CN110645863A - Novel explosion-proof blanket composite fence structure - Google Patents

Abstract

The invention discloses a novel explosion-proof blanket composite fence structure. The invention can improve the performance of the anti-shrapnel, can effectively prevent the shock waves and fragment damages generated by 2 grenades, and can effectively prevent fire and extinguish fire. The inner fence and the outer fence are integrated into a whole through the inner connecting layer and the outer connecting layer, so that impact waves generated by explosion and reflected waves of the impact waves can be effectively prevented from impacting the inner fence, the jumping of the fence is prevented, secondary loading of ground reflected waves on broken pieces is prevented, and the capacity of the integral explosion-proof blanket and bulletproof piece is enhanced. In addition, the structures of the inner and outer peripheral columns are improved. The inner fence comprises 5 layers, and the material is prevented from losing efficacy under the conditions of explosion and high temperature through the flame-retardant layer and the heat-insulating layer; the flame-retardant and explosion-proof liquid layer is used for absorbing shock wave energy generated by explosion, reducing shock wave pressure and extinguishing fire; the supporting layer, the flame-retardant and explosion-proof liquid layer and the elastic sheet protective layer decelerate and intercept the broken pieces, so that the explosion-proof capacity of the fence is effectively improved.

Description

A new type of explosion-proof blanket composite fence structure

technical field

The invention relates to the technical field of safety protection devices, in particular to a novel explosion-proof blanket composite fence structure.

Background technique

Explosion-proof blanket is a kind of protective equipment used for temporary storage and disposal of explosives. It consists of inner fence, outer fence and blanket. The traditional inner and outer fences are generally made of a single aramid material by pressing epoxy resin. Due to the poor environmental adaptability of epoxy resin and aramid material, using this structure for a long time will cause the rigidity of the structure to decrease, making the structure It collapses easily and cannot maintain its original shape. At present, PE material is generally used for lamination, and some supporting structures are added inside to ensure that its shape and structure remain unchanged. Relatively speaking, the density of PE material is lighter than that of aramid. The density of PE material is 0.97g/cm ³ , and the density of aramid fiber is 1.4-1.5g/cm ³ . PE per unit mass has stronger bulletproof advantages than aramid. However, since the melting point of aramid is about 500 degrees Celsius and the melting point of PE is 120 degrees Celsius, some PE or aramid materials may be directly ignited at the moment of explosion, resulting in a decrease in the explosion-proof effect and even a direct fire.

At the same time, for the existing explosion-proof blanket, an inner fence is used to cover the suspicious explosives, then an outer fence is used to cover the inner fence, and finally a blanket is covered to isolate the suspicious explosives from the outside world. The current explosion-proof blanket only considers the effect of the bulletproof sheet (fragment), and the protection effect is general, generally only one grenade can be protected, and the shock wave cannot be effectively protected. However, when an explosive explodes, it will generate shock waves and fragments at the same time. During the explosion, the shock wave is overpressured, which may cause shock wave damage to surrounding personnel. And the shock wave is larger, and the reflected wave on the ground will also become larger, which makes the fence easy to jump up, causing fragments to fly out from the bottom of the fence, affecting the explosion-proof effect of the explosion-proof blanket.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a new type of explosion-proof blanket composite fence structure, which can improve the performance of anti-shrapnel, can effectively prevent the shock wave and fragment damage caused by the explosion of two grenades, and can effectively carry out fire prevention and fire fighting.

The novel explosion-proof blanket composite fence structure of the present invention includes an inner fence, an outer fence and an inner and outer connecting piece; wherein one end of the inner and outer connecting piece is fixed at the bottom of the inner fence, and the other end is fixed at the top of the outer fence.

Preferably, the inner and outer connecting layers are made of bulletproof material.

Preferably, the inner and outer connecting layers are made of aramid or PE.

Preferably, the inner and outer connecting layers are fixed on the inner and outer fences by sewing or by velcro.

Preferably, the inner fence is sequentially composed of a flame retardant layer, a heat insulation layer, a support layer, a flame retardant and explosion-proof liquid layer and a shrapnel protective layer from the inside to the outside; wherein, the flame retardant layer is used to prevent the flame from burning the inner layer material. ; The heat insulation layer is used to reduce the spread of heat to the inner layer; the support layer is used to support and intercept the fragments; the flame retardant and explosion-proof liquid layer is used to absorb the energy of the explosion shock wave, attenuate the speed of the fragments and extinguish the fire; the shrapnel protective layer is used to protect the fragments.

Preferably, the flame-retardant and explosion-proof liquid in the flame-retardant and explosion-proof liquid layer comprises foam fire extinguishing agent, antifreeze agent, nano-silica, water-absorbent resin and water; wherein, the mass percentage content of the foam fire-extinguishing agent is 5% to 15%. %, the mass percentage content of the antifreeze agent is 5% to 15%, the mass percentage content of the nano-silicon dioxide is 2% to 6%, and the mass percentage content of the water-absorbent resin is 2% to 8%.

Preferably, the height of the flame retardant and explosion-proof liquid layer is the same as the height of the inner fence; or lower than the height of the inner fence, a shrapnel buffer layer for buffering the speed of the shrapnel is arranged above the flame retardant and explosion-proof liquid layer; the shrapnel buffer layer and the flame retardant The height of the explosion-proof liquid layer is equal to the height of the inner fence.

Preferably, the flame retardant layer is made of fireproof cotton or glass fiber; the heat insulation layer is made of aramid fiber or aerogel felt; the support layer is polyurethane foam sprayed with polyurea or PC bulletproof support plate ; The shrapnel protective layer is made of PE or aramid.

Preferably, the outer fence includes an outer fence support layer and an outer fence shrapnel protection layer; wherein the outer fence shrapnel protection layer is used to protect fragments; the outer fence support layer is used to support the outer fence shrapnel protection layer.

Preferably, the outer fence shrapnel protective layer is made of PE or aramid; the outer fence support layer is prepared by spraying polyurea polyurethane foam or PC board on the inner side of the outer fence shrapnel protective layer.

Beneficial effects:

(1) In the present invention, the inner fence and the outer fence are formed into a whole through the inner and outer connecting layers, which can effectively prevent the shock wave generated by the explosion and its reflected wave from impacting the inner fence, prevent the fence from jumping up, and prevent the ground reflection wave from affecting the fragments. The second loading enhances the ability of the overall explosion-proof blanket bulletproof sheet.

(2) The present invention also improves the inner fence structure. The inner fence of the present invention includes 5 layers, wherein the flame retardant layer and the heat insulation layer reduce the burning of the shrapnel protective layer by the high temperature flame, and prevent the shrapnel protective layer from exploding. Material failure under high temperature conditions; the flame retardant and explosion-proof liquid layer is used to absorb the shock wave energy generated by the explosion, reduce the shock wave pressure, and at the same time throw the liquid in the layer to extinguish the flame generated by the explosion; because the fragment arrives a little later than the shock wave, it passes through the support The layer intercepts small fragments, the flame retardant and explosion-proof liquid layer can also attenuate the speed of the fragments, and the fibers of the shrapnel protective layer intercept all fragments and ensure that the fragments are embedded, thus effectively improving the explosion-proof capability of the fence.

(3) The present invention also improves the structure of the outer fence to further improve the explosion-proof capability of the fence.

Description of drawings

Figure 1 is a sectional view of the new explosion-proof blanket composite fence.

Figure 2 shows Scheme A of the explosion-proof composite fence.

Figure 3 is the scheme B of the explosion-proof composite fence.

Among them, 1-inner fence, 2-inner and outer connecting layer, 3-outer fence; 1.1-flame retardant layer, 1.2-insulation layer, 1.3-support layer, 1.4-flame-retardant and explosion-proof liquid layer, 1.5-shrapnel protection layer; 3.1- Outer fence support layer, 3.2-outer fence bulletproof layer; 1.4.1-half-height explosion-proof liquid layer, 1.4.2-half-height shrapnel buffer layer.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

The present invention provides a novel explosion-proof blanket composite fence structure, as shown in FIG. 1, comprising an inner fence 1, an outer fence 3 and an inner and outer connecting piece 2; wherein, one end of the inner and outer connecting piece 2 is fixed at the bottom of the inner fence 1, and the other end is fixed at the bottom of the inner fence 1. It is fixed on the top of the outer fence 3; through the inner and outer connecting layer 2, the inner fence 1 and the outer fence 3 can be formed into a whole, which can effectively prevent the shock wave generated by the explosion and its reflected wave from impacting the inner fence, prevent the fence from jumping, and prevent the ground The secondary loading of the fragments by the reflected wave enhances the ability of the bulletproof sheet of the overall explosion-proof blanket. Preferably, the inner and outer connecting layers 2 are made of bulletproof fiber or other similar bulletproof material, preferably a bulletproof fiber layer such as aramid or PE, which can obtain better bulletproof and impact-proof effect. The inner and outer connecting layers 2 can be fixed on the inner and outer fences by sewing or with nylon buttons or other fixing methods.

In addition, the present invention also improves the structure of the inner fence and the outer fence, and further improves the fireproof and explosion-proof effect of the fence.

The inner fence 1 adopts a multi-layer multi-phase structure, which can effectively prevent the damage of the shrapnel and absorb shock waves. The inner fence mainly includes a flame retardant layer 1.1, a heat insulation layer 1.2, a support layer 1.3, a flame retardant explosion-proof liquid layer 1.4 and a shrapnel protective layer 1.5. The flame-retardant and explosion-proof liquid layer 1.4 can effectively absorb shock waves and extinguish the flame.

specific,

Flame retardant layer 1.1: mainly used to prevent high temperature flame from burning the inner layer material, the flame retardant layer will not burn above 1000 degrees Celsius; it can be made of fireproof cotton, glass fiber or similar fireproof materials;

Insulation layer 1.2: It is mainly used to reduce the transmission of heat to the shrapnel protective layer and avoid reducing the performance of the bulletproof fiber in the shrapnel protective layer. Its thermal conductivity K _x ≤ 0.3 (W·m ^-1 ·K ^-1 ); Fiber or other materials with a melting point greater than 300 ℃, or aerogel felt, made;

Support layer 1.3: It is mainly used for the overall support of the structure, and has a certain interception effect on small fragments; it is made of polyurethane foam sprayed with polyurea or PC bulletproof support plate, or other similar supporting non-metallic materials;

Flame retardant and explosion-proof liquid layer 1.4: The flame-retardant and explosion-proof liquid layer mainly absorbs the energy of the shock wave at the moment of the explosion, and has a good attenuation effect on the fragments, and at the same time contains a fire extinguishing agent, which can extinguish the flame generated by the explosion; this embodiment In the flame-retardant and explosion-proof liquid layer, there is a flame-retardant and explosion-proof liquid, and the flame-retardant and explosion-proof liquid includes foam fire extinguishing agent, antifreeze agent, nano-silicon dioxide, water-absorbent resin and water; wherein, the mass percentage content of the foam fire extinguishing agent is 5 to 15%, the mass percentage of antifreeze is 5 to 15%, the mass percentage of nano-silicon dioxide is 2 to 6%, and the mass percentage of water-absorbent resin is 2 to 8%; first determine the content of other components Then, adjust by adjusting the content of water.

The height of the flame retardant and explosion-proof liquid can be the same as the height of the inner fence (as shown in Figure 2), or any height below the height of the inner fence can be used, and then a shrapnel buffer layer that can be used to buffer the speed of the shrapnel is set above the flame retardant and explosion-proof liquid layer 1.4 .2 (as shown in Figure 3).

Shrapnel protection layer 1.5: mainly used to protect fragments; it can be made of PE or aramid layer.

The explosion-proof and fire-extinguishing principle of the 5-layer inner fence structure of the present invention is as follows: at the moment of explosion, shock waves and high-temperature flames first propagate to the fence. The material failure of the shrapnel protective layer under the high temperature conditions of explosion is avoided. The explosion shock wave squeezes the flame retardant and explosion suppression layer, converts the shock wave energy into the kinetic energy of the flame retardant and explosion proof layer, reduces the shock wave pressure, and at the same time throws the flame retardant and explosion suppression liquid to extinguish the flame generated by the explosion. The fragments arrive a little later than the shock wave. The small fragments are intercepted by the support layer. The flame retardant and explosion-proof liquid layer can also attenuate the speed of the fragments. The fibers of the shrapnel protective layer intercept all fragments and ensure that the fragments are embedded in it.

In the flame retardant and explosion-proof liquid formula in this embodiment, the fire extinguishing agent ensures efficient fire extinguishing, the antifreeze agent keeps the equipment working at -20 degrees Celsius, prevents the liquid layer from freezing at low temperature, and the suspended nanoparticles can generate friction between each other under the action of explosion , Absorb energy more efficiently without precipitation, and shear thickening liquid (mixed with water-absorbent resin and water) can efficiently absorb shock wave energy.

The outer fence 3 adopts a double-layer structure, including the outer fence support layer 3.1 and the outer fence shrapnel protection layer 3.2; among them, the outer fence shrapnel protection layer 3.2 is mainly used to protect the fragments from accidental situations or secondary loading of shock wave reflected waves, which can be Made of the same material as the shrapnel protective layer 1.5. The outer fence support layer 3.1 is mainly used for the support of the outer fence shrapnel protective layer 3.2, which can be obtained by spraying polyurea polyurethane foam, PC board, etc. on the inner side of the outer fence shrapnel protective layer 3.2.

Example 1

As shown in Figures 1 and 2, a new type of explosion-proof blanket composite fence structure includes an inner fence 1, an outer fence 3 and an inner and outer connecting layer 2. The inner fence 1 is composed of two layers of fireproof cotton 1.1 from the inside to the outside. , 5 layers of aramid fiber 1.2, 2 layers of PC support plate 1.3, 1 layer of flame retardant and explosion-proof liquid layer 1.4, 100 layers of PE layer 1.5 composite composition. The outer fence is composed of 2 layers of PC board 3.1 and 20 layers of PE layer 3.2. The flame-retardant and explosion-proof liquid is composed of 10% foam fire extinguishing agent, 10% antifreeze agent, 5% nano-silicon dioxide, 5% water-absorbing resin and 70% water.

Both the inner fence 1 and the outer fence 3 are in the shape of a hollow cylinder, and the outer fence 3 has a diameter of 700mm, a height of 160mm, and a weight of 7kg; the inner fence 1 has a diameter of 400mm, a height of 320mm, and a weight of 12kg; 1 and the outer fence 3 are connected by the inner and outer connecting layer 2, one end of the inner and outer connecting layer 2 is sewn on the bottom of the inner fence 1, and the other end is sewn on the upper part of the outer fence 3. The inner and outer connecting layers are composed of 8 layers of aramid.

Example 2

As shown in Figures 1 and 3, a new type of explosion-proof blanket composite fence structure includes an inner fence 1, an outer fence 3 and an inner and outer connecting layer 2. The inner fence is composed of two layers of glass fiber cloth 1.1 from the inside to the outside. , 2mm thickness aerogel felt 1.2, 5mm polyurethane foam spraying polyurea support plate 1.3, 15mm thickness half-height explosion-proof liquid layer 1.4.1, 15mm thickness upper end half-height PE fiber elastic sheet buffer layer 1.4.2, 100 layers of PE layer 1.5 composite composition. The outer fence is composed of 2 layers of PC board 3.1 and 20 layers of PE layer 3.2. Both the inner fence 1 and the outer fence 3 are in the shape of a hollow cylinder; the diameter of the outer fence 3 is 720mm, the height is 160mm, and the weight is 7.5kg; the diameter of the inner fence 1 is 440mm, the height is 340mm, and the weight is 12.5kg; The fence 1 and the outer fence 3 are connected by the inner and outer connecting layer 2 , one end of the inner and outer connecting layer 2 is sewn on the bottom of the inner fence 1 , and the other end is sewn on the upper part of the outer fence 3 . The inner and outer connecting layers are composed of 8 layers of aramid.

To sum up, the above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A novel explosion-proof blanket composite fence structure is characterized in that, comprising an inner fence (1), an outer fence (3) and an inner and outer connecting piece (2); wherein, one end of the inner and outer connecting piece (2) is fixed to the inner fence (2). 1) Bottom, the other end is fixed to the top of the outer fence (3). 2 . The novel explosion-proof blanket composite fence structure according to claim 1 , wherein the inner and outer connecting layers ( 2 ) are made of bulletproof material. 3 . 3. The novel explosion-proof blanket composite fence structure according to claim 1, wherein the inner and outer connecting layers (2) are made of aramid or PE. 4 . The novel explosion-proof blanket composite fence structure according to claim 1 , wherein the inner and outer connecting layers ( 2 ) are fixed on the inner and outer fences by sewing or by velcro. 5 . 5. The novel explosion-proof blanket composite fence structure according to claim 1, characterized in that, the inner fence (1) is composed of a flame retardant layer (1.1), a heat insulation layer (1.2), a support layer (1.3) from the inside to the outside in sequence. ), flame retardant and explosion-proof liquid layer (1.4) and shrapnel protective layer (1.5); wherein, the flame retardant layer (1.1) is used to prevent the burning of the inner layer material by the flame; the heat insulation layer (1.2) is used to reduce the heat inward The support layer (1.3) is used to support and intercept the fragments; the flame-retardant and explosion-proof liquid layer (1.4) is used to absorb the energy of the explosion shock wave, attenuate the speed of the fragments and extinguish the fire; the shrapnel protection layer (1.5) is used to protect the fragments. 6. The novel explosion-proof blanket composite fence structure according to claim 5, wherein the flame-retardant and explosion-proof liquid in the flame-retardant and explosion-proof liquid layer (1.4) comprises foam extinguishing agent, antifreeze agent, nano-silica, water-absorbing agent resin and water; wherein, the mass percentage content of foam fire extinguishing agent is 5% to 15%, the mass percentage content of antifreeze agent is 5% to 15%, and the mass percentage content of nano-silicon dioxide is 2% to 6%. The mass percentage content of the resin is 2% to 8%. 7. The novel explosion-proof blanket composite fence structure according to claim 5 or 6, wherein the height of the flame-retardant and explosion-proof liquid layer (1.4) is the same as the height of the inner fence; A shrapnel buffer layer (1.4.2) is arranged above the layer (1.4) for buffering the velocity of the shrapnel; the height of the shrapnel buffer layer (1.4.2) and the flame retardant and explosion-proof liquid layer (1.4) is equal to the height of the inner fence. 8. The novel explosion-proof blanket composite fence structure according to claim 5, wherein the flame retardant layer (1.1) is made of fireproof cotton or glass fiber; the heat insulation layer (1.2) is made of aramid or gas gel felt; the support layer (1.3) is a polyurethane foam sprayed with polyurea or a PC bulletproof support plate; the elastic sheet protection layer (1.5) is made of PE or aramid. 9. The novel explosion-proof blanket composite fence structure according to claim 1, wherein the outer fence (3) comprises an outer fence support layer (3.1) and an outer fence shrapnel protection layer (3.2); wherein, the outer fence shrapnel The protective layer (3.2) is used to protect fragments; the outer fence support layer (3.1) is used to support the outer fence shrapnel protective layer (3.2). 10. The novel explosion-proof blanket composite fence structure according to claim 9, wherein the outer fence shrapnel protection layer (3.2) is made of PE or aramid; the outer fence support layer (3.1) is made of an outer fence The inner side of the shrapnel protective layer (3.2) is prepared by spraying polyurea polyurethane foam or PC board.

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