Shrinkage compensation device for optical cable loose tube used in optical fiber secondary plastic sleeve

Abstract

The invention discloses an optical loose pipe shrinkage compensation device for an optical fiber secondary plastic cover. The device comprises a frame, a driving mechanism, a linear speed synchronous transmission mechanism, a pressing wheel mechanism and an up-down hoisting mechanism; the pressing wheel mechanism includes at least one lower pressing wheel and at least one bottom wheel; the lower pressing wheels are as many as the bottom wheels; the lower pressing wheels and the bottom wheels are driven through the linear speed synchronous transmission mechanism, so that the linear speeds V1 of contact points of the lower pressing wheels and the bottom wheels with a loose pipe are the same; and the linear speeds V1 of the two are quicker than the main traction speed V2 of the optical cable loose pipe. As the device is provided with the lower pressing wheels and the bottom wheels with the same linear speeds, and the linear speeds are higher than the traction speed of an optical cable, the device uses a traction mode for towing the loose pipe to neutralize and counteract the shrinkage rate of the loose pipe to a certain extent,the stability of remaining length of the optical fiber in the loose pipe is guaranteed, and the production quality and the production speed of the optical cable are improved.

Description

technical field [0001] The invention relates to a shrinkage compensation device for an optical cable loose tube used for secondary plastic sleeves of optical fibers. Background technique [0002] The secondary coating process of optical fiber is to select suitable polymer materials, adopt extrusion process, and under reasonable process conditions, put a loose tube with the same length as the optical fiber on the optical fiber. Due to the shrinkage of the loose tube, the formed The loose tube only allows the tube to shrink in a small range. The traditional process can only control a small degree of shrinkage at a lower speed and limited materials to meet the requirements, but at a higher production speed and greater flexibility Material, especially when producing grease-free full-dry environmentally friendly casing at high speed, due to the large shrinkage of the dry casing at this time, the traditional production method cannot control the shrinkage rate of the loose casing w...

AI Technical Summary

Problems solved by technology

[0002] The secondary coating process of optical fiber is to select suitable polymer materials, adopt extrusion process, and under reasonable process conditions, put a loose tube with the same length as the optical fiber on the optical fiber. Due to the shrinkage of the loose tube, the formed The loose tube only allows the tube to shrink in a small range. The traditional process can only control a small degree of shrinkage at a lower speed and limited materials to meet the requirements, but at a higher production speed and greater flexibility Material, especially when producing grease-free full-dry environmentally friendly casing at high speed, due to the large shrinkage of the dry casing at this time, the traditional production method cannot control the shrinkage rate of the loose casing within a reasonable range, thus affecting the loose casing. Pipe production quality and production efficiency

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