CN105715881A

CN105715881A - Ultra-large-diameter bamboo winding composite tube and manufacturing method thereof

Info

Publication number: CN105715881A
Application number: CN201610229360.8A
Authority: CN
Inventors: 叶柃
Original assignee: Zhejiang Xinzhou Bamboo Based Composites Technology Co Ltd
Current assignee: Zhejiang Xinzhou Bamboo Based Composites Technology Co Ltd
Priority date: 2016-04-13
Filing date: 2016-04-13
Publication date: 2016-06-29
Anticipated expiration: 2036-04-13
Also published as: WO2017177708A1; CN105715881B

Abstract

The invention belongs to the related field of composite tubes, and discloses an ultra-large-diameter bamboo winding composite tube. The bamboo winding composite tube comprises a lining layer, a composite strengthening layer and an outer protection layer from inside to outside, and the lining layer is made of fiber blankets or non-woven fabrics with anticorrosive resin in an adhesion manner; the composite strengthening layer is formed in a manner that two different types of bamboo skin curtains are wound outside the lining layer in a layer-by-layer manner according to the proper layer number and the thickness proportion wholly in the ring direction, the bamboo skin curtains are sprayed with the resin in a liquid-leaching manner while winding is carried out, and then bonding curing is carried out; and the outer protection layer is cured on the outer surface of the strengthening layer in a coating manner, and the effects of water prevention, corrosion prevention, radiation prevention and the like are achieved. The invention further discloses a corresponding manufacturing method. Through the ultra-large-diameter bamboo winding composite tube and the manufacturing method, even under the tube diameter obvious expanding condition, the characteristic that the whole structure of the bamboo winding composite tube is free of stress distribution defect can be well kept, and meanwhile comprehensive properties of pressure resistance, ring stiffness, long-term use quality stability and the like can be obviously improved.

Description

The bamboo coiled composite tube of a kind of super large caliber and manufacture method thereof

Technical field

The invention belongs to composite pipe correlative technology field, more particularly, to bamboo coiled composite tube and the manufacture method thereof of a kind of super large caliber.

Background technology

In current multiple industries at home and abroad, equal widespread need uses various types of tubing.Traditional piping material is largely divided into metal pipe material (such as seamless steel pipe, nodular cast iron pipe etc.), plastic pipe (such as pvc pipe, HDPE pipe etc.), the classifications such as materials used for cement pipes and glass reinforced plastic pipe (such as RPMP), each of which possesses different performance characteristics, also present different pluses and minuses: the bearing capacity such as seamless steel pipe is high, high temperature resistant simultaneously, easily processing, but weight is big, perishable, and constructional difficulties and service life are general；HDPE pipe lightweight, corrosion-resistant, it is simple to processing, but heat resistance and bearing capacity is poor, rigidity is little and easily aging；The intensity of RPMP is high, corrosion-resistant, and coefficient of friction is less, but in heavy caliber situation, bearing capacity is limited, life-time service is likely to precipitate out glass fibre, is unfavorable for recycling simultaneously, etc..

In view of this, present inventor has been proposed for utilizing bamboo fibre as main reinforcing material, using resin as binding agent in early days, and adopts canoe to carry out the new bio base tube material of machine-shaping.Such as, the preparation method of a kind of bamboo fiber winding composite tube disclosed in CN200910099279.2, wherein tubing is set to from inside to outside inner liner, enhancement layer and external protection coating, this enhancement layer is to be contained on wrapping machine debatching by the bamboo fibre sheet of rolling, first pass through resin storage tank and coat the material modified of such as epoxy resin, be then wrapped on the inner liner of straight tube mould last cured formation.And for example, the preparation method that disclosed in CN201010301399.9, a kind of straight bamboo cane strengthens the multiple pipe of bamboo, wherein by continuous bamboo chip shape debatching on wrapping machine of rolling, a plurality of continuous bamboo chip first passes through vertical slots and soaks resin, then ring-wound becomes hoop enhancement layer on inner liner, then laying the straight bamboo cane of curtain shape outside this hoop enhancement layer pipeline is strengthened, outer layer is wound around hoop enhancement layer again, and thus cured formation enhancement layer is also final forms external protection coating at enhancement layer trypsin method.The ultimate principle of the above new bio base tube material is make full use of the axial tensile strength of bamboo fibre, and in pipeline configuration, form unstressed defect distribution, compared with corresponding with conventional all kinds of tubing, not only all show excellent in the multinomial leading indicators such as compressive resistance, rigidity, weight, anticorrosion and insulating properties, and raw material is Renewable resource, the basic three-waste free discharge of production process, possess the characteristic such as low-carbon environment-friendly, energy-saving and emission-reduction, thus be put into the low-carbon technology project directory that state key is promoted.

But, along with bamboo coiled composite tube material is in the popularization of multiple industries and project and practical application, further investigations have shown that, for the occasion of pipeline transportation etc, heavy caliber pipe is as the aorta in its transportation, in order to meet the stable performance transporting use procedure over a long time, in its Key Performance Indicator and process for machining and manufacturing etc., often there is specific requirement.Such as, plastic pipe common at present is used for transmitting during application its maximum caliber up to 1600mm, but in development and Design process, unavoidable key technology research and development main points concentrate on aspects such as how ensureing its resistance to rapid cracking and long-term pressure performance.Similarly, when needing, in the face of certain applications, the bamboo coiled composite tube material adopting heavy caliber even super large caliber, how the own characteristic based on above-mentioned bio-based tubing makes targeted design to continue to keep its exclusive performance characteristics, and from bending resistance impact resistance, ring stiffness, axial tensile strength and avoid the aspects such as cracking to be satisfied by ultra-large caliber pipe material at processing and manufacturing and the long-term prescription transporting utilization process, just becoming this area and needing badly and solve the technical problem that place.

Summary of the invention

Above deficiency or Improvement requirement for prior art, the invention provides the bamboo coiled composite tube of a kind of super large caliber and manufacture method thereof, wherein by the structure of each key component composition and set-up mode fully specific occasion in conjunction with super large caliber are paid attention to and redesigned, especially some are directly influenced this super large caliber composite pipe some important feature parameters in processing and manufacturing and dependability etc. be adjusted and improve, concrete test shows, it can not only effectively overcome along with caliber enlarges markedly the various adverse effects caused, but also can ensure that the bamboo coiled composite tube material of this super large caliber keeps the unstressed defect distribution characteristic of self steadily in the long term, it is therefore particularly suitable for such as agricultural irrigation, sea water is carried, electric power plant circulating water, oil-gas transportation, mixed mortar, the application scenarios such as municipal drainage blowdown.

For achieving the above object, according to one aspect of the present invention, provide the bamboo coiled composite tube of a kind of super large caliber, it is characterized in that, the diameter of bore of this bamboo coiled composite tube is 1800mm～4000mm, more preferably 2200mm～3600mm, and include inner liner, composite strengthening layer and external protection coating from inside to outside successively；Wherein:

Described inner liner is solidified prepared by the fiber felt or non-woven fabrics being soaked with adhesive, and forms antiseepage and smooth inwall；Described composite strengthening layer is solidified outside described inner liner by the thin bamboo strips used for weaving curtain multi-lay winding being stained with resin and forms, this thin bamboo strips used for weaving curtain is the curtain shape structure connected to form by litzendraht wire by multiple thin bamboo strips used for weaving sheets, the hoop mode that all thin bamboo strips used for weaving curtains all adopt winding angle to be 85 °～90 ° relative to described inner liner is wound, and is wound around total number of plies and is set to more than 14 layers；In addition, described composite strengthening layer includes the first enhancement layer and the second enhancement layer from inside to outside, wherein the thin bamboo strips used for weaving curtain of this first enhancement layer adopts the thin bamboo strips used for weaving curtain length direction that the length direction of hoop thin bamboo strips used for weaving curtain namely all thin bamboo strips used for weaving sheets forms with it all to keep consistent, the thin bamboo strips used for weaving curtain of this second enhancement layer then adopts the thin bamboo strips used for weaving curtain width that the length direction of axial thin bamboo strips used for weaving curtain namely all thin bamboo strips used for weaving sheets all forms with it to keep consistent, and the thickness of this first enhancement layer at least accounts for more than the 70% of described enhancement layer gross thickness；Described external protection coating is directly coated with the outer surface being solidificated in described second enhancement layer, and plays the effect of water-tight corrosion-proof and radioprotective.

For the technical scheme that the above-mentioned design of the present invention is formed, on the one hand when manufacturing the bamboo coiled composite tube of this super large caliber, by adopting multilamellar thin bamboo strips used for weaving curtain rather than independent thin bamboo strips used for weaving sheet or bar and mixed with resin to be wound by making composite strengthening layer, so not only facilitate resin and in the radial direction the spacing of adjacent thin bamboo strips used for weaving curtain and their internal gaps are all obtained abundant and uniform filling at pipeline, the more important thing is that thin bamboo strips used for weaving curtain can be made to obtain when hoop is wound around to be fully extended, its axial tensile strength is made to play to maximizing, can effectively overcome the phenomenon of the thin bamboo strips used for weaving easy warpage of curtain tail end simultaneously；On the other hand, by composite strengthening layer being divided into multiple structure and each adopting the thin bamboo strips used for weaving curtain of different form of presentation successively to process, particularly their different-thickness accounting is made and adjusting targetedly, thin bamboo strips used for weaving curtain two kinds different can be made accordingly to play good complementary action, even and if cause the composite strengthening layer being finally wound still be able to when caliber is significantly expanded well keep the unstressed distribution defect of pipeline overall structure feature, improve bamboo coiled composite tube road performance in crushing resistance, ring stiffness and life-time service quality stability etc. simultaneously.

An improvement project as the present invention, above-mentioned composite strengthening layer preferably also includes the 3rd enhancement layer, the thin bamboo strips used for weaving curtain of the 3rd enhancement layer adopts the thin bamboo strips used for weaving curtain length direction that the length direction of hoop thin bamboo strips used for weaving curtain namely all thin bamboo strips used for weaving sheets forms with it all to keep consistent equally, and the hoop mode being then 85 °～90 ° with winding angle continues to be wrapped in the outside of described second enhancement layer.Additionally, the thickness sum of above-mentioned first enhancement layer and the 3rd enhancement layer is set to account for the 85%～90% of described composite strengthening layer gross thickness further, the thickness of this second enhancement layer is set to account for the 10%～15% of described composite strengthening layer gross thickness.More sample quality test shows, the numerical range of above-mentioned thickness accounting makes the final composite strengthening layer prepared and composite pipe obtain better balance between required winding thickness and overall construction intensity, it not only facilitates the compressive property optimization of composite strengthening layer, and without increasing the excessive number of plies and causing waste of raw materials for the actual course of processing, for improving productivity and quality, controllability aspect plays a significant role.

Another improvement project as the present invention, for forming each thin bamboo strips used for weaving sheet in described hoop thin bamboo strips used for weaving curtain, its specifications parameter preferably sets as follows: long for 1500mm～2500mm, wide be 0.5mm～1.5mm for 4mm～10mm, thickness, and the length of overlap joint formation piecewise is more than the hoop thin bamboo strips used for weaving curtain that 100m, width are 20mm～50mm.In addition, for each thin bamboo strips used for weaving sheet forming described axial thin bamboo strips used for weaving curtain, its specifications parameter preferably sets as follows: long for 20mm～50mm, wide be 0.5mm～1.5mm for 4mm～10mm, thickness, and the length of overlap joint formation piecewise is more than the hoop thin bamboo strips used for weaving curtain that 100m, width are 20mm～50mm.Why the concrete specifications parameter of above thin bamboo strips used for weaving sheet and two class thin bamboo strips used for weaving curtains is made design above, mainly consider that they are as one of basic ingredient in composite strengthening layer, bamboo fibre size and permutation and combination method thereof that it possesses all can directly influence each thin bamboo strips used for weaving sheet and the intensity particularly axially hot strength of thin bamboo strips used for weaving volume, therefore in this patent it has been carried out equally research targetedly and test, and has set above design parameter specification to conform better to manufacture and the instructions for use of super large caliber bamboo wrapped tube.

As another improvement project of the present invention, the shape of cross section of above-mentioned thin bamboo strips used for weaving sheet is preferably processed into rectangle, and water content is 10%～20%, and the interval area between adjacent thin bamboo strips used for weaving sheet is 0.09cm²～0.25cm².Pass through design above, the thin bamboo strips used for weaving sheet of rectangle not only facilitates and overlaps at end face, simultaneously within it lateral surface also can obtain to press close to each other greatly, make all can fully obtain the high axial tensile strength characteristic of bamboo fibre accordingly in all directions of composite strengthening layer；In addition, the filling process of resin Composition also can be played large effect by thin bamboo strips used for weaving sheet and water content and interval area, above-mentioned specific standard enables to resin and is easier to penetrate in thin bamboo strips used for weaving curtain and is fully combined with it, and then the performance such as structural strength and bending resistance impact resistance of being favorably improved all kinds of enhancement layer.

As another improvement project of the present invention, the gross thickness of above-mentioned composite strengthening layer is set to account for more than the 90% of overall tube wall thickness, more preferably accounts for the 92%～96% of overall tube wall thickness.In this manner it is possible to give full play to composite strengthening layer to whole super large caliber bamboo winding pipe the played central role of pressure-bearing aspect, and it is easy to the processing quality control between each composition layer is played directive function.

Another improvement project as the present invention, in above-mentioned composite strengthening layer except thin bamboo strips used for weaving curtain and resin, may further be enriched with bio-based filler and firming agent, mass fraction between wherein said resin, bio-based filler and this three of firming agent is set to 100:15～25:2～5, and together sprinkling adheres on described thin bamboo strips used for weaving curtain after mixing.Additionally, described resin is selected from the one in polyurethane resin, phenolic resin, Lauxite or epoxy resin；Described bio-based filler is selected from bamboo and wood, fiber crops, straw, plant shell or other rigid bio materials, and its average order number is set as 20～100.Pass through design above, comprise bio-based filler, the resin compound of firming agent can promote the filling between thin bamboo strips used for weaving curtain and bamboo fibre and combination, and possess good affinity between bio-based filler and the bamboo fibre of above-mentioned particular type and granularity, and then the structural strength of composite strengthening layer can be improved further.

Another improvement project as the present invention, for above-mentioned inner liner, its thickness is at least 2mm, and preferably from interior the first inner liner and the second inner liner of including to outward, wherein the thickness of this first inner liner is less than this second inner liner, and the resin adhesive capacity of this first inner liner is set to be greater than this second inner liner.Additionally, in above-mentioned inner liner fiber felt or non-woven fabrics be preferably bamboo fiber felt or bamboo fibre non-woven fabrics, and the diameter of this bamboo fibre is 0.8mm～1.2mm；Described first inner liner preferably employs 35g/m²～50g/m²Fiber felt or non-woven fabrics, described second inner liner preferably employs 150g/m²～300g/m²Fiber felt or non-woven fabrics.By above is referred to the targeted design of inner liner composition structure and important parameter, even if enabling to the anti-intrinsic pressure and barrier properties that this inner liner also is able to keep good when caliber enlarges markedly, additionally aid the abundant combination between composite strengthening layer simultaneously, and reduce the energy consumption of fluid conveying.

It is another aspect of this invention to provide that the method further correspondingly providing bamboo coiled composite tube for manufacturing super large caliber, it is characterised in that the method comprises the following steps:

The cutting processing of (a) thin bamboo strips used for weaving sheet: bamboo wood is processed into multiple thin bamboo strips used for weaving sheet according to following two main specifications size cutting: the length of the first thin bamboo strips used for weaving sheet be 1500mm～2500mm, wide be 0.5mm～1.5mm for 4mm～10mm, thickness, the length of the second thin bamboo strips used for weaving sheet be 20mm～50mm, wide be 0.5mm～1.5mm for 4mm～10mm, thickness；Then through defat, cleaning and processed；

The preparation of (b) thin bamboo strips used for weaving curtain: by the first thin bamboo strips used for weaving sheet described overlap joint, simultaneously arranged in parallel along its width piecewise along its length, finally it is knitted to form total length more than the hoop thin bamboo strips used for weaving curtain that 100m, width are 20mm～50mm, and the entire length direction of this hoop thin bamboo strips used for weaving curtain all keeps consistent with the length direction of all thin bamboo strips used for weaving sheets；Additionally, overlapped piecewise along its width by described the second thin bamboo strips used for weaving sheet, finally it is knitted to form the total length axial thin bamboo strips used for weaving curtain more than 100m, 20mm～50mm, and the overall width direction of this axial thin bamboo strips used for weaving curtain all keeps consistent with the length direction of all thin bamboo strips used for weaving sheets；

The preparation of (c) inner liner: make thickness with the fiber felt or non-woven fabrics that are stained with anti-corrosion resin on straight tube mould and be at least the inner liner of 2mm, and form antiseepage and smooth inwall；

The preparation of (d) composite strengthening layer: first described hoop thin bamboo strips used for weaving curtain becomes to be wrapped on wrapping machine debatching, then the hoop mode adopting winding angle to be 85 °～90 ° relative to described inner liner is successively wrapped on the inner liner of straight tube mould, winding limit, limit is to thin bamboo strips used for weaving curtain sprinkling resin, until completing the first enhancement layer of desired thickness；Then, the outside adopting above-mentioned hoop mode to be wrapped in this first enhancement layer equally on described axial thin bamboo strips used for weaving curtain, until completing the second enhancement layer of desired thickness；Then described hoop thin bamboo strips used for weaving curtain is continued the outside adopting above-mentioned hoop mode to be wrapped in this second enhancement layer, until completing the 3rd enhancement layer of desired thickness；Wherein, the thickness sum of described first enhancement layer and the 3rd enhancement layer at least accounts for more than the 80% of described enhancement layer gross thickness, and the total number of plies of winding of both the above thin bamboo strips used for weaving curtain is more than 14 layers；

The preparation of (e) external protection coating: at outer surface direct spraying anticorrosion waterproof and the radiation proof material of described composite strengthening layer, ultimately form the bamboo coiled composite tube product of required super large caliber specification.

In general, by the contemplated above technical scheme of the present invention compared with prior art, mainly possess following technological merit:

1, first composite strengthening layer as tubing primary clustering is all studied in many aspects such as its concrete structure composition and key parameter combinations and improves by the present invention, especially by being in inside enhancement layer and the thin bamboo strips used for weaving curtain of opposite exterior lateral sides is respectively at winding process, the key parameters such as thickness accounting make different designs targetedly, the advantages such as the axial strength of bamboo fibre itself is high and toughness is strong can be given full play to so on the one hand, guarantee the anti-intrinsic pressure and pipe stiffness of tube wall, the function that stress supplements mutually can also be played on the other hand in the multiple directions of heavy caliber tube wall, and significantly improve the bending resistance impact resistance of tube wall and avoid the performances such as outside cracking, corresponding overcoming preferably on the whole may in the adverse effect of the link generations such as manufacture and use owing to caliber increases；

2, also to the thin bamboo strips used for weaving sheet constituting the first to the 3rd basic component units of enhancement layer in the present invention, thin bamboo strips used for weaving curtain and the resin matched with this and filler etc. are respectively in its concrete dimensions, cross sectional shape, the parameters such as specific selection and powder order number have not made targeted design, owing to the manufacture of the bamboo coiled composite tube of super large caliber and use link can be played large effect by these parameters equally, more test shows, above-mentioned parameter designed by the present invention can not only high efficiency, produce the bamboo coiled composite tube of required bore quality controllablely, and under using environment over a long time, can also ensure that quality and stability；

3, inner liner is designed as multiple structure by the present invention, the aspects such as the specification of each layer, component material have been made targeted design respectively simultaneously, in this way, can in the good balance of many-sided acquirement such as the smoothness of inner liner, corrosion resistance and resistance to stress intensity, so namely, when the bamboo wrapped tube of this super large caliber of box lunch is for carrying big flow Korrosionsmedium, it is not easy to cause fluid transportation energy consumption excessive or the phenomenon of breakage inside lining layer, and contributes to the intensity that be combined with each other between enhancement layer；

4, super large caliber its processing technique of bamboo coiled composite tube of the present invention substantially all carries out at normal temperatures and pressures, it is easy to quality control and production process three-waste free discharge, possesses the characteristic such as low-carbon environment-friendly, energy-saving and emission-reduction, obtained bamboo coiled composite tube still is able to keep steadily in the long term the unstressed defect distribution characteristic of self under diameter of bore specification even bigger for 1800mm～4000mm, thus alternative all kinds of conventional tubing be particularly suited for the application scenarios such as agricultural irrigation, sea water conveying, electric power plant circulating water, oil-gas transportation, municipal drainage blowdown.

Accompanying drawing explanation

Fig. 1 is the basic structure sectional view of the bamboo coiled composite tube possessing super large caliber designed by the preferred embodiment for the present invention；

Fig. 2 a is the structural representation of the hoop thin bamboo strips used for weaving curtain being knitted to form according to the present invention；

Fig. 2 b is the structural representation of the axial thin bamboo strips used for weaving curtain being knitted to form according to the present invention；

Fig. 3 is for preparing the process method flow chart of the bamboo coiled composite tube of super large caliber according to the present invention；

In all of the figs, identical accompanying drawing labelling is used for representing identical element or structure, wherein:

The thin bamboo strips used for weaving sheet of thin bamboo strips used for weaving sheet 2201-the second specification of 1-inner liner 2-composite strengthening layer 3-external protection coating 21 first enhancement layer 22-the second enhancement layer 210-hoop thin bamboo strips used for weaving curtain 220-axial thin bamboo strips used for weaving curtain the first specification of 2101-

Detailed description of the invention

In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.As long as just can be mutually combined additionally, technical characteristic involved in each embodiment of invention described below does not constitute conflict each other.

Fig. 1 is the basic structure sectional view of the bamboo coiled composite tube of the super large caliber designed by the preferred embodiment for the present invention.As shown in fig. 1, the diameter of bore of this bamboo coiled composite tube is 1800mm～4000mm, more preferably 2200mm～3600mm, and mainly include the assemblies such as inner liner 1, composite strengthening layer 2 and external protection coating 3 from inside to outside, separately below it is illustrated one by one.

Inner liner 1 is made up of the fiber felt or non-woven fabrics being stained with anti-corrosion resin, and form antiseepage and smooth inwall, its major function is to contact with all kinds of media to be conveyed, and under the premise do not corroded by medium and necessary internal pressure strength is provided, it is ensured that this layer can carry out conveying medium in low-frictional force and low fluid transportation energy consumption ground as far as possible.

In the present invention, in view of the bore of whole tubing is well beyond the specification of common tubing, therefore can preferably inner liner be designed as 2 layers or more multi-layered structure, specifically, this inner liner includes the first inner liner and the second inner liner from inside to outside, and the thickness of the first inner liner is designed as the thickness less than the second inner liner, the resin adhesive capacity of the first inner liner is designed as the resin adhesive capacity more than the second inner liner simultaneously.In this way, the first inner liner being in inside can be processed to form more smooth inner surface, reduce pumped (conveying) medium time frictional force and energy consumption, be in the second inner liner of opposite exterior lateral sides then to the resistance to stress intensity of whole inner liner and and composite strengthening layer 2 between combination play prior effect, particularly avoid carrying the medium impact failure to inner liner and whole tubing under occasion at the big flow of heavy caliber.Additionally, bamboo fibre can also be adopted in this inner liner to be processed to form fiber felt or non-woven fabrics, and through more contrast test, may be selected to be the diameter of bamboo fibre is 0.8mm～1.2mm, and the first inner liner adopts 35g/m²～50g/m²Fiber felt or non-woven fabrics, described second inner liner adopt 150g/m²～300g/m²Fiber felt or non-woven fabrics.For the thickness of whole inner liner, it preferably accounts for about the 5%～8% of overall tube wall thickness.

As another key component of the present invention, pipe stiffness and the anti-intrinsic pressure performance of the bamboo coiled composite tube material of whole super large caliber are played core impact by composite strengthening layer 2.Correspondingly, at the bore of whole tubing well beyond under the Developed Background of common tubing specification, it is necessary to composite strengthening layer 2 emphasis in its concrete structure composition and key parameter combination etc. is studied and improved.

Specifically, in the present invention, this composite strengthening layer is formed by resin-bonded solidification outside described inner liner 1 by thin bamboo strips used for weaving curtain multi-lay winding simultaneously, it can be greatly classified into 2 or more different composition and functional area from inside to outside, shown in as exemplary in Fig. 1, namely relatively press close to the first enhancement layer 21 of inner liner 1 and be relatively distant from the second enhancement layer 22 of inner liner 1, wherein the first enhancement layer 21 is preferably by pressing close to the hoop thin bamboo strips used for weaving curtain of more than the Floor 12 of inner liner 1 and resin the most or resin compound collectively forms, its hoop canoe adopting winding angle to be 85 °～90 ° relative to inner liner is successively processed on inner liner, second enhancement layer 22 then continues to be wrapped in the whole outside of the first enhancement layer 21, it is preferably collectively formed by the thin bamboo strips used for weaving curtain of more than two layers and resin or resin compound, and the hoop canoe that angle is 85 °～90 ° that is wound around of they same employings in the present invention is successively processed.In addition, on the basis of above-mentioned structure, can also continue to adopt hoop thin bamboo strips used for weaving curtain equally with the hoop canoe arranged outside the 3rd enhancement layer (being not specifically illustrated in figure) at the second enhancement layer 22, thus constitute the three-layer composite structure of hoop thin bamboo strips used for weaving curtain-axial thin bamboo strips used for weaving curtain-hoop thin bamboo strips used for weaving curtain further, wherein, the thickness of this first enhancement layer and the 3rd enhancement layer is set at least account for more than the 80% of this composite strengthening layer gross thickness, and more preferably 85%～90%；The thickness accounting of this second enhancement layer corresponds to and accounts for the 10%～15% of described composite strengthening layer gross thickness.

With reference to Fig. 2 a and 2b, specifically show the described hoop thin bamboo strips used for weaving curtain overlap joint different with axial thin bamboo strips used for weaving curtain and weaving manner.In Fig. 2 a exemplary shown in, this hoop thin bamboo strips used for weaving curtain 210 be by the thin bamboo strips used for weaving sheet 2101 of the first specifications all along its length piecewise overlap joint, simultaneously by arranged in parallel along its width for the thin bamboo strips used for weaving sheet of this first specification a small amount of, finally it is knitted to form total length more than the hoop thin bamboo strips used for weaving curtain that 100m, width are 20mm～50mm, and namely this most important feature of hoop thin bamboo strips used for weaving curtain 210 is in that, its entire length direction with based on the length direction of all thin bamboo strips used for weaving sheets of component units all keep consistent.Equally, in Fig. 2 b exemplary shown in, this axial thin bamboo strips used for weaving curtain 220 is to be overlapped piecewise along its width by the thin bamboo strips used for weaving sheet 2201 of all the second specifications, finally it is knitted to form total length more than the axial thin bamboo strips used for weaving curtain that 100m, width are 20mm～50mm, this axial thin bamboo strips used for weaving curtain 220 can be made up of single thin bamboo strips used for weaving sheet on overall width direction, or shorter thin bamboo strips used for weaving oblique cut grafting composition on a small quantity, but namely its most important feature is in that, the overall width direction of this axial thin bamboo strips used for weaving curtain with based on the length direction of all thin bamboo strips used for weaving sheets of component units all keep consistent.

In this way, by adopting multilamellar thin bamboo strips used for weaving curtain rather than independent thin bamboo strips used for weaving sheet or bar and mixed with resin to be wound, so not only facilitate resin and in the radial direction the spacing of adjacent thin bamboo strips used for weaving curtain and their internal gaps are all obtained abundant and uniform filling at pipeline, the more important thing is that thin bamboo strips used for weaving curtain can be made to obtain when hoop is wound around to be fully extended, make its axial tensile strength play to maximizing, can effectively overcome the phenomenon of the thin bamboo strips used for weaving easy warpage of curtain tail end simultaneously；On the other hand, by composite strengthening layer being divided into multiple structure and each adopting different form of presentation, first enhancement layer 21 (or the first enhancement layer is plus the 3rd enhancement layer) of the above-mentioned number of plies and thickness accounting can give full play to the advantages such as the axial strength of bamboo fibre self is high and toughness is strong better in inner side, and guarantees the tube wall anti-intrinsic pressure and pipe stiffness characteristic when the conveying of big flow medium；With this cooperatively, the second enhancement layer 22 of above-mentioned level and thickness accounting can make stress distribution disperse with being more uniformly distributed along the multiple directions of tube wall, and significantly improve the bending resistance impact resistance of tube wall and avoid the phenomenons such as outside cracking.Corresponding to integrated testability, even if above-mentioned bamboo coiled composite tube still is able to keep well the feature of the unstressed distribution defect of pipeline overall structure when caliber is significantly expanded, improve bamboo coiled composite tube road in the performance such as crushing resistance, ring stiffness simultaneously, especially can ensure the reliability of performance steadily in the long term.

Consider that thin bamboo strips used for weaving sheet is as one of ingredient the most basic in composite strengthening layer, bamboo fibre size and permutation and combination method thereof that they possess all can directly influence the intensity particularly axially hot strength that each thin bamboo strips used for weaving is rolled up, and therefore it carried out research targetedly and design in this patent equally.Another preferred embodiment according to the present invention, for forming each thin bamboo strips used for weaving sheet in described hoop thin bamboo strips used for weaving curtain, its specifications parameter preferably sets as follows: long for 1500mm～2500mm, wide be 0.5mm～1.5mm for 4mm～10mm, thickness, and the length of overlap joint formation piecewise is more than the hoop thin bamboo strips used for weaving curtain that 100m, width are 20mm～50mm.In addition, for each thin bamboo strips used for weaving sheet forming described axial thin bamboo strips used for weaving curtain, its specifications parameter preferably sets as follows: long for 20mm～50mm, wide be 0.5mm～1.5mm for 4mm～10mm, thickness, and the length of overlap joint formation piecewise is more than the hoop thin bamboo strips used for weaving curtain that 100m, width are 20mm～50mm.More sample test shows, above-mentioned design parameter specification can play hoop thin bamboo strips used for weaving curtain and the axial respective performance advantage of thin bamboo strips used for weaving curtain better, and then makes the combination between the first composite bed and the second composite bed can meet the specific occasion such as manufacture and use of super large caliber bamboo wrapped tube satisfactorily.Additionally, as optimization design more deep on above-mentioned basis, the shape of cross section of above-mentioned thin bamboo strips used for weaving sheet is preferably processed into rectangle, and water content is 10%～20%, and the interval area between adjacent thin bamboo strips used for weaving sheet is 0.09cm²～0.25cm²。

According to another preferred embodiment of the present invention, the gross thickness of above-mentioned composite strengthening layer is set to account for more than the 90% of overall tube wall thickness, more preferably accounts for the 92%～96% of overall tube wall thickness.In view of this composite strengthening layer occupies the status of main body in whole tube wall, in order to its structural strength suitably being optimized from other important performances, in above-mentioned composite strengthening layer except resin and these solvents of thin bamboo strips used for weaving sheet, it is also preferred that bio-based filler and firming agent can be added with, wherein through reality test, mass fraction between described resin, bio-based filler and this three of firming agent is set to 100:15～25:2～5, and together sprinkling adheres on described thin bamboo strips used for weaving curtain after mixing.Additionally, described resin is selected from the one in polyurethane resin, phenolic resin, Lauxite or epoxy resin；Described bio-based filler is selected from bamboo and wood, fiber crops, straw, plant shell or other rigid bio materials, and its average order number is set as 20～100.Pass through design above, comprise bio-based filler, the resin compound of firming agent can promote the filling between thin bamboo strips used for weaving curtain and bamboo fibre and combination, and possess good affinity between bio-based filler and the bamboo fibre of above-mentioned particular type and granularity, and then the overall construction intensity of composite strengthening layer and anti-intrinsic pressure performance can be improved further, and help speed up the shaping efficiency in composite strengthening layer winding process operation process and quality controllability.

Finally, external protection coating 3 can directly be coated with the outer surface being solidificated in described composite strengthening layer 2, and primarily serves the effect such as water-tight corrosion-proof and radioprotective.Specifically, it is 2 layers or more than 2 layers that this external protection coating can also spray, such as the materials such as epoxy resin, unsaturated polyester resin or Colophonium can be adopted, and add radioprotective filler, its thickness is more preferably at least 3mm, in order to better under all kinds of severe use environment, the tubing of super large caliber is played protective action.

The bamboo coiled composite tube manufacturing process according to the present invention and key process parameter design thereof is more clearly illustrated below in conjunction with some specific embodiments.

Embodiment 1

Bamboo processing is processed into multiple thin bamboo strips used for weaving sheet according to following two specification cutting, wherein the specification of the first thin bamboo strips used for weaving sheet is set to long 1500m, wide 8mm, thickness 0.5mm, moisture content may be selected to be 10%, the specification of the second thin bamboo strips used for weaving sheet is set to long 20mm, wide 6mm, thickness 1mm, moisture content may be selected to be 10%, then standby through defat, cleaning and processed.

Then, by the first thin bamboo strips used for weaving sheet above-mentioned along its length piecewise overlap joint, simultaneously arrange (such as 6 thin bamboo strips used for weaving sheets) along its width parallel, ultimately forming total length be 150m, width is about 48mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is 0.09cm²Hoop thin bamboo strips used for weaving curtain；Additionally, overlapped piecewise along its width by above-mentioned the second thin bamboo strips used for weaving sheet, being finally knitted to form total length be 150m, width is 20mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is similarly 0.09cm²Axial thin bamboo strips used for weaving curtain.

Then, being one layer of mould release film of parcel on the polished glass fiber reinforced plastic straight pipe mould of 1800mm at external diameter, then with being stained with the bamboo fibre non-woven fabrics of anti-corrosion resin, making thickness on pipe mold successively be 2mm, density is 35g/m²The first inner liner and thickness be 3mm, density be 200g/m²The second inner liner, the wherein optional epoxy resin of resin, the diameter of the bamboo fibre in non-woven fabrics is about 1mm, is consequently formed antiseepage and smooth inwall.

Then, after inner liner solidifies, above two thin bamboo strips used for weaving curtain becomes to be wrapped on wrapping machine debatching respectively, these thin bamboo strips used for weaving curtains can pass through the resin storage tank equipped with Lauxite and apply the resin of upper pulpous state, then successively it is wrapped on the inner liner of straight tube mould, in whole winding process, the mode being wound around initially with hoop processes initial 12 layer hoop thin bamboo strips used for weaving curtain, winding limit, limit is to thin bamboo strips used for weaving curtain sprinkling resin, and the thickness controlling corresponding the first formed enhancement layer accounts for the 70% of composite strengthening layer gross thickness, then proceed to adopt the mode that hoop is wound around to continue to be wound around 5 layers of axial thin bamboo strips used for weaving curtain, it is winding limit, limit equally to thin bamboo strips used for weaving curtain sprinkling resin, and the thickness controlling corresponding the second formed enhancement layer accounts for the 30% of composite strengthening layer gross thickness.The resin jointly adhered in winding process may be selected to be Lauxite, and final acquisition thickness accounting accounts for the composite strengthening layer of the 90% of overall tube wall thickness.

After all winding operations, composite strengthening layer is solidify to form into pipe, then demoulding process acquisition bamboo coiled composite tube.Finally, at the unsaturated polyester resin of one layer of water-tight corrosion-proof function of tubing external spray, thickness is 3mm about, and final processing prepares the bamboo coiled composite tube product that bore is 1800mm.

Embodiment 2

Bamboo processing is processed into multiple thin bamboo strips used for weaving sheet according to following two specification cutting, wherein the specification of the first thin bamboo strips used for weaving sheet is set to long 2000m, wide 8mm, thickness 0.5mm, moisture content may be selected to be 15%, the specification of the second thin bamboo strips used for weaving sheet is set to long 20mm, wide 10mm, thickness 0.5mm, moisture content may be selected to be 15%, then standby through defat, cleaning and processed.

Then, by the first thin bamboo strips used for weaving sheet above-mentioned along its length piecewise overlap joint, simultaneously arrange (such as 6 thin bamboo strips used for weaving sheets) along its width parallel, ultimately forming total length be 150m, width is about 48mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is 0.12cm²Hoop thin bamboo strips used for weaving curtain；Additionally, overlapped piecewise along its width by above-mentioned the second thin bamboo strips used for weaving sheet, being finally knitted to form total length be 150m, width is 20mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is similarly 0.12cm²Axial thin bamboo strips used for weaving curtain.

Then, being one layer of mould release film of parcel on the polished glass fiber reinforced plastic straight pipe mould of 2200mm at external diameter, then with being stained with the bamboo fibre non-woven fabrics of anti-corrosion resin, making thickness on pipe mold successively be 2mm, density is 50g/m²The first inner liner and thickness be 3mm, density be 300g/m²The second inner liner, the wherein optional epoxy resin of resin, the diameter of the bamboo fibre in non-woven fabrics is about 1mm, is consequently formed antiseepage and smooth inwall；

Then, after inner liner solidifies, thin bamboo strips used for weaving curtain becoming to be wrapped on wrapping machine debatching, these thin bamboo strips used for weaving curtains can pass through the resin storage tank equipped with Lauxite and apply the resin of upper pulpous state, are then successively wrapped on the inner liner of straight tube mould.In whole winding process, the mode being wound around initially with hoop processes initial 16 layer hoop thin bamboo strips used for weaving curtain, winding limit, limit is to thin bamboo strips used for weaving curtain sprinkling resin, and the thickness controlling corresponding the first formed enhancement layer accounts for the 80% of composite strengthening layer gross thickness, then proceed to adopt the mode that hoop is wound around to continue to be wound around 4 layers of axial thin bamboo strips used for weaving curtain, be equally winding limit, limit to thin bamboo strips used for weaving curtain sprinkling resin, and the thickness controlling corresponding the second formed enhancement layer accounts for the 20% of composite strengthening layer gross thickness.The resin jointly adhered in winding process may be selected to be Lauxite and is added with the stalk powder and a small amount of firming agent that average order number is 20, wherein the parts by weight between resin, stalk powder and firming agent three are 100:15:5, and final acquisition thickness accounting accounts for the enhancement layer of the 92% of overall tube wall thickness.

After all winding operations, enhancement layer is solidify to form into pipe, then demoulding process acquisition bamboo coiled composite tube.Finally, at the unsaturated polyester resin of one layer of water-tight corrosion-proof function of tubing external spray, thickness is 3mm about, and final acquisition bore is the bamboo coiled composite tube of 2200mm.

Embodiment 3

Bamboo processing is processed into multiple thin bamboo strips used for weaving sheet according to following two specification cutting, wherein the specification of the first thin bamboo strips used for weaving sheet is set to long 2500m, wide 4mm, thickness 1mm, moisture content may be selected to be 15%, the specification of the second thin bamboo strips used for weaving sheet is set to long 40mm, wide 4mm, thickness 1mm, moisture content may be selected to be 15%, then standby through defat, cleaning and processed.

Then, by the first thin bamboo strips used for weaving sheet above-mentioned along its length piecewise overlap joint, simultaneously arrange (such as 10 thin bamboo strips used for weaving sheets) along its width parallel, ultimately forming total length be 150m, width is about 40mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is 0.25cm²Hoop thin bamboo strips used for weaving curtain；Additionally, overlapped piecewise along its width by above-mentioned the second thin bamboo strips used for weaving sheet, being finally knitted to form total length be 150m, width is 40mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is similarly 0.25cm²Axial thin bamboo strips used for weaving curtain.

Then, being one layer of mould release film of parcel on the polished glass fiber reinforced plastic straight pipe mould of 2600mm at external diameter, then with being stained with the bamboo fibre non-woven fabrics of anti-corrosion resin, making thickness on pipe mold successively be 3mm, density is 50g/m²The first inner liner and thickness be 5mm, density be 300g/m²The second inner liner, the wherein optional epoxy resin of resin, the diameter of the bamboo fibre in non-woven fabrics is about 1.2mm, is consequently formed antiseepage and smooth inwall；

Then, after inner liner solidifies, thin bamboo strips used for weaving curtain becoming to be wrapped on wrapping machine debatching, these thin bamboo strips used for weaving curtains can pass through the resin storage tank equipped with phenolic resin and apply the resin of upper pulpous state, are then successively wrapped on the inner liner of straight tube mould.In whole winding process, the mode being wound around initially with hoop processes initial 24 layer hoop thin bamboo strips used for weaving curtain, winding limit, limit is to thin bamboo strips used for weaving curtain sprinkling resin, and the thickness controlling corresponding the first formed enhancement layer reaches desirable degree, then proceed to adopt the mode that hoop is wound around to continue to be wound around 4 layers of axial thin bamboo strips used for weaving curtain, be equally winding limit, limit to thin bamboo strips used for weaving curtain sprinkling resin, and the thickness controlling corresponding the second formed enhancement layer accounts for the 13.3% of composite strengthening layer gross thickness；Then, continue to adopt hoop mode to be wound around 2 layers of hoop thin bamboo strips used for weaving curtain, and the thickness sum controlling its 3rd enhancement layer formed and above established first enhancement layer accounts for the 86.7% of composite strengthening layer gross thickness altogether.

The resin jointly adhered in winding process may be selected to be phenolic resin and is added with the bamboo powder and a small amount of firming agent that average order number is 50, wherein the parts by weight between resin, bamboo powder and firming agent three are 100:25:5, and final acquisition thickness accounting accounts for the enhancement layer of the 95% of overall tube wall thickness.

After all winding operations, enhancement layer is solidify to form into pipe, then demoulding process acquisition bamboo coiled composite tube.Finally, at the Colophonium of one layer of water-tight corrosion-proof function of tubing external spray, simultaneously added with antiradiation agent, thickness is 5mm about, and final prepared bore is the bamboo coiled composite tube product of 2600mm.

Embodiment 4

Bamboo processing is processed into multiple thin bamboo strips used for weaving sheet according to following two specification cutting, wherein the specification of the first thin bamboo strips used for weaving sheet is set to long 2500m, wide 10mm, thickness 1.5mm, moisture content may be selected to be 10%, the specification of the second thin bamboo strips used for weaving sheet is set to long 50mm, wide 8mm, thickness 1.5mm, moisture content may be selected to be 10%, then standby through defat, cleaning and processed.

Then, by the first thin bamboo strips used for weaving sheet above-mentioned along its length piecewise overlap joint, simultaneously arrange (such as 5 thin bamboo strips used for weaving sheets) along its width parallel, ultimately forming total length be 200m, width is about 50mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is 0.22cm²Hoop thin bamboo strips used for weaving curtain；Additionally, overlapped piecewise along its width by above-mentioned the second thin bamboo strips used for weaving sheet, being finally knitted to form total length be 200m, width is 50mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is similarly 0.22cm²Axial thin bamboo strips used for weaving curtain.

Being one layer of mould release film of parcel on the polished glass fiber reinforced plastic straight pipe mould of 3600mm at external diameter, then with being stained with the bamboo fibre non-woven fabrics of anti-corrosion resin, making thickness on pipe mold successively be 3mm, density is 50g/m²The first inner liner and thickness be 5mm, density be 250g/m²The second inner liner, the wherein optional epoxy resin of resin, the diameter of the bamboo fibre in non-woven fabrics is about 1.2mm, is consequently formed antiseepage and smooth inwall.

Then, after inner liner solidifies, thin bamboo strips used for weaving curtain becoming to be wrapped on wrapping machine debatching, these thin bamboo strips used for weaving curtains can pass through the resin storage tank equipped with epoxy resin and apply the resin of upper pulpous state, are then successively wrapped on the inner liner of straight tube mould.In whole winding process, the mode being wound around initially with hoop processes initial 32 layer hoop thin bamboo strips used for weaving curtain, winding limit, limit makes to form desired thickness to thin bamboo strips used for weaving curtain sprinkling resin, then proceed to adopt the mode that hoop is wound around to continue to be wound around 4 layers of axial thin bamboo strips used for weaving curtain, be equally winding limit, limit to thin bamboo strips used for weaving curtain sprinkling resin, and the thickness controlling corresponding the second formed enhancement layer accounts for the 10% of composite strengthening layer gross thickness.Then, continue to be wound around the hoop thin bamboo strips used for weaving curtain of 4 layers in hoop mode, and control its 3rd enhancement layer formed and above established first and the 3rd the thickness sum of enhancement layer account for the 90% of composite strengthening layer gross thickness altogether.

The resin jointly adhered in winding process may be selected to be epoxy resin and is added with the numb powder and a small amount of firming agent that average order number is 100, wherein resin, parts by weight between fiber crops powder and firming agent three are 100:20:3, final obtain the enhancement layer that thickness accounting accounts for the 94% of overall tube wall thickness.

After all winding operations, enhancement layer is solidify to form into pipe, then demoulding process acquisition bamboo coiled composite tube.Finally, at the epoxy resin of one layer of water-tight corrosion-proof function of tubing external spray, thickness is 5mm about, and final prepared bore is the bamboo coiled composite tube product of 3600mm.

Embodiment 5

Bamboo processing is processed into multiple thin bamboo strips used for weaving sheet according to following two specification cutting, wherein the specification of the first thin bamboo strips used for weaving sheet is set to long 1500m, wide 6mm, thickness 0.5mm, moisture content may be selected to be 20%, the specification of the second thin bamboo strips used for weaving sheet is set to long 30mm, wide 6mm, thickness 0.5mm, moisture content may be selected to be 10%, then standby through defat, cleaning and processed.

Then, by the first thin bamboo strips used for weaving sheet above-mentioned along its length piecewise overlap joint, simultaneously arrange (such as 5 thin bamboo strips used for weaving sheets) along its width parallel, ultimately forming total length be 200m, width is about 30mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is 0.09cm²Hoop thin bamboo strips used for weaving curtain；Additionally, overlapped piecewise along its width by above-mentioned the second thin bamboo strips used for weaving sheet, being finally knitted to form total length be 200m, width is 30mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is similarly 0.09cm²Axial thin bamboo strips used for weaving curtain.

Then, being one layer of mould release film of parcel on the polished glass fiber reinforced plastic straight pipe mould of 2600mm at external diameter, then with being stained with the bamboo fibre non-woven fabrics of anti-corrosion resin, making thickness on pipe mold successively be 5mm, density is 50g/m²The first inner liner and thickness be 7mm, density be 300g/m²The second inner liner, the wherein optional unsaturated polyester resin of resin, the diameter of the bamboo fibre in non-woven fabrics is about 1.2mm, is consequently formed antiseepage and smooth inwall.

Then, after inner liner solidifies, thin bamboo strips used for weaving curtain becoming to be wrapped on wrapping machine debatching, these thin bamboo strips used for weaving curtains can pass through the resin storage tank equipped with epoxy resin and apply the resin of upper pulpous state, are then successively wrapped on the inner liner of straight tube mould.In whole winding process, the mode being wound around initially with hoop processes initial 32 layer hoop thin bamboo strips used for weaving curtain, winding limit, limit is to thin bamboo strips used for weaving curtain sprinkling resin and controls to reach desired thickness, then proceed to adopt the mode that hoop is wound around to continue to be wound around 4 layers of axial thin bamboo strips used for weaving curtain, be equally winding limit, limit to thin bamboo strips used for weaving curtain sprinkling resin, and the thickness controlling corresponding the second formed enhancement layer accounts for the 10% of composite strengthening layer gross thickness；Then proceed to adopt hoop thin bamboo strips used for weaving curtain to be wound around 4 layers to prepare the 3rd enhancement layer in hoop mode in the outside of the second enhancement layer, and control the 3rd and first the thickness sum of enhancement layer account for the 90% of composite strengthening layer gross thickness.The resin jointly adhered in winding process may be selected to be epoxy resin and is added with the coconut husk powder and a small amount of firming agent that average order number is 50, wherein the parts by weight between resin, coconut husk powder and firming agent three are 100:15:2, and final acquisition thickness accounting accounts for the enhancement layer of the 90% of overall tube wall thickness.

After all winding operations, enhancement layer is solidify to form into pipe, then demoulding process acquisition bamboo coiled composite tube.Finally, at the Colophonium of one layer of water-tight corrosion-proof function of tubing external spray, and adding antiradiation agent, thickness is 5mm about, and final prepared bore is the bamboo coiled composite tube product of 2600mm.

Embodiment 6

Bamboo processing is processed into multiple thin bamboo strips used for weaving sheet according to following two specification cutting, wherein the specification of the first thin bamboo strips used for weaving sheet is set to long 2000m, wide 10mm, thickness 1.5mm, moisture content may be selected to be 10%, the specification of the second thin bamboo strips used for weaving sheet is set to long 50mm, wide 10mm, thickness 1.5mm, moisture content may be selected to be 10%, then standby through defat, cleaning and processed.

Then, by the first thin bamboo strips used for weaving sheet above-mentioned along its length piecewise overlap joint, simultaneously arrange (such as 5 thin bamboo strips used for weaving sheets) along its width parallel, ultimately forming total length be 250m, width is about 50mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is 0.25cm²Hoop thin bamboo strips used for weaving curtain；Additionally, overlapped piecewise along its width by above-mentioned the second thin bamboo strips used for weaving sheet, being finally knitted to form total length be 250m, width is 50mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is similarly 0.25cm²Axial thin bamboo strips used for weaving curtain.

Being one layer of mould release film of parcel on the polished glass fiber reinforced plastic straight pipe mould of 3600mm at external diameter, then with being stained with the bamboo fibre non-woven fabrics of anti-corrosion resin, making thickness on pipe mold successively be 3mm, density is 50g/m²The first inner liner and thickness be 5mm, density be 200g/m²The second inner liner, the wherein optional epoxy resin of resin, the diameter of the bamboo fibre in non-woven fabrics is about 0.8mm, is consequently formed antiseepage and smooth inwall；

Then, after inner liner solidifies, thin bamboo strips used for weaving curtain becoming to be wrapped on wrapping machine debatching, these thin bamboo strips used for weaving curtains can pass through the resin storage tank equipped with Lauxite and apply the resin of upper pulpous state, are then successively wrapped on the inner liner of straight tube mould.In whole winding process, the mode being wound around initially with hoop processes initial 26 layer hoop thin bamboo strips used for weaving curtain, winding limit, limit is to thin bamboo strips used for weaving curtain sprinkling resin, and the thickness controlling corresponding the first formed enhancement layer accounts for about the 87% of composite strengthening layer gross thickness, then proceed to adopt the mode that hoop is wound around to continue to be wound around 4 layers of axial thin bamboo strips used for weaving curtain, be equally winding limit, limit to thin bamboo strips used for weaving curtain sprinkling resin, and the thickness controlling corresponding the second formed enhancement layer accounts for the 13% of composite strengthening layer gross thickness.The resin jointly adhered in winding process may be selected to be Lauxite and is added with the bamboo powder and a small amount of firming agent that average order number is 20, wherein the parts by weight between resin, bamboo powder and firming agent three are 100:25:5, and final acquisition thickness accounting accounts for the enhancement layer of the 90% of overall tube wall thickness.

After all winding operations, enhancement layer is solidify to form into pipe, then demoulding process acquisition bamboo coiled composite tube.Finally, at the unsaturated polyester resin of one layer of water-tight corrosion-proof function of tubing external spray, thickness is 3mm about, and final prepared bore is the bamboo coiled composite tube product of 3600mm.

Embodiment 7

Bamboo processing is processed into multiple thin bamboo strips used for weaving sheet according to following two specification cutting, wherein the specification of the first thin bamboo strips used for weaving sheet is set to long 2000m, wide 5mm, thickness 1.5mm, moisture content may be selected to be 12%, the specification of the second thin bamboo strips used for weaving sheet is set to long 20mm, wide 6mm, thickness 1.5mm, moisture content may be selected to be 12%, then standby through defat, cleaning and processed.

Then, by the first thin bamboo strips used for weaving sheet above-mentioned along its length piecewise overlap joint, simultaneously arrange (such as 4 thin bamboo strips used for weaving sheets) along its width parallel, ultimately forming total length be 300m, width is about 20mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is 0.09cm²Hoop thin bamboo strips used for weaving curtain；Additionally, overlapped piecewise along its width by above-mentioned the second thin bamboo strips used for weaving sheet, being finally knitted to form total length be 300m, width is 20mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is similarly 0.09cm²Axial thin bamboo strips used for weaving curtain.

Being one layer of mould release film of parcel on the polished glass fiber reinforced plastic straight pipe mould of 4000mm at external diameter, then with being stained with the bamboo fibre non-woven fabrics of anti-corrosion resin, making thickness on pipe mold successively be 3mm, density is 50g/m²The first inner liner and thickness be 5mm, density be 200g/m²The second inner liner, the wherein optional epoxy resin of resin, the diameter of the bamboo fibre in non-woven fabrics is about 1mm, is consequently formed antiseepage and smooth inwall.

Then, after inner liner solidifies, thin bamboo strips used for weaving curtain becoming to be wrapped on wrapping machine debatching, these thin bamboo strips used for weaving curtains can pass through the resin storage tank equipped with Lauxite and apply the resin of upper pulpous state, are then successively wrapped on the inner liner of straight tube mould.In whole winding process, the mode being wound around initially with hoop processes initial 40 layer hoop thin bamboo strips used for weaving curtain, winding limit, limit is to thin bamboo strips used for weaving curtain sprinkling resin, and control corresponding the first formed enhancement layer and reach desired thickness, then proceed to adopt the mode that hoop is wound around to continue to be wound around 5 layers of axial thin bamboo strips used for weaving curtain, it is winding limit, limit equally to thin bamboo strips used for weaving curtain sprinkling resin, and the thickness controlling corresponding the second formed enhancement layer accounts for the 10% of composite strengthening layer gross thickness, then proceed to hoop mode adopt hoop thin bamboo strips used for weaving curtain in the outer felt of the second enhancement layer around 5 layers to form the 3rd enhancement layer, and control to make the 3rd and first the thickness sum of enhancement layer account for about the 90% of composite strengthening layer gross thickness.The resin jointly adhered in winding process may be selected to be Lauxite and is added with the stalk powder and a small amount of firming agent that average order number is 100, wherein the parts by weight between resin, stalk powder and firming agent three are 100:15:5, and final acquisition thickness accounting accounts for the enhancement layer of the 92% of overall tube wall thickness.

After all winding operations, enhancement layer is solidify to form into pipe, then demoulding process acquisition bamboo coiled composite tube.Finally, at the unsaturated polyester resin of one layer of water-tight corrosion-proof function of tubing external spray, thickness is 3mm about, and final prepared bore is the bamboo coiled composite tube product of 4000mm.

Embodiment 8

Bamboo processing is processed into multiple thin bamboo strips used for weaving sheet according to following two specification cutting, wherein the specification of the first thin bamboo strips used for weaving sheet is set to long 1500m, wide 4mm, thickness 1mm, moisture content may be selected to be 18%, the specification of the second thin bamboo strips used for weaving sheet is set to long 40mm, wide 6mm, thickness 1mm, moisture content may be selected to be 18%, then standby through defat, cleaning and processed.

Then, by the first thin bamboo strips used for weaving sheet above-mentioned along its length piecewise overlap joint, simultaneously arrange (such as 10 thin bamboo strips used for weaving sheets) along its width parallel, ultimately forming total length be 120m, width is about 40mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is 0.18cm²Hoop thin bamboo strips used for weaving curtain；Additionally, overlapped piecewise along its width by above-mentioned the second thin bamboo strips used for weaving sheet, being finally knitted to form total length be 120m, width is 40mm, and the interval area between adjacent thin bamboo strips used for weaving sheet is similarly 0.18cm²Axial thin bamboo strips used for weaving curtain.

Being one layer of mould release film of parcel on the polished glass fiber reinforced plastic straight pipe mould of 2200mm at external diameter, then with being stained with the bamboo fibre non-woven fabrics of anti-corrosion resin, making thickness on pipe mold successively be 2mm, density is 35g/m²The first inner liner and thickness be 4mm, density be 200g/m²The second inner liner, the wherein optional epoxy resin of resin, the diameter of the bamboo fibre in non-woven fabrics is about 0.8mm, is consequently formed antiseepage and smooth inwall.

Then, after inner liner solidifies, thin bamboo strips used for weaving curtain becoming to be wrapped on wrapping machine debatching, these thin bamboo strips used for weaving curtains can pass through the resin storage tank equipped with epoxy resin and apply the resin of upper pulpous state, are then successively wrapped on the inner liner of straight tube mould.In whole winding process, the mode being wound around initially with hoop processes initial 12 layer hoop thin bamboo strips used for weaving curtain, winding limit, limit is to thin bamboo strips used for weaving curtain sprinkling resin, and the thickness controlling corresponding the first formed enhancement layer reaches desirable degree, then proceed to adopt the mode that hoop is wound around to continue to be wound around 2 layers of axial thin bamboo strips used for weaving curtain, be equally winding limit, limit to thin bamboo strips used for weaving curtain sprinkling resin, and the thickness controlling corresponding the second formed enhancement layer accounts for the 12.5% of composite strengthening layer gross thickness；Then, continue to adopt hoop mode to adopt hoop thin bamboo strips used for weaving curtain to be wound around 2 layers to form the 3rd enhancement layer in the outside of the second enhancement layer, and control the 3rd and first the thickness sum of enhancement layer account for about the 87.5% of composite strengthening layer gross thickness.The resin jointly adhered in winding process may be selected to be epoxy resin and is added with the wood powder and a small amount of firming agent that average order number is 80, wherein the parts by weight between resin, wood powder and firming agent three are 100:20:5, and final acquisition thickness accounting accounts for the enhancement layer of the 96% of overall tube wall thickness.

After all winding operations, enhancement layer is solidify to form into pipe, then demoulding process acquisition bamboo coiled composite tube.Finally, at the unsaturated polyester resin of one layer of water-tight corrosion-proof function of tubing external spray, thickness is 3mm about, and final prepared bore is the bamboo coiled composite tube product of 2200mm.

Those skilled in the art will readily understand; the foregoing is only presently preferred embodiments of the present invention; not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.

Claims

1. the bamboo coiled composite tube of a super large caliber, it is characterized in that, the diameter of bore of this bamboo coiled composite tube is 1800mm～4000mm, more preferably 2200mm～3600mm, and include inner liner, composite strengthening layer and external protection coating from inside to outside successively, wherein:

Described inner liner is solidified prepared by the fiber felt or non-woven fabrics being soaked with adhesive, and forms antiseepage and smooth inwall；Described composite strengthening layer is solidified outside described inner liner by the thin bamboo strips used for weaving curtain multi-lay winding being stained with resin and forms, this thin bamboo strips used for weaving curtain is the curtain shape structure connected to form by litzendraht wire by multiple thin bamboo strips used for weaving sheets, the hoop mode that all thin bamboo strips used for weaving curtains all adopt winding angle to be 85 °～90 ° relative to described inner liner is wound, and is wound around total number of plies and is set to more than 14 layers；In addition, described composite strengthening layer includes the first enhancement layer and the second enhancement layer from inside to outside, wherein the thin bamboo strips used for weaving curtain of this first enhancement layer adopts the thin bamboo strips used for weaving curtain length direction that the length direction of hoop thin bamboo strips used for weaving curtain namely all thin bamboo strips used for weaving sheets forms with it all to keep consistent, the thin bamboo strips used for weaving curtain of this second enhancement layer then adopts the thin bamboo strips used for weaving curtain width that the length direction of axial thin bamboo strips used for weaving curtain namely all thin bamboo strips used for weaving sheets all forms with it to keep consistent, and the thickness of this first enhancement layer at least accounts for more than the 70% of described enhancement layer gross thickness；Described external protection coating is directly coated with the outer surface being solidificated in described composite strengthening layer, and plays the effect of water-tight corrosion-proof and radioprotective.

2. the bamboo coiled composite tube of super large caliber as claimed in claim 1, it is characterized in that, above-mentioned composite strengthening layer preferably also includes the 3rd enhancement layer, the thin bamboo strips used for weaving curtain of the 3rd enhancement layer adopts the thin bamboo strips used for weaving curtain length direction that the length direction of hoop thin bamboo strips used for weaving curtain namely all thin bamboo strips used for weaving sheets forms with it all to keep consistent equally, and the hoop mode being then 85 °～90 ° with winding angle continues to be wrapped in the outside of described second enhancement layer.

3. the bamboo coiled composite tube of super large caliber as claimed in claim 2, it is characterized in that, the thickness sum of this first enhancement layer and the 3rd enhancement layer is set to account for the 85%～90% of described composite strengthening layer gross thickness further, and the thickness of this second enhancement layer is set to account for the 10%～15% of described composite strengthening layer gross thickness.

4. the bamboo coiled composite tube of the super large caliber as described in claim 1-3 any one, it is characterized in that, for forming each thin bamboo strips used for weaving sheet in described hoop thin bamboo strips used for weaving curtain, its specifications parameter preferably sets as follows: long for 1500mm～2500mm, wide be 0.5mm～1.5mm for 4mm～10mm, thickness, and the length of overlap joint formation piecewise is more than the hoop thin bamboo strips used for weaving curtain that 100m, width are 20mm～50mm.

5. the bamboo coiled composite tube of super large caliber as claimed in claim 4, it is characterized in that, for each thin bamboo strips used for weaving sheet forming described axial thin bamboo strips used for weaving curtain, its specifications parameter preferably sets as follows: long for 20mm～50mm, wide be 0.5mm～1.5mm for 4mm～10mm, thickness, and the length of overlap joint formation piecewise is more than the hoop thin bamboo strips used for weaving curtain that 100m, width are 20mm～50mm.

6. the bamboo coiled composite tube of the super large caliber as described in claim 1-5 any one, it is characterised in that the shape of cross section of above-mentioned thin bamboo strips used for weaving sheet is preferably processed into rectangle, its water content is 10%～20%, and the interval area between adjacent thin bamboo strips used for weaving sheet is 0.09cm²～0.25cm²。

7. the bamboo coiled composite tube of the super large caliber as described in claim 1-6 any one, it is characterised in that the gross thickness of above-mentioned composite strengthening layer is set to account for more than the 90% of overall tube wall thickness, more preferably accounts for the 92%～96% of overall tube wall thickness.

8. right to remove the bamboo coiled composite tube of the super large caliber as described in 1-7 any one, it is characterized in that in above-mentioned composite strengthening layer except thin bamboo strips used for weaving curtain and resin, bio-based filler and firming agent are also added with it, mass fraction between wherein said resin, bio-based filler and this three of firming agent is set to 100:15～25:2～5, and together sprinkling adheres on described thin bamboo strips used for weaving curtain after mixing.

9. the bamboo coiled composite tube of the super large caliber as described in claim 1-8 any one, it is characterized in that, for above-mentioned inner liner, its thickness is at least 2mm, and preferably from interior the first inner liner and the second inner liner of including to outward, wherein the thickness of this first inner liner is less than this second inner liner, and the resin adhesive capacity of this first inner liner is set to be greater than this second inner liner；Additionally, described first inner liner preferably employs 35g/m²～50g/m²Bamboo fiber felt or bamboo fibre non-woven fabrics, described second inner liner preferably employs 150g/m²～300g/m²Bamboo fiber felt or bamboo fibre non-woven fabrics.

10. the method for manufacturing the bamboo coiled composite tube of super large caliber, the diameter of bore of this bamboo coiled composite tube is 1800mm～4000mm, it is characterised in that the method comprises the following steps: