An environment-friendly cable and its preparation process

Abstract

The present invention discloses an environment-friendly cable and its preparation process. The present invention relates to the technical field of cable manufacturing, and includes a barrier strip. The inner side of the barrier strip is fixedly connected with a polyethylene pipe. The inner side of the polyethylene pipe is fixedly connected with a spiral sheet. The inner side of the spiral sheet is fixedly connected with a wire core. The fixing mechanism is used for the introduction and export of cooling gas between the wire core and the polyethylene pipe and the insulation protection of the wire core surface. For this environment-friendly cable and its preparation process, the fixing mechanism conveys the cooling gas into the interior of each polyethylene pipe simultaneously. The cooling gas flows along the spiral sheet, thereby quickly taking away the heat on the surface of the wire core. The spiral airflow channel makes the gas more directional, so that the efficiency of the gas flowing and carrying away the heat is higher. The flame retardant mechanism blocks the outer side of the polyethylene pipe, making the cable not easy to catch fire and easy to be flame-retarded when on fire.

Description

Technical Field

[0001] The present invention relates to the technical field of cable manufacturing, and particularly to an environment-friendly cable and a preparation process thereof. Background Art

[0002] Fire-resistant cables are the general term for wires and cables with fire-resistant properties, referring to a class of wires and cables that can directly or indirectly reduce fire losses under fire conditions. They are usually divided into two categories: flame-retardant wires and cables, and fire-resistant wires and cables. Flame-retardant cables have the characteristic that when burning under specified test conditions, after removing the ignition source, the flame spreads on the cable specimen but does not exceed the specified range and extinguishes itself, that is, the ability to prevent or delay the occurrence or spread of fire. However, for existing cables, during the process of preventing the spread of fire, a large amount of smoke and harmful gases are easily generated, polluting the surrounding environment. At the same time, during use, heat cannot be quickly dissipated, affecting the use effect. Chinese Patent Publication No.: CN113707383B discloses "A Halogen-free Low-smoke Flame-retardant Environment-friendly Fire-resistant Cable". In this patent, by arranging a fireproof and flame-retardant layer outside the positioning layer, during application, the cable can bend at adjacent fireproof monomers, and the cable can be wound up for easy transportation. When no fire occurs, the heat of the cable core can be dissipated to the outside through the gaps between adjacent arc-shaped fireproof sheets. When a fire occurs, the external temperature of the cable rises. At this time, the heat-expandable rod expands when heated, causing multiple arc-shaped fireproof sheets to move synchronously towards the cable core and squeeze the belt body until the adjacent ends of multiple arc-shaped fireproof sheets come into contact with each other, forming an annular fireproof partition layer to prevent the fire from spreading to the cable core.

[0003] For existing environment-friendly cables and their preparation processes, due to structural design defects, there are problems that existing cables are prone to generate a large amount of smoke and harmful gases during the process of preventing the spread of fire, polluting the surrounding environment, and how to prevent the cable from burning due to overheating during use. Summary of the Invention

[0004] The present invention provides an environment-friendly cable and a preparation process thereof, solving the problems mentioned in the above background art.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: An environment-friendly cable includes a barrier strip. The inner side of the barrier strip is fixedly connected with a polyethylene pipe. The inner side of the polyethylene pipe is fixedly connected with a spiral sheet. The inner side of the spiral sheet is fixedly connected with a wire core. It further includes:

[0006] A fixing mechanism, which is fixedly installed at a position on the surface of the wire core near the end face. The fixing mechanism is used for the introduction and export of cooling gas between the wire core and the polyethylene pipe and the insulation protection of the wire core surface;

[0007] A flame retardant mechanism, the flame retardant mechanism is fixedly mounted on the outer surface of the polyethylene pipe, the flame retardant mechanism is used to support and limit the polyethylene pipe and block the fire on the outer surface of the polyethylene pipe, a plastic-coated steel wire is slidably connected between the fixing mechanism and the flame retardant mechanism, and a fixture is fixedly connected to the end surface of the plastic-coated steel wire;

[0008] A protection component, which is fixedly installed between the fixing mechanism and the flame retardant mechanism, and is used for sealing and protecting the outer surface of the polyethylene pipe;

[0009] The fixing mechanism comprises a stepped cylinder, the inner side surface of the stepped cylinder is fixedly connected to a connecting cylinder, the inner side surface of the connecting cylinder is fixedly connected to a connecting plate, the inner side surface of the connecting plate is fixedly connected to an internally threaded tube, and the side of the stepped cylinder away from the connecting cylinder is fixedly connected to a compression ring.

[0010] Preferably, the fixing mechanism also includes a sphere, which is rotatably mounted on the outer surface of the step cylinder, a blind pipe is fixedly connected to the middle position of the surface of the connecting plate, a diversion pipe is fixedly connected to the surface of the blind pipe, the flow guiding mechanism includes a wire core, a spiral sheet and a polyethylene tube, the support of the spiral sheet forms a spiral structure airflow channel between the wire core and the polyethylene tube, the barrier strip is connected to the position between the two fixing mechanisms, the protective component is connected to the position between the flame retardant mechanism and the fixing mechanism, the barrier strip blocks and centers multiple polyethylene tubes, the inner side of the flame retardant mechanism is in close contact with the outer surface of the polyethylene tube, and the interior of the fixing mechanism is connected to the interior of the airflow channel.

[0011] Preferably, one end of the shunt pipe away from the blind pipe is fixedly connected to a position on the surface of the polyethylene pipe close to the end face, and a first limit block is fixedly connected to one side of the surface of the stepped cylinder close to the sphere.

[0012] Preferably, the flame retardant mechanism includes a shell, the inner side surface of the shell is provided with a circular hole, the inner side surface of the shell is fixedly connected to the outer surface of the polyethylene tube, the inner side surface of the shell is provided with a guide hole near the polyethylene tube, the wire core and the polyethylene tube extend to the inner side surface of the internal threaded tube, the connecting tube supports the polyethylene tube, the shunt pipe is connected to the surface of the polyethylene tube, and the axial direction of the shunt pipe is inclined close to the polyethylene tube, the cooling gas is transported to the shunt pipe through a blind pipe, and the shunt pipe transports the cooling gas to the interior of the polyethylene tube, and the inclined airflow makes the air resistance smaller when the cooling gas flows along the spiral sheet.

[0013] Preferably, the flame retardant mechanism further comprises a second limit block, the second limit block is fixedly mounted on the surface of the shell body at a position close to the edge, and a positioning half shell is fixedly connected to the inner side surface of the shell body.

[0014] Preferably, there are two positioning half-shells, and an arc-shaped plate is fixedly connected to the inner side surface of the positioning half-shell. A carbon dioxide cylinder is fixedly connected to the surface of the arc-shaped plate. The top of the carbon dioxide cylinder extends to the outer surface of the positioning half-shell. The polyethylene tube is embedded at the position of the round hole. The housing blocks the entire protection component and the internally filled silica gel. When the cable catches fire, the fire spreads along the silica gel layer and the protection component to the housing, and extends from the surface of the housing to the outside of the protection component, which can effectively reduce the spread speed of the fire. Both the top and bottom of the carbon dioxide cylinder are set as sealed structures, but the material thickness of the top and bottom of the carbon dioxide cylinder is smaller during production.

[0015] Preferably, a thin film ring is fixedly connected to the position near the middle of the inner side surface of the housing. The bottom of the carbon dioxide cylinder is close to the thin film ring. A protective arc plate is fixedly connected to the outer surface of the housing.

[0016] Preferably, the protection component includes a fixing ring. The fixing ring is fixedly installed on the side surface of the housing. A plug pin is fixedly connected to the surface of the fixing ring. One end of the plug pin away from the fixing ring penetrates through the inside of the housing.

[0017] Preferably, a connecting ring is fixedly connected to the end of the plug pin away from the fixing ring. A heat shrinkable tube and an outer sheath are respectively fixedly connected to the surface of the fixing ring. A spiral steel wire is fixedly connected between the heat shrinkable tube and the outer sheath. The fixing ring fits on one side of the housing. The plug pin passes through the fixing ring and the housing to the connecting ring. The fixing ring and the connecting ring are fixedly installed on the surface of the housing by welding. Similarly, the fixing table is fixedly installed at the position near the edge of the inner side surface of the stepped cylinder. The inner side surface of the heat shrinkable tube is in close contact with the outer surface of the barrier strip. The injection holes on the surfaces of the heat shrinkable tube and the outer sheath are arranged in a staggered manner. The silica gel cooling and shaping material at the injection holes has a lower hardness.

[0018] Preferably, injection holes are formed on the surfaces of the heat shrinkable tube and the outer sheath. A fixing table is fixedly connected to the end of the outer sheath away from the fixing ring. The fixing table is fixedly connected to the inner side surface of the stepped cylinder. Second limit blocks are arranged at the positions near the edges on both sides of the housing, and the number of the second limit blocks is multiple. Correspondingly, multiple first limit blocks are also arranged at the positions near the edges on the surface of the stepped cylinder. The plastic-coated steel wire passes through the second limit blocks and the oppositely arranged first limit blocks in turn. After the plastic-coated steel wire has passed through multiple times, both ends of the plastic-coated steel wire are inserted into the extension holes.

[0019] Preferably, the fixer includes a C-shaped frame. An extension hole is formed on the inner side surface of the C-shaped frame. The C-shaped frame is fixedly connected to the end face of the plastic-coated steel wire near the extension hole. A communicating rod is fixedly connected to the inner side surface of the C-shaped frame.

[0020] A preparation process for an environment-friendly cable includes the following steps:

[0021] Step 1: Conductor structure manufacturing. At room temperature, draw a copper rod into a copper wire, heat up and keep the temperature of the copper wire, then cool the copper wire naturally. Strands of multiple single wires are twisted to form a copper stranded wire. Use a tractor to draw the copper stranded wire to be coated into the internal part of an injection extrusion machine to coat cross-linked polyethylene, thus completing the preparation of the wire core. Similarly, complete the preparation of six wire cores.

[0022] Step 2: Installation of the cooling structure. Put plastic and rubber particles into the injection extrusion machine. The molten plastic is formed into a barrier strip through a die. A spiral sheet is sleeved on the outer surface of the wire core prepared in Step 1. A polyethylene tube is sleeved outside the spiral sheet. By heating, the inner side of the polyethylene tube is made to closely adhere to the outer surface of the spiral sheet. Place the combined overall structure on the inner side of the barrier strip for preliminary gluing and positioning.

[0023] Step 3: Installation of the flame retardant structure. Slide the housing to a determined position on the outer surface of the polyethylene tube, with the diversion holes opposite to the polyethylene tube. Sequentially spot-weld the second limit blocks at positions near the edge on the surface of the housing. Wind the film ring around the position near the circular hole on the inner side of the housing. Fix and install an arc plate on the inner side of the positioning half-shell, and then butt-join and fixedly install the two positioning half-shells on the inner side of the housing. Multiple carbon dioxide cylinders are supported and limited.

[0024] Step 4: Installation of the support structure. Sleeve the connecting cylinder on the end face position of the overall structure in Step 2. Slide the connecting plate into the inner side of the connecting cylinder. There are holes on the surface of the polyethylene tube near the end face, and the end face of the wire core extends into the interior of the inner-threaded tube. Glue and seal the shunt tube at the position of the opening on the surface of the polyethylene tube. Then, integrally weld and install the stepped cylinder on the surface of the connecting plate. Sequentially spot-weld multiple first limit blocks at the end face position of the stepped cylinder.

[0025] The present invention provides an environment-friendly cable and its manufacturing process. It has the following beneficial effects:

[0026] 1. For this environment-friendly cable and its manufacturing process, the fixing mechanism conveys the cooling gas into the interior of each polyethylene tube simultaneously. The cooling gas flows along the spiral sheet, thus quickly taking away the heat on the surface of the wire core. The spiral gas flow channel makes the gas more directional, so that the efficiency of the gas flowing to carry away the heat is higher. The flame retardant mechanism blocks the outer side of the polyethylene tube, making the cable not easy to catch fire and easy to be flame-retarded when on fire.

[0027] 2. For this environmentally friendly cable and its manufacturing process, when gas flows from one end of the polyethylene pipe to the other end, the air flow cools the wire core with higher efficiency. The inner threaded pipe is externally connected to the wiring terminal, enabling the wire core to be connected to external wiring equipment. During installation, the pressing ring fits tightly against the edge of the surface of the connecting plate. When pouring silicone outside the polyethylene pipe, the flowing silicone fills the space between the connecting cylinder and the connecting plate, and the silicone is not likely to overflow through the edge of the connecting plate, solving the problem of how to prevent the cable from burning due to excessive temperature during use.

[0028] 3. For this environmentally friendly cable and its manufacturing process, when the fire spreads to the housing, the top and bottom of the carbon dioxide cylinder are blown open by the gas, and the mixed fluid of carbon dioxide gas and liquid impacts and sprays out. The outside of the housing is sprayed with the mixed fluid to block the fire. At the same time, after the mixed fluid breaks through the film ring, it passes through the diversion holes to the surface of the polyethylene pipe, enabling both the inside and outside of the cable to be effectively flame-retarded, solving the problem that existing cables are prone to generating a large amount of smoke and harmful gases during the process of preventing the spread of fire, polluting the surrounding environment.

[0029] 4. For this environmentally friendly cable and its manufacturing process, the mutually offset glue injection holes can effectively prevent the cable from being damaged at this location. When pouring liquid silicone into the inside of the outer sheath, the silicone flows through the heat shrinkable tube to the position between the barrier strip and the polyethylene pipe. Multiple polyethylene pipes are limited on the inner side of the barrier strip, and the liquid silicone fills the gap between the heat shrinkable tube and the outer sheath, enabling the spiral steel wire to be positioned, increasing the overall stiffness and bending resistance of the cable.

[0030] 5. For this environmentally friendly cable and its manufacturing process, the connecting rod sequentially passes through the end face positions of the C-shaped frame and the plastic-coated steel wire, and then the connecting rod is fixedly installed on the surface of the C-shaped frame, thus completing the installation of the plastic-coated steel wire. When the cable is in a dragged state as a whole, the sphere rolls on the surface of the stepped cylinder, effectively reducing the overall dragging friction of the cable. When the cable is bent, the plastic-coated steel wire slides on the inner sides of the first limiting block and the second limiting block, preventing the plastic-coated steel wire from being pulled off, and at the same time, effectively enhancing the overall anti-bending ability and bending ability of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a flowchart of the manufacturing process of the environmentally friendly cable of the present invention;

[0032] Figure 2 is a three-dimensional view of the whole environmentally friendly cable of the present invention;

[0033] Figure 3 is a three-dimensional view of the inside of the environmentally friendly cable of the present invention;

[0034] Figure 4 is a structural schematic diagram of the diversion mechanism of the present invention;

[0035] Figure 5 Schematic diagram of the partial structure of the fixing mechanism of the present invention;

[0036] Figure 6 Schematic diagram of the overall structure of the fixing mechanism of the present invention;

[0037] Figure 7 Schematic diagram of the overall structure of the flame retardant mechanism of the present invention;

[0038] Figure 8 Schematic diagram of the internal structure of the flame retardant mechanism of the present invention;

[0039] Figure 9 Schematic diagram of the protective component of the present invention;

[0040] Figure 10 Schematic diagram of the fixture of the present invention.

[0041] In the figure: 1, barrier strip; 2, diversion mechanism; 21, wire core; 22, spiral sheet; 23, polyethylene tube; 3, fixing mechanism; 31, stepped cylinder; 32, sphere; 33, pressing ring; 34, first limit block; 35, connecting cylinder; 36, connecting plate; 37, internal thread tube; 38, blind tube; 39, shunt tube; 4, flame retardant mechanism; 41, housing; 42, round hole; 43, diversion hole; 44, second limit block; 45, positioning half shell; 46, arc plate; 47, carbon dioxide bottle; 48, film ring; 49, protective arc plate; 5, protective component; 51, fixing ring; 52, fixing platform; 53, heat shrinkable tube; 54, spiral steel wire; 55, outer sheath; 56, bolt; 57, connecting ring; 6, plastic coated steel wire; 7, fixture; 71, C-shaped frame; 72, extension hole; 73, connecting rod. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] The first embodiment: As Figures 1 - 3 shown, the present invention provides a technical solution: an environment-friendly cable, including a barrier strip 1, the inner side of the barrier strip 1 is fixedly connected with a polyethylene tube 23, the inner side of the polyethylene tube 23 is fixedly connected with a spiral sheet 22, the inner side of the spiral sheet 22 is fixedly connected with a wire core 21, and further includes:

[0044] The fixed connection mechanism 3 is fixedly installed at a position near the end face on the surface of the wire core 21. The fixed connection mechanism 3 is used for the introduction and export of the cooling gas between the wire core 21 and the polyethylene pipe 23, and the insulation protection of the surface of the wire core 21;

[0045] The flame retardant mechanism 4 is fixedly installed on the outer surface of the polyethylene pipe 23. The flame retardant mechanism 4 is used for the support and limit of the polyethylene pipe 23 and the blocking of the fire on the outer surface of the polyethylene pipe 23. A plastic coated steel wire 6 is slidably connected between the fixed connection mechanism 3 and the flame retardant mechanism 4, and a fixator 7 is fixedly connected to the end face of the plastic coated steel wire 6;

[0046] The protection component 5 is fixedly installed at the position between the fixed connection mechanism 3 and the flame retardant mechanism 4. The protection component 5 is used for the sealing protection of the outer surface of the polyethylene pipe 23.

[0047] When in use, the diversion mechanism 2 includes a wire core 21, a spiral fin 22 and a polyethylene pipe 23. The support of the spiral fin 22 forms a spiral air flow channel between the wire core 21 and the polyethylene pipe 23. The barrier strip 1 is connected at the position between two fixed connection mechanisms 3, and the protection component 5 is connected at the position between the flame retardant mechanism 4 and the fixed connection mechanism 3. The barrier strip 1 blocks and centers multiple polyethylene pipes 23. The inner side surface of the flame retardant mechanism 4 is in close contact with the outer surface of the polyethylene pipe 23. The inside of the fixed connection mechanism 3 is communicated with the inside of the air flow channel. The fixed connection mechanism 3 simultaneously conveys the cooling gas into the inside of each polyethylene pipe 23. The cooling gas flows along the spiral fin 22 to quickly take away the heat on the surface of the wire core 21. The spiral air flow channel makes the gas more directional, so that the efficiency of the gas flowing to carry away the heat is higher. The flame retardant mechanism 4 blocks the outer side surface of the polyethylene pipe 23, making the cable not easy to catch fire and easy to be flame retarded when on fire.

[0048] The second embodiment: As Figures 3 - 6 shown, the fixed connection mechanism 3 includes a stepped cylinder 31. The inner side surface of the stepped cylinder 31 is fixedly connected with a connecting cylinder 35. The inner side surface of the connecting cylinder 35 is fixedly connected with a connecting plate 36. The inner side surface of the connecting plate 36 is fixedly connected with an internal thread pipe 37. One side of the stepped cylinder 31 far away from the connecting cylinder 35 is fixedly connected with a pressing ring 33;

[0049] The fixed connection mechanism 3 further includes a sphere 32. The sphere 32 is rotatably installed on the outer surface of the stepped cylinder 31. The middle position on the surface of the connecting plate 36 is fixedly connected with a blind pipe 38. The surface of the blind pipe 38 is fixedly connected with a shunt pipe 39;

[0050] One end of the shunt pipe 39 far away from the blind pipe 38 is fixedly connected with the position near the end face on the surface of the polyethylene pipe 23. One side of the stepped cylinder 31 near the sphere 32 is fixedly connected with a first limit block 34.

[0051] During use, the wire core 21 and the polyethylene tube 23 extend to the inner side surface of the internal thread tube 37. The connecting cylinder 35 supports the polyethylene tube 23. The shunt tube 39 communicates with the surface of the polyethylene tube 23, and the axis direction of the shunt tube 39 is inclined and close to the polyethylene tube 23. The cooling gas is delivered to the shunt tube 39 through the blind tube 38. The shunt tube 39 delivers the cooling gas to the inside of the polyethylene tube 23. The inclined air flow makes the air resistance smaller when the cooling gas flows along the spiral fins 22. When the gas flows from one end of the polyethylene tube 23 to the other end, the air flow has a higher efficiency in cooling the wire core 21. The external thread of the internal thread tube 37 is connected to the connection terminal, so that the wire core 21 is connected to the external connection device. During installation, the pressing ring 33 fits tightly with the edge position of the surface of the connecting plate 36. When pouring silica gel to the outside of the polyethylene tube 23, the flowing silica gel fills the space between the connecting cylinder 35 and the connecting plate 36, and the silica gel is not likely to overflow through the edge of the connecting plate 36, solving the problem of how to prevent the cable from burning due to excessive temperature during use.

[0052] The third embodiment: As Figure 7 , Figure 8 shown, the flame retardant mechanism 4 includes a housing 41. A round hole 42 is formed on the inner side surface of the housing 41. The inner side surface of the housing 41 is fixedly connected to the outer surface of the polyethylene tube 23. A diversion hole 43 is formed on the inner side surface of the housing 41 near the polyethylene tube 23. The flame retardant mechanism 4 further includes a second limit block 44. The second limit block 44 is fixedly installed at a position near the edge of the surface of the housing 41. A positioning half shell 45 is fixedly connected to the inner side surface of the housing 41;

[0053] There are two positioning half shells 45, and an arc plate 46 is fixedly connected to the inner side surface of the positioning half shell 45. A carbon dioxide cylinder 47 is fixedly connected to the surface of the arc plate 46. The top of the carbon dioxide cylinder 47 extends to the outer surface of the positioning half shell 45; A thin film ring 48 is fixedly connected to the inner side surface of the housing 41 near the middle. The bottom of the carbon dioxide cylinder 47 is close to the thin film ring 48. A protective arc plate 49 is fixedly connected to the outer surface of the housing 41.

[0054] During use, the polyethylene tube 23 is embedded in the position of the round hole 42, and the housing 41 blocks the entire protective component 5 and the internally filled silica gel. When the cable catches fire, the fire spreads along the silica gel layer and the protective component 5 to the housing 41, and extends to the outside of the protective component 5 on the surface of the housing 41, which can effectively reduce the spread speed of the fire. Both the top and bottom of the carbon dioxide cylinder 47 are set as sealed structures, but the material thickness of the top and bottom of the carbon dioxide cylinder 47 is relatively small during production. When the fire spreads to the housing 41, the top and bottom of the carbon dioxide cylinder 47 are blown open by the gas, and the mixed fluid of carbon dioxide gas and liquid impacts and sprays out. The outside of the housing 41 is sprayed with the mixed fluid, so that the fire is blocked. At the same time, after the mixed fluid breaks through the film ring 48, it passes through the diversion hole 43 to the surface of the polyethylene tube 23, so that both the inside and outside of the cable are effectively flame-retarded, solving the problem that the existing cables are prone to generate a large amount of smoke and harmful gases during the process of preventing the spread of fire, polluting the surrounding environment.

[0055] Fourth Embodiment: As Figure 9 shown, the protective component 5 includes a fixing ring 51, the fixing ring 51 is fixedly installed on the side surface of the housing 41, a plug pin 56 is fixedly connected to the surface of the fixing ring 51, one end of the plug pin 56 away from the fixing ring 51 penetrates through the inside of the housing 41, and a connecting ring 57 is fixedly connected to the end of the plug pin 56 away from the fixing ring 51. Heat shrinkable tubes 53 and an outer sheath 55 are respectively fixedly connected to the surface of the fixing ring 51. A spiral steel wire 54 is fixedly connected between the heat shrinkable tubes 53 and the outer sheath 55. Glue injection holes are formed on the surfaces of the heat shrinkable tubes 53 and the outer sheath 55. A fixing table 52 is fixedly connected to the end of the outer sheath 55 away from the fixing ring 51, and the fixing table 52 is fixedly connected to the inner side surface of the stepped cylinder 31.

[0056] During use, the fixing ring 51 is attached to one side of the housing 41, the plug pin 56 passes through the fixing ring 51 and the housing 41 to the connecting ring 57, and the fixing ring 51 and the connecting ring 57 are fixedly installed on the surface of the housing 41 by welding. Similarly, the fixing table 52 is fixedly installed at a position near the edge on the inner side surface of the stepped cylinder 31. The inner side surface of the heat shrinkable tube 53 is in close contact with the outer surface of the barrier strip 1. The glue injection holes on the surfaces of the heat shrinkable tubes 53 and the outer sheath 55 are arranged in a staggered manner. The hardness of the silica gel cooling and setting material at the glue injection holes is relatively low, and the staggered glue injection holes can effectively prevent the cable from being damaged at this place. When liquid silica gel is poured into the inside of the outer sheath 55, the silica gel flows through the heat shrinkable tube 53 to the position between the barrier strip 1 and the polyethylene tube 23. Multiple polyethylene tubes 23 are limited on the inner side surface of the barrier strip 1, and the liquid silica gel fills the gap between the heat shrinkable tubes 53 and the outer sheath 55, so that the spiral steel wire 54 can be positioned, increasing the overall stiffness and bending resistance of the cable.

[0057] Fifth Embodiment: As Figure 6 、 Figure 7 、Figure 10 As shown in the figure, the sphere 32 is rotatably mounted on the outer surface of the stepped cylinder 31. In the middle position of the surface of the connecting plate 36, a blind tube 38 is fixedly connected, and a shunt tube 39 is fixedly connected to the surface of the blind tube 38.

[0058] One end of the shunt tube 39 away from the blind tube 38 is fixedly connected to a position on the surface of the polyethylene tube 23 close to the end face. On one side of the surface of the stepped cylinder 31 close to the sphere 32, a first limiting block 34 is fixedly connected.

[0059] The second limiting block 44 is fixedly installed at a position on the surface of the housing 41 close to the edge. The inner side surface of the housing 41 is fixedly connected with a positioning half-shell 45.

[0060] The fixer 7 includes a C-shaped frame 71. An extension hole 72 is formed on the inner side surface of the C-shaped frame 71. The end face of the C-shaped frame 71 close to the extension hole 72 is fixedly connected with the end face of the plastic-coated steel wire 6. A connecting rod 73 is fixedly connected to the inner side surface of the C-shaped frame 71.

[0061] During use, second limiting blocks 44 are arranged at positions on both sides of the housing 41 close to the edge, and the number of the second limiting blocks 44 is multiple. Correspondingly, multiple first limiting blocks 34 are also arranged at positions on the surface of the stepped cylinder 31 close to the edge. The plastic-coated steel wire 6 sequentially passes through the second limiting blocks 44 and the oppositely arranged first limiting blocks 34. After the plastic-coated steel wire 6 completes multiple penetrations, both ends of the plastic-coated steel wire 6 are inserted into the interior of the extension hole 72. The connecting rod 73 sequentially passes through the C-shaped frame 71 and the end face position of the plastic-coated steel wire 6, and then the connecting rod 73 is fixedly installed on the surface of the C-shaped frame 71, thereby completing the installation of the plastic-coated steel wire 6. When the cable is in a dragging state as a whole, the sphere 32 rolls on the surface of the stepped cylinder 31, effectively reducing the overall dragging friction of the cable. When the cable is bent, the plastic-coated steel wire 6 slides on the inner side surfaces of the first limiting block 34 and the second limiting block 44, preventing the plastic-coated steel wire 6 from being broken. At the same time, the overall anti-bending ability and bending ability of the cable can be effectively enhanced.

[0062] Sixth Embodiment: As Figures 1 - 10 shown: A preparation process of an environment-friendly cable includes the following steps:

[0063] Step 1. Conductor structure manufacturing: At room temperature, a copper rod is drawn into copper wires, the copper wires are heated and kept warm, and then the copper wires are naturally cooled. The copper wires are stranded by using a multi-strand single-wire stranding method to form a copper stranded wire. A traction machine is used to traction the copper stranded wire to be coated into the interior of an injection extrusion machine to coat cross-linked polyethylene, completing the preparation of the wire core 21. Similarly, six wire cores 21 are prepared.

[0064] Step 2: Installation of the cooling structure. Plastic and rubber particles are put into an injection and extrusion machine. The molten plastic is formed into a barrier strip 1 through a die. A spiral piece 22 is sleeved on the outer surface of the wire core 21 prepared in Step 1. A polyethylene tube 23 is sleeved outside the spiral piece 22. The inner side surface of the polyethylene tube 23 is made to closely adhere to the outer surface of the spiral piece 22 by heating. The combined overall structure is placed on the inner side surface of the barrier strip 1 for preliminary gluing and positioning.

[0065] Step 3: Installation of the flame-retardant structure. The housing 41 is slid to a determined position on the outer surface of the polyethylene tube 23, with the diversion holes 43 opposite to the polyethylene tube 23. The second limit blocks 44 are successively spot-welded at positions on the surface of the housing 41 close to the edge. The film ring 48 is wound around the inner side surface of the housing 41 close to the round hole 42. The arc-shaped plate 46 is fixedly installed on the inner side surface of the positioning half-shell 45, and then the two positioning half-shells 45 are butt-jointed and fixedly installed on the inner side surface of the housing 41, and multiple carbon dioxide cylinders 47 are supported and limited.

[0066] Step 4: Installation of the support structure. The connecting cylinder 35 is sleeved on the end face position of the overall structure in Step 2. The connecting plate 36 slides into the inner side surface of the connecting cylinder 35. A hole is opened at a position on the surface of the polyethylene tube 23 close to the end face, and the end face of the wire core 21 extends into the inner part of the inner-threaded tube 37. The shunt tube 39 is glued and sealed at the opening position on the surface of the polyethylene tube 23. Subsequently, the stepped cylinder 31 is integrally welded and installed on the surface of the connecting plate 36, and multiple first limit blocks 34 are successively spot-welded at the end face position of the stepped cylinder 31.

[0067] It should be noted that in this article, relational terms such as first and second 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

Claims

1. An environmentally friendly cable, including a barrier strip (1), characterized in that, The inner side of the barrier strip (1) is fixedly connected with a polyethylene tube (23). The inner side of the polyethylene tube (23) is fixedly connected with a spiral piece (22). The inner side of the spiral piece (22) is fixedly connected with a wire core (21). Further included are: A fixing mechanism (3), which is fixedly installed at a position on the surface of the wire core (21) close to the end face. The fixing mechanism (3) is used for the introduction and export of cooling gas between the wire core (21) and the polyethylene tube (23) and the insulation protection of the surface of the wire core (21); A flame retardant mechanism (4), which is fixedly installed on the outer surface of the polyethylene tube (23). The flame retardant mechanism (4) is used for the support and limitation of the polyethylene tube (23) and the barrier of the fire on the outer surface of the polyethylene tube (23). A plastic-coated steel wire (6) is slidably connected between the fixing mechanism (3) and the flame retardant mechanism (4). The end face of the plastic-coated steel wire (6) is fixedly connected with a fixer (7); A protection component (5), which is fixedly installed at a position between the fixing mechanism (3) and the flame retardant mechanism (4). The protection component (5) is used for the sealing protection of the outer surface of the polyethylene tube (23); Wherein the fixing mechanism (3) includes a stepped cylinder (31). The inner side of the stepped cylinder (31) is fixedly connected with a connecting cylinder (35). The inner side of the connecting cylinder (35) is fixedly connected with a connecting plate (36). The inner side of the connecting plate (36) is fixedly connected with an internally threaded tube (37). The side of the stepped cylinder (31) away from the connecting cylinder (35) is fixedly connected with a pressing ring (33); The fixing mechanism (3) further includes a sphere (32), which is rotatably installed on the outer surface of the stepped cylinder (31). The middle position of the surface of the connecting plate (36) is fixedly connected with a blind tube (38). The surface of the blind tube (38) is fixedly connected with a shunt tube (39). The cooling gas is transported to the shunt tube (39) through the blind tube (38); One end of the shunt tube (39) away from the blind tube (38) is fixedly connected with a position on the surface of the polyethylene tube (23) close to the end face. A first limiting block (34) is fixedly connected to the side of the stepped cylinder (31) close to the sphere (32).

2. An environment-friendly cable according to claim 1, characterized in that: The flame retardant mechanism (4) includes a housing (41). A round hole (42) is opened on the inner side of the housing (41). The inner side of the housing (41) is fixedly connected with the outer surface of the polyethylene tube (23). A diversion hole (43) is opened at a position on the inner side of the housing (41) close to the polyethylene tube (23).

3. An environment-friendly cable according to claim 2, characterized in that: The flame retardant mechanism (4) further includes a second limiting block (44), which is fixedly installed at a position on the surface of the housing (41) close to the edge. The inner side of the housing (41) is fixedly connected with a positioning half shell (45).

4. An environment-friendly cable according to claim 3, wherein: There are two positioning half-shells (45), and an arc-shaped plate (46) is fixedly connected to the inner side surface of the positioning half-shell (45). A carbon dioxide cylinder (47) is fixedly connected to the surface of the arc-shaped plate (46), and the top of the carbon dioxide cylinder (47) extends to the outer surface of the positioning half-shell (45).

5. An environment-friendly cable according to claim 4, characterized in that: A thin film ring (48) is fixedly connected to the inner side surface of the housing (41) near the middle position. The bottom of the carbon dioxide cylinder (47) is close to the thin film ring (48), and a protective arc plate (49) is fixedly connected to the outer surface of the housing (41).

6. An environment-friendly cable according to claim 5, characterized in that: The protection component (5) includes a fixing ring (51). The fixing ring (51) is fixedly installed on the side surface of the housing (41). A plug pin (56) is fixedly connected to the surface of the fixing ring (51), and one end of the plug pin (56) away from the fixing ring (51) penetrates into the interior of the housing (41).

7. An environment-friendly cable according to claim 6, characterized in that: A connecting ring (57) is fixedly connected to one end of the plug pin (56) away from the fixing ring (51). A heat shrinkable tube (53) and an outer sheath (55) are respectively fixedly connected to the surface of the fixing ring (51). A spiral steel wire (54) is fixedly connected to the position between the heat shrinkable tube (53) and the outer sheath (55).

8. The preparation process of an environment-friendly cable according to claim 7, characterized in that: It includes the following steps: Step 1: Conductor structure manufacturing. At room temperature, a copper bar is drawn into a copper wire. The copper wire is heated and kept warm, and then naturally cooled. The copper wire is stranded in a way of twisting multiple single wires to form a copper stranded wire. A traction machine is used to draw the copper stranded wire to be coated into the interior of an injection extrusion machine to coat cross-linked polyethylene, completing the preparation of the wire core (21). Similarly, six wire cores (21) are prepared. Step 2: Installation of the cooling structure. Plastic and rubber particles are put into an injection extrusion machine. The molten plastic is formed into a barrier strip (1) through a die. A spiral sheet (22) is sleeved on the outer surface of the wire core (21) prepared in Step 1. A polyethylene tube (23) is sleeved on the outside of the spiral sheet (22). By heating, the inner side surface of the polyethylene tube (23) is made to closely adhere to the outer surface of the spiral sheet (22). The combined overall structure is placed on the inner side surface of the barrier strip (1) for preliminary gluing and positioning. Step 3: Installation of the flame retardant structure. The housing (41) is slid to a determined position on the outer surface of the polyethylene tube (23), and the diversion hole (43) is opposite to the polyethylene tube (23). The second limiting block (44) is successively spot-welded to the position on the surface of the housing (41) near the edge. The thin film ring (48) is wound around the inner side surface of the housing (41) near the round hole (42). An arc-shaped plate (46) is fixedly installed on the inner side surface of the positioning half-shell (45). Then, the two positioning half-shells (45) are butt-jointed and fixedly installed on the inner side surface of the housing (41), and multiple carbon dioxide cylinders (47) are supported and limited. Step 4. Installation of the support structure: sleeved the connecting cylinder (35) at the end face position of the overall structure in Step 2, slid the connecting plate (36) into the inner side surface of the connecting cylinder (35), drilled holes at the position on the surface of the polyethylene pipe (23) close to the end face, extended the end face of the wire core (21) into the interior of the internally threaded pipe (37), glued and sealed the shunt pipe (39) at the position of the opening on the surface of the polyethylene pipe (23), then integrally welded and installed the stepped cylinder (31) on the surface of the connecting plate (36), and sequentially spot-welded a plurality of first limiting blocks (34) at the end face position of the stepped cylinder (31).

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