CN113192668B - Isolated flexible mineral insulation fireproof cable for nuclear industry - Google Patents
Isolated flexible mineral insulation fireproof cable for nuclear industry Download PDFInfo
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- CN113192668B CN113192668B CN202110448325.6A CN202110448325A CN113192668B CN 113192668 B CN113192668 B CN 113192668B CN 202110448325 A CN202110448325 A CN 202110448325A CN 113192668 B CN113192668 B CN 113192668B
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- H—ELECTRICITY
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
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- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
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- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/10—Insulating conductors or cables by longitudinal lapping
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
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- H—ELECTRICITY
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/221—Sheathing; Armouring; Screening; Applying other protective layers filling-up interstices
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- H—ELECTRICITY
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
- H01B13/245—Sheathing; Armouring; Screening; Applying other protective layers by extrusion of metal layers
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- H—ELECTRICITY
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
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- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/32—Filling or coating with impervious material
- H01B13/322—Filling or coating with impervious material the material being a liquid, jelly-like or viscous substance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/34—Apparatus or processes specially adapted for manufacturing conductors or cables for marking conductors or cables
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/04—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
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- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
- H01B3/421—Polyesters
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
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- 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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- 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
- H01B7/1895—Internal space filling-up means
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- 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
- H01B7/20—Metal tubes, e.g. lead sheaths
- H01B7/204—Metal tubes, e.g. lead sheaths composed of lead
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- H—ELECTRICITY
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The invention discloses an isolated flexible mineral insulation fireproof cable for nuclear industry, which comprises a hinged copper conductor, a polyester tape and mica tape insulation wrapping layer, a nano aluminum-based alloy sheath, a double-layer cross-linked polyolefin co-extrusion layer, a filling strip, a flame-retardant tape wrapping layer and a low-smoke halogen-free polyolefin sheath layer; the invention relates to the technical field of fireproof cables, and discloses a composite cable which is characterized in that a polyester tape and a mica tape insulating wrapping layer are coated on the surface of a hinged copper conductor, and a nano aluminum-based alloy sheath is coated on the surfaces of the polyester tape and the mica tape insulating wrapping layer. According to the isolated flexible mineral insulation fireproof cable for the nuclear industry, feasible fire prevention in aspects such as a grouting component filling layer and a double-layer cross-linked polyolefin co-extrusion layer is provided through the design of the fireproof performance of the cable, the realizability of the fireproof performance of the cable is effectively realized, and the situation that various fires are caused by short circuit in the use process of the cable is avoided.
Description
Technical Field
The invention relates to the technical field of fireproof cables, in particular to an isolated flexible mineral insulation fireproof cable for the nuclear industry.
Background
Since the power cable needs to pass through building facilities and areas with relatively dense population, and the power cable in the areas is more susceptible to power accidents due to the influence of complex natural factors, the power cable needs to have reliable fireproof function in order to prevent the power accidents from causing fire disasters or causing secondary accidents under the condition of being damaged by fire disasters. The fire alarm device has the effects that when a fire disaster happens, a fire alarm circuit and an important power supply cable can keep normal and continuous power supply within a specified time at a specified flame temperature, so that fire rescue is facilitated to be carried out, and casualties and economic losses are reduced as much as possible. Therefore, the improvement of fire-resistant temperature and the extension of combustion time become the most important technical ideas of fireproof cable design.
The existing fireproof cable has the following problems in use:
(1) The high temperature resistance is poor, and the high temperature flame resistant cable is easy to damage and cannot be operated under extreme conditions.
(2) When the cable is detected, the cable is inconvenient to take up and pay off.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an isolated flexible mineral insulated fireproof cable for the nuclear industry, which solves the problems of poor high-temperature resistance, easy damage under high-temperature flame and incapability of operating under extreme conditions.
In order to realize the purpose, the invention is realized by the following technical scheme: an isolated flexible mineral insulation fireproof cable for nuclear industry: the cable comprises a hinged copper conductor, a polyester tape and mica tape insulating wrapping layer, a nano aluminum-based alloy sheath, a double-layer cross-linked polyolefin co-extrusion layer, a filling strip, a flame-retardant tape wrapping layer and a low-smoke halogen-free polyolefin sheath layer;
the twisted copper conductor is characterized in that the polyester tape and the mica tape insulating wrapping layer are coated on the surface of the twisted copper conductor, the nano aluminum-based alloy sheath is coated on the surface of the polyester tape and the mica tape insulating wrapping layer, the double-layer cross-linked polyolefin co-extrusion layer is coated on the surface of the nano aluminum-based alloy sheath, the flame-retardant tape wrapping layer is coated on the surface of the double-layer cross-linked polyolefin co-extrusion layer, the low-smoke halogen-free polyolefin sheath layer is coated on the surface of the flame-retardant tape wrapping layer, a gap between the flame-retardant tape wrapping layer and the double-layer cross-linked polyolefin co-extrusion layer is filled with a grouting component, and the filling strip is positioned in an inner cavity of the flame-retardant tape wrapping layer;
the preparation method of the isolated flexible mineral insulated fireproof cable comprises the following steps:
drawing a copper rod to obtain a single-core copper wire, twisting a monofilament to obtain a twisted copper conductor, wrapping a polyester tape and a mica tape on the surface of the twisted copper conductor by a wrapping machine, and preparing to obtain a polyester tape and mica tape insulating wrapping layer;
adding the nano aluminum-based alloy into an extruder, extruding the nano aluminum-based alloy on the surface of a polyester tape and mica tape insulating wrapping layer to prepare a nano aluminum-based alloy sheath, cooling and forming, adding a polyolefin raw material into the extruder, extruding the polyolefin raw material on the surface of the nano aluminum-based alloy sheath to form a polyolefin co-extrusion layer, irradiating by irradiation equipment to change a linear molecular structure into a three-dimensional reticular molecular structure to form a double-layer cross-linked polyolefin co-extrusion layer, wrapping a flame-retardant tape wrapping layer on the surface of the double-layer cross-linked polyolefin co-extrusion layer, filling grouting components in a gap between the flame-retardant tape wrapping layer and the double-layer cross-linked polyolefin co-extrusion layer, extruding a low-smoke halogen-free polyolefin sheath layer to prepare a cable, continuously performing irradiation treatment on the surface of the low-smoke halogen-free polyolefin sheath layer, and then performing character printing;
and step three, detecting a finished cable product through detection equipment, winding the cable on the surface of the pay-off roller, extending the cable between the movable clamping plate and the fixed clamping plate, starting the clamping cylinder, driving the movable clamping plate to move to clamp the cable through the arc-shaped clamping plate, starting the driving motor to drive the driving shaft to rotate, driving the sliding part to move leftwards in the separation plate, driving the cable to the left side of the test box, winding the cable on the surface of the take-up roller, performing anti-combustion detection through the combustion head, and packaging and warehousing after the detection is finished to finish production.
As a further scheme of the invention: and the irradiation equipment in the second step bombards the polyolefin co-extrusion layer by using high-energy electron beams generated by the electron accelerator, breaks molecular chains to form macromolecular free radicals, and then recombines the macromolecular free radicals into cross-linked bonds to change the linear molecular structure into a three-dimensional reticular molecular structure so as to form the double-layer cross-linked polyolefin co-extrusion layer.
As a further scheme of the invention: the mica in the polyester tape and mica tape insulating wrapping layer is phlogopite or synthetic mica.
As a further scheme of the invention: the filler strip is made of low-smoke halogen-free flame-retardant polyolefin.
As a further scheme of the invention: the grouting component is aluminum hydroxide or magnesium hydroxide grouting.
As a further scheme of the invention: the flame temperature detected in the middle of the third step is 950 ℃.
As a further scheme of the invention: the third-step middle test comprises a mechanical impact test.
Detection device includes the base, the top fixedly connected with test box of base, the top of base rotates respectively and is connected with the unwrapping wire roller and receives the line roller, the right side fixedly connected with driving motor of test box, the left end of driving motor output shaft passes through shaft coupling fixedly connected with drive shaft, the left end of drive shaft runs through the right side of test box and extends to the inner chamber of test box, the surface of drive shaft is connected with the inner chamber rotation of test box, the inner chamber fixedly connected with division board of test box, the top sliding connection of division board has the slider, the bottom of slider runs through the top of division board and extends to the below of division board, the left end of drive shaft runs through the right side of slider and extends to the left side of slider, the surface of drive shaft and the inner chamber threaded connection of slider, the bottom fixedly connected with centre gripping cylinder of slider, the one end fixedly connected with activity splint of centre gripping cylinder piston rod, one side fixedly connected with solid fixed splint of centre gripping cylinder, the equal fixedly connected with arc-shaped grip block in surface of activity splint and solid fixed splint, the bottom fixedly connected with combustion head of division board, the top fixedly connected with fuel supply with case, the intercommunication is supplied with fuel with the test box with the one end of combustion head and the test box left side of cable extends to the left side of test box.
Advantageous effects
The invention provides an isolated flexible mineral insulated fireproof cable for nuclear industry. Compared with the prior art, the method has the following beneficial effects:
1. an isolated flexible mineral insulation fireproof cable for nuclear industry comprises a hinged copper conductor, a polyester tape and mica tape insulation wrapping layer, a nano aluminum-based alloy sheath, a double-layer cross-linked polyolefin co-extrusion layer, a filling strip, a flame-retardant tape wrapping layer and a low-smoke halogen-free polyolefin sheath layer; the cable comprises a hinged copper conductor, a polyester tape and a mica tape insulation wrapping layer, a nano aluminum-based alloy sheath is coated on the surface of the polyester tape and the mica tape insulation wrapping layer, a double-layer cross-linked polyolefin co-extrusion layer is coated on the surface of the nano aluminum-based alloy sheath, a flame-retardant tape wrapping layer is coated on the surface of the double-layer cross-linked polyolefin co-extrusion layer, a low-smoke halogen-free polyolefin sheath layer is coated on the surface of the flame-retardant tape wrapping layer, a gap between the flame-retardant tape wrapping layer and the double-layer cross-linked polyolefin co-extrusion layer is filled with grouting components, a filling strip is positioned in an inner cavity of the flame-retardant tape wrapping layer, and through the design of the fireproof performance of the cable, the feasible fireproofing in the aspects of the grouting component filling layer, the double-layer cross-linked polyolefin co-extrusion layer and the like is provided, the realizability of the fireproof performance of the cable is effectively realized, and the occurrence of various fires caused by short circuit in the use of the cable is avoided.
2. An isolated flexible mineral insulation fireproof cable for nuclear industry is provided, a test box is fixedly connected with the top of a base, the top of the base is respectively and rotatably connected with a pay-off roller and a take-up roller, a driving motor is fixedly connected with the right side of the test box, the left end of an output shaft of the driving motor is fixedly connected with a driving shaft through a coupler, the left end of the driving shaft penetrates through the right side of the test box and extends to the inner cavity of the test box, the surface of the driving shaft is rotatably connected with the inner cavity of the test box, a partition plate is fixedly connected with the inner cavity of the test box, a sliding part is slidably connected with the top of the partition plate, the bottom of the sliding part penetrates through the top of the partition plate and extends to the lower side of the partition plate, the left end of the driving shaft penetrates through the right side of the sliding part and extends to the left side of the sliding part, the surface of the driving shaft is in threaded connection with the inner cavity of the sliding part, and the bottom of the sliding part is fixedly connected with a clamping cylinder, one end of a piston rod of a clamping cylinder is fixedly connected with a movable clamping plate, one side of the clamping cylinder is fixedly connected with a fixed clamping plate, the surfaces of the movable clamping plate and the fixed clamping plate are fixedly connected with an arc-shaped clamping plate, the bottom of a partition plate is fixedly connected with a combustion head, the top of a test box is fixedly connected with a fuel supply box, the combustion head is communicated with the fuel supply box, one end of a cable penetrates through the right side of the test box and extends to the left side of the test box, the cable is wound on the surface of a pay-off roller, then the cable is extended between the movable clamping plate and the fixed clamping plate, then the clamping cylinder is started, the movable clamping plate is driven by the clamping cylinder to move to clamp the cable through the arc-shaped clamping plate, a driving motor is started to drive a driving shaft to rotate, a sliding piece is driven to move leftwards in the partition plate, the cable is driven to the left side of the test box and is wound on the surface of a take-up roller, and then anti-burning detection is carried out through the combustion head, the cable can be quickly passed through the detection equipment to be wound and unwound, and the cable winding and unwinding device is simple in operation and convenient to use.
Drawings
FIG. 1 is a cross-sectional view of the construction of the fire-rated cable of the present invention;
FIG. 2 is a schematic view of the structural connection of the detecting device of the present invention;
FIG. 3 is a sectional view of the detecting unit of the present invention;
figure 4 is a side view of the clamp cylinder arrangement of the present invention.
In the figure: 11. a twisted copper conductor; 12. the polyester tape and the mica tape are used for insulating a wrapping layer; 13. a nano aluminum-based alloy sheath; 14. a double-layer cross-linked polyolefin co-extrusion layer; 15. filling the strips; 16. a flame retardant tape-wrapped cladding; 17. a low-smoke halogen-free polyolefin sheath layer; 18. grouting components; 21. a base; 22. a test box; 23. a paying-off roller; 24. a wire take-up roller; 25. a drive motor; 26. a drive shaft; 27. a partition plate; 28. a slider; 29. a clamping cylinder; 30. a movable splint; 31. fixing the clamping plate; 32. an arc-shaped clamping plate; 33. a burner head; 34. a fuel supply tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: an isolated flexible mineral insulation fireproof cable for nuclear industry comprises a hinged copper conductor 11, a polyester tape and mica tape insulation wrapping layer 12, a nano aluminum-based alloy sheath 13, a double-layer cross-linked polyolefin co-extrusion layer 14, a filling strip 15, a flame-retardant tape wrapping layer 16 and a low-smoke halogen-free polyolefin sheath layer 17;
the surface of the hinged copper conductor 11 is coated with a polyester tape and mica tape insulating wrapping layer 12, the surface of the polyester tape and mica tape insulating wrapping layer 12 is coated with a nano aluminum-based alloy sheath 13, the surface of the nano aluminum-based alloy sheath 13 is coated with a double-layer cross-linked polyolefin co-extruded layer 14, the surface of the double-layer cross-linked polyolefin co-extruded layer 14 is coated with a flame-retardant tape wrapping layer 16, a low-smoke halogen-free polyolefin sheath layer 17 is coated on the surface of the flame-retardant tape wrapping layer 16, a gap between the flame-retardant tape wrapping layer 16 and the double-layer cross-linked polyolefin co-extruded layer 14 is filled with a grouting component 18, and a filling strip 15 is positioned in an inner cavity of the flame-retardant tape wrapping layer 16;
the preparation method of the isolated flexible mineral insulated fireproof cable comprises the following steps:
drawing a copper rod to obtain a single-core copper wire, twisting the single wire to obtain a hinged copper conductor 11, wrapping a polyester tape and a mica tape on the surface of the hinged copper conductor 11 through a wrapping machine, and preparing to obtain a polyester tape and mica tape insulating wrapping layer 12;
adding a nano aluminum-based alloy into an extruder, extruding the nano aluminum-based alloy on the surface of a polyester tape and mica tape insulating wrapping layer 12 to obtain a nano aluminum-based alloy sheath 13, cooling and forming, adding a polyolefin raw material into the extruder, extruding the polyolefin raw material on the surface of the nano aluminum-based alloy sheath 13 to form a polyolefin co-extrusion layer, irradiating by using irradiation equipment to change a linear molecular structure into a three-dimensional reticular molecular structure to form a double-layer cross-linked polyolefin co-extrusion layer 14, wrapping a flame-retardant tape wrapping layer 16 on the surface of the double-layer cross-linked polyolefin co-extrusion layer 14, filling a grouting component 18 in a gap between the flame-retardant tape wrapping layer 16 and the double-layer cross-linked polyolefin co-extrusion layer 14, extruding a low-smoke halogen-free polyolefin sheath layer 17 to obtain a cable, continuously irradiating the surface of the low-smoke halogen-free polyolefin sheath layer 17, and then printing characters;
thirdly, detecting a finished cable product through detection equipment, winding the cable on the surface of the pay-off roller 23, extending the cable between the movable clamping plate 30 and the fixed clamping plate 31, starting the clamping cylinder 29, driving the movable clamping plate 30 to move through the arc-shaped clamping plate 32 to clamp the cable by the clamping cylinder 29, starting the driving motor 25 to drive the driving shaft 26 to rotate, driving the sliding piece 28 to move leftwards in the partition plate 27, driving the cable to the left side of the test box 22, winding the cable on the surface of the take-up roller 24, performing anti-combustion detection through the combustion head 33, and packaging and warehousing after detection to finish production;
the detection device comprises a base 21, a test box 22 is fixedly connected to the top of the base 21, a pay-off roller 23 and a take-up roller 24 are respectively and rotatably connected to the top of the base 21, a driving motor 25 is fixedly connected to the right side of the test box 22, a driving shaft 26 is fixedly connected to the left end of an output shaft of the driving motor 25 through a coupler, the left end of the driving shaft 26 penetrates through the right side of the test box 22 and extends to an inner cavity of the test box 22, the surface of the driving shaft 26 is rotatably connected with the inner cavity of the test box 22, a partition plate 27 is fixedly connected to the inner cavity of the test box 22, a sliding part 28 is slidably connected to the top of the partition plate 27, the bottom of the sliding part 28 penetrates through the top of the partition plate 27 and extends to the lower side of the partition plate 27, the left end of the driving shaft 26 penetrates through the right side of the sliding part 28 and extends to the left side of the sliding part 28, the surface of the driving shaft 26 is in threaded connection with the inner cavity of the sliding part 28, a clamping cylinder 29 is fixedly connected with a clamping cylinder 29, one end of a piston rod of the clamping cylinder 30 is fixedly connected with a fixed clamping plate 31, the surfaces of the movable clamping plate 30 and the clamping plate 30 are fixedly connected with arc-shaped clamping plates 32, a combustion head 33 is fixedly connected to the bottom of the test box 22, and a fuel head 34 of the test box 22 is connected with the left side of the test box 22 and extends to the left side of the test box 22 and communicates with a fuel head of the test box 22.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation and a specific orientation configuration and operation, and thus, should not be construed as limiting the present invention. Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through two or more elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (1)
1. The utility model provides a flexible mineral insulation fireproof cable of isolated form for nuclear industry which characterized in that: the cable comprises a hinged copper conductor (11), a polyester tape and mica tape insulating wrapping layer (12), a nano aluminum-based alloy sheath (13), a double-layer cross-linked polyolefin co-extrusion layer (14), a filling strip (15), a flame-retardant tape wrapping layer (16) and a low-smoke halogen-free polyolefin sheath layer (17);
the cable is characterized in that the polyester tape and mica tape insulating wrapping layer (12) is coated on the surface of the twisted copper conductor (11), the nano aluminum-based alloy sheath (13) is coated on the surface of the polyester tape and mica tape insulating wrapping layer (12), the double-layer cross-linked polyolefin co-extrusion layer (14) is coated on the surface of the nano aluminum-based alloy sheath (13), the flame-retardant tape wrapping layer (16) is coated on the surface of the double-layer cross-linked polyolefin co-extrusion layer (14), the low-smoke halogen-free polyolefin sheath layer (17) is coated on the surface of the flame-retardant tape wrapping layer (16), a grouting component (18) is filled in a gap between the flame-retardant tape wrapping layer (16) and the double-layer cross-linked polyolefin co-extrusion layer (14), and the filling strip (15) is located in an inner cavity of the flame-retardant tape wrapping layer (16);
the preparation method of the isolated flexible mineral insulation fireproof cable comprises the following steps:
drawing a copper rod to obtain a single-core copper wire, twisting a monofilament to obtain a twisted copper conductor (11), wrapping a polyester tape and a mica tape on the surface of the twisted copper conductor (11) through a wrapping machine, and preparing to obtain a polyester tape and mica tape insulating wrapping layer (12);
adding the nano aluminum-based alloy into an extruder, extruding the nano aluminum-based alloy on the surface of a polyester tape and mica tape insulating wrapping layer (12) to obtain a nano aluminum-based alloy sheath (13), cooling and forming, adding a polyolefin raw material into the extruder, extruding the polyolefin raw material on the surface of the nano aluminum-based alloy sheath (13) to form a polyolefin co-extrusion layer, irradiating by irradiation equipment to change a linear molecular structure into a three-dimensional reticular molecular structure to form a double-layer cross-linked polyolefin co-extrusion layer (14), wrapping a flame-retardant tape wrapping layer (16) on the surface of the double-layer cross-linked polyolefin co-extrusion layer (14), filling a grouting component (18) in a gap between the flame-retardant tape wrapping layer (16) and the double-layer cross-linked polyolefin co-extrusion layer (14), extruding a low-smoke halogen-free polyolefin sheath layer (17) to obtain a cable, continuously performing irradiation treatment on the surface of the low-smoke halogen-free polyolefin sheath layer (17), and then performing printing;
thirdly, detecting a finished cable product through detection equipment, winding the cable on the surface of a pay-off roller (23), extending the cable between a movable clamping plate (30) and a fixed clamping plate (31), starting a clamping cylinder (29), driving the movable clamping plate (30) to move by the clamping cylinder (29), clamping the cable through an arc-shaped clamping plate (32), starting a driving motor (25), driving a driving shaft (26) to rotate, driving a sliding part (28) to move leftwards in a separation plate (27), driving the cable to the left side of a test box (22), winding the cable on the surface of a take-up roller (24), performing anti-combustion detection through a combustion head (33), and packaging and warehousing to finish production after detection; the irradiation equipment in the second step bombards the polyolefin co-extrusion layer by using high-energy electron beams generated by an electron accelerator, breaks molecular chains to form macromolecular free radicals, then recombines the macromolecular free radicals into cross-linked bonds, and changes a linear molecular structure into a three-dimensional reticular molecular structure to form a double-layer cross-linked polyolefin co-extrusion layer (14); mica in the polyester tape and mica tape insulating wrapping layer (12) is phlogopite or synthetic mica; the filling strips (15) are made of low-smoke halogen-free flame-retardant polyolefin materials; the grouting component (18) is aluminum hydroxide or magnesium hydroxide grouting; detecting the flame temperature to be 950 ℃ in the middle of the third step; the detection in the middle of the third step comprises a mechanical impact test;
the detection device comprises a base (21), a test box (22) is fixedly connected to the top of the base (21), the top of the base (21) is respectively and rotatably connected with a pay-off roller (23) and a take-up roller (24), a driving motor (25) is fixedly connected to the right side of the test box (22), a driving shaft (26) is fixedly connected to the left end of an output shaft of the driving motor (25) through a coupler, the left end of the driving shaft (26) penetrates through the right side of the test box (22) and extends to the inner cavity of the test box (22), the surface of the driving shaft (26) is rotatably connected with the inner cavity of the test box (22), a partition plate (27) is fixedly connected to the inner cavity of the test box (22), and a sliding part (28) is slidably connected to the top of the partition plate (27), the bottom of slider (28) runs through the top of division board (27) and extends to the below of division board (27), the left end of drive shaft (26) runs through the right side of slider (28) and extends to the left side of slider (28), the surface of drive shaft (26) and the inner chamber threaded connection of slider (28), the bottom fixedly connected with centre gripping cylinder (29) of slider (28), the one end fixedly connected with movable clamp plate (30) of centre gripping cylinder (29) piston rod, one side fixedly connected with fixed clamp plate (31) of centre gripping cylinder (29), the equal fixedly connected with arc centre gripping in surface of movable clamp plate (30) and fixed clamp plate (31) centre gripping The bottom of the partition plate (27) is fixedly connected with a combustion head (33), the top of the test box (22) is fixedly connected with a fuel supply box (34), the combustion head (33) is communicated with the fuel supply box (34), and one end of a cable penetrates through the right side of the test box (22) and extends to the left side of the test box (22).
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