Low-cost armored variable frequency cable

Abstract

The utility model discloses a low-cost armored variable frequency cable, which belongs to the technical field of power cables, and comprises conductors, a filling layer, an armored layer and a sheath layer, an insulating layer is arranged on the outer side of each conductor, a plurality of conductors are connected in a twisting manner, the filling layer is arranged at the gap between the conductors, and the armored layer is arranged on the outer side of the filling layer; the armor layer comprises a wrapping tape I, armor wires and a wrapping tape II, the wrapping tape I wraps the filling layer, the armor wires wrap the outer side of the wrapping tape I, and the wrapping tape II is arranged on the outer side of the armor wires. According to the utility model, the armor layer comprises the first wrapping tape, the armor wires and the second wrapping tape, the first wrapping tape and the second wrapping tape are made of non-woven fabric materials and have good mechanical protection performance and wrapping formability, and the armor wires are preferably aluminum wires and have good shielding effect and mechanical protection capability, so that electromagnetic interference generated in the transmission process of variable frequency signals can be effectively prevented; the cable is improved in compression resistance and tension resistance, and is reduced in manufacturing cost.

Description

Technical Field

[0001] This utility model relates to a low-cost armored frequency converter cable, belonging to the field of power cable technology. Background Technology

[0002] In industrial automation and CNC technology, frequency converters are increasingly widely used in various drive systems. Variable frequency drive control systems can effectively regulate motor speed, improve equipment operating efficiency, and achieve energy conservation and emission reduction. However, due to the high-frequency switching and high-current operating environment, ordinary cables often cannot withstand long-term electromagnetic and mechanical stress. Therefore, to meet the requirements of equipment use, variable frequency cables are used to ensure stable and safe power output under different conditions.

[0003] Currently, most mainstream frequency converter cables on the market are made of precious metals and feature multi-layer shielding designs that are resistant to high temperatures, oil, corrosion, and electromagnetic interference. Combined with an outer armor layer, they effectively prevent mechanical damage and environmental corrosion. These frequency converter cables can meet the performance and reliability requirements of various industrial applications. However, while current cables have achieved significant advantages in improving the performance of frequency converter cables, their high manufacturing costs and complex production processes limit their application in projects where cost is insufficient. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a low-cost armored frequency converter cable, which solves the problem of high cost of armored frequency converters.

[0005] The technical problem to be solved by this utility model is achieved by the following technical solution: a low-cost armored frequency converter cable, comprising...

[0006] Conductor, insulation layer, filler layer, armor layer, sheath layer,

[0007] The cable, from the inside out, consists of the conductor, the insulation layer, the filler layer, the armor layer, and the sheath layer.

[0008] An insulating layer is provided on the outside of the conductor, multiple conductors are connected by twisting, a filling layer is provided in the gap between the conductors, and an armor layer is provided on the outside of the filling layer;

[0009] The armor layer includes a first wrapping tape, armor threads, and a second wrapping tape. The first wrapping tape wraps around the filling layer, and armor threads are wrapped around the outside of the first wrapping tape. The second wrapping tape is located on the outside of the armor threads. The first wrapping tape is made of non-woven fabric, the armor threads can shield and armor, and the second wrapping tape is made of non-woven fabric.

[0010] Preferably, the four conductors are connected by twisting.

[0011] Preferably, an inner sheath is provided at the connection between the outer side of the first strap and the armor wire.

[0012] Preferably, the inner sheath is made of a polymer material and is installed on the outside of the bag strap by extrusion.

[0013] Preferably, the armor wire is made of aluminum wire.

[0014] Preferably, the sheath layer is made of a high-molecular flame-retardant material.

[0015] The beneficial effects of this utility model are:

[0016] (1) Through this utility model, the armor layer includes a first wrapping tape, an armor wire, and a second wrapping tape. Both the first wrapping tape and the second wrapping tape are made of non-woven fabric, which has good mechanical protection performance and covering molding properties. The armor wire is preferably aluminum wire, which has good shielding effect and mechanical protection capability. It can effectively prevent electromagnetic interference generated during the transmission of frequency conversion signals, improve the cable's compressive and tensile strength, and reduce manufacturing costs, thus having good economic benefits.

[0017] (2) By connecting multiple conductors in a twisted manner and setting a flame-retardant filling layer in the gap between the conductors, the structural stability between the conductors can be improved, the overall flexibility and roundness of the cable can be enhanced, structural deformation caused by external pressure or long-term use can be avoided, and the convenience of wiring can be improved; at the same time, the filling material is selected as flame-retardant material, which further improves the flame-retardant performance and safety of the cable.

[0018] (3) By using this utility model, by setting an inner sheath layer between the wrapping tape and the armor wire, the inner sheath is made of polymer material and is wrapped on the outside of the wrapping tape by extrusion, which effectively isolates the armor layer from the inner insulation layer, improves the integrity and protection performance of the internal structure of the cable, prevents the armor wire from short circuits and corrosion caused by stress or humid environment, and extends the service life of the cable. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] In the diagram: 1-Conductor, 2-Insulation layer, 3-Filling layer, 4-Wrapping tape one, 5-Inner sheath, 6-Armor wire, 7-Wrapping tape two, 8-Sheath layer. Detailed Implementation

[0021] In order to make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Example 1

[0023] like Figure 1 As shown, a low-cost armored frequency converter cable includes a conductor 1, an insulation layer 2, a filler layer 3, an armor layer, and a sheath layer 8. The cable consists of conductor 1, insulation layer 2, filler layer 3, armor layer, and sheath layer from the inside out.

[0024] In this embodiment, an insulating layer is provided on the outside of the conductor 1, multiple conductors 1 are connected by twisting, a filling layer 3 is provided in the gap between the multiple conductors 1 to fill the gap between the multiple conductors 1, and an armor layer is provided on the outside of the filling layer 3.

[0025] In this embodiment, four conductors 1 are connected by twisting. The interior of each conductor 1 consists of multiple strands of fine copper wire connected by twisting, serving as the wire core. Conductors 1 can carry current and have good conductivity and flexibility.

[0026] An insulating layer 2 is provided on the outside of conductor 1. The insulating layer 2 is made of cross-linked polyethylene and attached to the outside of conductor 1. The insulating layer 2 is concentric with conductor 1, and the outer surface of the insulating layer 2 is smooth and round. The insulating layer 2 provides electrical isolation, meets the voltage requirements during the use of frequency conversion cables, and can withstand corona discharge and aging.

[0027] After multiple conductors 1 are stranded into a cable, a filler layer 3 is provided between the conductors 1. The filler layer 3 can uniformly fill the gaps between the conductors 1 to form a near-circular filler. In this embodiment, the filler layer 3 is made of powder containing flame retardant injected or wrapped. The filler layer 3 can maintain the roundness of the cable cross-section and improve the overall flame retardant performance of the cable. The filler layer can also suppress the wear of the stranded conductors 1 caused by vibration during operation.

[0028] The armor layer includes a first strap 4, armor wires 6, and a second strap 7. The inner side of the first strap 4 is connected to the filling layer 3, and the first strap 4 wraps around the filling layer 3. The armor wires 6 are wrapped around the outer side of the first strap 4, and the second strap 7 is provided on the outer side of the armor wires 6.

[0029] In this embodiment, the wrapping tape 4 is made of non-woven fabric, which is strip-shaped and tightly wrapped around the outside of the filling layer 3 in a spiral manner. The wrapping tape 4 can fix the filling layer 3 and prevent the filler from falling off. It can also provide a flat base.

[0030] An inner sheath 5 is provided at the gap between the wrapping tape 4 and the armor wire 6. The inner sheath 5 is formed by extruding layers of polymer material onto the outside of the wrapping tape 4, is concentric with the wrapping tape 4, and has a smooth and continuous surface. The inner sheath 5 protects the wrapping tape 4 and the filler layer 3, preventing mechanical scratches to the wrapping tape 4 during the subsequent winding of the armor wire 6. In this embodiment, the inner sheath 5 is made of polyvinyl chloride, which improves adhesion, enhances the integration of the wrapping tape 4 and the armor wire 6, and improves the overall stability of the cable.

[0031] The armor wire 6 is installed on the outside of the inner sheath 5. The armor wire 6 is made of aluminum wire and is installed on the outside of the inner sheath 5 in a spiral wrapping manner. The wrapping direction is opposite to or the same as the spiral direction of the wrapping tape 4. The armor wire 6 can provide armor protection against pressure and impact; it can also provide a certain degree of shielding for the high-frequency components in the frequency conversion cable.

[0032] A second wrapping tape 7 is provided on the outside of the armor wire 6. Both the second wrapping tape 7 and the first wrapping tape 4 are made of non-woven fabric and are set on the outside of the armor wire layer by spiral winding. The second wrapping tape 7 can fix the armor wire 6 and prevent the armor wire 6 from shifting or loosening; it can also flatten the surface and provide a smooth plane for the sheath layer 8.

[0033] A sheath layer 8 is disposed on the outside of the wrapping tape layer 7. The sheath layer 8 is disposed on the outside of the wrapping tape 7 by extrusion. In this embodiment, the sheath layer 8 is a high-molecular flame-retardant material, forming a concentric continuous cylinder with the wrapping tape 7.

[0034] In this embodiment, four conductors 1 are fixed together to form a cable core, which ensures the overall flexibility and electrical balance of the cable. An insulation layer 2 is provided on the outside of the conductors 1, and the insulation layer 2 is formed by extruding polypropylene onto the surface of the conductors 1.

[0035] The sheathing tape 4 is made of non-woven fabric, which is less expensive than metal and high-performance plastic tapes compared to traditional armored frequency converter cables. The armor wire 6 is made of aluminum wire, while the armor wire 6 is made of steel wire, which reduces costs and cable weight compared to traditional armored frequency converter cables that use steel wire as the armor layer.

[0036] The assembled cable meets the requirements of frequency conversion operation; meets the requirements of laying impact, shock and flex; through the coordinated work of filler layer 3, wrapping tape 1 4, wrapping tape 2 7 and outer sheath 8, it can meet the insulation performance of the cable; armor wire 6 can achieve electromagnetic shielding and reduce interference from surrounding equipment.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A low-cost armored frequency converter cable, comprising: Conductor, filler layer, armor layer, sheath layer, The cable consists of, from the inside out, the conductor, the filler layer, the armor layer, and the sheath layer. Its features are: An insulating layer is provided on the outside of the conductor, multiple conductors are connected by twisting, a filling layer is provided in the gap between the conductors, and an armor layer is provided on the outside of the filling layer; The armor layer includes a first wrapping tape, armor threads, and a second wrapping tape. The first wrapping tape wraps around the filling layer, and armor threads are wrapped around the outside of the first wrapping tape. The second wrapping tape is located on the outside of the armor threads. The first wrapping tape is made of non-woven fabric, the armor threads can shield and armor, and the second wrapping tape is made of non-woven fabric.

2. The low-cost armored frequency converter cable according to claim 1, characterized in that: The four conductors are connected by twisting.

3. The low-cost armored frequency converter cable according to claim 1, characterized in that: An inner sheath is provided at the connection point between the outer side of the first strap and the armor wire.

4. The low-cost armored frequency converter cable according to claim 3, characterized in that: The inner sheath is made of polymer material and is installed on the outside of the bag strap by extrusion.

5. A low-cost armored frequency converter cable according to claim 1, characterized in that: The armor wire is made of aluminum wire.

6. The low-cost armored frequency converter cable according to claim 1, characterized in that: The sheath layer is made of high-molecular flame-retardant material.

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