An optical fiber loose tube production device and its working principle

Abstract

An optical fiber loose tube production device, characterized in that: a pre-tension control mechanism is provided in the warm water cooling water tank, and the pre-tension control mechanism divides the warm water cooling water tank into two warm water sections, and the pre-tension control mechanism and the extruder The warm water cooling water tank between the heads is the first warm water section, and the warm water cooling water tank between the front tension control mechanism and the cold water cooling water tank is the second warm water section. Its working principle is as follows: the warm water cooling section is divided into the first warm water section and the second warm water section, and the first warm water section and the second warm water section are arranged in sequence along the optical fiber transmission direction; the loose tube material in the first warm water section The crystallization state is the same as that of the prior art, that is, crystallization under forced stretching, so that the loose tube has a certain compressive capacity, so as to facilitate the traction of the loose tube of optical fiber; in the second warm water section, the tension of the loose tube is controlled At zero or near zero, temper the loose tube and continue to crystallize in a relaxed and free state, which solves the problem of post-shrinkage of the loose tube.

Description

technical field [0001] The invention relates to an optical fiber loose tube production technology, more specifically, the invention relates to an optical fiber loose tube production device and its working principle. Background technique [0002] At present, in the optical fiber communication network, loose-tube layer-stranded and central tube-type optical cables are widely used, and in the optical cables of these structures, the optical fiber loose tube is the core component of its composition. [0003] Such as figure 1 As shown, the existing optical fiber loose tube generally includes optical fiber 01, loose tube 02 and optical fiber ointment 03, the above-mentioned optical fiber 01 is arranged in the loose tube 02, and the gap between the above-mentioned optical fiber 01 and loose tube 02 is filled with optical fiber Ointment 03; the above-mentioned loose tube 02 is generally made of polyester plastic, and the above-mentioned loose tube 02 can provide mechanical protectio...

AI Technical Summary

Problems solved by technology

[0010] (2) After the fiber loose tube is stored for a period of time, the excess length of the fiber will become larger

[0014] 3) The crystallization of the loose tube material is mainly completed in the warm water section between the extruder head and the wheel traction mechanism. At the same time, under the joint action of the first two factors, the loose tube material is forced to stretch Crystallized in the state, the molecular chain of the loose tube material is image 3 The orientation arrangement shown is an unstable state. When the tension becomes small or disappears, and the temperature is normal temperature, the molecular chain of the loose tube material will Figure 4 As shown in the steady state transition, at this time, the loose tube will be shortened, and it is easy to shrink after the loose tube, resulting in an increase in the excess length of the optical fiber

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