Layer-stranded optical cable and cabling method thereof

Abstract

The invention relates to a layer-stranded optical cable and a cabling method thereof, the layer-stranded optical cable comprises a cable core, an inner sheath wrapped outside the cable core, and a metal protective layer, a mouse glue layer and an outer sheath which are sequentially arranged outside the inner sheath, and the metal protective layer is a metal mesh belt which is provided with spines and is wound and wrapped outside the inner sheath. The mouse sticking adhesive layer is a mouse sticking adhesive tape wound and wrapped outside the metal protective layer, and a glass fiber mesh is arranged in the outer sheath. First-time rat prevention can be achieved through the glass fiber net in the outer sheath, after the outer sheath is damaged, rat sticking glue in the rat sticking glue layer can stick and kill rats, secondary rat prevention is achieved, after the rat sticking glue layer is damaged, third-time rat prevention can be achieved through the metal protection layer, the rat prevention performance of the optical cable can be improved, optical fibers in the optical cable can be effectively protected, and the service life of the optical cable is prolonged. And communication stability is ensured.

Description

Technical field:

[0001] The invention belongs to the technical field of optical cables, and in particular relates to a layer-stranded optical cable and a cabling method thereof. Background technology:

[0002] With the rapid development of communication industry, the application of outdoor optical cables for communication is increasing. Stranded optical cable is composed of multiple sleeves containing optical fibers twisted around the central reinforcement member to form a round cable core. The metal or non-metal reinforcement member is located in the center of the optical cable, and the loose sleeve containing the optical fiber is arranged around the reinforcement member. It has a high fiber density per unit area and a simple and mature manufacturing process. It is the most widely used optical cable structure at present.

[0003] However, the existing layer-twisted optical cables have poor anti-rat performance. The layer-twisted optical cables laid outdoors are often gnawed by rats during use, which can easily cause damage to the optical cables. Especially in rural areas, mountainous areas, areas with developed vegetation and good natural conditions, the damage to optical cables by rats is particularly serious, which not only affects the service life of the optical cables, but also easily causes communication signal transmission failures, causing serious economic losses, and even causing the risk of cable breakage, resulting in communication interruption and affecting the security of the communication network.

[0004] With the development of optical cable manufacturing technology, rat-proof layer-twisted optical cables have appeared on the market. However, existing rat-proof layer-twisted optical cables generally use chemical rat-proofing and physical rat-proofing to improve the optical cable's ability to resist biological invasion. Chemical rat-proofing generally involves adding rat-proof capsaicin to the sheath material, but capsaicin is volatile and easily causes environmental pollution, which is also harmful to the staff. Moreover, as the rat-proofing agent evaporates, its rat-proofing performance weakens or even disappears. Physical rat-proofing usually involves adding a metal protective layer or / and a glass fiber layer to the layer-twisted optical cable. The metal protective layer cannot be gnawed by rats, so the metal protective layer has excellent rat-proofing performance. However, adding a metal protective layer increases the weight of the optical cable, and it is not easy to bend, which is not conducive to the optical cable being rolled into a coil. The glass fiber layer is provided because the glass fiber is fragile. When mice gnaw on the glass fiber layer, the broken glass fibers will hurt the mice's mouths, making them afraid of the optical cable, thus achieving a rat-proof effect. However, in the existing twisted optical cable, the glass fiber layer is located inside the outer protective layer outside the optical cable. When mice gnaw on the glass fiber layer, the outer protective layer outside it has been gnawed through, affecting the protective effect of the outer protective layer on the cable core. Summary of the invention:

[0005] In summary, in order to overcome the deficiencies of the prior art problems, the present invention provides a layer-twisted optical cable, which has a metal protective layer, the metal protective layer adopts a metal mesh belt with spikes, the metal mesh belt is wrapped around the optical cable, a mouse-sticking glue layer is arranged outside the metal protective layer, the mouse-sticking glue layer is also wrapped outside the metal protective layer, an outer sheath is arranged outside the mouse-sticking glue layer, and the outer sheath contains a glass fiber mesh, and the first mouse-proofing can be achieved by the glass fiber mesh in the outer sheath, and after the outer sheath is destroyed, the mouse-sticking glue in the mouse-sticking glue layer will stick to mice and kill rats, achieving secondary mouse-proofing, and after the mouse-sticking glue layer is destroyed, the metal protective layer can achieve three mouse-proofing, which can improve the mouse-proofing performance of the optical cable, effectively protect the optical fiber in the optical cable, and ensure stable communication. At the same time, the present invention also provides a cabling method for a layer-twisted optical cable.

[0006] In order to solve the above technical problems, the technical solution of the layer-twisted optical cable provided by the present invention is implemented as follows:

[0007] A layer-stranded optical cable, comprising: a cable core, an inner sheath,

[0008] The cable core comprises a central reinforcement member, a plurality of loose tubes twisted around the central reinforcement member, and at least one optical fiber installed in the loose tubes, wherein the loose tubes are filled with fiber paste fillers.

[0009] Inner sheath, the inner sheath is wrapped around the cable core, and the inner sheath is filled with cable paste filler,

[0010] Among them: it also includes a metal protective layer, a mousetrap layer and an outer sheath arranged in sequence outside the inner sheath,

[0011] The metal protective layer is a metal mesh belt with spikes wrapped around the inner sheath.

[0012] The mouse-trapping glue layer is a mouse-trapping glue tape wrapped around the metal protective layer.

[0013] The outer sheath is wrapped outside the mousetrap glue layer, and the outer sheath contains a glass fiber mesh.

[0014] Furthermore, the metal mesh belt comprises a belt-shaped metal mesh, spikes and a flexible protective member, the belt-shaped metal mesh is provided with densely arranged spikes, and the spikes penetrate into the flexible protective member.

[0015] Furthermore, the flexible protective element is a flexible foam belt, or a flexible foam rubber-plastic belt, or a flexible rubber belt.

[0016] Furthermore, the strip-shaped metal mesh is a strip-shaped stainless steel mesh, and the spikes are steel wires tied to the strip-shaped metal mesh.

[0017] Furthermore, the mouse-trapping tape comprises a flexible flat sleeve and mouse-trapping glue arranged in the flexible flat sleeve.

[0018] Furthermore, the flexible flat sleeve is a nylon sleeve.

[0019] Furthermore, the cable core is wrapped with a water-blocking tape.

[0020] A method for making a layer-stranded optical cable, comprising the following steps:

[0021] S1: Coloring the optical fiber according to the existing production process, inserting at least one colored optical fiber into the loose tube and filling it with fiber paste, introducing the loose tube with the built-in optical fiber and the central reinforcement into the cable stranding machine for stranding to obtain a cable core, and extruding and wrapping the inner sheath outside the cable core according to the existing production process to obtain a conventional layer-stranded optical cable for standby use;

[0022] S2: prepare a metal mesh belt for standby use;

[0023] S3: prepare sticky tape for later use;

[0024] S4: wrapping the metal mesh tape prepared in step S2 around the conventional layer-stranded optical cable prepared in step S1, so that the metal mesh tape forms a metal protective layer outside the conventional layer-stranded optical cable;

[0025] S5: wrapping the sticky tape prepared in step S3 around the stranded optical cable with the metal protective layer prepared in step S4, so that the sticky tape forms a sticky layer outside the metal protective layer;

[0026] S6: inserting the optical cable produced in step S5 into an extruder, wrapping an outer sheath material outside the glue layer, and wrapping a ribbon-shaped glass fiber mesh outside the outer sheath material while the wrapped outer sheath material has not yet cooled and solidified, and then inserting the optical cable into the extruder again, wrapping the outer sheath material outside the glass fiber mesh, and then cooling and solidifying;

[0027] This completes the production of stranded optical cables.

[0028] Furthermore, in the step S2, when preparing the metal mesh belt, stainless steel wire, aluminum wire or other metal wire is used to weave a metal mesh belt, and steel wire is tied on the metal mesh belt to form spikes. Flexible protective parts such as flexible rubber belts or flexible foam belts or flexible foam rubber-plastic belts are pressed onto the side of the metal mesh that is tied with spikes, and all the spikes are inserted into the flexible protective parts to obtain the metal mesh belt, which is then coiled for standby use.

[0029] Further, in step S3, when preparing the sticky tape, the sticky tape is applied on the middle part of the surface of the strip nylon sheet along the length direction of the strip nylon sheet, and then the width direction of the strip nylon sheet is turned up from both sides to the middle, and the turned up sides completely cover the sticky tape, so that the strip nylon sheet forms a nylon sleeve with a flat structure, and the sticky tape is wrapped in the nylon sleeve. After sealing both ends of the nylon sleeve, the sticky tape is obtained, and the sticky tape is rolled up for standby use.

[0030] The beneficial effects of the present invention are:

[0031] 1. The rat-proof optical cable of the present invention has a metal protective layer, which adopts a metal mesh belt with spikes, which is wrapped around the optical cable, and a mouse-sticking glue layer is arranged outside the metal protective layer, which is also wrapped outside the metal protective layer, and an outer sheath is arranged outside the mouse-sticking glue layer, and the outer sheath contains a glass fiber mesh. The first rat-proofing can be achieved by the glass fiber mesh in the outer sheath. After the outer sheath is destroyed, the mouse-sticking glue in the mouse-sticking glue layer will stick to the mice and kill the mice, so as to achieve the second rat-proofing. After the mouse-sticking glue layer is destroyed, the metal protective layer can achieve the third rat-proofing, which can improve the mouse-proofing performance of the optical cable, effectively protect the optical fiber in the optical cable, and ensure stable communication.

[0032] 2. The metal protective layer of the present invention is a metal mesh belt with spikes, and the spikes penetrate into the flexible protective member, so as to facilitate the winding operation of the metal mesh belt and the winding and wrapping operation of the metal mesh belt and the optical cable, and has a simple structure and ingenious design.

[0033] 3. The mouse glue of the mouse sticky tape of the present invention is wrapped in a flexible flat sleeve. The mouse sticky glue has strong bonding force and poor fluidity. The flexible flat sleeve facilitates the winding operation of the mouse sticky tape and also facilitates the winding and wrapping operation. When a mouse gnaws an optical cable, if the flexible flat sleeve is broken, the mouse sticky glue will enter the mouse's mouth, causing the mouse to suffocate and die. At the same time, the exposed mouse sticky glue will also stick to the mouse and prevent it from escaping and being trapped to death, which can effectively prevent the mouse from further gnawing the optical cable.

[0034] 4. The preparation of the outer sheath of the present invention is to first extrude and wrap a layer of outer sheath material outside the mousetrap glue layer, and while the outer sheath material has not yet cooled and solidified, wrap a glass fiber mesh around the outer sheath material. Under the action of tension, the glass fiber mesh will be embedded in the unsolidified outer sheath material, and then extrude and wrap another layer of outer sheath material. At this time, the outer sheath material will enter the mesh of the glass fiber mesh, and then cool and solidify. After cooling and solidification, the glass fiber mesh is completely wrapped in the outer sheath material to form an outer sheath together with the outer sheath material. With this outer sheath structure, when being gnawed by mice, when the middle part of the outer sheath is broken, the mice will gnaw the glass fiber mesh, and the crushed glass fibers will hurt the oral cavity of the mice, making them feel afraid of the optical cable, thereby achieving a rat-proof effect, while the outer sheath is not gnawed through and still has a protective effect on the optical cable. Description of the drawings:

[0035] Figure 1 It is a structural schematic diagram of the present invention;

[0036] Figure 2 It is a schematic structural diagram of the metal mesh belt of the present invention;

[0037] Figure 3 It is a schematic structural diagram of the mouse sticky tape of the present invention. Specific implementation method:

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0039] like Figure 1 , Figure 2 and Figure 3 As shown, a layer-stranded optical cable comprises: a cable core 1, an inner sheath 2, a metal protective layer 4, a glue layer 5 and an outer sheath 6, wherein the cable core 1 has a central reinforcement member 11, a plurality of loose tubes 12 twisted around the central reinforcement member 11, and at least one optical fiber 13 installed in the loose tube 12, the loose tube 12 is filled with a fiber paste filler, the cable core 1 is wrapped with a water-blocking binding tape, the cable core 1 is wrapped with an inner sheath 2, the inner sheath 2 is filled with a cable paste filler 3, the inner sheath 2 is wrapped with a metal protective layer 4, the metal protective sheath is a metal mesh belt with spikes 42 wrapped around the inner sheath 2, the metal mesh belt has a band-shaped metal mesh 41, spikes 42 and a flexible protective member 43, the band-shaped metal mesh 41 is provided with densely arranged spikes 42, and the spikes 42 penetrate into the flexible protective member 43. The strip metal mesh 41 is a strip stainless steel mesh, and the spikes 42 are steel wires tied to the strip metal mesh 41. The flexible protective member 43 is a flexible foam belt, or a flexible foam rubber belt, or a flexible rubber belt. The metal protective sleeve is wrapped with a mouse-sticking glue layer 5, and the mouse-sticking glue layer 5 is a mouse-sticking glue tape wrapped around the metal protective layer 4. The mouse-sticking glue tape includes a flexible flat sleeve 51 and a mouse-sticking glue 52 arranged in the flexible flat sleeve 51. The flexible flat sleeve 51 is a nylon sleeve. The mouse-sticking glue layer 5 is wrapped with an outer sheath 6, and the outer sheath 6 contains a glass fiber mesh 7.

[0040] A method for cabling a layer-stranded optical cable, comprising the following steps:

[0041] S1: Coloring the optical fiber 13 according to the existing production process, inserting at least one colored optical fiber 13 into the loose tube 12 and filling it with fiber paste, introducing the loose tube 12 with the built-in optical fiber 13 and the central reinforcement 11 into the cable stranding machine for stranding, and obtaining the cable core 1, and extruding and wrapping the inner sheath 2 outside the cable core 1 according to the existing production process to obtain a conventional layer-stranded optical cable for standby use;

[0042] S2: prepare a metal mesh belt for standby use;

[0043] When preparing the metal mesh belt, stainless steel wire, aluminum wire or other metal wire is used to weave a strip metal mesh 41, and steel wire is tied on the strip metal mesh 41 to form spikes 42. Flexible protective parts 43 such as flexible rubber belts, flexible foam belts or flexible foam rubber-plastic belts are pressed onto the side of the metal mesh tied with the spikes 42, and the spikes 42 are all inserted into the flexible protective parts 43 to obtain a metal mesh belt, which is then coiled for standby use.

[0044] S3: prepare sticky tape for later use;

[0045] When preparing the sticky tape, the sticky tape 52 is applied to the middle of the surface of the strip-shaped nylon sheet along the length direction of the strip-shaped nylon sheet, and then the strip-shaped nylon sheet is turned up from both sides to the middle in the width direction, and the turned up sides completely cover the sticky tape 52, so that the strip-shaped nylon sheet forms a nylon sleeve with a flat structure, and the sticky tape 52 is wrapped in the nylon sleeve. After sealing both ends of the nylon sleeve, the sticky tape is obtained, and the sticky tape is rolled up for use.

[0046] S4: Wrapping the metal mesh tape prepared in step S2 around the conventional layer-stranded optical cable prepared in step S1, the metal mesh tape forms a metal protective layer 4 outside the conventional layer-stranded optical cable;

[0047] S5: wrapping the sticky tape prepared in step S3 around the stranded optical cable with the metal protective layer 4 prepared in step S4, so that the sticky tape forms a sticky layer 5 outside the metal protective layer 4;

[0048] S6: inserting the optical cable produced in step S5 into an extruder, wrapping the outer sheath 6 material outside the mouse glue layer 5, and wrapping the outer sheath 6 material with a ribbon-shaped glass fiber mesh 7 outside the outer sheath 6 material before it is cooled and solidified, and then inserting the optical cable into the extruder again, wrapping the outer sheath 6 material outside the glass fiber mesh 7, and then cooling and solidifying;

[0049] This completes the production of stranded optical cables.

[0050] It should be noted that the above-described embodiments are illustrative of the technical solution of the present invention rather than limiting. Equivalent substitutions made by ordinary technicians in the relevant technical field or other modifications made according to the prior art should be included in the scope of rights required by the present invention as long as they do not exceed the concept and scope of the technical solution of the present invention.

Claims

1. A layer-stranded optical cable, comprising: A cable core (1), wherein the cable core (1) comprises a central reinforcement member (11), a plurality of loose tubes (12) twisted around the central reinforcement member (11), and at least one optical fiber (13) inserted into the loose tubes (12), wherein the loose tubes (12) are filled with a fiber paste filler (14). An inner sheath (2), wherein the inner sheath (2) is wrapped around the cable core (1), and the inner sheath (2) is filled with a cable jelly filler (3). The invention is characterized in that it also comprises a metal protective layer (4), a mousetrap layer (5) and an outer sheath (6) which are sequentially arranged outside the inner sheath (2). The metal protective layer (4) is a metal mesh belt with spikes (42) wrapped around the inner sheath (2). The mouse-trapping glue layer (5) is a mouse-trapping glue tape wrapped around the metal protective layer (4). An outer sheath (6) is wrapped around the mousetrap layer (5), and a glass fiber mesh (7) is contained in the outer sheath (6).

2. The stranded optical cable according to claim 1, characterized in that: The metal mesh belt comprises a belt-shaped metal mesh (41), spikes (42) and a flexible protective member (43). The belt-shaped metal mesh (41) is provided with densely arranged spikes (42), and the spikes (42) penetrate into the flexible protective member (43).

3. The stranded optical cable according to claim 2, characterized in that: The flexible protective member (43) is a flexible foam belt, or a flexible foam rubber-plastic belt, or a flexible rubber belt.

4. The stranded optical cable according to claim 2, characterized in that: The strip-shaped metal mesh (41) is a strip-shaped stainless steel mesh, and the spikes (42) are steel wires tied to the strip-shaped metal mesh (41).

5. The stranded optical cable according to claim 1, characterized in that: The mouse-trapping tape comprises a flexible flat sleeve (51) and mouse-trapping glue (52) arranged in the flexible flat sleeve (51).

6. The stranded optical cable according to claim 5, characterized in that: The flexible flat sleeve (51) is a nylon sleeve.

7. The stranded optical cable according to claim 1, characterized in that: The cable core (1) is wrapped with a water-blocking tape.

8. The cabling method of a stranded optical cable according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: coloring the optical fiber (13) according to the existing production process, inserting at least one colored optical fiber (13) into a loose tube (12) and filling it with fiber paste, introducing the loose tube (12) with the built-in optical fiber (13) and the central reinforcement (11) into a twisting machine for twisting to obtain a cable core (1), and wrapping an inner sheath (2) outside the cable core (1) according to the existing production process to obtain a conventional layer-twisted optical cable for standby use; S2: prepare a metal mesh belt for standby use; S3: prepare sticky tape for later use; S4: wrapping the metal mesh tape prepared in step S2 around the conventional layer-stranded optical cable prepared in step S1, so that the metal mesh tape forms a metal protective layer (4) outside the conventional layer-stranded optical cable; S5: wrapping the sticky tape prepared in step S3 around the stranded optical cable with the metal protective layer (4) prepared in step S4, so that the sticky tape forms a sticky tape layer (5) outside the metal protective layer (4); S6: inserting the optical cable produced in step S5 into an extruder, wrapping the outer sheath (6) material outside the sticky glue layer (5), and while the wrapped outer sheath (6) material has not yet cooled and solidified, wrapping the outer sheath (6) material with a ribbon-shaped glass fiber mesh (7), then inserting the optical cable into the extruder again, wrapping the outer sheath (6) material outside the glass fiber mesh (7), and then cooling and solidifying; This completes the production of stranded optical cables.

9. The method for cabling a stranded optical cable according to claim 8, characterized in that: In the step S2, when preparing the metal mesh belt, stainless steel wire, aluminum wire or other metal wire is used to weave a belt-shaped metal mesh (41), and steel wire is tied on the belt-shaped metal mesh (41) to form spikes (42), and a flexible protective member (43) such as a flexible rubber belt or a flexible foam belt or a flexible foam rubber-plastic belt is pressed onto the side of the metal mesh that is tied with the spikes (42), and the spikes (42) are all inserted into the flexible protective member (43) to obtain the metal mesh belt, and the metal mesh belt is coiled for standby use.

10. The method for cabling a stranded optical cable according to claim 8, characterized in that: In the step S3, when preparing the mouse sticky tape, the mouse sticky glue (52) is applied to the middle of the surface of the strip-shaped nylon sheet along the length direction of the strip-shaped nylon sheet, and then the width direction of the strip-shaped nylon sheet is turned up from both sides to the middle, and the turned up sides completely cover the mouse sticky glue (52), so that the strip-shaped nylon sheet forms a nylon sleeve with a flat structure, and the mouse sticky glue (52) is wrapped in the nylon sleeve. After sealing the two ends of the nylon sleeve, the mouse sticky tape is obtained, and the mouse sticky tape is rolled up for standby use.

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