Composite low voltage power cable

Abstract

The application provides a composite low-voltage power cable, and belongs to the technical field of cables.The composite low-voltage power cable comprises an outer shell and a copper strip.Five groups of isolation sleeves are fixed together by a connecting block to ensure stable connection between the isolation sleeves and the copper strip, prevent displacement under external pressure, ensure stability of the copper strip, avoid circuit failure, and support columns are arranged at the centers of the isolation sleeves to provide support force, maintain stability of the isolation sleeves, prevent deformation or loosening, improve stability of the cable under high pressure or bending, spiral blades are clamped in 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, prevent deformation caused by external pressure, and the combination of the support columns, the spiral blades and the isolation sleeves improves mechanical stability of the cable, which can withstand greater external impact or tension and ensure stable operation of the cable under high load.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable, in particular to a composite low-voltage power cable. BACKGROUND

[0002] The composite low-voltage power cable is widely used in power transmission systems in residential, commercial and industrial buildings, and these cables are usually composed of conductors, insulation layers, sheath layers and the like. With the increase of power demand and the complication of cable use environment, the traditional power cable has some shortcomings in mechanical properties, durability, and resistance to external force impact. In low-voltage power cables, especially in buried and easily affected by external force application environment, the mechanical protection of the cable is crucial. At present, although there are many technologies to enhance the mechanical properties of the cable, such as using stronger sheath materials or adding steel wire reinforcing layer in the cable, these measures still have some limitations, for example, the elasticity and tensile strength of the sheath layer are often difficult to meet the requirements of different environments at the same time, and the flexibility and shear resistance of the cable are often not effectively considered.

[0003] In the traditional low-voltage power cable, the mechanical properties of the cable usually depend on the design of the outer sheath and the protective layer. However, the cable often suffers from external compression or tension during installation, transportation or use, which can easily cause 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 still have problems of being easily compressed and torn by external forces.

[0004] In view of this, the present application provides a composite low-voltage power cable to solve the above problems. SUMMARY

[0005] In order to solve the problem that in the traditional low-voltage power cable, the mechanical properties of the cable mainly depend on the design of the outer sheath and the protective layer, however, during the installation, transportation or use of the cable, the cable often encounters external compression, tension or other mechanical stress, which leads to damage to the cable structure and affects its long-term reliability and safety. Although the existing power cable usually uses a single protective layer or reinforcing material to improve its compression and tension resistance, these measures are still insufficient when facing external compression, tearing or other extreme conditions, resulting in the technical problem that the cable is easily damaged or its performance is reduced in some cases. The present application provides a composite low-voltage power cable.

[0006] The technical scheme provided by the embodiment of the present application is as follows:

[0007] The composite low-voltage power cable provided by the embodiment of the present application comprises: an outer shell and a copper strip.

[0008] The copper strip is inserted into the inner part of the outer shell.

[0009] Further comprising:

[0010] A filling assembly is inserted into the interior of the shell, and the filling assembly is used for the connecting piece between the shell and the copper bar;

[0011] A support is inserted into the interior of the shell, and the support is located in the interior of the filling assembly;

[0012] The support comprises a support column and a spiral blade, and the support column is inserted into the interior of the shell and the filling assembly, and the outer side of the support column is fixedly installed with the spiral blade;

[0013] A connecting unit is sleeved on the outer side of the copper bar, and the connecting unit is located in the interior of the shell and the filling assembly;

[0014] The connecting unit comprises an isolation sleeve and a connecting block, the isolation sleeve is sleeved on the outer side of the copper bar, and the interior of the isolation sleeve is inserted with the connecting block;

[0015] The outer side of the isolation sleeve is provided with a clamping groove, 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 clamping groove.

[0016] The technical scheme provided by the embodiment of the present application has at least the following beneficial effects:

[0017] In the present application, the connecting block is used to fix the five isolation sleeves together, to ensure the stable connection between the isolation sleeve and the copper bar, to prevent displacement under external pressure, to ensure the stability of the copper bar, to avoid circuit failure, and to support the support column in the center of the isolation sleeve, to provide support force, to maintain the stability of the isolation sleeve, to prevent deformation or loosening, to improve the stability of the cable under high pressure or bending, to clasp the spiral blade in the isolation sleeve, to promote air circulation, to improve the heat dissipation performance, to reduce heat accumulation, to reduce the risk of cable failure, and to help the spiral blade to maintain the shape of the isolation sleeve, to prevent deformation caused by external pressure. The combination of the support column, the spiral blade and the isolation sleeve improves the mechanical stability of the cable, which can withstand a large external impact or tension, and ensures the stable operation of the cable in a high load environment. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1This is a front view schematic diagram of a composite low-voltage power cable provided in an embodiment of the present invention.

[0020] 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.

[0021] Figure 3 A composite low-voltage power cable provided in an embodiment of the present invention Figure 1 A schematic diagram of the structure exploded.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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

[0028] 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.

[0029] It is to be noted that the terms "one embodiment," "an embodiment," "some embodiments," "one specific embodiment," or "some specific embodiments" as may be used herein are thus meant to be read as "at least one embodiment" or "one or more embodiments" and not as a specific limitation on the number of embodiments. The specific features, structures, or characteristics described in one or more embodiments are for clarification only and are not necessarily encompassed by every embodiment. Further, it should be appreciated that features described in relation to one embodiment can be incorporated into all embodiments, whether or not they were specifically described as being incorporated.

[0030] Generally, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. For example, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Expressions such as "at least one of," when preceding a list of two or more items, denote that at least one of the listed items is present and additionally one or more of the listed items can be present.

[0031] It will be understood that the terms "on," "over," and "above," used in the present disclosure, should be interpreted in the broadest context possible so that "on" not only means "directly on" something but also includes the meaning of being "on" something with intervening features or layers therebetween, and "over" or "above" not only means "over" or "above" something but also can include the meaning of being "over" or "above" something with no intervening features or layers therebetween.

[0032] In addition, spatially relative terms, such as "under", "below", "lower", "over", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein can likewise be interpreted accordingly.

[0033] As shown in FIG. 1, an embodiment of the present application provides a composite low-voltage power cable 1, comprising: an outer shell 110 and a copper strip 120, the copper strip 120 being inserted inside the outer shell 110; Figures 1 to 7 A filling assembly 2 is inserted inside the outer shell 110, the filling assembly 2 being used for the connection between the outer shell 110 and the copper strip 120;

[0034]

[0035] ​A support 3 is inserted in the inside of the shell 110 and is located in the inside of the filling assembly 2;

[0036] The support 3 comprises a support column 310 and a spiral blade 320, the support column 310 is inserted in the inside of the shell 110 and the filling assembly 2, and the outer side of the support column 310 is fixedly installed with the spiral blade 320;

[0037] A connecting unit 4 is sleeved on the outer side of the copper strip 120, and is located in the inside of the shell 110 and the filling assembly 2;

[0038] The connecting unit 4 comprises an isolation sleeve 410 and a connecting block 420, the isolation sleeve 410 is sleeved on the outer side of the copper strip 120, and the connecting block 420 is inserted in the inside of the isolation sleeve 410;

[0039] The outer side of the isolation sleeve 410 is provided with a clamping groove 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 clamping groove 5.

[0040] The copper strip 120 and the isolation sleeve 410 are provided with five groups, the five groups of the copper strip 120 and the isolation sleeve 410 are distributed in an array mode around the central axis of the support column 310, the five groups of the isolation sleeve 410 are connected through an adhesive, the section of the connecting block 420 is in a “U” shape structure, the inside of the isolation sleeve 410 is provided with a groove matched with one half of the connecting block 420, the connecting block 420 is used for connecting two groups of the isolation sleeve 410 in the five groups of the isolation sleeve 410, the support column 310 is located at the outer side of the five groups of the isolation sleeve 410, and the outer side of the five groups of the isolation sleeve 410 is provided with the clamping groove 5 matched with the spiral blade 320.

[0041] It should be noted that the design of the connecting block 420 and the card slot 5 allows the five groups of isolation sleeves 410 to be fixed together, enhancing the structural stability between the isolation sleeves 410 and the copper bars 120. Through this connection method, the isolation sleeves 410 are less likely to displace under external pressure, thereby ensuring that the copper bars 120 inside the shell 110 can always maintain a certain fixed relationship, avoiding circuit failure caused by movement or extrusion. The support column 310 is located at the center surrounded by the five groups of isolation sleeves 410, acting as a support structure to ensure the stability of the shape and relative position of the five groups of isolation sleeves 410. This design effectively enhances the overall mechanical properties of the cable 1, avoiding the deformation or loosening of the five groups of copper bars 120. Through the support force of the support column 310, the stability of the cable 1 under high pressure or bending can be improved, reducing the risk of displacement of the copper bars 120 under external pressure. The spiral blade 320 ensures that the five groups of isolation sleeves 410 maintain consistent shapes by engaging with the inside of the isolation sleeves 410, preventing deformation when the cable 1 is subjected to mechanical pressure externally. This structure not only improves the anti-external force performance of the cable 1, but also ensures the fixation between the five groups of isolation sleeves 410, allowing the arrangement of the copper bars 120 to remain stable. This combination of the spiral blade 320 and the support column 310 improves the mechanical stability of the cable 1 and can withstand greater external impact force or tension. In addition, the combination of the heat dissipation function of the spiral blade 320 and the support force of the isolation sleeve 410 makes the cable 1 not only more structurally stable, but also has good temperature resistance and long-term operation capability. Through the combination of multiple structures, the cable 1 maintains a stable shape under various physical actions such as stretching, compression, and bending. The mutual cooperation of the support column 310, the spiral blade 320, and the isolation sleeve 410 effectively shares external loads, avoiding displacement or damage to the copper bars 120 and the cable 1 body, ensuring stable operation of the cable 1 in high-load working environments.

[0042] Further, the filling assembly 2 comprises a rubber sleeve 210, the rubber sleeve 210 is inserted into the inside of the shell 110, the inside of the rubber sleeve 210 is inserted with a metal mesh sleeve 220, the inside of the shell 110 is inlaid with an elastic fastening unit 230, the elastic fastening unit 230 comprises ethylene-propylene rubber 231 and glass fiber 232, the ethylene-propylene rubber 231 and the glass fiber 232 are uniformly inlaid in the inside of the shell 110, the outer wall of the rubber sleeve 210 is in contact with the inner wall of the shell 110, the inner wall of the rubber sleeve 210 is in contact with the outer wall of the metal mesh sleeve 220, the inner wall of the metal mesh sleeve 220 is in contact with the outer wall of the isolation sleeve 410, the inside of the rubber sleeve 210 is equidistantly provided with holes, the transverse section of the hole is a honeycomb structure, the outer side of the metal mesh sleeve 220 is uniformly coated with epoxy resin, because the epoxy resin has excellent adhesion, the metal mesh sleeve 220 is prevented from being oxidized, the ethylene-propylene rubber 231 and the glass fiber 232 are in staggered weaving state, 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.

[0043] It should be noted that by sleeving the copper bars 120 with isolation sleeves 410 on the outside, the copper bars 120 are effectively protected from external physical damage or corrosion. The isolation sleeves 410 not only ensure the electrical conductivity of the copper bars 120, but also provide protection. The metal mesh sleeve 220 provides additional mechanical protection for the copper bars 120, enhancing the stability and compression resistance of the structure, effectively dispersing external pressure, reducing the risk of damage to the cable 1 during transportation or installation under external force, and absorbing and relieving external impact. The elasticity of the rubber sleeve 210 can effectively disperse pressure and prevent internal components of the cable 1 from being damaged by external impact. At the same time, the rubber sleeve 210 itself has strong anti-aging and corrosion resistance, which improves 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 corrosion factors, improving the waterproof performance of the cable 1 in harsh environments. The alternating design of the ethylene-propylene rubber 231 and the glass fiber 232 effectively improves the wear resistance and compression resistance of the cable 1. The ethylene-propylene rubber 231 has good weather resistance, chemical resistance, and insulation, while the high-strength and rigid glass fiber 232 enhances the structural stability of the cable 1. This alternating design not only improves the tensile strength of the cable 1, but also increases the mechanical impact resistance of the cable 1. The combination of ethylene-propylene rubber 231 and glass fiber 232 allows the cable 1 to maintain good performance in high-temperature, low-temperature, and humid environments, extending the service life of the cable 1. Through multi-level protection design, from the copper bars 120 to the external rubber sleeve 210, and then to the ethylene-propylene rubber 231 and glass fiber 232 inside the cable 1, the entire cable 1 has strong compression, tensile, shock, and wear resistance. This multi-level structure not only increases the safety of the cable 1, but also reduces the risk of performance degradation of the cable 1 due to changes in external environment.

[0044] The composite low-voltage power cable designed by the present application not only retains the normal working state of the existing power cable, but also improves the design of the structure and layout of the power cable. The support and connecting block of the isolation sleeve are embedded in the clamping groove inside the isolation sleeve, which effectively reduces the stress concentration of the cable during bending and stretching, thereby improving the service life of the cable and greatly improving the stability and flexibility of the traditional power cable during installation. It is expected to further promote the development and application of power cables.

[0045] The technical solutions provided by the embodiments of the present application have at least the following beneficial effects:

[0046] In the application, the power cable is composed of a rubber sleeve, a metal mesh sleeve and an elastic fastening unit, the elastic fastening unit is composed of ethylene-propylene rubber and glass fiber, in the process of installing the shell and copper strip, in the case of cable installation bending, the elasticity and tear resistance of the elastic fastening unit as a whole are improved through the elastic support of ethylene-propylene rubber and the tear resistance of glass fiber, thereby the toughness of the shell bending is improved, the honeycomb of the rubber sleeve is used to absorb the heat emitted by the copper strip during work, thereby the service life of the copper strip is improved, the five groups of isolation sleeves are stably installed together through the support of the metal mesh sleeve and the connection block, and the stability and flexibility of the power cable during installation and work are greatly improved.

[0047] The present application encompasses any substitutions, modifications, equivalent methods and solutions made on the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the preferred embodiments of the present application, and the present application can also be fully understood without the description of these details to those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0048] The above is only the preferred embodiment of the present application, it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can also be made, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A composite low-voltage power cable, characterized in that, include: Casing 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.

2. The composite low-voltage power cable according to claim 1, characterized in that: There are five sets of copper bars and isolation sleeves, which are arranged 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 sets of isolation sleeves are connected by adhesive. The cross-section of the connecting block is U-shaped. The interior of the isolation sleeve has a groove that matches half of the connecting block. The connecting block is used to connect two sets of the five sets of isolation sleeves.

4. The composite low-voltage power cable according to claim 1, characterized in that: The support column is located on the outside of the five sets of isolation sleeves, and the outside of the five sets of isolation sleeves is provided with a slot adapted to the spiral blade.

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

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

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

8. The composite low-voltage power cable according to claim 5, characterized in that: The rubber sleeve has holes spaced at equal intervals inside, and the cross-section of the holes 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. Due to the excellent adhesion of epoxy resin, the oxidation of the metal mesh sleeve is prevented.

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

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