CN109320389B - Heat-proof detonating fuse and preparation method thereof - Google Patents
Heat-proof detonating fuse and preparation method thereof Download PDFInfo
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- CN109320389B CN109320389B CN201811002642.XA CN201811002642A CN109320389B CN 109320389 B CN109320389 B CN 109320389B CN 201811002642 A CN201811002642 A CN 201811002642A CN 109320389 B CN109320389 B CN 109320389B
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C5/00—Fuses, e.g. fuse cords
- C06C5/04—Detonating fuses
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Abstract
The invention provides a heat-proof detonating fuse and a preparation method thereof. The heat-proof detonating fuse provided by the invention is mainly used for detonating of satellites, carrier rockets and hypersonic aircrafts, and has a complete structure without leakage after working at 350 ℃/600s or 35.5kW/m2/70 s.
Description
Technical Field
The invention relates to a heat-proof detonating cord and a preparation method thereof, which is a novel heat-proof detonating cord designed for developing the development application research of common restrictive detonating cords and aiming at the application of carrying type thermal environments. Belongs to the technical field of aviation and aerospace fire industry.
Background
The common restrictive detonating fuse has a good use environment which generally does not exceed 100 ℃, the coating layer can ensure the complete structure and no pollution after the fuse works, but the performance of the coating layer can change under the temperature higher than 120 ℃ or a certain heat flow condition, the fuse leaks during use, and the requirement of no pollution is not met.
Along with the expansion of the application range, some carrying models provide the requirement of short-time high temperature resistance, and the detonating fuse can still normally work and has a complete structure under the condition of being subjected to 200 ℃/75s or certain heat flow flushing.
Disclosure of Invention
The technical problem of the invention is solved: the defects of the prior art are overcome, the heat-proof detonating cord and the preparation method thereof are provided, and the self temperature resistance of the detonating cord is improved.
The technical solution of the invention is as follows: a thermal explosion vent, comprising: heat-proof coating, extrusion molding layer, weaving layer and explosive fuse, the weaving layer cladding is at the explosive fuse surface, and the extrusion molding layer cladding is at the weaving layer surface, and the surface on extrusion molding layer is heat-proof coating.
The heat-proof coating is a polyurethane heat-proof coating.
The heat-proof coating is wrapped on the surface of the extrusion layer in a dip-coating mode.
The extrusion layer is made of fluorinated ethylene propylene.
The woven layer is made of fiber yarns, and can be aramid fibers, Kevlar or high-strength polyester yarns.
The number of the weaving layers is more than 7.
The shell material of the detonating cord is silver, explosive which can resist high temperature of more than 270DC is filled in the detonating cord, and the detonating cord can be octogen, hexanitrostilbene or DIPAM explosive.
The preparation method of the thermal explosion-proof fuse is characterized by comprising the following steps of:
s1, coating the fiber yarn, which can be aramid fiber, Kevlar or polyester fiber, on the outer surface of the detonating cord in a weaving mode, wherein the number of the coating layers is more than 7, and the number of weaving ingots is more than 24 to form a weaving layer;
s2, coating the outer surface of the woven detonating cord with fluorinated ethylene propylene in an extrusion molding mode to form an extrusion molding layer, wherein the temperature of the extrusion molding machine is 320-380 ℃, and the extrusion molding thickness is 0.6-1 mm.
S3, dip-coating a polyurethane heat-proof coating on the outer surface of the extruded silver tube detonating fuse, wherein the thickness of each dip-coating is 0.1-0.2 mm, the dip-coating frequency is not less than 10 times, drying treatment is carried out after each dip-coating, and the total thickness is 2-3 mm.
Compared with the prior art, the invention has the advantages that:
(1) according to the invention, by utilizing the material characteristics of the polyurethane heat-proof coating, the polyurethane heat-proof coating expands and foams after being heated under a certain thermal environment condition to form a vacuum zone to isolate hot air, so that the high temperature borne by the detonating cord is reduced;
(2) the invention adopts the extrusion molding material with good impact resistance and high strength weaving material, thus improving the temperature resistance of the detonating fuse;
(3) the invention adopts a special coating structure of weaving first and extruding second, increases the combination degree of the extrusion molding layer and the product, buffers the explosion impact of the explosion fuse on the extrusion molding layer after working, effectively restrains the explosion residue after the explosion fuse works, and realizes no leakage and no pollution.
(4) Silver and explosive with excellent temperature resistance are selected as the detonating fuse material, and the detonating fuse material has high temperature resistance.
(5) Compared with the common restrictive detonating cord, the weight and the volume of the invention are increased slightly, and the invention has simple structure and high reliability.
Drawings
Fig. 1 is a schematic structural view of a novel thermal explosion-proof detonating cord.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the present invention provides a thermal explosion proof detonating cord for the booster of a cruise missile at supersonic speed, a launch vehicle, a satellite. This heat-proof detonating cord includes heat-proof coating 1, extrusion molding layer 2, weaving layer 3 and detonating cord 4, and the 3 cladding of weaving layer is at 4 surfaces of detonating cord, and the 2 cladding of extrusion molding layer is at 3 surfaces of weaving layer, and the surface on extrusion molding layer 2 is heat-proof coating 1.
The heat-proof coating 1 is a polyurethane heat-proof coating and is wrapped on the surface of the extrusion molding layer 2 in a dip-coating mode.
The extrusion molding layer 2 is made of fluorinated ethylene propylene.
The braided layer 3 is made of fiber yarns which can be aramid fibers, Kevlar or high-strength nylon yarns, and the number of braided layers is more than 7.
The shell material of the detonating cord 4 is silver, explosive which can resist high temperature of more than 270DC is filled in the detonating cord 4, and the detonating cord 4 can be octogen, hexanitrostilbene or DIPAM explosive.
The working principle of the invention is as follows: when the outside is in a specific high-temperature short-time or heat-flow thermal environment condition, the polyurethane heat-proof coating on the outermost layer is heated and expanded to form a vacuum zone to isolate hot air, so that the temperature born by the detonating fuse is reduced; meanwhile, the woven and extruded coating layer can also bear a certain thermal environment, and residues generated after the silver tube detonating fuse works are wrapped inside the product, so that leakage and pollution are avoided.
The invention also provides a preparation method of the thermal explosion-proof fuse, which comprises the following steps:
s1, coating the fiber yarn on the outer surface of the detonating cord 4 in a weaving mode, wherein the fiber yarn can be aramid fiber, Kevlar or high-strength polyester yarn, the number of coating layers is more than 7, and the number of weaving ingots is 24 to form a weaving layer;
s2, coating the outer surface of the woven detonating cord 4 with fluorinated ethylene propylene in an extrusion molding mode to form an extrusion molding layer, wherein the temperature of the extrusion molding machine is 320-380 ℃, and the extrusion thickness is 0.6-1 mm.
s3, dip-coating the outer surface of the extruded silver tube detonating cord 4 with a polyurethane heat-proof coating, wherein the thickness of each dip-coating is 0.1-0.2 mm, the dip-coating frequency is not less than 10 times, drying treatment is carried out after each dip-coating, and the total thickness is 2-3 mm.
The following describes the preparation method and technical effects of the above thermal explosion proof fuse in three embodiments.
Example 1
s1, coating the fiber yarn which can be aramid fiber, Kevlar or high-strength polyester yarn on the outer surface of the detonating cord in a weaving mode, wherein the number of the coating layers is 7, and the number of weaving spindles is 24 to form a weaving layer;
s2, coating the outer surface of the braided detonating cord 4 with fluorinated ethylene propylene in an extrusion mode to form an extrusion layer, wherein the temperature of the extruder is 320 ℃, and the extrusion thickness is 0.6.
s3, dip-coating the outer surface of the extruded silver tube detonating cord 4 with a polyurethane heat-proof coating, wherein the thickness of each dip-coating is 0.1mm, the dip-coating times are 30 times, after each dip-coating, the drying treatment is carried out at 130 ℃/1h, and the total thickness is 3 mm.
Tests prove that the heat-proof detonating cord prepared by the method is 350 ℃/650s or 35.5kW/m2The structure is complete and has no leakage after the operation of 70 s.
Example 2
s1, coating the fiber yarn which can be aramid fiber, Kevlar or high-strength polyester yarn on the outer surface of the detonating cord 4 in a weaving mode, wherein the number of the coating layers is 9, and the number of weaving spindles is 32 to form a weaving layer;
s2, coating the outer surface of the braided detonating cord 4 with fluorinated ethylene propylene in an extrusion mode to form an extrusion layer, wherein the temperature of the extruder is 380 ℃, and the extrusion thickness is 1 mm.
s3, dip-coating the outer surface of the extruded silver tube detonating cord 4 with a polyurethane heat-proof coating, wherein the thickness of each dip-coating is 0.15mm, the dip-coating frequency is 20 times, after each dip-coating, the drying treatment is carried out at 132 ℃/1h, and the total thickness is 3 mm.
Tests prove that the heat-proof detonating cord prepared by the method is 370 ℃/600s or 35.5kW/m2The structure is complete and has no leakage after the operation of 70 s.
Example 3
s1, coating the fiber yarn which can be aramid fiber, Kevlar or high-strength polyester yarn on the outer surface of the detonating cord 4 in a weaving mode, wherein the number of the coating layers is 11, and the number of weaving spindles is 32 to form a weaving layer;
s2, coating the outer surface of the braided detonating cord 4 with fluorinated ethylene propylene in an extrusion mode to form an extrusion layer, wherein the temperature of the extruder is 350 ℃, and the extrusion thickness is 0.8 mm.
s3, dip-coating the outer surface of the extruded silver tube detonating cord 4 with a polyurethane heat-proof coating, wherein the thickness of each dip-coating is 0.2mm, the dip-coating frequency is 10 times, after each dip-coating, drying treatment is carried out at a speed of 128 ℃/1h, and the total thickness is 2 mm.
Tests prove that the heat-proof detonating cord prepared by the method is 380 ℃/650s or 42kW/m2The structure is complete and has no leakage after the operation of 70 s.
The thermal explosion-proof fuse provided by the invention meets the use requirements of carrying models, satellites and hypersonic speed aircrafts under thermal environment conditions, and further expands the application market of an electroless explosion-proof system. Has wide application prospect aiming at models with thermal environment requirements.
The invention has not been described in detail in part of the common general knowledge of those skilled in the art.
Claims (8)
1. A thermal fuse, comprising: the thermal insulation coating comprises a thermal insulation coating (1), an extrusion molding layer (2), a woven layer (3) and an explosion wire (4), wherein the woven layer (3) is coated on the outer surface of the explosion wire (4), the extrusion molding layer (2) is coated on the outer surface of the woven layer (3), the outer surface of the extrusion molding layer (2) is the thermal insulation coating (1), and the thermal insulation coating (1) is a polyurethane thermal insulation coating;
the heat-proof coating (1) is wrapped on the surface of the extrusion layer (2) in a dip-coating mode;
the extrusion molding layer (2) is made of fluorinated ethylene propylene.
2. A thermal explosion vent according to claim 1, wherein: the material of the woven layer (3) is fiber yarn.
3. A thermal explosion vent according to claim 2, wherein: the fiber yarn comprises aramid fiber, Kevlar or polyester yarn.
4. A thermal explosion vent according to claim 1, wherein: the number of the weaving layers of the weaving layer (3) is more than 7.
5. A thermal explosion vent according to claim 1, wherein: the shell material of the detonating cord (4) is silver, and the explosive which can resist the high temperature of more than 270 ℃ is filled in the detonating cord.
6. A thermal explosion vent according to claim 5, wherein: the explosive is octogen, hexanitrostilbene or DIPAM explosive.
7. A thermal explosion proof detonating cord according to claim 1 characterized by being used for booster of launcher, satellite, supersonic cruise missile.
8. The preparation method of the thermal explosion-proof fuse is characterized by comprising the following steps of:
s1, coating the fiber yarn which can be aramid fiber, Kevlar or polyester yarn on the outer surface of the detonating cord (4) in a weaving mode, wherein the number of the coating layers is more than 7, and the number of the weaving ingots is more than 24 to form a weaving layer;
s2, coating the outer surface of the woven detonating cord (4) with fluorinated ethylene propylene in an extrusion molding mode to form an extrusion molding layer, wherein the temperature of an extruding machine is 320-380 ℃, and the extrusion thickness is 0.6-1 mm;
s3, dip-coating the outer surface of the extruded silver tube detonating cord (4) with a polyurethane heat-proof coating, wherein the thickness of each dip-coating is 0.1-0.2 mm, the dip-coating frequency is not less than 10 times, drying treatment is carried out after each dip-coating, and the total thickness is 2-3 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811002642.XA CN109320389B (en) | 2018-08-30 | 2018-08-30 | Heat-proof detonating fuse and preparation method thereof |
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| CN201811002642.XA CN109320389B (en) | 2018-08-30 | 2018-08-30 | Heat-proof detonating fuse and preparation method thereof |
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| CN109320389A CN109320389A (en) | 2019-02-12 |
| CN109320389B true CN109320389B (en) | 2021-02-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111207640A (en) * | 2020-03-30 | 2020-05-29 | 南阳市神威***工程有限公司 | Ultra-deep hole blasting method |
| CN112266181B (en) * | 2020-11-17 | 2022-08-02 | 衡阳凌云特种材料有限公司 | Heat-proof/insulation composite material and preparation method and application thereof |
| CN112300561A (en) * | 2020-11-17 | 2021-02-02 | 衡阳凌云特种材料有限公司 | Composite hose for limiting detonating cord and preparation method thereof |
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| AUPM305393A0 (en) * | 1993-12-20 | 1994-01-20 | Initiating Explosives Systems Proprietary Limited | Signal tube of improved oil resistance |
| CN1053652C (en) * | 1994-12-07 | 2000-06-21 | 长沙矿山研究院 | Inductive explosion non-directional industrial explosion-guiding cable |
| CN2219298Y (en) * | 1995-03-14 | 1996-02-07 | 冶金工业部长沙矿冶研究院 | Plastic blasting fuse |
| CN2341988Y (en) * | 1998-04-01 | 1999-10-06 | 长沙矿山研究院 | Composite sandwich type high-strength detonating tube |
| DE102006007483B4 (en) * | 2006-02-17 | 2010-02-11 | Atc Establishment | shock tube |
| CN200967791Y (en) * | 2006-10-26 | 2007-10-31 | 陕西省军工(集团)秦东化工有限责任公司 | Coal mine safety blasting cord |
| CN200972373Y (en) * | 2006-11-29 | 2007-11-07 | 山东银光科技有限公司 | Composite high strength plastic detonating tube |
| EP2340284B1 (en) * | 2008-09-22 | 2014-04-16 | SABIC Innovative Plastics IP B.V. | Poly(arylene ether) composition and a covered conductor with flexible covering wall and large size conductor |
| CN201770626U (en) * | 2010-07-02 | 2011-03-23 | 高要市南虹化工有限公司 | All-plastic covered primacord |
| CN102060638A (en) * | 2010-11-15 | 2011-05-18 | 云南燃二化工有限公司 | Winding type low-shrinking-percentage detonating cord for oil and gas wells |
| CN103772079A (en) * | 2014-01-13 | 2014-05-07 | 云南燃二化工有限公司 | Permissible detonating cord for coal mine, and cord maker thereof |
| CN203931556U (en) * | 2014-03-11 | 2014-11-05 | 芜湖航天特种电缆厂 | A kind of fire-resistant control flexible cable |
| CN104829402B (en) * | 2015-05-13 | 2017-11-17 | 湖北帅力化工有限公司 | A kind of common cotton thread primacord of environment-friendly type |
| CN204988034U (en) * | 2015-08-18 | 2016-01-20 | 北方***科技有限公司 | Big pulling force explosive fuse |
| CN107345782A (en) * | 2017-05-19 | 2017-11-14 | 湖北帅力化工有限公司 | A kind of cotton thread mixes the cotton modeling primacord of establishment with plastic cord |
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