Combined assembly type countersunk head reinforcing structure

Abstract

The utility model discloses a combined assembly type countersunk head reinforcing structure which comprises long beams, short beams and connecting pieces connected with the long beams and the short beams respectively, a rectangular frame is defined by the long beams and the short beams, countersunk head protrusions are arranged on the long beams, a plurality of secondary beams are connected in the rectangular frame, the ends of the secondary beams are connected with the countersunk head protrusions of the long beams through riveting pieces, and the long beams and the short beams are connected through the riveting pieces. The protruding direction of the countersunk head protrusions faces the secondary beams. The countersunk head protrusions are directly pressed on the web plate of the main beam during prefabrication, so that the local thickness of the web plate of the main beam is increased, in this way, constructors do not need to additionally weld stiffening ribs on site, only the ends of the secondary beams need to be connected to the positions of the countersunk head protrusions, the workload of the constructors is relieved, and the construction time is shortened. On the other hand, the strength of the connecting position of the main beam and the secondary beam can be guaranteed.

Description

Technical Field

[0001] This application relates to the field of prefabricated buildings, and in particular to a modular prefabricated countersunk reinforced structure. Background Technology

[0002] In the development of industrialized construction, prefabricated buildings are a result of the advanced development of industrialized construction, and their core concept is standardized prefabricated modular spaces. Container houses, as a typical representative of modular architecture, have created a novel, vibrant, and unprecedented architectural style in modern society.

[0003] Container houses generally consist of a vertical structure (walls) and a horizontal structure (floors). The horizontal structure is formed by multiple main beams and secondary beams connected together. To improve the strength of these connections, existing methods often add stiffening ribs to these joints. However, this method of adding stiffening ribs increases the workload of construction workers and prolongs construction time, which can easily affect the delivery time of the container house. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a modular, countersunk reinforced structure. This can improve the strength of the connection between the main beam and the secondary beam.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A modular countersunk reinforced structure includes a long beam, a short beam, and connectors that connect to the long beam and the short beam respectively. The long beam and the short beam together form a rectangular frame. The long beam is provided with a countersunk protrusion. Multiple secondary beams are connected within the rectangular frame. The ends of the secondary beams are connected to the countersunk protrusions of the long beams by riveting. The protrusion direction of the countersunk protrusions faces the secondary beams.

[0007] Preferably, the countersunk protrusion is waist-shaped, and the countersunk depth of the countersunk protrusion is 3.5mm-5.5mm.

[0008] Preferably, a reinforcing beam is also fixed at the connection between the long beam and the short beam.

[0009] Preferably, the secondary beam has an opening, through which the reinforcing beam passes and is connected at both ends to the long beam and the short beam, respectively.

[0010] Preferably, the reinforcing beam is an L-shaped steel beam, and the web of the reinforcing beam also has a second bending plate at both ends, which is fixedly connected to the long beam and the short beam respectively.

[0011] Preferably, the short beam is also provided with a countersunk protrusion, and the reinforcing beam is riveted to the countersunk protrusions on the long beam and the short beam respectively.

[0012] Preferably, the opening is waist-shaped.

[0013] Preferably, the secondary beam and the short beam are channel steel, and the upper and lower flanges of the long beam and the short beam are provided with second mounting holes.

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

[0015] During prefabrication, countersunk protrusions are directly pressed into the web of the main beam, increasing the local thickness of the web. This method eliminates the need for on-site welding of stiffening ribs; the ends of the secondary beams are simply connected to the countersunk protrusions. This reduces the workload of the construction workers and shortens construction time. Furthermore, it ensures the strength of the connection between the main and secondary beams, ultimately shortening the delivery time of the container house. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a partial structural schematic diagram of the present invention.

[0018] Figure 3 This is a schematic diagram of the connection between the long beam, the short beam, and the connector in this utility model.

[0019] Figure 4 This is an exploded view of the long beam, short beam, and connecting parts in this utility model.

[0020] Figure 5 This is a cross-sectional schematic diagram of the connection between the main beam and the connecting component in this utility model.

[0021] Figure 6 This is an exploded structural diagram of the connector in this utility model.

[0022] Figure 7 This is a schematic diagram showing the connection position between the main beam and the secondary beam in this utility model.

[0023] Figure 8 This is an exploded view of the connection position between the main beam and the secondary beam in this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Main beam; 11. Long beam; 12. Short beam; 13. Main web; 131. Rivet hole; 132. Countersunk protrusion; 14. Main upper flange plate; 141. Main upper bent plate; 15. Main lower flange plate; 151. Main lower bent plate; 16. Second mounting hole; 17. Main beam countersunk hole; 2. Secondary beam; 21. Connecting groove; 22. Connecting beam; 222. First bent plate; 23. Secondary web; 231. Secondary web bent plate; 24. Secondary upper flange plate; 241. Secondary upper... 25. Bent plate; 251. Secondary lower flange plate; 26. Through opening; 27. Reinforcing beam; 271. Secondary bent plate; 28. Hemmed edge; 3. Connector; 31. First connecting plate; 311. Connecting extension plate; 312. First assembly hole; 32. Second connecting plate; 321. Weight reduction hole; 322. Ear plate; 323. Bent opening; 33. Cover plate; 331. Chamfer; 332. First mounting hole; 333. Positioning hole; 34. Corner countersunk hole; 35. Transition section. Detailed Implementation

[0025] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive. Furthermore, the terms "first," "second," "third," and similar expressions are used for descriptive and distinguishing purposes only and should not be construed as indicating or implying the relative importance of the corresponding components.

[0026] The following is in conjunction with the appendix Figure 1 - Appendix Figure 8 This application will be described in further detail.

[0027] This application discloses a modular countersunk reinforced structure.

[0028] Reference Figure 1 and Figure 2 A modular, countersunk reinforced structure includes a main beam 1 and connectors 3. The main beam 1 includes long beams 11 and short beams 12, and the connectors 3 are used to connect the long beams 11 and the short beams 12. Two long beams 11 and two short beams 12 are joined together by four connectors 3 to form a rectangular frame. Multiple secondary beams 2 are connected within the rectangular frame, and the two ends of the secondary beams 2 are connected to the long beams 11 by riveting. The secondary beams 2 also have connecting grooves 21, and connecting beams 22 are arranged in the connecting grooves 21. The connecting beams 22 pass through the connecting grooves 21 of each secondary beam 2 and are riveted to the short beams 12 at both ends to form a transverse structure for use as a floor slab.

[0029] The main beam 1 is made of C300 or C250 martensitic aging steel, specifically a single-sided channel steel. The height of the main beam 1 is 280mm-300mm; in this embodiment, the height of the main beam 1 is preferably 300mm. The flange width of the main beam 1 is 90mm-100mm; in this embodiment, the flange width of the main beam 1 is preferably 90mm. The thickness of the main beam 1 is 2.5mm-3.5mm; in this embodiment, the thickness of the main beam 1 is preferably 4.5mm.

[0030] The long beam 11 and the short beam 12 have the same structure, only differing in length. In other embodiments, the short beams 12 can be connected to each other, or the long beams 11 can be connected to each other, thereby forming a square frame.

[0031] Reference Figures 3-6 The connector 3 includes a first connecting plate 31 and a second connecting plate 32 that are bent at a 90° angle. Connecting extension plates 311 are provided on both sides of the first connecting plate 31, and the height of the extension plates 311 is the same as that of the first connecting plate 31. A first mounting hole 312 is provided on the first connecting plate 31 to facilitate the installation of external accessories. A weight-reducing hole 321 corresponding to the position of the first mounting hole 312 is provided on the second connecting plate 32. The weight-reducing hole 321 reduces the amount of steel used in the connector 3, thereby reducing the structure's self-weight.

[0032] Reference Figures 3-6 The second connecting plate 32 is provided with ear plates 322 corresponding to the connecting extension plate 311 at its upper and lower ends respectively. There are four ear plates 322, which are distributed in pairs at the upper and lower ends of the bent second connecting plate 32.

[0033] Reference Figures 3-6 The first connecting plate 31 and the connecting extension plate 311 are integrally formed structures. The first connecting plate 31 and the connecting extension plate 311 can be formed by stamping with a punch press. The second connecting plate 32 and the ear plate 322 are integrally formed structures. The second connecting plate 32 and the ear plate 322 can also be formed by stamping with a punch press. The ear plate 322 is bent at 90° on the second connecting plate 32. The upper and lower ends of the bending part of the second connecting plate 32 are provided with bending openings 323. The bending openings 323 are provided to facilitate the bending operation of the ear plate 322.

[0034] Reference Figures 3-6 The first connecting plate 31 and the second connecting plate 32 are fixed together. The first connecting plate 31 and the second connecting plate 32 are welded and fixed to form a column with openings at the top and bottom. The column is a cubic shape with openings at the top and bottom. The upper and lower ends of the column are respectively welded with cover plates 33. The outline of the cover plates 33 is adapted to the inner circumferential outline of the column. The upper and lower cover plates 33 are respectively installed to close the upper and lower openings of the column.

[0035] The cover plate 33 is welded to the sides of the first connecting plate 31 and the second connecting plate 32. The four corners of the cover plate 33 are provided with chamfers 331. The chamfers 331 allow the cover plate 33 to be better installed on the inner circumference of the column, avoiding interference with the installation of the cover plate 33.

[0036] A positioning hole 333 is provided in the middle of the cover plate 33, and a first mounting hole 332 is provided on the outer periphery of the positioning hole 333. The positioning hole 333 can be a threaded hole.

[0037] Reference Figures 3-6 The ear plate 322 is fixed on the corresponding connecting extension plate 311. Specifically, the ear plate 322 is welded and fixed on the corresponding connecting extension plate 311, and the upper and lower ends of the connecting extension plate 311 are flush with the corresponding ear plate 322. The connecting extension plate 311 and its corresponding upper and lower ear plates 322 cooperate to form a laterally arranged "U" shaped structure.

[0038] By combining stamping and welding, the manufacturing of connector 3 is convenient, which improves the production efficiency of connector 3 and reduces the production cost. When it is necessary to modify the size of connector 3, the size of the subsequently produced connector 3 can be modified by replacing the stamping die. Compared with the traditional casting-formed connector 3, the processing and manufacturing of connector 3 in this embodiment is more convenient, more adaptable, and easier to adjust the size.

[0039] In this application, the thickness of the first connecting plate 31 and the second connecting plate 32 is 4mm-5mm.

[0040] Reference Figures 3-6 The connecting extension plate 311 and the ear plate 322 are provided with a number of countersunk corner holes 34. The countersunk corner holes 34 can be used to fix the riveted parts. The countersunk corner holes 34 are obliquely distributed on the connecting extension plate 311 and the ear plate 322. The oblique distribution of the countersunk corner holes 34 increases the number of countersunk corner holes 34, thereby improving the overall structural strength after riveting through the countersunk corner holes 34. The distance between adjacent countersunk corner holes 34 is equal.

[0041] The countersunk hole 34 of the corner fitting has a diameter of 22mm-28mm; in this embodiment, the diameter of the countersunk hole 34 is 25mm. The depth of the countersunk hole 34 is 3.5mm-5.5mm; in this embodiment, the depth of the countersunk hole 34 is 4.5mm. The countersunk angle of the countersunk hole 34 is 130°-140°.

[0042] Reference Figures 3-6 A transition section 35 is provided between the first connecting plate 31 and the connecting extension plate 311, which bends close to the second connecting plate 32. By providing the transition section 35, the connecting extension plate 311 is distributed closer to the second connecting plate 32.

[0043] Taking the long beam 11 as an example, the end of the long beam 11 is fitted onto the outside of the ear plate 322 and the connecting extension plate 311, so that the end of the long beam 11 is fitted with the connecting extension plate 311 and the ear plate 322. Specifically, the web of the long beam 11 is fitted with the outside of the connecting extension plate 311, and the flange of the long beam 11 is fitted with the outside of the ear plate 322.

[0044] Reference Figures 3-6 The main beam 1 has countersunk holes 17 corresponding to the ear plate 322 and the connecting extension plate 311. That is, the countersunk holes 17 on the main beam 1 correspond to the countersunk holes 34 on the corner fittings on the connecting extension plate 311, and the countersunk holes 17 on the main beam 1 correspond to the countersunk holes 34 on the ear plate 322. When the end of the main beam 1 is sleeved on the outside of the ear plate 322 and the connecting extension plate 311, the countersunk holes 17 on the main beam 1 are positioned internally and externally corresponding to the countersunk holes 34 on the connecting extension plate 311 and the ear plate 322. This allows the main beam 1 and the connecting piece 3 to be quickly positioned and riveted through the corresponding countersunk holes 17 and countersunk holes 34, thereby improving the assembly accuracy during use and ensuring the efficiency and quality of installation.

[0045] The diameter of the countersunk hole 17 in the main beam is 16mm-24mm; in this embodiment, the diameter of the countersunk hole 17 is 20mm, and the depth of the countersunk hole 17 is 3.5mm-5.5mm; in this embodiment, the depth of the countersunk hole 17 is 4.5mm. The countersunk holes 17 in adjacent rows are staggered; the distance between two adjacent countersunk holes 17 is equal. Equal distance improves the uniformity of stress at the connection point under external loads.

[0046] After the connector 3 and the main beam 1 are prefabricated and transported to the site, the countersunk hole 34 of the corner piece and the countersunk hole 17 of the main beam are connected together, and then the connector 3 and the main beam 1 are connected by riveting.

[0047] In this application, the riveting component is a seahorse rivet; in other embodiments, the riveting component may also be a piercing rivet.

[0048] Furthermore, when the countersunk hole 17 on the main beam 1 is positioned corresponding to the countersunk hole 34 on the connecting extension plate 311 and the ear plate 322, the web end of the main beam 1 abuts against the transition section 35, thereby improving the efficiency and accuracy of the main beam 1 when assembled with this embodiment.

[0049] Reference Figures 3-6Furthermore, when the countersunk hole 17 on the main beam 1 corresponds to the countersunk hole 34 on the connecting extension plate 311 and the ear plate 322, the countersunk hole 17 on the main beam 1 and the countersunk hole 34 on the corner piece 3 abut against each other to increase the contact area between the connecting piece 3 and the main beam 1. Thus, when the main beam 1 and the connecting piece 3 are fixed by the riveting, the countersunk hole 17 on the main beam and the countersunk hole 34 on the corner piece are abutted against each other, which can improve the assembly structure strength of the main beam 1 riveted to the connecting piece 3.

[0050] Reference Figure 1 , Figure 2 , Figure 7 and Figure 8 The main beam 1 includes a main web 13, a main upper flange 14, and a main lower flange 15. The main upper flange 14 is fixedly connected to the upper end of the main web 13, and the main lower flange 15 is fixedly connected to the lower end of the main web 13. The main upper flange 14 is bent vertically downwards on the side facing the secondary beam 2 to form a main upper bent plate 141, and the main lower flange 15 is bent vertically upwards on the side facing the secondary beam 2 to form a main lower bent plate 151. The main upper bent plate 141 and the main lower bent plate 151 are mainly used to connect the main beam 1 and the secondary beam 2 into a whole, thereby achieving a more efficient structural connection and functional integration. Furthermore, multiple second mounting holes 16 are equidistantly arranged on the main upper flange 14 and the main lower flange 15. The second mounting holes 16 facilitate the connection of the main beam 1 to the vertical structure, ensuring that the main beam 1 is accurately fixed in the required position.

[0051] Reference Figure 1 , Figure 2 , Figure 7 and Figure 8 Furthermore, several countersunk protrusions 132 are pressed onto the main web plate 13. These countersunk protrusions 132 are waist-shaped, with arc-shaped upper and lower ends, and a countersunk depth of 3.5mm-5.5mm. The arc-shaped design better disperses stress, reduces stress concentration in the connection area, and reduces the risk of damage to the connection components due to stress concentration, thereby improving the strength and stability of the connection. The countersunk protrusions 132 effectively increase the thickness of the main web plate 13, thus improving the connection strength. Since the countersunk protrusions 132 are directly stamped in the factory, there is no need for workers to add stiffening ribs on-site to meet the connection strength requirements, thereby improving assembly efficiency.

[0052] Reference Figure 1 , Figure 2 , Figure 7 and Figure 8The secondary beam 2 includes a secondary web 23, a secondary upper flange 24, and a secondary lower flange 25. The secondary upper flange 24 is fixedly connected to the upper end of the secondary web 23, and the secondary lower flange 25 is fixedly connected to the lower end of the secondary web 23.

[0053] Reference Figure 1 , Figure 2 , Figure 7 and Figure 8 The secondary beam 2 has a C-shaped groove. The end of the secondary upper flange plate 24 facing the main beam 1 is bent vertically downward to form a secondary upper bent plate 241. The end of the secondary lower flange plate 25 facing the main beam 1 is bent vertically upward to form a secondary upper bent plate 241. The bending length of the secondary upper bent plate 241 and the secondary lower bent plate 251 is 30mm. The bending length of the main upper bent plate 141 is the same as that of the secondary upper bent plate 241. The bending length of the main lower bent plate 151 is the same as that of the secondary lower bent plate 251. The end of the secondary web plate 23 is bent to form a secondary web bent plate 231. The secondary web bent plate 231 corresponds to the countersunk protrusion 132, and the two are connected by a riveting.

[0054] The secondary upper bending plate 241 and the main upper bending plate 141 are riveted together by a riveting component.

[0055] The secondary lower bending plate 251 and the main lower bending plate 151 are riveted together by a riveting device.

[0056] The main beam 1 and secondary beam 2 are riveted using a cold treatment method, which avoids the risk of igniting flammable materials during the welding process, and the riveted connection has better ductility when subjected to impact or vibration; the riveting of the main beam 1 and secondary beam 2 can be mass-produced, which greatly improves the efficiency of the processing.

[0057] Reference Figure 1 , Figure 2 , Figure 7 and Figure 8 The secondary beam 2 is connected to the main beam 1 by piercing rivets. Driven by a hydraulic piercing rivet punch, the piercing rivets pierce the secondary upper bending plate 241 and the secondary lower bending plate 251 respectively. At the same time, the piercing rivets cause the main upper bending plate 141 and the main lower bending plate 151 to plastically deform and enter the piercing riveting die. Under the action of the punch and boss in the hydraulic piercing rivet punch, the legs of the piercing rivets expand to both sides and embed into the main upper bending plate 141 and the main lower bending plate 151 respectively, thus making the main upper bending plate 141 and the secondary upper bending plate 241 tightly connected, and the main lower bending plate 151 and the secondary lower bending plate 251 tightly connected. The secondary upper bending plate 241 is riveted to the main upper bending plate 141, and the secondary lower bending plate 251 is riveted to the main lower bending plate 151. This connection method allows the secondary beam 2 to have a torsional resistance. Furthermore, it can prevent the main beam 1 and the secondary beam 2 from loosening after the countersunk head protrusion 132 and the secondary web bending plate 231 are connected, making the connection between the main beam 1 and the secondary beam 2 more secure.

[0058] During the riveting process between the secondary bent plate 231 and the countersunk protrusion 132, the piercing rivet is pre-pressed towards the main web plate 13 under the drive of the hydraulic piercing rivet punch; the hydraulic piercing rivet punch can push the piercing rivet to force it to pierce the countersunk protrusion 132 during the movement, and at the same time the piercing rivet can cause the secondary bent plate 231 to undergo plastic deformation and enter the piercing riveting die.

[0059] Reference Figure 1 , Figure 2 , Figure 7 and Figure 8 As riveting progresses, the secondary bent plate 231 gradually fills the piercing and riveting die due to plastic deformation. The piercing and riveting die has a punch and a boss. Under the action of the punch and the boss, the legs of the piercing rivet expand to both sides and embed into the secondary bent plate 231, thereby tightly connecting the piercing rivet with the countersunk protrusion 132 and the secondary bent plate 231. The riveting of the secondary bent plate 231 to the countersunk protrusion 132 makes the connection between the main beam 1 and the secondary beam 2 more compact and secure, and able to withstand greater pressure. The countersunk protrusion 132 is formed by machine tool pressing, thus exhibiting a structure that protrudes towards the secondary beam 2 and is recessed towards the secondary beam 2. This method can increase the thickness of the connection point of the main beam 1, thereby improving the connection strength. This not only makes the connection between the main beam 1 and the secondary beam 2 tighter. In addition, multiple rivet holes 131 are provided between the countersunk head protrusion 132 and the secondary web bending plate 231. In this embodiment, there are three rivet holes 131 with equal distances. These multiple rivet holes 131 can better disperse and bear external forces, thereby improving the stability and safety of the connection between the main beam 1 and the secondary beam 2, and allowing the use of higher strength steel to adapt to the structural system.

[0060] The end of the secondary web 23 is shaped like an isosceles trapezoid. This connection method prevents the secondary beam 2 from contacting the connection points between the main web 13 and the main upper flange 14 or lower flange, reducing stress concentration and thus improving the stability and load-bearing capacity of the entire structure.

[0061] The spacing between adjacent secondary beams 2 is 350mm-450mm. The connecting groove 21 of the secondary beam 2 has a rolled edge 28, and the connecting beam 22 is a channel steel. The upper and lower flanges of the connecting beam 22 are fixedly connected to the rolled edge 28. The connecting groove 21 is a slotted hole with a length of 80mm-120mm. The connecting beam 22 is made of C150 maraging steel.

[0062] The webs at both ends of the connecting beam 22 are extended and bent to form the first bent plate 222, and the first bent plate 222 is riveted to the countersunk protrusion 13 on the main beam 1.

[0063] Secondary beam 2 is made of C200 or C250 martensitic aging steel, and its specification is C-shaped steel.

[0064] Reference Figure 1 , Figure 2 , Figure 7 and Figure 8 To enhance the strength of the connection between the long beam 11 and the short beam 12, a reinforcing beam 27 is fixed at the connection point. The secondary beam 2 also has an opening 26 through which the reinforcing beam 27 passes, with both ends connected to the long beam 11 and the short beam 12 respectively. To reduce the need for additional equipment in fabricating the secondary beam 2, the size and specifications of the opening 26 and the connecting groove 21 are designed to be identical. This allows a single piece of equipment to fabricate both the opening 26 and the connecting groove 21 in the secondary beam 2.

[0065] The reinforcing beam 27 is an L-shaped steel beam. The web of the reinforcing beam 27 also has a second bending plate 271 at both ends. The second bending plate 271 is fixedly connected to the countersunk protrusion 132 on the long beam 11 and the short beam 12, respectively.

[0066] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods without changing the essential spirit of this utility model. Therefore, the above specific embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as a limitation or restriction on the technical solution of this utility model. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A modular, assembled countersunk reinforced structure, characterized in that: Includes a long beam (11), a short beam (12), and connectors (3) that are connected to the long beam (11) and the short beam (12) respectively. The long beam (11) and the short beam (12) together form a rectangular frame. The long beam (11) is provided with a countersunk protrusion (132). Multiple secondary beams (2) are connected inside the rectangular frame. The ends of the secondary beams (2) are connected to the countersunk protrusions (132) of the long beam (11) through riveting. The protrusion direction of the countersunk protrusions (132) is towards the secondary beams (2).

2. The countersunk reinforced structure of the modular assembly type as described in claim 1, characterized in that: The countersunk protrusion (132) is waist-shaped, and the countersunk depth of the countersunk protrusion (132) is 3.5mm-5.5mm.

3. The assembled countersunk reinforced structure as described in claim 2, characterized in that: A reinforcing beam (27) is also fixed at the connection between the long beam (11) and the short beam (12).

4. The countersunk reinforced structure of the assembled type as described in claim 2, characterized in that: The secondary beam (2) has an opening (26), and the reinforcing beam (27) passes through the opening (26) and is connected at both ends to the long beam (11) and the short beam (12) respectively.

5. The countersunk reinforced structure of the assembled type as described in claim 2, characterized in that: The reinforcing beam (27) is an L-shaped steel beam. The web of the reinforcing beam (27) also has a second bending plate (271) at both ends. The second bending plate (271) is fixedly connected to the long beam (11) and the short beam (12) respectively.

6. The countersunk reinforced structure of the modular assembly type as described in claim 3, characterized in that: The short beam (12) is also provided with a countersunk protrusion (132), and the reinforcing beam (27) is riveted to the countersunk protrusion (132) on the long beam (11) and the short beam (12).

7. The countersunk reinforced structure of the modular assembly type as described in claim 4, characterized in that: The opening (26) is waist-shaped.

8. A modular countersunk reinforced structure as described in any one of claims 1-6, characterized in that: The secondary beam (2) and the short beam (12) are channel steel, and the upper and lower flanges of the long beam (11) and the short beam (12) are provided with second mounting holes (16).

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