Molding device used for eccentric spiral optical cable tail fiber as well as molding method

Abstract

The invention discloses a molding device used for an eccentric spiral optical cable tail fiber as well as a molding method and relates to the field of optical cable tail fiber molding. The molding device comprises a second die used for bending the middle part of a spiral section of an optical cable tail fiber, the second die comprises a rotary die core and a rotary nut sheathed on the rotary die core, a first semicircle section is arranged at one end of the rotary die core, a first fixed structure used for fixing the optical cable tail fiber is arranged at one side, far away from the rotary die core, of the first semicircle section, a thread section is arranged at the middle part of the rotary die core, the rotary nut is connected with the thread section by virtue of a screw thread, a second pinch roller is fixed at one end, close to the first fixed structure, of the rotary nut by virtue of a rotating shaft, and a second interval which can be passed by the optical cable tail fiber is formed between the second pinch roller and the rotary die core. The molding device disclosed by the invention completes a bending operation on the spiral section of the optical cable tail fiber by virtue of the second die and has the characteristics of simplicity in demolding and no damage to the optical cable tail fiber when a demolding operation is carried out.

Description

technical field [0001] The invention relates to the field of forming optical cable pigtails, in particular to a forming device and forming method for eccentric spiral optical cable pigtails. Background technique [0002] The shape of the submarine optical cable repeater is a long cylinder, and there is a splice box connected to the submarine optical cable at each end. Its length exceeds that of a professional construction ship. It is inconvenient to board the ship and lay construction. Therefore, in order to overcome the above problems, a cardan shaft connector and a fiber optic cable pigtail are designed. The design of the cardan shaft coupling can ensure that the pigtail of the optical cable will not be damaged during transportation and laying construction. [0003] The optical cable pigtail is the key component to realize the sealing of the connection between the submarine optical cable repeater and the submarine cable. After the integrated production of the submarine op...

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Problems solved by technology

[0003] The optical cable pigtail is the key component to realize the sealing of the connection between the submarine optical cable repeater and the submarine cable. After the integrated production of the submarine optical cable repeater is completed, it needs to be transported long-distance, transferred to the ship and installed; during the laying construction process of the submarine optical cable repeater Among them, due to the design of the cardan shaft coupler and the optical fiber pigtail of the submarine optical cable repeater, the submarine optical cable repeater can play a certain buffer role in dealing with complex submarine landforms, transportation curves and avoiding damage to the photoelectric unit. At the same time, Due to the application environment of the submarine optical cable repeater, the optical cable tail fiber is in contact with seawater. The performance of the material used must meet the requirements of watertightness, airtightness, seawater corrosion, mechanical bending reduction performance and compression resistance under deep sea environmental conditions. Not only have certain requirements for the bending shape and the minimum bending angle, but also require zero damage to the surface of the cable pigtail. As a result, after the optical cable pigtail is formed, it is not easy to demould from the mold, and in the prior art, after the demoulding operation is completed, it is easy to cause damage to the surface of the demoulded optical cable pigtail, or cause the curved shape and the minimum bending Angle changes, resulting in substandard pigtails produced

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