A high-speed optical fiber secondary coating and pulling device

Abstract

The present invention relates to a high-speed optical fiber secondary sheathing traction device, which includes a box body and a water wheel. The water wheel freely performs circumferential rotation around its central axis and is built into the box body. A plurality of grooves for winding the towed sleeve are provided around the circumferential side wall of the water wheel. In addition, the high-speed optical fiber secondary sheathing traction device also includes a wire pulling wheel. The wire pulling wheel is also built into the box body and is located on one side of the water wheel. The wire pulling wheel performs reciprocating displacement along the axial direction of the water wheel to continuously pull the sleeve against. In this way, on the one hand, it ensures that the sleeve has a good arrangement state, and then ensures that it has a good stress state, which provides a strong guarantee for the good sheathing quality of the final optical fiber; on the other hand, it also effectively ensures that the water wheel itself has a large total wire arrangement capacity, which provides the possibility for the miniaturization design of the water wheel.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber manufacturing, in particular to a high-speed optical fiber secondary coating and pulling device. Background Art

[0002] The secondary sheathing process of optical fiber is to select suitable polymer materials and use extrusion process to sheath a suitable loose sheath of the same length as the optical fiber. At the same time, a mixture with long-term stable chemical and physical properties, suitable viscosity, excellent waterproof performance, good long-term protection performance for optical fiber, and completely compatible with the sheath material is filled between the sheath and the optical fiber, referred to as fiber paste. The optical fiber has free movement space in the tube, so the tensile and lateral pressure resistance of the optical fiber after secondary sheathing is better. The formation mechanism of excess length: the optical fiber passes through the extruder head through the pay-off guide wheel, is placed in the sheath, and the sheath is filled with fiber paste, which is pulled by the disc traction wheel, and the optical fiber and the sheath are locked on the water wheel. Under the action of the pay-off tension, the optical fiber will move closer to the inside of the sheath on the water wheel, so the winding diameter of the optical fiber must be smaller than the winding diameter of the sheath, forming a certain negative excess length. After the sheath enters the cold water tank, due to the temperature difference between cold and hot water, the sheath will produce cold contraction, which not only compensates for its negative excess length on the disc traction wheel, but also obtains the required positive excess length. However, in the actual implementation of the sheathing process, the sheathing is very likely to be stacked or inconsistently dense on the circumferential side wall of the water wheel. This, on the one hand, will affect the tension value of the sheathing. The maximum speed of the optical fiber secondary sheathing production line can reach 500m / min. Problems such as optical fiber breakage and unstable excess length have repeatedly occurred, restricting the overall speed of the optical fiber secondary sheathing production line and the improvement of the optical fiber sheathing quality; on the other hand, it will also affect the arrangement of the sheathing on the water wheel, reducing its overall line arrangement along it. Therefore, it is urgent for technical personnel to solve the above problems. Summary of the invention

[0003] Therefore, in view of the above-mentioned existing problems and defects, the designers of the present invention collected relevant information, conducted multiple evaluations and considerations, and continued to experiment and modify after many years of R&D experience by technicians engaged in this industry, which ultimately led to the emergence of the high-speed optical fiber secondary sheathing and traction device.

[0004] In order to solve the above technical problems, the present invention relates to a high-speed optical fiber secondary sheathing traction device, which includes a box and a water wheel. The water wheel freely rotates circumferentially around its central axis and is built into the box. A plurality of grooves for winding the towed casing are provided around the circumferential side wall of the water wheel. In addition, the high-speed optical fiber secondary sheathing traction device also includes a wire puller. The wire puller is also built into the box, and is located on one side of the water wheel. The wire puller performs reciprocating displacement motion along the axial direction of the water wheel to continuously pull the casing against.

[0005] As a further improvement of the technical solution of the present invention, the wire pulley includes a load-bearing shaft, a bearing assembly and a rotating member. The bearing assembly and the rotating member are sequentially sleeved on the load-bearing shaft from the inside to the outside. Under the action of the bearing assembly, the rotating member can freely perform circumferential rotation around its central axis.

[0006] As a further improvement of the technical solution of the present invention, the bearing assembly includes a first bearing and a second bearing which are arranged at a predetermined distance. The rotating member includes a first flange member, a rotating sleeve, a second flange member and a bolt assembly. The first flange member and the second flange member can be freely rotatably sleeved on the outer periphery of the load-bearing shaft, and are respectively fixed to the left and right ends of the rotating sleeve by means of the bolt assembly.

[0007] As a further improvement of the technical solution of the present invention, the bolt assembly is composed of a plurality of long bolts uniformly distributed in the circumferential direction, and the long bolts pass through the second flange, the rotating sleeve, and the first flange in sequence from right to left.

[0008] As a further improvement of the technical solution of the present invention, the rotating member also includes a first waterproof member and a second waterproof member. The first waterproof member is fixed to the left wall of the first flange member. The second waterproof member is arranged on the right side of the second flange member, which is sleeved on the load-bearing shaft and is screwed and fixed with the second flange member by means of a threaded pair. The first waterproof member and the second waterproof member work together to form a closed cavity inside the rotating member.

[0009] As a further improvement of the technical solution of the present invention, along its radial direction, the single-side clearance of the second waterproof component relative to the load-bearing axis is controlled to be 0.1-0.15 mm.

[0010] As a further improvement of the technical solution of the present invention, corresponding to the second flange, a series of water-isolating grooves parallel to each other are opened along the axial direction on the circumferential side wall of the load-bearing shaft.

[0011] As a further improvement of the technical solution of the present invention, the rotating sleeve is preferably made of stainless steel, and the first flange member and the second flange member are preferably aluminum alloy castings.

[0012] Compared with the high-speed optical fiber secondary sheathing traction device of the traditional design structure, in the technical solution disclosed in the present invention, an additional wire pulley is provided. The casing must pass through the wire pulley and always be in contact with the wire pulley. In the actual sheathing process, the wire pulley continuously performs reciprocating linear displacement motion along the axial direction of the water wheel, thereby evenly winding the casing on the water wheel. In this way, on the one hand, it ensures that the casing has a good arrangement state, and then ensures that it has a good stress state, which provides a strong guarantee for the good sheathing quality of the final optical fiber; on the other hand, it also effectively ensures that the water wheel itself has a large total wire arrangement capacity, which provides the possibility for the miniaturization design of the water wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a three-dimensional schematic diagram of the first embodiment of the high-speed optical fiber secondary coating and traction device of the present invention.

[0015] Figure 2 It is a three-dimensional schematic diagram of the wire pulley in the first embodiment of the high-speed optical fiber secondary sheathing and pulling device of the present invention.

[0016] Figure 3 yes Figure 2 Front view of .

[0017] Figure 4 yes Figure 3 AA section view.

[0018] Figure 5 yes Figure 2 Side view of.

[0019] Figure 6 yes Figure 5 BB cross-sectional view.

[0020] Figure 7 It is a three-dimensional schematic diagram of the second embodiment of the high-speed optical fiber secondary sheathing and traction device of the present invention.

[0021] 1-box; 2-water wheel; 3-line pulley; 31-load-bearing shaft; 311-water-isolating groove; 32-bearing assembly; 321-first bearing; 322-second bearing; 33-rotating member; 331-first flange; 332-rotating sleeve; 333-second flange; 334-bolt assembly; 3341-long bolt; 335-first waterproof member; 336-second waterproof member. DETAILED DESCRIPTION

[0022] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "left", "right", "front", "back", "up", "down", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] The present invention will be further described in detail below with reference to specific embodiments. Figure 1The figure shows a three-dimensional schematic diagram of the first embodiment of the high-speed optical fiber secondary coating and pulling device of the present invention. It can be seen that the device is mainly composed of a box body 1, a water wheel 2 and a wire drawing wheel 3. Figure 2 As shown in the figure, the water wheel 2 freely performs circumferential rotation around its central axis, and is built-in and installed in the box body 1. A plurality of grooves for winding the towed sleeve are provided around the circumferential side wall of the water wheel 2 (not shown in the figure). The wire puller 3 is also built-in in the box body 1, and is located on one side of the water wheel 2. The wire puller 3 corresponds to the water wheel 2, and its central axis is orthogonal to the central axis of the water wheel 2. The wire puller 3 performs reciprocating displacement along the axial direction of the water wheel 2 to continuously pull the sleeve against it. In the actual sheathing process, the wire puller 3 continuously performs reciprocating linear displacement along the axial direction of the water wheel 2, so that the sleeve is evenly wound on the water wheel 2. In this way, on the one hand, it ensures that the sleeve has a good arrangement state, and then ensures that it has a good stress state, which provides a strong guarantee for the good sheathing quality of the final optical fiber; on the other hand, it also effectively ensures that the water wheel 2 itself has a large total wire arrangement capacity, which provides the possibility for its miniaturized design.

[0024] It is known that the maximum speed of the optical fiber secondary coating production line can reach 500m / min, which requires the wire pulley 3 to have good rotation sensitivity to minimize the probability of optical fiber breakage and excess length instability. In view of this, a preferred structure of the wire pulley 3 is provided herein, as follows: the wire pulley 3 includes a load-bearing shaft 31, a bearing assembly 32 and a rotating member 33. The bearing assembly 32 and the rotating member 33 are sequentially sleeved on the load-bearing shaft 31 from the inside to the outside. Under the action of the bearing assembly 32, the rotating member 33 can freely perform circumferential rotation around its central axis (such as Figure 4 ).

[0025] As a further optimization of the technical solution of the high-speed optical fiber secondary sheathing and pulling device, the bearing assembly 32 is composed of a first bearing 321 and a second bearing 322 arranged at a predetermined distance (such as Figure 4 As shown in ), the load value borne by the first bearing 321 and the second bearing 322 in actual application is effectively reduced, and the service life of the first bearing 321 and the second bearing 322 is ensured to be as long as possible.

[0026] Furthermore, if Figure 3 , 4 As shown in , the rotating member 33 is preferably a split design structure, which includes a first flange member 331, a rotating sleeve 332, a second flange member 333 and a bolt assembly 334. The first flange member 331 and the second flange member 333 can be freely rotatably sleeved on the outer periphery of the bearing shaft 31, and are respectively fixed to the left and right ends of the rotating sleeve 332 by means of the bolt assembly 334. Figure 5 , 6As shown in , the bolt assembly 334 is composed of a plurality of long bolts 3341 uniformly distributed in the circumferential direction. The long bolts 3341 pass through the second flange 333, the rotating sleeve 332, and the first flange 331 in sequence from right to left. By adopting the above technical solution, the difficulty of installing the first bearing 321 and the second bearing 322 is effectively reduced. In the later maintenance or repair process, when the first bearing 321 and the second bearing 322 need to be replaced, the first flange 331 and the second flange 333 corresponding to them can be removed separately, which is convenient and quick.

[0027] On the basis of the above technical solution, in order to improve the wear resistance and corrosion resistance of the rotating member 33, the rotating sleeve 332 is preferably made of stainless steel. Furthermore, under the premise of ensuring that the rotating member has good structural strength, in order to achieve the design goal of reducing its own weight as much as possible and thus reducing the moment of inertia, the first flange 331 and the second flange 333 connected to the two end surfaces of the rotating sleeve 332 are preferably aluminum alloy castings.

[0028] It is known that in the actual operation process, the plastic sleeve needs to be cooled online in real time with the help of cooling water. In the aforementioned basic design, the wire pulley 3 is not provided with a waterproof sealing structure. As a result, cooling water can easily enter its interior, which will inevitably deteriorate the lubrication state of the first bearing 321 and the second bearing 322 therein, thereby increasing the movement resistance; in addition, when the amount of cooling water entering is large, it will also increase the rotational balance of the wire pulley 3 to a certain extent, thereby causing obvious shaking. In view of this, the rotating member 33 also needs to be provided with a first waterproof member 335 and a second waterproof member 336. The first waterproof member 335 is fixed to the left side wall of the first flange member 331 (of course, in order to reduce the molding and assembly costs, the first waterproof member 335 can be integrally formed with the first flange member 331 during the casting process). The second waterproof member 336 is arranged on the right side of the second flange member 333, which is sleeved on the load-bearing shaft 31, and is screwed and fixed with the second flange member 333 by means of a threaded pair. The first waterproof member 335 and the second waterproof member 336 work together to form a closed cavity (such as Figure 3 , 4 ).

[0029] Generally speaking, along its radial direction, the single-side clearance of the second waterproof component 336 relative to the load-bearing shaft 31 is preferably controlled within a range of 0.1 to 0.15 mm.

[0030] Figure 7The third embodiment of the second embodiment of the high-speed optical fiber secondary coating and pulling device of the present invention is shown. It can be seen that the difference between the second embodiment and the first embodiment is that a series of water-blocking grooves 311 arranged parallel to each other are provided on the circumferential side wall of the load-bearing shaft 31 in the axial direction, corresponding to the second flange 333. The existence of the water-blocking grooves 311 can increase the resistance of the cooling water entering the closed cavity to a certain extent, and increase its inflow path.

[0031] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-speed optical fiber secondary sheathing and pulling device, comprising a box and a water wheel; the water wheel freely rotates around its central axis and is built into the box; a plurality of grooves are provided around the circumferential side wall of the water wheel for the pulled sheath to be wound, characterized in that: It also includes a wire puller; the wire puller is also built into the box and is located on one side of the water wheel; the wire puller performs reciprocating displacement along the axial direction of the water wheel, and continuously pulls the sleeve against the wire puller; The wire pulley comprises a load-bearing shaft, a bearing assembly and a rotating member; the bearing assembly and the rotating member are sequentially sleeved on the load-bearing shaft from the inside to the outside; under the action of the bearing assembly, the rotating member can freely perform circumferential rotation around its central axis; The bearing assembly includes a first bearing and a second bearing which are arranged at a predetermined distance; the rotating member includes a first flange, a rotating sleeve, a second flange and a bolt assembly; the first flange and the second flange can be freely rotatably sleeved on the outer periphery of the load-bearing shaft, and are respectively fixed to the left and right ends of the rotating sleeve by means of the bolt assembly; The bolt assembly is composed of a plurality of long bolts uniformly distributed in the circumferential direction; the long bolts pass through the second flange, the rotating sleeve, and the first flange in sequence from right to left; The rotating part also includes a first waterproof part and a second waterproof part; the first waterproof part is fixed on the left side wall of the first flange part; the second waterproof part is arranged on the right side of the second flange part, which is sleeved on the load-bearing shaft and is screwed and fixed with the second flange part by means of a threaded pair; the first waterproof part and the second waterproof part work together to form a closed cavity inside the rotating part.

2. The high-speed optical fiber secondary coating and pulling device according to claim 1, characterized in that: Along its radial direction, the single-side clearance of the second waterproof component relative to the load-bearing shaft is controlled to be 0.1-0.15 mm.

3. The high-speed optical fiber secondary coating and pulling device according to claim 2, characterized in that: Just corresponding to the second flange, a series of water-isolating grooves parallel to each other are axially opened on the circumferential side wall of the load-bearing shaft.

4. The high-speed optical fiber secondary coating and pulling device according to any one of claims 1 to 3, characterized in that: The rotating sleeve is made of stainless steel; and the first flange and the second flange are both aluminum alloy castings.

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