CN203093151U - Plastic steel composite cable duct - Google Patents
Plastic steel composite cable duct Download PDFInfo
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- CN203093151U CN203093151U CN 201220744420 CN201220744420U CN203093151U CN 203093151 U CN203093151 U CN 203093151U CN 201220744420 CN201220744420 CN 201220744420 CN 201220744420 U CN201220744420 U CN 201220744420U CN 203093151 U CN203093151 U CN 203093151U
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- pipe
- composite cable
- plastic
- steel composite
- thermoplastic
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- 239000002131 composite material Substances 0.000 title claims abstract description 41
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- 239000010959 steel Substances 0.000 title claims abstract description 35
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- 238000000034 method Methods 0.000 description 11
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- 239000004615 ingredient Substances 0.000 description 9
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- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 4
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000004641 Diallyl-phthalate Substances 0.000 description 3
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- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 239000004113 Sepiolite Substances 0.000 description 2
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 2
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- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The utility model discloses a cable protection casing manufacturing technology and in particular discloses a technology for manufacturing an MFPT plastic steel composite cable duct. The MFPT plastic steel composite cable duct comprises an inner pipe and an outer pipe, wherein the inner pipe is a modified thermoplastic plastic pipe (2); the outer pipe is a thermosetting plastic pipe (1); and the inner pipe (2) and the outer pipe (1) are tightly adhered to form a whole body. The inner pipe (2) and the outer pipe (1) have a consistent shrinkage rate, the advantages of two materials, namely thermosetting plastics (such as glass fiber reinforced plastics) and thermoplastic plastics, are effectively utilized, the problems that the two materials are combustible, not heat-resistant and inconsistent in shrinkage rate and particularly are difficultly adhered together are ingeniously solved, and the heat-resistant temperature is improved to 120 DEG C, so that the cold-resistant temperature is improved to -40 DEG C, the ageing resistance is prolonged by over 15 years, and the technical scheme of the composite cable duct is an important technical progress in the field of power cable ducts.
Description
Technical field
The present invention relates to city net electric power transformation trolley line and go into the ground technical field, particularly relate to a kind of novel high-performance cable duct tube-plastic-steel composite cable conduit.
Background technology
Electrical conduit to existing use is analyzed, and that uses at present has steel pipe, coating steel pipe, plastic-coated steel, sepiolite polyvinyl pipe of cement, polyvinyl chloride (PVC) pipe, chliorinated polyvinyl chloride (CPVC) pipe, polyethylene (PE) pipe, modified polypropene (MPP) cable duct tube, a fiberglass sand inclusion cable duct tube etc.Though above cable duct tube has certain superiority, because the limitation of the material that uses, these cable duct tubes have certain drawback:
1. steel pipe has very high intensity, but the not corrosion of anti-routine now is eliminated;
2. coating steel pipe has steel pipe mechanical strength preferably, but belong to the straight welding steel pipe of seam is arranged, and there are a large amount of burrs in weld seam inner welded place, scratches cable easily when wearing cable;
3. plastic-coated steel has had improvement aspect corrosion-resistant, but is easy to generate eddy current, and the cost height, except that special location, does not generally select for use;
4. pvc pipe, corrosion resistant insulation, but bad mechanical strength, difficulty is born heavy load, and the upper limit temperature of heat tolerance is 80 ℃, thermal conductivity factor 0.17, the specification requirement that does not at all reach cable protective;
5. the CPVC pipe than pvc pipe heat resisting temperature height, reach 93 ℃, but mechanical strength is on the low side, does not still satisfy cable duct bank and goes into the required intensity in ground, if adopt the thickening design, cost improves;
6. the PE pipe, does not satisfy technical indicator by heat-resisting only 70 ℃ yet;
7. the MPP pipe is a kind of novel cable conduit of modification on the PP basis, is characterized in heat-resisting, can use at 120 ℃ long-term down, use but only satisfy under-15 ℃ of conditions, the application of incompatibility north cold area, inflammable, send dense smoke and pungent smell during burning, be applicable to easily and supply water or draining that the local adapted that incompatibility is inflammable, its tear-proof, compression strength, tensile strength, flexural strength only are 1/4th to 1/2nd of fiberglass, and the cost height, uneconomical;
8. RPM, its combination property all is higher than above-mentioned various tubing, but because inwall is difficult to bear and wears cable frictional force, can cause filoselle to twine dead cable, causes wearing the cable failure;
9. sepiolite polyvinyl pipe of cement is frangible because weight is big, contains asbestos, and not environmental protection is expressly eliminated by country.
Aspect the power cable comb, find to make somebody a mere figurehead in the ground technical field in city net electric power transformation, had the be nested together composite cable conduit of formation of thermosetting plastics (fiberglass) and thermoplastic pvc pipe; Also have thermosetting plastics (fiberglass) and pvc pipe are passed through intermediate adhesive layer, with its composite cable conduit that bonds together indirectly and form.Thermoplastic generally is low pole or non-polar material, and is almost all non-caked with any adhesive; Simultaneously, thermoplastic is again the very high material of a kind of shrinkage, has and thermosetting plastics (fiberglass) the big coefficient of expansion of comparing, can be because of the repeated deformation that expands with heat and contract with cold.After aforementioned tubes is placed a period of time, interior pipe and the layering of outer tube cracking, its diameter of inner pipe shrinks 5-30mm, and length is that its interior pipe of this multiple tube of 6 meters shortens 1-6 centimetre than outer tube on length, and under certain stress condition, pipe is deviate from from outer tube easily in it.So far still do not have a kind of can with thermosetting plastics (fiberglass) and thermoplastic be combined with each other and can satisfy the composite cable conduit of power industry specification requirement.
The inventor is by having done comprehensive analysis to this field prior art with relevant patent.Such as a kind of power cable composite material tube is arranged, its outer tube is a fiberglass in the prior art, and interior pipe is PVC.But there are following several big defectives in the prior art: the first, and the easy layering of interior pipe and outer tube, it has just overlapped one deck glass reinforced plastic pipe at the outer surface of pvc pipe, and the centre has produced the slit, causes the load power of composite conduit not concentrated, and integral body does not reach the intensity of regulation.The second, same because interior pipe and the layering of outer tube independence wearing when drawing cable, because the rubbing action of cable can be pulled out the pvc pipe of internal layer, cause wearing cable and fail.The 3rd, because the shrinkage of PVC is higher than the fiberglass outer tube far away, can cause this cable composite conduit because of the modification repeatedly of expanding with heat and contract with cold.The 4th, because the heat resisting temperature of PVC is 80 ℃, and the temperature of power cable operation is greater than 90 ℃, and this tubing does not meet " power cable microcatheter technology condition " (DL/T802.3-2007) heat resisting temperature of defined, so can not be used as the power cable conduit.The 5th, hear resistance, thermal conductivity are relatively poor, and easily broken.Common thermosetting plastics (fiberglass) runs into high temperature or naked light can burn, and the poisonous dense smoke of emerging, and gives out pungent smell.
In view of the significant deficiency of above-mentioned prior art, the easiest solution route of expecting is by certain binding agent pipe in pipe or the thermoplastic in thermosetting plastics (fiberglass) outer tube and the PVC to be bonded together, and forms an integral body.But, because PVC is a kind of of thermoplastic, its shrinkage is very high in addition, thereby its surface is difficult to and thermosetting plastics (fiberglass) bonding, even under the help of special adhesive, can temporarily bond together, but also can split again afterwards through expanding with heat and contract with cold of stressed or a period of time.To this, though there is a kind of binding agent in prior art, such as, outside a kind of fiberglass and modified polypropene composite cable pipe utility model patent are described, so far do not find the binding agent that both effectively can be bonded together on the market as yet, more do not have indehiscent composite cable conduit.As for this utility model patent of CN201527863 U, because being all between the thermoplastic, its internal layer and skin bond, so do being easy to, if but thermosetting plastics and thermoplastic are bonded together but very difficulty.
Summary of the invention
Aim of the present invention overcomes the defective that composite cable conduit of the prior art exists in a difficult problem that solves electric power comb technical field, and a kind of plastic-steel composite cable conduit of superior performance is provided.The application's technical scheme is:
A kind of plastic-steel composite cable conduit, pipe and outer tube in comprising, interior pipe is the modified thermoplastic pipe, and outer tube is the thermosetting plastics pipe, and interior pipe and outer tube be not by medium but directly be bonded to an integral body.
Pipe is preferably the modified thermoplastic pipe that outer surface is handled through hacking in above-mentioned.
Pipe is preferably outer surface forms groove through spiral groove modified thermoplastic pipe in perhaps above-mentioned.
Pipe is preferably the modified thermoplastic pipe of outer surface through Low Temperature Plasma Treating in perhaps above-mentioned.
Above-mentioned outer tube is made up of the glass fibre of dipping modified resin glue, and the outer surface of pipe in described glass fibre becomes entangled in, described outer tube are fixed with interior pipe through heating and be bonded to an integral body.
A kind of manufacture method of plastic-steel composite cable conduit may further comprise the steps:
The first step, putting into the double helix machine with auxiliary material and carry out copolymerization major ingredient PP and/or PVC and/or PE and/or CPVC particle, make the modified thermoplastic masterbatch, in the thermoplastic masterbatch, add glass fibre then and other are material modified, put into Bitruder and extrude the modified thermoplastic particle, make the modified thermoplastic particle;
Second step, adopt the modified thermoplastic particle to make the modified thermoplastic pipe, its outer surface is carried out Low Temperature Plasma Treating; Or its appearance carried out hacking; Or carry out spiral groove and form helical groove; Or earlier its appearance is carried out hacking or carry out spiral groove forming helical groove, then its outer surface is carried out Low Temperature Plasma Treating;
In the 3rd step, the modified thermoplastic pipe of handling through outer surface as interior pipe, is twined at the outer surface of interior pipe with glass fiber impregnated modified resin glue then, to form the outer tube that directly is bonded to an integral body with interior pipe;
The 4th step, heating cure, after move back mould, plastic-steel composite cable conduit is made in finishing.
Auxiliary material be diallyl phthalate and/or cumyl peroxide and or vinyl front three silicyl oxide and or dicyclopentadiene and/or 1,4-is butylene.
Other material modified silane coupler, talcum powder, aluminium hydroxide or magnesium hydroxides of comprising.
Also can add aluminium hydroxide or magnesium hydroxide, silane coupler, talcum powder composition in the modified resin glue.
It heat-resistingly reaches 120 ℃ the present invention, cold-resistantly is-40 ℃, and technical indicator meets or exceeds the technical standard of DL/T802.3-2007.
Description of drawings
Fig. 1 does not have the cross section schematic diagram of the interior pipe of helical groove for the present invention;
Fig. 2 is inner tube outer surface hacking treatment effect figure;
In when Fig. 3 does not have helical groove for the present invention pipe after plasma treatment the cross section schematic diagram;
Vertical section schematic diagram when Fig. 4 adopts the plastic-steel composite cable conduit that the interior pipe of no helical groove makes for the present invention;
Fig. 5 does not have the vertical section schematic diagram of the interior pipe of helical groove for the present invention;
Fig. 6 is the vertical section schematic diagram after pipe process fluting apparatus is processed in the present invention;
Fig. 7 for pipe in the present invention after through fluting apparatus processing the vertical section schematic diagram, among the figure 4 refer in the active function groups that generates through plasma treatment of pipe;
Vertical section schematic diagram when Fig. 8 adopts the plastic-steel composite cable conduit that the interior pipe of helical groove makes for the present invention
1 is outer tube, and 2 is interior pipe, and 3 is helical groove, and 4 is the active function groups that interior pipe generates after low-temperature plasma is handled.
The specific embodiment
One, the inner tube contraction is big, intensity is low, the difficult and bonding problem of other materials in order to overcome, so thermoplastic is carried out modification, can be by following four kinds any interior pipes of making of filling a prescription, every kind of prescription umber is all mass parts.It is 20 ℃-90 ℃ that this area low temperature refers to plasma processing exit temperature.
A, its method and fill a prescription as follows:
A1, be the modification of major ingredient with the PVC thermoplastic
(1) chemical modification
Prescription:
1. PVC is 100 parts;
2. PP 10-30 part;
3. CPVC 10-40 part;
4. diallyl phthalate 0.5-2 part;
5. cumyl peroxide 3-5 part;
6. vinyl front three silicyl oxide 1-3 part.
Manufacture craft: fully stir down at 30-40 ℃, putting into the double helix machine carries out copolymerization, produces masterbatch.
(2) physical modification
Prescription:
1. masterbatch is 100 parts;
2. glass fibre 10-40 part;
3. silane coupler 0.5-1.5 part;
4. talcum powder 10-20 part;
5. aluminium hydroxide or magnesium hydroxide 20-40 part;
6. calcium carbonate 70-150 part.
Manufacture craft: after stirring, put into the lengthening Bitruder and extrude the modified thermoplastic particle.
A2, be that major ingredient carries out modification with the PP thermoplastic
(1) chemical modification
Prescription:
1. PP70-90 part;
2. PVC30-10 part;
3. diallyl phthalate 0.5-2 part;
4. cumyl peroxide 3-4 part;
5. vinyl front three silicyl oxide 0.8-3 part.
Manufacture craft: fully stir down at 30-40 ℃, putting into the double helix machine carries out copolymerization, produces masterbatch.
(2) physical modification
Prescription:
1. 100 parts of above-mentioned masterbatch;
2. glass fibre 10-40 part;
3. talcum powder 5-10 part;
4. aluminium hydroxide or magnesium hydroxide 20-40 part;
5. calcium carbonate 30-50 part.
Manufacture craft: after stirring, put into the lengthening Bitruder and extrude the modified thermoplastic particle.
A3, be the improvement of major ingredient with the PE thermoplastic
(1) chemical modification
Prescription: 1. PE100 part
2. PP10-30 part
3. CPVC 5-15 part
4. dicyclopentadiene 2-8 part
5. 1,4-is butylene 1-6 part
6. silane coupler 0.5-1.5 part.
Manufacture craft: under 30-40 ℃ temperature, fully stir, put into the double helix machine and carry out copolymerization, produce masterbatch.
(2) physical modification
Prescription: 100 parts of 1. above-mentioned masterbatch
2. glass fibre 10-30 part
3. aluminium hydroxide 20-30 part
4. polyolefin packing material 30-40 part
5. silane coupler 0.5-1.5 part.
Manufacture craft: after stirring, put into the lengthening Bitruder and extrude the modified thermoplastic particle.
A4, be the modification of major ingredient with the CPVC thermoplastic
(1) chemical modification
Prescription: 1. CPVC is 100 parts
2. PP 10-30 part
3. cumyl peroxide 2-10 part
4. chlorinated polypropylene (CPP) 5-12 part
5. silane coupler 0.2-1.2 part.
Manufacture craft: under 30-40 ℃ temperature, fully stir, put into the double helix machine and carry out copolymerization, produce masterbatch.
(2) physical modification
Prescription: 1. masterbatch is 100 parts
2. glass fibre 10-30 part
3. aluminium hydroxide 15-35 part
4. polyolefin packing material 30-80 part
5. silane coupler 0.5-1.5 part;
Manufacture craft: after stirring, put into the lengthening Bitruder and extrude the modified thermoplastic particle.
B. to the modification of thermosetting plastics glue, thermosetting plastics is carried out modification from aspects such as shrinkage, anti-flammability, toughness, ageing resistance, weatherability, hot strength, flexural strengths.It is as follows to fill a prescription:
Prescription:
100 parts of resins;
Aluminium hydroxide or magnesium hydroxide 10-50 part;
Talcum powder 5-10 part;
Calcium carbonate 5-10 part;
Silane coupler 0.5-1.5 part.
Manufacture craft is: stir repeatedly under homogenizer, make weather-proof, fire-retardant, aging-resistant modified resin glue.
C. make MFPT plastic-steel composite cable conduit
C1. with the modified thermoplastic particle by common extruding machine in addition the expressing technique of known technology extrude the modified thermoplastic conduit of required pipe thickness, thickness is advisable with 2mm-10mm, cable frictional force is incessantly worn in too thin resistance, the too thick shop layer design that can influence outer tube, and be unfavorable for the heat radiation of cable, reduce mechanical strength, influenced the service life of tubing and cable.Can utilize the plastic tube of extruding (Fig. 1) after the surface low-temperature plasma treatment (Fig. 2) to carry out outer tube twines, also can when extruding the modified thermoplastic conduit, carry out hacking or adopt special-purpose grooving equipment to carry out spiral groove forming helical groove (Fig. 5), groove width is not less than 2mm, groove depth is not less than 0.5mm, its objective is glass fibre is twined in the groove, play anti-skidding, prevent the ectonexine lamination, overcome the disadvantage of inner and outer pipes slippage effectively.Also not grooving of hacking is not directly twined, but poor-performing.
Modified thermoplastic pipe to spiral groove carries out Low Temperature Plasma Treating then, make its outer surface reflect functional groups such as a large amount of hydroxyls, carboxyl, carbonyl, need not apply any binding agent can and thermosetting plastics (fiberglass) layer cement, thereby the purpose that has realized saving cost.
Two, the making of outer tube
Through the thermoplastic pipes of modification, according to corresponding size being fixed to above the mould tightly, adopt glass fiber impregnated modified resin glue to be wound into design thickness continuously, through heating cure, move back mould, finishing just can obtain plastic-steel composite cable catheter product.
The quality verification method of plastic-steel composite cable conduit is:
1, plastic-steel composite cable conduit is cut, slit, layering and bonding uneven phenomenon should not appear in the disconnected cross section of structure sheaf.
2, the pipe ring that plastic-steel composite cable conduit is cut into 100mm is put into 120 ± 2 ℃ of baking ovens and was cured 2 hours, from baking oven, take out pipe ring then and make body naturally cool to room temperature (23 ± 2 ℃), perhaps, the pipe ring that MFPT plastic-steel composite cable conduit is cut into 50mm is put into boiled water and was boiled 2 hours, from hot water, take out pipe ring then and make body naturally cool to room temperature (23 ± 2 ℃) and placed 48 hours, no matter which kind of method of inspection crack, layering, modification, foaming phenomenon all do not occur between interior pipe (2) and the outer tube (1).
3, performance indications such as following table should meet the regulation of table 1.
Table 1 technical performance
Detection method is as follows:
(1) hot strength
Specimen preparation: because frp layer intensity is higher, intensity is mainly frp layer and provides, so what measure is the intensity of frp layer, sample cuts ring specimen on conduit, specimen width is got (8～15) mm, with suitable cutter internal layer is cutd open simultaneously, the sample both ends of the surface are level and smooth, surperficial zero defect, cut.Press the separator disk method of GB/T1458 regulation and measure, but the internal diameter of the size of separator disk and conduit matches.
(2) bending strength
Bending strength is pressed the test of GB/T1449 regulation, but sample cuts open internal layer (MPP) with suitable cutter.
(3) hardness Barcol
Press the regulation test of GB/T3854, test and be the measuring tube outer surface.
(4) joint sealing
The socket that the socket of a conduit is put two " O " RunddichtringOs and another root conduit connects, and keeps 15min under 0.1Mpa hydraulic pressure, and whether the observation joint seeps water, leaks.
(5) alkali metal oxide content
Alkali metal oxide content is the index of outer tube reinforcing material glass fibre, presses GB/T 1549 method tests.
(6) oxygen index (OI)
Limiting oxygen index determination is the oxygen index (OI) of frp layer, and sample needs with suitable cutter internal layer to be cutd open, and presses GB/T 8924 and measures.
(7) the dimension card is heat-resisting
The dimension card is heat-resisting to be interior pipe layer performance, and sample needs with suitable cutter frp layer to be cutd open in order to measure, and measures according to GB/T 1633.
The beneficial effect of plastic-steel composite cable conduit and preparation method thereof is: it has solved a great problem of electric power comb technical field: thermoplastic is a kind of low-down capillary non-polar material that has, almost all non-caked with any adhesive, so be difficult to thermosetting plastics (fiberglass) pipe and thermoplastic pipes are bonded to an integral body.Even common adhesive can temporarily bond together outer tube and interior pipe, still, interior pipe and outer tube also can split after expanding with heat and contract with cold after a while again because the shrinkage difference is huge.In addition, the anti-flammability of conduit integral body, hear resistance, thermal conductivity have also had huge lifting.
Experiment shows, strengthens greatly with the compatibility and the caking property of thermoplastic after this preparation method modification and resin, can well modified thermoplastic and thermosetting plastics (fiberglass) be bonded to an integral body.The shrinkage factor of modified thermoplastic also has been reduced to 0.1%-0.3% by known 1.8%-2.5%, with modification after the shrinkage factor of thermosetting plastics (fiberglass) reached consistent substantially.Aluminium hydroxide in modified thermoplastic and the thermosetting plastics (fiberglass) or magnesium hydroxide composition; make that the hear resistance of plastic-steel composite cable conduit has reached more than 120 ℃, the thermal conductivity factor of interior pipe improved by 0.17 and brought up to 4.1; water and aluminium oxide that aluminium hydroxide or magnesium hydroxide resolve into when meeting high temperature; thereby played good flame-retardant effect; oxygen index (OI) reaches more than 26, has satisfied the specification requirement of cable protection.Spiral groove technology has advantageously prevented from layering and slip phenomenon to occur between the interior pipe (2) of novel MFPT plastic-steel composite cable conduit of final molding and the outer tube (1).Really realized high-strength, heat-resisting, heat conduction is fast, corrosion-resistant, fire-retardant good, stable performance, wear the superiority that cable is perfectly safe, cost is low, not only energy-conservation but also environmental protection has reached the specification requirement of electric power standard DL/T802.3-2007.
The beneficial effect of this plastic-steel composite cable conduit is:
One, outer tube processing technology innovation: the thermosetting plastics after the modification (fiberglass) mechanical strength height, fire-retardant, good with the caking property of the interior pipe of thermoplastic.The composite cable conduit of known fiberglass and PVC bonding, its feature outer tube is conventional fiberglass, its resin adhesive liquid is traditional pure resin adhesive liquid, wound and solidified moulding behind glass fiber impregnated this resin, though certain mechanical strength and corrosion-resistant is arranged, resistance to elevated temperatures, but its performance is under the cold variation of heat, geometrical variations is bigger, general conventional plastic shrink rate 1-4%, and show that embrittlement is serious, plasticity is relatively poor, inflammable, oxygen index (OI) is below 21, as reaching the oxygen index (OI) of cable tube requirement, need to use flame-retarded resin or add organic fire-retardant, cost an arm and a leg, and not environmental protection, overcome above-mentioned drawback, just must carry out modification, achieve the goal with scientific methods to resin.Our concrete way is not adopt traditional expensive flame-retarded resin glue, organic chemistry fire retardant that also need not be traditional, stopped chemical contamination, energy-conserving and environment-protective have been reached, it is ingenious that to have selected nonpoisonous and tasteless free of contamination aluminium hydroxide or magnesium hydroxide and a spot of talcum powder, high-quality calcium carbonate in right amount for use be filler, both changed former thermosetting plastics (fiberglass) embrittlement, increased toughness and ageing resistance, improved mechanical strength and reached fire-retardant requirement, reduced manufacturing cost again.Because compatibility is proper, neither influence original impregnability of glass fibre, improved again with thermoplastic in the caking property of pipe, be to kill two birds with one stone.Another innovation is to add silane coupler in the modification glue, twines when making like this, and an end of the coupling agent of outer pipe internal surface is connected with chemical bond with resin, and the functional group and the inorganic filler of the other end and interior tube-surface are connected with chemical bond.
Two, interior pipe is made the material innovation: the blend of multiple thermoplastic and additive and polymerization, realize performance complement, and the bonding of easy and thermosetting plastics (fiberglass) outer tube, specifically be modification to thermoplastic.Interior tubing matter is divided into four kinds, can take four kinds among any making all can make conduit, be specially following several respects:
(1) be that major ingredient carries out modification: the light weight that utilizes PP with PP, heat-resisting, moderate characteristics, and it is not cold-resistant to it, inflammable, easy to crack, intensity is low, non-polar material is difficult for carrying out with the weakness of other material bondings the mode of physics co-extrusion and chemical graft, changed its weakness, reached practical purpose, economic aim, particularly oxygen index (OI) has been brought up to more than 26 by 18 of ortho states, become firing-difficult matter matter by combustible material, flame retardant effect is very good, the generation of dense smoke when having overcome the PP burning simultaneously, the expensive cost and the chemical contamination of having stopped organic fire-retardant again.Mechanical strength has improved nearly one times, and cold-resistant temperature is increased to-35 ℃ by-15 ℃.By adding glass fibre and Chemical Grafting Technique, improved compatibility and the caking property of modified thermoplastic, and reduced cost with resin.Concrete prescription, enforcement are seen: the A1 in (the 5. specific embodiment)
(2) be that major ingredient carries out modification: PVC plastics light weight with PVC, difficult combustion, wear-resisting, weather-proof, be easy to get, economical, be to use wider pipe material, but it is poor that it exists plasticity, heat-resisting poor (below 80 ℃), degree of drawing is low, weakness such as bending resistance difference, we think that its advantage is greater than disadvantage, so selecting PVC for use is masterbatch, adopt the scientific compatibility proportioning, add heat-resisting CPVC(preferably for reducing cost, consumption is unsuitable too many) and plasticity good, resistant to elevated temperatures PP carries out copolymerization and mixes, utilize the grafting of phthalic acid diallyl fat, by cumyl peroxide, impel vinyltrimethoxy silane, make mixture generate high-quality engineering plastics by the copolymerzation with cross-linking reaction.The heat resisting temperature of modified PVC thermoplastic has been brought up to 120 ℃ by 80 ℃, and resistance to compression, tensile strength are increased to more than the 150MPa by 60MPa, and flexural strength is increased to more than the 210MPa by 90MPa, becomes the engineering plastics female parent of high-quality.Concrete prescription, enforcement are seen: the A2 in (the 5. specific embodiment)
(3) be that major ingredient carries out modification with PE: good, the good insulation preformance of PE plastic chemistry performance.Heat resisting temperature is low, inflammable, shrinkage factor is bigger but it also exists, for overcoming above-mentioned defective, in the PE plastics, add PP, utilize 1, the promotion and the compatibilization of own ethene of 4-and dicyclopentadiene, carry out blend, the plastics heat resisting temperature after the modification has been brought up to more than 100 ℃ by 80 ℃, and tensile strength is brought up to more than the 120MPa by 60MPa.Concrete prescription, enforcement are seen: the A3 in (the 5. specific embodiment)
(4) be that major ingredient carries out modification with CPVC: CPVC plastics heat resisting temperature height, mechanical strength height, but plasticity is poor, easily crisp, cost of material is higher.Therefore adding part PP at the CPVC plastics, is initator with the cumyl peroxide, is bulking agent with CPP, carries out blend, and the CPVC heat resisting temperature of modification has been brought up to more than 120 ℃ by 93 ℃, and tensile strength is brought up to 100MPa by 55MPa.Concrete prescription, enforcement are seen: the A4 in (the 5. specific embodiment)
For reducing cost, more the performance of modified plastics is improved on the highland, scientifically rationally sneaking into calcium carbonate, aluminium hydroxide or employing co-extrusion technologies such as magnesium hydroxide, talcum powder sneaks into glass fibre and carries out modification in the modified plastics, increase thermal conductivity factor (having increased to 0.41) by 0.17, reduced shrinkage ratio (being reduced to 0.1%-0.3%), and cost is dropped to about 20-30% by 1.8%.
Three, the innovation of interior pipe processing technique: the thermoplastic after the modification is sent into the in addition conventional auxiliary material of general extruding machine, be drawn into the tubing of needed thickness and length, as the interior pipe of MFPT multiple tube.Interior tube thickness is that 2-10mm is advisable, approached not wear-resistant, the thick shop layer that can influence outer tube, reduction mechanical strength.Interior pipe can adopt simultaneously special-purpose router in the outer just car system of interior pipe the V-type helical groove (groove width is not less than 2mm, groove depth is not less than 0.5mm), its objective is that the glass fibre winding that will flood the modified resin glue enters this groove, the two is bonded together more firmly, overcome effectively and worn big, the interior Guan Yi of cable frictional force and skid off, caused wearing the unsuccessful disadvantage of cable.
Four, inner tube outer surface is handled innovation: it is compound key technology that inner tube outer surface adopts low-temperature plasma to handle.Inner tube outer surface adopts lower temperature plasma technology to handle, make its surface form a large amount of hydroxyl, carboxyl, carbonyl isoreactivity functional group, the modification glue generation cross-linking chemistry reaction of using when these functional groups can make with outer tube, need not be coated with outward so any binding agent can and thermosetting plastics (fiberglass) layer strong bond, thereby the purpose that has realized saving cost.
In sum: compound as a whole thermosetting plastics and thermoplastic, the two is had complementary advantages, and produces high-strength, heat-resisting, corrosion resistant, fire-retardant, economical and practical composite cable protection pipe has outstanding substantive distinguishing features and significant technological progress.The MFPT composite cable conduit fire resistance that adopts this patented technology to make improves greatly, cold-resistant temperature reaches-40 ℃, heat resisting temperature is more than 120 ℃, thermal conductivity has improved 40%-120%, oxygen index (OI) is brought up to more than 26, weather-proof ageing resistance prolonged more than 15 years, and mechanical strength and electric property have improved 20%-80%, and cost has reduced 10%-30%.
Attached code name meaning:
The implication of MFPT plastic-steel composite cable conduit:
The M-----modification
F-----thermoset frp composite
The P-----thermoplastic
The T-----cable duct tube.
Claims (5)
1. plastic-steel composite cable conduit, it is characterized in that: comprise interior pipe (2) and outer tube (1), in pipe (2) be the modified thermoplastic pipe, outer tube (1) is the thermosetting plastics pipe, interior pipe (2) and outer tube (1) be not by medium but directly be bonded to an integral body.
2. plastic-steel composite cable conduit according to claim 1 is characterized in that: the modified thermoplastic pipe that interior pipe (2) is handled through hacking for outer surface.
3. plastic-steel composite cable conduit according to claim 1 is characterized in that: interior pipe (2) forms the modified thermoplastic pipe of groove through spiral groove for outer surface.
4. plastic-steel composite cable conduit according to claim 1 is characterized in that: interior pipe (2) is the modified thermoplastic pipe of outer surface through Low Temperature Plasma Treating.
5. according to each described plastic-steel composite cable conduit of claim 1-4, it is characterized in that: outer tube (1) is made up of the glass fibre of dipping modified resin glue, described glass fibre becomes entangled in the outer surface of interior pipe (2), and described outer tube (1) is fixed with interior pipe (2) through heating and is bonded to an integral body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220744420 CN203093151U (en) | 2012-12-29 | 2012-12-29 | Plastic steel composite cable duct |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220744420 CN203093151U (en) | 2012-12-29 | 2012-12-29 | Plastic steel composite cable duct |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104725711A (en) * | 2015-03-10 | 2015-06-24 | 淄博迪声绝缘材料有限公司 | Hybrid polyacrylic fibreglass sleeve |
| CN107216579A (en) * | 2017-08-03 | 2017-09-29 | 安徽省又川新材料科技有限公司 | It is a kind of that there is cable duct tube inner tube of strong extension mechanical property and preparation method thereof |
-
2012
- 2012-12-29 CN CN 201220744420 patent/CN203093151U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104725711A (en) * | 2015-03-10 | 2015-06-24 | 淄博迪声绝缘材料有限公司 | Hybrid polyacrylic fibreglass sleeve |
| CN107216579A (en) * | 2017-08-03 | 2017-09-29 | 安徽省又川新材料科技有限公司 | It is a kind of that there is cable duct tube inner tube of strong extension mechanical property and preparation method thereof |
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