CN111089519A - Flexible explosion-proof top cover of explosion-proof barrel - Google Patents
Flexible explosion-proof top cover of explosion-proof barrel Download PDFInfo
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- CN111089519A CN111089519A CN202010058682.7A CN202010058682A CN111089519A CN 111089519 A CN111089519 A CN 111089519A CN 202010058682 A CN202010058682 A CN 202010058682A CN 111089519 A CN111089519 A CN 111089519A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D5/00—Safety arrangements
- F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D5/00—Safety arrangements
- F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless
- F42D5/045—Detonation-wave absorbing or damping means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a flexible anti-explosion top cover of an anti-explosion barrel. The invention can greatly improve the shock wave prevention and fire extinguishing capability of the explosion-proof barrel. According to the invention, the liquid layer is arranged in the explosion-proof top cover, so that shock waves generated by explosion can be converted into kinetic energy of the liquid to absorb the shock waves; simultaneously, set up the through-hole on the inside lining for liquid and shock wave contact completely, the liquid layer atomizes under the shock wave effect and throws, reaches and can put out a fire, can absorb the effect of shock wave energy again simultaneously. The explosion-proof top cover is made of flexible composite materials, does not contain metal and hard materials, and does not cause secondary damage to a human body.
Description
Technical Field
The invention relates to the technical field of explosion-proof devices, in particular to a flexible explosion-proof top cover of an explosion-proof barrel.
Background
Explosion mainly creates three hazards: fragments, shock waves and high temperature flames. The common disposal for explosives is to place the explosive in an explosion-proof tank for detonation.
The common explosion-proof barrel is mainly divided into two types, one type is an explosion-proof barrel with an open top, the barrel body and the barrel bottom are made of steel structures and are firmly connected, and the top cover is made of foam materials or light cloth; the explosion hazard generated by explosives is blocked mainly by the strength of the barrel body and the barrel bottom, and the top cover mainly plays a role in shielding and upwards relieving pressure. However, in the explosion moment of the explosive, due to the high strength of the barrel body, the shock waves and detonation products cannot be transmitted from the circumferential direction, so that the shock waves and the detonation products are gathered and transmitted upwards, the top cover is ejected out, and then the shock waves and the detonation products are diffracted and transmitted to the periphery. Meanwhile, the fireball generated by explosion also spreads to the periphery through the top. The existing adopted top cover does not have the effect of preventing shock waves. The explosion-proof barrel has certain advantages on the protective fragments, and has the defects that the explosion-proof barrel does not have a protective effect on shock waves and high-temperature flames generated by explosion, and meanwhile, the distance above the top cover of the explosion-proof barrel has certain requirements, because explosion products and the shock waves are gathered upwards, the explosion-proof barrel is easy to cause more serious damage to buildings above, and can be used in the open air or with the distance above more than 6 m.
The second kind is closed explosion-proof bucket, and the staving, the barrel head and the top cap of explosion-proof bucket all adopt the steel, and the top cap passes through screw thread, bolt or certain fixed mode and firmly fixes on explosion-proof bucket, and it has the pressure release aperture of certain size to open on the top cap, and the diameter in its hole is about 10mm generally, in the twinkling of an eye of the explosion, because whole staving top cap and barrel head high strength's connection become a whole, and pressure is let out by the pressure release aperture on the top cap. The explosion-proof barrel has the advantages that the explosion-proof barrel has certain protection effect on fragments, shock waves and high-temperature flame, but because the pressure of explosion products and explosives generated by explosion is huge, when the equivalent of the explosives exceeds the equivalent of the explosion-proof barrel or the explosion-proof barrel is not firmly connected, the explosion shock waves easily break the joint of the top cover and the barrel body to cause secondary killing.
In view of the current explosion-proof technology, the design of the top cover of the explosion-proof barrel is not specially designed, and the top cover of the explosion-proof barrel is used as an important component of the explosion-proof barrel and plays an important role in protecting shock waves and explosion high-temperature flames.
Disclosure of Invention
In view of the above, the invention provides a flexible explosion-proof top cover of an explosion-proof barrel, which has certain supporting strength, completely adopts flexible composite materials and liquid, does not contain metal and hard materials, does not cause secondary damage to a human body, and can greatly improve the shock wave prevention and fire extinguishing capabilities of the explosion-proof barrel.
The flexible anti-explosion top cover of the anti-explosion barrel comprises a lining A, an outer ring, a lining B and a liquid layer; the size of the outer ring is matched with the caliber of the explosion-proof barrel, and the lining A and the lining B are respectively fixed at the upper end and the lower end of the outer ring; a liquid layer sandwiched between liner a and liner B; the skin wraps the outer surfaces of the lining A and the lining B, and liquid is filled in the liquid layer.
Preferably, the lining A, the lining B and the outer ring are made of polyurethane foam or other light energy-absorbing non-metallic materials.
Preferably, the surfaces of the lining A, the lining B and the outer ring are sprayed with polyurea or polyurethane elastomers with the thickness of 1-3 mm.
Preferably, the lining A and the lining B are provided with through holes.
Preferably, the area of the through holes is 20% -50% of the area of the lining, and the through holes are uniformly distributed.
Preferably, support pipes are embedded in the lining A and the lining B.
Preferably, the support tube is made of carbon fiber or other non-metallic lightweight high-strength materials.
Preferably, the liquid in the liquid layer is mainly formed by mixing water, antifreeze, foam extinguishing agent and superfine silicon dioxide powder; wherein, the mass percent of the foam extinguishing agent is 10-15%, the mass percent of the antifreeze is 10-20%, and the mass percent of the superfine silicon dioxide powder is 2-5%.
Preferably, the skin adopts single-layer cloth or oilpaper structure, and is adhered to the outer surface of the lining in a gluing mode.
Has the advantages that:
according to the invention, the liquid layer is arranged in the explosion-proof top cover, so that shock waves generated by explosion can be converted into kinetic energy of the liquid to absorb the shock waves; simultaneously, set up the through-hole on the inside lining for liquid and shock wave contact completely, the liquid layer atomizes under the shock wave effect and throws, reaches and can put out a fire, can absorb the effect of shock wave energy again simultaneously. The explosion-proof top cover is made of flexible composite materials, does not contain metal and hard materials, and does not cause secondary damage to a human body.
Drawings
Fig. 1 is a schematic structural diagram of an explosion-proof barrel top cover.
Fig. 2 is a schematic sectional structure view of the top cover of the explosion-proof barrel.
Fig. 3 is a schematic view of a support tube.
FIG. 4 is a diagram showing the performance test layout of the top cover of the explosion-proof barrel
Fig. 5 shows the situation of the variation of the peak value of the shock wave overpressure at the test point a (3.5 m from the center of the explosion and 0.3m from the ground) in the scheme of the invention of the flexible explosion-proof top cover without opening the hole and the scheme of the invention of the flexible explosion-proof top cover with the hole.
Fig. 6 shows the situation of the variation of the peak value of the shock wave overpressure at the test point B (2.5 m from the center of the explosion and 1.5m from the ground) in the scheme of the invention of the flexible explosion-proof top cover without opening the hole and in the scheme of the invention of the flexible explosion-proof top cover opening the hole.
Wherein, 1.1-lining A, 1.2-covering, 1.3-outer ring, 1.4-lining A, 1.5-liquid layer, 1.6-supporting tube; 1-explosion-proof bucket top cap, 2-explosion-proof bucket staving, 3-500 g explosive, 4-air space, 5-test point A (apart from bucket center 3.5m, apart from ground 0.3m department), 6-test point B (apart from bucket center 2.5m, apart from ground 1.5 m).
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention provides a flexible anti-explosion top cover of an anti-explosion barrel, which comprises a lining A1.1, an outer ring 1.3, a lining B1.4, a liquid layer 1.5 and a skin 1.2 as shown in figures 1-3.
The inner liner A1.1, the inner liner B1.4 and the outer ring 1.3 form the outer contour of the explosion-proof top cover and play a supporting role; the size of the outer ring is matched with the caliber of the explosion-proof barrel, and the lining A1.1 and the lining B1.4 are respectively fixed at the upper end and the lower end of the outer ring 1.3; the liquid layer 1.5 is sandwiched between liner a 1.1 and liner B1.4; the skin 1.2 wraps the outer surfaces of the lining A1.1 and the lining B1.4 and is used for surface packaging and flattening.
Wherein the outer ring 1.3 is made of polyurethane foam; the surface can be sprayed with polyurea or polyurethane elastomer, and the thickness of the sprayed layer is 1-3 mm. The polyurethane foam has a density of 50 to 300kg/m3After polyurea is sprayed on the surface, the structure can be ensured to have certain elasticity and strength, the density is low, and the weight of the whole supporting structure is reduced. Meanwhile, under the action of explosive shock waves, polyurethane foam is broken to absorb a large amount of shock wave energy. The thickness of the outer ring is about 8-15 mm. In order to improve the structural strength of the outer ring, polyurea or polyurethane elastomer is sprayed on the inner surface and the outer surface of the outer ring, so that the whole structure is elastic, is not easy to break under conventional use conditions, has certain rigidity, and simultaneously improves the aging resistance and corrosion resistance of the structure.
The lining A1.1 and the lining B1.4 are made of polyurethane foam, and the thickness is 8-15 mm; the polyurethane foam has a density of 50 to 300kg/m3(ii) a Spraying polyurea or other elastomer on the surface, wherein the thickness of the spraying layer is 1-3 mm.
For further improving the energy absorption effect of the liquid layer, through holes can be formed in the lining A1.1 and the lining B1.4, so that the explosion shock waves have certain contact area with the liquid layer through the through holes, and further the kinetic energy of the explosion shock waves can be rapidly converted into the kinetic energy of the top cover and the kinetic energy of the liquid in the top cover liquid layer, and the purpose of rapidly absorbing the energy of the explosion shock waves is achieved. Meanwhile, the holes can also enable liquid to be atomized and thrown under the action of shock waves, so that the effects of extinguishing fire and absorbing shock wave energy are achieved. Wherein, preferably, the through holes on the lining A1.1 and the lining B1.4 are symmetrical, and are preferably slotted holes; the area of the through holes is 20% -50% of the area of the lining, and the through holes on a single lining are preferably in a plurality of symmetrical modes, as shown in figure 1.
In order to further improve the structural strength of the lining, a supporting tube 1.6 can be embedded in the lining; as shown in fig. 2 to fig. 3, the support tube 1.6 is embedded in the liner a 1.1 and the liner B1.4, and the support tube 1.6 is made of a carbon fiber tube or other high-strength high-modulus fiber composite material (with elasticity greater than 70GPa and tensile strength greater than 300MPa) for improving the rigidity of the top cover and supporting the whole structure.
The liquid in the liquid layer 1.5 is mainly formed by mixing water, antifreeze, foam extinguishing agent and superfine silicon dioxide powder. The weight percentage is as follows: 10-15% of foam extinguishing agent, 10-20% of antifreeze, 2-5% of superfine silicon dioxide powder and 65-73% of water, and after the other contents are determined, the content of the water is adjusted to be matched. The foam extinguishing agent is used for increasing the fire extinguishing function of the top cover, the antifreezing solution can be used in a low-temperature environment, the superfine silicon dioxide powder is used for increasing the friction force between liquids in the explosion action process, and the superfine silicon dioxide powder can be used as the condensation nucleus of water mist to increase the action volume between the liquid water mist. The liquid layer has the action principle that after impact waves generated by explosion impact the top cover, the liquid layer inside is accelerated. Make the liquid layer obtain kinetic energy to convert shock wave energy into the kinetic energy of liquid, the effect of trompil makes liquid and shock wave contact completely, and the liquid layer atomizes under the shock wave effect and spills, reaches and can put out a fire, can absorb the effect of shock wave energy again simultaneously. The liquid layer is packaged by a plastic water bag.
The skin 1.2 can be made of single-layer cloth or oiled paper, the size of the skin can be determined according to the size of the openings in the lining 1 and the lining 2, and the skin is glued on the outer surfaces of the lining A1.1 and the lining B1.4. The skin can guarantee that the structure is level and smooth, reduces the light that enters into the water bag simultaneously, reduces ageing, extension product life.
The manufacturing process of the explosion-proof top cover comprises the following steps:
s1, carrying out hot pressing on the lining A1.1 and the lining B1.4 and a carbon fiber tube 1.6 into a whole by using a mould, wherein the carbon fiber tube is arranged at the middle layer position of the lining A1.1 and the lining B1.4;
s2, spraying polyurea on the outer surfaces of the lining A1.1, the lining B1.4 and the outer ring 1.3 to ensure that the spraying surfaces are smooth;
s3, grooving the lining A1.1 and the lining B1.4;
s4, gluing the bottom ends of the lining B1.4 and the outer ring 1.4, and standing until the bottom ends are completely and firmly connected;
s5, filling the liquid into a plastic water bag and placing it in the half-open structure formed in the step S4;
and S6, gluing the lining A1.1 and the upper end of the outer ring 1.4, so that the lining A1.1, the lining B1.4, the outer ring 1.3 and the liquid layer 1.5 form an integral structure.
And S7, packaging the skin at the opening, wherein the size and the shape of the skin are determined according to the shape of the opening.
S8, standing and then sleeving an outer package.
The following is an analysis with reference to a specific example. The explosion-proof barrel is made of steel with the outer diameter of 500mm, the inner diameter of 460mm and the height of 800 mm. The liners A1.1 and B1.4 have a diameter of 500mm, a thickness of 10mm and a bulk density of 150kg/cm3The polyurethane foam material is extruded and molded, and polyurea with the thickness of 2mm is sprayed on the surface. The outer ring 1.3 has an outer diameter of 500mm, an inner diameter of 480mm, a thickness of 10mm, and a bulk density of 150kg/cm3The polyurethane foam material is extruded and molded, and polyurea with the thickness of 2mm is sprayed on the surface. The liquid in the liquid layer 1.5 is a mixed liquid of antifreeze, fire extinguishing agent, superfine silicon dioxide powder and water, wherein the mass percentage of the water, the antifreeze, the foam extinguishing agent and the superfine silicon dioxide powder is 70:15:12: 3. And filling the liquid into water bags with corresponding sizes, and placing the water bags in the lining. The lining A1.1 and the lining B1.4 are symmetrically provided with 3 slotted holes, and the area of the slotted holes accounts for 30 percent of the surface area of the lining. The supporting tube 1.6 is made of carbon fiber tubes, the outer diameter of the supporting tube 1.6 is 5mm, the wall thickness of the supporting tube is 1mm, and the supporting tube is respectively embedded between the lining A1.1 and the lining B1.4. The number of carbon fiber tubes in the lining A1.1 is 5, and the distance between the carbon fiber tubes is 80 mm.
And carrying out simulation test on the explosion-proof effect of the explosion-proof top cover. The test layout is as shown in fig. 4, 500g of explosive is placed in an explosion-proof barrel, an explosion-proof top cover of the embodiment is covered on the explosion-proof barrel, the shock wave overpressure at a test point A (3.5 m away from the center of the explosion-proof barrel and 0.3m away from the ground) and a test point B (2.5 m away from the center of the explosion-proof barrel and 1.5m away from the ground) in an air area is calculated in a simulation mode, the effect of no top cover and the top cover of the invention but no hole on the top cover is compared, and the result is as shown in fig. 5-6. As can be seen from FIG. 5, the shock wave overpressure at test point A without the top cover is 34.7 kPa; by adopting the flexible explosion-proof barrel top cover provided by the invention, the shock wave overpressure at the position is 31.2kPa under the condition that the top cover is not provided with the hole, and the shock wave overpressure at the position is 29.5kPa under the condition that the top cover is provided with the hole. The peak value of the differential pressure of the shock wave born by the human body is 30kPa, and the top cover of the explosion-proof barrel can effectively weaken the shock wave.
At test point B, the shock wave overpressure was 68.5kPa without the cover, 49.3kPa with the flexible explosion proof cover of the invention (not apertured) and 38.8kPa with the aperture. Although the pressure difference is still larger than the maximum shock wave differential pressure which can be borne by a human body, the overpressure of the shock wave is effectively reduced compared with that without a top cover.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A flexible explosion-proof top cover of an explosion-proof barrel is characterized by comprising a lining A (1.1), an outer ring (1.3), a lining B (1.4) and a liquid layer (1.5); the size of the outer ring (1.3) is matched with the caliber of the explosion-proof barrel, and the lining A (1.1) and the lining B (1.4) are respectively fixed at the upper end and the lower end of the outer ring (1.3); a liquid layer (1.5) sandwiched between liner a (1.1) and liner B (1.4); the skin (1.2) is wrapped on the outer surfaces of the lining A (1.1) and the lining B (1.4), and liquid is filled in the liquid layer.
2. The flexible explosion-proof roof cover of an explosion-proof tank as claimed in claim 1, characterized in that the lining a (1.1), the lining B (1.4) and the outer ring (1.3) are made of polyurethane foam or other lightweight energy-absorbing non-metallic materials.
3. The flexible explosion-proof top cover of the explosion-proof barrel according to claim 1 or 2, wherein the surfaces of the lining A (1.1), the lining B (1.4) and the outer ring (1.3) are coated with polyurea or polyurethane elastomer with the thickness of 1-3 mm.
4. The flexible explosion proof top cover of an explosion proof barrel according to claim 1 wherein the liner A (1.1) and the liner B (1.4) are provided with through holes.
5. An explosion proof flexible cover as defined in claim 4, wherein said through holes are uniformly arranged with an area of 20% to 50% of the area of the liner.
6. The flexible explosion-proof top cover of an explosion-proof barrel according to claim 1, characterized in that support tubes (1.6) are embedded in the lining A (1.1) and the lining B (1.4).
7. Flexible explosion-proof cover for explosion-proof barrels according to claim 6, characterised in that the support tube (1.6) is made of carbon fibre or other non-metallic lightweight high-strength material.
8. The flexible explosion-proof top cover of an explosion-proof barrel according to claim 1, wherein the liquid in the liquid layer is mainly formed by mixing water, antifreeze, foam extinguishing agent and superfine silicon dioxide powder; wherein, the mass percent of the foam extinguishing agent is 10-15%, the mass percent of the antifreeze is 10-20%, and the mass percent of the superfine silicon dioxide powder is 2-5%.
9. The flexible explosion-proof top cover of an explosion-proof barrel according to claim 1, characterized in that the covering (1.2) is made of single-layer cloth or oil paper and is adhered to the outer surface of the lining in a gluing mode.
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| CN202010058682.7A CN111089519A (en) | 2020-01-19 | 2020-01-19 | Flexible explosion-proof top cover of explosion-proof barrel |
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| CN202010058682.7A CN111089519A (en) | 2020-01-19 | 2020-01-19 | Flexible explosion-proof top cover of explosion-proof barrel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113211819A (en) * | 2021-03-31 | 2021-08-06 | 湖南艾尔防务技术有限公司 | Composite explosion-proof barrel and fiber composite curved surface member forming method |
| CN116753499A (en) * | 2023-08-17 | 2023-09-15 | 山东智信光电有限公司 | Explosion-proof LED lighting device for coal mine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113211819A (en) * | 2021-03-31 | 2021-08-06 | 湖南艾尔防务技术有限公司 | Composite explosion-proof barrel and fiber composite curved surface member forming method |
| CN116753499A (en) * | 2023-08-17 | 2023-09-15 | 山东智信光电有限公司 | Explosion-proof LED lighting device for coal mine |
| CN116753499B (en) * | 2023-08-17 | 2023-10-24 | 山东智信光电有限公司 | Explosion-proof LED lighting device for coal mine |
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