WO2021179278A1 - 保护管 - Google Patents

保护管 Download PDF

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Publication number
WO2021179278A1
WO2021179278A1 PCT/CN2020/079136 CN2020079136W WO2021179278A1 WO 2021179278 A1 WO2021179278 A1 WO 2021179278A1 CN 2020079136 W CN2020079136 W CN 2020079136W WO 2021179278 A1 WO2021179278 A1 WO 2021179278A1
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WO
WIPO (PCT)
Prior art keywords
weft
fluffy
yarns
yarn
warp
Prior art date
Application number
PCT/CN2020/079136
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English (en)
French (fr)
Inventor
高耀军
张宝辉
杨凤凯
杨巧云
彭俊杰
周维
龙伯森
Original Assignee
深圳市骏鼎达新材料股份有限公司
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Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=71653777&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2021179278(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 深圳市骏鼎达新材料股份有限公司 filed Critical 深圳市骏鼎达新材料股份有限公司
Priority to US16/769,365 priority Critical patent/US11643758B2/en
Priority to CN202080000263.6A priority patent/CN111448730B/zh
Priority to PCT/CN2020/079136 priority patent/WO2021179278A1/zh
Publication of WO2021179278A1 publication Critical patent/WO2021179278A1/zh

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00—Woven fabrics designed to make specified articles
    • D03D1/0035—Protective fabrics
    • D03D1/0043—Protective fabrics for elongated members, i.e. sleeves
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00—Woven fabrics designed to make specified articles
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/49—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads textured; curled; crimped
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D3/00—Woven fabrics characterised by their shape
    • D03D3/02—Tubular fabrics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0406—Details thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0462—Tubings, i.e. having a closed section
    • H02G3/0481—Tubings, i.e. having a closed section with a circular cross-section

Definitions

  • This application relates to the technical field of wiring accessories, in particular to a protective tube.
  • the cable In order to make the scattered and messy cables relatively fixed, and to protect the cables when impacted by external forces, The cable needs to be covered and encapsulated through a protective tube.
  • a protective tube Especially for new energy high-voltage wiring harnesses, it is especially necessary to use protective tubes to resist the impact of external forces.
  • the protective tube and the cable When the equipment is running or vibrating, the protective tube and the cable will move relative to each other to generate friction, which will generate noise, and the mutual friction will also affect the service life of the cable.
  • the hardness of the protective tube is relatively large, and the protective tube with a relatively large hardness will further aggravate the friction with the cable.
  • the present application provides a protective tube, which aims to improve the friction between the protective tube and the cable.
  • this application provides a protective tube, including:
  • a pipe wall is formed with a pipe for the cable to pass through, and the pipe wall includes a first warp yarn and a first weft yarn knitted by warp and weft;
  • the fluffy warp yarns are located on the inner surface of the tube wall, and the fluffy warp yarns have a higher fluff than the first warp yarns.
  • a plurality of intersections are formed, and each of the fluffy warp yarns spans a plurality of the first weft yarns between two adjacent intersections.
  • the cable passes through the pipe formed by the pipe wall and contacts the fluffy warp yarn on the inner surface of the pipe wall. Since the bulkiness of the fluffy warp yarn is greater than that of the first warp yarn, when the protective tube is impacted by an external force, the tube wall with greater hardness can protect the cable. At the same time, the fluffy warp yarn acts as a buffer to reduce the protection. The friction between the tube and the cable. Moreover, since the fluffy warp yarn spans multiple first weft yarns between two adjacent intersections with the first weft yarn, the fluffiness of the fluffy warp yarn can be further enhanced, thereby further improving the cushioning effect of the fluffy warp yarn.
  • FIG. 1 is a schematic diagram of the structure of a protective tube according to an embodiment of the application
  • Fig. 2 is a schematic diagram of a cross section of the protective tube in Fig. 1;
  • Figure 3 is a schematic diagram of the structure in Figure 2 when it is flattened
  • FIG. 4 is a schematic diagram of the structure of the inner surface of the tube wall in FIG. 3;
  • FIG. 5 is a schematic diagram of the structure of the outer surface of the tube wall in FIG. 3;
  • Fig. 6 is a partial enlarged view of A in Fig. 5;
  • FIG. 7 is a schematic view of the structure of the inner surface of the tube wall of the protective tube according to another embodiment
  • FIGS. 8A-8D are structural schematic diagrams of the outer wall of the protective tube in different embodiments.
  • Fig. 9 is a partial enlarged view at B in Fig. 8D.
  • an embodiment of the present application provides a protective tube 100 for covering and encapsulating cables.
  • the protection tube 100 includes a tube wall 10 and an outer wall 30 that are stacked, and the tube wall 10 and the outer wall 30 are rolled together to form a pipe 110 for cables to pass through.
  • the tube wall 10 is divided into a first part and a second part that are sequentially connected along the weft direction, and the direction from the outer wall 30 to the tube wall 10 is defined as an inward direction.
  • the first part is enclosed to form a pipe 110, that is, the inner surface of the first part is the inner surface of the pipe 110.
  • the second part covers at least part of the structure of the first part, and the inner surface of the second part overlaps with the outer surface of the outer wall 30 corresponding to the outer surface of the second part.
  • this application takes a self-winding protective tube as an example, but it is not limited to a self-winding protective tube.
  • the tube wall 10 includes a first warp yarn 11 and a first weft yarn 12 knitted by warp and weft.
  • the protective tube 100 further includes a bulky warp yarn 50, the bulky warp yarn 50 is located on the inner surface of the tube wall 10, and the bulkiness of the bulky warp yarn 50 is greater than the bulkiness of the first warp yarn 11.
  • the fluffy warp yarn 50 can be made of materials such as hollow yarn, stretched yarn, wool yarn, cotton yarn, embroidery yarn, hemp yarn, pile yarn, decorative yarn, bulked yarn, fancy yarn, chenille yarn, animal wool yarn and the like.
  • the fluffy warp yarn 50 is woven by warp and weft with the first weft yarn 12 and forms a plurality of intersection points with the first weft yarn 12, and each fluffy warp yarn 50 spans a plurality of first weft yarns 12 between two adjacent intersection points.
  • the intersection with the weft yarn refers to the position of the warp yarn on the same side of the weft yarn.
  • the figure shows the intersection 51 and 52 of the fluffy warp yarn 50 and the first weft 12 with a dashed box.
  • the intersection 51 and the intersection 52 indicate that the fluffy warp yarn 50 is located at the first weft The position inside 12, and the intersection point 51 and intersection point 52 are two adjacent intersection points.
  • each fluffy warp yarn 50 spans three first weft yarns 12 between two adjacent intersections.
  • the bulkiness of the fluffy warp yarn 50 can be maintained, and the fluffy warp yarn 50 can have a certain tension to ensure the cushioning effect of the fluffy warp yarn 50.
  • each fluffy warp yarn 50 may also have two or more than four first weft yarns 12 spanning between two adjacent intersections, and in order to make the fluffy warp yarn 50 have a certain tension, two adjacent two The number of first weft yarns 12 between the intersections does not exceed ten.
  • the cable passes through the pipe 110 formed by the tube wall 10 and contacts the fluffy warp yarn 50 on the inner surface of the tube wall 10. Since the bulkiness of the fluffy warp yarn 50 is greater than that of the first warp yarn 11, when the protective tube 100 is impacted by an external force, the tube wall 10 with greater hardness can protect the cable, and at the same time, the fluffy warp yarn 50 serves as a buffer. , To reduce the friction between the protective tube 100 and the cable.
  • the bulky warp yarn 50 spans a plurality of first weft yarns 12 between two adjacent points of intersection with the first weft yarn 12, the bulkiness of the bulky warp yarn 50 can be further enhanced, thereby further improving the cushioning effect of the bulky warp yarn 50.
  • the protective tube 100 in this embodiment is a self-winding protective tube, not all the inner surface of the tube wall 10 is in contact with the cable. Therefore, the fluffy warp yarn 50 of the present embodiment is only woven with the first weft yarn 12 of the first part of the warp and weft. In this way, materials can be saved, and the fluffy warp yarn 50 can be prevented from being exposed to cause pilling and affecting the appearance.
  • the fluffy warp yarn 50 and the first warp yarn 11 are located on the same side of the first weft yarn 12, so that the fluffy warp yarn 50 and the first weft yarn 12 are located on the same side.
  • Weft 12 weaves.
  • first warp yarn 11 may be spaced between two adjacent fluffy warp yarns 50. As shown in FIG. 7, a first warp yarn 11 is spaced between two adjacent fluffy warp yarns 50, so that the fluffy warp yarn 50 has enough space for weaving. In other embodiments, a plurality of first warp yarns 11 may be spaced between two adjacent fluffy warp yarns 50 so as to be reasonably arranged according to the diameter of the first warp yarn 11 and the fluffy warp yarn 50.
  • the first weft yarn 12 includes a monofilament 121 and a multifilament 122, and the diameter of the monofilament 121 is 0.1 mm to 1 mm.
  • the monofilament 121 is relatively thick and hard, which facilitates self-winding to form the pipe 110, and makes the pipe wall 10 have a certain strength to resist the impact of external force.
  • the figures show the outer wall 30 woven by different weaving methods.
  • the outer wall 30 includes a second warp yarn 31 and a second weft yarn 32 knitted by warp and weft, and the second weft yarn 32 includes a monofilament 321 and a multifilament 322.
  • the diameter of the monofilament 321 is 0.1mm to 1mm can enhance the strength of the outer wall 30, and facilitate the protective tube 100 to form a pipe 110 by self-rolling.
  • the color of the outer surface of the tube wall 10 is different from the color of the outer wall 30.
  • the tube wall 10 and the outer wall 30 can be made of braided materials of different colors, or the outer surface of the tube wall 10 can be coated with paint , It is not limited here.
  • the protection tube 100 has a two-layer structure, which can enhance the hardness of the protection tube 100 without making the structure of the protection tube 100 too complicated and making the protection tube 100 have a more appropriate weight.
  • the protection tube 100 may also have a single-layer structure, that is, only the tube wall 10 may be used, or the protection tube 100 may also have a three-layer structure or more.

Abstract

一种保护管（100），包括管壁（10）及蓬松经纱（50），管壁形成有用于供线缆穿设的管道，且管壁包括经纬编织的第一经纱（11）及第一纬纱（12）；蓬松经纱位于管壁的内表面，且蓬松经纱的蓬松度大于第一经纱的蓬松度，蓬松经纱与第一纬纱经纬编织，并与第一纬纱形成多个交点，且每一蓬松经纱在相邻的两个交点之间跨有多条第一纬纱。当保护管受外力冲击时，硬度较大的管壁能够对线缆起到保护作用，同时，蓬松经纱起到缓冲作用，以减小保护管与线缆之间的摩擦。而且，由于蓬松经纱在相邻两个与第一纬纱形成的交点之间跨有多条第一纬纱，能够进一步增强蓬松经纱的蓬松度，从而进一步提升蓬松经纱的缓冲效果。

Description

保护管 技术领域
本申请涉及布线配件技术领域，尤其涉及一种保护管。
 背景技术
现有用电设备与电源之间，以及用电设备的电气元件之间，都需要通过线缆进行连接，为了使分散、凌乱的线缆能够相对固定，并在受外力冲击时保护线缆，需要将线缆通过保护管进行包覆与封装。特别是对于新能源高压线束，尤其需要通过保护管来对抗外力冲击。
 技术问题
在设备运行或震动时，保护管与线缆之间会相对移动而产生摩擦，从而产生噪音，且相互摩擦还会影响线缆的使用寿命。然而，为了加强保护管的耐冲击性能，保护管的硬度较大，硬度较大的保护管会进一步加剧与线缆之间的摩擦。
 技术解决方案
本申请提供一种保护管，旨在改善保护管与线缆之间相互摩擦的问题。
为解决上述问题，本申请提供一种保护管，包括：
管壁，形成有用于供线缆穿设的管道，且所述管壁包括经纬编织的第一经纱及第一纬纱；及
蓬松经纱，位于所述管壁的内表面，且所述蓬松经纱的蓬松度大于所述第一经纱的蓬松度，所述蓬松经纱与所述第一纬纱经纬编织，并与所述第一纬纱形成多个交点，且每一所述蓬松经纱在相邻的两个所述交点之间跨有多条所述第一纬纱。
 有益效果
实施本申请实施例，将具有如下有益效果：
使用本申请的保护管时，线缆穿设于管壁形成的管道内，并与位于管壁内表面的蓬松经纱接触。由于蓬松经纱的蓬松度大于第一经纱的蓬松度，当保护管受外力冲击时，硬度较大的管壁能够对线缆起到保护作用，同时，蓬松经纱起到缓冲作用，以减小保护管与线缆之间的摩擦。而且，由于蓬松经纱在相邻两个与第一纬纱形成的交点之间跨有多条第一纬纱，能够进一步增强蓬松经纱的蓬松度，从而进一步提升蓬松经纱的缓冲效果。
 附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
其中：
图1为本申请一实施例的保护管的结构示意图；
图2为图1中保护管的横截面的示意图；
图3为图2中结构展平时的示意图；
图4为图3中管壁的内表面的结构示意图；
图5为图3中管壁的外表面的结构示意图；
图6为图5中A处的局部放大图；
图7为另一实施例的保护管的管壁的内表面的结构示意图；
图8A-8D为不同实施例中保护管的外壁的结构示意图；
图9为图8D中B处的局部放大图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明，本申请实施例中所有方向性指示（诸如上、下、左、右、前、后……）仅用于解释在某一特定姿态（如附图所示）下各部件之间的相对位置关系、运动情况等，如果所述特定姿态发生改变时，则所述方向性指示也相应地随之改变。
另外，在本申请中涉及“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个所述特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本申请要求的保护范围之内。
如图1所示，本申请一实施例提供一种保护管100，用于包覆与封装线缆。一并结合图2及图3，保护管100包括层叠设置的管壁10及外壁30，且管壁10与外壁30一同自卷形成用于供线缆穿设的管道110。为便于描述，将管壁10划分为沿纬线方向顺次连接的第一部分及第二部分，并定义外壁30至管壁10的方向为向内方向。主要参考图2，第一部分围合形成管道110，也即第一部分的内表面为管道110的内表面。第二部分包覆于第一部分的至少部分结构，第二部分的内表面与外壁30对应于第二部分的外表面重叠。应当注意的是，本申请以自卷式保护管为例进行说明，但并不限于自卷式保护管。
主要参考图4至图6，管壁10包括经纬编织的第一经纱11及第一纬纱12。保护管100还包括蓬松经纱50，蓬松经纱50位于管壁10的内表面，且蓬松经纱50的蓬松度大于第一经纱11的蓬松度。蓬松经纱50可以采用空变丝，加弹纱，毛纱，棉纱，绣花纱，麻纱，起绒纱，装饰纱，膨体纱，花式纱，绳绒纱，动物毛纱等材料。蓬松经纱50与第一纬纱12经纬编织，并与第一纬纱12形成多个交点，且每一蓬松经纱50在相邻的两个交点之间跨有多条第一纬纱12。
可以理解地，对于经纱而言，与纬纱的交点是指经纱位于纬纱同一侧的位置。例如，在本实施例中，如图4所示，图中用虚线方框示出蓬松经纱50与第一纬纱12的交点51及交点52，交点51及交点52为蓬松经纱50位于第一纬纱12内侧的位置，且交点51与交点52为相邻的两个交点。当然，也可以定位经纱与纬纱的交点指经纱位于纬纱外侧的位置。
在本实施例中，每一蓬松经纱50在相邻的两个交点之间跨有三条第一纬纱12。既可以保持蓬松经纱50的蓬松度，又可以使蓬松经纱50有一定的张力，以保证蓬松经纱50的缓冲效果。在其他实施例中，每一蓬松经纱50在相邻的两个交点之间也可以跨有两条或者四条以上的第一纬纱12，且为使得蓬松经纱50有一定的张力，相邻两个交点之间的第一纬纱12的数量不超过十条。
使用本申请的保护管100时，线缆穿设于管壁10形成的管道110内，并与位于管壁10内表面的蓬松经纱50接触。由于蓬松经纱50的蓬松度大于第一经纱11的蓬松度，当保护管100受外力冲击时，硬度较大的管壁10能够对线缆起到保护作用，同时，蓬松经纱50起到缓冲作用，以减小保护管100与线缆之间的摩擦。而且，由于蓬松经纱50在相邻两个与第一纬纱12形成的交点之间跨有多条第一纬纱12，能够进一步增强蓬松经纱50的蓬松度，从而进一步提升蓬松经纱50的缓冲效果。
应当注意的是，由于本实施例中保护管100为自卷式保护管，管壁10的内表面并非全部与线缆接触。因此，本实施例的蓬松经纱50仅与第一部分的第一纬纱12经纬编织。如此，既可以节省材料，又可以避免蓬松经纱50外露导致起球而影响美观。
值得一提的是，在本实施例中，在蓬松经纱50与第一纬纱12的交点处，蓬松经纱50与第一经纱11位于第一纬纱12的同一侧，便于将蓬松经纱50与第一纬纱12编织。对于本实施例而言，主要参考图4，由于每一第一经纱11与第一纬纱12的交点之间跨有三条第一纬纱12，那么，为使得在蓬松经纱50与第一纬纱12的交点处，蓬松经纱50始终与第一经纱11位于第一纬纱12的同一侧，相邻两个交点之间的第一纬纱12的数量为奇数。
而且，相邻两条蓬松经纱50之间还可以间隔有第一经纱11。如图7所示，相邻两条蓬松经纱50之间间隔有一条第一经纱11，使蓬松经纱50有足够的编织空间。在其他实施例中，相邻两条蓬松经纱50之间还可以间隔有多条第一经纱11，以根据第一经纱11与蓬松经纱50的线径大小合理排布。
此外，主要参考图5及图6，第一纬纱12包括单丝121及复丝122，且单丝121的线径为0.1mm至1mm。单丝121相对较粗较硬，便于自卷形成管道110，并使得管壁10有一定的强度，以抵抗外力冲击。
主要参考图8A-8D，图中示出采用不同编织方法编织的外壁30。以图8D为例进行说明，并结合图9，外壁30包括经纬编织的第二经纱31及第二纬纱32，且第二纬纱32包括单丝321及复丝322，单丝321的线径为0.1mm至1mm，可增强外壁30的强度，并便于保护管100自卷形成管道110。
此外，管壁10的外表面的颜色与外壁30的颜色不同。这样，当外壁30被磨损后，管壁10露出，不同颜色能够起到警示作用，便于用户快速识别磨损程度，以进行维修。可以理解地，为使管壁10的外表面的颜色与外壁30的外表面的颜色不同，管壁10与外壁30可以采用不同颜色的编织材料，也可以在管壁10的外表面涂上颜料，在此不作限定。
应当注意的是，在本实施例中，保护管100为两层结构，可以增强保护管100的硬度，又不至于使得保护管100的结构太复杂，并使保护管100具有较为合适的重量。在其他实施例中，保护管100也可以为单层结构，即仅有管壁10，或者，保护管100也可以采用三层以上的结构。
以上所揭露的仅为本申请较佳实施例而已，当然不能以此来限定本申请之权利范围，因此依本申请权利要求所作的等同变化，仍属本申请所涵盖的范围。

Claims (10)

  1. 一种保护管，其特征在于，包括：
    管壁，形成有用于供线缆穿设的管道，且所述管壁包括经纬编织的第一经纱及第一纬纱；及
    蓬松经纱，位于所述管壁的内表面，且所述蓬松经纱的蓬松度大于所述第一经纱的蓬松度，所述蓬松经纱与所述第一纬纱经纬编织，并与所述第一纬纱形成多个交点，且每一所述蓬松经纱在相邻的两个所述交点之间跨有多条所述第一纬纱。
  2. 如权利要求1所述的保护管，其特征在于，每一所述蓬松经纱在相邻的两个所述交点之间跨有二至十条所述第一纬纱。
  3. 如权利要求1或2所述的保护管，其特征在于，在所述蓬松经纱与所述第一纬纱的交点处，所述蓬松经纱与所述第一经纱位于所述第一纬纱的同一侧。
  4. 如权利要求1所述的保护管，其特征在于，相邻两条所述蓬松经纱之间间隔有所述第一经纱。
  5. 如权利要求1所述的保护管，其特征在于，所述保护管还包括外壁，所述外壁层叠设置于所述管壁的外表面，并包括经纬编织的第二经纱及第二纬纱。
  6. 如权利要求5所述的保护管，其特征在于，所述管壁的外表面的颜色与所述外壁的颜色不同。
  7. 如权利要求5所述的保护管，其特征在于，所述第二纬纱包括单丝及复丝，且所述单丝的线径为0.1mm至1mm。
  8. 如权利要求1所述的保护管，其特征在于，所述管壁包括沿纬线方向顺次连接的第一部分及第二部分，所述第一部分围合形成所述管道，所述第二部分包覆于所述第一部分的至少部分结构。
  9. 如权利要求8所述的保护管，其特征在于，所述蓬松经纱仅与所述第一部分的所述第一纬纱经纬编织。
  10. 如权利要求1所述的保护管，其特征在于，所述第一纬纱包括单丝及复丝，且所述单丝的线径为0.1mm至1mm。
PCT/CN2020/079136 2020-03-13 2020-03-13 保护管 WO2021179278A1 (zh)

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