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

Abstract

The application 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 symmetrically attached to the inner side of a relay isolation sleeve. A plurality of inner different buffer strips are sleeved on the inner side of the thermal expansion flame-retardant strips. A plurality of corrugated metal outer guide sleeves are clamped on the inner side of the plurality of inner different buffer strips. A gap sealing strip is clamped on the outer side of the two corrugated metal outer guide sleeves. A plurality of flame-retardant isolation rings are symmetrically welded on the inner side of the corrugated metal outer guide sleeves. The application effectively solves the problem that, in the prior art, the cable is not provided with effective flame-retardant, heat-resistant components and oxygen and fire isolation components, a large amount of air is stored in the cable, the cable fire condition is aggravated, the internal fire condition is aggravated due to the flame spread, the cable fire extinguishing speed is improved, and the overall cable is greatly affected due to the insufficient fireproof and flame-retardant effect.

Description

Technical Field

[0001] This invention relates to the field of power cable technology, specifically to a low-smoke, flame-retardant, environmentally friendly low-voltage power cable. Background Technology

[0002] Low-voltage power cables refer to cables with relatively low rated voltage levels. They are mainly used for distributing and transmitting electrical energy, delivering power from distribution transformers or distribution cabinets to end-user equipment or distribution points. Low-voltage power cables typically consist of conductors, insulation layers, filler layers, inner sheaths, wrapping layers, outer sheaths, elastomers, etc. They are mainly used in the construction, industrial, transportation, energy, municipal, and temporary power supply fields.

[0003] However, when an arc short circuit occurs inside the cable due to a short circuit or damage to the insulation layer, leading to high-temperature fire, the lack of effective flame-retardant, heat-insulating, and oxygen-barrier components, coupled with small gaps between components during cable laying, increases the air content and oxygen supply inside the cable, thus exacerbating the fire and significantly impacting its actual fireproofing effect. Furthermore, partial damage can cause substantial overall damage, increasing subsequent maintenance costs and increasing the risk of widespread, continuous fires that could ignite the environment and compromise environmental safety. Summary of the Invention

[0004] This invention provides an environmentally friendly low-voltage power cable with low smoke and flame retardancy, which can effectively solve the problems mentioned in the background art.

[0005] To achieve the above objectives, 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 assembly is provided on the side end of the relay isolation sleeve;

[0006] The dual-partition assembly includes a thermally expanding flame-retardant strip;

[0007] The relay isolation sleeve has several thermal expansion flame retardant strips bonded at equal intervals on its inner side, and an inner buffer strip is sleeved on the inner side of each of the thermal expansion flame retardant strips.

[0008] Corrugated metal outer guide sleeves are snapped into the inner sides of multiple inner buffer strips, and gap sealing strips are snapped into the outer ends of two corrugated metal outer guide sleeves.

[0009] The inner side of the corrugated metal outer guide sleeve is welded with several flame-retardant isolation rings at equal intervals, and one end of the inner side of the corrugated metal outer guide sleeve is embedded with several bidirectional moisture-absorbing mesh cages at equal intervals.

[0010] One end of the corrugated metal outer guide sleeve is snapped with a corrugated inner hollow ring belt, and several moisture-absorbing heat sinks are equidistantly embedded in the inner side of the corrugated inner hollow ring belt.

[0011] The straight row of heat conduction holes are equidistantly arranged at the positions of the wave-shaped metal outer sleeve corresponding to the side ends of the wave-shaped inner empty ring belt.

[0012] According to the above technical scheme, the side end of the inner different buffer strip is attached to the side end of the gap sealing strip, the inner side end of the two-way moisture absorption mesh cage is attached to the outer side end of the wave-shaped inner empty ring belt, and the outer diameter of the wave-shaped inner empty ring belt is equal to the inner diameter of the two-way moisture absorption mesh cage.

[0013] According to the above technical scheme, the inner side of the isolation shielding strip is equidistantly bonded with a plurality of flame-retardant covering strips, one end of the inner side of the plurality of flame-retardant covering strips is clamped with a heat insulation strip, and a plurality of filling low-pressure cavities are equidistantly arranged in the inner side of the heat insulation strip.

[0014] A low-smoke insulation sleeve is clamped in the inner side of the plurality of heat insulation strips, and a fixed wire core is mounted in the inner side of the low-smoke insulation sleeve.

[0015] The outer side end of the relay isolation sleeve is bonded with an inner empty buffer belt, and a plurality of elastic relay blocks are bonded at the side ends of the inner empty buffer belt.

[0016] An outer elastic special-shaped block is clamped between the two relay isolation sleeves, the outer side end of the outer elastic special-shaped block is bonded with a heat insulation matching pad, and a plurality of outer limiting shielding strips are mounted at the side ends of the heat insulation matching pad.

[0017] According to the above technical scheme, the side ends of the two wave-shaped inner empty ring belts are attached to each other, the inner diameter of the heat insulation strip is equal to the outer diameter of the low-smoke insulation sleeve, and the side end of the elastic relay block is attached to the side end of the outer elastic special-shaped block.

[0018] According to the above technical scheme, the side ends of the two heat insulation matching pads are attached to each other, the longitudinal section of the elastic relay block is Y-shaped, and the longitudinal section of the outer elastic special-shaped block is T-shaped.

[0019] According to the above technical scheme, the outer side end of the outer limiting shielding strip is laid with an outer isolation flame-retardant belt, the outer side end of the outer isolation flame-retardant belt is bonded with a heat sintering belt, and the outer side end of the heat sintering belt is sleeved with a limiting insulation sleeve.

[0020] A plurality of anti-puncture fixing strips are equidistantly laid at the outer side end of the limiting insulation sleeve, and an outer protective insulation sleeve is sleeved at the outer side end of the anti-puncture fixing strip.

[0021] According to the above technical scheme, the heat sintering belt has four, the fixed wire core has three, and the longitudinal sections of the heat expansion flame-retardant strip, the inner different buffer strip, the isolation shielding strip, the flame-retardant covering strip, the heat insulation strip, the heat insulation matching pad, the outer limiting shielding strip, the outer isolation flame-retardant belt, the heat sintering belt and the anti-puncture fixing strip are arc-shaped.

[0022] According to the above technical scheme, the outer side end of the outer protective insulation sleeve is provided with a double-protection stabilizing assembly.

[0023] The double protection and stability assembly comprises a clamping position processing groove;

[0024] A plurality of clamping position processing grooves are equidistantly arranged on the side end of the outer protective insulation sleeve, and sealing and bonding pads are embedded and installed in the clamping position processing grooves;

[0025] Threaded processing rings are bonded on the side ends of two sealing and bonding pads, and clamping isolation sleeves are connected to the side ends of the threaded processing rings through threads;

[0026] A perforated insulation plate is rotationally connected to one end of the clamping isolation sleeve, and a close-contact sealing pad is bonded at a position corresponding to the clamping isolation sleeve on the side end of the outer protective insulation sleeve;

[0027] Anti-piercing fixing rings are bonded on the side ends of a plurality of sealing and bonding pads, and a plurality of anti-piercing fixing belts are bonded on the side ends of the clamping isolation sleeve, the close-contact sealing pad and the anti-piercing fixing rings.

[0028] According to the above technical solution, a plurality of embedded fixing grooves are equidistantly arranged on the side ends of the elastic relay block and the outer elastic special-shaped block, through holes are arranged on one end of the elastic relay block and the outer elastic special-shaped block at positions corresponding to the embedded fixing grooves, and an absorption net cage is clamped in the embedded fixing grooves.

[0029] The inner side of the threaded processing ring is in close contact with the side end of the outer protective insulation sleeve, and one end of the clamping isolation sleeve is in close contact with one end of the close-contact sealing pad.

[0030] According to the above technical solution, the side end of the perforated insulation plate is in close contact with the side ends of the elastic relay block and the outer elastic special-shaped block, the inner side ends of a plurality of anti-piercing fixing belts are bonded and combined with the outer side end of the outer protective insulation sleeve, and one end of the absorption net cage is connected to the side end of the through hole in a sleeved manner.

[0031] Compared with the prior art, the present application has the following advantages:

[0032] 1. The double isolation and separation assembly is provided, continuous heat insulation and flame isolation are performed through the anti-piercing fixing strip, the heat sintering strip and the outer isolation and flame retardant strip, so that the maximum flame retardation can be ensured when continuous and long-time burning occurs, the time of cable fire is prolonged, heat introduction into the cable is reduced through heat insulation treatment of the heat sintering strip and the outer isolation and flame retardant strip after sintering, stable isolation and protection of the cable inside can be realized when the outside is on fire, the heat isolation strip and the low-pressure cavity filling sintered ceramic body are used in cooperation with the flame retardant covering strip to isolate the flame and oxygen, heat absorption and heat dissipation are performed through the corrugated inner space ring belt and the moisture heat absorption belt, and the internal and external rapid heat exchange is realized through the corrugated metal outer guide sleeve and the gap sealing strip, so that the internal temperature is rapidly reduced, the cable operation stability is improved, and the cable inside can be effectively isolated and protected when the inside or the outside is on fire.

[0033] Through the fixed wire core heating and heat conduction outward, the heat is used for heat expansion of the fire-retardant strip, the fire-retardant strip pushes the relay isolation sleeve and the inner buffer strip to move bidirectionally and extrude, the positions in the cable are self-extruded and filled, the extrusion between the multiple components is more compact, the gaps between the components in the cable are reduced, the air content in the cable is reduced, the elasticity relay block and the outer elastic special-shaped block are used for bending buffering of the inside, the gaps generated by bending are filled by the heat expansion of the inner empty buffer belt, the sealing effect is improved, the internal gaps caused by separation are further reduced, and the compactness and the sealing degree of the cable are improved.

[0034] Through the self-expansion and extrusion of the cable, the internal sintering isolation, the oxygen isolation treatment and the heat absorption treatment, the situation that the cable is on fire is effectively solved, the internal air is stored, the fire-retardant and heat-resistant components and the oxygen isolation component are not arranged, the flame spread is reduced, the internal fire is reduced, the fire-extinguishing speed of the cable is improved, the influence on the whole caused by the insufficient fireproofing and fire-retardant effect is reduced, the cost of subsequent maintenance of the cable is effectively reduced, the large-scale fire is avoided, and the safety and stability of the operation environment are ensured.

[0035] 2. The double protection stabilizing assembly is provided with a sealing adhesive pad, the anti-puncture fixing ring is fixed by the sealing adhesive pad, the thread treatment ring is fixed by the sealing adhesive pad, the thread treatment ring is connected with the clamping isolation sleeve through thread, the cable interface position is isolated and limited by the porous insulation plate, the clamping isolation sleeve and the adhering sealing pad, the contact between the external environment and the cable gap is reduced, the internal environment of the cable is affected, the cable outside is prevented and isolated by the clamping isolation sleeve, the anti-puncture fixing ring and the anti-puncture fixing belt, the internal air of the cable is dried by the embedded fixing groove, the penetrating treatment hole and the absorption net cage, the rust of the fixed wire core and the internal metal component caused by the environmental humidity is reduced, the protection position can be adjusted according to the treatment environment when the cable is laid and connected and laid, the cable is accurately positioned and protected, the strength of the cable outside is enhanced, the damage of the external environment to the cable is reduced, and the service life of the cable is prolonged.

[0036] In summary, the double isolation component and the double protection stabilizing component are matched, the external anti-puncture treatment, the middle moisture absorption treatment, the external sintering fire-retardant treatment and the internal multi-layer oxygen isolation fire-retardant treatment are matched, the internal and external multi-layer protection treatment is realized, the protection effect of the cable is improved, the cable is segmented and protected through the multi-segment isolation treatment, the influence between the segments of the cable is reduced, the stability of the cable is improved, and the maintenance cost of the cable is effectively reduced when the cable is damaged. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are meant to explain the present application but are not intended to limit the application.

[0038] In the drawings:

[0039] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0040] Figure 2 is a schematic diagram of the structure of the double partition assembly of the present application;

[0041] Figure 3 is a schematic diagram of the installation structure of the inner empty buffer belt of the present application;

[0042] Figure 4 is a schematic diagram of the installation structure of the gap sealing strip of the present application;

[0043] Figure 5 is a schematic diagram of the installation structure of the moisture absorption heat absorption belt of the present application;

[0044] Figure 6 is a schematic diagram of the installation structure of the heat insulation strip of the present application;

[0045] Figure 7 is a schematic diagram of the structure of the double protection and stabilization assembly of the present application;

[0046] Figure 8 is a schematic diagram of the installation structure of the porous insulation board of the present application;

[0047] Reference signs in the drawings: 1, relay isolation sleeve;

[0048] 2, double partition assembly; 201, thermal expansion fireproof strip; 202, inner different buffer strip; 203, corrugated metal outer guide sleeve; 204, gap sealing strip; 205, fireproof isolation ring; 206, bidirectional moisture absorption net cage; 207, corrugated inner empty ring belt; 208, moisture absorption heat absorption belt; 209, straight row heat conduction hole; 210, isolation shielding strip; 211, fireproof covering strip; 212, heat insulation strip; 213, filling low-pressure cavity; 214, low-smoke insulation sleeve; 215, fixed core; 216, inner empty buffer belt; 217, elastic relay block; 218, outer elastic special-shaped block; 219, heat insulation matching pad; 220, outer limit shielding strip; 221, outer partition fireproof belt; 222, heat sintering belt; 223, limiting insulation sleeve; 224, anti-puncture fixed strip; 225, outer protection insulation sleeve;

[0049] 3. Double-protection stabilizing components; 301. Positioning groove; 302. Sealing adhesive gasket; 303. Threaded ring; 304. Positioning isolation sleeve; 305. Porous insulating board; 306. Fitting sealing gasket; 307. Anti-puncture fixing ring; 308. Anti-puncture fixing strip; 309. Embedded fixing groove; 310. Through-hole; 311. Absorption net cage. Detailed Implementation

[0050] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0051] Example: Figures 1-8 As shown, the present invention provides a technical solution, a low-smoke flame-retardant environmentally friendly low-voltage power cable, including a relay isolation sleeve 1, and a double isolation distribution component 2 is provided on the side end of the relay isolation sleeve 1;

[0052] The double-isolation distribution assembly 2 includes a thermally expanding flame-retardant strip 201, an inner 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 tape 208, a straight-out heat-conducting hole 209, an isolation shielding strip 210, a flame-retardant covering strip 211, a heat-resistant isolation strip 212, a low-pressure cavity filling 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 irregular block 218, a heat-insulating mating pad 219, an outer limiting shielding strip 220, an outer flame-retardant isolation belt 221, a heat-resistant sintered belt 222, a limiting insulating sleeve 223, an anti-puncture fixing strip 224, and an outer protective insulating sleeve 225.

[0053] The inner side of the relay isolation sleeve 1 is equidistantly bonded with several thermal expansion flame retardant strips 201, and the inner side of the multiple thermal expansion flame retardant strips 201 is sleeved with an inner buffer strip 202.

[0054] Multiple inner buffer strips 202 are snapped with corrugated metal outer guide sleeves 203 on their inner sides, and two corrugated metal outer guide sleeves 203 are snapped with gap sealing strips 204 on their outer ends. The side ends of the inner buffer strips 202 and the side ends of the gap sealing strips 204 are in contact to achieve sealing limit and sealing buffer treatment.

[0055] 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 at equal intervals on one end of the inner side of the corrugated metal outer guide sleeve 203.

[0056] The corrugated metal outer sleeve 203 is clamped at one end with a corrugated inner hollow ring belt 207, the inner side of the two-way moisture absorption mesh cage 206 is attached to the outer side 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 two-way moisture absorption mesh cage 206, the two corrugated inner hollow ring belts 207 are attached to each other, which ensures stable connection and alignment, realizes isolation protection and moisture absorption sealing heat treatment, and a plurality of moisture absorption heat absorption belts 208 are embedded and installed at equal intervals on the inner side of the corrugated inner hollow ring belt 207;

[0057] A plurality of straight heat conduction holes 209 are arranged at equal intervals on the corrugated inner hollow ring belt 207 corresponding to the position of the corrugated metal outer sleeve 203, and a plurality of isolation shielding strips 210 are wound at equal intervals on the inner side of the corrugated inner hollow ring belt 207;

[0058] A plurality of flame-retardant covering strips 211 are attached at equal intervals on the inner side of the isolation shielding strip 210, a heat insulation strip 212 is clamped at one end on the inner side of the plurality of flame-retardant covering strips 211, and a plurality of low-pressure cavity filling 213 are arranged at equal intervals on the inner side of the heat insulation strip 212;

[0059] A plurality of low-smoke insulation sleeves 214 are clamped on the inner side of the heat insulation strip 212, the inner diameter of the heat insulation strip 212 is equal to the outer diameter of the low-smoke insulation sleeve 214, which realizes alignment and limiting connection, and a fixed wire core 215 is installed on the inner side of the low-smoke insulation sleeve 214, which has three, realizing three-phase conduction;

[0060] The inner hollow buffer belt 216 is attached to the outer side of the relay isolation sleeve 1, and the elastic relay block 217 is attached to the side end of the plurality of inner hollow buffer belts 216;

[0061] The outer elastic special-shaped block 218 is clamped between the two relay isolation sleeves 1, the side end of the elastic relay block 217 is attached to the side end of the outer elastic special-shaped block 218, the longitudinal section of the elastic relay block 217 is Y-shaped, and the longitudinal section of the outer elastic special-shaped block 218 is T-shaped, realizing elastic combination and elastic buffering treatment, ensuring the stability of overall limiting and overall connection, so that stable buffering treatment can be realized when the cable is bent, and the heat insulation matching pad 219 is attached to the side end of the outer elastic special-shaped block 218, the side end of the two heat insulation matching pads 219 is attached, realizing heat insulation treatment, ensuring integrated limiting and outer protection heat insulation treatment, and a plurality of outer limiting shielding strips 220 are installed on the side end of the plurality of heat insulation matching pads 219;

[0062] The outer isolation flame-retardant belt 221 is laid on the side end of the outer limiting shielding strip 220, the heat sintering belt 222 is attached to the side end of the outer isolation flame-retardant belt 221, and the heat sintering belt 222 has four, realizing clamping protection and ensuring the stability of isolation limitation, and the limiting insulation sleeve 223 is sleeved on the side end of the heat sintering belt 222;

[0063] A plurality of anti-puncture fixing strips 224 are equidistantly laid outside the end of the limiting insulation sleeve 223. The longitudinal section of the thermal expansion flame-retardant strip 201, the inner different buffer strip 202, the isolation shielding strip 210, the flame-retardant covering strip 211, the heat insulation strip 212, the heat insulation matching pad 219, the outer limiting shielding strip 220, the outer insulation flame-retardant strip 221, the heat insulation sintering strip 222 and the anti-puncture fixing strip 224 is arc-shaped, realizing close limiting and sealed limiting, ensuring the stability of the sealing of the internal components of the cable, and the outer end of the anti-puncture fixing strip 224 is sleeved with an outer protective insulation sleeve 225.

[0064] The low-pressure cavity 213 is filled with mica powder and glass powder. The material of the heat insulation strip 212 is silicone rubber. The moisture absorption heat absorption strip 208 is filled with pure water. The bidirectional moisture absorption net cage 206 is filled with silica gel desiccant. The material of the thermal expansion flame-retardant strip 201 is a glass fiber rope coated with ammonium polyphosphate. The material of the corrugated metal outer guide sleeve 203, the gap sealing strip 204 and the corrugated inner empty ring strip 207 is aluminum. The material of the heat insulation sintering strip 222 is EVA, aluminum hydroxide and expandable graphite. The material of the outer insulation flame-retardant strip 221 is rock wool and aluminum silicate fiber. The material of the flame-retardant covering strip 211 is white mica sheet and alkali-free glass fiber cloth.

[0065] The outer protective insulation sleeve 225 is provided with a double protection stabilizing assembly 3 at the side end.

[0066] The double protection stabilizing assembly 3 includes a clamping position processing groove 301, a sealing adhesive pad 302, a threaded treatment ring 303, a clamping position insulation sleeve 304, a porous insulation plate 305, a close sealing pad 306, an anti-puncture fixing ring 307, an anti-puncture fixing strip 308, an embedded fixing groove 309, a penetrating treatment hole 310 and an absorption net cage 311.

[0067] A plurality of clamping position processing grooves 301 are equidistantly formed in the side end of the outer protective insulation sleeve 225. The sealing adhesive pad 302 is embedded and installed in the inside of the clamping position processing groove 301.

[0068] Two sealing adhesive pads 302 are adhered with threaded treatment rings 303 at the side end. The threaded treatment rings 303 are in close contact with the side end of the outer protective insulation sleeve 225, realizing combined alignment and combined sealing treatment. The two threaded treatment rings 303 are connected with the clamping position insulation sleeve 304 through threads.

[0069] The clamping position insulation sleeve 304 is rotatably connected with the porous insulation plate 305 at one end. The side end of the porous insulation plate 305 is in close contact with the side end of the elastic relay block 217 and the outer elastic special-shaped block 218, realizing side end insulation protection treatment. The close sealing pad 306 is adhered to the position of the clamping position insulation sleeve 304 at the side end of the outer protective insulation sleeve 225. The one end of the clamping position insulation sleeve 304 is in close contact with the one end of the close sealing pad 306, ensuring the stability of edge close sealing and combined limiting.

[0070] The plurality of sealing adhesive pads 302 are provided with a stab-proof fixing ring 307 at the side end, the card position isolation sleeve 304, the sealing pad 306 and the stab-proof fixing ring 307 are provided with a plurality of stab-proof fixing belts 308 at the side end, the plurality of stab-proof fixing belts 308 are combined with the outer side of the outer protective insulation sleeve 225, so as to ensure the stability of the stab-proof protection.

[0071] The elastic relay block 217 and the outer elastic special-shaped block 218 are provided with a plurality of embedded fixing grooves 309 at the side end, the elastic relay block 217 and the outer elastic special-shaped block 218 are provided with a through processing hole 310 at the position corresponding to the embedded fixing groove 309, and the embedded fixing groove 309 is provided with an absorption net cage 311, and the absorption net cage 311 is connected with the side end of the through processing hole 310, so as to realize the absorption and moisture treatment.

[0072] The working principle and use process of the present application are as follows: when the cable is laid and needs to be bent or the side end needs to be stab-proof, the staff uses external tools to open the card processing groove 301 at the side end of the outer protective insulation sleeve 225 of the cable, embeds the sealing adhesive pad 302 into the inner side of the card processing groove 301, fixes the stab-proof fixing ring 307 to the side end of the outer protective insulation sleeve 225 by using the sealing adhesive pad 302, realizes the fixing and carding of the stab-proof fixing ring 307, adheres the stab-proof fixing belt 308 to the side end of the stab-proof fixing ring 307 and the side end of the outer protective insulation sleeve 225, realizes the stab-proof protection of the outer protective insulation sleeve 225, adheres the threaded processing ring 303 to the side end of the sealing adhesive pad 302, connects the card position isolation sleeve 304 and the threaded processing ring 303 through threads, inserts the fixed core 215 into the inner side of the multi-hole insulation plate 305, and rotates the multi-hole insulation plate 305 and the card position isolation sleeve 304 when connected, realizes the stable carding treatment of the fixed core 215, adheres the sealing pad 306 to the side end of the outer protective insulation sleeve 225, and uses the side end of the sealing pad 306 to adhere to the side end of the card position isolation sleeve 304, at this time, the stab-proof fixing belt 308 is adhered to the side end of the card position isolation sleeve 304 and the sealing pad 306, so that the cable laying and laying protection can be quickly limited and isolated, and the stability of the cable limiting protection is improved.

[0073] In the use of the cable, the fixed core 215 conducts electricity, and the fixed core 215 generates heat during conduction. The heat is gradually conducted outward along the low-smoke insulation sleeve 214. The heat is transferred outward. The heat is transferred to the position of the thermal expansion fire-retardant strip 201. At this time, the thermal expansion fire-retardant strip 201 absorbs heat and expands. The thermal expansion fire-retardant strip 201 is squeezed inward and outward. The relay isolation sleeve 1 is pushed outward, and the internal buffer strip 202 is pushed inward. Gradually, the cable is squeezed and filled. The multiple components are squeezed more tightly. When the fixed core 215 inside the cable is short-circuited and damaged, a high temperature of 250°C is generated at the position of the fixed core 215 in a short time. The high temperature is quickly transferred to the position of the low-smoke insulation sleeve 214. At this time, the low-smoke insulation sleeve 214 is melted. At this time, the insulation position is damaged. When an electric arc occurs at the position of the fixed core 215, the low-smoke insulation sleeve 214 is ignited. At this time, a high temperature is continuously generated inside. The flame directly burns the heat-insulating strip 212. The flame burns the mica powder and glass powder in the low-pressure cavity 213. The mica powder and glass powder are sintered at 300°C. The silicon rubber of the heat-insulating strip 212, the mica powder, and the glass powder form a ceramic hard shell. The edge is squeezed and sealed. The internal air is connected. Oxygen is isolated. The internal fire is extinguished automatically.

[0074] During the sintering process, the heat is conducted outward along the heat-insulating strip 212, and the fire-retardant covering strip 211 is used for fire-retardant and heat-insulating. The layered structure of the mica glass silk in the fire-retardant covering strip 211 is used for flame isolation and heat absorption and dehydration treatment. The flame is isolated. The flame is reduced. The internal self-heat-insulating and fire-extinguishing process is stable. The isolation shielding strip 210 is used for stable heat insulation. The heat is transferred to the position of the corrugated inner air ring 207 along the isolation shielding strip 210. The high temperature heats the moisture absorption heat strip 208. The moisture absorption heat strip 208 absorbs heat and generates steam. The steam is directly sprayed to the side end of the corrugated metal outer sleeve 203 along the straight heat-conducting hole 209. The gap sealing strip 204 is used for isolation treatment of the edge of the corrugated metal outer sleeve 203. The heat is transferred outward along the corrugated metal outer sleeve 203 and the gap sealing strip 204. At this time, the fire-retardant isolation ring 205 is used for segmented isolation. When the internal temperature is high, the internal water cooling heat absorption treatment can be used. After the heat is discharged, condensate water is generated. The condensate water flows to the position of the bidirectional moisture absorption mesh cage 206. The internal silica gel desiccant absorbs the condensate water. The internal isolation protection and continuous operation protection effect are realized. The internal fire and the internal high temperature generated during operation are quickly responded.

[0075] The cable is externally prevented from being pierced and insulated by the limiting insulation sleeve 223, the piercing prevention fixing strip 224 and the outer protective insulation sleeve 225, so that the stability in daily use is improved. When the cable is externally on fire, the flame directly sinters the sintering belt 222 after the limiting insulation sleeve 223, the piercing prevention fixing strip 224 and the outer protective insulation sleeve 225 are damaged by heat melting, so that a ceramic hard shell is formed. The ceramic hard shell is used for flame-retardant treatment of the inside, and the mineral wool core of the outer flame-retardant isolation belt 221 is used for heat and fire isolation treatment, so that the cable can be effectively isolated and protected when the cable is externally on fire.

[0076] When the cable is bent, the inside is bent and buffered by the elastic relay block 217 and the outer elastic special-shaped block 218, the gap generated by bending is filled by the heat expansion treatment of the inner empty buffering belt 216, so that the sealing effect is improved. In the continuous use process, the moisture in the gap of the cable is dried by the silica gel desiccant in the absorbing mesh cage 311 in the embedded fixing groove 309 and the penetrating treatment hole 310, so that the dryness is improved, the rust damage of the fixed wire core 215 caused by the environment moisture is reduced, and the stability in operation is improved.

[0077] Finally, it should be noted that: the above only for the preferred examples of the present application, and not for limiting the present application, although the present application is described in detail with reference to the foregoing examples, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A low-smoke, flame-retardant, environmentally friendly low-voltage power cable comprising a trunking isolating jacket (1), characterized in that: The relay isolation sleeve (1) is provided with a double separation component (2) at the side end; The double separation component (2) comprises a thermal expansion fire-retardant bar (201); A plurality of thermal expansion fire-retardant bars (201) are equidistantly bonded on the inner side of the relay isolation sleeve (1), and a plurality of inner different buffer bars (202) are sleeved on the inner side of the thermal expansion fire-retardant bars (201); A plurality of corrugated metal outer guide sleeves (203) are clamped on the inner side of the inner different buffer bars (202), and gap sealing bars (204) are clamped on the outer side of the corrugated metal outer guide sleeves (203); A plurality of fire-retardant isolation rings (205) are equidistantly welded on the inner side of the corrugated metal outer guide sleeve (203), and a plurality of bidirectional moisture absorption mesh cages (206) are equidistantly embedded and installed on one end of the inner side of the corrugated metal outer guide sleeve (203); A corrugated inner hollow ring belt (207) is clamped on one end of the corrugated metal outer guide sleeve (203), and a plurality of moisture absorption heat absorption belts (208) are equidistantly embedded and installed on the inner side of the corrugated inner hollow ring belt (207); A plurality of straight heat conduction holes (209) are equidistantly formed on the side end 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 bars (210) are equidistantly wound on the inner side of the corrugated inner hollow ring belt (207).

2. A low smoke, flame-retardant, environmentally friendly low voltage power cable according to claim 1, characterized in that, The side end of the inner different buffer bar (202) is attached to the side end of the gap sealing bar (204), the inner side end of the bidirectional moisture absorption mesh cage (206) is attached to the outer side end of the corrugated inner hollow ring belt (207), and the outer diameter of the corrugated inner hollow ring belt (207) is equal to the inner diameter of the bidirectional moisture absorption mesh cage (206).

3. A low smoke, flame-retardant, environmentally friendly low voltage power cable according to claim 1, characterized in that, A plurality of fire-retardant covering bars (211) are equidistantly bonded on the inner side of the isolation shielding bar (210), a heat insulation bar (212) is clamped on one end of the inner side of the plurality of fire-retardant covering bars (211), and a plurality of low-pressure cavity filling bars (213) are equidistantly formed on the inner side of the heat insulation bar (212); A plurality of low-smoke insulation sleeves (214) are clamped on the inner side of the heat insulation bar (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 on the outer side end of the relay isolation sleeve (1), and a plurality of elastic relay blocks (217) are bonded on the side end of the inner hollow buffer belt (216); An outer elastic special-shaped block (218) is clamped between two relay isolation sleeves (1), a heat insulation matching pad (219) is bonded on the side end of the outer elastic special-shaped block (218), and a plurality of outer limiting shielding bars (220) are installed on the side end of the heat insulation matching pad (219).

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

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

6. A low smoke, flame-retardant, environmentally friendly low voltage power cable according to claim 3, characterized in that, The outer limit shielding strip (220) is provided with an outer isolation flame-retardant strip (221) on the side end, the outer isolation flame-retardant strip (221) is bonded with a heat sintering strip (222) on the side end, and the heat sintering strip (222) is sleeved with a limiting insulation sleeve (223) on the side end. A plurality of anti-puncture fixing strips (224) are equidistantly arranged on the outer side end of the limiting insulation sleeve (223), and the anti-puncture fixing strips (224) are sleeved with an outer protective insulation sleeve (225) on the outer side end.

7. A low smoke, flame-retardant, environmentally friendly low voltage power cable according to claim 6, characterized in that, The heat sintering strip (222) has four, the fixed wire core (215) has three, the thermal expansion flame-retardant strip (201), the inner different buffer strip (202), the isolation shielding strip (210), the flame-retardant covering strip (211), the heat isolation strip (212), the heat insulation matching pad (219), the outer limit shielding strip (220), the outer isolation flame-retardant strip (221), the heat sintering strip (222) and the anti-puncture fixing strip (224) have an arc-shaped longitudinal section.

8. A low smoke, flame-retardant, environmentally friendly low voltage power cable according to claim 6, characterized in that, The outer protective insulation sleeve (225) is provided with a double-protection stabilizing assembly (3) on the side end. The double-protection stabilizing assembly (3) comprises a clamping position processing groove (301). A plurality of clamping position processing grooves (301) are equidistantly arranged on the side end of the outer protective insulation sleeve (225), and sealing adhesive pads (302) are embedded and mounted in the clamping position processing grooves (301). Two sealing adhesive pads (302) are bonded with threaded treatment rings (303) on the side end, and the threaded treatment rings (303) are connected with a clamping isolation sleeve (304) through threads on the side end. The clamping isolation sleeve (304) is rotatably connected with a multi-hole insulation plate (305) at one end, and a close sealing pad (306) is bonded at a position corresponding to the clamping isolation sleeve (304) on the side end of the outer protective insulation sleeve (225). A plurality of sealing adhesive pads (302) are bonded with anti-puncture fixing rings (307) on the side end, and a plurality of anti-puncture fixing bands (308) are bonded on the side end of the clamping isolation sleeve (304), the close sealing pad (306) and the anti-puncture fixing ring (307).

9. A low-smoke, flame-retardant, environmentally friendly low-voltage power cable according to claim 8, characterized in that, A plurality of inner embedded fixing grooves (309) are equidistantly arranged on the side end of the elastic relay block (217) and the outer elastic special-shaped block (218), and a through treatment hole (310) is arranged on the side end of the elastic relay block (217) and the outer elastic special-shaped block (218) corresponding to the inner embedded fixing groove (309). The threaded treatment ring (303) is in close contact with the side end of the outer protective insulation sleeve (225) on the inner side, and the clamping isolation sleeve (304) is in close contact with the close sealing pad (306) at one end.

10. A low smoke, flame-retardant, environmentally friendly low voltage power cable according to claim 9, characterized in that, The side end of the multi-hole insulation plate (305) is in close contact with the side end of the elastic relay block (217) and the outer elastic special-shaped block (218), the inner side of the plurality of anti-puncture fixing bands (308) is bonded and combined with the outer side end of the outer protective insulation sleeve (225), and one end of the absorption net cage (311) is sleeved and connected with the through treatment hole (310) on the side end. The threaded treatment ring (303) is in close contact with the side end of the outer protective insulation sleeve (225) on the inner side, and the clamping isolation sleeve (304) is in close contact with the close sealing pad (306) at one end.

Images