A device for improving the roundness of a matrix-type optical fiber ribbon tube

Abstract

The present invention relates to the technical field of cable optical fiber processing, and specifically relates to a device for improving the roundness of a matrix-type optical fiber ribbon tube, which includes a large sleeve oil filling seat and a center line position limiter and adjuster. A head is fixed at the end of the large sleeve oil filling seat, and the center line position limiter and adjuster is located in a water tank arranged behind the large sleeve oil filling seat. The present invention can adjust the heights of the optical fiber ribbon, the oil filling tube and the die core to be concentric, so as to ensure the consistency of the distribution of the grease gap in the sleeve, improve the roundness of the sleeve, design the outer side section of the triangular support on the outer end of the existing oil filling nozzle to be highly attached to the inner surface of the die core conical surface, ensure that the oil filling tube and the inner wall of the die core are highly concentric under high temperature conditions, so as to achieve the integrity of the sleeve appearance, greatly simplify the scheme of making the oil filling nozzle and the die core level, use the rotatable center line position limiter and adjuster to finely adjust the center position of the optical fiber ribbon, can improve the problem of the high concentricity of the oil filling tube and the die core during pre-production, production and the whole process of the large sleeve, and can also ensure that the optical fiber ribbon is always located at the center position inside the tube, and improve the roundness of the sleeve.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber processing, in particular to a device for improving the roundness of a matrix optical fiber ribbon tube. Background Art

[0002] The large sleeve production process (optical fiber ribbon structure sheathing) refers to the process of extruding a large sleeve with a large diameter. During this process, the thixotropic fiber paste is injected into the guide tube of the extruder head through the paste, and it is continuously moved forward under the action of the traction wheel. The fiber paste is disturbed and under the action of shear force, the weak HH breaks, and the molecular arrangement changes from a mesh to a line. At this time, the viscous colloid becomes a fluid, and the paste is uniformly injected into the large sleeve. When the disturbing force of the paste is eliminated, the adjacent protons of the weak HH bond will be connected again. Its main purpose is to prevent the radial dripping of the paste of the bundle tube. In addition, the thixotropic paste in the tube is also beneficial to the cable to play a certain protective role during installation or under external force, providing stable signal transmission conditions for the optical fiber.

[0003] During production of a large oil-filling seat, an internal angle wrench is usually used to adjust the 8 eccentric screws on the front, back, left and right of the oil-filling tube bracket. When observing the concentricity from the side of the die mouth, it sometimes seems to be highly concentric, but in fact the outer wall of the oil-filling tube is attached to the conical surface at the tail of the mold core, which causes the oil-filling nozzle to be slightly bent, which will inevitably cause the spirally stranded optical fiber path to always scratch the inner wall of the oil-filling tube, and due to the change in the position of the end of the pipeline, it will also cause the optical fiber ribbon to show a slight "bow shape" in the loose sleeve, affecting the attenuation performance of the optical fiber in the sleeve. In severe cases, the optical fiber stress at the inflection point is even greater than the screening tension of the edge fiber of the optical fiber ribbon itself, resulting in a fiber breakage accident in the tube. At the same time, the above situation will also cause the air pressure on the side attached to the conical surface to be less than the air pressure on the side with a larger gap, which can easily cause a certain micro-eccentricity in the sleeve wall thickness, affecting the mechanical properties of the sleeve and making its lateral pressure resistance unqualified. Secondly, the oil-filled tube is in a high temperature environment (about 260 degrees) on the inner wall of the mold core for a long time, and the centrifugal force of the twisted optical fiber ribbon at the rear will cause the oil-filled tube to be slightly deformed, which will lead to the initial adjustment of "the oil-filled tube is concentric with the mold core", and the production process "the outer wall of the oil-filled tube is attached to the inner wall of the mold core", resulting in the side of the oil-filled tube with less fiber paste entering the hot water tank first to cool down after the mold outlet, and the side of the oil-filled tube with more fiber paste is cooled later; resulting in insufficient crystallization of PBT, uneven outer diameter, and ridges. In addition, the distance between the fulcrum of the optical fiber ribbon in the fiber needle tube and the fulcrum of the wet traction lever position is relatively long, and the casing is basically formed in the hot water tank. Therefore, this structural design has certain defects. Since the distance between the two points is too long (about 5m), and there is no fixed fulcrum at the center, it has a great influence on the roundness of the casing. This design defect will cause the appearance of the matrix optical fiber ribbon bundle tube to be unsightly.

[0004] In view of this, we propose a device for improving the roundness of a matrix optical fiber ribbon tube in order to solve the problems existing in the existing device. Summary of the invention

[0005] The object of the present invention is to provide a device for improving the roundness of a matrix-type optical fiber ribbon tube to solve the problems raised in the above-mentioned background technology. To achieve the above object, the present invention provides the following technical solution: A device for improving the roundness of a matrix-type optical fiber ribbon tube, including a large sleeve oil filling seat and a center line limit adjuster. The end of the large sleeve oil filling seat is fixed with a head, and a discharge hole is opened at the center of the head. A slide rail is horizontally laid at the bottom of the large sleeve oil filling seat, and a slidable slide seat is mounted on the slide rail. A connecting seat is fixed on the slide seat, and an oil filling tube is arranged on the connecting seat. The center line limit adjuster is located in a water tank arranged behind the large sleeve oil filling seat. The center line limit adjuster includes a clamping frame, an inner plate, a longitudinal screw, a transverse screw, a first stop rod and a second stop rod. Two inner plates are fixed at the bottom of the clamping frame, and two longitudinal screws are fixed at the center of the clamping frame. A first stop rod is sleeved on the longitudinal screw. Two transversely adjustable screws are arranged on the left inner plate, and a second stop rod is sleeved on the transverse screw.

[0006] Preferably, one end of the oil filling tube is fixed with a threaded connection head connected to the connecting seat.

[0007] Preferably, the other end of the oil filling tube is sleeved with a slidable triangular bracket. Three positioning pins are evenly fixed on the outer edge of the triangular bracket. Three clamping grooves are evenly opened on the inner wall of the discharge hole. A retaining piece is fixed in the clamping groove, and the positioning pins are respectively directed at the clamping grooves.

[0008] Preferably, a first sleeve disc and a second sleeve disc are sleeved on the oil filling tube near the threaded connection head. Two slidable sleeves are inserted on the first sleeve disc. Two ramming rods are fixed on the second sleeve disc. One end of the sleeve is fixed on the side of the triangular bracket, and the other end of the sleeve is sleeved on the ramming rod.

[0009] Preferably, an inner retaining ring is fixed on the inner wall of the sleeve port. An inner end disc is fixed at the inserted end of the ramming rod. A spring is also sleeved on the inserted end of the ramming rod, and the two ends of the spring are respectively fixed on the inner end disc and the inner retaining ring.

[0010] Preferably, a first position-adjusting bolt is inserted on the end faces on both sides of the clamping frame, and a second position-adjusting bolt is inserted at both ends of the upper surface of the clamping frame.

[0011] Preferably, a "mouth-shaped" limiting hole is formed between the first stop rod and the second stop rod.

[0012] Compared with the prior art, the beneficial effects of the present invention.

[0013] In the present invention, a triangular bracket is provided on the oil filling pipe, and a center line position limiter is provided on the water tank behind the device. Both can adjust the concentricity of the optical fiber ribbon, the oil filling pipe and the die core height, so as to ensure the consistency of the distribution of the grease gap in the sleeve, improve the roundness of the sleeve. The outer side section of the triangular bracket is designed to be closely attached to the inner height of the die core conical surface at the outer end of the existing oil filling pipe nozzle, ensuring the high concentricity of the oil filling pipe and the inner wall of the die core at high temperature, so as to achieve the integrity of the sleeve appearance. Secondly, the distance from the intersection point of the perpendicular line drawn from the outer side section point of the bracket to the center line to the die core nozzle is equal to the position where the oil filling pipe is level with the die core nozzle, which can realize "foolproof pushing" to determine whether the end face of the oil filling pipe is flush with the outer wall end face of the die core, breaking the traditional method of visually judging the level through the front view, greatly simplifying the scheme of making the oil filling nozzle and the die core level. By adding a "left-right-up-down" rotatable center line position limiter in the hot water tank to finely adjust the center position of the optical fiber ribbon, the problem of high concentricity of the oil filling pipe and the die core during pre-production, in-production and the whole process of large sleeves can be improved, and it can also ensure that the optical fiber ribbon is always located at the center position inside the pipe, effectively ensuring the consistency of sleeve crystallization and improving the roundness of the sleeve. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the large sleeve oil filling seat in the present invention;

[0015] Figure 2 It is a schematic diagram of the structure of the center line position limiter in the present invention;

[0016] Figure 3 It is a schematic diagram of the structure of the oil filling pipe in the present invention;

[0017] Figure 4 It is a schematic diagram of the structure of the card slot position in the present invention;

[0018] Figure 5 It is a schematic diagram of the internal structure of the connecting pipe between the sleeve and the sleeve rod in the present invention.

[0019] In the figure: 1. Large sleeve oil filling seat; 2. End head; 3. Discharge hole; 4. Slide rail; 5. Slide seat; 6. Connecting seat; 7. Oil filling pipe; 8. Clamping frame; 9. Inner plate; 10. Longitudinal screw; 11. Transverse screw; 12. Stop bar one; 13. Stop bar two; 14. Adjusting bolt one; 15. Adjusting bolt two; 16. Threaded connection head; 17. Triangular bracket; 18. Sleeve plate one; 19. Sleeve plate two; 20. Positioning pin; 21. Sleeve; 22. Tamping rod; 23. Card slot; 24. Flap; 25. Inner retaining ring; 26. Inner end plate; 27. Spring. Detailed Embodiment

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0021] Please refer to Figures 1 to 5 , the present invention provides a technical solution: a device for improving the roundness of a matrix-type optical fiber ribbon tube, including a large sleeve oil filling seat 1 and a center line position limiter. A end head 2 is fixed at the end of the large sleeve oil filling seat 1. A discharge hole 3 is opened at the center of the end head 2. A slide rail 4 is horizontally laid at the bottom of the large sleeve oil filling seat 1. A slidable slide seat 5 is mounted on the slide rail 4. A connecting seat 6 is fixed on the slide seat 5, and an oil filling pipe 7 is arranged on the connecting seat 6. The center line position limiter is located in a water tank arranged behind the large sleeve oil filling seat 1. The center line position limiter includes a clamping frame 8, an inner plate 9, a longitudinal screw 10, a transverse screw 11, a stop rod one 12 and a stop rod two 13. Two inner plates 9 are fixed at the bottom of the clamping frame 8. Two longitudinal screws 10 are fixed at the center of the clamping frame 8. A stop rod one 12 is sleeved on the longitudinal screw 10. Two adjustable-spacing transverse screws 11 are arranged on the left inner plate 9. A stop rod two 13 is sleeved on the transverse screw 11.

[0022] In this embodiment, one end of the oil filling pipe 7 is fixed with a threaded connector 16 connected to the connecting seat 6.

[0023] In this embodiment, the other end of the oil filling pipe 7 is sleeved with a slidable triangular bracket 17. Three positioning pins 20 are uniformly fixed on the outer edge of the triangular bracket 17. Three card slots 23 are uniformly opened on the inner wall of the discharge hole 3. A retaining piece 24 is fixed in the card slot 23, and the positioning pins 20 are respectively directly opposite to the card slots 23.

[0024] In this embodiment, a first sleeve plate 18 and a second sleeve plate 19 are sleeved on the oil filling pipe 7 near the threaded connector 16. Two slidable sleeves 21 are inserted on the first sleeve plate 18. Two ramming rods 22 are fixed on the second sleeve plate 19. One end of the sleeve 21 is fixed to the side of the triangular bracket 17, and the other end of the sleeve 21 is sleeved on the ramming rod 22.

[0025] In this embodiment, an inner retaining ring 25 is fixed on the inner wall of the port of the sleeve 21. An inner end plate 26 is fixed at the inserted end of the ramming rod 22. A spring 27 is also sleeved on the inserted end of the ramming rod 22. The two ends of the spring 27 are respectively fixed to the inner end plate 26 and the inner retaining ring 25.

[0026] In this embodiment, a first adjustment bolt 14 is inserted on the end faces on both sides of the clamping frame 8, and a second adjustment bolt 15 is inserted at both ends of the upper surface of the clamping frame 8.

[0027] In this embodiment, a limiting hole in the shape of a "square" is formed between the first gear lever 12 and the second gear lever 13.

[0028] Advantages of the present invention: When the matrix-type optical fiber ribbon tube roundness improvement device is in use, the center line limiting regulator is placed at the end of the hot water tank (about 3 m away from the die outlet). The empty tube is manually set to a relatively low rotation speed, and the fiber paste sequentially passes through the limiting hole (the upper and lower gaps are fixed, and the left and right can be slightly spread out), the traction wheel, the cold water tank, the caterpillar traction wheel, the pneumatic tension wheel, and the take-up frame. The clamping frame 8 is locked on the outer wall of the water tank by rotating the adjusting bolts 14 on both sides. The height of the second gear lever 13 is adjusted by rotating the two adjusting bolts 15. At this time, first, multiple optical fiber ribbons of the cage are passed through the grille, the pre-filling device, and the die, and 2-3 m of optical fiber ribbon is pulled out and sent into the fiber needle tube and the oil filling tube 7 on the front fixed slide rail 4. The linkage process has set the extrusion and grease parameters and the cage device to be synchronized. Then, by observing the conical surface at the forming position of the die outlet, it is visually inspected whether the optical fiber ribbon is located at the center position. If the optical fiber ribbon is close to the left side of the water tank, loosen the adjusting bolt 14 on the right side and tighten the adjusting bolt 14 on the left side to move the limiting hole to the right. In the same way, if the optical fiber ribbon in the conical tube is close to the lower side, tighten the two adjusting bolts 15 to lift the limiting hole. On the contrary, if the optical fiber ribbon is close to the upper side, loosen the two adjusting bolts 15 to lower the limiting hole, fully ensuring that the four rotatable gear levers are tangent to the outer wall of the sleeve. By the above method, not only can the concentricity problem of the oil filling tube and the die core height during the pre-production, in-production, and full process of the large sleeve be improved, but also it can be ensured that the optical fiber ribbon is always located at the center position inside the tube, effectively ensuring the crystallization consistency of the sleeve and improving the roundness of the sleeve. When the oil filling tube 7 extends into the discharge hole 3 in the end head 2, the positioning pin 20 on the triangular support 17 accurately inserts into the card slot 23, and the baffle 24 blocks the triangular support 17 from further advancing. The spring 27 is compressed, and the oil filling tube 7 can continue to extend, ensuring that the oil filling tube 7 and the inner wall of the die core are highly concentric under high temperature conditions. When the oil filling tube 7 retracts, the triangular support 17 disengages from the discharge hole 3 and automatically resets under the top force of the spring 27, ensuring that the triangular support 17 is always located at the front end of the oil filling tube 7, thereby achieving a complete appearance of the sleeve. Secondly, the positioning pin 20 is tightly inserted into the card slot 23 to prevent the oil filling tube 7 from shaking and limit it, ensuring that the end face of the oil filling tube 7 is flush with the outer wall end face of the die core, breaking the traditional method of visually judging the flatness through front visual inspection, and greatly simplifying the flatness scheme of the oil filling tube 7 and the die core.

[0029] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0030] In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A device for improving the roundness of a matrix-type optical fiber ribbon tube, comprising a large sleeve oil filling seat (1) and a center line position limiter, characterized in that: The end of the large oil-filled seat (1) is fixed with a head (2). An outlet hole (3) is provided at the center of the head (2). A slide rail (4) is horizontally laid at the bottom of the large oil-filled seat (1). A slidable slide seat (5) is mounted on the slide rail (4). A connecting seat (6) is fixed on the slide seat (5), and an oil filling pipe (7) is arranged on the connecting seat (6). The center line limit adjuster is located in a water pool arranged behind the large oil-filled seat (1). The center line limit adjuster includes a clamping frame (8), an inner plate (9), a longitudinal screw rod (10), a transverse screw rod (11), a first stop rod (12) and a second stop rod (13). Two inner plates (9) are fixed at the bottom of the clamping frame (8). Two longitudinal screw rods (10) are fixed at the center of the clamping frame (8). A first stop rod (12) is sleeved on the longitudinal screw rod (10). Two transversely adjustable screw rods (11) are arranged on the left inner plate (9). A second stop rod (13) is sleeved on the transverse screw rod (11). One end of the oil filling pipe (7) is fixed with a threaded connector (16) connected to the connecting seat (6). The other end of the oil filling pipe (7) is sleeved with a slidable triangular bracket (17). Three positioning pins (20) are evenly fixed on the outer edge of the triangular bracket (17). Three card slots (23) are evenly provided on the inner wall of the outlet hole (3). A retaining piece (24) is fixed in the card slot (23), and the positioning pins (20) are respectively directed at the card slots (23). A first sleeve plate (18) and a second sleeve plate (19) are sleeved on the oil filling pipe (7) near the threaded connector (16). Two slidable sleeves (21) are inserted on the first sleeve plate (18). Two ramming rods (22) are fixed on the second sleeve plate (19). One end of the sleeve (21) is fixed on the side of the triangular bracket (17). The other end of the sleeve (21) is sleeved on the ramming rod (22). An inner retaining ring (25) is fixed on the inner wall of the port of the sleeve (21). An inner end plate (26) is fixed at the inserted end of the ramming rod (22). A spring (27) is also sleeved on the inserted end of the ramming rod (22). The two ends of the spring (27) are respectively fixed on the inner end plate (26) and the inner retaining ring (25).

2. The matrix-type optical fiber ribbon tube rounding improvement device according to claim 1, wherein: Adjusting bolts one (14) are inserted on the end faces on both sides of the clamping frame (8). Adjusting bolts two (15) are inserted at both ends of the upper surface of the clamping frame (8).

3. A device for improving the roundness of a matrix-type optical fiber ribbon tube according to claim 1, characterized in that: A "mouth-shaped" limit hole is formed between the first stop rod (12) and the second stop rod (13).

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