Wear-resistant flame-retardant fireproof cable and preparation method thereof

Abstract

The invention discloses a wear-resistant flame-retardant fireproof cable and a preparation method thereof, and relates to the technical field of fireproof cables, the wear-resistant flame-retardant fireproof cable comprises six wire cores, each wire core is composed of a copper stranded wire and a cross-linked polyethylene pipe, the outer surface of each wire core is fixedly connected with a special-shaped plastic pipe, and the outer surface of each special-shaped plastic pipe is fixedly connected with a cable core. The outer surface of the special-shaped plastic tube is fixedly connected with an inner sliding strip, and the outer surface of the inner sliding strip is fixedly connected with a heat shrink tube. According to the wear-resistant flame-retardant fireproof cable and the preparation method thereof, the supporting mechanism is used for guiding gas in the ventilation pipes into the gas flow channel, the number of the ventilation pipes is two, so that guiding-in and guiding-out of cooling gas in the heat shrink tube are controlled, the telescopic pipe is arranged on the outer surface of the sealing mechanism in a sleeving mode, and when the cable is dragged and laid on the ground, the cable is not prone to falling off. The telescopic pipe effectively protects the ventilation pipe and the sealing mechanism, and the problem of how to avoid cable combustion in a cooling mode so as to reduce loss is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fireproof cables, in particular to a wear-resistant, flame-retardant, fireproof cable and a preparation method thereof. Background Art

[0002] When a fire occurs in a place where cables are installed, the fire will often spread to various places along the cables. In order to reduce the occurrence of the above problems, the flame retardant layer of traditional cables generally adopts a single flame retardant material. The flame retardant is a halogen flame retardant. When burned, a large amount of smoke and toxic gases are generated. The amount increases with the increase of the combustion temperature. Therefore, it can only be used for low-temperature flame retardancy. The halogen-free flame retardants used in recent years have less smoke and low toxicity, but contain a large amount of hydrated substances. When the temperature is high, the hydrated substances inside the cable will undergo a dehydration reaction, thereby reducing the physical and mechanical properties of the cable. Therefore, the flame retardant temperature cannot be high. The Chinese patent announcement number is: CN114864167A discloses "A pressure-resistant fireproof cable". In this patent, a protective sheet is used to protect the outside of the cable body from impact, and the elastic metal properties of the internal heat dissipation metal strip itself are used to protect the inside of the cable from impact. Secondly, the connection between the metal strip and the protective sheet through the heat-conducting vertical strip can be used to quickly dissipate heat by heat conduction. At the same time, the property of the metal strip's memory alloy that it can return to its original shape at high temperatures can be used. When an open flame occurs in the cable, the high temperature of the open flame can be used to prompt the metal strip to quickly return to its original shape and wrap around the fire point, effectively preventing the spread of the open flame.

[0003] Existing wear-resistant, flame-retardant, and fireproof cables and their preparation methods have structural design defects, which may cause fire to spread through the cable outer sheath layer. The fire barrier effect of wrapping the battery core is poor, and there is a problem of how to use cooling methods to avoid cable combustion and thus reduce losses. Summary of the Invention

[0004] The present invention provides a wear-resistant, flame-retardant and fire-resistant cable and a preparation method thereof, which solve the problems mentioned in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a wear-resistant, flame-retardant, fire-resistant cable, comprising a core, the core being composed of a copper strand and a cross-linked polyethylene tube, the core being six in number, the outer surface of the core being fixedly connected to a special-shaped plastic tube, the outer surface of the special-shaped plastic tube being fixedly connected to an inner slide, the outer surface of the inner slide being fixedly connected to a heat shrink tube, and further comprising: A support mechanism, wherein the inner side of the support mechanism is fixedly mounted on the outer surface of the heat shrink tube, and the support mechanism is used to introduce and export cooling gas from the inner side of the heat shrink tube and to provide fire retardancy to the outer side of the cable. A vent pipe is fixedly connected to the interior of the support mechanism, and a connecting ring is fixedly connected to the surface of the support mechanism near the edge, and a telescopic tube is fixedly connected to the outer surface of the connecting ring; A sealing mechanism is fixedly mounted on the outer surface of the heat shrink tube, the end face of the sealing mechanism is fixedly connected to the surface of the supporting mechanism, a gap is provided between the sealing mechanism and the heat shrink tube, the gap is filled with silicone coating, and the sealing mechanism is used for sealing and protecting the heat shrink tube from the outside world.

[0006] Preferably, a hemp rope is fixedly connected to the middle position of the inner side surface of the special-shaped plastic tube, a spiral strip is fixedly connected to the inner side surface of the inner slide, a plastic sheet is fixedly connected to the position between the spiral strip and the wire core, and the special-shaped plastic tube is used to block and limit multiple wire cores. The hemp rope is filled to the middle position of the inner side surface of the special-shaped plastic tube, and silicone coating is filled into the interior of the special-shaped plastic tube. After the coating cools and takes shape, the stability of the special-shaped plastic tube is increased. The centering of the hemp rope can effectively prevent the wire core from being dislocated when the cable is squeezed. The heat shrink tube is wrapped around the outer surface of the inner slide, and an air flow path is formed between the heat shrink tube and the wire core. The support mechanism is arranged on the outer surface of the heat shrink tube.

[0007] Preferably, a glue injection channel is provided on the inner side of the special-shaped plastic tube, a partition structure is provided on the surface of the special-shaped plastic tube, the partition structure is used to block the wire cores, and the inner side of the glue injection channel is poured with silicone coating.

[0008] Preferably, the supporting mechanism includes a flame retardant component, the inner side surface of the flame retardant component is in close contact with the surface of the heat shrink tube, the interior of the flame retardant component is fixedly connected to the surface of the ventilation tube, the inner side surface of the flame retardant component is fixedly connected to the perforated tube, the cable is provided with a plurality of flame retardant components, the flame retardant component is coated on the outer side surface of the heat shrink tube, the surface of each flame retardant component is fixedly connected to the perforated tube, the perforated tube extends to the interior of the heat shrink tube for passing cooling gas to the surface of the wire core, the inner sliding strip is used to limit the spiral strip, the tightening effect of the spiral strip causes the multiple wire cores to be pressed onto the surface of the special-shaped plastic tube, the plastic sheet is arranged between the wire core and the spiral strip, for limiting the wire core and protecting the surface of the wire core at the same time.

[0009] Preferably, the support mechanism further comprises a sealing plug, which is fixedly mounted on the inner side of the perforated tube, and one end of the perforated tube away from the sealing plug extends to the interior of the heat shrink tube.

[0010] Preferably, the support mechanism further includes a sphere, the surface of the sphere is rollingly mounted on the outer surface of the flame retardant component, the inner side of the flame retardant component is connected with a fastening bolt by bolts, and the interior of the perforated tube is connected to the interior of the ventilation tube.

[0011] Preferably, the flame retardant component includes a shell, the top and bottom of the shell are provided with through holes, the middle position of the inner side surface of the shell is provided with an opening, the surface of the shell is provided with an embedded hole near the edge, and the inner groove is used to place multiple spheres. When the cable is dragged and pulled, the spheres roll relative to the ground to reduce friction, so that the cable is not easily worn when being dragged. The telescopic tube is fixedly installed on the surface of the shell near the edge. The shell is made of a harder flame retardant material, and the embedded rubber tube effectively protects the ventilation pipe to prevent it from being damaged by pulling when it is bent.

[0012] Preferably, the flame retardant component also includes an extension tube, which is fixedly installed in the middle position of the shell surface, and the side of the extension tube away from the shell is fixedly connected to an injection valve. The material of the flame retardant component is relatively hard, and the flame retardant component supports the surface of the guide slide. There are two semicircular shells and they are arranged opposite to each other. A gap is set between the semicircular shell and the heat shrink tube. The two semicircular shells are combined and docked to wrap the outer surface of the heat shrink tube, and the injection hole fills the silicone filler into the gap between the semicircular shell and the heat shrink tube.

[0013] Preferably, a stabilizing groove is provided on the surface of the shell near the end face, an inner groove is provided on the cylindrical surface of the shell surface, and an embedded rubber tube is fixedly connected to the inner side surface of the shell near the ventilation pipe.

[0014] Preferably, the sealing mechanism includes a semicircular shell, and there are two semicircular shells which are arranged opposite to each other. A filling hole is opened on the surface of the semicircular shell, and the inner side surface of the semicircular shell is in close contact with the surface of the heat shrink tube. When the cable is dragged, the spring on the surface of the telescopic tube can effectively prevent the surface of the cable from being scratched. At the same time, the telescopic tube close to the edge of the shell can prevent debris from accumulating on the surface of the shell. In this process, the shell and the telescopic tube are subjected to external pressure, so that the heat shrink tube is not easily squeezed and deformed. The special-shaped plastic tube, spiral strips and inner sliding strips form a support structure for the airflow channel. When the cable is squeezed or bent by the outside world, the cooling airflow channel inside the heat shrink tube is not easily deformed, thereby improving the cooling efficiency of the packaging cooling gas.

[0015] Preferably, the end face of the semicircular shell is fixedly connected to a guide slide, the surface of the guide slide is fixedly connected to an arc plate, the surface of the arc plate is provided with a circular hole, and countersunk holes are provided at the upper and lower positions of the surface of the arc plate.

[0016] A method for preparing a wear-resistant, flame-retardant, fire-resistant cable comprises the following steps: Step 1: Wire core manufacturing: at room temperature, draw the copper rod into copper wire, heat and keep the copper wire warm, and then naturally cool the copper wire. Twist the copper wire by twisting multiple single wires to form a copper stranded wire. Use a traction machine to pull the copper stranded wire to the inside of an injection molding extruder and coat it with cross-linked polyethylene to complete the preparation of the copper conductor wire core. Similarly, the preparation of the six wire cores is completed. Step 2: Install the cooling structure. Put plastic and rubber granules into the injection molding extruder. The hot-melt plastic is formed into a special-shaped plastic tube through the die. Multiple inner slides are sequentially joined to the surface of the special-shaped plastic tube and fixed by hot melting. The wire core prepared in step 1 is placed on the surface of the special-shaped plastic tube. A spiral strip is sequentially passed through the multiple inner slides and tightened. The heat shrink tube is placed on the surface of the rubber ring and heated so that the multiple wire cores are covered and limited. Step 3: Install the support structure. Slide the flame retardant component to the outer surface of the heat shrink tube. Pass the vent tube through the surface of the flame retardant component. Hold the perforated tube and screw it into the flame retardant component from the outside to the inside. Pass the end of the perforated tube through the heat shrink tube to the inside of the heat shrink tube. Place multiple spheres on the surface of the flame retardant component and install multiple support structures in sequence. Step 4: Install the sealing mechanism. Weld and assemble the semicircular shell, guide slide and arc plate. Then, slide the guide slide into the inner side of the flame retardant component. Infuse the flame retardant into the interior of the flame retardant component and seal it. After the two semicircular shells are joined, a filling gap is formed between the heat shrink tube. Fill the gap with silicone paint. The silicone paint flows into the interior of the flame retardant component. The silicone paint cools and takes shape to seal the heat shrink tube, flame retardant component and semicircular shells.

[0017] The present invention provides a wear-resistant, flame-retardant, fire-resistant cable and a preparation method thereof. It has the following beneficial effects: 1. The wear-resistant, flame-retardant and fire-proof cable and its preparation method have a support mechanism for introducing the gas inside the vent pipe into the interior of the air flow channel. There are two vent pipes, thereby controlling the introduction and export of cooling gas inside the heat shrink tube. The telescopic tube is sleeved on the outer surface of the sealing mechanism. When the cable is dragged and laid on the ground, the telescopic tube effectively protects the vent pipe and the sealing mechanism, solving the problem of how to use cooling to avoid cable combustion and thus reduce losses.

[0018] 2. The wear-resistant, flame-retardant, and fire-proof cable and its preparation method. The device is provided with multiple flame-retardant components. The perforated tube injects cooling gas into the interior of the air flow channel. The cooling gas removes the heat from the surface of the wire core. The cooling gas is then discharged through the ventilation tube at the lower position to avoid the cooling gas from heating up during the flow process and failing to play a cooling role in the subsequent cooling process. The introduction and discharge of gas increases the cooling efficiency of the cooling gas.

[0019] 3. The wear-resistant, flame-retardant and fire-proof cable and its preparation method, the position between the shell and the heat shrink tube is filled with flame retardant, the extension tube and the injection valve are used to block the shell, and the injection valve is used to fill the flame retardant into the interior of the shell. The shell and the flame retardant inside can effectively prevent the fire from spreading along the sealing mechanism, and cooperate with the perforated tube to guide the cooling gas inside the vent tube to the inside of the heat shrink tube, thereby making the cable flame retardant and fireproof effect better, and solving the problem that the fire will spread through the outer sheath layer of the cable and the combustion barrier effect by wrapping the battery core is poor.

[0020] 4. The wear-resistant, flame-retardant and fireproof cable and its preparation method, after the silicone fills the gap, it flows into the interior of the flame-retardant component, so that the gap between the flame-retardant component and the heat shrink tube is filled. The silicone cools and takes shape, preventing the gas and liquid outside the cable from entering the air flow channel through the gap, making it difficult for the cooling gas around the core to overflow, and the temperature of the cooling gas will not be reduced, thereby ensuring the cooling efficiency. At the same time, flammable gas is not easy to enter the cable and cause combustion, and liquid is not easy to enter the cable and cause short-circuit combustion, so that the overall fire-retardant effect of the cable is better.

[0021] 5. The wear-resistant, flame-retardant and fire-proof cable and its preparation method are as follows: the guide slide slides into the interior of the stabilizing groove, the arc plate is connected to the surface of the shell, the fastening bolts cooperate with the countersunk holes, so that the arc plate is pressed against the surface of the shell, and after the semicircular shells are combined, the flame retardant is filled into the interior of the shell through the injection valve, and then the silicone sealant is filled into the gap through the injection hole. The coating makes the inner side of the shell and the heat shrink tube sealed, so that the sealing and flame retardant effect of the cable is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A perspective view of the top of the entire invention; Figure 2 This is a perspective view of the entire wear-resistant, flame-retardant, and fire-resistant cable of the present invention; Figure 3 A three-dimensional diagram of the interior of the wear-resistant, flame-retardant, and fire-resistant cable of the present invention; Figure 4 It is a schematic structural diagram of the overall cooling mechanism of the present invention; Figure 5 It is a schematic diagram of the structure of a part of the cooling mechanism of the present invention; Figure 6 This is a schematic diagram of the structural connection between the support mechanism and the heat shrink tube of the present invention; Figure 7 It is a structural schematic diagram of the support mechanism of the present invention; Figure 8 This is a schematic structural diagram of the flame retardant assembly of the present invention; Figure 9 It is a schematic structural diagram of the sealing mechanism of the present invention; Figure 10It is a schematic structural diagram of a part of the sealing mechanism of the present invention.

[0023] In the figure: 1. Cooling mechanism; 11. Special-shaped plastic tube; 12. Hemp rope; 13. Wire core; 14. Plastic sheet; 15. Spiral strip; 16. Inner slide strip; 17. Heat shrink tube; 18. Glue injection channel; 19. Partition structure; 2. Support mechanism; 21. Flame retardant component; 211. Shell; 212. Opening; 213. Embedded hole; 214. Extension tube; 215. Stabilizing groove; 216. Injection valve; 217. Embedded rubber tube; 22. Opening tube; 23. Sealing plug; 24. Sphere; 25. Fastening bolt; 3. Vent; 4. Sealing mechanism; 41. Semicircular shell; 42. Injection hole; 43. Guide slide; 44. Arc plate; 45. Countersunk hole; 5. Connecting ring; 6. Telescopic tube. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] First embodiment: Figure 1-Figure 5 As shown, the present invention provides a technical solution: a wear-resistant, flame-retardant, fire-resistant cable, including a core 13, the core 13 is composed of a copper stranded wire and a cross-linked polyethylene tube, the number of the core 13 is six, the outer surface of the core 13 is fixedly connected to a special-shaped plastic tube 11, the outer surface of the special-shaped plastic tube 11 is fixedly connected to an inner slide 16, the outer surface of the inner slide 16 is fixedly connected to a heat shrink tube 17, and further comprising: Support mechanism 2, the inner side of the support mechanism 2 is fixedly mounted on the outer surface of the heat shrink tube 17, and the support mechanism 2 is used to introduce and export cooling gas on the inner side of the heat shrink tube 17 and to provide fire retardant insulation on the outer side of the cable. A vent pipe 3 is fixedly connected to the interior of the support mechanism 2, and a connecting ring 5 is fixedly connected to the surface of the support mechanism 2 near the edge, and a telescopic tube 6 is fixedly connected to the outer surface of the connecting ring 5; The sealing mechanism 4 is fixedly mounted on the outer surface of the heat shrinkable tube 17. The end surface of the sealing mechanism 4 is fixedly connected to the surface of the support mechanism 2. A gap is provided between the sealing mechanism 4 and the heat shrinkable tube 17. The gap is filled with silicone coating. The sealing mechanism 4 is used for sealing and protecting the heat shrinkable tube 17 from the outside world. A hemp rope 12 is fixedly connected to the middle of the inner side of the special-shaped plastic tube 11, a spiral strip 15 is fixedly connected to the inner side of the inner slide 16, and a plastic sheet 14 is fixedly connected to the position between the spiral strip 15 and the wire core 13; The inner side of the special-shaped plastic tube 11 is provided with a glue injection channel 18 , and the surface of the special-shaped plastic tube 11 is provided with a separation structure 19 , which is used to block the wire cores 13 . The inner side of the glue injection channel 18 is filled with silicone coating.

[0026] When in use, the special-shaped plastic tube 11 is used to block and limit multiple wire cores 13, fill the hemp rope 12 to the middle position of the inner side of the special-shaped plastic tube 11, and fill the interior of the special-shaped plastic tube 11 with silicone paint. After the paint cools and takes shape, the stability of the special-shaped plastic tube 11 is increased. The centering of the hemp rope 12 can effectively prevent the wire core 13 from being dislocated when the cable is squeezed. The heat shrink tube 17 is wrapped around the outer surface of the inner slide 16, and an air flow channel is formed between the heat shrink tube 17 and the wire core 13. The support mechanism 2 is arranged on the outer surface of the heat shrink tube 17. The support mechanism 2 is used to introduce the gas inside the ventilation tube 3 into the interior of the air flow channel. There are two ventilation tubes 3, so as to control the introduction and export of the cooling gas inside the heat shrink tube 17. The telescopic tube 6 is sleeved on the outer surface of the sealing mechanism 4. When the cable is dragged and laid on the ground, the telescopic tube 6 effectively protects the ventilation tube 3 and the sealing mechanism 4, solving the problem of how to use cooling to avoid cable burning and thus reduce losses.

[0027] Second embodiment: Figure 6 、 Figure 7 As shown, the support mechanism 2 includes a flame retardant component 21, the inner side surface of the flame retardant component 21 is in close contact with the surface of the heat shrink tube 17, the interior of the flame retardant component 21 is fixedly connected to the surface of the ventilation pipe 3, the inner side surface of the flame retardant component 21 is fixedly connected to the perforated tube 22, the support mechanism 2 also includes a sealing plug 23, the sealing plug 23 is fixedly installed on the inner side surface of the perforated tube 22, and the perforated tube 22 extends to the interior of the heat shrink tube 17 away from the sealing plug 23. The support mechanism 2 also includes a sphere 24, the surface of the sphere 24 is rollingly installed on the outer surface of the flame retardant component 21, the inner side surface of the flame retardant component 21 is connected to the fastening bolt 25 by bolts, and the interior of the perforated tube 22 is connected to the interior of the ventilation pipe 3.

[0028] When in use, the cable is provided with a plurality of flame-retardant components 21, which are coated on the outer side of the heat-shrinkable tube 17. The surface of each flame-retardant component 21 is fixedly connected to a perforated tube 22, which extends to the interior of the heat-shrinkable tube 17 for passing cooling gas to the surface of the wire core 13. The inner slide 16 is used to limit the spiral strip 15. The tightening effect of the spiral strip 15 causes the multiple wire cores 13 to be pressed against the surface of the special-shaped plastic tube 11. The plastic sheet 14 is arranged between the wire core 13 and the spiral strip 15 to limit the wire core 13 and protect the surface of the wire core 13. The device is provided with a plurality of flame-retardant components 21. The perforated tube 22 injects cooling gas into the interior of the air flow channel. The cooling gas removes the heat from the surface of the wire core 13, and then the cooling gas is discharged through the ventilation pipe 3 at the lower position to prevent the cooling gas from heating up during the flow process and failing to play a cooling role in the subsequent cooling process. The introduction and discharge of gas increases the cooling efficiency of the cooling gas.

[0029] The third embodiment: Figure 7 、 Figure 8 As shown, the flame retardant component 21 includes a shell 211, and through holes are provided on the top and bottom of the shell 211. An opening 212 is provided at the middle position of the inner side surface of the shell 211, and an embedded hole 213 is provided at the surface of the shell 211 near the edge. The flame retardant component 21 also includes an extension tube 214, which is fixedly installed at the middle position of the surface of the shell 211. The side of the extension tube 214 away from the shell 211 is fixedly connected to the injection valve 216, a stabilizing groove 215 is provided on the surface of the shell 211 near the end face, an inner groove is provided on the cylindrical position of the surface of the shell 211, and an embedded rubber tube 217 is fixedly connected to the position of the inner side surface of the shell 211 near the ventilation pipe 3.

[0030] When in use, the inner groove is used to place multiple balls 24. When the cable is dragged and pulled, the balls 24 roll relative to the ground, reducing friction, making the cable less likely to be worn when dragged. The telescopic tube 6 is fixedly installed on the surface of the shell 211 near the edge. The shell 211 is made of a harder flame-retardant material. The embedded rubber tube 217 effectively protects the vent tube 3 to prevent the vent tube 3 from being damaged when bent. The position between the shell 211 and the heat shrink tube 17 is filled with flame retardant. The extension tube 214 and the injection valve 216 are used to block the shell 211. The injection valve 216 is used to fill the flame retardant into the interior of the shell 211. The shell 211 and the flame retardant inside can effectively prevent the fire from spreading along the sealing mechanism 4, and cooperate with the perforated tube 22 to guide the cooling gas inside the vent tube 3 to the inside of the heat shrink tube 17, thereby making the cable flame retardant and fireproof better, and solving the problem that the fire will spread through the outer sheath layer of the cable and the combustion barrier effect by wrapping the battery core is poor.

[0031] Fourth embodiment: Figures 8-10As shown, the sealing mechanism 4 includes a semicircular shell 41. There are two semicircular shells 41 and they are arranged opposite to each other. An injection hole 42 is provided on the surface of the semicircular shell 41. The inner side surface of the semicircular shell 41 is in close contact with the surface of the heat shrink tube 17. The end surface of the semicircular shell 41 is fixedly connected to a guide slide 43. The surface of the guide slide 43 is fixedly connected to an arc plate 44. A circular hole is provided on the surface of the arc plate 44. Countersunk holes 45 are provided at the upper and lower positions of the surface of the arc plate 44.

[0032] When in use, the material of the flame retardant component 21 is relatively hard, and the flame retardant component 21 supports the surface of the guide slide 43. There are two semicircular shells 41 and they are arranged opposite to each other. A gap is set between the semicircular shell 41 and the heat shrink tube 17. The two semicircular shells 41 are connected and docked, thereby wrapping the outer surface of the heat shrink tube 17. The injection hole 42 fills the silicone filler into the gap between the semicircular shell 41 and the heat shrink tube 17. After the silicone fills the gap, it flows into the interior of the flame retardant component 21, so that the gap between the flame retardant component 21 and the heat shrink tube 17 is filled. The silicone cools and takes shape to prevent the gas and liquid outside the cable from entering the air flow channel through the gap, so that the cooling gas around the core 13 is not easy to overflow, and the temperature of the cooling gas will not be reduced, thereby ensuring the cooling efficiency. At the same time, flammable gas is not easy to enter the cable and cause combustion, and liquid is not easy to enter the cable and cause short-circuit combustion, so that the overall fire retardant effect of the cable is better.

[0033] Fifth embodiment: Figure 8 、 Figure 9 As shown, an opening 212 is provided in the middle of the inner side surface of the shell 211, and an embedded hole 213 is provided on the surface of the shell 211 near the edge. The flame retardant assembly 21 also includes an extension tube 214, which is fixedly installed in the middle of the surface of the shell 211. A filling valve 216 is fixedly connected to the side of the extension tube 214 away from the shell 211. A stabilizing groove 215 is provided on the surface of the shell 211 near the end surface, an inner groove is provided on the cylindrical surface of the shell 211, and an embedded rubber tube 217 is fixedly connected to the inner side surface of the shell 211 near the vent pipe 3. There are two semicircular shells 41 and they are arranged opposite to each other. An injection hole 42 is provided on the surface of the semicircular shell 41. The inner side surface of the semicircular shell 41 is in close contact with the surface of the heat shrink tube 17. A guide slide 43 is fixedly connected to the end surface of the semicircular shell 41. An arc plate 44 is fixedly connected to the surface of the guide slide 43. A circular hole is provided on the surface of the arc plate 44. Countersunk holes 45 are provided at the upper and lower positions of the surface of the arc plate 44.

[0034] During use, when the cable is dragged, the spring on the surface of the telescopic tube 6 can effectively prevent the cable surface from being scratched. At the same time, the telescopic tube 6 near the edge of the shell 211 can prevent debris from accumulating on the surface of the shell 211. During this process, the shell 211 and the telescopic tube 6 are subjected to external pressure, making it difficult for the heat shrink tube 17 to be squeezed and deformed. The special-shaped plastic tube 11, the spiral strip 15 and the inner slide strip 16 form a support structure for the airflow channel. When the cable is squeezed or bent by the outside world, the cooling airflow channel inside the heat shrink tube 17 is not easily deformed. In order to improve the cooling efficiency of the packaging cooling gas, the guide slide 43 slides into the interior of the stabilizing groove 215, the arc plate 44 is connected to the surface of the shell 211, and the fastening bolts 25 cooperate with the countersunk holes 45, so that the arc plate 44 is pressed against the surface of the shell 211. After the semicircular shells 41 are combined, the flame retardant is filled into the interior of the shell 211 through the injection valve 216, and then the silicone sealant is filled into the gap through the injection hole 42. The coating makes the inner side of the shell 211 sealed with the heat shrink tube 17, so that the sealing and flame retardant effect of the cable is better.

[0035] Sixth embodiment: Figure 1-10 As shown, a method for preparing a wear-resistant, flame-retardant, fire-resistant cable comprises the following steps: Step 1: Wire core manufacturing: at room temperature, draw a copper rod into a copper wire, heat and keep the copper wire warm, and then naturally cool the copper wire. Twist the copper wire by twisting multiple single wires to form a copper stranded wire. Use a traction machine to pull the copper stranded wire to the inside of an injection molding extruder and coat it with cross-linked polyethylene to complete the preparation of the copper conductor core 1. Similarly, the preparation of six wire cores 1 is completed. Step 2: Install the cooling structure. Put plastic and rubber granules into the injection molding extruder. The hot-melt plastic is formed into a special-shaped plastic tube 11 through a die. Multiple inner slides 52 are sequentially joined to the surface of the special-shaped plastic tube 11 and fixed by heat melting. The wire core 1 prepared in step 1 is placed on the surface of the special-shaped plastic tube 11. The spiral strip 15 is sequentially passed through the multiple inner slides 52 and tightened. The heat shrink tube 17 is placed on the surface of the rubber ring 56 and heated so that the multiple wire cores 1 are covered and limited. Step 3: Install the support structure. Slide the flame retardant component 21 to the outer surface of the heat shrink tube 17, pass the vent tube 3 through the surface of the flame retardant component 21, and screw the perforated tube 22 from the outside to the inside of the flame retardant component 21. The end surface of the perforated tube 22 passes through the heat shrink tube 17 to the inside of the heat shrink tube 17. Place multiple spheres 24 on the surface of the flame retardant component 21, and install multiple support structures in sequence. Step 4: Install the sealing mechanism. Weld and assemble the semicircular shell 41, the guide slide 43 and the arc plate 44. Then, slide the guide slide 43 into the inner side of the flame retardant component 21, inject the flame retardant into the interior of the flame retardant component 21 and seal it. After the two semicircular shells 41 are joined, a filling gap is formed between the heat shrink tube 17. Fill the gap with silicone paint. The silicone paint flows to the interior of the flame retardant component 21. The silicone paint cools and takes shape, so that the heat shrink tube 17, the flame retardant component 21 and the semicircular shell 41 are sealed.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "including an element defined by..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element."

Claims

1. A wear-resistant, flame-retardant and fire-proof cable, comprising a wire core (13), characterized in that: The wire core (13) is composed of a copper strand and a cross-linked polyethylene tube, the number of the wire cores (13) is six, the outer surface of the wire core (13) is fixedly connected to a special-shaped plastic tube (11), the outer surface of the special-shaped plastic tube (11) is fixedly connected to an inner slide bar (16), the outer surface of the inner slide bar (16) is fixedly connected to a heat shrink tube (17), and further comprises: A support mechanism (2), wherein the inner side surface of the support mechanism (2) is fixedly mounted on the outer surface of the heat shrink tube (17), the support mechanism (2) is used for introducing and discharging cooling gas from the inner side surface of the heat shrink tube (17) and for fire-proofing the outer side surface of the cable, a vent pipe (3) is fixedly connected to the inside of the support mechanism (2), a connecting ring (5) is fixedly connected to the surface of the support mechanism (2) near the edge, and a telescopic tube (6) is fixedly connected to the outer surface of the connecting ring (5); A sealing mechanism (4), the sealing mechanism (4) being fixedly mounted on the outer surface of the heat shrink tube (17), the end surface of the sealing mechanism (4) being fixedly connected to the surface of the support mechanism (2), a gap being provided between the sealing mechanism (4) and the heat shrink tube (17), the gap being filled with silicone coating, the sealing mechanism (4) being used for sealing and protecting the heat shrink tube (17) from the outside.

2. The wear-resistant, flame-retardant and fire-resistant cable according to claim 1, characterized in that: A hemp rope (12) is fixedly connected to the middle of the inner side of the special-shaped plastic tube (11), a spiral strip (15) is fixedly connected to the inner side of the inner slide strip (16), and a plastic sheet (14) is fixedly connected to the position between the spiral strip (15) and the wire core (13).

3. The wear-resistant, flame-retardant and fire-resistant cable according to claim 2, characterized in that: The inner side surface of the special-shaped plastic tube (11) is provided with a glue injection channel (18), the surface of the special-shaped plastic tube (11) is provided with a partition structure (19), the partition structure (19) is used to block the wire cores (13), and the inner side surface of the glue injection channel (18) is injected with silicone coating.

4. The wear-resistant, flame-retardant and fire-resistant cable according to claim 3, characterized in that: The support mechanism (2) comprises a flame retardant component (21), the inner side surface of the flame retardant component (21) is in close contact with the surface of the heat shrink tube (17), the interior of the flame retardant component (21) is fixedly connected to the surface of the ventilation pipe (3), and the inner side surface of the flame retardant component (21) is fixedly connected to the perforated tube (22).

5. The wear-resistant, flame-retardant and fire-resistant cable according to claim 4, characterized in that: The support mechanism (2) further comprises a sealing plug (23), wherein the sealing plug (23) is fixedly mounted on the inner side of the perforated tube (22), and an end of the perforated tube (22) away from the sealing plug (23) extends to the interior of the heat shrink tube (17).

6. The wear-resistant, flame-retardant and fire-resistant cable according to claim 5, characterized in that: The support mechanism (2) further comprises a sphere (24), the surface of the sphere (24) being rollingly mounted on the outer surface of the flame retardant component (21), the inner side surface of the flame retardant component (21) being connected to a fastening bolt (25) via bolts, and the interior of the perforated tube (22) being in communication with the interior of the ventilation tube (3).

7. The wear-resistant, flame-retardant and fire-resistant cable according to claim 6, characterized in that: The flame retardant assembly (21) comprises a shell (211), the top and bottom of the shell (211) are provided with through holes, the middle of the inner side surface of the shell (211) is provided with an opening (212), and the surface of the shell (211) near the edge is provided with an embedded hole (213).

8. The wear-resistant, flame-retardant and fire-resistant cable according to claim 7, characterized in that: The sealing mechanism (4) comprises a semicircular shell (41), wherein there are two semicircular shells (41) arranged opposite to each other, a material injection hole (42) is provided on the surface of the semicircular shell (41), and the inner side surface of the semicircular shell (41) is in close contact with the surface of the heat shrink tube (17).

9. The wear-resistant, flame-retardant and fire-resistant cable according to claim 8, characterized in that: A guide slide plate (43) is fixedly connected to the end surface of the semicircular shell (41), a curved plate (44) is fixedly connected to the surface of the guide slide plate (43), a circular hole is provided on the surface of the curved plate (44), and countersunk holes (45) are provided at upper and lower positions of the surface of the curved plate (44).

10. A method for preparing a wear-resistant, flame-retardant and fire-resistant cable, characterized in that: The following steps are involved: Step 1, manufacturing the wire core, at room temperature, drawing a copper rod into a copper wire, heating and keeping the copper wire warm, and then naturally cooling the copper wire, twisting the copper wire by twisting multiple single wires to form a copper stranded wire, using a traction machine to pull the copper stranded wire to be coated inside an injection molding extruder for coating with cross-linked polyethylene, thereby completing the preparation of the copper conductor wire core (1), and similarly completing the preparation of six wire cores (1); Step 2, installing the cooling structure, putting plastic and rubber particles into an injection molding extruder, hot-melt plastic is formed into a special-shaped plastic tube (11) through a die, a plurality of inner slides (52) are sequentially joined to the surface of the special-shaped plastic tube (11) and fixedly joined by hot melting, the wire core (1) prepared in step 1 is placed on the surface of the special-shaped plastic tube (11), a spiral strip (15) is sequentially passed through the plurality of inner slides (52) and tightened, a heat shrink tube (17) is sleeved on the surface of the rubber ring (56) and heated so that the plurality of wire cores (1) are covered and limited; Step 3: Install the support structure. Slide the flame retardant component (21) to the outer surface of the heat shrink tube (17), pass the ventilation tube (3) through the surface of the flame retardant component (21), hold the perforated tube (22) and screw it into the flame retardant component (21) from the outside to the inside. The end surface of the perforated tube (22) passes through the heat shrink tube (17) to the inside of the heat shrink tube (17), place a plurality of spheres (24) on the surface of the flame retardant component (21), and install a plurality of support structures in sequence. Step 4: Install the sealing mechanism. The semicircular shell (41), the guide slide plate (43) and the arc plate (44) are welded and assembled. Subsequently, the guide slide plate (43) is slid into the inner side of the flame retardant component (21). The flame retardant is poured into the interior of the flame retardant component (21) and then sealed. After the two semicircular shells (41) are joined, a filling gap is formed between the heat shrink tube (17). Silicone coating is filled in the gap. The silicone coating flows into the interior of the flame retardant component (21). The silicone coating is cooled and shaped so that the heat shrink tube (17), the flame retardant component (21) and the semicircular shell (41) are sealed.

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