High-wear-resistance tensile drag cable

Abstract

The invention relates to the technical field of power cables, and provides a high-wear-resistance tensile drag cable which comprises a conductor, an insulating layer and a sheath layer are sequentially arranged on the outer side of the conductor, and the sheath layer is prepared from, by weight, 60-80 parts of nitrile rubber, 10-20 parts of filler, 3-5 parts of plasticizer, 1-3 parts of antioxidant and 1-2 parts of vulcanizing agent; and the acrylonitrile content of the nitrile rubber is 27-32 wt%. According to the technical scheme, the problems of low wear resistance and low tensile strength of the dragging cable in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, and in particular to a highly wear-resistant and tensile-resistant drag cable. Background Art

[0002] Drag cable is a special cable designed for frequent movement, bending, stretching and mechanical stress environments. It has a wide range of applications in the industrial field. For example, in port cranes, cables need to move and bend continuously as the crane rises and falls and translates; on stackers in automated logistics warehousing systems, cables need to follow the equipment as it shuttles between shelves, and are frequently stretched and rubbed; in mining equipment, cables are dragged on the surface of ore or pulled by equipment. During frequent movement and stretching, if the cable has insufficient wear resistance and poor tensile strength, the cable sheath can easily be worn, exposing the internal conductive core wire, increasing the risk of electrical faults such as leakage and short circuit, which will not only stop the equipment from working and affect production efficiency, but may also endanger the safety of operators. Therefore, improving the wear resistance and tensile strength of drag cables is an issue that needs to be addressed urgently. Summary of the invention

[0003] The present invention provides a highly wear-resistant and tensile-resistant dragging cable, which solves the problems of low wear resistance and low tensile strength of the dragging cable in the related art.

[0004] The technical solution of the present invention is as follows: The present invention provides a highly wear-resistant and tensile-resistant drag cable, comprising a conductor, an insulating layer and a sheath layer are sequentially arranged on the outer side of the conductor, and the sheath layer comprises the following component raw materials in parts by weight: 60-80 parts of nitrile rubber, 10-20 parts of filler, 3-5 parts of plasticizer, 1-3 parts of antioxidant, and 1-2 parts of vulcanizer; The acrylonitrile content of the nitrile rubber is 27wt%-32wt%.

[0005] As a further technical solution, the conductor is made of copper.

[0006] As a further technical solution, the insulating layer is an EPDM rubber insulating layer.

[0007] As a further technical solution, the raw material also includes 5 to 10 parts of reinforcing fiber.

[0008] As a further technical solution, the reinforcing fiber includes one or more of glass fiber, carbon fiber, and Kevlar fiber.

[0009] As a further technical solution, when the reinforcing fiber is Kevlar fiber, the Kevlar fiber is modified Kevlar fiber, and the modifier of the modified Kevlar fiber is a nitrogen-containing benzonitrile compound.

[0010] In the present invention, modified Kevlar fiber modified by a nitrogen-containing benzonitrile compound is added as a reinforcing fiber to enhance the surface activity of the Kevlar fiber. The interaction between the modified Kevlar fiber and the nitrile rubber matrix is ​​used to enhance the bonding strength between the two, improve the interface compatibility, and thus improve the wear resistance and tensile strength of the drag cable.

[0011] As a further technical solution, the nitrogen-containing benzonitrile compound includes one or more of 4-anilinobenzonitrile, p-aminophenylacetonitrile, and 2-amino-4-(1-trityl-1H-imidazol-5-yl)butyronitrile.

[0012] In the present invention, 4-anilinobenzonitrile is preferably used as the modifier, and the obtained modified Kevlar fiber has better reactivity and conjugated system stability, further improving the wear resistance and tensile strength of the drag cable.

[0013] As a further technical solution, in the raw material of the modified Kevlar fiber, the mass ratio of the modifier to the Kevlar fiber is 2-3:40.

[0014] As a further technical solution, the preparation method of the modified Kevlar fiber comprises the following steps: dispersing the modifier in a solvent, adding the Kevlar fiber, impregnating and modifying the fiber, and then drying the modified Kevlar fiber.

[0015] As a further technical solution, the filler includes one or more of talc powder, mica powder, and kaolin.

[0016] As a further technical solution, the plasticizer includes one or more of dicyclohexyl phthalate, dioctyl adipate, and tricresyl phosphate.

[0017] As a further technical solution, at least one of the following technical features is also included: The antioxidant includes one or more of antioxidant 2246, antioxidant 4020, and antioxidant 1076; The vulcanizing agent includes one or more of dicumyl peroxide, benzoyl peroxide, and tert-butyl perbenzoate.

[0018] The present invention also provides a method for preparing a highly wear-resistant and tensile-resistant drag cable, comprising the following steps: S1, mixing the raw materials of the sheath layer uniformly, and extruding to obtain a sheath layer; S2. Wrap the insulation layer and the sheath layer around the conductor in sequence to obtain a cable.

[0019] As a further technical solution, the extrusion temperature is 140-160°C.

[0020] The working principle and beneficial effects of the present invention are: In the present invention, the cable sheath layer is prepared with nitrile rubber as raw material, and the acrylonitrile content of the nitrile rubber is limited, the polar interaction force between the nitrile rubber molecules is adjusted, and the stability of the internal structure of the sheath layer and the effective dispersion of stress are enhanced, thereby enhancing the wear resistance and tensile strength of the drag cable. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the following examples and comparative examples: Conductor: Material is copper; Insulation layer: EPDM rubber insulation layer; Carbon fiber: 5μm in diameter, 1mm in length; Kevlar fiber: The model is 400D and the length is 1mm.

[0023] Example 1 A method for preparing a highly wear-resistant and tensile-resistant drag cable comprises the following steps: S1, weigh 60 parts of nitrile rubber, 10 parts of talc, 3 parts of dicyclohexyl phthalate, 1 part of antioxidant 2246, and 1 part of dicumyl peroxide, mix them evenly, extrude them at 140° C. to obtain a sheath layer, wherein the acrylonitrile content of the nitrile rubber is 27wt%; S2. Wrap the insulation layer and the sheath layer around the conductor in sequence to obtain a cable.

[0024] Example 2 A method for preparing a highly wear-resistant and tensile-resistant drag cable comprises the following steps: S1, weigh 70 parts of nitrile rubber, 15 parts of mica powder, 4 parts of dioctyl adipate, 2 parts of antioxidant 4020, and 1.5 parts of benzoyl peroxide, mix them evenly, and extrude them at 150° C. to obtain a sheath layer, wherein the acrylonitrile content of the nitrile rubber is 27wt%; S2. Wrap the insulation layer and the sheath layer around the conductor in sequence to obtain a cable.

[0025] Example 3 A method for preparing a highly wear-resistant and tensile-resistant drag cable comprises the following steps: S1, weigh 80 parts of nitrile rubber, 20 parts of kaolin, 5 parts of tricresyl phosphate, 3 parts of antioxidant 1076, and 2 parts of tert-butyl perbenzoate, mix them evenly, and extrude them at 160° C. to obtain a sheath layer, wherein the acrylonitrile content of the nitrile rubber is 27wt%; S2. Wrap the insulation layer and the sheath layer around the conductor in sequence to obtain a cable.

[0026] Example 4 Compared with Example 2, the difference of Example 4 is that the acrylonitrile content of the nitrile rubber is 32wt%.

[0027] Example 5 A method for preparing a highly wear-resistant and tensile-resistant drag cable comprises the following steps: S1, weigh 70 parts of nitrile rubber, 15 parts of mica powder, 4 parts of dioctyl adipate, 2 parts of antioxidant 4020, 1.5 parts of benzoyl peroxide, and 5 parts of carbon fiber, mix them evenly, extrude them at 150° C. to obtain a sheath layer, wherein the acrylonitrile content of the nitrile rubber is 32wt%; S2. Wrap the insulation layer and the sheath layer around the conductor in sequence to obtain a cable.

[0028] Example 6 Compared with Example 5, Example 6 is different in that the carbon fiber is replaced by an equal amount of Kevlar fiber.

[0029] Example 7 Compared with Example 6, the difference in Example 7 is that the added amount of Kevlar fiber is 10 parts.

[0030] Example 8 The preparation method of the modified Kevlar fiber comprises the following steps: dispersing 1 part of 4-anilinobenzonitrile in 200 parts of acetone, adding 20 parts of Kevlar fiber, immersing for 6 hours for modification, and drying to obtain the modified Kevlar fiber.

[0031] Compared with Example 7, the difference of Example 8 is that the Kevlar fiber is replaced by an equal amount of modified Kevlar fiber obtained by the above preparation method.

[0032] Example 9 Compared with Example 8, the difference in Example 9 is that the added amount of 4-anilinobenzonitrile is 1.5 parts.

[0033] Example 10 Compared with Example 9, Example 10 is different in that 4-anilinobenzonitrile is replaced by an equal amount of p-aminophenylacetonitrile.

[0034] Embodiment 11 Compared with Example 9, Example 11 is different in that 4-anilinobenzonitrile is replaced with an equal amount of 2-amino-4-(1-trityl-1H-imidazol-5-yl)butanenitrile.

[0035] Comparative Example 1 Compared with Example 2, the difference in Comparative Example 1 is that the acrylonitrile content of the nitrile rubber is 19 wt %.

[0036] Comparative Example 2 Compared with Example 2, the difference of Comparative Example 2 is that the acrylonitrile content of the nitrile rubber is 49wt%.

[0037] The sheath layers of the drag cables prepared in Examples 1 to 11 and Comparative Examples 1 to 2 were tested according to the following method: 1. Abrasion index: According to the test method specified in GB / T 1689-2014 "Determination of wear resistance of vulcanized rubber (using Akron abrasion tester)", the abrasion index of the test sample is tested.

[0038] 2. Tensile strength: Test the tensile strength of the sample according to the test method specified in GB / T 528-2009 "Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber".

[0039] The test results are shown in the following table: Table 1 Performance test results of the sheath layer of the drag cables prepared in Examples 1 to 11 and Comparative Examples 1 to 2

[0040] Compared with Comparative Examples 1 and 2, Examples 2 and 4 add nitrile rubber with different acrylonitrile contents as raw materials. As a result, the wear index of Examples 2 and 4 is smaller than that of Comparative Examples 1 and 2, and the tensile strength is greater than that of Comparative Examples 1 and 2, indicating that when the acrylonitrile content in the nitrile rubber is 27wt%~32wt%, the wear resistance and tensile strength of the obtained drag cable are better.

[0041] Compared with Example 4, Examples 5 to 7 add reinforcing fibers. As a result, the wear index of Examples 5 to 7 is smaller than that of Example 4, and the tensile strength is greater than that of Example 4, indicating that when reinforcing fibers are added to the raw materials, the wear resistance and tensile strength of the drag cable can be improved.

[0042] Compared with Example 7, Examples 8 to 11 added modified Kevlar fibers modified by nitrogen-containing benzonitrile compounds. As a result, the abrasion index of Examples 8 to 11 was smaller than that of Example 7, and the tensile strength was greater than that of Example 7, indicating that the addition of modified Kevlar fibers modified by nitrogen-containing benzonitrile compounds can improve the wear resistance and tensile strength of the drag cable.

[0043] Compared with Example 9, Examples 10 and 11 added modified Kevlar fibers modified by different nitrogen-containing benzonitrile compounds. As a result, the abrasion index of Example 9 was smaller than that of Examples 10 and 11, and the tensile strength was greater than that of Examples 10 and 11, indicating that when the nitrogen-containing benzonitrile compound is preferably 4-anilinobenzonitrile, the wear resistance and tensile strength of the obtained drag cable are better.

[0044] The above are only preferred embodiments of the present invention and are 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 protection scope of the present invention.

Claims

1. A highly wear-resistant and tensile-resistant drag cable, characterized in that: The invention comprises a conductor, wherein an insulating layer and a sheath layer are sequentially arranged on the outer side of the conductor, wherein the sheath layer comprises the following component raw materials in parts by weight: 60-80 parts of nitrile rubber, 10-20 parts of filler, 3-5 parts of plasticizer, 1-3 parts of antioxidant, and 1-2 parts of vulcanizer; and the acrylonitrile content of the nitrile rubber is 27wt%-32wt%.

2. A highly wear-resistant and tensile-resistant drag cable according to claim 1, characterized in that: The raw materials also include 5 to 10 parts of reinforcing fibers.

3. A highly wear-resistant and tensile-resistant drag cable according to claim 2, characterized in that: The reinforcing fibers include one or more of glass fibers, carbon fibers, and Kevlar fibers.

4. A highly wear-resistant and tensile-resistant drag cable according to claim 3, characterized in that: When the reinforcing fiber is Kevlar fiber, the Kevlar fiber is modified Kevlar fiber, and the modifier of the modified Kevlar fiber is a nitrogen-containing benzonitrile compound.

5. A highly wear-resistant and tensile-resistant drag cable according to claim 4, characterized in that: The nitrogen-containing benzonitrile compound includes one or more of 4-anilinobenzonitrile, p-aminophenylacetonitrile, and 2-amino-4-(1-trityl-1H-imidazol-5-yl)butyronitrile.

6. A highly wear-resistant and tensile-resistant drag cable according to claim 4, characterized in that: In the raw material of the modified Kevlar fiber, the mass ratio of the modifier to the Kevlar fiber is 2-3:

40.

7. A highly wear-resistant and tensile-resistant drag cable according to claim 4, characterized in that: The preparation method of the modified Kevlar fiber comprises the following steps: dispersing a modifier in a solvent, adding Kevlar fiber, impregnating and modifying the fiber, and then drying the modified Kevlar fiber.

8. A highly wear-resistant and tensile-resistant drag cable according to claim 1, characterized in that: The filler includes one or more of talc powder, mica powder and kaolin.

9. A highly wear-resistant and tensile-resistant drag cable according to claim 1, characterized in that: The plasticizer includes one or more of dicyclohexyl phthalate, dioctyl adipate, and tricresyl phosphate.

10. A highly wear-resistant and tensile-resistant drag cable according to claim 1, characterized in that: Also includes at least one of the following technical features: The antioxidant includes one or more of antioxidant 2246, antioxidant 4020, and antioxidant 1076; The vulcanizing agent includes one or more of dicumyl peroxide, benzoyl peroxide, and tert-butyl perbenzoate.

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