Compression-resistant bending-resistant multi-core copper cable

Abstract

The utility model discloses a compression-resistant and bending-resistant multi-core copper cable, relates to the field of cables, and aims to solve the problems that an existing cable in the prior art is not provided with a compression-resistant structure, so that the cable is easy to extrude and deform when bearing large pressure, internal wire cores are damaged, transmission of electric power and signals is affected, and even safety accidents are possibly caused. A plurality of U-shaped slots are formed in the outer side end face of the voltage-withstanding column in an annular array mode, cable cores are arranged in the U-shaped slots, wear-resistant composite insulating layers are arranged outside the cable cores, an isolation sheath is arranged outside the voltage-withstanding column, a metal shielding layer is arranged outside the isolation sheath, and the metal shielding layer is arranged outside the metal shielding layer. A waterproof layer is arranged outside the metal shielding layer, a composite fireproof layer is arranged outside the waterproof layer, an outer sheath is arranged outside the composite fireproof layer, and the overall compression resistance of the cable is remarkably improved through the structural design of the compression columns and the U-shaped slots arranged in the annular array in cooperation with the reinforcing effect of internal tensile steel wires.

Description

Technical Field

[0001] This utility model relates to the field of cables, specifically a pressure-resistant and bend-resistant multi-core copper cable. Background Technology

[0002] A cable is an insulated conductor assembly used to transmit electrical energy, signals, or data. It typically consists of a conductor (copper or aluminum), insulation, shielding, filler material, and a sheath. Its core function is to efficiently and safely conduct current or signals. Cables come in various types, classified by application as power cables (transmitting high-voltage or low-voltage electrical energy), communication cables (transmitting telephone and network signals), and control cables (transmitting commands between devices); and by structure as single-core, multi-core, armored (with added mechanical protection), or unarmored cables. Cables are widely used in power systems, construction, transportation, communications, and other fields, and are a key component of modern infrastructure.

[0003] For example, patent application CN 211654393 U discloses a multi-core copper conductor cable, including a cable core, an inner insulation layer wrapped around the outer side of the cable core, a composite insulation layer wrapped around the outer side of the inner insulation layer, and an inner sheath wrapped around the outer side of the composite insulation layer. A gap exists between the composite insulation layer and the inner sheath, which is a filling layer. The cavity of the filling layer is filled with a flame-retardant medium. A fireproof layer is provided on the outer side of the inner sheath, and a copper sheath is provided on the outer side of the fireproof layer. This technical solution proposes a multi-core copper conductor cable that achieves a more stable insulation effect through the dual cooperation of the inner insulation layer and the composite insulation layer. This not only enhances aging resistance and reduces insulation layer damage caused by friction, but also improves operational reliability and service life.

[0004] However, the aforementioned technologies do not have a pressure-resistant structure on the cable. When the cable is subjected to high pressure, it is easily squeezed and deformed, resulting in damage to the internal core, affecting the transmission of power and signals, and may even cause safety accidents. Therefore, the market urgently needs to develop a pressure-resistant and bend-resistant multi-core copper cable to help people solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a pressure-resistant and bend-resistant multi-core copper cable to solve the problem mentioned in the background art that the existing cables do not have a pressure-resistant structure, and when the cable is subjected to greater pressure, the cable is easily squeezed and deformed, resulting in damage to the internal cores, affecting the transmission of power and signals, and may even cause safety accidents.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressure-resistant and bend-resistant multi-core copper cable, comprising a pressure-resistant column, a plurality of U-shaped slots arranged in a ring array on the outer end face of the pressure-resistant column, a cable core disposed inside each of the plurality of U-shaped slots, a wear-resistant composite insulation layer disposed outside the cable core, an isolation sheath disposed outside the pressure-resistant column, a metal shielding layer disposed outside the isolation sheath, a waterproof layer disposed outside the metal shielding layer, a composite fireproof layer disposed outside the waterproof layer, and an outer sheath disposed outside the composite fireproof layer.

[0007] Preferably, a tensile steel wire is fixedly installed in the middle of the pressure-resistant column, and the pressure-resistant column and its multiple U-shaped slots are integrally formed by extrusion.

[0008] Preferably, the wear-resistant composite insulation layer includes an insulation layer and a wear-resistant layer. The insulation layer is fixed to the outside of the cable core by extrusion and is made of cross-linked polyethylene material. The wear-resistant layer is fixed to the outside of the insulation layer by extrusion and is made of thermoplastic polyurethane material.

[0009] Preferably, the isolation sleeve is fixed to the outside of the pressure-resistant column by extrusion, and the isolation sleeve is made of polyurethane elastomer material.

[0010] Preferably, the metal shielding layer is fixed to the outside of the isolation sleeve by weaving, and the metal shielding layer is made of copper wire. The waterproof layer is fixed to the outside of the metal shielding layer by extrusion, and the waterproof layer is made of polyethylene material.

[0011] Preferably, the composite fireproof layer includes an impact-resistant layer and a fireproof layer. The impact-resistant layer is made of foamed polyethylene material and is fixed to the outside of the waterproof layer by extrusion. The fireproof layer is made of ceramicized silicone rubber material and is fixed to the outside of the impact-resistant layer by extrusion.

[0012] Preferably, the outer sheath is made of polyurethane material and is fixed to the outside of the fireproof layer by extrusion.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, the U-shaped slot structure design with pressure-resistant columns and their annular array, combined with the reinforcing effect of the internal tensile steel wire, significantly improves the overall pressure resistance of the cable. This structure can effectively disperse stress when subjected to external pressure, prevent cable deformation, ensure the integrity of the internal cable core, thereby ensuring the stability of power and signal transmission and reducing the risk of safety accidents caused by compression.

[0015] (2) In this utility model, a multi-layer composite protection design is adopted, including a wear-resistant composite insulation layer, a metal shielding layer, a waterproof layer and a composite fireproof layer, which realizes multi-functional protection for the cable. In particular, the impact-resistant layer and the fireproof layer of the composite fireproof layer provide dual protection, and the application of ceramicized silicone rubber material gives the cable excellent impact resistance and fire resistance, which greatly improves the safety and reliability of the cable in high-temperature environments.

[0016] (3) In this utility model, the cable core is fixed by filling the polyurethane elastomer material of the isolation sheath and combined with the polyurethane wear-resistant layer of the outer sheath, which not only enhances the bending resistance of the cable, but also improves the compactness of the overall structure and environmental adaptability. This design enables the cable to maintain good performance under frequent bending or complex working conditions and extends the service life of the cable. Attached Figure Description

[0017] Figure 1 This is a front view of a pressure-resistant and bend-resistant multi-core copper cable according to this utility model;

[0018] Figure 2 This is a main sectional view of the cable of this utility model;

[0019] Figure 3 This is a schematic diagram of the wear-resistant composite insulating layer structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the composite fireproof layer structure of this utility model.

[0021] In the diagram: 1. Pressure-resistant column; 101. Tensile steel wire; 102. U-shaped slot; 2. Cable core; 201. Wear-resistant composite insulation layer; 202. Insulation layer; 203. Wear-resistant layer; 3. Isolation sheath; 4. Metal shielding layer; 5. Waterproof layer; 6. Composite fireproof layer; 601. Impact-resistant layer; 602. Fireproof layer; 7. Outer sheath. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4This utility model provides an embodiment of a pressure-resistant and bend-resistant multi-core copper cable, comprising a pressure-resistant column 1, with multiple U-shaped slots 102 arranged in a ring array on the outer end face of the pressure-resistant column 1, and a tensile steel wire 101 fixedly arranged in the middle of the inside of the pressure-resistant column 1. The tensile steel wire 101 enhances the overall mechanical strength of the cable and prevents tensile deformation. The pressure-resistant column 1 and the multiple U-shaped slots 102 are integrally formed by extrusion. Each of the multiple U-shaped slots 102 contains a cable core 2. The multiple U-shaped slots 102 space the multiple cable cores 2 so that adjacent cables will not be squeezed when the cable is bent and compressed. The cable core 2 is provided with a wear-resistant composite insulation layer 201, which includes an insulation layer 202 and a wear-resistant layer 203. The insulation layer 202 is fixed to the outside of the cable core 2 by extrusion. The insulation layer 202 is made of cross-linked polyethylene material, which has high insulation, high temperature resistance and chemical corrosion resistance to ensure safe power transmission. The wear-resistant layer 203 is fixed to the outside of the insulation layer 202 by extrusion. The wear-resistant layer 203 is made of thermoplastic polyurethane material, which has high wear resistance and bending resistance to extend the service life of the cable. An isolation sleeve 3 is provided on the outside of the pressure-resistant column 1. The isolation sleeve 3 is fixed to the outside of the pressure-resistant column 1 by extrusion. The isolation sleeve 3 is made of polyurethane elastomer material. The gap between the U-shaped slot 102 and the wear-resistant layer 203 on the cable core 2 is filled during the extrusion of the isolation sleeve 3 to achieve the fixation of the cable core 2.

[0024] Please see Figure 2 and Figure 4The isolation sheath 3 is externally provided with a metal shielding layer 4, which is fixed to the outside of the isolation sheath 3 by braiding. The metal shielding layer 4 is made of copper wire braid, which can effectively shield external electromagnetic interference and ensure the signal transmission stability of the cable. A waterproof layer 5 is externally provided with the metal shielding layer 4, which is fixed to the outside of the metal shielding layer 4 by extrusion. The waterproof layer 5 is made of polyethylene material, which has excellent water resistance, high insulation, and good chemical stability, improving the cable's waterproof performance. A composite fireproof layer 6 is externally provided with the waterproof layer 5, which includes an impact-resistant layer 601 and a fireproof layer 602. The impact-resistant layer 601 is made of foamed polyethylene. Made of olefin material, the impact-resistant layer 601 absorbs external impact force, further improving its compressive strength and bending resistance. The impact-resistant layer 601 is fixed to the outside of the waterproof layer 5 by extrusion. The fireproof layer 602 is made of ceramicized silicone rubber material, which can be ceramicized at high temperature to form a fire barrier with excellent flame retardant properties. The fireproof layer 602 is fixed to the outside of the impact-resistant layer 601 by extrusion. An outer sheath 7 is provided on the outside of the composite fireproof layer 6. The outer sheath 7 is fixed to the outside of the fireproof layer 602 by extrusion. The outer sheath 7 is made of polyurethane material, which has wear-resistant and environmental corrosion-resistant properties, improving the cable's wear resistance and protecting the integrity of the internal structure.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pressure-resistant and bend-resistant multi-core copper cable, comprising a pressure-resistant column (1), characterized in that: The pressure-resistant column (1) has a ring array of multiple U-shaped slots (102) arranged on its outer end face. Each of the multiple U-shaped slots (102) has a cable core (2) inside. The cable core (2) has a wear-resistant composite insulation layer (201) outside. The pressure-resistant column (1) has an isolation sleeve (3) outside. The isolation sleeve (3) has a metal shielding layer (4) outside. The metal shielding layer (4) has a waterproof layer (5) outside. The waterproof layer (5) has a composite fireproof layer (6) outside. The composite fireproof layer (6) has an outer sheath (7) outside.

2. The multi-core copper cable with pressure resistance and bending resistance according to claim 1, characterized in that: The pressure-resistant column (1) is fixedly provided with a tensile steel wire (101) in the middle of its interior, and the pressure-resistant column (1) and its multiple U-shaped slots (102) are integrally formed by extrusion.

3. The multi-core copper cable with pressure resistance and bending resistance according to claim 1, characterized in that: The wear-resistant composite insulation layer (201) includes an insulation layer (202) and a wear-resistant layer (203). The insulation layer (202) is fixed to the outside of the cable core (2) by extrusion. The insulation layer (202) is made of cross-linked polyethylene material. The wear-resistant layer (203) is fixed to the outside of the insulation layer (202) by extrusion. The wear-resistant layer (203) is made of thermoplastic polyurethane material.

4. The multi-core copper cable with pressure resistance and bending resistance according to claim 1, characterized in that: The isolation sleeve (3) is fixed to the outside of the pressure-resistant column (1) by extrusion. The isolation sleeve (3) is made of polyurethane elastomer material.

5. The multi-core copper cable with pressure resistance and bending resistance according to claim 1, characterized in that: The metal shielding layer (4) is fixed to the outside of the isolation sleeve (3) by weaving. The metal shielding layer (4) is made of copper wire. The waterproof layer (5) is fixed to the outside of the metal shielding layer (4) by extrusion. The waterproof layer (5) is made of polyethylene material.

6. The multi-core copper cable with pressure resistance and bending resistance according to claim 1, characterized in that: The composite fireproof layer (6) includes an impact-resistant layer (601) and a fireproof layer (602). The impact-resistant layer (601) is made of foamed polyethylene material and is fixed to the outside of the waterproof layer (5) by extrusion. The fireproof layer (602) is made of ceramicized silicone rubber material and is fixed to the outside of the impact-resistant layer (601) by extrusion.

7. The multi-core copper cable with pressure resistance and bending resistance according to claim 1, characterized in that: The outer sheath (7) is made of polyurethane material and is fixed to the outside of the fireproof layer (602) by extrusion.

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