WO2017177708A1 - 一种超大口径的竹缠绕复合管及其制造方法 - Google Patents

一种超大口径的竹缠绕复合管及其制造方法 Download PDF

Info

Publication number
WO2017177708A1
WO2017177708A1 PCT/CN2016/109888 CN2016109888W WO2017177708A1 WO 2017177708 A1 WO2017177708 A1 WO 2017177708A1 CN 2016109888 W CN2016109888 W CN 2016109888W WO 2017177708 A1 WO2017177708 A1 WO 2017177708A1
Authority
WO
WIPO (PCT)
Prior art keywords
bamboo
layer
curtain
thickness
inner liner
Prior art date
Application number
PCT/CN2016/109888
Other languages
English (en)
French (fr)
Inventor
叶柃
Original Assignee
浙江鑫宙竹基复合材料科技有限公司
叶柃
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 浙江鑫宙竹基复合材料科技有限公司, 叶柃 filed Critical 浙江鑫宙竹基复合材料科技有限公司
Publication of WO2017177708A1 publication Critical patent/WO2017177708A1/zh

Links

Images

Classifications

    • 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
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Definitions

  • the invention belongs to the technical field of composite pipes, and more particularly to an ultra-large diameter bamboo-wound composite pipe and a manufacturing method thereof.
  • CN200910099279.2 discloses a method for preparing a bamboo fiber wound composite pipe, wherein the pipe is provided from the inside to the outside as an inner liner layer, a reinforcing layer and an outer protective layer, and the reinforcing layer is made of a rolled bamboo fiber sheet. It is unwound on a winding machine, and is first coated with a modified material such as epoxy resin through a resin bath, and then wound on the inner liner of the straight tube mold to be finally solidified.
  • a modified material such as epoxy resin
  • CN201010301399.9 discloses a preparation method of a straight bamboo strip reinforced bamboo double tube, wherein a continuous bamboo sheet in a roll is unwound on a winding machine, and a plurality of continuous bamboo pieces are first impregnated with resin through a vertical groove, and then The annular winding is wound on the inner liner to form a hoop-reinforced layer, and then the curtain-like straight bamboo strip is placed outside the annular reinforcing layer to strengthen the pipeline, and the outer layer is wound around the annular reinforcing layer, thereby being solidified and formed to be strengthened. The layers are finally sprayed outside the reinforcement layer to form an outer protective layer.
  • the basic principle of these new bio-based pipes is to make full use of the axial tensile strength of bamboo fibers and to form a stress-free defect distribution in the pipe structure, which is not only in compressive strength, stiffness, but also in comparison with conventional pipes of various types. It has excellent performance in many major indicators such as weight, anti-corrosion and insulation properties, and the raw materials are renewable resources.
  • the production process basically has no three-discharge, and it has the characteristics of low-carbon environmental protection, energy-saving and emission reduction, and is therefore listed in the national key promotion. Carbon technology project directory.
  • the present invention provides an ultra-large diameter bamboo-wound composite pipe and a manufacturing method thereof, wherein the structural composition and arrangement of each key component are fully combined with the specific occasion of the super large pipe diameter. It is considered and redesigned, especially for some important structural parameters that directly affect the processing and manufacturing reliability of the super-large-diameter composite pipe. The specific tests show that it can not only effectively overcome the pipe diameter. Significantly increase the various adverse effects, and ensure that this oversized bamboo-wound composite pipe maintains its own stress-free defect distribution characteristics for a long time, so it is especially suitable for agricultural irrigation, seawater transportation, power plant circulating water, Oil and gas transportation, mixed mortar, urban drainage and sewage And other applications.
  • an oversized bamboo-wound composite pipe characterized in that the inner diameter of the bamboo-wound composite pipe is from 1800 mm to 4000 mm, further preferably from 2200 mm to 3600 mm, and The inner liner layer, the composite reinforcement layer and the outer protective layer are sequentially arranged from the inside to the outside; wherein:
  • the inner liner layer is obtained by curing a fiber mat or a non-woven fabric impregnated with an adhesive, and forms an impervious and smooth inner wall; the composite reinforcing layer is wound by a multi-layered bamboo curtain with a resin adhered thereto.
  • the inner lining layer is externally solidified, and the bamboo quilt curtain is a curtain structure composed of a plurality of bamboo rafters connected by a braided wire, and all the bamboo drapes have a winding angle of 85° to 90° with respect to the inner lining.
  • the composite reinforcing layer includes a first reinforcing layer and a second reinforcing layer from the inside to the outside, wherein the bamboo of the first reinforcing layer
  • the curtain is made of a circular bamboo curtain, that is, the length direction of all the bamboo rafts is consistent with the length direction of the bamboo curtain, and the bamboo curtain of the second reinforcement layer adopts an axial bamboo curtain, that is, all bamboo rafts.
  • the length direction of the bamboo drapes is consistent with the width direction of the bamboo drapes, and the thickness of the first reinforced layer is at least 70% of the total thickness of the reinforced layer; the outer protective layer is directly coated and cured at the The outer surface of the second reinforcement layer, and it is waterproof, anti-corrosive and anti-corrosive Shooting role.
  • the composite reinforcing layer is mixed with a resin by using a multi-layer bamboo curtain instead of a separate bamboo raft or strip.
  • Winding which not only helps the resin to obtain sufficient and uniform filling of the spacing of adjacent bamboo curtains in the radial direction of the pipe and the gaps inside them, but more importantly, it can obtain the bamboo curtain in the circumferential direction.
  • Fully stretched to maximize the axial tensile strength, and at the same time effectively overcome the phenomenon that the tail end of the bamboo curtain is easy to warp; on the other hand, the composite reinforcement layer is divided into multi-layer structures and each adopts different preparation methods.
  • the bamboo curtains are layer-by-layer processed, especially for their different thickness ratios, which can make the two different bamboo curtains complement each other well and lead to the composite winding layer formed by the final winding. Even in the case of a significant expansion of the pipe diameter, the pipe structure can be well maintained without stress distribution defects. At the same time, the performance of the bamboo-wound composite pipe in terms of pressure resistance, ring stiffness and long-term use quality stability is improved.
  • the composite reinforcing layer preferably further includes a third reinforcing layer
  • the bamboo curtain of the third reinforcing layer also adopts a bamboo raft of the circumferential bamboo drapes, that is, the length direction of all the bamboo rafts.
  • the length direction of the curtain is kept uniform, and then the outer side of the second reinforcing layer is continuously wound in a hoop manner with a winding angle of 85 to 90 .
  • the sum of the thicknesses of the first reinforcement layer and the third reinforcement layer is further set to be 85% to 90% of the total thickness of the composite reinforcement layer, and the thickness of the second reinforcement layer is set to account for The total thickness of the composite reinforcing layer is 10% to 15%.
  • the specification parameters thereof are preferably set as follows: a length of 1500 mm to 2500 mm, a width of 4 mm to 10 mm, and a thickness of 0.5 mm. ⁇ 1.5mm, and lap joints to form a ring-shaped bamboo curtain with a length of more than 100m and a width of 20mm to 50mm.
  • the specification parameters thereof are preferably set as follows: a length of 20 mm to 50 mm, a width of 4 mm to 10 mm, a thickness of 0.5 mm to 1.5 mm, and a piece by piece A ring-shaped bamboo curtain with a length of more than 100 m and a width of 20 mm to 50 mm is formed.
  • the above design of the above specifications of bamboo rafts and two types of bamboo drapes is mainly considered as one of the basic components of the composite reinforced layer, and the bamboo fiber size and its arrangement are all It will directly affect the strength of each bamboo raft and the bamboo crepe roll, especially the axial tensile strength. Therefore, in this patent, it has also been specifically researched and tested, and the above specific parameter specifications are set to better Meets the requirements for the manufacture and use of oversized caliber bamboo wound pipes.
  • the cross-sectional shape of bamboo sheet is preferably processed into a rectangular shape, a water content of 10% to 20%, and the area of the gap between adjacent sheets of bamboo 0.09cm 2 ⁇ 0.25cm 2.
  • the rectangular bamboo rafts not only help to overlap the end faces, but also obtain a greater degree of closeness to each other on the inner and outer faces thereof, so that the bamboo fibers can be fully obtained in all directions of the composite reinforcing layer.
  • High axial tensile strength characteristics; in addition, bamboo flakes and water content and gap area also have a greater impact on the filling process of the resin component.
  • the above specific specifications can make the resin easier to penetrate into the bamboo curtain and its Fully combined to help improve the structural strength and resistance to impact and impact of various types of reinforcement.
  • the total thickness of the composite reinforcing layer is set to be 90% or more of the entire tube wall thickness, and more preferably 92% to 96% of the entire tube wall thickness.
  • the composite reinforcing layer can play a central role in the pressure bearing of the entire super-large diameter bamboo winding pipe, and it is convenient to guide the processing quality control between the various constituent layers.
  • the above-mentioned composite reinforcing layer may be further provided with a bio-based filler and a curing agent, wherein the resin, the bio-based filler and the curing agent are interposed therebetween.
  • the mass fraction is set to 100:15 to 25:2 to 5, and is mixed and adhered to the bamboo curtain.
  • the resin is selected from the group consisting of polyurethane resin, phenol resin, urea resin or epoxy resin;
  • the bio-based filler is selected from the group consisting of bamboo, wood, hemp, straw, plant husk or other hard biomaterials,
  • the average mesh number is set to 20 to 100.
  • the resin mixture containing the bio-based filler and the curing agent can promote the filling and bonding with the bamboo curtain and the bamboo fiber, and the above-mentioned specific type and granularity of the bio-based filler and the bamboo fiber have a good relationship. Affinity, in turn, can further increase the structural strength of the composite reinforcing layer.
  • the inner liner layer has a thickness of at least 2 mm, and preferably includes a first inner liner layer and a second inner liner layer from the inside to the outside, wherein the first inner liner layer The thickness is smaller than the second inner liner layer, and the resin adhesion amount of the first inner liner layer is set to be larger than the second inner liner layer.
  • the fiber mat or nonwoven fabric in the inner liner layer is preferably a bamboo fiber felt or a bamboo fiber nonwoven fabric, and the bamboo fiber has a diameter of 0.8 mm to 1.2 mm; and the first inner liner layer preferably has 35 g.
  • the second inner liner layer preferably has a fiber mat or a nonwoven fabric of 150 g/m 2 to 300 g/m 2 .
  • a method for manufacturing a super-large diameter bamboo wound composite pipe characterized in that the method comprises the following steps:
  • bamboo rafts The bamboo is cut into a plurality of bamboo rafts according to the following two main specifications: the first bamboo rafts have a length of 1500 mm to 2500 mm, a width of 4 mm to 10 mm, and a thickness of 0.5 mm. ⁇ 1.5mm, the second bamboo raft piece has a length of 20mm ⁇ 50mm, a width of 4mm ⁇ 10mm, and a thickness of 0.5mm ⁇ 1.5mm; then it is degreased, washed and dehydrated;
  • (b) Preparation of bamboo curtain The first type of bamboo rafts are overlapped one by one along the length thereof, and are arranged in parallel along the width direction thereof, and finally weaved to form a circumferential bamboo having a total length of more than 100 m and a width of 20 mm to 50 mm. a curtain, and the overall length direction of the ring-shaped bamboo curtain is consistent with the length direction of all the bamboo sheets; in addition, the second bamboo sheet is overlapped one by one along the width thereof, and finally the total length is more than 100 m. , an axial bamboo curtain of 20 mm to 50 mm, and the overall width direction of the axial bamboo curtain is consistent with the longitudinal direction of all the bamboo sheets;
  • an inner liner having a thickness of at least 2 mm is formed on a straight tube mold with a fiber mat or nonwoven fabric to which an anticorrosive resin is adhered, and an impervious and smooth inner wall is formed;
  • the present invention firstly studies and improves the composite reinforcing layer as a main component of the pipe in various aspects such as its specific structural composition and key parameter combination, especially by placing the bamboo curtains on the inner side and the opposite side of the reinforcing layer respectively.
  • the key parameters such as winding process and thickness ratio are designed differently.
  • the bamboo fiber itself can fully utilize the advantages of high axial strength and toughness to ensure the internal pressure and tube stiffness of the pipe wall. It can also play the role of stress replenishing in multiple directions of the large-diameter pipe wall, and significantly improve the bending and anti-impact of the pipe wall and avoid external cracking, etc., correspondingly better overcome the overall increase due to pipe diameter. Large but may have adverse effects in manufacturing and use;
  • the bamboo rafts, the bamboo drapes, and the resins and fillers constituting the basic constituent units of the first to third reinforcing layers are respectively in their specific sizes, cross-sectional shapes, specific materials, and powders.
  • Several parameters have been specifically designed, because these parameters will also have a greater impact on the manufacture and use of oversized bamboo-wound composite pipes. More tests have shown that the above parameters are not only designed according to the present invention.
  • the bamboo-wound composite pipe with the required caliber can be manufactured with high efficiency and quality, and the quality and performance stability can be ensured under the long-term use environment;
  • the inner liner layer is designed as a multi-layer structure, and the performance specifications, component materials and the like of each layer are respectively designed in a targeted manner, in this way, the smoothness and corrosion resistance of the inner liner layer can be achieved.
  • Sexuality and stress resistance are well balanced, so that even when this oversized bamboo wound pipe is used to transport large flow corrosive media, it is not easy to cause excessive fluid energy consumption or damage to the inner liner.
  • the processing technology of the ultra-large diameter bamboo-wound composite pipe of the invention is basically under normal temperature and pressure. It is easy to control the quality and has no waste discharge in the production process. It has the characteristics of low carbon environmental protection, energy saving and emission reduction.
  • the bamboo-wound composite pipe can be stably maintained for a long time under the inner diameter of 1800mm ⁇ 4000mm or even larger. Its own stress-free defect distribution characteristics can replace various types of conventional pipes and are especially suitable for applications such as agricultural irrigation, seawater transportation, power plant circulating water, oil and gas transportation, urban drainage and sewage disposal.
  • FIG. 1 is a cross-sectional view showing the basic structure of a bamboo-wound composite pipe having an oversized diameter designed in accordance with a preferred embodiment of the present invention
  • Figure 2a is a schematic view showing the structure of a ring-shaped bamboo curtain formed by knitting according to the present invention
  • Figure 2b is a schematic view showing the structure of an axial bamboo curtain formed by knitting according to the present invention.
  • Figure 3 is a flow chart of a process for preparing a super-large diameter bamboo-wound composite pipe according to the present invention
  • Fig. 1 is a cross-sectional view showing the basic structure of an oversized bamboo-wound composite pipe designed in accordance with a preferred embodiment of the present invention.
  • the bamboo-wound composite pipe has a bore diameter of 1800 mm to 4000 mm, further preferably 2200 mm to 3600 mm, and mainly includes an inner liner layer 1, a composite reinforcement layer 2, and an outer protective layer 3 from the inside to the outside.
  • the components are specifically described below one by one.
  • the inner liner 1 is made of a fiber mat or a non-woven fabric to which an anticorrosive resin is adhered, and forms an impervious and smooth inner wall. Its main function is to contact various types of media to be transported, and is not corroded by the medium. And to provide the necessary resistance to internal pressure, ensure that the layer can transport the medium with the lowest possible friction and low fluid transport energy.
  • the inner liner in view of the fact that the diameter of the entire pipe greatly exceeds the specifications of the ordinary pipe, it is preferable to design the inner liner as a structure of two or more layers, specifically, the inner liner includes from the inside to the outside. a first inner liner layer and a second inner liner layer, and the thickness of the first inner liner layer is designed to be smaller than the thickness of the second inner liner layer, while the resin adhesion amount of the first inner liner layer is designed to be larger than the second inner layer The amount of resin adhesion of the liner.
  • the first inner liner on the inner side can be machined to form a smoother inner surface, reducing the friction and energy consumption when transporting the medium, while the second inner liner on the opposite outer side is the entire inner liner.
  • the stress resistance and the combination with the composite reinforcing layer 2 play a more important role, in particular, to avoid impact damage of the medium to the inner liner and the entire pipe in the case of large-diameter large-flow conveying.
  • the inner lining layer can also be processed into a fiber mat or a non-woven fabric by using bamboo fiber, and after more comparative tests, the diameter of the bamboo fiber can be selected from 0.8 mm to 1.2 mm, and the first inner lining layer is adopted.
  • a fiber mat or a nonwoven fabric of 35 g/m 2 to 50 g/m 2 , and a fiber mat or a nonwoven fabric of 150 g/m 2 to 300 g/m 2 is used for the second inner liner layer.
  • the thickness of the entire inner liner it preferably accounts for about 5% to 8% of the wall thickness of the entire pipe.
  • the composite reinforcing layer 2 has a central influence on the tube rigidity and the internal pressure resistance performance of the entire oversized bamboo-wound composite pipe.
  • the composite reinforcement layer 2 must be researched and improved in terms of its specific structural composition and key parameter combinations.
  • the composite reinforcing layer is formed by multi-layer winding a bamboo curtain on the outside of the inner liner 1 while being cured by resin bonding, which can be roughly divided into two or more from the inside to the outside.
  • a plurality of different compositions and functional regions as exemplarily shown in FIG. 1, namely a first reinforcement layer 21 relatively close to the inner liner layer 1 and a second reinforcement layer 22 relatively remote from the inner liner layer 1, wherein the first reinforcement layer 21
  • the twelve-layer or more ring-to-bamboo curtain and the resin or resin mixture are disposed closest to the inner liner layer 1.
  • the inner liner layer is processed on the inner liner layer by a circumferential winding method with a winding angle of 85° to 90°, and the second reinforcement layer 22 continues to be wound around the entire outer surface of the first reinforcement layer 21 .
  • It is preferably composed of two or more layers of bamboo drapes and a resin or a resin mixture, and they are also used in the present invention in a circumferential winding method in which the winding angle is 85 to 90.
  • the thickness of the first reinforcement layer and the third reinforcement layer is set to at least 80% of the total thickness of the composite reinforcement layer % or more, further preferably 85% to 90%; the thickness ratio of the second reinforcing layer corresponds to 10% to 15% of the total thickness of the composite reinforcing layer.
  • the annular bamboo curtain 210 is a piece of bamboo strip 2101 of all first specifications along its length, while a small amount of the first size bamboo slab is along its width.
  • the directions are arranged in parallel, and the final weaving forms a hoop bamboo curtain with a total length of more than 100 m and a width of 20 mm to 50 mm, and the most important feature of the hoop bamboo curtain 210 is that the overall length direction and all the components as the basic components The length of the bamboo rafts is consistent.
  • FIG. 2a the annular bamboo curtain 210 is a piece of bamboo strip 2101 of all first specifications along its length, while a small amount of the first size bamboo slab is along its width.
  • the directions are arranged in parallel, and the final weaving forms a hoop bamboo curtain with a total length of more than 100 m and a width of 20 mm to 50 mm, and the most important feature of the hoop bamboo curtain 210 is that the overall length direction and all the components as the basic components The length of the bamboo rafts is
  • the axial bamboo curtain 220 is formed by lapping all the bamboo slabs 2201 of the second specification in the width direction thereof, and finally forming a total length of more than 100 m and a width of 20 mm. 50mm axial bamboo curtain, the axial bamboo curtain 220 may be composed of a single bamboo sheet in the overall width direction, or a small number of shorter bamboo pieces overlap, but the most important feature is that the axial direction
  • the overall width direction of the bamboo curtain is consistent with the longitudinal direction of all the bamboo rafts as the basic component.
  • the first reinforcement layer 21 (for example, the first layer and the thickness ratio)
  • the reinforcing layer plus the third reinforcing layer can better exert the advantages of high axial strength and toughness of the bamboo fiber itself on the inner side, and ensure the internal pressure resistance and tube stiffness characteristics of the pipe wall when facing the large flow medium.
  • the second reinforcement layer 22 of the above-mentioned layer and thickness ratio enables the stress distribution to be more uniformly dispersed along the plurality of directions of the pipe wall, and significantly improves the bending and impact resistance of the pipe wall and avoids the external Cracking and other phenomena.
  • the above-mentioned bamboo-wound composite pipe can well maintain the characteristics of the pipe structure without stress distribution defects even when the pipe diameter is significantly enlarged, and at the same time improve the pressure resistance and ring of the bamboo-wound composite pipe. Performance such as stiffness, especially stable reliability that guarantees long-term stability.
  • the bamboo fiber size and its arrangement will directly affect the strength of each bamboo roll, especially the axial tensile strength.
  • This patent also carries out targeted research and design.
  • the specification parameters thereof are preferably set as follows: a length of 1500 mm to 2500 mm, a width of 4 mm to 10 mm, and a thickness of 0.5. Mm ⁇ 1.5mm, and lap joints to form a ring-shaped bamboo curtain with a length of more than 100m and a width of 20mm ⁇ 50mm.
  • the specification parameters thereof are preferably set as follows: a length of 20 mm to 50 mm, a width of 4 mm to 10 mm, a thickness of 0.5 mm to 1.5 mm, and a piece by piece A ring-shaped bamboo curtain with a length of more than 100 m and a width of 20 mm to 50 mm is formed. More sample tests have shown that the above specific parameters can better exert the respective performance advantages of the circumferential bamboo curtain and the axial bamboo curtain, so that the combination between the first composite layer and the second composite layer can make people It satisfactorily meets specific occasions such as the manufacture and use of oversized caliber bamboo wound pipes.
  • the cross-sectional shape of the bamboo raft piece is preferably processed into a rectangular shape, the water content is 10% to 20%, and the gap area between adjacent bamboo raft pieces is 0.09 cm 2 ⁇ 0.25cm 2 .
  • the total thickness of the composite reinforcing layer is set to
  • the wall thickness of the entire pipe is 90% or more, and more preferably 92% to 96% of the wall thickness of the entire pipe.
  • the above composite reinforcing layer is preferably added in addition to the essential components such as resin and bamboo slab.
  • the mass fraction between the resin, the bio-based filler and the curing agent is set to 100:15 to 25:2 to 5, and after mixing together The shower is adhered to the bamboo curtain.
  • the resin is selected from the group consisting of polyurethane resin, phenol resin, urea resin or epoxy resin;
  • the bio-based filler is selected from the group consisting of bamboo, wood, hemp, straw, plant husk or other hard biomaterials, And the average mesh number is set to 20 to 100.
  • the resin mixture containing the bio-based filler and the curing agent can promote the filling and bonding with the bamboo curtain and the bamboo fiber, and the above-mentioned specific type and granularity of the bio-based filler and the bamboo fiber have a good relationship.
  • the affinity in turn, can further improve the overall structural strength and internal pressure resistance of the composite reinforcing layer, and contribute to speeding up the molding efficiency and quality controllability during the winding operation of the composite reinforcing layer.
  • the outer protective layer 3 can be directly coated and cured on the outer surface of the composite reinforcing layer 2, and mainly functions as waterproof, anticorrosive and anti-radiation.
  • the outer protective layer can also be sprayed as 2 layers or more, for example, an epoxy resin, an unsaturated polyester resin or a bitumen, and a radiation-proof filler, preferably having a thickness of at least 3 mm, so that Better protection of oversized pipes in all kinds of harsh environments.
  • the bamboo processing is cut into a plurality of bamboo rafts according to the following two sizes.
  • the size of the first bamboo raft is set to 1500m long, 8mm wide, 0.5mm thick, and the moisture content can be 10%.
  • the specifications of the two kinds of bamboo rafts are set to be 20 mm long, 6 mm wide, 1 mm thick, and the moisture content can be selected as 10%, and then degreased, washed and dehydrated for use.
  • the first type of bamboo rafts are overlapped one by one along the length thereof, and are arranged in parallel along the width thereof (for example, six bamboo rafts), and finally form a total length of 150 m and a width of about 48 mm, between adjacent bamboo rafts.
  • a ring-shaped bamboo curtain with a gap area of 0.09 cm 2 in addition, the second type of bamboo rafts are overlapped one by one along the width direction thereof, and finally woven to form a total length of 150 m and a width of 20 mm between adjacent bamboo rafts.
  • the gap area is also an axial bamboo curtain of 0.09 cm 2 .
  • a release film was wrapped on a polished FRP straight tube mold having an outer diameter of 1800 mm, and then a bamboo fiber nonwoven fabric to which an anticorrosive resin was adhered was used to sequentially make a thickness of 2 mm and a density of 35 g on the tube mold.
  • a first inner liner layer of m 2 and a second inner liner layer having a thickness of 3 mm and a density of 200 g/m 2 , wherein the resin is epoxy resin, and the bamboo fiber in the nonwoven fabric has a diameter of about 1 mm, thereby forming Impervious and smooth inner wall.
  • the two kinds of bamboo curtains are respectively rolled up and wound up on a winding machine, and the bamboo curtains are passed through a resin tank containing a urea resin and coated with a sizing resin, and then layer by layer. Wound on the inner liner of the straight pipe mold.
  • the first 12 layers of the ring-shaped bamboo curtain are processed by the circumferential winding method, and the resin is poured onto the bamboo curtain while winding, and the corresponding control is carried out.
  • the thickness of the first reinforcing layer formed is 70% of the total thickness of the composite reinforcing layer, and then the five-layer axial bamboo curtain is continuously wound by means of circumferential winding, and the resin is poured onto the bamboo curtain while winding. And controlling the corresponding formed second reinforcing layer to have a thickness of 30% of the total thickness of the composite reinforcing layer.
  • the resin that is co-adhered during the winding process may be selected from a urea-formaldehyde resin, and finally a composite reinforcing layer having a thickness ratio of 90% of the wall thickness of the entire pipe is obtained.
  • the composite reinforcing layer is solidified into a tube blank, and then the mold release process is performed to obtain a bamboo-wound composite pipe. Finally, a layer of unsaturated polyester resin with waterproof and anti-corrosion function is sprayed on the outside of the pipe, and the thickness is about 3 mm. The final processing is to produce a bamboo-wound composite pipe product with a diameter of 1800 mm.
  • the bamboo processing is cut into a plurality of bamboo rafts according to the following two sizes, and the size of the first bamboo raft is set to be 2000m long, 8mm wide, 0.5mm thick, and the moisture content can be 15%.
  • the specifications of the two kinds of bamboo rafts are set to be 20 mm long, 10 mm wide, and 0.5 mm thick, and the water content can be selected as 15%, and then degreased, washed and dehydrated for use.
  • the first type of bamboo rafts are overlapped one by one along the length thereof, and are arranged in parallel along the width thereof (for example, six bamboo rafts), and finally form a total length of 150 m and a width of about 48 mm, between adjacent bamboo rafts.
  • a circular bamboo curtain with a gap area of 0.12 cm 2 in addition, the second bamboo raft piece is overlapped one by one along the width direction thereof, and finally woven to form a total length of 150 m and a width of 20 mm between adjacent bamboo rafts.
  • the axial bamboo drapes are also 0.12 cm 2 in clearance area.
  • a release film was coated on a polished FRP straight tube mold having an outer diameter of 2200 mm, and then a bamboo fiber nonwoven fabric to which an anticorrosive resin was adhered was used to sequentially make a thickness of 2 mm and a density of 50 g on the tube mold.
  • a first inner liner layer of m 2 and a second inner liner layer having a thickness of 3 mm and a density of 300 g/m 2 , wherein the resin is epoxy resin, and the bamboo fiber in the nonwoven fabric has a diameter of about 1 mm, thereby forming Impervious and smooth inner wall;
  • the bamboo curtains are rolled up and wound up on a winding machine.
  • the bamboo curtains are passed through a resin tank containing a urea resin and coated with a sizing resin, and then wound layer by layer in a straight tube.
  • the first 16 layers of the ring-shaped bamboo curtain are processed by the circumferential winding method, and the resin is poured onto the bamboo curtain while winding, and the thickness of the corresponding first reinforcing layer is controlled to be compounded.
  • the resin adhered together during the winding process may be selected from urea resin and added with a straw powder having an average mesh number of 20 and a small amount of curing agent, wherein the weight fraction between the resin, the straw powder and the curing agent is 100:15. :5, finally obtaining a reinforcing layer whose thickness accounts for 92% of the wall thickness of the whole pipe.
  • the reinforcing layer is solidified into a tube blank, and then the mold release process is performed to obtain a bamboo-wound composite pipe. Finally, a layer of unsaturated polyester resin with a waterproof and anticorrosive function was sprayed on the outside of the pipe to a thickness of about 3 mm, and finally a bamboo-wound composite pipe having a diameter of 2200 mm was obtained.
  • the bamboo processing is cut into a plurality of bamboo rafts according to the following two specifications.
  • the size of the first bamboo raft is set to 2500m long, 4mm wide, 1mm thick, and the moisture content can be selected.
  • the size of the second bamboo raft is set to 40 mm long, 4 mm wide, 1 mm thick, and the moisture content can be selected as 15%, and then degreased, washed and dehydrated for use.
  • the first type of bamboo rafts are overlapped one by one along the length thereof, and are arranged in parallel along the width thereof (for example, 10 bamboo rafts), and finally form a total length of 150 m and a width of about 40 mm, between adjacent bamboo rafts.
  • a circular bamboo curtain with a gap area of 0.25 cm 2 in addition, the second bamboo rafts are overlapped one by one along the width direction thereof, and finally woven to form a total length of 150 m and a width of 40 mm between adjacent bamboo rafts.
  • the gap area is also an axial bamboo curtain of 0.25 cm 2 .
  • a release film was coated on a polished FRP straight tube mold having an outer diameter of 2600 mm, and then a bamboo fiber nonwoven fabric to which an anticorrosive resin was adhered was used to sequentially make a thickness of 3 mm and a density of 50 g on the tube mold.
  • a first inner liner layer of m 2 and a second inner liner layer having a thickness of 5 mm and a density of 300 g/m 2 , wherein the resin may be selected from epoxy resins, and the diameter of the bamboo fibers in the nonwoven fabric is about 1.2 mm, thereby Forming an impervious and smooth inner wall;
  • the bamboo curtains are wound up and wound up on a winding machine.
  • the bamboo curtains are passed through a resin bath containing a phenolic resin and coated with a sizing resin, and then wound layer by layer in a straight tube.
  • the first 24 layers of the circumferential bamboo curtain are processed by the circumferential winding method, and the resin is poured onto the bamboo curtain while winding, and the thickness of the corresponding first reinforcing layer is controlled to reach the thickness.
  • the total thickness is 86.7%.
  • the resin adhered together during the winding process may be selected from a phenolic resin and added with a bamboo powder having an average mesh number of 50 and a small amount of a curing agent, wherein the weight fraction between the resin, the bamboo powder and the curing agent is 100:25. : 5, finally obtaining a reinforcing layer whose thickness accounts for 95% of the wall thickness of the whole pipe.
  • the reinforcing layer is solidified into a tube blank, and then the mold release process is performed to obtain a bamboo-wound composite pipe. Finally, spray a layer of asphalt with waterproof and anti-corrosion function on the outside of the pipe. A radiation-proofing agent is added, which is about 5 mm thick, and finally a bamboo-wound composite pipe product having a diameter of 2600 mm is obtained.
  • the bamboo processing is cut into a plurality of bamboo rafts according to the following two specifications.
  • the size of the first bamboo raft is set to be 2500m long, 10mm wide, 1.5mm thick, and the moisture content can be 10%.
  • the size of the two kinds of bamboo rafts is set to 50 mm in length, 8 mm in width, 1.5 mm in thickness, and the moisture content can be selected as 10%, and then degreased, washed and dehydrated for use.
  • the first type of bamboo rafts are overlapped one by one along the length thereof, and are arranged in parallel along the width thereof (for example, five bamboo rafts), and finally form a total length of 200 m and a width of about 50 mm, between adjacent bamboo rafts.
  • a circular bamboo curtain with a gap area of 0.22 cm 2 in addition, the second bamboo raft piece is overlapped one by one along the width direction thereof, and finally woven to form a total length of 200 m and a width of 50 mm between adjacent bamboo rafts.
  • the gap area is also an axial bamboo curtain of 0.22 cm 2 .
  • a layer of release film is coated on a polished glass fiber reinforced plastic straight tube mold having an outer diameter of 3600 mm, and then a bamboo fiber nonwoven fabric to which an anticorrosive resin is adhered is used to sequentially make a thickness of 3 mm and a density of 50 g/m 2 on the tube mold.
  • a first inner liner layer and a second inner liner layer having a thickness of 5 mm and a density of 250 g/m 2 , wherein the resin is epoxy resin, and the bamboo fiber in the nonwoven fabric has a diameter of about 1.2 mm, thereby forming an anti-defense Infiltrated and smooth inner wall.
  • the bamboo curtains are unwound in a winding machine, and the bamboo curtains are passed through a resin bath containing epoxy resin and coated with a sizing resin, and then wound straight in layers.
  • the inner liner of the tube mold In the whole winding process, the first 32-layer annular bamboo curtain is processed by circumferential winding, and the resin is poured onto the bamboo curtain to form the required thickness, and then continue to be wound by the circumferential winding.
  • the four-layer axial bamboo curtain is wound, and the resin is poured onto the bamboo curtain while winding, and the thickness of the second reinforcing layer formed by the corresponding control is 10% of the total thickness of the composite reinforcing layer.
  • the four-layer annular bamboo curtain is continuously wound in a loopwise manner, and the sum of the thicknesses of the third reinforcing layer formed by the third reinforcing layer and the previously formed first and third reinforcing layers is controlled to account for the total thickness of the composite reinforcing layer. 90%.
  • the resin that is co-adhered during the winding process can be selected as an epoxy resin and added with an average mesh number of 100 hemp powder and a small amount of curing agent, wherein the resin, hemp powder and curing agent are in a weight fraction of 100:20:3, and finally a reinforcing layer having a thickness ratio of 94% of the overall tube wall thickness is obtained.
  • the reinforcing layer is solidified into a tube blank, and then the mold release process is performed to obtain a bamboo-wound composite pipe. Finally, a layer of epoxy resin with a waterproof and anti-corrosive function was sprayed on the outside of the pipe, and the thickness was about 5 mm, and finally a bamboo-wound composite pipe product with a diameter of 3600 mm was obtained.
  • the bamboo processing is cut into a plurality of bamboo rafts according to the following two specifications.
  • the size of the first bamboo raft is set to 1500m long, 6mm wide, 0.5mm thick, and the moisture content can be 20%.
  • the specifications of the two kinds of bamboo rafts are set to 30 mm in length, 6 mm in width, 0.5 mm in thickness, and the moisture content can be selected as 10%, and then degreased, washed and dehydrated for use.
  • the first type of bamboo rafts are overlapped one by one along the length thereof, and are arranged in parallel along the width thereof (for example, five bamboo rafts), and finally form a total length of 200 m and a width of about 30 mm, between adjacent bamboo rafts.
  • a ring-shaped bamboo curtain with a gap area of 0.09 cm 2 in addition, the second type of bamboo sheet is overlapped one by one along the width direction thereof, and finally weaved to form a total length of 200 m and a width of 30 mm between adjacent bamboo sheets.
  • the gap area is also an axial bamboo curtain of 0.09 cm 2 .
  • a layer of release film was wrapped on a polished glass fiber reinforced plastic straight tube mold having an outer diameter of 2600 mm, and then a bamboo fiber nonwoven fabric adhered with an anticorrosive resin was sequentially formed to have a thickness of 5 mm and a density of 50 g on the tube mold.
  • a first inner liner layer of m 2 and a second inner liner layer having a thickness of 7 mm and a density of 300 g/m 2 , wherein the resin may be an unsaturated polyester resin, and the bamboo fiber in the nonwoven fabric has a diameter of about 1.2 mm. This results in an impervious and smooth inner wall.
  • the bamboo curtains are unwound in a winding machine, and the bamboo curtains are passed through a resin bath containing epoxy resin and coated with a sizing resin, and then wound straight in layers.
  • the inner liner of the tube mold In the whole winding process, the first 32-layer annular bamboo curtain is processed by circumferential winding, and the resin is poured onto the bamboo curtain and controlled to the required thickness, and then the circumferential winding is continued.
  • the resin adhered together during the winding process may be selected from epoxy resin and added with a coconut shell powder having an average mesh number of 50 and a small amount of curing agent, wherein the weight fraction between the resin, the coconut shell powder and the curing agent is At 100:15:2, a reinforced layer with a thickness accounting for 90% of the wall thickness of the overall pipe is finally obtained.
  • the reinforcing layer is solidified into a tube blank, and then the mold release process is performed to obtain a bamboo-wound composite pipe. Finally, a layer of asphalt with waterproof and anti-corrosion function is sprayed on the outside of the pipe, and a radiation-proofing agent is added, which is about 5 mm thick, and finally a bamboo-wound composite pipe product with a diameter of 2600 mm is obtained.
  • the bamboo processing is cut into a plurality of bamboo rafts according to the following two specifications.
  • the size of the first bamboo raft is set to be 2000m long, 10mm wide, 1.5mm thick, and the moisture content can be 10%.
  • the size of the two kinds of bamboo rafts is set to 50 mm in length, 10 mm in width, 1.5 mm in thickness, and the moisture content can be selected as 10%, and then degreased, washed and dehydrated for use.
  • the first type of bamboo slabs are overlapped one by one along the length thereof, and are arranged in parallel along the width thereof (for example, five bamboo rafts), and finally form a total length of 250 m and a width of about 50 mm, between adjacent bamboo rafts.
  • a circular bamboo curtain with a gap area of 0.25 cm 2 in addition, the second bamboo rafts are overlapped one by one along the width direction thereof, and finally woven to form a total length of 250 m and a width of 50 mm between adjacent bamboo rafts.
  • the gap area is also an axial bamboo curtain of 0.25 cm 2 .
  • a layer of release film is coated on a polished glass fiber reinforced plastic straight tube mold having an outer diameter of 3600 mm, and then a bamboo fiber nonwoven fabric to which an anticorrosive resin is adhered is used to sequentially make a thickness of 3 mm and a density of 50 g/m 2 on the tube mold.
  • a first inner liner layer and a second inner liner layer having a thickness of 5 mm and a density of 200 g/m 2 , wherein the resin is epoxy resin, and the bamboo fiber in the nonwoven fabric has a diameter of about 0.8 mm, thereby forming an anti-defense Infiltrated and smooth inner wall;
  • the bamboo curtains are unwound in a winding machine, and the bamboo curtains are passed through a resin tank containing a urea resin and coated with a sizing resin, and then wound straight in layers.
  • the inner liner of the tube mold In the whole winding process, the first 26-layer annular bamboo curtain is processed by circumferential winding, and the resin is poured onto the bamboo curtain while winding, and the thickness of the corresponding first reinforcing layer is controlled to be compounded.
  • the resin adhered together during the winding process may be selected from a urea-formaldehyde resin and added with a bamboo powder having an average mesh number of 20 and a small amount of a curing agent, wherein the weight fraction between the resin, the bamboo powder and the curing agent is 100:25. : 5, finally obtaining a reinforcing layer whose thickness accounts for 90% of the wall thickness of the whole pipe.
  • the reinforcing layer is solidified into a tube blank, and then the mold release process is performed to obtain a bamboo-wound composite pipe. Finally, a layer of unsaturated polyester resin with waterproof and anti-corrosion function is sprayed on the outside of the pipe, and the thickness is about 3 mm, and finally a bamboo-wound composite pipe product with a diameter of 3600 mm is obtained.
  • the bamboo processing is cut into a plurality of bamboo rafts according to the following two specifications.
  • the size of the first bamboo raft is set to be 2000m long, 5mm wide, 1.5mm thick, and the moisture content can be 12%.
  • the size of the two kinds of bamboo rafts is set to 20 mm in length, 6 mm in width, 1.5 mm in thickness, and the moisture content can be selected as 12%, and then degreased, washed and dehydrated for use.
  • the first type of bamboo rafts are overlapped one by one along the length thereof, and are arranged in parallel along the width thereof (for example, four bamboo rafts), and finally form a total length of 300 m and a width of about 20 mm, between adjacent bamboo rafts.
  • a ring-shaped bamboo curtain with a gap area of 0.09 cm 2 in addition, the second type of bamboo rafts are overlapped one by one along the width direction thereof, and finally weaved to form a total length of 300 m and a width of 20 mm between adjacent bamboo rafts.
  • the gap area is also an axial bamboo curtain of 0.09 cm 2 .
  • a layer of release film is coated on a polished glass fiber reinforced plastic straight tube mold having an outer diameter of 4000 mm, and then a bamboo fiber nonwoven fabric to which an anticorrosive resin is adhered is used to sequentially make a thickness of 3 mm and a density of 50 g/m 2 on the tube mold.
  • a first inner liner layer and a second inner liner layer having a thickness of 5 mm and a density of 200 g/m 2 , wherein the resin is epoxy resin, and the bamboo fiber in the nonwoven fabric has a diameter of about 1 mm, thereby forming an anti-seepage.
  • smooth inner wall is used to sequentially make a thickness of 3 mm and a density of 50 g/m 2 on the tube mold.
  • the bamboo curtains are rolled up and wound up on a winding machine.
  • the bamboo curtains are passed through a resin tank containing a urea resin and coated with a sizing resin, and then wound layer by layer in a straight tube.
  • the first 40 layers of the circumferential bamboo curtain are processed by the circumferential winding method, and the resin is poured onto the bamboo curtain while winding, and the corresponding first reinforcing layer is controlled to reach the required thickness.
  • the resin adhered together during the winding process may be selected from urea resin and added with a straw powder having an average mesh number of 100 and a small amount of curing agent, wherein the weight fraction between the resin, the straw powder and the curing agent is 100:15. :5, finally obtaining a reinforcing layer whose thickness accounts for 92% of the wall thickness of the whole pipe.
  • the reinforcing layer is solidified into a tube blank, and then the mold release process is performed to obtain a bamboo-wound composite pipe. Finally, a layer of unsaturated polyester resin with waterproof and anti-corrosion function is sprayed on the outside of the pipe, and the thickness is about 3 mm, and finally a bamboo-wound composite pipe product with a diameter of 4000 mm is obtained.
  • the bamboo processing is cut into a plurality of bamboo rafts according to the following two specifications.
  • the size of the first bamboo raft is set to 1500m long, 4mm wide, 1mm thick, and the moisture content can be selected as 18%.
  • the size of the bamboo raft is set to be 40 mm long, 6 mm wide, 1 mm thick, and the moisture content can be selected as 18%, and then degreased, washed and dehydrated for use.
  • the first type of bamboo rafts are overlapped one by one along the length thereof, and are arranged in parallel along the width thereof (for example, 10 bamboo rafts), and finally form a total length of 120 m and a width of about 40 mm, between adjacent bamboo rafts.
  • a ring-shaped bamboo curtain with a gap area of 0.18 cm 2 in addition, the second type of bamboo sheet is overlapped one by one along the width direction thereof, and finally weaved to form a total length of 120 m and a width of 40 mm between adjacent bamboo sheets.
  • the gap area is also an axial bamboo curtain of 0.18 cm 2 .
  • a stripped film was coated on a polished glass fiber reinforced plastic straight tube mold having an outer diameter of 2200 mm, and then a bamboo fiber nonwoven fabric adhered with an anticorrosive resin was sequentially used to make a thickness of 2 mm and a density of 35 g/m 2 on the tube mold.
  • a first inner liner layer and a second inner liner layer having a thickness of 4 mm and a density of 200 g/m 2 , wherein the resin is epoxy resin, and the bamboo fiber in the nonwoven fabric has a diameter of about 0.8 mm, thereby forming an anti-defense Infiltrated and smooth inner wall.
  • the bamboo curtains are unwound in a winding machine, and the bamboo curtains are passed through a resin bath containing epoxy resin and coated with a sizing resin, and then wound straight in layers.
  • the inner liner of the tube mold In the whole winding process, the first 12-layer annular bamboo curtain is processed by circumferential winding, and the resin is poured onto the bamboo curtain while winding, and the thickness of the corresponding first reinforcing layer is controlled to reach the thickness.
  • the resin adhered together during the winding process may be selected from epoxy resin and added with a wood powder having an average mesh number of 80 and a small amount of curing agent, wherein the weight fraction between the resin, the wood powder and the curing agent is 100: At 20:5, a reinforcement layer with a thickness accounting for 96% of the overall tube wall thickness is finally obtained.
  • the reinforcing layer is solidified into a tube blank, and then the mold release process is performed to obtain a bamboo-wound composite pipe. Finally, a layer of unsaturated polyester resin with a waterproof and anticorrosive function was sprayed on the outside of the pipe, and the thickness was about 3 mm, and finally a bamboo-wound composite pipe product with a diameter of 2200 mm was obtained.

Abstract

一种超大口径的竹缠绕复合管，该竹缠绕复合管从内到外包括内衬层（1）、复合增强层（2）和外防护层（3），其中内衬层（1）由粘附有防腐树脂的纤维毡或无纺布制成；复合增强层（2）由两种不同类型的竹篾帘按照适当的层数和厚度比例、且全部以环向方式逐层缠绕在内衬层外，边缠绕边淋浇树脂进而粘结固化而成；外防护层（3）涂覆固化在增强层的外表面，并起到防水、防腐和防辐射等作用。该复合管即便在管径显著扩大的情况下仍能够很好地保持竹缠绕复合管道整体结构无应力分布缺陷的特点，同时可显著提高如抗压性、环刚度以及长期使用质量稳定性等方面的综合性能。

Description

一种超大口径的竹缠绕复合管及其制造方法 [技术领域]
本发明属于复合管材相关技术领域，更具体地，涉及一种超大口径的竹缠绕复合管及其制造方法。
[背景技术]
目前在国内外多个行业中，均广泛需要使用到各种类型的管材。传统管材主要被划分为金属管材(如无缝钢管、球磨铸铁管等)，塑料管材(如PVC管、HDPE管等)，水泥管材以及玻璃钢管(如夹砂玻璃钢管)等类别，它们各自具备不同的性能特点，同时也呈现不同的优缺点：如无缝钢管的承压能力高、耐高温，易加工，但重量大、易腐蚀，施工困难且使用寿命一般；HDPE管的重量轻、耐腐蚀，便于加工，但耐温性能和承压能力较差、刚度小且容易老化；夹砂玻璃钢管的强度高、耐腐蚀，摩擦系数较小，但在大口径情况下承压能力有限、长期使用可能析出玻璃纤维，同时不利于回收利用，等等。
有鉴于此，本申请的发明人在早期已经提出了利用竹纤维作为主要增强材料、以树脂作为粘结剂，并采用缠绕方式来加工成型的新型生物基管材。例如，CN200910099279.2中公开了一种竹纤维缠绕复合管的制备方法，其中将管材由内到外设置为内衬层、增强层和外防护层，该增强层是由成卷的竹纤维片装在缠绕机上退卷，先经过树脂槽涂上譬如环氧树脂的改性材料，接着缠绕在直管模具的内衬层上最后经固化形成。又如，CN201010301399.9中公开了一种直竹条增强竹复管的制备方法，其中将成卷的连续竹片状在缠绕机上退卷，多条连续竹片先通过竖直槽浸泡树脂，然后环形缠绕在内衬层上成为环向增强层，接着在该环向增强层外铺设帘状直竹条对管道进行加强，外层再缠绕环向增强层，由此经固化形成增强 层并最终在增强层外喷涂形成外防护层。以上这些新型生物基管材的基本原理为充分利用竹纤维的轴向拉伸强度，并在管道结构中形成无应力缺陷分布，相应与常规的各类管材相比，不仅在耐压强度、刚度、重量、防腐和绝缘性能等多项主要指标方面均表现优良，而且原材料为可再生资源，生产过程基本无三废排放，具备低碳环保、节能减排等特色，因而被列入国家重点推广的低碳技术项目目录。
然而，随着竹缠绕复合管材在多个行业和项目的推广和实际应用，进一步的研究表明，对于管道运输之类的场合而言，大口径管材作为其运输过程中的主动脉，为了满足长时期运输使用过程的性能稳定，往往在其关键性能指标和加工制造工艺等方面存在特定的要求。例如，目前常见的塑料管材用于传输应用时其最大口径可达1600mm，但在开发设计过程中，不可回避的关键技术研发要点集中在如何保证其抗快速开裂和长期耐压性能等方面。与此类似地，当面对特定应用场合需要采用大口径甚至超大口径的竹缠绕复合管材的情况下，如何基于上述生物基管材的自身特点来作出针对性设计以便继续保持其独有的性能特点，并从抗弯抗撞击、环刚度、轴向拉伸强度以及避免开裂等方面均满足超大口径管材在加工制造和长期运输运用过程的质量要求，正成为本领域亟需解决的技术问题所在。
[发明内容]
针对现有技术的以上不足或改进需求，本发明提供了一种超大口径的竹缠绕复合管及其制造方法，其中通过对各个关键组件的结构组成和设置方式充分结合超大管径的特定场合来予以考虑和重新设计，尤其是对一些直接影响到该超大口径复合管材在加工制造和使用可靠性等方面的一些重要结构参数进行调整和改进，具体测试表明，其不仅能够有效克服随着管径显著增大所造成的各种不利影响，而且还可确保此超大口径的竹缠绕复合管材长期稳定地保持自身的无应力缺陷分布特性，因而尤其适用于譬如农业灌溉、海水输送、电厂循环水、油气输送、混合砂浆、城市排水排污 等应用场合。
为实现上述目的，按照本发明的一个方面，提供了一种超大口径的竹缠绕复合管，其特征在于，该竹缠绕复合管的内孔直径为1800mm～4000mm，进一步优选为2200mm～3600mm，并且从内到外依次包括内衬层、复合增强层和外防护层；其中：
所述内衬层由浸有胶黏剂的纤维毡或无纺布固化制得，并形成防渗且光滑的内壁；所述复合增强层由粘附有树脂的竹篾帘多层缠绕在所述内衬层外固化而成，该竹篾帘是由多个竹篾片通过编织线连接组成的帘状结构，所有竹篾帘相对于所述内衬层均采用缠绕角为85°～90°的环向方式进行缠绕，并且缠绕总层数被设定为14层以上；此外，所述复合增强层从内到外包括第一增强层和第二增强层，其中该第一增强层的竹篾帘采用环向竹篾帘也即所有竹篾片的长度方向与其所组成的竹篾帘长度方向均保持一致，该第二增强层的竹篾帘则采用轴向竹篾帘也即所有竹篾片的长度方向均与其所组成的竹篾帘宽度方向保持一致，并且该第一增强层的厚度至少占所述增强层总厚度的70％以上；所述外防护层直接涂覆固化在所述第二增强层的外表面，并起到防水防腐和防辐射的作用。
对于本发明的上述构思所形成的技术方案，一方面在制造该超大口径的竹缠绕复合管时，通过将作复合增强层采用多层竹篾帘而不是单独的竹篾片或条与树脂混合进行缠绕，这样不仅有助于树脂在管道径向方向上对相邻竹篾帘的间距以及它们内部的间隙均获得充分和均匀的填充，更重要的是能使得竹篾帘在环向缠绕时获得充分伸展，使其轴向拉伸强度发挥至最大化，同时可有效克服竹篾帘尾端容易翘曲的现象；另一方面，通过将复合增强层分为多层结构且各自采用不同编制方式的竹篾帘逐层加工，特别是对它们的不同厚度占比作出针对性的调整，相应可使得两种不同的竹篾帘起到很好的互补作用，并导致最终缠绕形成的复合增强层即便在管径显著扩大的情况下仍能够很好地保持管道整体结构无应力分布缺陷的特 点，同时提高了竹缠绕复合管道在抗压性、环刚度以及长期使用质量稳定性等方面的性能。
作为本发明的一个改进方案，上述复合增强层优选还包括第三增强层，该第三增强层的竹篾帘同样采用环向竹篾帘也即所有竹篾片的长度方向与其所组成的竹篾帘长度方向均保持一致，然后以缠绕角为85°～90°的环向方式继续缠绕在所述第二增强层的外侧。此外，上述第一增强层和第三增强层的厚度之和进一步被设定为占所述复合增强层总厚度的85％～90％，该第二增强层的厚度被设定为占所述复合增强层总厚度的10％～15％。较多的样品质量测试表明，上述厚度占比的数值范围使得最终制得的复合增强层及复合管材在所需缠绕厚度与整体结构强度之间取得更好的平衡，其不仅有助于复合增强层的抗压性能最优化，而且对于实际加工过程而言无需增加过大层数和造成原材料浪费，对于提高生产效率和质量可控性方面起到明显作用。
作为本发明的另一改进方案，对于组成所述环向竹篾帘中的各个竹篾片而言，其规格参数优选设定如下：长为1500mm～2500mm、宽为4mm～10mm、厚度为0.5mm～1.5mm，并且逐片搭接形成长度大于100m、宽度为20mm～50mm的环向竹篾帘。此外，对于组成所述轴向竹篾帘的各个竹篾片而言，其规格参数优选设定如下：长为20mm～50mm、宽为4mm～10mm、厚度为0.5mm～1.5mm，并且逐片搭接形成长度大于100m、宽度为20mm～50mm的环向竹篾帘。之所以对以上竹篾片及两类竹篾帘的具体规格参数作出以上设计，主要是考虑到它们作为复合增强层中的基础组成部分之一，其所具备的竹纤维尺寸及其排列组合方式均会直接影响到各竹篾片以及竹篾卷的强度尤其是轴向拉伸强度，因此在本专利中将其同样进行了针对性的研究和测试，并设定以上的具体参数规格以便更好地符合超大口径竹缠绕管材的制造和使用要求。
作为本发明的另一改进方案，上述竹篾片的横截面形状优选被加工为 矩形，含水量为10％～20％，并且相邻竹篾片之间的间隙面积为0.09cm2～0.25cm2。通过以上设计，矩形的竹篾片不仅有助于在端面进行搭接，同时在其内外侧面上也可获得更大程度的彼此贴近，相应使得在复合增强层的各个方向上均可充分获取竹纤维的高轴向拉伸强度特性；此外，竹篾片和含水量和间隙面积还会对树脂组分的填充过程起到较大的影响，上述特定规格能够使得树脂更易于渗入到竹篾帘中与其充分结合，进而有助于提高各类增强层的结构强度和抗弯抗撞击等性能。
作为本发明的另一改进方案，上述复合增强层的总厚度被设定为占整体管材壁厚的90％以上，进一步优选为占整体管材壁厚的92％～96％。以此方式，能够充分发挥复合增强层对整个超大口径竹缠绕管承压方面所起到核心作用，并便于对各组成层之间的加工质量控制起到指导作用。
作为本发明的又一改进方案，上述复合增强层中除了竹篾帘和树脂之外，还可添加有生物基填料以及固化剂，其中所述树脂、生物基填料和固化剂这三者之间的质量份数被设定为100:15～25:2～5，并一同混合后淋浇粘附于所述竹篾帘上。此外，所述树脂选自于聚氨酯树脂、酚醛树脂、脲醛树脂或者环氧树脂中的一种；所述生物基填料选自竹、木、麻、秸秆、植物果壳或其他硬质生物材料，并且其平均目数设定为20～100。通过以上设计，包含生物基填料、固化剂的树脂混合物能够促进与竹篾帘以及竹纤维之间的填充和结合，并且上述具体类型和颗粒度的生物基填料与竹纤维之间具备很好的亲和性，进而能够进一步提高复合增强层的结构强度。
作为本发明的又一改进方案，对于上述内衬层而言，其厚度至少为2mm，并优选从内到外包括第一内衬层和第二内衬层，其中该第一内衬层的厚度小于该第二内衬层，并且该第一内衬层的树脂粘附量被设定为大于该第二内衬层。此外，上述内衬层中的的纤维毡或无纺布优选为竹纤维毡或竹纤维无纺布，并且该竹纤维的直径为0.8mm～1.2mm；所述第一内衬层优选采用35g/m2～50g/m2的纤维毡或无纺布，所述第二内衬层优选采用150g/m2～ 300g/m2的纤维毡或无纺布。通过以上涉及内衬层组成结构及重要参数的针对性设计，能够使得该内衬层即便在管径显著增大的情况下也能够保持良好的抗内压和防渗性，同时还有助于与复合增强层之间的充分结合，并降低流体输送的能耗。
按照本发明的另一方面，还相应提供了用于制造超大口径的竹缠绕复合管的方法，其特征在于，该方法包括下列步骤：
(a)竹篾片的剖切加工：将竹材按照以下两种主要规格尺寸剖切加工成多个竹篾片：第一种竹篾片的长为1500mm～2500mm、宽为4mm～10mm、厚度为0.5mm～1.5mm，第二种竹篾片的长为20mm～50mm、宽为4mm～10mm、厚度为0.5mm～1.5mm；然后经脱脂、清洗和脱水处理；
(b)竹篾帘的制备：将所述第一种竹篾片沿其长度逐片搭接、同时沿其宽度方向平行排列，最终编织形成总长度大于100m、宽度为20mm～50mm的环向竹篾帘，并且该环向竹篾帘的整体长度方向与所有竹篾片的长度方向均保持一致；此外，将所述第二种竹篾片沿其宽度逐片搭接，最终编织形成总长度大于100m、20mm～50mm的轴向竹篾帘，并且该轴向竹篾帘的整体宽度方向与所有竹篾片的长度方向均保持一致；
(c)内衬层的制备：在直管模具上用粘附有防腐树脂的纤维毡或无纺布制作厚度至少为2mm的内衬层，并形成防渗且光滑的内壁；
(d)复合增强层的制备：首先将所述环向竹篾帘成卷装在缠绕机上退卷，然后相对于所述内衬层采用缠绕角为85°～90°的环向方式逐层缠绕在直管模具的内衬层上，边缠绕边向竹篾帘淋浇树脂，直至完成所需厚度的第一增强层；接着，将所述轴向竹篾帘同样采用上述环向方式缠绕在该第一增强层的外侧，直至完成所需厚度的第二增强层；然后将所述环向竹篾帘继续采用上述环向方式缠绕在该第二增强层的外侧，直至完成所需厚度的第三增强层；其中，所述第一增强层和第三增强层的厚度之和至少占所述增强层总厚度的80％以上，并且以上两种竹篾帘的缠绕总层数为14层 以上；
(e)外防护层的制备：在所述复合增强层的外表面直接喷涂防腐防水和防辐射材料，最终形成所需超大口径规格的竹缠绕复合管产品。
总体而言，通过本发明所构思的以上技术方案与现有技术相比，主要具备以下的技术优点：
1、本发明首先对作为管材主要组件的复合增强层在其具体结构组成和关键参数组合等多个方面均进行研究和改进，特别是通过将处于增强层内侧和相对外侧的竹篾帘分别在缠绕工艺、厚度占比等关键参数作出针对性的不同设计，这样一方面能够充分发挥竹纤维本身的轴向强度高和韧性强等优势，确保管壁的抗内压和管刚度，另一方面还能够在大口径管壁的多个方向上起到应力相互补充的功能，并显著改善管壁的抗弯抗撞击和避免外部开裂等性能，相应从整体上较好地克服了由于管径增大而可能会在制造和使用等环节产生的不利影响；
2、本发明中还对构成第一至第三增强层基本组成单元的竹篾片、竹篾帘以及与此相配合的树脂和填料等分别在其具体尺寸规格、截面形状、特定选材及粉末目数等参数别作出了针对性设计，由于这些参数同样会对超大口径的竹缠绕复合管的制造及使用环节起到较大的影响，较多的测试表明，按照本发明所设计的上述参数不仅能够高效率、质量可控地制造出所需口径的竹缠绕复合管，而且在长时期使用环境下也能够确保质量和性能稳定性；
3、本发明中将内衬层设计为多层结构，同时对各层的性能规格、组分材质等方面分别作出了针对性设计，以此方式，能够在内衬层的光滑度、抗腐蚀性以及抗应力强度等多方面取得较好的平衡，这样即便当此超大口径的竹缠绕管材用于输送大流量腐蚀性介质的情况下，也不易造成流体输送能耗过大或破损内衬层的现象，并有助于与增强层之间的相互结合强度；
4、本发明的超大口径竹缠绕复合管其加工工艺基本都在常温常压下进 行，便于质量控制且生产过程无三废排放，具备低碳环保、节能减排等特色，所制得的竹缠绕复合管在1800mm～4000mm甚至更大的内孔直径规格下仍能够长期稳定地保持自身的无应力缺陷分布特性，因而可替代各类常规管材并尤其适用于农业灌溉、海水输送、电厂循环水、油气输送、城市排水排污等应用场合。
[附图说明]
图1是按照本发明优选实施方式所设计的具备超大口径的竹缠绕复合管的基本结构剖视图；
图2a是按照本发明所编织形成的环向竹篾帘的结构示意图；
图2b是按照本发明所编织形成的轴向竹篾帘的结构示意图；
图3是按照本发明用于制备超大口径的竹缠绕复合管的工艺方法流程图；
在所有附图中，相同的附图标记用来表示相同的元件或结构，其中：
1-内衬层 2-复合增强层 3-外防护层 21第一增强层 22-第二增强层 210-环向竹篾帘 220-轴向竹篾帘 2101-第一种规格的竹篾片 2201-第二种规格的竹篾片
[具体实施方式]
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。此外，下面所描述的本发明各个实施方式中所涉及到的技术特征只要彼此之间未构成冲突就可以相互组合。
图1是按照本发明优选实施方式所设计的超大口径的竹缠绕复合管的基本结构剖视图。如图1中所示，该竹缠绕复合管的内孔直径为1800mm～4000mm，进一步优选为2200mm～3600mm，并且从内到外主要包括内衬层1、复合增强层2和外防护层3等组件，下面分别对其逐一具体说明。
内衬层1由粘附有防腐树脂的纤维毡或无纺布制成，并形成防渗且光滑的内壁，其主要功能是与待输送的各类介质相接触，并在不被介质所腐蚀和提供必要抗内压强度的前提下，确保该层能够尽可能低摩擦力和低流体输送能耗地来运输介质。
在本发明中，鉴于整个管材的口径大大超出了普通管材的规格，因此可优选将内衬层设计为2层或更多层的结构，具体而言，该内衬层从内到外包括有第一内衬层和第二内衬层，并且将第一内衬层的厚度设计为小于第二内衬层的厚度，同时将第一内衬层的树脂粘附量设计为大于第二内衬层的树脂粘附量。以此方式，处于更内侧的第一内衬层能够加工形成更为光滑的内表面，降低输送介质时的摩擦力和能耗，而处于相对外侧的第二内衬层则对整个内衬层的抗应力强度以及与复合增强层2之间的结合发挥更重要的作用，特别是避免在大口径大流量输送场合下介质对内衬层和整个管材的冲击损坏。此外，该内衬层中也可以采用竹纤维来加工形成纤维毡或无纺布，并且经过较多的对比测试，可选择为竹纤维的直径为0.8mm～1.2mm，第一内衬层采用35g/m2～50g/m2的纤维毡或无纺布，所述第二内衬层采用150g/m2～300g/m2的纤维毡或无纺布。对于整个内衬层的厚度而言，其优选占整体管材壁厚的5％～8％左右。
作为本发明的另一关键组件，复合增强层2对整个超大口径的竹缠绕复合管材的管刚度以及抗内压性能起到核心影响。相应地，在整个管材的口径大大超出了普通管材规格的研发背景下，必需对复合增强层2在其具体结构组成和关键参数组合等方面重点进行研究和改进。
具体而言，在本发明中，该复合增强层由竹篾帘多层缠绕在所述内衬层1外同时通过树脂粘结固化而成，其可以从内到外大致划分为2个或更多不同的组成及功能区域，如图1示范性所示地，即相对贴近内衬层1的第一增强层21和相对远离内衬层1的第二增强层22，其中第一增强层21优选由最为贴近内衬层1的十二层以上的环向竹篾帘及树脂或树脂混合物 共同构成，其相对于内衬层采用缠绕角为85°～90°的环向缠绕方式逐层加工在内衬层上，第二增强层22则继续缠绕在第一增强层21的整个外部，其优选由二层以上的竹篾帘及树脂或树脂混合物共同构成，而且它们在本发明中同样采用的是缠绕角为85°～90°的环向缠绕方式逐层加工。此外，在上述构造的基础上，还可以继续采用环向竹篾帘同样以环向缠绕方式在第二增强层22的外侧设置第三增强层(图中未具体显示)，由此进一步构成环向竹篾帘-轴向竹篾帘-环向竹篾帘的三层复合结构，其中，该第一增强层和第三增强层的厚度被设定为至少占此复合增强层总厚度的80％以上，进一步优选为85％～90％；该第二增强层的厚度占比对应为占所述复合增强层总厚度的10％～15％。
参照图2a和2b，具体显示了所述环向竹篾帘和轴向竹篾帘不同的搭接和编织方式。如图2a中示范性所示，该环向竹篾帘210是将所有第一种规格的竹篾片2101沿其长度方向逐片搭接、同时将少量该第一种规格的竹篾片沿其宽度方向平行排列，最终编织形成总长度大于100m、宽度为20mm～50mm的环向竹篾帘，并且该环向竹篾帘210最重要的特征即在于，其整体长度方向与作为基础组成单元的所有竹篾片的长度方向均保持一致。同样，如图2b中示范性所示，该轴向竹篾帘220是将所有第二种规格的竹篾片2201沿其宽度方向逐片搭接，最终编织形成总长度大于100m、宽度为20mm～50mm的轴向竹篾帘，该轴向竹篾帘220在整体宽度方向上可由单个竹篾片组成，或是少量更短的竹篾片搭接组成，但其最重要的特征即在于，该轴向竹篾帘的整体宽度方向与作为基础组成单元的所有竹篾片的长度方向均保持一致。
以此方式，通过采用多层竹篾帘而不是单独的竹篾片或条与树脂混合进行缠绕，这样不仅有助于树脂在管道径向方向上对相邻竹篾帘的间距以及它们内部的间隙均获得充分和均匀的填充，更重要的是能使得竹篾帘在环向缠绕时获得充分伸展，使其轴向拉伸强度发挥至最大化，同时可有效 克服竹篾帘尾端容易翘曲的现象；另一方面，通过将复合增强层分为多层结构且各自采用不同编制方式，上述层数和厚度占比的第一增强层21(或第一增强层加上第三增强层)能够在内侧更好地充分发挥竹纤维自身的轴向强度高和韧性强等优势，并确保管壁面对大流量介质输送时的抗内压和管刚度特性；与此相配合地，上述层次和厚度占比的第二增强层22能使得应力分布沿着管壁的多个方向更为均匀地分散，并显著改善管壁的抗弯抗撞击及避免外部开裂等现象。相应从整体测试来看，上述竹缠绕复合管即便在管径显著扩大的情况下仍能够很好地保持管道整体结构无应力分布缺陷的特点，同时提高了竹缠绕复合管道在抗压性、环刚度等性能，尤其是能够长期稳定地保证性能的稳定可靠性。
考虑到竹篾片作为复合增强层中最为基础的组成部分之一，它们所具备的竹纤维尺寸及其排列组合方式均会直接影响到各竹篾卷的强度尤其是轴向拉伸强度，因此在本专利中将其同样进行了针对性的研究和设计。按照本发明的另一优选实施例，对于组成所述环向竹篾帘中的各个竹篾片而言，其规格参数优选设定如下：长为1500mm～2500mm、宽为4mm～10mm、厚度为0.5mm～1.5mm，并且逐片搭接形成长度大于100m、宽度为20mm～50mm的环向竹篾帘。此外，对于组成所述轴向竹篾帘的各个竹篾片而言，其规格参数优选设定如下：长为20mm～50mm、宽为4mm～10mm、厚度为0.5mm～1.5mm，并且逐片搭接形成长度大于100m、宽度为20mm～50mm的环向竹篾帘。较多的样品测试表明，上述具体参数规格能够更好地发挥环向竹篾帘以及轴向竹篾帘各自的性能优势，进而使得第一复合层和第二复合层之间的组合能够令人满意地符合超大口径竹缠绕管材的制造和使用等特定场合。此外，作为上述基础上更为深入的优化设计，上述竹篾片的横截面形状优选被加工为矩形，含水量为10％～20％，并且相邻竹篾片之间的间隙面积为0.09cm2～0.25cm2。
按照本发明的另一优选实施例，上述复合增强层的总厚度被设定为占 整体管材壁厚的90％以上，进一步优选为占整体管材壁厚的92％～96％。鉴于该复合增强层在整个管壁中占据了主体的地位，为了从其他重要性能对其结构强度进行适当优化，上述复合增强层中除了树脂和竹篾片这些基本组分之外，还优选可以添加有生物基填料以及固化剂，其中经过实际测试，所述树脂、生物基填料和固化剂这三者之间的质量份数被设定为100:15～25:2～5，并一同混合后淋浇粘附于所述竹篾帘上。此外，所述树脂选自于聚氨酯树脂、酚醛树脂、脲醛树脂或者环氧树脂中的一种；所述生物基填料选自竹、木、麻、秸秆、植物果壳或其他硬质生物材料，并且其平均目数设定为20～100。通过以上设计，包含生物基填料、固化剂的树脂混合物能够促进与竹篾帘以及竹纤维之间的填充和结合，并且上述具体类型和颗粒度的生物基填料与竹纤维之间具备很好的亲和性，进而能够进一步提高复合增强层的整体结构强度和抗内压性能，并且有助于加快复合增强层缠绕加工操作过程中的成型效率和质量可控性。
最后，外防护层3可直接涂覆固化在所述复合增强层2的外表面，并主要起到防水防腐和防辐射等作用。具体而言，该外防护层也可以喷涂为2层或2层以上，譬如可采用环氧树脂、不饱和聚酯树脂或者沥青等材料，并添加防辐射填料，其厚度优选至少为3mm，以便更好地对超大口径的管材在各类恶劣使用环境下起到防护作用。
下面将结合一些具体实施例来更为清楚地解释说明按照本发明的竹缠绕复合管制造工艺及其关键工艺参数设计。
实施例1
将竹材加工按照以下两种规格尺寸剖切加工成多个竹篾片，其中第一种竹篾片的规格尺寸被设定为长1500m、宽8mm、厚度0.5mm，含水率可选择为10％，第二种竹篾片的规格尺寸被设定为长20mm、宽6mm、厚度1mm，含水率可选择为10％，然后经脱脂、清洗和脱水处理备用。
接着，将上述第一种竹篾片沿其长度逐片搭接、同时沿其宽度平行排 列(譬如6个竹篾片)，最终形成总长度为150m、宽度为48mm左右，相邻竹篾片之间的间隙面积为0.09cm2的环向竹篾帘；此外，将上述第二种竹篾片沿其宽度方向逐片搭接，最终编织形成总长度为150m、宽度为20mm，相邻竹篾片之间的间隙面积同样为0.09cm2的的轴向竹篾帘。
接着，在外径为1800mm的经抛光的玻璃钢直管模具上包裹一层脱模薄膜，然后用粘附有防腐树脂的竹纤维无纺布，在管模具上依次制作厚度为2mm、密度为35g/m2的第一内衬层和厚度为3mm、密度为200g/m2的第二内衬层，其中树脂可选择环氧树脂，无纺布中的竹纤维的直径约为1mm，由此形成防渗且光滑的内壁。
然后，待内衬层固化后，将上述两种竹篾帘分别成卷装在缠绕机上退卷，这些竹篾帘会通过装有脲醛树脂的树脂槽并涂敷上浆状的树脂，然后逐层缠绕在直管模具的内衬层上，在整个缠绕过程中，首先采用环向缠绕的方式来加工最初的12层环向竹篾帘，边缠绕边向竹篾帘淋浇树脂，并且控制相应所形成的第一增强层的厚度占复合增强层总厚度的70％，然后继续采用环向缠绕的方式继续缠绕5层轴向竹篾帘，同样是边缠绕边向竹篾帘淋浇树脂，并且控制相应所形成的第二增强层的厚度占复合增强层总厚度的30％。缠绕过程中所共同粘附的树脂可选择为脲醛树脂，最终获得厚度占比占整体管材壁厚的90％的复合增强层。
当所有缠绕操作完毕后，对复合增强层固化形成为管坯，然后脱模处理获得竹缠绕复合管。最后，在管材外面喷涂一层防水防腐功能的不饱和聚酯树脂，厚约3mm，最终加工制得口径为1800mm的竹缠绕复合管产品。
实施例2
将竹材加工按照以下两种规格尺寸剖切加工成多个竹篾片，其中第一种竹篾片的规格尺寸被设定为长2000m、宽8mm、厚度0.5mm，含水率可选择为15％，第二种竹篾片的规格尺寸被设定为长20mm、宽10mm、厚度0.5mm，含水率可选择为15％，然后经脱脂、清洗和脱水处理备用。
接着，将上述第一种竹篾片沿其长度逐片搭接、同时沿其宽度平行排列(譬如6个竹篾片)，最终形成总长度为150m、宽度为48mm左右，相邻竹篾片之间的间隙面积为0.12cm2的环向竹篾帘；此外，将上述第二种竹篾片沿其宽度方向逐片搭接，最终编织形成总长度为150m、宽度为20mm，相邻竹篾片之间的间隙面积同样为0.12cm2的的轴向竹篾帘。
接着，在外径为2200mm的经抛光的玻璃钢直管模具上包裹一层脱模薄膜，然后用粘附有防腐树脂的竹纤维无纺布，在管模具上依次制作厚度为2mm、密度为50g/m2的第一内衬层和厚度为3mm、密度为300g/m2的第二内衬层，其中树脂可选择环氧树脂，无纺布中的竹纤维的直径约为1mm，由此形成防渗且光滑的内壁；
然后，待内衬层固化后，将竹篾帘成卷装在缠绕机上退卷，这些竹篾帘会通过装有脲醛树脂的树脂槽并涂敷上浆状的树脂，然后逐层缠绕在直管模具的内衬层上。在整个缠绕过程中，首先采用环向缠绕的方式来加工最初的16层环向竹篾帘，边缠绕边向竹篾帘淋浇树脂，并且控制相应所形成的第一增强层的厚度占复合增强层总厚度的80％，然后继续采用环向缠绕的方式继续缠绕4层轴向竹篾帘，同样是边缠绕边向竹篾帘淋浇树脂，并且控制相应所形成的第二增强层的厚度占复合增强层总厚度的20％。缠绕过程中所共同粘附的树脂可选择为脲醛树脂并添加有平均目数为20的秸秆粉末和少量固化剂，其中树脂、秸秆粉末和固化剂三者之间的重量份数为100:15:5，最终获得厚度占比占整体管材壁厚的92％的增强层。
当所有缠绕操作完毕后，对增强层固化形成为管坯，然后脱模处理获得竹缠绕复合管。最后，在管材外面喷涂一层防水防腐功能的不饱和聚酯树脂，厚约3mm，最终获得口径为2200mm的竹缠绕复合管。
实施例3
将竹材加工按照以下两种规格尺寸剖切加工成多个竹篾片，其中第一种竹篾片的规格尺寸被设定为长2500m、宽4mm、厚度1mm，含水率可选择 为15％，第二种竹篾片的规格尺寸被设定为长40mm、宽4mm、厚度1mm，含水率可选择为15％，然后经脱脂、清洗和脱水处理备用。
接着，将上述第一种竹篾片沿其长度逐片搭接、同时沿其宽度平行排列(譬如10个竹篾片)，最终形成总长度为150m、宽度为40mm左右，相邻竹篾片之间的间隙面积为0.25cm2的环向竹篾帘；此外，将上述第二种竹篾片沿其宽度方向逐片搭接，最终编织形成总长度为150m、宽度为40mm，相邻竹篾片之间的间隙面积同样为0.25cm2的的轴向竹篾帘。
接着，在外径为2600mm的经抛光的玻璃钢直管模具上包裹一层脱模薄膜，然后用粘附有防腐树脂的竹纤维无纺布，在管模具上依次制作厚度为3mm、密度为50g/m2的第一内衬层和厚度为5mm、密度为300g/m2的第二内衬层，其中树脂可选择环氧树脂，无纺布中的竹纤维的直径约为1.2mm，由此形成防渗且光滑的内壁；
然后，待内衬层固化后，将竹篾帘成卷装在缠绕机上退卷，这些竹篾帘会通过装有酚醛树脂的树脂槽并涂敷上浆状的树脂，然后逐层缠绕在直管模具的内衬层上。在整个缠绕过程中，首先采用环向缠绕的方式来加工最初的24层环向竹篾帘，边缠绕边向竹篾帘淋浇树脂，并且控制相应所形成的第一增强层的厚度达到所需程度，然后继续采用环向缠绕的方式继续缠绕4层轴向竹篾帘，同样是边缠绕边向竹篾帘淋浇树脂，并且控制相应所形成的第二增强层的厚度占复合增强层总厚度的13.3％；然后，继续采用环向方式缠绕2层环向竹篾帘，并控制其所形成的第三增强层和前面已形成的第一增强层的厚度之和共计占复合增强层总厚度的86.7％。
缠绕过程中所共同粘附的树脂可选择为酚醛树脂并添加有平均目数为50的竹粉和少量固化剂，其中树脂、竹粉和固化剂三者之间的重量份数为100:25:5，最终获得厚度占比占整体管材壁厚的95％的增强层。
当所有缠绕操作完毕后，对增强层固化形成为管坯，然后脱模处理获得竹缠绕复合管。最后，在管材外面喷涂一层防水防腐功能的沥青，同时 添加有防辐射剂，厚约5mm，最终制得口径为2600mm的竹缠绕复合管产品。
实施例4
将竹材加工按照以下两种规格尺寸剖切加工成多个竹篾片，其中第一种竹篾片的规格尺寸被设定为长2500m、宽10mm、厚度1.5mm，含水率可选择为10％，第二种竹篾片的规格尺寸被设定为长50mm、宽8mm、厚度1.5mm，含水率可选择为10％，然后经脱脂、清洗和脱水处理备用。
接着，将上述第一种竹篾片沿其长度逐片搭接、同时沿其宽度平行排列(譬如5个竹篾片)，最终形成总长度为200m、宽度为50mm左右，相邻竹篾片之间的间隙面积为0.22cm2的环向竹篾帘；此外，将上述第二种竹篾片沿其宽度方向逐片搭接，最终编织形成总长度为200m、宽度为50mm，相邻竹篾片之间的间隙面积同样为0.22cm2的的轴向竹篾帘。
在外径为3600mm的经抛光的玻璃钢直管模具上包裹一层脱模薄膜，然后用粘附有防腐树脂的竹纤维无纺布，在管模具上依次制作厚度为3mm、密度为50g/m2的第一内衬层和厚度为5mm、密度为250g/m2的第二内衬层，其中树脂可选择环氧树脂，无纺布中的竹纤维的直径约为1.2mm，由此形成防渗且光滑的内壁。
然后，待内衬层固化后，将竹篾帘成卷装在缠绕机上退卷，这些竹篾帘会通过装有环氧树脂的树脂槽并涂敷上浆状的树脂，然后逐层缠绕在直管模具的内衬层上。在整个缠绕过程中，首先采用环向缠绕的方式来加工最初的32层环向竹篾帘，边缠绕边向竹篾帘淋浇树脂使得形成所需厚度，然后继续采用环向缠绕的方式继续缠绕4层轴向竹篾帘，同样是边缠绕边向竹篾帘淋浇树脂，并且控制相应所形成的第二增强层的厚度占复合增强层总厚度的10％。然后，继续以环向方式缠绕4层的环向竹篾帘，并控制其所形成的第三增强层和前面已形成的第一和第三增强层的厚度之和共计占复合增强层总厚度的90％。
缠绕过程中所共同粘附的树脂可选择为环氧树脂并添加有平均目数为 100的麻粉末和少量固化剂，其中树脂、麻粉末和固化剂三者之间的重量份数为100:20:3，最终获得厚度占比占整体管材壁厚的94％的增强层。
当所有缠绕操作完毕后，对增强层固化形成为管坯，然后脱模处理获得竹缠绕复合管。最后，在管材外面喷涂一层防水防腐功能的环氧树脂，厚约5mm，最终制得口径为3600mm的竹缠绕复合管产品。
实施例5
将竹材加工按照以下两种规格尺寸剖切加工成多个竹篾片，其中第一种竹篾片的规格尺寸被设定为长1500m、宽6mm、厚度0.5mm，含水率可选择为20％，第二种竹篾片的规格尺寸被设定为长30mm、宽6mm、厚度0.5mm，含水率可选择为10％，然后经脱脂、清洗和脱水处理备用。
接着，将上述第一种竹篾片沿其长度逐片搭接、同时沿其宽度平行排列(譬如5个竹篾片)，最终形成总长度为200m、宽度为30mm左右，相邻竹篾片之间的间隙面积为0.09cm2的环向竹篾帘；此外，将上述第二种竹篾片沿其宽度方向逐片搭接，最终编织形成总长度为200m、宽度为30mm，相邻竹篾片之间的间隙面积同样为0.09cm2的的轴向竹篾帘。
接着，在外径为2600mm的经抛光的玻璃钢直管模具上包裹一层脱模薄膜，然后用粘附有防腐树脂的竹纤维无纺布，在管模具上依次制作厚度为5mm、密度为50g/m2的第一内衬层和厚度为7mm、密度为300g/m2的第二内衬层，其中树脂可选择不饱和聚酯树脂，无纺布中的竹纤维的直径约为1.2mm，由此形成防渗且光滑的内壁。
然后，待内衬层固化后，将竹篾帘成卷装在缠绕机上退卷，这些竹篾帘会通过装有环氧树脂的树脂槽并涂敷上浆状的树脂，然后逐层缠绕在直管模具的内衬层上。在整个缠绕过程中，首先采用环向缠绕的方式来加工最初的32层环向竹篾帘，边缠绕边向竹篾帘淋浇树脂并控制达到所需厚度，然后继续采用环向缠绕的方式继续缠绕4层轴向竹篾帘，同样是边缠绕边向竹篾帘淋浇树脂，并且控制相应所形成的第二增强层的厚度占复合增强 层总厚度的10％；然后继续以环向方式在第二增强层的外侧采用环向竹篾帘来缠绕4层以制得第三增强层，并且控制该第三和第一增强层的厚度之和占复合增强层总厚度的90％。缠绕过程中所共同粘附的树脂可选择为环氧树脂并添加有平均目数为50的椰壳粉末和少量固化剂，其中树脂、椰壳粉末和固化剂三者之间的重量份数为100:15:2，最终获得厚度占比占整体管材壁厚的90％的增强层。
当所有缠绕操作完毕后，对增强层固化形成为管坯，然后脱模处理获得竹缠绕复合管。最后，在管材外面喷涂一层防水防腐功能的沥青，并添加防辐射剂，厚约5mm，最终制得口径为2600mm的竹缠绕复合管产品。
实施例6
将竹材加工按照以下两种规格尺寸剖切加工成多个竹篾片，其中第一种竹篾片的规格尺寸被设定为长2000m、宽10mm、厚度1.5mm，含水率可选择为10％，第二种竹篾片的规格尺寸被设定为长50mm、宽10mm、厚度1.5mm，含水率可选择为10％，然后经脱脂、清洗和脱水处理备用。
接着，将上述第一种竹篾片沿其长度逐片搭接、同时沿其宽度平行排列(譬如5个竹篾片)，最终形成总长度为250m、宽度为50mm左右，相邻竹篾片之间的间隙面积为0.25cm2的环向竹篾帘；此外，将上述第二种竹篾片沿其宽度方向逐片搭接，最终编织形成总长度为250m、宽度为50mm，相邻竹篾片之间的间隙面积同样为0.25cm2的的轴向竹篾帘。
在外径为3600mm的经抛光的玻璃钢直管模具上包裹一层脱模薄膜，然后用粘附有防腐树脂的竹纤维无纺布，在管模具上依次制作厚度为3mm、密度为50g/m2的第一内衬层和厚度为5mm、密度为200g/m2的第二内衬层，其中树脂可选择环氧树脂，无纺布中的竹纤维的直径约为0.8mm，由此形成防渗且光滑的内壁；
然后，待内衬层固化后，将竹篾帘成卷装在缠绕机上退卷，这些竹篾帘会通过装有脲醛树脂的树脂槽并涂敷上浆状的树脂，然后逐层缠绕在直 管模具的内衬层上。在整个缠绕过程中，首先采用环向缠绕的方式来加工最初的26层环向竹篾帘，边缠绕边向竹篾帘淋浇树脂，并且控制相应所形成的第一增强层的厚度占复合增强层总厚度的87％左右，然后继续采用环向缠绕的方式继续缠绕4层轴向竹篾帘，同样是边缠绕边向竹篾帘淋浇树脂，并且控制相应所形成的第二增强层的厚度占复合增强层总厚度的13％。缠绕过程中所共同粘附的树脂可选择为脲醛树脂并添加有平均目数为20的竹粉和少量固化剂，其中树脂、竹粉和固化剂三者之间的重量份数为100:25:5，最终获得厚度占比占整体管材壁厚的90％的增强层。
当所有缠绕操作完毕后，对增强层固化形成为管坯，然后脱模处理获得竹缠绕复合管。最后，在管材外面喷涂一层防水防腐功能的不饱和聚酯树脂，厚约3mm，最终制得口径为3600mm的竹缠绕复合管产品。
实施例7
将竹材加工按照以下两种规格尺寸剖切加工成多个竹篾片，其中第一种竹篾片的规格尺寸被设定为长2000m、宽5mm、厚度1.5mm，含水率可选择为12％，第二种竹篾片的规格尺寸被设定为长20mm、宽6mm、厚度1.5mm，含水率可选择为12％，然后经脱脂、清洗和脱水处理备用。
接着，将上述第一种竹篾片沿其长度逐片搭接、同时沿其宽度平行排列(譬如4个竹篾片)，最终形成总长度为300m、宽度为20mm左右，相邻竹篾片之间的间隙面积为0.09cm2的环向竹篾帘；此外，将上述第二种竹篾片沿其宽度方向逐片搭接，最终编织形成总长度为300m、宽度为20mm，相邻竹篾片之间的间隙面积同样为0.09cm2的的轴向竹篾帘。
在外径为4000mm的经抛光的玻璃钢直管模具上包裹一层脱模薄膜，然后用粘附有防腐树脂的竹纤维无纺布，在管模具上依次制作厚度为3mm、密度为50g/m2的第一内衬层和厚度为5mm、密度为200g/m2的第二内衬层，其中树脂可选择环氧树脂，无纺布中的竹纤维的直径约为1mm，由此形成防渗且光滑的内壁。
然后，待内衬层固化后，将竹篾帘成卷装在缠绕机上退卷，这些竹篾帘会通过装有脲醛树脂的树脂槽并涂敷上浆状的树脂，然后逐层缠绕在直管模具的内衬层上。在整个缠绕过程中，首先采用环向缠绕的方式来加工最初的40层环向竹篾帘，边缠绕边向竹篾帘淋浇树脂，并且控制相应所形成的第一增强层达到所需厚度，然后继续采用环向缠绕的方式继续缠绕5层轴向竹篾帘，同样是边缠绕边向竹篾帘淋浇树脂，并且控制相应所形成的第二增强层的厚度占复合增强层总厚度的10％，然后继续以环向方式采用环向竹篾帘在第二增强层的外侧缠绕5层以形成第三增强层，并控制使得该第三和第一增强层的厚度之和占复合增强层总厚度的90％左右。缠绕过程中所共同粘附的树脂可选择为脲醛树脂并添加有平均目数为100的秸秆粉末和少量固化剂，其中树脂、秸秆粉末和固化剂三者之间的重量份数为100:15:5，最终获得厚度占比占整体管材壁厚的92％的增强层。
当所有缠绕操作完毕后，对增强层固化形成为管坯，然后脱模处理获得竹缠绕复合管。最后，在管材外面喷涂一层防水防腐功能的不饱和聚酯树脂，厚约3mm，最终制得口径为4000mm的竹缠绕复合管产品。
实施例8
将竹材加工按照以下两种规格尺寸剖切加工成多个竹篾片，其中第一种竹篾片的规格尺寸被设定为长1500m、宽4mm、厚度1mm，含水率可选择为18％，第二种竹篾片的规格尺寸被设定为长40mm、宽6mm、厚度1mm，含水率可选择为18％，然后经脱脂、清洗和脱水处理备用。
接着，将上述第一种竹篾片沿其长度逐片搭接、同时沿其宽度平行排列(譬如10个竹篾片)，最终形成总长度为120m、宽度为40mm左右，相邻竹篾片之间的间隙面积为0.18cm2的环向竹篾帘；此外，将上述第二种竹篾片沿其宽度方向逐片搭接，最终编织形成总长度为120m、宽度为40mm，相邻竹篾片之间的间隙面积同样为0.18cm2的的轴向竹篾帘。
在外径为2200mm的经抛光的玻璃钢直管模具上包裹一层脱模薄膜，然 后用粘附有防腐树脂的竹纤维无纺布，在管模具上依次制作厚度为2mm、密度为35g/m2的第一内衬层和厚度为4mm、密度为200g/m2的第二内衬层，其中树脂可选择环氧树脂，无纺布中的竹纤维的直径约为0.8mm，由此形成防渗且光滑的内壁。
然后，待内衬层固化后，将竹篾帘成卷装在缠绕机上退卷，这些竹篾帘会通过装有环氧树脂的树脂槽并涂敷上浆状的树脂，然后逐层缠绕在直管模具的内衬层上。在整个缠绕过程中，首先采用环向缠绕的方式来加工最初的12层环向竹篾帘，边缠绕边向竹篾帘淋浇树脂，并且控制相应所形成的第一增强层的厚度达到所需程度，然后继续采用环向缠绕的方式继续缠绕2层轴向竹篾帘，同样是边缠绕边向竹篾帘淋浇树脂，并且控制相应所形成的第二增强层的厚度占复合增强层总厚度的12.5％；然后，继续采用环向方式在第二增强层的外侧采用环向竹篾帘缠绕2层以形成第三增强层，并且控制该第三和第一增强层的厚度之和占复合增强层总厚度的87.5％左右。缠绕过程中所共同粘附的树脂可选择为环氧树脂并添加有平均目数为80的木粉末和少量固化剂，其中树脂、木粉末和固化剂三者之间的重量份数为100:20:5，最终获得厚度占比占整体管材壁厚的96％的增强层。
当所有缠绕操作完毕后，对增强层固化形成为管坯，然后脱模处理获得竹缠绕复合管。最后，在管材外面喷涂一层防水防腐功能的不饱和聚酯树脂，厚约3mm，最终制得口径为2200mm的竹缠绕复合管产品。
本领域的技术人员容易理解，以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种超大口径的竹缠绕复合管，其特征在于，该竹缠绕复合管的内孔直径为1800mm～4000mm，进一步优选为2200mm～3600mm，并且从内到外依次包括内衬层、复合增强层和外防护层，其中：
    所述内衬层由浸有胶黏剂的纤维毡或无纺布固化制得，并形成防渗且光滑的内壁；所述复合增强层由粘附有树脂的竹篾帘多层缠绕在所述内衬层外固化而成，该竹篾帘是由多个竹篾片通过编织线连接组成的帘状结构，所有竹篾帘相对于所述内衬层均采用缠绕角为85°～90°的环向方式进行缠绕，并且缠绕总层数被设定为14层以上；此外，所述复合增强层从内到外包括第一增强层和第二增强层，其中该第一增强层的竹篾帘采用环向竹篾帘也即所有竹篾片的长度方向与其所组成的竹篾帘长度方向均保持一致，该第二增强层的竹篾帘则采用轴向竹篾帘也即所有竹篾片的长度方向均与其所组成的竹篾帘宽度方向保持一致，并且该第一增强层的厚度至少占所述增强层总厚度的70％以上；所述外防护层直接涂覆固化在所述复合增强层的外表面，并起到防水防腐和防辐射的作用。
  2. 如权利要求1所述的超大口径的竹缠绕复合管，其特征在于，上述复合增强层优选还包括第三增强层，该第三增强层的竹篾帘同样采用环向竹篾帘也即所有竹篾片的长度方向与其所组成的竹篾帘长度方向均保持一致，然后以缠绕角为85°～90°的环向方式继续缠绕在所述第二增强层的外侧。
  3. 如权利要求2所述的超大口径的竹缠绕复合管，其特征在于，该第一增强层和第三增强层的厚度之和进一步被设定为占所述复合增强层总厚度的85％～90％，该第二增强层的厚度被设定为占所述复合增强层总厚度的10％～15％。
  4. 如权利要求1-3任意一项所述的超大口径的竹缠绕复合管，其特征 在于，对于组成所述环向竹篾帘中的各个竹篾片而言，其规格参数优选设定如下：长为1500mm～2500mm、宽为4mm～10mm、厚度为0.5mm～1.5mm，并且逐片搭接形成长度大于100m、宽度为20mm～50mm的环向竹篾帘。
  5. 如权利要求4所述的超大口径的竹缠绕复合管，其特征在于，对于组成所述轴向竹篾帘的各个竹篾片而言，其规格参数优选设定如下：长为20mm～50mm、宽为4mm～10mm、厚度为0.5mm～1.5mm，并且逐片搭接形成长度大于100m、宽度为20mm～50mm的环向竹篾帘。
  6. 如权利要求1-5任意一项所述的超大口径的竹缠绕复合管，其特征在于，上述竹篾片的横截面形状优选被加工为矩形，其含水量为10％～20％，并且相邻竹篾片之间的间隙面积为0.09cm2～0.25cm2。
  7. 如权利要求1-6任意一项所述的超大口径的竹缠绕复合管，其特征在于，上述复合增强层的总厚度被设定为占整体管材壁厚的90％以上，进一步优选为占整体管材壁厚的92％～96％。
  8. 如权利要去1-7任意一项所述的超大口径的竹缠绕复合管，其特征在于上述复合增强层中除了竹篾帘和树脂之外，还添加有生物基填料以及固化剂，其中所述树脂、生物基填料和固化剂这三者之间的质量份数被设定为100:15～25:2～5，并一同混合后淋浇粘附于所述竹篾帘上。
  9. 如权利要求1-8任意一项所述的超大口径的竹缠绕复合管，其特征在于，对于上述内衬层而言，其厚度至少为2mm，并优选从内到外包括第一内衬层和第二内衬层，其中该第一内衬层的厚度小于该第二内衬层，并且该第一内衬层的树脂粘附量被设定为大于该第二内衬层；此外，所述第一内衬层优选采用35g/m2～50g/m2的竹纤维毡或竹纤维无纺布，所述第二内衬层优选采用150g/m2～300g/m2的竹纤维毡或竹纤维无纺布。
  10. 一种用于制造超大口径的竹缠绕复合管的方法，该竹缠绕复合管的内孔直径为1800mm～4000mm，其特征在于，该方法包括下列步骤：
    (a)竹篾片的剖切加工：将竹材按照以下两种主要规格尺寸剖切加工 成多个竹篾片：第一种竹篾片的长为1500mm～2500mm、宽为4mm～10mm、厚度为0.5mm～1.5mm，第二种竹篾片的长为20mm～50mm、宽为4mm～10mm、厚度为0.5mm～1.5mm；然后经脱脂、清洗和脱水处理；
    (b)竹篾帘的制备：将所述第一种竹篾片沿其长度逐片搭接、同时沿其宽度方向平行排列，最终编织形成总长度大于100m、宽度为20mm～50mm的环向竹篾帘，并且该环向竹篾帘的整体长度方向与所有竹篾片的长度方向均保持一致；此外，将所述第二种竹篾片沿其宽度逐片搭接，最终编织形成总长度大于100m、20mm～50mm的轴向竹篾帘，并且该轴向竹篾帘的整体宽度方向与所有竹篾片的长度方向均保持一致；
    (c)内衬层的制备：在直管模具上用粘附有防腐树脂的纤维毡或无纺布制作厚度至少为2mm的内衬层，并形成防渗且光滑的内壁；
    (d)复合增强层的制备：首先将所述环向竹篾帘成卷装在缠绕机上退卷，然后相对于所述内衬层采用缠绕角为85°～90°的环向方式逐层缠绕在直管模具的内衬层上，边缠绕边向竹篾帘淋浇树脂，直至完成所需厚度的第一增强层；接着，将所述轴向竹篾帘同样采用上述环向方式缠绕在该第一增强层的外侧，直至完成所需厚度的第二增强层；然后将所述环向竹篾帘继续采用上述环向方式缠绕在该第二增强层的外侧，直至完成所需厚度的第三增强层；其中，所述第一增强层和第三增强层的厚度之和至少占所述增强层总厚度的80％以上，并且以上两种竹篾帘的缠绕总层数为14层以上；
    (e)外防护层的制备：在所述复合增强层的外表面直接喷涂防腐防水和防辐射材料，最终形成所需超大口径规格的竹缠绕复合管产品。
PCT/CN2016/109888 2016-04-13 2016-12-14 一种超大口径的竹缠绕复合管及其制造方法 WO2017177708A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610229360.8A CN105715881B (zh) 2016-04-13 2016-04-13 一种超大口径的竹缠绕复合管及其制造方法
CN201610229360.8 2016-04-13

Publications (1)

Publication Number Publication Date
WO2017177708A1 true WO2017177708A1 (zh) 2017-10-19

Family

ID=56159963

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/109888 WO2017177708A1 (zh) 2016-04-13 2016-12-14 一种超大口径的竹缠绕复合管及其制造方法

Country Status (2)

Country Link
CN (1) CN105715881B (zh)
WO (1) WO2017177708A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108278424A (zh) * 2018-02-09 2018-07-13 安徽华奇管业有限公司 一种带有承插式接口的抗菌耐腐竹缠绕复合压力管
CN111287489A (zh) * 2020-03-31 2020-06-16 北京林业大学 加固式开裂原竹及开裂原竹的加固方法
WO2021165354A1 (en) 2020-02-19 2021-08-26 Basf Se Composite pole composed of a bamboo cane as core and a continuous fiber reinforced polymer layer
CN113878681A (zh) * 2020-12-17 2022-01-04 龙竹科技集团股份有限公司 一种竹吸管加工方法

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105715881B (zh) * 2016-04-13 2019-04-05 浙江鑫宙竹基复合材料科技有限公司 一种超大口径的竹缠绕复合管及其制造方法
CN108018876B (zh) * 2016-10-31 2020-05-19 浙江鑫宙竹基复合材料科技有限公司 一种竹复合综合管廊
CN108018872A (zh) * 2016-10-31 2018-05-11 浙江鑫宙竹基复合材料科技有限公司 一种用于竹复合综合管廊的直管及包括该直管的管廊
CN108018874A (zh) * 2016-10-31 2018-05-11 浙江鑫宙竹基复合材料科技有限公司 用于竹复合综合管廊的可拼接管件及包括该管件的管廊
CN108005109B (zh) * 2016-10-31 2020-09-22 浙江鑫宙竹基复合材料科技有限公司 一种可容纳多类型管道的竹复合综合管廊
CN108018875B (zh) * 2016-10-31 2020-09-22 浙江鑫宙竹基复合材料科技有限公司 一种管廊用内嵌式支撑构件和管廊装配的结构
CN106592869A (zh) * 2017-01-17 2017-04-26 南京林业大学 一种竹复合管－钢管内外约束混凝土组合结构
CN106760216A (zh) * 2017-01-17 2017-05-31 南京林业大学 一种竹材复合管约束钢骨混凝土组合结构
CN107244328A (zh) * 2017-06-06 2017-10-13 浙江鑫宙竹基复合材料科技有限公司 一种用于轨道交通车辆的竹缠绕车体及其制备方法
CN107300045A (zh) * 2017-08-30 2017-10-27 西南石油大学 一种复合增强缠绕压力管
CN108374519A (zh) * 2018-04-07 2018-08-07 南京林业大学 一种竹材约束集束式原竹结构
CN108332041A (zh) * 2018-04-16 2018-07-27 西华大学 一种天然气气瓶的制造方法以及天然气气瓶
CN109571689A (zh) * 2018-11-21 2019-04-05 鑫竹海(山东)管道制造有限公司 一种竹缠绕复合雨污水管生产工艺
CN112238514A (zh) * 2019-07-19 2021-01-19 厦门市禹宙竹基复合材料科技有限公司 用于竹缠绕管道管廊复合材料产品的竹篾帘及其编织方法
CN111572647B (zh) * 2020-04-30 2022-04-26 浙江鑫宙竹基复合材料科技有限公司 一种竹缠绕厢式货车车体及其制备方法
CN111959008B (zh) * 2020-07-09 2022-03-11 张毅 高强度竹纤维缠绕复合管的制备方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008114455A (ja) * 2006-11-02 2008-05-22 Fujisawa Denko Kk 再生ｐｅｔ擬竹の生産方法及びこれによる再生ｐｅｔ擬竹
CN101571213A (zh) * 2009-06-04 2009-11-04 芜湖圣弗兰玻璃钢有限公司 竹纤维缠绕复合管的制备方法
CN201651576U (zh) * 2010-02-09 2010-11-24 芜湖圣弗兰玻璃钢有限公司 直竹条增强竹复管
CN101947803A (zh) * 2010-02-09 2011-01-19 芜湖圣弗兰玻璃钢有限公司 直竹条增强竹复管的制备方法
US20120031616A1 (en) * 2010-08-03 2012-02-09 Hall David R Cylindrical Truss Structure Reinforced Pipe
CN204665313U (zh) * 2015-05-05 2015-09-23 浙江鑫宙竹基复合材料科技有限公司 竹缠绕复合烟囱
CN105715881A (zh) * 2016-04-13 2016-06-29 浙江鑫宙竹基复合材料科技有限公司 一种超大口径的竹缠绕复合管及其制造方法
CN205578938U (zh) * 2016-04-13 2016-09-14 浙江鑫宙竹基复合材料科技有限公司 一种超大口径的竹缠绕复合管

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2607503Y (zh) * 2003-04-04 2004-03-24 吴懋川 一种复合管道
CN201434160Y (zh) * 2009-06-04 2010-03-31 芜湖圣弗兰玻璃钢有限公司 竹纤维缠绕复合管
CN102218836B (zh) * 2011-01-30 2013-09-25 刘伟 一种使用预制件制造大型复合材料管状制品的方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008114455A (ja) * 2006-11-02 2008-05-22 Fujisawa Denko Kk 再生ｐｅｔ擬竹の生産方法及びこれによる再生ｐｅｔ擬竹
CN101571213A (zh) * 2009-06-04 2009-11-04 芜湖圣弗兰玻璃钢有限公司 竹纤维缠绕复合管的制备方法
CN201651576U (zh) * 2010-02-09 2010-11-24 芜湖圣弗兰玻璃钢有限公司 直竹条增强竹复管
CN101947803A (zh) * 2010-02-09 2011-01-19 芜湖圣弗兰玻璃钢有限公司 直竹条增强竹复管的制备方法
US20120031616A1 (en) * 2010-08-03 2012-02-09 Hall David R Cylindrical Truss Structure Reinforced Pipe
CN204665313U (zh) * 2015-05-05 2015-09-23 浙江鑫宙竹基复合材料科技有限公司 竹缠绕复合烟囱
CN105715881A (zh) * 2016-04-13 2016-06-29 浙江鑫宙竹基复合材料科技有限公司 一种超大口径的竹缠绕复合管及其制造方法
CN205578938U (zh) * 2016-04-13 2016-09-14 浙江鑫宙竹基复合材料科技有限公司 一种超大口径的竹缠绕复合管

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108278424A (zh) * 2018-02-09 2018-07-13 安徽华奇管业有限公司 一种带有承插式接口的抗菌耐腐竹缠绕复合压力管
WO2021165354A1 (en) 2020-02-19 2021-08-26 Basf Se Composite pole composed of a bamboo cane as core and a continuous fiber reinforced polymer layer
CN111287489A (zh) * 2020-03-31 2020-06-16 北京林业大学 加固式开裂原竹及开裂原竹的加固方法
CN113878681A (zh) * 2020-12-17 2022-01-04 龙竹科技集团股份有限公司 一种竹吸管加工方法
CN113878681B (zh) * 2020-12-17 2023-05-23 龙竹科技集团股份有限公司 一种竹吸管加工方法

Also Published As

Publication number Publication date
CN105715881B (zh) 2019-04-05
CN105715881A (zh) 2016-06-29

Similar Documents

Publication Publication Date Title
WO2017177708A1 (zh) 一种超大口径的竹缠绕复合管及其制造方法
WO2017177709A1 (zh) 一种小口径的竹缠绕复合管及其制造方法
WO2017133328A1 (zh) 一种秸秆竹缠绕复合管及其制备方法
CA2927542C (en) Thermosetting bamboo sand composite pressure pipe
WO2017097250A1 (zh) 一种竹缠绕复合管的内衬层及其制备方法
WO2016110139A1 (zh) 一种热固型竹木复合管
CN106760211B (zh) 一种竹材－钢复合管混凝土组合结构
WO2017012214A1 (zh) 麻缠绕复合管
CN205350604U (zh) 一种秸秆竹缠绕复合管
CN104421572A (zh) 一种耐腐蚀耐高温玻璃钢管
CN205578938U (zh) 一种超大口径的竹缠绕复合管
CN205578941U (zh) 一种小口径的竹缠绕复合管
CN104746494A (zh) 中空夹层frp-钢管海砂再生混凝土构件
CN204665313U (zh) 竹缠绕复合烟囱
CN202674573U (zh) 一种有关纤维编织拉挤成型的加筋管
WO2018076490A1 (zh) 一种用于竹复合综合管廊的直管及包括该直管的管廊
CN204201304U (zh) 高强度玻璃钢管道
CN103343845B (zh) 一种连续缠绕玻璃钢管
CN108119705B (zh) 一种异径竹缠绕管结构及其制备方法
WO2018076493A1 (zh) 用于竹复合综合管廊的可拼接管件及包括该管件的管廊
CN202561278U (zh) 一种有关连续拉织成型的玻璃钢加筋管
CN212131563U (zh) 竹纤维与玄武岩纤维缠绕复合管
CN111550614A (zh) 一种核电高刚度直埋玻璃钢管道及其制作方法
CN212776005U (zh) 一种pvc增强的玻纤编织拉挤成型玻璃钢管材
CN211315384U (zh) 一种竹麻缠绕复合压力管

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16898519

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 19.02.2019)

122 Ep: pct application non-entry in european phase

Ref document number: 16898519

Country of ref document: EP

Kind code of ref document: A1