Adaptive cooling device and method for high-speed manufacturing of optical fiber loose tube

Abstract

The invention discloses an adaptive cooling device for manufacturing a fiber loose tube at a high speed, the adaptive cooling device comprises a water tank, a water volume control unit, a position adjusting unit and a controller; the water tank is used for cooling and shaping the fiber loose tube, and the internal cooling water in the water tank in real time immerses the fiber loose tube; the water volume control unit is used to control the water volume of the water tank to in real time ensure that the cooling water in the water tank can immerse the fiber loose tube; the position adjusting unit is used to adjust the distance between the water tank and an extruder head, thereby adjusting the water inlet surface of a stretching zone to precisely control the cooling and shaping size of the fiber loose tube; the controller is used to control the water volume control unit and the position adjusting unit to work. The present invention also provides an adaptive cooling method for manufacturing the fiber loose tube at the high speed. The adaptive cooling device can precisely control the cooling and shaping size of the fiber loose tube and ensures the dimensional stability of the fiber loose tube in the speed increasing stage.

Description

technical field [0001] The invention belongs to the technical field of optical cables, and in particular relates to an adaptive cooling device and method for high-speed manufacturing of optical fiber loose tubes. Background technique [0002] The secondary loose tube technology of optical fiber is to use polymer material to provide a protective layer for the optical fiber, referred to as loose tube, with filled fiber paste or water-blocking yarn, so that the optical fiber has a certain free movement space in the loose tube, that is, the excess length . The loose tube provides good tensile and lateral pressure protection for the optical fiber, that is, the optical fiber has a certain buffer length when the loose tube is subjected to axial tension, and the tube wall provides resistance when the loose tube is subjected to radial pressure. pressure protection. Therefore, the secondary loosening of optical fiber is the most important process in the production of communication o...

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Problems solved by technology

[0004] After the polymer material is extruded by the extruder, there is a stretching zone before it enters the water tank to cool. The water inlet surface of the stretching zone entering the cooling water tank plays a key role in the stability of the casing size. When other parameters remain unchanged, when the stretching zone enters the water tank too early, that is, the water inlet surface is too close to the machine head, the loose casing will Stretched to a suitable size and cooled and shaped, the size and excess length of the obtained loose tube will be too large; when the stretching zone enters the water tank too late, that is, the water inlet surface is far away from the machine head, the molten stretching zone is easy to sag, and the fiber friction is loose. The inner wall on the upper side of the casing, resulting in poor surface quality and size of the loose casing. During low-speed (80-100m / min) production, the slight change in the water inlet surface is slightly adjusted because the stretching zone does not change significantly with the speed. It has little effect on the quality of the loose tube, and at high speed (1000m / min), the stretching zone will exceed 150mm, and during the acceleration process (100m / min rises to 1000m / min), the stretching zone increases from 15mm to 150mm, At the same time, the cooling water is quickly taken away by the high-speed moving loose tube. In addition, it is necessary to accurately determine the position of the water inlet surface at different production speeds, and manual adjustment cannot ensure that it is at the same position every time.

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