阅读说明：本技术 一种高速光纤二次套塑牵引装置 (High-speed optical fiber secondary plastic coating traction device ) 是由 李飞 方华 王亚伟 韦冬 孙强 杨艳杰 谢松年 胡乐 王烨华 孙文涛 万文波 于 2021-01-05 设计创作，主要内容包括：本发明涉及了一种高速光纤二次套塑牵引装置,其包括箱体以及水轮。水轮绕其中心轴线自由地进行周向旋转运动,且内置于箱体内。围绕水轮的周向侧壁开设有多条供被牵引的套管绕设的沟槽。另外,该高速光纤二次套塑牵引装置还包括有拨线轮。拨线轮亦内置于箱体内,且其位于水轮的一侧。拨线轮沿着水轮的轴向进行往复位移运动,以持续地对套管进行拨靠。这样一来,一方面,确保套管具有良好的排布状态,进而确保其具有良好的受力状态,为最终光纤的良好套塑品质提供有力保障；另一方面,还有效地确保了水轮自身具有较大的总排线量,为水轮的小型化设计提供了可能。(The invention relates to a high-speed optical fiber secondary plastic coating traction device which comprises a box body and a water wheel. The water wheel freely performs circumferential rotation motion around the central axis thereof and is arranged in the box body. And a plurality of grooves for winding the dragged sleeve are formed on the circumferential side wall around the water wheel. In addition, the high-speed optical fiber secondary plastic coating traction device also comprises a wire pulling wheel. The wire poking wheel is also arranged in the box body and is positioned on one side of the water wheel. The wire poking wheel carries out reciprocating displacement motion along the axial direction of the water wheel so as to continuously poke the sleeve. Therefore, on one hand, the sleeve is ensured to have a good arrangement state, so that the sleeve is ensured to have a good stress state, and powerful guarantee is provided for the good plastic sheathing quality of the final optical fiber; on the other hand, the water wheel is effectively ensured to have larger total discharge amount, and the possibility is provided for the miniaturization design of the water wheel.)

1. A high-speed optical fiber secondary plastic coating traction device comprises a box body and a water wheel; the water wheel freely performs circumferential rotary motion around the central axis of the water wheel and is arranged in the box body; the water wheel is characterized by also comprising a wire shifting wheel; the wire pulling wheel is also arranged in the box body and is positioned on one side of the water wheel; the wire poking wheel carries out reciprocating displacement motion along the axial direction of the water wheel and continuously pokes and leans against the sleeve.

2. The high-speed optical fiber secondary overmolding traction device according to claim 1, characterized in that the wire-pulling wheel comprises a bearing shaft, a bearing assembly and a rotating member; the bearing assembly and the rotating piece are sequentially sleeved on the bearing shaft from inside to outside; the rotary member is free to undergo circumferential rotational movement about its central axis under the action of the bearing assembly.

3. The high-speed optical fiber secondary overmolding pulling device according to claim 2, characterized in that the bearing assembly comprises a first bearing, a second bearing spaced apart by a predetermined distance; the rotating piece comprises a first flange piece, a rotating sleeve, a second flange piece and a bolt assembly; the first flange piece and the second flange piece can be freely and rotatably sleeved on the periphery of the bearing shaft and are respectively fixed at the left end and the right end of the rotating sleeve by means of the bolt assemblies.

4. The high-speed optical fiber secondary overmolding traction device according to claim 3, wherein the bolt assembly is composed of a plurality of circumferentially uniformly distributed long bolts; the long bolt sequentially penetrates through the second flange piece, the rotating sleeve and the first flange piece from right to left.

5. The high-speed optical fiber secondary overmolding traction device according to claim 4, wherein the rotating member further comprises a first waterproof member and a second waterproof member; the first waterproof piece is fixed on the left side wall of the first flange piece; the second waterproof piece is arranged on the right side of the second flange piece, sleeved on the bearing shaft and screwed and fixed with the second flange piece by means of a thread pair; the first and second flashing members coact to form a closed cavity within the rotating member.

6. The high-speed optical fiber secondary plastic coating traction device of claim 5, wherein the unilateral clearance of the second waterproof part relative to the bearing shaft along the radial direction is controlled to be 0.1-0.15 mm.

7. The high-speed optical fiber secondary overmolding traction device according to claim 6, characterized in that a series of water-separating grooves arranged in parallel with each other are axially arranged on the circumferential side wall of the bearing shaft just corresponding to the second flange member.

8. The high-speed optical fiber secondary overmolding traction device according to any one of claims 3-7, characterized in that the rotating sleeve is made of stainless steel; and the first flange part and the second flange part are both aluminum alloy casting parts.

Technical Field

The invention relates to the technical field of optical fiber manufacturing, in particular to a high-speed optical fiber secondary plastic coating traction device.

Background

The secondary plastic coating process of optical fiber is to select proper high molecular material and to coat the optical fiber with one loose tube with the length equal to that of the optical fiber. Meanwhile, a mixture which has stable chemical and physical properties for a long time, proper viscosity, excellent waterproof performance, good protective performance for the optical fiber for a long time and is completely compatible with the sleeve material, namely fiber paste for short, is filled between the sleeve and the optical fiber. The optical fiber has free moving space in the tube, so that the optical fiber after secondary plastic coating has better tensile and lateral pressure resistance. Mechanism of residual length formation: the optical fiber passes through the paying-off guide wheel, passes through the extrusion molding machine head, is placed into the sleeve, is filled with fiber paste, is pulled by the disc type traction wheel, and is locked on the water wheel together with the sleeve. The optical fiber is close to the inner side of the sleeve on the water wheel under the action of the pay-off tension, so that the winding diameter of the optical fiber is inevitably smaller than that of the sleeve, and a certain negative extra length is formed. After the sleeve enters the cold water tank, the sleeve can generate cold shrinkage due to the temperature difference between cold water and hot water, so that the negative extra length of the sleeve on the disc type traction wheel is compensated, and the required positive extra length is obtained. However, during the actual execution of the plastic sheathing process, the sleeves are easily stacked or inconsistently spaced on the circumferential side wall of the water wheel. In this way, on the one hand, the tension value to which the sleeve is subjected is influenced. The maximum speed of the optical fiber secondary coating production line can reach 500m/min, and the problems of optical fiber breakage and unstable residual length frequently occur, so that the overall speed of the optical fiber secondary coating production line and the improvement of the optical fiber coating quality are restricted; on the other hand, the arrangement state of the sleeve on the water wheel can be influenced, and the overall discharge quantity of the sleeve is reduced along the sleeve. Thus, a skilled person is urgently needed to solve the above problems.

Disclosure of Invention

Therefore, in view of the above-mentioned problems and drawbacks, the present inventor has collected relevant information, evaluated and considered in many ways, and continuously performed experiments and modifications by technicians with many years of research and development experience in this field, which finally resulted in the appearance of the high-speed optical fiber secondary overmolding pulling device.

In order to solve the technical problem, the invention relates to a high-speed optical fiber secondary plastic coating traction device which comprises a box body and a water wheel. The water wheel freely performs circumferential rotation motion around the central axis thereof and is arranged in the box body. And a plurality of grooves for winding the dragged sleeve are formed on the circumferential side wall around the water wheel. In addition, the high-speed optical fiber secondary plastic coating traction device also comprises a wire pulling wheel. The wire poking wheel is also arranged in the box body and is positioned on one side of the water wheel. The wire poking wheel carries out reciprocating displacement motion along the axial direction of the water wheel so as to continuously poke the sleeve.

As a further improvement of the technical scheme of the invention, the wire pulling wheel comprises a bearing shaft, a bearing assembly and a rotating piece. The bearing assembly and the rotating piece are sequentially sleeved on the bearing shaft from inside to outside. The rotary member is free to undergo circumferential rotational movement about its central axis under the action of the bearing assembly.

As a further improvement of the technical scheme of the invention, the bearing assembly comprises a first bearing and a second bearing which are arranged at a preset distance. The rotating member includes a first flange member, a rotating sleeve, a second flange member, and a bolt assembly. The first flange piece and the second flange piece can be freely and rotatably sleeved on the periphery of the bearing shaft and are respectively fixed at the left end and the right end of the rotating sleeve by means of bolt assemblies.

As a further improvement of the technical scheme of the invention, the bolt assembly is composed of a plurality of long bolts which are uniformly distributed in the circumferential direction. The long bolt sequentially passes through the second flange piece, the rotating sleeve and the first flange piece from right to left.

As a further improvement of the technical scheme of the invention, the rotating piece further comprises a first waterproof piece and a second waterproof piece. The first waterproof piece is fixed on the left side wall of the first flange piece. The second waterproof piece is arranged on the right side of the second flange piece, sleeved on the bearing shaft and screwed and fixed with the second flange piece by means of the thread pair. The first and second flashing members co-act to form a closed cavity within the rotatable member

As a further improvement of the technical scheme of the invention, along the radial direction, the unilateral clearance of the second waterproof part relative to the bearing shaft is controlled to be 0.1-0.15 mm.

As a further improvement of the technical scheme of the invention, just corresponding to the second flange piece, a series of water separating grooves which are parallel to each other are arranged on the circumferential side wall of the bearing shaft along the axial direction.

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.

Compared with a high-speed optical fiber secondary plastic coating traction device with a traditional design structure, the technical scheme disclosed by the invention is additionally provided with the wire pulling wheel. The sleeve pipe must pass through the wire shifting wheel and is always attached to the wire shifting wheel. In the actual plastic sleeving process, the wire shifting wheel continuously performs reciprocating linear displacement motion along the axial direction of the water wheel, so that the sleeve is uniformly wound on the water wheel, and therefore, on one hand, the sleeve is ensured to have a good arrangement state, and further, the sleeve is ensured to have a good stress state, and a powerful guarantee is provided for the good plastic sleeving quality of the final optical fiber; on the other hand, the water wheel is effectively ensured to have larger total discharge amount, and the possibility is provided for the miniaturization design of the water wheel.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of a first embodiment of a high-speed optical fiber secondary coating traction device in the invention.

Fig. 2 is a schematic perspective view of a wire pulling wheel in a first embodiment of the high-speed optical fiber secondary plastic coating traction device.

Fig. 3 is a front view of fig. 2.

Fig. 4 is a sectional view a-a of fig. 3.

Fig. 5 is a side view of fig. 2.

Fig. 6 is a sectional view B-B of fig. 5.

FIG. 7 is a perspective view of a second embodiment of the high-speed optical fiber secondary coating traction device of the present invention.

1-a box body; 2-a water wheel; 3-wire pulling wheel; 31-a bearing shaft; 311-water separating tank; 32-a bearing assembly; 321-a first bearing; 322-a second bearing; 33-a rotating member; 331-a first flange member; 332-a rotating sleeve; 333-a second flange member; 334-bolt assemblies; 3341-long bolt; 335-a first waterproof; 336-second flashing.

Detailed Description

In the description of the present invention, it is to be understood that the terms "left", "right", "front", "rear", "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The present invention will be described in further detail with reference to specific examples, and fig. 1 shows a schematic perspective view of a first embodiment of a high-speed optical fiber secondary coating traction apparatus according to the present invention, which is mainly composed of a box 1, a water wheel 2, and a wire-pulling wheel 3, wherein, as shown in fig. 2, the water wheel 2 freely performs a circumferential rotation motion around its central axis, and is embedded and installed in the box 1. A plurality of grooves (not shown in the figure) are formed around the circumferential side wall of the water wheel 2 for winding the pulled sleeve. The wire poking wheel 3 is also arranged in the box body 1 and is positioned at one side of the water wheel 2. The wire poking wheel 3 is just corresponding to the water wheel 2, and the central axis thereof is orthogonal to the central axis of the water wheel 2. The wire poking wheel 3 carries out reciprocating displacement motion along the axial direction of the water wheel 2 so as to continuously poke the sleeve. In the actual plastic sheathing process, the wire shifting wheel 3 continuously performs reciprocating linear displacement motion along the axial direction of the water wheel 2, so that the sleeve is uniformly wound on the water wheel 2, and therefore, on one hand, the sleeve is ensured to have a good arrangement state, and further, the sleeve is ensured to have a good stress state, and a powerful guarantee is provided for the final good plastic sheathing quality of the optical fiber; on the other hand, the water wheels 2 are effectively ensured to have larger total discharge amount, and the possibility of miniaturization design is provided.

As is known, the maximum speed of the optical fiber secondary coating production line can reach 500m/min, so that the wire-drawing wheel 3 itself is required to have good rotational sensitivity to reduce the probability of fiber breakage and instability of the remaining length as much as possible, and in view of this, a preferred structure of the wire-drawing wheel 3 is provided herein, specifically as follows: the capstan 3 includes a bearing shaft 31, a bearing assembly 32, and a rotary member 33. The bearing assembly 32 and the rotating member 33 are sequentially sleeved on the bearing shaft 31 from inside to outside. The rotary member 33 is free to undergo circumferential rotational movement about its central axis (as shown in figure 4) by the bearing assembly 32.

As a further optimization of the technical solution of the high-speed optical fiber secondary overmolding pulling device, the bearing assembly 32 is composed of a first bearing 321 and a second bearing 322 (as shown in fig. 4) which are arranged at a predetermined distance, so as to effectively reduce the load value borne by the first bearing 321 and the second bearing 322 in the practical application process, and ensure that the first bearing 321 and the second bearing 322 have a longer service life as much as possible.

Also, as shown in fig. 3 and 4, the rotary member 33 is preferably a split design structure including a first flange member 331, a rotary sleeve 332, a second flange member 333, and a bolt assembly 334. The first flange 331 and the second flange 333 are rotatably sleeved on the periphery of the bearing shaft 31, and are fixed to the left and right ends of the rotating sleeve 332 by the bolt assembly 334. As shown in fig. 5 and 6, the bolt assembly 334 is comprised of a plurality of circumferentially spaced long bolts 3341. The long screw 3341 is inserted through the second flange 333, the rotary sleeve 332, and the first flange 331 in this order from right to left. By adopting the technical scheme, the mounting difficulty of 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 the first bearing 321 and the second bearing 322 are independently removed, so that the operation is convenient and fast.

In addition to the above-described technical solutions, the rotary sleeve 332 is preferably made of stainless steel in view of improving wear resistance and corrosion resistance of the rotary member 33. Further, in order to achieve the design goal of reducing the self weight and thus the moment of inertia as much as possible while ensuring the structural strength of the rotary member, the first and second flange members 331 and 333 coupled to both end surfaces of the rotary sleeve 332 are preferably aluminum alloy castings.

It is known that in the actual operation process, the plastic sleeve needs to be cooled on line in real time by means of cooling water. In the basic design, the wire-pulling wheel 3 is not provided with a waterproof sealing structure, so that cooling water easily enters the interior of the wire-pulling wheel, and the lubricating state of the first bearing 321 and the second bearing 322 in the wire-pulling wheel is inevitably deteriorated, and the movement resistance is increased; in addition, when the entering amount of the cooling water is large, the rotating balance of the wire poking wheel 3 is increased to a certain degree, and the shaking phenomenon is obvious. In view of this, the first waterproof member 335 and the second waterproof member 336 are further added to the rotary member 33. The first waterproof member 335 is fixed to the left side wall of the first flange member 331 (of course, the first waterproof member 335 may be integrally formed with the first flange member 331 during casting for the sake of reducing the cost of molding and assembling). The second waterproof member 336 is disposed on the right side of the second flange member 333, is sleeved on the bearing shaft 31, and is screwed and fixed with the second flange member 333 by means of a screw pair. The first and second flashing 335, 336 co-act to form a closed cavity inside the swivel (as shown in figures 3, 4).

Generally, the unilateral clearance of the second waterproof member 336 with respect to the bearing shaft 31 is preferably controlled to be 0.1 to 0.15mm along the radial direction.

Fig. 7 is a schematic perspective view illustrating a second embodiment of the high-speed optical fiber secondary coating traction apparatus of the present invention, which is different from the first embodiment in that: just corresponding to the second flange part 333, a series of water-stop grooves 311 which are parallel to each other are axially arranged on the circumferential side wall of the bearing shaft 31. The presence of the water-blocking groove 311 may increase the resistance of the cooling water to the closed cavity to some extent and increase the inflow path thereof.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.