Modified polypropylene insulated low-voltage power cable

Abstract

The utility model belongs to the technical field of power cables, and particularly relates to a modified polypropylene insulated low-voltage power cable, which comprises a sheath layer, the sheath layer comprises a buckle assembly, a sleeve is fixedly sleeved on the outer surface of one end of the sheath layer, clamping grooves are arranged at the upper end and the lower end of the sleeve, one end of the inner wall of each clamping groove is fixedly connected with a spring piece, and the other end of the inner wall of each clamping groove is fixedly connected with a cable. A pressing block is fixedly connected to one end of the top of the spring piece, a fixing block is fixedly connected to one end of the bottom of the spring piece, and a sliding groove is formed in the end, sleeved with the sleeve, of the sheath layer. When the cable is used, a worker can rapidly replace the sheath layer through the buckle assembly, the structure is relatively simple and rapid to operate, time and human input required by maintenance are reduced, the whole cable does not need to be replaced due to damage of the sheath layer, only the damaged sheath layer needs to be replaced, materials and replacement cost are greatly saved, and the cable is convenient to use. Interference of external factors on the cable is effectively prevented, and stability and safety of power transmission are ensured.

Description

Technical Field

[0001] This utility model belongs to the field of power cable technology, specifically relating to a modified polypropylene insulated low-voltage power cable. Background Technology

[0002] In modern society, a stable power supply is crucial for the normal operation of various sectors. With continuous technological advancements and the sustained growth in electricity demand, the performance requirements for power cables are also increasing.

[0003] Chinese patent CN214012595U discloses an insulated low-voltage power cable comprising, from the inside out, multiple stranded cable cores, a polyethylene wrapping layer, an oxygen-barrier extruded layer, a polypropylene wrapping layer, and a protective layer. The polyethylene wrapping layer contains a filler material surrounding the cable cores, and the surface of the polyethylene wrapping layer has a mesh-like groove. The advantage is that while meeting all technical requirements for flammability rating, the outer diameter and weight of the insulated low-voltage power cable are reduced, facilitating its installation and use in engineering projects.

[0004] During use, the aforementioned patent requires cable replacement when the protective layer is worn or damaged. Replacing only the protective layer is not feasible, which greatly wastes materials and increases replacement costs. It is also difficult to ensure the stability and safety of power transmission. Furthermore, the cable structure design cannot effectively enhance the cable's tensile strength and tensile properties, making it difficult to guarantee the stability of current transmission. Based on this, a modified polypropylene insulated low-voltage power cable is proposed for improvement. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a modified polypropylene insulated low-voltage power cable. It eliminates the need to replace the entire cable due to damage to the sheath layer; only the damaged sheath layer needs to be replaced, significantly saving materials and replacement costs. It effectively prevents interference from external factors, ensuring stable and safe power transmission. Furthermore, the support frame enhances the cable's tensile strength, improving its overall tensile strength and guaranteeing stable current transmission.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a modified polypropylene insulated low-voltage power cable, comprising a sheath layer, the sheath layer including a snap-fit ​​assembly, a sleeve fixedly fitted onto the outer surface of one end of the sheath layer, slots being provided at both the upper and lower ends of the sleeve, a spring plate fixedly connected to one end of the inner wall of the slot, a pressing block fixedly connected to the top end of the spring plate, and a fixing block fixedly connected to the bottom end of the spring plate, a sliding groove being provided at one end of the sheath layer fitted with the sleeve, a cylindrical head fixedly connected to the other end of the sheath layer, the cylindrical head being slidably connected to the inner wall of the sliding groove, a movable groove being provided at one end of the sheath layer connected to the sliding groove, a screw fixedly connected to one end of the inner wall of the movable groove, a latch movably connected to the outer surface of the screw, a spring movably connected to the bottom of one end of the latch, the bottom end of the spring being fixedly connected to the bottom wall of the movable groove, and the top end of the latch being fitted into the inner wall of the slot.

[0007] As a preferred embodiment of this utility model, the sheath layer contains a plurality of wire cores, and the outer surface of the plurality of wire cores is covered with an insulating layer.

[0008] As a preferred embodiment of the present invention, a support frame is provided on the outer surface of the insulating layer, and a filler layer is filled between the insulating layer and the support frame.

[0009] As a preferred embodiment of this utility model, the outer surface of the support frame is injection molded with a protective layer, the outer surface of the protective layer is covered with an armor layer, and the outer surface of the armor layer is sleeved with a protective sleeve layer.

[0010] In a preferred embodiment of this invention, the insulating layer is made of modified polypropylene material, and the filling layer is made of thermally conductive silicone.

[0011] As a preferred embodiment of this utility model, the center of the cylinder head and the center of the sliding groove are on the same straight line.

[0012] As a preferred embodiment of this utility model, the support frame has a circular outer shape and a cross-shaped inner axis.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. When using this utility model, the staff can quickly replace the sheath layer through the buckle component. This structure is relatively simple and quick to operate, reducing the time and manpower required for maintenance. It is not necessary to replace the entire cable due to damage to the sheath layer, but only the damaged sheath layer needs to be replaced, which greatly saves materials and replacement costs. It effectively prevents external factors from interfering with the cable and ensures the stability and safety of power transmission.

[0015] 2. When in use, the support frame of this utility model can enhance the tensile performance of the cable, improve the overall tensile strength of the cable, enable it to withstand greater tensile force without damaging the internal structure, and prevent the core from moving and tangling excessively when the cable is bent, stretched or subjected to external force, thereby ensuring the stability of current transmission. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the side structure of this utility model;

[0018] Figure 2 This is a front view structural diagram of the present utility model;

[0019] Figure 3 This is a structural diagram of the snap-fit ​​assembly;

[0020] Figure 4 This is a cross-sectional structural diagram of the snap-fit ​​assembly;

[0021] Figure 5 for Figure 4 A magnified structural diagram of point A in the middle.

[0022] Figure 6 for Figure 4 A magnified structural diagram at point B in the middle.

[0023] In the diagram: 1. Sheath layer; 2. Clip assembly; 21. Sleeve; 22. Pressing block; 23. Sleeve head; 24. Tongue; 25. Slide groove; 26. Spring; 27. Moving groove; 28. Screw; 29. ​​Spring plate; 210. Slot; 211. Fixing block; 3. Core wire; 4. Armor layer; 5. Protective layer; 6. Support frame; 7. Filling layer; 8. Insulation layer. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0025] Please see Figure 1 and Figures 3-6This utility model provides the following technical solution: a modified polypropylene insulated low-voltage power cable, including a sheath layer 1, the sheath layer 1 including a snap-fit ​​assembly 2, a sleeve 21 fixedly sleeved on the outer surface of one end of the sheath layer 1, the sleeve 21 having a slot 210 at both the upper and lower ends, a spring plate 29 fixedly connected to one end of the inner wall of the slot 210, a pressing block 22 fixedly connected to the top end of the spring plate 29, and a fixing block 211 fixedly connected to the bottom end of the spring plate 29, the sheath layer 1 being sleeved with the sleeve 2 One end of the sheath layer 1 is provided with a sliding groove 25, and the other end of the sheath layer 1 is fixedly connected to a cylindrical head 23. The cylindrical head 23 is slidably connected to the inner wall of the sliding groove 25. The end of the sheath layer 1 connected to the sliding groove 25 is provided with a moving groove 27. One end of the inner wall of the moving groove 27 is fixedly connected to a screw 28. The outer surface of the screw 28 is movably connected to a latch 24. One end of the latch 24 is movably connected to a spring 26. The bottom end of the spring 26 is fixedly connected to the bottom wall of the moving groove 27. The top end of the latch 24 is fitted into the inner wall of the latch groove 210.

[0026] Specifically, when the sheath layer 1 is damaged, the worker first presses the pressing block 22. The pressing block 22 pushes the fixing block 211 downward through the spring plate 29. As the fixing block 211 moves, it pushes the latch 24 downward, causing one end of the latch 24 to leave the inside of the slot 210 and release the latch. Then, the worker pulls the sheath layer 1 with the cylinder head 23 out of the slide groove 25 to complete the disassembly, achieving the purpose of disassembling the damaged sheath layer 1. Then, the worker slides one end of the new sheath layer 1 with the cylinder head 23 along the inner wall of the sleeve 21 towards the slide groove 25. During insertion, the latch 24 is squeezed, causing it to move downwards against the elastic force of the spring 26. When the cylinder head 23 is fully inserted into the slide groove 25, the latch 24 rebounds upwards under the elastic force of the spring 26, thus forming a latch and securing the replaced sheath layer 1. This structure is relatively simple and quick to operate, reducing the time and manpower required for maintenance. It is not necessary to replace the entire cable due to damage to the sheath layer 1; only the damaged sheath layer 1 needs to be replaced, which greatly saves materials and replacement costs. It effectively prevents external factors from interfering with the cable and ensures the stability and safety of power transmission.

[0027] Please see Figure 2 The sheath layer 1 contains several wire cores 3, and the outer surface of the several wire cores 3 is covered with an insulation layer 8.

[0028] Specifically, the outer surface of several conductors 3 is covered with an insulating layer 8, which can isolate each conductor 3 from each other, prevent current from being conducted between different conductors 3, and ensure that the current can be transmitted along the path of each conductor 3, thereby ensuring the safety and stability of power transmission.

[0029] Please see Figure 2 A support frame 6 is provided on the outer surface of the insulation layer 8, and a filler layer 7 is filled between the insulation layer 8 and the support frame 6.

[0030] Specifically, the support frame 6 is used to keep the core 3 and insulation layer 8 in a stable position and prevent them from being excessively displaced or deformed during cable use. The filler layer 7 can enhance the buffering effect, reduce the direct impact of external shocks on the core 3 and insulation layer 8, and improve the integrity and stability of the internal structure of the cable.

[0031] Please see Figure 2 The outer surface of the support frame 6 is injection molded with a protective layer 5, the outer surface of the protective layer 5 is covered with an armor layer 4, and the outer surface of the armor layer 4 is fitted with a sheath layer 1.

[0032] Specifically, the protective layer 5 can further enhance the protection of internal components, the armor layer 4 is mainly used to increase the mechanical strength of the cable, resist external forces such as compression, tension and impact, and protect the internal structure from damage, and the sheath layer 1 mainly plays a comprehensive protective role such as waterproofing, moisture-proofing, corrosion prevention and wear resistance.

[0033] Please see Figure 2 The insulating layer 8 is made of modified polypropylene material, and the filling layer 7 is made of thermally conductive silicone.

[0034] Specifically, the insulation layer 8 uses modified polypropylene, which can effectively prevent current leakage and ensure the safety of power transmission. The filling layer 7 uses thermally conductive silicone, which can help the heat generated by the core 3 during operation to dissipate more quickly, avoid local overheating, play a certain buffering role, and protect the internal structure.

[0035] Please see Figure 4 The center of the cylinder head 23 and the center of the groove 25 are on the same straight line.

[0036] Specifically, the center of the cylindrical head 23 and the center of the groove 25 are on the same straight line, which can make the fit between the cylindrical head 23 and the groove 25 tight and uniform, without deviation or jamming, thus ensuring the stability and reliability of the cable sheath layer 1 connection.

[0037] Please see Figure 2 The support frame 6 has a circular outer shape and a cross-shaped inner axis.

[0038] Specifically, the support frame 6 has a circular outer shape, which helps to distribute the support force evenly inside the cable and fit better with the surrounding structure. The internal cross-shaped structure can provide stable support in different directions, enhancing the overall strength and stability of the support frame 6.

[0039] The working principle and usage process of this utility model are as follows: When the sheath layer 1 is damaged during use, the operator first presses the pressing block 22. The pressing block 22, through the spring plate 29, pushes the fixing block 211 downwards. Simultaneously, the fixing block 211 moves, pushing the latch 24 downwards, causing one end of the latch 24 to leave the slot 210, thus releasing the latch. Then, the operator pulls the sheath layer 1 with the cylindrical head 23 out of the slide groove 25, completing the disassembly and achieving the purpose of disassembling the damaged sheath layer 1. Next, the operator slides one end of the new sheath layer 1 with the cylindrical head 23 along the inner wall of the sleeve 21 towards the slide groove 25. During the insertion of the cylindrical head 23, it squeezes the latch 24, causing the latch 24 to overcome the elastic force of the spring 26 and move downwards. When the cylindrical head 23 is fully inserted... The cable is fully inserted into the groove 25, and the latch 24 rebounds upward under the elastic force of the spring 26, thus forming a latch to fix the replaced sheath layer 1. This structure is relatively simple and quick to operate, reducing the time and manpower required for maintenance. It is not necessary to replace the entire cable due to damage to the sheath layer 1; only the damaged sheath layer 1 needs to be replaced, which greatly saves materials and replacement costs. It effectively prevents external factors from interfering with the cable, ensuring the stability and safety of power transmission. The support frame 6 enhances the tensile performance of the cable, improves the overall tensile strength of the cable, and enables it to withstand greater tensile forces without damaging the internal structure. It also prevents the conductor 3 from excessively moving and tangling when the cable is bent, stretched, or subjected to external forces, thereby ensuring the stability of current transmission.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A modified polypropylene insulated low-voltage power cable, comprising a sheath layer (1), characterized in that: The sheath layer (1) includes a snap-fit ​​assembly (2). A sleeve (21) is fixedly fitted onto the outer surface of one end of the sheath layer (1). Both ends of the sleeve (21) are provided with slots (210). A spring plate (29) is fixedly connected to one end of the inner wall of the slot (210). A pressing block (22) is fixedly connected to the top end of the spring plate (29). A fixing block (211) is fixedly connected to the bottom end of the spring plate (29). A sliding groove (25) is provided at the end of the sheath layer (1) where the sleeve (21) is fitted. The other end of the sheath layer (1) is provided with a sliding groove (25). A cylindrical head (23) is fixedly connected to the end of the sleeve layer (1), and the cylindrical head (23) is slidably connected to the inner wall of the slide groove (25). A movable groove (27) is opened at one end of the slide groove (25). A screw (28) is fixedly connected to one end of the inner wall of the movable groove (27). A latch (24) is movably connected to the outer surface of the screw (28). A spring (26) is movably connected to the bottom of one end of the latch (24). The bottom end of the spring (26) is fixedly connected to the bottom wall of the movable groove (27). The top end of the latch (24) is fitted into the inner wall of the groove (210).

2. The modified polypropylene insulated low-voltage power cable according to claim 1, characterized in that: The sheath layer (1) has a plurality of wire cores (3) inside, and the outer surface of the plurality of wire cores (3) is covered with an insulating layer (8).

3. The modified polypropylene insulated low-voltage power cable according to claim 2, characterized in that: The outer surface of the insulating layer (8) is provided with a support frame (6), and a filling layer (7) is filled between the insulating layer (8) and the support frame (6).

4. The modified polypropylene insulated low-voltage power cable according to claim 3, characterized in that: The outer surface of the support frame (6) is injection molded with a protective layer (5), the outer surface of the protective layer (5) is covered with an armor layer (4), and the outer surface of the armor layer (4) is fitted with a sheath layer (1).

5. A modified polypropylene insulated low-voltage power cable according to claim 3, characterized in that: The insulating layer (8) is made of modified polypropylene material, and the filling layer (7) is made of thermally conductive silicone.

6. The modified polypropylene insulated low-voltage power cable according to claim 1, characterized in that: The center of the cylinder head (23) and the center of the groove (25) are on the same straight line.

7. A modified polypropylene insulated low-voltage power cable according to claim 3, characterized in that: The support frame (6) has a circular outer shape and a cross-shaped inner structure.

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