A combined butterfly-shaped optical cable and its processing method

Abstract

This invention relates to the field of optical cable technology, and more particularly to a combined butterfly-shaped optical cable and its processing method. It includes an optical fiber, the optical fiber being wavy, and a plurality of spaced-apart support sleeves. The optical fiber is provided with a plurality of first compression members, each of which is slidably connected to a second compression member. A compression sleeve is fixedly connected between each of the first compression members and its corresponding second compression member. A compression block is fixedly connected to each compression sleeve. The optical fiber is provided with an insulating sheath. This invention, by making the optical fiber wavy, utilizes the compression sleeves at the deformation points of the insulating sheath to trigger the movement of the compression blocks when the optical cable is bent or stretched. This causes the corresponding support sleeves to deform, and the support sleeves push the wave crests on the optical fiber located at the deformation points of the insulating sheath. This allows the optical fiber to actively straighten along with the deformation of the insulating sheath, reducing the probability of damage to the internal optical fiber due to tensile stress caused by the deformation of the insulating sheath, thereby enhancing the stability of the optical cable during use.

Description

Technical Field

[0001] This invention relates to the field of optical cable technology, and in particular to a combined butterfly-shaped optical cable and its processing method. Background Technology

[0002] The core feature of the composite butterfly optical cable (also known as "composite butterfly drop cable" or "hybrid optoelectronic butterfly cable") is that it integrates additional functional units (such as power lines, copper wires, and reinforcement components) on the basis of the traditional butterfly optical cable. Due to its compact structure, light weight, and ease of installation, the butterfly optical cable is widely used in fiber-to-the-home, indoor and outdoor cabling, and communication network access. Traditional composite butterfly optical cables typically include optical fibers, insulation, and reinforcement components. In actual use, the optical cable will be subjected to bending (such as when the cable is suspended and affected by its own weight). External forces such as bending and tension (e.g., localized tension caused by bending of the optical cable, and pulling force on the optical cable during construction) affect the optical cable. In existing technologies, the optical cable is supported by reinforcing members filled inside the insulation. However, even with reinforcing and buffering structures, the conductors inside the optical cable are still under tension when the optical cable is under tension. Furthermore, if relative displacement occurs between the insulation and the reinforcing members during the tension process, the optical fibers inside the optical cable will be damaged by tension, which will affect the stability of signal transmission during the use of the optical cable. Summary of the Invention

[0003] In order to overcome the shortcomings mentioned in the background art, the present invention provides a combined butterfly optical cable and a processing method thereof.

[0004] Technical solution: A combined butterfly-shaped optical cable includes an optical fiber, the optical fiber being wavy, and a plurality of spaced-apart support sleeves on the optical fiber. A plurality of spaced-apart first extrusion members are provided on both sides of the optical fiber, the number of the first extrusion members being the same as the number of support sleeves. A second extrusion member is slidably connected to each of the first extrusion members. An extrusion sleeve is fixedly connected between each of the first extrusion members and the corresponding second extrusion member. An extrusion block is fixedly connected to each extrusion sleeve, the extrusion block being used to extrude the corresponding support sleeve. The optical fiber is provided with an insulating sheath, and the support sleeves, the first extrusion members, and the second extrusion members are all fixedly connected to the insulating sheath.

[0005] Preferably, a first protective strip is fixed between the first extrusion member and the second extrusion member on the side away from the corresponding extrusion sleeve, and a second protective strip is fixed between two adjacent support sleeves. All the second protective strips together wrap the optical fiber, and both the first and second protective strips are located inside the insulating sheath.

[0006] Preferably, the elastic coefficient of the first protective strip is greater than that of the second protective strip.

[0007] Preferably, both the first protective strip and the second protective strip are airbag structures, and the first protective strip is connected to the corresponding second protective strip.

[0008] Preferably, all the first protective strips and all the second protective strips are staggered.

[0009] Preferably, the first protective strip is provided with a plurality of first elastic pieces and a plurality of second elastic pieces spaced apart. The first elastic pieces and the second elastic pieces located at the edges of the first protective strip are fixedly connected to the first protective strip. All the first elastic pieces and all the second elastic pieces in the same first protective strip are spaced apart, and the first elastic piece is fixedly connected to the adjacent second elastic piece.

[0010] Preferably, the first elastic sheet and the adjacent second elastic sheet are provided with slots on their opposite sides.

[0011] Preferably, the first protective strip is fixed with a plurality of cards, the number of which is the same as the number of card slots, and the cards are used to limit the movement of adjacent card slots.

[0012] Preferably, both the first and second elastic sheets are arc-shaped, and the card is tilted.

[0013] A method for processing a combined butterfly optical cable, based on the aforementioned combined butterfly optical cable, includes the following specific steps:

[0014] S1: The first extruder, the second extruder, the extrusion sleeve and the extrusion block are pre-assembled so that the first extruder and the second extruder slide against each other and clamp the extrusion sleeve.

[0015] S2: The optical fiber is continuously bent using a periodic bending device, and several support sleeves are intermittently wrapped around different peaks of the optical fiber.

[0016] S3: Wrap the second protective strip around the optical fiber, alternately set the support sleeve and the second protective strip, install several alternately distributed first elastic pieces and several second elastic pieces inside the first protective strip, fix the card inserted into the slot on the first protective strip, connect the first protective strip to the corresponding second protective strip, and seal the first and second protective strips with air.

[0017] S4: Secure the assembled first extrusion piece and second extrusion piece between the two first protective strips, so that the extrusion block is close to the corresponding support sleeve;

[0018] S5: The optical fiber, which has been assembled with the support sleeve, the first extrusion piece, the second extrusion piece, the extrusion sleeve, the extrusion block, the first protective strip, and the second protective strip, is placed into the optical cable extrusion mold, and an insulating layer is wrapped around the outside by an extruder.

[0019] This invention has the following advantages: By setting the optical fiber in a wavy shape, when the optical cable is bent and stretched, the extrusion sleeve at the deformation point of the insulation triggers the movement of the extrusion block, causing the corresponding support sleeve to deform. The support sleeve pushes the wave crest on the optical fiber located at the deformation point of the insulation, so that the optical fiber actively tends to straighten along with the deformation of the insulation, reducing the probability of damage to the internal optical fiber due to tensile stress caused by insulation deformation, thereby enhancing the stability of the optical cable during use. The first protective strips on both sides of the optical fiber support the insulation. When the first protective strip is compressed, the gas inside the first protective strip is forced into the corresponding second protective strip. The expansion of the second protective strip enhances the strength of the second protective strip in supporting the insulation, thereby reducing the probability of the optical fiber being damaged by pressure and improving the safety of the optical cable during use. The card supports the slot to buffer the deformation of the first and second elastic sheets, enhancing the bending, tensile, and compressive strength of the first and second elastic sheets, and improving the safety of the optical cable during use. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a three-dimensional cross-sectional view of the insulating sheath of the present invention;

[0022] Figure 3 This is a three-dimensional structural diagram of the first and second protective strips of the present invention;

[0023] Figure 4 This is a three-dimensional structural cross-sectional view of the first extrusion member and the second extrusion member of the present invention;

[0024] Figure 5 This is a three-dimensional structural diagram of the first and second elastic sheets of the present invention;

[0025] Figure 6 This is a three-dimensional structural diagram of the card slot and card of the present invention.

[0026] In the attached diagram, the following are the reference numerals: 1. Optical fiber; 2. Support sleeve; 3. First extrusion piece; 4. Second extrusion piece; 5. Extrusion sleeve; 6. Extrusion block; 7. First protective strip; 8. Second protective strip; 9. Insulating skin; 10. First elastic sheet; 11. Second elastic sheet; 12. Card slot; 13. Card. Detailed Implementation

[0027] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0028] Example 1

[0029] A type of combined butterfly optical cable, such as Figures 1-4 As shown in the diagram, only a section of optical cable is used for illustration. It includes an optical fiber 1, which is wavy. Several support sleeves 2, made of elastic material, are spaced around the fiber 1 and located at the crests of the fiber 1. The fiber 1 passes through all the support sleeves 2. The positions on adjacent support sleeves 2 for the fiber 1 to pass through are staggered. Several first extrusion members 3, spaced apart, are located on both sides of the fiber 1. The number of first extrusion members 3 is the same as the number of support sleeves 2. Second extrusion members 4 are slidably connected to the first extrusion members 3. Both the first extrusion members 3 and the adjacent second extrusion members 4 are formed by joining upper and lower parts to facilitate the production and installation of the first extrusion members 3 and 4. An extrusion sleeve 5, also made of elastic material, is fixed between the first extrusion member 3 and the corresponding second extrusion member 4. When the optical cable is bent or stretched, the first extrusion members 3 and 4 move in opposite directions (the size of the hole on the first extrusion member 3 for the adjacent second extrusion member 4 to slide is larger than the size of the sliding part of the first extrusion member 3, and the size of the hole on the second extrusion member 4 for the adjacent first extrusion member 4 to slide is larger than the size of the sliding part of the first extrusion member 3). The size of the sliding hole of the pressure member 3 is larger than the size of the sliding part of the second pressure member 4, thus providing a relative bending space allowance for the first pressure member 3 and the adjacent second pressure member 4. The first pressure member 3 and the second pressure member 4 compress the adjacent pressure sleeve 5. The pressure sleeve 5 is fixedly connected to the pressure block 6, which is used to compress the corresponding support sleeve 2. The optical fiber 1 is provided with an insulating skin 9. The support sleeve 2, the first pressure member 3 and the second pressure member 4 are all fixedly connected to the insulating skin 9. When the optical cable is bent and stretched, the insulating skin 9 deforms. Taking one of the first pressure members 3 at the deformation point of the insulating skin 9 as an example, the first pressure member 3 and the adjacent second pressure member 4 move in opposite directions. The pressure sleeve 5 is deformed and drives the pressure block 6 to move, causing the support sleeve 2 to deform. During the deformation process, the support sleeve 2 pushes the corresponding peak on the optical fiber 1, and the corresponding peak on the optical fiber 1 has a tendency to be straightened. This makes the optical fiber 1 actively have a tendency to straighten following the deformation of the insulating skin 9, reducing the probability of the optical fiber 1 being damaged by tension due to the deformation of the insulating skin 9, thereby enhancing the stability of the optical cable during use.

[0030] like Figures 2-4As shown, a first protective strip 7 is fixedly connected between the first extrusion member 3 and the second extrusion member 4 on the side away from the corresponding extrusion sleeve 5, and a second protective strip 8 is fixedly connected between two adjacent support sleeves 2. All the second protective strips 8 together wrap the optical fiber 1. The height of the first protective strip 7 is greater than the height of the second protective strip 8, and the elastic coefficient of the first protective strip 7 is greater than the elastic coefficient of the second protective strip 8. This is used to enhance the support strength of the first protective strip 7. When the optical cable is compressed, the first protective strip 7 is compressed first, protecting the optical fiber 1 wrapped in the second protective strip 8 and reducing the probability of the optical fiber 1 being damaged by compression. This ensures the strength and safety of the optical cable during use. Both the first protective strip 7 and the second protective strip 8 are located inside the insulation sheath 9.

[0031] Example 2

[0032] Based on Example 1, such as Figure 3 and Figure 5 As shown, both the first protective strip 7 and the second protective strip 8 are airbag structures. A gap (not shown in the figure) is provided between the second protective strip 8 and the optical fiber 1 to reduce the compressive force exerted by the second protective strip 8 on the optical fiber 1. The first protective strip 7 is connected to the corresponding second protective strip 8. When the first protective strip 7 is compressed, the gas inside the first protective strip 7 is forced into the corresponding second protective strip 8, enhancing the strength of the second protective strip 8 in supporting the insulation 9, thereby reducing the probability of the optical fiber 1 being damaged by pressure and improving the safety of the optical cable during use. During the process of the first protective strip 7 being compressed and the second protective strip 8 expanding, all the first protective strips 7 and all the second protective strips 8 are staggered and distributed. All the first protective strips 7 and all the second protective strips 8 together form a wave-shaped structure to support all segments inside the insulation 9.

[0033] Example 3

[0034] Based on Example 2, such as Figures 3-6 As shown, a plurality of first elastic pieces 10 and a plurality of second elastic pieces 11 are spaced apart within the first protective strip 7. The first elastic pieces 10 and the second elastic pieces 11 located at the front and rear edges of the first protective strip 7 are both fixedly connected to the first protective strip 7. Both the first elastic pieces 10 and the second elastic pieces 11 are arc-shaped, with the middle part of the first elastic piece 10 curving upward and the middle part of the second elastic piece 11 curving downward. All the first elastic pieces 10 and all the second elastic pieces 11 within the same first protective strip 7 are spaced apart. The first elastic piece 10 is fixedly connected to the adjacent second elastic piece 11. A slot 12 is provided on the opposite side of the first elastic piece 10 and the adjacent second elastic piece 11. A plurality of cards 13 are fixedly connected to the first protective strip 7. The number of cards 13 is the same as the number of slots 12. The cards 13 are used to limit the movement of adjacent slots 12.

[0035] When winding up the optical cable, if the front end of the optical cable bends upward, the first elastic sheet 10 bends around the corresponding slot 12; if the front end of the optical cable bends downward, the second elastic sheet 11 bends around the corresponding slot 12. The slot 12 is supported by the card 13, which buffers the bending of the first elastic sheet 10 and the second elastic sheet 11, thereby enhancing the bending strength of the optical cable and improving the safety of the optical cable during use.

[0036] When the optical cable is under tension, the first extrusion member 3 and the corresponding second extrusion member 4 on the side away from the adjacent extrusion sleeve 5 move in opposite directions. The first elastic sheet 10 and the second elastic sheet 11 are stretched and deformed. The card 13 limits the adjacent card slot 12 to buffer the stretching of the first elastic sheet 10 and the second elastic sheet 11, thereby enhancing the tensile strength of the optical cable and improving the safety of the optical cable during use.

[0037] When the optical cable is under pressure, the card 13 supports the first protective strip 7. Then, the card 13 moves and squeezes the adjacent first elastic sheet 10 and the adjacent second elastic sheet 11 to deform, so that the card 13 moves and tends to disengage from the corresponding card slot 12. This buffers the deformation of the card 13 and the first protective strip 7 under pressure, thereby enhancing the compressive strength of the optical cable and improving the safety of the optical cable during use.

[0038] Example 4

[0039] Based on Example 3, such as Figures 1-6 As shown, a processing method for a combined butterfly optical cable, based on the aforementioned combined butterfly optical cable, includes the following specific steps:

[0040] S1: The first extrusion piece 3, the second extrusion piece 4, the extrusion sleeve 5 and the extrusion block 6 are pre-assembled so that the first extrusion piece 3 and the second extrusion piece 4 slide relative to each other and clamp the extrusion sleeve 5.

[0041] S2: The optical fiber 1 is continuously bent using a periodic bending device, and several support sleeves 2 are intermittently wrapped around different peaks of the optical fiber 1.

[0042] S3: Wrap the second protective strip 8 around the optical fiber 1, alternately set the support sleeve 2 and the second protective strip 8, install several alternately distributed first elastic pieces 10 and several second elastic pieces 11 inside the first protective strip 7, fix the card 13 inserted into the card slot 12 on the first protective strip 7, connect the first protective strip 7 to the corresponding second protective strip 8, and seal the first protective strip 7 and the second protective strip 8 with air injection.

[0043] S4: Secure the assembled first extrusion piece 3 and second extrusion piece 4 between the two first protective strips 7, so that the extrusion block 6 is close to the corresponding support sleeve 2;

[0044] S5: The optical fiber 1, which is equipped with the support sleeve 2, the first extrusion piece 3, the second extrusion piece 4, the extrusion sleeve 5, the extrusion block 6, the first protective strip 7 and the second protective strip 8, is placed into the optical cable extrusion mold, and an insulating layer 9 is wrapped on the outside by the extruder.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A combined butterfly-shaped optical cable, characterized in that, The optical fiber (1) is wavy and is fitted with several support sleeves (2) spaced apart. Several first extrusion members (3) are provided on both sides of the optical fiber (1) spaced apart. The number of first extrusion members (3) is the same as the number of support sleeves (2). The first extrusion members (3) are slidably connected to second extrusion members (4). An extrusion sleeve (5) is fixed between the first extrusion member (3) and the corresponding second extrusion member (4). An extrusion block (6) is fixed to the extrusion sleeve (5). The extrusion block (6) is used to extrude the corresponding support sleeve (2). The optical fiber (1) is provided with an insulating skin (9). The support sleeve (2), the first extrusion member (3) and the second extrusion member (4) are all fixed to the insulating skin (9). A first protective strip (7) is fixed between the first extrusion member (3) and the second extrusion member (4) on the side away from the corresponding extrusion sleeve (5), and a second protective strip (8) is fixed between two adjacent support sleeves (2). All the second protective strips (8) together wrap the optical fiber (1). The first protective strip (7) and the second protective strip (8) are both located inside the insulating skin (9). The elastic coefficient of the first protective strip (7) is greater than that of the second protective strip (8); Both the first protective strip (7) and the second protective strip (8) are airbag structures, and the first protective strip (7) is connected to the corresponding second protective strip (8); All the first protective strips (7) and all the second protective strips (8) are staggered.

2. The combined butterfly optical cable according to claim 1, characterized in that, The first protective strip (7) is provided with a plurality of first elastic pieces (10) and a plurality of second elastic pieces (11) spaced apart. The first elastic pieces (10) and the second elastic pieces (11) located at the edge of the first protective strip (7) are fixed to the first protective strip (7). All the first elastic pieces (10) and all the second elastic pieces (11) in the same first protective strip (7) are spaced apart. The first elastic piece (10) is fixed to the adjacent second elastic piece (11).

3. A combined butterfly optical cable according to claim 2, characterized in that, The first elastic sheet (10) and the adjacent second elastic sheet (11) are provided with slots (12) on opposite sides.

4. A combined butterfly optical cable according to claim 3, characterized in that, The first protective strip (7) is fixed with a number of cards (13), the number of cards (13) is the same as the number of card slots (12), and the cards (13) are used to limit the adjacent card slots (12).

5. A combined butterfly optical cable according to claim 4, characterized in that, The first elastic sheet (10) and the second elastic sheet (11) are both arc-shaped, and the card (13) is inclined.

6. A method for processing a combined butterfly optical cable, based on the combined butterfly optical cable according to claim 5, characterized in that, The specific steps are as follows: S1: The first extruder (3), the second extruder (4), the extrusion sleeve (5) and the extrusion block (6) are pre-assembled so that the first extruder (3) and the second extruder (4) slide against each other and clamp the extrusion sleeve (5). S2: The optical fiber (1) is continuously bent by a periodic bending device, and several support sleeves (2) are intermittently wrapped around different peaks of the optical fiber (1). S3: Wrap the second protective strip (8) around the optical fiber (1), alternately set the support sleeve (2) and the second protective strip (8), install several alternately distributed first elastic pieces (10) and several second elastic pieces (11) inside the first protective strip (7), fix the card (13) inserted into the card slot (12) on the first protective strip (7), connect the first protective strip (7) to the corresponding second protective strip (8), and perform air injection and sealing on the first protective strip (7) and the second protective strip (8); S4: Fix the assembled first extrusion piece (3) and second extrusion piece (4) between the two first protective strips (7) so that the extrusion block (6) is close to the corresponding support sleeve (2). S5: The optical fiber (1) that has been assembled with support sleeve (2), first extrusion piece (3), second extrusion piece (4), extrusion sleeve (5), extrusion block (6), first protective strip (7) and second protective strip (8) is placed into the optical cable extrusion mold and covered with an insulating layer (9) by an extruder.

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