CN112161521B

CN112161521B - Modular spliced explosion protection fence and explosion-proof blanket

Info

Publication number: CN112161521B
Application number: CN202010996012.XA
Authority: CN
Inventors: 黄广炎; 杨立人; 田广卫; 完颜振海; 卞晓兵; 王博
Original assignee: Beijing Technology Al Safety Technology Co ltd; Beijing Institute of Technology BIT
Current assignee: Beijing Technology Al Safety Technology Co ltd; Beijing Institute of Technology BIT
Priority date: 2020-07-06
Filing date: 2020-09-21
Publication date: 2022-09-23
Anticipated expiration: 2040-09-21
Also published as: CN112161521A

Abstract

The invention discloses a modular splicing type explosion protection fence and an explosion protection blanket. The size of the fence can be changed, the fence is suitable for suspected explosives with different sizes, high-speed fragments generated by explosion can be effectively intercepted, hard media are not contained, and secondary damage cannot be generated during excessive explosion; meanwhile, the occupied space is small during storage at ordinary times, and the mass of a single module is light. The modularized spliced fence is formed by splicing a plurality of same single module structures; the single-module structure is made of flexible bulletproof materials and cannot cause secondary damage, the single-module structure comprises a bulletproof layer, a supporting layer and an elastic layer, fragments generated by explosion are embedded into a fence, and the fragments are prevented from rebounding and bouncing under the action of an explosion product to cause damage.

Description

Modular spliced explosion protection fence and explosion-proof blanket

Technical Field

The invention relates to the technical field of explosion-proof equipment, in particular to a modularized spliced explosion protection fence and an explosion-proof blanket.

Background

The explosion attack is the most powerful way to kill terrorist attacks, and the main injuries to human bodies in the explosion process are shock waves and fragments. When the pressure peak value of the shock wave reaches 0.03MPa, the human body is damaged; for small equivalent explosive, such as about 40-60 g TNT equivalent of a grenade, the killing range of the shock wave is within 3m, the main killing mode is fragmentation, and for fragmentation, the kinetic energy of the fragmentation is generally considered to be 10 kg.m ² This will cause damage to the human body.

With the spread of terrorism worldwide, explosives come in various forms and sizes. Generally, explosives have some external packages, such as leather bags, luggage cases, packing bags, etc. for camouflage. When the outer explosive package is bulky and not suitable for unpacking, there is a need for an explosive disposal device that can meet its appropriate size. Existing explosive handling equipment, such as explosion-proof tanks, barrels, boxes, blankets, etc., are fixed in size. The larger the explosive, the larger the blast protection equipment it requires, and the larger the blast protection equipment, the larger its volume and weight take. For structures where the size of the explosive is larger than that of the explosion-proof equipment, disposal is not possible. In addition, existing explosive disposal equipment is monolithic, which has certain inconvenience in storage and transportation.

CN206264477U discloses an explosion-proof rail of module concatenation formula, but its structure is complicated, and the technological requirement is higher, and the concatenation time is longer. When the splicing fence is used for processing explosives, splicing needs to be carried out around the explosives on site, and if the explosives explode at the moment, high risk exists. In addition, the spliced explosion-proof fence contains hard media such as metal or ceramic at the spliced position, and if excessive explosion occurs, the structure is likely to be disassembled to cause secondary damage.

Disclosure of Invention

In view of the above, the invention provides a modular splicing type fence and an explosion-proof blanket, which can be assembled quickly when in use, can change the size of the fence, are suitable for suspected explosives with different sizes, can effectively intercept high-speed fragments generated by explosion, do not contain hard media, and cannot generate secondary damage when excessive explosion occurs; meanwhile, the occupied space is small when the module is stored at ordinary times, and the single module is light in weight.

The modularized splicing type fence is formed by splicing a plurality of same single module structures; the single-module structure comprises a flexible bulletproof layer 3.3, a supporting layer 3.4 and an elastic layer 3.5, wherein the bulletproof layer 3.3 is used for preventing fragment damage during explosion; the supporting layer 3.4 is used for supporting the whole structure; the elastic layer 3.5 is arranged on the inner side of the single-module structure, and when the fragments penetrate through the elastic layer and are embedded into the bulletproof layer, the elastic layer has certain contractibility, so that the fragments are prevented from being ejected out after being embedded into the bulletproof layer; one end of the single-module structure is protruded, the length of the protrusion is 1/4-1/3 of the length of the single-module structure, the width of the protrusion is 1/4-1/3 of the width of the single-module structure, and the other end of the single-module structure is provided with a groove matched with the protrusion; the adjacent single module structures are spliced together through the bulges and the grooves to form the fence.

Preferably, the single-module structure further comprises a fire-proof layer 3.2 and an outer package 3.1, wherein the fire-proof layer 3.2 is wrapped outside the bulletproof layer, the supporting layer and the elastic layer and is used for preventing flame from burning the internal structure in explosion; the outer package 3.1 is intended to be waterproof and to provide some protection.

Preferably, the external package 3.1 adopts waterproof oxford; the fire-proof layer 3.2 adopts double-layer fire-proof cloth.

Preferably, the bulletproof ceramic tile comprises a plurality of supporting layers 3.4 and bulletproof layers 3.3, wherein the supporting layers 3.4 and the bulletproof layers 3.3 are arranged in a staggered mode in sequence.

Preferably, the elastic layer 3.5 is made of rubber, polyurea or polyurethane elastomer; the bulletproof layer 3.3 is made of one or more bulletproof fiber materials which are woven by mixing bulletproof PE fibers, aramid fibers, PBO fibers and high-strength glass fibers; the support layer 3.4 adopts a PC plate, and 1-2mm polyurea is sprayed on the surface of the PC plate.

Preferably, the rail fence also comprises a strap, and the strap is wrapped on the outer surface of the rail fence and is used for tightly fastening the rail fence; the width of the strap is above 2/3 of the fence height.

Preferably, the belt is made of one or more fiber materials of bulletproof PE fibers, aramid fibers, PBO fibers and high-strength glass fibers.

Preferably, the bridle is adhered to the outer surface of the fence through a magic tape and tightened.

The invention also provides an adjustable explosion-proof blanket which comprises an inner fence, an outer fence and a blanket, wherein the inner fence is the modularized spliced fence.

Preferably, the peripheral fence is the modular spliced fence.

Has the advantages that:

the modularized spliced fence is formed by splicing a plurality of same single module structures, can be spliced according to the size of explosives, is made of flexible bulletproof materials, cannot cause secondary damage, can embed fragments generated by explosion into the fence before large deformation, prevents the fragments from splashing, and can provide effective protection.

The structure of the fence is improved, and the functions of fire prevention, impact prevention and fragment prevention are improved while the fence has certain elasticity.

Drawings

Fig. 1 is a schematic structural diagram of an adjustable explosion-proof blanket.

FIG. 2(a) is a schematic view of the overall structure of a single module of the enclosure; fig. 2(b) is a schematic structural diagram of a single module of the fence.

Fig. 3 is a schematic diagram of a spliced modular spliced fence. FIG. 3(a) shows 6 tiles; fig. 3(b) is an 8-block splice.

Fig. 4 is a schematic view of a belt structure.

Figure 5 shows the 62g charge for 0.04ms, i.e. the deformation of the pen at the beginning of the explosion.

Figure 6 shows the deformation of the rail at 0.08ms for a 62g charge, i.e. an explosive shock wave, as it reaches the inner rail structure.

Fig. 7 shows the case of fence deformation when the 62g explosive reaches the inner fence for 0.2 ms.

Fig. 8 shows the case of a 62g explosive charge for 1ms, i.e. the deformation of the pen when the inner pen begins to undergo a large deformation.

Wherein, 1-blanket, 2-bridle, 3-inner fence, 4-outer fence; 3.1-external package, 3.2-fireproof layer, 3.3-bulletproof layer, 3.4-supporting layer and 3.5-elastic layer.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

The invention provides a modularized spliced fence which is mainly applied to a fence structure of an explosion-proof blanket. The explosion-proof blanket has the advantages that the explosion-proof performance of the explosion-proof blanket is mainly embodied on the inner fence, so that the inner fence adopts the structure of the invention, and the peripheral fence can adopt the structure of the invention and also can adopt the traditional integrated structure or other structures. The peripheral column can adopt the hierarchical structure designed by the invention, and can also adopt the traditional hierarchical structure or other structures. The present embodiment is mainly explained by taking an inner fence as an example.

The modular splicing type fence is formed by splicing 6 single-module structures as shown in fig. 3, wherein the diameter of the whole fence is 200-500mm, and the height of the whole fence is 200-400 mm. The single module structure is shown in fig. 2, which is 1/6 of a whole fence, one end of the single module structure is convex, the length of the convex is 1/4-1/3 of the length of the single module structure, the thickness of the convex is 1/4-1/3 of the width of the single module structure, and the other end of the single module structure is provided with a groove matched with the convex; the adjacent single module structures are spliced together through the bulges and the grooves to finally form the circular inner fence.

The single-module structure is made of flexible bulletproof materials and comprises a flexible bulletproof layer 3.3, a supporting layer 3.4 and an elastic layer 3.5; the elastic layer 3.5 is arranged on the inner side of the single-module structure and has certain elasticity, and when the fragments penetrate through the elastic layer and are embedded into the bulletproof layer, the elastic layer has certain contractibility, so that the fragments are prevented from rebounding and bouncing under the action of explosive products to cause damage; the elastic layer 3.5 may be made of an elastic material such as rubber, polyurea, or polyurethane elastomer. The bulletproof layer 3.3 is used for preventing damage of fragments to the inner supporting layer in explosion, and can be made of one or more bulletproof fiber materials which are woven by mixing bulletproof PE fibers, aramid fibers, PBO fibers and high-strength glass fibers. The supporting layer 3.4 is used for supporting the whole structure, and can be made of non-metal materials (which can be bent but are rigid in the up-down direction) with certain flexibility, such as a PC board, a PP board and the like; in the embodiment, the PC board is adopted for supporting, and 1-2mm polyurea is sprayed on the PC board for preventing the PC board from being cracked and hurting people in explosion.

When the fragments fly and penetrate into the fence under the action of explosive impact, the elastic layer contracts to embed the fragments into the elastic layer, so that the fragments are prevented from being continuously loaded by detonation products after being rebounded. The single module structure has certain elasticity, can take place the structure of certain deformation, consequently, can change the internal diameter of rail through the concatenation number that changes the single module structure in certain extent. Fig. 3(a) shows a fence formed by splicing 6 single-module structures, and fig. 3(b) shows a fence formed by splicing 8 same single-module structures.

Further, the embodiment improves the single-module structure, further improves the elasticity and the performance of preventing fire, impact and breakage, and wraps the fire-proof layer 3.2 and the outer package 3.1 outside the bulletproof layer 3.3, the supporting layer 3.4 and the elastic layer 3.5; the single module structure comprises a supporting layer 3.4, a bulletproof layer 3.3, an elastic layer 3.5, a fireproof layer 3.2 and an outer package 3.1 from inside to outside in sequence; wherein, the supporting layer 3.4 and the bulletproof layer 3.3 can be arranged in a plurality of layers in a staggered way, so that the bulletproof capability and the structural strength of the single module structure are improved.

Wherein, the outer package 3.1 adopts a material with waterproof function and certain structural strength, is used for preventing water, ultraviolet rays, common external force, tearing and the like, protects the inner structure and prolongs the inner service life; the waterproof function is to avoid the reaction between the internal structure and water and reduce the explosion-proof performance of the equipment; the strength is higher, can satisfy general mechanical properties, protects its inside other layers. The external package 3.1 can adopt waterproof oxford cloth, waterproof canvas and the like, and the embodiment adopts the waterproof oxford cloth.

The fire-proof layer 3.2 is used for preventing the fire of flame to the internal bulletproof layer in explosion, and the embodiment adopts double-layer fireproof cloth.

When the single-module structure is manufactured, firstly, the bulletproof layers such as PE are sewn together through PE threads or are bonded together through glue, in the embodiment, the number of the bulletproof layers is three, and each bulletproof layer is 30-60. After the bonding is finished, the bulletproof layer is sequentially bonded with a supporting layer, namely, the bulletproof layer, the supporting layer, the bulletproof layer and the supporting layer, and then the elastic layer is bonded on the supporting layer of the innermost layer. And packaging with waterproof oxford cloth after wrapping with fireproof cloth.

In order to further enhance the structural strength of the modular spliced fence, the periphery of the spliced fence can be wrapped with a binding band 2 for binding, as shown in fig. 4, the width of the binding band is greater than the height 2/3 of the fence. The belt 2 is made of bulletproof materials, such as one or more of bulletproof PE fibers, aramid fibers, PBO fibers and high-strength glass fibers which are mixed and woven. The magic tapes can be arranged on the outer surface of the single-module structure and the inner surface of the strap, and the strap is stuck on the fence and tightened through the magic tapes.

The explosion-proof principle analysis of the modular spliced fence comprises the following steps: during the explosion, the time of action on the inner rail is 10 ^-4 Second order, and the deformation tear of a single module structure is 10 ^-3 And the single module structure is not greatly deformed, the fragments are embedded into the single module structure, and after the fragments are embedded, the damage to surrounding personnel and articles can be avoided. So connect between the single module structure need not too much consider the problem of intensity, can guarantee when assembling not scattered can, through the band with further connection between each module, tie a knot the band, can guarantee the integrality of structure in the transport.

In the explosion process, the speed of fragments and shock waves is over 1000m/s, the time of acting on the explosion-proof structure is extremely short, generally within 1ms, and if the fragments generated by explosion are intercepted within the time, the structure can be ensured not to cause great damage to surrounding people or objects even if the structure is disassembled afterwards.

The following is further explained in connection with an embodiment simulation calculation:

the bulletproof layer adopts a 3-layer bulletproof structure, 40 PE layers are used for each layer, the supporting layer adopts a 2mm PC plate, 1.5mm polyurea is sprayed on the surface, and the elastic layer adopts a polyurethane elastomer to prepare a single-module structure. The inner rail of the explosion-proof blanket is spliced by 6 single-module structures, and the inner diameter of the inner rail is 400 mm. The inner fence structure with 6 module structures is established through simulation, 62g of TNT equivalent explosive is placed in the middle of the inner fence structure for simulation test, 3 steel ball fragments with the diameter of 4mm are placed beside the TNT, the simulation calculation results are shown in figures 5-8, and it can be seen that the time when the shock wave reaches the inner fence is 8E-5s, the time when the fragments reach the inner fence is 2E-4s, at the moment, the inner fence is not obviously deformed, and the fragments can continuously penetrate the inner fence and are embedded into the inner fence. Certain displacement begins to appear at 1ms time in interior rail overall structure, and during the fragment had been embedded into interior rail this moment, does not take place to kick-back, so even equip the disintegration, also can prevent the injury of high-speed fragment.

For a conventional grenade, the inner charge was 62g tnt, with an overall mass of 260 g. For the protection of shock waves, the damage limit according to the human body shock waves is about 0.03 Mpa. According to the national defense design engineering specification, the shock wave pressure at the position of 2.2m does not cause fatal damage to human bodies.

Is the comparative distance, w is the mass of the explosive, r is the distance from the center of the explosion, and P is the shock wave overpressure.

When the TNT equivalent is reduced, the time for decomposing the structure is prolonged, and the equipment is more reliable.

The speed of the general calculation of the fragment is calculated by adopting a gurney formula. Wherein D is the explosive detonation velocity, for TNT charging, the detonation velocity is 6640m/s, and alpha is the explosive loading ratio, which is the ratio of the explosive mass to the whole mass. The speed of fragmentation averages:

the reference inner diameter is 400mm, the time for the fragment to reach the protective equipment is as follows:

it can be seen through theoretical analysis that the fragment has reached protective equipment in 0.1ms, and the structure just can take place to disintegrate just can not wait for the fragment to imbed wherein after the fragment just can take place to disintegrate under the shock wave effect this moment, and protective equipment can effectually protect to the fragment.

And then 8 single module structures prepared from the same size and materials are spliced, so that the inner part of the fence is 530mm, the inner diameter is increased, and explosives with larger outer package volume can be effectively treated. Therefore, the modular splicing type fence can effectively prevent the damage of fragments. And when the fence is not used, the fence can be disassembled into a single module structure at ordinary times, so that the fence is convenient to store and transport, and can be spliced quickly when being used.

The invention also provides an adjustable explosion-proof blanket, which comprises an inner fence, an outer fence and a blanket, as shown in fig. 1, wherein the inner fence adopts the modular spliced fence, and the outer fence can adopt the modular spliced fence or a traditional integrated fence. When the explosion-proof blanket is used for arranging explosives, the single module structures are firstly spliced to form the inner fence, and then the bundling belt is used for winding and then the knot is locked. And surrounding the explosive substance by the spliced inner fence, assembling into a peripheral fence by the same method, or connecting the spliced inner fence and the peripheral fence by using an integrated peripheral fence, placing the peripheral fence outside the inner fence, and finally covering a blanket, namely finishing the temporary treatment of the explosive substance.

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

1. A modularized spliced fence is characterized in that the fence is formed by splicing a plurality of same single module structures; the single module structure comprises an elastic layer (3.5), a plurality of bulletproof layers (3.3) and a supporting layer (3.4); the bulletproof layer (3.3) is made of one or more bulletproof fiber materials which are woven by mixing of bulletproof PE fibers, aramid fibers, PBO fibers and high-strength glass fibers and is used for preventing fragment damage during explosion; the support layer (3.4) adopts a PC plate, and 1-2mm of polyurea is sprayed on the surface of the PC plate and is used for supporting the whole structure; the elastic layer (3.5) is made of rubber or polyurethane elastomer and is arranged on the inner side of the single module structure to prevent fragment rebound; the supporting layers (3.4) and the bulletproof layers (3.3) are arranged in a staggered mode in sequence; one end of the single-module structure is protruded, the length of the protrusion is 1/4-1/3 of the length of the single-module structure, the width of the protrusion is 1/4-1/3 of the width of the single-module structure, and the other end of the single-module structure is provided with a groove matched with the protrusion; the adjacent single module structures are spliced together only through the bulges and the grooves to form the circular ring-shaped fence.

2. The modular sectional fence according to claim 1, characterized in that the elastic layer (3.5) is polyurea.

3. The modular split rail according to claim 1, wherein the single modular structure further comprises a fire resistant layer (3.2) and an outer package (3.1), wherein the fire resistant layer (3.2) is wrapped outside the bulletproof layer, the supporting layer and the elastic layer for preventing the fire of the inner structure when the fire breaks; the outer packaging (3.1) is intended to be waterproof and to provide protection.

4. The modular sectional fence according to claim 3, characterized in that the outer package (3.1) is made of waterproof oxford; the fireproof layer (3.2) adopts double-layer fireproof cloth.

5. The modular split rail of any of claims 1-4, further comprising a strap wrapped around the outer surface of the rail for tightening the rail; the width of the strap is above 2/3 of the fence height.

6. The modular split fence of claim 5, wherein said straps are made of one or more fiber materials selected from the group consisting of ballistic PE fiber, aramid fiber, PBO fiber, and high strength glass fiber.

7. The modular sectional surround of claim 5, wherein the strap is adhered to the surround outer surface by hook and loop fasteners and tightened.

8. An adjustable explosion-proof blanket, comprising an inner fence, an outer fence and a blanket, wherein the inner fence is a modular spliced fence as claimed in any one of claims 1 to 7.

9. The adjustable explosion proof blanket of claim 8, wherein the peripheral rail is a modular split rail as defined in any one of claims 1-7.