CN205121026U - Light -duty armor protection against rodents optical cable that zooms out - Google Patents

Abstract

The utility model relates to a light-duty armored anti-mouse pull-out optical cable. The optical cable sequentially includes: tightly wrapped optical fiber, aramid fiber reinforced layer, central tube sheath layer, stainless steel armored layer, and non-metallic reinforcement from inside to outside. and an outer sheath, the tight-clad optical fiber includes an optical fiber and an optical fiber tight cladding coated on the outer layer of the optical fiber, and the optical fiber tight cladding is polybutylene terephthalate capable of reducing the internal stress of the optical fiber Alcohol ester tight cladding; the stainless steel armor layer is a stainless steel spiral armor layer wrapped by a stainless steel hose, and the gaps between the stainless steel armor layers formed by the stainless steel hose are consistent. While satisfying the anti-rodent performance, the optical cable also has excellent mechanical and environmental properties such as anti-crush, anti-ultraviolet, bending and torsion, flame retardant, etc.

Description

Light armored anti-rat remote optical cable

technical field

The utility model belongs to the field of optical cable manufacturing, in particular to a light-duty armored anti-rat remote optical cable.

Background technique

The birth and development of optical fiber communication is an important revolution in the history of telecommunications. Optical fiber communication has changed the traditional communication method, making it possible to communicate with high speed and large capacity without various magnetic interference. With the continuous development of fiber optic cable and communication technology, fiber optic communication technology has also been greatly improved. The advantages of fiber optic cable make its use in the field of communication continue to be broadened. At present, fiber optic cable is developing rapidly and widely used. The scope has entered various fields of wired communication and has become the main communication mode of modern communication, and has a deeper and deeper impact on social life.

In many areas with lush vegetation such as wilderness and mountainous areas in our country, it is more suitable for rodents to survive. Because the incisors of rodents are very developed and will continue to grow, they keep their teeth sharp by biting objects, and the unique smell contained in the plastic in the cable sheath is easy Attract rodents to bite, so communication optical cable lines are often bitten by rats in some occasions and affect the quality of communication. In severe cases, it can even lead to the termination of the trunk communication network and cause great losses to society. In addition, in some buildings in the urban area, the upper space of the ceiling, between the stairs and in the wiring shaft are also places where rat activities are relatively rampant. Therefore, the anti-rat function is an important indicator to ensure the quality and service life of optical cable communication. Optical cable rodent protection refers to protecting the optical cable from damage caused by rodents by various organizational forms without endangering the transmission characteristics and long-term stability of the optical cable. An anti-rat optical cable combined with glass fiber yarn and stainless steel armored tube opens up a new world for anti-rat optical cable.

At present, the traditional armored anti-rat optical cable is longitudinally wrapped with a steel tape outside the conventional radio frequency remote optical cable, and a layer of polyethylene sheath material is extruded outside the steel tape. The outer diameter of the traditional armored anti-rat optical cable is large and bends The performance is poor, and it takes up a lot of space, which brings inconvenience to subsequent use.

Utility model content

In order to solve the above-mentioned technical problems, the utility model provides a light-weight armored anti-mouse pull remote optical cable, which not only meets the performance of anti-rat, but also has superior resistance to crushing, anti-ultraviolet, bending and twisting, flame retardant and many other mechanical properties. Environmental performance, the optical cable is suitable for the introduction of communication base stations in areas where rat disasters occur frequently.

In order to achieve the above object, the technical scheme of the utility model is as follows:

A light-weight armored rat-proof remote optical cable, the optical cable includes: tight-packed optical fiber, aramid fiber reinforcement layer, central tube sheath layer, stainless steel armor layer, non-metallic reinforcement and outer sheath from the inside to the outside , the tight-clad optical fiber includes an optical fiber and an optical fiber tight cladding coated on the outer layer of the optical fiber, and the optical fiber tight cladding is a polybutylene terephthalate tight cladding that can reduce the internal stress of the optical fiber layer; the stainless steel armor layer is a stainless steel spiral armor layer wrapped by a stainless steel hose, and the gaps between the stainless steel armor layers composed of the stainless steel hose are consistent.

In a preferred embodiment of the present invention, it further includes that the width of the stainless steel hose is 1.25mm, and the gap between the stainless steel hose is 0.1-0.2mm.

In a preferred embodiment of the present invention, it further includes that two 0.6mm tight-wrapped optical fibers are coated with the aramid fiber reinforcement layer, and the aramid fiber reinforcement layer is coated with a layer of low-smoke The halogen sheath forms the sheath layer of the central tube, the outer armored stainless steel hose of the central tube sheath layer forms the stainless steel armor layer, and the stainless steel armor layer covers a layer of the non-metallic reinforcement , the outer layer of the non-metallic reinforcement is coated with a low-smoke, halogen-free outer sheath.

In a preferred embodiment of the present invention, it further includes that the non-metallic reinforcement includes aramid fiber yarn and glass fiber yarn, and the aramid fiber yarn is wrapped on the outer layer of the stainless steel armor layer, the The glass fiber yarn is wrapped on the outer layer of the aramid fiber yarn.

In a preferred embodiment of the present invention, it further includes that the maximum allowable crushing force of the optical cable is 3000N/10cm, and the maximum allowable tensile force is 450N.

The beneficial effects of the utility model are:

Firstly, the optical cable in the utility model not only satisfies the rodent-proof performance, but also has many mechanical environmental performances such as superior flattening resistance, ultraviolet resistance, bending and twisting, and flame retardancy.

Second, the optical cable of the present utility model has a small outer diameter, takes up little space, and has a simple structure, light weight, convenient and fast construction, greatly reduces the construction period and construction cost, and provides a new solution for the development of optical communication .

Third, the optical cable of the present invention is a low-smoke and halogen-free sheathed optical cable, which has many properties such as low-smoke, halogen-free, flame-retardant, ultraviolet-resistant, and wear-resistant. The optical cable is suitable for indoor use.

Fourth, the optical cable of the present invention adopts a light-weight armored structure of a central tube, which meets the mechanical performance and environmental performance of the optical cable.

Fifth, the temperature resistance requirement of the optical cable of the present invention is -40°C-+70°C, the allowable flattening force is 3000N/10cm, the allowable tensile force is 450N, and it passes the single vertical burning requirement of IEC60332-1.

Sixth, the utility model optical cable of the present invention uses a standard φ2.0 wireless radio remote sub-cable, and when connecting between the baseband unit (BBU) and the wireless radio remote unit (RRU), the user does not need to purchase additional non-standard Connector accessories.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiment technology of the present invention, the accompanying drawings that need to be used in the technical description of the embodiment will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the embodiment of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a schematic cross-sectional structure diagram of an optical cable of the present invention.

Fig. 2 is the process flow diagram of the manufacturing method of the utility model.

Among them, 1-aramid fiber reinforcement layer, 2-optical fiber, 3-optical fiber tight cladding, 4-central tube sheath layer, 5-stainless steel armor layer, 6-non-metallic reinforcement, 7-outer sheath.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Example 1

Embodiment 1 discloses a light-weight armored anti-rodent optical cable. According to the conditions of use, the optical cable needs to have the following characteristics: excellent anti-rat performance, excellent resistance to crushing, anti-ultraviolet, bending and twisting, flame retardant and many other mechanical environments Performance, the optical cable is suitable for the introduction of communication base stations in areas where rat disasters occur frequently.

When designing the optical cable structure in this embodiment, the following points are mainly considered:

1. The selection of tight sleeve optical fiber material in the optical cable determines the performance of the optical cable in the use environment. According to the use environment of the optical cable, the tight sleeve material must meet the superior environmental performance. In the selection process, polybutylene terephthalate ( PBT) material is extruded to the surface of the optical fiber, and this material is used for the first time in the field of indoor optical cable tight-packed optical fiber.

2. The structure of the optical cable adopts a central tube structure, and there are two tightly wrapped optical fibers in the central tube. After adding aramid fiber yarn to the tightly wrapped optical fiber, a layer of low-smoke and halogen-free sheath material is extruded to ensure The optical properties are not affected.

3. The stainless steel armored layer outside the center tube is a spiral stainless steel armored layer. During the armoring process, the flexibility of the optical cable and the processing technology of the prefabricated end devices are considered. The width of the armored layer stainless steel hose is designed to be 1.25mm, and the armored tube The gap is designed between 0.1-0.2mm to ensure the anti-rodent performance and mechanical performance of the optical cable.

4. The central tube is armored and the outer layer is covered with non-metallic reinforcements to ensure that the optical cable can withstand high mechanical and environmental performance. Considering the use of optical cables, aramid fiber yarn and glass fiber yarn are used in the selection process of non-metallic reinforcements. The combined method can not only meet the flexibility of the optical cable but also prevent rats from biting.

5. In order to ensure that the optical cable has many properties such as low-smoke, halogen-free, flame-retardant, anti-ultraviolet, and wear-resistant, the outer protection material adopts a low-smoke and halogen-free sheath.

The structure of the optical cable in Embodiment 2 is shown in Figure 1, and the above-mentioned optical cable comprises from the inside to the outside in turn: tight-wrapped optical fiber, aramid fiber reinforcement layer 1, central tube sheath layer 4, stainless steel armor layer 5, non-metallic Reinforcement 6 and outer sheath 7 . The tight cladding of the above-mentioned optical fiber is a polybutylene terephthalate tight cladding capable of reducing the internal stress of the optical fiber; the dual-number stainless steel armor layer 5 is a stainless steel spiral armor layer wrapped by a stainless steel hose, The gaps between the stainless steel armor layers 5 composed of the stainless steel hoses are consistent; the width of the stainless steel hoses is 1.25mm, and the gaps between the stainless steel hoses are 0.1-0.2mm.

The above-mentioned aramid fiber reinforcement layer 1 covers two 0.6mm tightly wrapped optical fibers, and the above-mentioned central tube sheath layer 4 is a low-smoke and halogen-free sheath extruded to the outside of the above-mentioned aramid fiber reinforcement layer 1 .

The non-metal reinforcement 6 includes aramid fiber yarn and glass fiber yarn, the aramid fiber yarn is wrapped on the outer layer of the stainless steel armor layer 5, and the glass fiber yarn is wrapped on the outer layer of the aramid fiber yarn.

The structure of the optical cable in Example 1 is as follows: two 0.6mm tightly wrapped optical fibers are coated with aramid fiber yarn and then extruded with a layer of low-smoke halogen-free sheath to make a central tube, and the outer layer of the central tube is stainless steel spiral armored. The stainless steel armor layer is covered with a layer of non-metallic aramid fiber yarn and glass fiber yarn reinforcement layer, and then extruded with a layer of low-smoke and halogen-free sheath.

In the light-duty armored anti-rodent pull-out optical cable in Example 1, the anti-rat layer adopts the combination of glass fiber yarn and stainless steel armor, and increases the anti-rat of the optical cable on the basis of not affecting the mechanical performance and environmental performance of the optical cable. Bite and many other properties. The tight cladding of optical fiber adopts polybutylene terephthalate (PBT) tight sleeve, and the tight sleeve of polybutylene terephthalate (PBT) material is less affected by external influence, and the attenuation has better stability. It can withstand wider high and low temperature environments; the non-metallic reinforcement adopts the combination of aramid fiber yarn and glass fiber yarn, which can have better anti-rat performance; according to the use environment of the optical cable, LSZH flame-retardant material is used to achieve flame retardancy and environmental performance requirements.

The light-duty armored mouse-proof remote optical cable in Example 1 has a simple structure, light weight, convenient and fast construction, and greatly reduces the construction period and construction cost; it is designed with glass fiber yarn and stainless steel spiral armor structure, and the glass fiber yarn has Good abrasion resistance, thermal insulation, and insulation properties; it ensures that the optical cable can still work normally when the temperature is too high or too low, and adapts to more harsh environments. The characteristics of insulation make the optical cable free from lightning strikes or other electromagnetic interference. Glass fiber yarn has obvious anti-rat bite function. Winding, weaving and other processes to form glass fibers for rodent prevention methods for optical cables came into being. The diameter of glass fiber monofilaments ranges from a dozen microns to more than 20 microns, which is equivalent to 1/20 of a hair. 1/5, each bundle of fibers consists of hundreds or even tens of thousands of monofilaments. Because the glass fiber is extremely thin and brittle, the crushed glass slag will injure the mouth of the rodent during the bite process of the rodent, making it fearful of the optical cable and achieving the effect of preventing rodents.

Using an armoring machine to wrap the stainless steel hose on the surface of the central tube with certain rules to form a tight protective layer (or armored layer), which can play a better anti-rat effect; after testing, the utility model optical cable The temperature resistance requirement reaches -40°C-+70°C, the allowable short-term tensile force reaches 450N, the short-term crushing force reaches 3000N/10cm, and passes the single vertical combustion requirement of IEC60332-1; it provides a new solution for the development of access network .

Example 2

As shown in Figure 2, Embodiment 2 discloses a manufacturing method for preparing the light-weight armored anti-rat remote optical cable in Embodiment 1, the method includes the following steps:

Fiber warehousing: Screen the warehousing optical fibers, and select optical fibers with qualified transmission performance and tension.

Tight sleeve process: Extrude the optical fiber tight package material on the surface of the optical fiber to make a tight package optical fiber.

Center tube process: wrap aramid fiber yarn on the above tight-packed optical fiber, and then extrude a layer of center tube material on the outside of the aramid fiber yarn to form a center tube structure.

Armoring process: the central tube is coated with a stainless steel hose to form a spiral stainless steel armor layer. The stainless steel armor layer improves the rodent resistance and mechanical properties of the optical cable, and the above stainless steel armor layer is coated with non-metallic reinforcements. Non-metallic strength members improve the flexibility of the cable.

Outer protection process: Extrude a layer of low-smoke and halogen-free material on the outer layer of the above-mentioned non-metallic reinforcement as the outer sheath.

Out-of-warehouse inspection: The optical cable is tested for full performance, and it is packaged out of the warehouse after passing the inspection.

In the process of implementing the process, the control of the process has an important impact on the performance of the optical cable:

1. Optical performance control of tight-packed optical fiber. The optical performance of tight-packed optical fiber is the most critical factor in determining the optical performance of optical cables. Therefore, the control of optical fiber performance in the tight-packed process is very critical. After testing, it was found that different polybutylene terephthalate (PBT) materials combined with the same extrusion process had significant changes in optical properties. The production process has been adjusted: including tight-packed optical fiber take-up and pay-off tension, adjusting the water temperature difference between different water tanks, the distance of the water tanks, and changing to PBT materials with appropriate performance, etc., to reduce the polybutylene terephthalate. Ester (PBT) material changes in the internal stress of tight-packed optical fiber. PBT is a widely used fiber optic cable casing material in this field, which has good mechanical properties, stable structure and chemical properties, and creep resistance. The PBT material used in this embodiment has the largest elongation rate, the smallest tensile strength, and the lowest thermal shrinkage rate. Combined with the continuous exploration and improvement of the production process, it can well tightly cover the optical performance of the optical fiber.

2. Control of the softness of the armored layer. The stainless steel armored layer mainly controls the softness of the armored layer and the mechanical properties of the optical cable during the production process. According to the use environment of the optical cable, the thickness and gap of the armored layer must be ensured during the armoring process. , a special design is made for the mold of the tape-making process of the armored equipment to ensure the uniformity of the width and thickness of the armored tube (stainless steel hose). Consistency of layer gaps. In the armoring process, the width of the stainless steel hose is 1.25mm, and the gap between the stainless steel hose is 0.1-0.2mm.

3. The stripping performance of the sheath process optical cable. In the production process of the optical cable sheath, the stripping performance of the optical cable needs to be guaranteed. Since the optical cable contains a stretchable stainless steel armor layer, the process is not well controlled during the production process, which will lead to the use of the optical cable The stainless steel armor layer expands and contracts in the sheath layer. The relevant tests show that the tightness of the optical cable plays a crucial role in the stainless steel armor layer. In the sheath process, the design of the mold and the control of the production process ensure the compactness of the optical cable. Spend.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. A light-duty armored anti-rat remote optical cable, the optical cable comprises from the inside to the outside: tightly wrapped optical fiber, aramid fiber reinforcement layer, central tube sheath layer, stainless steel armor layer, non-metallic reinforcement and outer The sheath is characterized in that the tight-clad optical fiber includes an optical fiber and an optical fiber tight cladding coated on the outer layer of the optical fiber, and the optical fiber tight cladding is polyethylene terephthalic acid capable of reducing the internal stress of the optical fiber Butanediol ester tight cladding; the stainless steel armor layer is a stainless steel spiral armor layer formed by wrapping a stainless steel hose, and the gaps between the stainless steel armor layers formed by the stainless steel hose are consistent. 2. The light-weight armored anti-rat remote optical cable according to claim 1, characterized in that, the width of the stainless steel hose is 1.25 mm, and the gap between the stainless steel hoses is 0.1-0.2 mm. 3. The light-duty armored rat-proof remote optical cable according to claim 1, characterized in that, the aramid fiber reinforcement layer is coated with two 0.6mm tightly wrapped optical fibers, and the aramid fiber reinforcement layer is A layer of low-smoke halogen-free sheath is coated on the outside to form the sheath layer of the central tube, and the outer armored stainless steel hose of the sheath layer of the central tube forms the stainless steel armor layer, and the stainless steel armor layer covers A layer of the non-metal reinforcement, the outer layer of the non-metal reinforcement is coated with a low-smoke halogen-free outer sheath. 4. The light-duty armored rat-proof remote optical cable according to claim 3, wherein the non-metallic reinforcing member comprises aramid fiber yarn and glass fiber yarn, and the aramid fiber yarn is wrapped on the stainless steel The outer layer of the armor layer, the glass fiber yarn is wrapped on the outer layer of the aramid fiber yarn. 5. The light-weight armored anti-rat remote optical cable according to any one of claims 1-4, characterized in that the allowable crushing force of the optical cable is a maximum of 3000N/10cm, and the maximum allowable tensile force is 450N.