Composite low-voltage power cable

Abstract

The invention provides a composite low-voltage power cable, and belongs to the technical field of cables, and the composite low-voltage power cable comprises a housing and a copper bar. The five sets of spacer sleeves are fixed together through the connecting blocks, stable connection between the spacer sleeves and the copper bars is ensured, displacement under external pressure is prevented, the copper bars are kept stable, circuit faults are avoided, the supporting columns are located in the centers of the spacer sleeves in a supporting mode, supporting force is provided, the stability of the spacer sleeves is kept, and deformation or loosening is prevented. The spiral blades are clamped in the isolation sleeve, air circulation is promoted, heat dissipation performance is improved, heat accumulation is reduced, the cable fault risk is reduced, the spiral blades help to maintain the shape of the isolation sleeve, deformation caused by external pressure is prevented, and the service life of the cable is prolonged. The combination of the support column, the spiral blade and the isolation sleeve improves the mechanical stability of the cable, can bear large external impact or pulling force, and guarantees the stable operation of the cable in a high-load environment.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a composite low-voltage power cable. Background Technology

[0002] Composite low-voltage power cables are widely used in power transmission systems in residential, commercial, and industrial buildings. These cables typically consist of a conductor, insulation layer, and sheath layer. With increasing power demand and more complex cable usage environments, traditional power cables have revealed certain deficiencies in mechanical performance, durability, and resistance to external impacts. In low-voltage power cables, especially in buried applications and environments susceptible to external forces, mechanical protection is crucial. Currently, although there are many technologies to enhance cable mechanical performance, such as using stronger sheath materials or adding steel wire reinforcement layers to the cable, these measures still have some limitations. For example, the elasticity and tensile strength of the sheath layer often cannot simultaneously meet the requirements of different environments, and the flexibility and shear resistance of the cable often cannot be effectively balanced.

[0003] In traditional low-voltage power cables, the mechanical properties of the cable usually depend on the design of the outer sheath and protective layer. However, the cable is often subjected to external pressure or tension during installation, transportation or use, which can easily lead to damage to the cable structure and affect its long-term reliability. In order to solve this problem, most existing power cables use a single protective layer or reinforcing material, but they are still susceptible to external pressure and tearing.

[0004] In view of this, the present invention proposes a composite low-voltage power cable to solve the above problems. Summary of the Invention

[0005] To address the issue that in existing traditional low-voltage power cables, the mechanical performance of the cable mainly depends on the design of the outer sheath and protective layer. However, during the installation, transportation, or use of the cable, it often encounters external pressure, tension, or other mechanical stresses, which can damage the cable structure and affect its long-term reliability and safety. Although existing power cables typically use a single protective layer or reinforcing material to improve their compressive and tensile strength, these measures are still insufficient when faced with external pressure, tearing, or other extreme conditions, leading to technical problems such as easy damage or performance degradation in certain situations. This invention provides a composite low-voltage power cable.

[0006] The technical solutions provided by the embodiments of the present invention are as follows: This invention provides a composite low-voltage power cable, comprising: a shell and copper strips; Copper strips are inserted inside the outer casing; Also includes: A filling assembly, which is inserted inside the housing and serves as a connector between the housing and the copper strip; A support member, which is inserted inside the housing and located inside the filling assembly; The support includes a support column and a helical blade, with the support column inserted inside the housing and filling assembly, and the helical blade fixedly installed on the outside of the support column. A connecting unit, which is sleeved on the outside of the copper strip and located inside the housing and filling assembly; The connecting unit includes an isolation sleeve and a connecting block. The isolation sleeve is fitted over the outside of the copper strip, and the connecting block is inserted inside the isolation sleeve. The outer side of the isolation sleeve is provided with a slot, the outer side of the isolation sleeve abuts against the outer side of the support column, and the outer side of the spiral blade abuts against the inner wall of the slot.

[0007] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: In this invention, connecting blocks are used to fix five sets of isolation sleeves together, ensuring a stable connection between the isolation sleeves and the copper strips, preventing displacement under external pressure, ensuring the stability of the copper strips, avoiding circuit failures, and supporting columns located at the center of the isolation sleeves to provide support force, maintain the stability of the isolation sleeves, prevent deformation or loosening, and improve the stability of the cable under high voltage or bending. The spiral blades are engaged inside the isolation sleeves to promote air circulation, improve heat dissipation performance, reduce heat accumulation, and reduce the risk of cable failure. The spiral blades also help maintain the shape of the isolation sleeves and prevent deformation caused by external pressure. The combination of the supporting columns, spiral blades, and isolation sleeves improves the mechanical stability of the cable, enabling it to withstand greater external impacts or tension, and ensuring stable operation of the cable under high load conditions. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a front view schematic diagram of a composite low-voltage power cable provided in an embodiment of the present invention.

[0010] Figure 2 This is a three-dimensional cross-sectional view of the outer shell and elastic fastening unit of a composite low-voltage power cable provided in an embodiment of the present invention.

[0011] Figure 3A composite low-voltage power cable provided in an embodiment of the present invention Figure 1 A schematic diagram of the structure exploded.

[0012] Figure 4 A composite low-voltage power cable provided in an embodiment of the present invention Figure 1 A three-dimensional schematic diagram of a partial cross-section of the structure.

[0013] Figure 5 This is an exploded three-dimensional structural diagram of the copper strip and support column of a composite low-voltage power cable provided in an embodiment of the present invention.

[0014] Figure 6 This is an exploded three-dimensional schematic diagram from another perspective of the structure of the copper strip and support column of a composite low-voltage power cable provided in an embodiment of the present invention.

[0015] Figure 7 A composite low-voltage power cable provided in an embodiment of the present invention Figure 1 An enlarged schematic diagram of structure A in the middle.

[0016] Reference numerals: 1. Cable; 110. Outer shell; 120. Copper strip; 2. Filler assembly; 210. Rubber sleeve; 220. Metal mesh sleeve; 230. Elastic fastening unit; 231. Ethylene propylene rubber; 232. Glass fiber; 3. Support component; 310. Support column; 320. Helical blade; 4. Connecting unit; 410. Isolation sleeve; 420. Connecting block; 5. Slot.

[0017] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0018] The technical solutions of the present invention will now be described with reference to the accompanying drawings. It should also be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also use other alternative methods to implement the invention; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0019] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0020] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0021] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0022] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0023] like Figures 1 to 7 As shown, an embodiment of the present invention provides a composite low-voltage power cable 1, comprising: a shell 110 and a copper strip 120, wherein the copper strip 120 is inserted inside the shell 110; Filling component 2, which is inserted inside the housing 110, and serves as a connector between the housing 110 and the copper strip 120; Support member 3 is inserted inside the housing 110 and is located inside the filling assembly 2; The support member 3 includes a support column 310 and a helical blade 320. The support column 310 is inserted into the interior of the outer shell 110 and the filling assembly 2. The helical blade 320 is fixedly installed on the outer side of the support column 310. Connecting unit 4, which is sleeved on the outside of the copper strip 120, and located inside the outer shell 110 and the filling component 2; The connecting unit 4 includes an isolation sleeve 410 and a connecting block 420. The isolation sleeve 410 is sleeved on the outside of the copper strip 120, and the connecting block 420 is inserted inside the isolation sleeve 410. The outer side of the isolation sleeve 410 is provided with a slot 5, the outer side of the isolation sleeve 410 abuts against the outer side of the support column 310, and the outer side of the spiral blade 320 abuts against the inner wall of the slot 5.

[0024] Five sets of copper strips 120 and isolation sleeves 410 are provided. The five sets of copper strips 120 and isolation sleeves 410 are arranged in an array around the central axis of the support column 310. The five sets of isolation sleeves 410 are connected by adhesive. The cross-section of the connecting block 420 is U-shaped. The interior of the isolation sleeve 410 has a groove that matches half of the connecting block 420. The connecting block 420 is used to connect two sets of isolation sleeves 410. The support column 310 is located on the outside of the five sets of isolation sleeves 410. The outside of the five sets of isolation sleeves 410 has a slot 5 that matches the spiral blade 320.

[0025] It should be noted that the design of the connecting block 420 and the slot 5 fixes the five sets of isolation sleeves 410 together, enhancing the structural stability between the isolation sleeves 410 and the copper strips 120. Through this connection method, the isolation sleeves 410 are less prone to displacement under external pressure, thus ensuring that the copper strips 120 inside the outer shell 110 always maintain a certain fixed relationship, avoiding circuit failures caused by movement or compression. The support column 310 is located at the center of the five sets of isolation sleeves 410, acting as a support structure to ensure the stability of the shape and relative position of the five sets of isolation sleeves 410. This design effectively enhances the overall mechanical properties of the cable 1, preventing deformation or loosening of the five sets of copper strips 120. The supporting force of the support column 310 improves the stability of the cable 1 under high voltage or bending conditions, reducing the risk of displacement of the copper strips 120 under external pressure. The spiral blade 320, through its engagement with the inside of the isolation sleeves 410, ensures that the five sets of isolation sleeves 410 are securely fixed. Maintaining a consistent shape prevents deformation when subjected to mechanical pressure. This structure not only improves the cable's resistance to external forces but also ensures the fixation between the five sets of isolation sleeves 410, keeping the arrangement of the copper bars 120 stable. This combination of spiral blades 320 and support columns 310 enhances the mechanical stability of the cable and enables it to withstand greater external impact or tension. Furthermore, the combination of the heat dissipation function of the spiral blades 320 and the support force of the isolation sleeves 410 makes the cable not only more structurally stable but also provides good temperature resistance and long-term operation capability. Through this combination of multiple structures, the cable maintains a stable shape under various physical forces such as tension, compression, and bending. The cooperation between the support columns 310, spiral blades 320, and isolation sleeves 410 effectively distributes the external load, preventing displacement or damage to the copper bars 120 and the cable body, and ensuring the stable operation of the cable in high-load working environments.

[0026] Further, the filling component 2 includes a rubber sleeve 210, which is inserted inside the outer shell 110. A metal mesh sleeve 220 is inserted inside the rubber sleeve 210. An elastic fastening unit 230 is embedded inside the outer shell 110. The elastic fastening unit 230 includes ethylene propylene rubber 231 and glass fiber 232, which are evenly embedded inside the outer shell 110. The outer wall of the rubber sleeve 210 abuts against the inner wall of the outer shell 110, and the inner wall of the rubber sleeve 210 abuts against the metal mesh sleeve 220. The outer walls of the metal mesh sleeve 220 abut against each other, and the inner wall of the metal mesh sleeve 220 abuts against the outer wall of the isolation sleeve 410. The rubber sleeve 210 has holes evenly spaced inside, and the cross-section of the holes has a honeycomb structure. The outer side of the metal mesh sleeve 220 is uniformly coated with epoxy resin. Due to the excellent adhesion of epoxy resin, oxidation of the metal mesh sleeve 220 is avoided. The ethylene propylene rubber 231 and glass fiber 232 are interwoven. The ethylene propylene rubber 231 provides elastic support for the elastic fastening unit 230, and the glass fiber 232 provides tear resistance for the elastic fastening unit 230.

[0027] It should be noted that by covering the copper strip 120 with isolation sleeves 410, external physical damage or corrosion to the copper strip 120 is effectively prevented. The isolation sleeves 410 ensure the electrical conductivity of the copper strip 120 while also providing protection. The metal mesh sleeve 220 provides additional mechanical protection for the copper strip 120, enhancing structural stability and compressive strength, and effectively dispersing external pressure, reducing the risk of damage to the cable 1 during transportation or installation. The rubber sleeve 210, installed outside the metal mesh sleeve 220, absorbs and mitigates external impacts. The elasticity of the rubber sleeve 210 effectively disperses pressure, preventing damage to the internal components of the cable 1 from external impacts. Simultaneously, the rubber sleeve 210 itself possesses strong anti-aging and corrosion resistance, extending the service life of the cable 1. This design ensures that the cable 1 effectively resists external environmental damage, such as moisture, humidity, and other corrosive factors, thus improving the cable 1's lifespan. In harsh environments, the interwoven design of EPDM rubber 231 and glass fiber 232 effectively enhances the abrasion resistance and compressive strength of cable 1. EPDM rubber 231 has excellent weather resistance, chemical resistance, and insulation properties, while the high strength and rigidity of glass fiber 232 enhance the structural stability of cable 1. This interwoven design not only improves the tensile strength of cable 1 but also increases its resistance to mechanical impact. The combination of EPDM rubber 231 and glass fiber 232 allows cable 1 to maintain good performance in high-temperature, low-temperature, and humid environments, extending its service life. Through a multi-layered protective design, from the copper strip 120 to the outer rubber sheath 210, and then to the EPDM rubber 231 and glass fiber 232 inside cable 1, the entire cable 1 possesses extremely strong compressive, tensile, shock, and abrasion resistance. This multi-layered structure not only increases the safety of cable 1 but also reduces the risk of performance degradation caused by changes in the external environment.

[0028] This invention presents a composite low-voltage power cable that retains the normal operating condition of existing power cables while improving the structural layout design. The support and connecting block of the isolation sleeve are fitted into the slots opened inside the isolation sleeve, which effectively reduces stress concentration during bending and stretching, thereby increasing the service life of the cable. It greatly enhances the stability and flexibility of traditional power cables during installation and is expected to further promote the development and application of power cables.

[0029] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: In this invention, a power cable is used, and the filling assembly consists of a rubber sheath, a metal mesh sheath, and an elastic fastening unit. The elastic fastening unit is composed of ethylene propylene rubber and glass fiber. During the installation of the outer shell and copper strips, when the cable is bent, the elastic support of the ethylene propylene rubber and the tear resistance of the glass fiber improve the overall elasticity and tear resistance of the elastic fastening unit, thereby enhancing the bending toughness of the outer shell. The honeycomb structure of the rubber sheath helps to absorb the heat emitted by the copper strips during operation, thereby increasing the service life of the copper strips. The reinforcement and support of the metal mesh sheath ensure that the five sets of isolation sleeves are stably installed together by the connecting blocks, greatly improving the stability and flexibility of the power cable during installation and operation.

[0030] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0031] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A composite low voltage power cable, characterized in that The utility model relates to a copper strip filling device, including: A shell and a copper strip; The copper strip is inserted in the interior of the shell; Further including: A filling assembly inserted in the interior of the shell, which is used for the connection between the shell and the copper strip; A support inserted in the interior of the shell and located in the interior of the filling assembly; The support includes a support column and a spiral blade, and the support column is inserted in the interior of the shell and the filling assembly, and the outer side of the support column is fixedly installed with the spiral blade; A connecting unit sleeved on the outer side of the copper strip and located in the interior of the shell and the filling assembly; The connecting unit includes an isolation sleeve and a connecting block, the isolation sleeve is sleeved on the outer side of the copper strip, and the connecting block is inserted in the interior of the isolation sleeve; The outer side of the isolation sleeve is provided with a clamping groove, the outer side of the isolation sleeve is in contact with the outer side of the support column, and the outer side of the spiral blade is in contact with the inner wall of the clamping groove.

2. The composite low voltage power cable according to claim 1, characterized in that: The copper strip and the isolation sleeve are provided with five groups, and the five groups of copper strips and isolation sleeves are distributed in an array around the central axis of the support column.

3. The composite low voltage power cable according to claim 1, characterized in that: The five groups of isolation sleeves are connected by an adhesive, the connecting block has a "U" shaped structure, the interior of the isolation sleeve is provided with a groove matched with half of the connecting block, and the connecting block is used for connecting two of the five groups of isolation sleeves.

4. The composite low voltage power cable according to claim 1, characterized in that: The support column is located at the outer side of the five groups of isolation sleeves, and the outer side of the five groups of isolation sleeves is provided with a clamping groove matched with the spiral blade.

5. The composite low voltage power cable according to claim 1, characterized in that: The filling assembly includes a rubber sleeve inserted in the interior of the shell, a metal mesh sleeve inserted in the interior of the rubber sleeve, and an elastic fastening unit embedded in the interior of the shell.

6. The composite low voltage power cable according to claim 5, characterized in that: The elastic fastening unit includes ethylene-propylene rubber and glass fiber, and the ethylene-propylene rubber and the glass fiber are uniformly embedded in the interior of the shell.

7. The composite low voltage power cable according to claim 5, characterized in that: The outer wall of the rubber sleeve is in contact with the inner wall of the shell, the inner wall of the rubber sleeve is in contact with the outer wall of the metal mesh sleeve, and the inner wall of the metal mesh sleeve is in contact with the outer wall of the isolation sleeve.

8. The composite low voltage power cable according to claim 5, characterized in that: The interior of the rubber sleeve is provided with equidistant holes, and the transverse section of the hole has a honeycomb structure.

9. The composite low voltage power cable according to claim 5, characterized in that: The outer side of the metal mesh sleeve is uniformly coated with epoxy resin, which has excellent adhesion and avoids oxidation of the metal mesh sleeve.

10. The composite low voltage power cable according to claim 6, characterized in that: The ethylene-propylene rubber and the glass fiber are in an interlaced woven state, the ethylene-propylene rubber provides elastic support for the elastic fastening unit, and the glass fiber provides tear resistance for the elastic fastening unit.

Images