CN117649975B - Flame-retardant fire-resistant spray-proof special measurement cable for fourth-generation nuclear power and preparation method thereof - Google Patents
Flame-retardant fire-resistant spray-proof special measurement cable for fourth-generation nuclear power and preparation method thereof Download PDFInfo
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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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- 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
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01B3/18—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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/48—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances fibrous materials
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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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
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Abstract
The application discloses a flame-retardant fire-resistant spraying-proof special measurement cable for a fourth-generation nuclear power and a preparation method thereof, wherein the cable sequentially comprises the following structures from inside to outside: the waterproof flame-retardant protective sleeve comprises a conductor layer (1), an insulating layer (2), a filling layer (3), a first layer of tape (4), a blowout prevention shower layer (5), a lead wire (6), a shielding layer (7), a second layer of tape (8) and a waterproof flame-retardant protective sleeve layer (9). Wherein the water-resistant flame-retardant sheath layer (9) is made of a sheath layer material; the sheath layer material comprises the following raw materials: polypropylene resin, an antioxidant, a flame retardant, a coupling agent, titanium dioxide, aromatic oil, diatomite, montmorillonite, sodium ditridecyl sulfosuccinate modified ramie fibers. The flame-retardant fire-resistant spraying-proof special measurement cable for the fourth-generation nuclear power has the advantages of good flame-retardant effect and good waterproof effect.
Description
Technical Field
The application relates to the technical field of cables, in particular to a flame-retardant fire-resistant spraying-proof special measurement cable for a fourth-generation nuclear power and a preparation method thereof.
Background
The cable is visible everywhere in life, and the flame retardance and the waterproof performance of the cable are important for guaranteeing the life safety of people. However, the current cable cannot meet the requirements of good waterproof performance and flame retardance. Among them, the sheath material of the cable plays a key role in flame retardant property. The sheath layer is the outermost layer of the cable and plays a role in protecting the inner wires and the insulating layer. For the cable in the inflammable environment, the flame retardant property of the sheath layer can effectively slow down the spreading speed of flame and prevent fire from spreading to the inside of the cable. This is important for improving the safety of the cable and reducing the risk of fire. However, currently used jacket layer materials each have advantages and disadvantages. Some sheath materials have relatively poor flame retardant properties, and cannot effectively prevent fire, increasing the potential risk of fire. In addition, part of the sheath material generates toxic gas during combustion, thereby bringing more difficulty to fire extinguishment and personnel evacuation. In addition, some jacket materials also have poor water resistance and are prone to moisture and damage to the cable.
Disclosure of Invention
In order to solve at least one technical problem, a cable with good waterproof property and good flame retardance is developed, and the application provides a flame-retardant fire-resistant spraying-resistant special measurement cable for a fourth-generation nuclear power and a preparation method thereof.
In a first aspect, the application provides a flame-retardant fire-resistant spraying-proof special measurement cable for a fourth-generation nuclear power, which sequentially comprises the following structures from inside to outside: the waterproof flame-retardant protective sleeve comprises a conductor layer 1, an insulating layer 2, a filling layer 3, a first layer of wrapping tape 4, a blowout prevention bath layer 5, a lead wire 6, a shielding layer 7, a second layer of wrapping tape 8 and a waterproof flame-retardant protective sleeve layer 9;
The insulating layer 2 is prepared by extruding insulating materials on a conductor, wherein the insulating materials comprise ceramic silicon rubber; the blowout prevention shower layer 5 is of a ceramic silicon tape and copper strip overlapped wrapping composite structure.
By adopting the technical scheme, the flame-retardant fire-resistant spray-proof special measurement cable for the fourth-generation nuclear power has stronger flame-retardant effect and waterproof effect, the application adopts the method of extruding ceramic silicone rubber on a conductor to form an insulating layer, and a composite structure of overlapping and wrapping a ceramic silicon tape and a copper tape is arranged on the first layer of wrapping tape to form a blowout prevention shower layer, so that the flame retardance and the water resistance of the cable can be improved. When the ceramic silica gel and the ceramic silica gel tape are ignited and burnt, a layer of hard insulating shell is formed, mutual conduction between wire cores is avoided, water is prevented from penetrating into the cable core, and the copper belt can block water outside the cable core to the greatest extent when the copper belt plays a shielding role. In conclusion, the flame-retardant fire-resistant spraying-proof special measurement cable for the fourth-generation nuclear power has a strong flame-retardant effect and a waterproof effect.
Optionally, the waterproof flame-retardant sheath layer 9 is made of a sheath layer material, and the sheath layer material comprises the following raw materials in parts by weight: 120-180 parts of polypropylene resin, 0.7-1.3 parts of antioxidant, 12-20 parts of flame retardant, 2-4 parts of coupling agent, 8-15 parts of titanium pigment, 3-5 parts of aromatic oil, 10-15 parts of diatomite, 20-30 parts of montmorillonite, and 15-25 parts of sodium ditridecyl sulfosuccinate modified ramie fiber.
By adopting the technical scheme, the waterproof flame-retardant sheath material prepared by the application has the advantages of flame retardance and good waterproof effect, wherein the sodium ditridecyl sulfosuccinate modified ramie fiber can provide a stronger waterproof effect for the sheath material, and when the sheath material is prepared, the spreading speed of fire on the sheath layer can be delayed by using diatomite and montmorillonite, so that the damage of fire on cables is reduced.
Optionally, the sheath layer material comprises the following raw materials in parts by weight: 150-180 parts of polypropylene resin, 1-1.3 parts of antioxidant, 15-20 parts of flame retardant, 3-4 parts of coupling agent, 10-15 parts of titanium pigment, 4-5 parts of aromatic oil, 13-15 parts of diatomite, 25-30 parts of montmorillonite, and 18.75-25 parts of sodium ditridecyl sulfosuccinate modified ramie fiber.
Optionally, the weight ratio of the flame retardant to the modified ramie fibers is 1: (1.2-1.3).
By adopting the technical scheme, when the weight ratio of the flame retardant to the modified ramie fibers is 1: (1.2-1.3), the prepared sheath layer material has better waterproof effect and flame retardant effect.
Optionally, the flame retardant comprises magnesium hydroxide, aluminum hydroxide, and antimony trioxide; wherein the weight ratio of the magnesium hydroxide to the aluminum hydroxide to the antimonous oxide is (2-3): (2-3): (0.5-1).
By adopting the technical scheme, the sheath layer material prepared by the application has a strong flame-retardant effect. According to the application, the flame retardant compounded from magnesium hydroxide, aluminum hydroxide and antimony trioxide can be used for better improving the flame retardant effect of the prepared sheath layer material, and the flame retardant effect of the compounded flame retardant is much stronger than that of a single flame retardant.
Preferably, the weight ratio of the magnesium hydroxide to the aluminum hydroxide to the antimony trioxide is 2.7:2.7:0.8, optionally, the sodium ditridecyl sulfosuccinate modified ramie fiber comprises the following components in percentage by weight (5-8): (1-3): (100-120): (0.2-0.3): the ramie fiber (40-60), sodium hydroxide, sodium ditridecyl sulfosuccinate, dopamine hydrochloride and solvent.
By adopting the technical scheme, when the sheath material is prepared, the sodium ditridecyl sulfosuccinate is adhered to the surface of the ramie fiber through modification, so that the properties of the ramie fiber can be changed, the ramie fiber has higher hydrophobicity, the modified ramie fiber has stronger waterproof effect in the sheath material, and the penetration of moisture can be effectively blocked, so that the inside of the cable is protected from moisture erosion.
Optionally, the solvent is a mixed solution of Tris-HCl buffer solution and absolute ethyl alcohol, wherein the weight ratio of the Tris-HCl buffer solution to the absolute ethyl alcohol is 1:2.
Optionally, the sheath layer material further comprises 10-20 parts of light calcium carbonate.
By adopting the technical scheme, when the sheath layer material is prepared, the light calcium carbonate is added, so that the light calcium carbonate can be filled in small holes in the sheath layer material, and stronger compactness can be provided for the sheath layer material, thereby further protecting conductors and insulating materials and preventing moisture and external pollutants from penetrating into the cable. Meanwhile, since the light calcium carbonate has lower density, the addition of the light calcium carbonate to the jacket layer material can reduce the overall density of the material, which can reduce the overall weight of the cable, make it lighter, easy to install and maintain, and reduce the burden on the cable support structure. In addition, when the cable sheath layer material is prepared, the light calcium carbonate is added, so that the overall flame retardant property of the cable can be further improved, and the fire resistance of the cable is improved, thereby improving the safety performance of the cable under the condition of fire. In summary, by adding the light calcium carbonate into the sheath layer material, stronger compactness can be provided for the sheath layer material, the weight of the material is reduced, and the flame retardant property of the material is further improved.
In a second aspect, the application provides a preparation method of a flame-retardant fire-resistant spray-proof special measurement cable for a fourth-generation nuclear power, and the preparation method of the sheath layer material comprises the following steps:
s1, boiling ramie fibers by using a sodium hydroxide aqueous solution, and mixing the ramie fibers with a solvent to prepare a first mixed solution;
S2, mixing sodium ditridecyl sulfosuccinate and dopamine hydrochloride, adding the first mixed solution, stirring and polymerizing for 1-2 d at 37 ℃, flushing and drying to obtain sodium ditridecyl sulfosuccinate modified ramie fibers;
s3, respectively calcining the diatomite and the montmorillonite to obtain pretreated diatomite and pretreated montmorillonite;
S4, dividing aromatic hydrocarbon oil into two parts, and mixing the first part of aromatic hydrocarbon oil with the sodium ditridecyl sulfosuccinate modified ramie fibers to prepare a second mixed solution;
S5, sequentially adding polypropylene resin, an antioxidant, a flame retardant, a coupling agent, titanium pigment, pretreated diatomite and pretreated montmorillonite into the second aromatic oil, mixing and stirring to obtain a flame retardant mixed solution, spraying the second mixed solution obtained in the step S4 into the flame retardant mixed solution in a mist form for coating treatment, extruding, granulating, forming and cutting to obtain the sheath layer material.
By adopting the technical scheme, when the sheath layer material is prepared, the better sheath layer material with stronger flame retardant effect and waterproof effect can be prepared by the preparation method. According to the application, the mixed solution of aromatic hydrocarbon oil and sodium ditridecyl sulfosuccinate modified ramie fiber is adhered to the granulating surface in a spraying manner, so that the material has a strong waterproof effect.
In summary, the present invention includes at least one of the following beneficial technical effects:
1. The special flame-retardant fire-resistant spray-proof measurement cable for the fourth-generation nuclear power has a strong flame-retardant effect and a waterproof effect, and the ceramic silicon rubber is extruded on a conductor to form an insulating layer, and then a composite structure of overlapping and wrapping a ceramic silicon tape and a copper strip is arranged on a first layer of wrapping tape to form a spray-proof bath layer, so that the flame retardance and the water resistance of the cable can be improved. When the ceramic silica gel and the ceramic silica gel tape are ignited and burnt, a layer of hard insulating shell is formed, mutual conduction between wire cores is avoided, water is prevented from penetrating into the cable core, and the copper belt can block water outside the cable core to the greatest extent when the copper belt plays a shielding role. In conclusion, the flame-retardant fire-resistant spraying-proof special measurement cable for the fourth-generation nuclear power has a strong flame-retardant effect and a waterproof effect.
2. The waterproof flame-retardant sheath material prepared by the application has the advantages of flame retardance and good waterproof effect, wherein the sodium ditridecyl sulfosuccinate modified ramie fiber can provide a stronger waterproof effect for the sheath material, and when the sheath material is prepared, the spread speed of fire on the sheath layer can be delayed by using diatomite and montmorillonite, so that the damage of fire on cables is reduced.
3. When the sheath layer material is prepared, the light calcium carbonate is added, so that the light calcium carbonate can be filled in small holes in the sheath layer material, and stronger compactness can be provided for the sheath layer material, thereby further protecting conductors and insulating materials and preventing moisture and external pollutants from penetrating into the cable. Meanwhile, since the light calcium carbonate has lower density, the addition of the light calcium carbonate to the jacket layer material can reduce the overall density of the material, which can reduce the overall weight of the cable, make it lighter, easy to install and maintain, and reduce the burden on the cable support structure. In addition, when the cable sheath layer material is prepared, the light calcium carbonate is added, so that the overall flame retardant property of the cable can be further improved, and the fire resistance of the cable is improved, thereby improving the safety performance of the cable under the condition of fire. In summary, by adding the light calcium carbonate into the sheath layer material, stronger compactness can be provided for the sheath layer material, the weight of the material is reduced, and the flame retardant property of the material is further improved.
4. When the material for the sheath layer is prepared, the light calcium carbonate is added into the material for the sheath layer, so that stronger compactness can be provided for the material for the sheath layer, the weight of the material is reduced, and the flame retardant property of the material is further improved.
5. When the sheath layer material is prepared, the preparation method can prepare the better sheath layer material with stronger flame retardant effect and waterproof effect. According to the application, the mixed solution of aromatic hydrocarbon oil and sodium ditridecyl sulfosuccinate modified ramie fiber is adhered to the granulating surface in a spraying manner, so that the material has a strong waterproof effect.
Drawings
FIG. 1 is a block diagram of a flame-retardant fire-resistant spray-proof special measurement cable for a fourth-generation nuclear power provided in embodiment 1;
Reference numerals illustrate: 1. a conductor layer; 2. an insulating layer, 3, a filling layer; 4. a first layer of tape; 5. a blowout prevention shower layer; 6. a lead wire; 7. a shielding layer; 8. a second layer of tape; 9. a water-resistant flame-retardant sheath layer; 10. a conductor.
Detailed Description
The application is described in further detail below with reference to the drawings and examples.
The application provides a flame-retardant fire-resistant spraying-proof special measurement cable for a fourth-generation nuclear power, which sequentially comprises the following structures from inside to outside: the waterproof flame-retardant protective sleeve comprises a conductor layer 1, an insulating layer 2, a filling layer 3, a first layer of wrapping tape 4, a blowout prevention bath layer 5, a lead wire 6, a shielding layer 7, a second layer of wrapping tape 8 and a waterproof flame-retardant protective sleeve layer 9; the structure diagram of the flame-retardant fire-resistant spray-proof special measurement cable for the fourth-generation nuclear power is shown in fig. 1.
The conductor layer 1 is formed by a plurality of conductors 10; the conductor is made of electrical round copper wires by twisting.
The insulating layer 2 is extruded on the conductor by adopting natural-color ceramic silicon rubber as an insulating material.
The filling layer 3 is filled with inorganic paper ropes.
The first layer of wrapping tape 4 is arranged outside the filling layer 3; the first layer of wrapping tape 4 is a layer of halogen-free low-smoke flame-retardant wrapping tape.
The blowout prevention shower layer 5 is a composite structure formed by overlapping and wrapping a ceramic silicon tape and a copper tape on a first layer of wrapping tape.
The lead wire 6 is a round copper wire.
The shielding layer 7 is a copper strip.
The second layer of wrapping tape 8 is a layer of halogen-free low-smoke flame-retardant wrapping tape.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Gamma-aminopropyl methyldimethoxy silane: CAS number 3663-44-3, purity 97%.
Antioxidant 1010: CAS number 6683-19-8.
Polypropylene resin: CAS number 86403-32-9, purity 99%.
Aromatic oil: CAS number 166142-78-8.
Diatomaceous earth: the silica content was 95%.
Montmorillonite: the purity was 98%.
Sulfosuccinic acid bis sodium tridecyl ester: CAS number 2673-22-5.
Ramie fiber: jingde county Jin Weima, inc.; the goods number is 008.
Sodium hydroxide: the purity was 97%.
Dopamine hydrochloride: the content of the effective components is 98%.
Magnesium hydroxide: the content of the effective components is 99%.
Aluminum hydroxide: the content of the effective components is 99%.
Antimony trioxide: the content of the effective components is 99%.
Ceramic silicone rubber: wo Erxing, model TC9711.
Copper strip: haicheng, copper industry limited.
Ceramic silicone tape: fructus Foeniculi, suzhou electronic technologies Co., ltd; the product number is 003002.
Preparation example 1
The preparation example provides a sheath layer material, which comprises the following raw materials in parts by weight: 120 parts of polypropylene resin, 0.7 part of antioxidant, 12 parts of flame retardant, 2 parts of coupling agent, 8 parts of titanium pigment, 3 parts of aromatic oil, 10 parts of diatomite, 20 parts of montmorillonite and 15 parts of sodium ditridecyl sulfosuccinate modified ramie fiber.
The preparation method of the sheath layer material comprises the following steps:
S1, boiling ramie fibers by using a sodium hydroxide aqueous solution (the concentration is 10 mol/L), and mixing the ramie fibers with a solvent to obtain a first mixed solution;
S2, mixing sodium ditridecyl sulfosuccinate and dopamine hydrochloride, adding the first mixture, stirring and polymerizing for 1d at 37 ℃, washing and drying to obtain sodium ditridecyl sulfosuccinate modified ramie fibers;
S3, respectively carrying out high-temperature calcination treatment (the calcination temperature is 1000 ℃ and the time is 3 hours) on the diatomite and the montmorillonite to prepare pretreated diatomite and pretreated montmorillonite;
s4, dividing aromatic hydrocarbon oil into two equal parts, and mixing the first part of aromatic hydrocarbon oil with the sodium ditridecyl sulfosuccinate modified ramie fibers to prepare a second mixed solution;
S5, sequentially adding polypropylene resin, an antioxidant, a flame retardant, a coupling agent, titanium pigment, pretreated diatomite and pretreated montmorillonite into the second aromatic oil, mixing and stirring in a high-speed mixer to obtain a flame retardant mixed solution, spraying the mixed solution obtained in the step S4 into the flame retardant mixed solution in a mist form for coating treatment, extruding and granulating, forming, and cutting to obtain the sheath layer material.
In the preparation example, the raw materials used in the preparation of the sodium ditridecyl sulfosuccinate modified ramie fiber and the weight ratio of the raw materials are as follows:
The sodium ditridecyl sulfosuccinate modified ramie fiber comprises the following components in percentage by weight: 1:100:0.2:40, sodium hydroxide, sodium ditridecyl sulfosuccinate, dopamine hydrochloride and solvent. The solvent in the preparation is a mixed solution of Tris-HCl buffer solution and absolute ethyl alcohol, wherein the weight ratio of the Tris-HCl buffer solution to the absolute ethyl alcohol is 1:2.
The flame retardant in the preparation example comprises magnesium hydroxide, aluminum hydroxide and antimony trioxide, wherein the weight ratio of the magnesium hydroxide to the aluminum hydroxide to the antimony trioxide is 2:2:0.5.
The antioxidant in this preparation example is antioxidant 1010.
The coupling agent in this preparation example is gamma-aminopropyl methyldimethoxy silane.
Preparation examples 2 to 5
Preparation examples 2 to 5 differ from preparation example 1 in the parts by weight of the partial components, see Table 1.
Table 1-see Table for a part of the differences between preparation examples 2 to 5 and preparation example 1
Comparative examples 1 to 6
Comparative example 1
The difference between this comparative example and preparation example 4 is that unmodified ramie fibers are used in this comparative example.
Comparative example 2
The difference between this comparative example and preparation example 4 is that the sodium ditridecyl sulfosuccinate modified ramie fibers are not added.
Comparative example 3
The present comparative example is different from preparation example 4 in that all raw materials are mixed to prepare a sheathing material at the time of preparing the sheathing material. The preparation method comprises the following steps:
Mixing polypropylene resin, an antioxidant, a flame retardant, a coupling agent, titanium dioxide, aromatic oil, diatomite, montmorillonite, sodium ditridecyl sulfosuccinate modified ramie fibers, stirring, extruding, granulating, forming and cutting to obtain the sheath layer material.
Comparative example 4
The comparative example differs from preparation example 4 in that the flame retardant in the comparative example is aluminum hydroxide.
Comparative example 5
The comparative example differs from preparation example 4 in that the flame retardant in the comparative example is magnesium hydroxide.
Comparative example 6
The comparative example differs from preparation example 4 in that the flame retardant in the comparative example is antimony trioxide.
Example 1
The embodiment provides a fire-retardant fire-resistant special measurement cable that prevents spraying for fourth generation nuclear power, and the cable includes following structure from inside to outside in proper order: the waterproof flame-retardant protective sleeve comprises a conductor layer 1, an insulating layer 2, a filling layer 3, a first layer of wrapping tape 4, a blowout prevention bath layer 5, a lead wire 6, a shielding layer 7, a second layer of wrapping tape 8 and a waterproof flame-retardant protective sleeve layer 9; the water-resistant flame-retardant sheath layer in the embodiment is made of the sheath layer material prepared in preparation 1. The structure diagram of the flame-retardant fire-resistant spray-proof special measurement cable for the fourth-generation nuclear power in the embodiment is shown in fig. 1.
The conductor layer 1 is formed by a plurality of conductors 10; the conductor is made of electrical round copper wires by twisting.
The insulating layer 2 is extruded on the conductor by adopting natural-color ceramic silicon rubber as an insulating material.
The filling layer 3 is filled with inorganic paper ropes.
The first layer of wrapping tape 4 is arranged outside the filling layer 3; the first layer of wrapping tape 4 is a layer of halogen-free low-smoke flame-retardant wrapping tape.
The blowout prevention shower layer 5 is a composite structure formed by overlapping and wrapping a ceramic silicon tape and a copper tape on a first layer of wrapping tape.
The lead wire 6 is a round copper wire.
The shielding layer 7 is a copper strip.
The second layer of wrapping tape 8 is a layer of halogen-free low-smoke flame-retardant wrapping tape.
The water-resistant flame-retardant sheath layer is prepared from the sheath layer material prepared in preparation example 1. The preparation method of the sheath layer comprises the following steps: and (3) melting, extruding and coating the sheath layer material on the second layer of the wrapping belt to form the waterproof flame-retardant sheath layer.
Examples 2 to 5
Examples 2 to 5 and application comparative examples 1 to 6 differ from example 1 in the sheath materials used in the preparation of the flame-retardant fire-resistant spray-resistant special measurement cable for fourth generation nuclear power, and the differences are shown in table 2.
Table 2-examples 2 to 5 and the differences between the application of comparative examples 1 to 6 and example 1 are shown in the table
| Options | Sheath layer |
| Example 1 | Preparation example 1 |
| Example 2 | Preparation example 2 |
| Example 3 | Preparation example 3 |
| Example 4 | Preparation example 4 |
| Example 5 | Preparation example 5 |
| Comparative example 1 was used | Comparative example 1 |
| Comparative example 2 was used | Comparative example 2 |
| Comparative example 3 was used | Comparative example 3 |
| Comparative example 4 was used | Comparative example 4 |
| Comparative example 5 was used | Comparative example 5 |
| Comparative example 6 was used | Comparative example 6 |
Comparative example 7 was used
The difference between the application comparative example and the example 4 is that the application comparative example is not provided with an insulating layer when the special type measurement cable for the fire-retardant fire-resistant spraying prevention for the fourth-generation nuclear power is prepared.
Comparative example 8 was used
The difference between the application comparative example and the example 4 is that the application comparative example is not provided with a blowout prevention shower layer when the flame-retardant fire-resistant blowout prevention special measurement cable for the fourth-generation nuclear power is prepared.
Comparative example 9 was used
The difference between the application comparative example and the example 4 is that the application comparative example is not provided with a blowout prevention bath layer and an insulating layer when the flame-retardant fire-resistant blowout prevention special type measurement cable for the fourth-generation nuclear power is prepared.
Comparative example 10 was used
The difference between the application comparative example and the example 4 is that the anti-spraying shower layer only winds the ceramic silicon tape when the application comparative example is used for preparing the flame-retardant fire-resistant anti-spraying special type measuring cable for the fourth-generation nuclear power.
Experimental detection
The experimental detection is to detect the flame retardant effect, the waterproof effect and the resistivity of the flame retardant fire resistant spray proof special measurement cable for the fourth generation nuclear power prepared in the examples 1 to 5 and the first application comparative examples 1 to 10. The experimental results of this experimental test are shown in table 3.
Flame retardant effect: flame retardant rating was determined according to GB/T18380.
Waterproof effect: the water resistance was measured under test conditions (current 60Hz frequency, water immersion temperature: 50.+ -. 1 ℃ C.) of 5.5 (specification of polypropylene resin Material for wire and Cable of ASTMD 2219-02) for a dielectric constant change rate at 14 days.
Resistivity test: the sheath materials prepared in preparation examples 1 to 5 and comparative examples 1 to 6 were tabletted on a flat vulcanizing machine for 10min at a pressure of 15MPa for preparing a sample with a thickness of 3mm, and performance test was performed on the sample according to GB/T-32129-2015 standard.
Table 3-examples 1 to 5 and the results of the experimental tests using comparative examples 1 to 10 are shown in Table
Analysis of results: examples 2 to 5 differ from example 1 in that examples 2 to 5, when preparing the sheath material, have a weight ratio of flame retardant to sodium ditridecyl sulfosuccinate modified ramie fibers of 1: under the condition of 1.25, the weight parts of other components are changed, and the experimental detection result in table 2 shows that the sheath material prepared in example 4 has better waterproof effect and volume resistivity.
The difference between comparative example 1 and example 4 is that in the preparation of the sheath material, unmodified ramie fibers are used. Referring to the test results of Table 3, it is apparent that the waterproof effect of the prepared sheathing material is poor when the ramie fibers are not modified.
The difference between comparative example 2 and example 4 is that the inventive comparative example was carried out without the addition of sodium ditridecyl sulfosuccinate modified ramie fibers in the preparation of the sheath material. Referring to the test results of Table 3, it is apparent that the waterproof effect of the prepared sheathing material is poor when the ramie fibers are not modified.
The difference between comparative example 3 and example 4 is that this comparative example produces a jacket material by mixing all the raw materials in the preparation of the jacket material. As can be seen from the test results of table 3, when all the components were mixed at one time in the preparation of the sheathing material, the prepared sheathing material had poor waterproof effect. Therefore, in order to avoid the problem of poor water resistance, the application effectively avoids the problem of the application of the comparative example 3 by adopting the measure of spraying the mixed solution prepared in the step S4 into the flame retardant mixed solution for coating treatment when preparing the sheath layer material.
Comparative example 4 is different from example 4 in that the flame retardant in this comparative example is aluminum hydroxide.
The difference between comparative example 5 and example 4 is that the flame retardant in this comparative example is magnesium hydroxide.
The difference between comparative example 6 and example 4 is that the flame retardant in this comparative example is antimony trioxide. The test results of comparative examples 4 to 5 were combined to show that the prepared sheath material had excellent flame retardancy when compounded with magnesium hydroxide, aluminum hydroxide and antimony trioxide.
The difference between the application comparative example 7 and the example 4 is that the application comparative example is not provided with an insulating layer when preparing the special type measurement cable for the fire-retardant fire-resistant and spray-resistant for the fourth generation nuclear power. From the experimental results shown in Table 3, it was found that the cable without the insulating layer had poor flame retardancy.
The difference between the application comparative example 8 and the example 4 is that the application comparative example is not provided with a blowout prevention shower layer when the flame-retardant fire-resistant blowout prevention special type measurement cable for the fourth-generation nuclear power is prepared. The test results in combination with Table 3 show that the cables without the blowout prevention layer had poor flame retardancy and water repellency.
The difference between the application comparative example 9 and the example 4 is that the application comparative example is not provided with a blowout prevention bath layer and an insulating layer when the flame-retardant fire-resistant blowout prevention special type measurement cable for the fourth-generation nuclear power is prepared.
The difference between the application comparative example 10 and the application example 4 is that the blowout prevention shower layer is only wound with the ceramic silicon tape when the application comparative example is used for preparing the fire-retardant fire-resistant blowout prevention special type measurement cable for the fourth-generation nuclear power. As is clear from the experimental test results of table 3 and comparative examples 7 to 10, if the cable is prepared without the blowout prevention bath layer, the insulation layer or the blowout prevention bath layer, the copper tape is not wound thereon, the flame retardance and the water resistance of the cable are affected, and therefore, in order to solve the problem of poor flame retardance, according to the application, the ceramic silicon rubber is extruded on the conductor to form the insulating layer, and the composite structure of the ceramic silicon rubber tape and the copper strip overlapped and wrapped is arranged on the first layer of wrapping tape to form the blowout prevention shower layer, so that the flame retardance and the water resistance of the cable can be improved. When the ceramic silica gel and the ceramic silica gel tape are ignited and burnt, a layer of hard insulating shell is formed, mutual conduction between wire cores is avoided, water is prevented from penetrating into the cable core, and the copper belt can block water outside the cable core to the greatest extent when the copper belt plays a shielding role. In conclusion, the flame-retardant fire-resistant spraying-proof special measurement cable for the fourth-generation nuclear power has a strong flame-retardant effect and a waterproof effect.
Preparation examples 6 to 9
Preparation example 6
The difference between this preparation and preparation 4 is that the total weight of flame retardant and sodium ditridecyl sulfosuccinate modified ramie fiber in this preparation is 40.5 parts. Wherein, the weight ratio of the flame retardant to the sodium ditridecyl sulfosuccinate modified ramie fiber is 1:1.20.
Preparation example 7
The difference between this preparation and preparation 4 is that the total weight of flame retardant and sodium ditridecyl sulfosuccinate modified ramie fiber in this preparation is 40.5 parts. Wherein, the weight ratio of the flame retardant to the sodium ditridecyl sulfosuccinate modified ramie fiber is 1:1.23.
Preparation example 8
The difference between this preparation and preparation 4 is that the total weight of flame retardant and sodium ditridecyl sulfosuccinate modified ramie fiber in this preparation is 40.5 parts. Wherein, the weight ratio of the flame retardant to the sodium ditridecyl sulfosuccinate modified ramie fiber is 1:1.27.
Preparation example 9
The difference between this preparation and preparation 4 is that the total weight of flame retardant and sodium ditridecyl sulfosuccinate modified ramie fiber in this preparation is 40.5. Wherein, the weight ratio of the flame retardant to the sodium ditridecyl sulfosuccinate modified ramie fiber is 1:1.30.
Examples 6 to 9
Examples 6 to 9 differ from example 4 in that the sheath layer uses a different sheath material, see Table 4 for the differences.
Tables 4-part of the differences between examples 6 to 9 and example 4 are shown in the table
The results of the experimental tests of examples 6 to 9 are shown in Table 5.
Table 5-examples 6 to 9 Experimental results are shown in Table
| Options | Flame retardant effect | Dielectric constant change rate (%) (14 d) | Volume resistivity at 20 ℃ of 10 11 omega. CM |
| Example 4 | A | 0.35 | 7.4 |
| Example 6 | A | 0.43 | 6.9 |
| Example 7 | A | 0.37 | 7.3 |
| Example 8 | A | 0.25 | 7.7 |
| Example 9 | A | 0.30 | 7.6 |
Analysis of results: examples 6 to 9 are different from example 4 in that the ratio of the flame retardant to the ditridecyl sodium sulfosuccinate is changed on the premise that the total weight of the flame retardant and the ditridecyl sodium sulfosuccinate modified ramie fiber is not changed when preparing the sheath material, and the waterproof effect and the resistivity of the sheath material prepared in example 8 are better as shown by combining the experimental detection results of Table 5.
Preparation examples 10 to 14
Preparation example 10
The present preparation example differs from preparation example 8 in the proportion of the components in the flame retardant used in the present preparation example. The total weight of the flame retardant in this preparation example was 17.6 parts; wherein, the weight ratio of the magnesium hydroxide to the aluminum hydroxide to the antimonous oxide is 2.2:2.2:0.5.
PREPARATION EXAMPLE 11
The present preparation example differs from preparation example 8 in the proportion of the components in the flame retardant used in the present preparation example. The total weight of the flame retardant in this preparation example was 17.6 parts; wherein, the weight ratio of the magnesium hydroxide to the aluminum hydroxide to the antimonous oxide is 2.3:2.3:0.5.
Preparation example 12
The present preparation example differs from preparation example 8 in the proportion of the components in the flame retardant used in the present preparation example. The total weight of the flame retardant in this preparation example was 17.6 parts; wherein, the weight ratio of the magnesium hydroxide to the aluminum hydroxide to the antimonous oxide is 2.5:2.5:0.7.
Preparation example 13
The present preparation example differs from preparation example 8 in the proportion of the components in the flame retardant used in the present preparation example. The total weight of the flame retardant in this preparation example was 17.6 parts; wherein, the weight ratio of the magnesium hydroxide to the aluminum hydroxide to the antimonous oxide is 2.7:2.7:0.8.
PREPARATION EXAMPLE 14
The present preparation example differs from preparation example 8 in the proportion of the components in the flame retardant used in the present preparation example. The total weight of the flame retardant in this preparation example was 17.6 parts; wherein, the weight ratio of the magnesium hydroxide to the aluminum hydroxide to the antimonous oxide is 3:3:1.
Examples 10 to 14
Examples 10 to 14 differ from example 8 in that examples 10 to 14 use different sheath materials, the differences being seen in Table 6.
Tables 6-the difference between examples 10 to 14 and example 8 is shown in the table
| Options | Sheath layer |
| Example 8 | Preparation example 8 |
| Example 10 | Preparation example 10 |
| Example 11 | PREPARATION EXAMPLE 11 |
| Example 12 | Preparation example 12 |
| Example 13 | Preparation example 13 |
| Example 14 | PREPARATION EXAMPLE 14 |
The results of the experimental tests of examples 10 to 14 are shown in Table 7.
Table 7-Experimental results of examples 10 to 14 are shown in Table
| Options | Flame retardant effect | Dielectric constant change rate (%) (14 d) | Volume resistivity at 20 ℃ of 10 11 omega. CM |
| Example 8 | A | 0.25 | 7.7 |
| Example 10 | A | 0.23 | 7.8 |
| Example 11 | A | 0.22 | 7.9 |
| Example 12 | A | 0.21 | 8.1 |
| Example 13 | A | 0.19 | 8.5 |
| Example 14 | A | 0.20 | 8.2 |
Analysis of results: examples 10 to 14 are different from example 8 in that the weight ratio of magnesium hydroxide, aluminum hydroxide and antimony trioxide is different in the preparation of the sheath material, and it is found that the weight ratio of magnesium hydroxide, aluminum hydroxide and antimony trioxide affects the waterproof effect and resistivity of the sheath material to some extent in combination with the detection results of table 7, and that the waterproof effect of the sheath material prepared in example 12 is good in combination with the experimental detection results of table 7.
Preparation example 15
The difference between the preparation example and the preparation example 13 is that when the preparation example is used for preparing the sodium ditridecyl sulfosuccinate modified ramie fiber, the weight ratio of the ramie fiber to the sodium hydroxide to the sodium ditridecyl sulfosuccinate to the dopamine hydrochloride to the solvent is 7:2.8:116:0.28:57.
PREPARATION EXAMPLE 16
The difference between the preparation example and the preparation example 13 is that when the preparation example is used for preparing the sodium ditridecyl sulfosuccinate modified ramie fiber, the weight ratio of the ramie fiber to the sodium hydroxide to the sodium ditridecyl sulfosuccinate to the dopamine hydrochloride to the solvent is 8:3:120:0.3:60.
Examples 15 to 16
Examples 15 to 16 differ from example 13 in that the sheath layer used a different sheath material, see Table 8 for differences.
Table 8-Experimental results of examples 15-16 see Table
| Options | Flame retardant effect | Dielectric constant change rate (%) (14 d) | Volume resistivity at 20 ℃ of 10 11 omega. CM |
| Example 13 | A | 0.19 | 8.5 |
| Example 15 | A | 0.13 | 9.6 |
| Example 16 | A | 0.16 | 9.1 |
Analysis of results: examples 15 to 16 are different from example 13 in that the weight parts of the sodium ditridecyl sulfosuccinate modified ramie fibers are different when the sheath material is prepared, and the detection result in table 8 shows that the sheath material prepared in example 15 has better waterproof effect, and the reason is probably that the properties of the ramie fibers can be changed by modifying and adhering the sodium ditridecyl sulfosuccinate to the surfaces of the ramie fibers, so that the ramie fibers have higher hydrophobicity, the modified ramie fibers have stronger waterproof effect in the sheath material, and the penetration of moisture can be effectively blocked, so that the inside of the cable is protected from being corroded by the moisture.
Preparation example 17
The difference between this preparation example and preparation example 15 is that the raw material further comprises 10 parts of light calcium carbonate when the sheath material is prepared. The preparation method of the sheath material in the preparation example comprises the following steps:
the preparation method of the sheath layer material comprises the following steps:
S1, boiling ramie fibers by using a sodium hydroxide aqueous solution, and then mixing the ramie fibers with a solvent to prepare a first mixed material and stirring the first mixed material;
S2, mixing sodium ditridecyl sulfosuccinate and dopamine hydrochloride, adding the first mixture, stirring and polymerizing for 2d at 37 ℃, washing and drying to obtain sodium ditridecyl sulfosuccinate modified ramie fibers;
S3, respectively carrying out high-temperature calcination treatment on diatomite and montmorillonite to obtain pretreated diatomite and pretreated montmorillonite;
s4, dividing aromatic hydrocarbon oil into two parts, and mixing the first part of aromatic hydrocarbon oil with the sodium ditridecyl sulfosuccinate modified ramie fibers to prepare a mixed solution;
S5, sequentially mixing and stirring polypropylene resin, an antioxidant, a flame retardant, a coupling agent, titanium pigment, light calcium carbonate, pretreated diatomite and pretreated montmorillonite in the second aromatic oil, extruding and granulating, spraying the mixed solution prepared in the step S2 on the granulating surface, molding and cutting to prepare the sheath layer material.
PREPARATION EXAMPLE 18
The difference between this preparation and preparation 17 is that the amount of light calcium carbonate used in this preparation was 15 parts.
Preparation example 19
The difference between this preparation and preparation 17 is that the amount of light calcium carbonate used in this preparation was 18 parts.
Preparation example 20
The difference between this preparation and preparation 17 is that the amount of light calcium carbonate used in this preparation was 20 parts.
Examples 17 to 20
Examples 17 to 20 differ from example 15 in the difference in the sheath material used for the sheath layer, see table 9 for the differences.
Table 9-Experimental results of examples 15 to 16 are shown in Table
| Options | Flame retardant effect | Dielectric constant change rate (%) (14 d) | Volume resistivity at 20 ℃ of 10 11 omega. CM |
| Example 15 | A | 0.13 | 9.6 |
| Example 17 | A | 0.10 | 11.2 |
| Example 18 | A | 0.08 | 11.5 |
| Example 19 | A | 0.06 | 12.2 |
| Example 20 | A | 0.07 | 12.0 |
Analysis of results: examples 17 to 20 are different from example 15 in that light calcium carbonate is further included in the preparation of the sheath material, and it is known from the experimental test results of table 9 that if light calcium carbonate is added in the preparation of the sheath material, the waterproof property and the resistivity of the prepared sheath material can be effectively improved, and the reason for this is probably that by adding light calcium carbonate, light calcium carbonate can be filled in small pores in the sheath material, and can provide stronger compactness for the sheath material, thereby further protecting the conductor and the insulation material and preventing moisture and external pollutants from penetrating into the cable.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (9)
1. The utility model provides a fire-retardant fire-resistant special type measurement cable that prevents spraying for fourth generation nuclear power, its characterized in that, the cable includes following structure from inside to outside in proper order: the waterproof and flame-retardant protective sleeve comprises a conductor layer (1), an insulating layer (2), a filling layer (3), a first layer of tape (4), a spray-proof layer (5), a lead wire (6), a shielding layer (7), a second layer of tape (8) and a waterproof and flame-retardant protective sleeve layer (9);
The insulating layer (2) is prepared by extruding insulating materials on a conductor, wherein the insulating materials comprise ceramic silicon rubber; the spraying-proof layer (5) is a ceramic silicon tape and copper strip overlapped wrapping composite structure; the waterproof flame-retardant sheath layer (9) is made of sheath layer materials, and the sheath layer materials comprise the following raw materials in parts by weight: 120-180 parts of polypropylene resin, 0.7-1.3 parts of antioxidant, 12-20 parts of flame retardant, 2-4 parts of coupling agent, 8-15 parts of titanium dioxide, 3-5 parts of aromatic oil, 10-15 parts of diatomite, 20-30 parts of montmorillonite, and 15-25 parts of sodium ditridecyl sulfosuccinate modified ramie fiber.
2. The special flame-retardant fire-resistant spraying-proof measuring cable for the fourth-generation nuclear power, which is disclosed in claim 1, is characterized in that the sheath layer material comprises the following raw materials in parts by weight: 150-180 parts of polypropylene resin, 1-1.3 parts of antioxidant, 15-20 parts of flame retardant, 3-4 parts of coupling agent, 10-15 parts of titanium pigment, 4-5 parts of aromatic oil, 13-15 parts of diatomite, 25-30 parts of montmorillonite, and 18.75-25 parts of sodium ditridecyl sulfosuccinate modified ramie fiber.
3. The special flame-retardant fire-resistant spraying-resistant measurement cable for the fourth-generation nuclear power, according to claim 1, wherein the weight ratio of the flame retardant to the modified ramie fiber is 1: (1.2-1.3).
4. The special flame-retardant and fire-resistant spraying-proof measurement cable for the fourth-generation nuclear power, which is disclosed in claim 1, is characterized in that the flame retardant comprises magnesium hydroxide, aluminum hydroxide and antimony trioxide; wherein, the weight ratio of the magnesium hydroxide to the aluminum hydroxide to the antimonous oxide is (2-3): (2-3): (0.5-1).
5. The special flame-retardant and fire-resistant spraying-proof measuring cable for the fourth-generation nuclear power, which is disclosed in claim 4, is characterized in that the weight ratio of magnesium hydroxide, aluminum hydroxide and antimony trioxide is 2.7:2.7:0.8.
6. The special flame-retardant fire-resistant spraying-proof measurement cable for the fourth-generation nuclear power, which is disclosed in claim 1, is characterized in that the sodium ditridecyl sulfosuccinate modified ramie fiber comprises the following components in percentage by weight (5-8): (1-3): (100-120): (0.2 to 0.3): and (40-60) ramie fibers, sodium hydroxide, sodium ditridecyl sulfosuccinate, dopamine hydrochloride and a solvent.
7. The special flame-retardant fire-resistant spray-proof measurement cable for the fourth-generation nuclear power, which is disclosed in claim 6, is characterized in that the solvent is a mixed solution of Tris-HCl buffer solution and absolute ethyl alcohol, wherein the weight ratio of the Tris-HCl buffer solution to the absolute ethyl alcohol is 1:2.
8. The special flame-retardant fire-resistant spraying-proof measuring cable for the fourth-generation nuclear power, which is disclosed in claim 1, is characterized in that the sheath layer material further comprises 10-20 parts of light calcium carbonate.
9. A method for preparing the flame-retardant fire-resistant spraying-proof special measurement cable for the fourth-generation nuclear power according to any one of claims 2-7, which is characterized in that the preparation method of the sheath layer material comprises the following steps:
s1, boiling ramie fibers by using a sodium hydroxide aqueous solution, and mixing the ramie fibers with a solvent to prepare a first mixed solution;
S2, mixing sodium ditridecyl sulfosuccinate and dopamine hydrochloride, adding the first mixed solution, stirring and polymerizing for 1-2 d at 37 ℃, washing and drying to obtain sodium ditridecyl sulfosuccinate modified ramie fibers;
s3, respectively calcining the diatomite and the montmorillonite to obtain pretreated diatomite and pretreated montmorillonite;
S4, dividing aromatic hydrocarbon oil into two parts, and mixing the first part of aromatic hydrocarbon oil with the sodium ditridecyl sulfosuccinate modified ramie fibers to prepare a second mixed solution;
S5, sequentially adding polypropylene resin, an antioxidant, a flame retardant, a coupling agent, titanium pigment, pretreated diatomite and pretreated montmorillonite into the second aromatic oil, mixing and stirring to obtain a flame retardant mixed solution, spraying the second mixed solution obtained in the step S4 into the flame retardant mixed solution in a mist form for coating treatment, extruding, granulating, forming and cutting to obtain the sheath layer material.
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