Deflection-resistant cable

Abstract

The utility model discloses a bending-resistant cable, which comprises main wire cores and filling strips, and is characterized by further comprising a support core, a wrapping layer, a braid layer and a sheath. And the main wire cores, the supporting cores and the filling strips are twisted to form the cable. And after cabling, a non-woven fabric is wrapped to form a wrapping layer. And the braid layer is formed by weaving aramid yarns outside the wrapping layer. And the sheath is extruded outside the braid layer by adopting chloroprene rubber. The cable is simple in structure, and is provided with the supporting cores, thereby greatly improving the tensile capability of the cable, and greatly improving the use safety.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a flex-resistant cable for a winch. Background Art

[0002] A winch, also known as a winch, is a lifting device that uses a drum-wound wire rope or chain to lift or pull heavy objects. Electric winches are powered by an electric motor and require electricity. When the winch's position changes during use, the power cable must be adjusted to accommodate varying distances to prevent entanglement, wear, and breakage. Therefore, the cable must be frequently bent.

[0003] Chinese patent document CN210692134U discloses a highly flex-resistant drag chain cable, comprising three insulated cores and three filler strips, the three insulated cores being arranged 120 degrees circumferentially around the cable centerline. A filler strip is provided between each of the three insulated cores, forming a cable core. The exterior of the cable core is sequentially coated with a fluororesin wrapping tape, a metal shielding layer, an inner sheath, a heat-resistant layer, and an outer sheath. The insulated core comprises an inner conductor and a PET wrapping tape and an EPDM insulation layer sequentially wrapped around the exterior of the inner conductor. The PET wrapping tape is a three-layer overlapping structure with an overlap rate of not less than 60%, and the width of the fluororesin wrapping tape is 1 to 3 times the outer diameter of the cable core. This structure relies on the insulated core itself to bear the weight of the drooping portion when bent. When the distance is long, the force applied is also greater, and there is a risk of the core being pulled apart, resulting in reduced safety during use. Utility Model Content

[0004] The purpose of the utility model is to provide a flex-resistant cable for a winch which has a simple structure and good tensile resistance.

[0005] The basic technical solution for achieving the objectives of this utility model is a flex-resistant cable comprising a main core and filler strips. The cable also includes a support core, a wrapping layer, a braided layer, and a sheath. The main core, support core, and filler strips are twisted into a cable. After the cable is formed, the wrapping layer is wrapped with non-woven fabric. The braided layer is woven with aramid yarn over the wrapping layer. The sheath is extruded with chloroprene rubber over the braided layer.

[0006] Furthermore, in order to improve the tensile strength, the support core includes a steel wire rope, a support core sheath, and a support core braided layer. The support core sheath is made of EPDM rubber extruded around the steel wire rope. The support core braided layer is made of aramid yarn woven around the support core sheath.

[0007] Furthermore, in order to facilitate bending, the filling strip is made of EPDM rubber material.

[0008] Furthermore, in order to facilitate bending, the main line core includes a conductor, a first insulating layer, a first braided layer, a first wrapping layer and a shielding layer.

[0009] The conductor is made of several twisted tinned copper wires. The first insulation layer is extruded with EPDM rubber and coated with talcum powder. The first braid is woven with aramid yarn over the first insulation layer. The first wrapping layer is wrapped with high-temperature resistant polyester tape. The shield is braided with tinned soft copper wire over the first wrapping layer and coated with talcum powder.

[0010] Furthermore, in order to improve the strength, the non-woven fabric of the wrapping layer is a reinforced non-woven fabric, one side of the reinforced non-woven fabric is a polyester surface, the other side is a cloth surface, and the polyester surface faces inward.

[0011] The utility model has the following beneficial effects: (1) The utility model has a simple structure and is provided with a support core, which greatly improves the tensile strength of the cable and greatly improves the safety of use.

[0012] (2) The first insulating layer of the present invention is made of ethylene propylene rubber, which is softer and more wear-resistant than PVC. Talc powder is applied after extrusion to reduce the binding force between the first braided layer and the first braided layer, making it easier to bend. The first braided layer is tightly and evenly wrapped around the first insulating layer. The aramid fiber has high strength and good impact resistance, corrosion resistance, and fatigue resistance.

[0013] (3) The high-temperature resistant polyester tape of the first wrapping layer of the utility model is relatively thin, and the shielding layer adopts tinned soft copper wire with a small single wire diameter, which is beneficial to reduce the constraint on the first insulating layer and improve the bending performance.

[0014] (4) The filling strip of the utility model is made of EPDM rubber and is soft and wear-resistant.

[0015] (5) The steel wire rope supporting the core of the utility model is made of soft high-strength steel material, which improves the tensile strength and is conducive to bending and retraction.

[0016] (6) The wrapping layer of the present invention adopts reinforced non-woven fabric. The polyester surface of the reinforced non-woven fabric plays the role of covering the wire core. The fabric surface has high strength and plays a reinforcing role.

[0017] (7) The braided layer of the utility model is made of aramid to form a torsion-resistant layer, which greatly improves the flexural resistance of the cable.

[0018] (8) The sheath of the utility model is made of chloroprene rubber material, which has good wear resistance, cold resistance, oil resistance and other properties, and is soft and has good resilience, which is conducive to bending and retraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic structural diagram of the flex-resistant cable of the present invention.

[0020] Figure 2 Schematic diagram of the structure of the main line core.

[0021] The reference numerals in the accompanying drawings are:

[0022] Main core 1, conductor 11, first insulation layer 12, first braided layer 13, first wrapping layer 14, shielding layer 15,

[0023] Support core 2, steel wire rope 21, support core sheath 22, support core braided layer 23,

[0024] Filling strip 3, wrapping layer 4, braided layer 5, sheath 6. DETAILED DESCRIPTION

[0025] It should be understood that the terms "upper", "lower", "inside", "outside" and the like indicating directions or positional relationships are based on the positional relationships described in the accompanying drawings and are only used to facilitate the description of the present invention or simplify the description, rather than indicating a specific direction that must be possessed.

[0026] (Example 1)

[0027] See Figure 1 The flex-resistant cable of the present invention comprises a main core 1, a supporting core 2, a filling strip 3, a wrapping layer 4, a braided layer 5 and a sheath 6. The main core 1, the supporting core 2 and the filling strip 3 are twisted into a cable.

[0028] The main core 1 includes a conductor 11, a first insulating layer 12, a first braided layer 13, a first wrapping layer 14, and a shielding layer 15. In this embodiment, there are two main cores 1, and the two main cores 1 have the same structure.

[0029] The conductor 11 is made of a number of twisted tinned copper wires, which are Class 6 conductors. The first insulating layer 12 is extruded with EPDM rubber and coated with talcum powder. The first braided layer 13 is woven with aramid yarns on the outside of the first insulating layer 12, with a weaving density greater than or equal to 82%. The first wrapping layer 14 is wrapped with high-temperature resistant polyester tape on the outside of the first braided layer 13. The thickness of the high-temperature resistant polyester tape is 0.02-0.036 mm, and in this embodiment it is 0.026 mm. The wrapping overlap rate is 15%-30%, and in this embodiment it is 20%. The shielding layer 15 is woven with tinned soft copper wire on the outside of the first wrapping layer 14. The diameter of the tinned copper wire is 0.15-0.18 mm, and in this embodiment it is 0.16 mm. The weaving density is greater than or equal to 88%. The shielding layer 15 is coated with talcum powder to reduce friction and improve bending performance.

[0030] The support core 2 includes a steel wire rope 21, a support core sheath 22 and a support core braided layer 23. There are two support cores 2 in this embodiment, and the two support cores 2 have the same structure. The steel wire rope 21 is made of soft high-strength steel material, and the soft high-strength steel material is a prefabricated soft high-strength steel material that meets the requirements of AS3569. The outer diameter of the steel wire rope 21 is 1.0 to 2.0 mm, and 1.5 mm in this embodiment. The support core sheath 22 is extruded with ethylene propylene rubber on the outside of the steel wire rope 21. The support core braided layer 23 is woven with aramid yarn on the outside of the support core sheath 22, and the braiding density is greater than or equal to 82%. The support core braided layer 23 is coated with talcum powder to reduce friction and improve bending performance.

[0031] There are five filling strips 3, made of EPDM, which is soft and wear-resistant. After extrusion, the filling strips 3 are coated with talcum powder to reduce friction and improve bending performance. The main core 1 and support core 2 are arranged around one of the filling strips 3, and the remaining four filling strips 3 are arranged between adjacent main cores 1 and support cores 2. The main core 1, support core 2, and four filling strips are twisted together around a central filling strip 3 to form a cable. After the cable is formed, it is wrapped with non-woven fabric to form a wrapping layer 4. The reinforced non-woven fabric has one polyester surface and one cloth surface, with the polyester facing inward. The wrapping overlap ratio is 15%-30%, and in this embodiment, it is 20%.

[0032] The braided layer 5 is braided on the outside of the wrapping layer 4 using aramid yarn, and the braiding density is greater than or equal to 82%.

[0033] The sheath 6 is made of chloroprene rubber and is extruded outside the braided layer 5, with a thickness of greater than or equal to 2.5 mm.

[0034] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A flex-resistant cable, comprising a main core (1) and a filling strip (3), characterized in that: It also includes a supporting core (2), a wrapping layer (4), a braided layer (5) and a sheath (6); the main line core (1), the supporting core (2) and the filling strip (3) are twisted into a cable; after the cable is formed, a non-woven fabric is wrapped around the wrapping layer (4); the braided layer (5) is braided with aramid yarn outside the wrapping layer (4); and the sheath (6) is extruded with chloroprene rubber outside the braided layer (5).

2. The flex-resistant cable according to claim 1, characterized in that: The support core (2) comprises a steel wire rope (21), a support core sheath (22) and a support core braided layer (23); the support core sheath (22) is extruded and wrapped with ethylene propylene rubber outside the steel wire rope (21); and the support core braided layer (23) is braided with aramid yarn outside the support core sheath (22).

3. The flex-resistant cable according to claim 1, characterized in that: The filling strip (3) is made of EPDM rubber.

4. The flex-resistant cable according to claim 1, characterized in that: The main line core (1) comprises a conductor (11), a first insulating layer (12), a first braided layer (13), a first wrapping layer (14) and a shielding layer (15); The conductor (11) is formed by twisting a plurality of tinned copper wires; the first insulating layer (12) is formed by extruding ethylene propylene rubber outside the conductor (11), and talcum powder is coated after extrusion; the first braided layer (13) is braided with aramid yarn outside the first insulating layer (12), the first wrapping layer (14) is wrapped with a high-temperature resistant polyester tape outside the first braided layer (13), the shielding layer (15) is braided with tinned soft copper wire outside the first wrapping layer (14), and talcum powder is coated outside the shielding layer (15).

5. The flex-resistant cable according to claim 1, characterized in that: The non-woven fabric of the wrapping layer (4) is a reinforced non-woven fabric, one side of the reinforced non-woven fabric is a polyester surface, the other side is a cloth surface, and the polyester surface faces inwards.

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