Air-blowing optical fiber matched indoor optical cable and preparation device thereof

Abstract

The utility model relates to the technical field of optical cable manufacturing and processing, and discloses an air-blowing optical fiber matched indoor optical cable, which comprises a sheath layer, a sleeve and reinforcers, the sleeve is arranged in the middle of the sheath layer, the reinforcers made of steel wires are inserted in the upper part and the lower part of the sheath layer in a penetrating manner, and the cross section of the sheath layer is butterfly-shaped. A preparation device of an indoor optical cable comprises a sleeve forming machine and a sheath forming mold, the sleeve forming machine comprises a plastic coating mold, the plastic coating mold adopts a regular polygon design, and the right part of the plastic coating mold is a sleeve mold sleeve; the additionally arranged sheath layer, the casing pipe and the reinforcer are laid after being designed according to the structure, and different types of cables can be blown in according to requirements, so that the occupied pipeline space is reduced; the added reinforcer can reinforce the firmness of the sheath layer, can improve the capability of resisting external interference, and can effectively resist the influence of mechanical damages such as pulling, lateral bending and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of optical cable manufacturing and processing, in particular to an indoor optical cable compatible with blown optical fiber and a preparation device thereof. Background Technique

[0002] With the rapid development of the information network and the growth of data traffic, the construction and laying requirements of optical fiber cables are increasing day by day. Optical fiber cables are usually laid in pipelines. With the increase in the demand quantity, more pipelines are needed to carry them.

[0003] At present, two methods of blown optical cable and blown optical fiber are mainly adopted to reduce the volume of optical fiber cables, improve the laying density of optical fibers, utilize the existing pipeline resources to increase the communication capacity of optical fiber cables, and improve the construction efficiency of new pipe networks and greatly reduce the construction investment.

[0004] The blown optical cable is mainly applied to the laying of outdoor optical cables. Its principle mainly involves using the method of high-pressure air blowing to blow the optical cable into the pre-buried silicon core pipe. This process is realized by a cable blowing machine, which blows high-pressure and high-speed compressed air into the silicon core pipe. The high-pressure air flow pushes the air seal piston, thus forming a settable uniform pulling force on the optical cable. At the same time, the hydraulic crawler conveying mechanism of the cable blowing machine clamps the optical cable and conveys it forward, forming a conveying force. The combined action of the pulling force and the conveying force makes the inserted optical cable quickly pass through the pipeline in a suspended state along with the high-speed air flow.

[0005] The blown optical fiber is mainly applied to the laying of indoor optical cables. Its principle is similar to that of the blown optical cable. First, it is necessary to lay an optical cable pipeline between buildings. There is a microtube inside the pipeline, and the pipeline can effectively provide mechanical protection for the microtube. Then, compressed air is used to blow the optical fiber into the microtube in the building. This method has flexibility that cannot be compared with traditional optical fiber systems. By using microtubes with different diameters, different blowing distances can be achieved, and there are clear regulations on the minimum bending radius of a single microtube in the indoor environment, ensuring the effective laying of optical fibers.

[0006] However, whether it is the method of blown optical cable or blown optical fiber, there are certain structural defects:

[0007] When the optical cable faces mechanical damages such as pulling and side bending, the traditional protective layer structure cannot effectively resist, resulting in the damage of the optical cable and affecting the communication quality;

[0008] When laying the optical cable, especially when using the blown optical fiber technology, the traditional sleeve design is not conducive to the smooth drainage of air flow, increasing the construction difficulty and time cost;

[0009] Traditional optical cables and their preparation devices lack sufficient flexibility and scalability when dealing with different network requirements and wiring scenarios, restricting their application scope;

[0010] Traditional preparation methods rely on a large amount of manual operations, resulting in increased manufacturing costs and low production efficiency, while also increasing the risk of human errors. Summary of the Utility Model

[0011] To achieve the above object, the present utility model provides the following technical solution: An indoor optical cable compatible with blown optical fiber, comprising:

[0012] A sheath layer, a sleeve, and a strengthening member. A sleeve is installed in the middle of the sheath layer. The sleeve is a regular hexagon, and the inner wall of the sleeve is designed in a regular hexagon spiral. Strengthening members made of steel wires are inserted through the upper and lower parts of the sheath layer. The cross-section of the sheath layer is butterfly-shaped.

[0013] A preparation device for an indoor optical cable, comprising: a sleeve forming machine and a sheath forming die. The sleeve forming machine includes a plastic sheathing die. The plastic sheathing die is designed in a regular polygon. The right part of the plastic sheathing die is a sleeve die sleeve, and a sleeve die sleeve hole is provided in the inner cavity of the sleeve die sleeve;

[0014] A sleeve die, disposed inside the plastic sheathing die. A sleeve die core is installed on the inner wall of the sleeve die. A sleeve die core hole is provided in the inner cavity of the sleeve die core;

[0015] A torsion mechanism base, disposed on the right side of the plastic sheathing die. A sleeve torsion mechanism is installed inside the torsion mechanism base. A rotating shaft rod is installed on the surface of the sleeve torsion mechanism. Pressure springs are installed in the upper and lower parts of the inner cavity of the rotating shaft rod, and pressing plates are installed at the inner ends of the pressure springs;

[0016] A gear disk, disposed on the right side of the torsion mechanism base. A slow-speed motor is provided on the front of the gear disk. A synchronous belt is sleeved between the rotor of the slow-speed motor and the gear disk. A take-up reel is provided on the right side of the gear disk;

[0017] The sheath forming die includes a sheath die core. A sheath die core hole is provided inside the sheath die core. Reinforcing member holes are provided in the upper and lower parts of the surface of the sheath die core hole. A sleeve hole is provided in the middle of the surface of the sheath die core hole;

[0018] A sheath die sleeve, disposed outside the sheath die core. A sheath die sleeve hole is provided in the inner cavity of the sheath die sleeve, and a die groove is provided on the surface of the sheath die sleeve hole.

[0019] Preferably, the sleeve passes through the sleeve die sleeve hole, the sleeve die core hole, and the sleeve torsion mechanism and is wound around the surface of the take-up reel, so that the take-up reel can take up the formed sleeve.

[0020] Preferably, a plastic extruder is connected to the feeding end of the casing forming machine, and a resin extruder is connected to the feeding end of the sheath forming die. The plastic extruder can extrude the materials required for casing production through the sleeve plasticizing die, and the resin extruder can extrude the materials required for sheath layer production through the sheath forming die.

[0021] Preferably, a gasket is installed on the surface of the sheath die core, and the sheath die sleeve is snap-fitted on the surface of the sheath die core. The sheath die sleeve and the sheath die core are combined to form a sheath forming die.

[0022] Preferably, pin fixing holes are provided in both the upper and lower parts of the surface of the sheath die sleeve. Pins are installed at the corresponding positions of the sheath die core. The pin fixing holes are sleeved on the surface of the pins, and the gasket is located on the outer periphery of the pins. The sheath die sleeve and the sheath die core can be firmly connected through the pins and the pin fixing holes.

[0023] Beneficial effects

[0024] Compared with the prior art, the present utility model provides a blowable fiber optic cable for indoor use and its preparation device, which has the following beneficial effects:

[0025] 1. By integrating a reinforcing member made of steel wire in the sheath layer, the present utility model significantly improves the firmness and anti-external interference ability of the optical cable, can effectively resist mechanical damages such as pulling and side bending, and ensures the long-term use stability of the optical cable.

[0026] 2. The inner wall of the casing of the present utility model is designed as a regular hexagon spiral structure, which is convenient for the diversion of air flow during the construction of blowable fiber optic cables, reduces the construction difficulty, improves the construction efficiency. At the same time, this design allows different types of blowable fiber optic cables to be blown into the casing, flexibly meets different network requirements, reduces the occupation of pipeline space, and increases the distance of blowable laying.

[0027] 3. The preparation device of the present utility model adopts a combination of a casing forming machine and a sheath forming die, realizes the automatic extrusion of materials through a plastic extruder and a resin extruder, and uses a casing torsion mechanism to precisely twist the casing to ensure that the internal structure of the casing meets the design requirements. The design of the pressure spring can adjust the distance between the pressing plates according to the outer diameter of the casing, avoids material damage, and realizes a flexible and efficient production process.

[0028] 4. The sheath forming die of the present utility model is composed of a sheath die core and a sheath die sleeve, and is connected and fixed through pins and gaskets. The modular design is convenient for maintenance and replacement, improves the flexibility and service life of the equipment.

[0029] 5. The overall preparation process of the present utility model is compact and highly automated, which can greatly improve the production efficiency of optical cables. At the same time, it reduces manual intervention, lowers production costs and the human error rate, and ensures the quality and consistency of optical cables.

[0030] 6. The indoor optical cable and its preparation device of the present utility model are not only applicable to the air-blown fiber system, but also can adjust materials and structures according to specific requirements, and are widely used in various indoor wiring scenarios, with stronger applicability and expandability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural view of the sheath layer of the present utility model;

[0032] Figure 2 It is a schematic structural view of the sleeve forming machine of the present utility model;

[0033] Figure 3 For the present utility model attached Figure 2 It is an enlarged structural view at A in

[0034] Figure 4 It is a cross-sectional structural view of the sheathing die of the present utility model;

[0035] Figure 5 It is a schematic structural view of the sleeve die of the present utility model;

[0036] Figure 6 It is a schematic structural view of the sleeve die sleeve of the present utility model;

[0037] Figure 7 It is a schematic structural view of the sheath forming die of the present utility model;

[0038] Figure 8 It is a schematic structural view of the sheath die core of the present utility model;

[0039] Figure 9 It is a right view structural view of the sheath die core of the present utility model;

[0040] Figure 10 For the present utility model attached Figure 9 It is an enlarged structural view at B in

[0041] Figure 11 It is a schematic structural view of the sheath die sleeve of the present utility model;

[0042] Figure 12 It is a right view structural view of the sheath die sleeve of the present utility model.

[0043] In the figure: 1. Sheath layer; 2. Sleeve; 3. Reinforcement; 4. Sheathing die; 5. Sleeve die holder; 6. Sleeve die holder hole; 7. Sleeve die; 8. Sleeve die core; 9. Sleeve die core hole; 10. Torsion mechanism base; 11. Sleeve torsion mechanism; 12. Rotating shaft rod; 13. Pressure spring; 14. Pressing plate; 15. Gear disc; 16. Slow-speed motor; 17. Synchronous belt; 18. Take-up reel; 19. Sheath die core; 20. Gasket; 21. Pin shaft; 22. Sheath die core hole; 23. Reinforcement hole; 24. Sleeve hole; 25. Sheath die holder; 26. Pin shaft fixing hole; 27. Sheath die holder hole; 28. Die groove. Detailed implementation manner

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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 shall fall within the protection scope of the present invention.

[0045] The present invention provides a technical solution, an indoor optical cable for air-blown optical fiber, please refer to Figure 1 , including a sheath layer 1, a sleeve 2 and a reinforcement 3. A sleeve 2 is installed in the middle of the sheath layer 1. The sleeve 2 is a regular hexagon, and the inner wall of the sleeve 2 is designed in a regular hexagon spiral. Reinforcements 3 made of steel wires are inserted through the upper and lower parts of the sheath layer 1. The cross-section of the sheath layer 1 is butterfly-shaped;

[0046] The reinforcement 3 can strengthen the firmness of the sheath layer 1, improve the ability to resist external interference, and effectively resist the influence of mechanical damages such as pulling and side bending.

[0047] A preparation device for an indoor optical cable includes: a sleeve forming machine and a sheath forming die. Please refer to Figure 2 , the sleeve forming machine includes a sheathing die 4. The sheathing die 4 is designed in a regular polygon. Please refer to Figure 4 , the right part of the sheathing die 4 is a sleeve die holder 5. Please refer to Figure 6 , a sleeve die holder hole 6 is opened in the inner cavity of the sleeve die holder 5;

[0048] Please refer to Figure 4 , a sleeve die 7 is arranged inside the sheathing die 4. Please refer to Figure 5 , a sleeve die core 8 is installed on the inner wall of the sleeve die 7, and a sleeve die core hole 9 is opened in the inner cavity of the sleeve die core 8;

[0049] Please refer to Figure 2, The twisting mechanism base 10 is arranged on the right side of the sheathing die 4. Inside the twisting mechanism base 10, a sleeve twisting mechanism 11 is installed. Please refer to Figure 3 , On the surface of the sleeve twisting mechanism 11, a rotating shaft rod 12 is installed. Pressure springs 13 are installed in both the upper and lower parts of the inner cavity of the rotating shaft rod 12, and pressing plates 14 are installed at the inner ends of the pressure springs 13;

[0050] Please refer to Figure 2 , A gear disk 15 is arranged on the right side of the twisting mechanism base 10. A slow-speed motor 16 is provided on the front surface of the gear disk 15. A synchronous belt 17 is sleeved between the rotor of the slow-speed motor 16 and the gear disk 15. A wire winding disk 18 is provided on the right side of the gear disk 15;

[0051] Please refer to Figure 7 、 Figure 8 and Figure 9 , The sheathing forming die includes a sheathing die core 19. A sheathing die core hole 22 is opened inside the sheathing die core 19. Please refer to Figure 10 , Reinforcing holes 23 are opened in both the upper and lower parts of the surface of the sheathing die core hole 22, and a sleeve hole 24 is opened in the middle part of the surface of the sheathing die core hole 22;

[0052] Please refer to Figure 11 , A sheathing die sleeve 25 is arranged outside the sheathing die core 19. A sheathing die sleeve hole 27 is opened in the inner cavity of the sheathing die sleeve 25. Please refer to Figure 12 , A die groove 28 is opened on the surface of the sheathing die sleeve hole 27;

[0053] The inner wall of the sleeve 2 is in a regular hexagonal spiral structure, which is convenient for the air flow to drain during the air blowing of optical fibers for construction.

[0054] The sheathing die 4 adopts a regular polygon design. Through the sleeve twisting mechanism 11, it is twisted in the non-plastic stage to change its internal structure into a spiral shape.

[0055] The sleeve twisting mechanism 11 clamps the polygonal sleeve 2 through two pressing plates 14, and the slow-speed motor 16 drives to apply the twist.

[0056] The pressing plate 14 is fixed on the rotating shaft rod 12 through the pressure spring 13. The pressure spring 13 can adjust the vertical distance by stretching according to the outer diameter of the sleeve 2, ensuring that the twist is effectively applied without damaging the sleeve 2.

[0057] The reinforcing member 3 passing through the reinforcing hole 23 can be a metal reinforcing member 3 or a non-metal reinforcing member 3. After the indoor optical cable for air blowing optical fiber is designed according to this structure and laid, different types of air blowing optical fibers designed for the air blowing optical fiber structure can be blown into the sleeve 2 according to actual needs during construction, reducing the space occupied by the pipeline, and the air blowing of optical fibers will not be affected by the optical fiber structure, reducing the construction difficulty and increasing the air blowing laying distance.

[0058] The sleeve 2 passes through the sleeve die bushing hole 6, the sleeve die core hole 9 and the sleeve twisting mechanism 11 and winds around the surface of the take-up reel 18, enabling the take-up reel 18 to take up the formed sleeve 2.

[0059] The feeding end of the sleeve forming machine is connected with a plastic extrusion machine, and the feeding end of the sheath forming die is connected with a resin extrusion machine. Through the plastic extrusion machine, the materials required for producing the sleeve 2 can be extruded through the sleeve plasticizing die 4, and through the resin extrusion machine, the materials required for producing the sheath layer 1 can be extruded through the sheath forming die.

[0060] A gasket 20 is installed on the surface of the sheath die core 19, and the sheath die bushing 25 is clamped on the surface of the sheath die core 19. The sheath die bushing 25 and the sheath die core 19 are combined to form a sheath forming die.

[0061] Pin shaft fixing holes 26 are provided in both the upper and lower parts of the surface of the sheath die bushing 25. Pin shafts 21 are installed at the corresponding positions of the sheath die core 19 and the pin shaft fixing holes 26. The pin shaft fixing holes 26 are sleeved on the surface of the pin shafts 21, and the gasket 20 is located on the outer periphery of the pin shafts 21. The sheath die bushing 25 and the sheath die core 19 can be firmly connected through the pin shafts 21 and the pin shaft fixing holes 26.

[0062] The working process of this device is as follows: First, through the plastic extrusion machine, the materials required for producing the sleeve 2 can be extruded through the sleeve plasticizing die 4. Starting the slow-speed motor 16 can drive the gear disk 15 to rotate through the synchronous belt 17, and then drive the rotating shaft rod 12 to rotate. Then, the distance between the sheath die core 19 and the sheath die bushing 25 is adjusted through the gasket 20 to control the die distance, so that the sleeve can be twisted through the sleeve twisting mechanism 11 during the non-plastic stage to change its internal structure into a spiral shape, and the take-up reel 18 winds up the sleeve 2. Finally, the sleeve plasticizing die 4 and the twisting mechanism base 10 are replaced with a sheath forming die. The sleeve 2 and two reinforcing members 3 are passed through the sheath die bushing hole 27 and the reinforcing member hole 23 on the sheath die core hole 22. The resin extrusion machine connected to the outside of the sheath forming die is started to generate the sheath layer 1, and finally the resin material, the sleeve 2 and the two reinforcing members 3 are respectively plasticized through the sheath die core 19 and the sheath die bushing 25 to form an optical cable structure with the sheath layer 1, the sleeve 2 and the two reinforcing members 3, thus realizing the preparation of the indoor optical cable for blowing optical fiber.

[0063] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0064] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An indoor optical cable equipped with air-blown optical fiber, characterized in that: include: A sheath layer (1), a sleeve (2) and a reinforcement member (3), wherein the middle part of the sheath layer (1) is provided with a sleeve (2), the sleeve (2) is in the shape of a regular hexagon, and the inner wall of the sleeve (2) is in the shape of a regular hexagonal spiral, and reinforcement members (3) made of steel wire are inserted through the upper and lower parts of the sheath layer (1), and the cross section of the sheath layer (1) is in the shape of a butterfly.

2. A preparation device for an indoor optical cable, comprising: A sleeve forming machine and a sheath forming mold, characterized in that: the sleeve forming machine comprises a sleeve mold (4), the sleeve mold (4) is designed as a regular polygon, the right part of the sleeve mold (4) is a sleeve mold sleeve (5), and the inner cavity of the sleeve mold sleeve (5) is provided with a sleeve mold sleeve hole (6); A sleeve mold (7) is arranged inside the sleeve mold (4), a sleeve mold core (8) is installed on the inner wall of the sleeve mold (7), and a sleeve mold core hole (9) is opened in the inner cavity of the sleeve mold core (8); A torsion mechanism base (10) is arranged on the right side of the sleeve mold (4), a sleeve torsion mechanism (11) is installed inside the torsion mechanism base (10), a rotating shaft (12) is installed on the surface of the sleeve torsion mechanism (11), pressure springs (13) are installed at the upper and lower parts of the inner cavity of the rotating shaft (12), and a pressure plate (14) is installed at the inner end of the pressure spring (13); A gear plate (15) is arranged on the right side of the torsion mechanism base (10), a slow-speed motor (16) is arranged on the front side of the gear plate (15), a synchronous belt (17) is sleeved between the rotor of the slow-speed motor (16) and the gear plate (15), and a take-up plate (18) is arranged on the right side of the gear plate (15); The jacket forming mold comprises a jacket core (19) inside, a jacket core hole (22) is provided inside the jacket core (19), reinforcement holes (23) are provided at the upper and lower parts of the surface of the jacket core hole (22), and a sleeve hole (24) is provided at the middle part of the surface of the jacket core hole (22); A jacket mold sleeve (25) is arranged outside the jacket mold core (19), a jacket mold sleeve hole (27) is provided in the inner cavity of the jacket mold sleeve (25), and a mold groove (28) is provided on the surface of the jacket mold sleeve hole (27).

3. The device for preparing an indoor optical cable according to claim 2, characterized in that: The sleeve (2) passes through the sleeve mold sleeve hole (6), the sleeve mold core hole (9) and the sleeve twisting mechanism (11) and is wound around the surface of the take-up drum (18).

4. The device for preparing an indoor optical cable according to claim 2, characterized in that: The feeding end of the sleeve forming machine is connected to a plastic extruder, and the feeding end of the sheath forming mold is connected to a resin extruder.

5. The device for preparing an indoor optical cable according to claim 2, characterized in that: A gasket (20) is installed on the surface of the jacket mold core (19), and the jacket mold sleeve (25) is clamped on the surface of the jacket mold core (19).

6. The device for preparing an indoor optical cable according to claim 2, characterized in that: The upper and lower parts of the surface of the jacket mold sleeve (25) are provided with pin shaft fixing holes (26), and the jacket mold core (19) and the corresponding positions of the pin shaft fixing holes (26) are both provided with pin shafts (21), and the pin shaft fixing holes (26) are sleeved on the surface of the pin shaft (21).

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