A kink resistant polyethylene jacketed power cable
By setting a polyethylene sheath on the outside of the cable and an internal anti-torsion layer, and utilizing a combination structure of TPE spiral column and polyurethane sleeve, the problem of insufficient connection strength of existing cables is solved, and better anti-torsion performance and stability are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI WUHU CABLE TECHNOLOGY CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-06-12
AI Technical Summary
The existing cable's reinforcing core is located inside the outer groove of the fixing layer and is pressed and fixed by the external heat insulation layer, resulting in poor overall connection strength with the internal fixing layer.
A polyethylene sheath is used as the outermost layer, with an anti-torsion layer inside. The anti-torsion layer is connected by TPE spiral columns and elastomers, and a polyurethane sleeve is placed on the outside. The combination of multiple layers improves the connection strength and elasticity.
It improves the cable's resistance to torsion, reduces damage and failures caused by torsion, and enhances the cable's durability and stability.
Smart Images
Figure CN224355019U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cable technology, specifically to a torsion-resistant polyethylene sheathed power cable. Background Technology
[0002] Power cables are the core wires used in power systems to transmit and distribute high-power electrical energy. They are widely used in urban underground power grids, power plant lead-out lines, power supply for industrial and mining enterprises, and cross-water power transmission.
[0003] For example, publication number CN212809834U, entitled "An Anti-Twist Cable," includes an outer protective layer, a heat insulation layer, a fixing layer, a buffer layer, and cable cores. The heat insulation layer is disposed inside the outer protective layer, and the fixing layer is disposed inside the heat insulation layer. Four fixing grooves are arranged at equal angles along the length of the heat insulation layer and the fixing layer, and each of the four fixing grooves contains a reinforcing core. The buffer layer is disposed inside the fixing layer, and two cable cores are disposed inside the buffer layer. This design, incorporating reinforcing cores and a polygonal outer protective layer, effectively improves the overall anti-twist and anti-bending performance of the cable, enhancing its overall safety performance.
[0004] The existing cable has the following defects when in use: the reinforcing core of the cable is located in the outer groove of the fixing layer and is pressed and fixed by the external heat insulation layer, resulting in poor overall connection strength with the internal fixing layer; therefore, it does not meet the current requirements. In response, a torsion-resistant polyethylene sheathed power cable is proposed. Utility Model Content
[0005] The purpose of this utility model is to provide a torsion-resistant polyethylene sheathed power cable to solve the problem mentioned in the background art that the reinforcing core of the existing cable is located in the outer groove of the fixing layer and is pressed and fixed by the external heat insulation layer, resulting in poor overall connection strength with the internal fixing layer.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a torsion-resistant polyethylene sheathed power cable, comprising: a polyethylene sheath, wherein an anti-torsion layer is provided inside the polyethylene sheath, the anti-torsion layer comprising TPE spiral columns, and the TPE spiral columns are connected by a plurality of elastomers.
[0007] Preferably, the elastomer includes TPE elastic columns, which are arranged in a ring-shaped, spaced manner on the TPE spiral columns.
[0008] Preferably, the TPE spiral column is provided with a polyurethane sleeve on its exterior, and the outer wall of the polyurethane sleeve has a plurality of cavities that are fused with the TPE elastic column.
[0009] Preferably, the anti-torsion layer has an internal isolation layer, and the internal isolation layer has a wrapping tape layer.
[0010] Preferably, the wrapping tape layer has an insulating shielding layer inside, and the insulating shielding layer has an XLPE insulating layer inside.
[0011] Preferably, the XLPE insulation layer has a conductor shielding layer inside, and the conductor shielding layer has a conductor core inside.
[0012] Preferably, the insulating shielding layer is a metal woven cover composed of multiple strands of metal wire.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] (1) In this utility model, the polyethylene sheath is located on the outermost part of the cable. It has good flexibility and can effectively buffer torsional stress, thereby improving the cable's torsion resistance. This characteristic enables the cable to better resist torsion and twisting during use, reducing damage and failure caused by cable torsion. The TPE spiral column has good elasticity and recovery, and can quickly return to its original shape after being twisted by external force. Even after multiple torsion and recovery cycles, it can still maintain good elasticity. Its spiral structure can increase its elasticity and improve the anti-torsion effect. It acts between the polyethylene sheath and the inner conductor, which can effectively improve the cable's anti-torsion performance.
[0015] (2) In this utility model, TPE elastic columns are set on the outer wall of the TPE spiral column. They are also made of TPE material and have good elasticity and torsion resistance. They can connect the spirals on the TPE spiral column and improve the stability and tensile strength of the spiral. The TPE elastic columns are distributed in a ring-shaped interval. This distribution structure can further improve the stability of the area. The outer part is covered with a polyurethane sleeve. Soft polyurethane has a thermoplastic linear structure, excellent resilience, and small compression deformation, which effectively improves the elasticity and torsion resistance of the area. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the anti-torsion layer structure of this utility model;
[0018] Figure 3 This is a schematic diagram of the TPE spiral column structure of this utility model;
[0019] Figure 4 This is a schematic diagram of the internal structure of the isolation layer of this utility model;
[0020] In the diagram: 1. Polyethylene sheath; 2. Anti-torsion layer; 201. Polyurethane sheath; 202. Cavity; 203. TPE spiral column; 204. TPE elastic column; 3. Separation layer; 4. Wrapping tape layer; 5. Insulating shielding layer; 501. Metal braided cover; 6. XLPE insulation layer; 7. Conductor core; 8. Conductor shielding layer. Detailed Implementation
[0021] 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.
[0022] Please see Figure 1 , Figure 2 , Figure 3 This utility model provides an embodiment of an anti-torsion polyethylene sheathed power cable, comprising: a polyethylene sheath 1, an anti-torsion layer 2 disposed inside the polyethylene sheath 1, the anti-torsion layer 2 comprising TPE spiral columns 203, the TPE spiral columns 203 being connected by a plurality of elastomers; the polyethylene sheath 1 is located on the outermost side of the cable, and has good flexibility, which can effectively buffer torsional stress, thereby improving the cable's torsion resistance. This characteristic enables the cable to better resist torsion and twisting during use, reducing damage and failure caused by cable torsion. The TPE spiral columns 203 have good elasticity and recovery, and can quickly return to their original shape after being twisted by external force. Even after multiple torsion and recovery cycles, they can still maintain good elasticity. The spiral structure increases its elasticity and provides better anti-torsion effect. Acting between the polyethylene sheath 1 and the inner conductor, it can effectively improve the cable's anti-torsion performance.
[0023] Please see Figure 2 , Figure 3 The elastomer includes TPE elastic columns 204, which are arranged in a ring at intervals on TPE spiral columns 203. A polyurethane sleeve 201 is provided on the outside of the TPE spiral columns 203, and several cavities 202 that are fused with the TPE elastic columns 204 are opened on the outer wall of the polyurethane sleeve 201.
[0024] TPE elastic columns 204, also made of TPE material, are provided on the outer wall of the TPE spiral column 203. They have good elasticity and torsional resistance and can connect the spirals on the TPE spiral column 203, improving the stability and tensile strength of the spiral. The TPE elastic columns 204 are distributed in a ring-shaped interval. This distribution structure can further improve the stability at this point. The outer part is covered with a polyurethane sleeve 201. Soft polyurethane has a thermoplastic linear structure, excellent resilience, and small compression deformation, which effectively improves the elasticity and torsional resistance at this point.
[0025] Please see Figure 4 The anti-torsion layer 2 contains an isolation layer 3, which in turn contains a wrapping tape layer 4. The wrapping tape layer 4 contains an insulating shielding layer 5, which contains an XLPE insulation layer 6. The XLPE insulation layer 6 contains a conductor shielding layer 8, and the conductor shielding layer 8 contains a conductor core 7. The insulating shielding layer 5 is a metal braided cover 501 composed of multiple strands of metal wire. The isolation layer 3 is made of flame-retardant rubber and has good insulation and flame-retardant properties, effectively preventing wire corrosion, aging, and short circuits. The tightness of the braiding of the metal braided cover 501 can be measured by the braid coverage rate, such as 65%, 85%, 90%, etc. The higher the braid coverage, the better the shielding effect is usually. The metal braided cover 501 has good flexibility and can adapt to the bending and movement of the cable. The wrapping tape layer 4 effectively prevents current leakage and electromagnetic interference, ensures the stability of signal transmission, and enhances the cable's resistance to pressure, tension and torsion. The main function of the XLPE insulation layer 6 is to isolate the high voltage electric field on the conductor from the outside world, ensure the electrical insulation performance of the cable, and prevent current leakage.
[0026] 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 torsion-resistant polyethylene-sheathed power cable, comprising a polyethylene sheath (1), characterized in that: The polyethylene sheath (1) has an anti-torsion layer (2) inside, which includes TPE spiral columns (203) and the TPE spiral columns (203) are connected by a number of elastomers.
2. The anti-torsion polyethylene sheathed power cable according to claim 1, characterized in that: The elastomer includes TPE elastic columns (204), which are arranged in a ring-shaped interval on the TPE spiral columns (203).
3. The anti-torsion polyethylene sheathed power cable according to claim 2, characterized in that: The TPE spiral column (203) is provided with a polyurethane sleeve (201) on its outside, and the outer wall of the polyurethane sleeve (201) is provided with a plurality of cavities (202) that are fused with the TPE elastic column (204).
4. The anti-torsion polyethylene sheathed power cable according to claim 1, characterized in that: The anti-torsion layer (2) has an isolation layer (3) inside, and the isolation layer (3) has a wrapping tape layer (4) inside.
5. The anti-torsion polyethylene sheathed power cable according to claim 4, characterized in that: The wrapping tape layer (4) has an insulating shielding layer (5) inside, and the insulating shielding layer (5) has an XLPE insulating layer (6) inside.
6. The anti-torsion polyethylene sheathed power cable according to claim 5, characterized in that: The XLPE insulation layer (6) has a conductor shielding layer (8) inside, and the conductor shielding layer (8) has a conductor core (7) inside.
7. The anti-torsion polyethylene sheathed power cable according to claim 5, characterized in that: The insulating shielding layer (5) is a metal woven cover (501) made of multiple strands of metal wires.