A shock-resistant and highly flame-retardant cable

Abstract

The present invention discloses an impact-resistant and highly flame-retardant cable, which relates to the technical field of cables. The cable comprises an outer sheath and an inner cable. The outer sheath is composed of an outer flame-retardant layer and an outer wear-resistant layer. The inner part of the outer sheath is connected in an inlaid manner to a plurality of groups of micro temperature sensors, and the distance between each group of temperature sensors is set in equal parts according to the length of the cable. Under the cooperation of the regulating component and the elastic potential energy, as the micro elastic spring is previously compressed, the cone needle moves forward under the guidance of the guide edge ring, pierces the flame retardant microcapsule, and then releases the flame retardant from the flame retardant microcapsule, and emits from the connecting cavity and the plurality of core hole ends, promptly covering the outside and inside of the cable, quickly reducing the temperature around the cable and suppressing the spread of flame, thereby improving the fire resistance and impact resistance of the cable as a whole, and enhancing its adaptability and durability in harsh environments, and effectively performing flame-retardant multi-layer protection operations on the entire cable after a fire source is generated.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, in particular to an impact-resistant and highly flame-retardant cable. Background Art

[0002] With the development of my country's petrochemical, communications, transportation, construction, and electric power industries, the demand for cables in power plants, substations, smelting, and petrochemical industries has increased significantly in recent years. This has led to higher demands for cable performance and quantity. Consequently, the materials used to make cables have become increasingly high-end, specialized, and specialized. Cables are not only required to have excellent physical properties, such as tensile strength and elongation at break, but also to possess flame retardancy and impact resistance.

[0003] In the prior art, such as Chinese application number: 202120205214.8, "Impact-resistant and highly flame-retardant cable", a sheath and multiple bundles of cable cores located in the sheath, multiple bundles of the cable cores are jointly sheathed with an armor layer located in the sheath, the inner wall of the armor layer is fixedly connected to multiple groups of triangular frames for supporting the inner wall, the outer peripheral wall of the armor layer is provided with a reinforcement for enhancing rigidity, a flexible buffer layer is provided between the armor layer and the sheath, and a high-density filling layer is installed in the internal cavity of the armor layer. The device improves the rigidity of the armor layer through annular reinforcement ribs, and The triangular frame evenly supports the inner wall of the armor layer and improves the strength of the armor layer, making the armor layer less likely to deform and reducing the risk of the cable core being squeezed, thereby achieving the effect of improving the impact resistance, which is beneficial to extending the service life of the cable. The triangular frame is divided into multiple areas by the dividing rod, which is convenient for the classified placement of cable cores with different functions and can reduce the friction between the cable cores. The grooves and the clamping seat can clamp the cable core, which is beneficial to reduce the shaking of the cable core. The polypropylene filling strip layer and the elastic rubber layer can relieve the impact pressure on the cable and reduce the impact pressure on the cable core.

[0004] However, in the existing technology, although some flame-retardant materials are used as the overall protection of the cable during its use, when a fire source occurs in the cable, it is impossible to actively perform flame-retardant protection, resulting in the overall cable performance and service life cannot be effectively guaranteed. Therefore, it is necessary to propose an impact-resistant and highly flame-retardant cable. Summary of the Invention

[0005] The purpose of the present invention is to provide an impact-resistant and highly flame-retardant cable to solve the problem proposed in the above background technology that during the use of the cable, although some flame-retardant materials are used as the overall protection of the cable, when a fire source occurs in the cable, flame-retardant protection cannot be actively performed, resulting in the overall cable performance and service life cannot be effectively guaranteed.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: an impact-resistant and highly flame-retardant cable, comprising an outer sheath and an inner cable, wherein the outer sheath is composed of an outer flame-retardant layer and an outer wear-resistant layer, wherein the inner portion of the outer sheath is interlocked and connected to multiple groups of miniature temperature sensors, wherein the distance between each group of temperature sensors is equally spaced according to the cable length, and wherein a plurality of hollow waists are equally spaced and installed on the surface of the outer sheath, wherein the plurality of hollow waists are symmetrically arranged, and wherein the inner sides of two groups of symmetrical hollow waists are both fastened to control components;

[0007] The regulating component includes an edge piece mounting seat, the bottom end of the edge piece mounting seat is fastened to the inner surface of the hollow waist, the side end of the edge piece mounting seat is fastened with a micro elastic spring, the side end of the edge piece mounting seat is fastened with an edge connecting ring, the side end of the edge connecting ring is installed with a guide edge ring, the interior of the guide edge ring is slidably connected with a cone needle, the side end of the edge connecting ring is fastened with a high thermal conductivity connecting rod, the bottom end side of the edge connecting ring is integrally formed with a thermal conductive seat, the interior of the thermal conductive seat is installed with a multi-layer thermal expansion coefficient plate, the side wall surface of the thermal conductive seat is provided with a receiving groove, the top end of the multi-layer thermal expansion coefficient plate is integrally formed with a limiting part, the multi-layer thermal expansion coefficient plate and the limiting part have the same structure, and the limiting part is located in the elastic gap of the micro elastic spring.

[0008] Preferably, two groups of symmetrical impact-proof plates are installed inside the hollow waists, and the bottom ends of the impact-proof plates and the internal groove surfaces of the hollow waists form a buffer placement space, and flame retardant microcapsules are installed inside the buffer placement space.

[0009] Preferably, a plurality of core hole ends are equally spaced around the side wall surfaces of the two symmetrical hollow wasp waists, and the front end of the cone needle and the side wall point surface of the flame retardant microcapsule are located on the same axis.

[0010] Preferably, a connecting cavity is opened inside the outer sheath, and the connecting cavity is composed of a spiral cavity and a DC cavity intersecting and connecting each other. An impact-resistant shape memory alloy wire is installed inside the spiral cavity, and a heat-conducting metal rod is installed inside the DC cavity.

[0011] Preferably, the side end of the heat-conducting metal rod is fastened with a heat-conducting trigger connector, and the heat-conducting trigger connector is fastened to the high-thermal-conductivity connecting rod.

[0012] Preferably, the inner cable consists of a wire core, an inner flame retardant layer, an inner shielding layer and an inner buffer layer. The wire core is located inside the inner buffer layer, and a core-fixing jacket is installed on the outside of the inner flame retardant layer.

[0013] Preferably, the inner shielding layer is located outside the inner buffer layer, the inner shielding layer is located inside the inner flame retardant layer, and the inner flame retardant layer is located inside the outer sheath.

[0014] Preferably, the interior of the inner flame retardant layer and the outer flame retardant layer are filled with graphene nanofillers and plant fibers, the inner shielding layer is composed of a composite of metal foil and braided shielding, and the ratio of the fillers inside the inner flame retardant layer and the outer flame retardant layer is 7:3.

[0015] Preferably, the inner buffer layer is composed of three buffer layers, which are respectively supported by aramid fiber, glass fiber and mixed fiber. The outer wear-resistant layer is composed of a high-performance polymer and is filled with carbon material particles.

[0016] Preferably, several of the hollow waists are installed together with fireproof partition walls provided in the cable laying path to prevent the spread of flames and high-temperature smoke.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, with the cooperation of the regulating component, under the real-time monitoring of the micro temperature sensor, when the cable temperature exceeds the set safety threshold, the micro temperature sensor sends an alarm signal, and the high temperature is transferred to the heat-conducting trigger connector through the heat-conducting metal rod. The heat-conducting trigger connector transfers heat to the heat-conducting seat in the regulating component through the high-heat-conducting connecting rod, so that the multi-layer thermal expansion coefficient plate in the heat-conducting seat expands due to the heat, and at the same time, the limiting parts of the same structure expand synchronously due to the heat. The expansion difference between the layers will cause the internal stress to increase. When the stress exceeds the strength limit of the material, the interface or weak point of the multi-layer thermal expansion coefficient plate and the limiting part will break, and then the limiting part will release the restriction on the micro elastic spring, so that the micro elastic spring, from the stored force state, with the cooperation of elastic potential energy, as the micro elastic spring is previously compressed, causes the cone needle to move forward under the guidance of the guide edge ring, thereby piercing the flame retardant. Microcapsules, thereby releasing the flame retardant from the flame retardant microcapsules, and dissipating from the connecting cavity and multiple groups of core hole ends, timely covering the outside and inside of the cable, quickly reducing the temperature around the cable and suppressing the spread of flames, and when the cable is subjected to external impact, the structural design of the impact-proof plate and the hollow bee waist can absorb and disperse the impact energy, reduce damage to the core part of the cable, and the buffer placement space provided by the impact-proof plate further absorbs the impact force, protecting the internal flame retardant microcapsules from being damaged by external pressure, resulting in the inability to perform flame retardant operations in time when a fire source is generated subsequently. At the same time, the spiral cavity is installed with impact-resistant shape memory alloy wire, so that it can return to its original shape after being impacted, providing continuous impact protection, which improves the fire and impact resistance of the cable as a whole, and enhances its adaptability and durability in harsh environments, and effectively performs flame retardant multi-layer protection operations on the entire cable after a fire source is generated.

[0019] 2. In the present invention, the outer wear-resistant layer is made to provide primary protection in advance by cooperating with the outer flame retardant layer, the outer wear-resistant layer, the inner buffer layer, the inner shielding layer and the inner flame retardant layer, and the outer wear-resistant layer is composed of a high-performance polymer and filled with carbon particles inside, so that while increasing the wear resistance and protection, the carbon particles filled inside are used to improve its conductivity, which helps to prevent static electricity accumulation. After that, the use of the inner cable is from the inside to the outside, and the inner cable consists of a wire core, an inner buffer layer, an inner shielding layer and an inner flame retardant layer, wherein the inner flame retardant layer is placed on the outside of the inner shielding layer and on the inside of the outer flame retardant layer to form double flame retardant protection, and the inner flame retardant layer and the outer flame retardant layer are filled with graphene nanofillers and plant fibers, wherein the ratio of the internal fillers of the inner flame retardant layer and the outer flame retardant layer is 7:3, which is convenient for utilizing the characteristics of the graphene nanofillers and plant fibers, greatly improving the overall Flame retardancy, and the proportion of the internal filler of the inner flame retardant layer is greater than that of the outer flame retardant layer, so as to take into account the internal core under high load conditions, generate high temperature, trigger a fire source from the inside, and cause a fire hazard, so that the inner flame retardant layer can effectively suppress the development of the flame at the early stage of the fire, and can play a role faster, preventing or slowing down the speed of the flame spreading to the outside, and by properly adjusting the internal filler of the outer flame retardant layer, it helps to balance the overall production cost and weight. The setting of the plant fiber helps to improve the mechanical strength and flexibility of the entire cable, and ensure the reliability and service life of the cable under various installation conditions. Secondly, the setting of the inner shielding layer and the inner buffer layer effectively reduces the influence of the external electromagnetic field on the internal core, while also preventing the internal signal from interfering with the external environment, and providing additional physical protection for the core inside the cable to prevent damage caused by external forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main structure of an impact-resistant and highly flame-retardant cable of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal cross-sectional structure of a main body of an impact-resistant and highly flame-retardant cable of the present invention;

[0022] Figure 3 This is a front view structural diagram of a main body of an impact-resistant and highly flame-retardant cable according to the present invention;

[0023] Figure 4 This is a schematic diagram of the overall structure of an impact-resistant and highly flame-retardant cable of the present invention;

[0024] Figure 5 This is a schematic diagram of the installation position structure of the impact-resistant shape memory alloy wire and the heat-conducting metal rod in an impact-resistant and highly flame-retardant cable of the present invention;

[0025] Figure 6 This is a schematic structural diagram of a regulating component in an impact-resistant and highly flame-retardant cable of the present invention;

[0026] Figure 7 The present invention is a kind of impact-resistant high flame retardant cable Figure 5 A schematic diagram of the enlarged structure.

[0027] In the figure: 1. Outer sheath; 2. Inner flame retardant layer; 3. Inner shielding layer; 4. Wire core; 5. Hollow waist; 6. Core hole end; 7. Core fixing jacket; 8. Impact-proof plate; 9. Flame retardant microcapsule; 10. Control component; 101. Mounting edge plate; 102. Micro elastic spring; 103. Edge connecting ring; 104. Cone needle; 105. Guide edge ring; 106. Thermal conductive seat; 107. Multi-layer thermal expansion coefficient plate; 108. Receiving groove; 109. Limiting part; 11. Inner buffer layer; 12. Impact-resistant shape memory alloy wire; 13. Thermal conductive metal rod; 14. Thermal trigger connector; 15. High thermal conductivity connecting rod; 16. Connecting cavity. DETAILED DESCRIPTION

[0028] 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 implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] In the present invention, reference is made to Figure 1 - Figure 7 The figure shows an impact-resistant and highly flame-retardant cable, comprising an outer sheath 1 and an inner cable. The outer sheath 1 is composed of an outer flame-retardant layer and an outer wear-resistant layer. Multiple groups of miniature temperature sensors are embedded and connected inside the outer sheath 1. The distance between each group of temperature sensors is set equally according to the length of the cable. A plurality of hollow waists 5 are evenly installed on the surface of the outer sheath 1. The plurality of hollow waists 5 form a symmetrical arrangement. The inner sides of two groups of symmetrical hollow waists 5 are fastened to the inner sides of the regulating components 10.

[0030] The regulating component 10 includes an installation edge piece seat 101, the bottom end of the installation edge piece seat 101 is fastened to the inner surface of the hollow wasp waist 5, the side end of the installation edge piece seat 101 is fastened with a micro elastic spring 102, the side end of the installation edge piece seat 101 is fastened with an edge connecting ring 103, the side end of the edge connecting ring 103 is installed with a guide edge ring 105, the inside of the guide edge ring 105 is slidably connected with a cone needle 104, the side end of the edge connecting ring 103 is fastened with a high thermal conductivity connecting rod 15, the bottom side of the edge connecting ring 103 is integrally formed with a thermal conductive seat 106, the inside of the thermal conductive seat 106 is installed with a multi-layer thermal expansion coefficient plate 107, the side wall surface of the thermal conductive seat 106 is provided with a receiving groove 108, the top of the multi-layer thermal expansion coefficient plate 107 is integrally formed with a limiting member 109, the multi-layer thermal expansion coefficient plate 107 and the limiting member 109 have the same structure, and the limiting member 109 is located in the elastic gap of the micro elastic spring 102.

[0031] The two groups of symmetrical hollow waists 5 are internally installed with anti-impact plates 8. The bottom interior of the anti-impact plates 8 and the internal groove surface of the hollow waist 5 form a buffer placement space. Flame retardant microcapsules 9 are installed inside the buffer placement space.

[0032] Multiple groups of core hole ends 6 are evenly spaced around the side wall surfaces of the two groups of symmetrical hollow waists 5. The front ends of the cone needles 104 and the side wall points of the flame retardant microcapsules 9 are located on the same axis.

[0033] A connecting cavity 16 is provided inside the outer sheath 1. The connecting cavity 16 is composed of a spiral cavity and a DC cavity intersecting and connecting each other. An impact-resistant shape memory alloy wire 12 is installed inside the spiral cavity, and a heat-conducting metal rod 13 is installed inside the DC cavity.

[0034] The side end of the heat-conducting metal rod 13 is fastened with a heat-conducting trigger connector 14 , and the heat-conducting trigger connector 14 is fastened to the high-heat-conducting connecting rod 15 .

[0035] In a specific solution, when the cable temperature exceeds the set safety threshold, the micro temperature sensor sends an alarm signal, and the high temperature is transferred to the thermal trigger connector 14 through the heat-conducting metal rod 13. The thermal trigger connector 14 transfers the heat to the thermal seat 106 in the control component 10 through the high thermal conductivity connecting rod 15, causing the multi-layer thermal expansion coefficient plate 107 in the thermal seat 106 to expand due to the heat. At the same time, the limiting member 109 of the same structure expands synchronously due to the heat. The expansion difference between the layers will cause the internal stress to increase. When the stress exceeds the strength limit of the material, the interface or weak point of the multi-layer thermal expansion coefficient plate 107 and the limiting member 109 will break, and then the limiting member 109 will release the restriction on the micro elastic spring 102, so that the micro elastic spring 102, from the stored state, with the cooperation of elastic potential energy, as the micro elastic spring 102 is previously compressed, causes the cone needle 104 to move forward under the guidance of the guide edge ring 105. Puncture the flame retardant microcapsule 9, thereby releasing the flame retardant from the flame retardant microcapsule 9, and dissipating from the connecting cavity 16 and the multiple groups of core hole ends 6, timely covering the outside and inside of the cable, quickly reducing the temperature around the cable and suppressing the spread of flames. When the cable is subjected to external impact, the structural design of the impact-proof plate 8 and the hollow bee waist 5 can absorb and disperse the impact energy, reduce damage to the core part of the cable, and the buffer placement space provided by the impact-proof plate 8 further absorbs the impact force, protecting the internal flame retardant microcapsule 9 from being damaged due to external pressure, resulting in the inability to perform flame retardant operations in time when a fire source is generated subsequently. At the same time, the spiral cavity is installed with an impact-resistant shape memory alloy wire 12, so that it can return to its original shape after being impacted, providing continuous impact protection, and improving the fire and impact resistance of the cable as a whole. It also enhances its adaptability and durability in harsh environments, and effectively performs flame retardant multi-layer protection operations on the entire cable after a fire source is generated.

[0036] In the present invention, according to Figure 1 - Figure 4 As shown, the inner cable consists of a core 4, an inner flame retardant layer 2, an inner shielding layer 3 and an inner buffer layer 11. The core 4 is located inside the inner buffer layer 11, and a core-fixing jacket 7 is installed on the outside of the inner flame retardant layer 2.

[0037] The inner shielding layer 3 is located outside the inner buffer layer 11 , the inner shielding layer 3 is located inside the inner flame retardant layer 2 , and the inner flame retardant layer 2 is located inside the outer sheath 1 .

[0038] The interior of the inner flame retardant layer 2 and the outer flame retardant layer are filled with graphene nanofillers and plant fibers, the inner shielding layer 3 is composed of a composite of metal foil and braided shielding, and the filling ratio of the inner flame retardant layer 2 and the outer flame retardant layer is 7:3.

[0039] The inner buffer layer 11 is composed of three buffer layers, which are respectively supported by aramid fiber, glass fiber and mixed fiber. The outer wear-resistant layer is composed of high-performance polymer and is filled with carbon material particles.

[0040] Several hollow waists 5 are installed together with fireproof partition walls provided in the cable laying path to prevent the spread of flames and high-temperature smoke.

[0041] In a specific solution, the inner shielding layer 3 effectively reduces electromagnetic interference (EMI) and radio frequency interference (RFI) through a metal foil and braided shielding composite structure. The inner buffer layer 11 is composed of aramid fiber, glass fiber and mixed fiber, providing mechanical buffering and protection to prevent external shock and vibration from affecting the core 4. The graphene nanofillers and plant fibers filled in the inner and outer flame retardant layers can suppress the spread of flames in the event of a fire. The outer sheath 1 is any one of PVC, PE and PUR. During use, the whole Under the cooperation of the outer sheath 1, the outer wear-resistant layer is pre-made to provide the primary protection work, and the outer wear-resistant layer is composed of high-performance polymers and filled with carbon material particles inside, so that while increasing the wear resistance and protection, the carbon material particles filled inside are used to improve its conductivity, which helps to prevent static electricity accumulation. After that, the use of the inner cable is sequentially from the inside to the outside. The inner cable consists of a core 4, an inner buffer layer 11, an inner shielding layer 3 and an inner flame retardant layer 2, wherein the inner flame retardant layer 2 is placed outside the inner shielding layer 3 and inside the outer flame retardant layer to form a double flame retardant protection, and in the inner resistance Both the flame retardant layer 2 and the outer flame retardant layer are filled with graphene nanofillers and plant fibers, wherein the ratio of the internal fillers of the inner flame retardant layer 2 and the outer flame retardant layer is 7:3, which makes it easy to utilize the characteristics of graphene nanofillers and plant fibers to greatly improve the overall flame retardancy, and makes the internal filler ratio of the inner flame retardant layer 2 greater than that of the outer flame retardant layer, so as to consider that the internal core 4 generates high temperature under high load, triggers a fire source from the inside, and causes a fire hazard, so that the inner flame retardant layer 2 can effectively suppress the development of the flame at the early stage of the fire, can play a role faster, and prevent or slow down the speed of the flame spreading to the outside. By properly adjusting the internal filler of the outer flame retardant layer, it helps to balance the overall production cost and weight. The setting of the plant fiber helps to improve the mechanical strength and flexibility of the entire cable, ensuring the reliability and service life of the cable under various installation conditions. Secondly, the setting of the inner shielding layer 3 and the inner buffer layer 11 effectively reduces the influence of the external electromagnetic field on the internal core 4, while also preventing the internal signal from interfering with the external environment, and providing additional physical protection for the core 4 inside the cable to prevent damage caused by external forces.

[0042] The wiring diagram of the micro temperature sensor in the present invention is common knowledge in the field, and its working principle is a well-known technology. The model is selected according to actual use, so the control method and wiring arrangement of the micro temperature sensor are no longer explained in detail.

[0043] The method of use and working principle of this device: First, the inner shielding layer 3 is made of a metal foil and braided shielding composite structure to effectively reduce electromagnetic interference (EMI) and radio frequency interference (RFI). The inner buffer layer 11 is composed of aramid fiber, glass fiber and mixed fiber to provide mechanical buffering and protection to prevent external shock and vibration from affecting the wire core 4. The inner flame retardant layer 2 and the outer flame retardant layer are filled with graphene nanofillers and plant fibers, and the outer sheath 1 is any one of PVC, PE, and PUR. During the use of the whole, with the cooperation of the outer sheath 1, the outer wear-resistant layer is pre-made to provide primary protection. The outer wear-resistant layer is composed of high-performance polymers and is filled with carbon particles inside, so that while increasing the wear resistance and protection, the carbon filled inside is utilized. Material particles, improve its conductive properties, help prevent static electricity accumulation, and then the use of the inner cable, from the inside to the outside, the inner cable consists of a core 4, an inner buffer layer 11, an inner shielding layer 3 and an inner flame retardant layer 2, wherein the inner flame retardant layer 2 is placed on the outside of the inner shielding layer 3 and the inside of the outer flame retardant layer to form a double flame retardant protection, and the inner flame retardant layer 2 and the outer flame retardant layer are filled with graphene nanofillers and plant fibers, wherein the ratio of the internal fillers of the inner flame retardant layer 2 and the outer flame retardant layer is 3:7, which is convenient for utilizing the characteristics of graphene nanofillers and plant fibers to greatly improve the overall flame retardancy, and the internal filler ratio of the inner flame retardant layer 2 is greater than that of the outer flame retardant layer, so as to consider the internal core 4 under high load conditions. When a high temperature is generated, a fire source is triggered from the inside, which causes a fire hazard, The inner flame retardant layer 2 can effectively suppress the development of flames in the early stage of fire, can play a role faster, and prevent or slow down the speed of flames spreading to the outside. By properly adjusting the internal filling of the outer flame retardant layer, it helps to balance the overall production cost and weight. The setting of the plant fiber helps to improve the mechanical strength and flexibility of the entire cable, and ensure the reliability and service life of the cable under various installation conditions. Secondly, the setting of the inner shielding layer 3 and the inner buffer layer 11 effectively reduces the impact of the external electromagnetic field on the internal core 4, and also prevents the internal signal from interfering with the external environment. At the same time, it provides additional physical protection for the core 4 inside the cable to prevent damage caused by external forces. The overall flame spread can be effectively suppressed in the event of a fire, and then in the micro temperature sensor Under the real-time monitoring of the sensor, when the cable temperature exceeds the set safety threshold, the micro temperature sensor sends an alarm signal, and the generated high temperature is transferred to the heat-conducting trigger connector 14 through the heat-conducting metal rod 13. The heat-conducting trigger connector 14 transfers the heat to the heat-conducting seat 106 in the regulating component 10 through the high-thermal-conducting connecting rod 15, causing the multi-layer thermal expansion coefficient plate 107 in the heat-conducting seat 106 to expand due to the heat. At the same time, the limiting member 109 of the same structure expands due to the heat simultaneously. The expansion difference between the layers will cause the internal stress to increase. When the stress exceeds the strength limit of the material, the interface or weak point of the multi-layer thermal expansion coefficient plate 107 and the limiting member 109 will break, thereby causing the limiting member 109 to release the restriction on the micro elastic spring 102.The micro elastic spring 102 is in a charged state. With the cooperation of elastic potential energy, as the micro elastic spring 102 is previously compressed, the cone needle 104 moves forward under the guidance of the guide edge ring 105, piercing the flame retardant microcapsule 9, thereby releasing the flame retardant from the flame retardant microcapsule 9 and distributing it from the connecting cavity 16 and the multiple core hole ends 6, covering the outside and inside of the cable in time, quickly reducing the temperature around the cable and suppressing the spread of flames. When the cable is subjected to external impact, the structural design of the impact-proof plate 8 and the hollow waist 5 can absorb and disperse the impact energy. The amount of shock absorption is reduced, which reduces the damage to the core part of the cable. The buffer placement space provided by the impact-proof plate 8 further absorbs the impact force, protecting the internal flame retardant microcapsules 9 from being damaged by external pressure, resulting in the inability to perform flame retardant operations in time when a fire source is generated later. At the same time, the spiral cavity is installed with an impact-resistant shape memory alloy wire 12, which enables it to return to its original shape after being impacted, providing continuous impact protection, improving the fire and impact resistance of the cable as a whole, and enhancing its adaptability and durability in harsh environments. It effectively performs flame retardant multi-layer protection operations on the whole after a fire source is generated. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An impact-resistant and highly flame-retardant cable, characterized by: The invention comprises an outer sheath (1) and an inner cable, wherein the outer sheath (1) is composed of an outer flame retardant layer and an outer wear-resistant layer, a plurality of groups of miniature temperature sensors are connected in a chimeric manner inside the outer sheath (1), and the distance between each group of temperature sensors is set in equal parts according to the length of the cable, and a plurality of hollow waists (5) are installed in equal parts on the surface of the outer sheath (1), and the plurality of hollow waists (5) are symmetrically arranged, and the inner sides of two groups of symmetrical hollow waists (5) are both fastened with a regulating assembly (10); The regulating assembly (10) comprises a mounting edge piece seat (101), the bottom end of the mounting edge piece seat (101) is fastened to the inner surface of the hollow waist (5), the side end of the mounting edge piece seat (101) is fastened to a micro elastic spring (102), the side end of the mounting edge piece seat (101) is fastened to an edge connecting ring (103), the side end of the edge connecting ring (103) is installed with a guide edge ring (105), the inside of the guide edge ring (105) is slidably connected to a cone needle (104), the side end of the edge connecting ring (103) is fastened to a high A heat-conducting connecting rod (15), a heat-conducting seat (106) is integrally formed on the side of the bottom end of the edge connecting ring (103), a multi-layer thermal expansion coefficient plate (107) is installed inside the heat-conducting seat (106), a receiving groove (108) is opened on the side wall surface of the heat-conducting seat (106), and a limiting member (109) is integrally formed on the top end of the multi-layer thermal expansion coefficient plate (107), the multi-layer thermal expansion coefficient plate (107) and the limiting member (109) have the same structure, and the limiting member (109) is located in the elastic gap of the micro elastic spring (102); Two groups of symmetrical hollow waists (5) are internally installed with impact-proof plates (8), the bottom interiors of the impact-proof plates (8) and the internal groove surfaces of the hollow waists (5) form a buffer placement space, and flame retardant microcapsules (9) are installed inside the buffer placement space; Multiple groups of core hole ends (6) are equally spaced around the side wall surfaces of the two groups of symmetrical hollow waists (5), and the front end of the cone needle (104) and the side wall point surface of the flame retardant microcapsule (9) are located on the same axis.

2. The impact-resistant and highly flame-retardant cable according to claim 1, characterized in that: A connecting cavity (16) is provided inside the outer sheath (1), and the connecting cavity (16) is composed of a spiral cavity and a DC cavity that intersect and connect with each other. An impact-resistant shape memory alloy wire (12) is installed inside the spiral cavity, and a heat-conducting metal rod (13) is installed inside the DC cavity.

3. The impact-resistant and highly flame-retardant cable according to claim 2, characterized in that: The side end of the heat-conducting metal rod (13) is fastened with a heat-conducting trigger connecting piece (14), and the heat-conducting trigger connecting piece (14) is fastened to the high-heat-conducting connecting rod (15).

4. The impact-resistant and highly flame-retardant cable according to claim 3, characterized in that: The inner cable is composed of a wire core (4), an inner flame retardant layer (2), an inner shielding layer (3) and an inner buffer layer (11); the wire core (4) is located inside the inner buffer layer (11); and a core-fixing jacket (7) is installed on the outside of the inner flame retardant layer (2).

5. The impact-resistant and highly flame-retardant cable according to claim 4, characterized in that: The inner shielding layer (3) is located outside the inner buffer layer (11), the inner shielding layer (3) is located inside the inner flame retardant layer (2), and the inner flame retardant layer (2) is located inside the outer sheath (1).

6. The impact-resistant and highly flame-retardant cable according to claim 5, characterized in that: The interiors of the inner flame retardant layer (2) and the outer flame retardant layer are both filled with graphene nanofillers and plant fibers, and the inner shielding layer (3) is composed of a composite of metal foil and braided shielding.

7. The impact-resistant and highly flame-retardant cable according to claim 6, characterized in that: The inner buffer layer (11) is composed of three buffer layers, each of which is supported by aramid fiber, glass fiber, and mixed fiber. The outer wear-resistant layer is composed of a high-performance polymer and is filled with carbon material particles.

8. The impact-resistant and highly flame-retardant cable according to claim 7, characterized in that: A plurality of the hollow wasp waists (5) are installed with fireproof partition walls provided in the cable laying path to prevent the spread of flames and high-temperature smoke.

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