WO2017012214A1 - 麻缠绕复合管 - Google Patents

麻缠绕复合管 Download PDF

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Publication number
WO2017012214A1
WO2017012214A1 PCT/CN2015/092317 CN2015092317W WO2017012214A1 WO 2017012214 A1 WO2017012214 A1 WO 2017012214A1 CN 2015092317 W CN2015092317 W CN 2015092317W WO 2017012214 A1 WO2017012214 A1 WO 2017012214A1
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Prior art keywords
hemp
reinforcing layer
layer
composite pipe
filler
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PCT/CN2015/092317
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English (en)
French (fr)
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叶柃
牛琳
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浙江鑫宙竹基复合材料科技有限公司
叶柃
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Application filed by 浙江鑫宙竹基复合材料科技有限公司, 叶柃 filed Critical 浙江鑫宙竹基复合材料科技有限公司
Priority to CA2987828A priority Critical patent/CA2987828C/en
Publication of WO2017012214A1 publication Critical patent/WO2017012214A1/zh
Priority to US15/785,406 priority patent/US10215312B2/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • 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
    • F16L9/01—Rigid pipes of wood

Definitions

  • the utility model relates to the field of industrial pipelines, in particular to a hemp wound composite pipe.
  • the pipelines used are generally steel pipes, ductile iron pipes, polyethylene pipes, polyvinyl chloride pipes, cement pipes, steel-lined cement pipes, and glass steel. Pipe, glass fiber reinforced plastic sand pipe, etc.
  • the production process of raw materials for steel pipes and ductile iron pipes will discharge a large amount of waste gas, waste water and waste slag, causing serious environmental pollution, and the weight of the pipe body is large, the transportation cost is high, and the construction is difficult;
  • the polyethylene pipe and the polyvinyl chloride pipe raw material They are synthetic products of petroleum products, which consume petroleum resources; cement pipes and steel-lined cement pipes are easy to leak, causing environmental pollution, heavy weight, high transportation cost, and difficult construction; glass steel pipes and glass fiber reinforced plastic sand pipes are made of high energy consumption. Made of fiberglass, it consumes oil resources, and the products and wastes are not recyclable and environmentally friendly. Therefore, the pipelines currently used generally have the disadvantage of consuming petroleum resources and being environmentally friendly.
  • the present invention has been made in view of the above problems, and an object thereof is to provide a green and environmentally-friendly hemp-wound composite pipe, which replaces the existing industrial pipeline that consumes petroleum resources and is not environmentally friendly, thereby saving oil resources and reducing environmental pollution.
  • a hemp-wound composite pipe which comprises, in order from the inside to the outside, an inner liner layer, a reinforcing layer and an outer protective layer, the reinforcing layer being made of hemp
  • the skin is joined into a continuous hemp belt wound around the inner layer of the hemp layer.
  • the hemp-wound composite pipe proposed by the above technical solution of the present invention adopts a buck of natural plant hemp with good strength as a reinforcing material, and can be processed into a pipeline by using a winding process capable of fully exerting its tensile strength, and is environmentally friendly. Light weight, convenient transportation and construction, can replace some existing industrial pipelines that consume oil resources and are not environmentally friendly, thus saving oil resources and reducing environmental pollution.
  • the hemp skin is connected into a continuous long hemp belt for winding processing, which facilitates continuous production and improves production efficiency.
  • the hemp skin on the hemp belt is arranged in a forward and reverse alternating parallel arrangement.
  • the hemp stem has a certain taper
  • the peeled hemp skin is flattened and has a ladder shape with one end wide and one end narrow.
  • the mechanical strength of the hemp skin is also strong at the root and slightly weaker, in order to ensure the strength of the hemp belt.
  • the distribution is uniform, so that the strength of the entangled composite pipe wall is uniform, and the hemp skin is alternately arranged in parallel and in parallel, and can be compensated for each other in shape and strength.
  • the reinforcing layer is composed of an annular reinforcing layer and a spiral cross-shaped reinforcing layer, wherein the hemp belts in the annular reinforcing layer are wound in a circular arrangement, and the hemp belts in the spiral cross-shaped reinforcing layer are spirally wound.
  • the spiral cross-shaped winding can make the stress distribution uniform in all directions, and the annular arrangement winding can increase the hoop tensile and compressive strength of the pipe body. Since hemp has the characteristics of anisotropy of natural plants, it is preferable to adopt a spiral cross shape.
  • the winding and the annular arrangement are wound and wound in two ways, which not only compensates for the strength in all directions, but also enhances the compressive tensile strength in the circumferential direction.
  • an auxiliary reinforcing layer is further included between the reinforcing layers, and the auxiliary reinforcing layer is a cement layer formed by mixing a resin and a filler. Since the elastic modulus of hemp itself is small, in order to meet higher mechanical requirements, it is necessary to increase the auxiliary reinforcement layer to make the obtained tube rigid and strong. The degree is higher, and a filler which can function to increase strength and rigidity is used as a main reinforcing material for the auxiliary reinforcing layer.
  • the filler is an inorganic filler or a natural vegetable filler.
  • the use of high-strength, non-polluting inorganic fillers or natural plant fillers not only improves the mechanical properties of the product, but also is environmentally friendly.
  • the natural plant filler is one or more of wood chips, wood flour, bamboo chips, bamboo powder, and vegetable fruit shell powder.
  • the above several natural plant fillers have good strength, low material cost and are easily available.
  • 1 is a schematic view showing the radial structure of a hemp-wound composite pipe according to the first embodiment of the present invention.
  • FIG. 2 is a schematic view showing the radial structure of the hemp-wound composite pipe according to the second embodiment of the present invention.
  • FIG. 3 is a schematic view showing three arrangements of the hemp skin on the hemp belt according to the embodiment of the present invention.
  • Example 1 Preparation of a hemp-wound composite pipe with a nominal diameter of 150 mm and a pressure rating of 0.4 MPa
  • the radial structure of the pipe body is an inner liner layer 1, a spiral cross-shaped reinforcing layer 2, an annular reinforcing layer 3, and an outer protective layer 4 from the inside to the outside.
  • the preparation steps are as follows:
  • Hemp pretreatment After the mesodermal peeling of the mechanical stripping is dried, the forward and reverse alternately arranged in parallel on the mesh cloth, and the arrangement of the hemp skin is as shown in Fig. 3, and one of them may be selected. Made into a continuous long hemp belt spare;
  • inner liner layer 1 uniformly coating a release mold on a polished steel mold having an outer diameter of 150 mm to form a release layer, and then winding it with a knitted felt and a non-woven fabric impregnated with an anticorrosive resin. 1 layer on the mold layer to a thickness of 0.3mm, forming an inner liner layer 1 after initial curing;
  • outer protective layer 4 A layer of anticorrosive waterproof resin is uniformly sprayed on the surface of the pipe body, and the thickness is about 1.0 mm, and the outer protective layer 4 is formed, and then demolded.
  • the short-time failure water pressure of the obtained hemp-wound composite pipe reaches 0.4 MPa, the stiffness reaches 5000 N/m 2 , and the circumferential tensile strength reaches 120 KN/m, reaching the technical index of the pressure pipeline.
  • Example 2 Preparation of a hemp-wound composite pipe with a nominal diameter of 1400 mm and a pressure rating of 0.6 MPa
  • the radial structure of the pipe body is, from the inside to the outside, an inner liner 1, a spiral cross-shaped reinforcing layer 2, an auxiliary reinforcing layer 5, an annular reinforcing layer 3, and an outer protective layer 4.
  • the preparation steps are as follows:
  • inner liner layer 1 uniformly coating a release mold on a polished steel mold having an outer diameter of 1400 mm, and then winding a release layer with a knitted felt and a non-woven fabric coated with an anticorrosive resin. 3-4 layers on the mold layer to a thickness of 1.5mm, after the initial curing, forming the inner liner layer 1;
  • the winding thickness is 30 mm;
  • auxiliary reinforcing layer 5 mixing with resin and inorganic filler or natural plant filler to form clay, inorganic filler can use stone powder, ore, etc.
  • Natural plant filler can use wood chips, wood flour, bamboo chips, bamboo powder, plant fruit
  • the filler mass ratio is 70%-90%, and the resin mass ratio is 10%-30%; in the embodiment, the ore is selected as the filler, and the mixed clay is uniformly attached to the shell.
  • the lining cloth to which the cement is attached is wrapped on the spiral cross-shaped reinforcing layer 2 and compacted and compacted to a thickness of 10 mm to form an auxiliary reinforcing layer 5;
  • outer protective layer 4 A layer of asphalt is uniformly sprayed on the surface of the pipe body, and the thickness is about 1.5 mm, and the outer protective layer 4 is formed, and then demolded.
  • the short-time failure water pressure of the obtained hemp-wound composite pipe reaches 0.6 MPa, the stiffness reaches 7500 N/m 2 , and the circumferential tensile strength reaches 1680 KN/m, reaching the technical index of the pressure pipeline.
  • Example 3 Preparation of a hemp-wound composite pipe with a nominal diameter of 1400 mm and a pressure rating of 0.6 MPa
  • the auxiliary reinforcing layer 5 in the second embodiment is prepared by uniformly spreading the filler directly on the surface of the spiral cross-shaped reinforcing layer 2, spraying the resin while sprinkling, and then wrapping and tightening with a lining cloth to obtain a final film.
  • Others are the same as the second embodiment.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)

Abstract

一种麻缠绕复合管，该管的径向由内至外依次包括内衬层（1）、增强层（2、3）和外防护层（4），增强层（2、3）是由麻皮连接成连续的麻皮带缠绕在内衬层上形成的麻皮层。为了进一步增大制得管体的强度和刚度，在增强层（2、3）之间还包括辅助增强层（5），辅助增强层（5）是由树脂和填料混合而成的胶泥层。该管涉及工业管道领域，绿色环保，资源可再生，制得的管体质量轻，运输和安装方便；用以代替现有的消耗石油资源、不环保的工业管道，从而起到节省石油资源，减少环境污染的作用。

Description

麻缠绕复合管 【技术领域】
本实用新型涉及工业管道领域，尤其涉及一种麻缠绕复合管。
【背景技术】
目前在城市给排水、水利、农田灌溉、石油污水处理、工业循环水等领域，所用的管道普遍为钢管、球墨铸铁管、聚乙烯管、聚氯乙烯管、水泥管、钢衬水泥管、玻璃钢管、玻璃钢夹砂管等。其中，钢管和球墨铸铁管的原料的生产过程会排放大量的废气、废水、废渣，造成严重的环境污染，并且管体重量大，运输成本高，施工困难；聚乙烯管和聚氯乙烯管原料均为石油产品的合成品，消耗石油资源；水泥管和钢衬水泥管易渗漏，造成环境污染，且重量大，运输成本高，施工困难；玻璃钢管和玻璃钢夹砂管是由具有高能耗的玻璃纤维制成，消耗石油资源，且产品及废料不可回收、不环保。因此，目前所用的管道普遍具有消耗石油资源、不环保的缺点。
【实用新型内容】
本实用新型鉴于上述问题而完成，其目的在于提供一种绿色环保的麻缠绕复合管，代替现有的消耗石油资源、不环保的工业管道，从而起到节省石油资源，减少环境污染的作用。
根据本实用新型的一个方面，提出了一种麻缠绕复合管，其径向由内至外依次包括内衬层、增强层和外防护层，所述的增强层是由麻 皮连接成连续的麻皮带缠绕在内衬层上形成的麻皮层。
本实用新型上述技术方案提出的麻缠绕复合管，采用强度好的天然植物麻的韧皮作为增强材料，利用能够使其拉伸强度充分发挥出来的缠绕工艺使其能够加工成管道，绿色环保，质量轻，运输及施工都很方便，可以代替一部分现有的消耗石油资源、不环保的工业管道，从而起到节省石油资源，减少环境污染的作用。将麻皮连接成连续长的麻皮带进行缠绕加工，方便连续化生产，提高生产效率。
可选地，所述的麻皮带上的麻皮呈正向、反向交替平行排列布置。由于麻茎具有一定的锥度，剥下的麻皮干燥后展平呈一端宽一端窄的梯形状，麻皮自身的力学强度也是根部较强，稍部较弱，为了保证制得的麻皮带强度分布均匀，从而使缠绕出的复合管管壁各处强度均匀，将麻皮正反向交替平行排列铺设，在形状上和强度上都可以互相弥补。
可选地，所述的增强层由环形增强层和螺旋交叉形增强层组成，环形增强层中的麻皮带呈环形排列缠绕，螺旋交叉形增强层中的麻皮带呈螺旋交叉形缠绕。螺旋交叉形缠绕可以使各个方向上应力分布均匀，环形排列缠绕可以增大管体的环向抗拉和抗压强度，由于麻作为天然植物自身具有各向异性的特点，所以优选采用螺旋交叉形缠绕和环形排列缠绕两种组合缠绕的方式加工生产，既弥补各方向上的强度，又增强环向的抗压抗拉强度。
可选地，在所述的增强层之间还包括辅助增强层，所述的辅助增强层是由树脂和填料混合而成的胶泥层。由于麻自身的弹性模量较小，为了满足更高力学要求，需要增加辅助增强层使制得的管体刚度和强 度更高，利用可以起到增大强度和刚度作用的填料作为辅助增强层的主要增强材料。
可选地，所述的填料为无机填料或天然植物填料。选用强度高、无污染的无机填料或天然植物填料既提高了产品的力学性能，又绿色环保。
可选地，所述的天然植物填料是木片、木粉、竹片、竹粉、植物果壳粉中的一种或几种。上述几种天然植物填料强度好，材料成本低，容易获得。
【附图说明】
为了更清楚的说明本实用新型实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本实用新型的一些实施例，而非对本实用新型的限制。
图1是本实用新型实施例一提出的麻缠绕复合管径向结构示意图。
图2是本实用新型实施例二提出的麻缠绕复合管径向结构示意图。
图3是本实用新型实施例提出的麻皮带上的麻皮三种排列方式示意图。
【具体实施方式】
下面对本实用新型实施例中的技术方案进行清楚、完整的描述。显然，所描述的实施例仅仅是本实用新型一部分实施例，而不是全部实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，也属于本实用新型保 护的范围。
实施例一：制备公称直径150mm、压力等级0.4MPa的麻缠绕复合管
如图1所示，管体径向结构由内至外依次为内衬层1，螺旋交叉形增强层2，环形增强层3，外防护层4。制备步骤如下：
(1)麻皮预处理：将机械化剥取的麻皮干燥处理后正向、反向交替平行排列黏贴在网格布上，麻皮排列方式如图3所示，任选其中一种，制成连续长的麻皮带备用；
(2)制备内衬层1：在外径为150mm的经抛光的钢制模具上均匀涂上一层脱模剂形成脱膜层，之后用淋有防腐树脂的针织毡和无纺布缠绕在脱模层上1层至厚度0.3mm，加温初固化后形成内衬层1；
(3)制备螺旋交叉形增强层2：缠绕机树脂槽内加入树脂；将麻皮带装在缠绕机上退卷，先通过树脂槽并涂上树脂，然后在内衬层1上螺旋交叉形缠绕至4mm厚度，形成螺旋交叉形增强层2；
(4)制备环形增强层3：继续环形缠绕麻皮带至2mm厚度，形成环形增强层3；
(5)固化：将管体加热固化，树脂交联固化后，对管体进行表面打磨修整；
(6)制备外防护层4：在管体表面均匀喷涂一层防腐防水树脂，厚度约为1.0mm，形成外防护层4，之后脱模。
制得的麻缠绕复合管短时失效水压达到0.4MPa，刚度达到5000N/m2，环向抗拉强力达到120KN/m，达到压力管道的技术指标。
实施例二：制备公称直径1400mm、压力等级0.6MPa的麻缠绕复合管
如图2所示，管体径向结构由内至外依次为内衬层1，螺旋交叉形增强层2，辅助增强层5，环形增强层3，外防护层4。制备步骤如下：
(1)麻皮预处理：同实施例一；
(2)制备内衬层1：在外径为1400mm的经抛光的钢制模具上均匀涂上一层脱模剂形成脱模层，之后用淋有防腐树脂的针织毡和无纺布缠绕在脱模层上3-4层至厚度1.5mm，加温初固化后形成内衬层1；
(3)制备螺旋交叉形增强层2：同实施例一，缠绕厚度为30mm；
(4)制备辅助增强层5：用树脂和无机填料或天然植物填料混合搅拌成胶泥，无机填料可以选用石粉、矿砂等，天然植物填料可以选用木片、木粉、竹片、竹粉、植物果壳粉中的一种或几种，填料质量比为70％-90％，树脂质量比为10％-30％；在本实施例中，选用矿砂作为填料，将混合好的胶泥均匀的附着在一层衬布上，将附着有该胶泥的衬布包裹在螺旋交叉形增强层2上并拉紧压实，包裹至10mm的厚度，制成辅助增强层5；
(5)制备环形增强层3：同实施例一，缠绕厚度为20mm；
(6)固化：同实施例一；
(7)制备外防护层4：在管体表面均匀喷涂一层沥青，厚度约为1.5mm，形成外防护层4，之后脱模。
制得的麻缠绕复合管短时失效水压达到0.6MPa，刚度达到7500N/m2，环向抗拉强力达到1680KN/m，达到压力管道的技术指标。
实施例三：制备公称直径1400mm、压力等级0.6MPa的麻缠绕复合管
实施例二中的辅助增强层5的制备方法为将填料直接均匀地撒在螺旋交叉形增强层2的表面，边撒边同时喷淋树脂，之后用衬布包裹住并拉紧压实，最终制成10mm厚的辅助增强层5。其他同实施例二。
以上所述仅为本发明的具体实施例，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明实施例公开的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明保护范围内。

Claims (6)

  1. 一种麻缠绕复合管，其径向由内至外依次包括内衬层、增强层和外防护层，所述的增强层是由麻皮连接成连续的麻皮带缠绕在内衬层上形成的麻皮层。
  2. 如权利要求1所述的麻缠绕复合管，其特征在于，所述的麻皮带上的麻皮呈正向、反向交替平行排列布置。
  3. 如权利要求1所述的麻缠绕复合管，其特征在于，所述的增强层由环形增强层和螺旋交叉形增强层组成，环形增强层中的麻皮带呈环形排列缠绕，螺旋交叉形增强层中的麻皮带呈螺旋交叉形缠绕。
  4. 如权利要求1、2或3所述的麻缠绕复合管，其特征在于，在所述的增强层之间还包括辅助增强层，所述的辅助增强层是由树脂和填料混合而成的胶泥层。
  5. 如权利要求4所述的麻缠绕复合管，其特征在于，所述的填料为无机填料或天然植物填料。
  6. 如权利要求5所述的麻缠绕复合管，其特征在于，所述的天然植物填料是木片、木粉、竹片、竹粉、植物果壳粉中的一种或几种。
PCT/CN2015/092317 2015-07-23 2015-10-20 麻缠绕复合管 WO2017012214A1 (zh)

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