CN112582103B - High-strength fireproof cable - Google Patents
High-strength fireproof cable Download PDFInfo
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- CN112582103B CN112582103B CN202011412997.3A CN202011412997A CN112582103B CN 112582103 B CN112582103 B CN 112582103B CN 202011412997 A CN202011412997 A CN 202011412997A CN 112582103 B CN112582103 B CN 112582103B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1805—Protections not provided for in groups H01B7/182 - H01B7/26
- H01B7/1815—Protections not provided for in groups H01B7/182 - H01B7/26 composed of longitudinal inserts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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Abstract
The invention discloses a high-strength fireproof cable, which belongs to the technical field of power cables, and comprises a low-smoke halogen-free flame-retardant inner sheath and a cable core arranged in the low-smoke halogen-free flame-retardant inner sheath, wherein a triangular support frame is arranged in the low-smoke halogen-free flame-retardant inner sheath, the outer ends of three corners of the triangular support frame are respectively abutted against the inner wall of the low-smoke halogen-free flame-retardant inner sheath, so that the cable core can be arranged in a cavity formed by the triangular support frame and a herringbone support frame to effectively protect the cable core, the integral compression resistance of the cable is greatly improved, the integral triangular support frame can rotate in a certain range in the low-smoke halogen-free flame-retardant inner sheath, the flexibility of the cable is effectively improved, in addition, carbon dioxide can be released to effectively isolate oxygen, open fire is extinguished in a short time, and a plurality of flame-retardant materials in the cable are matched, the fireproof effect is better, great improvement the fire behavior of cable.
Description
Technical Field
The invention relates to the technical field of power cables, in particular to a high-strength fireproof cable.
Background
The power cable is used for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater. In the power lines, the cable is increasing in specific gravity. Power cables are cable products used in the trunk lines of power systems to transmit and distribute high power electrical energy, including various voltage classes, 1-500KV and above, and various insulated power cables.
The electric wire and the cable play an important role in the infrastructure of China, and with the continuous development of China, for the power cable industry, aiming at the continuously changing market and requirements, the traditional industry mode can not adapt to the market development, so that the industry transformation is not slow for many enterprises. The wire and cable industry in China is still a trend of continuous development, but seven problems exist, and the healthy continuous development of the industry is severely restricted.
Fire-proof cables are a common type of power cables, and in order to ensure data security, people hope that after a fire occurs, enough time will be available to return all data to the cage before the whole network breaks down and transfer them to a safe place, so as to minimize the possibility of data loss. Therefore, among the standards for cables, there is also a class of fire protection standards, known as "line integrity" standards. The aim of the cable is to keep the line smooth in a fire scene, so that power supply and information can still be transmitted normally. Cables that meet the requirements for series integrity are also referred to as fire cables.
The existing fireproof cable is filled with various materials capable of effectively resisting fire and fire, the fireproof effect is achieved by utilizing the higher melting point of the materials, and if open fire is generated inside the cable or the cable cracks, the fireproof effect of the fireproof materials is greatly reduced, and the application range of the fireproof cable is limited.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a high-strength fireproof cable, which can realize the effective protection of a cable core by arranging the cable core in a cavity formed by a triangular support frame and a herringbone support frame, greatly improve the overall compressive property of the cable, and the triangular support frame can rotate in a certain range in a low-smoke halogen-free flame-retardant inner sheath, so that the flexibility of the cable is effectively improved, and in addition, carbon dioxide can be released for effective oxygen isolation, so that open fire is extinguished in a short time, and the fireproof effect is better by matching with various flame-retardant materials in the cable, and the fireproof performance of the cable is greatly improved.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A high-strength fireproof cable comprises a low-smoke halogen-free flame-retardant inner sheath and a cable core arranged in the low-smoke halogen-free flame-retardant inner sheath, wherein a triangular support frame is arranged in the low-smoke halogen-free flame-retardant inner sheath, the outer ends of three corners of the triangular support frame are abutted to the inner wall of the low-smoke halogen-free flame-retardant inner sheath, the triangular support frame is a hard rubber frame, a herringbone support is arranged in the triangular support frame, the outer ends of the three corners of the herringbone support frame are abutted to the inner ends of the three corners of the triangular support frame respectively, arcs matched with the cable core are arranged at included angles of the three sides of the herringbone support frame, three installation cavities are formed by the triangular support frame and the herringbone support frame, the number of the cable cores is three, the three cable cores are arranged in the three installation cavities respectively, and the cable core is attached to the arc of the herringbone support frame, the cable core includes the cable conductor, sets up the insulating layer in the cable conductor outside and wraps up the shielding layer in the insulating layer outside, still be equipped with three fire prevention reaction ball between low smoke and zero halogen fire-retardant inner sheath and the triangle-shaped support frame, and three fire prevention reaction ball laminate three limits of triangle-shaped support frame respectively and set up, the outside parcel of low smoke and zero halogen fire-retardant inner sheath has the shielding net, the outside parcel of shielding net has low smoke and zero halogen fire-retardant oversheath. The triangular support frame is arranged in the cable, and the triangular support frame has stronger stability, firmness and pressure resistance, so that the cable core is arranged in the triangular support frame, the cable core can be effectively protected, the integral pressure resistance of the cable is greatly improved, meanwhile, the cable core is clamped in a cavity formed by the triangular support frame and the herringbone support frame, so that the cable core is further protected, and three corners of the triangular support frame are abutted against the interior of the low-smoke halogen-free flame-retardant inner sheath, the whole triangular support frame can rotate in a certain range in the interior of the low-smoke halogen-free flame-retardant inner sheath, thereby the effectual pliability that improves the cable, the fire behavior that can effectively improve the cable of first fire-resistant filling layer and shielding net of filling in the cable in addition, the further holistic performance that promotes the cable of low smoke and zero halogen flame retardant inner sheath and low smoke and zero halogen flame retardant oversheath.
Further, the fireproof reaction ball comprises a net-shaped ball body, a rubber ball is arranged inside the net-shaped ball body, a plurality of fixing cylinders distributed in an annular shape are fixed on the inner wall of the net-shaped ball body, fixing blocks are fixed at the end portions of the fixing cylinders, a plurality of mounting holes are formed in the rubber ball and fixed in the mounting holes, liquid seepage holes are formed in the centers of the fixing blocks, barrier films are fixed in the liquid seepage holes, a plurality of through holes are formed in the positions, opposite to the fixing cylinders, of the surface of the net-shaped ball body, heat conduction layers are fixed in the through holes, the heat conduction layers seal the net-shaped ball body, a piston plate is connected inside the net-shaped ball body in a sliding mode, thermal expansion materials are filled between the piston plate and the heat conduction layers, organic acid reaction liquid is filled between the piston plate and the fixing blocks, and felting needles are fixed at one ends, close to the rubber ball, of the piston plate, two groups of compression springs are further fixed between the piston plate and the fixing block, a plurality of sodium bicarbonate reactants are arranged inside the sodium bicarbonate reactants, and a plurality of sealing plug air outlet structures are arranged on the net-shaped ball body. In the cable use, when the naked light appears inside or around the cable, the temperature can rise sharply, the real-time induction temperature of heat-conducting layer of setting, thermal energy material thermal expansion extrusion felting needle, after the felting needle is extruded to impaling the barrier film, organic acid reaction liquid is extruded to rubber ball inside and sodium bicarbonate reactant contact reaction simultaneously, reaction process can produce a large amount of carbon dioxide, a large amount of carbon dioxide is given vent to anger the back by the sealing plug structure, effectual isolated oxygen, thereby make the naked light extinguish in the short time, the inside multiple flame retardant material of cooperation cable, the fire prevention effect is better, and can in time isolate the effect that oxygen was put out a fire when producing the naked light, great improvement the fire behavior of cable.
Furthermore, the sodium bicarbonate reactant is a spherical sodium bicarbonate reactant, and gaps are reserved between the spherical sodium bicarbonate reactants during stacking, so that the spherical sodium bicarbonate reactants can be fully contacted with the organic acid reaction solution, and the full reaction is ensured.
Further, the sealing plug structure of giving vent to anger includes the venthole and imbeds at the inside rubber sealing plug of venthole, the venthole is less than the inner for round platform shape air vent and outer end bore, the rubber sealing plug be with venthole assorted round platform shape sealing plug, the outer end of rubber sealing plug is connected with the location fixture block, the junction of location fixture block and venthole is equipped with sealed the pad. During initial state, because the rubber sealing plug is round platform shape sealing plug, cooperation location fixture block can seal the venthole, its inside pressure increase when the inside carbon dioxide that produces of fire prevention reaction ball, the rubber ball inflation, and the rubber ball after the inflation can be ejecting by the venthole with the rubber sealing plug to realize carbon dioxide's release.
Furthermore, the outer walls and the inner walls of the three corners of the triangular support frame are in arc transition, the outer walls of the three corners of the herringbone support frame are in arc transition, and the outer ends of the herringbone support frame are matched with the inner ends of the triangular support frame. The inner wall at three angles of triangle-shaped support frame and the outer wall at three angles of chevron shape support frame all adopt the circular arc transition, and the outer end of chevron shape support frame and the inner phase-match of triangle-shaped support frame, can fix the position of chevron shape support frame in the triangle-shaped support frame, realize the stable joint of chevron shape support frame and triangle-shaped support frame, guarantee the structural stability of triangle-shaped support frame and chevron shape support frame combination, the outer wall of triangle-shaped support frame adopts the circular arc transition, in order to be convenient for triangle-shaped support frame to produce the relative rotation in the fire-retardant inner sheath of low smoke and zero halogen, on the other hand can avoid the scratch that the triangle-shaped support frame caused the fire-retardant inner sheath of low smoke and zero halogen when producing the relative rotation in the fire-retardant inner sheath of low smoke and zero halogen.
Furthermore, the triangular support frame is made of fire-resistant rubber, the overall fire resistance of the cable is effectively improved, and the rubber has certain flexibility, so that the flexibility of the cable is effectively improved.
Furthermore, the herringbone support is a fireproof alloy plate, the overall fireproof performance of the cable is further improved, the strength of the fireproof alloy plate is high, and the overall strength of the cable is effectively improved.
Further, still pack between low smoke and zero halogen flame retardant inner sheath and the triangle-shaped support frame and have first fire-resistant filling layer, first fire-resistant filling layer is one of aluminium oxide, calcium oxide, zirconia and magnesium oxide.
Furthermore, a second refractory filling layer is filled in the mounting cavity, and the second refractory filling layer is one of silicon carbide, boron nitride and silicon nitride.
Furthermore, the shielding net is a tinned copper wire braided shielding layer.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) the triangular support frame is arranged in the cable, and the triangular support frame has stronger stability, firmness and pressure resistance, so that the cable core is arranged in the triangular support frame, the cable core can be effectively protected, the integral pressure resistance of the cable is greatly improved, meanwhile, the cable core is clamped in a cavity formed by the triangular support frame and the herringbone support frame, so that the cable core is further protected, and three corners of the triangular support frame are abutted against the interior of the low-smoke halogen-free flame-retardant inner sheath, the whole triangular support frame can rotate in a certain range in the interior of the low-smoke halogen-free flame-retardant inner sheath, thereby the effectual pliability that improves the cable, the fire behavior that can effectively improve the cable of first fire-resistant filling layer and shielding net of filling in the cable in addition, the further holistic performance that promotes the cable of low smoke and zero halogen flame retardant inner sheath and low smoke and zero halogen flame retardant oversheath.
(2) In the cable use, when the naked light appears inside or around the cable, the temperature can rise sharply, the real-time induction temperature of heat-conducting layer of setting, thermal energy material thermal expansion extrusion felting needle, after the felting needle is extruded to impaling the barrier film, organic acid reaction liquid is extruded to rubber ball inside and sodium bicarbonate reactant contact reaction simultaneously, reaction process can produce a large amount of carbon dioxide, a large amount of carbon dioxide is given vent to anger the back by the sealing plug structure, effectual isolated oxygen, thereby make the naked light extinguish in the short time, the inside multiple flame retardant material of cooperation cable, the fire prevention effect is better, and can in time isolate the effect that oxygen was put out a fire when producing the naked light, great improvement the fire behavior of cable.
(3) The sodium bicarbonate reactant is a spherical sodium bicarbonate reactant, and gaps are reserved between the spherical sodium bicarbonate reactant and the organic acid reactant when the spherical sodium bicarbonate reactant is stacked, so that the spherical sodium bicarbonate reactant can be in full contact with the organic acid reaction liquid, and the full reaction is ensured.
(4) During initial state, because the rubber sealing plug is round platform shape sealing plug, cooperation location fixture block can seal the venthole, and its internal pressure increases when the inside carbon dioxide that produces of fire prevention reaction ball, the rubber ball inflation, and the rubber sealing plug can be ejecting by the venthole to the rubber ball after the inflation to realize carbon dioxide's release.
(5) The inner wall at three angles of triangle-shaped support frame and the outer wall at three angles of chevron shape support frame all adopt the circular arc transition, and the outer end of chevron shape support frame and the inner phase-match of triangle-shaped support frame, can fix the position of chevron shape support frame in the triangle-shaped support frame, realize the stable joint of chevron shape support frame and triangle-shaped support frame, guarantee the structural stability of triangle-shaped support frame and chevron shape support combination, the outer wall of triangle-shaped support frame adopts the circular arc transition, in order to be convenient for the triangle-shaped support frame to produce relative rotation in the fire-retardant inner sheath of low smoke and zero halogen, on the other hand can avoid the scratch that the triangle-shaped support frame caused to the fire-retardant inner sheath of low smoke and zero halogen when producing relative rotation in the fire-retardant inner sheath of low smoke and zero halogen.
(6) The triangular support frame is made of fire-resistant rubber, the overall fire resistance of the cable is effectively improved, and the rubber has certain flexibility, so that the flexibility of the cable is effectively improved.
(7) The chevron shape support is the refractory alloy board, and the holistic fire behavior of further promotion cable, and refractory alloy board intensity is high, effectively improves the bulk strength of cable.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a schematic structural diagram of a fireproof reaction ball according to the present invention;
FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;
FIG. 4 is a diagram showing a state of the reaction of the fireproof reaction ball according to the present invention.
The reference numbers in the figures illustrate:
1 low smoke halogen-free flame retardant inner sheath, 2 triangular support frame, 3 herringbone support frame, 4 cable wires, 5 insulating layer, 6 shielding layer, 7 fireproof reaction ball, 701 net ball, 702 fixed cylinder, 703 heat conduction layer, 704 piston plate, 705 compression spring, 706 thermal expansion material, 707 organic acid reaction liquid, 708 pricker, 709 sodium bicarbonate reaction agent, 710 rubber ball, 711 fixed block, 712 barrier film, 8 first fireproof filling layer, 9 shielding net, 10 low smoke halogen-free flame retardant outer sheath, 11 second fireproof filling layer, 12 air outlet hole, 13 rubber sealing plug, 14 positioning fixture block.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, a high-strength fireproof cable comprises a low-smoke halogen-free flame-retardant inner sheath 1 and cable cores arranged inside the low-smoke halogen-free flame-retardant inner sheath 1, a triangular support frame 2 is arranged inside the low-smoke halogen-free flame-retardant inner sheath 1, the outer ends of three corners of the triangular support frame 2 are abutted to the inner wall of the low-smoke halogen-free flame-retardant inner sheath 1, the triangular support frame 2 is a hard rubber frame, a herringbone support frame 3 is arranged inside the triangular support frame 2, the outer ends of three corners of the herringbone support frame 3 are abutted to the inner ends of three corners of the triangular support frame 2, arcs matched with the cable cores are arranged at included angles of three sides of the herringbone support frame 3, three installation cavities are formed by the triangular support frame 2 and the herringbone support frame 3, three cable cores are arranged in the three installation cavities, and the cable cores are attached to the arcs of the herringbone support frame 3, the cable core includes cable conductor 4, the setting is at the insulating layer 5 in the cable conductor 4 outside and the shielding layer 6 of parcel in the insulating layer 5 outside, still be equipped with three fire prevention reaction ball 7 between low smoke and zero halogen fire-retardant inner sheath 1 and the triangle-shaped support frame 2, and three fire prevention reaction ball 7 laminate three limits of triangle-shaped support frame 2 respectively and set up, the outside parcel of low smoke and zero halogen fire-retardant inner sheath 1 has shielding net 9, the outside parcel of shielding net 9 has low smoke and zero halogen fire-retardant oversheath 10. The triangular support frame 2 is arranged in the cable, and the triangular support frame 2 has stronger stability, firmness and pressure resistance because of the triangular structure, the cable core is arranged in the triangular support frame 2, the cable core can be effectively protected, the integral pressure resistance of the cable is greatly improved, meanwhile, the cable core is clamped in a cavity formed by the triangular support frame 2 and the herringbone support frame 3, the cable core is further protected, and three angles of the triangular support frame 2 are abutted against the interior of the low-smoke halogen-free flame-retardant inner sheath 1, the whole triangular support frame 2 can rotate in the interior of the low-smoke halogen-free flame-retardant inner sheath 1 within a certain range, thereby the effectual pliability that improves the cable, the fire behavior that can effectively improve the cable of first fire-resistant filling layer 8 and shielding net 9 of filling in the cable in addition, the overall performance of further promotion cable of low smoke and zero halogen fire-retardant inner sheath 1 and low smoke and zero halogen fire-retardant oversheath 10.
Referring to fig. 1-2 and 4, the fireproof reaction ball 7 includes a mesh ball 701, a rubber ball 710 is disposed inside the mesh ball 701, a plurality of fixing cylinders 702 distributed in an annular shape are fixed on an inner wall of the mesh ball 701, a fixing block 711 is fixed at an end of the fixing cylinder 702, a plurality of mounting holes are disposed on the rubber ball 710, the fixing block 711 is fixed in the mounting holes, a liquid-permeable hole is disposed at a center of the fixing block 711, a barrier film 712 is fixed in the liquid-permeable hole, a plurality of through holes are disposed at positions of a surface of the mesh ball 701 opposite to the fixing cylinders 702, a heat-conducting layer 703 is fixed in the through holes, the heat-conducting layer 703 seals the mesh ball 701, a piston plate 704 is slidably connected inside the mesh ball 701, a thermal expansion material 706 is filled between the piston plate 704 and the heat-conducting layer, an organic acid reaction liquid 707 is filled between the piston plate 704 and the fixing block 704, a needle 708 is fixed at an end of the piston plate 704 close to the rubber ball 710, two groups of compression springs 705 are fixed between the piston plate 704 and the fixing block 711, a plurality of sodium bicarbonate reactants 709 are arranged in the sodium bicarbonate reactants 709, and a plurality of sealing plug air outlet structures are arranged on the reticular sphere 701. In the cable use, when the open fire appears inside or around the cable, the temperature can rise sharply, the real-time induction temperature of heat-conducting layer 703 that sets up, thermal expansion material 706 is heated the inflation and extrudes felting needle 708, after felting needle 708 is extruded to impaling barrier film 712, organic acid reaction liquid 707 is extruded simultaneously to the inside and sodium bicarbonate reactant 709 contact reaction of rubber ball 710, reaction process can produce a large amount of carbon dioxide, after a large amount of carbon dioxide overflows by the sealing plug structure of giving vent to anger, effectual isolated oxygen, thereby make the open fire extinguish in the short time, multiple flame retardant material inside the cooperation cable, the fire prevention effect is better, and can in time isolate the effect that oxygen put out a fire when producing the open fire, great improvement the fire behavior of cable.
Referring to fig. 1-2, the sodium bicarbonate reactant 709 is a spherical sodium bicarbonate reactant, and when the spherical sodium bicarbonate reactants are stacked, a gap is left between the spherical sodium bicarbonate reactants, so that the spherical sodium bicarbonate reactants can be in full contact with the organic acid reaction solution 707, and the reaction can be fully performed.
Referring to fig. 2-3, the sealing plug air outlet structure includes an air outlet 12 and a rubber sealing plug 13 embedded in the air outlet 12, the air outlet 12 is a truncated cone shaped vent hole, the outer end diameter of the air outlet is smaller than the inner end, the rubber sealing plug 13 is a truncated cone shaped sealing plug matched with the air outlet 12, the outer end of the rubber sealing plug 13 is connected with a positioning fixture block 14, and a sealing gasket is arranged at the joint of the positioning fixture block 14 and the air outlet 12. In the initial state, because the rubber sealing plug 13 is a truncated cone-shaped sealing plug, the air outlet 12 can be sealed by matching with the positioning fixture block 14, when carbon dioxide is generated inside the fireproof reaction ball 7, the internal pressure is increased, the rubber ball 710 expands, and the expanded rubber ball 710 can eject the rubber sealing plug 13 out of the air outlet 12, so that the release of the carbon dioxide is realized.
Referring to fig. 1, the outer walls and the inner walls of three corners of the triangular support frame 2 are in arc transition, the outer walls of three corners of the herringbone support frame 3 are in arc transition, and the outer end of the herringbone support frame 3 is matched with the inner end of the triangular support frame 2. The inner wall at three angles of triangle-shaped support frame 2 and the outer wall at three angles of chevron shape support frame 3 all adopt the circular arc transition, and chevron shape support frame 3's outer end and triangle-shaped support frame 2's inner phase-match, can fix the position of chevron shape support frame 3 in triangle-shaped support frame 2, realize chevron shape support frame 3 and triangle-shaped support frame 2's stable joint, guarantee the structural stability of triangle-shaped support frame 2 and chevron shape support frame 3 combination, the outer wall of triangle-shaped support frame 2 adopts the circular arc transition, so that it rotates relatively to make things convenient for triangle-shaped support frame 2 to produce in the inside relative rotation that produces of low smoke and zero halogen flame retardant inner sheath 1, on the other hand can avoid triangle-shaped support frame 2 to the scratch that low smoke and zero halogen flame retardant inner sheath 1 caused when producing relative rotation in low smoke and zero halogen flame retardant inner sheath 1.
Referring to fig. 1, the triangular support frame 2 is made of fire-resistant rubber, so that the overall fire resistance of the cable is effectively improved, and the rubber has certain flexibility, so that the flexibility of the cable is effectively improved.
Referring to fig. 1, the herringbone bracket 3 is a refractory alloy plate, so as to further improve the overall fire resistance of the cable, and the refractory alloy plate has high strength, thereby effectively improving the overall strength of the cable.
Referring to fig. 1, a first refractory filling layer 8 is further filled between the low-smoke halogen-free flame-retardant inner sheath 1 and the triangular support frame 2, and the first refractory filling layer 8 is one of alumina, calcium oxide, zirconia and magnesia.
Referring to fig. 1, the installation cavity is further filled with a second refractory filling layer 11, and the second refractory filling layer 11 is one of silicon carbide, boron nitride and silicon nitride.
Referring to fig. 1, the shielding mesh 9 is a braided shielding layer of tinned copper wire, and has a better shielding performance.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (9)
1. The utility model provides a high strength fireproof cable, includes low smoke and zero halogen flame retardant inner sheath (1) and sets up the cable core in low smoke and zero halogen flame retardant inner sheath (1) inside, its characterized in that: the inner sheath is characterized in that a triangular support frame (2) is arranged inside the low-smoke halogen-free flame-retardant inner sheath (1), the outer ends of three corners of the triangular support frame (2) are abutted to the inner wall of the low-smoke halogen-free flame-retardant inner sheath (1), the triangular support frame (2) is a hard rubber frame, a herringbone support (3) is arranged inside the triangular support frame (2), the outer ends of the three corners of the herringbone support (3) are respectively abutted to the inner ends of the three corners of the triangular support frame (2), arcs matched with cable cores are arranged at included angles of the three sides of the herringbone support (3), the triangular support frame (2) and the herringbone support (3) form three installation cavities, the number of the cable cores is three, the three cable cores are respectively arranged in the three installation cavities, and the arcs of the herringbone support (3) are arranged, the cable core comprises a cable conductor (4), an insulating layer (5) arranged on the outer side of the cable conductor (4) and a shielding layer (6) wrapped on the outer side of the insulating layer (5), three fireproof reaction balls (7) are further arranged between the low-smoke halogen-free flame-retardant inner sheath (1) and the triangular support frame (2), the three fireproof reaction balls (7) are respectively attached to three edges of the triangular support frame (2) to be arranged, the shielding net (9) is wrapped on the outer side of the low-smoke halogen-free flame-retardant inner sheath (1), and a low-smoke halogen-free flame-retardant outer sheath (10) is wrapped on the outer side of the shielding net (9); the fireproof reaction ball (7) comprises a net-shaped ball body (701), a rubber ball (710) is arranged inside the net-shaped ball body (701), a plurality of fixing cylinders (702) distributed in an annular shape are fixed on the inner wall of the net-shaped ball body (701), a fixing block (711) is fixed at the end part of each fixing cylinder (702), a plurality of mounting holes are formed in the rubber ball (710), the fixing blocks (711) are fixed in the mounting holes, liquid seepage holes are formed in the centers of the fixing blocks (711), a barrier film (712) is fixed in each liquid seepage hole, a plurality of through holes are formed in the positions, opposite to the fixing cylinders (702), of the surface of the net-shaped ball body (701), heat conduction layers (703) are fixed in the through holes, the heat conduction layers (703) are sealed by the heat conduction layers (701), a piston plate (704) is connected inside the net-shaped ball body (701) in a sliding mode, and a thermal expansion material (706) is filled between the piston plate (704) and the heat conduction layers (703), organic acid reaction liquid (707) is filled between the piston plate (704) and the fixing block (711), a puncture needle (708) is fixed at one end, close to the rubber ball (710), of the piston plate (704), two groups of compression springs (705) are further fixed between the piston plate (704) and the fixing block (711), a plurality of sodium bicarbonate reactants (709) are arranged inside the rubber ball (710), and a plurality of sealing plug air outlet structures are arranged on the rubber ball (710).
2. A high strength fire-resistant cable according to claim 1, wherein: the sodium bicarbonate reactant (709) is a spherical sodium bicarbonate reactant.
3. A high strength fire-resistant cable according to claim 1, wherein: the sealing plug structure of giving vent to anger includes venthole (12) and embedding rubber sealing plug (13) inside venthole (12), venthole (12) are less than the inner for round platform shape air vent and outer end bore, rubber sealing plug (13) are with venthole (12) assorted round platform shape sealing plug, the outer end of rubber sealing plug (13) is connected with location fixture block (14), location fixture block (14) are equipped with sealed the pad with the junction of venthole (12).
4. A high strength fire-resistant cable according to claim 1, wherein: the outer walls and the inner walls of three corners of the triangular support frame (2) are in arc transition, the outer walls of three corners of the herringbone support frame (3) are in arc transition, and the outer end of the herringbone support frame (3) is matched with the inner end of the triangular support frame (2).
5. A high strength fire-resistant cable according to claim 1, wherein: the triangular support frame (2) is made of fire-resistant rubber.
6. A high strength fire-resistant cable according to claim 1, wherein: the herringbone support (3) is a refractory alloy plate.
7. A high strength fire-resistant cable according to claim 1, wherein: still pack between low smoke and zero halogen flame retardant inner sheath (1) and triangle-shaped support frame (2) and have first fire-resistant filling layer (8), first fire-resistant filling layer (8) are one of aluminium oxide, calcium oxide, zirconia and magnesium oxide.
8. A high strength fire-resistant cable according to claim 1, wherein: and a second refractory filling layer (11) is further filled in the mounting cavity, and the second refractory filling layer (11) is one of silicon carbide, boron nitride and silicon nitride.
9. A high strength fire-resistant cable according to claim 1, wherein: the shielding net (9) is a tinned copper wire braided shielding layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011412997.3A CN112582103B (en) | 2020-12-07 | 2020-12-07 | High-strength fireproof cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011412997.3A CN112582103B (en) | 2020-12-07 | 2020-12-07 | High-strength fireproof cable |
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| CN112582103A CN112582103A (en) | 2021-03-30 |
| CN112582103B true CN112582103B (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011412997.3A Active CN112582103B (en) | 2020-12-07 | 2020-12-07 | High-strength fireproof cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113350720B (en) * | 2021-07-06 | 2022-05-17 | 扬州市兴隆塑料有限公司 | Stable PE electric power pipe of preventing distortion of plug wire |
| CN115267995B (en) * | 2022-09-01 | 2023-05-05 | 富通集团有限公司 | Underwater optical cable for shallow water area |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206116067U (en) * | 2016-10-09 | 2017-04-19 | 广东金联宇电缆实业有限公司 | Antitorque cable of triangle -shaped |
| CN206907546U (en) * | 2017-06-21 | 2018-01-19 | 深圳市成天泰电缆实业发展有限公司 | A kind of control cable with fire prevention and moisture-proof function |
| CN110415879A (en) * | 2018-04-28 | 2019-11-05 | 刘琳 | A kind of mechanical protection layer of armored cable |
| CN208400534U (en) * | 2018-06-13 | 2019-01-18 | 深圳市泰士特线缆有限公司 | Rail traffic low-smoke halogen-free flame-retardant electric wire and cable |
| CN210271838U (en) * | 2019-07-12 | 2020-04-07 | 安徽华菱电缆集团有限公司 | Flexible fireproof cable |
| CN110409971B (en) * | 2019-07-25 | 2020-11-03 | 合肥汉东装饰工程有限公司 | Energy-saving aluminum alloy fireproof window |
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