CN219417807U - Weather-proof termite-proof optical cable - Google Patents

Abstract

The application relates to a weather-proof termite-proof optical cable, which comprises a cable core and an inner protective layer, a moisture absorption and preservation layer and a nylon termite-proof layer which are sequentially arranged from inside to outside on the outer side of the cable core. The utility model provides a resistant termite-proof optical cable that waits, with nylon setting in the optical cable outermost layer, can prevent gnawing of ant worm, have higher intensity simultaneously, through preventing the in situ moisture absorption layer that moisturizes at nylon, moisture absorption layer has the function of absorption and release moisture, guarantees that nylon material is in the humid state, plays the toughening effect, improves nylon material's weatherability, and moisture absorption layer has the cooling effect simultaneously, can ensure that nylon material avoids the ageing-accelerating destruction that brings by high temperature, improves high temperature resistance.

Description

Weather-proof termite-proof optical cable

Technical Field

The application relates to the technical field of optical cables, in particular to a weather-proof termite-proof optical cable.

Background

Fiber optic cables are manufactured to meet optical, mechanical, or environmental performance specifications by utilizing one or more optical fibers disposed in a covering sheath as a transmission medium and may be used alone or in groups of communication cable assemblies. The basic structure of the optical cable generally consists of a cable core, reinforcing steel wires, fillers, a sheath and other parts, and components such as a waterproof layer, a buffer layer, an insulated metal wire and the like are also arranged according to requirements.

The existing termite-proof optical cable mostly adopts a nylon sheath, and has more remarkable termite-proof performance due to the fact that the nylon is hard and smooth and can resist formic acid secreted by ants. However, when part of the termite-proof optical cable is used outdoors, the termite-proof optical cable can be directly exposed to sunlight, the weather resistance of nylon is poor, the ultraviolet rays in the sunlight can damage the molecular structure of the nylon material, so that the nylon material is aged and cracked, the optical cable material which does not have termite-proof performance is exposed, so that the termite-proof optical cable is invalid, and the aging process of the termite-proof optical cable can be accelerated due to the simultaneous action of high temperature in the environment.

The steel tape armor layer is designed under nylon, so that the nylon cable still has an ant prevention function after aging and cracking, but the optical cable with the structure is heavy in quality, poor in flexibility and has lightning potential safety hazards.

Disclosure of Invention

The embodiment of the application provides a weather-proof termite-proof optical cable, which aims to solve the problems of poor weather resistance and poor high temperature resistance of the weather-proof termite-proof optical cable in the related technology.

The technical scheme provided by the application is as follows:

the application provides a weather-proof termite-proof optical cable, comprising:

the cable core and the inner protection layer, the moisture absorption and preservation layer and the nylon termite-proof layer are sequentially arranged on the outer side of the cable core from inside to outside.

In some embodiments, the moisture absorbing and preserving layer is made of polyacrylic resin, sponge or calcium chloride.

In some embodiments, the moisture absorbing and preserving layer is made of polyacrylic resin, the polyacrylic resin is granule, and the particle size of the polyacrylic resin is 60-80 μm.

In some embodiments, the nylon termite resistant layer is a nylon co-doped with carbon black and titanium white.

In some embodiments, the moisture absorbing and retaining layer has a thickness of 0.5 to 2mm.

In some embodiments, the nylon termite resistant layer has a thickness of 0.5 to 1mm.

In some embodiments, the inner sheath is a plastic inner sheath.

In some embodiments, the inner sheath is made of polyethylene or polyvinyl chloride.

In some embodiments, the cable core is a central tube-type optical cable core, the central tube-type optical cable core comprises a loose tube, the loose tube is sleeved with optical fibers, and the loose tube is filled with fiber paste.

In some embodiments, the cable core is a loose tube layer stranded optical cable core, the loose tube layer stranded optical cable core comprises a central reinforcing member, a loose tube is arranged outside the central reinforcing member Zhou Jiaojie, and the loose tube is sleeved with optical fibers and filled with fiber paste.

The beneficial effects that technical scheme that this application provided brought include: the utility model provides a resistant termite-proof optical cable that waits, with nylon setting in the optical cable outermost layer, can prevent gnawing of ant worm, have higher intensity simultaneously, through preventing the in situ moisture absorption layer that moisturizes at nylon, moisture absorption layer has the function of absorption and release moisture, guarantees that nylon material is in the humid state, plays the toughening effect, improves nylon material's weatherability, and moisture absorption layer has the cooling effect simultaneously, can ensure that nylon material avoids the ageing-accelerating destruction that brings by high temperature, improves high temperature resistance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of a weather-resistant termite-resistant optical cable provided in an embodiment of the present application;

FIG. 2 is a cross-sectional view of a weather-resistant termite-resistant cable provided in an embodiment of the present application;

fig. 3 is a cross-sectional view of a weather-resistant termite-resistant optical cable provided in another embodiment of the present application.

In the figure: 1. a cable core; 2. an inner protective layer; 3. a moisture absorption and retention layer; 4. nylon termite-proof layer.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

As shown in fig. 1, an embodiment of the present application provides a weather-resistant termite-resistant optical cable, including:

the cable core 1 and the inner protection layer 2, the moisture absorption and preservation layer 3 and the nylon termite-proof layer 4 which are sequentially arranged on the outer side of the cable core 1 from inside to outside.

The utility model provides a resistant termite-proof optical cable that waits, with nylon setting in the optical cable outermost layer, can prevent gnawing of ant worm, have higher intensity simultaneously, through preventing the in situ moisture absorption layer that moisturizes at nylon, moisture absorption layer has the function of absorption and release moisture, guarantees that nylon material is in the humid state, plays the toughening effect, improves nylon material's weatherability, and moisture absorption layer has the cooling effect simultaneously, can ensure that nylon material avoids the ageing-accelerating destruction that brings by high temperature, improves high temperature resistance.

Specifically, the inner protective layer 2, the moisture absorption and preservation layer 3 and the nylon termite-proof layer 4 are all designed to be of uniform thickness, and all layers are coaxially and closely arranged, so that the stability is good when being pressed due to the uniform thickness.

In some embodiments, the moisture absorbing and preserving layer 3 is made of polyacrylic resin, sponge or calcium chloride.

The polyacrylic resin, the sponge and the calcium chloride have good water absorption and long-acting water release functions, can provide enough humidity for the nylon termite-proof layer 4, can play roles in toughening and cooling on one hand, and reduce accelerated aging damage to nylon materials caused by high temperature on the other hand, and on the other hand, the weather resistance of the nylon materials is improved under the environment that the humidity is properly improved.

Furthermore, before the optical cable is used, the polyacrylic resin, the sponge or the calcium chloride material is preferably pre-saturated with water, so that the polyacrylic resin, the sponge or the calcium chloride can play a role in moisturizing in the use process of the optical cable.

Specifically, the method of applying the polyacrylic resin or calcium chloride to the surface of the inner sheath 2 includes, but is not limited to, for example: the outer surface of the inner sheath 2 is coated by bonding a polyacrylic resin or calcium chloride with an adhesive.

In some embodiments, the material of the moisture absorbing and preserving layer 3 is polyacrylic resin, the polyacrylic resin is granule, and the particle size of the polyacrylic resin is 60-80 μm.

Specifically, the granular polyacrylic resin may be a conventional polyacrylic water-absorbing resin, and is not particularly limited, and further, it is preferable that the polyacrylic resin has a particle diameter of 60 to 80 μm, and the particle diameter has an influence on the water absorption capacity and the gel property after water absorption of the polyacrylic resin, and if the particle diameter is too large, the water absorption capacity is insufficient, and when water absorption reaches saturation, the gel strength is uneven; the smaller the particle size, the larger the liquid absorption rate and gel strength of the polyacrylic resin, the higher the liquid absorption rate, but the smaller the particle size and the larger the specific surface area, the aggregation phenomenon is easy to occur, the absorption rate is influenced, and the water retention property is poor.

Specifically, the porous structure of the sponge enables the sponge to have good moisture absorption and preservation functions, and also has good buffer functions, so that the optical fiber can obtain good longitudinal compression resistance, and meanwhile, the inner protection layer can be prevented from being damaged by external force.

Specifically, calcium chloride can react with water to generate a gelatinous substance, is a good moisture absorption and preservation material, and can keep the optical cable with good flexibility.

In some embodiments, the nylon termite resistant layer 4 is a nylon co-doped with carbon black and titanium white.

The ultraviolet resistance of the nylon termite-proof layer 4 can be further improved by adopting the nylon material doped with the carbon black and the titanium dioxide, wherein the carbon black (carbon black) is amorphous, light, loose and extremely fine black powder, has large specific surface area, is a product obtained by incomplete combustion or thermal decomposition of organic matters (natural gas, heavy oil, fuel oil and the like) under the condition of insufficient air, has good light stability, and ultraviolet rays in sunlight can damage the molecular structure of the nylon, accelerate the aging of the nylon termite-proof layer, and the carbon black is used as an ultraviolet light absorber, can improve the ultraviolet resistance of the nylon material and prolong the service life in the open air;

titanium dioxide (titanium dioxide) has large specific surface area, strong surface effect, volume effect, quantum size effect and the like, and the above effects enable the powder to have absorption capacity and certain scattering capacity on ultraviolet rays; electrons on the valence band can receive energy in ultraviolet rays to generate transition, the shorter the wavelength of the ultraviolet rays is, the higher the energy is, the ultraviolet rays in a short wave region are blocked by an absorption mode, and when the ultraviolet rays in the long wave region are irradiated to the surface of the coating, the ultraviolet rays can be blocked in a folding and scattering mode.

Further, the nylon co-doped with carbon black and titanium white may be obtained commercially or by self-making, and is not particularly limited herein, and may be prepared by a method disclosed in patent No. CN101115786a, for example.

In a preferred embodiment, the mass ratio of the carbon black in the nylon material is 0.5-2%, and the mass ratio of the titanium dioxide is 3-5%.

Further, if the nylon ant-preventing layer needs to be black, the proportion of carbon black is properly increased, and if the nylon ant-preventing layer needs to be colored, the proportion of carbon black is properly reduced, and the proportion of titanium dioxide is increased.

In some embodiments, the thickness of the moisture absorption and retention layer 3 is 0.5-2 mm.

The thickness of the moisture absorption and preservation layer 3 has good moisture preservation effect in the range, and meanwhile, the optical cable can be ensured to have certain strength and flexibility.

In some embodiments, the nylon termite resistant layer 4 has a thickness of 0.5 to 1mm.

The thickness of the nylon termite-proof layer 4 has good termite-proof effect in the range, and meanwhile, the optical cable can be guaranteed to have certain strength and flexibility.

In some embodiments, the inner sheath 2 is a plastic inner sheath.

The inner sheath 2 is used for protecting the inner cable core 1.

In some embodiments, the inner sheath 2 is made of polyethylene or polyvinyl chloride.

The polyethylene material and the polyvinyl chloride material have good heat resistance, cold resistance, good chemical stability, higher rigidity and toughness, and good mechanical strength and dielectric property.

As shown in fig. 3, in one embodiment, the cable core 1 is a central beam tube type optical cable core, and the central beam tube type optical cable core includes a loose tube, in which an optical fiber is sleeved, and is filled with a fiber paste.

Specifically, the number of optical fibers sleeved in the loose tube may be set according to the requirement, and optionally, in this embodiment, the number of optical fibers that may be included in each loose tube is 6. In this embodiment, the loose tube includes a paste for filling in addition to the optical fiber.

Fiber paste is one of the materials in the current layer-stranding and center tube communication cables that have the greatest impact on fiber performance. The fiber paste is generally considered to have both protection against moisture intrusion and mechanical cushioning for the optical fiber. A fiber paste is prepared by dispersing a (or several) gelling agent(s) into base oil to form a viscous gel-like substance, and adding antioxidant and other additives (such as antiseptic, viscosity regulator, and hydrogen scavenger) to improve its application performance. Wherein the liquid base oil is thickened to a non-flowable gel state material and also has thixotropic gelling agents which play a significant role in the manufacture and use of the fiber paste. The gelling agents fall into two categories, inorganic and organic, including fatty acid salts, organobentonites, fumed silica, paraffinic hydrocarbons, and high molecular weight copolymers (e.g., styrene and rubber hydrogenated copolymers), and the like.

In another embodiment, as shown in fig. 2, the cable core 1 is a loose tube layer stranded optical cable core, the loose tube layer stranded optical cable core includes a central reinforcing member, and a loose tube is arranged outside the central reinforcing member Zhou Jiaojie, and is sleeved with optical fibers and filled with fiber paste.

In this embodiment, the number of optical fibers required in the optical cable may be different, i.e. the number of loose tubes may be different, according to different requirements. When the number of loose tubes is small, the loose tubes cannot be guaranteed to abut against the periphery of the central reinforcing member, so that the cable core structure of the optical cable is unstable, and in the embodiment, the number of loose tubes is 6.

In order to improve the safety of the optical cable in outdoor use and reduce lightning hidden trouble, the central reinforcement is preferably a non-metal reinforcement, for example FRP, the FRP is made of fiber reinforced plastic, and has the characteristics of light weight, hardness, non-conductivity, high mechanical strength, corrosion resistance and the like.

The present application is further illustrated by the following specific examples.

Example 1

This example 1 provides a weather-resistant termite-resistant optical cable comprising, as shown in fig. 2, a cable core 1, an inner sheath 2, a moisture-absorbing and moisture-retaining layer 3 and a nylon termite-resistant layer 4 in this order from the inside to the outside.

The cable core 1 is a loose sleeve layer-stranded cable core and consists of a central nonmetallic reinforcing part and 6 loose sleeves which are arranged outside Zhou Jiaojie of the central nonmetallic reinforcing part, 6 optical fibers are sleeved in each loose sleeve, fiber paste is filled in each loose sleeve, and the size of each loose sleeve is 1.8mm;

the inner protective layer 2 is made of PE and has a thickness of 2mm;

the moisture absorption and retention layer 3 is made of polyacrylic resin particles with the thickness of 2mm and the particle diameter of 60 mu m;

the nylon termite-proof layer 4 is made of nylon main materials, wherein the carbon black content is 1.8%, the titanium dioxide content is 3%, and the thickness of the nylon termite-proof layer 4 is 0.8mm.

Comparative example 1

This comparative example 1 provides an ant-preventing optical cable comprising most of the structure of example 1, differing only in that:

the moisture absorption and preservation layer 3 is not arranged, and the nylon termite-proof layer 4 does not contain carbon black and titanium dioxide.

Performance test:

the weather-resistant termite-proof optical cable provided in example 1 was subjected to humidity conditioning at 80% humidity for 1 week to bring the moisture absorption layer of the optical cable to a state of approximately saturation, and then the optical cables provided in example 1 and comparative example 1 were subjected to a xenon lamp aging test according to UL1581, and the test results were: the elongation at break retention of the termite-resistant optical cable of comparative example 1 was reduced to 3.2% after 500 hours of aging of the xenon lamp, the elongation at break retention of the weather-resistant termite-resistant optical cable of example 1 was 21.48% after 2000 hours of aging of the xenon lamp, and the weather resistance was improved by 4 times.

Example 2

This example 2 provides a weather-resistant termite-resistant optical cable comprising, as shown in fig. 3, a cable core 1, an inner sheath 2, a moisture-absorbing and moisture-retaining layer 3 and a nylon termite-resistant layer 4 in this order from the inside to the outside.

The cable core 1 is a central beam tube type cable core and comprises a loose tube, 6 optical fibers are sleeved in the loose tube, fiber paste is filled in the loose tube, and the size of the loose tube is 3mm;

the inner protective layer 2 is made of PVC and has a thickness of 1mm;

the moisture absorption and preservation layer 3 is made of sponge, and the thickness is 0.5mm;

the nylon termite-proof layer 4 is made of nylon main materials, wherein the carbon black content is 1.8%, the titanium dioxide content is 3%, and the thickness of the nylon termite-proof layer 4 is 0.8mm.

Comparative example 2

This comparative example 2 provides an ant-preventing optical cable comprising a majority of the structures of example 2, differing only in that:

the moisture absorption and preservation layer 3 is not arranged, and the nylon termite-proof layer 4 does not contain carbon black and titanium dioxide.

Performance test:

the weather-resistant termite-proof optical cable provided in example 2 was subjected to humidity conditioning at 80% humidity for 1 week to bring the moisture absorption layer of the optical cable to a state of approximately saturation, and then the optical cables provided in example 2 and comparative example 2 were subjected to a xenon lamp aging test according to UL1581, and the test results were: the elongation at break retention of the termite-resistant optical cable of comparative example 2 was reduced to 2.5% after 500 hours of aging of the xenon lamp, the elongation at break retention of the weather-resistant termite-resistant optical cable of example 2 was 27.99% after 1500 hours of aging of the xenon lamp, and the weather resistance was improved by 3 times.

To sum up, the application provides a resistant termite-proof optical cable is through preventing the inside moisture absorption layer that moisturizes that sets up of termite-proof layer at nylon, can improve 15% -30% with nylon material toughness, and the nylon of this application is prevented the termite-proof layer to the cooperation simultaneously, and weather resistance can promote more than 3 times, can resist the injury that ultraviolet ray and high temperature brought for outdoor scene, all-dielectric material effectively avoids thunder and lightning hidden danger, and the security is high.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

It should be noted that in this application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A weather-resistant termite-resistant optical cable comprising:

the cable core (1) and the inner protective layer (2), the moisture absorption and preservation layer (3) and the nylon termite-proof layer (4) which are sequentially arranged from inside to outside at the outer side of the cable core (1) are coaxially clung;

the moisture absorption and preservation layer (3) is made of polyacrylic resin, sponge or calcium chloride;

the polyacrylic resin is a granule, and the particle size of the polyacrylic resin is 60-80 mu m.

2. The weather-resistant termite-resistant optical cable according to claim 1, wherein the nylon termite-resistant layer (4) is nylon co-doped with carbon black and titanium white.

3. A weather-resistant termite-resistant optical cable according to claim 1, wherein the thickness of the moisture-absorbing and retaining layer (3) is 0.5 to 2mm.

4. A weather-resistant termite-resistant optical cable according to claim 1, wherein the thickness of the nylon termite-resistant layer (4) is 0.5 to 1mm.

5. A weather-resistant termite-resistant optical cable according to claim 1, wherein the inner sheath (2) is a plastic inner sheath.

6. The weather-resistant termite-resistant optical cable according to claim 5, wherein the inner sheath (2) is made of polyethylene material or polyvinyl chloride material.

7. A weather-resistant termite-resistant optical cable according to claim 1, wherein the cable core (1) is a central tube-type optical cable core comprising a loose tube in which an optical fiber is housed and which is filled with a fiber paste.

8. A weather-resistant termite-resistant optical cable according to claim 1, wherein the cable core (1) is a loose tube lay-type optical cable core, the loose tube lay-type optical cable core comprises a central reinforcement member, a loose tube is arranged outside the central reinforcement member Zhou Jiaojie, and the loose tube is sleeved with optical fibers and filled with fiber paste.