Industrial low-smoke halogen-free fireproof low-voltage cable

Abstract

The invention discloses an industrial low-smoke halogen-free fireproof low-voltage cable, and relates to the technical field of low-voltage cables, an upper welding strip plate is fixedly mounted in the middle of the top end of an upper arc-shaped fitting block, and auxiliary stable supporting blocks are symmetrically mounted at the two ends of the top of the upper welding strip plate; arc-shaped anti-collision guide blocks are fixedly installed at the positions, located on the two sides of the auxiliary stable supporting block, of the two ends of the upper welding strip plate, a lower welding strip plate is fixedly installed in the middle of the bottom end of the lower arc-shaped attaching block, and trapezoidal limiting frames are symmetrically and fixedly installed at the bottom end of the lower welding strip plate. The labor intensity of carrying the cable is reduced, the placing stability of the laid cable is improved, the problems that the cable rolls and inclines to influence normal wiring or the cable rolls down from a high place to cause safety problems are solved, and after the cable slides down, a pulling pressure is generated at a wiring position to easily cause short circuit to cause a fire hazard; the cable placement stability is improved, and the cable use safety can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage cables, and particularly to an industrial low-smoke, halogen-free and fire-resistant low-voltage cable. Background Art

[0002] An industrial low-smoke, halogen-free and fire-resistant low-voltage cable is a cable designed specifically for industrial environments, mainly used in power transmission and control systems, especially in occasions where high safety and environmental protection requirements are needed. Its main characteristics include low smoke, halogen-free, flame retardant and fire resistant. Low smoke and halogen-free means that the cable skin uses halogen-free materials (such as polyolefin-based materials) and will not release toxic hydrogen halide gas when burning, while flame retardancy and fire resistance ensure that the cable can maintain a certain integrity and operating time in case of a fire; However, currently, when the cable is transported and moved, the skin of the cable rubs against the installation plane, which is likely to cause damage to the cable skin. The cable is relatively heavy, and the direct dragging labor intensity is large. Moreover, after the cable is placed and installed subsequently, it is likely to roll. When the cable is erected at a high place and falls, it will generate pressure on the connection and cause a short circuit situation. Therefore, the present invention provides an industrial low-smoke, halogen-free and fire-resistant low-voltage cable to meet people's needs. Summary of the Invention

[0003] The present invention provides an industrial low-smoke, halogen-free and fire-resistant low-voltage cable, which can effectively solve the problems proposed in the above background art that when the cable is transported and moved, the skin of the cable rubs against the installation plane, which is likely to cause damage to the cable skin, the cable is relatively heavy, the direct dragging labor intensity is large, and after the cable is placed and installed subsequently, it is likely to roll. When the cable is erected at a high place and falls, it will generate pressure on the connection and cause a short circuit situation.

[0004] To achieve the above object, the present invention provides the following technical solution: An industrial low-smoke, halogen-free and fire-resistant low-voltage cable includes three cores. A halogen-free and fire-resistant rubber sleeve is arranged on the surface of the core, and a convenient transportation and auxiliary stability mechanism is arranged on the surface of the halogen-free and fire-resistant rubber sleeve; The convenient transportation and auxiliary stability mechanism includes a limiting ring groove; A limiting ring groove is opened on the surface of the halogen-free and fire-resistant rubber sleeve. Semi-circular bonding layers are symmetrically and fittingly installed inside the limiting ring groove. Semi-circular wooden pressing blocks are fittingly installed on the surfaces of the two semi-circular bonding layers. An upper arc-shaped fitting block is fittingly installed on the top of the surfaces of the two semi-circular wooden pressing blocks, and a lower arc-shaped fitting block is fittingly installed on the bottom of the surfaces of the two semi-circular wooden pressing blocks; The middle of the top end of the upper arc-shaped fitting block is fixedly installed with an upper welding strip plate. At both ends of the top of the upper welding strip plate, auxiliary stable support blocks are symmetrically installed. At both ends of the upper welding strip plate, arc-shaped anti-collision guiding blocks are installed. The middle of the bottom end of the lower arc-shaped fitting block is fixedly installed with a lower welding strip plate. At both ends of the bottom of the lower welding strip plate, trapezoidal limiting frames are symmetrically installed. At the bottom of the two trapezoidal limiting frames, auxiliary transfer balls are embedded and clamped.

[0005] According to the above technical solution, the surfaces of the three cores are all extruded and wrapped with insulating layers. Shielding layers are sleeved on the surfaces of the three insulating layers. A halogen-free fire-resistant rubber sleeve is sleeved outside the three shielding layers; An outer rubber protection layer is fitted and installed on the inner wall of the halogen-free fire-resistant rubber sleeve. A heat insulation layer is fitted and installed on the inner wall of the outer rubber protection layer. An inner rubber protection layer is fixedly installed on the inner wall of the heat insulation layer; Locking screw holes are symmetrically opened in the middle of the surfaces of the two semi-circular wooden close-fitting blocks. Elastic telescopic strips are fixedly connected to both ends of the bottom of the upper arc-shaped fitting block and both ends of the top of the lower arc-shaped fitting block. Between the two elastic telescopic strips on the same side, spliced arc-shaped wooden long strips are fixedly installed. Inner hexagonal locking studs are symmetrically penetrated and installed in the middle of the two spliced arc-shaped wooden long strips.

[0006] According to the above technical solution, deflecting metal cylinders are symmetrically rotatably installed in the middle of the top end of the upper welding strip plate. Square limiting holes are opened at the top ends of the two deflecting metal cylinders. A left spliced long rod is fixedly connected to the middle of one deflecting metal cylinder. A limiting groove is opened at one end of the left spliced long rod. A right spliced long rod is fixedly connected to the middle of the other deflecting metal cylinder. Elastic limiting metal blocks are symmetrically fixedly connected to one end of the right spliced long rod. A limiting long plate is fitted and installed between the top ends of the two deflecting metal cylinders. Square magnetic blocks are symmetrically fixedly connected to both ends of the bottom of the limiting long plate.

[0007] According to the above technical solution, the ends of the two semi-circular wooden close-fitting blocks are mutually fitted, and the depth of the limiting ring groove is greater than the sum of the thicknesses of the semi-circular bonding layer and the semi-circular wooden close-fitting block; The lengths of the upper arc-shaped fitting block and the lower arc-shaped fitting block are the same as the length of the limiting ring groove.

[0008] According to the above technical solution, the two spliced arc-shaped wooden long strips correspond to the middle parts of the two semi-circular wooden close-fitting blocks. The positions of the inner hexagonal locking studs and the locking screw holes correspond to each other, and the end of the inner hexagonal locking stud is inserted into the inside of the locking screw hole; The upper arc-shaped fitting block, the lower arc-shaped fitting block, the four elastic telescopic strips and the two spliced arc-shaped wooden long strips are spliced and surrounded on the surfaces of the two semi-circular wooden close-fitting blocks.

[0009] According to the above technical solution, the length and width of the square limit hole and the square magnet are the same, and the square magnet is embedded inside the square limit hole.

[0010] According to the above technical solution, an auxiliary installation protection mechanism is provided on the inner side of the inner rubber protection layer; The auxiliary installation protection mechanism includes a central positioning shaft; A central positioning shaft is installed at the middle position inside the inner rubber protection layer. Arc-shaped positioning grooves are equidistantly arranged on the surface of the central positioning shaft along the circumferential direction. Outer limit card slots are equidistantly arranged on the surface of the central positioning shaft at a position on one side of the arc-shaped positioning grooves. Inner limit card slots are arranged inside the outer limit card slots. T-shaped limit long strips are equidistantly installed on the surface of the central positioning shaft along the circumferential direction. Arc-shaped splicing sealing strips are symmetrically and fixedly connected to both sides of the T-shaped limit long strips. Calabash-shaped limit rubber soft blocks are equidistantly fixedly connected to the middle of the T-shaped limit long strips; A shaping wrapping layer is fitted and installed on the inner wall of the inner rubber protection layer. Arc-shaped elastic protection silica gel strips are equidistantly embedded and installed inside the shaping wrapping layer along the circumferential direction. A metal compression-resistant strip is installed at a position on one side of the arc-shaped elastic protection silica gel strip inside the shaping wrapping layer. Metal connecting arc-shaped sheets are embedded and installed at positions corresponding to the arc-shaped elastic protection silica gel strips inside the shaping wrapping layer. Sealing fillers are filled inside the T-shaped limit long strips.

[0011] According to the above technical solution, the three cores are equidistantly arranged around the outside of the central positioning shaft. The three cores respectively correspond to the three arc-shaped positioning grooves. The shape after the outer limit card slot and the inner limit card slot are communicated is the same as the shape of the calabash-shaped limit rubber soft block. The calabash-shaped limit rubber soft block is movably embedded inside the outer limit card slot and the inner limit card slot.

[0012] According to the above technical solution, adjacent arc-shaped splicing sealing strips are mutually attached, and the inner wall of the arc-shaped splicing sealing strip is attached to the surface of the shielding layer.

[0013] According to the above technical solution, the arc-shaped elastic protection silica gel strip is located outside the T-shaped limit long strip, and the position of the metal compression-resistant strip corresponds to that of the core; The metal connecting arc-shaped sheet is attached to the surface of the arc-shaped elastic protection silica gel strip. The number of the arc-shaped elastic protection silica gel strips, the metal connecting arc-shaped sheets, and the metal compression-resistant strips is three. Both ends of the metal connecting arc-shaped sheet are connected to the edges of the adjacent two metal compression-resistant strips.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The structure of the present invention is scientific and reasonable, and it is safe and convenient to use: 1. A convenient transfer auxiliary stabilizing mechanism is provided. The use of auxiliary transfer balls can improve the flexibility of the cable itself, providing an auxiliary transfer function for cable transportation and installation, reducing the labor intensity of handling the cable. The auxiliary stable support block plays a role in supporting and stabilizing the cable, improving the stability of the cable placement after laying, preventing the cable from rolling and skewing, which may affect the normal wiring or cause safety problems such as the cable falling from a height. Moreover, when the cable slips, it will generate a pulling pressure on the connection point, which is likely to cause a short circuit and trigger a fire. Improving the cable placement stability can effectively improve the safety of cable use. After the auxiliary stable support block contacts the installation plane, it plays a role in positioning the three cores, keeping the three cores at a certain position at the cross-section, providing a certain auxiliary reference for the staff to identify the type of each core. At the same time, the upper arc-shaped fitting block and the lower arc-shaped fitting block can rotate around the surface of the two semi-circular wooden close-fitting blocks, which is convenient for the staff to adjust the positions of the auxiliary transfer balls and the auxiliary stable support blocks. During mobile transportation and installation placement, the auxiliary transfer balls and the auxiliary stable support blocks can be adjusted to contact the ground. Moreover, the inner hexagon locking stud and the locking screw hole can be used in cooperation to fix the spliced arc-shaped wooden strip and the semi-circular wooden close-fitting block to each other, making the auxiliary transfer balls and the auxiliary stable support blocks more stable after adjustment.

[0015] 2. The arc-shaped anti-collision guide blocks are distributed on both sides of the auxiliary stable support block. When rotating and adjusting the upper arc-shaped fitting block, the arc-shaped anti-collision guide blocks can first contact the installation plane, providing a certain guiding function for the rotation process, preventing the auxiliary stable support block from directly contacting and colliding with the installation plane, which may cause the cable to shake. The arc-shaped anti-collision guide blocks improve the stability of the adjustment process.

[0016] 3. The semi-circular wooden close-fitting block provides a certain guiding function for the rotation of the upper arc-shaped fitting block and the lower arc-shaped fitting block, and the inner hexagon locking stud can be smoothly fixed to it without damaging the internal components of the cable. The elastic telescopic strip's own elastic telescopic property provides certain convenience for sleeving on the surface of the semi-circular wooden close-fitting block. Moreover, the inner walls of the upper arc-shaped fitting block and the lower arc-shaped fitting block are embedded in the internal limit ring grooves, improving the installation stability and preventing the positions of the upper arc-shaped fitting block and the lower arc-shaped fitting block from shifting, which may affect the overall stability of the cable.

[0017] 4. The left splicing long rod and the right splicing long rod on the surfaces of adjacent cables correspond to each other, and the elastic limit metal block is embedded in the limit groove, improving the connection strength between adjacent cables, making adjacent cables stable when placed close to each other, and also playing a role in limiting the placement of adjacent cables, making adjacent cables placed neatly and maintaining a consistent distance from each other. At the same time, by embedding the square magnetic block into the square limit hole, the deflection metal cylinder can be limited and stabilized to prevent it from still shaking and shifting after its position is adjusted.

[0018] 5. An auxiliary installation protection mechanism is provided. The central positioning shaft and the arc-shaped positioning groove are used to position and install the core body, so that the core bodies maintain the same spacing from each other. At the same time, the T-shaped limiting strip is used to surround the outside, and the arc-shaped splicing sealing strips are mutually attached, which plays a role in pressing and stabilizing the core body, and improves the stability of the core body during cable production; The positions of the gourd-shaped limiting rubber soft blocks are limited by the outer limiting card slot and the inner limiting card slot. When the gourd-shaped limiting rubber soft blocks are installed and limited, there are two stages, which also play a role in stabilizing the T-shaped limiting strip and the arc-shaped splicing sealing strips in two stages. In the first stage, the T-shaped limiting strip and the arc-shaped splicing sealing strips are initially clamped on the central positioning shaft, and there is a large space between them to provide space for the installation of the core body. In the second stage, the T-shaped limiting strip and the arc-shaped splicing sealing strips move further towards the central positioning shaft to press and stabilize the core body. The arc-shaped splicing sealing strips are mutually spliced and sealed. The two stages are carried out in sequence, which can effectively install and tightly press and fix the core body, and prevent the relative spacing between the core bodies from changing and making mistakes due to the skew of the core body during the cable production process, which affects the normal use of the cable.

[0019] 6. The shaping wrapping layer and the arc-shaped elastic protection silica gel strip are used to surround the surfaces of the T-shaped limiting strip and the arc-shaped splicing sealing strip, which play a role in buffering and protecting the cable core body, preventing the T-shaped limiting strip from being squeezed and damaged, relieving and absorbing the pressure generated by the external extrusion of the cable, reducing the pressure on the core body, and fully maintaining the integrity and normal use of the cable core body. At the same time, the metal compression strip improves the overall structural strength of the cable and plays a certain role in preventing cutting. The metal connecting arc-shaped piece decomposes the pressure received by the metal compression strip, and can resist the pressure through the tensile force, improving the internal stability of the cable.

[0020] In summary, by combining the convenient transfer auxiliary stability mechanism and the auxiliary installation protection mechanism, the cable is protected from the inside and the outside respectively. The outside is to support and protect the cable after installation and connection, improve the stability of the cable, reduce the pressure on the connection, prevent the cable from rolling and sliding into a suspended state, causing the cable connection to be pulled down by gravity and break, and improve the safety of cable use. The inside is to protect the core body inside the cable, buffer and isolate the external pressure, prevent the pressure from acting on the core body and causing damage to the core body, which affects the use of the cable. Multiple protections make the cable have good self-strength and stability after installation, and the use is more convenient. Brief Description of the Drawings

[0021] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention.

[0022] In the accompanying drawings: Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic cross-sectional view of the cable of the present invention; Figure 3 is a schematic installation structure diagram of the auxiliary transfer ball of the present invention; Figure 4 is a schematic installation structure diagram of the spliced arc-shaped wooden strip of the present invention; Figure 5 is a schematic structural diagram of the convenient transfer auxiliary stabilizing mechanism of the present invention; Figure 6 is a schematic installation structure diagram of the left spliced long rod of the present invention; Figure 7 is the present invention Figure 6 an enlarged schematic view of area A in; Figure 8 is a schematic installation structure diagram of the semi-circular wooden close-fitting block of the present invention; Figure 9 is a schematic installation structure diagram of the metal connecting arc-shaped sheet of the present invention; Figure 10 is a schematic installation structure diagram of the central positioning shaft of the present invention; Figure 11 is a schematic structural diagram of the auxiliary installation protection mechanism of the present invention; Reference numerals in the figure: 1, core body; 2, insulating layer; 3, shielding layer; 4, inner rubber protection layer; 5, heat insulation layer; 6, outer rubber protection layer; 7, halogen-free fire-resistant rubber sleeve; 8, convenient transfer auxiliary stabilizing mechanism; 801, limit ring groove; 802, semi-circular bonding layer; 803, semi-circular wooden close-fitting block; 804, locking screw hole; 805, upper arc-shaped fitting block; 806, lower arc-shaped fitting block; 807, elastic telescopic strip; 808, spliced arc-shaped wooden strip; 809, inner hexagon locking stud; 810, upper welding strip plate; 811, auxiliary stabilizing support block; 812, arc-shaped anti-collision guide block; 813, lower welding strip plate; 814, trapezoidal limit frame; 815, auxiliary transfer ball; 816, deflecting metal cylinder; 817, square limit hole; 818, left spliced long rod; 819, limit groove; 820, right spliced long rod; 821, elastic limit metal block; 822, limit long plate; 823, square magnet; 9. Auxiliary installation protection mechanism; 901. Central positioning shaft; 902. Arc-shaped positioning groove; 903. Outer limit card slot; 904. Inner limit card slot; 905. T-shaped limit strip; 906. Arc-shaped splicing sealing strip; 907. Gourd-shaped limit rubber soft block; 908. Shaping wrapping layer; 909. Arc-shaped elastic protection silica gel strip; 910. Metal compression strip; 911. Metal connecting arc-shaped piece; 912. Sealing filler. Detailed implementation mode

[0023] The following is a description of the preferred embodiments of the present invention 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.

[0024] Embodiment: As Figures 1-11 shown, the present invention provides a technical solution, an industrial low-smoke, halogen-free, fire-resistant and low-voltage cable, including three cores 1. The surfaces of the three cores 1 are all extruded and wrapped with an insulating layer 2. The insulating layer 2 is made of insulating rubber by extrusion. The surfaces of the three insulating layers 2 are all sleeved and installed with a shielding layer 3. The shielding layer 3 is wrapped with an aluminum-plastic composite tape shielding material. The outside of the three shielding layers 3 is sleeved with a halogen-free fire-resistant rubber sleeve 7. The halogen-free fire-resistant rubber sleeve 7 is made of halogen-free polyolefin-based rubber by extrusion. The surface of the halogen-free fire-resistant rubber sleeve 7 is provided with a convenient transfer auxiliary stability mechanism 8; The convenient transfer auxiliary stability mechanism 8 includes a limit ring groove 801, a semi-circular bonding layer 802, a semi-circular wooden close-fitting block 803, a locking screw hole 804, an upper arc-shaped fitting block 805, a lower arc-shaped fitting block 806, an elastic telescopic strip 807, a spliced arc-shaped wooden strip 808, an inner hexagon locking screw 809, an upper welding strip plate 810, an auxiliary stability support block 811, an arc-shaped anti-collision guide block 812, a lower welding strip plate 813, a trapezoidal limit frame 814, an auxiliary transfer ball 815, a deflecting metal cylinder 816, a square limit hole 817, a left spliced long rod 818, a limit groove 819, a right spliced long rod 820, an elastic limit metal block 821, a limit long plate 822 and a square magnet 823; A limit ring groove 801 is opened on the surface of the halogen-free fire-resistant rubber sleeve 7. The inner part of the limit ring groove 801 is symmetrically and fittingly installed with a semi-circular bonding layer 802. The surfaces of the two semi-circular bonding layers 802 are both fittingly installed with a semi-circular wooden close-fitting block 803. The top surface of the two semi-circular wooden close-fitting blocks 803 is fittingly installed with an upper arc-shaped fitting block 805. The bottom surface of the two semi-circular wooden close-fitting blocks 803 is fittingly installed with a lower arc-shaped fitting block 806. The ends of the two semi-circular wooden close-fitting blocks 803 are mutually fitted. The depth of the limit ring groove 801 is greater than the sum of the thicknesses of the semi-circular bonding layer 802 and the semi-circular wooden close-fitting block 803. The lengths of the upper arc-shaped fitting block 805 and the lower arc-shaped fitting block 806 are the same as the length of the limit ring groove 801; At the middle of the top end of the upper arc-shaped fitting block 805, an upper welding strip plate 810 is fixedly installed. At both ends of the top of the upper welding strip plate 810, auxiliary stable support blocks 811 are symmetrically installed. At both sides of the auxiliary stable support blocks 811 at both ends of the upper welding strip plate 810, arc-shaped anti-collision guiding blocks 812 are fixedly installed. At the middle of the bottom end of the lower arc-shaped fitting block 806, a lower welding strip plate 813 is fixedly installed. At the bottom end of the lower welding strip plate 813, trapezoidal limiting frames 814 are symmetrically and fixedly installed. An auxiliary transfer rolling ball 815 is embedded and clamped at the bottom of the two trapezoidal limiting frames 814. The use of the auxiliary transfer rolling ball 815 can improve the flexibility of the cable itself, provide an auxiliary transfer function for the cable transportation and installation, and reduce the labor intensity of carrying the cable. The auxiliary stable support block 811 plays a role in supporting and stabilizing the cable, improves the stability of the cable placement after laying, prevents the cable from rolling and skewing, which may affect the normal wiring or cause safety problems due to the cable rolling down from a height. Moreover, when the cable slips, it will generate a pulling pressure on the connection point, which is likely to cause a short circuit and trigger a fire. Improving the cable placement stability can effectively improve the cable use safety. After the auxiliary stable support block 811 contacts the installation plane, it plays a role in positioning the three cores 1, so that the three cores 1 at the cross-section maintain a certain position, providing a certain auxiliary reference function for the staff to identify the type of each core 1; At the same time, the upper arc-shaped fitting block 805 and the lower arc-shaped fitting block 806 can rotate around the surfaces of the two semi-circular wooden close-fitting blocks 803, which is convenient for the staff to adjust the positions of the auxiliary transfer rolling ball 815 and the auxiliary stable support block 811, and adjust the auxiliary transfer rolling ball 815 and the auxiliary stable support block 811 to contact the ground during the mobile transportation and installation placement respectively. Moreover, the inner hexagon locking stud 809 and the locking screw hole 804 can be used in cooperation to fix the spliced arc-shaped wooden strip 808 and the semi-circular wooden close-fitting block 803 to each other, making the adjustment of the auxiliary transfer rolling ball 815 and the auxiliary stable support block 811 more stable; With the arc-shaped anti-collision guiding blocks 812 distributed on both sides of the auxiliary stable support block 811, when rotating and adjusting the upper arc-shaped fitting block 805, the arc-shaped anti-collision guiding blocks 812 can first contact the installation plane, providing a certain guiding function for the rotation process, preventing the auxiliary stable support block 811 from directly contacting and colliding with the installation plane, which may cause the cable to shake. The arc-shaped anti-collision guiding blocks 812 improve the stability of the adjustment process; The semi-circular wooden pressing block 803 provides a certain guiding effect for the rotation of the upper arc-shaped fitting block 805 and the lower arc-shaped fitting block 806, and the inner hexagon locking stud 809 can be fixed to it smoothly without damaging the internal components of the cable. The elastic telescopic strip 807 provides certain convenience for sleeving on the surface of the semi-circular wooden pressing block 803. The inner walls of the upper arc-shaped fitting block 805 and the lower arc-shaped fitting block 806 are embedded in the limiting ring groove 801, which improves the installation stability and prevents the position deviation of the upper arc-shaped fitting block 805 and the lower arc-shaped fitting block 806 from affecting the overall stability of the cable; The outer rubber protection layer 6 is fitted and installed on the inner wall of the halogen-free fire-resistant rubber sleeve 7, the heat insulation layer 5 is fitted and installed on the inner wall of the outer rubber protection layer 6. The heat insulation layer 5 is made of ceramicized silicone rubber. The inner rubber protection layer 4 is fixedly installed on the inner wall of the heat insulation layer 5. Both the inner rubber protection layer 4 and the outer rubber protection layer 6 are made by extrusion of high-temperature-resistant rubber. When the halogen-free fire-resistant rubber sleeve 7 is ignited by an external fire source, it will not release hydrogen halide gas and has less soot. The high-temperature-resistant characteristics of the outer rubber protection layer 6 and the inner rubber protection layer 4 improve the fire-resistant and heat-resistant ability of the cable. The heat insulation layer 5 can effectively isolate the external heat and prevent a large amount of heat from affecting the core body 1; Locking screw holes 804 are symmetrically opened in the middle of the surfaces of the two semi-circular wooden pressing blocks 803. Elastic telescopic strips 807 are fixedly connected to both ends of the bottom of the upper arc-shaped fitting block 805 and both ends of the top of the lower arc-shaped fitting block 806. A spliced arc-shaped wooden strip 808 is fixedly installed between the two elastic telescopic strips 807 on the same side. Inner hexagon locking studs 809 are symmetrically penetrated and installed in the middle of the two spliced arc-shaped wooden strips 808. The two spliced arc-shaped wooden strips 808 correspond to the middle parts of the two semi-circular wooden pressing blocks 803. The positions of the inner hexagon locking studs 809 and the locking screw holes 804 correspond to each other. The end of the inner hexagon locking stud 809 is inserted into the inside of the locking screw hole 804. The upper arc-shaped fitting block 805, the lower arc-shaped fitting block 806, the four elastic telescopic strips 807 and the two spliced arc-shaped wooden strips 808 are spliced and surrounded on the surface of the two semi-circular wooden pressing blocks 803; At the middle of the top end of the upper welding strip plate 810, a deflecting metal cylinder 816 is symmetrically and rotatably installed. Square limiting holes 817 are formed at the top ends of the two deflecting metal cylinders 816. A left splicing long rod 818 is fixedly connected to the middle of one deflecting metal cylinder 816. A limiting groove 819 is formed at one end of the left splicing long rod 818. A right splicing long rod 820 is fixedly connected to the middle of the other deflecting metal cylinder 816. Elastic limiting metal blocks 821 are symmetrically and fixedly connected to one end of the right splicing long rod 820. A limiting long plate 822 is fitted and installed between the top ends of the two deflecting metal cylinders 816. Square magnets 823 are symmetrically and fixedly connected to the two ends of the bottom of the limiting long plate 822. The length and width of the square limiting holes 817 and the square magnets 823 are the same. The square magnets 823 are embedded into the inside of the square limiting holes 817. By making the left splicing long rod 818 and the right splicing long rod 820 on the surfaces of adjacent cables correspond to each other, and embedding the elastic limiting metal blocks 821 into the limiting grooves 819, the connection strength between adjacent cables is improved, so that when adjacent cables are placed close to each other, they are stable with each other, and it also plays a certain role in limiting the placement of adjacent cables, making the adjacent cables placed neatly and the distance between them consistent. At the same time, by embedding the square magnets 823 into the inside of the square limiting holes 817, the deflecting metal cylinders 816 can be limited and stabilized to prevent them from still shaking and shifting after their positions are adjusted; An auxiliary installation protection mechanism 9 is arranged on the inner side of the inner rubber protection layer 4; The auxiliary installation protection mechanism 9 includes a central positioning shaft 901, an arc-shaped positioning groove 902, an outer limiting card slot 903, an inner limiting card slot 904, a T-shaped limiting long strip 905, an arc-shaped splicing sealing strip 906, a gourd-shaped limiting rubber soft block 907, a shaping wrapping layer 908, an arc-shaped elastic protection silica gel strip 909, a metal compression strip 910, a metal connecting arc-shaped piece 911 and a sealing filler 912; A central positioning shaft 901 is installed at the middle position inside the inner rubber protection layer 4. Arc-shaped positioning grooves 902 are equidistantly arranged on the surface of the central positioning shaft 901 along the circumferential direction. Outer limit card slots 903 are equidistantly arranged on the surface of the central positioning shaft 901 at a position on one side of the arc-shaped positioning grooves 902. Inner limit card slots 904 are arranged inside the outer limit card slots 903. T-shaped limit long strips 905 are equidistantly installed on the surface of the central positioning shaft 901 along the circumferential direction. Arc-shaped splicing sealing strips 906 are symmetrically and fixedly connected to both sides of the T-shaped limit long strips 905. Gourd-shaped limit rubber soft blocks 907 are equidistantly and fixedly connected to the middle of the T-shaped limit long strips 905. Three cores 1 are equidistantly surrounded outside the central positioning shaft 901. The three cores 1 respectively correspond to the three arc-shaped positioning grooves 902. The shape after the outer limit card slots 903 and the inner limit card slots 904 are communicated is the same as the shape of the gourd-shaped limit rubber soft block 907. The gourd-shaped limit rubber soft block 907 is movably embedded inside the outer limit card slots 903 and the inner limit card slots 904. The adjacent arc-shaped splicing sealing strips 906 are mutually attached. The inner wall of the arc-shaped splicing sealing strip 906 is attached to the surface of the shielding layer 3. The central positioning shaft 901 and the arc-shaped positioning grooves 902 play a role in positioning and installing the core 1, enabling the cores 1 to maintain the same distance from each other. At the same time, the T-shaped limit long strips 905 are surrounded on the outside, and the arc-shaped splicing sealing strips 906 are mutually attached, playing a role in pressing and stabilizing the core 1, improving the stability of the core 1 during cable production; The position of the gourd-shaped limit rubber soft block 907 is limited by the outer limit card slots 903 and the inner limit card slots 904, so that there are two stages when the gourd-shaped limit rubber soft block 907 is installed and limited, and it also plays a role in stabilizing the T-shaped limit long strips 905 and the arc-shaped splicing sealing strips 906 in two stages. In the first stage, the T-shaped limit long strips 905 and the arc-shaped splicing sealing strips 906 are initially clamped on the central positioning shaft 901, and there is a large space between them and the central positioning shaft 901 for the installation of the core 1. In the second stage, the T-shaped limit long strips 905 and the arc-shaped splicing sealing strips 906 move further towards the central positioning shaft 901 to press and stabilize the core 1. The arc-shaped splicing sealing strips 906 are mutually spliced and sealed. The two stages are carried out in sequence, which can effectively install and tightly press and fix the core 1, preventing the relative distance between the cores 1 from changing and making mistakes due to the skewing of the core 1 during the cable production process, which affects the normal use of the cable; An inner rubber protection layer 4 is fitted and installed with a shaping wrapping layer 908 on its inner wall. Arc-shaped elastic protection silica gel strips 909 are equidistantly embedded and installed inside the shaping wrapping layer 908 along the circumferential direction. A metal compression bar 910 is installed at a position on one side of the arc-shaped elastic protection silica gel strips 909 inside the shaping wrapping layer 908. Metal connecting arc-shaped pieces 911 are embedded and installed at positions corresponding to the arc-shaped elastic protection silica gel strips 909 inside the shaping wrapping layer 908. The inner side of the T-shaped limiting long strip 905 is filled with a sealing filler 912. The arc-shaped elastic protection silica gel strips 909 are located outside the T-shaped limiting long strip 905. The metal compression bar 910 corresponds to the position of the core body 1. The metal connecting arc-shaped pieces 911 are attached to the surface of the arc-shaped elastic protection silica gel strips 909. The number of the arc-shaped elastic protection silica gel strips 909, the metal connecting arc-shaped pieces 911 and the metal compression bars 910 is three. Both ends of the metal connecting arc-shaped pieces 911 are connected to the edges of the adjacent two metal compression bars 910. The shaping wrapping layer 908 and the arc-shaped elastic protection silica gel strips 909 surround the surface of the T-shaped limiting long strip 905 and the arc-shaped splicing sealing strip 906, playing a role of buffering and protecting the cable core body 1, preventing the T-shaped limiting long strip 905 from being squeezed and damaged, relieving and absorbing the pressure generated by the external extrusion of the cable, reducing the pressure on the core body 1, and fully maintaining the integrity and normal use of the cable core body 1. At the same time, the metal compression bar 910 improves the overall structural strength of the cable, playing a certain role in preventing cutting. The metal connecting arc-shaped pieces 911 decompose the pressure received by the metal compression bar 910 and can resist the pressure through tension, improving the internal stability of the cable.

[0025] The working principle and usage process of the present invention: First, during the production of the cable, three T-shaped limiting long strips 905 are equidistantly wound around the outer side of the central positioning shaft 901, and the gourd-shaped limiting rubber soft blocks 907 correspond to the outer limiting card slots 903. The gourd-shaped limiting rubber soft blocks 907 are soft. The gourd-shaped limiting rubber soft blocks 907 are inserted into the inside of the outer limiting card slots 903, thereby playing a role of positioning and stabilizing the T-shaped limiting long strips 905 and the arc-shaped splicing sealing strips 906 in the first stage. At this time, the T-shaped limiting long strips 905 are clamped on the outer side of the central positioning shaft 901, and a certain distance is maintained between the adjacent arc-shaped splicing sealing strips 906, so that a certain space is left between the T-shaped limiting long strips 905 and the central positioning shaft 901. The three core bodies 1 can be smoothly inserted into this space and correspond to the positions of the arc-shaped positioning grooves 902, playing a role of preliminary limiting and installing the core bodies 1. Then, the T-shaped limiting strip 905 is squeezed inward, and the end of the gourd-shaped limiting rubber soft block 907 is pushed into the inner limiting card slot 904, playing a role in positioning and installing the T-shaped limiting strip 905 in the second stage. The arc-shaped splicing sealing strips 906 at both ends of adjacent T-shaped limiting strips 905 come into contact with each other and are spliced, playing a role in pressing and fixing the core body 1. One end of the shielding layer 3 outside the core body 1 contacts the inner wall of the arc-shaped splicing sealing strip 906, and the other end is embedded in the arc-shaped positioning groove 902. The gap inside the T-shaped limiting strip 905 is filled with the sealing filler 912; The shaping and wrapping layer 908 tightly wraps the surfaces of the T-shaped limiting strip 905 and the arc-shaped splicing sealing strip 906. The arc-shaped elastic protection silicone strip 909 inside the shaping and wrapping layer 908 corresponds to the position of the T-shaped limiting strip 905, and the metal compressive strip 910 corresponds to the position where the core body 1 is located. Then, the inner rubber protection layer 4 is sleeved on the surface of the shaping and wrapping layer 908, and the heat insulation layer 5, the outer rubber protection layer 6, and the halogen-free fire-resistant rubber sleeve 7 are sequentially sleeved and extruded; The surface of the halogen-free fire-resistant rubber sleeve 7 is equidistantly provided with limiting ring grooves 801. The surface and inner wall of the semi-circular bonding layer 802 are coated with an adhesive so that it can fit inside the limiting ring grooves 801. The semi-circular wooden close-fitting block 803 can also fit on its surface, and the two semi-circular wooden close-fitting blocks 803 are spliced to form a circle. The upper arc-shaped fitting block 805 and the lower arc-shaped fitting block 806 are fixedly connected by an elastic telescopic strip 807 and a spliced arc-shaped wooden strip 808. Using the elastic telescopic ability of the elastic telescopic strip 807 itself, the staff sleeved it on the surface of the two semi-circular wooden close-fitting blocks 803. The inner hexagon locking stud 809 corresponds to the locking screw hole 804, and the spliced arc-shaped wooden strip 808 and the semi-circular wooden close-fitting block 803 can be locked and fixed by using the inner hexagon locking stud 809; When the cable is transported and installed in a mobile manner, it is necessary to drag and lay the entire cable. The auxiliary transfer ball 815 is brought into contact with the installation plane, so that the cable skin is far from the installation plane. With the help of the auxiliary transfer ball 815, the staff can more easily drag the cable to the predetermined position and reduce the wear of the cable skin. After determining the position, the hexagon socket head locking stud 809 can be screwed outwards, and the semi-circular wooden pressing block 803 is no longer locked. At this time, the upper arc-shaped fitting block 805 and the lower arc-shaped fitting block 806 lose their limits and can rotate 180 degrees around the surface of the semi-circular wooden pressing block 803. The auxiliary transfer ball 815 is moved to the upper side, and the auxiliary stable support block 811 rotates and moves to the lower side. During the rotation, the arc-shaped anti-collision guide block 812 plays a guiding role to prevent the auxiliary stable support block 811 from directly colliding with the ground. The auxiliary stable support block 811 plays a role in supporting and stabilizing the cable, so that the cable will not roll easily and reduce the risk of rolling from a high installation position (such as on a bridge). After rotating 180 degrees, the hexagon socket head locking stud 809 can correspond to the locking screw hole 804 again, and then the hexagon socket head locking stud 809 can be used for locking and fixing again; When the cable is moved or placed, the square magnet 823 is inserted into the square limiting hole 817, which plays a limiting role on the left splicing long rod 818 and the right splicing long rod 820, so that they will not shake easily when the cable is moved. If cables need to be installed and placed side by side, the limiting long plate 822 and the square magnet 823 can be pushed downwards, so that the square magnet 823 is separated from the inside of the square limiting hole 817. Then the left splicing long rod 818 and the right splicing long rod 820 can rotate 90 degrees outwards through the deflecting metal cylinder 816. Between adjacent cables, the left splicing long rod 818 at the bottom of one cable corresponds to the right splicing long rod 820 of another cable. The elastic limiting metal block 821 is inserted into the limiting groove 819 for limiting and clamping, so that the left splicing long rod 818 and the right splicing long rod 820 are spliced with each other, improving the connection strength between adjacent cables, keeping a certain distance between adjacent cables all the time, making the cable arrangement more neat, and preventing the cables from being wound and confused, which affects subsequent maintenance. After the deflecting metal cylinder 816 rotates 90 degrees, the shape and direction of the square limiting hole 817 do not change, and then the limiting long plate 822 and the square magnet 823 can be used to lock and fix the deflecting metal cylinder 816 again; During the use of the cable, if it is squeezed by external pressure, the arc-shaped elastic protective silica gel strip 909 plays a buffering role to absorb the external pressure. The T-shaped limiting long strip 905 and the arc-shaped splicing sealing strip 906 also play a role of surrounding protection to prevent the core body 1 from being squeezed and deformed. The metal compression bar 910 improves the anti-fracture property of the cable. After being pressed, the force is dispersed through the metal connecting arc-shaped piece 911, improving the stability of the internal structure of the cable.

[0026] Finally, it should be noted that the above are only preferred examples of the present invention and are not used to limit the present invention. Although the present invention 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An industrial low-smoke, halogen-free and fire-resistant low-voltage cable, comprising three cores (1), characterized in that: The surface of the core body (1) is provided with a halogen-free fire-resistant rubber sleeve (7), and the surface of the halogen-free fire-resistant rubber sleeve (7) is provided with a convenient transportation auxiliary stability mechanism (8); The convenient transportation auxiliary stability mechanism (8) includes a limit ring groove (801); The surface of the halogen-free fire-resistant rubber sleeve (7) is provided with a limit ring groove (801). Symmetrically bonded and installed inside the limit ring groove (801) are semi-circular bonding layers (802). The surfaces of the two semi-circular bonding layers (802) are both bonded and installed with semi-circular wooden close-fitting blocks (803). The top of the surfaces of the two semi-circular wooden close-fitting blocks (803) is bonded and installed with an upper arc-shaped fitting block (805), and the bottom of the surfaces of the two semi-circular wooden close-fitting blocks (803) is bonded and installed with a lower arc-shaped fitting block (806); The middle of the top end of the upper arc-shaped fitting block (805) is fixedly installed with an upper welding strip plate (810). At both ends of the top of the upper welding strip plate (810), auxiliary stability support blocks (811) are symmetrically installed. At both ends of the upper welding strip plate (810), arc-shaped anti-collision guiding blocks (812) are installed. The middle of the bottom end of the lower arc-shaped fitting block (806) is fixedly installed with a lower welding strip plate (813). At both ends of the bottom of the lower welding strip plate (813), trapezoidal limit frames (814) are symmetrically installed. The bottom of the two trapezoidal limit frames (814) is embedded and clamped with auxiliary transfer balls (815).

2. The low-smoke halogen-free fire-resistant low-voltage cable for industry according to claim 1, characterized in that, The surfaces of the three core bodies (1) are all extrusion-wrapped with insulating layers (2). The surfaces of the three insulating layers (2) are all sleeved with shielding layers (3). The outside of the three shielding layers (3) is sleeved with a halogen-free fire-resistant rubber sleeve (7); The inner wall of the halogen-free fire-resistant rubber sleeve (7) is bonded and installed with an outer rubber protection layer (6). The inner wall of the outer rubber protection layer (6) is bonded and installed with a heat insulation layer (5). The inner wall of the heat insulation layer (5) is fixedly installed with an inner rubber protection layer (4); Locking screw holes (804) are symmetrically opened in the middle of the surfaces of the two semi-circular wooden close-fitting blocks (803). Elastic telescopic strips (807) are fixedly connected to both ends of the bottom of the upper arc-shaped fitting block (805) and both ends of the top of the lower arc-shaped fitting block (806). Between the two elastic telescopic strips (807) on the same side, splicing arc-shaped wooden long strips (808) are fixedly installed. Inner hexagonal locking studs (809) are symmetrically penetrated and installed in the middle of the two splicing arc-shaped wooden long strips (808).

3. The low-smoke, halogen-free, fire-resistant and low-voltage industrial cable according to claim 2, characterized in that, At the middle of the top end of the upper welding strip plate (810), deflection metal cylinders (816) are symmetrically and rotatably installed. Square limiting holes (817) are formed at the top ends of the two deflection metal cylinders (816). A left splicing long rod (818) is fixedly connected to the middle of one of the deflection metal cylinders (816). A limiting groove (819) is formed at one end of the left splicing long rod (818). A right splicing long rod (820) is fixedly connected to the middle of the other deflection metal cylinder (816). Elastic limiting metal blocks (821) are symmetrically and fixedly connected to one end of the right splicing long rod (820). A limiting long plate (822) is fitted and installed between the top ends of the two deflection metal cylinders (816). Square magnetic blocks (823) are symmetrically and fixedly connected to the two ends of the bottom of the limiting long plate (822).

4. An industrial low-smoke, halogen-free and fire-resistant low-voltage cable according to claim 1, characterized in that, The ends of the two semi-circular wooden close-fitting blocks (803) are in mutual contact. The depth of the limiting ring groove (801) is greater than the sum of the thicknesses of the semi-circular bonding layer (802) and the semi-circular wooden close-fitting blocks (803). The lengths of the upper arc-shaped fitting block (805) and the lower arc-shaped fitting block (806) are the same as the length of the limiting ring groove (801).

5. An industrial low-smoke, halogen-free and fire-resistant low-voltage cable according to claim 2, characterized in that, The two splicing arc-shaped wooden strips (808) correspond to the middle parts of the two semi-circular wooden close-fitting blocks (803). The positions of the internal hexagonal locking studs (809) and the locking screw holes (804) correspond to each other. The end of the internal hexagonal locking stud (809) is inserted into the inside of the locking screw hole (804). The upper arc-shaped fitting block (805), the lower arc-shaped fitting block (806), the four elastic telescopic strips (807) and the two splicing arc-shaped wooden strips (808) are spliced and surrounded on the surface of the two semi-circular wooden close-fitting blocks (803).

6. The low-smoke, halogen-free, fire-resistant and low-voltage industrial cable according to claim 3, wherein The lengths and widths of the square limiting holes (817) and the square magnetic blocks (823) are the same. The square magnetic blocks (823) are embedded into the inside of the square limiting holes (817).

7. An industrial low-smoke, halogen-free and fire-resistant low-voltage cable according to claim 3, characterized in that, An auxiliary installation protection mechanism (9) is arranged on the inner side of the inner rubber protection layer (4). The auxiliary installation protection mechanism (9) includes a central positioning shaft (901). A central positioning shaft (901) is installed at the middle position inside the inner rubber protection layer (4). Arc-shaped positioning grooves (902) are equidistantly formed on the surface of the central positioning shaft (901) along the circumferential direction. Outer limiting card slots (903) are equidistantly formed on the surface of the central positioning shaft (901) at a position on one side of the arc-shaped positioning grooves (902). Inner limiting card slots (904) are formed inside the outer limiting card slots (903). T-shaped limiting long strips (905) are equidistantly installed on the surface of the central positioning shaft (901) along the circumferential direction. Arc-shaped splicing sealing strips (906) are symmetrically and fixedly connected to the two side parts of the T-shaped limiting long strips (905). Calabash-shaped limiting rubber soft blocks (907) are equidistantly fixedly connected to the middle parts of the T-shaped limiting long strips (905). The inner wall of the inner rubber protection layer (4) is fitted with a shaping wrapping layer (908). The shaping wrapping layer (908) is internally embedded with arc-shaped elastic protection silica gel strips (909) at equal intervals along the circumferential direction. A metal compression-resistant strip (910) is installed at a position on one side of the arc-shaped elastic protection silica gel strips (909) inside the shaping wrapping layer (908). Metal connecting arc-shaped sheets (911) are embedded at positions corresponding to the arc-shaped elastic protection silica gel strips (909) inside the shaping wrapping layer (908). The inner side of the T-shaped limiting long strip (905) is filled with a sealing filler (912).

8. An industrial low-smoke, halogen-free, fire-resistant low-voltage cable according to claim 7, characterized in that, The three cores (1) are equidistantly surrounded outside the central positioning shaft (901). The three cores (1) respectively correspond to the three arc-shaped positioning grooves (902). The shape of the outer limiting card slot (903) and the inner limiting card slot (904) after being connected is the same as the shape of the gourd-shaped limiting rubber soft block (907). The gourd-shaped limiting rubber soft block (907) is movably embedded inside the outer limiting card slot (903) and the inner limiting card slot (904).

9. An industrial low-smoke, halogen-free and fire-resistant low-voltage cable according to claim 7, characterized in that, The adjacent arc-shaped splicing sealing strips (906) are mutually attached. The inner wall of the arc-shaped splicing sealing strip (906) is attached to the surface of the shielding layer (3).

10. An industrial low-smoke, halogen-free and fire-resistant low-voltage cable according to claim 7, characterized in that, The arc-shaped elastic protection silica gel strips (909) are located outside the T-shaped limiting long strip (905). The position of the metal compression-resistant strip (910) corresponds to that of the core (1). The metal connecting arc-shaped sheets (911) are attached to the surface of the arc-shaped elastic protection silica gel strips (909). The number of the arc-shaped elastic protection silica gel strips (909), the metal connecting arc-shaped sheets (911), and the metal compression-resistant strips (910) is three. Both ends of the metal connecting arc-shaped sheets (911) are connected to the edges of the adjacent two metal compression-resistant strips (910).

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