Variable frequency cable for connecting double-layer shielding motor

Abstract

The utility model discloses a frequency conversion cable for connection of a double-layer shielding motor, which relates to the field of cables and comprises a soft copper conductor, an insulating layer fixedly mounted on the soft copper conductor, an inner shielding layer fixedly mounted on the insulating layer, a sheath fixedly mounted on the inner shielding layer and an outer shielding layer fixedly mounted on the sheath. A waterproof layer is fixedly installed on the outer shielding layer, a flame-retardant layer is fixedly installed on the waterproof layer, and a wear-resistant layer is fixedly installed on the flame-retardant layer. The cable adopts the fifth soft structure copper conductor, and has excellent flexibility compared with a traditional power cable; the cable adopts a double-layer shielding structure composed of the aluminum-plastic composite belt and the braided shielding layer, electromagnetic and electronic interference can be well prevented under the condition that the flexibility of the cable is ensured, the cable is reinforced by using the outer shielding layer, the waterproof layer, the flame-retardant layer and the wear-resistant layer, the flexibility and the fireproof and waterproof effects of the cable are improved, and meanwhile, the cable is resistant to external corrosion.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a frequency conversion cable for connecting double-layer shielded motors. Background Art

[0002] Frequency conversion cable is a kind of power cable used for frequency conversion drive equipment. With the improvement of industrial automation level, the application scope of frequency conversion electrical equipment is becoming more and more extensive, which makes the frequency conversion cable industry face huge market demand.

[0003] At present, the global frequency conversion cable market is expanding. According to data from market research institutions, the global frequency conversion cable market reached approximately US$10 billion in 2019 and is expected to grow at a compound annual growth rate of 10% in the next few years. This is mainly due to the promotion of industrial automation and the requirements of energy conservation and emission reduction. The rapid development of industrial automation has made double-shielded motor connection frequency conversion cables play an important role in drive systems.

[0004] In the prior art, the existing frequency conversion cables have insufficient performance, so a double-layer shielded frequency conversion cable for connecting motors is needed to meet people's needs. Utility Model Content

[0005] The utility model aims to provide a double-layer shielded variable frequency cable for connecting motors, so as to solve the problem of insufficient performance of the existing variable frequency cables mentioned in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A double-layer shielded frequency conversion cable for connecting a motor comprises a soft copper conductor, an insulating layer is fixedly mounted on the soft copper conductor, an inner shielding layer is fixedly mounted on the insulating layer, a sheath is fixedly mounted on the inner shielding layer, an outer shielding layer is fixedly mounted on the sheath, a waterproof layer is fixedly mounted on the outer shielding layer, a flame retardant layer is fixedly mounted on the waterproof layer, and a wear-resistant layer is fixedly mounted on the flame retardant layer.

[0008] Preferably, the cross-sectional area of ​​the soft copper conductor is 1.5 to 300 mm 2 It uses soft copper conductors with a circular geometric shape. It is made of several soft round copper wires of the same diameter that are regularly twisted concentrically, and the twisting directions of adjacent twisted layers are opposite.

[0009] Preferably, the insulating layer is extruded with cross-linked polyethylene insulating material, and the thickness of the insulating layer is 0.2 to 0.4 mm.

[0010] Preferably, the inner shielding layer adopts a double-layer shielding structure consisting of an aluminum-plastic composite tape and a tinned copper wire braided shielding, and the thickness of the inner shielding layer is 1 mm.

[0011] Preferably, the sheath is a polyvinyl chloride sheath, and the thickness of the sheath is 0.2 to 0.5 mm.

[0012] Preferably, the outer shielding layer is made of nickel-copper alloy tape, the thickness of the outer shielding layer is 0.1 mm, and the waterproof layer is made of asphalt, the thickness of the waterproof layer is 0.2 to 0.5 mm.

[0013] Preferably, the flame retardant layer is made of phenolic FRP, the thickness of the flame retardant layer is 0.1 to 0.2 mm, and the wear-resistant layer is made of fluororubber, the thickness of the wear-resistant layer is 0.5 to 0.8 mm.

[0014] The beneficial effects of the utility model are:

[0015] The cable adopts the fifth soft structure copper conductor, which has excellent flexibility compared with traditional power cables; the cable adopts a double-layer shielding structure composed of aluminum-plastic composite tape and braided shielding, which can well prevent electromagnetic and electronic interference while ensuring the flexibility of the cable. It is suitable for connections including inverters, motor operation, high electromagnetic interference, and is also used in automobiles, paper and food industries, environmental protection technology, packaging industry, machine tools and processing equipment.

[0016] The cables are reinforced with an outer shielding layer, a waterproof layer, a flame retardant layer, and a wear-resistant layer to increase the cable's softness, fireproofing, and waterproofing effects, while also making it resistant to external corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model provides a structural schematic diagram of a double-layer shielded frequency conversion cable for connecting a motor.

[0018] In the figure: 100, soft copper conductor; 200, insulation layer; 300, inner shielding layer; 400, sheath; 500, outer shielding layer; 600, waterproof layer; 700, flame retardant layer; 800, wear-resistant layer. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1A double-layer shielded frequency conversion cable for connecting a motor comprises a soft copper conductor 100, an insulating layer 200 is fixedly installed on the soft copper conductor 100, an inner shielding layer 300 is fixedly installed on the insulating layer 200, a sheath 400 is fixedly installed on the inner shielding layer 300, an outer shielding layer 500 is fixedly installed on the sheath 400, a waterproof layer 600 is fixedly installed on the outer shielding layer 500, a flame retardant layer 700 is fixedly installed on the waterproof layer 600, and a wear-resistant layer 800 is fixedly installed on the flame retardant layer 700. The cable adopts the fifth type of soft structure copper conductor, which has excellent flexibility compared with traditional power cables; the cable adopts a double-layer shielding structure composed of an aluminum-plastic composite tape and a braided shield, which can well prevent electromagnetic and electronic interference while ensuring the flexibility of the cable.

[0021] In an optional embodiment: the cross-sectional area of ​​the soft copper conductor 100 is 1.5 to 300 mm 2 , using soft copper conductor, the geometric shape is circular, it is composed of several soft round copper wires of the same diameter, which are regularly twisted concentrically, and the twisting directions of adjacent twisted layers are opposite, which increases the compactness of the conductor. Tinned soft copper conductor can also be used, which is made of multiple small diameter tinned copper wires to enhance the softness of the conductor and achieve anti-corrosion effect.

[0022] In an optional embodiment: the insulating layer 200 is extruded with cross-linked polyethylene insulation material, and the thickness of the insulating layer 200 is 0.2 to 0.4 mm. The insulation is extruded with cross-linked polyethylene insulation material, which has excellent electrical properties. It is a thermosetting material, insoluble and infusible, resistant to short circuits and thermal shocks, and resistant to cracking and tearing.

[0023] In an optional embodiment: the inner shielding layer 300 adopts a double-layer shielding structure composed of an aluminum-plastic composite tape and a tinned copper wire braided shielding. The thickness of the inner shielding layer 300 is 1 mm. The shielding is a double-layer shielding structure composed of an aluminum-plastic composite tape and a tinned copper wire braided shielding. While ensuring the flexibility of the cable, it can well prevent electromagnetic and electronic interference. The aluminum-plastic composite tape has good insulation, heat resistance, and interference shielding effect. The braided shield is woven with tinned copper wire, and a layer of tin is plated on the surface of the copper wire. This layer of tin provides better corrosion resistance and oxidation resistance, so that the tinned copper wire performs well in harsh environments.

[0024] In an optional embodiment: the sheath 400 is a polyvinyl chloride sheath, and the thickness of the sheath 400 is 0.2 to 0.5 mm. The sheath is a polyvinyl chloride sheath, which has a wide range of applications. By adding various materials, it can have functions such as heat resistance and oil resistance.

[0025] In an optional embodiment: the outer shielding layer 500 is wrapped with a nickel-copper alloy tape, the thickness of the outer shielding layer 500 is 0.1 mm, the waterproof layer 600 is made of asphalt, the thickness of the waterproof layer 600 is 0.2 to 0.5 mm, the outer shielding layer is made of nickel-copper alloy and has a shielding effect, and the waterproof layer is made of asphalt and has good water resistance and corrosion resistance.

[0026] In an optional embodiment: the flame retardant layer 700 is made of phenolic FRP, the thickness of the flame retardant layer 700 is 0.1 to 0.2 mm, the wear-resistant layer 800 is made of fluororubber, the thickness of the wear-resistant layer 800 is 0.5 to 0.8 mm. It should be noted that the flame retardant layer is made of phenolic FRP, which has good flame retardant properties, high oxygen index, low smoke emission, high temperature resistance, and good thermal stability; the wear-resistant layer is made of fluororubber, which has excellent oil resistance, chemical corrosion resistance, and high temperature resistance, and is suitable for environments corroded by oils and chemicals.

[0027] Working principle of this utility model:

[0028] Conductor cross-sectional area is 1.5~300mm 2 , using soft copper conductor, the geometric shape is circular, it is made of several soft round copper wires of the same diameter, twisted concentrically in a regular manner, and the twisting directions of adjacent twisted layers are opposite, which increases the compactness of the conductor. Tinned soft copper conductor can also be used, which is made of multiple small diameter tinned copper wire bundles, which enhances the softness of the conductor and achieves corrosion resistance. The insulation is made of cross-linked polyethylene insulation material extrusion, which has excellent electrical properties. It is a thermosetting material, insoluble and infusible, resistant to short circuits and thermal shocks, cracking and tearing. The shielding is a double-layer shielding structure composed of aluminum-plastic composite tape and tinned copper wire braided shielding, which can well prevent electromagnetic and electronic interference while ensuring the softness of the cable. The aluminum-plastic composite tape has good insulation, heat resistance, and interference shielding effect. The braided shield is woven with tinned copper wire, and a layer of tin is plated on the surface of the copper wire. This layer of tin provides better corrosion resistance and oxidation resistance, making the tinned copper wire perform well in harsh environments. The sheath is made of polyvinyl chloride sheath, which has a wide range of applications. By adding various materials, it can have functions such as heat resistance and oil resistance. The outer shielding layer is made of nickel-copper alloy, which has a shielding effect. The waterproof layer is made of asphalt, which has good water resistance and corrosion resistance. The flame retardant layer is made of phenolic FRP, which has good flame retardant properties, high oxygen index, low smoke emission, high temperature resistance, and good thermal stability. The wear-resistant layer is made of fluororubber, which has excellent oil resistance, chemical corrosion resistance, and high temperature resistance, and is suitable for environments corroded by oil and chemicals.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double-layer shielded frequency conversion cable for connecting a motor, comprising a soft copper conductor (100), characterized in that: The soft copper conductor (100) is fixedly mounted with an insulating layer (200), the insulating layer (200) is fixedly mounted with an inner shielding layer (300), the inner shielding layer (300) is fixedly mounted with a sheath (400), the sheath (400) is fixedly mounted with an outer shielding layer (500), the outer shielding layer (500) is fixedly mounted with a waterproof layer (600), the waterproof layer (600) is fixedly mounted with a flame retardant layer (700), and the flame retardant layer (700) is fixedly mounted with a wear-resistant layer (800); the soft copper conductor (100) is a soft copper conductor, and the geometric shape The shape is circular, and is made of a number of soft round copper wires with the same diameter that are regularly twisted concentrically, and the twisting directions of adjacent twisted layers are opposite. The insulating layer (200) is extruded with cross-linked polyethylene insulation material, the inner shielding layer (300) is a double-layer shielding structure composed of an aluminum-plastic composite tape and a tinned copper wire braided shield, the sheath (400) is a polyvinyl chloride sheath, the outer shielding layer (500) is a nickel-copper alloy tape, the waterproof layer (600) is asphalt, the flame retardant layer (700) is phenolic FRP, and the wear-resistant layer (800) is fluororubber.

2. A double-layer shielded frequency conversion cable for connecting a motor according to claim 1, characterized in that: The cross-sectional area of ​​the soft copper conductor (100) is 1.5 to 300 mm 2 .

3. The double-layer shielded variable frequency cable for connecting a motor according to claim 1, characterized in that: The thickness of the insulating layer (200) is 0.2 to 0.4 mm.

4. The double-layer shielded variable frequency cable for motor connection according to claim 1, characterized in that: The thickness of the inner shielding layer (300) is 1 mm.

5. The double-layer shielded variable frequency cable for motor connection according to claim 1, characterized in that: The thickness of the sheath (400) is between 0.2 and 0.5 mm.

6. The double-layer shielded variable frequency cable for motor connection according to claim 1, characterized in that: The thickness of the outer shielding layer (500) is 0.1 mm, and the thickness of the waterproof layer (600) is 0.2 to 0.5 mm.

7. The double-layer shielded variable frequency cable for connecting a motor according to claim 1, characterized in that: The thickness of the flame retardant layer (700) is 0.1 to 0.2 mm, and the thickness of the wear-resistant layer (800) is 0.5 to 0.8 mm.

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