CN101781418A - Protecting jacket of steel strand stay cable - Google Patents
Protecting jacket of steel strand stay cable Download PDFInfo
- Publication number
- CN101781418A CN101781418A CN200910021041A CN200910021041A CN101781418A CN 101781418 A CN101781418 A CN 101781418A CN 200910021041 A CN200910021041 A CN 200910021041A CN 200910021041 A CN200910021041 A CN 200910021041A CN 101781418 A CN101781418 A CN 101781418A
- Authority
- CN
- China
- Prior art keywords
- protecting jacket
- stay cable
- steel strand
- hdpe
- strand stay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a protecting jacket of a stay cable which is applied in a steel strand stay cable anchoring system and has the advantages of beautiful color, high strength and toughness, corrosion resistance, no deformation, leakage prevention and ageing resistance. The protecting jacket comprises an HDPE special material, nano graphite powder, rubber powder, plastid, flame retardant, antistatic agent and absorbent. The protecting jacket is prepared by the following steps: taking raw materials, processing aids and a modifier, metering, pelleting by a double pelletizer, extruding by a double screw, reshaping by a nose, passing a double-wall corrugated pipe node and an extrusion die, extruding by vacuumizing, corrugation forming, cooling by water, drawing, automatically metering, and automatically cutting to obtain the product. The invention has simple preparation technology and convenient operation, and is suitable for industrialized production.
Description
Technical field
The present invention relates to a kind of steel strand stay cable anchoring system protecting jacket of steel strand stay cable; The invention still further relates to the preparation method of this protecting jacket of steel strand stay cable simultaneously.
Background technology
Guy of twisted steel cable is a kind of novel drag-line that adopts the self-anchoring system sheet clamping type group anchor, is adopted first by France's (main span is 143.5m+320m+143.5m) when building the Bo Luodongna bridge in 1978 abroad, uses existing 30 years so far.But in nearly 20 years, guy of twisted steel cable has obtained using widely in American-European, Japan and other countries.Application in China is less than 10 years, is the earliest to use on the bridge of the river, Liuyang in Hunan.Because of its strength of materials height (the big 1860MPa of tensile strength) but, the installation of drag-line and simple, whole drag-line share split transportation of tensioning process, the tensioner tonnage is little, do not need large-scale system rope workshop, needn't be equipped with obviously advantage and being used widely gradually in the cable-stayed bridge construction at home and abroad such as large-scale drag-line erecting equipment.
Although what adopt at present is based on the anticorrosion anticorrosion form of suspension cable of batch production hot extrude high density polyethylene(HDPE) (HDPE), compared the variation that essence has been arranged with other former anticorrosion form, this protective system remains in some problems, still needs further to improve.(1) in the moulding process of hot extrude HDPE sheath, jacket thickness is easy to generate local inhomogeneous and eccentric phenomena, and because the suspension cable hauling distance is long, and sheath is in solidification process, easily causes crimp during through roller.When extrusion molding and coiling, if moulding twisting equipment is asynchronous, the production unit restriction causes the turning radius of suspension cable less, then is easy to generate the strand distortion.Therefore, need improve each flow process of strict CONTROL PROCESS, the defective of minimizing suspension cable hot extrude HDPE sheath to suspension cable moulding and extrusion technique.(2) hot extrude HDPE sheath problem of aging.The actual residing environment of bridge stay cable is very abominable, if the polyethylene performance of selecting for use does not conform to actual environment for use, the polyethylene season cracking will occur in the near future in use.So must in HDPE, introduce oxidation inhibitor simultaneously and improve its resistivity at the HDPE of suspension cable different environmental selection different performance of living in to thermal ageing.(3) water is to the influence of steel wire in the suspension cable.The suspension cable of domestic production at present, inner wire has the space, has airborne water vapour composition, in addition, the suspension cable in the use is under the condition of climate change, owing to have temperature head inside and outside the HDPE sheath, can produce " water of condensation " phenomenon, these all can cause corrosion to steel wire.Particularly in transportation, lifting and extension rope construction process, if misoperation causes certain damage to the suspension cable sheath, sheath cracking when serious if untimely processing then is easy to into water, thereby causes suspension cable the inside steel wire to corrode.
It is big that protecting jacket of steel strand stay cable provided by the invention has cost performance: because spiral technology, the cast wall is thin, and the material-saving light weight is convenient to transportation and construction.Withstand voltage: because tubing is spiral-shaped, thereby strengthened the ring stiffness, had strong rigidity, tough and tensile elasticity can be born outer load effectively around song, uses the back indeformable.Easy construction: because spiral technology makes the bending pipes scope wider, can be arbitrarily crooked, more convenient cover is scurried, and can shorten the engineering time greatly, saves executive cost.Tension, anti-breaking tenacity height, the compressive strength height.Good corrosion resistance: resistance, acid-alkali-corrosive-resisting can tolerate most of chemical mediator, no galvanic corrosion.Long service life.Wear easily: because the single wall screw pipe, frictional coefficient is low, and the contact surface knot of cable and wall pipe is 1/4 of a straight wall pipe only, thereby tractive force is reduced greatly.Put on the traction iron wire in producing moulding pipe, it is easy to intert electric wire, cable.The insulating property of optimizing: because main raw material is a high density polyethylene(HDPE), insulating property are good, can avoid the power transmission and transformation vortex phenomenon.The use temperature scope is wide: the temperature safe operation scope of broad is arranged, and the HDPE spiral tube is-30～60 ℃, and CFRP (LCPE) carbon element combined helical pipe is-30～90 ℃.Good heat dissipation effect: because the principle of spirane structure, cable is hanging shape in spiral tube, heat radiation all around, and in addition, the carbon element pipe also has ultra-violet radiation resisting, termite-proof effect.
Summary of the invention
The object of the present invention is to provide that a kind of color and luster is attractive in appearance, high strength, high tenacity, corrosion-resistant, indeformable, antiseep, anti-aging, the suspension cable protecting jacket that is applied to the steel strand stay cable anchoring system.
Another object of the present invention provides a kind of preparation method of protecting jacket of steel strand stay cable.
Purpose of the present invention can realize by following measure:
A kind of protecting jacket of steel strand stay cable is made up of HDPE PP Pipe Compound, Nano graphite powder, rubber powder, look grain, the agent of resistance burning, static inhibitor, moisture adsorbent.A kind of protecting jacket of steel strand stay cable as claimed in claim 1 is characterized in that: the preparation method of described a kind of protecting jacket of steel strand stay cable may further comprise the steps: raw material, processing aid, properties-correcting agent → metering → flat two granulation → twin screws extrude → head shaping → double-wall corrugated pipe die, extrusion die → vacuumize extrude → ripple forming → water cooling → traction → automatic gauge → automatic cutting → finished product finishes.A kind of protecting jacket of steel strand stay cable as claimed in claim 1 is characterized in that: the weight percent of each composition is in the described raw material: agent 2%, static inhibitor 2%, moisture adsorbent 4% are burnt in HDPE PP Pipe Compound 45%, Nano graphite powder 2%, rubber powder 39%, look grain 6%, resistance.A kind of protecting jacket of steel strand stay cable as claimed in claim 1 is characterized in that: the weight percent of each composition is in the described raw material: agent 2%, static inhibitor 2%, moisture adsorbent 4% are burnt in HDPE PP Pipe Compound 35%, Nano graphite powder 2%, rubber powder 49%, look grain 6%, resistance.A kind of protecting jacket of steel strand stay cable as claimed in claim 1 is characterized in that: the weight percent of each composition is in the described raw material: agent 3%, static inhibitor 3%, moisture adsorbent 4% are burnt in HDPE PP Pipe Compound 46%, Nano graphite powder 3%, rubber powder 29%, look grain 12%, resistance.A kind of protecting jacket of steel strand stay cable as claimed in claim 1 is characterized in that: the weight percent of each composition is in the described raw material: agent 3%, static inhibitor 2%, moisture adsorbent 5% are burnt in HDPE PP Pipe Compound 50%, Nano graphite powder 2%, rubber powder 32%, look grain 6%, resistance.
Preparation technology of the present invention is simple, easy to operate, is easy to suitability for industrialized production.
Embodiment
Embodiment 1: a kind of preparation technology of insulated should padding, may further comprise the steps: burn agent 2%, static inhibitor 2%, moisture adsorbent 4% with HDPE PP Pipe Compound 45%, Nano graphite powder 2%, rubber powder 39%, look grain 6%, resistance respectively, add in the twin screw extruder → metering → flat two granulation → twin screws extrude → head shaping → double-wall corrugated pipe die, extrusion die → vacuumize extrude → ripple forming → water cooling → traction → automatic gauge → automatic cutting → finished product finishes.
Embodiment 2: a kind of preparation technology of insulated should padding, may further comprise the steps: burn agent 2%, static inhibitor 2%, moisture adsorbent 4% with HDPE PP Pipe Compound 35%, Nano graphite powder 2%, rubber powder 49%, look grain 6%, resistance respectively, add in the twin screw extruder → metering → flat two granulation → twin screws extrude → head shaping → double-wall corrugated pipe die, extrusion die → vacuumize extrude → ripple forming → water cooling → traction → automatic gauge → automatic cutting → finished product finishes.
Embodiment 3: a kind of preparation technology of insulated should padding, may further comprise the steps: burn agent 3%, static inhibitor 3%, moisture adsorbent 4% with HDPE PP Pipe Compound 46%, Nano graphite powder 3%, rubber powder 29%, look grain 12%, resistance respectively, add in the twin screw extruder → metering → flat two granulation → twin screws extrude → head shaping → double-wall corrugated pipe die, extrusion die → vacuumize extrude → ripple forming → water cooling → traction → automatic gauge → automatic cutting → finished product finishes.
Embodiment 4: a kind of preparation technology of insulated should padding, may further comprise the steps: burn agent 3%, static inhibitor 2%, moisture adsorbent 5% with HDPE PP Pipe Compound 50%, Nano graphite powder 2%, rubber powder 32%, look grain 6%, resistance respectively, add in the twin screw extruder → metering → flat two granulation → twin screws extrude → head shaping → double-wall corrugated pipe die, extrusion die → vacuumize extrude → ripple forming → water cooling → traction → automatic gauge → automatic cutting → finished product finishes.
Claims (6)
1. a protecting jacket of steel strand stay cable is made up of HDPE PP Pipe Compound, Nano graphite powder, rubber powder, look grain, the agent of resistance burning, static inhibitor, moisture adsorbent.
2. a kind of protecting jacket of steel strand stay cable as claimed in claim 1 is characterized in that: the preparation method of described a kind of protecting jacket of steel strand stay cable may further comprise the steps: one flat pair of granulation-twin screw of raw material, processing aid, properties-correcting agent one metering extrudes-head shaping-double-wall corrugated pipe die, extrusion die-vacuumize extrude-ripple forming-water cooling-traction-automatic gauge-automatic cutting-finished product finishes.
3. a kind of protecting jacket of steel strand stay cable as claimed in claim 1 is characterized in that: the weight percent of each composition is in the described raw material: agent 2%, static inhibitor 2%, moisture adsorbent 4% are burnt in HDPE PP Pipe Compound 45%, Nano graphite powder 2%, rubber powder 39%, look grain 6%, resistance.
4. a kind of protecting jacket of steel strand stay cable as claimed in claim 1 is characterized in that: the weight percent of each composition is in the described raw material: agent 2%, static inhibitor 2%, moisture adsorbent 4% are burnt in HDPE PP Pipe Compound 35%, Nano graphite powder 2%, rubber powder 49%, look grain 6%, resistance.
5. a kind of protecting jacket of steel strand stay cable as claimed in claim 1 is characterized in that: the weight percent of each composition is in the described raw material: agent 3%, static inhibitor 3%, moisture adsorbent 4% are burnt in HDPE PP Pipe Compound 46%, Nano graphite powder 3%, rubber powder 29%, look grain 12%, resistance.
6. a kind of protecting jacket of steel strand stay cable as claimed in claim 1 is characterized in that: the weight percent of each composition is in the described raw material: agent 3%, static inhibitor 2%, moisture adsorbent 5% are burnt in HDPE PP Pipe Compound 50%, Nano graphite powder 2%, rubber powder 32%, look grain 6%, resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910021041A CN101781418A (en) | 2009-01-16 | 2009-01-16 | Protecting jacket of steel strand stay cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910021041A CN101781418A (en) | 2009-01-16 | 2009-01-16 | Protecting jacket of steel strand stay cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101781418A true CN101781418A (en) | 2010-07-21 |
Family
ID=42521577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910021041A Pending CN101781418A (en) | 2009-01-16 | 2009-01-16 | Protecting jacket of steel strand stay cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101781418A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102875875A (en) * | 2012-09-28 | 2013-01-16 | 中国石油天然气集团公司 | Outer-layer protecting sleeve of three-layer protecting system of marine steel-pipe pile and manufacture method of outer-layer protecting sleeve |
| CN105603874A (en) * | 2016-01-08 | 2016-05-25 | 四川大学 | Bridge cable sleeve made from composite and making method of bridge cable sleeve |
| WO2017156411A1 (en) * | 2016-03-11 | 2017-09-14 | Case Western Reserve University | Flame retardant polymer composite materials and methods of making the same |
-
2009
- 2009-01-16 CN CN200910021041A patent/CN101781418A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102875875A (en) * | 2012-09-28 | 2013-01-16 | 中国石油天然气集团公司 | Outer-layer protecting sleeve of three-layer protecting system of marine steel-pipe pile and manufacture method of outer-layer protecting sleeve |
| CN102875875B (en) * | 2012-09-28 | 2014-07-09 | 中国石油天然气集团公司 | Outer-layer protecting sleeve of three-layer protecting system of marine steel-pipe pile and manufacture method of outer-layer protecting sleeve |
| CN105603874A (en) * | 2016-01-08 | 2016-05-25 | 四川大学 | Bridge cable sleeve made from composite and making method of bridge cable sleeve |
| WO2017156411A1 (en) * | 2016-03-11 | 2017-09-14 | Case Western Reserve University | Flame retardant polymer composite materials and methods of making the same |
| US11111364B2 (en) | 2016-03-11 | 2021-09-07 | Case Western Reserve University | Flame retardant polymer composite materials and methods of making the same |
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Open date: 20100721 |