CN117450330A - Large-caliber fiber reinforced corrugated steel concrete composite pipe and preparation method thereof - Google Patents
Large-caliber fiber reinforced corrugated steel concrete composite pipe and preparation method thereof Download PDFInfo
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- CN117450330A CN117450330A CN202311561393.9A CN202311561393A CN117450330A CN 117450330 A CN117450330 A CN 117450330A CN 202311561393 A CN202311561393 A CN 202311561393A CN 117450330 A CN117450330 A CN 117450330A
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- corrugated cylinder
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 140
- 239000010959 steel Substances 0.000 title claims abstract description 140
- 239000000835 fiber Substances 0.000 title claims abstract description 118
- 239000004567 concrete Substances 0.000 title claims abstract description 29
- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 55
- 229920005989 resin Polymers 0.000 claims abstract description 55
- 239000011372 high-strength concrete Substances 0.000 claims abstract description 30
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 20
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000002787 reinforcement Effects 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims description 116
- 238000004804 winding Methods 0.000 claims description 31
- 239000004568 cement Substances 0.000 claims description 27
- 239000000853 adhesive Substances 0.000 claims description 18
- 239000011241 protective layer Substances 0.000 claims description 18
- 230000001070 adhesive effect Effects 0.000 claims description 16
- 239000004593 Epoxy Substances 0.000 claims description 15
- 239000003973 paint Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- 239000004760 aramid Substances 0.000 claims description 10
- 229920003235 aromatic polyamide Polymers 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 10
- 239000003365 glass fiber Substances 0.000 claims description 10
- 229920000728 polyester Polymers 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 8
- 229920001577 copolymer Polymers 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 7
- 238000011049 filling Methods 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 229920002748 Basalt fiber Polymers 0.000 claims description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000005253 cladding Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims 2
- 241001330002 Bambuseae Species 0.000 claims 2
- 229920000715 Mucilage Polymers 0.000 claims 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 2
- 239000011425 bamboo Substances 0.000 claims 2
- 238000005260 corrosion Methods 0.000 abstract description 14
- 230000007797 corrosion Effects 0.000 abstract description 12
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/08—Rigid pipes of concrete, cement, or asbestos cement, with or without reinforcement
- F16L9/085—Reinforced pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
- B23K31/027—Making tubes with soldering or welding
-
- 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
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/151—Coating hollow articles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a large-caliber fiber-reinforced corrugated steel concrete composite pipe and a preparation method thereof, and relates to the field of pipeline structures, wherein the composite pipe comprises a high-strength concrete layer, a steel corrugated cylinder, a mixed layer, a fiber reinforcement layer of pre-impregnated resin and a high-density polyethylene outer protection layer which are sequentially arranged from inside to outside and are compositely connected together. The invention uses the large-caliber steel corrugated cylinder as a tube blank, and adopts new materials and new technology to strengthen and protect the tube blank, so that the corrosion resistance and the internal and external pressure bearing capacity of the pipeline are stronger, and the mechanical property is higher.
Description
Technical Field
The invention relates to the field of pipeline structures, in particular to a large-caliber fiber reinforced corrugated steel concrete composite pipe and a preparation method thereof.
Background
The large-caliber steel corrugated cylinder is a pipeline with strong bearing force inside and outside the pipe wall, is commonly used for pipe culverts of municipal administration, roads and hydraulic engineering, can be manufactured by stainless steel materials, can also be manufactured by common steel materials, and has larger lifting space for the corrosion resistance and bearing capacity of the existing steel corrugated cylinder.
Therefore, a person skilled in the art needs to provide a large-caliber fiber reinforced corrugated steel concrete composite pipe and a preparation method thereof, wherein a large-caliber steel corrugated cylinder is used as a pipe blank, and new materials and new processes are adopted to enhance and protect the pipe blank, so that the corrosion resistance and the internal and external pressure bearing capacity of the pipeline are stronger, and the mechanical performance is higher.
Disclosure of Invention
The invention aims to provide a large-caliber fiber reinforced corrugated steel concrete composite pipe and a preparation method thereof, which adopt new materials and new processes to strengthen and protect the inside and outside of the composite pipe, so that the corrosion resistance and the internal and external pressure bearing capacity of the pipeline are stronger, and the mechanical property is higher.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a large-caliber fiber reinforced corrugated steel concrete composite pipe which comprises a high-strength concrete layer, a steel corrugated cylinder, a mixed layer, a fiber reinforced layer of pre-impregnated resin and a high-density polyethylene outer protective layer which are sequentially arranged from inside to outside and are compositely connected together.
Preferably, the mixed layer is formed by co-extrusion of copolymer glue and polyethylene, and the mixed layer fills the trough of the outer surface of the steel corrugated cylinder.
Preferably, the fiber reinforcement layer of the prepreg resin is formed by winding or alternately winding steel fibers, steel fiber belts, glass fiber belts, basalt fiber belts, polyester filament fibers, polyester filament fiber belts, aramid filament fibers and aramid filament fiber belts of the prepreg resin.
Preferably, the inner surface of the steel corrugated cylinder is sprayed to form a cement adhesive layer, the inner surface of the cement adhesive layer is contacted with the high-strength concrete layer, the outer surface of the steel corrugated cylinder is sprayed to form a solvent-free epoxy paint layer, the outer surface of the solvent-free epoxy paint layer is bonded with the fiber reinforced layer of the prepreg resin through the mixing layer, and the high-density polyethylene outer protective layer is coated on the outer peripheral surface of the fiber reinforced layer of the prepreg resin.
Preferably, the two ends of the steel corrugated cylinder are respectively welded with a bell mouth and a spigot, two adjacent steel corrugated cylinders are connected together by inserting the spigot into the bell mouth, the spigot is provided with double grooves, sealing rubber gaskets are sleeved in the grooves, threaded holes are formed between the two grooves, and water plugs are connected in the threaded holes in a threaded manner.
Preferably, resin is poured into the gaps at the tops of the bell mouth and the spigot, and concrete joint compound is poured into the gaps at the interiors of the bell mouth and the spigot.
The preparation method of the large-caliber fiber-reinforced corrugated steel concrete composite pipe comprises the following steps of:
s1: manufacturing a steel corrugated cylinder, selecting thin steel plates with proper wall thickness and materials according to different use working conditions, pressing the thin steel plates into pipelines, and welding the pipelines together to form the steel corrugated cylinder;
s2: welding the bell mouth and the spigot, and respectively welding the two ends of the steel corrugated cylinder with the matched bell mouth and spigot;
s3: casting high-strength concrete, performing rust removal on the inner surface and the outer surface of the steel corrugated cylinder to enable the inner surface and the outer surface to reach certain roughness, casting the inner surface of the steel corrugated cylinder to form a high-strength concrete layer, filling the trough in the steel corrugated cylinder and being higher than the crest by the high-strength concrete, and casting the high-strength concrete at the joint of the bell mouth and the spigot and the steel corrugated cylinder;
s4: filling the wave trough outside the steel corrugated cylinder, and co-extruding copolymer adhesive and polyethylene to fill the wave trough outside the steel corrugated cylinder, wherein the mixed layer at the wave trough outside the steel corrugated cylinder is lower than the wave crest or flush wave crest or higher than the wave crest;
s5: the outer surface of the mixed layer is formed by winding or alternately winding pre-impregnated resin fibers or fiber strips, the fiber reinforcement layer of the pre-impregnated resin is formed by winding or alternately winding pre-impregnated resin steel fibers, steel fiber strips or pre-impregnated resin glass fiber strips or pre-impregnated resin basalt fiber strips or pre-impregnated resin polyester filament fibers, polyester filament fiber strips or pre-impregnated resin aramid filament fibers and aramid filament fiber strips, the fiber diameter and winding layer number of the fibers or fiber strips are determined according to the use condition and the product design, and the winding is finished to form the fiber reinforcement layer of the pre-impregnated resin;
s6: coating a high-density polyethylene outer protective layer on the outer surface of the fiber reinforced layer of the presoaked resin in a lateral winding mode;
s7: when installing the connecting pipeline, a user connects the two pipelines together through a bell mouth and a spigot socket in a socket mode, after the installation connection is completed, the air tightness of the sealing gasket is tested through a water plug on site, after the test is completed, resin is poured into the gap between the tops of the bell mouth and the spigot socket, and concrete joint filling agent is poured into the gap between the inside of the bell mouth and the inside of the spigot socket, so that the connection of the two pipelines is completed.
Preferably, S3 comprises the steps of:
s31: and (3) performing rust removal on the inner surface and the outer surface of the steel corrugated cylinder, spraying a solvent-free epoxy paint layer on the outer surface of the steel corrugated cylinder, spraying a cement adhesive cement layer on the inner surface of the steel corrugated cylinder, and pouring high-strength concrete on the inner surface of the cement adhesive cement layer.
Preferably, S4 comprises the steps of: when the mixed layer at the trough of the steel corrugated cylinder is lower than the crest, winding or alternately winding fiber or fiber band of prepreg resin on the outer surface of the mixed layer, wherein the thickness of the wound fiber or fiber band is lower than the crest or even crest;
when the mixed layer at the trough outside the steel corrugated cylinder is flush with or higher than the crest, the fiber or fiber band of the presoaked resin is directly wound or alternatively wound on the surface of the mixed layer.
Compared with the prior art, the invention has the beneficial technical effects that:
(1) The high-strength concrete layer is poured in the steel corrugated cylinder, so that the high-strength concrete has low cost, certain thickness, high strength, good mechanical property and corrosion resistance, and can be suitable for conveying various media;
(2) According to the invention, the inner surface of the prefabricated steel corrugated cylinder is provided with the anti-corrosion cement adhesive cement, so that the performance of the product in resisting corrosion of a conveying medium in a pipeline is improved, and meanwhile, the combination of the steel corrugated cylinder and a high-strength concrete layer is enhanced;
(3) The anti-corrosion measure of the solvent-free epoxy paint layer adopted by the invention for the outer surface of the prefabricated steel corrugated cylinder not only improves the anti-pollution and corrosion resistance properties of the outer surface of the steel corrugated cylinder when the production interval and the pipeline are put into use, but also can be bonded with the upper copolymer adhesive in a high-strength way, thereby effectively enhancing the bonding force between the steel corrugated cylinder and the high-density polyethylene filling layer;
(4) The fiber or fiber band of the presoaked resin adopted by the reinforcing layer is a novel material with high strength, the tensile strength is high, the price is lower than that of other materials with the same strength, the reinforcing layer is formed by adopting a mode of winding or alternately winding the fiber or fiber band, the fiber is uniformly dispersed and arranged in a resin base material, the resin base material forms 100 percent of full cladding on the fiber, the contact probability of a metal material and a corrosive medium is effectively reduced, and the fiber or fiber band layer and the layer are bonded into a whole through hot melting, so that the penetration of various mediums is completely avoided, and the corrosion resistance of the reinforcing layer is greatly improved;
(5) The high-density polyethylene outer protective layer has good toughness, is an elastomer, and can counteract various mechanical external forces in the transportation and installation process, thereby effectively protecting the fiber reinforced layer from being damaged by other external forces. Meanwhile, the high-density polyethylene outer protective layer has excellent acid, alkali and salt corrosion resistance in soil environment, and can protect the long-term safe operation of the pipeline.
In summary, the large-caliber fiber reinforced corrugated steel concrete composite pipe is composed of a high-strength concrete layer, a steel corrugated cylinder, a mixed layer, a fiber reinforced layer of pre-impregnated resin and a high-density polyethylene outer protective layer which are sequentially arranged from inside to outside, and has the advantages of higher corrosion resistance, higher internal and external pressure bearing capability, higher mechanical property, convenience in installation and wide application range.
Drawings
The invention is further described with reference to the following description of the drawings.
FIG. 1 is a longitudinal cross-sectional view of a pipe connection of a large caliber fiber reinforced corrugated steel concrete composite pipe of the present invention;
FIG. 2 is a transverse cross-sectional view of one embodiment of the present invention;
fig. 3 is a transverse cross-sectional view of another embodiment of the present invention.
Reference numerals illustrate: 1. a steel corrugated cylinder; 2. a high-strength concrete layer; 3. a solvent-free epoxy paint layer; 4. a cement layer; 5. a mixed layer; 6. a fiber reinforced layer of prepreg resin; 7. an outer protective layer of high density polyethylene; 8. a socket; 9. a socket; 10. sealing rubber cushion; 11. a water plug; 12. a resin; 13. and (3) a concrete joint mixture.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in figures 1-3, the large-caliber fiber reinforced corrugated steel concrete composite pipe comprises a high-strength concrete layer 2, a steel corrugated cylinder 1, a mixed layer 5, a fiber reinforced layer 6 of pre-impregnated resin and a high-density polyethylene outer protective layer 7 which are sequentially arranged from inside to outside and are compositely connected together.
The mixing layer 5 is formed by co-extrusion of copolymer adhesive and polyethylene, and the mixing layer 5 fills the trough of the outer surface of the steel corrugated cylinder 1.
The fiber reinforcement layer 6 of the presoaked resin is formed by winding or alternately winding steel fibers, steel fiber belts, glass fiber belts, basalt fiber belts, polyester filament fibers, polyester filament fiber belts, aramid filament fibers and aramid filament fiber belts of the presoaked resin.
Specifically, the steel fiber band is a band which is manufactured by welding ultra-fine steel wires with the diameter ranging from 0.10mm to 0.30mm through a resin base material in parallel; the glass fiber belt is a belt with a certain range of width, which is prepared by uniformly dispersing glass fibers in a resin substrate according to a certain proportion. The fiber reinforcement layer 6 of the prepreg resin has an overall thickness of 0.2 to 20mm or more wound, and the higher the pressure, the more turns wound, so the thicker the thickness.
The inner surface of the steel corrugated cylinder 1 is sprayed to form a cement adhesive cement layer 4, the inner surface of the cement adhesive cement layer 4 is contacted with the high-strength concrete layer 2, the outer surface of the steel corrugated cylinder 1 is sprayed to form a solvent-free epoxy paint layer 3, the outer surface of the solvent-free epoxy paint layer 3 is bonded with a fiber reinforced layer 6 of the prepreg resin through the mixed layer 5, and the outer periphery of the fiber reinforced layer 6 of the prepreg resin is coated with a high-density polyethylene outer protective layer 7.
As shown in fig. 1, two ends of the steel corrugated tube 1 are respectively welded with a bell mouth 8 and a spigot 9, two adjacent steel corrugated tubes 1 are inserted into the bell mouth 8 through the spigot 9 and connected together, the spigot 9 is provided with double grooves, sealing rubber gaskets 10 are sleeved in the grooves, threaded holes are formed between the two grooves, and water plugging heads 11 are connected in the threaded holes in a threaded mode. Specifically, the water blocking head 11 is an experimental device for detecting the air tightness of the sealing rubber pad 10 after the pipe connection and installation process of the pipe construction pipe is completed.
The top gap of the bell mouth 8 and the spigot 9 is filled with resin 12, and the inner gap of the bell mouth 8 and the spigot 9 is filled with concrete joint mixture 13.
The preparation and connection process of the composite pipe of the invention is as follows:
firstly, manufacturing a steel corrugated cylinder, selecting thin steel plates with proper wall thickness and materials according to different use working conditions, pressing the thin steel plates into pipelines, and welding the pipelines together to form the steel corrugated cylinder;
secondly, welding a bell mouth and a spigot, and respectively welding a bell mouth 8 and a spigot 9 which are matched with each other at two ends of the steel corrugated cylinder 1;
then casting high-strength concrete, performing rust removal on the inner surface and the outer surface of the steel corrugated cylinder 1 to enable the inner surface and the outer surface to reach certain roughness, casting the inner surface of the steel corrugated cylinder 1 to form a high-strength concrete layer 2, filling the trough in the steel corrugated cylinder 1 and being higher than the crest by the high-strength concrete, and casting the high-strength concrete at the joint of the bell mouth 8 and the spigot 9 and the steel corrugated cylinder 1;
according to different actual working conditions, whether the cement adhesive cement layer 4 is sprayed on the inner surface and the outer surface of the steel corrugated cylinder 1 and the solvent-free epoxy paint layer 3 is sprayed on the inner surface and the outer surface of the steel corrugated cylinder 1 can be selected, if spraying is needed, rust removal is carried out on the inner surface and the outer surface of the steel corrugated cylinder 1, then the solvent-free epoxy paint layer 3 is sprayed on the outer surface of the steel corrugated cylinder 1, the cement adhesive cement layer 4 is sprayed on the inner surface of the steel corrugated cylinder 1, and then high-strength concrete is poured on the inner surface of the cement adhesive cement layer 4.
Then, filling the wave trough outside the steel corrugated cylinder 1, and co-extruding copolymer adhesive and polyethylene to fill the wave trough outside the steel corrugated cylinder 1, wherein a mixed layer 5 at the wave trough outside the steel corrugated cylinder 1 is lower than the wave crest or flush wave crest or higher than the wave crest;
specifically, when the mixed layer 5 at the trough of the steel corrugated tube 1 is lower than the crest, winding or alternately winding the fiber or fiber band of the presoaked resin on the outer surface of the mixed layer 5, wherein the thickness of the wound fiber or fiber band is lower than the crest or even crest; when the mixed layer 5 at the wave trough outside the steel corrugated drum 1 is flush with or higher than the wave crest, the fiber or fiber band of the presoaked resin is directly wound or alternatively wound on the surface of the mixed layer 5. The fiber diameter and the winding layer number of the fiber or the fiber band are determined according to the use condition and the product design, and the winding is finished to form a fiber reinforced layer 6 of the prepreg resin;
then, coating a high-density polyethylene outer protective layer 7 on the outer surface of the fiber reinforced layer 6 of the presoaked resin in a lateral winding mode;
finally, installing connecting pipelines, when a user installs two pipelines, connecting the two pipelines together through socket 8 and spigot 9 in a socket way, after the installation and connection are completed, performing an airtight pressing test on a sealing gasket on site through a water plug 11, after the test is completed, pouring resin 12 into the gap between the tops of the socket 8 and the spigot 9, and pouring concrete joint mixture 13 into the gap between the socket 8 and the spigot 9, thereby completing the connection of the two pipelines.
Specifically, the caliber of the fiber reinforced corrugated steel concrete composite pipe is DN 600-DN 4000, the fixed length is 2-12 meters, and the size of the fiber reinforced corrugated steel concrete composite pipe can be adjusted according to actual practice.
Specifically, the sealing gasket 10 is a sealing ring made of high-performance corrosion-resistant rubber or corrosion-resistant polymer material, and in addition, bent pipe pieces with the same structure and different turning angles can be processed.
Specifically, the thickness of the steel sheet is 2-8 mm, and the steel sheet adopts a steel sheet with galvanized outer surface or Q235 steel or stainless steel 201 or stainless steel 304.
The thickness of the solvent-free epoxy paint layer 3 is 50-80 mu m, and the thickness of the cement adhesive cement layer 4 is 300-500 mu m;
and casting the wave crest thickness in the steel corrugated cylinder 1 by using high-strength concrete to be 20-50 mm.
The mixed layer 5 at the trough of the steel corrugated cylinder 1 is 0.5-1.0 mm higher than the crest of the wave;
the coating thickness of the high-density polyethylene outer protective layer 7 is 5-15 mm.
As shown in fig. 2, in one specific embodiment, the composite pipe is formed by a high-strength concrete layer 2, a steel corrugated cylinder 1, a mixed layer 5, a steel fiber band of pre-impregnated resin and a high-density polyethylene outer protective layer 7 from inside to outside, wherein a steel sheet is Q235 steel, and the thickness of a peak in the steel corrugated cylinder 1 is 20mm; the fiber reinforced layer 6 of the presoaked resin adopts a steel fiber belt of the presoaked resin, the winding thickness of the steel fiber belt is 5mm, the mixed layer 5 at the wave trough outside the steel corrugated drum 1 is 0.5mm higher than the wave crest, and the cladding thickness of the high-density polyethylene outer protective layer 7 is 15mm.
As shown in fig. 3, another specific embodiment is that the composite pipe is composed of a high-strength concrete layer 2, a cement mortar layer 4, a steel corrugated cylinder 1, a solvent-free epoxy paint layer 3, a mixed layer 5, a glass fiber band of presoaked resin and a high-density polyethylene outer protective layer 7 from inside to outside, specifically, the steel sheet adopts Q235 steel, the thickness of the solvent-free epoxy paint layer 3 formed by spraying the outer surface of the steel corrugated cylinder 1 is 60 μm, the thickness of the cement mortar layer 4 formed by spraying the inner surface of the steel corrugated cylinder 1 is 400 μm, and the thickness of a peak in the steel corrugated cylinder 1 is 20mm; the fiber reinforced layer 6 of the presoaked resin adopts a glass fiber belt of the presoaked resin, the winding thickness of the glass fiber belt is 5mm, the mixed layer 5 at the trough of the steel corrugated drum 1 is 0.5mm higher than the crest of the wave, and the cladding thickness of the high-density polyethylene outer protective layer 7 is 15mm.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (9)
1. A large-caliber fiber reinforced corrugated steel concrete composite pipe is characterized in that: comprises a high-strength concrete layer (2), a steel corrugated cylinder (1), a mixed layer (5), a fiber reinforced layer (6) of presoaked resin and a high-density polyethylene outer protective layer (7) which are sequentially arranged from inside to outside and are in composite connection.
2. The large caliber fiber reinforced corrugated steel concrete composite pipe as claimed in claim 1, wherein: the mixing layer (5) is formed by co-extrusion of copolymer adhesive and polyethylene, and the mixing layer (5) fills the trough of the outer surface of the steel corrugated cylinder (1).
3. The large caliber fiber reinforced corrugated steel concrete composite pipe as claimed in claim 1, wherein: the fiber reinforcement layer (6) of the presoaked resin is formed by winding or alternately winding steel fibers, steel fiber belts, glass fiber belts, basalt fiber belts, polyester filament fibers, polyester filament fiber belts, aramid filament fibers and aramid filament fiber belts of the presoaked resin.
4. A heavy caliber fiber reinforced corrugated steel concrete composite pipe as claimed in claim 3, wherein: the inner surface spraying of steel ripple section of thick bamboo (1) forms cement mucilage layer (4), the inner surface of cement mucilage layer (4) with high strength concrete layer (2) contact, the surface spraying of steel ripple section of thick bamboo (1) forms solvent-free epoxy paint layer (3), the surface of solvent-free epoxy paint layer (3) is through mix layer (5) with prepreg resin's fiber reinforcement layer (6) bonds together, high density polyethylene outer protective layer (7) cladding is in prepreg resin's fiber reinforcement layer (6) outer peripheral face.
5. The large caliber fiber reinforced corrugated steel concrete composite pipe as claimed in claim 1, wherein: the two ends of the steel corrugated cylinder (1) are welded with a bell mouth (8) and a spigot (9) respectively, two adjacent steel corrugated cylinders (1) are inserted into the bell mouth (8) through the spigot (9) to be connected together, the spigot (9) is provided with double grooves, sealing rubber gaskets (10) are sleeved in the grooves, threaded holes are formed between the two grooves, and water plugging heads (11) are connected in the threaded holes in a threaded mode.
6. The large caliber fiber reinforced corrugated steel concrete composite pipe as claimed in claim 5, wherein: the top gap of the bell mouth (8) and the spigot (9) is filled with resin (12), and the inner gap of the bell mouth (8) and the spigot (9) is filled with concrete joint mixture (13).
7. The method for preparing the large-caliber fiber reinforced corrugated steel concrete composite pipe according to any one of claims 1 to 6, which is characterized in that: the method comprises the following steps:
s1: manufacturing a steel corrugated cylinder, selecting thin steel plates with proper wall thickness and materials according to different use working conditions, pressing the thin steel plates into pipelines, and welding the pipelines together to form the steel corrugated cylinder;
s2: the bell mouth and the spigot are welded, and two ends of the steel corrugated cylinder (1) are respectively welded with the matched bell mouth (8) and the matched spigot (9);
s3: casting high-strength concrete, performing rust removal on the inner surface and the outer surface of the steel corrugated cylinder (1) to enable the inner surface and the outer surface to reach certain roughness, casting a high-strength concrete layer (2) on the inner surface of the steel corrugated cylinder (1), filling the trough in the steel corrugated cylinder (1) and being higher than the crest by the high-strength concrete, and casting the high-strength concrete at the joint of the bell mouth (8) and the spigot mouth (9) and the steel corrugated cylinder (1);
s4: filling wave troughs outside the steel corrugated cylinder (1), co-extruding copolymer glue and polyethylene to fill the wave troughs outside the steel corrugated cylinder (1), wherein a mixed layer (5) at the wave troughs outside the steel corrugated cylinder (1) is lower than wave crests or flush wave crests or higher than wave crests;
s5: the outer surface of the mixed layer (5) is wound or alternately wound with resin-presoaked fibers or fiber strips, the resin-presoaked fiber reinforcement layer (6) is formed by winding or alternately winding resin-presoaked steel fibers, steel fiber strips or resin-presoaked glass fiber strips or resin-presoaked basalt fiber strips or resin-presoaked polyester filament fibers, polyester filament fiber strips or resin-presoaked aramid filament fibers and aramid filament fiber strips, the fiber diameter and winding layer number of the fibers or fiber strips are determined according to the use condition and the product design, and the winding is finished to form the resin-presoaked fiber reinforcement layer (6);
s6: coating a high-density polyethylene outer protective layer (7) on the outer surface of the fiber reinforced layer (6) of the presoaked resin in a lateral winding mode;
s7: when installing connecting pipelines, a user installs two pipelines, the two pipelines are connected together through a bell and spigot joint of a bell and spigot joint (8) and a spigot joint (9), after the installation connection is completed, a sealing gasket is made through a water plug (11) on site, after the test is completed, resin (12) is poured at the gap between the tops of the bell and spigot joint (8) and the spigot joint (9), and a concrete joint mixture (13) is poured at the gap between the bell and spigot joint (8) and the spigot joint (9), so that the connection of the two pipelines is completed.
8. The method for preparing the large-caliber fiber-reinforced corrugated steel concrete composite pipe, as claimed in claim 7, is characterized in that: s3 comprises the following steps:
s31: derusting work is carried out on the inner surface and the outer surface of the steel corrugated cylinder (1), then a solvent-free epoxy paint layer (3) is formed on the outer surface of the steel corrugated cylinder (1) in a spraying mode, a cement adhesive cement layer (4) is formed on the inner surface of the steel corrugated cylinder (1) in a spraying mode, and then high-strength concrete is poured on the inner surface of the cement adhesive cement layer (4).
9. The method for preparing the large-caliber fiber-reinforced corrugated steel concrete composite pipe, as claimed in claim 7, is characterized in that: s4 comprises the following steps: when the mixed layer (5) at the trough of the steel corrugated cylinder (1) is lower than the crest, winding or alternately winding the fiber or fiber band of the presoaked resin on the outer surface of the mixed layer (5), wherein the thickness of the wound fiber or fiber band is lower than the crest or the even crest;
when the mixed layer (5) at the trough of the steel corrugated cylinder (1) is flush with or higher than the crest, the surface of the mixed layer (5) is directly wound or alternately wound with the fiber or fiber band of the prepreg resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311561393.9A CN117450330A (en) | 2023-11-22 | 2023-11-22 | Large-caliber fiber reinforced corrugated steel concrete composite pipe and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311561393.9A CN117450330A (en) | 2023-11-22 | 2023-11-22 | Large-caliber fiber reinforced corrugated steel concrete composite pipe and preparation method thereof |
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| CN117450330A true CN117450330A (en) | 2024-01-26 |
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| CN202311561393.9A Pending CN117450330A (en) | 2023-11-22 | 2023-11-22 | Large-caliber fiber reinforced corrugated steel concrete composite pipe and preparation method thereof |
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| Country | Link |
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| CN (1) | CN117450330A (en) |
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- 2023-11-22 CN CN202311561393.9A patent/CN117450330A/en active Pending
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