Anti-fracture low-voltage power cable

Abstract

The invention discloses an anti-fracture low-voltage power cable, and relates to the technical field of low-voltage cables, the anti-fracture low-voltage power cable comprises three core bodies, the surfaces of the three core bodies are all sleeved with shielding layers, the surfaces of the shielding layers are wrapped with insulating layers, the outer sides of the three core bodies are sleeved with an inner protection layer, the surface of the inner protection layer is sleeved with a thermal insulation layer, and the thermal insulation layer is wrapped with an outer protection layer. The outer side of the thermal insulation layer is sleeved with an outer protection layer, the surface of the outer protection layer is provided with a sliding protection mechanism, and the inner side of the outer protection layer is provided with a reinforcing anti-breaking mechanism in an embedded manner. And when the cable slides, the outer protection layer is not rubbed with the ground, so that the outer protection layer of the cable is prevented from being rubbed and scraped to influence subsequent normal use, the cable is protected to a certain degree, and impurities such as dust and soil adhered to the surface of the cable in the cable transportation and laying process can be scraped.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage cables, in particular to a fracture-resistant low-voltage power cable. Background Art

[0002] Power cables are used to transmit and distribute electric energy. They are commonly used in urban underground power grids, power station lead-out lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas. In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electric energy in the trunk lines of power systems, including 1-500KV and various voltage levels above, various insulated power cables, which can be divided into high-voltage cables and low-voltage cables according to voltage. Low-voltage cable lines have the characteristics of reliable operation, no poles, no ground occupation, no obstruction of appearance, and less impact from the outside world, and are widely used in low-voltage distribution systems;

[0003] However, currently, when installing low-voltage cables, workers need to drag them to a specific installation location, which is labor-intensive. In addition, the surface of the cable will rub against the ground during dragging, which can easily damage the surface of the cable and affect its normal use. At the same time, a large amount of dust is easily adhered to the surface of the cable during transportation and installation, and the surface needs to be cleaned manually. However, some soil is solidified and difficult to remove. Therefore, the present invention provides a break-resistant low-voltage power cable to meet people's needs. Summary of the invention

[0004] The present invention provides a break-resistant low-voltage power cable, which can effectively solve the problem proposed in the above-mentioned background technology that the low-voltage cable needs to be dragged to a specific installation position by workers during installation, which has high labor intensity, and the surface of the cable will rub against the ground during dragging, which can easily cause damage to the surface of the cable and affect its normal use. At the same time, a large amount of dust is easily adhered to the surface of the cable during transportation and installation, and the surface needs to be cleaned manually, while some soil is solidified and difficult to remove.

[0005] To achieve the above object, the present invention provides the following technical solution: a fracture-resistant low-voltage power cable, comprising three cores, the surfaces of the three cores are all sleeved with shielding layers, and the surfaces of the shielding layers are wrapped with insulating layers;

[0006] An inner protective layer is sleeved on the outer side of the three cores, a heat preservation layer is sleeved on the surface of the inner protective layer, an outer protective layer is sleeved on the outer side of the heat preservation layer, a sliding protection mechanism is installed on the surface of the outer protective layer, and a reinforcement anti-break mechanism is embedded and installed on the inner side of the outer protective layer;

[0007] The sliding protection mechanism includes a sliding slot;

[0008] The surface of the outer protective layer is provided with sliding grooves at equal intervals, an upper mounting arc plate is fitted on the top of the surface of the outer protective layer at one side of the sliding groove, and a lower mounting arc plate is fitted on the bottom of the surface of the outer protective layer at one side of the sliding groove;

[0009] The two ends of the bottom of the upper arc plate are symmetrically fixedly connected with upper fitting blocks, the two ends of the top of the lower arc plate are symmetrically fixedly connected with lower fitting blocks, and a locking bolt is installed in the middle of the upper fitting block;

[0010] A mounting seat is fixedly mounted at the middle of the bottom end of the lower mounting arc plate, and rollers are symmetrically mounted at the middle of the mounting seat.

[0011] According to the anti-fracture low-voltage power cable of claim 1, the upper mounting arc plate and the lower mounting arc plate are spliced ​​and fitted with each other, and the bottom end of the upper fitting block and the top end of the lower fitting block are fitted with each other;

[0012] The locking bolt movably penetrates the upper fitting block and the lower fitting block, and the locking bolt locks and fixes the upper fitting block and the lower fitting block.

[0013] According to the anti-fracture low-voltage power cable of the claim, one end of the upper bonding block is fixedly connected to an upper splicing frame, one end of the lower bonding block is fixedly connected to a lower splicing frame, an upper movable rod is movably installed through the middle of the upper splicing frame, and a lower movable rod is movably installed through the middle of the lower splicing frame;

[0014] The top end of the upper movable rod and the bottom end of the lower movable rod are both fixedly connected with connecting blocks, and an upper movable arc plate is fixedly connected between the two connecting blocks at the top end of the upper movable rod;

[0015] A lower movable arc plate is fixedly connected between the two connecting blocks located at the bottom end of the lower movable rod, and arc-shaped clamping blocks are fixedly installed in the middle of the inner walls of the upper movable arc plate and the lower movable arc plate;

[0016] The top end of the lower movable rod and the bottom end of the upper movable rod are both fixedly connected with a fixing block, and the bottom of the fixing block located at the bottom end of the upper movable rod is fixedly connected with a rubber airbag;

[0017] One end of the upper splicing frame is fixedly connected to a fixed vertical plate, an adjusting stud is installed through the middle of the fixed vertical plate, the end of the adjusting stud is fixedly connected to an extrusion block, and both ends of the middle of the fixed vertical plate are symmetrically fixedly connected to sealing blocks.

[0018] According to the anti-fracture low-voltage power cable described in claim, the upper movable arc plate and the lower movable arc plate correspond to the positions of the sliding slot, the upper movable arc plate and the lower movable arc plate are respectively located above and below the sliding slot, and the arc-shaped card block is movably embedded in the interior of the sliding slot.

[0019] According to the anti-break low-voltage power cable of the claim, the adjusting stud and the fixed vertical plate are connected by threads, and the extrusion block is tightly attached to the surface of one end of the rubber airbag.

[0020] According to the anti-fracture low-voltage power cable of claim, the upper splicing frame and the lower splicing frame are spliced ​​with each other, the rubber airbag is located in the middle of the upper splicing frame and the lower splicing frame, and the sealing block is in contact with the edge of the rubber airbag.

[0021] According to the anti-break low-voltage power cable of claim 1, the anti-break reinforcement mechanism comprises a triangular support block;

[0022] A triangular support block is fixedly installed in the middle of the inner side of the outer protective layer, a positioning rod is installed through the middle of the triangular support block, and adhesive strips are fixedly installed at the three ends of the triangular support block, and a support ring is equidistantly embedded in the inner side of the inner protective layer;

[0023] The inner side of the support ring is equidistantly installed with reinforcing metal wires along the circumferential direction, the inner side of the support ring is fixedly connected with a heat-conducting metal strip at a position on one side of the reinforcing metal wire, the inner side of the heat-conducting metal strip is fixedly connected with a limiting strip, and the inner side of the inner protective layer is filled with a filling layer;

[0024] A waterproof layer is sleeved on the surface of the thermal insulation layer, positioning strips are fixedly installed on the surface of the waterproof layer at equal intervals along the circumferential direction, an anti-break metal wire is embedded in the middle of the surface of the positioning strip, and buffer strips are installed on the surface of the waterproof layer at equal intervals at one side of the positioning strip, and metal springs are embedded on the surface of the buffer strip.

[0025] According to the anti-fracture low-voltage power cable of the claim, the triangular support block is located in the middle of the three cores, the three cores correspond to the three ends of the triangular support block, and the surface of the insulating layer is tightly fitted with the adhesive strip.

[0026] According to the anti-fracture low-voltage power cable described in the claim, the number of the reinforcing metal wires and the limiting strips are three, the three reinforcing metal wires and the three cores are equidistantly and staggeredly distributed, and the three limiting strips are closely attached to the surfaces of the three cores respectively.

[0027] According to the anti-break low-voltage power cable of the claim, the edge of the positioning strip fits with the edge of the buffer strip, the metal spring pieces and the anti-break metal wires are equidistantly and staggeredly distributed, the inner wall of the outer protective layer is equidistantly provided with arc grooves, and the top of the metal spring piece is embedded in the interior of the arc groove.

[0028] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a scientific and reasonable structure and is safe and convenient to use:

[0029] 1. A sliding protection mechanism is provided, and the upper fitting block and the lower fitting block are locked and fixed by the locking bolts, so that the upper mounting arc plate and the lower mounting arc plate can be locked and fixed on the surface of the outer protective layer, and then the mounting seat and the roller are located below the cable, which plays a role in auxiliary transportation, reduces the labor intensity of laying, and is convenient for the staff to drag the cable, which is more labor-saving. When the cable slides, the outer protective layer will not rub against the ground, preventing the outer protective layer of the cable from being scratched by friction and affecting the subsequent normal use, which plays a certain protective role on the cable;

[0030] At the same time, the upper mounted arc plate and the lower mounted arc plate are spliced ​​together and surround the surface of the cable. The upper mounted arc plate and the lower mounted arc plate are pulled by rollers to slide close to the outer protective layer, which plays a certain cleaning role on the outer protective layer, and scrapes off impurities such as dust and dirt adhering to the surface of the cable during transportation and laying, so that the cable surface remains clean.

[0031] 2. The upper splicing frame and the lower splicing frame are spliced ​​together, so that the upper movable arc plate and the lower movable arc plate are also spliced ​​together, corresponding to the position of the sliding card slot, and the arc-shaped card block is embedded in the sliding card slot to limit and intercept the upper and lower installation arc plates, so that there will be no corresponding displacement between the upper and lower installation arc plates and the outer protective layer, thereby improving the stability of the roller installation, always supporting the cable at an equal distance, and preventing the upper and lower installation arc plates from sliding along the outer protective layer when dragging the cable, causing the roller to be misaligned, and the change in the roller spacing is likely to cause part of the cable to sink and contact the ground, causing friction damage;

[0032] At the same time, the position of the extrusion block is adjusted by adjusting the studs, so that it squeezes the rubber airbag, so that the rubber airbag expands and deforms in the upper and lower directions respectively, and squeezes the fixed block. The lower movable rod and the upper movable rod simultaneously play a guiding role, so that the upper movable arc plate and the lower movable arc plate can move upward and downward respectively, and the position of the arc block is adjusted. The arc block is away from the sliding card slot, which is convenient for pulling the upper installation arc plate and the lower installation arc plate for sliding cleaning. It can be adjusted according to the needs of the cable installation process, which is more convenient to use;

[0033] The sealing block, the upper splicing frame and the lower splicing frame all limit the rubber airbag, so that the rubber airbag will only expand upward and downward after being squeezed, preventing the rubber airbag from expanding and deforming to the side, making it impossible to adjust the position of the upper and lower movable arc plates.

[0034] 3. A reinforcement and anti-break mechanism is provided, and the triangular support block is used to support and position the core body, so that the core body maintains an equal spacing during installation, and the adhesive strip adheres and fixes the core body to prevent it from falling off the triangular support block, and the limit strip fits the core body firmly from the surface, so that the position of the core body will not be offset or skewed, which provides great convenience for the subsequent sleeve installation of materials;

[0035] At the same time, the positioning rod improves the structural strength of the center of the cable, making it less likely to break in the middle of the cable. The reinforcing metal wires are staggered with the core body to support and protect the surrounding of the core body, relieve the external pressure on the core body, and the support ring surrounds the outside of the core body to protect the core body, thereby improving the cable's compressive resistance.

[0036] 4. Anti-breaking metal wires and metal shrapnel are staggered in the cable to improve the structural strength of the cable itself and the compressive resistance of the cable surface, preventing the cable from breaking due to external pressure. The buffer strips and metal shrapnel have a certain elastic buffering capacity, which can relieve the pressure.

[0037] The triangular support blocks and positioning rods are used to reinforce and protect the center of the cable, while the reinforcing metal wires and support rings support and protect the periphery of the core. At the same time, anti-break metal wires and metal shrapnel are used to enhance protection near the surface of the cable. The compressive strength is improved at three levels, providing multi-level protection for the cable and effectively extending the service life of the cable.

[0038] 5. The heat generated by the core can be absorbed by the heat-conducting metal strip, which increases the heat dissipation area for heat transfer to the outside and prevents excessive heat around the core from affecting its normal energy transmission. At the same time, the filling layer is used to fill and protect the area around the core to relieve the external pressure on it and isolate the cores from each other to prevent the cores from being close to each other after being compressed and causing mutual influence. The waterproof layer improves the waterproofness of the cable, so that external moisture will not penetrate inward and affect the core.

[0039] To sum up, the sliding protection mechanism and the reinforcement anti-break mechanism are combined to enhance the protection of the cable. The sliding protection mechanism can reduce the friction of the cable during laying and dragging, prevent its surface from being worn, and protect the surface of the cable. The reinforcement anti-break mechanism enhances the structural strength of the cable itself through multi-level protection to improve the cable's compressive capacity, so that the cable will not break after being compressed during use, affecting normal use. Multi-faceted protection is achieved, the safety of cable installation and use is improved, and the service life of the cable is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0041] In the attached picture:

[0042] Figure 1 It is a schematic diagram of the structure of the present invention;

[0043] Figure 2 It is a schematic diagram of the installation structure of the roller of the present invention;

[0044] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0045] Figure 4 It is a schematic diagram of the installation structure of the sealing stopper of the present invention;

[0046] Figure 5 It is a schematic diagram of the installation structure of the upper movable arc plate of the present invention;

[0047] Figure 6 It is a structural schematic diagram of the sliding protection mechanism of the present invention;

[0048] Figure 7 It is a schematic diagram of the installation structure of the triangular support block of the present invention;

[0049] Figure 8 It is a structural schematic diagram of the reinforcement and anti-breakage mechanism of the present invention;

[0050] Fig. 9 It is a schematic diagram of the installation structure of the support ring of the present invention;

[0051] Fig.10 The present invention Fig. 9 A magnified schematic diagram of the middle A area;

[0052] Numbers in the figure: 1, core; 2, shielding layer; 3, insulation layer; 4, inner protective layer; 5, insulation layer; 6, outer protective layer;

[0053] 7. Sliding protection mechanism; 701. Sliding card slot; 702. Upper arc plate; 703. Lower arc plate; 704. Upper fitting block; 705. Lower fitting block; 706. Locking bolt; 707. Mounting seat; 708. Roller; 709. Upper splicing frame; 710. Lower splicing frame; 711. Lower movable rod; 712. Connecting block; 713. Upper movable arc plate; 714. Lower movable arc plate; 715. Arc card block; 716. Fixed block; 717. Rubber airbag; 718. Fixed vertical plate; 719. Adjusting stud; 720. Extrusion block; 721. Sealing block; 722. Upper movable rod;

[0054] 8. Reinforcement of anti-break mechanism; 801. Triangular support block; 802. Positioning rod; 803. Adhesive strip; 804. Reinforcement metal wire; 805. Support ring; 806. Heat-conducting metal strip; 807. Limiting strip; 808. Filling layer; 809. Waterproof layer; 810. Positioning strip; 811. Anti-break metal wire; 812. Buffer strip; 813. Metal shrapnel. DETAILED DESCRIPTION

[0055] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0056] Example: Figure 1-10 As shown, the present invention provides a technical solution, a fracture-proof low-voltage power cable, comprising three core bodies 1, the surfaces of the three core bodies 1 are all sleeved with a shielding layer 2, the shielding layer 2 is a copper wire braided mesh, shielding electromagnetic interference, the surface of the shielding layer 2 is wrapped with an insulating layer 3, the insulating layer 3 is formed by extrusion and wrapping of insulating rubber, and plays a role of insulation protection, the outer side of the three core bodies 1 is sleeved with an inner protective layer 4, the inner protective layer 4 is insulating rubber, the surface of the inner protective layer 4 is sleeved with a thermal insulation layer 5, the thermal insulation layer 5 is made of polyurethane material, insulates the heat of the cable, and achieves a certain thermal insulation effect, the outer side of the thermal insulation layer 5 is sleeved with an outer protective layer 6, the outer protective layer 6 is hard rubber, and a sliding protection mechanism 7 is installed on the surface of the outer protective layer 6;

[0057] The sliding protection mechanism 7 includes a sliding card slot 701, an upper mounting arc plate 702, a lower mounting arc plate 703, an upper fitting block 704, a lower fitting block 705, a locking bolt 706, a mounting seat 707, a roller 708, an upper splicing frame 709, a lower splicing frame 710, a lower movable rod 711, a connecting block 712, an upper movable arc plate 713, a lower movable arc plate 714, an arc card block 715, a fixing block 716, a rubber airbag 717, a fixing vertical plate 718, an adjusting stud 719, an extrusion block 720, a sealing block 721 and an upper movable rod 722;

[0058] The surface of the outer protective layer 6 is equidistantly provided with sliding grooves 701, an upper mounting arc plate 702 is fitted and installed on the top of the surface of the outer protective layer 6 at one side of the sliding groove 701, and a lower mounting arc plate 703 is fitted and installed on the bottom of the surface of the outer protective layer 6 at one side of the sliding groove 701, upper fitting blocks 704 are symmetrically fixedly connected to the two ends of the bottom of the upper mounting arc plate 702, and lower fitting blocks 705 are symmetrically fixedly connected to the two ends of the top of the lower mounting arc plate 703, a locking bolt 706 is installed in the middle of the upper fitting block 704, a mounting seat 707 is fixedly installed in the middle of the bottom end of the lower mounting arc plate 703, and rollers 708 are symmetrically installed in the middle of the mounting seat 707, the upper mounting arc plate 702 and the lower mounting arc plate 703 are spliced ​​and fitted with each other, and the bottom end of the upper fitting block 704 and the lower fitting The tops of the fitting blocks 705 fit together, and the locking bolts 706 movably penetrate the upper fitting block 704 and the lower fitting block 705. The locking bolts 706 lock and fix the upper fitting block 704 and the lower fitting block 705. The locking bolts 706 are used to lock and fix the upper fitting block 704 and the lower fitting block 705, so that the upper mounting arc plate 702 and the lower mounting arc plate 703 can be locked and fixed on the surface of the outer protective layer 6, and then the mounting seat 707 and the roller 708 are located below the cable, which plays a role in auxiliary transportation, reduces the labor intensity of laying, and is convenient for the staff to drag the cable to move forward, which is more labor-saving. When the cable slides, the outer protective layer 6 will not rub against the ground, preventing the outer protective layer 6 of the cable from being scratched by friction and affecting the subsequent normal use, which plays a certain protective role on the cable.

[0059] At the same time, the upper arc plate 702 and the lower arc plate 703 are spliced ​​together and surround the surface of the cable. The upper arc plate 702 and the lower arc plate 703 are pulled by the roller 708 to slide close to the outer protective layer 6, which plays a certain cleaning role on the outer protective layer 6, and scrapes away impurities such as dust and dirt adhering to the surface of the cable during the transportation and laying process, so that the cable surface remains clean;

[0060] One end of the upper fitting block 704 is fixedly connected to an upper splicing frame 709, one end of the lower fitting block 705 is fixedly connected to a lower splicing frame 710, an upper movable rod 722 is movably installed through the middle of the upper splicing frame 709, and a lower movable rod 711 is movably installed through the middle of the lower splicing frame 710, the top of the upper movable rod 722 and the bottom of the lower movable rod 711 are both fixedly connected to a connecting block 712, and an upper movable arc plate 711 is fixedly connected between the two connecting blocks 712 at the top of the upper movable rod 722 3. A lower movable arc plate 714 is fixedly connected between the two connecting blocks 712 at the bottom end of the lower movable rod 711. An arc-shaped block 715 is fixedly installed at the middle of the inner wall of the upper movable arc plate 713 and the lower movable arc plate 714. The upper movable arc plate 713 and the lower movable arc plate 714 correspond to the positions of the sliding slot 701. The upper movable arc plate 713 and the lower movable arc plate 714 are respectively located above and below the sliding slot 701. The arc-shaped block 715 is movably embedded in the interior of the sliding slot 701. The upper splicing frame 709 and the lower splicing frame 710 are spliced ​​together, so that the upper movable arc plate 713 and the lower movable arc plate 714 are also spliced ​​together, corresponding to the position of the sliding card slot 701. In order to slide along the surface of the outer protective layer 6 for cleaning, the upper installation arc plate 702 and the lower installation arc plate 703 maintain a certain mobility with the outer protective layer 6, and can slide relative to each other while being attached to the surface of the outer protective layer 6. The arc block 715 is embedded in the interior of the sliding card slot 701 to The arc plate 702 and the lower arc plate 703 play a role of limiting and intercepting, so that there will be no corresponding displacement between the upper arc plate 702 and the lower arc plate 703 and the outer protective layer 6, which improves the stability of the installation of the roller 708, and always supports the cable at an equal distance, preventing the upper arc plate 702 and the lower arc plate 703 from sliding along the outer protective layer 6 when dragging the cable, causing the roller 708 to be misplaced, and the change in the spacing between the rollers 708 is likely to cause part of the cable to sink and contact the ground, causing friction damage;

[0061] The top end of the lower movable rod 711 and the bottom end of the upper movable rod 722 are both fixedly connected with a fixed block 716, and the bottom of the fixed block 716 located at the bottom of the upper movable rod 722 is fixedly connected with a rubber airbag 717, one end of the upper splicing frame 709 is fixedly connected with a fixed vertical plate 718, and an adjusting stud 719 is installed through the middle of the fixed vertical plate 718, and an extrusion block 720 is fixedly connected to the end of the adjusting stud 719. The adjusting stud 719 and the fixed vertical plate 718 are connected by threads, and the extrusion block 720 is tightly attached to one end surface of the rubber airbag 717. The two ends of the middle of the fixed vertical plate 718 are symmetrically fixedly connected with sealing blocks 721. The upper splicing frame 709 and the lower splicing frame 710 are spliced ​​with each other, and the rubber airbag 717 is located between the upper splicing frame 709 and the lower splicing frame In the middle of the connecting frame 710, the sealing stopper 721 fits with the edge of the rubber airbag 717, and the position of the extrusion block 720 is adjusted by using the adjusting stud 719, so that the rubber airbag 717 is squeezed, so that the rubber airbag 717 expands and deforms in the upper and lower directions respectively, and squeezes the fixed block 716. The lower movable rod 711 and the upper movable rod 722 play a guiding role at the same time, so that the upper movable arc plate 713 and the lower movable arc plate 714 can move upward and downward respectively, and the position of the arc block 715 is adjusted. The arc block 715 is away from the sliding groove 701, which is convenient for pulling the upper installation arc plate 702 and the lower installation arc plate 703 for sliding cleaning. It can be adjusted according to the needs of the cable installation process, and it is more convenient to use;

[0062] The sealing block 721, the upper splicing frame 709 and the lower splicing frame 710 all play a role in limiting the rubber airbag 717, so that the rubber airbag 717 can only expand upward and downward after being squeezed, preventing the rubber airbag 717 from expanding and deforming to the side, which makes it impossible to adjust the position of the upper movable arc plate 713 and the lower movable arc plate 714;

[0063] A reinforcement anti-break mechanism 8 is installed on the inner side of the outer protective layer 6;

[0064] The reinforcement anti-break mechanism 8 includes a triangular support block 801, a positioning rod 802, an adhesive strip 803, a reinforcement wire 804, a support ring 805, a heat-conducting metal strip 806, a limit strip 807, a filling layer 808, a waterproof layer 809, a positioning strip 810, an anti-break wire 811, a buffer strip 812 and a metal spring 813;

[0065] A triangular support block 801 is fixedly installed in the middle of the inner side of the outer protective layer 6, a positioning rod 802 is installed through the middle of the triangular support block 801, and adhesive strips 803 are fixedly installed on the three ends of the triangular support block 801. The triangular support block 801 is located in the middle of the three core bodies 1, and the three core bodies 1 correspond to the three ends of the triangular support block 801. The surface of the insulating layer 3 is tightly fitted with the adhesive strip 803, and a support ring 805 is equidistantly embedded and installed on the inner side of the inner protective layer 4. Reinforcement wires 804 are equidistantly installed on the inner side of the support ring 805 along the circumferential direction. The inner side of the support ring 805 is fixedly connected with a heat-conducting metal strip 806 at a position on one side of the reinforcement wire 804. The inner side of the heat-conducting metal strip 806 is fixedly connected to the limiting strip 807, and the triangular support block 801 is used to support and position the core 1. The triangular support block 801 is made of rubber, and while supporting and protecting the core 1, it will not damage the core 1, so that the core 1 maintains an equal spacing during installation, and the adhesive strip 803 adheres and fixes the core 1 so that it will not fall off the triangular support block 801, and the limiting strip 807 fits the core 1 firmly from the surface, so that the position of the core 1 will not be offset or skewed, which provides great convenience for the subsequent sleeve installation of materials. The limiting strip 807 is a soft rubber strip, which is pressed tightly against the surface of the insulating layer 3 and will not damage it;

[0066] At the same time, the positioning rod 802 improves the structural strength of the center of the cable, making it difficult for the cable to break in the middle, and the reinforcing wire 804 is staggered with the core 1 to support and protect the core 1, thereby alleviating the pressure on the core 1 from the outside, and the support ring 805 surrounds the outside of the core 1 to protect the core 1, thereby improving the compression resistance of the cable;

[0067] The number of the reinforcing wires 804 and the limiting strips 807 are both three, and the three reinforcing wires 804 and the three core bodies 1 are equidistantly staggered. The three limiting strips 807 are closely attached to the surfaces of the three core bodies 1, respectively. The inner side of the inner protective layer 4 is filled with a filling layer 808, and the filling layer 808 is a polymer glass fiber, which plays a buffering and protective role for the core body 1 inside the cable. The surface of the thermal insulation layer 5 is sleeved with a waterproof layer 809, and the surface of the waterproof layer 809 is fixedly installed with positioning strips 810 at equal intervals along the circumferential direction. The middle part of the surface of the positioning strip 810 is embedded with an anti-breaking wire 811, and the positioning strip 810 is a rubber strip, which supports and limits the anti-breaking wire 811, and the surface of the waterproof layer 809 is located on one side of the positioning strip 810. Buffer strips 812 are installed at equal intervals at the positions, and metal springs 813 are embedded and installed on the surface of the buffer strips 812. The edge of the positioning strip 810 fits with the edge of the buffer strip 812. The metal springs 813 and the anti-breaking metal wires 811 are staggered and distributed at equal intervals. The inner wall of the outer protective layer 6 is provided with arc grooves at equal intervals. The top of the metal springs 813 is embedded in the arc groove. The anti-breaking metal wires 811 and the metal springs 813 are staggered and distributed in the cable, which improves the structural strength of the cable itself, enhances the compressive resistance of the cable surface, and prevents the cable from being broken due to the squeezing effect of external pressure. The buffer strip 812 is made of elastic rubber. The buffer strip 812 and the metal springs 813 have a certain elastic buffering capacity, which can relieve the pressure.

[0068] The triangular support block 801 and the positioning rod 802 are used to reinforce and protect the center of the cable, while the reinforcing metal wire 804 and the supporting ring 805 support and protect the periphery of the core body 1. At the same time, the anti-break metal wire 811 and the metal spring 813 are used to enhance the protection near the surface of the cable. The compressive strength is improved from three levels, which provides multi-level protection for the cable and effectively prolongs the service life of the cable.

[0069] The heat generated by the core 1 can be absorbed by the heat-conducting metal strip 806, thereby increasing the heat dissipation area for heat transfer to the outside and preventing excessive heat around the core 1 from affecting its normal energy transmission. At the same time, the filling layer 808 is used to fill and protect the area around the core 1 to alleviate the external pressure it is subjected to, and the cores 1 are isolated from each other to prevent the cores 1 from approaching each other after being compressed and causing mutual influence. The waterproof layer 809 is wrapped with an aluminum-plastic composite tape, which improves the waterproofness of the cable and prevents external moisture from penetrating inward to affect the core 1.

[0070] The working principle and use process of the present invention are as follows: First, during the cable production process, the triangular support block 801 is located at the center position to separate and position the positions of the three core bodies 1, so that the three core bodies 1 are respectively located at the three ends of the triangular support block 801, and the surface of the core body 1 is sequentially sleeved and wrapped with the shielding layer 2 and the insulating layer 3, and the insulating layer 3 is adhered and fixed by the adhesive strip 803, so that the position of the core body 1 is fixed, and at the same time, the support ring 805 surrounds the outside of the core body 1, and the limit strip 807 is tightly attached to the surface of the insulating layer 3, which presses and fits the core body 1, and the reinforcing metal wire 804 and the core body 1 are staggered and equidistantly distributed, and the inner protective layer 4 is wrapped and sleeved on the outside of the support ring 805, and the filling layer 808 can fill the gap inside the inner protective layer 4;

[0071] During the installation and laying process of the cable, the cable needs to be dragged and transported to the corresponding installation position. The staff will attach the upper installation arc plate 702 to the surface of the outer protective layer 6 from the top in advance, and the upper movable arc plate 713 will also be attached to the top of the outer protective layer 6, while the lower installation arc plate 703 will be tightly attached to the bottom of the surface of the outer protective layer 6, and the lower movable arc plate 714 will be attached to the bottom of the outer protective layer 6. The upper installation arc plate 702 and the lower installation arc plate 703 are spliced ​​and attached to each other, and are located on one side of the sliding slot 701, so that the upper movable arc plate 713 and the lower movable arc plate 714 correspond to the position of the sliding slot 701;

[0072] The upper fitting block 704 and the lower fitting block 705 fit together, and the locking bolt 706 is used to penetrate and fix the connection, so that the upper installation arc plate 702 and the lower installation arc plate 703 can be fit and fixed on the surface of the outer protective layer 6, and the arc-shaped card block 715 on the inner side of the upper movable arc plate 713 and the lower movable arc plate 714 is embedded in the sliding card groove 701, so that the upper installation arc plate 702 and the lower installation arc plate 703 will not slide and deviate from the outer protective layer 6 when they fit together, and the upper splicing frame 709 and the lower splicing frame 710 are spliced ​​with each other to wrap the rubber airbag 717, and the fixed block 716 at the bottom of the upper movable rod 722 and the fixed block 716 at the top of the lower movable rod 711 are pressed against the top and bottom of the rubber airbag 717 respectively, and the sealing block 721 is intercepted at both sides of the rubber airbag 717;

[0073] The mounting seat 707 and the roller 708 support the bottom of the cable, so that the outer protective layer 6 on the surface of the cable will not come into contact with the ground. The cable is pulled forward by the roller 708, which reduces the labor intensity of cable installation and saves more effort. The arc-shaped clamping block 715 is clamped in the sliding clamping groove 701, so that the relative position between the roller 708 and the cable remains unchanged, preventing the roller 708 from deviating and causing part of the cable to stick to the ground.

[0074] The cable installation environment is mostly covered with dirt and dust. During transportation and laying, dust and dirt will adhere to the surface of the cable. After the cable installation position is determined, the staff rotates the adjusting screw 719 to make the extrusion block 720 move inward to squeeze the rubber airbag 717. The edge of the rubber airbag 717 is limited by the sealing block 721, so that the top and bottom of the rubber airbag 717 expand and deform outward after being squeezed, and the upper movable rod 722 and the lower movable rod 711 are squeezed and pushed, so that the upper movable arc plate 713 rises and the lower movable arc plate 714 falls, away from the sliding slot 701, and the arc block 715 is no longer embedded in the sliding slot 701. Then the staff can pull the upper installation arc plate 702 and the lower installation arc plate 703 to slide along the surface of the outer protective layer 6. The upper installation arc plate 702 and the lower installation arc plate 703 are close to the surface of the outer protective layer 6. When sliding, the dust and impurities on the surface can be scraped off, which plays a cleaning role on the cable;

[0075] During the use of the cable, the core 1 is limited and supported by the triangular support block 801 and the limit strip 807, so that the cores 1 maintain a certain distance and are isolated from each other to prevent mutual influence. The core 1 will generate a certain amount of heat, and the heat-conducting metal strip 806 can absorb and transfer part of the heat to the outside to prevent the heat from surrounding the core 1 and affecting its normal transmission capacity. The positioning rod 802 and the triangular support block 801 improve the structural strength of the center of the cable and support and protect the core 1. The reinforcing metal wire 804 is staggered with the core 1 to protect the core 1 and improve the structural strength around the core 1, so that the core 1 will not break easily when under pressure, and the support ring 80 5 is a hard rubber ring, which surrounds the core body 1 for protection when subjected to external pressure to prevent the core body 1 from being directly squeezed by the external pressure. At the same time, the anti-breakage metal wires 811 and the metal springs 813 are staggered and surround the inside of the cable, thereby improving the compression resistance of the cable. After the cable surface is compressed, the metal springs 813 and the buffer strips 812 elastically buffer the pressure, while the anti-breakage metal wires 811 also provide support, thereby improving the anti-breakage performance of the cable, thereby preventing the cable from being broken after being compressed and causing the cable to be unable to be used normally. The cable center, the periphery of the core body 1 and the position close to the edge of the cable are protected and supported from three levels, so that the cable will not be easily damaged, thereby extending the service life of the cable.

[0076] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fracture-resistant low-voltage power cable, comprising three cores (1), characterized in that: The surfaces of the three cores (1) are all sleeved with a shielding layer (2), and the surface of the shielding layer (2) is wrapped with an insulating layer (3); An inner protective layer (4) is sleeved on the outer sides of the three core bodies (1); a heat-insulating layer (5) is sleeved on the surface of the inner protective layer (4); an outer protective layer (6) is sleeved on the outer side of the heat-insulating layer (5); a sliding protection mechanism (7) is installed on the surface of the outer protective layer (6); and a reinforcement anti-break mechanism (8) is embedded and installed on the inner side of the outer protective layer (6); The sliding protection mechanism (7) comprises a sliding slot (701); The surface of the outer protective layer (6) is provided with sliding grooves (701) at equal intervals, an upper installation arc plate (702) is fitted and installed on the top of the surface of the outer protective layer (6) at a position on one side of the sliding groove (701), and a lower installation arc plate (703) is fitted and installed on the bottom of the surface of the outer protective layer (6) at a position on one side of the sliding groove (701); The two ends of the bottom of the upper mounting arc plate (702) are symmetrically fixedly connected with upper fitting blocks (704), the two ends of the top of the lower mounting arc plate (703) are symmetrically fixedly connected with lower fitting blocks (705), and a locking bolt (706) is installed in the middle of the upper fitting block (704); A mounting seat (707) is fixedly mounted in the middle of the bottom end of the lower mounting arc plate (703), and a roller (708) is symmetrically mounted in the middle of the mounting seat (707).

2. A fracture-resistant low-voltage power cable according to claim 1, characterized in that: The upper mounting arc plate (702) and the lower mounting arc plate (703) are spliced ​​and bonded to each other, and the bottom end of the upper bonding block (704) and the top end of the lower bonding block (705) are bonded to each other; The locking bolt (706) movably passes through the upper fitting block (704) and the lower fitting block (705), and the locking bolt (706) locks and fixes the upper fitting block (704) and the lower fitting block (705).

3. The anti-fracture low-voltage power cable according to claim 1, characterized in that: One end of the upper fitting block (704) is fixedly connected to an upper splicing frame (709), one end of the lower fitting block (705) is fixedly connected to a lower splicing frame (710), an upper movable rod (722) is movably installed through the middle of the upper splicing frame (709), and a lower movable rod (711) is movably installed through the middle of the lower splicing frame (710); The top end of the upper movable rod (722) and the bottom end of the lower movable rod (711) are both fixedly connected with a connecting block (712), and an upper movable arc plate (713) is fixedly connected between the two connecting blocks (712) located at the top end of the upper movable rod (722); A lower movable arc plate (714) is fixedly connected between the two connecting blocks (712) at the bottom end of the lower movable rod (711), and arc-shaped clamping blocks (715) are fixedly installed in the middle of the inner walls of the upper movable arc plate (713) and the lower movable arc plate (714); The top end of the lower movable rod (711) and the bottom end of the upper movable rod (722) are both fixedly connected with a fixing block (716), and the bottom of the fixing block (716) located at the bottom end of the upper movable rod (722) is fixedly connected with a rubber airbag (717); One end of the upper splicing frame (709) is fixedly connected to a fixed vertical plate (718), an adjusting stud (719) is installed through the middle of the fixed vertical plate (718), the end of the adjusting stud (719) is fixedly connected to an extrusion block (720), and the two ends of the middle of the fixed vertical plate (718) are symmetrically fixedly connected to sealing blocks (721).

4. A fracture-resistant low-voltage power cable according to claim 3, characterized in that: The upper movable arc plate (713) and the lower movable arc plate (714) correspond to the positions of the sliding slot (701); the upper movable arc plate (713) and the lower movable arc plate (714) are respectively located above and below the sliding slot (701); and the arc-shaped block (715) is movably embedded in the interior of the sliding slot (701).

5. The anti-fracture low-voltage power cable according to claim 3, characterized in that: The adjusting stud (719) and the fixed vertical plate (718) are connected by threads, and the extrusion block (720) is closely attached to one end surface of the rubber airbag (717).

6. The anti-fracture low-voltage power cable according to claim 3, characterized in that: The upper splicing frame (709) and the lower splicing frame (710) are spliced ​​with each other, the rubber airbag (717) is located in the middle of the upper splicing frame (709) and the lower splicing frame (710), and the sealing block (721) is in contact with the edge of the rubber airbag (717).

7. The anti-fracture low-voltage power cable according to claim 3, characterized in that: The reinforcement and anti-breakage mechanism (8) comprises a triangular support block (801); A triangular support block (801) is fixedly installed in the middle of the inner side of the outer protective layer (6), a positioning rod (802) is installed through the middle of the triangular support block (801), and adhesive strips (803) are fixedly installed at the three ends of the triangular support block (801), and support rings (805) are equidistantly embedded in the inner side of the inner protective layer (4); The inner side of the support ring (805) is provided with reinforcing metal wires (804) equidistantly installed along the circumferential direction; the inner side of the support ring (805) is fixedly connected to a heat-conducting metal strip (806) at a position on one side of the reinforcing metal wire (804); the inner side of the heat-conducting metal strip (806) is fixedly connected to a limiting strip (807); and the inner side of the inner protective layer (4) is filled with a filling layer (808); The surface of the thermal insulation layer (5) is sleeved with a waterproof layer (809), the surface of the waterproof layer (809) is fixedly provided with positioning strips (810) equidistantly along the circumferential direction, the middle of the surface of the positioning strip (810) is embedded with an anti-break metal wire (811), the surface of the waterproof layer (809) is equidistantly provided with a buffer strip (812) at a position on one side of the positioning strip (810), and the surface of the buffer strip (812) is embedded with a metal spring sheet (813).

8. The anti-fracture low-voltage power cable according to claim 7, characterized in that: The triangular support block (801) is located in the middle of the three core bodies (1), the three core bodies (1) correspond to the three ends of the triangular support block (801), and the surface of the insulating layer (3) is tightly fitted with the adhesive strip (803).

9. The anti-fracture low-voltage power cable according to claim 7, characterized in that: The number of the reinforcing metal wires (804) and the limiting strips (807) is three, the three reinforcing metal wires (804) and the three core bodies (1) are equidistantly and staggeredly distributed, and the three limiting strips (807) are closely attached to the surfaces of the three core bodies (1), respectively.

10. The anti-fracture low-voltage power cable according to claim 7, characterized in that: The edge of the positioning strip (810) is in contact with the edge of the buffer strip (812); the metal spring pieces (813) and the anti-break metal wires (811) are equidistantly and staggeredly distributed; the inner wall of the outer protective layer (6) is provided with arc grooves at equal intervals; the top of the metal spring piece (813) is embedded in the arc groove.

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