Mining rubber cable

Abstract

The utility model relates to the technical field of cables, and discloses a mining rubber cable, which comprises a protective layer, a separating sheath is arranged at the center inside the protective layer, a plurality of support frames are uniformly arranged between the separating sheath and the protective layer along the circumferential direction of the separating sheath, one end of each support frame is connected with the separating sheath, and the other end of each support frame is connected with the protective layer. A signal transmission unit and a power transmission unit are arranged between the supporting frame and the protection layer, a plurality of grooves are formed in the inner side face of the protection layer at intervals, and an elastic supporting strip is arranged in each groove in a clamped mode. The optical cable has the advantages of being capable of simultaneously meeting integration of power transmission, signal control and optical fiber communication, good in overall compression resistance and tensile effect and long in service life.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a rubber cable for mining. Background Art

[0002] In the process of coal mining operations, it is necessary to use mining cables to monitor the production site in real time and transmit the real-time image information underground to the ground anytime and anywhere. When installing the cables, the cables will bend and stretch in the mine, and even gravel may fall on the cables. The existing cables have poor adaptability to the complex conditions in the mine and are prone to breakage. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a rubber cable for mining, so as to solve the problem that the existing cables have poor adaptability to the complex conditions in the mine and are prone to breakage.

[0004] The utility model solves the above technical problems through the following technical means: a mining rubber cable, comprising a protective layer, an isolation sheath is arranged at the inner center of the protective layer, a plurality of support frames are evenly arranged between the isolation sheath and the protective layer along the circumference of the isolation sheath, one end of the support frame is connected to the isolation sheath, and the other end of the support frame is connected to the protective layer, a signal transmission unit and a power transmission unit are arranged between the support frame and the protective layer, the signal transmission unit comprises a plurality of covering layers corresponding to the support frames one by one, the power transmission unit comprises a plurality of main core conductors, a plurality of grooves are also arranged at intervals on the inner side surface of the protective layer, and an elastic support strip is clamped in each of the grooves.

[0005] Furthermore, the protective layer includes an outer sheath, a wrapping layer, and a reinforcement layer from the outside to the inside.

[0006] Furthermore, an inner sheath is provided in the reinforcement layer, and the signal transmission unit, the power transmission unit and the isolation sheath are all wrapped in the inner side of the inner sheath, and the outer side of the inner sheath is in contact with the inner side of the reinforcement layer. The support frame includes two support legs arranged at intervals, and one end of the support leg is fixedly connected to the outer side of the isolation sheath, and the other end of the support leg passes through the inner sheath and is connected to the inner side of the reinforcement layer.

[0007] Furthermore, the reinforcing layer is provided with the groove between the two supporting legs of each supporting frame, and the reinforcing layer is provided with the groove between two adjacent supporting frames, and the outer side of the inner sheath is provided with an installation groove corresponding to each groove, one end of the elastic support strip is clamped in the installation groove, and the other end of the elastic support strip extends out of the installation groove and is clamped in the groove.

[0008] Furthermore, the power transmission unit includes a plurality of main core conductors, each of which is installed between two adjacent support frames, each of which is wrapped with a conductor shielding layer, each of which is wrapped with a conductor insulation layer, and each of which is wrapped with an insulation shielding layer. The edge of the insulating sheath is also provided with a plurality of second card grooves corresponding to the insulation shielding layers along its circumference, and the insulation shielding layers are clamped in the corresponding second card grooves.

[0009] Furthermore, the signal transmission unit includes a plurality of covering layers corresponding one-to-one to the support frames, each of the covering layers is located inside the corresponding support frame, and the edge of the isolation sleeve is provided with a plurality of first card grooves corresponding one-to-one to the covering layers along its circumference, and the covering layers are carded in the corresponding first card grooves.

[0010] Furthermore, a ground wire is arranged in each of the covering layers, a control wire core insulation layer is arranged in each of the ground wires, and a control wire core conductor is arranged in each of the control wire core insulation layers.

[0011] Furthermore, an optical fiber wrapping layer is arranged at the center of the interior of the isolation sheath, a filling is arranged at the center of the interior of the optical fiber wrapping layer, and a plurality of optical fibers are arranged between the filling and the optical fiber wrapping layer.

[0012] The beneficial effects of the utility model are as follows: by setting up a signal transmission unit and a power transmission unit, it can simultaneously meet the needs of signal transmission and power transmission, and perform real-time monitoring inside the mine; the protective layer can provide protection for the signal transmission unit and the power transmission unit; at the same time, by setting up a support frame between the isolation sleeve and the protective layer, the overall compression and tensile resistance are improved, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0014] Figure 1 This is a structural schematic diagram of a mining rubber cable of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the septum sheath of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the optical fiber in the second embodiment of the utility model.

[0017] In the above drawings: 1. Main line core conductor; 2. Conductor shielding layer; 3. Main line core insulation layer; 4. Insulation shielding layer; 5. Optical fiber; 6. Filling; 7. Optical fiber sheath; 8. Isolation sheath; 9. Control line core conductor; 10. Control line core insulation layer; 11. Ground wire; 12. Coating layer; 13. Inner sheath; 14. Reinforcement layer; 15. Wrapping layer; 16. Outer sheath; 17. Support frame; 18. Elastic support strip; 19. Second slot; 20. First slot. DETAILED DESCRIPTION

[0018] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0019] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the figure. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. In the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0020] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0021] like Figure 1-3As shown, the embodiment of the utility model proposes a mining rubber cable, and the protective layers of the cable are outer sheath 16, wrapping layer 15, and reinforcement layer 14 from outside to inside. Inside the reinforcement layer 14 is the inner sheath 13, and the signal transmission unit, the power transmission unit, and the isolation sheath 8 are all wrapped on the inner side of the inner sheath 13. The outer side of the inner sheath 13 fits the inner side of the reinforcement layer 14. The inner center of the inner sheath 13 is provided with an optical fiber 5 wrapping layer, and the inner center of the optical fiber 5 wrapping layer is provided with a filling 6. Six optical fibers 5 are evenly arranged along the circumference of the filling 6 between the filling 6 and the optical fiber 5 wrapping layer, and the optical fiber 5 wrapping layer adopts a rubber sheath. The set optical fiber 5 can realize high-speed and high-quality data transmission of each component, and the data signal will not be interrupted or lost, which provides important technical support for the mining cable system of real-time monitoring and control, and can effectively solve the integration of power transmission, signal control and optical fiber 5 communication in harsh environments. It can be applied in harsh environments, and the filling 6 can effectively fill the bonding gap between the optical fibers 5, realize the effective transmission of external stress, and will not be concentrated in a certain place to cause accidental breakage. The outer sheath of the optical fiber 5 is wrapped with an isolation sheath 8, and three support frames 17 are evenly arranged on the surface of the isolation sheath 8 along the circumference of the isolation sheath 8. Each support frame 17 includes two support legs arranged at intervals, one end of the support leg is integrally formed and fixedly connected with the outer side of the isolation sheath 8, and the other end of the support leg passes through the inner sheath 13 and abuts against the inner side of the reinforcement layer 14. A control core conductor 9 is arranged between the two support legs of each support frame 17, and each control core conductor 9 is wrapped with a control core insulation layer 10, and each control core insulation layer 10 is wrapped with a ground wire 11, and each ground wire 11 is wrapped with a coating layer 12. The edge of the isolation sheath 8 is evenly arranged with three first card slots 20 corresponding to the coating layer 12 along its circumference, and the coating layer 12 is clamped in the corresponding first card slot 20. A main line core conductor 1 is arranged between two adjacent support frames 17, each main line core conductor 1 is wrapped with a conductor shielding layer 2, each conductor shielding layer 2 is wrapped with a conductor insulation layer, and each conductor insulation layer is wrapped with an insulation shielding layer 4. The edge of the isolation sheath 8 is also evenly provided with three second card grooves 19 corresponding to the insulation shielding layer 4 along its circumference, and the insulation shielding layer 4 is clamped in the corresponding second card groove 19.

[0022] In the above embodiment, Figure 1 As shown, three independent main core conductors 1 form a power transmission unit for power transmission, and three independent control core conductors 9 form a signal transmission unit for signal transmission. The main core conductors 1 and the control core conductors 9 should be annealed copper conductors with the fifth metal layer or non-metal-plated layer in accordance with GB / T 3956-2008, with a smooth surface without sharp protrusions or other defects that damage insulation, making the conductors particularly soft.

[0023] In the above embodiment, Figure 1As shown, the insulation layer material is ethylene propylene rubber insulation, and the insulation performance should comply with the XJ-30A regulations in GB / T7594.8-1987. The insulation layer should be tightly extruded on the conductor or isolation layer and easy to peel off without damaging the conductor. There should be no visible defects such as bubbles and sand holes on the cross section of the insulation layer, the insulation surface should be flat, the color should be uniform, and there should be no mechanical damage and oil pollution. It has excellent insulation performance, fatigue resistance, heat resistance, heat resistance and mechanical properties. Among them, the tensile strength of the control line core insulation layer 10 is not less than 6.5MPa.

[0024] In the above embodiment, Figure 1 As shown, the main core conductor 1 of the cable with a rated voltage of 3.6 / 6kV or above shall have a conductor shielding layer 2, which shall be a semi-conductive material, extruded on the main core conductor 1 or on an extruded semi-conductive tape, and the extruded conductor shielding layer 2 shall be tightly combined with the main core insulation layer 3; the main core insulation layer 3 of the cable with a rated voltage of 3.6 / 6kV or above shall have an insulating shielding layer 4, which shall be a semi-conductive material, extruded on the main core insulation layer 3, and the thickness of the insulating shielding layer 4 is not included in the insulation thickness. The shielding layer can even out the electric field on the outer surface of the core, and avoid partial discharge between the conductor and the insulation caused by the uneven surface of the conductor or the air gap caused by the twisting of the core.

[0025] In the above embodiment, Figure 1 As shown, the coating layer 12 should be made of a wrapping or extruding type semi-conductive material, and the main function of the ground wire 11 is to provide safety protection. The isolation sheath 8 and the support frame 17 are made of polyvinyl chloride material, which has good corrosion resistance and improves the mechanical strength of the cable, thereby extending the service life of the cable. The isolation sheath 8 and the support frame 17 serve as carriers of the power transmission unit and the signal transmission unit, so that when the cable is bent and dragged, the conductor is subjected to very little force, effectively avoiding the conductor from being pulled and bent, thereby extending the service life of the cable. The support frame 17 can realize the effective transmission of external stress, and will not be concentrated in a certain place to cause accidental breakage. Moreover, it can avoid excessive extrusion in a certain area, ensuring that no unnecessary deformation occurs in harsh use environments. The performance of the inner sheath 13 should comply with the provisions of XH-03 type in GB / T 7594,7. The inner sheath 13 can select suitable sheath materials according to needs, such as nylon sheath, TPU sheath, etc. The inner side of the inner sheath 13 is tightly wrapped and fits the outer side of the power transmission unit and the signal transmission unit. The outer sheath 16 is made of TPU material, with a tear strength of not less than 5.0N / mm, a tensile strength of not less than 12.0Mpa, and an elongation at break of not less than 300%. Aramid fiber or other high-strength fiber braiding reinforcement is allowed between the inner sheath 13 and the outer sheath 16, and the braiding should be flat and uniform. The reinforcement layer 14 can be made of polyester fiber, which can ensure that the cable can still maintain good tensile resistance and torsion resistance in complex environments, and improve the mechanical load bearing capacity of the cable.

[0026] like Figure 1 As shown, the elastic support strip 18 includes an assembly strip with a square end face and a limiting strip with a circular end face, the assembly strip and the limiting strip are integrally formed, the assembly strip is clamped in the groove, the limiting strip is clamped in the installation slot, and the elastic support strip 18 is made of a thermoplastic elastomer. In this embodiment, by designing a groove with a square end face and the elastic support strip 18 clamped therein, when subjected to a large pressure in a specific application environment, the elastic limiting support strip can provide a limiting effect, and because the thermoplastic elastomer material is selected, it will not generate excessive reaction force on the internal conductor, thereby effectively avoiding the displacement of the internal conductor, and protecting the conductor, thereby improving the overall pressure resistance of the cable and the stability of the internal structure.

[0027] It can be seen from the above text description and the accompanying drawings that the following advantages are achieved after adopting the utility model:

[0028] 1. It can effectively solve the integration of power transmission, signal control and optical fiber 5 communication in harsh environments and can be used in harsh environments.

[0029] 2. The use of the isolation sleeve 8 and the provision of the support frame 17 greatly improve the tensile and compressive strengths of the product.

[0030] 3. By setting up a shielding layer, the safety and stability of the product are greatly improved.

[0031] 4. A double-layer protection structure is realized by the inner sheath 13 and the outer sheath 16 to increase the service life.

[0032] 5. By providing the grooves and the elastic support strips 18, the compressive strength of the product is further increased.

[0033] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. A mining rubber cable, characterized in that: The invention comprises a protective layer, wherein an isolation sleeve (8) is arranged at the center of the interior of the protective layer, and a plurality of support frames (17) are evenly arranged between the isolation sleeve (8) and the protective layer along the circumference of the isolation sleeve (8), one end of the support frame (17) is connected to the isolation sleeve (8), and the other end of the support frame (17) is connected to the protective layer, and a signal transmission unit and a power transmission unit are arranged between the support frame (17) and the protective layer, the signal transmission unit comprises a plurality of coating layers (12) corresponding to the support frames (17) one by one, and the power transmission unit comprises a plurality of main core conductors (1), and a plurality of grooves are arranged at intervals on the inner side surface of the protective layer, and an elastic support strip (18) is clamped in each of the grooves.

2. A mining rubber cable according to claim 1, characterized in that: The protective layer comprises, from the outside to the inside, an outer sheath (16), a wrapping layer (15), and a reinforcement layer (14).

3. A mining rubber cable according to claim 2, characterized in that: An inner sheath (13) is also provided inside the reinforcing layer (14); the signal transmission unit, the power transmission unit and the isolation sheath (8) are all wrapped inside the inner sheath (13); the outer side of the inner sheath (13) is in contact with the inner side of the reinforcing layer (14); the support frame (17) comprises two support legs arranged at intervals; one end of the support leg is fixedly connected to the outer side of the isolation sheath (8); the other end of the support leg passes through the inner sheath (13) and is connected to the inner side of the reinforcing layer (14).

4. A mining rubber cable according to claim 3, characterized in that: The reinforcing layer (14) is provided with the groove between the two supporting legs of each supporting frame (17), and the reinforcing layer (14) is provided with the groove between two adjacent supporting frames (17); the outer side of the inner sheath (13) is provided with a mounting groove corresponding to each groove; one end of the elastic supporting strip (18) is clamped in the mounting groove, and the other end of the elastic supporting strip (18) extends out of the mounting groove and is clamped in the groove.

5. A mining rubber cable according to claim 3, characterized in that: The main line core conductor (1) is installed between two adjacent support frames (17), each of the main line core conductors (1) is wrapped with a conductor shielding layer (2), each of the conductor shielding layers (2) is wrapped with a conductor insulation layer, and each of the conductor insulation layers is wrapped with an insulation shielding layer (4). The edge of the isolation sheath (8) is also provided with a plurality of second card slots (19) corresponding to the insulation shielding layers (4) along its circumference, and the insulation shielding layers (4) are clamped in the corresponding second card slots (19).

6. A mining rubber cable according to claim 3, characterized in that: Each of the coating layers (12) is located inside the corresponding support frame (17), and a plurality of first slots (20) corresponding to the coating layers (12) are arranged along the circumference of the edge of the isolation sleeve (8), and the coating layers (12) are clamped in the corresponding first slots (20).

7. A mining rubber cable according to claim 6, characterized in that: A ground wire (11) is disposed in each of the coating layers (12), a control wire core insulation layer (10) is disposed in each of the ground wires (11), and a control wire core conductor (9) is disposed in each of the control wire core insulation layers (10).

8. A mining rubber cable according to claim 1, characterized in that: An optical fiber (5) wrapping layer is arranged at the center of the interior of the isolation sheath (8), a filler (6) is arranged at the center of the interior of the optical fiber (5) wrapping layer, and a plurality of optical fibers (5) are arranged between the filler (6) and the optical fiber (5) wrapping layer.

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