Fabricated building steel structure connecting joint

Abstract

The invention relates to the technical field of fabricated buildings, and provides a fabricated building steel structure connecting joint which comprises a vertical steel structure, mounting sleeves are arranged on the two sides of the outer wall of the vertical steel structure in a sleeving mode, a positioning sleeve is horizontally arranged on one side of each mounting sleeve in a sliding mode, and a horizontal steel structure is inserted into each positioning sleeve. The two sides of the positioning sleeve are connected with abutting frames through folding assemblies, so that the abutting frames are folded to abut against and connect the horizontal steel structure and the bolt set of the mounting sleeve, and looseness of the bolt set for stable connection is reduced when the steel structure shakes. The supporting frame is matched with the connecting bolt in an abutting mode, a rigid supporting face is formed, vibration impact in the horizontal direction and the vertical direction is effectively resisted, a secondary safety system is formed by the double-spring-piece self-locking mechanism and the pulling assembly, automatic compensation and locking can be achieved when main connection is stressed, and the joint has the excellent shaking-resisting and deviation-resisting capacity.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building technology, specifically to a steel structure connection node for prefabricated buildings. Background Technology

[0002] Prefabricated steel structure buildings can have some or all of their components manufactured in a prefabrication plant, then transported to the construction site using appropriate transportation methods, and assembled using reliable installation methods and machinery. Safety, reliability, and improved work efficiency are the biggest advantages of prefabricated steel structures.

[0003] With the rapid development of prefabricated building technology, steel structures have become the mainstream structural form due to their advantages such as high strength, fast construction, and recyclability. However, existing steel structure connection nodes mostly use single bolt connections or welding fixation, which have problems such as difficult installation and positioning, low on-site construction efficiency, and insufficient resistance to loosening. Therefore, a new type of steel structure connection node for prefabricated buildings is needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a prefabricated building steel structure connection node, which solves the problems of existing steel structure connection nodes mostly using single bolt connections or welding fixation, resulting in difficulties in installation and positioning, low on-site construction efficiency, and insufficient anti-loosening performance of the connection.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A prefabricated building steel structure connection node includes a vertical steel structure. Mounting sleeves are fitted on both sides of the outer wall of the vertical steel structure. A positioning sleeve slides horizontally on one side of each mounting sleeve. A horizontal steel structure is inserted into the interior of the positioning sleeve. Both sides of the positioning sleeve are connected to clamping frames via closing components. Closing the clamping frames tightens the bolt group connecting the horizontal steel structure and the mounting sleeve, reducing loosening of the bolt group when the steel structure sways. Fixing frames are fixedly connected to adjacent sides of the clamping frames on both sides. The two fixing frames interlock and are connected and fixed by a pull-triggered insertion component, and balanced and further fixed by a pulling component.

[0007] Preferably, the bolt group includes a connecting bolt, the two ends of which pass through the horizontal steel structure and the mounting sleeve in sequence, and are threadedly connected to a fixing sleeve, the fixing sleeve abutting against the mounting sleeve.

[0008] Preferably, the outer wall of the connecting bolt has a vertical groove that abuts against the clamping frame to increase contact friction and enhance the abutment strength.

[0009] Preferably, the closing assembly includes multiple rotating seats that are fixedly connected to both sides of the mounting sleeve. Each rotating seat on opposite sides is rotatably connected to a connecting rod, and the end of the connecting rod away from the rotating seat is rotatably connected to the clamping frame.

[0010] Preferably, the plug-in assembly includes a groove formed inside the fixed frame, a fixed seat is fixedly connected inside the groove, the pull buckle is rotatably connected to one end of the fixed frame, and an arc-shaped head is provided at the end of the pull buckle near the fixed seat to abut against the limiting plug connected by the spring sheet group, so that the spring sheet pushes the limiting plug and inserts it into the limiting socket formed on the outer wall of the fixed frame.

[0011] Preferably, the spring sheet assembly includes a spring sheet one located inside the groove, the spring sheet being sleeved on the outer wall of the fixing seat, and a spring sheet two being provided inside, the middle end of the spring sheet two being sleeved on the outer wall of the fixing seat, one side of the spring sheet two abutting against the inner wall of the groove, and the other end of the spring sheet two being fixedly connected to the limiting plug.

[0012] Preferably, the pulling assembly includes a groove formed on the outer wall of the fixed frame, a sliding seat that slides horizontally inside the groove via a spring, a connecting ring that is rotatably connected to one side of the sliding seat, a buckle that is fixedly connected to one side of the pulling buckle, and the end of the connecting ring away from the sliding seat.

[0013] Preferably, one end of the spring is connected to the sliding seat, and the other end of the spring is connected to the sliding groove.

[0014] Preferably, the other side of the mounting sleeve is fixed to the vertical steel structure by fixing bolts.

[0015] An assembly method for steel structure connection nodes in prefabricated buildings includes the following steps:

[0016] Step 1: Place the two mounting sleeves on the outer wall of the vertical steel structure, align them with the pre-installed holes, and use fixing bolts to firmly fix the mounting sleeves to the vertical steel structure.

[0017] Step 2: Position the horizontal steel structure along the slot on the positioning sleeve, insert it into the positioning sleeve, and place it on the side where the vertical steel structure needs to be installed.

[0018] Step 3: Insert the connecting bolts through the pre-installed holes on the horizontal steel structure and the mounting sleeve, and tighten the connecting bolts with fixing sleeves at both ends to firmly fix the horizontal steel structure.

[0019] Step 4: Push the positioning sleeve to move it. During the movement, the clamping frame and the fixing frame will close together under the action of the connecting rod. The connecting rod will pull the clamping frame to the position of the connecting bolt, and the closed fixing frames will mesh together.

[0020] Step 5: Fasten the connecting ring adjacent to the pull buckle into the buckle seat;

[0021] Step 6: Rotate the pull buckle so that its arc part compresses the first spring plate, the first spring plate squeezes the second spring plate, and the second spring plate pushes the limit plug to move and insert into the limit socket; at the same time, the pull buckle pulls the buckle seat and the connecting ring, the connecting ring pulls the sliding seat and the spring, and the spring tension and the spring plate return force reach a balance, locking the pull buckle and the connecting ring.

[0022] Step 7: Securely fix the fixing frame and its connected clamping frame. The clamping frame applies a counterforce to the connecting bolts to prevent the steel structure connection from shaking or shifting, which could cause the connection structure to loosen.

[0023] Working Principle: When assembling the steel structure of a prefabricated building, firstly, two mounting sleeves are fitted onto the outer wall of the vertical steel structure, aligning with the pre-drilled holes on the vertical steel structure. The mounting sleeves are then fixed to the vertical steel structure using fixing bolts. Next, the horizontal steel structure is inserted into the positioning sleeve along the slot on the positioning sleeve, positioned on the side of the vertical steel structure where it is to be installed. Connecting bolts are then passed through the pre-drilled holes on the horizontal steel structure and mounting sleeve, and tightened at both ends using fixing threaded sleeves, thus fixing the horizontal steel structure. Then, the positioning sleeve is pushed, causing it to shift. During this shift, the clamping frame, along with the connected fixing frame, closes under the action of the connecting rod. The connecting rod pulls the clamping frame towards the position of the connecting bolt, and the closed fixing frames interlock. Then, the... The connecting ring adjacent to the pull buckle is fastened into the buckle seat. Rotating the pull buckle causes the arc portion on the pull buckle to abut against the first spring plate, compressing the first spring plate and squeezing the second spring plate inside. The compressed second spring plate applies force to the limiting insert, causing it to displace and insert into the limiting socket. The rotating pull buckle pulls the buckle seat, causing the buckle seat and the connecting ring inside the pull buckle to pull the sliding seat. The sliding seat pulls the spring connected to it. The tension of the spring balances the return force of the first and second spring plates, making the pull buckle and the connecting ring balanced and preventing the pull buckle and the connecting ring from returning to their original positions. This ensures that the fixing frame and its connected clamping frame are firmly fixed. The clamping frame applies abutting force to the connecting bolts to prevent the steel structure connection from shaking or shifting, which could cause the connecting bolts to shift and loosen the connection structure.

[0024] This invention provides a connection node for prefabricated building steel structures. It has the following advantages:

[0025] 1. The present invention forms a rigid support surface by abutting the clamping frame and connecting bolts, which effectively resists vibration and impact in the horizontal and vertical directions. Furthermore, the secondary safety system composed of the double spring plate self-locking mechanism and the tensioning component can automatically compensate and lock when the main connection is under force, giving the node excellent anti-shaking and anti-displacement capabilities, significantly improving the overall stability and durability of the structure, and reducing later maintenance costs and safety risks.

[0026] 2. This invention enables rapid positioning and assembly of horizontal and vertical steel structures. The pull-driven plug-in assembly and the fixing frame engagement mechanism form a modular locking, eliminating the need for repeated tightening with multiple bolts, simplifying the operation process, shortening the installation cycle, and significantly improving assembly efficiency by completing multiple fixings in one step. Attached Figure Description

[0027] Figure 1 This is a perspective view of the present invention;

[0028] Figure 2 This is a schematic diagram showing the position of the connecting bolts in this invention;

[0029] Figure 3 This is a schematic diagram showing the positions of the clamping frame and the connecting bolts of the present invention;

[0030] Figure 4 This is a schematic diagram of the connecting structure of the linkage of the present invention;

[0031] Figure 5 This is a schematic diagram of the clamping frame of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the fixing frame of the present invention;

[0033] Figure 7 This is a schematic diagram of the detachable structure of the fixing frame of the present invention;

[0034] Figure 8 This is a schematic diagram showing the position of the spring sheet of the present invention;

[0035] Figure 9 This is a schematic diagram showing the position of the second spring sheet of the present invention.

[0036] The components are as follows: 1. Vertical steel structure; 2. Horizontal steel structure; 3. Mounting sleeve; 4. Positioning sleeve; 5. Connecting bolt; 6. Fixing screw sleeve; 7. Clamping frame; 8. Connecting rod; 9. Rotary seat; 10. Fixing frame; 11. Pull buckle; 12. Buckle seat; 13. Connecting ring; 14. Sliding seat; 15. Fixing seat; 16. Spring plate one; 17. Spring plate two; 18. Limiting plug; 19. Limiting socket; 20. Fixing bolt. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example:

[0039] As part of this application, please refer to the appendix. Figure 1 -Appendix Figure 3 This invention provides a prefabricated building steel structure connection node, including a vertical steel structure 1. Mounting sleeves 3 are fitted on both sides of the outer wall of the vertical steel structure 1. A positioning sleeve 4 slides horizontally on one side of the mounting sleeve 3. The other side of the mounting sleeve 3 is fixed to the vertical steel structure 1 by fixing bolts 20. A horizontal steel structure 2 is inserted into the positioning sleeve 4. Both sides of the positioning sleeve 4 are connected to a clamping frame 7 via a closing assembly. The clamping frame 7 clamps the bolt group connecting the horizontal steel structure 2 and the mounting sleeve 3 to reduce loosening of the bolt group used for stable connection when the steel structure shakes. A fixing frame 10 is fixedly connected to the adjacent side of the clamping frame 7 on both sides. The two fixing frames 10 interlock and are connected and fixed by an insertion assembly triggered by a pull buckle 11, and balanced and further fixed by a pulling assembly.

[0040] Specifically, both the vertical steel structure 1 and the horizontal steel structure 2 are standard steel structure components that meet the requirements for prefabricated buildings, possessing the strength and load-bearing capacity to meet standards for the construction of prefabricated buildings. During the assembly of the steel structures, firstly, two mounting sleeves 3 are fitted onto the outer wall of the vertical steel structure 1, aligned with the pre-drilled holes on the vertical steel structure 1. The mounting sleeves 3 are then fixed to the vertical steel structure 1 using fixing bolts 20. Next, the horizontal steel structure 2 is inserted into the positioning sleeve 4 through the slots on the positioning sleeve 4, and positioned on the side of the vertical steel structure 1 where it is to be installed. The pre-drilled holes are made according to the required splicing positions of the steel structures.

[0041] Please see the appendix Figure 3 -Appendix Figure 5 The bolt assembly includes a connecting bolt 5, with both ends of the connecting bolt 5 passing through the horizontal steel structure 2 and the mounting sleeve 3 in sequence, and a fixing sleeve 6 is threadedly connected to it. The fixing sleeve 6 abuts against the mounting sleeve 3. The outer wall of the connecting bolt 5 has a vertical groove that abuts against the clamping frame 7 to increase contact friction and expand the abutment strength. The closing assembly includes multiple rotating seats 9 that are fixedly connected to both sides of the mounting sleeve 3. A connecting rod 8 is rotatably connected to the opposite side of each rotating seat 9. The end of the connecting rod 8 away from the rotating seat 9 is rotatably connected to the clamping frame 7.

[0042] Specifically, the connecting bolt 5 is passed through the pre-installed holes on the horizontal steel structure 2 and the mounting sleeve 3, and the fixing screw sleeve 6 is tightened on both ends of the connecting bolt 5 to fix the horizontal steel structure 2. Then, the positioning sleeve 4 is pushed to move it. During the movement, the clamping frame 7 and the fixed frame 10 connected to it are closed under the action of the connecting rod 8. The connecting rod 8 pulls the clamping frame 7 to the position of the connecting bolt 5 to abut. After the fixation is completed, the fixed frame 10 and the clamping frame 7 connected to it are firmly fixed. The clamping frame 7 applies abutting force to the connecting bolt 5 to prevent the steel structure connection part from shaking and shifting, which would cause the connecting bolt 5 to shift and loosen the connection structure.

[0043] Please see the appendix Figure 6 Appendix Figure 8 and attached Figure 9 The plug-in assembly includes a groove inside the fixing frame 10, a fixing seat 15 is fixedly connected inside the groove, a pull buckle 11 is rotatably connected to one end of the fixing frame 10, and an arc-shaped head is provided at the end of the pull buckle 11 near the fixing seat 15 for abutting against the limiting plug 18 connected by the spring piece group, so that the spring piece pushes the limiting plug 18 and inserts it into the limiting socket 19 opened on the outer wall of the fixing frame 10. The spring piece group includes a spring piece 16 located inside the groove, the spring piece 16 is sleeved on the outer wall of the fixing seat 15, and a spring piece 17 is provided inside it. The middle end of the spring piece 17 is sleeved on the outer wall of the fixing seat 15, one side of the spring piece 17 abuts against the inner wall of the groove, and the other end of the spring piece 17 is fixedly connected to the limiting plug 18.

[0044] Specifically, rotating the pull buckle 11 causes the arc portion on the pull buckle 11 to abut against the spring plate 16, compressing the spring plate 16 and squeezing the inner spring plate 17. The compressed spring plate 17 then applies force to the limiting plug 18, causing it to displace and insert into the limiting socket 19. The spring plate 16 and the spring plate 17 have a certain rigidity and elasticity, and after being compressed, they can press against the pull buckle 11, applying a force that prevents it from rotating freely.

[0045] Please see the appendix Figure 6 -Appendix Figure 8 The pulling assembly includes a groove on the outer wall of the fixed frame 10. Inside the groove, a sliding seat 14 slides horizontally via a spring. A connecting ring 13 is rotatably connected to one side of the sliding seat 14. A buckle 12 is fixedly connected to one side of the pulling buckle 11. The end of the connecting ring 13 away from the sliding seat 14 is connected to one end of the spring and the other end of the spring is connected to the groove.

[0046] Specifically, before rotating the pull buckle 11, the connecting ring 13 adjacent to the pull buckle 11 is first fastened into the buckle seat 12. During the rotation of the pull buckle 11, the rotating pull buckle 11 pulls the buckle seat 12 on it, causing the buckle seat 12 to engage with the connecting ring 13 inside it, causing the connecting ring 13 to pull the sliding seat 14. The sliding seat 14 pulls the spring connected to it. The tension of the spring is balanced with the reset force of the spring plate 16 and the spring plate 17, so that the pull buckle 11 and the connecting ring 13 are balanced, preventing the pull buckle 11 and the connecting ring 13 from resetting.

[0047] Based on the prefabricated steel structure connection node provided above, as another aspect of this application, a method for assembling a prefabricated steel structure connection node includes the following steps:

[0048] Step 1: Place the two mounting sleeves 3 on the outer wall of the vertical steel structure 1, align them with the pre-installed holes, and use fixing bolts 20 to firmly fix the mounting sleeves 3 to the vertical steel structure 1.

[0049] Step 2: Insert the horizontal steel structure 2 into the positioning sleeve 4 along the slot on the positioning sleeve 4, and place it on the side where the vertical steel structure 1 needs to be installed.

[0050] Step 3: Insert the connecting bolt 5 through the pre-installed holes on the horizontal steel structure 2 and the mounting sleeve 3, and tighten the connecting bolt 5 with the fixing screw sleeve 6 at both ends to firmly fix the horizontal steel structure 2.

[0051] Step 4: Push the positioning sleeve 4 to move it. During the displacement process, the clamping frame 7 and the fixing frame 10 will close together under the action of the connecting rod 8. The connecting rod 8 will pull the clamping frame 7 to abut against the connecting bolt 5, and the closed fixing frame 10 will bite together.

[0052] Step 5: Fasten the connecting ring 13 adjacent to the pull buckle 11 into the buckle seat 12;

[0053] Step 6: Rotate the pull buckle 11 to compress the first spring plate 16 with its arc portion. The first spring plate 16 presses against the second spring plate 17, and the second spring plate 17 pushes the limit plug 18 to move and insert into the limit socket 19. At the same time, the pull buckle 11 pulls the buckle seat 12 and the connecting ring 13. The connecting ring 13 pulls the sliding seat 14 and the spring. The spring tension and the spring plate return force are balanced, locking the pull buckle 11 and the connecting ring 13.

[0054] Step 7: Securely fix the fixing frame 10 and its connected clamping frame 7. The clamping frame 7 applies abutment force to the connecting bolts 5 to prevent the steel structure connection from shaking or shifting, which could cause the connection structure to loosen.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fabricated building steel structure connection joint, characterized by, The utility model provides a vertical steel structure and horizontal steel structure connecting structure, including vertical steel structure (1), both sides of vertical steel structure (1) are sleeved with the installation sleeve (3), one side horizontal sliding of installation sleeve (3) has the positioning sleeve (4), the inside of positioning sleeve (4) is inserted with horizontal steel structure (2), both sides of positioning sleeve (4) are connected with the abutting frame (7) through closing subassembly, to be connected with the bolt group of horizontal steel structure (2) and installation sleeve (3) by closing abutting frame (7) and abutting, to reduce the loosening of bolt group for firm connection when steel structure shakes, and the abutting frame (7) of left and right sides is fixedly connected with the fixed frame (10) in the side similar to each other, and two fixed frame (10) are mutually engaged, and are connected and fixed through the plug-in subassembly of the pull buckle (11) trigger, and are balanced and secondarily fixed through pulling subassembly.

2. The prefabricated building steel structure connecting joint according to claim 1, characterized in that, The bolt group includes a connecting bolt (5), both ends of the connecting bolt (5) are sequentially inserted through the horizontal steel structure (2) and the installation sleeve (3), and the connecting bolt (5) is threadedly connected with a fixed sleeve (6), and the fixed sleeve (6) is abutted against the installation sleeve (3).

3. The prefabricated building steel structure connecting joint according to claim 2, characterized in that, The outer wall of the connecting bolt (5) is provided with a vertical groove, and the vertical groove is abutted against the abutting frame (7) to increase the contact friction and enhance the abutting strength.

4. The prefabricated building steel structure connecting joint according to claim 1, characterized in that, The closing subassembly includes a plurality of rotating seats (9) fixedly connected to both sides of the installation sleeve (3), and both sides of the rotating seat (9) are rotatably connected with a connecting rod (8) on the side away from each other.

5. The prefabricated building steel structure connecting joint according to claim 1, characterized in that, The plug-in subassembly includes a groove formed in the inner part of the fixed frame (10), and a fixed seat (15) is fixedly connected in the inner part of the groove, one end of the pull buckle (11) is rotatably connected with the fixed frame (10), and an arc-shaped head is arranged on the end of the pull buckle (11) close to the fixed seat (15), so as to abut against the limiting plug-in (18) connected by the spring group, to make the spring push the limiting plug-in (18) to be inserted into the limiting insertion port (19) formed in the outer wall of the fixed frame (10).

6. The prefabricated building steel structure connecting joint according to claim 5, characterized in that, The spring group includes a spring sheet one (16) located in the groove, the spring sheet one (16) is sleeved on the outer wall of the fixed seat (15), and a spring sheet two (17) is arranged in the inner part of the spring sheet one (16), the middle end of the spring sheet two (17) is sleeved on the outer wall of the fixed seat (15), one side of the spring sheet two (17) is abutted against the inner wall of the groove, and the other end of the spring sheet two (17) is fixedly connected with the limiting plug-in (18).

7. The prefabricated building steel structure connecting joint according to claim 1, characterized in that, The pulling subassembly includes a sliding groove formed on the outer wall of the fixed frame (10), and a sliding seat (14) is horizontally slidably arranged in the inner part of the sliding groove, one side of the sliding seat (14) is rotatably connected with a connecting ring (13), one side of the pull buckle (11) is fixedly connected with a buckle seat (12), and one end of the connecting ring (13) is away from the sliding seat (14).

8. The prefabricated building steel structure connecting joint according to claim 7, characterized in that, One end of the spring is connected with the sliding seat (14), and the other end of the spring is connected with the sliding groove.

9. The prefabricated building steel structure connecting joint according to claim 1, characterized in that, The other side of the installation sleeve (3) is fixed with the vertical steel structure (1) through a fixed bolt (20).

10. A method for assembling a fabricated building steel structure connection node using the fabricated building steel structure connection node according to any one of claims 1 to 9, characterized in that, The utility model discloses a vertical steel structure and horizontal steel structure connecting structure, including vertical steel structure (1), both sides of vertical steel structure (1) are sleeved with the installation sleeve (3), one side horizontal sliding of installation sleeve (3) has the positioning sleeve (4), the inside of positioning sleeve (4) is inserted with horizontal steel structure (2), both sides of positioning sleeve (4) are connected with the abutting frame (7) through closing subassembly, to be connected with the bolt group of horizontal steel structure (2) and installation sleeve (3) by closing abutting frame (7) and abutting, to reduce the loosening of bolt group for firm connection when steel structure shakes, and the abutting frame (7) of left and right sides is fixedly connected with the fixed frame (10) in the side similar to each other, and two fixed frame (10) are mutually engaged, and are connected and fixed through the plug-in subassembly of the pull buckle (11) trigger, and are balanced and secondarily fixed through pulling subassembly. The utility model discloses a vertical steel structure and horizontal steel structure connecting structure, including vertical steel structure (1), both sides of vertical steel structure (1) are sleeved with the installation sleeve (3), one side horizontal sliding of installation sleeve (3) has the positioning sleeve (4), the inside of positioning sleeve (4) is inserted with horizontal steel structure (2), both sides of positioning sleeve (4) are connected with the abutting frame (7) through closing subassembly, to be connected with the bolt group of horizontal steel structure (2) and installation sleeve (3) by closing abutting frame (7) and abutting, to reduce the loosening of bolt group for firm connection when steel structure shakes, and the abutting frame (7) of left and right sides is fixedly connected with the fixed frame (10) in the side similar to each other, and two fixed frame (10) are mutually engaged, and are connected and fixed through the plug-in subassembly of the pull buckle (11) trigger, and are balanced and secondarily fixed through pulling subassembly. Step one, two installation sets (3) are set on the outer wall of vertical steel structure (1), aligning the pre-installed hole position, and the installation set (3) is firmly fixed on the vertical steel structure (1) with fixing bolts (20); Step two, the horizontal steel structure (2) is positioned and inserted on the positioning sleeve (4) along the slot on the positioning sleeve (4), and is placed on the side of the vertical steel structure (1) required to be installed; Step three, the connecting bolt (5) is inserted through the pre-installed hole of the horizontal steel structure (2) and the installation set (3), and the connecting bolt (5) is tightened with the fixing nut (6) at both ends, so that the horizontal steel structure (2) is firmly fixed; Step four, push the positioning sleeve (4) to displace it, and in the displacement process, the abutting frame (7) cooperates with the fixing frame (10) to be folded under the action of the connecting rod (8), the connecting rod (8) drives the abutting frame (7) to abut against the connecting bolt (5) position, and the folded fixing frame (10) is engaged together; Step five, the connecting ring (13) adjacent to the pulling buckle (11) is buckled into the buckle seat (12); Step six, rotate the pulling buckle (11) to compress the spring sheet one (16), the spring sheet two (17) is extruded by the spring sheet one (16), and the spring sheet two (17) pushes the limiting plug-in part (18) to be inserted into the limiting plug-in part (19); At the same time, the pulling buckle (11) drives the buckle seat (12) and the connecting ring (13), the connecting ring (13) pulls the sliding seat (14) and the spring, the spring tension and the spring sheet reset force reach balance, and the pulling buckle (11) and the connecting ring (13) are locked; Step seven, the fixing frame (10) and the abutting frame (7) connected thereto are firmly fixed, the abutting frame (7) exerts abutting force on the connecting bolt (5), preventing the steel structure connecting part from shaking and shifting to cause the connecting structure to loosen.

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