Civil defense door frame and civil defense door based on the integrated splicing of corner plate and frame corner.

Abstract

This application provides a civil defense door frame and a civil defense door based on the integrated splicing of a corner transition plate and a frame corner. The aforementioned civil defense door frame based on the integrated splicing of a corner transition plate and a frame corner includes a frame body, a corner transition plate, and an end corner arc-shaped pressure-bearing component. The frame body includes a top frame plate and a side frame plate. The ends of the top frame plate and the ends of the side frame plates are welded together to form a frame corner. An embedded welding corner groove is provided on the frame corner, and the bottom of the embedded welding corner groove has a positioning surface. At least a portion of the corner transition plate is welded in the embedded welding corner groove. The bottom surface of the corner transition plate is provided with a pressing surface that abuts against the positioning surface, so that the corner transition plate is connected to the top frame plate and the side frame plate respectively. The end corner arc-shaped pressure-bearing component abuts against the top surface of the corner transition plate.

Description

Technical Field

[0001] This invention relates to the field of air defense doors, and in particular to an air defense door frame and air defense door based on the integrated splicing of corner plates and frame corners. Background Technology

[0002] Civil defense doors are the doors at the entrances and exits of civil defense projects. There are many types of civil defense doors, and their sizes and specifications vary according to needs. Therefore, in the actual assembly process, it is necessary to make specific manufacturing of civil defense door frames according to the size and specifications of the civil defense doors.

[0003] For example, patent number CN202110945480.9 discloses a civil defense door frame and its assembly method, as well as a civil defense door. The technical solution for the civil defense door frame is as follows: the corner steel component includes a corner angle steel, an arc-shaped oblique flat steel, and an arc-shaped support plate. The corner angle steel is provided with a first connecting surface, a second connecting surface, and a third connecting surface. The first and second connecting surfaces are cross-connected, and the third connecting surface is connected to both the first and second connecting surfaces. The arc-shaped oblique flat steel is connected to the corner angle steel and is located on the third connecting surface. Both ends of the arc-shaped oblique flat steel point to the first and second connecting surfaces, and both ends are used to connect to the door frame angle steel. The arc-shaped support plate is connected to the corner angle steel and is located on the third connecting surface. Both ends of the arc-shaped support plate point to the first and second connecting surfaces, and both ends are used to connect to the door frame angle steel. The corner of the frame is welded to the door frame plate by a corner plate. The stress point is easily concentrated at the weld, which makes the structural rigidity of the corner insufficient. As a result, the structural strength of the air-raid shelter door frame is poor. At the same time, a special flat auxiliary jig is required for welding assistance to make the corner plate and the door frame plate aligned as a plane.

[0004] Therefore, the existing civil defense door frames have the following defects: poor structural strength at the joints, and the need for auxiliary jigs for welding assistance during assembly, which makes the assembly speed slow. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a civil defense door frame and civil defense door frame based on the integrated splicing of the corner plate and the frame corner, which has better structural strength at the splicing joint and faster assembly speed.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A type of air-raid shelter door frame based on the integrated splicing of corner plates and frame corners includes:

[0008] The frame includes a top frame plate and side frame plates. The ends of the top frame plate and the ends of the side frame plates are welded together to form a frame corner. An embedded welding corner groove is provided on the frame corner, and the bottom of the embedded welding corner groove has a positioning surface.

[0009] A corner plate, at least a portion of which is welded into the embedded welding corner groove, and the bottom surface of which is provided with a pressing surface that abuts against the positioning surface, so that the corner plate is connected to the top frame plate and the side frame plate respectively.

[0010] An arc-shaped pressure-bearing component at the end corner abuts against the top surface of the transition corner plate.

[0011] In one embodiment, the positioning surface is a T-shaped positioning surface.

[0012] In one embodiment, the positioning surface is in full contact with the pressing surface.

[0013] In one embodiment, the corner arc-shaped pressure-bearing assembly includes a first arc-shaped pressure-bearing plate and a second arc-shaped pressure-bearing plate, both of which abut against the top surface of the transition corner plate.

[0014] In one embodiment, the integrated blast door frame based on the corner plate and frame corner splicing further includes a straight bearing assembly. The straight bearing assembly includes a first straight bearing plate, a second straight bearing plate, a third straight bearing plate, and a fourth straight bearing plate. The first straight bearing plate and the second straight bearing plate abut against the top surface of the top frame plate, and the third straight bearing plate and the fourth straight bearing plate abut against the top surface of the side frame. The two ends of the first arc-shaped bearing plate are respectively connected to the first straight bearing plate and the third straight bearing plate, and the two ends of the second arc-shaped bearing plate are respectively connected to the second straight bearing plate and the fourth straight bearing plate.

[0015] In one embodiment, there are two top frame plates and two side frame plates. Each top frame plate is connected to two side frame plates to form a rectangular frame structure, and each top frame plate and one side frame plate form a frame corner.

[0016] In one embodiment, the number of the embedded welding corner grooves is four, and the bottom of each embedded welding corner groove has a positioning surface.

[0017] In one embodiment, the number of transition corner plates is four, at least a portion of each transition corner plate is welded into a corresponding embedded welding corner groove, and the bottom surface of each transition corner plate is provided with a pressing surface that abuts against the corresponding positioning surface, so that each transition corner plate is connected to a top frame plate and a side frame plate respectively.

[0018] In one embodiment, the number of the end-corner arc-shaped pressure-bearing components is four, and the number of the straight pressure-bearing components is two.

[0019] Each of the first straight bearing plates and each of the second straight bearing plates abuts against the top surface of a top frame plate, and each of the third straight bearing plates and each of the fourth straight bearing plates abuts against the top surface of a side frame. The two ends of each of the first arc-shaped bearing plates are respectively connected to a first straight bearing plate and a third straight bearing plate, and the two ends of each of the second arc-shaped bearing plates are respectively connected to a second straight bearing plate and a fourth straight bearing plate.

[0020] A type of air-raid shelter door includes a door leaf and an air-raid shelter door frame based on the integrated splicing of corner plates and frame corners as described in any of the above embodiments, wherein the door leaf and the frame are rotatably connected.

[0021] Compared with the prior art, the present invention has at least the following advantages:

[0022] This application discloses a civil defense door frame based on the integrated splicing of transition corner plates and frame corners. Firstly, the ends of the top frame plate and the side frame plate are welded together to form frame corners. Secondly, an embedded welding corner groove is provided at the frame corner, and the bottom of the groove has a positioning surface, allowing the pressing surface of the transition corner plate to be quickly positioned to the positioning surface. Part of the transition corner plate is then welded into the embedded welding corner groove, thus connecting the transition corner plate to both the top and side frame plates. Compared to traditional civil defense door frames where the stress point at the splice is concentrated at the weld, this application, by integrating the transition corner plate with the frame corner, distributes the stress point across both the top and side frame plates, significantly improving the structural strength of the civil defense door frame at the splice. Furthermore, it eliminates the need for specialized flat auxiliary jigs for welding assistance, allowing for rapid splicing of the transition corner plate and frame corner, thereby effectively increasing the assembly speed of the civil defense door frame. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a civil defense door frame before an explosion, based on an embodiment of an integrated corner plate and frame corner splicing.

[0025] Figure 2 This is a partial structural diagram of a civil defense door frame after an explosion, based on an embodiment of an integrated corner plate and frame corner splicing.

[0026] Figure 3 This is a partial structural diagram of a civil defense door frame after an explosion, based on an embodiment of an integrated corner plate and frame corner splicing.

[0027] Figure 4 This is a partial structural diagram of a civil defense door frame after an explosion, based on an integrated corner plate and frame corner splicing, according to another embodiment.

[0028] Figure 5 This is a partial structural diagram of a civil defense door frame after an explosion, based on an integrated corner plate and frame corner splicing, according to another embodiment. Detailed Implementation

[0029] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] The civil defense door frame based on the integrated splicing of corner transition plates and frame corners provided in this application includes a frame body, corner transition plates, and end corner arc-shaped pressure-bearing components. The frame body includes a top frame plate and a side frame plate. The ends of the top frame plate and the ends of the side frame plates are welded together to form a frame corner. An embedded welding corner groove is provided on the frame corner, and the bottom of the embedded welding corner groove has a positioning surface. At least a portion of the corner transition plate is welded in the embedded welding corner groove. The bottom surface of the corner transition plate is provided with a pressing surface that abuts against the positioning surface, so that the corner transition plate is connected to the top frame plate and the side frame plate respectively. The end corner arc-shaped pressure-bearing components abut against the top surface of the corner transition plate.

[0033] Please see Figures 1 to 3 To better understand the integrated civil defense door frame 10 based on the junction corner plate and frame corner splicing of this application, the following further explanation and description of the integrated civil defense door frame 10 based on the junction corner plate and frame corner splicing is provided:

[0034] An embodiment of a civil defense door frame 10 based on the integrated splicing of a corner transition plate and a frame corner includes a frame body 100, a corner transition plate 200, and an end corner arc-shaped pressure-bearing component 300. The frame body 100 includes a top frame plate 110 and a side frame plate 120. The ends of the top frame plate 110 and the side frame plate 120 are welded together to form a frame corner 130. An embedded welding corner groove 132 is provided on the frame corner 130, and the bottom of the embedded welding corner groove 132 has a positioning surface 134. At least a portion of the corner transition plate 200 is welded in the embedded welding corner groove 132. The bottom surface of the corner transition plate 200 is provided with a pressing surface 202 that abuts against the positioning surface 134, so that the corner transition plate 200 is connected to the top frame plate 110 and the side frame plate 120 respectively. The end corner arc-shaped pressure-bearing component 300 abuts against the top surface of the corner transition plate 200.

[0035] In this embodiment, firstly, the end of the top frame plate 110 is welded together with the end of the side frame plate 120 to form a frame corner 130. Secondly, an embedded welding corner groove 132 is provided in the frame corner 130, and the bottom of the embedded welding corner groove 132 has a positioning surface 134, so that the pressing surface 202 of the transition corner plate 200 can be quickly positioned to the positioning surface 134, and a part of the transition corner plate 200 is welded in the embedded welding corner groove 132, thereby connecting the transition corner plate 200 to the top frame plate 110 and the side frame plate 120 respectively. Compared to traditional air-raid shelter door frames where the stress points are concentrated at the weld seam, this application integrates the corner plate 200 and the frame corner 130 into a single unit, allowing the stress points at the joint to be distributed across the top frame plate 110 and the side frame plate 120. This significantly improves the structural strength of the air-raid shelter door frame at the joint, thereby effectively enhancing its overall structural strength. Furthermore, it eliminates the need for specialized flat auxiliary fixtures for welding assistance, enabling the corner plate 200 and the frame corner 130 to be quickly assembled, thus significantly increasing the assembly speed of the air-raid shelter door frame.

[0036] like Figure 2 As shown, in one embodiment, the positioning surface 134 is a T-shaped positioning surface 134. It should be noted that by perpendicularly welding the ends of the top frame plate 110 and the side frame plate 120 together to form a T-shaped frame corner 130, the bottom of the embedded welding corner groove 132 also corresponds to a T-shaped positioning surface 134. By forming the T-shaped frame corner 130, when the air-raid shelter door frame is in use, the stress point of the side frame plate 120 can fall on the top frame plate 110, and similarly, the stress point of the top frame plate 110 can fall on the side frame plate 120, instead of both stress points falling on the weld between the side frame plate 120 and the top frame plate 110. Combined with the rigidity of the top frame plate 110 and the side frame plate 120 themselves, the structural strength of the frame corner 130 can be significantly improved, thereby effectively enhancing the structural strength of the air-raid shelter door frame.

[0037] like Figures 1 to 3 As shown, in one embodiment, the positioning surface 134 is in full contact with the pressing surface 202. It should be noted that by forming the positioning surface 134, the pressing surface 202 of the transition corner plate 200 can be quickly positioned, enabling rapid assembly of the transition corner plate 200 and the frame corner 130, thereby effectively improving the assembly speed of the air-raid shelter door frame.

[0038] like Figure 1 As shown, in one embodiment, the corner arc-shaped pressure-bearing assembly 300 includes a first arc-shaped pressure-bearing plate 310 and a second arc-shaped pressure-bearing plate 320, both of which abut against the top surface of the transition corner plate 200.

[0039] like Figure 1As shown, in one embodiment, the air-raid shelter door frame 10 based on the integrated splicing of the corner plate and the frame corner further includes a straight pressure-bearing component 400. The straight pressure-bearing component 400 includes a first straight pressure-bearing plate 410, a second straight pressure-bearing plate 420, a third straight pressure-bearing plate 430, and a fourth straight pressure-bearing plate 440. The first straight pressure-bearing plate 410 and the second straight pressure-bearing plate 420 abut against the top surface of the top frame plate 110, and the third straight pressure-bearing plate 430 and the fourth straight pressure-bearing plate 440 abut against the top surface of the side frame 100. The two ends of the first arc-shaped pressure-bearing plate 310 are respectively connected to the first straight pressure-bearing plate 410 and the third straight pressure-bearing plate 430, and the two ends of the second arc-shaped pressure-bearing plate are respectively connected to the second straight pressure-bearing plate 420 and the fourth straight pressure-bearing plate 440.

[0040] like Figure 1 As shown, in one embodiment, there are two top frame plates 110 and two side frame plates 120. Each top frame plate 110 is connected to two side frame plates 120 to form a rectangular frame 100 structure, and each top frame plate 110 and one side frame plate 120 form a frame corner 130. It can be understood that the door frame is a rectangular frame 100 structure; therefore, there are two top frame plates 110 and two side frame plates 120. The two top frame plates 110 and the two side frame plates 120 form a door frame, and the number of frame corners 130 formed is four.

[0041] like Figure 1 and Figure 2 As shown, in one embodiment, there are four embedded welding corner grooves 132, and the bottom of each embedded welding corner groove 132 has a positioning surface 134. It can be understood that since the door frame is a rectangular frame 100, the number of frame corners 130 is four. Therefore, four embedded welding corner grooves 132 and four corresponding positioning surfaces 134 are provided to facilitate the quick assembly of the corner plate 200.

[0042] like Figure 1 and Figure 2 As shown, there are four transition corner plates 200. At least a portion of each transition corner plate 200 is welded into a corresponding embedded welding corner groove 132. The bottom surface of each transition corner plate 200 is provided with a pressing surface 202 that abuts against a corresponding positioning surface 134, so that each transition corner plate 200 is connected to a top frame plate 110 and a side frame plate 120 respectively. It can be understood that the four frame corners 130 correspond to four embedded welding corner grooves 132, that is, four positioning surfaces 134. By providing four positioning surfaces 134, the four frame corners 130 and the four transition corner plates 200 can be quickly positioned and connected, thereby effectively improving the assembly speed of the air-raid shelter door frame.

[0043] like Figure 1 As shown, in one embodiment, there are four corner arc-shaped pressure-bearing components 300 and two straight pressure-bearing components 400; each of the first straight pressure-bearing plates 410 and each of the second straight pressure-bearing plates 420 abuts against the top surface of a top frame plate 110, each of the third straight pressure-bearing plates 430 and each of the fourth straight pressure-bearing plates 440 abuts against the top surface of a side frame 100, and the two ends of each of the first arc-shaped pressure-bearing plates 310 are respectively connected to a first straight pressure-bearing plate 410 and a third straight pressure-bearing plate 430, and the two ends of each of the second arc-shaped pressure-bearing plates are respectively connected to a second straight pressure-bearing plate 420 and a fourth straight pressure-bearing plate 440.

[0044] like Figure 1 As shown, in one embodiment, the top frame plate 110, the first straight bearing plate 410, and the second straight bearing plate 420 are integrally formed structures; the side frame plate 120, the third straight bearing plate 430, and the fourth straight bearing plate 440 are integrally formed structures; and the corner plate 200, the first arc-shaped bearing plate 310, and the second arc-shaped bearing plate 320 are integrally formed structures. It can be understood that this results in better structural stability of the air-raid shelter door frame.

[0045] Furthermore, such as Figure 4 and Figure 5 The frame corner 130 has a first mortise groove 136 and a second mortise groove 138 formed on the positioning surface 134. The pressing surface 202 of the transition corner plate 200 is provided with a first tenon block 210 and a second tenon block 220. The first tenon block 210 is correspondingly set in the first mortise groove 136, and the second tenon block 220 is correspondingly set in the second mortise groove 138, so that both the first tenon block 210 and the second tenon block 220 are connected to the frame corner 130, thus forming a mortise and tenon structure between the frame corner 130 and the transition corner plate 200. It should be noted that the tenon refers to the protruding part, and the mortise refers to the recessed part. By forming a mortise and tenon structure between the frame corner 130 and the transition corner plate 200, the pressing surface 202 of the transition corner plate 200 can be quickly and accurately positioned to the positioning surface 134, so that the transition corner plate 200 is connected to the frame corner 130, further improving the assembly speed of the air-raid shelter door frame.

[0046] Furthermore, such as Figure 5As shown, the transition corner plate 200 has a straight groove 204 to divide it into a first sub-corner plate 230 and a second sub-corner plate 240. Due to tolerances and precision issues between the transition corner plate 200 and the frame corner 130, to improve the flatness of the transition corner plate 200 with the top frame plate 110 and the side frame plate 120, a straight groove 204 is formed in the transition corner plate 200, dividing it into a first sub-corner plate 230 and a second sub-corner plate 240. This allows the first sub-corner plate 230 to be finely adjusted and oscillated within the embedded welding corner groove 132 to align with the top frame plate 110. Similarly, the second sub-corner plate 240 can be finely adjusted and oscillated within the embedded welding corner groove 132 to align with the side frame plate 120. After the first sub-corner plate 230 and the second sub-corner plate 240 are aligned, the straight groove 204 is compensated by welding to form the transition corner plate 200. The straight groove 204 does not bring much change to the structural strength of the entire transition corner plate 200, but it can make the connection accuracy between the transition corner plate 200 and the top frame plate 110 and the side frame plate 120 more precise, and the integration degree between the transition corner plate 200 and the frame corner 130 is higher.

[0047] This application also provides a civil defense door, including a door leaf and a civil defense door frame based on the integrated splicing of corner plates and frame corners as described in any of the above embodiments, wherein the door leaf and the frame are rotatably connected.

[0048] In this embodiment, the ends of the top frame plate and the side frame plate are first welded together to form a frame corner. Then, an embedded welding corner groove is provided at the frame corner, and the bottom of the groove has a positioning surface, allowing the pressing surface of the transition corner plate to be quickly positioned to the positioning surface. Part of the transition corner plate is then welded into the embedded welding corner groove, thus connecting the transition corner plate to both the top frame plate and the side frame plate. Compared to traditional air-raid shelter door frames where the stress point at the joint is concentrated at the weld, this application integrates the transition corner plate with the frame corner, distributing the stress point across both the top and side frame plates. This significantly improves the structural strength of the air-raid shelter door at the joint, effectively enhancing its overall structural strength. Furthermore, it eliminates the need for specialized flat auxiliary fixtures for welding assistance, allowing for rapid assembly of the transition corner plate and frame corner, thereby significantly increasing the assembly speed of the air-raid shelter door.

[0049] Compared with the prior art, the present invention has at least the following advantages:

[0050] This application discloses a civil defense door frame based on the integrated splicing of transition corner plates and frame corners. Firstly, the ends of the top frame plate and the side frame plate are welded together to form frame corners. Secondly, an embedded welding corner groove is provided at the frame corner, and the bottom of the groove has a positioning surface, allowing the pressing surface of the transition corner plate to be quickly positioned to the positioning surface. Part of the transition corner plate is then welded into the embedded welding corner groove, thus connecting the transition corner plate to both the top and side frame plates. Compared to traditional civil defense door frames where the stress point at the splice is concentrated at the weld, this application, by integrating the transition corner plate with the frame corner, distributes the stress point across both the top and side frame plates, significantly improving the structural strength of the door frame at the splice. Furthermore, it eliminates the need for specialized flat auxiliary jigs for welding assistance, allowing for rapid splicing of the transition corner plate and frame corner, thereby effectively increasing the assembly speed of the civil defense door frame.

[0051] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A type of air-raid shelter door frame based on the integrated splicing of corner plates and frame corners, characterized in that, include: The frame includes a top frame plate and side frame plates. The ends of the top frame plate and the ends of the side frame plates are welded together to form a frame corner. An embedded welding corner groove is provided on the frame corner, and the bottom of the embedded welding corner groove has a positioning surface. A corner plate, at least a portion of which is welded into the embedded welding corner groove, and the bottom surface of which is provided with a pressing surface that abuts against the positioning surface, so that the corner plate is connected to the top frame plate and the side frame plate respectively. An arc-shaped pressure-bearing component at the end corner, wherein the arc-shaped pressure-bearing component at the end corner abuts against the top surface of the transition corner plate; The frame corner has a first mortise and a second mortise on the positioning surface. The lower pressing surface of the corner plate is provided with a first tenon block and a second tenon block. The first tenon block is correspondingly set in the first mortise and the second tenon block is correspondingly set in the second mortise, so that both the first tenon block and the second tenon block are connected to the frame corner, so that the frame corner and the corner plate form a mortise and tenon structure. The transition corner plate has a straight groove to divide it into a first sub-corner plate and a second sub-corner plate.

2. The air-raid shelter door frame based on the integrated splicing of the corner plate and the frame corner as described in claim 1, characterized in that, The positioning surface is a T-shaped positioning surface.

3. The air-raid shelter door frame based on the integrated splicing of the corner plate and the frame corner as described in claim 2, characterized in that, The positioning surface is in full contact with the pressing surface.

4. The air-raid shelter door frame based on the integrated splicing of the corner plate and the frame corner as described in claim 1, characterized in that, The corner arc-shaped pressure-bearing assembly includes a first arc-shaped pressure-bearing plate and a second arc-shaped pressure-bearing plate, both of which abut against the top surface of the transition corner plate.

5. The air-raid shelter door frame based on the integrated splicing of the corner plate and the frame corner as described in claim 4, characterized in that, It also includes a linear bearing assembly, which includes a first linear bearing plate, a second linear bearing plate, a third linear bearing plate, and a fourth linear bearing plate. The first and second linear bearing plates abut against the top surface of the top frame plate, and the third and fourth linear bearing plates abut against the top surface of the side frame plate. The two ends of the first arc-shaped bearing plate are respectively connected to the first linear bearing plate and the third linear bearing plate, and the two ends of the second arc-shaped bearing plate are respectively connected to the second linear bearing plate and the fourth linear bearing plate.

6. The air-raid shelter door frame based on the integrated splicing of the corner plate and the frame corner as described in claim 5, characterized in that, The number of top frame plates and side frame plates are both two. Each top frame plate is connected to two side frame plates to form a rectangular frame structure, and each top frame plate and one side frame plate form a frame corner.

7. The air-raid shelter door frame based on the integrated splicing of the corner plate and the frame corner as described in claim 6, characterized in that, The number of the embedded welding corner grooves is four, and the bottom of each embedded welding corner groove has a positioning surface.

8. The air-raid shelter door frame based on the integrated splicing of the corner plate and the frame corner as described in claim 7, characterized in that, The number of the transition corner plates is four. At least a portion of each transition corner plate is welded into the corresponding embedded welding corner groove. The bottom surface of each transition corner plate is provided with a pressing surface that abuts against the corresponding positioning surface, so that each transition corner plate is connected to a top frame plate and a side frame plate respectively.

9. The air-raid shelter door frame based on the integrated splicing of the corner plate and the frame corner as described in claim 8, characterized in that, The number of the end-corner arc-shaped pressure-bearing components is four, and the number of the straight pressure-bearing components is two; Each of the first straight bearing plates and each of the second straight bearing plates abuts against the top surface of a top frame plate, each of the third straight bearing plates and each of the fourth straight bearing plates abuts against the top surface of a side frame plate, each of the two ends of each of the first arc-shaped bearing plates is connected to a first straight bearing plate and a third straight bearing plate respectively, and each of the two ends of each of the second arc-shaped bearing plates is connected to a second straight bearing plate and a fourth straight bearing plate respectively.

10. A type of air-raid shelter door, characterized in that, The invention includes a door leaf and a civil defense door frame based on the integrated splicing of a corner plate and a frame corner as described in any one of claims 1-9, wherein the door leaf is rotatably connected to the frame.

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