Temperature-resistant environment-friendly outdoor optical cable

Abstract

The utility model relates to a temperature-resistant environment-friendly outdoor optical cable, which comprises an optical cable, an outer sheath made of polyethylene materials, a central reinforcing core and a sleeve. Wherein the sleeve is internally provided with at least two optical fibers, and water-blocking filling is arranged between the optical fibers and the sleeve; the temperature-resistant cushion layer of the optical cable is provided by selecting the foamed polypropylene material, and the characteristic of low thermal conductivity of the foamed polypropylene material is utilized, so that a heat insulation effect is ensured when the temperature of the surface layer of the optical cable changes drastically, and the optical fiber is not influenced by obvious temperature difference. And meanwhile, the foamed polypropylene material has excellent compression resistance and energy absorption performance and good toughness, so that when the optical cable is extruded by external force for a short time, the force is buffered to a certain extent, and the safety and stability of optical fiber signal transmission are ensured. And the foamed polypropylene material is a heat-property recoverable material, so that the low-carbon and environment-friendly requirements are fully met.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical cables and relates to a temperature-resistant and environment-friendly outdoor optical cable. Background Art

[0002] With the development of information technology, the popularization and application of computer network technology has become an indispensable part of today's society. Compared with traditional electrical communication technology, optical communication technology has wider transmission bandwidth, lower transmission loss, lower cost and higher fidelity, which makes the popularity of optical communication continue to increase. Nowadays, optical cable has gradually become the main transmission medium in the field of modern communications.

[0003] Optical cable transmission mainly uses optical fiber as the transmission medium. During the signal transmission process, optical fiber is significantly affected by temperature and force. This is mainly manifested in that the higher the temperature, the greater the optical fiber attenuation, and the greater the stress on the optical fiber, the greater the optical fiber attenuation.

[0004] The widest temperature range of traditional outdoor optical cables is -40℃ to 75℃. To ensure the life of the cables, the sheath material of outdoor optical cables generally uses a black sheath containing carbon black to meet the anti-ultraviolet light aging characteristics. In fact, due to the heat absorption effect of black, the surface temperature of the black sheath of outdoor optical cables rises very quickly under the sun in summer, and can reach the critical temperature in a very short time. In addition to the rapid temperature rise, depending on the different cable laying scenarios, there is also a situation where contact with liquid water at high temperature causes rapid cooling.

[0005] Long-term high-temperature operation or short-term significant temperature difference will cause different thermal expansion coefficients of the materials in each layer of the optical cable, resulting in relative displacement deformation. In particular, the deformation of the casing material will cause the optical fiber to slip inside the tube. When the casing deformation rate is too fast, the optical fiber response slip speed will accelerate, indirectly causing the optical fiber to receive increased resistance from the fiber paste inside the tube, thereby increasing the force attenuation of the optical fiber and affecting signal transmission. Long-term excessive temperature difference cycles will also cause deformation fatigue of the optical fiber reciprocating motion, reducing the service life of the optical cable.

[0006] To sum up, developing a temperature-resistant optical cable can effectively ensure the safety of communication transmission and extend the service life of the optical cable. It not only reduces costs and enhances communication safety, but also uses recyclable materials to meet the needs of green and environmental protection development. Utility Model Content

[0007] The purpose of the utility model is to provide a temperature-resistant and environment-friendly outdoor optical cable, which can solve the problems raised in the background technology.

[0008] According to the technical solution provided by the utility model: a temperature-resistant and environmentally friendly outdoor optical cable includes an optical cable, an outer sheath made of polyethylene material, and a central reinforcing core and a casing;

[0009] There are at least two optical fibers in the sleeve, and there is water-blocking filling between the optical fibers and the sleeve.

[0010] Preferably, a temperature-resistant cushion layer is provided inside the outer sheath, and a water-blocking filling is provided between the temperature-resistant cushion layer and the casing.

[0011] Preferably, at least two filling ropes are further provided in the outer sheath, and the outer sides of the filling ropes are still wrapped by the water-blocking filler and are opposite to the position of the sleeve.

[0012] Preferably, the optical fiber is a multimode optical fiber.

[0013] Preferably, the sleeve is made of polybutylene terephthalate (PBT) material.

[0014] Preferably, the filling rope is made of polypropylene resin (PP) material.

[0015] Preferably, the reinforcing core is made of high-carbon phosphating steel wire material.

[0016] Preferably, the water-blocking filler is made of a water-blocking cable paste material.

[0017] Preferably, the temperature-resistant cushion layer is made of foamed polypropylene material.

[0018] Preferably, the outer sheath is made of polyethylene material.

[0019] The positive effects of this application are:

[0020] The utility model provides a heat-resistant and environmentally friendly outdoor optical cable, which has the following advantages:

[0021] 1. By selecting foamed polypropylene material to provide a heat-resistant cushion layer for the optical cable, and taking advantage of the low thermal conductivity of the foamed polypropylene material, it can be used to insulate the optical cable when the surface temperature changes drastically, so that the optical fiber will not be significantly affected by the temperature difference. At the same time, because the foamed polypropylene material has excellent compressive energy absorption performance and good toughness, when the optical cable is squeezed by external force for a short time, it can buffer the force to a certain extent, ensuring the safety and stability of the optical fiber signal transmission. In addition, the foamed polypropylene material is a thermoplastic recyclable material, which fully realizes the low-carbon green environmental protection needs.

[0022] The foamed polypropylene material has the disadvantage of being not resistant to friction, so a thin polyethylene sheath is extruded on the outermost layer of the optical cable, which not only serves to prevent mechanical friction of the optical cable during the laying process, but the low water absorption of the polyethylene material itself also indirectly ensures the waterproof ability of the optical cable.

[0023] The optical cable of the utility model is suitable for environments with complex conditions, exposure to direct sunlight and intermittent contact with water, or large temperature difference between day and night, such as open-air monitoring of river banks, solar panel signal collection, intelligent irrigation control of farmland, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model.

[0025] In the figure: optical fiber 1; casing 2; filling rope 3; reinforcing core 4; water-blocking filling 5; temperature-resistant cushion layer 6; outer sheath 7. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the utility model, the following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0028] like Figure 1 As shown, the utility model is a temperature-resistant and environmentally friendly outdoor optical cable, comprising

[0029] The optical cable has an outer sheath 7 made of polyethylene material, and has a central reinforcing core 4 and a sleeve 2; the sleeve 2 is made of polybutylene terephthalate (PBT) material; the reinforcing core 4 is made of high-carbon phosphating steel wire material;

[0030] Among them, there are at least two optical fibers 1 in the sleeve 2, the optical fibers 1 are multimode optical fibers, the optical fibers 1 are bundled after being colored and cured, and there is a water-blocking filling 5 between the optical fibers 1 and the sleeve 2; the number of sleeves 2 is determined according to the amount of optical fibers 1 used, generally 1-6; the number of filling ropes 4 and the number of sleeves 2 is 6 or (1-5). When there are 6 sleeves, the filling rope 3 may not be included in the optical cable structure.

[0031] The optical fiber 1 and the sleeve 2 form an optical unit to ensure the basic communication requirements of the optical cable, while the filling rope 3 provides the filling roundness of the entire optical cable.

[0032] The water-blocking filler 5 is made of a water-blocking cable paste material, and the water-blocking filler 5 ensures that the optical cable has a water-blocking function along its entire longitudinal length, thereby preventing water from entering the optical cable head end connection or rainwater from seeping in after accidental damage caused by external forces in the middle.

[0033] The temperature-resistant cushion layer 6 is made of foamed polypropylene material, and the temperature-resistant cushion layer 6 provides heat insulation and heat preservation, and provides pressure resistance and buffering.

[0034] The outer sheath 7 provides surface wear protection for the optical cable.

[0035] A heat-resistant cushion layer 6 is arranged inside the outer sheath 7 , and a water-blocking filler 5 is arranged between the heat-resistant cushion layer 6 and the casing 2 .

[0036] Preferably, at least two filling ropes 3 are further provided in the outer sheath 7, and the filling ropes 3 are made of polypropylene resin (PP) material. The outer side of the filling rope 3 is still wrapped with the water-blocking filling 5 and is opposite to the position of the casing 2; after the casing 2 and the filling rope 3 are wrapped around the reinforcing core 4 to form a whole, the water-blocking filling 5 is coated on the surface gap, and then the heat-resistant cushion layer 6 is extruded, and finally the outer sheath 7 is extruded outside the heat-resistant cushion layer 6.

[0037] By selecting foamed polypropylene material to provide the optical cable heat-resistant cushion layer 6, the low thermal conductivity of the foamed polypropylene material is used to ensure that it plays a role in heat insulation when the temperature of the optical cable surface changes drastically, so that the optical fiber will not be significantly affected by the temperature difference. At the same time, because the foamed polypropylene material has excellent compressive energy absorption performance and good toughness, when the optical cable is squeezed by external force for a short time, it has a certain buffering effect on the force, ensuring the safety and stability of optical fiber signal transmission. In addition, the foamed polypropylene material is a thermally recyclable material, which fully meets the low-carbon green environmental protection needs.

[0038] The foamed polypropylene material has the disadvantage of being not resistant to friction, so a polyethylene sheath is extruded on the outermost layer of the optical cable. This not only protects the optical cable from mechanical friction during the laying process, but the low water absorption of the polyethylene material itself also indirectly ensures the waterproof ability of the optical cable.

[0039] The optical cable of the utility model is suitable for environments with complex conditions, exposure to direct sunlight and intermittent contact with water, or large temperature difference between day and night, such as open-air monitoring of river banks, solar panel signal collection, intelligent irrigation control of farmland, etc.

[0040] The optical fiber 1 is a G652 multimode optical fiber with an 8-core per tube structure; the casing 2 is a loose casing with a wall thickness of 0.3mm and a diameter of 2.0mm, made of PBT material, and multiple casings are distinguished by color; the filling rope 3 is a polypropylene resin strip with a diameter of 2.0mm; the reinforcing core 4 is a high-carbon phosphating steel wire with a diameter of 2.1mm; the water-blocking filling 5 is tied with water-blocking yarn and then coated with water-blocking cable paste; the heat-resistant cushion layer 6 is made of extruded foamed polypropylene material with a nominal thickness of 1.2mm; the outer sheath 7 is made of polyethylene sheath material with a nominal thickness of 0.4mm.

[0041] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A temperature-resistant and environmentally friendly outdoor optical cable, characterized in that: include An optical cable having an outer sheath (7) made of polyethylene material and having a central reinforcing core (4) and a sleeve (2); There are at least two optical fibers (1) in the sleeve (2), and a water-blocking filler (5) is provided between the optical fibers (1) and the sleeve (2); A heat-resistant cushion layer (6) is provided inside the outer sheath (7), and a water-blocking filler (5) is provided between the heat-resistant cushion layer (6) and the casing (2); The temperature-resistant cushion layer (6) is made of foamed polypropylene material.

2. A temperature-resistant and environmentally friendly outdoor optical cable as claimed in claim 1, characterized in that: At least two filling ropes (3) are also arranged inside the outer sheath (7), and the outer sides of the filling ropes (3) are still wrapped by the water-blocking filler (5) and are located opposite to the sleeve (2).

3. A temperature-resistant and environmentally friendly outdoor optical cable as claimed in claim 1, characterized in that: The optical fiber (1) is a multimode optical fiber.

4. A temperature-resistant and environmentally friendly outdoor optical cable as claimed in claim 1, characterized in that: The sleeve (2) is made of polybutylene terephthalate material.

5. A temperature-resistant and environmentally friendly outdoor optical cable as claimed in claim 2, characterized in that: The filling rope (3) is made of polypropylene resin (PP) material.

6. A temperature-resistant and environmentally friendly outdoor optical cable as claimed in claim 1, characterized in that: The reinforcing core (4) is made of high-carbon phosphating steel wire material.

7. A temperature-resistant and environmentally friendly outdoor optical cable as claimed in claim 1, characterized in that: The water-blocking filler (5) is made of water-blocking cable paste material.

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