工程塑料拖链系列

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工程塑料拖链系列
用途：
    适合于使用在往复运动的场合，能够对内置的电缆、油管、气管、水管等起到牵引和保护作用。拖链每节都能打开，便于安装和维修。运动时噪音低、**、可高速运动。拖链已被广泛应用于数控机床、电子设备、石材机械、玻璃机械、门窗机械、注塑机、机械手、起重运输设备、自动化仓库等。 　　
拖链的结构： 
    拖链外形似坦克链，由众多单元链节组成，链节之间转动自如。相同系列的拖链内高、外高、节距相同，拖链内高、弯曲半径R可有不同的选择。单元链节由左右链板和上下盖板组成，拖链每节都能打开，装拆方便，不必穿线，打开盖板后即可把电缆、油管、气管等放入拖链内。另可提供分隔片，将链内空间按需要分隔开。
材料：增强尼龙，具有高的压力和抗拉负荷，良好的韧性、高弹性、**性、阻燃性。高低温时性能稳定，可以使用在室外。
抗耐性：耐油、盐并有一定的耐酸、耐碱能力。 
运行速度和加速度：较高速度可达5m/s,较高加速可达5m/s2（具体速度、加速度视运行情况而定。） 
运行寿命：在正常架空使用情况下，可达500万往复运动次数（具体寿命视运行情况而定）。
拖链的选用原则 
内高：选择内置电缆、油管、气管、水管等中较粗的一根作为参考高度，加上至少10%的高度空间作为拖链内高。如果重叠按重叠后实际高度作为参考高度。 
内宽：选择较粗的一些电缆、油管、气管、水管等，其外径之和作为拖链内宽的参考，并留有至少10%的宽度空间。 
弯曲半径：选择内置电缆、油管、气管、水管等中较大的弯曲半径作为参考值，并留有10%以上的空间，拖链内置电缆、油管、水管、气管的放置原则。 应该留有15%的剩余空间，让内置电缆、油管等可以自由活动，在半径方向上对拖链不产生拉力。直径差别大的导线应该分开铺设，重量平均分布，必要时可用分隔片分开。在高速或高频率运行时，要尽量使导线在水平上相互分开，不要使之相互叠置，在电缆、气管、油管等较多的时候建议使用分隔片。 
电缆拖链的安装： 
使用适当的平头螺丝刀，垂直插入盖板两端的开启孔，打开盖板，将电缆、油管等按照我们提供的放置原则放入拖链，然后盖上盖板，此外，电线的固定端和活动端均应去张力装置加以固定。在长距离滑动使用时，建议使用导向槽。导向槽的使用和安装请咨询公司**人员。 
Usage ：
Characteristics and Applications of Drag Chains 
The product can be used for such locations where repciprocating motions are required so that internally installed cables, oil pipes,gas tubes and water tubes can be draged and protected.Each joint of the chain can be opened up so as to facilitate repairsand maintenance. It gives low noises and is of anti-wearing whilerunning. It can also be operated under high speed.The drag chains have already extensively used in digital-controlledmachine tools, electronic equipment, machinery for stone industry,machinery for glass industry, machinery for doors and windows,moulding injectors, manipulators, lifting and transport equipmentand automatic warehouses, etc. Construction of the drag chains 
The appearance of the chain looks like the crawler of a tankconsisting of certain mumber of joints. The joints of crawler arefreely turned round.The same series of chain has same inner height and out height andsame pitch but the inner height and bend radius R can be made per different specifications.A unit chain joint is consisting of a left-right chain plate and a updown cover. Each chain joint can be opened up so as to facilitate assembly and dismantal without threading. Cables, oil pipes and gas pipes can be put into the drag chain after the cover plate is opened. Spacers are available for use, which are able to divide the space inside the chain into divisions according to requirements. Basic parameters of drag chains 
Material: reinforced nylon. It can stand with high pressure and has good tensile strength, toughness and elasticity, wearing and flamable resistance. Resistances: It is oil and salt resistant.Operating speed and acceleration: Max. operating speed is 5m/sec. and max. acceeleration is 5m/sec. ( specfic speed and acceleration depends on specific situation ).Service life: Under normal conditions, 5 million reciprocating motions can be reached ( which is also related to the operating conditions.) Principle for selecting drag chains 
Inner height: Take the most thick piece of the internally installed cable, oil pipe, gas pipe or water pipe as the reference height plus 10% of the space height at least as the inner height Hi.If overlapping, take the overlapped height as the actual height.Inner width: Take the sum of the outside diameter of the thicker cables, oil pipes, gas pipes or water pipes as the reference of the inner width and leave at least 10% of the space as a margin.Radius of a bend: Take the biggest radius of a bend of a cable, oil pipe, gas pipe or water pipe as a reference value and leave 10 %of the space as a margin. Installation principles for internally laid cable, oil pipe water pipe or gas pipe: 
15% of the space should be reserved as a margin so that the internally laid cables and oil pipes can move freely and there will not be any stress on the drag chains in the direction of radius.For those cables that are quite different in diameter, they shoud be laid separately and the weight should be balanced evenly. They can also be separated from one another by using spacers if necessary.When operating in high speed or high frequency, the horizontally laid cables should be in a parted way and should not be overlapped. If too many cables, gas pipes and oil pipes laid together, it is recommended that spacers be used. Installation for cable drag chains: 
Put a screw driver vertically into the opening hole at both ends of the cover and then open the cover. Put the drag chain for cables and oip pipes according to the instructions provided. Put the cover back. Note that the fixed end and the moving end of a cable should be fixed by using a tension device.When used in a long sliding service, it is