Light composite structure anti-knock door

Abstract

The utility model belongs to the technical field of anti-knock doors, and discloses a light composite structure anti-knock door which comprises a door frame and a door leaf which are hinged through hinges, the door leaf comprises two steel plates, the plate faces of the two steel plates are arranged in parallel at intervals, aluminum plates are arranged on the inner sides of the two steel plates, and a honeycomb aluminum interlayer is arranged between the two aluminum plates. The steel plates are arranged on the two sides to serve as the face plates, the aluminum plates are arranged in the steel plates to serve as the base plates of the honeycomb aluminum interlayer, then the honeycomb aluminum interlayer is arranged to serve as the core material of the whole door leaf, and by means of the honeycomb structure, on one hand, shock waves generated by explosion can be effectively absorbed and buffered, and on the other hand, the weight of the door leaf can be greatly reduced; therefore, light weight is realized while excellent anti-knock performance is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof doors, in particular to an explosion-proof door with a light composite structure. Background Art

[0002] Explosion-proof doors are protective equipment that have a certain degree of protection against explosion damage. They are designed to resist various deliberate destructive and accidental explosion shock waves and effectively prevent the spread of explosion hazards, protecting the lives of people and the integrity of property. Explosion-proof doors generally need to be analyzed and designed according to the protection requirements, made of suitable materials, and equipped with high-performance hardware accessories to meet safety and use requirements. Existing explosion-proof doors are generally made of steel, with a single material form, weak structural connection structure, and heavy weight, which is time-consuming and labor-intensive during handling, transportation, and installation.

[0003] A Chinese invention patent with publication number CN115749548A discloses a lightweight lattice sandwich structure explosion-proof door, which optimizes the lattice sandwich structure layout and is integrally injection molded with a specially formulated polymer filling material according to certain process requirements, and has excellent properties such as high bearing capacity, light weight, and good explosion-proof performance. The door leaf is rectangular and made of a lattice sandwich structure. The metal shell of the lattice sandwich structure is a metal shell with parallel upper and lower panels; the lattice support element is composed of multiple components arranged in a lattice space; the lattice support element is fixed between the upper and lower panels of the metal shell; each component is supported between the upper and lower panels of the metal shell. Polymer is filled between the lattice support element and the metal shell.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: the above-mentioned explosion-proof door is integrally injection-molded using polymer filling materials according to certain process requirements, and metal shells are used as panels on both sides. Although the weight of the explosion-proof door is reduced to a certain extent, the above-mentioned structure will produce delamination under the action of the explosion shock wave, affecting its explosion-proof performance. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a light composite structure explosion-proof door.

[0006] The above technical purpose of the utility model is achieved through the following technical scheme: a lightweight composite explosion-proof door, including a door frame and a door leaf hingedly connected by hinges, the door leaf including two steel plates arranged in parallel and spaced apart, aluminum plates are arranged on the inner sides of the two steel plates, and a honeycomb aluminum interlayer is arranged between the two aluminum plates.

[0007] By adopting the above technical solution, steel plates are arranged on both sides as panels, aluminum plates are arranged inside the steel plates as substrates of honeycomb aluminum interlayers, and the honeycomb aluminum interlayers are arranged as the core material of the entire door leaf. The honeycomb structure can effectively absorb and buffer the shock waves generated by the explosion on the one hand, and can greatly reduce the weight of the door leaf on the other hand, thereby achieving lightweight while ensuring excellent explosion-proof performance.

[0008] Furthermore, the aluminum plate is provided with a plurality of through holes at intervals, and rivet holes are provided on the steel plate at corresponding positions of the through holes. The rivets pass through the rivet holes, the through holes, the honeycomb holes of the honeycomb aluminum interlayer, the through holes, and the rivet holes in sequence, and the two ends of the rivets are respectively placed in the rivet holes of the two steel plates and welded and fixed to the corresponding steel plates.

[0009] By adopting the above technical scheme, rivet holes and through holes are respectively opened on the steel plate and the aluminum plate, and then rivets are used to pass through the rivet holes, through holes, honeycomb holes of the honeycomb aluminum interlayer, through holes, and rivet holes in sequence to connect the five-layer structure. Finally, the rivet ends are welded to the steel plates protruding from the rivet holes, so that the various layers of the structure are tightly connected together, which can effectively prevent the door leaf from cracking under the action of explosive loads and improve the overall stiffness and resistance of the explosion-proof door.

[0010] Furthermore, the honeycomb aluminum interlayer is in the shape of a regular hexagonal honeycomb as a whole, the side length of the honeycomb hole is 5 mm, and the wall thickness between adjacent honeycomb holes is 0.5 mm.

[0011] By adopting the above technical solution, the side length of the honeycomb holes of the honeycomb aluminum interlayer is set to 5 mm, and the wall thickness between adjacent honeycomb holes is set to 0.5 mm, so that the explosion-proof performance and shock wave absorption and buffering capacity of the explosion-proof door are best.

[0012] Furthermore, the thickness of the steel plate is 6 mm, the thickness of the aluminum plate is 6 mm, and the thickness of the honeycomb aluminum interlayer is 66 mm, 76 mm, or 106 mm.

[0013] By adopting the above technical solution, a 6mm steel plate is used as the surface layer to ensure the stability of the overall structure, and a 6mm thick aluminum plate, a 66mm or 76mm or 106mm thick honeycomb aluminum interlayer is arranged to resist different levels of explosion shock waves.

[0014] In summary, the utility model has the following beneficial effects:

[0015] 1. In the present application, steel plates are arranged on both sides as panels, aluminum plates are arranged inside the steel plates as substrates of honeycomb aluminum interlayers, and the honeycomb aluminum interlayers are arranged as the core material of the entire door leaf. The honeycomb structure can effectively absorb and buffer the shock waves generated by the explosion on the one hand, and can greatly reduce the weight of the door leaf on the other hand, thereby achieving lightweight while ensuring excellent explosion-proof performance.

[0016] 2. In the present application, rivet holes and through holes are respectively opened on the steel plate and the aluminum plate, and then rivets are used to sequentially pass through the rivet holes, through holes, honeycomb holes of the honeycomb aluminum interlayer, through holes, and rivet holes to connect the five-layer structure, and finally the rivet ends are welded to the steel plates protruding from the rivet holes, so that the various layers of the structure are tightly connected together, which can effectively prevent the door leaf from cracking under the action of explosive loads and improve the overall stiffness and resistance of the explosion-resistant door. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0018] Figure 2 It is an exploded schematic diagram of the door leaf structure of an embodiment of the utility model.

[0019] In the figure: 10, hinge; 20, door frame; 30, door leaf; 31, steel plate; 32, aluminum plate; 33, honeycomb aluminum interlayer; 34, through hole; 35, rivet hole; 36, rivet. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0021] like Figure 1-2 As shown, the embodiment of the present application discloses a light composite explosion-proof door, including a door frame 20 and a door leaf 30, the door frame 20 and the door leaf 30 are hingedly connected by a hinge 10, so that the door leaf 30 can be opened and closed relative to the door frame 20. A locking mechanism is provided on the side of the door frame 20 and the door leaf 30 away from the hinge 10, for realizing the locking of the explosion-proof door.

[0022] The door leaf 30 in the embodiment of the present application is a five-layer structure, which includes a steel plate 31, an aluminum plate 32, a honeycomb aluminum interlayer 33, an aluminum plate 32, and a steel plate 31. The plate surfaces of the two steel plates 31 arranged on both sides are arranged in parallel and spaced apart. Using the steel plate 31 as the surface layer can effectively ensure the stability and mechanical processing performance of the entire door leaf 30 structure. An aluminum plate 32 is arranged on the inner side of each of the two steel plates 31. While ensuring the structural strength, it can be used as a substrate for the honeycomb aluminum interlayer 33, that is, the honeycomb aluminum interlayer 33 is sandwiched between the two aluminum plates 32, which is convenient for welding the honeycomb aluminum interlayer 33. The two aluminum plates 32 can also disperse the load of the honeycomb aluminum interlayer 33 being compressed on different surfaces, so that as many honeycomb hole structures as possible are stressed at the same time. The honeycomb aluminum interlayer 33 uses brazing to connect the aluminum core materials together in a honeycomb shape, and the structure is stable. While ensuring the structural strength, the weight of the structure can be greatly reduced.

[0023] In order to achieve the connection between the five-layer structure, a number of through holes 34 are provided on the aluminum plate 32 at intervals, and rivet holes 35 are provided on the steel plate 31 at positions corresponding to the through holes 34. Then, rivets 36 are sequentially passed through the rivet holes 35, through holes 34, honeycomb holes of the honeycomb aluminum interlayer 33, through holes 34, and rivet holes 35. The two ends of the rivet 36 are respectively placed in the rivet holes 35 of the steel plates 31 on both sides, and the ends of the rivets 36 are welded and fixed to the steel plates 31 at the corresponding side rivet holes 35 by welding. The steel plate 31, the aluminum plate 32, and the honeycomb aluminum interlayer 33 can be firmly connected into one by double-sided rivet welding, which can effectively prevent the door leaf 30 from cracking under the action of explosion load and improve the overall stiffness and resistance of the explosion-proof door. During welding, the height of the welds on both sides of the double-sided rivet welding is not less than 6 mm, and the compressive strength of the skew surface (parallel to the direction of the honeycomb holes) is not less than 25 MPa, so as to ensure that the welding is tight and the connection is stable.

[0024] In this embodiment, based on the split Hopkinson bar (SHPB) test and the explosion test, the honeycomb shape of the honeycomb aluminum interlayer 33 is designed to be a regular hexagon, the side length of the honeycomb hole is 5 mm, and the wall thickness between adjacent honeycomb holes is 0.5 mm, which has achieved the best explosion resistance and deformation energy absorption effect.

[0025] Furthermore, the thickness of the steel plate 31 is 6 mm, the thickness of the aluminum plate 32 is 6 mm, and the thickness of the honeycomb aluminum interlayer 33 is 66 mm, 76 mm, or 106 mm. When the thickness of the honeycomb aluminum interlayer 33 is 66 mm, it can resist an explosion shock wave of 1000 kPa; when the thickness of the honeycomb aluminum interlayer 33 is 76 mm, it can resist an explosion shock wave of 2000 kPa; when the thickness of the honeycomb aluminum interlayer 33 is 106 mm, it can resist an explosion shock wave of 3000 kPa. Compared with traditional explosion-proof doors of the same explosion-proof grade, the weight of the explosion-proof door made using the structure of this embodiment is only 70% of the weight of the traditional explosion-proof door, achieving the goal of reducing weight by 30%.

[0026] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A lightweight composite explosion-proof door, comprising a door frame (20) and a door leaf (30) hingedly connected by a hinge (10), characterized in that: The door leaf (30) comprises two steel plates (31) whose plate surfaces are arranged in parallel and at intervals, an aluminum plate (32) is arranged inside the two steel plates (31), and a honeycomb aluminum interlayer (33) is arranged between the two aluminum plates (32).

2. The light composite explosion-proof door according to claim 1 is characterized in that: The aluminum plate (32) is provided with a plurality of through holes (34) at intervals, and rivet holes (35) are provided on the steel plate (31) at positions corresponding to the through holes (34). The rivet (36) passes through the rivet hole (35), the through hole (34), the honeycomb hole of the honeycomb aluminum interlayer (33), the through hole (34), and the rivet hole (35) in sequence, and the two ends of the rivet (36) are respectively placed in the rivet holes (35) of the two steel plates (31) and are welded and fixed to the corresponding steel plates (31).

3. The light composite explosion-proof door according to claim 1 is characterized by: The honeycomb aluminum interlayer (33) is in the shape of a regular hexagonal honeycomb as a whole, the side length of the honeycomb hole is 5 mm, and the wall thickness between adjacent honeycomb holes is 0.5 mm.

4. The light composite explosion-proof door according to claim 2 is characterized by: The thickness of the steel plate (31) is 6 mm, the thickness of the aluminum plate (32) is 6 mm, and the thickness of the honeycomb aluminum interlayer (33) is 66 mm, 76 mm, or 106 mm.

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