Self-lubricating ultra-long-distance air-blowing optical cable

Abstract

The utility model discloses a self-lubricating ultra-long-distance air-blowing optical cable, belongs to the technical field of cables, and solves the problems that in ultra-long-distance air-blowing optical cable laying construction, the lubricating effect of a lubricating grease layer is weakened or disappears due to an overlong distance, air-blowing construction is hindered by friction force, and the air-blowing laying quality of an optical cable product is reduced. The optical cable comprises a sheath which is internally provided with an optical fiber assembly. The outer surface of the sheath is coated with a paste lubricating grease layer and an outer protection layer from inside to outside. Wherein a plurality of leakage holes are evenly formed in the outer protection layer, and the ends, located on the outer surface of the outer protection layer, of the leakage holes are covered with covering pieces; and the leakage holes are used for allowing the paste lubricating grease layer to overflow from the leakage holes to the outer surface of the outer protection layer after the covering piece is removed during optical cable laying. The self-lubricating cable is used for ultra-long-distance air-blowing laying of optical cables, can be self-lubricated for a long time, effectively reduces friction, and improves construction quality.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology, specifically relating to a self-lubricating ultra-long-distance air-blown optical cable. Background Technology

[0002] Air-blown fiber optic cable laying is a highly efficient and safe method for laying fiber optic cables. It uses high-pressure gas to blow the fiber optic cable into a pre-laid silicon core tube communication duct. The specific construction process is as follows: During the cable laying process, the fiber optic cable is simultaneously subjected to the traction force of the traction device, the blowing force of compressed air, and the pushing force of the conveyor belt. An air compressor generates compressed air, which is delivered to the sealed chamber of the cable blower through a flexible air hose. The lead-out end of the silicon core tube is connected to the sealed chamber of the cable blower. The traction device, along with the fiber optic cable, is placed inside the duct. The rubber surrounding the traction device is sealed to the inner wall of the duct, forming a sealed container that communicates with the sealed chamber of the cable blower. Thus, the high-pressure airflow pushes the air-sealed piston, which, connected to the end of the fiber optic cable, creates a settable, uniform tension on the cable. Simultaneously, the hydraulic crawler conveyor mechanism of the cable blower clamps the fiber optic cable and transports it forward, creating a conveying force. The combination of tension and conveying force allows the inserted fiber optic cable to travel rapidly through the duct in a suspended state, accompanied by the high-speed airflow.

[0003] Conventional air-blown optical cables have a small outer diameter and a surface material with a certain hardness and low coefficient of friction. In the existing technology, when laying air-blown optical cables, a grease layer is applied to the outer surface to ensure the smooth progress of the construction. However, this structure has the following disadvantages: 1) the grease is not applied evenly; 2) the lubrication effect weakens or disappears after air blowing for a certain length. For ultra-long-distance construction with a single air blowing length of 1000 to 1500m, the above defects are particularly obvious. Utility Model Content

[0004] The purpose of this utility model is:

[0005] To address the issue that the lubrication effect of the grease layer weakens or disappears due to the excessive distance during the installation of ultra-long-distance air-blown optical cables, and that friction hinders air-blowing construction, thus reducing the quality of air-blown optical cable installation, a self-lubricating ultra-long-distance air-blown optical cable is provided.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A self-lubricating ultra-long-distance air-blown optical cable includes a sheath with an internal optical fiber assembly, and the outer surface of the sheath is covered with a paste-like lubricating grease layer and an outer protective layer from the inside to the outside.

[0008] The outer protective layer has multiple leakage holes evenly distributed on it, and a cover is provided on one end of the outer surface of the outer protective layer where the leakage holes are located.

[0009] The leakage hole is used for allowing the paste grease layer to overflow from the leakage hole to the outer surface of the outer protective layer after the covering member is removed during the optical cable laying.

[0010] Further, the covering member is a wax covering member, which is used for removing and exposing the end surface of the leakage hole from the outer protective layer by relative movement with the optical cable.

[0011] Further, a uniform isolation component is arranged between the outer protective layer and the sheath layer, which separates the paste grease layer to form a plurality of mutually isolated lubricating sections.

[0012] Further, the sheath is composed of PE material, and a cable core water-blocking material layer is arranged in the sheath and filled in the gap between the sheath and the optical cable component.

[0013] Further, a reinforcing member is arranged at the central axis of the sheath, and a cushion layer is arranged on the outer surface of the reinforcing member.

[0014] A plurality of optical fiber components are uniformly arranged around the central axis of the central sheath, and the cushion layer is attached to the outer surface of each optical cable component.

[0015] Further, the reinforcing member is composed of non-metallic material, and the cushion layer is composed of PE material.

[0016] Further, the optical fiber component comprises, from outside to inside, a loose tube, a fiber paste and an optical fiber.

[0017] Therefore, the self-lubricating air-blowing optical cable has the advantages that:

[0018] The self-lubricating air-blowing optical cable mainly comprises an air-blowing optical cable and a self-lubricating outer layer, the self-lubricating layer comprises a paste grease layer, an outer protective layer and a leakage hole arranged on the outer protective layer, and a covering member is arranged outside the leakage hole; the small hole is blocked by the covering member during the production of the optical cable, so that the grease does not overflow; during the air-blowing laying, the covering member outside the leakage hole can be removed by dragging, and the paste grease in the semi-solid state slowly overflows to the outer surface from the leakage hole, so that the lubricating effect can be continuously achieved in the construction of the super-long distance, and the friction encountered in the construction is reduced; compared with the optical cable product in the prior art, the optical cable in the utility model can obtain a longer air-blowing distance under the condition of the same construction tool, and the quality of the optical cable in the air-blowing laying construction of the super-long distance is effectively ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a cross-sectional structure schematic view of the optical cable of the utility model;

[0020] Figure 2 FIG. 4 is a structure schematic view of the uniform isolation component of the utility model.

[0021] Marked in the figure: 1 - sheath, 2 - paste lubricating layer, 3 - outer protective layer, 4 - leakage hole, 5 - covering piece, 6 - uniform isolation assembly, 7 - cable core water-blocking material layer, 8 - reinforcing member, 9 - cushion layer, 10 - optical fiber assembly. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0023] The utility model discloses a kind of self-lubricating super-long distance air-blowing optical cable, especially suitable for 1000~1500m single air-blowing length super-long distance air-blowing construction, the optical cable specifically includes the sheath 1 with optical fiber assembly 10 inside;The outer surface of sheath 1 is covered with paste lubricating layer 2 and outer protective layer 3 from inside to outside;

[0024] Among them, outer protective layer 3 is uniformly provided with a plurality of leakage holes 4, and covering piece 5 is arranged on one end of the outer surface of outer protective layer 3 covering the leakage holes 4;Leakage holes 4 are used to allow paste lubricating layer 2 to overflow from leakage holes 4 to the outer surface of outer protective layer 3 after removing covering piece 5 when optical cable is laid.

[0025] When optical cable is produced, covering piece 5 is used to block small holes, and tray can ensure that lubricating grease does not overflow;When air-blowing laying, covering piece 5 outside leakage holes 4 can be removed by dragging, and semi-solid paste lubricating grease slowly overflows to the outer surface from leakage hole, which can continuously play a lubricating role in super-long distance construction and reduce friction encountered in construction;Compared with the prior art optical cable product, the optical cable of the utility model can obtain longer air-blowing distance under the condition of the same construction tool, and effectively guarantees the quality of optical cable in super-long distance air-blowing laying construction. As a preferred embodiment, outer protective layer 3 should be set as a thin layer with smaller thickness than the protective layer of the prior art optical cable, so that lubricating grease is more easily leaked out when air-blowing laying.

[0026] Preferably, covering piece 5 is a wax covering piece 5, which is used to remove and expose the end face of leakage hole 4 from outer protective layer 3 by relative movement with optical cable. Wax covering piece 5 can adhere to outer protective layer 3 by its own physical properties to cover and block leakage hole 4, avoid internal lubricating grease from leaking out of leakage hole 4 when optical cable is trayed, and can be more easily detached from the surface of outer protective layer 3 when removed, which facilitates the operation of staff and improves work efficiency.

[0027] Preferably, the outer protective layer 3 is provided with a uniform isolation component 6 between the sheath 1 layer, which separates the paste grease layer 2 into multiple isolated lubricating sections. The uniform isolation component 6 can make the internal paste grease layer 2 form multiple small sections of lubricating sections that are not connected to each other. Even if some section of the paste grease layer completely overflows during construction, the lubricating effect of other regional sections can be ensured, thereby reducing the impact on construction.

[0028] Preferably, the sheath 1 is composed of PE material, and the sheath 1 is internally filled with a cable core water-blocking material layer 7, which is filled in the gap between the sheath 1 and the optical cable assembly. The cable core water-blocking material layer 7 can prevent water from penetrating into the internal sheath 1 layer after the grease is discharged, thereby effectively avoiding affecting the normal work of the internal optical fiber assembly 10.

[0029] Preferably, the sheath 1 is provided with a reinforcing member 8 at the center axis, and the outer surface of the reinforcing member 8 is covered with a cushion layer 9; the optical fiber assembly 10 is uniformly provided around the center axis of the center sheath 1, and the cushion layer 9 is attached to the outer surface of each optical cable assembly. The reinforcing member 8 located at the center of each optical fiber assembly 10 can provide support for each optical fiber assembly 10, so that the optical fiber assembly 10 always remains in its fixed position and is not affected by external forces to shift or misalign.

[0030] As a preferred embodiment, the reinforcing member 8 is composed of non-metallic material, which can avoid affecting the optical fiber assembly 10 compared to metal material, and the cushion layer 9 is composed of PE material, which ensures that it will not be excessively squeezed under good contact adjustment and avoid damaging the optical fiber.

[0031] Preferably, the optical fiber assembly 10 comprises, from outside to inside, a loose tube, a grease and an optical fiber. Specifically, the loose tube is a tube for protecting the optical fiber from internal stress and external lateral pressure, which can be made of high molecular materials such as polypropylene (PP) or nylon (PA). In the optical cable, the optical fiber can be placed loosely in the loose tube, so as to avoid the optical fiber from being subjected to excessive mechanical stress or damage. The loose tube enables the optical fiber to maintain stable transmission performance during the laying and use of the optical cable. The grease is an oil paste filled in the loose tube, which is mainly composed of base oil (composed of natural oil and synthetic oil), inorganic filler, thickening agent, adjusting agent, antioxidant and other substances mixed in a certain proportion.

[0032] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A self-lubricating ultra-long haul blown optical cable characterized in that, The sheath is internally provided with a fiber assembly, and the outer surface of the sheath is externally provided with a greasy lubricating layer and an outer protective layer from inside to outside; The outer protective layer is uniformly provided with a plurality of leakage holes, and the end surface of the leakage hole on the outer surface of the outer protective layer is covered with a covering piece; The leakage hole is used to allow the greasy lubricating layer to overflow from the leakage hole to the outer surface of the outer protective layer after the covering piece is removed during the laying of the optical cable.

2. The self-lubricating, ultra-long haul gas-blown optical cable of claim 1, wherein, The covering piece is a waxy covering piece, which is used to remove and expose the end surface of the leakage hole from the outer protective layer by relative movement with the optical cable.

3. The self-lubricating, ultra-long haul gas-blown optical cable of claim 1, wherein, The outer protective layer and the sheath layer are provided with a uniform isolation assembly, which separates the greasy lubricating layer to form a plurality of mutually isolated lubricating sections.

4. The self-lubricating, ultra-long haul gas-blown optical cable of claim 1, wherein, The sheath is composed of PE material, and the sheath is internally filled with a cable core water-blocking material layer, which is filled in the gap between the sheath and the optical cable assembly.

5. The self-lubricating, ultra-long haul gas-blown optical cable of claim 1, wherein, A reinforcing piece is arranged at the center axis of the sheath, and the outer surface of the reinforcing piece is externally provided with a cushion layer. The fiber assembly is uniformly arranged around the center axis of the center sheath, and the cushion layer is attached to the outer surface of each optical cable assembly.

6. A self-lubricating, ultra-long haul gas-blown optical cable according to claim 5, characterized in that, The reinforcing piece is composed of a non-metallic material, and the cushion layer is composed of a PE material.

7. The self-lubricating, ultra-long-haul, blowable optical cable of claim 1, wherein, The fiber assembly comprises a ferrule, a fiber grease and an optical fiber arranged from outside to inside.

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