Peelable user side power supply cable

Abstract

The utility model discloses a strippable user side power supply cable, which is provided with a cable core formed by compounding at least one main insulation wire core, at least one neutral wire core, at least one signal wire core and at least one grounding wire core, and at least one sheath layer is coated outside the cable core; and at least one cable opening rope is pre-embedded between the cable core and the adjacent sheath layer along the length direction of the cable core. According to the utility model, aiming at the particularity of the composite cable core structure of the user-side power supply cable, the cable opening rope is arranged between the cable core and the adjacent sheath layer, when the cable is laid and wired on site, the cable opening rope is pulled at the end part of the cable to tear the sheath layer at the end part, and the cable core with the composite structure is directly exposed; therefore, the functional wire core of the composite structure cable core can be quickly identified and clarified.

Description

Technical Field

[0001] The utility model relates to a cable, in particular to a strippable user-end power supply cable. Background Art

[0002] The user-side power supply cable is the key electrical connection structure for the user's electrical facilities to access the power supply line, and is directly related to the user's power safety. In order to ensure the personal safety of users and the stable operation of electrical facilities, in addition to the power insulation core (i.e., the main insulation core), a neutral core is also set in the cable core structure of the user-side power supply cable. The neutral core is used as the return path of the current in the circuit. Under normal circumstances, it carries the harmonic current mainly caused by the phase current imbalance, and improves the lightning protection performance. For example, the Chinese patent literature discloses the name of "frequency conversion cable" (publication number CN202268204 U, published on June 6, 2012), "high-load high-temperature resistant soft power cable for frequency converter" (publication number CN2762296 Y, published on March 1, 2006), "environmentally friendly frequency conversion cable" (publication number CN 202268186 U, published on June 6, 2012) and other technologies.

[0003] Since the cable core structure of the user-side power supply cable is a composite structure composed of wire cores with different functions, it is necessary to strip the end when laying the wires to clarify the wire cores with different functions and uses in the cable core. In the user-side power supply cable structure mastered by the applicant, no cable stripping technology for auxiliary end stripping has been disclosed. The conventional end stripping operation of the user-side power supply cable is achieved by directly tearing the structural layer of the cable end with tools such as paper cutters and needle-nosed pliers. The operation process is cumbersome, laborious, and time-consuming, and it is also easy to damage the cable core structure.

[0004] During the search by the applicant, it was found that the prior art disclosed that an opening rope is arranged inside the communication cable, and the opening rope is used to pull and tear the external protective structure of the cable to assist the end stripping and improve the stripping efficiency. For example, the names disclosed in the Chinese patent literature are "A flexible anti-interference composite communication cable" (publication number CN 114898940 A, publication date August 12, 2022), "A medium-voltage optical fiber composite cable" (publication number CN103646714 A, publication date March 19, 2014), "A clustered coaxial cable" (publication number CN 219916745 U, publication date October 27, 2023), "Aluminum alloy conductor optical fiber composite cable" (publication number CN 103646716A, publication date March 19, 2014), and "Optoelectronic composite shielded cable for communication room" (publication number CN 220020720 U, publication date November 14, 2023). However, the cable opening technology for auxiliary end stripping disclosed in these technologies is based on the molding structure of the communication cable, and the cable opening rope is set in the protective layer structure outside the cable core, and is not adjacent to the cable core. That is, when stripping the wire, only part of the structural layer outside the cable core is torn open, and other structural layers adjacent to the cable core are intact. Obviously, this technology is not suitable for the cable opening design of the user-side power supply cable. Utility Model Content

[0005] The technical purpose of the utility model is to provide a strippable user-end power supply cable that is conducive to easy and efficient end stripping operations in view of the particularity of the above-mentioned user-end power supply cable and the deficiencies of the prior art.

[0006] The technical purpose of the utility model is achieved by the following technical solution: a strippable user-end power supply cable, the cable having a cable core composed of at least one main insulating core, at least one neutral core, at least one signal core and at least one grounding core, the outside of the cable core is coated with at least one sheath layer;

[0007] At least one open cable is pre-buried between the cable core and the adjacent sheath layer along the length direction of the cable core.

[0008] The user-side power supply cable of the above structure has a diverse cable core composite structure. When laying and wiring on site, it is technically difficult to identify and clarify the cable core. It is necessary to design a cable opening structure for auxiliary end stripping.

[0009] The above technical measures are aimed at the special structure of the composite cable core of the above user-end power supply cable, and a cable opening rope is set between the cable core and the adjacent sheath layer. When laying the wiring on site, the end sheath layer is torn by pulling the cable opening rope at the end of the cable, directly exposing the composite structure cable core, so as to quickly identify and clarify the functional core of the composite structure cable core. Compared with the traditional end stripping operation, the above technical measures have the technical characteristics of convenient, easy and efficient end stripping operation, avoiding damage to the cable core. Compared with the existing cable opening structure of the communication cable, the above technical measures are more applicable to the user-end power supply cable with a complex composite cable core structure, and can be directly stripped in place, reducing the secondary tearing and stripping operation, and avoiding damage to the cable core.

[0010] As one of the preferred solutions, the cable core is coated with two sheath layers from the inside to the outside, the inner sheath layer is an extruded structure of a colored polyethylene material, and the outer sheath layer is an extruded structure of a transparent UV-proof plastic compound or a UV-proof film wrapped structure;

[0011] The open cable is arranged between the inner sheath layer and the cable core.

[0012] The above technical measures are achieved by setting up an inner and outer two-layer sheath layer structure, with the inner sheath layer forming a colored sheath structure that is easy to visually identify, and the outer sheath layer is used to reinforce the technical problem of insufficient weather resistance of the colored inner sheath layer. The transparent outer sheath layer structure will not hinder the intuitive identification of the colored inner sheath layer, and the two have good synergy.

[0013] As one of the preferred solutions, the cable opening rope is a nylon rope structure with a diameter of 0.5-1mm or a polyester filament structure with a diameter of 2500-5000D. The cable opening rope of this technical measure, on the one hand, will not hinder the composite structure of the cable core and the molding structure of the outer sheath layer of the cable core because of its small size; on the other hand, it has excellent tensile properties and is not easy to break when pulled during the stripping operation; on the third hand, it has excellent flexibility and can be reliably applied to the outside of the cable core when the sheath layer is overmolded, and will not cause warping deformation to affect the molding of the sheath layer or even radially expose the sheath layer.

[0014] As one of the preferred schemes, the cable core is composed of a main insulating core, multiple neutral cores, multiple signal cores and multiple grounding cores, and the multiple neutral cores, multiple signal cores and multiple grounding cores are sparsely arranged on the outside of the main insulating core in a concentric sparse winding structure.

[0015] The cable core structure of the above technical measures makes the neutral core, signal core and ground core coaxially and sparsely wound outside the main insulating core, which is conducive to making the composite structure cable core compact while meeting the use function. Moreover, in the composite structure cable core, the neutral core outside the main insulating core achieves the technical effect of one line for two purposes, that is, on the one hand, it plays the role of neutral current carrier in the cable structure, and on the other hand, it plays the role of shielding against electromagnetic interference in the cable structure, so that the cable structure does not need to add an additional shielding layer against electromagnetic interference, which is conducive to the compactness and lightness of the formed cable structure.

[0016] Furthermore, in the concentric sparse winding structure, the signal core is placed on both sides of the neutral core to separate the neutral core from the ground core. This technical measure can effectively avoid mutual interference between the neutral core and the ground core, so as to ensure that the user-side power supply cable can be stably and reliably connected to the circuit system.

[0017] Furthermore, the outer surface of the neutral core, the signal core and / or the ground core is a non-smooth friction-increasing structure;

[0018] The roughness of the friction-increasing structure is 25 to 50 Ra;

[0019] Correspondingly, the inner outer surfaces of the neutral core, the signal core and / or the ground core form a frictional contact with the main insulating core, and the outer outer surfaces of the neutral core, the signal core and / or the ground core form a frictional contact with the inner sheath layer.

[0020] The neutral core, signal core and / or ground core of the above technical measures can form stable contact and adhesion with the main insulating core adjacent to the inner side and the inner sheath layer adjacent to the outer side in the sparse winding structure, respectively, and have a good anti-slip effect.

[0021] As one of the preferred solutions, the neutral line core has 6 to 9 neutral conductors arranged side by side at a distance, and each neutral conductor is a single solid copper wire structure; the outside of each neutral conductor is extruded with a relatively independent neutral insulation layer made of polyethylene material, and the adjacent neutral insulation layers are transitioned by an integrally formed connecting rib, and each neutral conductor is formed in the same insulation structure with a distanced side by side structure;

[0022] When the neutral core is in an unfolded state, the transverse cross section presents a straight-line structure with wavy top and bottom sides.

[0023] The above technical measures are based on the arrangement structure of two neutral conductors in the cable structure, and multiple neutral conductors are arranged side by side in the same insulation structure to form an integrated related structure with a straight cross section through the same insulation structure. It has the following technical advantages:

[0024] On the one hand, multiple neutral conductors connected in a straight line are easy to be sparsely wound outside the main insulated core;

[0025] Secondly, the multiple neutral conductors of the overall connection structure can be sparsely wound on the outside of the main insulating core in a standardized and orderly manner, and are compactly and standardizedly formed on the outside of the main insulating core, and are not easy to loosen or deform;

[0026] Thirdly, the standardized and orderly winding of the neutral core can effectively balance the electric field outside the main insulation core, thereby reliably enhancing the anti-electromagnetic interference performance of the user-side power supply cable;

[0027] Fourthly, it has good insulation performance, which is conducive to reducing the technical requirements for the insulation performance of other external protective structure layers, has good safety, and is conducive to simplifying the molding structure of the user-side power supply cable.

[0028] As one of the preferred solutions, the signal wire core is composed of a signal conductor and a signal insulation layer extruded outside the signal conductor;

[0029] The signal conductor is a single solid copper wire structure;

[0030] The signal insulation layer is an extruded structure of polyethylene material.

[0031] The signal core of the signal line of the above technical measures has stable signal transmission, which is conducive to reducing the technical requirements for the insulation performance of other external protective structure layers, and further helps to simplify the molding structure of the user-side power supply cable.

[0032] The signal line core of the above-mentioned technical measures can form a signal loop during application to enhance the anti-theft, monitoring and other early warning functions of the user-side electrical facilities during electricity use.

[0033] As one of the preferred solutions, the main insulated core is composed of a main conductor, a main insulating layer and a main insulating protective layer arranged in sequence from the inside to the outside;

[0034] The main conductor is any one of a structure of twisted copper wires, a single solid copper wire, a structure of twisted aluminum wires, a single solid aluminum wire, a structure of twisted copper wires with a reinforcing core, or a structure of twisted aluminum wires with a reinforcing core;

[0035] The main insulating layer is an extruded structure of colored polyethylene material;

[0036] The main insulating protective layer is a transparent UV-proof plastic compound extruded structure or a UV-proof film wrapped structure.

[0037] The above-mentioned technical measures are achieved by setting up an inner and outer two-layer insulation layer structure outside the main conductor, so that the main insulation layer is formed into a colored insulation structure that is easy to visually identify and has reliable insulation performance, and the main insulation protective layer is used to reinforce the technical problem of insufficient weather resistance of the colored main insulation layer. The transparent main insulation protective layer structure will not hinder the intuitive identification of the colored main insulation layer, and the two have good synergy.

[0038] As one of the preferred solutions, the grounding wire core is a single solid bare copper wire structure or a single solid bare aluminum wire structure. The grounding wire core of this technical measure can enhance the protection function of cable short circuit grounding in application.

[0039] The beneficial technical effect of the utility model is that the above technical measures aim at the special structure of the composite cable core of the user-side power supply cable, and an opening cable is arranged between the cable core and the adjacent sheath layer. When laying the wiring on site, the end sheath layer is torn by pulling the opening cable at the end of the cable, directly exposing the composite structure cable core, so as to quickly identify and clarify the functional core of the composite structure cable core.

[0040] Compared with the traditional end stripping operation, the above technical measures have the technical characteristics of convenient, easy and efficient end stripping operation, avoiding damage to the cable core.

[0041] Compared with the existing cable opening structure of communication cables, the above technical measures are more applicable to user-end power supply cables with complex composite cable core structures. They can be stripped directly in one go, reducing secondary tearing and stripping operations and avoiding damage to the cable core. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of the utility model.

[0043] Figure 2 for Figure 1 Schematic diagram of the structure of the neutral core in the unfolded state.

[0044] The meaning of the codes in the figure are: 1—main insulated core; 11—main conductor; 12—main insulation layer; 13—main insulation protective layer; 2—neutral core; 21—neutral conductor; 22—neutral insulation layer; 23—connecting rib; 3—signal core; 31—signal conductor; 32—signal insulation layer; 4—ground core; 5—open cable; 6—inner sheath layer; 7—outer sheath layer. DETAILED DESCRIPTION

[0045] The utility model relates to a cable, specifically a strippable user-side power supply cable. The main technical solution of the utility model is specifically described below in combination with multiple embodiments. Figure 1 and Figure 2The technical solution of the utility model is clearly and in detail explained; although other embodiments are not separately drawn with drawings, their main structures can still refer to the drawings of embodiment 1.

[0046] It should be noted that the drawings of the present invention are schematic, and unnecessary details have been simplified to clarify the technical purpose of the present invention, so as to avoid blurring the technical solution of the present invention in the prior art. In addition, the expressions "approximately" and "substantially" in the following text regarding quantity or matching relationship mean that reasonable assembly errors and processing errors in the industry are allowed to exist, and do not literally express absolute quantity or matching relationship.

[0047] Example 1

[0048] See also Figure 1 As shown, the utility model is a user-end power supply cable with an open cable structure, which is composed of a cable core of a composite structure, and an inner sheath layer 6 and an outer sheath layer 7 that sequentially cover the outside of the cable core from the inside to the outside. The cable core of the composite structure is composed of a main insulating core 1, seven neutral cores 2, two signal cores 3 and three grounding cores 4. The specific composite structure is that the seven neutral cores 2, two signal cores 3 and three grounding cores 4 are sparsely wound and arranged on the outside of the main insulating core 1 in a concentric sparse winding structure, and the sparse winding pitch is usually not more than 10 times the outer diameter of the concentric layer, so that the cable structure space can be effectively utilized, the cable function composite integration can be realized, and the cable structure size can be ensured to be compact.

[0049] In the above structure, the main insulated wire core 1 is composed of a main conductor 11 of a twisted structure of a plurality of tinned copper wires, a main insulating layer 12 extruded outside the main conductor 11, and a main insulating protective layer 13 extruded outside the main insulating layer 12. In order to facilitate wiring identification, the main insulating layer 12 is an extruded structure of a colored polyethylene material. The main insulating protective layer 13 is an extruded structure of a transparent UV-resistant plastic compound with a thickness of about 0.25 mm, which enhances the aging resistance of the main insulating layer 12 and facilitates intuitive identification of the main conductor 11 covered by the main insulating layer 12.

[0050] In the above structure, the seven neutral cores 2 are an integrally associated structure. Figure 2As shown, the neutral core 2 has seven neutral conductors 21 spaced apart and arranged side by side in the same insulating structure, and adjacent neutral conductors 21 are separated by insulating structures. Each neutral conductor 21 is a single solid copper wire structure, and the diameter of the copper wire is determined by the current-carrying specification of the user-end power supply cable to be formed, and is not a specific value. The outside of each neutral conductor 21 is extruded with a relatively independent neutral insulating layer 22 with a polyethylene material extrusion structure. The outer contour of each neutral insulating layer 22 is circular, and its thickness is about 0.30 mm. Adjacent neutral insulating layers 22 are transitioned by an integrally formed connecting rib 23, that is, the connecting rib 23 is also an extruded structure of polyethylene material, and is extruded integrally with the neutral insulating layer 22, and the length of the connecting rib 23 is about 0.30 mm. Under the transition connection of the connecting rib 23, a matching gap of a concave structure is formed between the adjacent neutral insulating layers 22 at both ends of the connecting rib 23, that is, the adjacent neutral insulating layers 22 under the transition connection of the connecting rib 23 are dumbbell-shaped. The neutral core 2 of the above structure, when in the unfolded state, has a wavy I-shaped structure on both the top and bottom sides in the transverse cross section, which is conducive to sparse winding outside the main insulating core 1 and enhanced adhesion.

[0051] The two signal cores 3 are independent structures. Each signal core 3 is composed of a signal conductor 31 and a signal insulation layer 32 wrapped on the outside. The signal conductor 31 adopts a single solid copper wire structure, and the signal insulation layer 32 is an extruded structure of polyethylene material. In the above-mentioned concentric sparse winding structure, the two signal cores 3 are placed on both sides of the overall associated neutral core 2, separating the neutral core 2 from the three grounding cores 4. The signal insulation layers 32 of the two signal cores 3 can use different insulation colors to distinguish the positive and negative poles (for example, the signal insulation layer of one signal core is blue, and the signal insulation layer of the other signal core is white, etc.), forming a signal loop in the application.

[0052] The three grounding wire cores 4 are independent structures. Each grounding wire core 4 is composed of a single solid bare copper wire, which enhances the protection function of cable short circuit grounding in application.

[0053] In the above-mentioned concentric sparse winding structure, in order to enhance the anti-slip adhesion with the main insulating core 1 and the inner sheath layer 6, the outer surface of the insulation structure of the neutral core 2 is set as a non-smooth friction-enhancing structure by roughening or grinding, the outer surface of the insulation structure of the signal core 3 is set as a non-smooth friction-enhancing structure by roughening or grinding, and the outer surface of the grounding core 4 is set as a non-smooth friction-enhancing structure by roughening or grinding. The roughness of the friction-enhancing structure of each core is about 40Ra. In the concentric sparse winding structure, the friction-enhancing inner outer surface of each core forms a friction contact with the insulation structure of the main insulating core 1, and the friction-enhancing outer surface of each core forms a friction contact with the inner sheath layer 6 coated on the outside.

[0054] The inner sheath layer 6 is an extruded structure of a colored polyethylene material that is UV-proof, rodent-proof and termite-proof, and the thickness of the extrusion is about 1.6 mm, ensuring that the cable has the properties of UV-proof, rodent-proof and termite-proof.

[0055] The outer sheath layer 7 is a transparent UV-proof plastic compound extruded structure with a thickness of about 0.25 mm, which enhances the weather resistance of the inner sheath layer 6 .

[0056] In order to easily and efficiently realize end stripping when laying the wiring, an open cable 5 is pre-buried between the outside of the composite structure cable core and the adjacent inner sheath layer 6 along the length direction of the cable core, that is, the open cable 5 is arranged between the inner sheath layer 6 and the cable core. The open cable 5 is formed by a nylon rope structure with a diameter of about 1 mm.

[0057] Example 2

[0058] The utility model is a user-side power supply cable with an open cable structure, which is composed of a cable core of a composite structure, and an inner sheath layer and an outer sheath layer that sequentially cover the outside of the cable core from the inside to the outside. The cable core of the composite structure is composed of a main insulating core, six neutral cores, two signal cores and four grounding cores; the specific composite structure is that the six neutral cores, two signal cores and four grounding cores are sparsely wound and arranged on the outside of the main insulating core in a concentric sparse winding structure, and the sparse winding pitch is usually not greater than 10 times the outer diameter of the concentric layer, so that the cable structure space can be effectively utilized, the cable function composite integration can be realized, and the cable structure size can be ensured to be compact.

[0059] In the above structure, the main insulated wire core is composed of a main conductor with a plurality of aluminum wires twisted together with a reinforcing core, a main insulating layer extruded outside the main conductor, and a main insulating protective layer extruded outside the main insulating layer. The reinforcing core is a fiber rope structure. In order to facilitate wiring identification, the main insulating layer is an extruded structure of colored polyethylene material. The main insulating protective layer is a transparent UV-proof film wrapped structure with a thickness of about 0.30 mm. It enhances the aging resistance of the main insulating layer and facilitates intuitive identification of the main conductor covered by the main insulating layer.

[0060] In the above structure, the six neutral cores are an integrally associated structure. Specifically, the neutral core has six neutral conductors spaced and arranged side by side in the same insulation structure, and adjacent neutral conductors are separated by an insulation structure. Each neutral conductor is a single solid copper wire structure, and the diameter of the copper wire is determined by the current-carrying specification of the user-end power supply cable to be formed, and is not a specific value. The outside of each neutral conductor is extruded with a relatively independent neutral insulation layer with a polyethylene material extrusion structure. The outer contour of each neutral insulation layer is circular, and its thickness is about 0.40mm. Adjacent neutral insulation layers are transitioned by an integrally formed connecting rib, that is, the connecting rib is also an extruded structure of polyethylene material, and is extruded integrally with the neutral insulation layer, and the length of the connecting rib is about 0.35mm. Under the transition connection of the connecting rib, a matching gap of a concave structure is formed between the adjacent neutral insulation layers at both ends of the connecting rib, that is, the adjacent neutral insulation layers under the transition connection of the connecting rib are dumbbell-shaped. The neutral core of the above structure, when in the unfolded state, has a wavy I-shaped structure on the top and bottom sides in the transverse cross section, which is conducive to sparse winding and enhanced adhesion outside the main insulating core.

[0061] The two signal cores are independent structures. Each signal core is composed of a signal conductor and a signal insulation layer wrapped on the outside. The signal conductor adopts a single solid copper wire structure, and the signal insulation layer is an extruded structure of polyethylene material. In the above-mentioned concentric sparse winding structure, the two signal cores are placed on both sides of the overall associated neutral core, separating the neutral core from the four grounding cores. The signal insulation layers of the two signal cores can use different insulation colors to distinguish the positive and negative poles (for example, the signal insulation layer of one signal core is blue, and the signal insulation layer of the other signal core is white, etc.), forming a signal loop in the application.

[0062] The four grounding wire cores are independent of each other. Each grounding wire core is composed of a single solid bare aluminum wire, which enhances the protection function of cable short circuit grounding in application.

[0063] In the above-mentioned concentric sparse winding structure, in order to enhance the anti-slip adhesion with the main insulating core and the inner sheath layer, the outer surface of the insulation structure of the neutral core is set as a non-smooth friction-enhancing structure by roughening or grinding, the outer surface of the insulation structure of the signal core is set as a non-smooth friction-enhancing structure by roughening or grinding, and the outer surface of the grounding core is set as a non-smooth friction-enhancing structure by roughening or grinding. The roughness of the friction-enhancing structure of each core is about 25Ra. In the concentric sparse winding structure, the friction-enhancing inner outer surface of each core forms a friction contact with the insulation structure of the main insulating core, and the friction-enhancing outer surface of each core forms a friction contact with the inner sheath layer coated on the outside.

[0064] The inner sheath layer is an extruded structure of colored polyethylene material that is UV-proof, rat-proof and termite-proof. The thickness of the extrusion is about 1.5mm, ensuring that the cable has the characteristics of UV-proof, rat-proof and termite-proof.

[0065] The outer sheath layer is a transparent UV-proof film wrapping structure with a thickness of about 0.30 mm, which enhances the weather resistance of the inner sheath layer.

[0066] In order to easily and efficiently strip the wire ends during wiring, an open cable is pre-buried between the outside of the composite cable core and the adjacent inner sheath layer along the length of the cable core, that is, the open cable is arranged between the inner sheath layer and the cable core. The open cable is formed of a nylon rope structure with a diameter of about 0.5 mm.

[0067] Example 3

[0068] The utility model is a user-side power supply cable with an open cable structure, which is composed of a cable core of a composite structure, and an inner sheath layer and an outer sheath layer that sequentially cover the outside of the cable core from the inside to the outside. The cable core of the composite structure is composed of a main insulating core, nine neutral cores, two signal cores and three grounding cores; the specific composite structure is that the nine neutral cores, two signal cores and three grounding cores are sparsely wound and arranged on the outside of the main insulating core in a concentric sparse winding structure, and the sparse winding pitch is usually not greater than 10 times the outer diameter of the concentric layer, so that the cable structure space can be effectively utilized, the cable function composite integration can be realized, and the cable structure size can be ensured to be compact.

[0069] In the above structure, the main insulated wire core is composed of a main conductor with a plurality of copper wires twisted together with a reinforcing core, a main insulating layer extruded outside the main conductor, and a main insulating protective layer extruded outside the main insulating layer. The reinforcing core of the main conductor adopts a fiber rope structure. In order to facilitate wiring identification, the main insulating layer is an extruded structure of colored polyethylene material. The main insulating protective layer is a transparent anti-ultraviolet film wrapped structure with a thickness of about 0.30mm. It enhances the aging resistance of the main insulating layer and facilitates intuitive identification of the main conductor covered by the main insulating layer.

[0070] In the above structure, the nine neutral cores are an integrally associated structure. Specifically, the neutral core has nine neutral conductors spaced and arranged side by side in the same insulation structure, and adjacent neutral conductors are separated by an insulation structure. Each neutral conductor is a single solid copper wire structure, and the diameter of the copper wire is determined by the current-carrying specification of the user-end power supply cable to be formed, and is not a specific value. The outside of each neutral conductor is extruded with a relatively independent neutral insulation layer with a polyethylene material extrusion structure. The outer contour of each neutral insulation layer is circular, and its thickness is about 0.25mm. Adjacent neutral insulation layers are transitioned by an integrally formed connecting rib, that is, the connecting rib is also an extruded structure of polyethylene material, and is extruded integrally with the neutral insulation layer, and the length of the connecting rib is about 0.25mm. Under the transition connection of the connecting rib, a matching gap of a concave structure is formed between the adjacent neutral insulation layers at both ends of the connecting rib, that is, the adjacent neutral insulation layers under the transition connection of the connecting rib are dumbbell-shaped. The neutral core of the above structure, when in the unfolded state, has a wavy I-shaped structure on the top and bottom sides in the transverse cross section, which is conducive to sparse winding and enhanced adhesion outside the main insulating core.

[0071] The two signal cores are independent structures. Each signal core is composed of a signal conductor and a signal insulation layer wrapped on the outside. The signal conductor adopts a single solid copper wire structure, and the signal insulation layer is an extruded structure of polyethylene material. In the above-mentioned concentric sparse winding structure, the two signal cores are placed on both sides of the overall associated neutral core, separating the neutral core from the three grounding cores. The signal insulation layers of the two signal cores can use different insulation colors to distinguish the positive and negative poles (for example, the signal insulation layer of one signal core is blue, and the signal insulation layer of the other signal core is white, etc.), forming a signal loop in the application.

[0072] The three grounding cores are independent structures. Each grounding core is composed of a single solid bare copper wire, which enhances the protection function of cable short-circuit grounding in application.

[0073] In the above-mentioned concentric sparse winding structure, in order to enhance the anti-slip adhesion with the main insulating core and the inner sheath layer, the outer surface of the insulation structure of the neutral core is set as a non-smooth friction-enhancing structure by roughening or grinding, the outer surface of the insulation structure of the signal core is set as a non-smooth friction-enhancing structure by roughening or grinding, and the outer surface of the grounding core is set as a non-smooth friction-enhancing structure by roughening or grinding. The roughness of the friction-enhancing structure of each core is about 30Ra. In the concentric sparse winding structure, the friction-enhancing inner outer surface of each core forms a friction contact with the insulation structure of the main insulating core, and the friction-enhancing outer surface of each core forms a friction contact with the inner sheath layer coated on the outside.

[0074] The inner sheath layer is an extruded structure of colored polyethylene material that is UV-proof, rat-proof and termite-proof. The thickness of the extrusion is about 1.8mm, ensuring that the cable has the characteristics of UV-proof, rat-proof and termite-proof.

[0075] The outer sheath layer is a transparent UV-proof film wrapping structure with a thickness of about 0.30 mm, which enhances the weather resistance of the inner sheath layer.

[0076] In order to easily and efficiently strip the end wires during wiring, an open cable is pre-buried between the outside of the composite cable core and the adjacent inner sheath layer along the length of the cable core, that is, the open cable is arranged between the inner sheath layer and the cable core. The open cable is formed with a polyester yarn structure of about 3000D.

[0077] Example 4

[0078] The utility model is a user-side power supply cable with an open cable structure, which is composed of a cable core of a composite structure, and an inner sheath layer and an outer sheath layer that sequentially cover the outside of the cable core from the inside to the outside. The cable core of the composite structure is composed of a main insulating core, eight neutral cores, two signal cores and three grounding cores; the specific composite structure is that the eight neutral cores, two signal cores and three grounding cores are sparsely wound and arranged on the outside of the main insulating core in a concentric sparse winding structure, and the sparse winding pitch is usually not greater than 10 times the outer diameter of the concentric layer, so that the cable structure space can be effectively utilized, the cable function composite integration can be realized, and the cable structure size can be ensured to be compact.

[0079] In the above structure, the main insulated wire core is composed of a main conductor of a single solid aluminum wire structure, a main insulation layer extruded outside the main conductor, and a main insulation protective layer extruded outside the main insulation layer. In order to facilitate wiring identification, the main insulation layer is an extruded structure of colored polyethylene material. The main insulation protective layer is an extruded structure of a transparent UV-resistant plastic compound with a thickness of about 0.28mm, which enhances the aging resistance of the main insulation layer and facilitates intuitive identification of the main conductor covered by the main insulation layer.

[0080] In the above structure, the eight neutral cores are an integrally associated structure. Specifically, the neutral core has eight neutral conductors spaced and arranged side by side in the same insulation structure, and adjacent neutral conductors are separated by an insulation structure. Each neutral conductor is a single solid copper wire structure, and the diameter of the copper wire is determined by the current-carrying specification of the user-end power supply cable to be formed, and is not a specific value. The outside of each neutral conductor is extruded with a relatively independent neutral insulation layer with a polyethylene material extrusion structure. The outer contour of each neutral insulation layer is circular, and its thickness is about 0.35mm. Adjacent neutral insulation layers are transitioned by an integrally formed connecting rib, that is, the connecting rib is also an extruded structure of polyethylene material, and is extruded integrally with the neutral insulation layer, and the length of the connecting rib is about 0.30mm. Under the transition connection of the connecting rib, a matching gap of a concave structure is formed between the adjacent neutral insulation layers at both ends of the connecting rib, that is, the adjacent neutral insulation layers under the transition connection of the connecting rib are dumbbell-shaped. The neutral core of the above structure, when in the unfolded state, has a wavy I-shaped structure on the top and bottom sides in the transverse cross section, which is conducive to sparse winding and enhanced adhesion outside the main insulating core.

[0081] The two signal cores are independent structures. Each signal core is composed of a signal conductor and a signal insulation layer wrapped on the outside. The signal conductor adopts a single solid copper wire structure, and the signal insulation layer is an extruded structure of polyethylene material. In the above-mentioned concentric sparse winding structure, the two signal cores are placed on both sides of the overall associated neutral core, separating the neutral core from the three grounding cores. The signal insulation layers of the two signal cores can use different insulation colors to distinguish the positive and negative poles (for example, the signal insulation layer of one signal core is blue, and the signal insulation layer of the other signal core is white, etc.), forming a signal loop in the application.

[0082] The three grounding cores are independent structures. Each grounding core is composed of a single solid bare aluminum wire, which enhances the protection function of cable short-circuit grounding in application.

[0083] In the above-mentioned concentric sparse winding structure, in order to enhance the anti-slip adhesion with the main insulating core and the inner sheath layer, the outer surface of the insulation structure of the neutral core is set as a non-smooth friction-enhancing structure by roughening or grinding, the outer surface of the insulation structure of the signal core is set as a non-smooth friction-enhancing structure by roughening or grinding, and the outer surface of the grounding core is set as a non-smooth friction-enhancing structure by roughening or grinding. The roughness of the friction-enhancing structure of each core is about 50Ra. In the concentric sparse winding structure, the friction-enhancing inner outer surface of each core forms a friction contact with the insulation structure of the main insulating core, and the friction-enhancing outer surface of each core forms a friction contact with the inner sheath layer coated on the outside.

[0084] The inner sheath layer is an extruded structure of colored polyethylene material that is UV-proof, rat-proof and termite-proof. The thickness of the extrusion is about 2.0mm, ensuring that the cable has the characteristics of UV-proof, rat-proof and termite-proof.

[0085] The outer sheath layer is a transparent UV-proof plastic compound extruded structure with a thickness of about 0.28 mm, which enhances the weather resistance of the inner sheath layer.

[0086] In order to easily and efficiently strip the end wires during wiring, an open cable is pre-buried between the outside of the composite cable core and the adjacent inner sheath layer along the length of the cable core, that is, the open cable is arranged between the inner sheath layer and the cable core. The open cable is formed with a polyester yarn structure of about 4000D.

[0087] Example 5

[0088] The utility model is a user-side power supply cable with an open cable structure, which is composed of a cable core of a composite structure, and an inner sheath layer and an outer sheath layer that sequentially cover the outside of the cable core from the inside to the outside. The cable core of the composite structure is composed of a main insulating core, seven neutral cores, two signal cores and five grounding cores; the specific composite structure is that the seven neutral cores, two signal cores and five grounding cores are sparsely wound and arranged on the outside of the main insulating core in a concentric sparse winding structure, and the sparse winding pitch is usually not more than 10 times the outer diameter of the concentric layer, so that the cable structure space can be effectively utilized, the cable function composite integration can be realized, and the cable structure size can be ensured to be compact.

[0089] In the above structure, the main insulated wire core is composed of a main conductor of a plurality of aluminum wires twisted together, a main insulating layer extruded outside the main conductor, and a main insulating protective layer extruded outside the main insulating layer. In order to facilitate wiring identification, the main insulating layer is an extruded structure of colored polyethylene material. The main insulating protective layer is an extruded structure of a transparent UV-resistant plastic compound with a thickness of about 0.20 mm, which enhances the aging resistance of the main insulating layer and facilitates intuitive identification of the main conductor covered by the main insulating layer.

[0090] In the above structure, the seven neutral cores are an integrally associated structure. Specifically, the neutral core has seven neutral conductors spaced side by side in the same insulation structure, and adjacent neutral conductors are separated by an insulation structure. Each neutral conductor is a single solid copper wire structure, and the diameter of the copper wire is determined by the current-carrying specification of the user-end power supply cable to be formed, and is not a specific value. The outside of each neutral conductor is extruded with a relatively independent neutral insulation layer with a polyethylene material extrusion structure. The outer contour of each neutral insulation layer is circular, and its thickness is about 0.38mm. Adjacent neutral insulation layers are transitioned by an integrally formed connecting rib, that is, the connecting rib is also an extruded structure of polyethylene material, and is extruded integrally with the neutral insulation layer, and the length of the connecting rib is about 0.35mm. Under the transition connection of the connecting rib, a matching gap of a concave structure is formed between the adjacent neutral insulation layers at both ends of the connecting rib, that is, the adjacent neutral insulation layers under the transition connection of the connecting rib are dumbbell-shaped. The neutral core of the above structure, when in the unfolded state, has a wavy I-shaped structure on the top and bottom sides in the transverse cross section, which is conducive to sparse winding and enhanced adhesion outside the main insulating core.

[0091] The two signal cores are independent structures. Each signal core is composed of a signal conductor and a signal insulation layer wrapped on the outside. The signal conductor adopts a single solid copper wire structure, and the signal insulation layer is an extruded structure of polyethylene material. In the above-mentioned concentric sparse winding structure, the two signal cores are placed on both sides of the overall associated neutral core, separating the neutral core from the five grounding cores. The signal insulation layers of the two signal cores can use different insulation colors to distinguish the positive and negative poles (for example, the signal insulation layer of one signal core is blue, and the signal insulation layer of the other signal core is white, etc.), forming a signal loop in the application.

[0092] The five grounding wire cores are independent structures. Each grounding wire core is composed of a single solid bare aluminum wire, which enhances the protection function of cable short-circuit grounding in application.

[0093] In the above-mentioned concentric sparse winding structure, in order to enhance the anti-slip adhesion with the main insulating core and the inner sheath layer, the outer surface of the insulation structure of the neutral core is set as a non-smooth friction-enhancing structure by roughening or grinding, the outer surface of the insulation structure of the signal core is set as a non-smooth friction-enhancing structure by roughening or grinding, and the outer surface of the grounding core is set as a non-smooth friction-enhancing structure by roughening or grinding. The roughness of the friction-enhancing structure of each core is about 45Ra. In the concentric sparse winding structure, the friction-enhancing inner outer surface of each core forms a friction contact with the insulation structure of the main insulating core, and the friction-enhancing outer surface of each core forms a friction contact with the inner sheath layer coated on the outside.

[0094] The inner sheath layer is an extruded structure of colored polyethylene material that is UV-proof, rat-proof and termite-proof. The thickness of the extrusion is about 1.7mm, ensuring that the cable has the characteristics of UV-proof, rat-proof and termite-proof.

[0095] The outer sheath layer is a transparent UV-proof plastic compound extruded structure with a thickness of about 0.20 mm, which enhances the weather resistance of the inner sheath layer.

[0096] In order to easily and efficiently strip the end wires during wiring, an open cable is pre-buried between the outside of the composite cable core and the adjacent inner sheath layer along the length of the cable core, that is, the open cable is arranged between the inner sheath layer and the cable core. The open cable is formed with a 2500D polyester yarn structure.

[0097] Example 6

[0098] The utility model is a user-side power supply cable with an open cable structure, which is composed of a cable core of a composite structure, and an inner sheath layer and an outer sheath layer that sequentially cover the outside of the cable core from the inside to the outside. The cable core of the composite structure is composed of a main insulating core, seven neutral cores, two signal cores and three grounding cores; the specific composite structure is that the seven neutral cores, two signal cores and three grounding cores are arranged on the outside of the main insulating core in a concentric sparse winding structure, and the sparse winding pitch is usually not greater than 10 times the outer diameter of the concentric layer, so that the cable structure space can be effectively utilized, the cable function composite integration can be realized, and the cable structure size can be ensured to be compact.

[0099] In the above structure, the main insulated wire core is composed of a main conductor of a single solid copper wire structure, a main insulation layer extruded outside the main conductor, and a main insulation protective layer extruded outside the main insulation layer. In order to facilitate wiring identification, the main insulation layer is an extruded structure of colored polyethylene material. The main insulation protective layer is a transparent UV-proof film wrapping structure with a thickness of about 0.25mm, which enhances the aging resistance of the main insulation layer and facilitates intuitive identification of the main conductor covered by the main insulation layer.

[0100] In the above structure, the seven neutral cores are independent of each other. Each neutral conductor is a single solid copper wire structure, and the diameter of the copper wire is determined by the current-carrying specification of the user-end power supply cable, which is not a specific value. The outside of each neutral conductor is extruded with a neutral insulation layer made of polyethylene material, and the thickness of the neutral insulation layer is about 0.30mm. In the wrapping structure, the seven independent neutral cores are closely adjacent to each other.

[0101] The two signal cores are independent structures. Each signal core is composed of a signal conductor and a signal insulation layer wrapped on the outside. The signal conductor adopts a single solid copper wire structure, and the signal insulation layer is an extruded structure of polyethylene material. In the above-mentioned concentric sparse winding structure, the two signal cores are placed on both sides of the adjacent neutral cores, separating the seven neutral cores from the three grounding cores. The signal insulation layers of the two signal cores can use different insulation colors to distinguish the positive and negative poles (for example, the signal insulation layer of one signal core is blue, and the signal insulation layer of the other signal core is white, etc.), forming a signal loop in the application.

[0102] The three grounding cores are independent structures. Each grounding core is composed of a single solid bare aluminum wire, which enhances the protection function of cable short-circuit grounding in application.

[0103] In the above-mentioned concentric sparse winding structure, in order to enhance the anti-slip adhesion with the main insulating core and the inner sheath layer, the outer surface of the insulation structure of the neutral core is set as a non-smooth friction-enhancing structure by roughening or grinding, the outer surface of the insulation structure of the signal core is set as a non-smooth friction-enhancing structure by roughening or grinding, and the outer surface of the grounding core is set as a non-smooth friction-enhancing structure by roughening or grinding. The roughness of the friction-enhancing structure of each core is about 35Ra. In the concentric sparse winding structure, the friction-enhancing inner outer surface of each core forms a friction contact with the insulation structure of the main insulating core, and the friction-enhancing outer surface of each core forms a friction contact with the inner sheath layer coated on the outside.

[0104] The inner sheath layer is an extruded structure of colored polyethylene material that is UV-proof, rat-proof and termite-proof, with a basic thickness of about 1.4mm, ensuring that the cable has the properties of UV-proof, rat-proof and termite-proof.

[0105] The outer sheath layer is a transparent UV-proof plastic compound extruded structure with a thickness of about 0.25 mm, which enhances the weather resistance of the inner sheath layer.

[0106] In order to easily and efficiently strip the end wires during wiring, an open cable is pre-buried between the outside of the composite cable core and the adjacent inner sheath layer along the length of the cable core, that is, the open cable is arranged between the inner sheath layer and the cable core. The open cable is formed by a 5000D polyester yarn structure.

[0107] The above embodiments are only used to illustrate the present invention, but not to limit it.

[0108] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the above embodiments or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not deviate the essence of the corresponding technical solutions from the spirit and scope of the present invention.

Claims

1. A strippable user-end power supply cable, characterized in that: The cable comprises a cable core composed of at least one main insulated core (1), at least one neutral core (2), at least one signal core (3) and at least one grounding core (4), and the outside of the cable core is coated with at least one sheath layer; At least one open cable (5) is pre-buried between the cable core and the adjacent sheath layer along the length direction of the cable core; The cable core is coated with two sheath layers from the inside to the outside, the inner sheath layer (6) is an extruded structure of a colored polyethylene material, and the outer sheath layer (7) is an extruded structure of a transparent UV-proof plastic compound or a UV-proof film wrapped structure; The open cable (5) is arranged between the inner sheath layer (6) and the cable core.

2. The strippable user-end power supply cable according to claim 1, characterized in that: The cable (5) is a nylon rope structure with a diameter of 0.5 to 1 mm or a polyester yarn structure with a diameter of 2500 to 5000D.

3. The strippable user-end power supply cable according to claim 1, characterized in that: The cable core is composed of a main insulating core (1), a plurality of neutral cores (2), a plurality of signal cores (3) and a plurality of grounding cores (4), and the plurality of neutral cores (2), the plurality of signal cores (3) and the plurality of grounding cores (4) are arranged outside the main insulating core (1) in a sparsely wound concentric structure.

4. The strippable user-end power supply cable according to claim 3, characterized in that: In the concentric sparse winding structure, the signal wire core (3) is disposed at both side edges of the neutral wire core (2), so as to separate the neutral wire core (2) from the ground wire core (4).

5. The strippable user-end power supply cable according to claim 3 or 4, characterized in that: The outer surfaces of the neutral wire core (2), the signal wire core (3) and / or the ground wire core (4) are non-smooth friction-increasing structures; The roughness of the friction-increasing structure is 25 to 50 Ra; Correspondingly, the inner outer surfaces of the neutral core (2), the signal core (3) and / or the ground core (4) form a frictional contact fit with the main insulating core (1), and the outer outer surfaces of the neutral core (2), the signal core (3) and / or the ground core (4) form a frictional contact fit with the inner sheath layer (6).

6. The strippable user-end power supply cable according to claim 1, 3 or 4, characterized in that: The neutral line core (2) has 6 to 9 neutral conductors (21) arranged side by side at intervals, each neutral conductor (21) being a single solid copper wire structure; each neutral conductor (21) is extruded with a relatively independent neutral insulation layer (22) made of polyethylene material on the outside, and adjacent neutral insulation layers (22) are connected by integrally formed connecting ribs (23), and each neutral conductor (21) is formed in the same insulation structure with an interval and side by side structure; When the neutral line core (2) is in an unfolded state, the transverse cross section presents a straight-line structure with wavy top and bottom sides.

7. The strippable user-end power supply cable according to claim 1, 3 or 4, characterized in that: The signal wire core (3) is composed of a signal conductor (31) and a signal insulation layer (32) extruded outside the signal conductor (31); The signal conductor (31) is a single solid copper wire structure; The signal insulation layer (32) is an extruded structure of polyethylene material.

8. The strippable user-end power supply cable according to claim 1 or 3, characterized in that: The main insulated wire core (1) is composed of a main conductor (11), a main insulating layer (12) and a main insulating protective layer (13) which are arranged in sequence from the inside to the outside; The main conductor (11) is any one of a structure of twisted copper wires, a single solid copper wire, a structure of twisted aluminum wires, a single solid aluminum wire, a structure of twisted copper wires with a reinforcing core, or a structure of twisted aluminum wires with a reinforcing core; The main insulating layer (12) is an extruded structure of a colored polyethylene material; The main insulating protective layer (13) is a transparent UV-proof plastic compound extruded structure or a UV-proof film wrapped structure.

9. The strippable user-end power supply cable according to claim 1 or 3, characterized in that: The grounding wire core (4) is a single solid bare copper wire structure or a single solid bare aluminum wire structure.

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