Stretch-resistant coal cutter shielding rubber jacketed flexible cable

Abstract

The utility model discloses a tensile shielding rubber jacketed flexible cable for a coal mining machine, which belongs to the technical field of tensile cables and comprises a protective layer, a filling layer is sleeved in the protective layer, halogen-free filler is filled in the filling layer, an anti-bending layer is sleeved on the surface of the protective layer, a halogen-free insulating layer is sleeved on the surface of the anti-bending layer, and the halogen-free insulating layer is sleeved on the surface of the anti-bending layer. The surface of the halogen-free insulating layer is sleeved with a spiral tensile layer, and the spiral tensile layer is spiral. According to the utility model, through the arrangement of the spiral tensile layer, when the coal mining machine works, the cable needs to be frequently moved and bent through continuous advancing and retreating of the coal mining machine during working, and the spiral tensile layer bears external force, so that the coal mining machine is prevented from being damaged; and when the cable is excessively bent, the supporting columns in the supporting grooves bear main tensile force, so that an internal conductor and an insulating layer are prevented from being directly stressed and deformed, fatigue fracture of the conductor is reduced, and short circuit or electric leakage caused by damage of a sheath is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of tensile cable technology, and particularly relates to a tensile-resistant shielded rubber-sheathed flexible cable for coal mining machines. Background Technology

[0002] Coal mining machine cables are high-performance cables specifically designed for coal mining. They possess characteristics such as tensile strength, abrasion resistance, oil resistance, and flame retardancy. Their structure employs multi-strand fine copper wire conductors, a highly elastic insulation layer, a metal braided shielding layer, and a wear-resistant rubber sheath, ensuring stable transmission of power and signals even in frequent movement and harsh environments. The cables also have excellent electromagnetic interference resistance, making them suitable for power supply and control of heavy equipment such as coal mining machines, ensuring efficient and safe production in coal mines.

[0003] Typical coal mining machine cables are frequently bent during dragging, leading to fatigue of the overall cable structure and shortening their service life, thus requiring improvement.

[0004] Based on this, this utility model designs a tensile-resistant shielded rubber-sheathed flexible cable for coal mining machines to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to solve the problem that the frequent bending of coal mining machine cables during the dragging process leads to fatigue of the overall cable structure and shortens the service life, and to propose a tensile-resistant shielded rubber-sheathed flexible cable for coal mining machines.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A tensile-resistant shielded rubber-sheathed flexible cable for a coal mining machine includes a protective layer (1), a filling layer (2) sleeved inside the protective layer (1), and the filling layer (2) is filled with a halogen-free filler. A bending-resistant layer (3) is sleeved on the surface of the protective layer (1), a halogen-free insulation layer (4) is sleeved on the surface of the bending-resistant layer (3), a spiral tensile-resistant layer (5) is sleeved on the surface of the halogen-free insulation layer (4), and the spiral tensile-resistant layer (5) is spiral-shaped. A support sleeve (6) is provided inside the filling layer (2), a support groove (7) is opened inside the support sleeve (6), and a support column (8) is fixedly installed inside the support groove (7).

[0008] As a further description of the above technical solution:

[0009] The filling layer (2) has multiple mounting grooves (9) on the surface of the support sleeve (6) corresponding to the interior of the filling layer (2). Anti-bending steel wires (10) are fixedly installed inside the mounting grooves (9) and the anti-bending steel wires (10) are wrapped around the surface of the support sleeve (6).

[0010] As a further description of the above technical solution:

[0011] The filling layer (2) has multiple rectangular grooves (11) inside, and soft blocks (12) are fixedly installed inside the rectangular grooves (11).

[0012] As a further description of the above technical solution:

[0013] Fireproof grooves (13) are provided in multiple places inside the filling layer (2). A gas storage hose (14) is fixedly installed inside the fireproof groove (13), and the gas storage hose (14) stores inert gas inside.

[0014] As a further description of the above technical solution:

[0015] The filling layer (2) has multiple shielding sleeves (15) inside, and the shielding sleeves (15) have cable conductors (16) inside.

[0016] As a further description of the above technical solution:

[0017] The anti-bending layer (3) has multiple fixing grooves (17) inside, and the fixing grooves (17) are provided with protective steel wires (18), and the multiple protective steel wires (18) are twisted together in a twisted structure. The surface of the spiral tensile layer (5) is covered with a wear-resistant outer jacket (19).

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0019] 1. In this utility model, by setting a spiral tensile layer and support columns, when the coal mining machine is working, the cable needs to move and bend frequently due to the continuous forward, backward and turning movements of the coal mining machine. The spiral tensile layer bears the external force, maintains the circular cross-section of the cable, and prevents the cable from deforming. When the cable is excessively bent, the support columns inside the support groove bear the main tensile force, avoiding direct stress and deformation of the internal conductor and insulation layer, thereby reducing conductor fatigue fracture and preventing short circuits or leakage caused by sheath damage.

[0020] 2. In this utility model, by setting up a fireproof trough and a gas storage hose, when the coal mining machine is working, the cable is connected from the power source to the electrical control system of the coal mining machine. Frequent dragging and bending of the cable will cause the bent part of the cable to overheat. If the cable leaks electricity and burns internally, the high temperature will melt the gas storage hose inside the fireproof trough, and the gas storage hose will release inert gas to create a low-oxygen space inside the cable to prevent the cable from burning further and to prevent accidents. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a tensile-resistant shielded rubber-sheathed flexible cable for a coal mining machine proposed in this utility model;

[0022] Figure 2 This is a cross-sectional view of a shielded rubber-sheathed flexible cable for a tensile-resistant coal mining machine proposed in this utility model.

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of a tensile-resistant shielded rubber-sheathed flexible cable for a coal mining machine proposed in this utility model.

[0024] Legend:

[0025] 1. Protective layer; 2. Filling layer; 3. Bending-resistant layer; 4. Halogen-free insulation layer; 5. Spiral tensile layer; 6. Support sleeve; 7. Support groove; 8. Support column; 9. Mounting groove; 10. Bending-resistant steel wire; 11. Rectangular groove; 12. Soft block; 13. Fireproof groove; 14. Gas storage hose; 15. Shielding sleeve; 16. Cable conductor; 17. Fixing groove; 18. Protective steel wire; 19. Wear-resistant outer jacket. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see the appendix Figure 1 -Appendix Figure 3 This utility model provides a technical solution: a tensile-resistant shielded rubber-sheathed flexible cable for a coal mining machine, comprising a protective layer 1, a filling layer 2 sleeved inside the protective layer 1, and the filling layer 2 being filled with a halogen-free filler, an anti-bending layer 3 sleeved on the surface of the protective layer 1, a halogen-free insulation layer 4 sleeved on the surface of the anti-bending layer 3, a spiral tensile layer 5 sleeved on the surface of the halogen-free insulation layer 4, and the spiral tensile layer 5 being spiral-shaped, a support sleeve 6 provided inside the filling layer 2, a support groove 7 provided inside the support sleeve 6, and a support column 8 fixedly installed inside the support groove 7.

[0028] The specific implementation method is as follows: multiple mounting grooves 9 are provided inside the filling layer 2 corresponding to the surface of the support sleeve 6. Anti-bending steel wires 10 are fixedly installed inside the mounting grooves 9 and the anti-bending steel wires 10 are wrapped around the surface of the support sleeve 6.

[0029] By setting the mounting groove 9 and the anti-bending steel wire 10, the cable is subjected to repeated twisting during operation, and the pressure is applied to the inside of the cable by squeezing the wear-resistant jacket 19. The anti-bending steel wire 10 inside the mounting groove 9 squeezes and buffers each other to buffer the conductor part inside the cable and prevent damage to the inside of the cable.

[0030] The specific implementation method is as follows: rectangular grooves 11 are provided in multiple places inside the filling layer 2, and soft blocks 12 are fixedly installed inside the rectangular grooves 11.

[0031] By setting up a rectangular groove 11 and a soft block 12, when the coal mining machine is working, the cable is repeatedly pulled and twisted. External pressure is applied to the inside of the cable. When the cable is impacted, the pressure is transmitted to the soft block 12 inside the rectangular groove 11. The soft block 12 absorbs most of the impact to prevent the impact from flattening the cable and causing internal filling leakage.

[0032] The specific implementation method is as follows: multiple fireproof grooves 13 are provided inside the filling layer 2, and a gas storage hose 14 is fixedly installed inside the fireproof groove 13, and the gas storage hose 14 stores inert gas inside.

[0033] By setting up a fireproof trough 13 and a gas storage hose 14, when the coal mining machine is working, the cable will overheat due to repeated pulling and dragging. If the conductor inside the cable overheats or spontaneously combusts, the gas storage hose 14 inside the fireproof trough 13 will melt due to the high temperature. After the gas storage hose 14 melts, it releases the inert gases inside, creating a low-oxygen space inside the cable, allowing the surface cable to burn further.

[0034] The specific implementation method is as follows: multiple shielding sleeves 15 are provided inside the filling layer 2, and cable conductors 16 are provided inside the shielding sleeves 15.

[0035] By setting up a shielding sleeve 15 and a cable conductor 16, when the coal mining machine is working, the cable is connected from the power source to the electrical control system of the coal mining machine. The current is transmitted to the electrical control system of the coal mining machine through the cable conductor 16 inside the cable. During the transmission of current, multiple cable conductors 16 may interfere with the external electromagnetic field. By attaching the shielding sleeve 15 to the surface of the cable conductor 16, the interference of the external electromagnetic field with the signal transmission inside the cable can be prevented. By grounding the shielding sleeve 15, the accumulation of static electricity and the risk of electric shock can be prevented.

[0036] The specific implementation method is as follows: multiple fixing grooves 17 are provided inside the anti-bending layer 3, and protective steel wires 18 are provided inside the fixing grooves 17. The multiple protective steel wires 18 are twisted together in a twisted structure, and a wear-resistant outer sleeve 19 is sleeved on the surface of the spiral tensile layer 5.

[0037] By setting up protective steel wires 18 and wear-resistant jackets 19, the cable is repeatedly dragged when the coal mining machine is working, causing the wear-resistant jackets 19 on the outside of the cable to rub against the ground, thereby reducing damage to the cable body. When the cable is impacted, the protective steel wires 18 inside the fixing groove 17 are squeezed and buffered by each other, thereby reducing the impact damage to the cable body.

[0038] Working principle and usage: Before the coal mining machine starts working, first inspect the surface of the cable, then connect the cable from the power supply to the electrical control system of the coal mining machine. The cable is equipped with a wear-resistant jacket 19, so even if the cable is repeatedly dragged during the operation of the coal mining machine, it will not cause damage to the inside of the cable. When the cable is dragged and twisted, the internal support column 8 of the cable bears most of the pressure, preventing the cable from being excessively bent and breaking. Through the spiral tensile layer 5 set inside the cable, the spiral tensile layer 5 can share the tensile force when the cable is under tension, preventing damage to the conductor or other internal structures. During the dragging and twisting process, the internal conductor of the cable may overheat. If the cable spontaneously combusts, the high temperature will melt the gas storage hose 14, and the gas storage hose 14 will release the inert gas inside, creating a low-oxygen space inside the cable to prevent the cable from burning.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A tensile-resistant sheathed soft cable for coal mining machines, comprising a protective layer (1), characterized in that, The protective layer (1) is sleeved with a filling layer (2), the filling layer (2) is filled with halogen-free filling, the surface of the protective layer (1) is sleeved with a anti-bending layer (3), the surface of the anti-bending layer (3) is sleeved with a halogen-free insulation layer (4), the surface of the halogen-free insulation layer (4) is sleeved with a spiral tensile layer (5), the spiral tensile layer (5) is spiral, the filling layer (2) is internally provided with a supporting sleeve (6), the supporting sleeve (6) is internally provided with a supporting groove (7), the supporting groove (7) is internally provided with a supporting column (8).

2. A tensile resistance coal cutter shielded cable according to claim 1 characterised in that, The surface of the filling layer (2) is internally provided with a plurality of installation grooves (9) corresponding to the supporting sleeve (6), the installation groove (9) is internally provided with an anti-bending steel wire (10), and the anti-bending steel wire (10) is wrapped around the surface of the supporting sleeve (6).

3. A tensile resistance coal cutter shielded cable according to claim 1 characterised in that, The filling layer (2) is internally provided with a plurality of rectangular grooves (11), the rectangular groove (11) is internally provided with a soft block (12).

4. A tensile resistance coal cutter shielded cable according to claim 1 characterised in that, The filling layer (2) is internally provided with a plurality of fireproof grooves (13), the fireproof groove (13) is internally provided with a gas storage hose (14), and the gas storage hose (14) is internally provided with inert gas.

5. A tensile resistance coal cutter shielded cable according to claim 1 characterised in that, The filling layer (2) is internally provided with a plurality of shielding sleeves (15), the shielding sleeve (15) is internally provided with a cable conductor (16).

6. A tensile resistance coal cutter shielded cable according to claim 1 characterised in that, The anti-bending layer (3) is internally provided with a plurality of fixing grooves (17), the fixing groove (17) is internally provided with a protective steel wire (18), and a plurality of protective steel wires (18) are twisted in a twisted structure, and the surface of the spiral tensile layer (5) is sleeved with a wear-resistant sleeve (19).

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