CN114384655A - Optical fiber ribbon cable for indoor access - Google Patents
Optical fiber ribbon cable for indoor access Download PDFInfo
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- CN114384655A CN114384655A CN202210082935.3A CN202210082935A CN114384655A CN 114384655 A CN114384655 A CN 114384655A CN 202210082935 A CN202210082935 A CN 202210082935A CN 114384655 A CN114384655 A CN 114384655A
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- ribbon cable
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/448—Ribbon cables
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4403—Optical cables with ribbon structure
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
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Abstract
本发明属于光缆技术领域，具体的说是一种室内接入用光纤带光缆，包括外护套，所述外护套内部设有套管，所述套管内部设有光纤本体，所述外护套中部设有加强芯；所述外护套外部设有一圈弹性层，所述弹性层外部套设有防护层，所述弹性层与防护层之间设置有间隙，且所述间隙中填充有粉末状的氢氧化镁阻燃剂；本发明中的防护层在靠近火源后受热熔化并破损，弹性层能够将防护层内部的氢氧化镁阻燃剂从漏点挤出，并对防护层起到阻燃的效果，且通过将粉末状的氢氧化镁阻燃剂直接填充在防护层与弹性层之间，不再需要对氢氧化镁表面进行改性处理，降低了光纤带光缆的加工难度。
The invention belongs to the technical field of optical cables, in particular to an optical fiber ribbon cable for indoor access, comprising an outer sheath, a sleeve is arranged inside the outer sheath, an optical fiber body is arranged inside the sleeve, and the outer sheath is provided with an optical fiber body. The middle of the sheath is provided with a reinforcing core; the outer sheath is provided with a circle of elastic layers, the outer of the elastic layer is sheathed with a protective layer, a gap is set between the elastic layer and the protective layer, and the gap is filled with There is powdered magnesium hydroxide flame retardant; the protective layer in the present invention is heated, melted and damaged after being close to the fire source, and the elastic layer can extrude the magnesium hydroxide flame retardant inside the protective layer from the leakage point, and provide protection to the protective layer. The layer plays a flame retardant effect, and by directly filling the powdered magnesium hydroxide flame retardant between the protective layer and the elastic layer, it is no longer necessary to modify the surface of the magnesium hydroxide, reducing the optical fiber ribbon cable. Processing difficulty.
Description
Technical Field
The invention belongs to the technical field of optical cables, and particularly relates to an optical fiber ribbon cable for indoor access.
Background
Fiber optic communication is one of the important ways of modern information transmission. The optical fiber cable is a communication cable and consists of two or more glass or plastic optical fiber cores, and the optical fiber cores are positioned in a protective coating and covered by a plastic PVC outer sleeve.
The chinese patent with publication number CN212083764U discloses an optical fiber ribbon cable for indoor access, including wearing layer and flame retardant coating, the top fixed mounting of wearing layer has the fixing base, and the inside of fixing base is provided with the slot, the internal connection of slot has the buckle, and the left side fixedly connected with dust cover of buckle, the flame retardant coating is located the inside of wearing layer, and the internal connection of flame retardant coating has fire-retardant layer, the first buffer layer of inside fixedly connected with on fire-retardant layer, and the internal connection of first buffer layer has the second buffer layer. This optical fiber tape cable for indoor access compares with current optical fiber tape cable device for indoor access, and the device simple process, use cost are lower, and stability and security are higher, can make the optical fiber tape cable when using for a long time simultaneously, and the holding state is indeformable, has fine crushing resistance, fire proofness and waterproof performance simultaneously, has improved the security of optic fibre.
However, although the optical fiber ribbon cable can be subjected to fire prevention through the fireproof layer and the flame retardant layer containing the magnesium hydroxide flame retardant, the magnesium hydroxide flame retardant achieves an ideal flame retardant effect, the filling amount generally reaches more than 50%, and the magnesium hydroxide is an inorganic substance, so that the surface compatibility with the high polymer base material is poor, the mechanical property of the composite material is reduced, the surface modification treatment is required, and the processing difficulty of the optical fiber ribbon cable is improved.
Accordingly, the present invention provides an optical fiber ribbon cable for indoor access.
Disclosure of Invention
To remedy the deficiencies of the prior art, at least one of the technical problems set forth in the background is addressed.
The technical scheme adopted by the invention for solving the technical problems is as follows: the optical fiber ribbon cable for indoor access comprises an outer sheath, wherein a sleeve is arranged inside the outer sheath, an optical fiber body is arranged inside the sleeve, and a reinforcing core is arranged in the middle of the outer sheath; the outer part of the outer sheath is provided with a circle of elastic layer, the outer part of the elastic layer is sleeved with a protective layer, a gap is arranged between the elastic layer and the protective layer, powdery magnesium hydroxide flame retardant is filled in the gap, and the elastic layer is in a compressed state under the extrusion of the magnesium hydroxide flame retardant; although the existing optical fiber ribbon cable can be subjected to fire prevention through the fireproof layer and the flame-retardant layer containing the magnesium hydroxide flame retardant, the magnesium hydroxide flame retardant achieves an ideal flame-retardant effect, the filling amount generally reaches more than 50%, and the magnesium hydroxide is an inorganic substance, so that the surface compatibility with a high polymer base material is poor, the mechanical property of the composite material is reduced, the surface modification treatment is required, and the processing difficulty of the optical fiber ribbon cable is improved; when the optical fiber ribbon cable meets a fire source, the part, close to the fire source, of the protective layer is heated, melted and damaged, the extruded elastic layer extrudes the magnesium hydroxide flame retardant inside the protective layer from a leakage point under the action of elasticity of the extruded elastic layer, the magnesium hydroxide absorbs heat and releases water to play a flame retardant role on the protective layer by means of chemical decomposition during heating, the extruded magnesium hydroxide can be accumulated on one side, close to the fire source, of the protective layer and decomposed into magnesium oxide to be attached to the surface of the magnesium oxide after a heating reaction, burning is further prevented, and therefore the flame retardant effect of the optical fiber ribbon cable is improved.
Preferably, the elastic layer is made of elastic membrane material, a gap is reserved between the elastic layer and the outer sheath, and the gap is filled with gas; when the inoxidizing coating meets the fire damage after, the elastic layer expands under the effect of inside atmospheric pressure this moment, and extrude the magnesium hydrate fire retardant to the inoxidizing coating outside from the leak source, move to the distance that is close enough to when the elastic layer is to the one side that is close to the fire, and when the temperature was higher, the elastic layer was close to one side melting of conflagration and the leak source appeared this moment, make its inside gas drive the optical fiber ribbon cable and move to the one side of keeping away from the fire source after the leak source blowout, thereby can reduce the damage of fire source to the optical fiber ribbon cable, and receive nail etc. to prick or destroy when the inoxidizing coating surface, when leading to the elastic layer leak source to appear, the gas of locating spun from the leak source of elastic layer this moment can drive the optical fiber ribbon cable equally and keep away from dangerous source, reduce the destruction that the foreign object caused the optical fiber ribbon cable.
Preferably, the gas filled between the elastic layer and the outer sheath is gas capable of extinguishing fire; through setting up gaseous composition between elastic layer and the oversheath, like nitrogen gas, argon gas or carbon dioxide gas for when the leak source appears in the elastic layer under the effect of burning things which may cause a fire, the gas of department spun from the leak source can play the effect of putting out a fire to the burning things which may cause a fire, and nitrogen gas, argon gas or carbon dioxide gas also have nontoxic, non-corrosive characteristic simultaneously, produced harmful effects to the oversheath when reducing the inside gas filling of elastic layer.
Preferably, the elastic layer is wave-shaped, and the convex part and the concave part of the outer wall of the elastic layer are respectively in interference fit with the surfaces of the protective layer and the outer sheath; through the shape that sets up the elastic layer for when local leak source appears in the inoxidizing coating, tortuous elastic layer can extrude the magnesium hydrate fire retardant more forcefully and rapidly from the leak source, thereby has improved the result of use of magnesium hydrate fire retardant.
Preferably, a sealing film is connected to the concave part of the outer wall of the elastic layer, and a sealing cavity between the sealing film and the elastic layer is filled with a high-temperature-resistant inorganic adhesive; when the leak source appears in the inoxidizing coating that the depressed part of elastic layer corresponds under the influence of burning things which may cause a fire disaster, this moment the elastic layer drives this depressed part under the effect of inside atmospheric pressure and moves to the one side that is close to the leak source, and it is close to the leak source in step to drive the seal membrane, melt under high temperature until the seal membrane, the leak source outflow of inoxidizing coating can be followed to its inside high temperature resistant inorganic adhesive of this moment under the extrusion of elastic layer, thereby can carry out the bonding shutoff to its leak source, the selfreparing ability of optical fiber ribbon cable when taking place the damage has been improved.
Preferably, the concave part of the elastic layer corresponding to the middle part of the sealing film is connected with a conical body; when the elastic layer drives the sealing film to move towards one side of the leak point close to the protective layer, if the external temperature is not enough to melt the sealing film, the elastic layer at the conical body can drive the conical body to move towards one side of the sealing film and puncture the sealing film under the action of the internal air pressure of the elastic layer, so that the high-temperature-resistant inorganic adhesive in the conical body can smoothly flow out, and the leak point is effectively blocked and repaired.
Preferably, the concave parts of the elastic layer corresponding to the two sides of the conical body are respectively connected with arc-shaped protecting sleeves, and the free ends of the protecting sleeves are attached in a staggered manner; the lag of setting can wrap up the pointed end of conical body, reduce the optical fiber ribbon optical cable when receiving normal extrusion and deformation, drive the condition that the conical body punctures the seal membrane, thereby improved the storage effect of seal membrane to inside high temperature resistant inorganic adhesive, and when the leak source appears in the guard layer surface, the elastic layer of conical body department stretches under the effect of inside atmospheric pressure this moment, thereby make two lags keep away from the conical body and no longer shelter from its tip, thereby make the conical body can effectually puncture the seal membrane.
Preferably, a group of arc-shaped grooves which are uniformly distributed in an annular mode are formed in the side wall of the conical body, and the arc-shaped grooves can communicate the outer portion of the protective layer with the cavity in the sealing film after the protective layer is punctured by the conical body; when the leak source appears in the inoxidizing coating, the conical body can pierce through the seal membrane under the drive of elastic layer and insert in the leak source, and the high temperature resistant inorganic adhesive of seal membrane inside can flow out to the leak source outside through the arc wall is more smooth this moment, has further improved the repair effect of high temperature resistant inorganic adhesive to the leak source.
Preferably, the outer end of the arc-shaped groove is connected with a scraping blade inclined towards one side of the sealing film, and the scraping blade can elastically deform when being pressed; when the conical body penetrates through a leakage point on the protective layer, the conical body can drive the free end of the scraping blade to scrape out the magnesium hydroxide flame retardant remained in the leakage point of the protective layer, meanwhile, the high-temperature-resistant inorganic adhesive extruded from the sealing film can apply pressure to the scraping blade, so that the free end of the scraping blade is popped out from the leakage point after being pressed and deformed, impurities such as magnesium oxide and the like attached to the periphery of the leakage point can be cleaned, and the bonding effect between the high-temperature-resistant inorganic adhesive and the protective layer is improved.
Preferably, the end part of the scraping blade is connected with a spiral furling tube, the end part of the furling tube can extend when being inflated, one surface of the scraping blade, which is close to the arc-shaped groove, is connected with a pressing bag, and the pressing bag is connected with the furling tube through an air tube; after the scraper is popped out from the leakage point under the pressure of the high-temperature-resistant inorganic adhesive, the high-temperature-resistant inorganic adhesive extrudes the pressing bag, so that gas in the pressing bag passes through the air pipe, is pressed into the winding pipe with a structure similar to a blowing structure, and drives the free end of the winding pipe to extend, the end part of the extended winding pipe can always abut against and be attached to the outer wall of the protective layer at the leakage point, impurities on the surface of the protective layer are fully and effectively cleaned under the driving of the scraper, the cleanliness of the leakage point of the protective layer is improved, meanwhile, the opened winding pipe can limit the flowing high-temperature-resistant inorganic adhesive, the high-temperature-resistant inorganic adhesive can be gathered at the leakage point in a centralized manner, and the repairing effect of the high-temperature-resistant inorganic adhesive on the leakage point of the protective layer is further improved.
The invention has the following beneficial effects:
1. the protective layer is heated and melted and damaged after being close to a fire source, the elastic layer can extrude the magnesium hydroxide fire retardant in the protective layer from a leakage point, the flame retardant effect is achieved on the protective layer, the powdered magnesium hydroxide fire retardant is directly filled between the protective layer and the elastic layer, the surface of magnesium hydroxide is not required to be modified, and the processing difficulty of the optical fiber ribbon cable is reduced.
2. When the protective layer is damaged in case of fire, one side of the elastic layer close to the fire is melted and has a leak point, so that the gas in the elastic layer is sprayed out from the leak point to drive the optical fiber ribbon cable to move to one side far away from the fire source, the damage of the fire source to the optical fiber ribbon cable can be reduced, and when the surface of the protective layer is pricked or damaged by nails and the like, the gas sprayed out from the leak point of the elastic layer can also drive the optical fiber ribbon cable to be far away from a dangerous source, and the damage of foreign objects to the optical fiber ribbon cable is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 3 is an enlarged view at A in FIG. 2;
FIG. 4 is a schematic structural view of the present invention in an operating state;
FIG. 5 is an enlarged view at B in FIG. 4;
FIG. 6 is an enlarged view at C in FIG. 5;
in the figure: the optical fiber protection device comprises an outer sheath 1, a sleeve 2, an optical fiber body 3, a reinforced core 4, an elastic layer 5, a protective layer 6, a magnesium hydroxide flame retardant 7, a sealing film 8, a conical body 9, a protective sleeve 10, an arc-shaped groove 11, a scraping sheet 12, a furling tube 13, a pressing bag 14 and an air tube 15.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, the optical fiber ribbon cable for indoor access according to the embodiment of the present invention includes an outer sheath 1, a sleeve 2 is disposed inside the outer sheath 1, an optical fiber body 3 is disposed inside the sleeve 2, and a reinforcing core 4 is disposed in the middle of the outer sheath 1; a circle of elastic layer 5 is arranged outside the outer sheath 1, a protective layer 6 is sleeved outside the elastic layer 5, a gap is formed between the elastic layer 5 and the protective layer 6, a powdery magnesium hydroxide flame retardant 7 is filled in the gap, and the elastic layer is in a compressed state under the extrusion of the magnesium hydroxide flame retardant 7; although the existing optical fiber ribbon cable can be subjected to fire prevention through the fireproof layer and the flame-retardant layer containing the magnesium hydroxide flame retardant 7, the magnesium hydroxide flame retardant 7 achieves an ideal flame-retardant effect, the filling amount generally reaches more than 50%, and the magnesium hydroxide is an inorganic substance, so that the surface compatibility with a high polymer base material is poor, the mechanical property of the composite material is reduced, the surface modification treatment is required, and the processing difficulty of the optical fiber ribbon cable is improved; when the optical fiber ribbon cable meets a fire source, the part, close to the fire source, of the protective layer 6 is heated, melted and damaged, the extruded elastic layer 5 extrudes the magnesium hydroxide flame retardant 7 in the protective layer 6 from a leakage point under the action of elasticity of the elastic layer, the magnesium hydroxide absorbs heat and releases water to achieve the flame retardant effect on the protective layer 6 by means of chemical decomposition during heating, the extruded magnesium hydroxide can be accumulated on one side, close to the fire source, of the protective layer 6 and decomposed into magnesium oxide to be attached to the surface of the magnesium oxide after a thermal reaction, and combustion is further prevented, so that the flame retardant effect of the optical fiber ribbon cable is improved, the powdered magnesium hydroxide flame retardant 7 is directly filled between the protective layer 6 and the elastic layer 5, modification treatment on the surface of the magnesium hydroxide is not needed any more, and the processing difficulty of the optical fiber ribbon cable is reduced.
Example two:
as shown in fig. 2 to 3, a first comparative example, in which another embodiment of the present invention is: the elastic layer 5 is made of elastic membrane materials, a gap is reserved between the elastic layer 5 and the outer sheath 1, and the gap is filled with gas; when inoxidizing coating 6 meets the fire damage after, elastic layer 5 inflation under the effect of inside atmospheric pressure this moment, and extrude magnesium hydrate fire retardant 7 to the inoxidizing coating 6 outsidely from the leak source, move to the distance that is close enough to when elastic layer 5 is close to one side of fire, and when the temperature is higher, elastic layer 5 melts and the leak source appears in one side that is close to the conflagration this moment, make its inside gas drive the optical fiber ribbon cable to the one side motion of keeping away from the fire source after the leak source blowout, thereby can reduce the damage of fire source to the optical fiber ribbon cable, and prick or destroy when inoxidizing coating 6 surface receives nails etc. and lead to elastic layer 5 to appear when the leak source, the gas of department blowout from elastic layer 5 this moment can drive the optical fiber ribbon equally and keep away from the dangerous source, reduce the destruction that the foreign object led to the optical fiber ribbon cable.
The gas filled between the elastic layer 5 and the outer sheath 1 is the gas capable of extinguishing fire; through setting up the gaseous composition between elastic layer 5 and the oversheath 1, like nitrogen gas, argon gas or carbon dioxide gas for when elastic layer 5 appears the leak source under the effect of burning things which may cause a fire, the gas of department spun from the leak source can play the effect of putting out a fire to the burning things which may cause a fire, and nitrogen gas, argon gas or carbon dioxide gas also have nontoxic, noncorrosive characteristic simultaneously, reduce the 5 inside filling gas of elastic layer produced harmful effects to oversheath 1 during.
The elastic layer 5 is wave-shaped, and a convex part and a concave part of the outer wall of the elastic layer 5 are respectively in interference fit with the surfaces of the protective layer 6 and the outer sheath 1; through the shape that sets up elastic layer 5 for when local leak source appears in inoxidizing coating 6, zigzag elastic layer 5 can extrude magnesium hydrate fire retardant 7 from the leak source more powerfully and rapidly, thereby has improved magnesium hydrate fire retardant 7's result of use.
A sealing film 8 is connected to a concave part of the outer wall of the elastic layer 5, and a sealing cavity between the sealing film 8 and the elastic layer 5 is filled with a high-temperature-resistant inorganic adhesive; when the leak source appears in inoxidizing coating 6 that the depressed part of elastic layer 5 corresponds under the influence of fire source, elastic layer 5 drives this depressed part under the effect of inside atmospheric pressure this moment and moves to the one side that is close to the leak source, and it is close to the leak source to drive seal membrane 8 in step, melt until seal membrane 8 under high temperature, its inside high temperature resistant inorganic adhesive can flow from the leak source of inoxidizing coating 6 under elastic layer 5's extrusion this moment, thereby can carry out bonding shutoff to its leak source, the self repair ability of fibre-optical ribbon cable when taking place the damage has been improved.
The concave part of the elastic layer 5 corresponding to the middle part of the sealing film 8 is connected with a conical body 9; when the elastic layer 5 drives the sealing film 8 to move towards the side of the leak point close to the protective layer 6, if the external temperature is not enough to melt the sealing film 8, the elastic layer 5 at the conical body 9 can drive the conical body 9 to move towards the side of the sealing film 8 and puncture the sealing film under the action of the internal air pressure of the elastic layer 5, so that the high-temperature-resistant inorganic adhesive in the conical body can smoothly flow out, and the leak point can be effectively blocked and repaired.
The concave parts of the elastic layer 5 corresponding to the two sides of the conical body 9 are respectively connected with an arc-shaped protecting sleeve 10, and the free ends of the protecting sleeves 10 are attached in a staggered mode; the lag 10 that sets up can wrap up conical body 9's most advanced, reduce the optical fiber ribbon optical cable when receiving normal extrusion and deformation, drive conical body 9 with the condition that seal membrane 8 punctures, thereby seal membrane 8 has been improved to the storage effect of inside high temperature resistant inorganic adhesive, and when the leak source appears on 6 surfaces of inoxidizing coating, elastic layer 5 of conical body 9 department at this moment stretches under the effect of inside atmospheric pressure, thereby make two lags 10 keep away from conical body 9 and no longer shelter from its tip, thereby make conical body 9 can effectually puncture seal membrane 8.
As shown in fig. 4-6, a group of arc-shaped grooves 11 are formed in the side wall of the conical body 9, and the arc-shaped grooves 11 are uniformly distributed in a ring shape, and can communicate the outside of the protective layer 6 with the chamber inside the sealing film 8 after the conical body 9 punctures the protective layer 6; when the leak source appears in inoxidizing coating 6, conical body 9 can puncture seal membrane 8 and insert in the leak source under the drive of elastic layer 5, and the high temperature resistant inorganic adhesive of seal membrane 8 inside can be through the more smooth outflow of arc groove 11 to the leak source outside this moment, has further improved the repair effect of high temperature resistant inorganic adhesive to the leak source.
The outer end of the arc-shaped groove 11 is connected with a scraping blade 12 which inclines towards one side of the sealing film 8, and the scraping blade 12 can elastically deform when being pressed; when the conical body 9 penetrates through a leakage point on the protective layer 6, the conical body 9 can drive the free end of the scraping piece 12 to scrape out the magnesium hydroxide flame retardant 7 remained in the leakage point of the protective layer 6, meanwhile, the high-temperature-resistant inorganic adhesive extruded from the sealing film 8 can apply pressure to the scraping piece 12, so that the free end of the scraping piece 12 is popped out from the leakage point after being pressed and deformed, impurities such as magnesium oxide and the like attached to the periphery of the leakage point can be scraped and cleaned, and the bonding effect between the high-temperature-resistant inorganic adhesive and the protective layer 6 is improved.
The end part of the scraping blade 12 is connected with a spiral furling tube 13, the end part of the furling tube 13 can extend when being inflated, one surface of the scraping blade 12 close to the arc-shaped groove 11 is connected with a pressing bag 14, and the pressing bag 14 is connected with the furling tube 13 through an air tube 15; after the scraping blade 12 is popped out from the leakage point under the pressure of the high-temperature-resistant inorganic adhesive, the high-temperature-resistant inorganic adhesive extrudes the pressing bag 14, so that the gas in the pressing bag 14 passes through the gas pipe 15 and is pressed into the furling tube 13 similar to a 'blowing dragon' structure, and the free end of the furling tube 13 is driven to extend, the end part of the extended furling tube 13 can always abut against the outer wall of the protective layer 6 at the leakage point, impurities on the surface of the protective layer 6 are fully and effectively cleaned under the driving of the scraping blade 12, the cleanliness at the leakage point of the protective layer 6 is improved, meanwhile, the opened furling tube 13 can limit the flowing-out high-temperature-resistant inorganic adhesive, the high-temperature-resistant inorganic adhesive can be gathered at the leakage point in a centralized manner, and the repairing effect of the high-temperature-resistant inorganic adhesive on the leakage point of the protective layer 6 is further improved.
The working principle is as follows: the part of the protective layer 6 close to a fire source is heated, melted and damaged, at the moment, the extruded elastic layer 5 extrudes the magnesium hydroxide fire retardant 7 in the protective layer 6 from a leakage point under the action of elasticity of the elastic layer, the magnesium hydroxide absorbs heat by means of chemical decomposition during heating and releases water to play a flame retardant role on the protective layer 6, the extruded magnesium hydroxide can be accumulated on one side of the protective layer 6 close to the fire source and decomposed into magnesium oxide attached to the surface of the magnesium oxide after being heated to react, so that the combustion is further prevented, the flame retardant effect of the optical fiber ribbon cable is improved, and the powdered magnesium hydroxide fire retardant 7 is directly filled between the protective layer 6 and the elastic layer 5, the surface of the magnesium hydroxide is not required to be modified, and the processing difficulty of the optical fiber ribbon cable is reduced; when the protective layer 6 is damaged in case of fire, the elastic layer 5 expands under the action of internal air pressure, and the magnesium hydroxide flame retardant 7 is extruded out of the protective layer 6 from a leak point, when the elastic layer 5 moves to a side close to a fire source to a sufficiently short distance and the temperature is high, one side of the elastic layer 5 close to the fire is melted and the leak point appears, so that the gas in the elastic layer 5 is sprayed out from the leak point to drive the optical fiber ribbon cable to move to a side far away from the fire source, and therefore the damage of the fire source to the optical fiber ribbon cable can be reduced, and when the surface of the protective layer 6 is pricked or damaged by nails and the like to cause the leak point to appear in the elastic layer 5, the gas sprayed out from the leak point of the elastic layer 5 can also drive the optical fiber ribbon cable to be far away from a dangerous source, and the damage of foreign objects to the optical fiber ribbon cable is reduced; through arranging gas components such as nitrogen, argon or carbon dioxide between the elastic layer 5 and the outer sheath 1, when the elastic layer 5 generates a leak point under the action of a fire source, the gas sprayed from the leak point can play a fire extinguishing effect on the fire source, and meanwhile, the nitrogen, argon or carbon dioxide gas also has the characteristics of no toxicity and no corrosiveness, so that the adverse effect on the outer sheath 1 when the elastic layer 5 is filled with gas is reduced; by arranging the shape of the elastic layer 5, when local leakage points appear on the protective layer 6, the bent elastic layer 5 can more effectively and rapidly extrude the magnesium hydroxide flame retardant 7 from the leakage points, so that the using effect of the magnesium hydroxide flame retardant 7 is improved; when a leak point occurs on the protection layer 6 corresponding to the depressed part of the elastic layer 5 under the influence of a fire source, the elastic layer 5 drives the depressed part to move towards one side close to the leak point under the action of internal air pressure and drives the sealing film 8 to synchronously approach the leak point until the sealing film 8 is melted at high temperature, and at the moment, the high-temperature-resistant inorganic adhesive in the elastic layer 5 can flow out from the leak point of the protection layer 6 under the extrusion of the elastic layer 5, so that the leak point can be bonded and blocked, and the self-repairing capability of the optical fiber ribbon cable when the optical fiber ribbon cable is damaged is improved; when the elastic layer 5 drives the sealing film 8 to move towards one side of a leak point close to the protective layer 6, if the external temperature is not enough to melt the sealing film 8, the elastic layer 5 at the conical body 9 can drive the conical body 9 to move towards one side of the sealing film 8 and puncture the sealing film under the action of the internal air pressure of the elastic layer 5, so that the high-temperature-resistant inorganic adhesive in the conical body 9 can smoothly flow out, and the leak point can be effectively blocked and repaired; the arranged protecting sleeves 10 can wrap the tips of the conical bodies 9, the situation that the optical fiber ribbon cables are normally extruded and deformed to drive the conical bodies 9 to puncture the sealing films 8 is reduced, the storage effect of the sealing films 8 on the internal high-temperature-resistant inorganic adhesive is improved, when leakage points appear on the surfaces of the protecting layers 6, the elastic layers 5 at the positions of the conical bodies 9 stretch under the action of internal air pressure, the two protecting sleeves 10 are far away from the conical bodies 9 and do not shield the end parts of the conical bodies any more, and therefore the conical bodies 9 can effectively puncture the sealing films 8; when a leak point occurs on the protective layer 6, the conical body 9 can pierce the sealing film 8 and insert the sealing film into the leak point under the driving of the elastic layer 5, and at the moment, the high-temperature-resistant inorganic adhesive in the sealing film 8 can flow out of the leak point more smoothly through the arc-shaped groove 11, so that the repair effect of the high-temperature-resistant inorganic adhesive on the leak point is further improved; when the conical body 9 penetrates through a leakage point on the protective layer 6, the conical body 9 can drive the free end of the scraping piece 12 to scrape out the magnesium hydroxide flame retardant 7 remained in the leakage point of the protective layer 6, meanwhile, the high-temperature-resistant inorganic adhesive extruded from the sealing film 8 can apply pressure on the scraping piece 12, so that the free end of the scraping piece 12 is popped out from the leakage point after being pressed and deformed, impurities such as magnesium oxide and the like attached to the periphery of the leakage point can be scraped and cleaned, and the bonding effect between the high-temperature-resistant inorganic adhesive and the protective layer 6 is improved; after the scraping blade 12 is popped out from the leakage point under the pressure of the high-temperature-resistant inorganic adhesive, the high-temperature-resistant inorganic adhesive extrudes the pressing bag 14, so that the gas in the pressing bag 14 passes through the gas pipe 15 and is pressed into the furling tube 13 similar to a 'blowing dragon' structure, and the free end of the furling tube 13 is driven to extend, the end part of the extended furling tube 13 can always abut against the outer wall of the protective layer 6 at the leakage point, impurities on the surface of the protective layer 6 are fully and effectively cleaned under the driving of the scraping blade 12, the cleanliness at the leakage point of the protective layer 6 is improved, meanwhile, the opened furling tube 13 can limit the flowing-out high-temperature-resistant inorganic adhesive, the high-temperature-resistant inorganic adhesive can be gathered at the leakage point in a centralized manner, and the repairing effect of the high-temperature-resistant inorganic adhesive on the leakage point of the protective layer 6 is further improved.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. An optical fiber ribbon cable for indoor access comprises an outer sheath (1), wherein a sleeve (2) is arranged inside the outer sheath (1), an optical fiber body (3) is arranged inside the sleeve (2), and a reinforcing core (4) is arranged in the middle of the outer sheath (1); the method is characterized in that: oversheath (1) outside is equipped with round elastic layer (5), the outside cover of elastic layer (5) is equipped with inoxidizing coating (6), be provided with the clearance between elastic layer (5) and inoxidizing coating (6), just it has powdered magnesium hydrate fire retardant (7) to fill in the clearance, the elastic layer is in the compression state under the extrusion of magnesium hydrate fire retardant (7).
2. An optical fiber ribbon cable for indoor access according to claim 1, wherein: the elastic layer (5) is made of elastic membrane materials, a gap is formed between the elastic layer (5) and the outer sheath (1), and gas is filled in the gap.
3. An optical fiber ribbon cable for indoor access according to claim 2, wherein: the gas filled between the elastic layer (5) and the outer sheath (1) is the gas capable of extinguishing fire.
4. An optical fiber ribbon cable for indoor access according to claim 3, wherein: elastic layer (5) set up to the wave, just the bulge and the depressed part of elastic layer (5) outer wall respectively with inoxidizing coating (6) and oversheath (1) surface interference laminating.
5. An optical fiber ribbon cable for indoor access according to claim 4, wherein: the concave part department of elastic layer (5) outer wall is connected with seal membrane (8), it has high temperature resistant inorganic adhesive to fill in the sealed cavity between seal membrane (8) and elastic layer (5).
6. An optical fiber ribbon cable for indoor access according to claim 5, wherein: the concave part of the elastic layer (5) corresponding to the middle part of the sealing film (8) is connected with a conical body (9).
7. An optical fiber ribbon cable for indoor access according to claim 6, wherein: the concave parts of the elastic layer (5) corresponding to the two sides of the conical body (9) are respectively connected with an arc-shaped protecting sleeve (10), and the free ends of the protecting sleeves (10) are attached in a staggered mode.
8. An optical fiber ribbon cable for indoor access according to claim 6, wherein: set up arc wall (11) of a set of annular equipartition on conical body (9) lateral wall, arc wall (11) can pierce inoxidizing coating (6) back in conical body (9), communicate inoxidizing coating (6) outside and the inside cavity of seal membrane (8).
9. An optical fiber ribbon cable for indoor access according to claim 8, wherein: the outer end of the arc-shaped groove (11) is connected with a scraping blade (12) which inclines to one side of the sealing film (8), and the scraping blade (12) can elastically deform when being pressed.
10. An optical fiber ribbon cable for indoor access according to claim 9, wherein: the end part of the scraping piece (12) is connected with a spiral winding pipe (13), the end part of the winding pipe (13) can extend when being inflated, one surface, close to the arc-shaped groove (11), of the scraping piece (12) is connected with a pressing bag (14), and the pressing bag (14) is connected with the winding pipe (13) through an air pipe (15).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210082935.3A CN114384655A (en) | 2022-01-25 | 2022-01-25 | Optical fiber ribbon cable for indoor access |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210082935.3A CN114384655A (en) | 2022-01-25 | 2022-01-25 | Optical fiber ribbon cable for indoor access |
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| CN114384655A true CN114384655A (en) | 2022-04-22 |
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| CN202210082935.3A Pending CN114384655A (en) | 2022-01-25 | 2022-01-25 | Optical fiber ribbon cable for indoor access |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114859488A (en) * | 2022-04-27 | 2022-08-05 | 扬州恒通通讯光缆有限公司 | Flame-retardant and fire-resistant optical cable |
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