Low-smoke flame-retardant environment-friendly low-voltage power cable

Abstract

The invention discloses a low-smoke flame-retardant environment-friendly low-voltage power cable, and relates to the technical field of power cables, a plurality of thermal expansion flame-retardant strips are adhered to the inner side of a relay isolation sleeve at equal intervals, inner different buffer strips sleeve the inner sides of the plurality of thermal expansion flame-retardant strips, and corrugated metal outer guide sleeves are clamped to the inner sides of the plurality of inner different buffer strips; according to the cable, the problems that in the prior art, due to the fact that effective flame-retardant and heat-resistant components and oxygen and fire insulation components are not arranged in the cable, and a large amount of air is left in the cable, the cable is not prone to damage, and the cable is not prone to damage due to the fact that the cable is not internally provided with the effective flame-retardant and heat-resistant components and oxygen and fire insulation components are effectively solved. And through internal rapid self-extinguishing, the increase of the internal fire condition caused by flame spreading is reduced, the fire extinguishing speed of the cable is improved, and the situation that the overall body is greatly influenced when part of the cable is damaged due to insufficient fireproof and flame-retardant effects is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, in particular to a low-smoke, flame-retardant, environment-friendly low-voltage power cable. Background Art

[0002] Low-voltage power cable refers to a cable with a relatively low rated voltage level. It is mainly used to distribute and transmit electrical energy, and transmit electricity from distribution transformers or distribution cabinets to final power-consuming equipment or distribution points. Low-voltage power cables usually have conductors, insulation layers, filling layers, inner sheaths, tape layers, outer sheaths, elastomers, etc., and are mainly used in construction, industrial fields, transportation, energy, municipal administration, temporary power supply, etc.

[0003] However, when an arc short circuit occurs inside the cable due to a short circuit or damage to the insulation layer, resulting in a high-temperature fire inside the cable, because there are no effective flame retardant, heat-resistant and oxygen-isolating and fire-isolating components inside the cable, and small gaps are generated between the components when the cable is laid, the air content inside the cable increases, and the oxygen supply increases, thereby aggravating the cable fire situation, greatly affecting the actual fire prevention effect of the cable. At the same time, it will cause greater damage to the whole when it is partially damaged, increasing the cost of subsequent repair and maintenance of the cable, and it is easy to cause environmental fires due to continuous large-scale fires, affecting environmental safety. Summary of the Invention

[0004] The present invention provides a low-smoke, flame-retardant, environment-friendly low-voltage power cable, which can effectively solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a low-smoke flame-retardant environmentally friendly low-voltage power cable, comprising a relay isolation sleeve, wherein a double isolation component is provided at a side end of the relay isolation sleeve; The double partition assembly includes a thermal expansion flame retardant strip; A plurality of heat-expandable flame-retardant strips are bonded to the inner side of the relay isolation sleeve at equal intervals, and an inner buffer strip is sleeved on the inner side of the plurality of heat-expandable flame-retardant strips; The inner sides of the plurality of inner buffer strips are clamped with corrugated metal outer guide sleeves, and the outer ends of the two corrugated metal outer guide sleeves are clamped with gap sealing strips; Several flame-retardant isolation rings are welded at equal intervals on the inner side of the corrugated metal outer guide sleeve, and several bidirectional moisture-absorbing mesh cages are embedded and installed at equal intervals on one end of the inner side of the corrugated metal outer guide sleeve; One end of the corrugated metal outer guide sleeve is clamped with a corrugated inner hollow ring belt, and a plurality of moisture-absorbing heat belts are equidistantly embedded inside the corrugated inner hollow ring belt; A plurality of straight rows of heat conduction holes are equidistantly provided at the side ends of the corrugated inner hollow ring belt corresponding to the positions of the corrugated metal outer guide sleeves, and a plurality of isolation shielding strips are equidistantly wound around the inner side of the corrugated inner hollow ring belt.

[0006] According to the above technical solution, the side end of the inner buffer strip is fitted with the side end of the gap sealing strip, the inner end of the bidirectional moisture absorbing mesh cage is fitted with the outer end of the corrugated inner hollow ring belt, and the outer diameter of the corrugated inner hollow ring belt is equal to the inner diameter of the bidirectional moisture absorbing mesh cage.

[0007] According to the above technical solution, a plurality of flame-retardant covering strips are evenly bonded to the inner side of the isolation shielding strip, a heat-insulating strip is clamped at one end of the inner side of the plurality of flame-retardant covering strips, and a plurality of low-pressure filling cavities are evenly opened on the inner side of the heat-insulating strip; A plurality of the heat-insulating strips are clamped with low-smoke insulating sleeves on the inner sides thereof, and a fixed wire core is installed on the inner side of the low-smoke insulating sleeves; The outer end of the relay isolation sleeve is bonded with an inner hollow buffer belt, and the side ends of the plurality of inner hollow buffer belts are bonded with elastic relay blocks; An outward elastic special-shaped block is clamped between the two relay isolation sleeves, a heat insulation matching pad is bonded to the side end of the outward elastic special-shaped block, and a plurality of outer limit shielding strips are installed on the side ends of the heat insulation matching pads.

[0008] According to the above technical solution, the side ends of the two corrugated hollow ring belts fit together, the inner diameter of the heat-insulating strip is equal to the outer diameter of the low-smoke insulating sleeve, and the side end of the elastic relay block fits together with the side end of the outer elastic special-shaped block.

[0009] According to the above technical solution, the side ends of the two heat-insulating mating pads are fitted together, the longitudinal section of the elastic relay block is Y-shaped, and the longitudinal section of the outward-elastic special-shaped block is T-shaped.

[0010] According to the above technical solution, the side end of the outer limit shielding strip is paved with an outer flame retardant tape, the side end of the outer flame retardant tape is bonded with a heated sintered tape, and the side end of the heated sintered tape is sleeved with a limited insulating sleeve; A plurality of puncture-proof fixing strips are evenly laid at the outer end of the position-limiting insulating sleeve, and the outer end of the puncture-proof fixing strip is sleeved with an outer protective insulating sleeve.

[0011] According to the above technical solution, there are four heated sintered belts and three fixed wire cores, and the longitudinal sections of the thermal expansion flame retardant strip, internal differential buffer strip, isolation shielding strip, flame retardant covering strip, heated isolation strip, thermal insulation matching pad, external limit shielding strip, external flame retardant strip, heated sintered belt and stab-proof fixed strip are arc-shaped.

[0012] According to the above technical solution, a double-guard stabilizing assembly is provided at the side end of the outer insulating sleeve; The double-guard stabilization assembly includes a positioning processing slot; The side end of the outer insulating sleeve is provided with a plurality of positioning processing grooves at equal intervals, and a sealing adhesive pad is embedded in the inner side of the positioning processing groove; The side ends of the two sealing adhesive pads are bonded with threaded processing rings, and the side ends of the two threaded processing rings are connected with a locking isolation sleeve through threads; One end of the locking isolation sleeve is rotatably connected to a porous insulating plate, and a fitting sealing gasket is bonded to the side end of the outer insulating sleeve at a position corresponding to the locking isolation sleeve; The side ends of the plurality of sealing adhesive pads are bonded with stab-proof fixing rings, and the side ends of the blocking isolation sleeve, the fitting sealing pad and the stab-proof fixing ring are bonded with a plurality of stab-proof fixing belts.

[0013] According to the above technical solution, the side ends of the elastic relay block and the external elastic special-shaped block are equidistantly provided with a plurality of embedded fixing grooves, and one end of the elastic relay block and the external elastic special-shaped block is provided with a through processing hole at the position corresponding to the embedded fixing groove, and the inner side of the embedded fixing groove is clamped with an absorption cage; The inner side of the thread processing ring is fitted with the side end of the outer insulating sleeve, and one end of the locking insulating sleeve is fitted with one end of the fitting sealing gasket.

[0014] According to the above technical solution, the side ends of the porous insulation board are fitted with the side ends of the elastic relay block and the outer elastic special-shaped block, the inner ends of the multiple stab-proof fixing belts are bonded and combined with the outer ends of the outer insulating sleeve, and one end of the absorption mesh cage is fitted and connected with the side end of the through-treatment hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. It is equipped with a double-insulation component, which is continuously insulated and flame-isolated by puncture-proof fixing strips, heated sintered belts and external flame-retardant belts. This ensures maximum flame retardancy when the cable is burned continuously and for a long time, and prolongs the time it takes for the cable to catch fire. At the same time, the sintered heated sintered belts and external flame-retardant belts are used for insulation treatment to reduce the speed at which heat is introduced into the cable. This allows the cable to be steadily isolated and protected when an external fire occurs. A ceramic body is formed by sintering the heated insulation strips and filling the low-pressure cavity. The flame is blocked by the flame-retardant covering strips to achieve internal flame isolation and oxygen isolation. The corrugated inner hollow ring belt and the moist heat absorption belt are used for heat absorption and heat dissipation. The corrugated metal outer guide sleeve and the gap sealing strip are used to achieve rapid heat exchange between the inside and the outside, quickly reducing the internal temperature. This allows effective isolation and protection when a fire occurs anywhere inside or outside, thereby improving the stability of the cable operation. By fixing the core to generate heat and conduct heat outward, the heat is used to expand the thermal expansion flame retardant strip, and the thermal expansion flame retardant strip pushes the relay isolation sleeve and the internal special buffer strip to move and extrude in both directions, so as to achieve self-extrusion and filling treatment at various positions inside the cable, making the extrusion between multiple components more compact, reducing the gaps between the components inside the cable, thereby reducing the internal air content. The elastic relay block and the external elastic special-shaped block are used to buffer the internal bending, and the internal hollow buffer strip is heated and expanded to fill the gaps caused by bending, thereby improving the sealing effect, further reducing the internal gaps caused by separation, and improving the overall tightness and sealing of the cable. Through the cable's own thermal expansion and extrusion, internal sintering isolation, oxygen isolation treatment and heat absorption treatment, the problem in the existing technology that the cable fire is aggravated due to the lack of effective flame retardant, heat-resistant components and oxygen and fire isolation components inside the cable and the retention of a large amount of air inside is effectively solved. By quickly extinguishing the fire internally, the spread of flames that aggravates the internal fire is reduced, the speed of cable fire extinguishing is increased, and the greater impact on the overall system caused by partial damage due to insufficient fire retardant effect is reduced, effectively reducing the cost of subsequent cable maintenance, while avoiding large-scale fires and ensuring the safety and stability of the operating environment.

[0016] 2. A double-protection stabilization component is provided, which uses a sealing adhesive pad to bond and fix the puncture-proof fixing ring, and a sealing adhesive pad to fix the threaded processing ring, and uses a thread to connect the locking isolation sleeve and the threaded processing ring, and cooperates with the porous insulation board, the locking isolation sleeve and the fitting sealing pad to isolate and restrict the cable interface position, reduce the contact between the external environment and the cable gap, and cause the inside of the cable to communicate with the outside, affecting the stability of the internal environment of the cable, and use the locking isolation sleeve, the puncture-proof fixing ring and the puncture-proof fixing belt to perform puncture-proof and isolation treatment on the outside of the cable, cooperate with the embedded fixing groove, the through-processing hole and the absorption mesh cage to dry the air inside the cable, reduce the rust of the fixed wire core and internal metal parts caused by environmental humidity, so that the protection position can be adjusted according to the processing environment when the cable is laid, connected and protected, so as to achieve accurate cable positioning protection, enhance the strength of the outside of the cable, reduce the damage to the cable caused by the external environment, and extend its service life.

[0017] In summary, through the cooperation of double-partition components and double-protection stabilization components, through the cooperation of external anti-puncture treatment, middle moisture absorption treatment, external sintering flame retardant and internal multi-layer oxygen insulation flame retardant, internal and external multi-layer protection treatment is achieved, and the overall protection effect of the cable is improved. In addition, through multi-segment isolation treatment, cable segment protection is achieved, reducing the impact between each section of the cable, improving its operational stability, and effectively reducing its maintenance cost when damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0019] In the attached figure: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a structural schematic diagram of the double partition assembly of the present invention; Figure 3 This is a schematic diagram of the installation structure of the inner hollow buffer zone of the present invention; Figure 4Schematic diagram of the installation structure of the gap sealing strip of the present invention; Figure 5 Schematic diagram of the installation structure of the moisture absorption heat belt of the present invention; Figure 6 This is a schematic diagram of the installation structure of the heat-insulating strip of the present invention; Figure 7 It is a schematic structural diagram of the double-guard stabilization assembly of the present invention; Figure 8 It is a schematic diagram of the installation structure of the porous insulation board of the present invention; Numbers in the figure: 1, relay isolation sleeve; 2. Double-partition assembly; 201. Thermal expansion flame retardant strip; 202. Internal irregular buffer strip; 203. Corrugated metal outer guide sleeve; 204. Gap sealing strip; 205. Flame retardant isolation ring; 206. Bidirectional moisture-absorbing mesh cage; 207. Corrugated inner hollow ring belt; 208. Moisture-absorbing heat belt; 209. In-line heat conduction holes; 210. Isolation shielding strip; 211. Flame retardant covering strip; 212. Heat-insulating strip; 213. Filling low-voltage cavity; 214. Low-smoke insulation sleeve; 215. Fixed wire core; 216. Internal hollow buffer belt; 217. Elastic relay block; 218. External elastic special-shaped block; 219. Thermal insulation mat; 220. External limit shielding strip; 221. External flame retardant belt; 222. Heat-sintered belt; 223. Limit insulation sleeve; 224. Anti-puncture fixing strip; 225. Outer insulation sleeve; 3. Double-protection stabilization assembly; 301. Positioning processing groove; 302. Sealing adhesive pad; 303. Threaded processing ring; 304. Positioning isolation sleeve; 305. Porous insulation board; 306. Fitting sealing pad; 307. Anti-puncture fixing ring; 308. Anti-puncture fixing belt; 309. Embedded fixing groove; 310. Through-processing hole; 311. Absorption mesh cage. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0021] Example: Figure 1-8 As shown, the present invention provides a technical solution, a low-smoke flame-retardant environmentally friendly low-voltage power cable, comprising a relay isolation sleeve 1, a double isolation component 2 is provided at the side end of the relay isolation sleeve 1; The double-insulation subassembly 2 includes a thermal expansion flame retardant strip 201, an inner irregular buffer strip 202, a corrugated metal outer guide sleeve 203, a gap sealing strip 204, a flame retardant isolation ring 205, a bidirectional moisture-absorbing mesh cage 206, a corrugated inner hollow ring belt 207, a moisture-absorbing heat belt 208, a straight heat conduction hole 209, an isolation shielding strip 210, a flame retardant covering strip 211, a heat-insulating strip 212, a filling low-voltage cavity 213, a low-smoke insulating sleeve 214, a fixed wire core 215, an inner hollow buffer belt 216, an elastic relay block 217, an outer elastic special-shaped block 218, a thermal insulation mat 219, an outer limit shielding strip 220, an outer flame retardant belt 221, a heated sintered belt 222, a position-limiting insulating sleeve 223, a puncture-proof fixing strip 224, and an outer insulating sleeve 225. Several heat-expandable flame-retardant strips 201 are bonded to the inner side of the relay isolation sleeve 1 at equal distances, and internal buffer strips 202 are sleeved on the inner side of the multiple heat-expandable flame-retardant strips 201; The inner sides of the multiple internal buffer strips 202 are clamped with corrugated metal outer guide sleeves 203, and the outer ends of the two corrugated metal outer guide sleeves 203 are clamped with gap sealing strips 204. The side ends of the internal buffer strips 202 are fitted with the side ends of the gap sealing strips 204 to achieve sealing limit and sealing buffering. Several flame retardant isolation rings 205 are welded at equal intervals on the inner side of the corrugated metal outer guide sleeve 203, and several bidirectional moisture absorbing mesh cages 206 are embedded and installed at equal intervals on one end of the inner side of the corrugated metal outer guide sleeve 203; One end of the corrugated metal outer guide sleeve 203 is clamped with a corrugated inner hollow ring belt 207, the inner end of the bidirectional moisture-absorbing mesh cage 206 is fitted with the outer end of the corrugated inner hollow ring belt 207, the outer diameter of the corrugated inner hollow ring belt 207 is equal to the inner diameter of the bidirectional moisture-absorbing mesh cage 206, and the side ends of the two corrugated inner hollow ring belts 207 are fitted together to ensure stable connection and alignment, thereby achieving isolation protection and moisture-absorbing, sealing and heat-conducting treatment. Several moisture-absorbing heat belts 208 are equidistantly embedded and installed inside the corrugated inner hollow ring belt 207; A plurality of straight rows of heat conducting holes 209 are evenly spaced at the side ends of the corrugated inner hollow ring belt 207 corresponding to the position of the corrugated metal outer guide sleeve 203, and a plurality of isolation shielding strips 210 are evenly spaced and wrapped around the inner side of the corrugated inner hollow ring belt 207; Several flame retardant covering strips 211 are bonded to the inner side of the isolation shielding strip 210 at equal intervals. A heat insulating strip 212 is clamped to one end of the inner side of the flame retardant covering strips 211. Several low-pressure filling cavities 213 are opened at equal intervals on the inner side of the heat insulating strip 212. A low-smoke insulating sleeve 214 is clamped on the inner side of multiple heat-insulating strips 212. The inner diameter of the heat-insulating strips 212 is equal to the outer diameter of the low-smoke insulating sleeve 214, achieving alignment and limited connection. A fixed wire core 215 is installed on the inner side of the low-smoke insulating sleeve 214. There are three fixed wire cores 215 to achieve three-phase conduction. The outer end of the relay isolation sleeve 1 is bonded with an inner hollow buffer belt 216, and the side ends of the inner hollow buffer belts 216 are bonded with elastic relay blocks 217; An external elastic shaped block 218 is clamped between the two relay isolation sleeves 1. The side end of the elastic relay block 217 is fitted with the side end of the external elastic shaped block 218. The longitudinal section of the elastic relay block 217 is Y-shaped, and the longitudinal section of the external elastic shaped block 218 is T-shaped, realizing elastic combination and elastic buffering treatment, ensuring the stability of the overall limit and the overall connection, so that it can be steadily buffered when the cable is bent. The side end of the external elastic shaped block 218 is bonded with a thermal insulation mating pad 219. The side ends of the two thermal insulation mating pads 219 are fitted together to realize thermal insulation and isolation treatment, ensuring integrated limit and external protective insulation treatment. A number of external limit shielding strips 220 are installed on the side ends of multiple thermal insulation mating pads 219; The side ends of the outer limit shielding strips 220 are paved with outer flame retardant tapes 221, and the side ends of the outer flame retardant tapes 221 are bonded with heated sintered tapes 222. There are four heated sintered tapes 222 to achieve positioning protection and ensure the stability of isolation and restriction. The side ends of the heated sintered tapes 222 are sleeved with limited insulating sleeves 223. Several puncture-proof fixing strips 224 are evenly spaced at the outer end of the limiting insulating sleeve 223. The longitudinal cross-sections of the thermal expansion flame-retardant strip 201, the internal difference buffer strip 202, the isolation shielding strip 210, the flame-retardant covering strip 211, the heat-insulating strip 212, the heat-insulating mat 219, the outer limiting shielding strip 220, the outer flame-retardant tape 221, the heated sintering tape 222, and the puncture-proof fixing strip 224 are arc-shaped, achieving fitting and sealing limiting, ensuring the stability of the sealing of multiple components inside the cable. The outer end of the puncture-proof fixing strip 224 is sleeved with an outer insulating sleeve 225. The low-pressure cavity 213 is filled with mica powder and glass powder, the heat-insulating strip 212 is made of silicone rubber, the moisture-absorbing belt 208 is filled with pure water, the bidirectional moisture-absorbing mesh cage 206 is filled with silica gel desiccant, the heat-expanding flame-retardant strip 201 is made of glass fiber rope coated with ammonium polyphosphate, the corrugated metal outer guide sleeve 203, the gap sealing strip 204 and the corrugated inner hollow ring belt 207 are made of aluminum, the heat-sintered belt 222 is made of EVA, aluminum hydroxide and expandable graphite, the outer flame-retardant belt 221 is made of rock wool and aluminum silicate fiber, and the flame-retardant covering strip 211 is made of muscovite sheet and alkali-free glass fiber cloth.

[0022] The side end of the outer insulating sleeve 225 is provided with a double-protection stabilizing assembly 3; The double-protection stabilization assembly 3 includes a positioning processing groove 301, a sealing adhesive pad 302, a threaded processing ring 303, a positioning isolation sleeve 304, a porous insulating plate 305, a fitting sealing pad 306, a puncture-proof fixing ring 307, a puncture-proof fixing belt 308, an embedded fixing groove 309, a through-processing hole 310 and an absorption mesh cage 311; The side end of the outer insulating sleeve 225 is provided with a plurality of positioning grooves 301 at equal intervals, and a sealing adhesive pad 302 is embedded in the inner side of the positioning groove 301; The two sealing adhesive pads 302 are bonded with threaded processing rings 303 on their side ends. The inner sides of the threaded processing rings 303 are fitted with the side ends of the outer insulating sleeve 225 to achieve combined alignment and combined sealing. The side ends of the two threaded processing rings 303 are connected to the locking isolation sleeves 304 through threads. One end of the blocking isolation sleeve 304 is rotatably connected to the porous insulating plate 305. The side ends of the porous insulating plate 305 are fitted with the elastic relay block 217 and the side ends of the outer elastic special-shaped block 218 to achieve side end insulation protection. The side end of the outer insulating sleeve 225 is bonded with a fitting sealing gasket 306 at the position corresponding to the blocking isolation sleeve 304. One end of the blocking isolation sleeve 304 is fitted with one end of the fitting sealing gasket 306 to ensure edge fitting and sealing and the stability of the combined limit. The side ends of the multiple sealing adhesive pads 302 are bonded with stab-proof fixing rings 307, and the side ends of the blocking isolation sleeve 304, the fitting sealing pad 306 and the stab-proof fixing ring 307 are bonded with a plurality of stab-proof fixing strips 308. The inner ends of the multiple stab-proof fixing strips 308 are bonded to the outer ends of the outer insulating sleeve 225 to ensure the stability of the stab-proof protection. Several embedded fixing grooves 309 are equidistantly provided at the side ends of the elastic relay block 217 and the external elastic shaped block 218. A through-processing hole 310 is provided at one end of the elastic relay block 217 and the external elastic shaped block 218 corresponding to the position of the embedded fixing groove 309. An absorption mesh cage 311 is clamped on the inner side of the embedded fixing groove 309. One end of the absorption mesh cage 311 is fitted and connected to the side end of the through-processing hole 310 to realize the serial moisture absorption treatment.

[0023] The working principle and usage process of the present invention are as follows: when the cable is laid and needs to be bent or the side end needs to be puncture-proof, the staff uses an external tool to open a positioning processing groove 301 on the side end of the outer insulating sleeve 225 of the cable, embeds the sealing adhesive pad 302 into the inner side of the positioning processing groove 301, and fixes the puncture-proof fixing ring 307 to the side end of the outer insulating sleeve 225 using the sealing adhesive pad 302 to achieve fixed positioning of the puncture-proof fixing ring 307, adheres the puncture-proof fixing belt 308 to the side end of the puncture-proof fixing ring 307 and the side end of the outer insulating sleeve 225 to achieve puncture-proof protection treatment of the outer insulating sleeve 225, and adheres the threaded processing ring 303 to the side end of the sealing adhesive pad 302 , connect the blocking isolation sleeve 304 and the threaded processing ring 303 to each other through threads, insert the fixed wire core 215 into the inner side of the porous insulating plate 305, and rotate the porous insulating plate 305 and the blocking isolation sleeve 304 during connection to achieve steady blocking of the fixed wire core 215, adhere the fitting sealing gasket 306 to the side end of the outer insulating sleeve 225, and use the fitting sealing gasket 306 side end to fit the side end of the blocking isolation sleeve 304, then adhere the puncture-proof fixing belt 308 to the side end of the blocking isolation sleeve 304 and the fitting sealing gasket 306, so that the cable can be quickly limited and isolated during connection and protection, thereby improving the stability of the cable limit protection; When the cable is in use, the fixed core 215 is used for conduction, and the fixed core 215 generates heat during conduction. The heat is gradually conducted outward along the low-smoke insulation sleeve 214, and the heat is transferred outward along the inside, and the heat is transferred to the position of the thermal expansion flame retardant strip 201. At this time, the thermal expansion flame retardant strip 201 absorbs heat and expands. The thermal expansion flame retardant strip 201 is squeezed in both directions inward and outward, pushing the relay isolation sleeve 1 outward and the inner buffer strip 202 inward, and gradually squeezing the cable to achieve self-extrusion and filling treatment, making the squeezing between multiple components tighter. When the fixed core 215 inside the cable is short-circuited and damaged, the fixed core 215 position generates 25 The high temperature of 0°C is quickly transferred to the position of the low-smoke insulating sleeve 214. At this time, the low-smoke insulating sleeve 214 is melted by heat, and the insulation position is damaged. When an arc appears at the position of the fixed core 215, the low-smoke insulating sleeve 214 is ignited. At this time, high temperature is continuously generated inside. The flame directly burns the heated insulating strip 212. The flame sinters the heated insulating strip 212 and the mica powder and glass powder filled in the low-pressure cavity 213 at 300°C. The silicone rubber of the heated insulating strip 212, the mica powder and the glass powder are used to form a ceramic hard shell, which is squeezed and sealed at the edge to reduce internal air leakage, thereby isolating oxygen and achieving internal self-extinguishing treatment. During the sintering process, the heat is conducted outward along the heated insulating strip 212, and is flame-retardantly insulated through the flame-retardant covering strip 211. The layered structure of the mica glass fiber in the flame-retardant covering strip 211 is used to block the flame, and absorb heat and dehydrate to isolate the flame, reduce the flame spillage, and improve the steady processing of the internal self-insulation and fire extinguishing. In addition, the isolation shielding strip 210 is used for steady insulation. The heat is transferred to the position of the hollow annular belt 207 inside the corrugation along the isolation shielding strip 210. The high temperature heats the moist absorption belt 208, and the moist absorption belt 208 absorbs heat to generate hot steam, which is directly sprayed along the straight heat conduction hole 209. At the side end of the corrugated metal outer guide sleeve 203, the edge of the corrugated metal outer guide sleeve 203 is isolated by the gap sealing strip 204. Heat is transferred outward along the corrugated metal outer guide sleeve 203 and the gap sealing strip 204. At this time, the flame-retardant isolation ring 205 is used for segmented isolation, so that when high temperature occurs inside, internal water cooling can be used for heat absorption treatment. After the heat is discharged, condensed water is generated, and the condensed water flows to the position of the two-way moisture-absorbing mesh cage 206. The condensed water is absorbed by the internal silica gel desiccant, achieving internal isolation protection and continuous operation protection effects, and improving the rapid response to internal fire and high temperature generated by internal operation; The outer portion of the cable is protected from puncture and insulated by the position-limiting insulating sleeve 223, the anti-puncture fixing strip 224 and the outer insulating sleeve 225, thereby improving stability in daily use. When a fire occurs on the outer portion of the cable, the flame gradually burns and melts the position-limiting insulating sleeve 223, the anti-puncture fixing strip 224 and the outer insulating sleeve 225, and then the flame directly sinters the heated sintered belt 222 to form a ceramic hard shell. The ceramic hard shell is then used to perform flame retardant treatment on the inner portion, and the mineral wool core of the outer flame retardant belt 221 is used for heat and fire insulation. This improves the cable's ability to effectively perform isolation and protection operations when a fire occurs on the outer portion of the cable. When the cable is bent, the elastic relay block 217 and the external elastic shaped block 218 are used to buffer the internal bending, and the internal hollow buffer belt 216 is heated and expanded to fill the gaps caused by the bending, thereby improving the sealing effect. In addition, during continuous use, the silica gel desiccant in the built-in fixing groove 309 and the absorption cage 311 in the penetrating processing hole 310 is used to dry the moist air in the cable gaps, thereby improving its dryness, reducing the rust damage to the fixed wire core 215 due to the humid environment, and improving the stability of operation.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A low-smoke flame-retardant environmentally friendly low-voltage power cable, comprising a relay isolation sleeve (1), characterized in that: The side end of the relay isolation sleeve (1) is provided with a double isolation component (2); The double partition assembly (2) includes a thermal expansion flame retardant strip (201); A plurality of heat-expandable flame-retardant strips (201) are bonded to the inner side of the relay isolation sleeve (1) at equal intervals, and an inner buffer strip (202) is sleeved on the inner side of the plurality of heat-expandable flame-retardant strips (201); The inner sides of the plurality of inner buffer strips (202) are clamped with corrugated metal outer guide sleeves (203), and the outer ends of two of the corrugated metal outer guide sleeves (203) are clamped with gap sealing strips (204); Several flame-retardant isolation rings (205) are welded at equal intervals on the inner side of the corrugated metal outer guide sleeve (203), and several bidirectional moisture-absorbing mesh cages (206) are embedded and installed at equal intervals on one end of the inner side of the corrugated metal outer guide sleeve (203); One end of the corrugated metal outer guide sleeve (203) is clamped with a corrugated inner hollow annular belt (207), and a plurality of moisture absorption belts (208) are equidistantly embedded and installed inside the corrugated inner hollow annular belt (207); A plurality of straight-row heat-conducting holes (209) are equidistantly provided at the side end of the corrugated inner hollow annular belt (207) corresponding to the position of the corrugated metal outer guide sleeve (203), and a plurality of isolation shielding strips (210) are equidistantly wound around the inner side of the corrugated inner hollow annular belt (207).

2. The low-smoke flame-retardant environmentally friendly low-voltage power cable according to claim 1, characterized in that: The side end of the inner difference buffer strip (202) is fitted with the side end of the gap sealing strip (204), the inner end of the bidirectional moisture absorbing mesh cage (206) is fitted with the outer end of the corrugated inner hollow annular belt (207), and the outer diameter of the corrugated inner hollow annular belt (207) is equal to the inner diameter of the bidirectional moisture absorbing mesh cage (206).

3. The low-smoke, flame-retardant, environmentally friendly low-voltage power cable according to claim 1, characterized in that: A plurality of flame-retardant covering strips (211) are bonded to the inner side of the isolation shielding strip (210) at equal intervals, a heat-insulating strip (212) is clamped to one end of the inner side of the plurality of flame-retardant covering strips (211), and a plurality of low-pressure filling cavities (213) are opened at equal intervals on the inner side of the heat-insulating strip (212); A low-smoke insulation sleeve (214) is clamped on the inner side of the plurality of heat-insulating strips (212), and a fixed wire core (215) is installed on the inner side of the low-smoke insulation sleeve (214); An inner hollow buffer belt (216) is bonded to the outer end of the relay isolation sleeve (1), and a plurality of elastic relay blocks (217) are bonded to the side ends of the inner hollow buffer belts (216); An external elastic shaped block (218) is clamped between the two relay isolation sleeves (1), a heat insulation matching pad (219) is bonded to the side end of the external elastic shaped block (218), and a plurality of external limit shielding strips (220) are installed on the side ends of the plurality of heat insulation matching pads (219).

4. The low-smoke, flame-retardant, environmentally friendly low-voltage power cable according to claim 3, characterized in that: The side ends of the two corrugated hollow ring belts (207) are fitted together, the inner diameter of the heat-insulating strip (212) is equal to the outer diameter of the low-smoke insulating sleeve (214), and the side end of the elastic relay block (217) is fitted together with the side end of the outer elastic special-shaped block (218).

5. The low-smoke, flame-retardant, environmentally friendly low-voltage power cable according to claim 3, characterized in that: The side ends of the two heat-insulating mating pads (219) are fitted together, the longitudinal section of the elastic relay block (217) is Y-shaped, and the longitudinal section of the outward-elastic special-shaped block (218) is T-shaped.

6. The low-smoke, flame-retardant, environmentally friendly low-voltage power cable according to claim 3, characterized in that: The side end of the outer limit shielding strip (220) is paved with an outer flame retardant tape (221), the side end of the outer flame retardant tape (221) is bonded with a heated sintered tape (222), and the side end of the heated sintered tape (222) is sleeved with a limiting insulating sleeve (223); A plurality of puncture-proof fixing strips (224) are laid at equal intervals on the outer end of the position-limiting insulating sleeve (223), and an outer protective insulating sleeve (225) is sleeved on the outer end of the puncture-proof fixing strip (224).

7. The low-smoke, flame-retardant, environmentally friendly low-voltage power cable according to claim 6, characterized in that: There are four heated sintered strips (222), three fixed wire cores (215), and the longitudinal sections of the thermal expansion flame retardant strip (201), the internal differential buffer strip (202), the isolation shielding strip (210), the flame retardant covering strip (211), the heated isolation strip (212), the thermal insulation mating pad (219), the external limit shielding strip (220), the external flame retardant strip (221), the heated sintered strip (222), and the stab-proof fixing strip (224) are arc-shaped.

8. The low-smoke, flame-retardant, environmentally friendly low-voltage power cable according to claim 6, characterized in that: A double-guard stabilizing assembly (3) is provided at the side end of the outer insulating sleeve (225); The double-guard stabilization assembly (3) comprises a positioning processing groove (301); A plurality of positioning processing grooves (301) are equidistantly formed on the side end of the outer insulating sleeve (225), and a sealing adhesive pad (302) is embedded and installed inside the positioning processing groove (301); The side ends of the two sealing adhesive pads (302) are bonded with threaded processing rings (303), and the side ends of the two threaded processing rings (303) are connected with locking isolation sleeves (304) through threads; One end of the locking isolation sleeve (304) is rotatably connected to a porous insulation plate (305), and a fitting sealing gasket (306) is bonded to the side end of the outer insulating sleeve (225) at a position corresponding to the locking isolation sleeve (304); The side ends of the plurality of sealing adhesive pads (302) are bonded with puncture-proof fixing rings (307), and the side ends of the blocking isolation sleeve (304), the fitting sealing pad (306) and the puncture-proof fixing ring (307) are bonded with a plurality of puncture-proof fixing belts (308).

9. The low-smoke, flame-retardant, environmentally friendly low-voltage power cable according to claim 8, characterized in that: The side ends of the elastic relay block (217) and the external elastic shaped block (218) are equidistantly provided with a plurality of internal fixing grooves (309); one end of the elastic relay block (217) and the external elastic shaped block (218) is provided with a through-hole (310) at a position corresponding to the internal fixing groove (309); an absorption mesh cage (311) is clamped inside the internal fixing groove (309); The inner side of the thread processing ring (303) is fitted with the side end of the outer insulating sleeve (225), and one end of the locking insulating sleeve (304) is fitted with one end of the fitting sealing gasket (306).

10. The low-smoke, flame-retardant, environmentally friendly low-voltage power cable according to claim 9, characterized in that: The side ends of the porous insulating plate (305) are fitted with the side ends of the elastic relay block (217) and the outer elastic special-shaped block (218), the inner ends of the plurality of stab-proof fixing belts (308) are bonded and assembled with the outer end of the outer insulating sleeve (225), and one end of the absorption mesh cage (311) is fitted and connected with the side end of the through-hole (310).

Images