A high-strength, wear-resistant, photoelectric composite reel cable for electric engineering vehicles

Abstract

This utility model provides a high-strength, wear-resistant, optoelectronic composite reel cable for electric engineering vehicles, comprising multiple power transmission units, at least one signal transmission unit, at least one optical transmission unit, an inner sheath, a reinforcing layer, and an outer sheath. The power transmission units are symmetrically arranged in the cable cross-section, as are the signal and optical transmission units, and are enclosed by the inner sheath. The reinforcing layer is disposed outside the inner sheath, and the outer sheath is disposed outside the reinforcing layer. Each power transmission unit is configured to transmit power and includes a positive and a negative pole unit. This cable is a DC reel cable with two positive and two negative poles. While meeting the same power transmission requirements, it reduces the cross-section of a single conductor, lowering the overall weight and bending inertia of the cable. Simultaneously, it integrates optical fiber units and signal line units, enabling the use of electrical signals even when optical signals fail.

Description

Technical Field

[0001] This utility model belongs to the field of optoelectronic composite drum cable technology, specifically a high-strength wear-resistant optoelectronic composite drum cable for electric engineering vehicles. Background Technology

[0002] With the intelligent upgrading of heavy industrial settings such as ports and mines, electric engineering vehicles are gradually replacing traditional fuel-powered equipment. However, electric engineering vehicles require power transmission, and the reel cables used for power transmission present the following problems:

[0003] 1. Early reel cables only carried power transmission functions, while intelligent scenarios require the simultaneous transmission of control signals and optical communication data. Existing technology can only lay power cables, signal cables, and optical cables separately. The parallel laying of multiple cables reduces installation efficiency and mutual interference can easily cause signal packet loss.

[0004] 2. Traditional reel cables generally have low tensile strength and short bending life. However, electric engineering vehicles have high daily operating cycles, which places more stringent requirements on the reel cables' ability to withstand repeated bending and their tensile strength; this leads to an excessively fast cracking rate in the existing cable sheath and a high conductor breakage rate.

[0005] 3. Electric engineering vehicles have an instantaneous power of up to 500kW, so the motor needs to provide strong instantaneous torque, which requires a larger cable cross-section; however, the increase in cable cross-section leads to an increase in mass inertia, an increase in bending torque, and accelerated wear of the drum mechanism. Utility Model Content

[0006] The purpose of this invention is to provide a high-strength, wear-resistant, photoelectric composite reel cable for electric engineering vehicles that has photoelectric transmission function and better bending resistance.

[0007] The high-strength, wear-resistant, photoelectric composite reel cable for electric engineering vehicles provided by this utility model includes multiple power transmission units, at least one signal transmission unit, at least one optical transmission unit, an inner sheath, a reinforcing layer, and an outer sheath. The power transmission units are symmetrically arranged in the cable cross-section, and the signal transmission units and optical transmission units are wrapped by the inner sheath. The reinforcing layer is disposed outside the inner sheath. The outer sheath is disposed outside the reinforcing layer. The power transmission unit is configured to transmit power and includes a positive pole unit and a negative pole unit.

[0008] In one embodiment of the aforementioned cable, the power transmission unit includes a conductor, an insulation layer, a shielding layer, and an insulating sheath arranged sequentially from the inside out.

[0009] In one embodiment of the above-mentioned cable, the conductor is an annealed soft copper conductor with a single wire diameter of approximately 0.2 mm. It is formed by stranding the strands together, and the twisting pitch ratio is no greater than 10D.

[0010] In one embodiment of the above-mentioned cable, the shielding layer is a double shielding structure made of aluminum foil and tinned copper wire, and the braiding density is not less than 85%.

[0011] In one embodiment of the above-mentioned cable, the signal transmission unit includes a conductor core, which is composed of multiple stranded annealed soft copper wires and Kevlar copper foil wires, and is then twisted in pairs to form a cable.

[0012] In one embodiment of the above-mentioned cable, the optical transmission unit includes a multi-core optical fiber inserted into a loose tube, the loose tube being filled with a waterproof compound; a reinforcing core is provided at the center of the cable core, the loose tube and the filling rope are twisted around the reinforcing core to form the cable core, and the cable core is sheathed after being wrapped with a longitudinal shielding layer.

[0013] In one embodiment of the above-mentioned cable, the reinforcing layer comprises multiple twisted Kevlar wires, each Kevlar wire having a strength of not less than 200N.

[0014] In one embodiment of the cable described above, the inner sheath and the outer sheath are made of abrasion-resistant polymer material.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This cable is a DC reel cable with two positive and two negative poles. While meeting the same power transmission requirements, it reduces the cross-section of a single conductor, thereby reducing the overall weight and bending inertia of the cable. At the same time, it integrates fiber optic units and signal line units, which can enable electrical signals in the event of optical signal failure.

[0017] 2. The cable is completely symmetrical, which allows for uniform stress distribution during cable use; this avoids stress concentration due to torsion and extends the service life of the reel.

[0018] 3. Both the main cable and the control cable adopt a shielded structure. The main cable uses a double shielding layer of aluminum foil and tinned copper wire braid, which greatly attenuates electromagnetic interference and ensures stable signal transmission under high current. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of one embodiment of the present invention.

[0020] The attached figures are labeled as follows:

[0021] 1—Conductor; 2—Insulation layer; 3—Shielding layer; 4—Insulation sheath; 5—Signal line unit; 6—Fiber optic unit; 7—Inner sheath; 8—Reinforcing layer; 9—Outer sheath. Detailed Implementation

[0022] The relevant technical solutions will now be clearly and completely described with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0023] like Figure 1 As shown, the high-strength wear-resistant photoelectric composite reel cable for electric engineering vehicles disclosed in this embodiment includes, from the inside out, a conductor 1, an insulation layer 2, a shielding layer 3, an insulation sheath 4, a signal line unit 5, an optical fiber unit 6, an inner sheath 7, a reinforcing layer 8, and an outer sheath 9.

[0024] Two pairs of main cable units are symmetrically arranged at the center of the cable, with signal line unit 5 and fiber optic unit 6 arranged on the sides. Each functional unit is then wrapped by an inner sheath 7, a reinforcing layer 8, and an outer sheath 9 in sequence.

[0025] The two pairs of main cable units are divided into two positive cables and two negative cables. The cable unit includes, from the inside out, a conductor 1, an insulation layer 2, a shielding layer 3, and an insulating sheath 4.

[0026] Conductor 1 is made of T1 grade (purity ≥99.98%) annealed soft copper conductor with a single wire diameter of 0.2mm. It is formed by stranding the wires together and then stranding them together. The stranding pitch ratio is ≤10D to ensure that the conductor can withstand repeated bending and movement and prevent the conductor from breaking due to a decrease in mechanical strength.

[0027] Insulation layer 2 is made of TPE material, which has the properties of being environmentally friendly, soft, temperature resistant and fatigue resistant.

[0028] The shielding layer 3 is a double shielding structure composed of aluminum foil and tin-plated copper wire, with a braiding density of ≥85%, used to attenuate electromagnetic interference.

[0029] The insulating sheath 4 is also made of TPE material, providing further protection for the internal structure.

[0030] The conductor of signal line unit 5 is a combination of multiple stranded annealed soft copper wires and Kevlar copper foil wires, which are twisted in pairs and then re-twisted into a cable. Its insulation is made of PE material and the sheath is made of TPE material, thereby improving the tensile strength of the control line unit and preventing signal failure caused by broken cores of the signal line.

[0031] Fiber unit 6 consists of 12-core 250um optical fibers inserted into a loose tube made of high modulus material, with the loose tube filled with a waterproof compound. An FRP reinforcing core is set in the center of the cable core, and the loose tube and filling rope are twisted around the central reinforcing core to form a compact and round cable core. The gaps inside the cable core are filled with water-blocking filler, and then it is longitudinally wrapped with double-sided plastic-coated steel tape, and then a polyethylene sheath is extruded to ensure the stability of optical signal transmission.

[0032] Both the inner protective layer 7 and the outer protective layer 9 are made of TPU material, which has good wear resistance to adapt to the operating environment of engineering vehicles.

[0033] The reinforcing layer 8 uses 18 twisted 600D Kevlar wires, each with a strength of ≥200N and a total strength of ≥3600N, to improve the tensile strength of the cable and prevent damage to the cable when it is repeatedly bent and subjected to stress.

[0034] This cable, as a DC reel cable, is divided into two positive and two negative cables through two pairs of main cable units. While meeting the same power transmission requirements, it reduces the cross-section of a single conductor, lowers the overall weight and bending inertia of the cable, and improves its ability to withstand repeated bending.

[0035] It integrates both optical fiber units and signal line units, enabling the use of electrical signals when optical signals fail, thus meeting the needs of informatization and intelligentization.

[0036] In addition, the cable structure is completely symmetrical, which allows for uniform stress distribution during use, avoids torsional stress concentration, and extends the service life of the drum.

[0037] The main cable features a double shielding layer of aluminum foil and tinned copper wire, combined with the structure of the signal line unit, which effectively attenuates electromagnetic interference and ensures stable signal transmission under high current.

[0038] The high-tensile Kevlar wire in the reinforcing layer, combined with the wear-resistant inner and outer sheaths, further enhances the cable's tensile and wear-resistant properties, making it suitable for high-frequency, high-impact operation scenarios of electric engineering vehicles.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-strength, wear-resistant, photoelectric composite reel cable for electric engineering vehicles, characterized in that: It includes multiple power transmission units, at least one signal transmission unit, at least one optical transmission unit, an inner sheath, a reinforcing layer, and an outer sheath; The power transmission units are symmetrically arranged in the cable cross-section between the power transmission units and between the signal transmission units and the optical transmission units, and are wrapped by the inner sheath; the reinforcing layer is disposed outside the inner sheath; the outer sheath is disposed outside the reinforcing layer; wherein, the power transmission unit is configured to transmit power and includes a positive pole unit and a negative pole unit.

2. The high-strength, wear-resistant, photoelectric composite reel cable for electric engineering vehicles as described in claim 1, characterized in that: The power transmission unit includes, from the inside out, a conductor, an insulation layer, a shielding layer, and an insulating sheath.

3. The high-strength, wear-resistant, photoelectric composite reel cable for electric engineering vehicles as described in claim 2, characterized in that: The conductor is an annealed soft copper conductor with a single wire diameter of approximately 0.2 mm. It is formed by stranding the strands together, and the twisting pitch ratio is no greater than 10D.

4. The high-strength, wear-resistant, photoelectric composite reel cable for electric engineering vehicles as described in claim 2, characterized in that: The shielding layer is a double shielding structure woven from aluminum foil and tin-plated copper wire, and the weaving density is not less than 85%.

5. The high-strength, wear-resistant, photoelectric composite reel cable for electric engineering vehicles as described in claim 1, characterized in that: The signal transmission unit includes a conductor core, which is composed of multiple stranded annealed soft copper wires and Kevlar copper foil wires, and is twisted into a cable after being twisted in pairs.

6. The high-strength, wear-resistant, photoelectric composite reel cable for electric engineering vehicles as described in claim 1, characterized in that: The optical transmission unit includes a multi-core optical fiber inserted into a loose tube, the loose tube being filled with a waterproof compound; a reinforcing core is provided at the center of the cable core, the loose tube and the filling rope are twisted around the reinforcing core to form the cable core, and the cable core is sheathed after being longitudinally wrapped with a shielding layer.

7. The high-strength, wear-resistant, photoelectric composite reel cable for electric engineering vehicles as described in claim 1, characterized in that: The reinforcing layer comprises multiple twisted Kevlar fibers, each with a strength of not less than 200N.

8. The high-strength, wear-resistant, photoelectric composite reel cable for electric engineering vehicles as described in claim 1, characterized in that: The inner and outer protective layers are made of wear-resistant polymer materials.

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