Motor lead cable

Abstract

The utility model discloses a motor lead cable. The motor lead cable sequentially comprises a conductor, a cable core and a cable core from inside to outside, the polyimide insulation protection layer is arranged on the outer side of the conductor in an overlapped wrapping manner; the fluoroplastic insulating layer is arranged on the outer side of the polyimide insulating protective layer in an extruding manner; and the raw adhesive tape wrapping protection layer wraps the outer side of the fluoroplastic insulating layer and is adhered to the fluoroplastic insulating layer in a hot melting adhesion manner to form an integrated structure. The cable adopts a three-layer conductor protection technology, the polyimide insulation protection layer greatly enhances the mechanical performance and the high temperature resistance of the cable, the fluoroplastic insulation layer improves the insulation performance and the sealing performance of the cable, and the raw adhesive tape wrapping protection layer can improve the flexibility and the toughness of the cable, so that the cable is easy to shape and penetrate into a hole, and the service life of the cable is prolonged. And the motor has waterproof performance, high temperature resistance, scratch resistance and the like, so that the stability of the motor in the assembly and operation processes is ensured.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a motor lead cable. Background Art

[0002] High-temperature permanent magnet synchronous submersible motors are generally used in oil wells or natural gas wells to drive electric pumps to pump crude oil or groundwater to the surface. The motors need to be laid and fixed underground together with electric pumps and other equipment. The underground environment is relatively harsh: they need to withstand high temperatures, high pressures, acid and alkali gas corrosion, etc.

[0003] Motor leads are flexible wires that connect motor windings and are permanently connected to the motor windings and lead out of the motor housing or connect the windings to the motor terminals. Many factors need to be considered, such as corrosion resistance, high temperature resistance, high pressure resistance, and waterproofness. Problems such as cable abrasions caused during insertion into holes also need to be considered.

[0004] Conventional high-temperature-resistant motor leads generally use cables with Category 5 tinned conductors and fluoroplastic insulation. This structure has a high temperature resistance rating and is suitable for use in conventional high-temperature motors. However, it is not adaptable enough to motors that require continuous perforation, and can easily cause insulation damage and breakdown when passing through the holes, affecting the motor's service life.

[0005] Underground high-temperature resistant permanent magnet synchronous motors are generally laid in wells 1000-3000 meters deep with electric pumps and other equipment. Therefore, higher sealing performance requirements are required, resulting in a more complex sealing structure. The motor leads need to be repeatedly bent when connecting the motor winding connection and the terminal. Conventional fluoroplastic insulated cables have insufficient bending shaping performance, which makes it difficult to pass through the pipe and easily damages the insulation. Utility Model Content

[0006] The purpose of this utility model is to overcome the above-mentioned defects. This utility model provides a motor lead cable that is high temperature resistant and easy to shape, and can be used as a motor lead for deep wells. To achieve the above purpose, the technical solution of this utility model includes:

[0007] A motor lead cable, characterized in that the motor lead cable comprises, from inside to outside, the following:

[0008] conductor;

[0009] A polyimide insulating protective layer is provided on the outside of the conductor by overlapping and wrapping;

[0010] A fluoroplastic insulating layer is provided on the outside of the polyimide insulating protective layer by extrusion;

[0011] The raw adhesive tape is wrapped around the protective layer, wrapped around the outer side of the fluoroplastic insulation layer, and adhered to the fluoroplastic insulation layer by hot-melt bonding to form an integrated structure.

[0012] A further improvement of the present invention is that the conductor is a metal wire bundle formed by twisting electrical copper rods after being drawn and tinned or silver-plated.

[0013] A further improvement of the present invention is that the ratio of the thickness of the raw tape wrapped protective layer to the thickness of the fluoroplastic insulation layer is 0.8 to 1.5.

[0014] A further improvement of the present invention is that the ratio of the thickness of the fluoroplastic insulating layer to the thickness of the polyimide insulating protective layer is 4-8.

[0015] A further improvement of the present invention is that the ratio of the diameter of the conductor to the total diameter of the motor lead cable is 0.5 to 0.7.

[0016] The beneficial effects of the utility model include: the cable adopts a three-layer conductor protection process, the polyimide insulation protection layer greatly enhances the mechanical properties and high temperature resistance of the cable, the fluoroplastic insulation layer increases the insulation and sealing properties of the cable, and the raw tape wrapped protection layer can improve the softness and toughness of the cable, making the cable easy to shape and perforate, and has waterproof performance, high temperature resistance, anti-scratch and other properties, ensuring the stability of the motor during assembly and operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a cross-sectional view of the motor lead cable of the utility model.

[0018] Among them, the accompanying drawings are marked as follows: 1. conductor; 2. polyimide insulation protective layer; 3. fluoroplastic insulation layer; 4. raw tape wrapped protective layer. DETAILED DESCRIPTION

[0019] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features within these embodiments may be combined with one another, unless they conflict.

[0020] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed at will, and the component layout may also be more complex.

[0021] like Figure 1As shown, an embodiment of the present invention provides a motor lead cable. The motor lead cable comprises, from the inside to the outside:

[0022] Conductor 1: Conductor 1 is a strand of wires formed by drawing electrical copper rods, tinning or silver-plating them, and then twisting them into a bundle. This conductor is Class 5 tinned or silver-plated annealed copper to prevent oxidation at high temperatures, offering high-temperature resistance and oxidation resistance.

[0023] A polyimide insulation layer 2 is applied to the outside of the conductor 1 by overlapping the layers. After wrapping, the polyimide insulation layer 2 undergoes a high-temperature treatment to bond the polyimide film to the conductor 1. This layer enhances the cable's mechanical properties, insulation performance, and temperature resistance, enabling the motor to achieve insulation grade H.

[0024] The fluoroplastic insulating layer 3 is arranged on the outside of the polyimide insulating protective layer 2 by extrusion, and can enhance the waterproof, heat-resistant and insulating properties of the cable.

[0025] The protective layer 4 is wrapped with raw tape and then wrapped around the outside of the fluoroplastic insulation layer 3. The tape is then bonded to the fluoroplastic insulation layer 3 by hot-melt bonding to form an integrated structure. This integrated structure prevents peeling or loosening of the cable, provides a smooth and soft surface, is easy to shape, and facilitates perforation, effectively protecting the inner insulation layer and ensuring cable stability.

[0026] In this embodiment, the ratio of the thickness of the raw tape wrapping protective layer to the thickness of the fluoroplastic insulation layer is 0.8 to 1.5. The ratio of the thickness of the fluoroplastic insulation layer to the thickness of the polyimide insulation layer is 4 to 8. The ratio of the diameter of the conductor to the total diameter of the motor lead cable is 0.5 to 0.7. This numerical range defines the maximum thickness of the raw tape wrapping protective layer for a given cable diameter, ensuring that the raw tape wrapping protective layer performs the aforementioned function.

[0027] In the embodiments of this utility model, the materials and molding processes used for each layer of the cable are all existing materials and existing molding technologies. This embodiment does not involve improvements to the materials and processes. This motor lead cable has excellent bending and shaping properties. The conductor adopts a three-layer structure for protection, and has advantages such as easy perforation, resistance to damage, waterproofness and pressure resistance. The cable also meets the following environmental performance requirements: cadmium and its compounds <100ppm; lead and its compounds <1000ppm; mercury and its compounds <1000ppm; hexavalent chromium compounds <1000ppm; polybrominated biphenyls (PBB) <1000ppm; polybrominated diphenyl ethers (PBDE) <1000ppm.

[0028] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A motor lead cable, characterized in that: The motor lead cable includes the following from the inside out: Conductor (1); A polyimide insulating protective layer (2) is provided on the outside of the conductor (1) by overlapping and wrapping; A fluoroplastic insulating layer (3) is provided on the outer side of the polyimide insulating protective layer (2) by extrusion; The raw tape is wrapped around the protective layer (4), wrapped around the outside of the fluoroplastic insulation layer (3), and adhered to the fluoroplastic insulation layer (3) by hot-melt bonding to form an integrated structure.

2. A motor lead cable according to claim 1, characterized in that: The conductor (1) is a metal wire bundle formed by twisting an electrical copper rod after being drawn and subjected to tinning or silver plating.

3. A motor lead cable according to claim 1, characterized in that: The ratio of the thickness of the raw tape wrapped protective layer (4) to the thickness of the fluoroplastic insulation layer (3) is 0.8 to 1.

5.

4. A motor lead cable according to claim 1, characterized in that: The ratio of the thickness of the fluoroplastic insulating layer (3) to the thickness of the polyimide insulating protective layer (2) is 4 to 8.

5. The motor lead cable according to claim 1, characterized in that: The ratio of the diameter of the conductor (1) to the total diameter of the motor lead cable is 0.5 to 0.7.

Images