阅读说明：本技术 一种防鼠光缆及其施工方法 (Rat-proof optical cable and construction method thereof ) 是由 周宇 肖毅 谢君伟 刘又维 刘磊 周叶 于 2019-09-10 设计创作，主要内容包括：本申请涉及光缆相关领域,具体是一种利用不锈钢优异的强度性能为光纤提供防护能力的防鼠光缆及其施工方法,其包括如下步骤：步骤一、首先将空芯光缆进行布放；步骤二、用锥形头与光纤的端头相互连接,锥形头在气吹送中起到牵引光纤前进的作用。步骤三、依据需要使用的光纤芯数,利用高压氮气将光纤通过气吹机吹送到空芯光缆中；步骤四、光纤气吹到位后,在装有光纤的空芯光缆两端使用纤膏进行密封,形成光缆；本申请能够依据运行业务的变化,送吹不同类型的光纤及不同数量的光纤,具有高度的灵活性,后期维护也可将故障光纤吹出,重新将完好光纤送入,无需废弃光缆。(The application relates to the field of optical cables, in particular to a rat-proof optical cable for providing protection capability for optical fibers by utilizing excellent strength performance of stainless steel and a construction method thereof, wherein the rat-proof optical cable comprises the following steps: firstly, laying a hollow optical cable; and step two, the conical head is connected with the end of the optical fiber, and the conical head plays a role in drawing the optical fiber to advance in air blowing. Blowing the optical fiber into the hollow optical cable by using high-pressure nitrogen through an air blower according to the number of optical fiber cores required to be used; fourthly, after the optical fibers are blown in place, sealing two ends of the hollow optical cable provided with the optical fibers by using fiber paste to form the optical cable; this application can send the optic fibre of blowing different grade type and the optic fibre of different quantity according to the change of operation business, has high flexibility, and later maintenance also can blow out trouble optic fibre, sends into intact optic fibre again, need not abandonment optical cable.)

1. A construction method of a rat-proof optical cable is characterized by comprising the following steps: the method comprises the following steps:

firstly, laying a hollow optical cable;

and step two, the conical head (5) is connected with the end of the optical fiber (6), and the conical head (5) plays a role in drawing the optical fiber (6) to advance in air blowing.

2. Blowing the optical fiber (6) into the hollow optical cable by using high-pressure nitrogen through an air blower according to the core number of the optical fiber (6) required to be used;

fourthly, after the optical fibers (6) are blown in place, sealing the two ends of the hollow optical cable provided with the optical fibers (6) by using fiber paste (10) to form the optical cable;

the construction method of the ratproof optical cable according to claim 1, wherein: the arrangement in the first step comprises overhead or direct burial.

3. The construction method of the ratproof optical cable according to claim 1, wherein: the hollow optical cable in the first step comprises a stainless steel pipe (1) and a plurality of stainless steel wires (2), a polyethylene protective layer (3) is extruded outside the stainless steel wires (2), the stainless steel wires (2) extruded with the polyethylene protective layer (3) are spirally twisted outside the stainless steel pipe (1), the stainless steel wires extruded with the polyethylene protective layer (3) are twisted and then bundled to form a cable core, and a polyethylene sheath (4) is extruded outside the cable core.

4. The construction method of the ratproof optical cable according to claim 1, wherein: the conical head (5) in the second step is made of polytetrafluoroethylene.

5. The construction method of the ratproof optical cable according to claim 1, wherein: and the optical fiber (6) in the second step is stored in an optical fiber (6) discharging device before blowing, the optical fiber (6) discharging device comprises an optical fiber disc (7), a direct current motor (8) and a power supply battery pack, the optical fiber disc (7) is connected with the direct current motor (8), the direct current motor (8) is connected with the battery pack, and the rotating speed of the direct current motor (8) is positively correlated with the air pressure blown by the air blower.

6. The construction method of the ratproof optical cable according to claim 1, wherein: and in the third step, the optical fiber (6) is blown into the stainless steel pipe (1) of the hollow optical cable by an air blower.

7. The construction method of the ratproof optical cable according to claim 1, wherein: and in the air blowing process in the third step, nitrogen with the purity of 99.90-99.95% is adopted for blowing.

8. A ratproof optical cable obtained by the construction method of any one of claims 1 to 7, characterized in that: the cable comprises optical fibers (6), a stainless steel pipe (1) and a plurality of stainless steel wires (2), wherein the optical fibers (6) are placed inside the stainless steel pipe (1), a polyethylene protective layer (3) is extruded outside the stainless steel pipe (2), the stainless steel wires (2) extruded with the polyethylene protective layer (3) are twisted outside the stainless steel pipe (1), the stainless steel wires (2) extruded with the polyethylene protective layer (3) are twisted and then bundled to form a cable core, and a polyethylene sheath (4) is extruded outside the cable core.

9. The ratproof optical cable of claim 8, wherein: and a plurality of stainless steel wires extruded with the polyethylene protective layer (3) are shaped by bundling polyester yarns.

10. The ratproof optical cable of claim 8, wherein: the inner diameter of the stainless steel pipe is 1.6-5 mm; the diameter of the stainless steel wire is 0.45-1.0mm, and the thickness of the polyethylene protective layer (3) is 0.2-0.3 mm; the integral outer diameter of the stainless steel wire with the polyethylene protective layer (3) is 0.85-1.4 mm; the thickness of the polyethylene sheath (4) is 1.8-2.0 mm.

Technical Field

The application relates to the field of optical cables, in particular to a rat-proof optical cable which provides protection capability for optical fibers by utilizing excellent strength performance of stainless steel and a construction method thereof.

Background

The application scenes of the communication optical cable comprise modes of overhead, pipe penetration, direct burial and the like, and in the application environments, the optical cable is often bitten by rodents to cause optical fiber communication interruption.

The optical cable is protected against rats by two methods, namely a chemical protection method and a physical protection method. The chemical protection method is characterized in that a repellent is added into an optical cable sheath material, the method causes damage to the production environment and the application environment, and the repellent migrates to lose the protection effect with the lapse of time. The physical protection method adopts a metal armor form, and the main method adopts thin round steel wire armor and metal tape armor to utilize the high strength of metal, so that rats can not damage an armor layer, thereby achieving the effect of protecting optical fibers.

The existing ratproof optical cable is constructed once, and the method has the following defects: the construction of the optical fiber and the optical cable is completed at one time, no change can be made at the later stage, and the type and the number of the optical fiber cannot be changed. Because the number of optical fibers in the optical cable cannot be increased or decreased, the excess reservation is wasted, or the development is too fast, so that the optical fibers are insufficient.

Disclosure of Invention

The application aims at the defects and problems existing in the existing application and provides a ratproof optical cable and a construction method thereof.

In order to achieve the technical effects, the technical scheme of the application is as follows:

a construction method of a rat-proof optical cable is characterized by comprising the following steps: the method comprises the following steps:

firstly, laying a hollow optical cable; the hollow core fiber optic cables and optical fibers referred to herein together comprise a complete fiber optic cable.

And step two, the conical head is connected with the end of the optical fiber, and the conical head plays a role in drawing the optical fiber to advance in air blowing. The tapered configuration in the conical head is advantageous in reducing drag in use. Theoretically, connectors of other shapes can also be used.

Blowing the optical fiber into the hollow optical cable by using high-pressure nitrogen through an air blower according to the number of optical fiber cores required to be used; nitrogen, which is the most readily available inert gas in bulk and economical, provides protection to the fiber from moisture in the air coming into contact with the fiber.

Fourthly, after the optical fibers are blown in place, sealing two ends of the hollow optical cable provided with the optical fibers by using fiber paste to form the optical cable; the optical fiber is used in a space with two closed ends for a long time.

The hollow optical cable is manufactured by armouring and protecting the optical fiber from inside to outside in the production process, but the optical fiber is not put into the optical cable.

The arrangement in the first step comprises overhead or direct burial.

The hollow optical cable in the first step comprises a stainless steel pipe and a plurality of stainless steel wires, a polyethylene protective layer is extruded outside the stainless steel wires, the stainless steel wires extruded with the polyethylene protective layer are spirally twisted outside the stainless steel pipe, the stainless steel wires extruded with the polyethylene protective layer are twisted and then bundled to form a cable core, and a polyethylene sheath is extruded outside the cable core.

And the conical head in the second step is made of polytetrafluoroethylene.

And the optical fiber in the step two is stored in an optical fiber discharging device before blowing, the optical fiber discharging device comprises an optical fiber disc, a direct current motor and a battery pack for power supply, the optical fiber disc is connected with the direct current motor, the direct current motor is connected with the battery pack, and the rotating speed of the direct current motor is in positive correlation with the air pressure blown by the air blower. When the air pressure is large, the rotating speed of the direct current motor is high, and when the air pressure is small, the rotating speed of the direct current motor is low. The optical fiber pay-off device is used in cooperation with an air blower when optical fibers need to be blown into the optical cable after the optical cable is laid.

And in the third step, the optical fiber is blown into the stainless steel pipe of the hollow-core optical cable by an air blower.

And in the air blowing process in the third step, nitrogen with the purity of 99.90-99.95% is adopted for blowing.

A rat-proof optical cable formed by the construction method is characterized in that: the cable comprises optical fibers, a stainless steel pipe and a plurality of stainless steel wires, wherein the optical fibers are placed inside the stainless steel pipe, a polyethylene protective layer is extruded outside the stainless steel pipe, the stainless steel wires extruded with the polyethylene protective layer are spirally twisted outside the stainless steel pipe, the stainless steel wires extruded with the polyethylene protective layer are twisted and then bundled to form a cable core, and a polyethylene sheath is extruded outside the cable core.

And (3) shaping the plurality of stainless steel wires extruded with the polyethylene protective layer by bundling polyester yarns.

The inner diameter of the stainless steel pipe is 1.6-5 mm.

The diameter of the stainless steel wire is 0.45-1.0mm, and the thickness of the polyethylene protective layer is 0.2-0.3 mm.

The stainless steel wire with the polyethylene protective layer has an overall outer diameter of 0.85-1.4 mm.

The thickness of the polyethylene sheath is 1.8-2.0 mm.

The application has the beneficial effects that:

1. the traditional optical cable construction is that the optical cable is arranged in an overhead or direct-buried manner, and the optical fiber and the optical cable are integrally finished at the same time. According to the rat-proof optical cable, in the manufacturing process, optical fibers are not placed in stainless steel, and after the hollow optical cable is laid by an overhead or direct-buried method, the optical fibers of different types and different quantities are sent into the stainless steel protection tube in an air blowing mode according to the requirements of services. This application can send the optic fibre of blowing different grade type and the optic fibre of different quantity according to the change of operation business, has high flexibility, and later maintenance also can blow out trouble optic fibre, sends into intact optic fibre again, need not abandonment optical cable.

2. The rat-proof optical cable provided by the application has the advantages that the stainless steel tube and the stainless steel wire are used for protecting the optical fiber, the optical fiber is prevented from being damaged by rats, and the smooth communication is ensured.

Drawings

Fig. 1 is a schematic structural view of the rat-proof optical cable of the present application.

FIG. 2 is a schematic view of a cone structure according to the present application.

Fig. 3 is a schematic structural view of the optical fiber pay-out device according to the present application.

Fig. 4 is a view of the optical cable after the fiber paste is sealed.

In the drawings: the optical fiber cable comprises a stainless steel pipe 1, a stainless steel wire 2, a polyethylene protective layer 3, a polyethylene sheath 4, a conical head 5, an optical fiber 6, an optical fiber disc 7, a direct current motor 8, a direct current battery pack 9 and a fiber paste 10.

Detailed Description