Novel bending-resistant, temperature-resistant, tensile and compression-resistant special optical cable
By introducing stainless steel belt-wrapped metal compressed layer, aramid fiber braided reinforcement layer and aramid fiber outer layer into the optical cable, the problem of easy damage to the optical cable during high temperature and high pressure and during the use of coal miners is solved, and the bending and extrusion resistance of the optical cable is achieved. It is suitable for the welding of downhole photoelectric composite cables of coal miners.
Patent Information
- Application Number
- CN202422319963.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-20
AI Technical Summary
Existing optical cables are prone to deformity under high temperature and high pressure environments, and are not resistant to bending and extrusion during use of coal mining machines, resulting in failure of the photoelectric composite cable.
A special optical cable is designed from the inside to the outside, including a 6-core tightly wrapped colored optical fiber, a metal compressive layer, a braided reinforcement layer and an outer tensile fiber layer. The metal compressive layer is a spiral tube wrapped in stainless steel strips. The braided reinforcement layer is woven aramid fiber, and the outer tensile fiber layer is aramid or nylon fiber. There is a moving gap between the tightly wrapped colored optical fiber and the metal compressive layer, and the oil paste is filled with oil paste.
It realizes the stability of the optical cable in a high temperature and high pressure environment and has good bending and extrusion resistance. It is suitable for the welding of downhole photoelectric composite cables of coal mining machines, and improves the reliability of the optical cable.
Smart Images
Figure CN223217715U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical cables, in particular to a new type of special optical cable that is resistant to bending, temperature, tension and compression. Background Art
[0002] The main obstacle to the current application of shearer optical fiber cables in coal mines is the poor reliability of the cables. This is primarily due to two factors. First, during the cable manufacturing process, shearer cables are sheathed in a steam-cured pipe, where temperatures can reach 180-200°C and pressures can reach 1.0-1.6 MPa for 0.5-1.5 hours. Under these conditions, ordinary optical cables deform and their fiber coatings detach, significantly reducing transmission performance. Second, during use, shearer cables are frequently bent, dragged, and squeezed. Due to their poor bending and squeezing resistance, ordinary optical cables are prone to fiber breakage. Once a break occurs, the optical fiber cable becomes ineffective. Currently, there is a lack of suitable optical fiber cables on the market for manufacturing shearer optical fiber cables. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a new type of special optical cable that is resistant to bending, temperature, tension and compression, which is suitable for welding optical fiber composite cables in coal mining machines and also has good anti-extrusion and anti-bending properties.
[0004] In order to solve the above problems, the present invention adopts the following technical solutions:
[0005] The utility model provides a new type of special optical cable that is resistant to bending, temperature, tension and compression. From the inside to the outside, it includes 6 cores of tightly wrapped colored optical fibers, a metal pressure-resistant layer, a braided reinforcement layer, a corrosion-resistant layer and an outer tensile fiber layer;
[0006] Among them, the metal pressure-resistant layer is a spiral tubular structure formed by winding stainless steel belts, the braided reinforcement layer is a mesh braided layer of aramid fiber tightly woven on the outside of the metal pressure-resistant layer by a horizontal braiding machine, and the outer tensile fiber layer is woven from aramid fiber or nylon fiber. A movable gap is left between the metal pressure-resistant layer and the 6-core tightly wrapped colored optical fiber.
[0007] Preferably, the braided reinforcement layer and the outer tensile fiber layer both adopt a para-aramid fiber braided structure made by reducing para-phenylenediamine and terephthaloyl chloride.
[0008] Preferably, the para-aramid fiber braided structure is formed by cross-braiding right-hand-twisted aramid reinforcing fiber lines, and the braiding pitch is 10-20 mm.
[0009] Preferably, the tight-clad colored optical fiber consists of a single-mode optical fiber and a temperature-resistant tight cladding layer coated on the outside of the single-mode optical fiber, and the outer diameter of the temperature-resistant tight cladding layer is 0.6±0.1 mm.
[0010] Preferably, the corrosion-resistant layer is made of fluoroplastic, and filling grease is provided in the movable gap.
[0011] The beneficial effects of the present invention are:
[0012] On the one hand, the utility model provides a tightly wrapped colored optical fiber consisting of a single-mode optical fiber and a temperature-resistant tight wrapping layer in the cable core. The single-mode optical fiber has excellent bending resistance and meets the design requirements of the optical cable's anti-bending performance. On the other hand, a movable gap is left between the tightly wrapped colored optical fiber and the metal pressure-resistant layer outside the utility model, and the optical fiber has sliding space. Therefore, it can effectively make the optical cable have good anti-bending and anti-extrusion effects. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;
[0014] Figure numerals: 1-single-mode optical fiber, 2-temperature-resistant tight cladding, 3-metal pressure-resistant layer, 4-braided reinforcement layer, 5-corrosion-resistant layer, 6-outer tensile fiber layer, 7-filling grease. DETAILED DESCRIPTION
[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0016] Example 1
[0017] The utility model provides a new type of special optical cable that is resistant to bending, temperature, tension and compression. From the inside to the outside, it includes 6 cores of tightly wrapped colored optical fibers, a metal pressure-resistant layer 3, a braided reinforcement layer 4, a corrosion-resistant layer 5 and an outer tensile fiber layer 6;
[0018] Among them, the metal pressure-resistant layer 3 is a spiral tubular structure formed by winding a stainless steel belt, the braided reinforcement layer 4 is a mesh braided layer of aramid fiber tightly woven on the outside of the metal pressure-resistant layer 3 by a horizontal braiding machine, and the outer tensile fiber layer 6 is woven with aramid fiber or nylon fiber. A movable gap is left between the metal pressure-resistant layer and the 6-core tightly wrapped colored optical fiber.
[0019] In this embodiment, both the braided reinforcement layer 4 and the outer tensile fiber layer 6 utilize a para-aramid fiber braid structure, which is made from p-phenylenediamine and terephthaloyl chloride. This para-aramid fiber braid is constructed using a set of 16 spindles of aramid reinforcing fiber strands, each with a right-hand twist of 60 and a linear density of 1000. These strands are cross-woven on a 16-spindle braiding machine, with a braid pitch strictly controlled within the range of 10-20 mm.
[0020] In this embodiment, the para-aramid fiber braided structure is formed by cross-braiding right-hand-twisted aramid reinforcing fiber threads, and the braiding pitch is 10-20 mm.
[0021] In this embodiment, the tight colored optical fiber is composed of a single-mode optical fiber 1 and a temperature-resistant tight cladding layer 2 coated on the outside of the single-mode optical fiber 1. The outer diameter of the temperature-resistant tight cladding layer 2 is 0.6±0.1 mm.
[0022] In this embodiment, the corrosion-resistant layer 5 is made of fluoroplastic, and a filling grease 7 is provided in the movable gap.
[0023] The specific optical cable parameters are shown in the following table
[0024]
[0025] The new type of special optical cable that is resistant to bending, heat, tension and compression in the utility model is easy to be peeled off for cable welding due to the presence of a movable gap during underground operation. At the same time, a filling grease 7 is provided in the movable gap to enable the internal optical fiber to slide in a timely manner, so that the optical cable itself has good anti-extrusion and anti-bending properties. In addition, the material of the corrosion-resistant layer is fluoroplastic, which is heat-resistant, cold-resistant, weather-resistant, chemical-resistant, solvent-resistant, and has excellent insulation and high-frequency electrical properties. It also has the characteristics of non-drying, self-lubricating, low friction coefficient, etc., and can more comprehensively protect the internal optical fiber.
[0026] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.
Claims
1. A new type of special optical cable with bending resistance, temperature resistance, tension resistance and compression resistance, characterized by: From the inside to the outside, it includes 6-core tight-packed colored optical fibers, a metal compression layer, a braided reinforcement layer, a corrosion-resistant layer, and an outer tensile fiber layer; Among them, the metal pressure-resistant layer is a spiral tubular structure formed by winding stainless steel belts, the braided reinforcement layer is a mesh braided layer of aramid fiber tightly woven on the outside of the metal pressure-resistant layer by a horizontal braiding machine, and the outer tensile fiber layer is woven from aramid fiber or nylon fiber. A movable gap is left between the metal pressure-resistant layer and the 6-core tightly wrapped colored optical fiber.
2. A new type of special optical cable with bending resistance, temperature resistance, tension resistance and compression resistance according to claim 1, characterized in that: The braided reinforcement layer and the outer tensile fiber layer both adopt a para-aramid fiber braided structure made by reducing para-phenylenediamine and terephthaloyl chloride.
3. The novel special optical cable with bending resistance, temperature resistance, tension resistance and compression resistance according to claim 2 is characterized in that: The para-aramid fiber braided structure is formed by cross-braiding right-hand-twisted aramid reinforcing fiber lines, and the braiding pitch is 10-20 mm.
4. The novel special optical cable with bending resistance, temperature resistance, tension resistance and compression resistance according to claim 1 is characterized in that: The tight-clad colored optical fiber consists of a single-mode optical fiber and a temperature-resistant tight cladding layer coated outside the single-mode optical fiber, and the outer diameter of the temperature-resistant tight cladding layer is 0.6±0.1 mm.
5. The novel special optical cable with bending resistance, temperature resistance, tension resistance and compression resistance according to claim 1 is characterized in that: The corrosion-resistant layer is made of fluoroplastic, and filling grease is provided in the movable gap.