Sensing compression-resistant indication optical cable for mine

Abstract

The utility model relates to a mining sensing compression-resistant indication optical cable, which comprises a sheath layer. The skeleton layer is arranged in the sheath layer, the skeleton layer is made of a carbon fiber material and is internally provided with a cable core, the cross section of the skeleton layer is in a polygonal star shape, the polygonal star shape comprises a plurality of sharp-corner protrusions and sharp-corner grooves, and the sharp-corner protrusions abut against the inner wall of the sheath layer; the air bag is embedded in the center of the framework layer; the skeleton layer is made of a carbon fiber material and has good self-repairing capability, so that the anti-pressure capability of the optical cable is improved, and the air bag in the skeleton layer can also reduce the risk that the optical fiber is extruded and damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of optical cable, especially refers to a mine sensing compression indicating optical cable. BACKGROUND

[0002] With the continuous upgrading of global communication network construction, the optical cable market puts forward new requirements for the research and development of optical cables in terms of environmental adaptability, line safety and maintenance convenience, which promotes the continuous breakthrough of the research and development of new cables.

[0003] In the mine environment, heavy equipment and rock movement often occur in the mine, and the optical cable is easily subjected to extrusion, stretching or bending. When the pressure received by the conventional optical cable exceeds the ultimate compression resistance of the optical cable itself, the appearance will appear concave and other irreparable damage. The optical fiber signal transmission is also affected, and in serious cases, the optical fiber will be broken. At present, most optical cables increase the thickness and number of the sheath to improve the compression resistance, such as increasing the armor layer. The common armor layer is generally a steel belt armor. Although this kind of armor layer can provide high compression resistance, the cost of steel wire armor is relatively high, and it also increases the overall weight of the optical cable, which is not conducive to long-distance transportation and laying.

[0004] Moreover, the personnel outside the well cannot perform real-time early warning on the situation in the mine through the optical cable. When a fire, tower defense or other dangerous event occurs, the personnel in distress often miss the best rescue time due to the untimely warning. SUMMARY

[0005] Therefore, the utility model wants to solve the technical problem of overcoming the problem that the conventional optical cable in the prior art will produce irrecoverable concave when subjected to ultimate pressure, resulting in the influence of optical fiber signal transmission, and further provides a mine sensing compression indicating optical cable, which has good self-repairing ability, thereby improving the compression resistance of the optical cable and reducing the risk of optical fiber damage caused by extrusion.

[0006] To solve the above technical problems, the utility model provides a mine sensing compression indicating optical cable, comprising,

[0007] a sheath layer;

[0008] a skeleton layer arranged in the sheath layer, the skeleton layer is composed of carbon fiber material and internally provided with a cable core, the cross section of the skeleton layer is a multi-angle star shape, the multi-angle star shape comprises a plurality of sharp corner protrusions and sharp corner grooves, and the sharp corner protrusions abut against the inner wall of the sheath layer;

[0009] an air bag embedded in the center position of the skeleton layer.

[0010] In an embodiment of the utility model, it further comprises a temperature sensing optical fiber and a pressure sensing optical fiber arranged in the sharp corner groove.

[0011] In an embodiment of the present application, the sheath layer is made of a composite material composed of polyethylene and low-smoke halogen-free.

[0012] In an embodiment of the present application, the light-emitting unit further comprises a light-emitting optical fiber and an outer sheath covering the light-emitting optical fiber.

[0013] In an embodiment of the present application, the outer surface of the outer sheath is covered with a flame-retardant PVC material, and the flame-retardant PVC material is uniformly distributed with fluorescent material.

[0014] In an embodiment of the present application, the outer surface of the outer sheath is provided with a direction indicating mark, and the direction indicating mark points to one end of the light-emitting optical fiber connected to the light source.

[0015] In an embodiment of the present application, the light-emitting unit further comprises an inner sheath composed of transparent nylon material, the inner sheath covers the light-emitting optical fiber, and the outer sheath covers the inner sheath.

[0016] In an embodiment of the present application, the light-emitting unit further comprises a steel strand reinforcing member embedded between the outer sheath and the inner sheath.

[0017] In an embodiment of the present application, a plurality of cable cores are uniformly distributed around the air bag.

[0018] In an embodiment of the present application, the cross section of the framework layer is hexagonal star-shaped, and the sharp corner groove is obtuse.

[0019] In an embodiment of the present application, the sharp corner protrusion is acute.

[0020] In an embodiment of the present application, the light-emitting unit is arranged on the inner surface of the sheath layer.

[0021] In an embodiment of the present application, it further comprises two temperature sensing optical fibers.

[0022] In an embodiment of the present application, it further comprises two pressure sensing optical fibers.

[0023] In an embodiment of the present application, the cable core comprises a sleeve and an optical fiber arranged inside the sleeve, and the sleeve is filled with fiber paste.

[0024] In an embodiment of the present application, it further comprises a laser light-emitting light source connected to one end of the light-emitting optical fiber through an optical fiber connection fiber.

[0025] In one embodiment of the utility model, the optical fiber connecting fiber is provided with an FC connector at one end relative to the emitting optical fiber, and the FC connector is connected with the laser emitting light source.

[0026] In one embodiment of the utility model, the inner wall of the sheath layer and the sharp corner groove form a closed gap.

[0027] In one embodiment of the utility model, the skeleton layer is composed of carbon fiber material.

[0028] Compared with the prior art, the above technical scheme of the utility model has the following beneficial effects:

[0029] The mine sensing compression-resistant indicating optical cable has the following advantages: when the optical cable is subjected to a large impact force, the sharp corner groove can buffer and weaken the impact force, the sharp corner protrusion can support the sheath layer, and the compression resistance of the optical cable is increased; the skeleton layer composed of carbon fiber material has good elasticity, and can realize rapid self-repairing of the sheath layer after compression; when the optical cable is subjected to a large pressure, the gas in the air bag is extruded out of the skeleton layer, and a larger avoiding space is provided for the cable core, so that the risk of damage of the optical fiber is reduced, and the compression resistance of the optical cable is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to make the content of the utility model more easily understood, the utility model will be further described in detail below according to the specific embodiments of the utility model and in combination with the drawings, in which

[0031] Figure 1 It is a sectional structure schematic view of the mine sensing compression-resistant indicating optical cable in the preferred embodiment of the utility model;

[0032] Figure 2 It is a sectional structure schematic view of the mine sensing compression-resistant indicating optical cable in the preferred embodiment of the utility model; Figure 1

[0033] It is a sectional structure schematic view of the mine sensing compression-resistant indicating optical cable in the preferred embodiment of the utility model; Figure 3 Figure 1 It is a sectional structure schematic view of the mine sensing compression-resistant indicating optical cable in the preferred embodiment of the utility model.

[0034] The description of the drawings of the utility model is as follows: 1, sheath layer; 2, skeleton layer; 3, air bag; 4, sensing optical fiber unit; 5, sleeve; 6, fiber paste; 7, optical fiber; 8, steel strand reinforcing member; 9, inner sheath; 10, emitting optical fiber; 11, outer sheath; 12, sensing optical fiber unit; 13, optical cable cable body; 14, emitting unit; 15, direction indicating mark; 16, fusion joint of optical fiber connecting fiber and emitting optical fiber; 17, connecting fiber; 18, FC connector; 19, laser emitting light source; 20, sharp corner protrusion; 21, sharp corner groove. DETAILED DESCRIPTION ​

[0035] The utility model will be further described below in combination with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0036] Referring to Figure 1 As shown in the utility model in one embodiment, a kind of mine sensing compression indicating optical cable is disclosed, comprising,

[0037] Sheath layer 1;

[0038] Framework layer 2, it is arranged in the sheath layer 1, the framework layer 2 is composed of carbon fiber material and is internally provided with cable core, the cross section of the framework layer 2 is multiangular star, the multiangular star includes multiple sharp angle protrusions 20 and sharp angle grooves 21, and the sharp angle protrusion 20 is in abutment with the inner wall of the sheath layer 1;

[0039] Air bag 3, it is embedded in the center position of the framework layer 2.

[0040] The mine sensing compression indicating optical cable described in the embodiment, because air bag 3 is arranged in framework layer 2, when optical cable cable body 13 is subjected to greater impact force, the gas inside air bag 3 is extruded to the outside of framework layer 2, so that the inside of framework layer 2 is vacated to larger avoiding space for the cable core to move to the center of framework layer 2, to avoid that impact force crushes cable core, improves the compression resistance of optical cable, and guarantees normal transmission of optical fiber signal;Framework layer 2 is carbon fiber material, not only light in weight, convenient to transport and lay, but also has excellent elasticity, can buffer impact force, further improves the compression resistance of optical cable, sharp angle groove 21 on the surface of framework layer 2 plays the role of buffering and weakening impact force, sharp angle protrusion 20 plays the role of supporting sheath layer 1, when impact force is removed, sharp angle protrusion 20 can slowly recover, and self-repairs sheath layer 1.

[0041] Referring to Figure 1 As shown in the utility model in one embodiment, it further includes temperature sensing fiber and pressure sensing fiber arranged in the sharp angle groove 21, for assisting personnel outside the well to perceive temperature and pressure change in the well in real time, and early warning geological disasters such as collapse and gas leakage, and the temperature sensing fiber and pressure sensing fiber are compounded in optical cable cable body 13, which can also reduce the need for external wiring.

[0042] Further, the sheath layer 1 is set to be composite material composed of polyethylene (PE) and low-smoke zero-halogen (LSZH), and the low-smoke zero-halogen material is low-smoke and non-toxic when on fire, avoids releasing harmful gas during fire, and ensures the safety of personnel in the well;Polyethylene provides wear resistance, and adapts to the corrosive environment of mine.

[0043] Referring to Figure 1As shown, the cable further comprises a light-emitting unit 14 embedded between the sheath layer 1 and the framework layer 2, the light-emitting unit 14 further comprises a light-emitting optical fiber 10 and an outer sheath 11 covering the light-emitting optical fiber 10, the light-emitting optical fiber 10 can emit flashing light after being connected to a light source, which plays a role of exploration, mutual contact, determination of personnel position, direction guidance and the like for mine rescue personnel when working underground.

[0044] Further, the outer surface of the outer sheath 11 is covered with flame-retardant PVC material, which enhances the fireproof performance, and the flame-retardant PVC material is uniformly distributed with fluorescent material, which emits light in a dark environment, thereby improving the visibility of the optical cable.

[0045] Referring to Figure 1 As shown, further, the outer surface of the outer sheath 11 is provided with a direction indicating mark 15, which points to one end of the light-emitting optical fiber 10 connected to the light source, can clearly indicate the connection direction of the optical cable, reduce the laying error, shorten the installation time, and also can indicate the direction of the wellhead for rescue personnel and workers, improve the safety of operation.

[0046] Further, the direction indicating mark 15 is provided as an arrow.

[0047] Referring to Figure 1 As shown, further, the light-emitting unit 14 further comprises an inner sheath 9 composed of transparent nylon material, the inner sheath 9 covers the light-emitting optical fiber 10, and the outer sheath 11 covers the inner sheath 9, the transparent nylon ensures that the brightness of the light-emitting optical fiber 10 does not attenuate, and at the same time provides effective mechanical protection.

[0048] Referring to Figure 1 As shown, further, the light-emitting unit 14 further comprises a steel strand reinforcing member 8 embedded between the outer sheath 11 and the inner sheath 9, the steel strand reinforcing member 8 is mainly composed of a plurality of steel wires twisted together, the steel strand reinforcing member 8 is parallel to the optical cable body 13, and the steel strand can improve the tensile strength of the optical cable body 13 and the light-emitting unit 14, and prevent structural deformation due to stretching during laying.

[0049] Referring to Figure 1 As shown, further, a plurality of the cable cores are uniformly distributed around the air bag 3, so as to avoid mutual extrusion and collision between the cable cores when the optical cable is subjected to a large impact force.

[0050] Further, three cable cores are uniformly distributed around the air bag 3.

[0051] Referring to Figure 1As shown, further, the skeleton layer 2 is hexagonal star-shaped in cross section, and the sharp-angle recess 21 is obtuse; the symmetry of the hexagonal star shape can uniformly disperse external pressure and avoid local stress concentration, thereby significantly improving the overall compression resistance of the skeleton layer 2; the obtuse sharp-angle recess 21 forms a gentle deformation transition zone when under compression, is less likely to cause stress concentration than an acute angle, can absorb more impact energy, and reduces direct damage to the cable core.

[0052] Further, the sharp-angle protrusion 20 is acute, and the angle of the sharp-angle protrusion 20 is 60 degrees.

[0053] Further, two temperature sensing optical fibers and two pressure sensing optical fibers are further included to ensure the continuity of monitoring data and avoid single-point failure to cause system failure.

[0054] Referring to Figure 1 As shown, further, the skeleton layer 2 is hexagonal star-shaped in cross section, and the sharp-angle recess 21 is obtuse; the symmetry of the hexagonal star shape can uniformly disperse external pressure and avoid local stress concentration, thereby significantly improving the overall compression resistance of the skeleton layer 2; the obtuse sharp-angle recess 21 forms a gentle deformation transition zone when under compression, is less likely to cause stress concentration than an acute angle, can absorb more impact energy, and reduces direct damage to the cable core.

[0055] Referring to Figure 1 As shown, further, the cable core includes a sleeve 5 and optical fibers 7 arranged inside the sleeve 5, and the sleeve 5 is filled with optical fiber paste 6.

[0056] Referring to Figure 2 As shown, in an embodiment of the utility model, further include through the optical fiber connecting fiber 17 is connected in the laser light emitting optical source 19 of one end of the light emitting optical fiber 10, laser light emitting optical source 19 emits high intensity directional light beam, after conducting through light emitting optical fiber 10, can form high brightness visible light signal in the dark environment of mine, further, laser light emitting optical source 19 can be directly connected to power supply, in the place without external power supply, can use internal power supply to provide electric energy, provides not less than 16 hours of continuous flicker.

[0057] Referring to Figure 2 As shown, in an embodiment of the utility model, the optical fiber connecting fiber 17 is provided with an FC connector 18 relative to one end connected to the light emitting optical fiber 10, and the FC connector 18 is connected to the laser light emitting optical source 19.

[0058] Referring to Figure 1 As shown, further, the inner wall of the sheath layer 1 and the sharp-angle recess 21 form a closed gap, and the gas in the air bag 3 is extruded into the gap.

[0059] Referring to Figure 1 As shown, further, the light emitting unit 4 is arranged on the inner surface of the sheath layer 1.

[0060] The working principle of the mine sensing compression indicating optical cable is as follows:

[0061] External pressure is transmitted to the skeleton layer 2 through the sheath layer 1, the sharp corner groove 21 absorbs the impact energy, the air bag 3 is pressed to release the gas into the containing gap between the skeleton layer 2 and the sheath layer 1, the space is vacated for the cable core to move to the center of the skeleton layer 2, the optical fiber 7 is prevented from being broken under pressure, after the external pressure is removed, the sharp corner protrusion 20 slowly restores to the original state, the recessed part of the sheath layer 1 is repaired, the temperature sensing optical fiber and the pressure sensing optical fiber monitor the downhole environment in real time, the data is transmitted to the ground system through the optical signal, for the early warning mechanism to detect, the laser light emitting light source 19 transmits visible light to the light emitting optical fiber 10, cooperates with the direction indicating sign 15 and the fluorescent material of the outer sheath 11, provides path guidance for the downhole personnel.

[0062] Obviously, the above embodiments are only examples for clearly illustrating, not limiting the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A mining-use sensing and pressure-resistant optical cable, characterized in that, include, Sheath layer; A skeleton layer is disposed within the sheath layer. The skeleton layer is composed of carbon fiber material and has a cable core inside. The cross-section of the skeleton layer is a polygonal star shape. The polygonal star shape includes multiple sharp protrusions and sharp grooves, and the sharp protrusions abut against the inner wall of the sheath layer. An airbag is embedded in the center of the skeleton layer.

2. The mining sensing and pressure-resistant optical cable according to claim 1, characterized in that, It also includes temperature-sensing optical fibers and pressure-sensing optical fibers disposed within the pointed corner groove.

3. The mining sensing and pressure-resistant optical cable according to claim 1, characterized in that, The sheath layer is made of a composite material consisting of polyethylene and low-smoke halogen-free materials.

4. The mining sensing and pressure-resistant optical cable according to claim 1, characterized in that, It also includes a light-emitting unit embedded between the sheath layer and the skeleton layer, and the light-emitting unit further includes a light-emitting optical fiber and an outer sheath covering the light-emitting optical fiber.

5. A mining-use sensing and pressure-resistant optical cable according to claim 4, characterized in that, The outer sheath is covered with flame-retardant PVC material, and fluorescent material is evenly distributed on the flame-retardant PVC material.

6. A mining-use sensing and pressure-resistant optical cable according to claim 4, characterized in that, The outer surface of the outer sheath is provided with a direction indicator mark, which points to the end of the light-emitting optical fiber connected to the light source.

7. A mining-use sensing and pressure-resistant optical cable according to claim 4, characterized in that, The light-emitting unit also includes an inner sheath made of transparent nylon material, which covers the light-emitting optical fiber, and an outer sheath covers the inner sheath.

8. A mining-use sensing and pressure-resistant optical cable according to claim 7, characterized in that, The light-emitting unit also includes a steel strand reinforcement embedded between the outer sheath and the inner sheath.

9. A mining-use sensing and pressure-resistant optical cable according to claim 1, characterized in that, Multiple cable cores are evenly distributed around the airbag.

10. A mining-use sensing and pressure-resistant optical cable according to claim 1, characterized in that, The cross-section of the skeleton layer is hexagonal, and the pointed groove is obtuse.

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