Explosion-proof door leaf production process and explosion-proof door leaf

Abstract

The invention relates to an explosion-proof door leaf production process and an explosion-proof door leaf, and belongs to the technical field of explosion-proof doors, the explosion-proof door leaf comprises multiple layers of aluminum honeycomb plates which are sequentially stacked, and the honeycomb densities of the multiple layers of aluminum honeycomb plates are different; according to the compressive strength required value of the explosion-proof door leaf, the compressive strength design value of each layer of aluminum honeycomb panel is determined; based on the compressive strength design value, selecting various combinations of the aluminum foil thickness, the lattice side length and the aluminum honeycomb plate height of the aluminum honeycomb plate; calculating the total thickness of the explosion-proof door leaf under each combination and the total value of absorbable energy per unit area, verifying whether the total thickness and the total value of absorbable energy per unit area meet the required value of the explosion-proof door leaf, if not, adjusting the number of layers of the aluminum honeycomb panel, the thickness of the aluminum foil, the side length of a lattice and / or the height of the aluminum honeycomb panel until the total thickness and the total value meet the required value of the explosion-proof door leaf; the technical problem of poor explosion-proof effect in the prior art can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of explosion-proof doors, and particularly relates to a production process of an explosion-proof door leaf and an explosion-proof door leaf. Background Art

[0002] An explosion-proof door is an anti-explosion protection device designed to resist accidental explosions outside industrial buildings, safeguard the safety of personnel's lives and keep the internal equipment of industrial buildings intact. It can be free from the harm of explosion shock waves and effectively prevent the continuation of explosion hazards, and is widely used in various industries. With people paying more and more attention to production safety, the requirements for the use of explosion-proof doors are also getting higher and higher.

[0003] Currently, a Chinese patent with the publication number CN205558717U discloses an explosion-proof door, which includes an outer door panel; a buffer layer, one end of which is connected to the outer door panel; an inner door panel, which is connected to the end of the buffer layer away from the outer door panel; and a sliding connection mechanism, one end of which is connected to the outer door panel and the other end is connected to the inner door panel. This explosion-proof door has a simple structure and uses a sliding connection mechanism to connect the inner and outer door panels, requiring little maintenance. However, it has the following defects: the buffer layer inside this explosion-proof door only uses sponge and spring to buffer the door body, and its buffering effect is limited, resulting in low explosion-proof performance. Summary of the Invention

[0004] In view of various deficiencies in the prior art, the present invention proposes a production process of an explosion-proof door leaf and an explosion-proof door leaf to solve the technical problem of poor explosion-proof effect in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions: In a first aspect, the present invention provides a production process of an explosion-proof door leaf. The explosion-proof door leaf includes multiple layers of aluminum honeycomb panels stacked in sequence, and the honeycomb densities of the multiple layers of aluminum honeycomb panels are different; The production process includes the following steps: S100. Determine the compressive strength design values of each layer of aluminum honeycomb panel according to the required value of the compressive strength of the explosion-proof door leaf; S200. Based on the compressive strength design values, select various combinations of the aluminum foil thickness, lattice side length, and height of the aluminum honeycomb panel; S300. Calculate the total thickness of the explosion-proof door leaf and the total energy absorption value per unit area under each combination, and verify whether both meet the required values of the explosion-proof door leaf. If the calculation results do not meet the required values of the explosion-proof door leaf, adjust the number of layers of the aluminum honeycomb panel, aluminum foil thickness, lattice side length, and / or height of the aluminum honeycomb panel until both meet the required values of the explosion-proof door leaf.

[0006] This technical solution is further configured such that, along the direction from the outer side to the inner side of the explosion-proof door leaf, multiple layers of aluminum honeycomb panels are arranged in the order of increasing honeycomb density, and the outer side of the explosion-proof door leaf is the side that contacts the external space.

[0007] This technical solution is further configured such that, in step S100, among two adjacent layers of aluminum honeycomb panels, the design value of the compressive strength of the high-density aluminum honeycomb panel is equal to the design value of the complete crushing strength of the low-density aluminum honeycomb panel, and the design value of the complete crushing strength is 1.2 times the compressive strength of this aluminum honeycomb panel; Among them, the required value of the compressive strength of the explosion-proof door leaf is used as the design value of the compressive strength of the outermost aluminum honeycomb panel.

[0008] This technical solution is further configured such that, in step S200, the compressive strength is in a direct proportional relationship with the aluminum foil thickness and in an inverse proportional relationship with the lattice side length; Assuming the aluminum foil thickness is a and the lattice side length is b, then the compressive strength .

[0009] This technical solution is further configured such that a partition is provided between adjacent layers of aluminum honeycomb panels; When the partition is made of a steel plate, its thickness is 2 times the maximum value of the aluminum foil thickness in two adjacent layers of aluminum honeycomb panels; When the partition is made of an aluminum plate, its thickness is 5 times the maximum value of the aluminum foil thickness in two adjacent layers of aluminum honeycomb panels.

[0010] This technical solution is further configured such that multiple layers of sequentially stacked aluminum honeycomb panels form the aluminum honeycomb core layer of the explosion-proof door leaf, the aluminum honeycomb core layer is arranged between two door panel layers, and connecting columns are arranged through the door panel layer and the honeycomb core layer; Based on the required value of the compressive strength of the explosion-proof door leaf, through model simulation force analysis, multiple combinations of the door panel layer thickness and the connecting column diameter are selected, and the optimal combination is determined based on weight and cost.

[0011] This technical solution is further configured such that a skin is provided between the aluminum honeycomb core layer and the door panel layer; The method for determining the thickness of the skin is as follows: when the door panel layer undergoes plastic deformation, the skin can completely withstand the shear force perpendicular to its body, and at the same time, its thickness is determined in combination with weight and cost.

[0012] This technical solution is further configured such that, in step S300, the total thickness of the explosion-proof door leaf is equal to the sum of the aluminum honeycomb core layer thickness, the door panel layer thickness, and the skin thickness.

[0013] This technical solution is further configured such that in step S300, the total energy that can be absorbed per unit area is equal to the sum of the energies that can be absorbed per unit area of each layer of aluminum honeycomb panels, and the energy that can be absorbed per unit area is in a proportional relationship with the height of the aluminum honeycomb panel; If the height of the aluminum honeycomb panel is set as h, then the energy that can be absorbed per unit area .

[0014] In a second aspect, the present invention provides an explosion-proof door leaf, which is made by using the above production process. The beneficial effects of the present invention are as follows: The aluminum honeycomb core layer is composed of multiple aluminum honeycomb panels with different honeycomb densities, which can fully absorb the explosion shock energy, prevent the further transmission of destructive energy, improve the explosion-proof performance, and have a passive protection energy absorption effect; using the aluminum honeycomb panel as the main material, it is high-strength and lightweight, facilitating installation and maintenance; it has good sound insulation performance; it is environmentally friendly and can be recycled and reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a block diagram of the production process flow of the explosion-proof door leaf in an embodiment of the present invention; Figure 2 is a schematic diagram of the explosion-proof door in an embodiment of the present invention; Figure 3 is an assembly schematic diagram of the connecting column, the door panel layer and the aluminum honeycomb core layer in an embodiment of the present invention; Figure 4 is Figure 2 a partial schematic diagram at position A in

[0016] In the drawings: 100, outer door panel layer; 200, aluminum honeycomb core layer; 201, low-density aluminum honeycomb panel; 202, medium-density aluminum honeycomb panel; 203, high-density aluminum honeycomb panel; 204, first skin; 205, second skin; 206, partition; 300, inner door panel layer; 400, U-shaped edge seal; 500, connecting column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by those of ordinary skill in the art without creative efforts shall all fall within the scope of protection of this application. In addition, the directional terms mentioned in the following embodiments, such as "upper", "lower", "left", "right", etc., are only with reference to the directions of the drawings. Therefore, the directional terms used are for illustration rather than to limit the present invention.

[0018] According to an embodiment of the present invention, a production process of an explosion-proof door leaf is provided. Please refer to Figure 1, the explosion-proof door leaf includes multiple layers of aluminum honeycomb panels stacked in sequence, and the honeycomb densities of the multiple layers of aluminum honeycomb panels are different; The production process includes the following steps: S100. Determine the compressive strength design values of each layer of aluminum honeycomb panel according to the required value of the compressive strength of the explosion-proof door leaf; S200. Based on the compressive strength design values, select various combinations of the aluminum foil thickness, lattice side length, and height of the aluminum honeycomb panel; S300. Calculate the total thickness of the explosion-proof door leaf and the total energy that can be absorbed per unit area under each combination, and verify whether both meet the required values of the explosion-proof door leaf. If the calculation results do not meet the required values of the explosion-proof door leaf, adjust the number of layers of the aluminum honeycomb panel, aluminum foil thickness, lattice side length, and / or height of the aluminum honeycomb panel until both meet the required values of the explosion-proof door leaf.

[0019] It should be noted that aluminum honeycomb panels with various different honeycomb densities form the aluminum honeycomb core layer, which can fully absorb the explosion shock energy, prevent the further transmission of destructive energy, improve the explosion-proof performance, and have a passive protection and energy absorption effect; using the aluminum honeycomb panel as the main material, it is high-strength and lightweight, facilitating installation and maintenance; good sound insulation performance: the aluminum honeycomb panel is in a vacuum environment during the preparation process, and there are many sealed lattices inside, and these lattices are in a vacuum state without a sound propagation medium; environmentally friendly and recyclable.

[0020] In the production process of the explosion-proof door leaf of this embodiment, please refer to Figure 1 , along the direction from the outside to the inside of the explosion-proof door leaf, the multiple layers of aluminum honeycomb panels are arranged in the order of increasing honeycomb density, and the outside of the explosion-proof door leaf is the side surface of the explosion-proof door leaf in contact with the external space.

[0021] Further, the door leaf can be set as a flat structure or an arc structure.

[0022] Further, the aluminum honeycomb panel can be set to 2 layers, 3 layers, 4 layers or even more layers, and the appropriate number of layers can be selected according to the thickness requirements, installation space, cost of the explosion-proof door leaf, and the required compressive strength of the explosion-proof door leaf.

[0023] Further, the greater the honeycomb density, the more impact energy it can absorb. Assuming that the aluminum foil thickness of the aluminum honeycomb panel is a and the honeycomb lattice side length is b, then the honeycomb density = 1.54 * a * 2.7 / b. Different aluminum honeycomb panels with different honeycomb densities can be obtained by adjusting the honeycomb lattice size and aluminum foil thickness.

[0024] In the production process of the explosion-proof door leaf of this embodiment, please refer to Figure 1, in step S100, in two adjacent layers of aluminum honeycomb panels, the design value of the compressive strength of the high-density aluminum honeycomb panel is equal to the design value of the complete crushing strength of the low-density aluminum honeycomb panel, and the design value of the complete crushing strength is 1.2 times the compressive strength of the aluminum honeycomb panel; Among them, the required value of the compressive strength of the explosion-proof door leaf is used as the design value of the compressive strength of the outermost aluminum honeycomb panel.

[0025] It should be noted that during the crushing process, the height of the aluminum honeycomb panel will become smaller and smaller, and the required crushing energy will become larger and larger. Through actual tests, the complete crushing strength of the aluminum honeycomb panel is 1.2 times its compressive strength. For example, if the compressive strength of an aluminum honeycomb panel with a certain density is 5 Mpa, then its complete crushing strength is 6 Mpa. Compared with the compressive strength, the complete crushing strength increases a certain safety factor for protection to meet the protection requirements.

[0026] Furthermore, the compressive strength is directly proportional to the thickness of the aluminum foil and inversely proportional to the lattice side length; Let the thickness of the aluminum foil be a and the lattice side length be b, then the compressive strength . At a specific compressive strength, different aluminum honeycomb panels can be obtained by adjusting the honeycomb lattice size and the thickness of the aluminum foil.

[0027] In the production process of the explosion-proof door leaf in this embodiment, please refer to Figure 1 , a partition is provided between adjacent layers of aluminum honeycomb panels; When the partition is made of a steel plate, its thickness is 2 times the maximum value of the aluminum foil thickness in two adjacent layers of aluminum honeycomb panels; When the partition is made of an aluminum plate, its thickness is 5 times the maximum value of the aluminum foil thickness in two adjacent layers of aluminum honeycomb panels.

[0028] Furthermore, the partition forms a reflection barrier to the shock wave, reducing the transmission rate of the shock wave, thereby reducing the impact damage of the shock wave. It can be made of a steel plate, an aluminum plate or other hard sheet materials that can meet the requirements of explosion-proof fragment invasion.

[0029] Specifically, the limiting requirements for two adjacent aluminum honeycomb panels with different densities: during the crushing energy absorption process of the aluminum honeycomb panel with a relatively low density among the two, it cannot affect the high-density aluminum honeycomb panel, and the compressive strength of the partition between the two can withstand the force generated during the crushing energy absorption process of the low-density aluminum honeycomb panel.

[0030] In the production process of the explosion-proof door leaf in this embodiment, please refer to Figure 1 , multiple layers of sequentially stacked aluminum honeycomb panels form the aluminum honeycomb core layer of the explosion-proof door leaf. The aluminum honeycomb core layer is arranged between two door panel layers, and connecting columns are arranged through the door panel layer and the honeycomb core layer; Based on the required value of the compressive strength of the explosion-proof door leaf, through model simulation and stress analysis, various combinations of the thickness of the door panel layer and the diameter of the connecting column are selected, and the optimal combination is determined based on weight and cost.

[0031] Specifically, the setting criterion for the lowest density is as follows: According to the compressive strength after the door panel layer and the connecting column are welded into a whole (this value is the required value of the compressive strength of the explosion-proof door leaf), as the compressive strength design value of the outermost aluminum honeycomb panel. According to the relationship between the compressive strength formula and the honeycomb density formula, the honeycomb density of this aluminum honeycomb panel can be obtained. By adjusting the size of the honeycomb lattice and the thickness of the aluminum foil, aluminum honeycomb cores of different specifications and sizes can be obtained at this density.

[0032] The setting criterion for the relatively high density is as follows: The fully crushed strength design value is equal to 1.2 times the compressive strength of the aluminum honeycomb panel. Based on this, according to the relationship between the compressive strength formula and the honeycomb density formula, the honeycomb density of this aluminum honeycomb panel can be obtained. By adjusting the size of the honeycomb lattice and the thickness of the aluminum foil, aluminum honeycomb cores of different specifications and sizes can be obtained at this density.

[0033] Among them, the selection of the aluminum foil thickness is limited by the availability of materials of this thickness on the market and the procurement cycle, while the size of the honeycomb lattice is mainly limited by the specifications of the mold. Considering cost, try to use existing molds for production. If there are other requirements, the mold can be remanufactured and processed, but this will lead to a higher production cost.

[0034] Specifically, the setting requirements for the number of layers of the aluminum honeycomb panel and the thickness of the door panel layer are as follows: Consider according to the use environment. One is that the scenario needs to absorb a certain amount of energy, the second is the space requirement of the use place, that is, the thickness requirement of the explosion-proof door leaf, and the third is the processing cost factor. For example, under the condition of limited space, it is required that the thickness of the explosion-proof door leaf is thinner. Thicker door panel layers and larger-diameter connecting columns need to be selected to improve the compressive strength, and the lowest density of the aluminum honeycomb panel will also change accordingly. Try to reduce the number of layers to meet the use requirements, and combine with the production cost factors to match the optimal combination of aluminum honeycomb panels with different densities.

[0035] In the production process of the explosion-proof door leaf in this embodiment, please refer to Figure 1 , a skin is provided between the aluminum honeycomb core layer and the door panel layer; The method for determining the thickness of the skin is as follows: When the door panel layer undergoes plastic deformation, the skin can completely withstand the shear force perpendicular to its body. At the same time, considering weight and cost, its thickness is determined, and the shear force is converted into pressure on the aluminum honeycomb core layer, and the aluminum honeycomb core layer is crushed by force to complete energy absorption.

[0036] Specifically, when determining the plastic deformation of the door panel layer, the minimum thickness required for the skin to fully withstand the shear force perpendicular to its body is determined; considering the weight and cost factors, the impact of skins with different thicknesses on the overall performance is evaluated; based on the evaluation results, the skin thickness that meets the shear force resistance requirements and achieves an optimized balance in terms of weight and cost is selected. Among them, determining the minimum thickness required for the skin to fully withstand the shear force perpendicular to its body is obtained by conducting simulation tests or experimental verifications to obtain data. It also includes conducting actual application tests based on the selected skin thickness to verify whether it can provide sufficient support and withstand the corresponding shear force when the door panel layer undergoes plastic deformation.

[0037] Furthermore, the skin can be made of steel plates, aluminum plates, or other hard sheet materials that can withstand the invasion of explosive fragments, and are welded together after sheet metal forming.

[0038] In the production process of the explosion-proof door leaf in this embodiment, please refer to Figure 1 , in step S300, the total thickness of the explosion-proof door leaf is equal to the sum of the thickness of the aluminum honeycomb core layer, the door panel layer, and the skin thickness.

[0039] In the production process of the explosion-proof door leaf in this embodiment, please refer to Figure 1 , in step S300, the total energy that can be absorbed per unit area is equal to the sum of the energy that can be absorbed per unit area of each layer of aluminum honeycomb board, and the energy that can be absorbed per unit area is in a proportional relationship with the height of the aluminum honeycomb board; Assuming the height of the aluminum honeycomb board is h, then the energy that can be absorbed per unit area .

[0040] According to an embodiment of the present invention, an explosion-proof door leaf is provided. Please refer to Figures 1 to 4 , which is made by using the above production process.

[0041] Furthermore, the explosion-proof door leaf includes an outer door panel layer 100, an aluminum honeycomb core layer 200, and an inner door panel layer 300. The outer door panel layer 100 is used to resist the invasion and damage of high-speed impact objects such as gravel and dust attached during an explosion. The aluminum honeycomb core layer 200 uses aluminum honeycomb boards with various different honeycomb densities as the load-bearing structure of the door leaf, and is used to resist and absorb the impact kinetic energy during the explosion. The outer door panel layer 100, the aluminum honeycomb core layer 200, and the inner door panel layer 300 are connected together by connecting columns 500 to form an integral structure, increasing the protection safety factor. The connection is not limited to welding, riveting, or bolt connection.

[0042] Specifically, the edge of the outer door panel layer 100 extends in a direction perpendicular to its body to wrap the aluminum honeycomb core layer 200 and the inner door panel layer 300; at the same time, at the hinge installation position, installation grooves are provided on the outer door panel layer 100, the aluminum honeycomb core layer 200, and the inner door panel layer 300, and a U-shaped edge seal 400 is provided in the installation grooves.

[0043] Specifically, along the direction from the outer door panel layer 100 to the inner door panel layer 300, the multi-layer aluminum honeycomb panels are arranged in the order of increasing honeycomb density. There are three layers of aluminum honeycomb panels, namely the low-density aluminum honeycomb 201, the medium-density aluminum honeycomb panel 202, and the high-density aluminum honeycomb panel 203. The low-density aluminum honeycomb panel 201 is welded to the first skin 204, and the high-density aluminum honeycomb panel 203 is welded to the second skin 205. Partition plates 206 are provided between the low-density aluminum honeycomb panel 201 and the medium-density aluminum honeycomb panel 202, and between the medium-density aluminum honeycomb panel 202 and the high-density aluminum honeycomb panel 203. Specific Embodiment 1: A certain place requires that the blast-resistant door leaf can withstand an explosion force of 5 Mpa. After exceeding 5 Mpa, the door leaf absorbs more than 600 KJ of explosion energy per square meter, and due to limited space, the overall thickness of the blast-resistant door leaf cannot exceed 140 mm. The design scheme is as follows: In view of the 5 Mpa explosion force, through model simulation analysis: the outer door panel layer and the inner door panel layer adopt plates with a thickness of 6 mm, and the connecting columns adopt bars with a diameter of 20 mm. Welding the two into a whole can withstand an explosion force of 5 Mpa.

[0045] According to the compressive strength calculation formula, the relationship between the aluminum foil thickness of the low-density aluminum honeycomb panel and the side length of the hexagonal lattice is obtained. The aluminum foil uses the common thickness on the market, and the specifications of the hexagonal lattice are made using existing molds to control the production cost as much as possible. The data of the existing molds are shown in Table 1.

[0046] Table 1: The density of the aluminum honeycomb panel is stratified into three densities: low, medium, and high. The low-density aluminum honeycomb panel is designed to have a compressive strength of 5 Mpa by controlling the size of the internal honeycomb lattice and the thickness of the aluminum foil that makes up the hexagonal lattice, and a complete crushing strength of 6 Mpa. Considering Table 1 and cost, an aluminum honeycomb panel with an aluminum foil thickness of 0.2 mm, a side length of the hexagonal lattice of 5.2 mm, and a height of 40 mm is selected. The effective crushing height of the aluminum honeycomb panel is 80% of the total height, and the energy absorbed per unit area is 160 KJ. Therefore, the low-density aluminum honeycomb panel can absorb at least 160 KJ of explosion energy per square meter. The compressive strength of the medium-density aluminum honeycomb panel is 6 Mpa, and the complete crushing strength is 7.2 Mpa. Similarly, considering cost, the thickness of the aluminum foil and the lattice size are selected. Assuming the height of this density aluminum honeycomb panel is 40 mm, the effective crushing height is 80% of the total height, and the energy absorbed per unit area is 192 KJ. Therefore, the medium-density aluminum honeycomb panel can absorb at least 192 KJ of explosion energy per square meter. The compressive strength of the high-density aluminum honeycomb panel is 7.2 Mpa, and the complete crushing strength is 8.6 Mpa. Similarly, considering cost, assuming the height is also 40 mm, the effective crushing height is 80% of the total height, and the energy absorbed per unit area is 275 KJ. It can absorb at least 275 KJ of explosion energy per square meter. The low, medium, and high-density aluminum honeycomb panels are brazed into a whole, and the three together can absorb 627 KJ of explosion energy, which is greater than the required 450 KJ. The thickness of the three-density aluminum honeycomb panel is 120 mm. The selected aluminum foil thickness is 0.2 mm, the partition is an aluminum plate with a thickness (5 times the aluminum foil thickness) of 1 mm; the thickness of the first skin and the second skin are both 1.5 mm, and the height is 40*3 + 1.5*2 + 1*2 = 125 mm; the thickness of the outer door panel layer and the inner door panel layer are both 6 mm, 125 + 6*2 = 137 mm, meeting the requirements. Specific Embodiment 2: A certain place requires that the anti-explosion door leaf can withstand an explosion force of 8 Mpa. After exceeding 8 Mpa, the door leaf absorbs more than 1000 KJ of explosion energy per square meter, and due to limited space, the overall thickness of the anti-explosion door leaf cannot exceed 200 mm. The design scheme is as follows: Considering the 8 Mpa explosion force, through model simulation analysis: The outer door panel layer and the inner door panel layer use plates with a thickness of 8 mm, and the connecting columns use rods with a diameter of 30 mm. Welding the two together can withstand an explosion force of 8 Mpa.

[0048] According to the compressive strength calculation formula, the relationship between the aluminum foil thickness and the side length of the hexagonal lattice of the low-density aluminum honeycomb panel is obtained. The aluminum foil selects common thicknesses on the market, and the specifications of the hexagonal lattice are made using existing molds to control the production cost as much as possible. The existing mold data are shown in Table 2.

[0049] Table 2: The density of the aluminum honeycomb panel is divided into two densities: low and high. The low-density aluminum honeycomb panel is designed to have a compressive strength of 8 Mpa and a complete crushing strength of 9.6 Mpa by controlling the size of the internal honeycomb lattice and the thickness of the aluminum foil that makes up the hexagonal lattice. Considering Table 2 and cost, an aluminum honeycomb panel with an aluminum foil thickness of 0.3 mm, a side length of 4.9 mm for the hexagonal lattice, and a height of 60 mm or 80 mm can meet the requirements. After further calculation for both schemes, the effective crushing height of the aluminum honeycomb panel is 80% of the total height. The energy that can be absorbed per unit area of the honeycomb panel with a height of 60 mm and 80 mm is 384 KJ and 512 KJ respectively. Therefore, each square meter of the two specifications of low-density aluminum honeycomb panels can absorb at least 384 KJ or 512 KJ of explosion energy. The compressive strength of the high-density aluminum honeycomb panel is 9.6 Mpa, and the complete crushing strength is 11.5 Mpa. Similarly, considering cost, it is assumed that only the specification with a height of 80 mm meets the requirements. The effective crushing height is 80% of the total height, and the energy that can be absorbed per unit area is 614 KJ. Each square meter can absorb at least 614 KJ of explosion energy. The low-density and high-density aluminum honeycomb panels are brazed into a whole, and the total energy that can be absorbed is 998 KJ or 1126 KJ of explosion energy. Among them, the combination of the low-density honeycomb panel with a height of 60 mm and the high-density panel is less than the required 1000 KJ. Therefore, the combination scheme of the 60-mm low-density honeycomb panel is excluded. The thickness of the two-density aluminum honeycomb panel is 160 mm. The selected aluminum foil thickness is 0.3 mm, and the partition is an aluminum plate with a thickness (5 times the aluminum foil thickness) of 1.5 mm; the thickness of the first skin and the second skin is both 5 mm, and the height is 160 + 1.5 + 5 * 2 = 171.5 mm; the thickness of the outer door panel layer and the inner door panel layer is both 8 mm, and 171.5 + 8 * 2 = 187.5 mm, which meets the requirements.

[0050] The above has described the present invention in detail. As mentioned above, it is only the preferred embodiment of the present invention, and it cannot limit the scope of implementation of the present invention. That is, all equal changes and modifications made according to the scope of this application should still fall within the scope covered by the present invention.

Claims

1. An explosion-proof door leaf production process, characterized in that, The explosion-proof door leaf includes multiple layers of aluminum honeycomb panels stacked in sequence, and the honeycomb densities of the multiple layers of aluminum honeycomb panels are different; The production process includes the following steps: S100. Determine the compressive strength design values of each layer of aluminum honeycomb panel according to the required value of the compressive strength of the explosion-proof door leaf; S200. Based on the compressive strength design values, select various combinations of the aluminum foil thickness, lattice side length, and height of the aluminum honeycomb panel; S300. Calculate the total thickness of the explosion-proof door leaf and the total energy absorption value per unit area under each combination, and verify whether both meet the required values of the explosion-proof door leaf. If the calculation results do not meet the required values of the explosion-proof door leaf, adjust the number of layers of aluminum honeycomb panels, aluminum foil thickness, lattice side length, and / or height of the aluminum honeycomb panel until both meet the required values of the explosion-proof door leaf.

2. The production process of an explosion-proof door leaf according to claim 1, characterized in that, Along the direction from the outside to the inside of the explosion-proof door leaf, the multiple layers of aluminum honeycomb panels are arranged in the order of increasing honeycomb density. The outside of the explosion-proof door leaf is the side that contacts the external space.

3. The production process of an explosion-proof door leaf according to claim 2, characterized in that, In step S100, among two adjacent layers of aluminum honeycomb panels, the compressive strength design value of the high-density aluminum honeycomb panel is equal to the complete crushing strength design value of the low-density aluminum honeycomb panel, and the complete crushing strength design value is 1.2 times the compressive strength of the aluminum honeycomb panel; Among them, the required value of the compressive strength of the explosion-proof door leaf is used as the compressive strength design value of the outermost honeycomb panel.

4. A production process of an explosion-proof door leaf according to claim 1, characterized in that, In step S200, the compressive strength is in a direct proportional relationship with the aluminum foil thickness, and the compressive strength is in an inverse proportional relationship with the lattice side length; Set the aluminum foil thickness as a and the lattice side length as b, then the compressive strength .

5. A production process of an explosion-proof door leaf according to claim 1, characterized in that, A partition is provided between adjacent layers of aluminum honeycomb panels; When the partition is made of a steel plate, its thickness is 2 times the maximum value of the aluminum foil thickness in two adjacent layers of aluminum honeycomb panels; When the partition is made of an aluminum plate, its thickness is 5 times the maximum value of the aluminum foil thickness in two adjacent layers of aluminum honeycomb panels.

6. The production process of an explosion-proof door leaf according to claim 5, characterized in that, The multiple layers of aluminum honeycomb panels stacked in sequence form the aluminum honeycomb core layer of the explosion-proof door leaf. The aluminum honeycomb core layer is arranged between two door panel layers, and connecting columns are penetrated between the door panel layer and the honeycomb core layer; Based on the required value of the compressive strength of the explosion-proof door leaf, through model simulation stress analysis, select various combinations of the door panel layer thickness and the connecting column diameter, and determine the optimal combination based on weight and cost.

7. The production process of an explosion-proof door leaf according to claim 6, characterized in that, A skin is provided between the aluminum honeycomb core layer and the door panel layer; The method for determining the thickness of the skin is as follows: when the door panel layer undergoes plastic deformation, the skin can completely withstand the shear force perpendicular to its body, and at the same time, determine its thickness in combination with weight and cost.

8. A production process for an explosion-proof door leaf according to claim 7, characterized in that, In step S300, the total thickness of the explosion-proof door leaf is equal to the sum of the thickness of the aluminum honeycomb core layer, the door panel layer, and the skin.

9. A production process of an explosion-proof door leaf according to claim 4, characterized in that, In step S300, the total energy absorption value per unit area is equal to the sum of the energy absorption per unit area of each layer of aluminum honeycomb panel, and the energy absorption per unit area is in a direct proportional relationship with the height of the aluminum honeycomb panel; Set the height of the aluminum honeycomb panel as h, then the energy that can be absorbed per unit area .

10. An explosion-proof door leaf, characterized in that, It is made by using the production process according to any one of claims 1-9.

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