WO2019047427A1 - 蝶形引入光缆的抗开裂测试装置及抗开裂测试方法 - Google Patents

蝶形引入光缆的抗开裂测试装置及抗开裂测试方法 Download PDF

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WO2019047427A1
WO2019047427A1 PCT/CN2017/118435 CN2017118435W WO2019047427A1 WO 2019047427 A1 WO2019047427 A1 WO 2019047427A1 CN 2017118435 W CN2017118435 W CN 2017118435W WO 2019047427 A1 WO2019047427 A1 WO 2019047427A1
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butterfly
cable
metal rod
cracking
screws
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PCT/CN2017/118435
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English (en)
French (fr)
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沈小平
张瑞
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通鼎互联信息股份有限公司
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Publication of WO2019047427A1 publication Critical patent/WO2019047427A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/18—Performing tests at high or low temperatures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/26—Investigating twisting or coiling properties

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  • the invention relates to the field of optical cable manufacturing process equipment, in particular to a crack-proof test device and a crack resistance test method for a butterfly-shaped cable.
  • the butterfly-shaped cable is divided into indoor type, indoor and outdoor self-supporting type and indoor and outdoor pipeline type according to the application scene.
  • These three types of butterfly-introducing optical cables generally use low-smoke halogen-free flame-retardant polyolefin materials as sheath materials.
  • low-smoke halogen-free flame-retardant polyolefin materials as sheath materials.
  • a large number of jacket cracking occurs.
  • the crack resistance of the cable jacket needs to be carried out. Research and testing.
  • the combination of heat and stress is the main cause of cracking of the cable sheath.
  • the first one is the experimental method specified in the standard, and the sample is mixed and compressed by the raw material particles.
  • the thickness of the sample is 1.25 mm;
  • the second type is Take a certain length of fiber optic cable, remove other residual components in the sheath, cut, knead and compress the sheath, the thickness of the sample is 1.25mm;
  • the third is to take a certain length of fiber optic cable, directly use the sheath as a test The test is carried out, and the thickness of the sample is the thickness of the cable sheath.
  • the viscosity of the melt will change somewhat, and the extrusion pressure is different, for example, the pressure of the melt in the head of different extrusion equipment is different, so that The entry and exit effects of the material are different, and shrinkage and die swell can occur.
  • many physical changes occur in the material, such as crystallization and orientation, which lead to changes in the density of the material, and changes in density often lead to large variations in hardness, mechanical properties, etc.
  • the crack resistance of the cable jacket has a critical impact, so the first two test methods do not accurately reflect the crack resistance of the cable jacket.
  • An object of the present invention is to solve at least one of the above problems, and to provide a crack resistance test apparatus and a crack resistance test method for a butterfly drop cable.
  • a crack-resistant test apparatus for a butterfly-shaped drop cable comprising a metal rod and a plurality of screws spaced apart from each other, the plurality of screws being detachably disposed on a surface of the metal rod, each screw being rotated There is a nut for pressing the end of the butterfly into the cable to be fixed to the surface of the metal rod.
  • a plurality of screws are arranged along the longitudinal direction of the metal rod, and the distance between the adjacent two screws is 25 to 35 mm.
  • the surface of the metal rod is provided with a plurality of spaced screw holes, and the plurality of screws and the plurality of screw holes are matched one by one.
  • the number of the screws is two, and the diameter of the metal rod is 40 mm and the length is 60 mm.
  • a crack resistance test method for a butterfly drop cable comprising the steps of:
  • the butterfly-introducing cable is wound and fixed by using a crack resistance test device.
  • the anti-cracking test device with the butterfly-introduced cable is placed in the high-temperature chamber, and the cycle test is carried out in the temperature range of -40-60 ° C. Each test is set with 5 to 7 temperature steps, each temperature step. The test time is 8 hours.
  • the winding and fixing step of the butterfly-introducing cable includes:
  • One end of the butterfly-shaped cable is pressed and fixed to the surface of the metal rod by a nut.
  • the butterfly-introducing cable is wound around the metal rod 10 times at an angle of 45 degrees from the horizontal direction, so that the flat surface of the butterfly-introducing cable is adhered to the surface of the metal rod.
  • the other end of the butterfly-introducing cable is pressed and fixed to the surface of the metal rod by another nut.
  • the anti-cracking test device of the butterfly-introducing optical cable of the invention has the advantages of simple structure and reasonable design.
  • the optical cable of various sizes can be wound and fixed, and the size of the metal rod is designed reasonably, which can satisfy most of the requirements.
  • the curvature radius requirement of the butterfly-introduced cable test can be closely matched with the anti-cracking test design parameters, and the winding and fixing modes of the butterfly-shaped cable can be simulated.
  • the test results can be highly referenced.
  • FIG. 1 shows a schematic view of a butterfly drop cable in accordance with an embodiment of the present invention.
  • a crack-resistant test device for a butterfly-shaped lead-in cable includes a metal rod 1 and a plurality of screws spaced apart from each other, a plurality of screws detachably disposed on a surface of the metal rod 1, each of which is screwed for introducing a butterfly shape The end of the cable is pressed against the nut 2 fixed to the surface of the metal rod.
  • a plurality of screws are arranged along the longitudinal direction of the metal rod 1, and the distance between the adjacent two screws is 25 to 35 mm.
  • the nuts on the two adjacent screws are used to fix the two ends of one cable.
  • the distance between two adjacent screws can accommodate about 10 turns of the cable, which can better simulate the winding or fixing of the cable during construction. Curvature.
  • a plurality of screws may be disposed on the metal rod 1, and each adjacent two screws cooperate to fix one optical cable.
  • the surface of the metal rod 1 is provided with a plurality of spaced screw holes, and the plurality of screws and the plurality of screw holes are matched one by one. Through the cooperation of the screw hole and the screw, the screw and the metal rod 1 are detachably connected, so that the use of the crack resistance test device is more flexible.
  • Different types of optical cables have different radii of curvature when they are fixed.
  • the diameter of the metal rod is 40mm and the length is 60mm.
  • the distance between the two screws is 30mm, and the butterfly is introduced into the cable at an angle of 45 degrees to the horizontal.
  • the detection scheme of the surface of the rod 1 is inclined by 10 turns, and is suitable for the detection test of the butterfly-introducing cable as the railway signal cable.
  • the butterfly-introducing cable When the anti-cracking test is performed on the butterfly-introducing cable by using the anti-cracking test device, the butterfly-introducing cable is firstly wound and fixed by using the device; and the anti-cracking test device to which the butterfly-introducing cable is fixed is placed in the high-low temperature box. Inside, the test is repeated twice in the temperature range of -40-60 ° C, and each test is set with 5 to 7 temperature steps, and the test time of each temperature step is 8 hours.
  • the step of winding and fixing the butterfly-introducing cable comprises: pressing one end of the butterfly-shaped cable into the surface of the metal rod 1 by a nut; and inserting the butterfly into the cable at an angle of 45 degrees from the horizontal direction
  • the rod is turned ten times so that the flat surface of the butterfly-shaped cable is bonded to the surface of the metal rod 1, and the other end of the butterfly-introducing cable is pressed and fixed to the surface of the metal rod 1 by another nut.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

蝶形引入光缆的抗开裂测试装置，包括金属棒（1）和彼此间隔设置的多个螺杆，多个螺杆可拆卸地设置于金属棒（1）的表面，每个螺杆均旋有用于将蝶形引入光缆的端头压紧固定在金属棒（1）表面的螺帽（2）。该测试装置结构简单，设计合理，通过调节螺帽（2）的位置，可对多种尺寸的光缆进行卷绕固定，并且金属棒（1）的尺寸设计合理，能够满足大多数蝶形引入光缆测试时对曲率半径的要求，通过与抗开裂测试设计的参数搭配，能够接近真实地模拟蝶形引入光缆施工时的缠绕和固定场景，测试结果可参考度高。

Description

蝶形引入光缆的抗开裂测试装置及抗开裂测试方法 技术领域
本发明涉及光缆制造工艺设备领域，特别涉及一种蝶形引入光缆的抗开裂测试装置及抗开裂测试方法。
背景技术
随着FTTx建设的高速发展，与之相配套的设施、设备和器件、线缆随之应运而生。作为FTTx接入网用的蝶形引入光缆就是其中之一。
蝶形引入光缆按应用场景分为室内型、室内外自承式型和室内外管道型。这三类蝶形引入光缆普遍采用低烟无卤阻燃聚烯烃材料作为护套材料。以低烟无卤聚烯烃材料为护套的光缆，在实际的敷设和使用中，特别是架空敷设，出现了大量护套开裂的情况，为了解决这个问题，需要对光缆护套耐开裂性能进行研究和测试。
排除氧和光的因素，热和应力的共同作用对光缆护套开裂的主要原因。目前，蝶形引入光缆的热变形实验主要有三种方法可选，第一种为按照标准规定的实验方法，通过原材料颗粒进行混炼和压片，试样的厚度为1.25mm；第二种为取一定长度的光缆，清除干净护套内其他残余构件，将护套剪碎、混炼和压片，试样厚度为1.25mm；第三种为取一定长度的光缆，直接用护套作为试样进行试验，试样厚度即为光缆护套的厚度。
由于塑料的挤出成型过程中，存在熔体的流动不同，熔体的粘度会发生一定的变化，加上挤出压力不同，比如不同挤出设备的机头中熔体受到的压力不同，使得材料的入口效应和出口效应不同，可以出现收缩现象和离模膨胀现象。而在挤出成型中，物料也会发生很多物理变化，例如结晶和取向等等，这些都会导致材料的密度变化，而密度的变化常常带来包括硬度、力学性能等较大的差异变化，这些光缆护套的耐开裂性能都有至关重要的影响，因此前两种测试方法并不能足够准确地反应光缆护套的耐开裂性能。
因此，目前多数生产制造商采用第三种方法进行耐开裂试验，即直接用护套作为试样进行试验，但试验中使用的光缆的安装用具却五花八门，缺少专门 的、成熟的相关技术。
发明内容
本发明的目的是为解决以上问题的至少一个，本发明提供蝶形引入光缆的抗开裂测试装置及抗开裂测试方法。
根据本发明的一个方面，提供一种蝶形引入光缆的抗开裂测试装置，包括金属棒和彼此间隔设置的多个螺杆，多个螺杆可拆卸地设置于金属棒的表面，每个螺杆均旋有用于将蝶形引入光缆的端头压紧固定在金属棒表面的螺帽。
其中，多个螺杆沿金属棒的长度方向排列，相邻两个螺杆间的距离为25～35mm。
其中，金属棒的表面设有间隔的多个螺孔，多个螺杆和多个螺孔一一对应适配。
其中，螺杆的个数为两个，金属棒的直径为40mm，长度为60mm。
根据本发明的另一方面，提供一种蝶形引入光缆的抗开裂测试方法，包括以下步骤：
利用抗开裂测试装置对蝶形引入光缆进行卷绕固定。
将固定有蝶形引入光缆的抗开裂测试装置放入高低温箱内，在-40—60℃的温度范围内进行两次循环测试，每次测试设置5～7个温度台阶，每个温度台阶的测试时间为8小时。
其中，蝶形引入光缆的卷绕固定步骤包括：
将蝶形引入光缆的一端用一螺帽压紧固定在金属棒的表面。
使蝶形引入光缆沿与水平方向成45度的角度在缠绕金属棒10圈，使得蝶形引入光缆的扁平面与金属棒的表面贴合。
将蝶形引入光缆的另一端用另一螺帽压紧固定在金属棒的表面。
其中，每次测试设置5个温度台阶。
本发明具有以下有益效果：
本发明的蝶形引入光缆的抗开裂测试装置，结构简单，设计合理，通过调节螺帽的位置，可对多种尺寸的光缆进行卷绕固定，并且金属棒的尺寸设计合理，能够满足大多数蝶形引入光缆测试时对曲率半径的要求，通过与抗开裂测 试设计的参数搭配，能够接近真实地模拟蝶形引入光缆施工时的缠绕和固定方式，测试结果可参考度高。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1示出了根据本发明实施方式的蝶形引入光缆的示意图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施方式。虽然附图中显示了本公开的示例性实施方式，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施方式所限制。相反，提供这些实施方式是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
一种蝶形引入光缆的抗开裂测试装置，包括金属棒1和彼此间隔设置的多个螺杆，多个螺杆可拆卸地设置于金属棒1的表面，每个螺杆均旋有用于将蝶形引入光缆的端头压紧固定在金属棒表面的螺帽2。
固定时，将蝶形引入光缆的端头按压在金属棒1的表面，旋动螺帽2，使螺帽2朝向金属棒1的方向移动，直至通过与金属棒1的表面配合将蝶形引入光缆的端头进行夹紧固定。
多个螺杆沿金属棒1的长度方向排列，相邻两个螺杆间的距离为25～35mm。相邻两个螺杆上的螺母用于固定一根光缆的两个端头，相邻两个螺杆间的距离能够容纳光缆缠绕10圈左右，可更好地模拟光缆在施工时缠绕或者固定时的曲率。当需要同时对多根光缆同时测试时，可在金属棒1上设置多个螺杆，每相邻的两个螺杆配合固定一根光缆。
金属棒1的表面设有间隔的多个螺孔，多个螺杆和多个螺孔一一对应适配。通过螺孔与螺杆的配合，使得螺杆与金属棒1之间可拆卸连接，使抗开裂测试装置的使用更具有灵活性。
不同种类的光缆在施工固定时的曲率半径不同，金属棒的直径为40mm，长度为60mm，其上两个螺杆的间距为30mm，且蝶形引入光缆以与水平方向成45度的角度在金属棒1的表面倾斜缠绕10圈的检测方案，适用于作为铁路信号光缆的蝶形引入光缆的检测试验。
使用该抗开裂测试装置对蝶形引入光缆进行抗开裂测试时，需要先利用该装置对蝶形引入光缆进行卷绕固定；再将固定有蝶形引入光缆的抗开裂测试装置放入高低温箱内，在-40—60℃的温度范围内进行循环两次的测试，每次测试设置5～7个温度台阶，每个温度台阶的测试时间为8小时。
蝶形引入光缆的卷绕固定步骤具体包括：将蝶形引入光缆的一端用一螺帽压紧固定在金属棒1的表面；使蝶形引入光缆沿与水平方向成45度的角度在缠绕金属棒1十圈，使得蝶形引入光缆的扁平面与金属棒1的表面贴合，将蝶形引入光缆的另一端用另一螺帽压紧固定在金属棒1的表面。
以上所述，仅为本发明较佳的具体实施方式，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揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (7)

  1. 蝶形引入光缆的抗开裂测试装置，其特征在于，包括金属棒(1)和彼此间隔设置的多个螺杆，所述多个螺杆可拆卸地设置于所述金属棒(1)的表面，每个所述螺杆均旋有用于将所述蝶形引入光缆的端头压紧固定在金属棒表面的螺帽(2)。
  2. 如权利要求1所述的抗开裂测试装置，其特征在于，
    所述多个螺杆沿所述金属棒(1)的长度方向排列，相邻两个所述螺杆间的距离为25～35mm。
  3. 如权利要求1所述的抗开裂测试装置，其特征在于，
    所述金属棒(1)的表面设有间隔的多个螺孔，所述多个螺杆和所述多个螺孔一一对应适配。
  4. 如权利要求1所述的抗开裂测试装置，其特征在于，
    所述螺杆的个数为两个，所述金属棒(1)的直径为40mm，长度为60mm。
  5. 蝶形引入光缆的抗开裂测试方法，其特征在于，包括以下步骤：
    利用抗开裂测试装置对蝶形引入光缆进行卷绕固定；
    将固定有蝶形引入光缆的抗开裂测试装置放入高低温箱内，在-40—60℃的温度范围内进行循环两次的测试，每次测试设置5～7个温度台阶，每个温度台阶的测试时间为8小时。
  6. 如权利要求5所述的将蝶形引入光缆的抗开裂测试方法，其特征在于，蝶形引入光缆的卷绕固定步骤包括：
    将蝶形引入光缆的一端用一螺帽压紧固定在金属棒(1)的表面；
    使蝶形引入光缆沿与水平方向成45度的角度在缠绕金属棒(1)10圈，使得蝶形引入光缆的扁平面与金属棒(1)的表面贴合；
    将蝶形引入光缆的另一端用另一螺帽压紧固定在金属棒(1)的表面。
  7. 如权利要求5所述的蝶形引入光缆的抗开裂测试方法，其特征在于，
    每次测试设置5个温度台阶。
PCT/CN2017/118435 2017-09-07 2017-12-26 蝶形引入光缆的抗开裂测试装置及抗开裂测试方法 WO2019047427A1 (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109540773A (zh) * 2018-10-19 2019-03-29 西安西古光通信有限公司 一种室外阻燃光缆开裂因素测定方法
CN112505089B (zh) * 2020-11-02 2024-05-10 通鼎互联信息股份有限公司 纱线热收缩率测试装置及测试方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001235409A (ja) * 2000-02-25 2001-08-31 Shimadzu Corp 細線試料試験治具
CN202372407U (zh) * 2011-12-22 2012-08-08 安徽特力电缆有限公司 电缆缠绕夹具
CN103454163A (zh) * 2012-05-30 2013-12-18 海洋王（东莞）照明科技有限公司 一种电缆线卷绕试验装置
CN104215519A (zh) * 2013-05-31 2014-12-17 深圳市海洋王照明工程有限公司 一种电缆线抗开裂性能的测试方法
CN205038097U (zh) * 2015-08-24 2016-02-17 杭州电缆股份有限公司 低烟无卤阻燃电缆料抗开裂试验装置
CN206002397U (zh) * 2016-08-26 2017-03-08 汕头高新区奥星光通信设备有限公司 一种材料热开裂试验装置
CN106769568A (zh) * 2017-01-20 2017-05-31 杭州富通通信技术股份有限公司 快速评价阻燃光电缆护层抗开裂性能的试验方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207396183U (zh) * 2017-09-07 2018-05-22 通鼎互联信息股份有限公司 蝶形引入光缆的抗开裂测试装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001235409A (ja) * 2000-02-25 2001-08-31 Shimadzu Corp 細線試料試験治具
CN202372407U (zh) * 2011-12-22 2012-08-08 安徽特力电缆有限公司 电缆缠绕夹具
CN103454163A (zh) * 2012-05-30 2013-12-18 海洋王（东莞）照明科技有限公司 一种电缆线卷绕试验装置
CN104215519A (zh) * 2013-05-31 2014-12-17 深圳市海洋王照明工程有限公司 一种电缆线抗开裂性能的测试方法
CN205038097U (zh) * 2015-08-24 2016-02-17 杭州电缆股份有限公司 低烟无卤阻燃电缆料抗开裂试验装置
CN206002397U (zh) * 2016-08-26 2017-03-08 汕头高新区奥星光通信设备有限公司 一种材料热开裂试验装置
CN106769568A (zh) * 2017-01-20 2017-05-31 杭州富通通信技术股份有限公司 快速评价阻燃光电缆护层抗开裂性能的试验方法

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