A low-voltage power cable with breakage prevention

Abstract

The utility model discloses a low -voltage power cable of preventing breaking, which sets up the skin through setting up the skin outside the electric core, and the two slip rings of slidable are set up on the skin, and the spring is connected between the slip rings, and the pre -tightening assembly and the mounting block are connected respectively at both ends of the spring, and the mounting block is detachably connected with the pre -tightening assembly through the connecting cable. When the cable is bent, the slip ring drives the spring to move, and the spring guides the hollow electric core bending, preventing the wire from breaking. Rotating the nut to push the sliding cylinder, the top ball is fixedly connected with the cable, realizing the cable bending fixation, which can also replace the power hardware to reduce the cost. The connecting cable is a plurality of steel cables, which enhances the tensile support. The cable effectively solves the problems of easy breaking, inconvenient bending fixation and high cost of low-voltage power cable in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of power transmission technology, and in particular to a low-voltage power cable that is resistant to breakage. Background Technology

[0002] In modern power systems, low-voltage power cables are key components for transmitting and distributing electrical energy, and are widely used in urban underground power grids, power plant lead-out lines, and internal power supply in industrial and mining enterprises. With the continuous growth of electricity demand and the increasing complexity of the power environment, the performance requirements for low-voltage power cables are also becoming more stringent, among which anti-breakage performance is particularly important.

[0003] Traditional low-voltage power cables have revealed many problems in actual use. On the one hand, when the cable needs to be bent, especially for cables with hollow conductors, excessive bending angles can easily lead to conductor breakage.

[0004] In summary, existing low-voltage power cables have significant shortcomings in terms of fracture resistance, and a new technical solution is urgently needed to address these issues and meet the usage environment of power installations. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model proposes a breakage-resistant low-voltage power cable.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] A breakage-resistant low-voltage power cable includes a core, an outer sheath, and two slip rings. The outer sheath covers the outside of the core. The two slip rings are respectively fitted onto the outside of the outer sheath and slide in contact with it. A spring is fixedly connected between the two slip rings. A pre-tightening component is fixedly connected to one end of the spring, and a mounting block is fixedly connected to the other end of the spring. A connecting cable is detachably connected between the mounting block and the pre-tightening component. The connecting cable is used to bend and fix the cable.

[0008] Preferably, the pretensioning assembly includes a fixing block, which is fixedly connected to one end of the spring. A mounting cylinder is fixedly connected to one side of the fixing block, and a sliding cylinder is slidably connected inside the mounting cylinder. The sliding cylinder is detachably connected to one end of the connecting cable. A nut abuts against one end of the sliding cylinder, and the nut is screwed to one end of the mounting cylinder.

[0009] Preferably, the slide cylinder is divided into a sliding section, a conical section, and a guide section; the sliding section, the conical section, and the guide section are interconnected; the sliding section, the conical section, and the guide section are respectively adapted to and slide in contact with the inner wall of the slide cylinder; the sliding section, the conical section, and the guide section are all hollow and have the same wall thickness; the side of the conical section has several through holes, and a top ball is embedded in the through holes; the connecting cable passes through the guide section, the conical section, and the sliding section in sequence and abuts against the top ball.

[0010] Preferably, the nut is disposed in contact with one end of the sliding section, the inner wall of the sliding cylinder is threaded, and the sliding cylinder is screwed to the nut through the thread; a clearance hole is provided in the middle of the nut, and two wrench holes are symmetrically provided on the end face of the nut.

[0011] Preferably, the connecting cable is a multi-strand steel cable.

[0012] Preferably, the tapered section is made of hard rubber, the inner wall of the through hole has an arc-shaped structure, and the top ball can slide within the through hole.

[0013] Preferably, the bending force of the spring is 1N-10N; the spring is a square helical spring, and the gap between adjacent helical rings of the spring is 3mm-5mm.

[0014] Compared with the prior art, the present invention has the following advantages and technical effects:

[0015] This invention utilizes slip rings to move a spring on the outside of the cable. When bending and fixing the cable is required, two slip rings can be folded in half, and the spring between the two rings guides the bending of the cable core, preventing the core from bending too much due to its hollow structure and causing the conductor to break. Furthermore, since electrical fittings are often needed for fixing at bends, the pre-tightening assembly can both bend the cable ends to a certain angle using connecting cables and can also replace electrical fittings for fixing, reducing the procurement cost of electrical fittings. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a side view three-dimensional structural diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the pre-tightening assembly;

[0019] Figure 3This is a side view of the three-dimensional structure of the nut.

[0020] Among them, 1. Battery cell; 2. Outer casing; 3. Slip ring; 4. Spring; 5. Mounting block; 6. Connecting cable; 7. Fixing block; 8. Mounting cylinder; 9. Nut; 10. Sliding section; 11. Conical section; 12. Guide section; 13. Top ball; 14. Displacement hole; 15. Baffle hole. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] It should be noted that all components in the technical solution of this application require necessary additional facilities for water supply, oil supply, power supply, and gas supply for driving and / or control. Unless otherwise stated, they are assumed to be used and equipped with existing technology and no special explanation is required.

[0023] It should be noted that, in order to make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Depend on Figure 1-3 The diagram shows a low-voltage power cable designed to prevent breakage, comprising a core 1, an outer sheath 2, and two slip rings 3. The outer sheath 2 covers the outside of the core 1, and the two slip rings 3 are respectively fitted onto the outside of the outer sheath 2 and slide in contact with it. A spring 4 is fixedly connected between the two slip rings 3. A pre-tightening component is fixedly connected to one end of the spring 4, and a mounting block 5 is fixedly connected to the other end of the spring 4. A connecting cable 6 is detachably connected between the mounting block 5 and the pre-tightening component. The connecting cable 6 is used to bend and fix the cable.

[0025] Furthermore, cell 1 is a hollow conductor, which is a tubular conductor made of stranded wires or a hollow conductor composed of stranded wires wound into a fan-shaped spiral with reinforcing single strands. This reduces the weight of the conductor while ensuring power transmission efficiency and facilitates installation; it is existing technology and will not be elaborated further here.

[0026] The design is further optimized. The pre-tensioning component includes a fixing block 7, which is fixedly connected to one end of a spring 4. A mounting cylinder 8 is fixedly connected to one side of the fixing block 7. A sliding cylinder is slidably connected inside the mounting cylinder 8, and the sliding cylinder is detachably connected to one end of a connecting cable 6. A nut 9 abuts against one end of the sliding cylinder, and the nut 9 is screwed to one end of the mounting cylinder 8. The nut 9 pushes the sliding cylinder from one end of the mounting cylinder 8 to the other end, thereby fixing and clamping the cable placed inside the sliding cylinder.

[0027] The scheme is further optimized. The slide is divided into a sliding section 10, a conical section 11, and a guide section 12. The sliding section 10, the conical section 11, and the guide section 12 are connected to each other. The sliding section 10, the conical section 11, and the guide section 12 are adapted to the inner wall of the slide and slide in contact. The sliding section 10, the conical section 11, and the guide section 12 are all hollow and have the same wall thickness. Several through holes are opened on the side of the conical section 11. A top ball 13 is embedded in the through hole. The connecting cable 6 passes through the guide section 12, the conical section 11, and the sliding section 10 in sequence and abuts against the top ball 13. When the nut 9 is rotated, it pushes the sliding section 10. The sliding section 10 is a cylindrical structure and will slide towards the other end of the mounting cylinder 8. During this process, the top ball 13 will move together with the sliding section 10, pushing the conical section 11. The top ball 13 will contact the conical part of the inner wall of the mounting cylinder 8, thereby pushing the top ball 13 into the conical section 11, and then abutting the connecting cable 6 to achieve the fixation of the connecting cable 6.

[0028] Furthermore, the diameter of the guide section 12 is smaller than that of the sliding section 10, which facilitates the insertion of the slide cylinder into the mounting cylinder 8 via the tapered section 11.

[0029] In a further optimized design, the nut 9 is positioned to abut against one end of the sliding section 10. The inner wall of the sliding cylinder is threaded, and the cylinder is screwed to the nut 9 via these threads. A clearance hole 14 is provided in the middle of the nut 9, and two wrench holes 15 are symmetrically provided on the end face of the nut 9. The connecting cable 6 can pass through the entire pre-tightening assembly, facilitating the adjustment of the length of the connecting cable 6 and thus the adjustment of the cable's bending angle.

[0030] The design was further optimized by using multi-strand steel cables for connecting cable 6, which can withstand the compressive force of the spiral and provide tensile support for the entire cable.

[0031] The design was further optimized by making the tapered section 11 a hard rubber material, the inner wall of the through hole an arc structure, and the top ball 13 able to slide within the through hole.

[0032] Further optimization of the design resulted in spring 4 having a bending force of 1N-10N; spring 4 is a square helical spring with a gap of 3mm-5mm between adjacent helical rings. Spring 4 possesses a certain degree of elasticity, facilitating automatic recovery during adjustment. Simultaneously, the gap between adjacent helical rings of spring 4 serves to guide the cable during bending and also compensates for the mutual compression of springs 4 during bending.

[0033] The working process of this embodiment is as follows:

[0034] The low-voltage power cable with anti-breakage capability provided by this invention mainly includes a core 1, an outer sheath 2, and two slip rings 3. The outer sheath 2 tightly covers the outside of the core 1, providing insulation and protection. The two slip rings 3 are respectively fitted onto the outside of the outer sheath 2 and can slide smoothly in contact with the outer sheath 2, laying the foundation for the subsequent movement of the spring 4.

[0035] When the cable needs to be bent and secured, the operator can manually fold the two slip rings 3. Since the slip rings 3 slide in contact with the outer sheath 2, during the folding process, the slip rings 3 can drive the spring 4 to move on the outside of the cable. At this time, the spring 4 between the two slip rings 3 plays a crucial role, guiding the bending of the battery core 1. Specifically, the spring 4 has a certain bending elasticity (1N-10N) and is a square helical spring with a gap of 3mm-5mm between adjacent helical rings. This structural design allows the spring 4 to guide the cable during bending and also compensate for the mutual compression during bending through the gap between adjacent helical rings, effectively preventing the battery core 1 from breaking due to excessive bending angle caused by its hollow structure.

[0036] In actual operation, the operator rotates nut 9, which pushes the sliding cylinder from one end of the mounting cylinder 8 to the other. Since nut 9 is positioned to abut against one end of the sliding section 10, and the inner wall of the sliding cylinder is threaded, the sliding cylinder is screwed to nut 9 via these threads. Therefore, when nut 9 is rotated, the sliding section 10 slides towards the other end of the mounting cylinder 8. During this process, the top ball 13 moves along with the sliding section 10, pushing the tapered section 11. When the top ball 13 contacts the tapered portion of the inner wall of the mounting cylinder 8, it experiences an inward compressive force, which pushes the top ball 13 into the tapered section 11, ultimately abutting the connecting cable 6 and fixing it in place, thus bending both ends of the cable at a certain angle.

[0037] Furthermore, the connecting cable 6 is made of multi-strand steel cable, a material capable of withstanding helical compression and providing tensile support to the entire cable, thus enhancing its stability. The tapered section 11 is made of hard rubber, and the inner wall of the through hole has an arc-shaped structure, allowing the top ball 13 to slide smoothly within the through hole, ensuring the reliability of the pre-tightening assembly. The diameter of the guide section 12 is smaller than that of the sliding section 10, facilitating the insertion of the slide cylinder into the mounting cylinder 8 via the tapered section 11, improving the compactness and stability of the structure. The nut 9 has a clearance hole 14 in the middle and two symmetrically arranged wrench holes 15 on its end face, allowing operators to easily rotate the nut 9 with tools, improving operational convenience. The connecting cable 6 can pass through the entire pre-tightening assembly, allowing operators to easily adjust the length of the connecting cable 6, thereby precisely adjusting the bending angle of the cable to meet different usage requirements.

[0038] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A breakage-resistant low-voltage power cable, characterized in that, The cable includes a battery cell (1), an outer sheath (2), and two slip rings (3). The outer sheath (2) covers the outside of the battery cell (1). The two slip rings (3) are respectively fitted on the outside of the outer sheath (2) and slide in contact with the outer sheath (2). A spring (4) is fixedly connected between the two slip rings (3). A pre-tightening component is fixedly connected to one end of the spring (4), and a mounting block (5) is fixedly connected to the other end of the spring (4). A connecting cable (6) is detachably connected between the mounting block (5) and the pre-tightening component. The connecting cable (6) is used to bend and fix the cable.

2. The breakage-resistant low-voltage power cable according to claim 1, characterized in that: The pretensioning assembly includes a fixing block (7), which is fixedly connected to one end of the spring (4). An mounting cylinder (8) is fixedly connected to one side of the fixing block (7). A sliding cylinder is slidably connected inside the mounting cylinder (8). The sliding cylinder is detachably connected to one end of the connecting cable (6). A nut (9) abuts against one end of the sliding cylinder. The nut (9) is screwed to one end of the mounting cylinder (8).

3. The breakage-resistant low-voltage power cable according to claim 2, characterized in that: The slide is divided into a sliding section (10), a conical section (11), and a guide section (12); the sliding section (10), the conical section (11), and the guide section (12) are connected to each other; the sliding section (10), the conical section (11), and the guide section (12) are adapted to and slide in contact with the inner wall of the slide, the sliding section (10), the conical section (11), and the guide section (12) are all hollow and have the same wall thickness, the side of the conical section (11) is provided with several through holes, the through holes are embedded with a top ball (13), the connecting cable (6) passes through the guide section (12), the conical section (11), and the sliding section (10) in sequence and abuts against the top ball (13).

4. The breakage-resistant low-voltage power cable according to claim 3, characterized in that: The nut (9) is abutted against one end of the sliding section (10), the inner wall of the sliding cylinder is threaded, and the sliding cylinder is screwed to the nut (9) through the thread; the nut (9) is provided with a relief hole (14) in the middle, and two wrench holes (15) are symmetrically provided on the end face of the nut (9).

5. The breakage-resistant low-voltage power cable according to claim 1, characterized in that: The connecting cable (6) is a multi-strand steel cable.

6. The breakage-resistant low-voltage power cable according to claim 3, characterized in that: The conical section (11) is made of hard rubber, the inner wall of the through hole has an arc-shaped structure, and the top ball (13) can slide inside the through hole.

7. The breakage-resistant low-voltage power cable according to claim 1, characterized in that: The bending force of the spring (4) is 1N-10N; the spring (4) is a square helical spring (4), and the gap between adjacent helical rings of the spring (4) is 3mm-5mm.

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