Underground flame-retardant detection optical cable

Abstract

The utility model discloses an underground flame-retardant detection optical cable, and relates to the technical field of optical cables. The optical cable comprises a cable sleeve and a plurality of optical fiber units arranged in the cable sleeve. The cable sleeve sequentially comprises a wear-resistant layer, an outer sheath layer, a porous filling layer, an aluminum film layer, a heat insulation layer, a woven mesh layer, a waterproof layer, an aramid fiber reinforcing layer, an inner sheath layer and a waterproof yarn wrapping layer from outside to inside. And the porous filling layer is filled with a flame retardant. According to the utility model, the aluminum film layer and the porous filling layer filled with the flame retardant are arranged outside the optical cable core, so that the flame-retardant effect of the whole optical cable is improved on the whole; and meanwhile, due to the arrangement of the aluminum film layer, after the wear-resistant layer and the outer sheath layer are damaged under flame, the aluminum film layer is used for heat insulation and film formation, so that the damage to the waterproof layer, the aramid fiber reinforcing layer, the inner sheath layer and the water-blocking yarn wrapping layer caused by high temperature and the damage to the optical fiber unit arranged in the cable sleeve caused by heat radiation are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical cables, in particular to a flame-retardant detection optical cable for underground use. Background Art

[0002] With the development of the telecommunications industry, the scope of services provided by my country's communications technology services industry has become increasingly broad. The scope of services provided by communications technology service providers has gradually expanded to include providing technical services for communications networks in industries such as the internet, radio and television networks, electricity, and transportation. With the acceleration of social informatization and the in-depth development of government and enterprise informatization, these changes have led to a continuous increase in demand for communications network technology services across various industries.

[0003] When working underground in coal mines, natural gas, etc., optical cables are needed to transmit communication signals underground so that workers underground can maintain communication and communicate with those on the ground. However, existing optical cables have the following defects when used to transmit signals in coal mines: existing ordinary optical cables are not flame retardant, and their use in coal mines poses a great safety hazard. Utility Model Content

[0004] The purpose of the utility model is to provide a flame-retardant detection optical cable for underground use, which solves the problems raised by the background technology by arranging an aluminum film layer and a porous filling layer filled with flame retardant on the outer side of the optical cable core.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The utility model is a flame-retardant detection optical cable for underground use, comprising a cable sleeve and a plurality of optical fiber units arranged in the cable sleeve; the cable sleeve comprises, from the outside to the inside, a wear-resistant layer, an outer sheath layer, a porous filling layer, an aluminum film layer, a heat-insulating layer, a woven mesh layer, a waterproof layer, an aramid reinforcement layer, an inner sheath layer, and a water-blocking yarn layer; the porous filling layer is filled with a flame retardant.

[0007] Furthermore, the optical fiber unit includes a loose tube, an optical fiber arranged in the loose tube, and fiber grease is filled between the loose tube and the optical fiber; 2-24 optical fiber units and a filling rope are twisted together, and water-blocking wire and filling grease are filled during twisting, and then wrapped with a water-blocking tape layer to form an optical cable core with a circular cross-section; the optical cable core is arranged in a cable sleeve.

[0008] Furthermore, the outer sheath layer and the inner sheath layer are both made of polyethylene material.

[0009] Furthermore, the flame retardant includes organic flame retardant, inorganic flame retardant and halogen flame retardant.

[0010] Furthermore, the woven mesh layer is selected from one of a plastic woven mesh layer, a Kevlar fiber woven mesh layer, a carbon fiber woven mesh layer and a metal wire woven mesh layer.

[0011] Furthermore, the porous filling layer is selected from a sponge layer, a polyurethane foam layer or a gauze layer.

[0012] The utility model has the following beneficial effects:

[0013] The utility model improves the flame retardant effect of the optical cable as a whole by arranging an aluminum film layer and a porous filling layer filled with flame retardant on the outside of the optical cable core; at the same time, the arrangement of the aluminum film layer can achieve heat insulation by utilizing the aluminum film layer when the wear-resistant layer and the outer sheath layer are destroyed under flame, thereby preventing high temperature from damaging the waterproof layer, the aramid reinforcement layer, the inner sheath layer, and the water-blocking yarn layer, and heat radiation from damaging the optical fiber unit arranged in the cable sheath.

[0014] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic diagram of the optical cable structure of the utility model;

[0017] Figure 2 for Figure 1 A partial enlarged view of point A in the middle. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0020] See also Figure 1-2As shown, the utility model is a flame-retardant detection optical cable for underground use, comprising a cable sheath 1 and 13 optical fiber units 2 arranged in the cable sheath 1. The 13 optical fiber units 2 and the filling rope 3 are twisted together, and are filled with water-blocking wire 4 and filling grease 5 during twisting. Then, a water-blocking tape layer 6 is wrapped around the twisting to form an optical cable core with a circular cross-section; the optical cable core is arranged in the cable sheath 1.

[0021] At the same time, in order to facilitate the application of the optical cable in coal mines and other mines, the provided cable sheath 1 includes, from the outside to the inside, a wear-resistant layer 10, an outer sheath layer 11, a porous filling layer 12, an aluminum film layer 13, a heat-insulating layer 14, a woven mesh layer 15, a waterproof layer 16, an aramid reinforcement layer 17, an inner sheath layer 18, and a water-blocking yarn layer 19; the porous filling layer 12 is filled with a flame retardant, so that when a fire occurs, the flame will destroy the wear-resistant layer 10 and the outer sheath layer 11, and when the porous filling layer 12 is exposed When exposed, the flame retardant prevents the spread of flames, thereby preventing combustion from damaging the waterproof layer 16, the aramid reinforcement layer 17, the inner sheath layer 18, and the water-blocking yarn layer 19; at the same time, the aluminum film layer 13 and the thermal insulation layer 14 are arranged to prevent heat radiation by the aluminum film layer 13 and to prevent heat transfer by the thermal insulation layer 14, thereby preventing the high temperature inside the optical fiber unit 2 caused by the high temperature of the environment from occurring, thereby preventing the high temperature from damaging the optical fiber unit 2.

[0022] Specifically, the porous filling layer 12 is made of a sponge layer, a polyurethane foam layer or a gauze layer. The porous filling layer 13 has a porous property, which facilitates filling and dispersing the flame retardant in the porous filling layer 12 .

[0023] The filler inside the optical cable core is filled with water-blocking wire 4 and filling paste 5, and a water-blocking tape layer 6 and a water-blocking yarn layer 19 are used outside the optical cable core. The water-blocking tape layer 9 and the water-blocking yarn layer 17 expand rapidly after absorbing water, preventing the expansion of moisture and improving the water-blocking performance of the optical cable.

[0024] At the same time, in the present invention, the braided mesh layer 15 is a metal wire braided mesh layer, which improves the structural strength of the cable sheath 1 to a certain extent, that is, improves the tensile strength of the cable sheath 1, and prevents the optical cable from breaking due to traction during the laying process; and a wear-resistant layer 10 is provided to prevent the outer sheath layer 11 from being damaged due to traction during the laying process.

[0025] In the above description, the optical fiber unit 2 includes a loose tube 20, an optical fiber 21 disposed in the loose tube 20, and a fiber paste 22 filled between the loose tube 20 and the optical fiber 21; and the outer sheath layer 11 and the inner sheath layer 18 are both made of polyethylene material.

[0026] The flame retardant is a compound of red phosphorus, aluminum hydroxide, expanded graphite and other inorganic flame retardants.

[0027] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0028] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, numerous modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A flame-retardant detection optical cable for underground use, characterized by: It comprises a cable sleeve (1) and a plurality of optical fiber units (2) arranged in the cable sleeve (1); The cable sheath (1) comprises, from the outside to the inside, a wear-resistant layer (10), an outer sheath layer (11), a porous filling layer (12), an aluminum film layer (13), a heat-insulating layer (14), a woven mesh layer (15), a waterproof layer (16), an aramid reinforcement layer (17), an inner sheath layer (18), and a water-blocking yarn layer (19); The porous filling layer (12) is filled with a flame retardant.

2. The flame-retardant detection optical cable for underground use according to claim 1, characterized in that: The optical fiber unit (2) comprises a loose tube (20), an optical fiber (21) arranged in the loose tube (20), and a fiber paste (22) is filled between the loose tube (20) and the optical fiber (21); 2-24 optical fiber units (2) and a filling rope (3) are twisted together, and a water-blocking wire (4) and a filling grease (5) are filled during the twisting process, and then a water-blocking tape layer (6) is wrapped around the fiber optic cable core to form a circular cross-section; The optical cable core is arranged in the cable sleeve (1).

3. The flame-retardant detection optical cable for underground use according to claim 1, characterized in that: The outer sheath layer (11) and the inner sheath layer (18) are both made of polyethylene material.

4. The flame-retardant detection optical cable for underground use according to claim 1, characterized in that: The flame retardant includes organic flame retardant, inorganic flame retardant and halogen flame retardant.

5. The flame-retardant detection optical cable for underground use according to claim 1, characterized in that: The woven mesh layer (15) is selected from one of a plastic woven mesh layer, a Kevlar fiber woven mesh layer, a carbon fiber woven mesh layer and a metal wire woven mesh layer.

6. The flame-retardant detection optical cable for underground use according to claim 1, characterized in that: The porous filling layer (12) is selected from a sponge layer, a polyurethane foam layer or a gauze layer.

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