An explosion door body and a preparation method thereof

Abstract

The application relates to an explosion-proof door body and a preparation method thereof. The explosion-proof door body comprises a door core assembly and opposite first and second face plates, the door core assembly is located between the first and second face plates and is fixedly connected with the first and second face plates, the door core assembly comprises a frame and a plurality of first and second core plates connected with the frame, the plurality of first and second core plates are located in a space enclosed by the frame and are connected in a plug-in mode to form a plurality of ring-shaped units. In the technical scheme disclosed in the application, the first and second core plates are integrally formed and connected in a plug-in mode to form a plurality of connected ring-shaped units similar to a honeycomb, and the ring-shaped units are fixedly connected without welding, so that the overall strength of the door core is significantly increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of explosion-proof, in particular to an explosion-proof door body and a preparation method thereof. BACKGROUND

[0002] At present, the people's air defense works is an important place for sheltering personnel, preserving materials, and protecting the safety of people's lives and property in wartime, and the engineering port is a weak link of the engineering and a key attack site.

[0003] The explosion-proof door body, as an extremely important part of the people's air defense works, is an important equipment for protecting the people's air defense works port, and bears the important responsibility of protecting the safety of internal personnel and equipment. The structural strength and resistance performance of the explosion-proof door body are usually determined by the design strength and reliability of the door body.

[0004] The current explosion-proof door body is divided into two types according to the material structure, which are reinforced concrete explosion-proof door body and steel structure explosion-proof door body. Both of the two types of explosion-proof door bodies adopt a sandwich structure design, which is composed of two door panel and an internal core. Among them, the specific gravity of the internal material of the reinforced concrete explosion-proof door body is large, which leads to a large weight of the door panel, and further leads to problems such as being not conducive to production, transportation and installation. The steel structure explosion-proof door body adopts hot-rolled "I" shaped steel as the "I" shaped skeleton, in order to meet the resistance requirement, thicker I-shaped steel is often used, which lacks scientific design, and also has problems such as material waste, heavy door body, and the like, making it difficult to transport, install and maintain.

[0005] In view of the above situation, the present application provides an explosion-proof door body and a preparation method thereof, so as to reduce the weight of the door body while ensuring the resistance performance of the door body. SUMMARY

[0006] In order to reduce the weight of the door body while ensuring the resistance performance of the door body, the present application provides an explosion-proof door body and a preparation method thereof.

[0007] In the first aspect, the present application provides an explosion-proof door body, which adopts the following technical scheme:

[0008] An explosion-proof door body, comprising a door core assembly, and a first panel and a second panel opposite to each other, the door core assembly is located between the first panel and the second panel and is fixedly connected with the first panel and the second panel;

[0009] Among them, the door core assembly comprises a frame, and a plurality of first core plates and a plurality of second core plates connected with the frame, the plurality of first core plates and the plurality of second core plates are located in the space enclosed by the frame and are connected in a plug-in manner to form a plurality of ring units.

[0010] By adopting the technical scheme, the first core plate and the second core plate are connected in a plug-in manner to form the door core assembly main body similar to the honeycomb-shaped door core assembly main body, and the first core plate and the second core plate are integrally formed and then are plugged and fixed, so that the multiple ring units are connected without welding, and the strength is significantly increased.

[0011] In addition, it is worth noting that, since the first core plate and the second core plate form the multiple ring units in a plug-in manner, the strength of the ring units can be changed by changing the spacing and thickness of the core plates, so that different door body design requirements can be met, and compared with the scheme in which the multiple ring units are connected by welding, the scheme is more flexible and is less likely to cause size deviation and other problems.

[0012] Optionally, one side of the first core plate is provided with multiple first insertion slots arranged at intervals in a first direction, and one side of the second core plate is provided with multiple second insertion slots arranged at intervals in a second direction, and the first direction and the second direction have a preset included angle.

[0013] By adopting the technical scheme, the insertion slots on the first core plate and the second core plate are plugged and connected with each other to form the ring units.

[0014] Optionally, the frame is a rectangular frame, and the rectangular frame includes a first frame edge for being connected with a pivoting mechanism for installing the explosion-proof door body and a second frame edge opposite to the first frame edge.

[0015] According to a preset distance threshold relative to a midpoint of a length extension direction of the second frame edge, a region covered by the multiple ring units is divided into a near region adjacent to the midpoint and a far region outside the near region, and the distribution density of the multiple ring units in the near region and the far region is the same.

[0016] Optionally, the frame is a rectangular frame, and the rectangular frame includes a first frame edge for being connected with a pivoting mechanism for installing the explosion-proof door body and a second frame edge opposite to the first frame edge.

[0017] According to a preset distance threshold relative to a midpoint of a length extension direction of the second frame edge, a region covered by the multiple ring units is divided into a near region adjacent to the midpoint and a far region outside the near region, and the distribution density of the multiple ring units in the near region is greater than the distribution density of the multiple ring units in the far region.

[0018] By adopting the technical scheme, when the door body bears a nuclear explosion load, the stress is not uniform due to the influence of the shape and boundary conditions of the door body. In actual situations, the maximum deformation often occurs at the midpoint of the free edge of the door body. Therefore, by increasing the density of the ring-shaped units, local reinforcement is performed at the maximum deformation position, and local reduction is performed at the position with smaller deformation, so that the material is used more efficiently, the door body is lightened while the anti-explosion performance of the door body is ensured, and the door body is truly lightweight and high-strength.

[0019] Optionally, the ring-shaped units are rectangular units, the plurality of first core plates are arranged at equal intervals along a direction perpendicular to the first direction, and the plurality of second core plates are arranged at equal intervals along a direction perpendicular to the second direction.

[0020] Optionally, the first direction is perpendicular to the length extension direction of the second frame, the second direction is parallel to the length extension direction of the second frame, and the ring-shaped units are rectangular units.

[0021] The plurality of first core plates are arranged at unequal intervals along a direction perpendicular to the first direction, wherein the interval distance of the plurality of first core plates in the proximal region is smaller than the interval distance of the plurality of first core plates in the distal region; and / or

[0022] The plurality of second core plates are arranged at unequal intervals along a direction perpendicular to the second direction, wherein the interval distance of the plurality of second core plates in the proximal region is smaller than the interval distance of the plurality of second core plates in the distal region.

[0023] By adopting the technical scheme, when the door body bears a nuclear explosion load, the stress is not uniform due to the influence of the shape and boundary conditions of the door body. In actual situations, the maximum deformation often occurs at the midpoint of the free edge of the door body. Therefore, by increasing the density of the ring-shaped units, local reinforcement is performed at the maximum deformation position, and local reduction is performed at the position with smaller deformation, so that the material is used more efficiently, the door body is lightened while the anti-explosion performance of the door body is ensured, and the door body is truly lightweight and high-strength.

[0024] Optionally, the first core plate is a cuboid, has a first major edge parallel to the first direction and a first minor edge perpendicular to the first major edge and the depth direction of the first slot, and the lengths of the first minor edges of the plurality of first core plates are the same; and

[0025] The second core plate is a cuboid, has a second major edge parallel to the second direction and a second minor edge perpendicular to the second major edge and the depth direction of the second slot, and the lengths of the second minor edges of the plurality of second core plates are the same.

[0026] Optionally, the first core plate is a cuboid, and the first core plate has a first major edge parallel to the first direction and a first minor edge perpendicular to both the first major edge and the depth direction of the first slot, wherein a first group of the first core plates has a partial section located in the proximal region, a second group of the first core plates has a full section located in the distal region, and the length of the first minor edge of the first group of the first core plates is greater than the length of the first minor edge of the second group of the first core plates; and / or

[0027] The second core plate is a cuboid, and the second core plate has a second major edge parallel to the second direction and a second minor edge perpendicular to both the second major edge and the depth direction of the second slot, wherein a first group of the second core plates has a partial section located in the proximal region, a second group of the second core plates has a full section located in the distal region, and the length of the second minor edge of the first group of the second core plates is greater than the length of the second minor edge of the second group of the second core plates.

[0028] By adopting the above technical solutions, when the door body bears a nuclear explosion load, the stress is not uniform due to the shape of the door body and the boundary conditions. In actual situations, the maximum deformation often occurs at the midpoint of the free edge of the door body. Therefore, by increasing the length of the first major edge and the second minor edge of the core plate, local reinforcement is performed at the place of maximum deformation, and local reduction is performed at the place of smaller deformation, thereby achieving more efficient use of materials, ensuring the resistance performance of the explosion-proof door body, and realizing weight reduction of the door body, and truly achieving lightweight and high strength. The gradient value of the length of the first major edge and the second minor edge can be adjusted, and can be set according to different resistance levels and specific production conditions, so that the adaptability is strong, and the designability is improved.

[0029] Optionally, the opening direction of the plurality of first slots and the plurality of second slots is towards the inside of the space enclosed by the frame, and the plurality of first slots and the plurality of second slots are inserted together in a one-to-one correspondence to form the plurality of ring-shaped units.

[0030] In a second aspect, the application provides a preparation method of an explosion-proof door body, comprising the following steps:

[0031] providing a plurality of core plate blanks, and opening a plurality of slots on one side of the core plate blank to obtain a plurality of first core plates and a plurality of second core plates;

[0032] aligning the slots of the plurality of first core plates and the plurality of second core plates with each other and inserting them together in a one-to-one correspondence to form a combination body having a plurality of ring-shaped units;

[0033] The preformed frame is provided, and the combination is connected with the frame and located in the space enclosed by the frame to form a door core assembly.

[0034] The first panel and the second panel are provided, and the door core assembly is fixedly connected with the first panel and the second panel and located between the first panel and the second panel to form the explosion-proof door body.

[0035] In summary, the present application has at least one of the following beneficial technical effects:

[0036] 1. The first core plate and the second core plate are connected in a plug-in manner to form a door core assembly main body similar to a honeycomb shape with multiple ring units connected, and since the first core plate and the second core plate are integrally formed and then plugged and fixed, the multiple ring units do not need to be fixedly connected by welding, so that the strength is significantly increased.

[0037] 2. The strength of the ring unit formed by the core plate can be changed by changing the spacing of the core plate, the length of the first width edge and the second width edge, etc., thereby meeting different door body design requirements. Compared with the scheme in which multiple scattered ring units are connected by welding, the present scheme is more flexible and is less likely to have size deviation and other problems. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is an explosion schematic diagram of an explosion-proof door body in an embodiment of the present application.

[0039] Figure 2 is a partial schematic diagram of a first core plate and a second core plate in an explosion-proof door body in an embodiment of the present application. Figure 1 .

[0040] Figure 3 is a partial schematic diagram of a first core plate and a second core plate in an explosion-proof door body in an embodiment of the present application. Figure 2 .

[0041] Figure 4 is a partial schematic diagram of a first core plate and a second core plate in an explosion-proof door body in an embodiment of the present application. Figure 3 .

[0042] Figure 5 is a schematic diagram of S1 step of a preparation method of an explosion-proof door body in an embodiment of the present application.

[0043] Figure 6 is a schematic diagram of S2 step of a preparation method of an explosion-proof door body in an embodiment of the present application.

[0044] Figure 7 is a schematic diagram of S3 step of a preparation method of an explosion-proof door body in an embodiment of the present application.

[0045] Figure 8 is a schematic diagram of S4 step of a preparation method of an explosion door body in the embodiment of the present application.

[0046] Explanation of reference signs:

[0047] 1, door core assembly; 11, first core plate; 12, second core plate; 13, frame; 14, slot; 15, ring unit; 2, first panel; 3, second panel. DETAILED DESCRIPTION

[0048] The present application will be further described below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are intended to be merely exemplary of the application and not intended to limit the application.

[0049] In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the inventive concept. As part of the description, some of the diagrams in the present disclosure represent structures and devices in block diagram form in order to avoid obscuring the concepts of the present disclosure. Not all features of a practical implementation are necessarily described or implied. A reference to “one implementation” or “an implementation” in the present disclosure means that a particular feature, structure, or characteristic described in connection with the implementation is included in at least one implementation, and the multiple references to “one implementation” or “an implementation” should not necessarily be interpreted as an identical implementation unless explicitly so defined.

[0050] The terms “a,” “an,” and “the” are not intended to refer to singular entities unless explicitly defined as such, but include the general class of which a specific example can be used for illustration. Thus, the use of the term “a” or “an” can mean any number of including “one,” “one or more,” “at least one,” and “one or more than one.” The term “or” means any one of the alternatives, as well as any combination of the alternatives, including all of the alternatives, unless the alternatives are explicitly indicated to be mutually exclusive. The phrase “at least one of” in combination with a list of items means that the list of items can be a single item or any combination of the items in the list. The phrase does not require all of the listed items, unless explicitly so limited.

[0051] The embodiment of the present application discloses an explosion door body. Referring to Figure 1 An explosion door body includes a door core assembly 1, and opposite first and second panels 2 and 3. The door core assembly 1 serves as the main part of the door body and plays a major supporting role, and the first and second panels 2 and 3 serve as the blast surface and the non-blast surface, respectively.

[0052] Specifically, the door core assembly 1 is located between and fixedly connected with the first panel 2 and the second panel 3. The door core assembly 1 comprises a frame 13 and a plurality of first core plates 11 and a plurality of second core plates 12 connected with the frame 13. The frame 13 is used to enclose a space for placing the plurality of first core plates 11 and the plurality of second core plates 12, and the plurality of first core plates 11 and the plurality of second core plates 12 are located in the space enclosed by the frame 13 and connected in a plug-in manner to form a plurality of ring-shaped units 15.

[0053] Further, the first core plate 11 and the second core plate 12 are connected in a plug-in manner to form a honeycomb-like door core assembly 1 main body. Since the first core plate 11 and the second core plate 12 are integrally formed and then connected in a plug-in manner, the plurality of ring-shaped units 15 are not connected by welding, which significantly increases the strength.

[0054] Correspondingly, since the first core plate 11 and the second core plate 12 form the plurality of ring-shaped units 15 in a plug-in manner, the strength of the ring-shaped units 15 can be changed by changing the spacing of the core plates, the length of the first and second side edges, and the like, thereby meeting different door design requirements. Compared with the scheme in which the plurality of ring-shaped units 15 are connected by welding, the present scheme is more flexible and less likely to have size deviation and other problems.

[0055] Specifically, the first core plate 11 has a plurality of first insertion slots 14 arranged at intervals in a first direction on one side, and the second core plate 12 has a plurality of second insertion slots 14 arranged at intervals in a second direction on one side. The first direction and the second direction have a preset included angle. The insertion slots 14 on the first core plate 11 and the second core plate 12 are plugged into each other, thereby enclosing the ring-shaped units 15.

[0056] Further, the opening directions of the plurality of first insertion slots 14 and the plurality of second insertion slots 14 are both towards the inside of the space enclosed by the frame 13, and the plurality of first insertion slots 14 and the plurality of second insertion slots 14 are plugged into each other in a one-to-one correspondence to form the plurality of ring-shaped units 15.

[0057] In different embodiments, the frame 13 can have different shapes as long as it can enclose a space for placing the plurality of first core plates 11 and the plurality of second core plates 12. For example, in the present embodiment, the frame 13 is a rectangular frame 13, which comprises a first side frame for connecting with a pivoting mechanism for mounting an explosion-proof door body and a second side frame opposite to the first side frame.

[0058] For the scheme of the rectangular frame 13, for the above-mentioned ring-shaped unit 15, according to a preset distance threshold relative to the midpoint of the length extension direction of the second frame, the area covered by the plurality of ring-shaped units 15 is divided into a near area adjacent to the midpoint and a far area outside the near area, and the distribution density of the plurality of ring-shaped units 15 in the near area and the far area can be the same or different.

[0059] It is worth noting that the above-mentioned preset distance threshold can be determined by the percentage threshold of the distance from the first frame to the second frame. As an example, the above-mentioned preset distance threshold can be in the range of 20%-50% of the distance between the first frame and the second frame. Specifically, the above-mentioned preset distance threshold can be 30% of the distance between the first frame and the second frame.

[0060] As an example, the distribution density of the plurality of ring-shaped units 15 in the near area is greater than the distribution density of the plurality of ring-shaped units 15 in the far area. When the door body bears the nuclear blast load, the stress is not uniform due to the shape of the door body and the boundary conditions. In actual cases, the maximum deformation often occurs at the midpoint of the free edge of the door body. Therefore, by increasing the density of the ring-shaped units 15 at the maximum deformation, local strengthening is achieved, and local reduction is achieved in the place where the deformation is small, realizing more efficient use of materials, while ensuring the anti-explosion performance of the door body, realizing the weight reduction of the door body, and truly achieving lightweight and high strength.

[0061] Further, in different embodiments, the above-mentioned ring-shaped unit 15 can be of different shapes. As an example, in the present embodiment, the ring-shaped unit 15 is a rectangular unit.

[0062] For the above-mentioned scheme, in the case where the above-mentioned ring-shaped unit 15 is a rectangular unit, in different embodiments, the plurality of first core plates 11 and the plurality of second core plates 12 can be arranged in different ways. As an example one, the plurality of first core plates 11 are arranged at equal intervals along a direction perpendicular to the first direction, and the plurality of second core plates 12 are arranged at equal intervals along a direction perpendicular to the second direction.

[0063] As an example two, the plurality of first core plates 11 are arranged at unequal intervals along a direction perpendicular to the first direction, wherein the interval distance of the plurality of first core plates 11 in the near area is less than the interval distance of the plurality of first core plates 11 in the far area. Similarly, optionally, the plurality of second core plates 12 are arranged at unequal intervals along a direction perpendicular to the second direction, wherein the interval distance of the plurality of second core plates 12 in the near area is less than the interval distance of the plurality of second core plates 12 in the far area.

[0064] When the door body bears the nuclear explosion load, the stress is not uniform due to the shape of the door body and the boundary conditions. In actual situations, the maximum deformation often occurs at the midpoint of the free edge of the door body. Therefore, by reducing the spacing distance of the core plate, local reinforcement is performed at the maximum deformation, and local reduction is performed at the smaller deformation, realizing more efficient use of materials, while ensuring the resistance performance of the explosion-proof door body, realizing the weight reduction of the door body, and truly achieving light weight and high strength.

[0065] Further, by changing the spacing of the core plates, the size of the ring-shaped unit 15 can be adjusted to change the distribution density of the ring-shaped unit 15. In different embodiments, the size of the ring-shaped unit 15 can change in order or randomly. The present application specifically but non-limitingly provides a scheme:

[0066] Referring to Figure 2 and Figure 3 The size of the ring-shaped unit 15 described above can change in a gradient, that is, the arrangement spacing of the core plates changes in a gradient, the gradient value is g, and where B0 is the size of the ring-shaped unit 15 at the starting point of the gradient change, B1, B2, …, Bn are the sizes of the ring-shaped unit 15 at the points of the gradient change, and Bn+1 is the size of the ring-shaped unit 15 at the end point of the gradient change. n The size of the ring-shaped unit 15 changes continuously in a gradient, wherein the core plates include a plurality of first core plates 11 and a plurality of second core plates 12 described above, and the starting point is the midpoint of the length extension direction of the second frame described above.

[0067] Specifically, the first core plate 11 and the second core plate 12 described above can be different shapes. To make installation more convenient, as an example, the first core plate 11 and the second core plate 12 are both cuboids.

[0068] For the above scheme, in the case where the first core plate 11 and the second core plate 12 are both cuboids, the first core plate 11 has a first main edge parallel to the first direction and a first auxiliary edge perpendicular to both the first main edge and the depth direction of the first slot 14, and the second core plate 12 has a second main edge parallel to the second direction and a second auxiliary edge perpendicular to both the second main edge and the depth direction of the second slot 14. In different embodiments, the lengths of the first auxiliary edges of the plurality of first core plates 11 can be the same or different, and the lengths of the second auxiliary edges of the plurality of second core plates 12 can be the same or different.

[0069] As an example, the first group of first core plates 11 in the plurality of first core plates 11 has partial sections located in the proximal region, the second group of first core plates 11 in the plurality of first core plates 11 has all sections located in the distal region, and the length of the first secondary edge of the first group of first core plates 11 is greater than the length of the first secondary edge of the second group of first core plates 11. Similarly, optionally, the first group of second core plates 12 in the plurality of second core plates 12 has partial sections located in the proximal region, the second group of second core plates 12 in the plurality of second core plates 12 has all sections located in the distal region, and the length of the second secondary edge of the first group of second core plates 12 is greater than the length of the second secondary edge of the second group of second core plates 12.

[0070] When the door body is subjected to a nuclear blast load, the stress is not uniform due to the shape of the door body and the boundary conditions. In actual situations, the maximum deformation often occurs at the midpoint of the free edge of the door body. Therefore, by increasing the length of the first width edge and the second secondary edge of the core plate, local reinforcement is achieved at the maximum deformation, and local reduction is achieved at the smaller deformation, achieving more efficient use of materials, while ensuring the resistance performance of the explosion-proof door body, achieving weight reduction of the door body, and truly achieving lightweight and high strength. The gradient values of the length of the first width edge and the second secondary edge can be adjusted, and can be set according to different resistance levels and specific production conditions, which has strong adaptability and improved designability.

[0071] Further, in different embodiments, the length of the first width edge and the second secondary edge can change in order or can change out of order. The application specifically but not limitingly provides a scheme:

[0072] Referring to Figure 2 and Figure 4 The length of the first width edge and the second secondary edge described above can change in a gradient, the gradient value is g, and where t0 is the length of the first width edge and the second secondary edge at the starting point of the gradient change of the core plate, t1, t2, …, t n The length of the first width edge and the second secondary edge changes continuously in a gradient, wherein the core plate includes the plurality of first core plates 11 and the plurality of second core plates 12 described above, and the starting point is the midpoint of the length extension direction of the second frame described above.

[0073] Combining the above two schemes, the application further provides an optional scheme:

[0074] Continuing to refer to Figure 2 The size of the ring unit 15, the length of the first width edge and the second secondary edge described above can change in a gradient at the same time, the gradient value is g, and where B0 is the size of the ring unit 15 at the starting point of the gradient change, B1, B2, …, B nThe size of the ring unit 15 is continuously changed according to the gradient, wherein t0 is the length of the first width edge and the second width edge at the starting point of the gradient change of the core plate, t1, t2, …, t n The length of the first width edge and the second width edge is continuously changed according to the gradient, wherein the core plate comprises a plurality of first core plates 11 and a plurality of second core plates 12, and the starting point is the midpoint of the length extension direction of the second frame.

[0075] The application provides a preparation method of an explosion door body, comprising the following steps:

[0076] S1. Provide a plurality of core plate blanks, and open a plurality of slots 14 on one side of the core plate blank to obtain a plurality of first core plates 11 and a plurality of second core plates 12.

[0077] Referring to Figure 1 and Figure 5 , specifically, according to the actual production needs, the interval gradient value between each core plate of the explosion door body is determined, and a plurality of flat core plates are prepared, and the core plates are subjected to slot cutting treatment. The slot cutting method can be a wire cutting method, and in different embodiments, the slot cutting depth can be different values. As an example, a plurality of slots with a height of 0.5 times the height of the steel strip are cut in the present embodiment. In addition, in different embodiments, the core plates can be made of different materials. As an example, the core plates in the present embodiment can be made of steel material.

[0078] Further, the application specifically but not limitedly proposes the following three schemes for the above-mentioned core plate interval, the length of the above-mentioned first width edge and the second width edge, it is worth noting that the core plate comprises a plurality of first core plates 11 and a plurality of second core plates 12, and the starting point of the gradient change is the midpoint of the length extension direction of the second frame.

[0079] Continuing to refer to Figure 2 , the gradient value g is selected to be 1.2, the initial length of the first width edge and the second width edge is set to 12 mm, and the initial size of the ring unit 15 is set to 90 mm. The gradient value is calculated to obtain the size of the other ring units 15, and the gradient value is calculated to obtain the length of the first width edge and the second width edge of the other core plates and is rounded. A plurality of flat Q235 steel strips are prepared as the above-mentioned core plates, the length of the first width edge and the second width edge is simultaneously changed according to the gradient, the height is 160 mm, the core plates are subjected to slot cutting treatment by laser wire cutting according to the calculated gradient, the slots with a gradient change in the interval and a gradient change in the width and a height of 0.5 times the height of the steel strip are cut, and the slot width is maintained with a gap of 3-5 μm, to obtain the preformed core plate after slot cutting.

[0080] Continuing to refer to Figure 3, the gradient value g is set to 1.3, the initial ring unit 15 size is set to 90mm, other ring unit 15 sizes are calculated according to the above gradient value, several flat Q235 steel plates are prepared as the above core plates, the first and second edge lengths are both 5mm, the height is 160mm, the core plates are cut according to the above gradient ring unit 15 size by using electric spark wire cutting to cut grooves with a width of 5mm, a height of 0.5 times the height of the core plate, and a gap of 3-5μm, and a pre-cut core plate is obtained.

[0081] With reference to the above Figure 4 , the gradient value g is set to 1.2, the first and second edge lengths of the initial core plate are both set to 12mm, the first and second edge lengths of other core plates are calculated according to the above gradient value and are rounded, several flat Q235 steel plates are prepared as the above core plates, the first and second edge lengths of the core plates have gradient changes according to requirements, the height is 160mm, the ring unit 15 size is set to 440mm, the core plates are cut according to the above gradient ring unit 15 size by using laser wire cutting to cut grooves with a width of 5mm, a height of 0.5 times the height of the core plate, and a gap of 3-5μm, and a pre-cut core plate is obtained.

[0082] The above scheme locally strengthens the most severe stress and deformation of the explosion door body under certain constraints, and appropriately reduces the material at a relatively safe position, which significantly improves the material utilization. According to research, the maximum Von Mises stress of the above explosion door body under the action of a 0.3MPa triangular wave load is 300.5MPa, and the maximum displacement is 1.87mm, which is located at the midpoint of the length extension direction of the second frame. Compared with the current traditional same resistance protective door, the weight is reduced by 43.4% to produce the same size displacement deformation, and the lightweight high-strength is truly realized.

[0083] S2. The insertion slots 14 of the plurality of first core plates 11 and the plurality of second core plates 12 are aligned with each other and inserted together in a one-to-one corresponding manner to form a combination body with a plurality of ring units 15.

[0084] With reference to the above Figure 1 and Figure 6 , specifically, the pre-cut core plate is straightened and corrected, then the pre-cut core plate with the insertion slot is relatively clamped and assembled according to the design requirements, and the insertion slot of the assembled core plate is welded by arc welding, laser welding or brazing.

[0085] S3. providing the prefabricated frame 13, and connecting the combination with the frame 13 and locating the combination in the space enclosed by the frame 13 to form the door core assembly 1.

[0086] Referring to Figure 1 and Figure 7 , specifically, in different embodiments, several channel steels, flat steels or angle steels and the like can be prepared, and the several channel steels, flat steels or angle steels and the like are welded and fixed to obtain the frame 13, and the welding process is selected according to the specific production situation. As an example, in the present embodiment, several 16a # C-shaped channel steels are prepared, and the channel steels are welded by argon arc welding to be fixed into a frame 13 with a length of 3120 mm and a width of 2600 mm.

[0087] S4. providing the first panel 2 and the second panel 3, and fixedly connecting the door core assembly 1 with the first panel 2 and the second panel 3 and locating the door core assembly 1 between the first panel 2 and the second panel 3 to form the explosion-proof door body.

[0088] Referring to Figure 1 and Figure 8 , specifically, the first panel 2 and the second panel 3 described above are 7 mm Q235 steel panels. The explosion-proof door body main body can be welded and fixed with the contact part of the first panel 2 from the inside by arc welding, laser welding or brazing and the like, and then the interior is subjected to anti-rust coating treatment, and the locking transmission mechanism and the like required to be built-in in the explosion-proof door body are installed. Then the second panel 3 is superimposed on the explosion-proof door body main body, and the second panel 3 is welded and fixed with the explosion-proof door body main body by laser welding or resistance roller pressure welding and the like to obtain a preliminary explosion-proof door body. The locking mechanism, the locking mechanism transmission device, the handle and the like related accessories are installed on the preliminary explosion-proof door body by welding or bolt connection of the base, and then the anti-rust coating treatment is performed to obtain the final explosion-proof door body.

[0089] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An explosion door body, characterized in that, The explosion-proof door body comprises a door core assembly (1) and opposite first and second panels (2, 3), the door core assembly (1) being located between and fixedly connected to the first and second panels (2, 3); The door core assembly (1) comprises a frame (13) and a plurality of first and second core plates (11, 12) connected to the frame (13), the plurality of first and second core plates (11, 12) being located in a space enclosed by the frame (13) and connected in a plug-in manner to form a plurality of ring-shaped units (15); One side of the first core plate (11) has a plurality of first insertion slots arranged at intervals in a first direction, and one side of the second core plate (12) has a plurality of second insertion slots arranged at intervals in a second direction, the first direction and the second direction having a preset included angle; The frame (13) is a rectangular frame (13) comprising a first border for connecting with a pivoting mechanism for installing the explosion-proof door body, and a second border opposite to the first border; According to a preset distance threshold relative to a midpoint of a length extension direction of the second border, the area covered by the plurality of ring-shaped units (15) is divided into a near region adjacent to the midpoint and a far region outside the near region, and the distribution density of the plurality of ring-shaped units (15) in the near region and the far region is the same; The frame (13) is a rectangular frame (13) comprising a first border for connecting with a pivoting mechanism for installing the explosion-proof door body, and a second border opposite to the first border; According to a preset distance threshold relative to a midpoint of a length extension direction of the second border, the area covered by the plurality of ring-shaped units (15) is divided into a near region adjacent to the midpoint and a far region outside the near region, and the distribution density of the plurality of ring-shaped units (15) in the near region is greater than the distribution density of the plurality of ring-shaped units (15) in the far region.

2. The explosion door body according to claim 1, wherein The ring-shaped unit (15) is a rectangular unit, the plurality of first core plates (11) are arranged at equal intervals in a direction perpendicular to the first direction, and the plurality of second core plates (12) are arranged at equal intervals in a direction perpendicular to the second direction.

3. The explosion door body of claim 1, wherein, The first direction is perpendicular to the length extension direction of the second border, the second direction is parallel to the length extension direction of the second border, and the ring-shaped unit (15) is a rectangular unit; The plurality of first core plates (11) are arranged at unequal intervals in a direction perpendicular to the first direction, wherein the interval distance of the plurality of first core plates (11) in the near region is less than the interval distance of the plurality of first core plates (11) in the far region; and / or The plurality of first core plates (11) are arranged at unequal intervals in a direction perpendicular to the first direction, wherein the interval distance of the plurality of first core plates (11) in the near region is less than the interval distance of the plurality of first core plates (11) in the far region; and / or The plurality of second core plates (12) are arranged non-equidistantly along a direction perpendicular to the second direction, wherein the interval distance of the plurality of second core plates (12) in the proximal region is smaller than the interval distance of the plurality of second core plates (12) in the distal region.

4. A damper body according to claim 2 or 3, characterised in that The first core plate (11) is a cuboid, and the first core plate (11) has a first major edge parallel to the first direction and a first minor edge perpendicular to both the first major edge and the depth direction of the first slot, and the lengths of the first minor edges of the plurality of first core plates (11) are the same; and The second core plate (12) is a cuboid, and the second core plate (12) has a second major edge parallel to the second direction and a second minor edge perpendicular to both the second major edge and the depth direction of the second slot, and the lengths of the second minor edges of the plurality of second core plates (12) are the same.

5. A damper body according to claim 2 or 3, characterised in that, The first core plate (11) is a cuboid, and the first core plate (11) has a first major edge parallel to the first direction and a first minor edge perpendicular to both the first major edge and the depth direction of the first slot, wherein the partial segments of a first group of first core plates (11) in the plurality of first core plates (11) are located in the proximal region, all segments of a second group of first core plates (11) in the plurality of first core plates (11) are located in the distal region, and the length of the first minor edge of the first group of first core plates (11) is greater than the length of the first minor edge of the second group of first core plates (11); and / or The second core plate (12) is a cuboid, and the second core plate (12) has a second major edge parallel to the second direction and a second minor edge perpendicular to both the second major edge and the depth direction of the second slot, wherein the partial segments of a first group of second core plates (12) in the plurality of second core plates (12) are located in the proximal region, all segments of a second group of second core plates (12) in the plurality of second core plates (12) are located in the distal region, and the length of the second minor edge of the first group of second core plates (12) is greater than the length of the second minor edge of the second group of second core plates (12).

6. The explosion door body of claim 1, wherein, The opening directions of the plurality of first slots and the plurality of second slots are both towards the inside of the space enclosed by the frame (13), and the plurality of first slots and the plurality of second slots are inserted together in a one-to-one corresponding manner to form the plurality of ring-shaped units (15).

7. A method for producing a burst disc body for the burst disc body according to any one of claims 1 to 6, characterized in that The method comprises the following steps: providing a plurality of core plate blanks, and opening a plurality of slots on one side of the core plate blanks to obtain a plurality of first core plates (11) and a plurality of second core plates (12); aligning the first slots of the plurality of first core plates (11) and the second slots of the plurality of second core plates (12) with each other and inserting them together in a one-to-one corresponding manner to form a combination body with a plurality of ring-shaped units (15); A prefabricated frame (13) is provided, and the combination is connected with the frame (13) and located in the space enclosed by the frame (13), so as to form a door core assembly (1); A first panel (2) and a second panel (3) are provided, and the door core assembly (1) is fixedly connected with the first panel (2) and the second panel (3) and located between the first panel (2) and the second panel (3), so as to form the explosion-proof door body.

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