Environment-friendly safe low-smoke halogen-free cable

Abstract

The invention discloses an environment-friendly safe low-smoke halogen-free cable, and relates to the technical field of cables, the environment-friendly safe low-smoke halogen-free cable comprises a cable assembly, the cable assembly comprises an outer sheath, the outer surface of the outer sheath is fixedly communicated with an air outlet assembly, a plurality of conductors are arranged in the outer sheath, each conductor is hollow, and the outer surface of the outer sheath is fixedly communicated with the air outlet assembly. A plurality of filling pipes are arranged among the exteriors of the plurality of conductors, and the plurality of filling pipes are hollow; according to the environment-friendly safe low-smoke halogen-free cable, when the temperature of air around the cable is low, cold air enters the hollow conductor from the air inlet, air convection is formed in the conductor, heat is taken away and then discharged from the air outlet, and when excessive heat is generated in the use process of the conductor, the heat can enter the filling pipe through the multiple drainage holes, so that the cable is protected. And heat can flow in the conductor, so that excessive local heat dissipation of the conductor can be prevented.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to an environmentally friendly, safe, low-smoke, halogen-free cable. Background Art

[0002] The insulation and sheath materials of traditional cables are made of halogen-containing polymers. When a fire occurs, these halogen-containing materials will release a large amount of toxic smoke and corrosive gases. For example, toxic gases such as hydrogen chloride gas not only seriously hinder the escape and rescue of personnel, but also damage electrical equipment, accelerate equipment aging and failure. In addition, thick smoke will reduce visibility, making it difficult for personnel to identify directions at the fire scene, greatly threatening people's lives and safety. In places with dense crowds and difficult evacuation, such as buildings, rail transit, and ships, fire safety standards are becoming more and more stringent, so halogen-free cables are more worthy of promotion.

[0003] Existing, such as Chinese patent publication number: CN111187484B, discloses a waterproof halogen-free flame-retardant cable, including a cable body, a clamping ring, a cable connector and a connecting ring, the front end of the cable body is fixedly connected to the clamping ring; the front end of the clamping ring is fixedly connected to the cable connector; the cable connector can be mutually clamped with the connecting ring, and clamping holes are provided in the upper and lower end walls of the cable connector; the right end of the clamping hole is circular, and the left end is a parallelogram.

[0004] There are already some low-smoke halogen-free cables on the market. However, when used in high-temperature environments, the current low-smoke halogen-free cables have limited heat resistance. The heat inside the cable is difficult to dissipate outward, and the resistance of the metal conductor will increase with the increase in temperature. The increase in the resistance of the cable conductor will cause more heat to be generated when current passes through, thus forming a vicious circle, which can easily aggravate the internal heating of the cable, not only reducing the transmission efficiency of the cable, but also increasing the energy consumption of the cable. In severe cases, it may cause a fire, posing a major safety hazard.

[0005] Therefore, we proposed an environmentally friendly and safe low-smoke halogen-free cable to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide an environmentally friendly and safe low-smoke halogen-free cable to solve the problem raised in the above background technology that the internal heat of the existing low-smoke halogen-free cable is difficult to dissipate outwards, thereby exacerbating the safety hazard caused by the internal heating of the cable.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an environmentally friendly and safe low-smoke halogen-free cable, comprising a cable assembly, the cable assembly comprising an outer sheath, the outer surface of the outer sheath being fixedly connected to an air outlet assembly, a plurality of conductors being arranged inside the outer sheath, and each conductor being hollow, a plurality of filling tubes being arranged outside the plurality of the conductors, the plurality of filling tubes being hollow, and the plurality of filling tubes being used to dissipate the heat generated by the conductor inside the cable, a plurality of drainage holes being provided on the inner wall of each of the filling tubes on the side facing between two adjacent conductors, the plurality of drainage holes being used to allow the heat generated by the conductor to flow into the filling tube; the air outlet assembly comprising an air outlet, the air outlet being used to dissipate the hot air inside the outer sheath to the outside; the insulating sleeve being used to prevent current leakage and short circuit between different conductors, the shielding layer being woven from metal copper wires for shielding, and having a good shielding effect, and being able to effectively suppress the influence of external electromagnetic interference on the internal signal of the cable, and also being able to prevent the internal signal of the cable from being transmitted to the outside The fixed core arranged between the three conductors is a hemp rope, which has little effect on the bending performance of the cable and can fill the gaps between the three conductors. When the air temperature around the cable is low, cold air enters the hollow conductor from the air inlet, forms air convection inside, takes away the heat and is discharged from the air outlet. When the conductor generates too much heat during use, the heat will enter the filling tube through multiple drainage holes, and the heat can flow inside it, thereby preventing excessive local heat dissipation of the conductor. The material used in the filling area is foamed polyethylene. The outer sheath is the outermost protective structure of the cable, which can protect the conductor inside the cable from mechanical damage, chemical corrosion and environmental factors. The material of the outer sheath is also low-smoke and halogen-free. The memory spring is made of shape memory alloy in a spring shape. At low temperatures, the memory spring contracts and pulls the wind block of the vent. When the heat inside the outer sheath is too high, the memory spring stretches, which will push the wind block to open the heat dissipation slot, so that the heat is dissipated from the heat dissipation slot.

[0008] Preferably, the inner wall of the air outlet is fixedly connected to a fixing frame, the outer surface of the fixing frame is fixedly connected to a memory spring, and the memory spring is made of memory metal, and one end of the memory spring is fixedly connected to a wind blocking block.

[0009] Preferably, the outer surface of the wind block is slidably connected to the inner wall of the air outlet, and a plurality of heat dissipation grooves are evenly arranged on the outer surface of the wind block along the circumferential direction, and the plurality of heat dissipation grooves are all used for dissipating heat.

[0010] Preferably, the outer surfaces of the plurality of conductors are wrapped with insulating sleeves, the outer surfaces of the plurality of insulating sleeves are wrapped with shielding sleeves, and the shielding sleeves are a mesh structure woven from copper wires, and the outer surface of the shielding sleeves is in contact with the outer surface of the filling tube.

[0011] Preferably, a fixed core is arranged between the plurality of the shielding sleeves, and the fixed core is used to increase the toughness of the cable, and a filling area is arranged between the outside of the plurality of the shielding sleeves and the plurality of filling tubes and the inside of the outer sheath; the anti-corrosion layer is used to prevent the outer sheath of the cable from being chemically corroded during outdoor use, and the anti-corrosion layer is made of chloroprene rubber, which has good chemical corrosion resistance and good tolerance to common acids and alkalis, and can prevent the outer sheath from being corroded; a reinforcing layer is arranged inside the anti-corrosion layer to improve the mechanical strength of the outer sheath of the cable, and can prevent the outer sheath from being damaged when stretched, extruded, or impacted; glass fiber cloth is used, which has good tensile and tear resistance, is relatively light in weight, and can protect the interior from mechanical damage. The main function of the waterproof layer is to prevent external moisture from entering the cable on a large scale. High-density polyethylene is used as the waterproof layer. It has a dense molecular structure and can effectively prevent moisture penetration. The thermal insulation layer set inside it is mainly used to prevent the cable temperature from being too low in a cold environment and affecting the performance. It can reduce the heat exchange between the cable and the external environment and keep the temperature inside the cable within an appropriate range. Rock wool is used. Rock wool is an inorganic thermal insulation material with good thermal insulation properties and a low thermal conductivity. The heat-resistant layer used on the outermost layer is made of polyimide, which can withstand higher temperatures and ensure that the cable is within the normal operating temperature range. The overall performance of the outer sheath will not be degraded due to internal heat conduction.

[0012] Preferably, the outer sheath includes an anti-corrosion layer made of chloroprene rubber, a reinforcing layer is arranged on the inner wall of the anti-corrosion layer, and the reinforcing layer is made of glass fiber cloth, a waterproof layer is arranged on the inner wall of the reinforcing layer, and the material used for the waterproof layer is high-density polyethylene.

[0013] Preferably, an insulation layer is arranged on the inner wall of the waterproof layer, and the material of the insulation layer is rock wool; a heat-resistant layer is arranged on the inner wall of the insulation layer, and the heat-resistant layer is made of polyimide material to prevent external heat from being transferred to the inside of the cable.

[0014] Preferably, a reinforcement component is installed on the outer surface of the outer sheath, and the reinforcement component includes a reinforcement hoop, and the reinforcement hoop is used to enhance the tear resistance of the cable.

[0015] Preferably, one end of the reinforcement hoop is fixedly connected to the ferrule, and the other end of the reinforcement hoop is inserted into the interior of the ferrule. The other end of the reinforcement hoop is fixedly connected to a plurality of limit strips, and a plurality of limit grooves are provided on an inner wall of one side of the ferrule, and the outer diameter of the limit strip matches the inner diameter of the limit groove.

[0016] Preferably, a threaded hole is provided on the outer surface of one side of the ferrule, and the inner wall of the threaded hole is threadedly connected to a fastening screw, and the fastening screw is used to strengthen the connection between the other end of the reinforcing hoop and the inner wall of the ferrule; in order to ensure the outer sheath and the internal conductor and prevent them from cracking when torn, the reinforcing hoop is first sleeved on the outside of the outer sheath, and one end of the reinforcing hoop with the limiting strip fixed thereon is inserted into the ferrule, and a plurality of limiting grooves are provided on the inner wall of the ferrule, and the limiting grooves and the limiting strips can be snapped together. When one end of the reinforcing hoop is inserted into the interior of the ferrule, the connection can be strengthened. At this time, the fastening screw is inserted into the interior of the threaded hole and rotated to tighten. When tightening, the fastening screw is tightly against the reinforcing hoop, so that the connection between the reinforcing hoop and the ferrule is tightened, thereby completing the reinforcement of the outer sheath and preventing the outer sheath from expanding and tearing.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, when in use, the insulating sleeve is used to prevent current leakage and short circuit between different conductors. The shielding layer is woven from metal copper wires, which has a good shielding effect and can effectively suppress the influence of external electromagnetic interference on the internal signal of the cable. At the same time, it can also prevent the internal signal of the cable from interfering with the outside world. The fixed core arranged between the three conductors is a hemp rope, which has little effect on the bending performance of the cable and can fill the gaps between the three conductors. When the air temperature around the cable is low, cold air enters the hollow conductor from the air inlet, forming air convection inside, taking away the heat and then discharging it from the air outlet. When the conductor generates too much heat during use When the temperature is high, the heat will enter the filling tube through multiple drainage holes, and the heat can flow inside the filling tube, thereby preventing excessive local heat dissipation of the conductor. The material used in the filling area is foamed polyethylene. The outer sheath is the outermost protective structure of the cable, which can protect the conductor inside the cable from mechanical damage, chemical corrosion and environmental factors. The material of the outer sheath is also low-smoke and halogen-free. The memory spring is made of shape memory alloy in a spring shape. At low temperatures, the memory spring contracts and pulls the wind block of the vent. When the heat inside the outer sheath is too high, the memory spring stretches, which will push the wind block to open the heat dissipation slot, allowing the heat to dissipate from the heat dissipation slot.

[0018] 2. In the present invention, when in use, the anti-corrosion layer is used to prevent the outer sheath of the cable from being chemically corroded during outdoor use. The anti-corrosion layer is made of chloroprene rubber, which has good chemical corrosion resistance and good tolerance to common acids and alkalis, and can prevent the outer sheath from being corroded. The reinforcement layer is arranged inside the anti-corrosion layer to improve the mechanical strength of the outer sheath of the cable, and can prevent the outer sheath from being damaged when stretched, squeezed, and impacted. The glass fiber cloth is used, which has good tensile and tear resistance and is relatively light in weight, and can protect the interior from mechanical damage. The main function of the waterproof layer is to prevent external moisture from entering the interior of the cable over a large area. High-density polyethylene is used as the waterproof layer, which has a dense molecular structure and can effectively prevent the penetration of water. The thermal insulation layer set inside it is mainly used to prevent the cable temperature from being too low and affecting the performance in a cold environment. It can reduce the heat exchange between the cable and the external environment and keep the temperature inside the cable within an appropriate range. Rock wool is used. Rock wool is an inorganic thermal insulation material with good thermal insulation material and low thermal conductivity. The heat-resistant layer used on the outermost layer is made of polyimide, which can withstand higher temperatures. It can ensure that the cable is within the normal operating temperature range and the overall performance of the outer sheath will not be degraded due to internal heat conduction.

[0019] 3. When the present invention is in use, in order to ensure the outer sheath and the internal conductor and prevent them from cracking when torn, the reinforcing hoop is first sleeved on the outside of the outer sheath, and one end of the reinforcing hoop with the limit strip fixed thereon is inserted into the sleeve, and a plurality of limit grooves are opened on the inner wall of the sleeve, and the limit grooves and the limit strips can be snapped together. When one end of the reinforcing hoop is inserted into the sleeve, the connection can be strengthened. At this time, a fastening screw is inserted into the threaded hole and rotated to tighten. When tightening, the fastening screw is tightly against the reinforcing hoop, so that the connection between the reinforcing hoop and the sleeve is tightened, thereby completing the reinforcement of the outer sheath and preventing the outer sheath from expanding and tearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A side perspective view of an environmentally friendly and safe low-smoke halogen-free cable according to the present invention; Figure 2 It is a front perspective view of an environmentally friendly and safe low-smoke halogen-free cable of the present invention; Figure 3 It is a perspective view of the structure of a cable assembly of an environmentally friendly and safe low-smoke halogen-free cable of the present invention; Figure 4 It is a partial cutaway perspective view of an air outlet component of an environmentally friendly and safe low-smoke halogen-free cable of the present invention; Figure 5 This is a perspective view of the structure of a reinforcement component of an environmentally friendly and safe low-smoke halogen-free cable according to the present invention; Figure 6 It is a three-dimensional diagram of the structure of the reinforcement component of an environmentally friendly and safe low-smoke halogen-free cable of the present invention at another angle; Figure 7 This is a schematic diagram of the outer sheath structure of an environmentally friendly and safe low-smoke halogen-free cable of the present invention; Figure 8 The diagram is a gas flow diagram inside the outer sheath of an environmentally friendly and safe low-smoke halogen-free cable according to the present invention.

[0021] In the figure: 1. Cable assembly; 101. Outer sheath; 1011. Anti-corrosion layer; 1012. Reinforcement layer; 1013. Waterproof layer; 1014. Insulation layer; 1015. Heat-resistant layer; 102. Filling area; 103. Filling tube; 104. Conductor; 105. Insulation sleeve; 106. Shielding sleeve; 107. Fixed core; 108. Drainage hole; 2. Reinforcement assembly; 201. Reinforcement hoop; 202. Card sleeve; 203. Limiting groove; 204. Threaded hole; 205. Fastening screw; 206. Limiting strip; 3. Air outlet assembly; 301. Air outlet; 302. Wind block; 303. Heat dissipation slot; 304. Memory spring; 305. Fixing bracket. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described 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 creative work are within the scope of protection of the present invention.

[0023] Example 1: Reference Figure 1 - Figure 8As shown, the present invention provides a technical solution: an environmentally friendly and safe low-smoke halogen-free cable, comprising a cable assembly 1, the cable assembly 1 comprising an outer sheath 101, the outer surface of the outer sheath 101 is fixedly connected to the air outlet assembly 3, a plurality of conductors 104 are arranged inside the outer sheath 101, and each conductor 104 is hollow, a plurality of filling tubes 103 are arranged outside the plurality of conductors 104, the plurality of filling tubes 103 are hollow, and the plurality of filling tubes 103 are used to dissipate the heat generated by the conductors 104 inside the cable, and a plurality of drainage holes 108 are provided on the inner wall of each filling tube 103 facing the side between two adjacent conductors 104 , a plurality of drainage holes 108 are used to allow the heat generated by the conductor 104 to flow into the filling tube 103; the air outlet component 3 includes an air outlet 301, the air outlet 301 is used to dissipate the hot air inside the outer sheath 101 to the outside, the inner wall of the air outlet 301 is fixedly connected to the fixing frame 305, the outer surface of the fixing frame 305 is fixedly connected to the memory spring 304, and the memory spring 304 is made of memory metal, one end of the memory spring 304 is fixedly connected to the wind block 302, the outer surface of the wind block 302 is slidably connected to the inner wall of the air outlet 301, and the outer surface of the wind block 302 is evenly provided with a plurality of heat dissipation grooves 303 along the circumferential direction, and the plurality of heat dissipation grooves 303 are used In order to dissipate heat, the outer surfaces of the multiple conductors 104 are all wrapped with insulating sleeves 105, and the outer surfaces of the multiple insulating sleeves 105 are all wrapped with shielding sleeves 106, and the shielding sleeve 106 is a mesh structure woven by copper wires. The outer surface of the shielding sleeve 106 contacts the outer surface of the filling tube 103, and a fixed core 107 is arranged between the opposite sides of the multiple shielding sleeves 106, and the fixed core 107 is used to increase the toughness of the cable. A filling area 102 is arranged between the outside of the multiple shielding sleeves 106 and the multiple filling tubes 103 and the inside of the outer sheath 101, and the outer sheath 101 includes an anti-corrosion layer 1011, and the anti-corrosion layer 1011 is made of chloroprene rubber, and the anti-corrosion layer 1011 A reinforcement layer 1012 is arranged on the inner wall of the cable, and the reinforcement layer 1012 is made of glass fiber cloth. A waterproof layer 1013 is arranged on the inner wall of the reinforcement layer 1012, and the material of the waterproof layer 1013 is high-density polyethylene. A thermal insulation layer 1014 is arranged on the inner wall of the waterproof layer 1013, and the material of the thermal insulation layer 1014 is rock wool. A heat-resistant layer 1015 is arranged on the inner wall of the thermal insulation layer 1014, and the heat-resistant layer 1015 is made of polyimide material to prevent external heat from being transferred to the inside of the cable. A reinforcement component 2 is installed on the outer surface of the outer sheath 101, and the reinforcement component 2 includes a reinforcement hoop 201, and the reinforcement hoop 201 is used to enhance the tear resistance of the cable.

[0024] In this embodiment, when in use, the conductors 104 are arranged in three, and the halogen-free cable is a three-core cable as a whole. The three conductors 104 are arranged in an equilateral triangle around the hollow area, which has stability. The conductor 104 is designed to be a hollow cylindrical shape, and high-strength copper is used to be extruded into a hollow tube to form a hollow conductor 104. Both ends of the conductor 104 are ventilated, one end is an air inlet, and the other end is an air outlet. When the air temperature around the cable is low, cold air enters the hollow conductor 104 from the air inlet, forming air convection inside, taking away the heat and then being discharged from the air outlet. An insulating sleeve 105 is wrapped around the outside of each conductor 104. The insulating sleeve 105 is a key part wrapped around the outside of the conductor 104, which is used to prevent current leakage and The short circuit between different conductors 104, in the halogen-free cable, the material of the insulating sleeve 105 is mainly a low-smoke halogen-free polymer, and ethylene vinyl acetate copolymer is used, which has good flexibility and good water resistance and chemical corrosion resistance. A shielding sleeve 106 is wrapped outside the insulating sleeve 105. The shielding layer 106 is woven from metal copper wires, that is, the copper wires are woven into a mesh structure and wrapped around the outside of the insulating sleeve 105. The shielding effect is good and can effectively suppress the influence of external electromagnetic interference on the internal signal of the cable. At the same time, it can also prevent the internal signal of the cable from interfering with the outside. The higher the braiding density, the better the shielding effect. In addition, a fixed core 107 is set between the three conductors 104. The fixed core 107 is a hemp rope. The hemp rope It is relatively soft, has little effect on the bending performance of the cable, and can fill the gaps between the three conductors 104. The multiple drainage holes 108 opened on the filling tube 103 have the function of heat circulation. When the conductor 104 generates too much heat during use, the heat will enter the filling tube 103 through the multiple drainage holes 108. The filling tube 103 is hollow inside, and heat can flow inside it, thereby preventing the conductor 104 from dissipating excessive local heat. The material used in the filling area 102 is foamed polyethylene, which is light in weight and has good buffering performance. It can ensure the roundness of the cable and reduce the overall weight of the cable. The outer sheath 101 is the outermost protective structure of the cable, which can protect the cable The internal conductor 104 is protected from mechanical damage, chemical corrosion and environmental factors. The material of the outer sheath 101 is also low-smoke and halogen-free. The memory spring 304 is made of a shape memory alloy in a spring shape. At low temperatures, the memory spring 304 contracts and pulls the air block 302 of the vent. When the heat inside the outer sheath 101 is too high, the memory spring 304 stretches and pushes the air block 302 to open the heat dissipation slot 303, so that the heat is dissipated from the heat dissipation slot 303. The function of the fixing frame 305 is to complete the installation of the memory spring 304. The anti-corrosion layer 1011 can prevent the environment from causing corrosion to the inner core wire of the outer sheath 101. The reinforcement layer 1012 increases the firmness. The waterproof layer 1013 has the function of preventing large-area water seepage inside the outer sheath 101.The heat-insulating layer 1014 and the heat-resistant layer 1015 prevent the internal core wire from being damaged by high heat and low temperature. To prevent tearing, the outer sheath 101 is reinforced by the reinforcement component 2.

[0025] Embodiment 2: Figure 1 - Figure 8 As shown, the cable assembly 1 includes an outer sheath 101, the outer sheath 101 includes an anti-corrosion layer 1011, and the anti-corrosion layer 1011 is made of chloroprene rubber, the inner wall of the anti-corrosion layer 1011 is provided with a reinforcing layer 1012, and the reinforcing layer 1012 is made of glass fiber cloth, the inner wall of the reinforcing layer 1012 is provided with a waterproof layer 1013, and the material of the waterproof layer 1013 is high-density polyethylene, the inner wall of the waterproof layer 1013 is provided with a thermal insulation layer 1014, and the material of the thermal insulation layer 1014 is rock wool, the inner wall of the thermal insulation layer 1014 is provided with a heat-resistant layer 1015, and the heat-resistant layer 1015 is made of polyimide material to prevent external heat from being transferred to the inside of the cable.

[0026] In this embodiment, when in use, the outer sheath 101 is composed of an anti-corrosion layer 1011, a reinforcement layer 1012, a waterproof layer 1013, an insulation layer 1014, and a heat-resistant layer 1015 from the outside to the inside. The anti-corrosion layer 1011 is the outermost layer of the outer sheath 101, and is used to prevent the outer sheath 101 from being chemically corroded during outdoor use of the cable. When the cable is used in some harsh environments, it will come into contact with corrosive substances, such as components in acid rain. The anti-corrosion layer 1011 is made of chloroprene rubber, which has good chemical corrosion resistance and good tolerance to common acids and alkalis, and can prevent the outer sheath 101 from being corroded. The reinforcement layer 1012 is arranged inside the anti-corrosion layer 1011 to improve the mechanical strength of the cable outer sheath 101, and can prevent the outer sheath 101 from being damaged when stretched, squeezed, or impacted. Glass fiber cloth is used, and glass fiber cloth has good tensile and tear resistance. It is relatively light in weight and can protect the interior from mechanical damage. The main function of the waterproof layer 1013 is to prevent external moisture from entering the cable on a large scale. High-density polyethylene is used as the waterproof layer 1013, which has a dense molecular structure and can effectively prevent moisture penetration. The thermal insulation layer 1014 arranged inside it is mainly used to prevent the cable temperature from being too low in a cold environment and affecting the performance. It can reduce the heat exchange between the cable and the external environment and keep the temperature inside the cable within a suitable range. Rock wool is used. Rock wool is an inorganic thermal insulation material with good thermal insulation material and low thermal conductivity. The heat-resistant layer 1015 used in the outermost layer is made of polyimide, which can withstand higher temperatures and can withstand more than 400°C in a short period of time. It can ensure that the cable is within the normal operating temperature range and the outer sheath 101 as a whole will not experience performance degradation due to internal heat conduction.

[0027] Embodiment three: Figure 1 - Figure 8 As shown, a reinforcement component 2 is installed on the outer surface of the outer sheath 101, and the reinforcement component 2 includes a reinforcement hoop 201, and the reinforcement hoop 201 is used to enhance the tear resistance of the cable, one end of the reinforcement hoop 201 is fixedly connected to the ferrule 202, and the other end of the reinforcement hoop 201 is inserted into the interior of the ferrule 202, and the other end of the reinforcement hoop 201 is fixedly connected to a plurality of limit strips 206, and a plurality of limit grooves 203 are provided on the inner wall of one side of the ferrule 202, and the outer diameter of the limit strip 206 matches the inner diameter of the limit groove 203, and a threaded hole 204 is provided on the outer surface of one side of the ferrule 202, and the inner wall of the threaded hole 204 is threadedly connected to a fastening screw 205, and the fastening screw 205 is used to enhance the connection between the other end of the reinforcement hoop 201 and the inner wall of the ferrule 202.

[0028] In this embodiment, when in use, in order to ensure the outer sheath 101 and the internal conductor 104 to prevent them from cracking when torn, the reinforcing hoop 201 is first put on the outside of the outer sheath 101, and the end of the reinforcing hoop 201 fixed with the limiting strip 206 is inserted into the sleeve 202, and a plurality of limiting grooves 203 are opened on the inner wall of the sleeve 202, and the limiting grooves 203 and the limiting strips 206 can be snapped together. When one end of the reinforcing hoop 201 is inserted into the sleeve 202, the connection can be strengthened. At this time, the fastening screw 205 is inserted into the threaded hole 204 and rotated to tighten. When tightening, the fastening screw 205 is tightly against the reinforcing hoop 201, so that the connection between the reinforcing hoop 201 and the sleeve 202 is tightened, thereby completing the reinforcement of the outer sheath 101 and preventing the outer sheath 101 from expanding and tearing.

[0029] The method of use and working principle of the device: When in use, the conductor 104 is arranged in three, and the halogen-free cable is a three-core cable as a whole. The three conductors 104 are arranged in an equilateral triangle around the hollow area, which has stability. The conductor 104 is designed to be a hollow cylindrical shape. High-strength copper is used to be extruded into a hollow tube to form a hollow conductor 104. Both ends of the conductor 104 are ventilated, one end is an air inlet, and the other end is an air outlet. When the air temperature around the cable is low, cold air enters the hollow conductor 104 from the air inlet, forming air convection inside, taking away the heat and then being discharged from the air outlet. An insulating sleeve 105 is wrapped around the outside of each conductor 104. The insulating sleeve 105 is a key part wrapped around the outside of the conductor 104 and is used for To prevent current leakage and short circuit between different conductors 104, in halogen-free cables, the material of the insulating sleeve 105 is mainly a low-smoke halogen-free polymer, and ethylene vinyl acetate copolymer is used, which has good flexibility and good water resistance and chemical corrosion resistance. A shielding sleeve 106 is wrapped outside the insulating sleeve 105. The shielding layer 106 is woven from metal copper wires, that is, the copper wires are woven into a mesh structure and wrapped outside the insulating sleeve 105. The shielding effect is good and can effectively suppress the influence of external electromagnetic interference on the internal signal of the cable. At the same time, it can also prevent the internal signal of the cable from interfering with the outside world. The higher the braiding density, the better the shielding effect. In addition, a fixed core 107 is set between the three conductors 104. The fixed core 107 is fixed to the outer surface of the insulating sleeve 105. 7 is a hemp rope, which is relatively soft and has little effect on the bending performance of the cable. It can also fill the gaps between the three conductors 104. The multiple drainage holes 108 opened on the filling tube 103 have the function of heat circulation. When the conductor 104 generates too much heat during use, the heat will enter the filling tube 103 through the multiple drainage holes 108. The filling tube 103 is hollow inside, and heat can flow inside it, thereby preventing the conductor 104 from dissipating excessive heat locally. The material used in the filling area 102 is foamed polyethylene, which is light in weight and has good buffering performance. It can ensure the roundness of the cable and reduce the overall weight of the cable. The outer sheath 101 is the outermost protective structure of the cable. It can protect the conductor 104 inside the cable from mechanical damage, chemical corrosion and environmental factors. The material of the outer sheath 101 is also low-smoke and halogen-free. The memory spring 304 is made of a shape memory alloy in a spring shape. At low temperatures, the memory spring 304 contracts and pulls the wind block 302 of the vent. When the heat inside the outer sheath 101 is too high, the memory spring 304 stretches and pushes the wind block 302 to open the heat dissipation slot 303, so that the heat is dissipated from the heat dissipation slot 303. The function of the fixing frame 305 is to complete the installation of the memory spring 304. When in use, the outer sheath 101 is composed of an anti-corrosion layer 1011, a reinforcement layer 1012, a waterproof layer 1013, a thermal insulation layer 1014, and a heat-resistant layer 1015 from the outside to the inside.The anti-corrosion layer 1011 is the outermost layer of the outer sheath 101, which is used to prevent the outer sheath 101 from being chemically corroded during outdoor use of the cable. The cable is used in some harsh environments and will be exposed to corrosive substances, such as components in acid rain. The anti-corrosion layer 1011 is made of chloroprene rubber, which has good chemical corrosion resistance and good tolerance to common acids and alkalis, and can prevent the outer sheath 101 from being corroded. The reinforcement layer 1012 is arranged inside the anti-corrosion layer 1011 to improve the mechanical strength of the cable outer sheath 101, which can prevent the outer sheath 101 from being corroded. 01 is damaged when stretched, squeezed, or impacted. Glass fiber cloth is used. Glass fiber cloth has good tensile and tear resistance, is relatively light, and can protect the interior from mechanical damage. The main function of the waterproof layer 1013 is to prevent external moisture from entering the cable on a large scale. High-density polyethylene is used as the waterproof layer 1013, which has a dense molecular structure and can effectively prevent moisture penetration. The insulation layer 1014 set inside it is mainly used to prevent the cable temperature from being too low in a cold environment and affecting the performance, and can reduce the contact between the cable and the external environment. The heat exchange of the environment keeps the temperature inside the cable within a suitable range. Rock wool is used. Rock wool is an inorganic thermal insulation material with good thermal insulation properties and low thermal conductivity. The heat-resistant layer 1015 used on the outermost layer is made of polyimide, which can withstand high temperatures and can withstand more than 400°C in a short period of time. It can ensure that the cable is within the normal operating temperature range. When in use, in order to ensure that the outer sheath 101 and the internal conductor 104 do not crack in the case of tearing, first put the reinforcing hoop 201 on the outer sheath 101. Externally, by inserting one end of the reinforcing hoop 201 with the limiting strip 206 fixed thereon into the ferrule 202, a plurality of limiting grooves 203 are provided on the inner wall of the ferrule 202, and the limiting grooves 203 and the limiting strips 206 can be engaged together. When one end of the reinforcing hoop 201 is inserted into the ferrule 202, the connection can be strengthened. At this time, by inserting the fastening screw 205 into the threaded hole 204 and rotating and tightening it, the fastening screw 205 is tightly pressed against the reinforcing hoop 201 when tightening it, so that the connection between the reinforcing hoop 201 and the ferrule 202 is tightened.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An environmentally friendly and safe low-smoke halogen-free cable, comprising a cable assembly (1), the cable assembly (1) comprising an outer sheath (101), the outer surface of the outer sheath (101) being fixedly connected to an air outlet assembly (3), characterized in that: A plurality of conductors (104) are arranged inside the outer sheath (101), and each conductor (104) is hollow; a plurality of filling tubes (103) are arranged outside the plurality of conductors (104); the plurality of filling tubes (103) are hollow; and the plurality of filling tubes (103) are used to dissipate heat generated by the conductors (104) inside the cable; a plurality of drainage holes (108) are provided on the inner wall of each filling tube (103) on a side facing between two adjacent conductors (104); the plurality of drainage holes (108) are used to allow the heat generated by the conductors (104) to flow into the filling tube (103); The air outlet component (3) comprises an air outlet (301), and the air outlet (301) is used to emit hot air inside the outer jacket (101) to the outside.

2. The environmentally friendly and safe low-smoke halogen-free cable according to claim 1 is characterized in that: The inner wall of the air outlet (301) is fixedly connected to a fixing frame (305), the outer surface of the fixing frame (305) is fixedly connected to a memory spring (304), and the memory spring (304) is made of memory metal, and one end of the memory spring (304) is fixedly connected to a wind blocking block (302).

3. The environmentally friendly and safe low-smoke halogen-free cable according to claim 2 is characterized in that: The outer surface of the wind blocking block (302) is slidably connected to the inner wall of the air outlet (301), and a plurality of heat dissipation grooves (303) are evenly arranged on the outer surface of the wind blocking block (302) along the circumferential direction, and the plurality of heat dissipation grooves (303) are all used for dissipating heat.

4. The environmentally friendly and safe low-smoke halogen-free cable according to claim 3 is characterized by: The outer surfaces of the plurality of conductors (104) are all wrapped with insulating sleeves (105), the outer surfaces of the plurality of insulating sleeves (105) are all wrapped with shielding sleeves (106), and the shielding sleeve (106) is a mesh structure woven from copper wires, and the outer surface of the shielding sleeve (106) is in contact with the outer surface of the filling tube (103).

5. The environmentally friendly and safe low-smoke halogen-free cable according to claim 4 is characterized in that: A fixed core (107) is arranged between the plurality of shielding sleeves (106) and the fixed core (107) is used to increase the toughness of the cable. A filling area (102) is arranged between the outside of the plurality of shielding sleeves (106) and the plurality of filling tubes (103) and the inside of the outer sheath (101).

6. The environmentally friendly and safe low-smoke halogen-free cable according to claim 5, characterized in that: The outer sheath (101) comprises an anti-corrosion layer (1011), and the anti-corrosion layer (1011) is made of chloroprene rubber; a reinforcing layer (1012) is arranged on the inner wall of the anti-corrosion layer (1011), and the reinforcing layer (1012) is made of glass fiber cloth; a waterproof layer (1013) is arranged on the inner wall of the reinforcing layer (1012), and the material used for the waterproof layer (1013) is high-density polyethylene.

7. The environmentally friendly and safe low-smoke halogen-free cable according to claim 6, characterized in that: The inner wall of the waterproof layer (1013) is provided with a heat-insulating layer (1014), and the material used for the heat-insulating layer (1014) is rock wool; the inner wall of the heat-insulating layer (1014) is provided with a heat-resistant layer (1015), and the heat-resistant layer (1015) is made of a polyimide material for preventing external heat from being transferred to the interior of the cable.

8. The environmentally friendly and safe low-smoke halogen-free cable according to claim 7, characterized in that: A reinforcement component (2) is installed on the outer surface of the outer sheath (101), the reinforcement component (2) comprising a reinforcement hoop (201), and the reinforcement hoop (201) is used to enhance the tear resistance of the cable.

9. The environmentally friendly and safe low-smoke halogen-free cable according to claim 8, characterized in that: One end of the reinforcing hoop (201) is fixedly connected to the clamping sleeve (202), and the other end of the reinforcing hoop (201) is inserted into the interior of the clamping sleeve (202). The other end of the reinforcing hoop (201) is fixedly connected to a plurality of limiting strips (206), and a plurality of limiting grooves (203) are provided on an inner wall of one side of the clamping sleeve (202), and the outer diameter of the limiting strips (206) matches the inner diameter of the limiting grooves (203).

10. The environmentally friendly and safe low-smoke halogen-free cable according to claim 9, characterized in that: A threaded hole (204) is provided on an outer surface of one side of the ferrule (202); the inner wall of the threaded hole (204) is threadedly connected to a fastening screw (205); the fastening screw (205) is used to strengthen the connection between the other end of the reinforcing hoop (201) and the inner wall of the ferrule (202).

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