A connection structure of an assembled building and a construction method thereof

Abstract

The present invention belongs to the technical field of energy-saving building engineering, and specifically relates to a connection structure of an assembled building and a construction method thereof, wherein the connection structure of the assembled building comprises a No. 1 square tube and a No. 2 square tube, the opposite ends of the No. 1 square tube and the No. 2 square tube are fitted together, and multiple groups of L-shaped plates are fitted together on the outer sides of the No. 1 square tube and the No. 2 square tube, each group of L-shaped plates comprises four L-shaped plates, and the spacing between each L-shaped plate in each group can be fine-tuned according to the building conditions, and can be applicable to square tubes of different sizes, has strong versatility, and high connection strength, and can reduce production costs.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy-saving building engineering, and in particular relates to a connection structure of an assembled building and a construction method thereof. Background Art

[0002] Prefabricated buildings are a form of construction that transfers the heavy and slow on-site work in traditional construction methods to factories for prefabrication. In the factory, the components and accessories required for the building are precisely processed and manufactured, and then transported to the construction site. These components and accessories are assembled and installed on site through special connectors and reliable connection methods to complete the construction of the entire building. Therefore, the structural design and performance of the connectors have a significant impact on ensuring the overall quality of prefabricated buildings.

[0003] A Chinese utility model patent with authorization announcement number CN219175496U and authorization announcement date 2023.06.13 discloses a connection structure of an assembled building, including a mounting seat, a limiting sleeve and a square tube body, wherein the two limiting sleeves are symmetrically fixedly mounted on the two side surfaces of the mounting seat, and the two square tube bodies are respectively slidably sleeved on the outside of the limiting sleeves, and the ends of the square tube bodies are respectively abutted against the two side surfaces of the mounting seat; the four side surfaces of the mounting seat are respectively provided with first grooves, and fixed connecting parts are respectively engaged and installed in the four first grooves, and second grooves are respectively provided on the fixed connecting parts, and the second grooves correspond to the first grooves. Through the tightening effect of the fixed connecting parts and the fastening screws on the four sides of the square tube body, the square tube body is fixed at multiple points, ensuring a more firm connection and improving the load-bearing support effect of the square tube. However, the connection structure of the assembled building still has the following defects when it is actually used:

[0004] 1. In the above technical solution, the size of the mounting seat is fixed, while the size of the building square tube is of various sizes. In order to cope with square tubes of various sizes, it is usually necessary to produce mounting seats of various sizes, which increases the production cost and is difficult to produce;

[0005] 2. In the above technical solution, a single fastening screw is used for connection. However, the fastening screw will age rapidly due to external influences such as rain, and there are no reinforcement measures, so the connection strength cannot be guaranteed, and thus the connection strength between the two square tubes cannot be guaranteed.

[0006] Based on this, the connection structure of the prefabricated building in the prior art cannot meet the existing usage requirements. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a connection structure of an assembled building and a construction method thereof in view of the shortcomings of the prior art. In the present invention, when constructing the connection structure of the assembled building, the spacing between each L-shaped plate in each group can be fine-tuned according to the building conditions, and it can be applicable to square tubes of different sizes, has strong versatility, and high connection strength, and can reduce production costs.

[0008] This solution is achieved through the following technical measures: a connection structure of an assembled building, including a No. 1 square tube and a No. 2 square tube, the opposite ends of the No. 1 square tube and the No. 2 square tube are fitted, and multiple groups of L-shaped plates are fitted on the outer sides of the No. 1 square tube and the No. 2 square tube, each group of L-shaped plates includes four L-shaped plates, side grooves are provided on both sides of the L-shaped plates, a No. 1 connecting plate is fitted on the outer sides of the opposite ends of the No. 1 square tube and the No. 2 square tube, and No. 2 connecting plates are provided on the four sides of the outer walls of the No. 1 square tube and the No. 2 square tube, movable plates are fixedly connected on both sides of the No. 1 connecting plate and the No. 2 connecting plate, one side of the movable plate extends to the corresponding side groove inner cavity, a plurality of No. 1 hidden holes are provided on the L-shaped plate, and a plurality of No. 1 threaded holes are provided on the movable plate, The inner cavity of the No. 1 hidden hole is threadedly connected with a bolt, and one end of the bolt is threadedly connected to the inner cavity of the corresponding No. 1 threaded hole. A plurality of No. 2 threaded holes are provided on the surrounding side walls of the No. 1 square tube and the No. 2 square tube. Two No. 2 hidden holes are provided on the No. 2 connecting plate, and the inner cavities of the two No. 2 hidden holes are both provided with hollow limiting blocks, and one side of the hollow limiting blocks is fixedly connected with a hollow threaded sleeve, one end of the hollow threaded sleeve passes through the No. 2 hidden hole and the corresponding No. 2 threaded hole, and is threadedly connected to the No. 2 threaded hole, and a supporting mechanism is provided in the inner cavity of the hollow threaded sleeve, and two cross bars are fixedly connected between the two No. 2 connecting plates located on both sides of the No. 1 connecting plate, and two round holes are provided on the No. 1 connecting plate, and the cross bars pass through the corresponding round holes.

[0009] Preferably, the support mechanism comprises a round table, which is fixedly connected to the inner cavity of a hollow threaded sleeve, and a vertical rod is fixedly connected to the round table, a ring is sleeved on the outer side of the vertical rod, and a spring is sleeved on the outer side of the vertical rod, and two ends of the spring are respectively fixedly connected to the ring and the round table, and a plurality of push rods are hinged on the outer side of the ring, and a plurality of through grooves are opened on the hollow threaded sleeve, and a movable rod is arranged in the through groove, and a round shaft is installed through the outer side of the movable rod, and two ends of the round shaft are respectively movably connected to the inner wall of the through groove, and a top frame is slidably connected to the outer wall of the movable rod, and one end of the push rod away from the ring penetrates the through groove and is hinged with the corresponding side wall of the movable rod, and a plurality of connecting rods are fixedly connected to the top of the ring, and a round block is fixedly connected to the top of each connecting rod, and a connecting belt is fixedly installed between the top frame and the outer wall of the hollow threaded sleeve, and an inclined pressure block is fixedly installed on the top frame.

[0010] Preferably, two torsion springs are sleeved on the outer side of the circular shaft, and two ends of the two torsion springs are fixedly connected to the side wall of the movable rod and the inner wall of the through groove respectively.

[0011] Preferably, the inner cavity of the No. 1 hidden hole is threadedly connected to a No. 1 hidden cover, the outer side of the bolt is located in the inner cavity of the No. 1 hidden cover, and a No. 1 cross slot is provided on the No. 1 hidden cover.

[0012] Preferably, the inner cavity of the No. 2 hidden hole is threadedly connected with a No. 2 hidden cover, the hollow limit block is located in the inner cavity of the No. 2 hidden cover, and the No. 2 hidden cover is provided with a No. 2 cross slot.

[0013] Preferably, an angle steel is fixedly connected to the inner wall of the L-shaped plate, and the inner wall of the angle steel is fitted with the outer side of the No. 1 square tube.

[0014] Preferably, the plurality of No. 2 threaded holes are evenly distributed.

[0015] The present invention also provides a construction method of the connection structure of the above-mentioned prefabricated building, comprising the following steps:

[0016] S1: Adjust the position of the L-shaped plate according to the No. 1 square tube and the No. 2 square tube of different sizes: pull each L-shaped plate of each group so that the multiple L-shaped plates move outward respectively, and the movable plate slides inside the corresponding side groove when the L-shaped plate moves. After the multiple L-shaped plates are moved to the appropriate position, install the bolts in the corresponding No. 1 hidden hole and No. 1 threaded hole, and thread the No. 1 hidden cover inside the No. 1 hidden hole;

[0017] S2: Repeat step S1 to adjust the positions of the remaining groups of L-shaped plates;

[0018] S3: Pass the No. 1 square tube and the No. 2 square tube through each set of L-shaped plates, and make the butt ends of the No. 1 square tube and the No. 2 square tube be located at the No. 1 connecting plate, and the angle steel inside the L-shaped plate is closely attached to the outer wall of the No. 1 square tube and the No. 2 square tube, and use the cross bar and the round hole to adjust the position of the corresponding two L-shaped plates;

[0019] S4: Press the round block, so that the round block drives multiple connecting rods to move, and each connecting rod jointly drives the collar to move. The collar compresses the spring and drives multiple push rods to move. The push rod drives the corresponding movable rods to close. The movable rod compresses the two outer torsion springs and drives the top frame to close. The hollow threaded sleeve extends into the corresponding No. 1 square tube or No. 2 square tube through the No. 2 hidden hole and the corresponding No. 2 threaded hole, and the hollow limit block is located inside the No. 2 hidden hole;

[0020] S5: Loosen the round block, so that the round block, the movable rod and the top frame are reset under the action of the spring and multiple torsion springs, the multiple movable rods and the top frame are expanded outward, and the top frame is fitted with the inner wall of the No. 1 square tube or the No. 2 square tube. The top frame tilts under the action of the connecting belt. When the top frame deflects to a horizontal state, the pressure block fits with the outer wall of the movable rod, the hollow threaded sleeve is limited, and the No. 2 hidden cover is threadedly installed inside the No. 2 hidden hole;

[0021] S6: Repeat steps S4-S5 until all hollow limit blocks and hollow threaded sleeves are installed, so as to achieve the docking and fixation of the No. 1 square tube and the No. 2 square tube.

[0022] Beneficial effects of the present invention:

[0023] 1. In the present invention, by providing an L-shaped plate, a movable plate, a No. 1 threaded hole and a No. 1 hidden cover, when dealing with square tubes of different sizes, the spacing between each L-shaped plate in each group can be fine-tuned, which can be applicable to square tubes of different sizes and reduce production costs;

[0024] 2. In the present invention, by providing the round block, spring, torsion spring and top frame, the round block, movable rod and top frame can be folded during installation, and can be automatically reset after safety is completed, which is convenient for installation, and can effectively prevent the hollow threaded sleeve from detaching, thereby improving the fixing strength;

[0025] 3. In the present invention, by providing a No. 1 connecting plate, a No. 2 connecting plate and a cross bar, during installation, the distance between the two No. 2 connecting plates on both sides of the No. 1 connecting plate can be adjusted according to actual conditions, which can be applicable to different building conditions and has good adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the connection structure of the prefabricated building in the present invention;

[0027] Figure 2 The local structure of the connection structure of the prefabricated building in the present invention is shown in FIG. Figure 1 ;

[0028] Figure 3 The local structure of the connection structure of the prefabricated building in the present invention is shown in FIG. Figure 2 ;

[0029] Figure 4 It is a structural schematic diagram of the No. 1 connecting plate;

[0030] Figure 5 It is a schematic diagram of the cross-sectional structure at the L-shaped plate;

[0031] Figure 6 It is a structural schematic diagram of the No. 2 connecting plate;

[0032] Figure 7is a structural schematic diagram of the second connecting plate;

[0033] Figure 8 for Figure 7 Schematic diagram of the local structure in;

[0034] Fig. 9 It is a structural schematic diagram of the threaded sleeve;

[0035] Fig.10 It is a schematic diagram of the internal structure of the threaded sleeve;

[0036] Fig.11 It is a structural schematic diagram of the movable rod and the top frame.

[0037] [Reference Signs]

[0038] 1. Square tube No. 1; 2. Square tube No. 2; 3. L-shaped plate; 4. Hidden hole No. 1; 5. Hidden cover No. 1; 6. Cross slot No. 1; 7. Side slot; 8. Movable plate; 9. Bolt; 10. Connecting plate No. 1; 11. Angle steel; 12. Cross bar; 13. Connecting plate No. 2; 14. Hidden hole No. 2; 15. Hidden cover No. 2; 16. Cross slot No. 2; 17. Threaded hole No. 2; 18. Hollow limit block; 19. Hollow threaded sleeve; 20. Through slot; 21. Round table; 22. Movable rod; 23. Top frame; 24. Round shaft; 25. Torsion spring; 26. Push rod; 27. Ring; 28. Spring; 29. ​​Connecting rod; 30. Vertical rod; 31. Round block; 32. Round hole; 33. Threaded hole No. 1; 34. Connecting belt; 35. Pressure block. DETAILED DESCRIPTION

[0039] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods and in conjunction with the accompanying drawings.

[0040] A connection structure of an assembled building, comprising a No. 1 square tube 1 and a No. 2 square tube 2, the opposite ends of the No. 1 square tube 1 and the No. 2 square tube 2 are fitted together, and multiple groups of L-shaped plates 3 are fitted together on the outer sides of the No. 1 square tube 1 and the No. 2 square tube 2, each group of L-shaped plates 3 comprises four L-shaped plates 3, both sides of the L-shaped plates 3 are provided with side grooves 7, a No. 1 connecting plate 10 is fitted together with the outer sides of the opposite ends of the No. 1 square tube 1 and the No. 2 square tube 2, and No. 2 connecting plates 13 are provided on the four sides of the outer walls of the No. 1 square tube 1 and the No. 2 square tube 2, both sides of the No. 1 connecting plate 10 and the No. 2 connecting plate 13 are fixedly connected with movable plates 8, one side of the movable plate 8 extends to the inner cavity of the corresponding side groove 7, a plurality of No. 1 hidden holes 4 are provided on the L-shaped plate 3, a plurality of No. 1 threaded holes 33 are provided on the movable plate 8, the inner cavity of the No. 1 hidden hole 4 is threadedly connected with bolts 9, and the bolts 9 are connected to the inner cavity of the No. 1 hidden hole 4. The end threads are connected to the corresponding inner cavity of the No. 1 threaded hole 33, and multiple No. 2 threaded holes 17 are provided on the side walls around the No. 1 square tube 1 and the No. 2 square tube 2, and several No. 2 threaded holes 17 are evenly distributed. Two No. 2 hidden holes 14 are provided on the No. 2 connecting plate 13, and the inner cavities of the two No. 2 hidden holes 14 are both provided with hollow limit blocks 18. A hollow threaded sleeve 19 is fixedly connected to one side of the hollow limit block 18. One end of the hollow threaded sleeve 19 passes through the No. 2 hidden hole 14 and the corresponding No. 2 threaded hole 17, and is threadedly connected to the No. 2 threaded hole 17, and a supporting mechanism is provided in the inner cavity of the hollow threaded sleeve 19. Two cross bars 12 are fixedly connected between the two No. 2 connecting plates 13 on both sides of the No. 1 connecting plate 10. Two circular holes 32 are provided on the No. 1 connecting plate 10, and the cross bar 12 passes through the corresponding circular holes 32.

[0041] like Figure 8 , Fig. 9 and Fig.10 As shown, the support mechanism includes a truncated table 21, which is fixedly connected to the inner cavity of the hollow threaded sleeve 19, and a vertical rod 30 is fixedly connected to the truncated table 21, a collar 27 is sleeved on the outer side of the vertical rod 30, and a spring 28 is sleeved on the outer side of the vertical rod 30, and the two ends of the spring 28 are respectively fixedly connected to the collar 27 and the truncated table 21, and a plurality of push rods 26 are hinged on the outer side of the collar 27, and a plurality of through grooves 20 are opened on the hollow threaded sleeve 19, and a movable rod 22 is arranged in the through groove 20, and a round shaft 24 is installed on the outer side of the movable rod 22, and the two ends of the round shaft 24 are respectively movably connected to the inner wall of the through groove 20, and the movable rod 2 A top frame 23 is slidably connected to the outer wall of the hollow threaded sleeve 19, one end of the push rod 26 away from the collar 27 passes through the through groove 20 and is hinged to the side wall of the corresponding movable rod 22, a plurality of connecting rods 29 are fixedly connected to the top of the collar 27, and a round block 31 is fixedly connected to the top of each connecting rod 29, a connecting belt 34 is fixedly installed between the top frame 23 and the outer wall of the hollow threaded sleeve 19, and an inclined pressing block 35 is fixedly installed on the top frame 23, through which the connection between the hollow threaded sleeve 19 and the first square tube 1 or the second square tube 2 can be blocked and supported, effectively avoiding separation and improving the connection strength.

[0042] like Figure 8 , Fig. 9 and Fig.10 As shown, two torsion springs 25 are sleeved on the outside of the circular shaft 24, and the two ends of the two torsion springs 25 are respectively fixedly connected to the side walls of the movable rod 22 and the inner wall of the through groove 20. Through this arrangement, when the push rod 26 pushes the movable rod 22, the movable rod 22 drives the circular shaft 24 to compress the two torsion springs 25, and the elastic force of the torsion springs 25 can be used to further enable the top frame 23 to better fit tightly against the inner walls of the No. 1 square tube 1 and the No. 2 square tube 2 to achieve support.

[0043] like Figure 3 , Figure 4 and Figure 5 As shown, the inner cavity of the No. 1 hidden hole 4 is threadedly connected to a No. 1 hidden cover 5, the outer side of the bolt 9 is located in the inner cavity of the No. 1 hidden cover 5, and a No. 1 cross slot 6 is provided on the No. 1 hidden cover 5. Through this arrangement, the bolt 9 installed inside the No. 1 hidden hole 4 can be protected, and the arrangement of the No. 1 cross slot 6 facilitates subsequent disassembly.

[0044] like Figure 7 and Figure 8 As shown, the inner cavity of the No. 2 hidden hole 14 is threadedly connected with a No. 2 hidden cover 15, the hollow limit block 18 is located in the inner cavity of the No. 2 hidden cover 15, and the No. 2 hidden cover 15 is provided with a No. 2 cross groove 16. Through this arrangement, the hollow limit block 18 and the hollow threaded sleeve 19 and other components inside the No. 2 hidden hole 14 can be protected, and the arrangement of the No. 2 cross groove 16 facilitates the subsequent disassembly work.

[0045] like Figure 1 , Figure 2 and Figure 3 As shown, an angle steel 11 is fixedly connected to the inner wall of the L-shaped plate 3, and the inner wall of the angle steel 11 fits with the outer side of the first square tube 1. This arrangement improves the fit between the L-shaped plate 3 and the first square tube 1 and the second square tube 2.

[0046] The present invention also provides a construction method of the connection structure of the above-mentioned prefabricated building, comprising the following steps:

[0047] S1: Adjust the position of the L-shaped plate 3 according to the No. 1 square tube 1 and the No. 2 square tube 2 of different sizes: pull each L-shaped plate 3 of each group so that the multiple L-shaped plates 3 move outward respectively, and the movable plate 8 slides inside the corresponding side groove 7 when the L-shaped plate 3 moves. After the multiple L-shaped plates 3 are moved to the appropriate position, the bolt 9 is installed in the corresponding No. 1 hidden hole 4 and the No. 1 threaded hole 33, and the No. 1 hidden cover 5 is threadedly connected inside the No. 1 hidden hole 4 to achieve hidden protection for the bolt 9, effectively improving the service life of the bolt 9;

[0048] S2: Repeat step S1 to adjust the positions of the remaining groups of L-shaped plates 3;

[0049] S3: Pass the first square tube 1 and the second square tube 2 through each set of L-shaped plates 3, and make the butt ends of the first square tube 1 and the second square tube 2 located at the first connecting plate 10, and the angle steel 11 inside the L-shaped plate 3 is closely attached to the outer walls of the first square tube 1 and the second square tube 2, and use the cross bar 12 and the round hole 32 to adjust the positions of the corresponding two L-shaped plates 3 to avoid obstruction by the building;

[0050] S4: Press the round block 31, so that the round block 31 drives the multiple connecting rods 29 to move, and the connecting rods 29 jointly push the collar 27 to move, and the collar 27 compresses the spring 28 and drives the multiple push rods 26 to move, and the push rods 26 drive the corresponding movable rods 22 to close, and the movable rods 22 compress the two outer torsion springs 25 and drive the top frame 23 to close, and the hollow threaded sleeve 19 extends into the corresponding No. 1 square tube 1 or No. 2 square tube 2 through the No. 2 hidden hole 14 and the corresponding No. 2 threaded hole 17, and the hollow limit block 18 is located inside the No. 2 hidden hole 14;

[0051] S5: Loosen the round block 31, so that the round block 31, the movable rod 22 and the top frame 23 are reset under the action of the spring 28 and the multiple torsion springs 25, and the multiple movable rods 22 and the top frame 23 are expanded outward, and the top frame 23 is fitted with the inner wall of the No. 1 square tube 1 or the No. 2 square tube 2. The top frame 23 tilts under the action of the connecting belt 34. When the top frame 23 deflects to a horizontal state, the pressing block 35 fits with the outer wall of the movable rod 22, and the hollow threaded sleeve 19 is limited, which effectively prevents the hollow threaded sleeve 19 from detaching, improves the fixing strength, and the No. 2 hidden cover 15 is threadedly installed inside the No. 2 hidden hole 14;

[0052] S6: Repeat steps S4-S5 until all hollow limit blocks 18 and hollow threaded sleeves 19 are installed, so that the first square tube 1 and the second square tube 2 are docked and fixed.

[0053] Technical features not described in the present invention can be implemented by existing technologies and will not be described in detail here. The present invention is not limited to the above specific embodiments, and changes, modifications, additions or substitutions made by ordinary technicians in the field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A connection structure of an assembled building, characterized in that: The invention comprises a first square tube (1) and a second square tube (2), wherein the first square tube (1) and the second square tube (2) are bonded to each other at opposite ends, and a plurality of groups of L-shaped plates (3) are bonded to each other on the outer sides of the first square tube (1) and the second square tube (2), wherein each group of L-shaped plates (3) comprises four L-shaped plates (3), and side grooves (7) are provided on both sides of the L-shaped plates (3). A first connecting plate (10) is bonded to the outer sides of the first square tube (1) and the second square tube (2), and the first square tube (1) and the second square tube (2) are bonded to each other at opposite ends. A No. 2 connecting plate (13) is disposed on the four sides of the outer wall of the No. 1 and No. 2 square tubes (2); both sides of the No. 1 connecting plate (10) and the No. 2 connecting plate (13) are fixedly connected with movable plates (8); one side of the movable plate (8) extends to the inner cavity of the corresponding side groove (7); a plurality of No. 1 hidden holes (4) are opened on the L-shaped plate (3); a plurality of No. 1 threaded holes (33) are opened on the movable plate (8); the inner cavity of the No. 1 hidden hole (4) is threadedly connected with a bolt (9 ), one end of the bolt (9) is threadedly connected to the inner cavity of the corresponding No. 1 threaded hole (33), a plurality of No. 2 threaded holes (17) are provided on the side walls of the No. 1 square tube (1) and the No. 2 square tube (2), two No. 2 hidden holes (14) are provided on the No. 2 connecting plate (13), and the inner cavities of the two No. 2 hidden holes (14) are provided with hollow limit blocks (18), one side of the hollow limit blocks (18) is fixedly connected with a hollow threaded sleeve (19), one end of the hollow threaded sleeve (19) passes through the No. 2 hidden hole (14) and the corresponding No. 2 threaded hole (17), and is threadedly connected to the No. 2 threaded hole (17), and the inner cavity of the hollow threaded sleeve (19) is provided with a supporting mechanism, and two cross bars (12) are fixedly connected between the two No. 2 connecting plates (13) located on both sides of the No. 1 connecting plate (10), and two round holes (32) are provided on the No. 1 connecting plate (10), and the cross bars (12) pass through the corresponding round holes (32).

2. The connection structure of the prefabricated building according to claim 1, characterized in that: The support mechanism comprises a truncated table (21), the truncated table (21) is fixedly connected to the inner cavity of the hollow threaded sleeve (19), and a vertical rod (30) is fixedly connected to the truncated table (21), a collar (27) is sleeved on the outer side of the vertical rod (30), and a spring (28) is sleeved on the outer side of the vertical rod (30), two ends of the spring (28) are respectively fixedly connected to the collar (27) and the truncated table (21), a plurality of push rods (26) are hinged on the outer side of the collar (27), a plurality of through grooves (20) are formed on the hollow threaded sleeve (19), a movable rod (22) is arranged in the through grooves (20), and a spring (28) is installed on the outer side of the movable rod (22) through the sleeve (27). A round shaft (24), the two ends of the round shaft (24) are respectively movably connected to the inner wall of the through groove (20), a top frame (23) is slidably connected to the outer wall of the movable rod (22), one end of the push rod (26) away from the collar (27) passes through the through groove (20) and is hinged to the side wall of the corresponding movable rod (22), a plurality of connecting rods (29) are fixedly connected to the top of the collar (27), and a round block (31) is fixedly connected to the top of each connecting rod (29), a connecting belt (34) is fixedly installed between the top frame (23) and the outer wall of the hollow threaded sleeve (19), and an inclined pressing block (35) is fixedly installed on the top frame (23).

3. The connection structure of the prefabricated building according to claim 2, characterized in that: Two torsion springs (25) are sleeved on the outer side of the circular shaft (24), and two ends of the two torsion springs (25) are respectively fixedly connected to the side wall of the movable rod (22) and the inner wall of the through groove (20).

4. The connection structure of the prefabricated building according to claim 3, characterized in that: The inner cavity of the No. 1 hidden hole (4) is threadedly connected to a No. 1 hidden cover (5), the outer side of the bolt (9) is located in the inner cavity of the No. 1 hidden cover (5), and the No. 1 hidden cover (5) is provided with a No. 1 cross slot (6).

5. The connection structure of the prefabricated building according to claim 4, characterized in that: The inner cavity of the No. 2 hidden hole (14) is threadedly connected to a No. 2 hidden cover (15), the hollow limit block (18) is located in the inner cavity of the No. 2 hidden cover (15), and the No. 2 hidden cover (15) is provided with a No. 2 cross slot (16).

6. The connection structure of the prefabricated building according to claim 5, characterized in that: An angle steel (11) is fixedly connected to the inner wall of the L-shaped plate (3), and the inner wall of the angle steel (11) is in contact with the outer side of the first square tube (1).

7. The connection structure of the prefabricated building according to claim 6, characterized in that: The plurality of second threaded holes (17) are evenly distributed.

8. A construction method for the connection structure of the prefabricated building according to claim 7, characterized in that: The steps include: S1: Adjust the position of the L-shaped plate (3) according to the No. 1 square tube (1) and the No. 2 square tube (2) of different sizes: pull each L-shaped plate (3) in each group so that the multiple L-shaped plates (3) move outward respectively, and when the L-shaped plates (3) move, the movable plate (8) slides inside the corresponding side groove (7). After the multiple L-shaped plates (3) are moved to a suitable position, the bolt (9) is installed in the corresponding No. 1 hidden hole (4) and the No. 1 threaded hole (33), and the No. 1 hidden cover (5) is threadedly connected to the inside of the No. 1 hidden hole (4); S2: repeat step S1 to adjust the positions of the remaining groups of L-shaped plates (3); S3: Pass the first square tube (1) and the second square tube (2) through each set of L-shaped plates (3), and make the butt ends of the first square tube (1) and the second square tube (2) be located at the first connecting plate (10), and the angle steel (11) inside the L-shaped plate (3) is closely attached to the outer walls of the first square tube (1) and the second square tube (2), and adjust the positions of the corresponding two L-shaped plates (3) using the cross bar (12) and the circular hole (32); S4: Pressing the round block (31) causes the round block (31) to drive the plurality of connecting rods (29) to move, and the connecting rods (29) jointly push the collar (27) to move, and the collar (27) compresses the spring (28) and drives the plurality of push rods (26) to move, and the push rods (26) drive the corresponding movable rods (22) to retract, and the movable rods (22) compress the two outer torsion springs (25) and drive the top frame (23) to retract, and the hollow threaded sleeve (19) extends into the corresponding No. 1 square tube (1) or No. 2 square tube (2) through the No. 2 hidden hole (14) and the corresponding No. 2 threaded hole (17), and causes the hollow limit block (18) to be located inside the No. 2 hidden hole (14); S5: The round block (31) is loosened, so that the round block (31), the movable rod (22) and the top frame (23) are reset under the action of the spring (28) and the plurality of torsion springs (25), the plurality of movable rods (22) and the top frame (23) are expanded outward, and the top frame (23) is fitted with the inner wall of the No. 1 square tube (1) or the No. 2 square tube (2), and the top frame (23) is tilted under the action of the connecting belt (34). When the top frame (23) is deflected to a horizontal state, the pressing block (35) is fitted with the outer wall of the movable rod (22), the hollow threaded sleeve (19) is limited, and the No. 2 hidden cover (15) is threadedly installed inside the No. 2 hidden hole (14); S6: Repeat steps S4-S5 until all hollow limit blocks (18) and hollow threaded sleeves (19) are installed, thereby achieving the docking and fixing of the No. 1 square tube (1) and the No. 2 square tube (2).

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