An electrical power cable with a jacket that facilitates stripping

Abstract

This utility model discloses a power cable with an easy-to-peel sheath, comprising: a sheath, a supporting skeleton provided inside the sheath, and a groove formed on the inner wall of the sheath; triangular holes formed on the inner wall of the supporting skeleton, and a filler sleeve adhered to the inner wall of the supporting skeleton. This utility model relates to the field of cable technology. The sheath and supporting skeleton, through the design of pre-cut grooves and embedded tear strips on the inner wall of the sheath, allow construction personnel to evenly tear the sheath along the groove direction simply by pulling the tear strips. Simultaneously, the weak adhesion design between the waterproof sleeve and the adhesive strip enables simultaneous peeling of the sheath and the waterproof sleeve. The triangular hole array structure on the inner wall reduces the overall weight of the cable while enhancing its tensile strength through the mechanical stability of the triangle. Combined with the outer galvanized steel strip armor layer, it can withstand greater external mechanical pressure.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a power cable with an easily removable sheath. Background Technology

[0002] In the field of power transmission, power cables are a key carrier for power transmission, and their performance directly affects the efficiency of engineering construction and the safety of power grid operation.

[0003] Traditional power cables have some problems in practical applications. The process of stripping the cable sheath is cumbersome and risky. Construction workers often rely on knives to cut forcibly, which can easily scratch the internal insulation layer or conductor, leading to a decline in electrical performance or even causing safety accidents. At the same time, the multi-layered protective structure is tightly bonded to the sheath, requiring multiple stripping operations, which significantly reduces construction efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a power cable with an easy-to-strip sheath, solving the problems of cumbersome and high-risk stripping processes in traditional power cables.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A power cable with an easily strippable sheath includes: a sheath, wherein a support frame is provided inside the sheath, and a groove is formed in the inner wall of the sheath; a triangular hole is formed in the inner wall of the support frame, a filler sleeve is bonded to the inner wall of the support frame, and a conductor shielding sleeve is bonded to the inner wall of the filler sleeve. The conductor shielding sleeve is made of a semi-conductive shielding material, which is composed of conductive fillers such as carbon black and a polymer matrix, and its function is to uniformly distribute the electric field on the conductor surface. A cable core is bonded to the inner wall of the conductor shielding sleeve.

[0007] Preferably, the filling sleeve is arranged in a ring along the center of the support frame, and the triangular holes are arranged in an array along the inner wall of the support frame. The triangular holes on the inner wall of the support frame form a hollow structure through the array arrangement, which reduces the weight of the cable and enhances the tensile strength of the cable through the mechanical structure design of the triangular holes, avoiding internal structural misalignment caused by bending or dragging.

[0008] Preferably, a waterproof sleeve is adhered to the inner wall of the sheath, an adhesive strip is adhered to the inner wall of the side of the waterproof sleeve, a tear strip is fixedly connected to the outer wall of the adhesive strip, a galvanized steel strip is adhered to the inner wall of the waterproof sleeve, and an insulating shielding sleeve is adhered to the inner wall of the galvanized steel strip. The insulating shielding sleeve is made of semi-conductive cross-linked polyethylene, which has excellent electrical insulation performance, chemical corrosion resistance and mechanical properties, and can further homogenize the electric field outside the insulation layer.

[0009] Preferably, the galvanized steel strip is wound around the outer wall of the insulating shield to form a rigid armor layer that resists external mechanical pressure and prevents rodents from biting. The outer wall of the tear strip slides in contact with the inner wall of the groove. Pulling the tear strip generates a longitudinal traction force along the groove direction. The groove serves as a pre-set weak point to reduce the tear resistance of the sheath material, causing the sheath to crack evenly along the groove direction.

[0010] Preferably, the outer wall of the support frame and the filling sleeve is bonded to the inner wall of the insulating shielding sleeve to form a rigid support layer, preventing deformation of the internal structure during peeling.

[0011] This invention provides a power cable with an easily strippable sheath. It offers the following advantages:

[0012] (i) The sheath, by pre-cutting grooves and embedding tear strips on the inner wall of the sheath, allows construction workers to simply pull the tear strips to evenly tear the sheath along the groove direction, avoiding the risk of insulation layer damage caused by traditional cutting tools. At the same time, the weak bonding design between the waterproof sleeve and the adhesive strip allows for simultaneous peeling of the sheath and the waterproof sleeve, further simplifying the construction process.

[0013] (ii) The support frame, through the triangular hole hollow array structure on the inner wall, reduces the overall weight of the cable while enhancing the tensile strength of the cable by utilizing the mechanical stability of the triangle. It effectively resists structural deformation under external forces such as bending and dragging. Combined with the outer galvanized steel strip armor layer, it can withstand greater external mechanical pressure and prevent rodents from gnawing, thereby improving the cable's adaptability and reliability in complex environments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a partial cross-sectional structural diagram of the present invention;

[0016] Figure 3 This is a front view structural diagram of the present invention;

[0017] Figure 4 This utility model Figure 3 A schematic diagram of the structure at point A.

[0018] In the diagram: 1. Sheath; 111. Groove; 2. Support frame; 3. Triangular hole; 4. Filler sleeve; 5. Conductor shielding sleeve; 6. Cable core; 7. Waterproof sleeve; 8. Tear strip; 9. Adhesive strip; 10. Galvanized steel strip; 11. Insulating shielding sleeve. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a power cable with an easy-to-strip sheath, comprising: a sheath 1, a support frame 2 provided inside the sheath 1, and a groove 111 opened on the inner wall of the sheath 1; a triangular hole 3 opened on the inner wall of the support frame 2, a filler sleeve 4 bonded to the inner wall of the support frame 2, a conductor shielding sleeve 5 bonded to the inner wall of the filler sleeve 4, the conductor shielding sleeve 5 is made of semi-conductive shielding material, which is made of conductive fillers such as carbon black mixed with a polymer matrix, and its function is to uniformly distribute the electric field on the conductor surface; a cable core 6 is bonded to the inner wall of the conductor shielding sleeve 5.

[0021] The filler sleeve 4 is arranged in a ring along the center of the support frame 2. The triangular holes 3 are arranged in an array along the inner wall of the support frame 2. The triangular holes 3 on the inner wall of the support frame 2 form a hollow structure through the array arrangement, which reduces the weight of the cable. At the same time, the mechanical structure design of the triangular holes 3 enhances the tensile strength of the cable and avoids internal structural misalignment due to bending or dragging.

[0022] A waterproof sleeve 7 is bonded to the inner wall of the sheath 1. An adhesive strip 9 is bonded to the inner wall of the side of the waterproof sleeve 7. A tear strip 8 is fixedly connected to the outer wall of the adhesive strip 9. A galvanized steel strip 10 is bonded to the inner wall of the waterproof sleeve 7. An insulating shielding sleeve 11 is bonded to the inner wall of the galvanized steel strip 10. The insulating shielding sleeve 11 is made of semi-conductive cross-linked polyethylene, which has excellent electrical insulation performance, chemical corrosion resistance and mechanical properties, and can further homogenize the electric field outside the insulation layer.

[0023] Galvanized steel strip 10 is wrapped around the outer wall of insulating shield 11 to form a rigid armor layer that resists external mechanical pressure and prevents rodents from biting. The outer wall of tear strip 8 slides in contact with the inner wall of groove 111. Pulling tear strip 8 generates longitudinal traction force along the direction of groove 111. Groove 111 serves as a pre-set weak point to reduce the tear resistance of sheath 1 material, causing sheath 1 to crack evenly along the direction of groove 111.

[0024] The outer walls of the supporting frame 2 and the filling sleeve 4 are bonded to the inner wall of the insulating shielding sleeve 11 to form a rigid support layer, preventing deformation of the internal structure during peeling.

[0025] In use, a groove 111 is cut into the inner wall of the sheath 1, and a tear strip 8 is fixed by an adhesive strip 9. The outer wall of the tear strip 8 slides in contact with the inner wall of the groove 111. During construction, the tear strip 8 is pulled, and it generates longitudinal traction force along the direction of the groove 111. The groove 111 serves as a pre-set weak point to reduce the tear resistance of the sheath 1 material, so that the sheath 1 cracks evenly along the direction of the groove 111, avoiding irregular tearing during traditional peeling. At the same time, the adhesive strip 9 is also connected to the waterproof sleeve 7 by a weak adhesive material. With the mechanical guidance of the tear strip 8, the waterproof sleeve 7 is further peeled off.

[0026] The triangular holes 3 on the inner wall of the support frame 2 form a hollow structure through an array arrangement, which reduces the weight of the cable and enhances the tensile strength of the cable through the mechanical structure design of the triangular holes 3, preventing internal structural misalignment due to bending or dragging. The outer wall of the support frame 2 and the filler sleeve 4 are bonded to the insulating shield sleeve 11 to form a rigid support layer, preventing internal structural deformation during peeling. The conductor shield sleeve 5 on the inner wall of the filler sleeve 4 is a semi-conductive material made of carbon black and other conductive fillers mixed with a polymer matrix, which is closely attached to the cable core 6 to convert the irregular electric field lines on the conductor surface into a uniformly distributed electric field, avoiding insulation breakdown caused by local electric field concentration. At the same time, the semi-conductive cross-linked polyethylene material of the insulating shield sleeve 11 wraps the outside of the insulation layer, forming an inner and outer double shield with the conductor shield sleeve 5, further uniformizing the electric field outside the insulation layer and meeting the electrical safety requirements of high-voltage cables. The galvanized steel strip 10 is wrapped around the outside of the insulating shield sleeve 11 to form a rigid armor layer to resist external mechanical pressure and prevent rodents from gnawing.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A power cable with an easily strippable sheath, characterized in that, include: Sheath (1), the sheath (1) is provided with a support frame (2) inside, and the inner wall of the sheath (1) is provided with a groove (111). The inner wall of the support frame (2) is provided with a triangular hole (3), the inner wall of the support frame (2) is bonded with a filler sleeve (4), the inner wall of the filler sleeve (4) is bonded with a conductor shielding sleeve (5), and the inner wall of the conductor shielding sleeve (5) is bonded with a cable core (6).

2. The power cable with easily stripped sheath according to claim 1, characterized in that: The filling sleeve (4) is arranged in a ring along the center of the support frame (2), and the triangular holes (3) are arranged in an array along the inner wall of the support frame (2).

3. The power cable with easily stripped sheath according to claim 1, characterized in that: The inner wall of the sheath (1) is bonded with a waterproof sleeve (7), the inner wall of the side of the waterproof sleeve (7) is bonded with an adhesive strip (9), the outer wall of the adhesive strip (9) is fixedly connected with a tear strip (8), the inner wall of the waterproof sleeve (7) is bonded with a galvanized steel strip (10), and the inner wall of the galvanized steel strip (10) is bonded with an insulating shielding sleeve (11).

4. A power cable with easily stripped sheath according to claim 3, characterized in that: The galvanized steel strip (10) is wrapped around the outer wall of the insulating shield (11), and the outer wall of the tear strip (8) slides in contact with the inner wall of the groove (111).

5. A power cable with easily stripped sheath according to claim 1, characterized in that: The outer walls of the supporting frame (2) and the filling sleeve (4) are bonded to the inner wall of the insulating shielding sleeve (11).

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