WO2015024363A1 - 复合缠绕带热态缠绕成型的压力管及成型方法 - Google Patents

复合缠绕带热态缠绕成型的压力管及成型方法 Download PDF

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WO2015024363A1
WO2015024363A1 PCT/CN2014/070151 CN2014070151W WO2015024363A1 WO 2015024363 A1 WO2015024363 A1 WO 2015024363A1 CN 2014070151 W CN2014070151 W CN 2014070151W WO 2015024363 A1 WO2015024363 A1 WO 2015024363A1
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composite
winding
wound
tape
hot
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PCT/CN2014/070151
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English (en)
French (fr)
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吴耕田
齐军
刘志军
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Wu Gengtian
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • 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
    • F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes

Definitions

  • the invention relates to a structure of a polyethylene or polypropylene pressure pipe and a molding method thereof.
  • Polyethylene or polypropylene pressure pipes are often required for water supply and drainage and chemical piping, as well as pressure piping for special media.
  • thermoplastic materials for example, polyethylene
  • three main types of tubing and features are:
  • the polyethylene resin pressure pipe is an all-plastic pipe with uniform structure and stable chemical properties. Since the tensile strength of polyethylene material is lower than other materials, the wall thickness of the pipe is increased to increase the pressure bearing capacity of the pipe, the pipe cost is high, and the pipe diameter DN is below 1600 mm.
  • the steel skeleton (net) polyethylene resin pressure pipe is a composite pipe of steel and plastic, which has high pressure bearing capacity, anti-corrosion function and low cost.
  • the difference in heat shrinkage rate is large, the bonding strength between steel and plastic is poor, and the recycling is difficult, and the pipe diameter DN is below 1600 mm.
  • RTP tube Reinforced thermoplastic tube
  • the reinforced thermoplastic tube is the inner and outer wall polyethylene of the tube, and the intermediate interlayer is a reinforcing layer for preparing a unidirectionally arranged continuous fiber ribbon with left and right spiral layers.
  • the reinforcing material is a resin fiber fiber such as glass fiber, fine steel wire, aromatic acrylic fiber or PBT.
  • the pipe has high pressure bearing capacity and good chemical resistance, and the pipe diameter DN is 800 mm or less.
  • the applicant of the present invention has applied a pressure tube and a processing method for reciprocating winding of a polyethylene sandwich reinforcing ribbed plate (CN102797917A, hereinafter referred to as the previous case).
  • the pipe provided in the previous case is different from the above three kinds of pipes, and the pipe of the pressure pipe
  • the wall comprises at least two layers of vertical and reverse spirally wound sandwich reinforcing ribs with a hot-melt joint layer, and a reinforcing rib uniformly distributed along the axial direction is further arranged between the upper and lower layers of the vertical and reverse spirally wound sandwich reinforcing ribs.
  • the length of the axial reinforcing rib is greater than or equal to the length of the pressure tube, and at least one layer of parallel reinforcing ribs is arranged in each layer of the sandwich reinforcing rib strip, and the reinforcing ribs in the upper and lower layers of the sandwich reinforcing ribs are spirally superposed. Interwoven mesh structure.
  • the object of the present invention is to provide a pressure winding tube and a molding method for hot winding forming of a composite winding belt, and to enhance the structural strength of the pressure tube.
  • the utility model relates to a composite winding belt hot-rolled forming pressure tube, which is characterized in that: the composite winding belt is wound into at least three layers of hot state to form a tubular shape, and the side edges of the composite wrapping belt of each layer are mutually entangled during winding Laminated and integrated after cooling, the composite wrapping tape of each layer comprises a thermoplastic substrate and a fiber ribbon composited in the substrate; wherein the extending directions of the fiber ribbons of the three composite wrapping tapes are mutually staggered to constitute ' M' shape.
  • the thermoplastic substrate is polyethylene or polypropylene.
  • the fiber ribbon is composed of or bundled with filaments which are glass fibers, fine steel wires, aromatic acrylic fibers or PBT.
  • the composite wrapping tape is a single layer longitudinal fiber ribbon structure, a multilayer longitudinal fiber ribbon structure, a single layer transverse fiber ribbon structure, a multilayer transverse fiber ribbon structure, a single layer oblique fiber ribbon structure, a multilayer oblique fiber ribbon structure, Single layer multidirectional interwoven fiber ribbon structure or multilayer multidirectional interwoven fiber ribbon structure.
  • the composite wrapping tape is continuously wound in a spiral shape or wound in sections in a vertical direction of the pressure tube.
  • winding directions between the layers of the composite wrapping tape are the same or opposite, and the composite winding tape structures used between the layers are of the same or different type.
  • a spiral rib is synchronously wound on the outer side of the outermost composite wrapping tape, and the rib is made of a polypropylene bellows or a metal hose, and is covered with a polyethylene or polypropylene material, and is externally The covered polyethylene or polypropylene material is integrally melted with the pressure tube.
  • the fiber strip in the composite wrapping tape is pre-punched with a continuous row of holes, and the thermoplastic substrate on the composite wrapping tape enters the row of holes in a hot-melt state, and becomes a pin after cooling and shaping, and is riveted and integrated. Chemical effect.
  • a composite winding method for forming a pressure tube with hot-wound forming characterized in that: the pressure tube is formed by superimposing and winding at least three layers of composite wrapping tape from inside to outside, and winding of the composite winding belt in each layer In the process, the composite wrapping tape is heated to a hot melt state, and then wound into a tubular shape, so that the sides of the composite wrapping tape are overlapped with each other during the winding process and are integrated after cooling; the composite wrapping tape includes a thermoplastic base. And a fiber ribbon composited in the substrate, wherein the fiber ribbons of the three composite winding tapes are staggered to form a 'm' shape.
  • the thermoplastic substrate is polyethylene or polypropylene.
  • the fiber ribbon is composed of or bundled with filaments which are glass fibers, fine steel wires, aromatic acrylic fibers or PBT.
  • the composite wrapping tape is a single layer longitudinal fiber ribbon structure, a multilayer longitudinal fiber ribbon structure, a single layer transverse fiber ribbon structure, a multilayer transverse fiber ribbon structure, a single layer oblique fiber ribbon structure, a multilayer oblique fiber ribbon structure, Single layer multidirectional interwoven fiber ribbon structure or multilayer multidirectional interwoven fiber ribbon structure.
  • the composite wrapping tape is continuously wound in a spiral shape or wound in sections in a vertical direction of the pressure tube.
  • winding directions between the layers of the composite wrapping tape are the same or opposite, and the composite winding tape structures used between the layers are of the same or different type.
  • a spiral rib is synchronously wound on the outer side of the outermost composite wrapping tape, and the rib is made of a polypropylene bellows or a metal hose, and is covered with a polyethylene or polypropylene material, and is externally The covered polyethylene or polypropylene material is integrally melted with the pressure tube.
  • the fiber strip in the composite wrapping tape is pre-punched with a continuous row of holes, and the thermoplastic substrate on the composite wrapping tape enters the row of holes in a hot-melt state, and becomes a pin after cooling and shaping, and is riveted and integrated. Chemical effect.
  • the invention has the beneficial effects that the multi-layer superimposed winding of the invention makes the layers of fibers interlace to form a 'm' shape, which can enhance the multi-directional arrangement of the fiber filaments, and the fiber filaments are combined with the substrate without delamination, and the tubes can be Withstand greater pressure and is suitable for making larger diameter pipes (eg DN300-3500mm).
  • Figure 1 is a plan view and a transverse cross-sectional view of a composite wound tape of a single layer longitudinal filament structure
  • FIGS. 2 and 2A are plan views and transverse cross-sectional views of a composite wound tape of a multilayer longitudinal filament structure
  • Figure 3 is a plan view of a composite wound tape of a single layer transverse filament structure
  • Figure 4 is a plan view of a composite wound tape of a multilayer transverse filament structure
  • Figure 5 and Figure 6 are plan views of a composite winding tape of a single layer or a plurality of layers of oblique fiber filament structures, respectively;
  • Figure 7 and Figure 7A are plan views of a composite winding tape of a single-layer or multi-layer multidirectional interwoven fiber structure, respectively;
  • Figure 8 is a cross-sectional view of a pipe wall of a pressure tube which is formed by a single layer of a composite winding tape of a single layer longitudinal filament structure;
  • Figure 9 is a cross-sectional view of a pipe wall of a pressure tube which is formed by a single-layer winding of a composite winding tape of a plurality of longitudinal filament structures;
  • Figure 10 is a longitudinal sectional view showing the wall of a pressure tube of a composite winding tape of a single-layer longitudinal filament structure
  • Figure 11 is a longitudinal cross-sectional view showing the wall of a pressure tube having a multi-layer winding of a composite winding tape of a plurality of longitudinal filament structures.
  • the pressure tube provided by the present invention is formed by winding at least three layers of hot winding of a composite wrapping tape, wherein the composite wrapping tape comprises a thermoplastic substrate 11 and a fiber ribbon 12 composited in the substrate, the thermoplastic substrate 11 It may be polyethylene or polypropylene, and the fiber ribbon 12 is composed of or bundled with fiber filaments, which may be glass fiber, fine steel wire, arylene fiber or PBT.
  • the composite wrapping tape can be classified into the following types according to the number of layers of the fiber ribbon 12 and the angular relationship between the fiber ribbon 12 and the winding direction L:
  • a composite winding tape having a single-layer longitudinal fiber ribbon 12 structure, the composite wrapping tape comprising a fiber ribbon 12, and the fiber ribbon 12 extending direction and the composite
  • the winding direction L of the wrapping tape is parallel;
  • a composite wrapping tape having a structure of a plurality of longitudinal fiber ribbons 12, the composite wrapping tape comprising at least two layers of fiber ribbons 12, and the extending direction of the fiber ribbons 12 and the The winding direction L of the composite wrapping tape is parallel;
  • the composite wrapping tape comprises a fiber ribbon 12, and the extending direction of the fiber ribbon 12 and the composite winding tape
  • the winding direction L is perpendicular
  • FIG. 4 it is a composite wrapping tape having a structure of a plurality of layers of transverse fiber ribbons 12, the composite wrapping tape comprising at least two layers of fiber ribbons 12, and the extending direction of the fiber ribbons 12 and the composite wrapping tape
  • the winding direction L is perpendicular;
  • a composite wrapping tape having a single layer or a plurality of layers of diagonal fiber ribbons 12, the composite wrapping tape comprising one or more layers of fiber ribbons 12, and the fiber ribbons 12
  • the extending direction is oblique to the winding direction L of the composite wrapping tape;
  • FIG. 7 and FIG. 7A it is a composite wrapping tape of a single-layer or multi-layer multi-directional interwoven fiber ribbon 12 structure, and the composite wrapping tape comprises one or more layers of fiber ribbons 12, and each layer is The fiber ribbon 12 has a plurality of mutually staggered extending directions.
  • the fiber ribbon 12 in the composite wrapping tape may be preliminarily provided with a continuous row of holes so that the thermoplastic substrate 11 on the wrapping tape can enter the row in a hot melt state. In the hole, after cooling and shaping, it becomes a pin and acts as a riveting integration.
  • the composite wrapping tape After obtaining the composite wrapping tape, the composite wrapping tape is heated to a hot melt state, and then wound into a tubular shape through at least three layers, so that the sides of the composite wrapping tape of each layer overlap each other during the winding process and are cooled. After the integration, the manufacture of the pressure tube is completed.
  • the composite wrapping tape is generally wound in a spiral shape, so that the winding process can be continued.
  • the winding is performed in the vertical direction of the pressure pipe, it is also a feasible technical solution.
  • the winding direction L between the layers of the composite wrapping tape may be the same (repetitive overlapping spiral winding) or vice versa (reciprocating spiral winding), and composite winding between layers
  • the belt types can also be the same or different.
  • the extending directions of the fiber ribbons 12 of the three-layer composite winding tape are mutually staggered to form a "m" shape, so that the respective characteristics of the pressure pipe are more balanced.
  • the fiber ribbon 12 of the first composite winding tape is wound in a 45-degree angular direction of the positive spiral, and the fiber ribbon 12 of the second composite winding tape is parallel to the axial direction. Wound, the fiber tape 12 of the third composite winding tape is wound at an angle of 45 degrees in the reverse spiral, so that the fiber ribbons 12 in the three-layer composite wrapping tape are interlaced to form a "m" shape.
  • the above three-layer composite wrapping tapes can be mutually interchanged, or one, two or three composite winding tapes can be replaced by a composite winding tape of a single-layer or multi-layer multi-directional interwoven fiber ribbon 12 structure, or the same can be achieved.
  • Technical effect can be achieved.
  • the composite winding tape of the single-layer longitudinal fiber ribbon 12 structure is a single-layer winding forming pressure tube
  • the multi-layer longitudinal fiber ribbon 12 is a composite winding tape single-layer winding.
  • the spiral rib 13 may be synchronously wound on the outer side of the last composite winding tape to increase the ring rigidity of the pressure pipe.
  • the rib 13 is composed of a polypropylene bellows or a metal hose as a skeleton, and is covered with a polyethylene or polypropylene material, and is integrally formed by externally covering the polyethylene or polypropylene material and the pressure tube. It can be used to enhance the rigidity of the pipe ring and improve the ability of the pipe to withstand external pressure.
  • the width of the composite wrapping tape may be between 10 and 1000 mm
  • the thickness of the composite wrapping tape may be between 1 mm and 30 mm
  • the diameter of the fiber filament may be between 0.005 and 2 mm
  • the thickness of the fiber ribbon 12 may be between 0.05-3mm.
  • the pressure pipe has a diameter range of DN300-3500mm, and the pressure pipe has a pressure bearing capacity of 0.01-5 MPa.
  • the fiber filament exists in the form of axial, circumferential, positive interlacing, oblique interlacing or multi-directional interlacing, which not only solves the circumferential pressure but also satisfies the requirements.
  • the axial direction and the force in the direction of the pipe corner are the most reasonable, which greatly improves the resistance of the pipe to internal pressure and reduces the material thickness of the pipe.
  • the high-strength fiber filaments are arranged in a multi-directional dense arrangement in the tube shaft wall to improve the comprehensive stress-receiving capacity of the pipe, that is, the reinforcing high-fiber wire is distributed along the tube wall wall in four directions: parallel, circumferential, left-handed and right-handed, respectively, to increase the composite pressure.
  • the circumferential pressure, axial tensile and circumferential distortion of the pipe are enhanced in multiple directions to achieve comprehensive force.
  • the single-layer or multi-layer superimposed winding high-strength fiber processing method is adopted, and the superimposed winding layer is added to improve the pressure bearing capacity of the pipe, and the large-diameter DN300-3500mm high-pressure and low-cost pipe material is realized.
  • Polyethylene and non-metal high-strength fibers can be recycled and recycled, and the pipes are non-toxic and safe.

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  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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Abstract

一种复合缠绕带热态缠绕成型的压力管及成型方法，压力管由至少三层复合缠绕带由内至外依次叠加缠绕而成，在每一层复合缠绕带的缠绕过程中，是将复合缠绕带加热至热熔状态，然后缠绕成型为管状，使复合缠绕带的侧边在缠绕过程中相互搭接并在冷却后融为一体，所述复合缠绕带包括热塑性基材（11）以及复合在基材（11）内的纤维带（12），其中三层复合缠绕带的纤维带（12）的延伸方向相互交错而构成"米"字形。本发明通过多层叠加缠绕，可增强纤维丝多向排布结构，纤维丝与基材结合不分层，管材可以承受更大的压力，适于制造更大直径的管材（如DN300-3500mm）。

Description

复合缠绕带热态缠绕成型的压力管及成型方法 技术领域
本发明涉及一种聚乙烯或聚丙烯压力管的结构及其成型方法。
背景技术
在给排水及化工管道，以及特殊介质的压力管道中，经常需要用到聚乙烯或聚丙烯压力管。
当前的热塑性材料（以聚乙烯为例）压力管主要有3大类管材形式和特点：
1.聚乙烯树脂压力管：
聚乙烯树脂压力管是全塑料管材，一体化材料结构均匀，化学性能稳定。由于聚乙烯材料抗拉强度较其它材料低，靠增加管材壁厚来提高管材的承压能力，管材成本高，管径DN在1600mm以下。
2：钢骨架（网）聚乙烯树脂压力管
钢骨架（网）聚乙烯树脂压力管是钢与塑料的复合管材，承压能力高，同时具有防腐功能，成本低。但热收缩率差别大，钢塑间结合力差，回收利用困难，管径DN在1600mm以下。
3：增强热塑性塑料管（RTP管）。
增强热塑性塑料管（RTP管）是管内外壁聚乙烯，中间夹层为制备单向排列连续纤维丝带左右螺旋多层交织的增强层。该增强材料玻璃纤维、细钢丝、芳腈纶、PBT等树脂纤维丝，该管材承压能力高，耐化学性能好，管材直径DN在800mm以下。
本发明的申请人曾申报一种聚乙烯夹心加强筋板带往复缠绕的压力管及加工方法（CN102797917A，以下称前案），前案提供的管材不同于以上3种管材，该压力管的管壁包括至少上下两层正反螺旋叠加缠绕的夹心加强筋板带热熔连接层，在上下两层正反螺旋叠加缠绕的夹心加强筋板之间还设有沿轴向均匀铺设的加强筋，轴向加强筋的长度大于或等于压力管的长度，在每层夹心加强筋板带内设置至少为一层的平行排列的加强筋，上下两层夹心加强筋板带内的加强筋螺旋叠加组成交织网状的结构。
然而，前案在制造的时候，当完成管壁的内侧部分的缠绕后，需要在管壁上环向排列多根轴向加强筋，然后反向缠绕完成管壁的外侧部分。
其中，环向排列多根轴向加强筋的步骤较为繁琐，影响加工效率，增加了制造成本。
 技术问题
本发明的目的在于：提供一种复合缠绕带热态缠绕成型的压力管及成型方法，增强压力管的结构强度。
技术解决方案
为实现上述目的，本发明采用的技术方案是：
一种复合缠绕带热态缠绕成型的压力管，其特征在于：是由复合缠绕带至少三层热态缠绕而成型为管状，每一层的所述复合缠绕带的侧边在缠绕过程中相互搭接并在冷却后融为一体，每一层的所述复合缠绕带包括热塑性基材以及复合在基材内的纤维带；其中三层复合缠绕带的纤维带的延伸方向相互交错而构成'米'字形。
在较佳的技术方案中：
所述热塑性基材为聚乙烯或聚丙烯。
所述纤维带是由纤维丝集束构成或交织构成，所述纤维丝为玻璃纤维、细钢丝、芳腈纶或 PBT 。
所述复合缠绕带是单层纵向纤维带结构、多层纵向纤维带结构、单层横向纤维带结构、多层横向纤维带结构、单层斜向纤维带结构、多层斜向纤维带结构、单层多向交织纤维带结构或多层多向交织纤维带结构。
所述复合缠绕带沿螺旋状持续缠绕，或沿压力管的垂直方向分段缠绕。
各层复合缠绕带之间的缠绕方向相同或者相反，而且各层之间采用的复合缠绕带结构类型相同或者不同。
在最外层的复合缠绕带的外侧同步缠绕有螺旋状的肋筋，所述肋筋是以聚丙烯波纹管或金属软管为骨架，外覆聚乙烯或聚丙烯材料而构成，并通过外覆的所述聚乙烯或聚丙烯材料与压力管热熔为一体结构。
所述复合缠绕带中的纤维带上预先打有连续的排孔，所述复合缠绕带上的热塑性基材在热熔状态下进入所述排孔中，冷却定型后成为销钉，起到铆接一体化作用。
本发明提供的技术方案还包括：
一种复合缠绕带热态缠绕成型的压力管的成型方法，其特征在于：所述压力管由至少三层复合缠绕带由内至外依次叠加缠绕而成，在每一层复合缠绕带的缠绕过程中，是将复合缠绕带加热至热熔状态，然后缠绕成型为管状，使复合缠绕带的侧边在缠绕过程中相互搭接并在冷却后融为一体；所述复合缠绕带包括热塑性基材以及复合在基材内的纤维带，其中三层复合缠绕带的纤维带的延伸方向相互交错而构成'米'字形。
在较佳的技术方案中：
所述热塑性基材为聚乙烯或聚丙烯。
所述纤维带是由纤维丝集束构成或交织构成，所述纤维丝为玻璃纤维、细钢丝、芳腈纶或 PBT 。
所述复合缠绕带是单层纵向纤维带结构、多层纵向纤维带结构、单层横向纤维带结构、多层横向纤维带结构、单层斜向纤维带结构、多层斜向纤维带结构、单层多向交织纤维带结构或多层多向交织纤维带结构。
所述复合缠绕带沿螺旋状持续缠绕，或沿压力管的垂直方向分段缠绕。
各层复合缠绕带之间的缠绕方向相同或者相反，而且各层之间采用的复合缠绕带结构类型相同或者不同。
在最外层的复合缠绕带的外侧同步缠绕有螺旋状的肋筋，所述肋筋是以聚丙烯波纹管或金属软管为骨架，外覆聚乙烯或聚丙烯材料而构成，并通过外覆的所述聚乙烯或聚丙烯材料与压力管热熔为一体结构。
所述复合缠绕带中的纤维带上预先打有连续的排孔，所述复合缠绕带上的热塑性基材在热熔状态下进入所述排孔中，冷却定型后成为销钉，起到铆接一体化作用。
有益效果
本发明具有的有益效果是：本发明多层叠加缠绕，使各层纤维性相互交错构成'米'字形，可增强纤维丝多向排布结构，纤维丝与基材结合不分层，管材可以承受更大的压力，适于制造更大直径的管材（如 DN300-3500mm ）。
附图说明
图1、图1A是单层纵向纤维丝结构的复合缠绕带的平面图及其横向剖视图；
图2、图2A是多层纵向纤维丝结构的复合缠绕带的平面图及其横向剖视图；
图3是单层横向纤维丝结构的复合缠绕带的平面图；
图4是多层横向纤维丝结构的复合缠绕带的平面图；
图5、图6分别是单层或多层斜向纤维丝结构的复合缠绕带的平面图；
图7、图7A分别是单层或多层多向交织纤维丝结构的复合缠绕带的平面图；
图8是由单层纵向纤维丝结构的复合缠绕带单层缠绕成型的压力管的管壁横剖示意图；
图9是由多层纵向纤维丝结构的复合缠绕带单层缠绕成型的压力管的管壁横剖示意图；
图10是由单层纵向纤维丝结构的复合缠绕带多层缠绕成型的压力管的管壁纵剖示意图；
图11是由多层纵向纤维丝结构的复合缠绕带多层缠绕成型的压力管的管壁纵剖示意图。
 本发明的最佳实施方式
本发明提供的压力管，是由复合缠绕带经至少三层热态缠绕成型而成，其中的复合缠绕带包括热塑性基材11以及复合在基材内的纤维带12，所述热塑性基材11可为聚乙烯或聚丙烯，所述纤维带12是由纤维丝集束构成或交织构成，所述纤维丝可为玻璃纤维、细钢丝、芳腈纶或PBT。
其中，所述复合缠绕带，根据纤维带12的层数以及纤维带12与缠绕方向L之间的角度关系，可分为如下几种类型：
如图1、图1A所示，是一种单层纵向纤维带12结构的复合缠绕带，所述复合缠绕带中包含一层纤维带12，而且所述纤维带12的延伸方向与所述复合缠绕带的缠绕方向L相平行；
如图2、图2A所示，是一种多层纵向纤维带12结构的复合缠绕带，所述复合缠绕带中包含至少两层纤维带12，而且所述纤维带12的延伸方向与所述复合缠绕带的缠绕方向L相平行；
如图3所示，是一种单层横向纤维带12结构的复合缠绕带，所述复合缠绕带中包含一层纤维带12，而且所述纤维带12的延伸方向与所述复合缠绕带的缠绕方向L相垂直；
如图4所示，是一种多层横向纤维带12结构的复合缠绕带，所述复合缠绕带中包含至少两层纤维带12，而且所述纤维带12的延伸方向与所述复合缠绕带的缠绕方向L相垂直；
如图5、图6所示，是一种单层或多层斜向纤维带12结构的复合缠绕带，所述复合缠绕带中包含一层或多层纤维带12，而且所述纤维带12的延伸方向与所述复合缠绕带的缠绕方向L斜交；
如图7、图7A所示，是一种单层或多层多向交织纤维带12结构的复合缠绕带，所述复合缠绕带中包含一层或多层纤维带12，而且每一层所述纤维带12具有多个相互交错的延伸方向。
在上述各种结构的复合缠绕带中，复合缠绕带中的纤维带12上还可以预先打有连续的排孔，使得缠绕带上的的热塑性基材11在热熔状态下能够进入所述排孔中，冷却定型后成为销钉，起到铆接一体化作用。
得到上述复合缠绕带之后，将所述复合缠绕带加热至热熔状态，然后经至少三层缠绕成型为管状，使每一层的复合缠绕带的侧边在缠绕过程中相互搭接并在冷却后融为一体，即完成压力管的制造。
上述每一层的缠绕过程中，所述复合缠绕带一般沿螺旋状缠绕，使缠绕过程可以持续进行，当然，若沿压力管的垂直方向缠绕分段进行，也是可行的技术方案。
在具有至少三层复合缠绕带的压力管中，各层复合缠绕带之间的缠绕方向L可以相同（重复重叠螺旋缠绕）也可以相反（往复螺旋缠绕），而且各层之间采用的复合缠绕带类型也可相同或者不同。但是，在得到的压力管中，最好使其中三层复合缠绕带的纤维带12的延伸方向相互交错而构成“米”字形，以使压力管的各向特性更为均衡。
例如，假设制造具有三层复合缠绕带的压力管时，第一层复合缠绕带的纤维带12沿正螺旋45度角方向缠绕，第二层复合缠绕带的纤维带12沿平行于轴向方向缠绕，第三层复合缠绕带的纤维带12沿反螺旋45度角方向缠绕，即可使所述三层复合缠绕带中的纤维带12相互交错而构成“米”字形。
当然，上述三层复合缠绕带可以相互交互位置，或者其中一层、两层或者三层复合缠绕带以单层或多层多向交织纤维带12结构的复合缠绕带予以替换，也可以达到相同的技术效果。
如图8、图9、图10、图11所示，分别是单层纵向纤维带12结构的复合缠绕带单层缠绕成型的压力管、多层纵向纤维带12结构的复合缠绕带单层缠绕成型的压力管、单层纵向纤维带12结构的复合缠绕带多层缠绕成型的压力管以及多层纵向纤维带12结构的复合缠绕带多层缠绕成型的压力管的管壁纵剖示意图。
此外，在压力管进行最后一层复合缠绕带的缠绕的同时，还可以在所述最后一层复合缠绕带的外侧同步缠绕螺旋状的肋筋13，以提高压力管的环刚度。
所述肋筋13是以聚丙烯波纹管或金属软管为骨架，外覆聚乙烯或聚丙烯材料而构成，并通过外覆的所述聚乙烯或聚丙烯材料与压力管热熔为一体结构，可用于增强管材环刚度，提高管材承受外部压力的能力。
上述实施例中，所述复合缠绕带的宽度可介于10-1000mm，复合缠绕带的厚度可介于1mm-30mm，纤维丝的直径可介于0.005-2mm，纤维带12的厚度可介于0.05-3mm。所述压力管直径范围DN300-3500mm，压力管承压能力为0.01-5MPa。
本发明的优势和特点：
压力管的热塑性材料与纤维丝复合形成的管壁中，纤维丝以轴向、环向、正交织、斜交织或多种方向复合交织的形式存在，既解决了环向承压同时也满足了轴向以及在管道转角方向的受力，受力结构最合理，极大提高管材的抗内压能力，减少管材壁厚节约材料。
高强纤维丝在管轴壁内多向密集排列分布提高管材综合受力能力，即增强高纤维丝沿着管轴壁呈：平行、环向、左旋、右旋四个方向分布，分别提高复合压力管材的环向承压、轴向抗拉、环向扭曲，多方向增强实现综合受力的能力。
采取单层或多层叠加缠绕复合高强纤维丝加工方法，通过增加叠加缠绕层来提高管材承压力能力，实现大口径DN300-3500mm高承压、低成本的管材。
聚乙烯和非金属高强纤维可回收循环再利用，管材无毒和析出卫生环保。
以上实施例仅仅是对本发明进行说明，而非作限制性的概括，本领域普通技术人员在本发明的发明构思的指导下，还可以作出很多常规结构上的修改与替换，这些修改与替换也应当被认为属于本发明的保护范围之中。
 本发明的实施方式
工业实用性
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Claims (16)

  1. 一种复合缠绕带热态缠绕成型的压力管，其特征在于：是由复合缠绕带至少三层热态缠绕而成型为管状，每一层的所述复合缠绕带的侧边在缠绕过程中相互搭接并在冷却后融为一体，每一层的所述复合缠绕带包括热塑性基材以及复合在基材内的纤维带；其中三层复合缠绕带的纤维带的延伸方向相互交错而构成“米”字形。
  2. 根据权利要求1所述的复合缠绕带热态缠绕成型的压力管，其特征在于：所述热塑性基材为聚乙烯或聚丙烯。
  3. 根据权利要求1所述的复合缠绕带热态缠绕成型的压力管，其特征在于：所述纤维带是由纤维丝集束构成或交织构成，所述纤维丝为玻璃纤维、细钢丝、芳腈纶或PBT。
  4. 根据权利要求1所述的复合缠绕带热态缠绕成型的压力管，其特征在于：所述复合缠绕带是单层纵向纤维带结构、多层纵向纤维带结构、单层横向纤维带结构、多层横向纤维带结构、单层斜向纤维带结构、多层斜向纤维带结构、单层多向交织纤维带结构或多层多向交织纤维带结构。
  5. 根据权利要求1或4所述的复合缠绕带热态缠绕成型的压力管，其特征在于：所述复合缠绕带沿螺旋状持续缠绕，或沿压力管的垂直方向分段缠绕。
  6. 根据权利要求4所述的复合缠绕带热态缠绕成型的压力管，其特征在于：各层复合缠绕带之间的缠绕方向相同或者相反，而且各层之间采用的复合缠绕带结构类型相同或者不同。
  7. 根据权利要求2所述的复合缠绕带热态缠绕成型的压力管，其特征在于：在最外层的复合缠绕带的外侧同步缠绕有螺旋状的肋筋，所述肋筋是以聚丙烯波纹管或金属软管为骨架，外覆聚乙烯或聚丙烯材料而构成，并通过外覆的所述聚乙烯或聚丙烯材料与压力管热熔为一体结构。
  8. 根据权利要求4所述的复合缠绕带热态缠绕成型的压力管，其特征在于：所述复合缠绕带中的纤维带上预先打有连续的排孔，所述复合缠绕带上的热塑性基材在热熔状态下进入所述排孔中，冷却定型后成为销钉，起到铆接一体化作用。
  9. 一种复合缠绕带热态缠绕成型的压力管的成型方法，其特征在于：所述压力管由至少三层复合缠绕带由内至外依次叠加缠绕而成，在每一层复合缠绕带的缠绕过程中，是将复合缠绕带加热至热熔状态，然后缠绕成型为管状，使复合缠绕带的侧边在缠绕过程中相互搭接并在冷却后融为一体；所述复合缠绕带包括热塑性基材以及复合在基材内的纤维带，其中三层复合缠绕带的纤维带的延伸方向相互交错而构成“米”字形。
  10. 根据权利要求9所述的复合缠绕带热态缠绕成型的压力管，其特征在于：所述热塑性基材为聚乙烯或聚丙烯。
  11. 根据权利要求9所述的复合缠绕带热态缠绕成型的压力管，其特征在于：所述纤维带是由纤维丝集束构成或交织构成，所述纤维丝为玻璃纤维、细钢丝、芳腈纶或PBT。
  12. 根据权利要求9所述的复合缠绕带热态缠绕成型的压力管，其特征在于：所述复合缠绕带是单层纵向纤维带结构、多层纵向纤维带结构、单层横向纤维带结构、多层横向纤维带结构、单层斜向纤维带结构、多层斜向纤维带结构、单层多向交织纤维带结构或多层多向交织纤维带结构。
  13. 根据权利要求9或12所述的复合缠绕带热态缠绕成型的压力管，其特征在于：所述复合缠绕带沿螺旋状持续缠绕，或沿压力管的垂直方向分段缠绕。
  14. 根据权利要求12所述的复合缠绕带热态缠绕成型的压力管，其特征在于：各层复合缠绕带之间的缠绕方向相同或者相反，而且各层之间采用的复合缠绕带结构类型相同或者不同。
  15. 根据权利要求9所述的复合缠绕带热态缠绕成型的压力管，其特征在于：在最外层的复合缠绕带的外侧同步缠绕有螺旋状的肋筋，所述肋筋是以聚丙烯波纹管或金属软管为骨架，外覆聚乙烯或聚丙烯材料而构成，并通过外覆的所述聚乙烯或聚丙烯材料与压力管热熔为一体结构。
  16. 根据权利要求12所述的复合缠绕带热态缠绕成型的压力管，其特征在于：所述复合缠绕带中的纤维带上预先打有连续的排孔，所述复合缠绕带上的热塑性基材在热熔状态下进入所述排孔中，冷却定型后成为销钉，起到铆接一体化作用。
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