05-11
Publication date: 2003-11-19
Anticipated expiration: 2022-05-11
Also published as: CN1190553C

Abstract

A high-strength cable without stress for its external protecting layer is composed of steel wire bundle as core, wrapping layer of core, internal and external high-density polyethylene (HDPE) layers, and an isolating layer between said internal and external HDPE layers. Said isolating layer is prepared from aluminium powder or foil, or high-strength polyester band, or fluoric plastics, or special anticorrosion oil, and is used to release the stress of external layer. It can elongate service life of cable by 3-5 times.

Description

External protective rigging without stress

One, technical field:

The present invention relates to a kind of cable body, particularly a kind of external protective rigging without stress.

Two, background technology:

Existing anti-corrosion high strength steel cable body (comprising the drag-line of the same type that arch bridge suspender, tie-rod and building structure are used) adopts hot extrude individual layer or double-deck high density polyethylene (HDPE) (to be called for short: HDPE) cable body is wrapped up anticorrosion, when adopting double-deck HDPE, because outer HDPE in use is in stress state is arranged, outer HDPE is easy to generate stress cracking, the cable body poor durability.

At present, generally adopt such cable body on the domestic engineering, big portion cable body produced stress cracking in 1 to 8 year to some extent, and maintenance cost is huge, and the part cable body has jeopardized the safety of engineering structure.

Three, summary of the invention:

Technical problem to be solved by this invention is: thoroughly solve outside the existing high strength steel cable cable body (comprising the drag-line of the same type that arch bridge suspender, tie-rod and building structure are used) the suffered stress of layer HDPE big, be easy to generate cracking, the problem of cable body poor durability provides that a kind of skin is unstressed, the external protective rigging without stress of cable body long service life.

Its technical scheme of dealing with problems is: interior hdpe layer (also claiming internal layer HDPE) and outside increase the separation layer that one deck is made of metal or nonmetallic materials between the hdpe layer (also claiming outer HDPE).When drag-line is worked, discharge the stress of outer HDPE by separation layer, make outer HDPE under unstress state, use, prevent the drag-line stress cracking.

Its concrete structure is: a kind of external protective rigging without stress, comprise the high-strength steel tow, the band that is wrapped, be wrapped in outer interior hdpe layer and outer hdpe layer successively, it is characterized in that: a separation layer that is made of metal or nonmetallic materials is arranged between described interior hdpe layer and the outer hdpe layer.

Described separation layer be spraying or be wrapped in aluminium powder on the hdpe layer matrix or the metalloid material of aluminium foil; Also can be to twine or high-strength polyester band or fluoroplastics or special anti-corrosion grease and so on the nonmetallic materials of coated on interior hdpe layer matrix.

Since external protective rigging without stress of the present invention interior hdpe layer (also claiming internal layer HDPE) and outside increased the separation layer that one deck is made of metal or nonmetallic materials between the hdpe layer (also claiming outer HDPE), when drag-line is worked, discharge the stress of outer HDPE by separation layer, make outer HDPE under unstress state, use, thereby prevent that the outer HDPE of cable body is subjected to stress and ftractures, can improve three to five times of cable body life-spans, improve the security of engineering and greatly reduced the maintenance cost of engineering.

Four, description of drawings:

Fig. 1: the unstressed guard cable body structure schematic diagram of layer outside the present invention.

Five: the specific embodiment:

Embodiment:

A kind of external protective rigging without stress, comprise high-strength steel tow 1, be wrapped with 2, be wrapped in outer interior hdpe layer 3 and outer hdpe layer 4 successively, a separation layer 5 that is made of metal or nonmetallic materials is arranged between described interior hdpe layer 3 and the outer hdpe layer 4.

Described separation layer 5 be spraying or be wrapped in aluminium powder on hdpe layer 3 matrixes or the metalloid material of aluminium foil; Also can be to twine or high-strength polyester band or fluoroplastics or special anti-corrosion grease and so on the nonmetallic materials of coated on interior hdpe layer 3 matrixes.

Claims

1, a kind of external protective rigging without stress, comprise high-strength steel tow (1), the band (2) that is wrapped, be wrapped in outer interior hdpe layer (3) and outer hdpe layer (4) successively, it is characterized in that: a separation layer (5) that is made of metal or nonmetallic materials is arranged between described interior hdpe layer (3) and the outer hdpe layer (4).

2, external protective rigging without stress as claimed in claim 1 is characterized in that: described separation layer (5) is spraying or is wrapped in aluminium powder on interior hdpe layer (3) matrix or the metalloid of aluminium foil.

3, external protective rigging without stress as claimed in claim 1 or 2 is characterized in that: described separation layer (5) is to twine or high-strength polyester band or fluoroplastics or special anti-corrosion grease and so on the nonmetallic materials of coated on interior hdpe layer (3) matrix.