rbcggl6113 / Indoor-cable-structure-and-welding-considerations

Physical structure:Indoor optical fiber cable is formed by the optical fiber(optical transmission carrier) after a certain process.Indoor Fiber Optic Cable optical fiber (fiberglass) as thinas a hair and plastic protective casing and plastic sheath, and metals such asgold, silver, copper and aluminum in the fiber optic cable, usually norecycling value.The indoor cable a certain number ofoptical fiber in accordance with certain cable core, outsourcing sheath, andsome coated outer sheath for optical signal transmission of a communicationline.SpliceNotes:A. Note the cablestripping knife depth. Cable outer sheath stripping key master jacket cutterinfeed depth fiber cut, it will easily occur. In actual operation, should edgerotation sheath cutter at the same time observe the incision, if we saw a whitepolyester tape, you should stop into the knife, remove the cutter. This step isa skilled process, required much practice to master the infeed depth.B.fixed core beam tube fiber optic cable stripping. Cable stripping the cablefixing the cable connector box, stripping the core beam tube, do all thepreparatory work before the fiber splicing.It should be noted at this time1)core beam pipe can not be twisted. Before fixed cable, attention must the corebeam tube location, reinforcing member passing through the fixing screws, thestrengthening of the following items must be filled beam pipe, can not be thecore beam tube, the beam tubes of the core must be in the reinforcing memberinto the optical fiber the accommodating tray ipsilateral, can not be twistedin the reinforcing member. Reinforcement If the pressure in the beam tube ofthe core, the core of the force of the beam tube deformation caused by the lossof too much fiber core beam tube will occur due to chronic stress fracture,left hidden to the project.2) to strengthen thelength of the piece to the right. Determined after the position of the corebeam tube can be fixed fiber optic cable. Cable fixed must not loose the fiberin the location of the connector box, to avoid due to the movement of the cableposition and lead to increased fiber loss or fiber cut problem. The fixing ofthe cable is divided into the remaining portion of the reinforcing member isfixed and cable fixation. The strengthening member fixed to pay attention toits length is too long, the fit of the connector box; too short, less than therole of the fixed fiber optic cable. Usually, when the shear reinforcementmember, should make a fixed cable splint considerable length with the distancebetween the screws of fixing the reinforcing member to the stay. The remainingportion of the cable fixed in the reinforcing member is fixed, with the screwtightening strap, which is firmly fixed in the fiber optic cable at the inletof the connector box.3.) The core beam pipe stripping to the right length. Fixedfiber optic cable, stripping the core beam tube. Long the length of thestripping, contact to the optical fiber heat-shrinkable tube placing groove,will damage the remainder of the disc fiber fiber; stripping length is tooshort, the core bundle tubes are fixed, the fixed clamp will be stuck on thefiber, and easy to damage the optical fiber . Accordingly, it will generally beopen stripping to two fixed bayonet appropriate, without causing damage to thefiber force can be well fixed to the beam tube in the length of the core. Fixedpawl can not card too tight, otherwise the the core beam tube fiber willincrease due to power loss, the time length of the fiber will fracture, leavingthe engineering hidden.C. fiber splice. Fiber connection directly related tothe quality and life of the project, the key lies in the preparation of thefiber end face. Fiber end face is smooth, no glitches or defects, weldingmachine well received confirmation, and can make the joints meet theengineering requirements, the fiber end face substandard welding machinerefused to work, or take out the splice loss, not in accordance withrequirements. In the process of production of fiber end face, stripping out thefiber coating, wire stripper and perpendicular to the fiber axis, wire stripperscratching Fibre; fiber is cut, the operation must be strictly in accordancewith the statutes, the use of the end face cutting knife to do the cuttinglength of the quasi-fast action, hard clever, to ensure that the optical fiberis its breaking, but not crushed; take the fiber, it is necessary to ensurethat the fiber does not touch any object to avoid end face bruised, to do so outof the end face is smooth, with a pass. The welding machine is the keyequipment for fiber splicing, is also a high level of precision and expensiveequipment. Must be strictly in accordance with the statutes in the course ofoperations, or may cause significant losses. Of particular note is theoperating procedures of the welding machine, heat shrink tubing length settingsshould be consistent and requirements.D. I protection of fiber optic splice fiber, it is necessaryto shrink tube protection of the fiber, but also stay disk I fiber.You should focus on:1 The optical fiberin the process of disc fiber disc fiber bend radius is not too small, generallynot less than 4 mm. Bend radius is too small, and likely to cause refractionloss is too large and the dispersion increases. A long time, the fiber cutphenomenon may also occur.2) when the discfiber, note the direction of the fiber distortions generally inverted8 shaped, be careful not to wring Fibre, the plate after fiber allbelow the into the asylum disk baffle to avoid package damage optical fiber.E. connector boxsealed cable connector box seal is very important in practical engineering.Because the surface of the optical fiber connector box water easily producemicro-cracks, the long time the fiber will fracture, and the connector box andis of directly buried way underground majority, so must do the sealing of theconnector box. The sealing of the connector box, the cable and connector box,the sealing of the two parts in the up and down between the cover of theconnector box. During fiber optic splice closure seal, the first seal at thecable sheath polished outer sheath with gauze on vertical fiber optic axialpolished, integrated more closely to the cable and sealing tape, sealing better. The seal between the upper and lower cover of the connector box, mainly Notesealing tape to prevent the seal groove in the connector box, tighten thescrews, leaving no gap evenly. www.youfibercable.com