Flexible cable for supplying power to cold-resistant and fracture-resistant motor with rated voltage of 450 / 750V

Abstract

The utility model belongs to the technical field of cables, and particularly relates to a flexible cable for supplying power to a cold-resistant and fracture-resistant motor with rated voltage of 450 / 750V. The cable comprises a reinforcing core and a plurality of cable cores, the cable cores are twisted around the periphery of the reinforcing core, each cable core comprises a first reinforcing core and a plurality of wires, and the wires are twisted around the periphery of the first reinforcing core; the first belting layer is wrapped on the periphery of the plurality of cable cores; the filling layer is filled between the first belting layer and the cable core; the reinforcing layer wraps the periphery of the belting layer, and a plurality of second reinforcing cores are arranged in the reinforcing layer at intervals in the circumferential direction; and the outer sheath is arranged at the outer side of the enhancement layer. The utility model is used for solving the problem that the strength of a mobile cable is low in a high mechanical load occasion.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cable technical field, concretely relates to a kind of 450 / 750V rated voltage cold-resistant anti-fracture motor power supply soft cable. BACKGROUND

[0002] The power supply cable for motor in wind turbine generator has high weather resistance and excellent mechanical properties, which makes it have good application prospect in power supply and portable receiver power supply operating in indoor, outdoor and especially difficult environmental conditions (such as exposure to wear, bending, dragging, changing temperature, etc.).

[0003] However, in some high mechanical load use occasions, the current power cable is still lacking in firmness, high recoil force and other aspects. SUMMARY

[0004] In view of the deficiencies of the prior art, a 450 / 750V rated voltage cold-resistant anti-fracture motor power supply soft cable is provided to solve the problem of low strength of mobile cable in high mechanical load occasions.

[0005] The technical solution of the utility model to solve the above technical problems is as follows: the 450 / 750V rated voltage cold-resistant anti-fracture motor power supply soft cable comprises:

[0006] A reinforcing core;

[0007] A plurality of cable cores are twisted around the outer periphery of the reinforcing core, and the cable core comprises:

[0008] A first reinforcing core;

[0009] A plurality of conductive wires are twisted around the outer periphery of the first reinforcing core;

[0010] A first tape layer is wrapped around the outer periphery of the plurality of cable cores;

[0011] A filling layer is filled between the first tape layer and the cable core;

[0012] An enhancement layer is wrapped around the outer periphery of the tape layer, and a plurality of second reinforcing cores are arranged in the enhancement layer along the circumferential direction at intervals;

[0013] An outer sheath is arranged on the outer side of the enhancement layer.

[0014] Compared with the prior art, the above technical solution has the following beneficial effects:

[0015] The strength of the cable is improved by arranging the reinforcing core in the center of the cable, arranging the cable core around the reinforcing core, and arranging the first reinforcing core in the center of the cable core.

[0016] Based on the above technical solution, the embodiment of the application can also be improved as follows:

[0017] In an embodiment, the reinforcing core comprises a third reinforcing core and an elastic layer covering the third reinforcing core.

[0018] In an embodiment, the wire comprises a conductor, a second wrapping layer wrapping the conductor, and an insulating layer wrapping the second wrapping layer.

[0019] In an embodiment, the insulating layer is a low-temperature-resistant ethylene-propylene rubber insulating layer.

[0020] In an embodiment, the first reinforcing core, the second reinforcing core, and the third reinforcing core are all aramid fiber reinforcing cores, and the aramid fiber reinforcing core has a tensile strength of ≥110N, an elongation of ≥15%, and a toughness of ≥80cN / tex.

[0021] In an embodiment, the filling layer is a twisted polypropylene filling layer, and the filling layer has a breaking strength of >80N and a water content of not more than 1%.

[0022] In an embodiment, the first wrapping layer is a non-woven fabric wrapping layer, and the wrapping layer has a plastic surface facing inwards and a rough surface facing outwards.

[0023] In an embodiment, the material of the reinforcing layer and the outer sheath is aromatic hydrocarbon hard segment polyether soft segment polyurethane. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed in the specific embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0025] Figure 1 The figure is a schematic diagram of the overall structure of the present application.

[0026] Reference signs:

[0027] 1, reinforcing core; 2, cable; 3, filler layer; 4, first tape layer; 5, reinforcing layer; 6, outer jacket, 7, second reinforcing core;

[0028] 101, third reinforcing core; 102, elastic layer;

[0029] 201, first reinforcing core; 202, wire; 2021, conductor; 2022, second tape layer; 2023, insulating layer. DETAILED DESCRIPTION

[0030] The technical scheme of the present application will be described in detail below with reference to the drawings. The following examples are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0031] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by the technical personnel in the field to which the present application belongs.

[0032] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0034] In the present application, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] Embodiment

[0036] As Figure 1As shown, the utility model provides a kind of rated voltage 450 / 750V cold-resistant fracture-resistant motor power supply soft cable, it includes: reinforcing core 1, five cable core 2, filling layer 3, first tape layer 4, reinforcing layer 5 and outer sheath 6.

[0037] The cable core 2 is stranded around the outer periphery of the reinforcing core 1, and the cable core 2 includes a first reinforcing core 201 and a plurality of conductive wires 202 stranded around the outer periphery of the first reinforcing core 201.

[0038] The conductive wire 202 includes a conductor 2021, a second tape layer 2022 wrapped around the outer side of the conductor 2021, and an insulation layer 2023 wrapped around the outer side of the second tape layer 2022.

[0039] The second tape layer 2022 is specifically a matte light non-woven fabric, which prevents oxidation of the conductor 2021 and maintains the roundness of the conductor 2021.

[0040] The insulation layer 2023 is a low-temperature-resistant ethylene-propylene rubber insulation layer 2023, specifically a soft ethylene-propylene rubber insulation material resistant to low temperature and cracking at -40°C, with a Shore hardness of 70-80A.

[0041] The first tape layer 4 is wrapped around the outer periphery of the plurality of cable cores 2, and the first tape layer 4 is a high-strength composite non-woven fabric tape layer wrapped around the outer periphery of the cable, with the plastic side facing in and the rough side facing out.

[0042] The filling layer 3 is filled between the first tape layer 4 and the cable core 2, and the filling layer 3 is a twisted polypropylene filling layer 3 with a breaking strength >80N and a moisture content not exceeding 1%.

[0043] The reinforcing layer 5 is wrapped around the outer periphery of the tape layer, and a plurality of second reinforcing cores 7 are arranged in the reinforcing layer 5 along the circumferential direction.

[0044] Specifically, the reinforcing layer 5 is made of polyurethane with a strength ≥50MPa, and six second reinforcing cores 7 are evenly and intervally arranged around the semi-product before extrusion.

[0045] The outer sheath 6 is arranged on the outer side of the reinforcing layer 5.

[0046] Specifically, the outer sheath 6, the reinforcing layer 5 and the material of the outer sheath 6 adopt aromatic hydrocarbon hard segment polyether soft segment polyurethane, which can resist low temperature to-60℃, and the Shore hardness is between 75-85A, which meets the basic performance specified in EN 50363-10-2, and has certain tensile strength and low-temperature softness.

[0047] To meet the requirements of finished cable tensile (elongation ≤10%) and breaking load (hanging weight ≥125kg), the material of the outer sheath 6 and the reinforcing layer 5 inside it is selected to be high-strength and high-tear-resistant aromatic hydrocarbon hard segment polyether soft segment polyurethane material, which can ensure that the finished cable does not break under the weight of ≥125kg for 3min, and the sheath elongation is ≤10% under the weight of ≥60kg for 30min.

[0048] By arranging the reinforcing core 1 at the center of the cable, the cable core 2 is arranged around the reinforcing core 1, and the first reinforcing core 201 is arranged at the center of the cable core 2, which improves the strength of the cable. In addition, a plurality of second reinforcing cores 7 are arranged in the reinforcing layer 5, which improves the structural strength of the cable. By forming a multi-layer protection structure by the reinforcing core 1, the first reinforcing core 201 and the second reinforcing core 7 arranged outwardly, the overall structural strength of the cable is improved.

[0049] In the embodiment, the reinforcing core 1 includes a third reinforcing core 101 and an elastic layer 102 covering the third reinforcing core 101.

[0050] The first reinforcing core 201, the second reinforcing core 7 and the third reinforcing core 101 are all aramid fiber reinforcing cores, and the tensile strength of the aramid fiber reinforcing core is ≥110N, the elongation is ≥15%, and the toughness is ≥80cN / tex.

[0051] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. Cold-resistant, break-resistant flexible cable for the supply of motors with a rated voltage of 450 / 750 V, characterized in that The application relates to a cable, which comprises: a reinforcing core; a plurality of cable cores, the plurality of cable cores being twisted around the periphery of the reinforcing core, the cable core comprising: a first reinforcing core; a plurality of wires twisted around the periphery of the first reinforcing core; a first wrapping layer wrapped around the periphery of the plurality of cable cores; a filling layer filled between the first wrapping layer and the cable core; a reinforcing layer wrapped around the periphery of the wrapping layer, the reinforcing layer being provided with a plurality of second reinforcing cores at intervals in the circumferential direction; an outer sheath provided outside the reinforcing layer.

2. The cold-resistant, fracture-resistant flexible cable for motor supply with a voltage rating of 450 / 750 V according to claim 1, characterized in that The reinforcing core comprises a third reinforcing core and an elastic layer wrapped outside the third reinforcing core.

3. The cold-resistant, fracture-resistant flexible cable for motor supply with a voltage rating of 450 / 750 V according to claim 1, characterized in that The wire comprises a conductor, a second wrapping layer wrapped outside the conductor, and an insulating layer wrapped outside the second wrapping layer.

4. A cold-resistant, fracture-resistant flexible cable for motor supply with a voltage rating of 450 / 750 V according to claim 3, characterized in that The insulating layer is a low-temperature-resistant ethylene-propylene rubber insulating layer.

5. The cold-resistant, fracture-resistant flexible cable for motor supply with a voltage rating of 450 / 750 V according to claim 2, characterized in that, The first reinforcing core, the second reinforcing core and the third reinforcing core are all aramid fiber reinforcing cores, the tensile strength of the aramid fiber reinforcing core is greater than or equal to 110N, the elongation is greater than or equal to 15%, and the toughness is greater than or equal to 80 cN / tex.

6. The cold-resistant, fracture-resistant flexible cable for motor supply with a voltage rating of 450 / 750 V according to claim 2, characterized in that The filling layer is a twisted polypropylene filling layer, the breaking strength of the filling layer is greater than 80N, and the water content is not more than 1%.

7. The cold-resistant, fracture-resistant flexible cable for motor supply with a voltage rating of 450 / 750 V according to claim 1, characterized in that, The first wrapping layer is a non-woven fabric wrapping layer, the plastic surface of the wrapping layer faces inwards, and the rough surface faces outwards.

8. The cold-resistant, fracture-resistant flexible cable for motor supply with a voltage rating of 450 / 750 V according to claim 1, characterized in that, The material of the reinforcing layer and the outer sheath is aromatic hydrocarbon hard segment polyether soft segment polyurethane.

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