Porous spherical barrier explosion-proof unit body

Abstract

The utility model discloses a porous spherical barrier anti-explosion unit body, which relates to the technical field of barrier anti-explosion, and comprises a grid hollow sphere, and the surface of the grid hollow sphere is a hollow sphere formed by connecting circular ring sheets in a staggered manner. The blocking anti-explosion unit body is of a regular sphere structure, it can be guaranteed that the unit body can freely roll and evenly and tightly fill the whole space in the filling process, and mechanical filling and discharging of the unit body into and out of a storage container can be achieved; the structure is simple, the stable and compression-resistant grid spherical shell structure is formed only by intersecting the circular ring pieces, it can be guaranteed that a single unit body has enough compression strength without other reinforcing pieces to increase the strength, the unit body cannot be damaged or collapsed after being stacked for a long time, and the service life of the unit body is prolonged. Meanwhile, the unit bodies of the grid spherical shell structure are stacked, so that a uniform and compact honeycomb structure can be formed more easily, and the fire retardance and explosion suppression performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion isolation and prevention, in particular to a porous spherical explosion isolation and prevention unit body. Background Technique

[0002] Explosion isolation and prevention materials refer to materials that can be filled into containers and pipelines of flammable and explosive liquids or gases to effectively block the spread of flames and suppress explosions. They are usually used to prevent fire and explosion accidents caused by factors such as static electricity, open flames, baking, and impacts in fuel containers and pipelines. Explosion isolation and prevention materials are not only of great significance for ensuring the safe production, storage, and transportation of flammable and explosive liquids or gases, but also have special safety significance for preventing fuel tanks of airplanes and vehicles, fuel transport tank trucks, and fixed storage tanks from suffering from shelling and explosive blasting in wars or terrorist attacks, resulting in the fuel being instantly scattered to form a cloud under the direct action of a powerful shock wave, generating a more destructive "secondary explosion", and reducing casualties and equipment losses.

[0003] At present, the widely used explosion isolation and prevention materials at home and abroad are mainly two categories: network metal materials mainly composed of network aluminum alloy and network polyurethane foam. However, in the application practice of explosion isolation and prevention materials at home and abroad for many years, it has been found that these two categories of materials still have many disadvantages: the network aluminum alloy material can act as an electrochemical anode under certain conditions and undergo electrochemical corrosion to produce oxidizing dirt to pollute the medium. At the same time, there are problems such as its own structure being prone to collapse, being unable to be filled in narrow spaces, and being very difficult to load and unload; the network polyurethane foam material not only has problems such as high retention rate and poor hydrolysis stability in a high-humidity environment, but also has the problem of being difficult to load and unload.

[0004] Existing research shows that non-metallic porous spherical explosion isolation and suppression materials can well solve the above problems. However, there are still many deficiencies in the existing non-metallic porous spherical explosion isolation and suppression material units: First, no appropriate diameter size of the spherical unit is proposed, or the proposed diameter size is inappropriate. For non-metallic porous spherical explosion isolation and suppression material units, the smaller the diameter, the better the fire and explosion suppression performance, while the larger the diameter, the more conducive to meeting the requirements of the low effective volume reduction rate index. Therefore, the appropriate sphere diameter should be the result of optimized design in combination with large-scale production technology on the basis of ensuring good explosion isolation and suppression performance and meeting the fundamental principle that the effective volume reduction rate ≤ 6%; Second, the configurations of some units are not regular spheres, which not only affect free rolling during filling but also tend to bite each other, resulting in an uneven honeycomb structure and large "voids" inside the entire container or pipeline; Third, some units have obvious independent thin walls, so their compressive capacity is significantly insufficient; Fourth, in the structures of some units, there are multiple reinforcement members in addition to the necessary components. Although the reinforcement members can improve the compressive strength of the unit, it is difficult to meet the requirement of the effective volume reduction rate in the container ≤ 6%, and some units do not consider the effective volume reduction rate at all in the design. Summary of the Invention

[0005] The purpose of the present invention is to provide a porous spherical explosion isolation and suppression unit to solve the problems existing in the above prior art, so that the spherical shape of the explosion isolation and suppression unit is full, the hollowing is uniform, the diameter is appropriate, the compressive capacity in all directions is strong, and the requirement of the effective volume reduction rate in the container can be met.

[0006] To achieve the above purpose, the present invention provides the following solutions:

[0007] The present invention provides a porous spherical explosion isolation and suppression unit, including a grid hollow sphere. The surface of the grid hollow sphere is a hollow sphere composed of alternately connected circular ring pieces. The diameter of the hollow sphere is 25 mm - 30 mm, and the areas of the hollows of the hollow sphere differ by no more than 40 mm 2 .

[0008] Preferably, the grid hollow sphere includes a number of large ring pieces, medium ring pieces and small ring pieces. A number of large ring pieces are circumferentially distributed uniformly around the same diameter of the hollow sphere as the central axis. There is one large ring piece perpendicular to the central axis and perpendicularly intersecting with other large ring pieces. The medium ring pieces and the small ring pieces are both parallel to the central axis and are circumferentially distributed uniformly along the central axis. The connecting lines of the intersections of adjacent small ring pieces form a regular polygon and there is a large ring piece parallel to the central axis passing through the intersections. The regular polygon is perpendicular to the central axis and is located on the large ring piece perpendicular to the central axis. The medium ring pieces are respectively connected to two adjacent small ring pieces and the four connection points form a rectangle. The rectangle is perpendicular to the central axis and the connection points are circumferentially distributed uniformly along the central axis.

[0009] Preferably, there are five large ring pieces, four medium ring pieces and four small ring pieces respectively. The connecting lines of the intersections of adjacent small ring pieces form a square and the medium ring pieces are arranged in a "well" shape.

[0010] Preferably, the hollow sphere is divided into two hemispherical shells along the midline of the large ring piece.

[0011] Preferably, the large ring piece perpendicular to the central axis is a combined ring piece. The hollow sphere is divided into two hemispherical shells along the midline of the combined ring piece and the ring thickness of the combined ring piece is the largest.

[0012] Preferably, the hemispherical shell is injection molded from a non-metallic material. The non-metallic material includes thermoplastic resin or thermoplastic resin-based composite material.

[0013] Preferably, the ring widths of the large ring piece, the medium ring piece and the small ring piece gradually become larger. The ring thicknesses of the medium ring piece and the small ring piece are not greater than the ring thickness of the large ring piece.

[0014] Preferably, each ring width is between 1 mm and 3 mm and is not equal. Each ring thickness is between 0.5 mm and 2.5 mm and is not equal.

[0015] Preferably, the grid hollow sphere includes two hemispherical shells with a cross-grid structure. The end faces of the hemispherical shells are connected by hot melt welding to form a sphere, and the corresponding semi-rings are butted to form ring pieces.

[0016] The present utility model has achieved the following technical effects compared with the prior art:

[0017] The barrier explosion-proof unit of the present utility model has a regular spherical structure, which can not only ensure that the unit can roll freely during filling and uniformly and tightly fill the entire space, but also realize the mechanical filling and unloading of the unit into the storage container; the sphere diameter is 25 - 30 mm, which can enable the unit to have good fire and explosion suppression performance after filling, and can also make the width and thickness of the circular ring sheets forming the unit meet the requirements of the injection molding process for large-scale industrial production; the structure is simple, and only by crossing circular ring sheets with each other, a stable and compressive grid spherical shell structure is formed. Without other reinforcement parts to increase the strength, it can ensure that a single unit has sufficient compressive strength, so that the units will not be damaged or collapsed after long-term stacking, and can meet the requirements of the reduction rate of the effective volume in the container. At the same time, the stacking of the units with a grid spherical shell structure is more conducive to forming a uniform and dense honeycomb structure to improve the fire and explosion suppression performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of the porous spherical barrier explosion-proof unit in the embodiment of the present utility model;

[0020] Figure 2 It is a schematic structural diagram of the hemispherical shell in the embodiment of the present utility model;

[0021] Figure 3 It is a schematic top view structural diagram of the hemispherical shell in the embodiment of the present utility model;

[0022] In the figure: 1 - large circular ring sheet, 2 - small circular ring sheet, 3 - medium circular ring sheet, 4 - combined circular ring sheet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0024] The purpose of the present utility model is to provide a porous spherical barrier explosion-proof unit to solve the problems existing in the prior art, so that the spherical shape of the barrier explosion-proof unit is full, the hollowing is uniform, the diameter is appropriate, the compressive capacity in all directions is strong, and it can meet the requirements of the reduction rate of the effective volume in the container.

[0025] In order to make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Embodiment 1

[0027] As shown in Figures 1 to 3 , in this embodiment, a porous spherical explosion-proof and isolation unit body is provided, which includes a grid hollow sphere. The surface of the grid hollow sphere is a hollow sphere formed by the staggered connection of ring sheets. The diameter of the hollow sphere is 25 mm - 30 mm, and the areas of the various hollow parts of the hollow sphere differ by no more than 40 mm 2 , ensuring the uniformity and regularity of the sphere appearance, avoiding the formation of spatial depressions due to the contact of adjacent spheres, so that after the unit body fills the storage container, it not only has good fire and explosion suppression performance but also meets the requirements of the reduction rate of the effective volume in the container.

[0028] As an alternative solution, in this embodiment, the grid hollow sphere includes a number of large ring sheets 1, medium ring sheets 3, and small ring sheets 2. A number of large ring sheets 1 are circumferentially evenly distributed around the same diameter of the hollow sphere as the central axis. There is one large ring sheet 1 (in the equator direction) perpendicular to the central axis and perpendicularly intersecting with other large ring sheets 1 (in the meridian direction). The medium ring sheets 3 and small ring sheets 2 are both parallel to the central axis and a number of them are circumferentially evenly distributed along the central axis. The connecting lines of the intersection points of adjacent small ring sheets 2 form a regular polygon and there is a large ring sheet 1 parallel to the central axis passing through the intersection points. The regular polygon is perpendicular to the central axis and is located on the large ring sheet 1 perpendicular to the central axis. The medium ring sheets 3 are respectively connected to two adjacent small ring sheets 2 and the four connection points form a rectangle. The rectangle is perpendicular to the central axis and the connection points are circumferentially evenly distributed along the central axis, trying to form a centrosymmetric figure around the central axis to balance the compressive capacity in all directions.

[0029] As an alternative solution, in this embodiment, there are five large ring sheets 1, four medium ring sheets 3 and four small ring sheets 2 respectively. The connecting lines of the intersection points of adjacent small ring sheets 2 form a square. The medium ring sheets 3 are arranged in a "well" shape, trying to make the ring sheets evenly distributed and form a uniformly distributed grid, so that the areas of the various hollow parts differ little, ensuring that no excessive spatial pressure defects will occur when adjacent hollow spheres come into contact, thereby affecting the overall effective volume, and at the same time meeting the requirements of the reduction rate of the effective volume of the hollow spheres in the container.

[0030] As an alternative solution, in this embodiment, the hollow sphere is divided into two hemispherical shells along the midline of the large ring sheet 1, and at the same time, the corresponding large ring sheets 1, medium ring sheets 3, and small ring sheets 2 in the corresponding areas are all divided into semi-ring sheets, divided into two symmetric structures, which is convenient for processing with the same set of molds and reduces the manufacturing cost.

[0031] As an alternative, in this embodiment, the large ring plate 1 perpendicular to the central axis is the bonding ring plate 4. The hollow sphere is divided into two hemispherical shells along the midline of the bonding ring plate 4, which is convenient for meeting the requirements of the processing technology. Moreover, the ring thickness of the bonding ring plate 4 is the largest, which is convenient for being divided into two ring plates with equal thicknesses and for hot melt welding.

[0032] As an alternative, in this embodiment, the hemispherical shell is injection molded from a non-metallic material, and the non-metallic material includes thermoplastic resin or thermoplastic resin-based composite material. In this embodiment, the non-metallic material is a composite material made of nylon 1010 added with an appropriate amount of highly conductive carbon black.

[0033] As an alternative, in this embodiment, the ring widths of the large ring plate 1, the middle ring plate 3, and the small ring plate 2 gradually increase, and the ring thicknesses of the middle ring plate 3 and the small ring plate 2 are not greater than the ring thickness of the large ring plate 1.

[0034] As an alternative, in this embodiment, the widths of each ring are all between 1 mm and 3 mm and are not equal, the thicknesses of each ring are between 0.5 mm and 2.5 mm and are not equal, and the diameter of the combined hollow sphere is between 25 mm and 30 mm. This embodiment can ensure that after the unit body is filled, it has good fire and explosion suppression performance, can meet the requirements of the reduction rate of the effective volume in the container, and can also ensure that the widths and thicknesses of the ring plates constituting the unit body meet the requirements of the injection molding process, so as to facilitate large-scale industrial production; the widths and thicknesses of the rings can be optimized according to the requirements of the reduction rate of the effective volume in the container and the production process requirements.

[0035] As an alternative, in this embodiment, the grid hollow sphere includes two hemispherical shells with a cross-grid structure. The end faces of the hemispherical shells are connected into a sphere by hot melt welding, and the corresponding semi-rings are butted into ring plates to ensure the coherence and integrity of the structure.

[0036] The porous spherical explosion suppression and isolation unit body can divide the oil and gas space into smaller spaces. In appearance, it is that small holes are densely arranged and cover the entire oil and gas space; when the oil and gas are accidentally ignited, the flame fluid will encounter the division and blockage of the small holes during its travel, resulting in the continuous weakening and even extinction of the flame during the process of splitting and impacting the hole walls, thereby preventing the explosion of the container. The explosion suppression and isolation unit body of this embodiment is a hollow and evenly distributed regular spherical appearance, which can be loaded into the storage container or pipeline manually or mechanically. During the loading process, the spheres roll freely and fill the entire container or pipeline evenly and tightly and can reach an ideal packing density, dividing the internal space of the entire container or pipeline into a huge number of interconnected small holes. In appearance, it is that the small holes are densely packed to form a uniform and dense three-dimensional honeycomb structure. This special structure has excellent performance in preventing flame propagation, suppressing explosion overpressure, hindering and buffering the propagation and impact of explosion shock waves, etc., so as to achieve the effect of explosion suppression and isolation.

[0037] Example 2

[0038] In this embodiment, there are 4 large circular wafers 1, 1 combined circular wafer 4 (the large circular wafer 1 perpendicular to the central axis), 4 small circular wafers 2, and 4 medium circular wafers 3. Among them, the outer contour diameter of each large circular wafer 1 is 30 mm, the width of the circular ring is 2 mm, and the thickness of the circular ring is 0.6 mm. The 4 large circular wafers 1 intersect at the vertex of the spherical shell, divide the sphere into eight equal parts, and are all perpendicularly intersected with the combined circular wafer 4.

[0039] Among them, the outer contour diameter of each small circular wafer 2 is 21.21 mm, the width of the circular ring is 3.2 mm, and the thickness of the circular ring is 0.55 mm. Each small circular wafer 2 is perpendicularly intersected with the combined circular wafer 4. Among them, the intersection points of the small circular wafer 2 and the combined circular wafer 4 coincide with the intersection points of the large circular wafer 1 and the combined circular wafer 4.

[0040] Among them, the outer contour diameter of each medium circular wafer 3 is 25.98 mm, the width of the circular ring is 2.2 mm, and the thickness of the circular ring is 0.55 mm. Each medium circular wafer 3 is perpendicularly intersected with the combined circular wafer 4. Moreover, the medium circular wafer 3 also penetrates some vertical intersection points of the large circular wafer 1 and the small circular wafer 2 on the spherical shell surface, and is arranged in a "#" or "well" shape when viewed from above, as Figure 2 shown.

[0041] Among them, the outer contour diameter of the combined circular wafer 4 is 30 mm, the width of the circular ring is 1.2 mm, and the thickness of the circular ring is 2.4 mm.

[0042] The porous spherical explosion-proof and isolation unit body with a non-metallic cross-grid spherical shell configuration in this embodiment includes two hemispherical shells with a cross-grid structure. The hemispherical shells with a cross-grid structure are processed by an injection molding process, and the two hemispherical shells are welded together by heat melting of the joint surface of the combined circular wafer 4. This embodiment is a regular spherical structure with a hollow and evenly distributed shape, and a stable compressive grid spherical shell structure is formed by the mutual intersection of thin circular wafers, which can not only make the unit bodies stack to form a uniform and dense honeycomb structure to improve the fire and explosion suppression performance, but also meet the requirements of the reduction rate of the effective volume in the container.

[0043] In the present utility model, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A porous spherical barrier explosion-proof unit, characterized in that: It includes a grid hollow sphere, the surface of which is a hollow sphere composed of interlaced circular ring pieces, the diameter of which is 25mm-30mm, and the difference in area of ​​each hollow of the hollow sphere is no more than 40mm 2 .

2. The porous spherical barrier explosion-proof unit according to claim 1, characterized in that: The grid hollow sphere includes a plurality of large circular ring pieces, medium circular ring pieces and small circular ring pieces, wherein a plurality of large circular ring pieces are evenly distributed circumferentially with the same diameter of the hollow sphere as the central axis, a large circular ring piece is perpendicular to the central axis and intersects perpendicularly with other large circular ring pieces, the medium circular ring pieces and the small circular ring pieces are parallel to the central axis and are evenly distributed circumferentially along the central axis, the intersection line of adjacent small circular ring pieces is a regular polygon and a large circular ring piece parallel to the central axis passes through the intersection, the regular polygon is perpendicular to the central axis and is located on the large circular ring piece perpendicular to the central axis, the medium circular ring piece is respectively connected to two adjacent small circular ring pieces and the four connection points form a rectangle, the rectangle is perpendicular to the central axis, and the connection points are evenly distributed circumferentially along the central axis.

3. The porous spherical barrier explosion-proof unit according to claim 2, characterized in that: There are five large circular ring pieces, four medium circular ring pieces and four small circular ring pieces respectively, the intersection line of adjacent small circular ring pieces is a square, and the medium circular ring pieces are arranged in a "well" shape.

4. The porous spherical barrier explosion-proof unit according to claim 2, characterized in that: The hollow sphere is divided into two hemispherical shells along the midline of the large circular ring piece.

5. The porous spherical barrier explosion-proof unit according to claim 2, characterized in that: The large circular ring piece perpendicular to the central axis is a combined circular ring piece, the hollow sphere is divided into two hemispherical shells along the midline of the combined circular ring piece, and the circular ring thickness of the combined circular ring piece is the largest.

6. The porous spherical barrier explosion-proof unit according to claim 4 or 5, characterized in that: The hemispherical shell is injection-molded from a non-metallic material, and the non-metallic material includes a thermoplastic resin or a thermoplastic resin-based composite material.

7. The porous spherical barrier explosion-proof unit according to claim 2, characterized in that: The ring widths of the large ring piece, the medium ring piece and the small ring piece gradually increase, and the ring thicknesses of the medium ring piece and the small ring piece are not greater than the ring thickness of the large ring piece.

8. The porous spherical explosion-proof barrier unit according to claim 7, characterized in that: The width of each circular ring is between 1mm and 3mm and is not equal, and the thickness of each circular ring is between 0.5mm and 2.5mm and is not equal.

9. The porous spherical barrier explosion-proof unit according to claim 1, characterized in that: The grid hollow sphere includes two hemispherical shells of a cross grid structure, the end faces of the hemispherical shells are connected to form a sphere by hot-melt welding, and the corresponding semicircular rings are butt-jointed to form a circular ring sheet.

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