Flexible tensile high-temperature-resistant crosslinked ethylene propylene rubber power cable

Abstract

The utility model relates to a flexible tensile high temperature resistant crosslinked ethylene propylene rubber power cable, which comprises a filling core, insulating single wires, reinforcing cores, a wrapping layer, a shielding layer and a sheath, a plurality of insulating single wires and a plurality of reinforcing cores are arranged outside the filling core to form a cable core, and the wrapping layer, the shielding layer and the sheath are sequentially arranged outside the cable core; each insulating single wire is formed by arranging a 150 DEG C cross-linked ethylene propylene rubber insulating layer outside a 48 / 0.20 mm tinned copper conductor. The cable has the characteristics of temperature resistance, softness and strong tensile property.

Description

Technical Field

[0001] The utility model relates to a soft, tensile-resistant, high-temperature-resistant cross-linked ethylene-propylene rubber power cable, in particular to a connecting cable for medium-low voltage and high-voltage power systems, which is used in the fields of power, control or data signal transmission. Background Art

[0002] The installation environment of motor power cables is usually complex. For example, motor power cables in cable-dense areas, cable trenches and cable tunnels are easily affected by environmental factors and cause motor operation failures. Existing motor power cables are relatively hard and have poor bending performance. They are not flexible enough during installation and are difficult to move and lay. They are easy to break and cause electrical interference. After long-term use, they will fail for various reasons, causing interruptions in the operating system and seriously affecting production.

[0003] Since the motor power cable works for a long time in an environment where the winding motor is connected to the casing, the temperature rise of the motor winding is large. In addition, due to the large current in the power cable, the temperature resistance of traditional motor power cables is usually 70-90℃, which can no longer meet the temperature requirements and affects the transmission of signals and electrical energy.

[0004] After the motor power cable is connected to the motor, it crosses a large number of components. The cable is easily broken during the laying process. It does not have tensile properties and may break inside the cable, seriously affecting the transmission characteristics and service life of the cable. Summary of the invention

[0005] In view of the shortcomings of the motor control cables in the prior art, such as poor practicality, lack of tensile performance, low temperature resistance, difficulty in bending, and easy damage during use, thus causing safety hazards, the utility model provides a soft, tensile-resistant and high-temperature resistant cross-linked EPDM rubber power cable, which has the characteristics of temperature resistance, softness and strong tensile resistance.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a soft, tensile-resistant and high-temperature-resistant cross-linked EPDM rubber power cable, comprising a filling core, an insulating single wire, a reinforcing core, a wrapping layer, a shielding layer and a sheath, wherein a plurality of insulating single wires and a plurality of reinforcing cores are arranged outside the filling core to form a cable core, and a wrapping layer, a shielding layer and a sheath are arranged outside the cable core in sequence; the insulating single wire is composed of a 48 / 0.20mm tinned copper conductor and a 150°C cross-linked EPDM rubber insulation layer is arranged outside the conductor.

[0007] The beneficial effect of the utility model is that the cable fully considers the requirements of the use occasions, adopts a combination of multiple strands of twisted soft conductors and multiple strands of tinned copper wires for braiding, and a reinforcing core adopts high-strength soft galvanized steel wires, thereby improving the flexibility of the cable and the installation performance of the motor.

[0008] The cable insulation, sheath and core filling materials all use a combination of 150℃ high temperature resistant EPDM rubber to meet the high temperature resistance requirements, ensuring that the motor power cable can still operate safely in a complex working environment with rising temperatures. The working temperature of the motor power cable is increased from 70-90℃ to 150℃.

[0009] Taking into account the insufficient tensile strength of the motor power cable, a reinforcing core structure of high-strength soft galvanized steel wire is adopted to improve the tensile strength of the cable, ensure the laying of the motor power cable in a complex installation environment, and increase the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of the utility model cable;

[0011] Figure 2 It is a structural schematic diagram of the insulated single wire of the utility model. DETAILED DESCRIPTION

[0012] like Figure 1 As shown, a soft, tensile-resistant, high-temperature-resistant cross-linked EPDM rubber power cable comprises a core filler 1, an insulating single wire 2, a reinforcing core 3, a wrapping layer 4, a shielding layer 5 and a sheath 6; six insulating single wires 2 and four 150°C EPDM rubber core fillers 1 are arranged outside a 150°C EPDM core filler 1 to form a cable core, a wrapping layer 4 is wrapped outside the core filler 1, a shielding layer 5 is woven outside the wrapping layer 4, and a sheath 6 is extruded outside the shielding layer 5.

[0013] like Figure 2 As shown, the insulated single wire 2 is composed of a 48 / 0.20 mm tinned copper conductor 2-1 and an outer layer of a 150°C cross-linked EPDM rubber insulation layer 2-2, which improves the temperature resistance of the cable.

[0014] The core filler 1 is a 150°C cross-linked EPDM rubber core filler, which is consistent with the materials of the insulation layer 2-2 and the sheath 6, ensuring the roundness and temperature resistance of the cable; the structural design of the core filler makes the product structure more compact and has good mechanical properties. Reasonable filling improves the bending angle and tensile strength of the cable.

[0015] The cross section of conductor 2-1 is 1.5 mm 2 The tinned copper conductor is a 48 / 0.20mm tinned copper conductor twisted together with 6 insulated wires to form a soft cable structure. The cable is resistant to bending and not easy to damage, meeting the bending and moving installation requirements of the motor control system. Through the soft and optimized structural design, the pressure on the cable can be avoided, the cavitation caused by excessive stress can be reduced, and the ambient temperature and service life can be improved. The twisted conductor structure design makes the cable soft and ensures tensile strength, which can avoid mechanical damage that is not found during cable installation and bending, and fire, affecting the power control system.

[0016] The insulation layer 2-2 is made of 150℃ ethylene propylene rubber, which makes the motor control cable have excellent long-term working temperature. The temperature grade of cable insulation and sheath is 150℃. The heat resistance of this insulation material determines that the cable can withstand a higher current carrying capacity. The use of radiation cross-linking technology improves the mechanical and chemical properties of the cable, including high and low temperature resistance, heat deformation resistance, and softness.

[0017] The tensile strength of the reinforcing core 3 is 500N / mm 2 The soft galvanized steel wire reinforcement core ensures that the cable's tensile strength is far greater than that of ordinary control cables, and it is more flexible and elastic. The cable's tensile strength makes it safer during the laying process, and the motor control cable has a longer service life, avoiding premature breakage and electrical accidents. The tensile strength of ordinary 6-core control cables of the same specification is 150N / mm 2 The utility model forms a tensile structure by combining soft galvanized steel wire and stranded conductor, and the tensile strength reaches 500N / mm 2 Soft galvanized steel wire is more suitable for installation and laying, with higher mechanical strength than ordinary control cables, and the internal tensile design can improve the practicality of the cable.

[0018] The wrapping layer 4 is a polyester film wrapping layer.

[0019] The shielding layer 5 is a tinned copper shielding layer, and the shielding adopts the form of braided shielding, which not only ensures the shielding of the motor power cable itself, but also ensures the needs of bending and movement, and can withstand more bending times under high-speed movement.

[0020] The sheath 6 is a 150°C cross-linked ethylene propylene rubber sheath. The high-quality elastic and high-temperature resistant sheath makes the motor power cable highly flexible and has a large bending radius, and has the characteristics of being used in a wider range of occasions.

Claims

1. A soft, tensile, high temperature resistant cross-linked EPDM rubber power cable, characterized by: The cable comprises a filling core (1), an insulating single wire (2), a reinforcing core (3), a wrapping layer (4), a shielding layer (5) and a sheath (6); the filling core (1) is provided with a plurality of insulating single wires (2) and a plurality of reinforcing cores (3) to form a cable core; the cable core is provided with a wrapping layer (4), a shielding layer (5) and a sheath (6) in sequence; The insulated single wire (2) is composed of a 48 / 0.20 mm tinned copper conductor (2-1) with a 150° C. cross-linked ethylene propylene rubber insulation layer (2-2) provided on the outside; The cable core is composed of a 150°C ethylene propylene rubber filling core (1) with six insulating single wires (2) and four high-strength soft galvanized steel wire reinforcement cores (3); The reinforcing core (3) is a soft galvanized steel wire reinforcing core; The wrapping layer (4) is a polyester film wrapping layer; The shielding layer (5) is a tinned copper shielding layer; The sheath (6) is a 150°C cross-linked EPDM rubber sheath.

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