A type of composite optical cable with mother and daughter sleeve

Abstract

This invention relates to the field of composite optical cable technology, and more particularly to a mother-daughter sleeve type composite optical cable, comprising: a reinforcing member; a cable unit located on the outer periphery of the reinforcing member; an optical cable unit located on the outer periphery of the reinforcing member and abutting the cable unit; a second filler member abutting the cable unit and / or the optical cable unit; an armor layer sleeved on the outer periphery of the reinforcing member, the cable unit, the optical cable unit, and the second filler member; and a protective layer sleeved on the outer periphery of the armor layer. The composite optical cable provided by this application can increase the number of optical fibers, avoid uneven tension leading to excessive local stress on the optical fibers, and improve the transmission effect and service life of optical signals.

Description

Technical Field

[0001] This invention relates to the field of composite optical cable technology, and more particularly to a mother-daughter sleeve type composite optical cable. Background Technology

[0002] With the continuous development of emerging technologies such as 5G, IoT, and smart cities, the demand for communication and power transmission is increasing. Traditional cable transmission cannot meet these requirements, while optoelectronic composite cables, due to their advantages such as high speed, large bandwidth, and low attenuation, have become the most effective transmission method currently available. Optoelectronic composite cables integrate the functions of optical fibers and cables, and can transmit optical and electrical signals simultaneously, making them suitable for various communication and power transmission scenarios. Currently, existing optoelectronic composite cables mainly suffer from the following technical problems: First, the number of optical fibers that can be accommodated is limited by using only a single loose tube; second, when setting different numbers of optical fiber units and cable units as needed, multiple filler ropes are required to fill the gaps between the optical fiber units and cable units to maintain the circular cross-section of the composite cable. Furthermore, the number and size of the filler ropes must be adapted to the changes in the number of optical fiber units and cable units, making the operation complex and cumbersome. Twisting the optical fiber units, cable units, and multiple filler ropes together is difficult, and uneven tension can lead to excessive local stress on the optical fibers, affecting the transmission effect of optical signals and reducing service life. Summary of the Invention

[0003] This invention provides a mother-daughter sleeve type composite optical cable to solve the problems of how to increase the number of optical fibers and how to easily adapt the number and size of filler ropes, avoid uneven tension causing excessive local stress on the optical fibers, and improve the transmission effect and service life of optical signals.

[0004] This invention provides a female-female sleeve type composite optical cable, comprising:

[0005] Reinforcing components;

[0006] The cable unit is located on the outer periphery of the reinforcing member;

[0007] The optical fiber unit is located on the outer periphery of the reinforcing member and abuts against the cable unit;

[0008] The second filler abuts against the cable unit and / or the optical cable unit;

[0009] An armor layer is fitted around the outer periphery of the reinforcing member, the cable unit, the optical fiber unit, and the second filler.

[0010] A protective layer is fitted around the outer periphery of the armor layer.

[0011] In some embodiments, the optical cable unit includes:

[0012] optical fiber;

[0013] A pine sleeve is fitted around the outer periphery of the optical fiber and filled with fiber grease; at least one such sleeve is used.

[0014] The female loose sleeve is fitted around the outer periphery of the female loose sleeve.

[0015] In some embodiments, the cable unit includes:

[0016] Conductor;

[0017] An insulating sheath is fitted around the outer periphery of the conductor.

[0018] In some embodiments, the armor layer is a corrugated steel strip.

[0019] In some embodiments, the protective layer is made of medium-density polyethylene or low-smoke halogen-free polyolefin.

[0020] In some embodiments, the number of both the cable unit and the optical fiber unit is at least one.

[0021] In some embodiments, the second filler is an inflatable sleeve that is fitted around the outer periphery of the cable unit and the optical fiber unit.

[0022] In some embodiments, the inflatable sleeve includes a plurality of triangular inflatable parts connected in sequence, and a sealing diaphragm is provided at the connection between each pair of adjacent triangular inflatable parts.

[0023] In some embodiments, it also includes:

[0024] A first filler, located on the outer periphery of the reinforcing member, abuts against the cable unit and / or the optical fiber unit.

[0025] In some embodiments, the first filler is an air bladder, which includes a plurality of circular inflatable parts connected in sequence, and a sealing diaphragm is provided at the connection between each pair of adjacent circular inflatable parts.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. The male-female sleeve-type composite optical cable of the present invention provides a high-efficiency, reliable, easy-to-install and maintain transmission line solution that combines the advantages of optical fiber and cable to meet diverse communication and power transmission needs;

[0028] 2. By setting up a female loose tube and a female loose tube, this invention increases the number of optical fibers that can be accommodated. On the other hand, it provides double protection for the optical fibers, avoiding damage such as microcracks and breaks caused by the stranding force and mechanical forces such as friction and compression from adjacent cable units and the second filler, thereby improving the reliability of the optical fibers.

[0029] 3. The second filler provided by the present invention is designed as an inflatable sleeve, comprising multiple sequentially connected triangular inflatable parts, with a sealing diaphragm between adjacent triangular inflatable parts. Firstly, the triangular structure better adapts to gaps, providing better filling and support effects. Secondly, the second filler is an integral structure with good overall stability. During use, it is directly sleeved onto the outer periphery of the twisted cable unit and optical cable unit, resulting in good tension uniformity, simple and convenient operation, buffering and protecting the optical fiber, improving signal transmission performance, extending service life, and facilitating subsequent armoring. Thirdly, the sealing diaphragm facilitates control of the number of inflatable triangular parts. According to actual usage needs, an appropriate number of triangular inflatable parts are filled, and inflation is controlled, making operation simple and convenient.

[0030] 4. The first filling component provided by the present invention is designed as an inflatable bladder, which consists of multiple circular inflatable parts connected in sequence. A sealing diaphragm is provided between adjacent circular inflatable parts. Firstly, the circular inflatable parts can abut against the cable unit and / or optical cable unit, better filling the fitting gaps and providing better filling and support effects. Secondly, the multiple circular inflatable parts are an integrated structure with good overall stability. During use, they are directly twisted together with the cable unit and optical cable unit, resulting in good tension uniformity, simple and convenient operation, buffer protection for the optical fiber, improved signal transmission effect, extended service life, and facilitate subsequent armoring. Thirdly, by setting the sealing diaphragm, it is easy to control the number of inflatable parts. According to actual use needs, an appropriate number of circular inflatable parts can be filled, and inflation can be controlled, making operation simple and convenient. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a specific embodiment of the male-female sleeve type composite optical cable of the present invention;

[0032] Figure 2 This is a schematic diagram of another specific embodiment of the male-female sleeve type composite optical cable of the present invention;

[0033] Figure 3 yes Figure 1 The diagram shows a specific embodiment of the second filler element in a mother-daughter sleeve type composite optical cable.

[0034] Figure 4 yes Figure 1 The diagram shows a specific embodiment of the first filler element in a mother-daughter sleeve type composite optical cable.

[0035] In the attached diagram, 1 is the reinforcing member; 2 is the cable unit; 21 is the conductor; 22 is the insulation sheath; 3 is the optical cable unit; 31 is the optical fiber; 32 is the female loose tube; 33 is the female loose tube; 4 is the second filler; 41 is the air-filled sleeve; 42 is the triangular air-filled part; 43 is the sealing diaphragm; 44 is the filler rope; 5 is the armor layer; 6 is the protective layer; 7 is the first filler; 71 is the air bladder; and 72 is the circular air-filled part. Detailed Implementation

[0036] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] As described in the background section, traditional composite optical cables use only a single loose tube to house the optical fibers, limiting the number of fibers they can accommodate. Furthermore, when setting different numbers of fiber and cable units, multiple filler ropes are needed to fill the gaps between the fiber and cable units to maintain a circular cross-section of the composite cable. The number and size of the filler ropes must also be adapted to the varying numbers of fiber and cable units, making the operation complex and cumbersome. Twisting the fiber, cable, and filler ropes together is difficult, leading to uneven tension and excessive localized stress on the optical fibers, affecting optical signal transmission and reducing lifespan. Therefore, how to increase the number of optical fibers, easily adapt the number and size of filler ropes, avoid uneven tension causing excessive localized stress on the optical fibers, and improve optical signal transmission and lifespan has become a pressing technical problem for those skilled in the art.

[0038] To solve the above problems, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 This invention provides a composite optical cable with a mother-daughter sheath, comprising: a reinforcing member 1, a cable unit 2, an optical cable unit 3, a second filler 4, an armor layer 5, and a protective layer 6. The reinforcing member 1 is located at the center of the composite optical cable. Both the cable unit 2 and the optical cable unit 3 abut against the outer periphery of the reinforcing member 1 and against each other. That is, there are at least one cable unit 2 and one optical cable unit 3, and adjacent cable units 2 and / or optical cable units 3 abut against each other. The second filler 4 is located in the gap outside the cable unit 2 and / or optical cable unit 3, and abuts against the cable unit 2 and / or optical cable unit 3, thereby filling the gap outside the cable unit 2 and / or optical cable unit 3. The armor layer 5 is sleeved on the outer periphery of the reinforcing member 1, the cable unit 2, the optical cable unit 3, and the second filler 4, and the protective layer 6 is sleeved on the outer periphery of the armor layer 5.

[0039] The present invention provides a high-efficiency, reliable, easy-to-install and maintain transmission line solution for the female-female sleeve composite optical cable, which combines the advantages of optical fiber and cable to meet diverse communication and power transmission needs.

[0040] Preferably, the reinforcing member 1 is phosphated steel wire or FRP, where FRP is fiber-reinforced plastic.

[0041] Preferably, the optical cable unit 3 includes: an optical fiber 31, a sub-loose tube 32, and a female loose tube 33. The sub-loose tube 32 is sleeved on the outer periphery of the optical fiber 31 and filled with fiber grease. That is, fiber grease is filled between the optical fibers 31. There are multiple sub-loose tubes 32, and the female loose tube 33 is sleeved on the outer periphery of multiple sub-loose tubes 32. By setting the female loose tube 33 and the sub-loose tubes 32, on the one hand, the number of optical fibers 31 that can be accommodated is increased; on the other hand, the optical fibers 31 are protected twice, avoiding damage such as microcracks and breaks caused by the stranding force and the mechanical forces such as friction and compression from adjacent cable units 2 and the second filler 4, thereby improving the reliability of the optical fiber 31.

[0042] Preferably, the female loose tube 33 has a larger diameter and greater strength, and is made of PBT (polybutylene terephthalate) with a wall thickness of 0.5-1.2 mm. The female loose tube 32 has a smaller diameter, is also made of PBT, and has a wall thickness of 0.2-0.3 mm. Each female loose tube 32 contains 4-12 optical fibers 31, which are single-mode or multimode optical fibers.

[0043] Preferably, the cable unit 2 includes: a conductor 21 and an insulating sheath 22 sleeved around the conductor 21. The insulating sheath 22 has different colors and is made of PVC material, i.e., polyvinyl chloride material, and the thickness of the insulating sheath 22 is 0.6-1.0 mm.

[0044] Preferably, the outer diameter of the cable unit 2 and the optical cable unit 3 are the same, that is, the outer diameter of the female loose sleeve 33 and the insulation sheath 22 are the same.

[0045] Preferably, the armor layer 5 is a corrugated steel strip.

[0046] Preferably, the protective layer 6 is made of medium-density polyethylene or low-smoke halogen-free polyolefin.

[0047] Preferably, the number of cable unit 2 and optical fiber unit 3 is at least one. The number of cable unit 2 and optical fiber unit 3 can be adjusted according to actual needs.

[0048] Preferably, the second filler 4 can be a PP filler rope 44, where PP is polypropylene. The second filler 4 can also be an inflatable sleeve 41, fitted around the outer periphery of the cable unit 2 and the optical cable unit 3.

[0049] Preferably, the inflatable sleeve 41 includes a plurality of sequentially connected triangular inflatable portions 42, with a sealing diaphragm 43 provided between adjacent triangular inflatable portions 42. The plurality of sequentially connected triangular inflatable portions 42 are defined as a first inflatable portion, a second inflatable portion, a third inflatable portion, etc. The first inflatable portion has an inflation port at its top or bottom.

[0050] In practice, the inflation sleeve 41 is fitted around the outside of the twisted cable unit 2 and optical cable unit 3. Gas is introduced into the inflation port of the first inflation part. After the first inflation part is filled with gas and bulges, it becomes triangular, filling the gap formed by two adjacent cable units 2, two adjacent optical cable units 3, or the outer side of two adjacent cable units 2 and optical cable units 3. When it is necessary to fill the second inflation part, gas is continued to be introduced into the inflation port of the first inflation part. When the gas pressure in the first inflation part is greater than the bearing limit of the sealing diaphragm 43, the sealing diaphragm 43 is forced to rupture instantaneously. Gas enters the second inflation part from the first inflation part through the ruptured sealing diaphragm 43. When the third inflation part is needed, the operation is repeated in the above manner.

[0051] It should be noted that when uninflated, the inflation sleeve 41 is in a deflated state, exhibiting flexibility and adaptability. That is, when uninflated, each triangular inflation section 42 is in a deflated state, possessing flexibility and adaptability, and does not require space. In practical implementation, the triangular inflation sections 42 can be inflated according to the actual required quantity. Unused triangular inflation sections 42 are left uninflated, as they occupy no space and simply need to be attached between the cable unit 2 and the armor layer 5, or between the optical cable unit 3 and the armor layer 5. In actual use, the number of triangular inflation sections 42 can be equal to or greater than the actual required quantity.

[0052] The second filler 4 provided by the present invention is designed as an inflatable sleeve 41. The inflatable sleeve 41 includes a plurality of triangular inflatable portions 42 connected in sequence, and a sealing diaphragm 43 is provided between adjacent triangular inflatable portions 42. Firstly, the triangular inflatable portions 42 can fill the gaps formed by two adjacent cable units 2 and the armor layer 5, or the gaps formed by two adjacent optical cable units 3 and the armor layer 5, or the gaps formed by two adjacent cable units 2, optical cable units 3 and the armor layer 5. The triangular structure can better adapt to the gaps and provide better filling and support effects. Secondly, compared with the prior art using multiple independent filling ropes, the present invention provides better filling and support effects. The previous method involved twisting multiple filler ropes together with the cable unit 2 and the optical cable unit 3, which resulted in cumbersome operation, difficulty, and uneven tension. The second filler 4 of this application is an integrated structure with good overall stability. When in use, it is directly sleeved on the outer periphery of the twisted cable unit 2 and optical cable unit 3, resulting in good tension uniformity and simple and convenient operation. It also provides buffer protection for the optical fiber, improves signal transmission effect, extends service life, and facilitates subsequent armoring. Thirdly, by setting a sealing diaphragm 43, it is easy to control the inflation quantity of the triangular inflation part 42. According to the actual use needs, an appropriate number of triangular inflation parts 42 are filled, and inflation can be controlled, making the operation simple and convenient.

[0053] Preferably, the composite optical cable with a female-female sleeve further includes: a first filler 7 located on the outer periphery of the reinforcing member 1, abutting against the cable unit 2 and / or the optical cable unit 3. The first filler 7 is twisted together with the cable unit 2 and the optical cable unit 3, so that the composite cable maintains a circular cross-section.

[0054] Preferably, the first filling element 7 is an air bladder 71, which is a plurality of sequentially connected circular inflatable parts 72, with a sealing diaphragm 43 provided between adjacent circular inflatable parts 72. The plurality of sequentially connected circular inflatable parts 72 are defined as a first circular inflatable part, a second circular inflatable part, a third circular inflatable part, etc. The first circular inflatable part has an inflation port at its top or bottom.

[0055] In practice, air is injected into the air inlet of the first circular inflation part, causing the first circular inflation part to bulge into a circle. Inflation continues until the air pressure inside the first circular inflation part exceeds the bearing limit of the sealing diaphragm 43, forcing the sealing diaphragm 43 to rupture instantaneously. Gas then enters the second circular inflation part from the first circular inflation part through the ruptured sealing diaphragm 43. When the third circular inflation part needs to be used, the operation can be repeated in the above manner.

[0056] It should be noted that the outer diameter of the circular inflation part 72 is the same as the outer diameter of the cable unit 2 and the optical cable unit 3. The number of circular inflation parts 72 can be greater than or equal to the actual required number. The actual required number of circular inflation parts 72 is determined based on the number of cable units 2 and optical cable units 3. The cable units 2, and / or the optical cable units 3, and / or the cable units 2 and optical cable units 3 are in contact with each other. Any remaining space needs to be filled with circular inflation parts 72. After inflation, the circular inflation parts 72 abut against the cable units 2 and / or the optical cable units 3, thus ensuring that the cross-section of the composite optical cable is circular. For example, when the total number of cable units 2 and optical cable units 3 is 3, one circular inflation part 72 is required. When multiple circular inflation parts 72 are needed, the inflation quantity of the circular inflation parts 72 can be controlled simply by inflation, making the operation simple and convenient.

[0057] The first filling component 7 provided by this invention is designed as an inflatable bladder 71, which consists of multiple sequentially connected circular inflatable parts 72. A sealing diaphragm 43 is provided between adjacent circular inflatable parts 72. Firstly, the circular inflatable parts 72 can abut against the cable unit 2 and / or optical cable unit 3, better filling and adapting gaps and providing better filling and support effects. Secondly, compared to the prior art using multiple independent filling ropes, which are twisted together with the cable unit 2 and optical cable unit 3, resulting in cumbersome operation and uneven tension, the multiple circular inflatable parts 72 of this application are an integrated structure with good overall stability. During use, they are directly twisted together with the cable unit 2 and optical cable unit 3, resulting in good tension uniformity, simple and convenient operation, buffer protection for the optical fiber, improved signal transmission effect, extended service life, and facilitate subsequent armoring. Thirdly, by setting the sealing diaphragm 43, it is easy to control the number of inflatable parts 72. According to actual usage needs, an appropriate number of circular inflatable parts 72 are filled, and inflation is controlled, making operation simple and convenient.

[0058] Preferably, both the first filler 7 and the second filler 4 are filled with inert gas. The inert gas is nitrogen, helium, or argon. Inert gas has a certain degree of compressibility and can act as a buffer when the composite optical cable is subjected to external pressure or temperature changes. Especially when the optical cable is compressed, the inert gas can absorb and disperse the pressure to a certain extent, reducing the direct force on the optical fiber and preventing damage such as breakage or micro-cracks due to stress, thus protecting the physical and transmission performance of the optical fiber.

[0059] It is worth noting that in the prior art, composite optical cables need to adapt the number and size of the filling rope according to the changes in the number of optical fiber units and cable units. This application only needs to control the number of air in the triangular inflation part 42 and the circular inflation part 72 to achieve filling adaptation for different numbers of optical fiber units and cable units, which improves the convenience of operation.

[0060] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0062] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0063] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A type of composite optical cable with a mother-daughter sheath, characterized in that, include: Reinforcing components; The cable unit is located on the outer periphery of the reinforcing member; The optical fiber unit is located on the outer periphery of the reinforcing member and abuts against the cable unit; The optical cable unit includes: optical fiber; A pine sleeve is fitted around the outer periphery of the optical fiber and filled with fiber grease; at least one such sleeve is used. The female loose sleeve is fitted around the outer periphery of the female loose sleeve; The second filler abuts against the cable unit and / or the optical cable unit; The second filler is an inflatable sleeve, which is fitted around the outer periphery of the cable unit and the optical cable unit; The inflatable sleeve includes multiple triangular inflatable parts connected in sequence, and a sealing diaphragm is provided at the connection between each pair of adjacent triangular inflatable parts. An armor layer is fitted around the outer periphery of the reinforcing member, the cable unit, the optical fiber unit, and the second filler. A protective layer is fitted around the outer periphery of the armor layer.

2. The composite optical cable with a mother-daughter sheath as described in claim 1, characterized in that, The cable unit includes: Conductor; An insulating sheath is fitted around the outer periphery of the conductor.

3. The composite optical cable with a mother-daughter sleeve according to claim 1, characterized in that, The armor layer is a corrugated steel strip.

4. The composite optical cable with a mother-daughter sheath as described in claim 1, characterized in that, The protective layer is made of medium-density polyethylene or low-smoke halogen-free polyolefin.

5. The composite optical cable with a mother-daughter sheath as described in claim 1, characterized in that, The number of the cable unit and the optical fiber unit is at least one.

6. The composite optical cable with a female-female sleeve according to any one of claims 1-5, characterized in that, Also includes: A first filler, located on the outer periphery of the reinforcing member, abuts against the cable unit and / or the optical fiber unit.

7. The composite optical cable with a mother-daughter sleeve according to claim 6, characterized in that, The first filling element is an air bladder, which includes a plurality of circular inflatable parts connected in sequence, and a sealing diaphragm is provided at the connection between each pair of adjacent circular inflatable parts.

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