Flexible explosion-proof tank

Abstract

The present application provides a kind of flexible explosion-proof tank, bulletproof fiber layer is formed by the tail end of a plurality of sheet bulletproof fiber module sewing together, and the deformable space of sewing type fiber is large, and the bulletproof performance is relatively equivalent thickness of continuous winding explosion-proof tank.This flexible explosion-proof tank includes: top cover and tank body;Tank body is the circular truncated cone structure of two ends opening, and top cover is covered in the top opening of the tank body;Tank body includes annular space surrounded by inner support layer, outer support layer and tank body top ring, and shock wave energy absorption layer and tank body bulletproof layer are sequentially arranged in the annular space from inside to outside;Tank body bulletproof layer is sequentially from inside to outside: inner bulletproof fiber layer, middle bulletproof fiber layer, outer bulletproof fiber layer and half height bulletproof fiber layer;Wherein the height of the half height bulletproof fiber layer is half of the overall height of the tank body.

Description

Technical Field

[0001] This invention relates to an explosion-proof container, specifically a flexible explosion-proof tank, belonging to the fields of police, military, and public safety defense equipment. Background Technology

[0002] Traditionally, steel explosion-proof containers are mainly used for handling explosives. The protective principle of steel explosion-proof containers is mainly to use a high-strength rigid structure to confine the explosive energy inside the container and release pressure upwards. Therefore, the requirement for steel explosion-proof containers after an explosion is that they do not disintegrate, have no cracks, and do not collapse, thus ensuring that no harm is caused to the surrounding personnel.

[0003] Explosion-proof equipment made of flexible composite materials is a new method in the field of equivalent protection. The protective principle of flexible explosion-proof canisters mainly utilizes the absorption of explosion energy by the internal flexible structure to confine the explosion energy within a certain range. Given a safe distance, there are no lethal elements outside the safe distance. Therefore, after an explosion, the requirement of flexible explosion-proof canisters is that no fragments fly out at the safe distance, and all fragments are intercepted in the bulletproof structure inside the canister. Some of the flexible energy-absorbing materials inside the canister can break, but the resulting debris is low-density material and does not cause fatal injuries. At the same time, the pressure of the explosion shock wave at the safe distance is tested to determine whether it will cause harm to the human body, thereby comprehensively judging the explosion protection effect of the flexible explosion-proof canister.

[0004] Steel explosion-proof containers offer a certain level of protection, provided they do not break after an explosion. However, their excessive weight makes them difficult to handle quickly, and they pose a risk of breakage under excessive explosion conditions. Using flexible protective materials can significantly reduce the weight of protective equipment. Even if some materials break under the impact of an explosion, they will not cause damage to the surrounding area, thus providing excellent protection.

[0005] The flexible protective material commonly used in flexible explosion-proof canisters is bulletproof fiber. Currently, all flexible explosion-proof canisters on the market use continuous fiber winding to form the bulletproof fiber layer. Although the winding method makes the connection between fiber layers tighter, it reduces the deformation space for the fibers, affecting their bulletproof performance. At the same time, due to process limitations, this method can only produce explosion-proof canisters in a straight cylindrical shape, that is, the top and bottom openings of the explosion-proof canister are the same size. This type of flexible explosion-proof canister has a small bottom space, which is not conducive to non-contact handling of explosives. Summary of the Invention

[0006] In view of this, the present invention provides a flexible explosion-proof can, wherein the bulletproof fiber layer is formed by stitching together multiple sheet-like bulletproof fiber modules end to end. The stitched fibers have a large deformable space and the bulletproof performance is better than that of a continuously wound explosion-proof can of the same thickness.

[0007] A flexible explosion-proof container includes: a top cover and a container body;

[0008] The tank has openings at both ends, and the top cover is installed on the top opening of the tank;

[0009] The tank body includes an annular space surrounded by an inner support layer, an outer support layer and a top ring of the tank body, and a shock wave energy-absorbing layer and a tank body bulletproof layer arranged sequentially from the inside to the outside within the annular space.

[0010] The bulletproof layer of the tank body includes at least one bulletproof fiber layer. Each bulletproof fiber layer is formed by two or more bulletproof fiber combinations placed together coaxially. The bulletproof fiber combination is formed by sewing two or more sheet-like bulletproof fiber modules together circumferentially. The bulletproof fiber module is made by stacking two or more bulletproof fiber layers together and then sewing them together at the edges.

[0011] In a preferred embodiment of the present invention, the bulletproof layer of the tank has four layers, which are, from the inside out: an inner bulletproof fiber layer, a middle bulletproof fiber layer, an outer bulletproof fiber layer, and a half-height bulletproof fiber layer; wherein the height of the half-height bulletproof fiber layer is half the overall height of the tank.

[0012] The inner bulletproof fiber layer is made of fibers with a melting point temperature ≥300℃ and a density ≥1.4g / cm;

[0013] The bulletproof fiber layer is made of fibers with a Cunniff velocity ≥ 700 m / s;

[0014] The outer bulletproof fiber layer is made of fibers with a breaking elongation of ≥3% or a burst tear strength of ≥6KN.

[0015] In a preferred embodiment of the present invention, there is a gap between the outer support layer and the half-height bulletproof fiber layer.

[0016] In a preferred embodiment of the present invention, the gap between the outer support layer and the half-height bulletproof fiber layer is not less than 20 mm.

[0017] In a preferred embodiment of the present invention, the tank body is a frustum-shaped shell structure.

[0018] In a preferred embodiment of the present invention, the middle bulletproof fiber layer is formed by placing 10 to 20 bulletproof fiber combinations together in a coaxial sleeve; the half-height bulletproof fiber layer is formed by placing 4 to 8 bulletproof fiber combinations together in a coaxial sleeve; both the inner and outer bulletproof fiber layers are formed by placing 5 to 20 bulletproof fiber combinations together in a coaxial sleeve; and the half-height bulletproof fiber layer is formed by placing 4 to 8 bulletproof fiber combinations together in a coaxial sleeve.

[0019] In a preferred embodiment of the present invention, the seams of the bulletproof fiber modules in two adjacent bulletproof fiber assemblies are staggered.

[0020] As a preferred embodiment of the present invention, the inside of the tank is provided with a mesh bag for placing the explosive during contact disposal.

[0021] In a preferred embodiment of the present invention, the net is used to position the frying height at 1 / 3 to 1 / 2 of the overall height of the can.

[0022] In a preferred embodiment of the present invention, the lower end of the inner support layer extends outward with an annular protrusion, and the lower ends of the shock wave energy-absorbing layer, the tank bulletproof layer and the outer support layer are all supported on the annular protrusion.

[0023] The inner support layer has through holes distributed on its circumferential surface.

[0024] As a preferred embodiment of the present invention, one or more waist-shaped holes are evenly distributed circumferentially on the circumferential surface of the inner support layer.

[0025] As a preferred embodiment of the present invention, the area of ​​the opening on the circumferential surface of the inner support layer is not less than 20% of its circumferential surface area.

[0026] In a preferred embodiment of the present invention, the inner support layer is formed of foam-sprayed polyurea or foam polyurethane material.

[0027] In a preferred embodiment of the present invention, the top cover includes: a top cover support layer, an explosion-proof liquid layer, and a top cover bulletproof layer; the top cover support layer is a hollow cylindrical structure; the bulletproof layer and the explosion-proof liquid layer are stacked from top to bottom in its internal space.

[0028] In a preferred embodiment of the present invention, the lower end face of the top cover support layer has an opening; the area of ​​the opening is not less than 20% of the total area of ​​the lower end face of the top cover support layer.

[0029] In a preferred embodiment of the present invention, the top cover includes: a top cover support layer, an explosion-proof liquid layer, and a top cover bulletproof layer;

[0030] The lower end of the top cover support layer extends downward with a small-diameter annular protrusion, and the outer circumferential surface of the annular protrusion matches the inner circumferential surface of the tank opening; the annular protrusion is a hollow structure, and the top cover bulletproof layer and the explosion-proof liquid layer are stacked from top to bottom inside it.

[0031] In a preferred embodiment of the present invention, the lower end face of the annular boss is provided with openings, the area of ​​which is not less than 20% of the total area of ​​the lower end face of the annular boss.

[0032] In a preferred embodiment of the present invention, the top cover includes: a top cover support layer, an explosion-proof liquid layer, and a top cover bulletproof layer; the lower end of the top cover support layer extends downward with a small-diameter annular protrusion; the upper part of the top cover with a larger diameter is a hollow structure, and the top cover bulletproof layer and the explosion-proof liquid layer are stacked from top to bottom inside the cover.

[0033] The outer circumferential surface of the annular boss extending downward from the lower end of the top cover support layer matches the inner circumferential surface of the tank opening; and the lower end surface of the annular boss is a concave arc-shaped surface.

[0034] In a preferred embodiment of the present invention, a mesh bag is provided inside the tank, and the mesh bag is used to make the explosion height located at 1 / 3 to 1 / 2 of the overall height of the tank; the center of the arc surface of the lower end face of the annular boss is located at the explosion center.

[0035] As a preferred embodiment of the present invention, a base is also included; the can is placed on the base.

[0036] In a preferred embodiment of the present invention, the base is a movable base with one or more casters installed at the bottom.

[0037] In a preferred embodiment of the present invention, the edge of the base has an annular protrusion, and the can body is located within the area surrounded by the annular protrusion.

[0038] In a preferred embodiment of the present invention, a handle is provided on the outer surface of the can.

[0039] Beneficial effects:

[0040] (1) In the flexible explosion-proof can of the present invention, the bulletproof layer of the can body adopts a stitched bulletproof fiber layer, which has good flexibility and does not require special winding machines and processes. Due to the small pre-tightening force between layers, the reserved fiber space has large deformation. Under the same number of layers, the bulletproof performance is better than that of the continuously wound explosion-proof can.

[0041] (2) In the flexible explosion-proof can of the present invention, the bulletproof layer of the can body adopts a stitched bulletproof fiber layer, which can obtain a frustum-shaped explosion-proof can according to the design requirements. The explosion-proof can with this structure has a large bottom space, which is conducive to non-contact disposal of explosives, and the overall weight is light.

[0042] (3) In the flexible explosion-proof can of the present invention, the bulletproof layer of the can body includes multiple layers of bulletproof fibers with different properties, which achieve a better protective effect through multi-layer cooperation. The innermost inner bulletproof fiber layer uses bulletproof fibers with good fire resistance and a higher density, because for high-speed fragments, the density of the fibers has a greater impact on the bulletproof performance. Using high-density bulletproof fibers in the innermost layer has a better deceleration effect on high-speed fragments. The middle bulletproof fiber layer uses fibers with high bulletproof efficiency, which can protect the fragments after the fragment speed has decreased to a certain extent. The outer bulletproof fiber layer uses fibers with good tear resistance, which are not easy to break after large deformation. Finally, a half-height bulletproof fiber layer is set on the outermost layer to increase bottom protection.

[0043] (4) In the flexible explosion-proof can of the present invention, there is a certain gap between the outer support layer and the bulletproof layer of the can body. This gap ensures that the bulletproof fibers in the bulletproof layer of the can body have the deformation space under the action of explosive fragments, and avoids the outer support layer and the bulletproof fibers from directly contacting each other, which would reduce the deformation space and affect the bulletproof performance.

[0044] (5) In the top cover of the present invention, the lower end face (i.e. the impact-facing face) of the top cover support layer has multiple openings, which can reduce weight and increase the area of ​​direct interaction between the shock wave and the explosion-proof liquid layer, thereby improving the shock wave absorption efficiency.

[0045] (6) In the top cover of the present invention, the top cover support layer is stepped. When the top cover is placed on the tank, its lower end annular protrusion is embedded in the tank to prevent movement. At the same time, since it is closer to the explosion center, it can absorb more energy.

[0046] (7) In the top cover of the present invention, the lower end face of the annular boss extending downward from the lower end of the top cover support layer is a concave arc surface, and the center of the arc structure is located at the explosion center; after the explosion, the explosion shock wave propagates outward in a spherical wave. The top cover with this structure can make the explosion shock wave act evenly on the top cover and avoid premature leakage from the top connection.

[0047] (8) In the top cover of the present invention, the top cover support layer is encapsulated with polyurea sprayed with foam material or polyurethane foam material, so that even if it disintegrates after an explosion, it will not cause damage to the surrounding area.

[0048] (9) The explosion-proof container of the present invention has a built-in mesh bag, which enables contact disposal of explosives.

[0049] (10) In the explosion-proof container of the present invention, by adopting a frustum-shaped explosion-proof structure, an arc-shaped top cover, adding a half-height bulletproof fiber layer, and setting the explosion height (height of explosives) at 1 / 3 to 1 / 2 of the height of the container, the shock wave overpressure and fragments can be evenly distributed in the explosion-proof container to the greatest extent.

[0050] (11) The outer surface of the tank has a handle, which can be lifted by two people, making it convenient to move the flexible explosion-proof tank.

[0051] (12) The base is movable to facilitate the rapid movement of the flexible explosion-proof container. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the overall structure of the flexible explosion-proof container of this invention;

[0053] Figure 2 This is a schematic diagram of the top cover structure in Example 1;

[0054] Figure 3 This is a sectional view of the tank.

[0055] Figure 4 This is a schematic diagram of the internal support structure of the explosion-proof tank;

[0056] Figure 5 This is a structural schematic diagram of a bulletproof fiber module;

[0057] Figure 6 This is a schematic diagram of the structure of the bulletproof fiber assembly;

[0058] Figure 7 This is a schematic diagram of the assembly process of the flexible explosion-proof canister of the present invention.

[0059] Figure 8 This is a schematic diagram of the stepped top cover in Example 2;

[0060] Figure 9 and Figure 10 This is a schematic diagram of the arc-shaped top cover in Example 3;

[0061] The components are: 1-top cover, 2-tank body, 3-base, 1.1-top cover support layer, 1.2-explosion-proof liquid layer, 1.3-top cover bulletproof layer, 2.1-tank body top ring; 2.2-inner support layer; 2.3-shock wave energy absorption layer; 2.4-inner bulletproof fiber layer; 2.5-middle bulletproof fiber layer; 2.51-bulletproof fiber module; 2.6-outer bulletproof fiber layer; 2.7-half-height bulletproof fiber layer; 2.8-outer support layer; 2.9-net bag. Detailed Implementation

[0062] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0063] Example 1:

[0064] This embodiment provides a flexible explosion-proof canister with an overall frustum-shaped structure and a large bottom space, which is conducive to non-contact disposal of explosives. Furthermore, each bulletproof fiber layer in the canister's bulletproof layer is formed by stitching together multiple sheet-like bulletproof fiber modules end to end. The stitched fibers have a large deformable space, and the bulletproof performance is better than that of a continuously wound explosion-proof canister of the same thickness.

[0065] like Figure 1 As shown, the overall structure of the flexible explosion-proof container includes: a top cover 1 and a container body 2, with a base 3 as a supporting structure (i.e., the base 3 is only used for moving the explosion-proof container; it is not needed when the explosion-proof container is handling explosives). The container body 2 is placed on the base 3, which is a movable base to facilitate the movement of the flexible explosion-proof container; the top cover 1 is installed on the top opening of the container body 2.

[0066] Specifically: The base 3 is made of foamed polyethylene material and has 3-4 casters installed at the bottom, featuring light weight and high reliability; it is used to support the tank 2. The casters have a self-locking function; normally, the casters are in a self-locking state, and when in use, the casters can be released for quick movement. To prevent the tank 2 from slipping during movement, the edge of the base 3 has a protrusion, that is, the edge of the base 3 has an annular protrusion (or it can be a protrusion spaced circumferentially), and the tank 2 is located within the area surrounded by the annular protrusion; to reduce weight, the base 3 has weight-reducing holes.

[0067] like Figure 2 As shown, the top cover 1 includes: a top cover support layer 1.1, an explosion-proof liquid layer 1.2, and a top cover bulletproof layer 1.3. In this example, the top cover support layer 1.1 is a hollow cylindrical structure. Specifically, the upper and lower ends of the top cover support layer 1.1 are closed, and the top cover bulletproof layer 1.3 and the explosion-proof liquid layer 1.2 are stacked from top to bottom in its internal space. The top cover bulletproof layer 1.3 is made of one or a mixture of two types of bulletproof fibers, such as aramid fiber and PE fiber, cut into a circle, sewn with high-strength thread, and placed inside the top cover support layer 1.1 to prevent it from scattering during an explosion. The lower end face (i.e., the impact-facing surface) of the top cover support layer 1.1 has multiple openings to reduce weight and increase the area where the shock wave directly interacts with the explosion-proof liquid layer 1.2. In this example, the lower end face of the top cover support layer 1.1 has multiple waist-shaped holes evenly spaced along the circumference, and the length direction of the waist-shaped holes is along the radial direction at the corresponding position; the area of ​​the opening is not less than 20% of the total area of ​​the lower end face of the top cover support layer 1.1. The top cover support layer 1.1 is encapsulated with polyurea foam material sprayed on or polyurethane foam material, so that even if it disintegrates after an explosion, it will not cause damage to the surrounding area.

[0068] In this example, the top cover 1 is a cylindrical top cover, the diameter of which is the same as the diameter of the top of the can 2, and it is connected to the can 2 by Velcro (e.g., ...). Figure 1In this container, multiple Velcro straps are provided circumferentially on the top of the container 2 (for attaching the top cover 1). For contact handling of explosives, simply open the top cover 1, place the explosive inside the container 2, and then place the top cover 1 on top of the container 2. For non-contact handling of explosives, move the explosion-proof container near the explosive using the base 3, then lift the container 2 connected to the top cover 1 to cover the explosive.

[0069] like Figure 3 As shown, the internal space of the tank 2 is used to place explosives; the tank 2 is a frustum-shaped shell structure with open ends and a smaller top and larger bottom (i.e., the tank 2 has a uniform wall thickness, and both its inner and outer circumferential surfaces are frustum-shaped surfaces with a smaller top and larger bottom). Under the condition of the same weight, it is convenient to place larger explosive structures at the bottom; at the same time, since the shock wave will be reflected at the bottom and form a stronger shock wave, when the bottom is larger, it can prevent the shock wave from contacting the explosion-proof structure too early, and instead, it will be attenuated over a longer spatial distance before acting on the explosion-proof structure.

[0070] The tank body 2 is a multi-layered composite structure, consisting of, from the inside out: an inner support layer 2.2, a shock wave energy-absorbing layer 2.2, a tank body bulletproof layer, and an outer support layer 2.8. It also includes a tank top ring 2.1 positioned on top of the inner support layer 2.2, the shock wave energy-absorbing layer 2.2, the tank body bulletproof layer, and the outer support layer 2.8. The tank top ring 2.1 is bonded to both the inner support layer 2.2 and the outer support layer 2.8, forming an annular cavity structure for housing the shock wave energy-absorbing layer 2.2 and the tank body bulletproof layer. The inner support layer 2.2, the shock wave energy-absorbing layer 2.2, and the tank body bulletproof layer may be bonded or not connected, but are directly stacked together from the inside out. The outer support layer 2.8 is spaced apart from the tank body bulletproof layer.

[0071] like Figure 4 As shown, the inner support layer 2.2 is composed of foam-sprayed polyurea or foam polyurethane material. The inner support layer 2.2 is a frustum-shaped shell structure with uniform wall thickness. An annular protrusion extends outward from its lower end (i.e., the larger end). The lower ends of the shock wave absorbing layer 2.2, the bulletproof layer, and the outer support layer 2.8 are all supported on this annular protrusion (at least the lower end of the outer support layer 2.8 is bonded to this annular protrusion). Through holes are opened on the circumferential surface of the inner support layer 2.2 (the circumferential surface of the frustum-shaped structure). In this example, preferably, multiple waist-shaped holes are evenly distributed circumferentially on the circumferential surface of the inner support layer 2.2 (the length direction of the waist-shaped holes is along the generatrix direction of the frustum-shaped shell at the corresponding position). This ensures support strength while allowing the shock wave to fully mix with the explosion-proof liquid in the outer shock wave absorbing layer 2.2, increasing the shock wave absorption efficiency. The area of ​​the opening is 20% to 50% of the area of ​​the 2.2-frustum-shaped part of the inner support layer; furthermore, in this example, the center of each hole is at the blast height, and the position of the opening is symmetrical (i.e., evenly spaced along the circumference), to avoid the explosion-proof canister from overturning during an explosion due to general asymmetry.

[0072] The shock wave absorbing layer 2.3 is an explosion-proof liquid encapsulated by a thin film, which is the explosion-proof liquid layer of the tank. The shock wave absorbing layer 2.3 is a frustum-shaped shell structure with uniform wall thickness; the explosion-proof liquid inside is a flame-retardant mixture. At the moment of explosion, it mixes thoroughly with the shock wave, absorbs the shock wave energy, and converts the shock wave energy into the kinetic energy of the liquid, thus attenuating the shock wave. At the same time, since the liquid does not have lethality after the explosion (generally, the liquid after the explosion forms a mist with a speed of 10-50 m / s under the action of the shock wave, and the lower the viscosity of the liquid, the better its dispersion effect, thus the collateral damage is small and the shock wave absorption efficiency is high).

[0073] The bulletproof layer of the tank has a multi-layer structure, consisting of the following layers from the inside out: inner bulletproof fiber layer 2.4, middle bulletproof fiber layer 2.5, outer bulletproof fiber layer 2.6, and half-height bulletproof fiber layer 2.7. Each layer of the bulletproof layer is encapsulated with a fire-resistant, light-proof, and water-proof film to prevent ultraviolet rays, salt spray, etc. from causing performance degradation of the bulletproof fibers. Furthermore, each bulletproof fiber layer is a frustum-shaped shell structure with equal wall thickness.

[0074] The inner bulletproof fiber layer 2.4 uses bulletproof fibers with good fire resistance (fiber melting point temperature ≥300℃) and high density (≥1.4g / cm³). Examples include bulletproof and high-temperature resistant bulletproof fibers formed by one or more combinations of aramid fibers, PBO fibers, and glass fibers. In this example, the inner bulletproof layer 2.4 uses 5 to 20 layers of aramid fibers with a high density, because fiber density has a significant impact on bulletproof performance for high-speed fragmentation.

[0075] The inner ballistic fiber layer 2.5 is the main ballistic layer, using fibers with high ballistic efficiency, i.e., fibers with a Cunniff velocity ≥700m / s, such as 80-120 layers of PE fiber. This is because after being intercepted by the inner ballistic fiber layer, the fragment velocity is somewhat reduced, and at this point, using high-strength PE fiber is more beneficial for fragment protection.

[0076] The outer bulletproof fiber layer 2.6 uses fibers with good tear resistance, i.e., fiber breaking elongation ≥3%, or fiber bursting tear strength ≥6KN (GB / T 14800-2010); such as aramid fiber, PBO fiber, or a combination thereof. In this example, the outer bulletproof fiber layer 2.6 uses 10 to 20 layers of aramid fiber, because aramid fiber has a larger breaking strain than PE fiber and is less prone to breakage after large deformation.

[0077] The half-height bulletproof fiber layer 2.7 is half the overall height of the tank body 2, and its bottom is supported on the annular protrusion of the inner support layer 2.2. The half-height bulletproof fiber layer 2.7 is set because the explosion will generate reflected waves on the ground, which will enhance the shock wave energy at the bottom, so the bottom needs to be reinforced for protection. Furthermore, since the velocity of the fragments generally increases in a gradient from the detonation point when the explosive is detonated from the top, the fragment velocity is higher near the bottom of the explosive, so the half-height bulletproof fiber layer 2.7 is used to increase the bottom protection.

[0078] In this example, instead of using the traditional method of fiber winding to form the bulletproof fiber layer, the following sewing method is used to form the inner bulletproof fiber layer 2.4, the middle bulletproof fiber layer 2.5, the outer bulletproof fiber layer 2.6, and the half-height bulletproof fiber layer 2.7.

[0079] Because the 2.5mm thick bulletproof fiber layer is relatively thick and truncated cone-shaped, it is easy to produce large errors if it is cut and sewn in one go, and the sewing is also quite difficult; therefore, several layers (the number of layers is generally determined by the softness of the material, usually 5 to 25 layers) are first cut according to the set size. Figure 5 The rectangular sheet structure shown is then stitched together at the edges of multiple layers with high-strength stitching to form a single unit, serving as the bulletproof fiber module 2.51 (which can be understood as dividing the circumferential surface of the middle bulletproof fiber layer 2.5 into multiple arc-shaped units of the same size, with each sheet-like bulletproof fiber module 2.51 being an arc-shaped unit). Figure 5 As shown; using the same method, multiple bulletproof fiber modules 2.51 are sewn together, and then the multiple bulletproof fiber modules 2.51 are sewn together end to end along the circumference to form a frustum-shaped bulletproof fiber assembly, as shown. Figure 6 As shown. Similarly, multiple bulletproof fiber combinations are sewn together and then coaxially nested together. In this example, 10 to 20 bulletproof fiber combinations are coaxially nested together to form the middle bulletproof fiber layer 2.5; and the seams of each bulletproof fiber module 2.51 in two adjacent bulletproof fiber combinations are staggered by a certain angle; in this example, when nesting the bulletproof fiber combinations, the seams of the bulletproof fiber modules 2.51 at the same position in the bulletproof fiber combination are staggered by 45° in the same direction (such as clockwise).

[0080] The semi-high bulletproof fiber layer 2.7 has a large radius and a small thickness. After cutting out sheet-like structures of a set size, it is stacked in a certain number of layers (5 to 10 layers) and sewn together at the edges with high-strength sewing thread to form a semi-high bulletproof fiber combination. Similarly, multiple (4 to 8) semi-high bulletproof fiber combinations are sewn together and coaxially fitted together to form the semi-high bulletproof fiber layer 2.7. The seams of the bulletproof fiber modules in two adjacent semi-high bulletproof fiber combinations are staggered by a certain angle.

[0081] Similarly, the inner bulletproof fiber layer 2.4 and the outer bulletproof fiber layer 2.6 are processed in the same way as described above. The inner bulletproof fiber layer 2.4 has 5 to 20 layers of bulletproof fiber combination, and the outer bulletproof fiber layer 2.6 has 5 to 20 layers of bulletproof fiber combination.

[0082] The outer support layer 2.8 primarily serves a supporting function while protecting the internal bulletproof tank layer, preventing direct contact between the bulletproof tank layer and the outside environment. The outer support layer 2.8 mainly employs a foam-sprayed polyurea structure, with a certain gap between it and the bulletproof tank layer (i.e., a gap between the outer support layer 2.8 and the semi-high bulletproof fiber layer 2.7). This gap ensures sufficient deformation space for the bulletproof fibers within the bulletproof tank layer under the action of explosive fragments, preventing direct contact between the outer support layer 2.8 and the bulletproof fibers from reducing deformation space and affecting bulletproof performance. Furthermore, since the deformation of the bulletproof fibers on the back under the action of explosive fragments can be approximately 20-50mm, this gap is generally designed to be around 20-50mm, meaning the gap between the outer support layer 2.8 and the semi-high bulletproof fiber layer 2.7 is approximately 20-50mm.

[0083] The assembly process of tank 2 is as follows: Figure 7 As shown, first, the inner support layer 2.2 is placed, then the shock wave absorbing layer 2.3 is fitted over the inner support layer 2.2, the inner bulletproof fiber layer 2.4 is fitted over the shock wave absorbing layer 2.3, the middle bulletproof fiber layer 2.5 is fitted over the inner bulletproof fiber layer 2.4, the outer bulletproof fiber layer 2.6 is fitted over the middle bulletproof fiber layer 2.5, and the half-height bulletproof fiber layer 2.7 is fitted over the outer bulletproof fiber layer 2.6. Finally, epoxy resin is used to fix the bottom of the outer support layer 2.8 to the annular protrusion at the bottom of the inner support layer 2.2, and epoxy resin is used to fix the top ring 2.1 of the tank to the top of the inner support layer 2.2 and the outer support layer 2.8. The entire tank 2 is then encapsulated.

[0084] The net 2.9 is located inside the inner support layer 2.2 and is connected to the inner support layer 2.2. When handling explosives by contact, the explosives are placed on the net 2.9. The height of the net 2.9 from the ground is 1 / 3 to 1 / 2 of the overall height of the tank 2. That is, when handling explosives by contact, the explosion height is located at 1 / 3 to 1 / 2 of the height of the tank 2, which can maximize the even distribution of shock wave overpressure and fragments inside the explosion-proof tank.

[0085] The outer surface of tank 2 is equipped with 2 to 4 handles for easy lifting.

[0086] Example 2:

[0087] Based on the above embodiment 1, in this example, the top cover 1 is as follows: Figure 8As shown in the stepped design, the top cover 1 also includes a top cover support layer 1.1, an explosion-proof liquid layer 1.2, and a top cover bulletproof layer 1.3. The difference from the above embodiment 1 is that, in this example, the lower end of the top cover support layer 1.1 extends downward with a small-diameter annular protrusion, forming a stepped shape; that is, the diameter of the smaller diameter part (annular protrusion) at the lower end of the top cover support layer 1.1 is consistent with the inner diameter of the upper opening of the tank body 2, and the diameter of the larger diameter part at the upper end is consistent with the outer diameter of the upper end of the tank body 2; the annular protrusion at the lower end of the top cover support layer 1.1 is a hollow structure, and the top cover bulletproof layer 1.3 and the explosion-proof liquid layer 1.2 are stacked from top to bottom inside it.

[0088] In addition, the lower end face of the annular boss has multiple waist-shaped holes, and the area of ​​the holes is not less than 20% of the total area of ​​the lower end face of the annular boss.

[0089] Therefore, when the top cover 1 in this embodiment is placed on the tank body 2, its lower annular protrusion is embedded in the tank body 2 to prevent movement. At the same time, because it is closer to the explosion center, it can absorb more energy.

[0090] Preferably, the annular boss extending downward from the lower end of the top cover support layer 1.1 is a frustum shape that matches the inner circumferential surface of the tank body 2, that is, when the annular boss is embedded in the tank body 2, the outer circumferential surface of the annular boss is in contact with the inner circumferential surface of the tank body 2.

[0091] Example 3:

[0092] Based on the above embodiment 1, in this example, the top cover 1 is as follows: Figure 9 and Figure 10 As shown in the example, the top cover 1 is also stepped in this embodiment. That is, the lower end of the top cover support layer 1.1 extends downward with a small-diameter annular protrusion. The diameter of the larger diameter part of the upper end of the top cover 1 is consistent with the outer diameter of the upper end of the tank body 2, and the larger diameter part is a hollow structure. Inside, the top cover bulletproof layer 1.3 and the explosion-proof liquid layer 1.2 are stacked from top to bottom.

[0093] The outer circumferential surface of the annular boss extending downward from the lower end of the top cover support layer 1.1 is a frustum shape that matches the inner circumferential surface of the tank body 2. When the top cover 1 in this embodiment is placed on the tank body 2, its lower annular boss is embedded inside the tank body 2 and contacts the inner circumferential surface of the tank body 2. The lower end surface of this annular boss is a concave arc-shaped surface, and the center of this arc-shaped structure is located at the explosion center, i.e. Figure 10 As shown, the height hz of the center of the arc structure from the bottom of the tank 2 is 1 / 3 to 1 / 2 of the height Ht of the tank 2.

[0094] After the explosion, the blast shock wave propagates outward in a spherical shape. The top cover 1 with this structural form can make the blast shock wave act evenly on the top cover 1, and avoid premature leakage from the top connection.

[0095] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A flexible explosion-proof container, characterized in that: include: Top cover and tank body; The tank has openings at both ends, and the top cover is installed on the top opening of the tank; The tank body includes an annular space surrounded by an inner support layer, an outer support layer and a top ring of the tank body, and a shock wave energy-absorbing layer and a tank body bulletproof layer arranged sequentially from the inside to the outside within the annular space. The bulletproof layer of the tank body includes at least one bulletproof fiber layer. Each bulletproof fiber layer is formed by two or more bulletproof fiber combinations placed together coaxially. The bulletproof fiber combination is formed by sewing two or more sheet-like bulletproof fiber modules together circumferentially. The bulletproof fiber module is made by stacking two or more bulletproof fiber layers together and then sewing them together at the edges.

2. The flexible explosion-proof container as described in claim 1, characterized in that: The canister has four bulletproof layers, from the inside out: inner bulletproof fiber layer, middle bulletproof fiber layer, outer bulletproof fiber layer, and half-height bulletproof fiber layer; wherein the height of the half-height bulletproof fiber layer is half the overall height of the canister. The inner bulletproof fiber layer is made of fibers with a melting point temperature ≥300℃ and a density ≥1.4g / cm; The bulletproof fiber layer is made of fibers with a Cunniff velocity ≥ 700 m / s; The outer bulletproof fiber layer is made of fibers with a breaking elongation of ≥3% or a burst tear strength of ≥6KN.

3. The flexible explosion-proof container as described in claim 2, characterized in that: There is a gap between the outer support layer and the semi-high bulletproof fiber layer.

4. The flexible explosion-proof container as described in claim 3, characterized in that: The gap between the outer support layer and the semi-high bulletproof fiber layer is not less than 20mm.

5. The flexible explosion-proof container as described in claim 1, characterized in that: The tank body has a frustum-shaped shell structure.

6. The flexible explosion-proof container as described in claim 2, characterized in that: The middle bulletproof fiber layer is formed by placing 10 to 20 bulletproof fiber combinations together in a coaxial sleeve; the half-height bulletproof fiber layer is formed by placing 4 to 8 bulletproof fiber combinations together in a coaxial sleeve; both the inner and outer bulletproof fiber layers are formed by placing 5 to 20 bulletproof fiber combinations together in a coaxial sleeve; and the half-height bulletproof fiber layer is formed by placing 4 to 8 bulletproof fiber combinations together in a coaxial sleeve.

7. The flexible explosion-proof container as described in any one of claims 1-6, characterized in that: In two adjacent bulletproof fiber assemblies, the seams of each bulletproof fiber module are staggered.

8. The flexible explosion-proof container as described in any one of claims 1-6, characterized in that: The container is equipped with a mesh bag inside, which is used to place the explosives during contact disposal.

9. The flexible explosion-proof container as described in claim 8, characterized in that: The net is used to position the frying height at 1 / 3 to 1 / 2 of the overall height of the tank.

10. The flexible explosion-proof container as described in any one of claims 1-6, characterized in that: The lower end of the inner support layer extends outward with an annular protrusion, and the lower ends of the shock wave energy-absorbing layer, the tank bulletproof layer and the outer support layer are all supported on the annular protrusion. The inner support layer has through holes distributed on its circumferential surface.

11. The flexible explosion-proof container as described in claim 10, characterized in that: The inner support layer has one or more waist-shaped holes evenly spaced along the circumferential direction on its circumferential surface.

12. The flexible explosion-proof container as described in claim 11, characterized in that: The area of ​​the openings on the circumferential surface of the inner support layer is not less than 20% of its circumferential surface area.

13. The flexible explosion-proof container as described in claim 10, characterized in that: The inner support layer is formed of foam-sprayed polyurea or foamed polyurethane material.

14. The flexible explosion-proof container as described in any one of claims 1-6, characterized in that: The top cover includes: a top cover support layer, an explosion-proof liquid layer, and a top cover bulletproof layer; the top cover support layer is a hollow cylindrical structure; the bulletproof layer and the explosion-proof liquid layer are stacked from top to bottom in its internal space.

15. The flexible explosion-proof container as described in claim 14, characterized in that: The lower end face of the top cover support layer has an opening; the area of ​​the opening is not less than 20% of the total area of ​​the lower end face of the top cover support layer.

16. The flexible explosion-proof container as described in any one of claims 1-6, characterized in that: The top cover includes: a top cover support layer, an explosion-proof liquid layer, and a top cover bulletproof layer; The lower end of the top cover support layer extends downward with a small-diameter annular protrusion, and the outer circumferential surface of the annular protrusion matches the inner circumferential surface of the tank opening; the annular protrusion is a hollow structure, and the top cover bulletproof layer and the explosion-proof liquid layer are stacked from top to bottom inside it.

17. The flexible explosion-proof container as described in claim 16, characterized in that: The lower end face of the annular boss has openings, and the area of ​​the openings is not less than 20% of the total area of ​​the lower end face of the annular boss.

18. The flexible explosion-proof container as described in any one of claims 1-6, characterized in that: The top cover includes: a top cover support layer, an explosion-proof liquid layer, and a top cover bulletproof layer; the lower end of the top cover support layer extends downward with a small-diameter annular protrusion; the upper part of the top cover with a larger diameter is a hollow structure, and the top cover bulletproof layer and the explosion-proof liquid layer are stacked from top to bottom inside it. The outer circumferential surface of the annular boss extending downward from the lower end of the top cover support layer matches the inner circumferential surface of the tank opening; and the lower end surface of the annular boss is a concave arc-shaped surface.

19. The flexible explosion-proof container as described in claim 18, characterized in that: The tank is equipped with a net, which keeps the explosion height at 1 / 3 to 1 / 2 of the overall height of the tank; the center of the arc-shaped surface at the lower end of the annular boss is located at the explosion center.

20. The flexible explosion-proof container as described in any one of claims 1-6, characterized in that: It also includes a base; the can is placed on the base.

21. The flexible explosion-proof container as described in claim 20, characterized in that: The base is a movable base with one or more casters installed at the bottom.

22. The flexible explosion-proof container as described in claim 21, characterized in that: The base has an annular protrusion on its edge, and the can is located within the area enclosed by the annular protrusion.

23. The flexible explosion-proof container as described in any one of claims 1-6, characterized in that: A handle is provided on the outer surface of the tank.

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