Quickly assembled and disassembled steel structure

Abstract

The utility model relates to the technical field of steel structure installation in building construction, and discloses a quickly disassembled and assembled steel structure which comprises a first steel block, a third hole is formed in the top of the first steel block, a connecting block is connected to the inner wall of the third hole in a sliding mode, a long column is fixedly connected to the bottom of the right end of the connecting block, and second steel blocks are connected to the outer walls of the front end and the rear end of the long column in a sliding mode. The right side of the top end of the second steel block is fixedly connected with a square plate, a groove is formed in the front end of the square plate, and the inner wall of the groove is in sliding connection with the outer wall of the second short plate. According to the novel steel structure, the connecting block is clamped with the first steel block through the second steel block, then the gear is rotated to drive the L-shaped plate to be clamped with the second hole, the purpose of rapid assembling and fixing is achieved, in this way, the structural stability can be guaranteed, the novel steel structure capable of being efficiently and rapidly assembled and disassembled can be achieved, the input amount of manpower and material resources is reduced, and later maintenance becomes simple.

Description

Technical Field

[0001] This utility model relates to the field of steel structure installation technology in building construction, and in particular to a steel structure that can be quickly assembled and disassembled. Background Technology

[0002] Steel structures are structures made of steel materials, consisting of steel beams, columns, and truss members made of shaped steel and steel plates. They undergo rust removal and prevention processes such as silanization, pure manganese phosphating, water washing and drying, and galvanizing. Currently, in the field of construction engineering, steel structures are widely used in the construction of various buildings due to their high strength and light weight. With the development of society and economy and the progress of technology, the demands for buildings are becoming increasingly diversified, especially in temporary and emergency locations, which place higher demands on the rapid assembly and disassembly of steel structures.

[0003] A quick-assembly and disassembly steel structure achieves rapid assembly and disassembly through a specific connection method and structural design. The design principle of this steel structure is that the cooperation between various components makes the installation and disassembly process simple and convenient, which can greatly save time and manpower. Specifically, the right side of the first support frame overlaps with the left side of the second support frame. Several locking blocks and sliders are fixedly connected to the upper and lower surfaces of the second support frame. During installation, these locking blocks and sliders are fastened through specific grooves and connection methods, and the steel structure can be quickly fixed. When disassembly is required, the position of these components can be easily adjusted to remove the structure.

[0004] A search revealed Chinese Patent Publication No. CN112523427A, which discloses a steel structure column that facilitates rapid assembly and disassembly. The column includes a square column body with an opening on one side; it also includes multiple parallel horizontal plates located within the square column body, each plate having a T-shaped protrusion at both ends. The sidewalls of the square column body have T-shaped grooves for embedding the T-shaped protrusions; vertical plates are provided between adjacent horizontal plates and / or between a horizontal plate and the top plate of the square column and / or between a horizontal plate and the bottom plate of the square column. Compared to existing steel structure connection methods, all connection nodes in this invention's steel structure column are mortise and tenon joints. This connection method facilitates the installation and disassembly of the steel structure column. Therefore, this invention's steel structure column has advantages such as fast connection speed, low connection difficulty, and reusability of disassembled steel structural components. This invention's steel structure column is particularly suitable for quickly constructing low-rise or temporary structures. However, due to the large size of the components, a single worker cannot complete the assembly work independently; multiple people are often required to complete it. Furthermore, due to the large number of connection points, the overall assembly is time-consuming, severely impacting work efficiency. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a quick-assembly and disassembly steel structure, which aims to improve the existing technology where the components are large in size, a single worker cannot complete the assembly work independently, and multiple people are often required to complete it. In addition, due to the large number of connection parts, the overall assembly takes a long time, which seriously affects the work efficiency.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a quick-assembly and disassembly steel structure, comprising a steel block one, a hole three is provided on the top of the steel block one, a connecting block is slidably connected to the inner wall of the hole three, a long column is fixedly connected to the bottom right end of the connecting block, a steel block two is slidably connected to the outer walls of the front and rear ends of the long column, a gear is rotatably connected to the top right of the steel block two, a short plate two is meshed with the outer wall of the gear, a square plate is fixedly connected to the top right of the steel block two, a groove is provided at the front end of the square plate, the inner wall of the groove is slidably connected to the outer wall of the short plate two, an L-shaped plate is fixedly connected to the top of the short plate two, the bottom of the L-shaped plate is slidably connected to the outer wall of the square plate, a hole two is engaged at the top left end of the connecting block, and a protective structure is provided on the left side of the steel block one, the protective structure being used to protect the interface of the steel structure.

[0007] Through the above technical solution: the top of steel block one is designed with three holes, the inner walls of which can be slidably connected with the connecting block. The connecting block is a key component for connecting the various steel blocks. A long column is fixedly connected to the bottom right end of the connecting block. The outer walls of the front and rear ends of the long column can be slidably connected with steel block two, thereby realizing the connection between steel block one and steel block two. A rotating gear is designed on the right side of the top of steel block two. The outer wall of the gear meshes with the inner wall of short plate two, ensuring a tight fit between the gear and short plate two. A square plate is also fixedly connected to the right side of the top of steel block two. A groove is opened at the front end of the square plate. The inner wall of the groove can be slidably connected with the outer wall of short plate two, further enhancing the stability and flexibility of the structure.

[0008] As a further description of the above technical solution:

[0009] The protective structure includes an L-shaped steel frame. The top of the L-shaped steel frame is fixedly connected to the bottom left side of the first steel block. A steel bar is fixedly connected to the bottom left side of the L-shaped steel frame. A support plate is fixedly connected to the rear side of the steel bar. A rotating bar is rotatably connected to the top of the support plate. A long bar is rotatably connected to the right side of the rotating bar. A long bar is rotatably connected to the front end of the long bar. A protective plate is rotatably connected to the bottom end of the long bar. A short plate is rotatably connected to the middle of the protective plate. A protective plate is rotatably connected to the bottom end of the short plate. A long bar is rotatably connected to the rear end of the protective plate. The top of the long bar is rotatably connected to the rear end of the long bar. A hole is provided at the front end of both the protective plate and the protective plate. A locking block engages inside the hole.

[0010] Through the above technical solution: the top of the L-shaped steel frame is fixedly connected to the bottom left side of the steel block one. A steel bar is fixedly connected to the bottom left side of the L-shaped steel frame. A support plate is fixedly connected to the back side of the steel bar. The top of the support plate is connected to a rotating bar by a rotatable connection, so that the rotating bar can rotate freely at the top of the support plate. The right side of the rotating bar is connected to a long bar one by a rotatable connection, so that the long bar one can rotate freely on the right side of the rotating bar. The front end of the long bar one is connected to another long bar two by a rotatable connection, so that the long bar two can rotate freely at the front end of the long bar one. The bottom end of the long bar two is connected to a protective plate one by a rotatable connection, so that the protective plate one can rotate freely at the bottom end of the long bar two.

[0011] As a further description of the above technical solution:

[0012] A handle is fixedly connected to the top of the gear, and a protective sleeve is fixedly connected to the outer wall of the handle.

[0013] Through the above technical solution: the gear of handle one can be easily rotated, and the protective cover on the outer wall of handle one can prevent the hand from slipping and protect the safety of personnel.

[0014] As a further description of the above technical solution:

[0015] A protective block is fixedly connected to the bottom left side of the steel block one, and a U-shaped frame is fixedly connected to the bottom end of the protective block.

[0016] Through the above technical solution: the protective block fixedly connected to the bottom left side of the steel block is used to stabilize the connection part and also plays a certain supporting role; the U-shaped frame fixedly connected to the bottom of the protective block is used for the connection of other structures.

[0017] As a further description of the above technical solution:

[0018] The bottom end of the U-shaped frame is rotatably connected to a pivot, and the top end of the pivot is fixedly connected to a hook.

[0019] Through the above technical solution: the rotating shaft connected to the bottom of the U-shaped frame can drive the rotation of the hook, and the hook can hang some maintenance items.

[0020] As a further description of the above technical solution:

[0021] The front end of the rotating bar is fixedly connected to a handle three, and the outer wall of the handle three is fixedly connected to an anti-slip sleeve.

[0022] The above technical solution involves a handle fixedly connected to the front end of the rotating bar, making its use more convenient. Furthermore, the outer wall is fixedly connected with an anti-slip sleeve, preventing accidents caused by slipping.

[0023] As a further description of the above technical solution:

[0024] The bottom of the connecting block is fixedly connected to a handle, and the front end of the locking block is fixedly connected to a short post.

[0025] The above technical solution involves fixing handle 2 to the bottom of the connecting block for use, and fixing a short post to the front end of the locking block for easy removal and placement.

[0026] As a further description of the above technical solution:

[0027] An interface sleeve is fixedly connected to the outer right side of the steel bar, and the inner wall of the interface sleeve engages with the bottom left side of the L-shaped steel frame.

[0028] The above technical solution involves a connector sleeve fixedly connected to the right outer wall of the steel bar. The inner wall of this connector sleeve is designed with a locking structure that matches the bottom left side of the L-shaped steel frame, allowing the L-shaped steel frame to be securely installed on the right outer wall of the steel bar. The tight connection between the two is achieved through the locking between the inner wall of the connector sleeve and the bottom left side of the L-shaped steel frame.

[0029] This utility model has the following beneficial effects:

[0030] 1. In this utility model, the connecting block is engaged with the first steel block by the second steel block, and then the gear is rotated to drive the L-shaped plate to engage with the second hole at the top of the connecting block, so as to achieve the purpose of quick assembly and fixation. This can ensure structural stability and realize a new type of steel structure that is efficient and quick to assemble and disassemble, reducing the construction cycle of the entire project, reducing the amount of manpower and material resources invested, and making the later maintenance simple.

[0031] 2. In this utility model, by rotating the rotating bar, the first protective plate and the second protective plate will move towards each other. Then, the locking block will engage with the hole, which will fix and protect the L-shaped steel frame and the steel bar interface. The interface is well protected, which can extend its service life by several years, ensure the long-term effectiveness of the connecting parts, and reduce maintenance costs. Attached Figure Description

[0032] Figure 1 A front perspective view of a steel block of a quick-assembly and disassembly steel structure proposed in this utility model;

[0033] Figure 2 This is a side view of a support plate for a steel structure that can be quickly assembled and disassembled according to this utility model.

[0034] Figure 3 This is a disassembled view of the connecting block of a steel structure that can be quickly assembled and disassembled according to this utility model;

[0035] Figure 4The image shows a second steel block of a steel structure for quick assembly and disassembly proposed in this utility model.

[0036] Figure 5 This is a schematic diagram of an L-shaped steel frame for a quick-assembly and disassembly steel structure proposed in this utility model.

[0037] Figure 6 This is a diagram showing the disassembled parts of a steel structure with quick assembly and disassembly proposed in this utility model.

[0038] Legend:

[0039] 1. Steel block one; 2. Protective structure; 201. L-shaped steel frame; 202. Steel bar; 203. Clamping block; 204. Long bar one; 205. Long bar two; 206. Turning bar; 207. Support plate; 208. Long bar three; 209. Protective plate one; 210. Protective plate two; 211. Short plate one; 212. Hole one; 3. Connecting block; 4. Protective block; 5. L-shaped plate; 6. Handle one; 7. Protective sleeve; 8. Gear; 9. Steel block two; 10. Long column; 11. Handle two; 12. Short column; 13. Handle three; 14. Anti-slip sleeve; 15. U-shaped frame; 16. Rotating shaft; 17. Hook; 18. Hole two; 19. Hole three; 20. Short plate two; 21. Square plate; 22. Groove; 23. Interface sleeve. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Please see the appendix Figure 1 Appendix Figure 3 and attached Figure 4This utility model provides an embodiment of a quick-assembly and disassembly steel structure, comprising a steel block 1, a hole 3 19 on the top of the steel block 1, a connecting block 3 slidably connected to the inner wall of the hole 3 19, and a long column 10 fixedly connected to the bottom right end of the connecting block 3. The connecting block 3 is crucial for the quick-assembly and disassembly of this structure. A long column 10 is fixedly connected to the bottom right end of the connecting block 3, and steel blocks 2 9 are slidably connected to the outer walls of the front and rear ends of the long column 10. A gear 8 is rotatably connected to the top right side of steel block 29. A short plate 20 is meshed with the outer wall of gear 8. A square plate 21 is fixedly connected to the top right side of steel block 29. Steel block 29 is slidably connected to the outer walls of the front and rear ends of long column 10. A gear 8 is rotatably connected to the top right side of steel block 29. The outer wall of gear 8 meshes with the inner wall of short plate 20, thus achieving precise transmission and fixation. A square plate 21 is also fixedly connected to the top right side of steel block 29. A groove 22 is provided at the front end of square plate 21. The inner wall of groove 22 meshes with the outer wall of short plate 20. The wall is slidably connected. An L-shaped plate 5 is fixedly connected to the top of the second short plate 20. The bottom of the L-shaped plate 5 is slidably connected to the outer wall of the square plate 21. A groove 22 is provided at the front end of the square plate 21, and the inner wall of the groove 22 is slidably connected to the outer wall of the second short plate 20. This design allows the square plate 21 to slide between the two short plates 20. An L-shaped plate 5 is fixedly connected to the top of the second short plate 20, and the bottom of the L-shaped plate 5 is slidably connected to the outer wall of the square plate 21. This connection method ensures both structural stability and necessary flexibility. (Connecting block 3...) The top left end has a hole 18 that engages with the steel block 1. A protective structure 2 is provided on the left side of the steel block 1. The protective structure 2 is used to protect the interface of the steel structure. The top left end of the connecting block 3 also has a hole 18 that engages with the L-shaped plate 5. In order to ensure the safety and durability of the entire steel structure during use, a protective structure 2 is specially provided on the left side of the steel block 1. The main function of this protective structure 2 is to protect the interface of the steel structure and prevent damage to the structure during disassembly and assembly. It also provides safety for the operators.

[0042] Specifically, the top of steel block 1 has holes 3 19, the inner walls of which can be slidably connected to connecting blocks 3. The bottom right end of connecting block 3 is fixedly connected to a long column 10. The front and rear outer walls of the long column 10 can slide inside steel block 2 9. The top right side of steel block 2 9 is rotatably connected to a gear 8. The outer wall of gear 8 meshes with the inner wall of short plate 20, ensuring a tight fit between them. The top right side of steel block 2 9 is also fixedly connected to a square plate 21. The front end of square plate 21 has a groove 22. The inner wall of groove 22 can slide smoothly with the outer wall of short plate 20, further enhancing the flexibility and stability of the structure. The protective structure 2 can effectively protect the steel structure interface from external damage.

[0043] Please see the appendix Figure 1 Appendix Figure 5 and attached Figure 6 The protective structure 2 includes an L-shaped steel frame 201. The top of the L-shaped steel frame 201 is fixedly connected to the bottom left side of the steel block 1. A steel bar 202 is fixedly connected to the bottom left side of the L-shaped steel frame 201. A support plate 207 is fixedly connected to the rear side of the steel bar 202. The design of this support plate 207 makes the entire structure more stable. A rotating bar 206 is rotatably connected to the top of the support plate 207. A long... Strip 204 has a rotatable connection at its front end to Strip 205, and a protective plate 209 is rotatably connected to its bottom end. The top of support plate 207 is rotatably connected to a rotating strip 206, and the right side of rotating strip 206 is rotatably connected to Strip 204. The front end of Strip 204 is rotatably connected to Strip 205. This design allows Strip 204 and Strip 205 to rotate relative to each other. The bottom end of Strip 205 is rotatably connected to a protective plate 209, which provides protection. A short plate 211 is rotatably connected to the middle of section 9. A protective plate 210 is rotatably connected to the bottom of short plate 211. A long strip 208 is rotatably connected to the rear end of protective plate 210. The top of long strip 208 is rotatably connected to the rear end of long strip 204. The middle of protective plate 209 is rotatably connected to a short plate 211. The design of short plate 211 makes the entire structure more compact. The bottom end of short plate 211 is rotatably connected to another protective plate 210. The design of protective plate 210 engages with protective plate 209 to provide protection. The rear end of protective plate 210 is rotatably connected to long strip 208. The top of the third strip 208 is connected to the rear end of the first strip 204 by a rotating connection, forming a closed structure. The front ends of the first protective plate 209 and the second protective plate 210 are both provided with holes 212. The inner side of the hole 212 is fitted with a locking block 203. The design of these holes 212 allows the entire structure to be fixed with the locking block 203. The design of the locking block 203 makes the entire structure more stable when subjected to external forces, preventing relative movement between components. This design not only improves the overall strength of the protective structure 2, but also increases its protectiveness and stability.

[0044] Specifically, the protective structure 2 includes an L-shaped steel frame 201. The top part of the L-shaped steel frame 201 is fixedly connected to the bottom left side of the steel block 1. This connection method not only ensures the stability of the structure but also effectively disperses and bears forces from all directions. A steel bar 202 is fixedly connected to the bottom left side of the L-shaped steel frame 201, and a support plate 207 is fixedly connected to the rear side of the steel bar 202. This support plate 207 plays an important supporting role in the structure, and the top part of the support plate 207 is designed with a rotatable connection. The structure is rotatably connected to a rotating bar 206. The right side of the rotating bar 206 is rotatably connected to a long bar 204. This rotatable connection design allows the long bar 204 to rotate, thereby increasing the flexibility and adaptability of the entire protective structure 2. The front end of the long bar 204 is rotatably connected to a long bar 205, and the bottom end of the long bar 205 is rotatably connected to a protective plate 209. The protective plate 209 plays an important protective role in the structure and can effectively prevent the interface from being subjected to external impacts and damage.

[0045] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 4 A protective block 4 is fixedly connected to the bottom left side of the steel block 1. A U-shaped frame 15 is fixedly connected to the bottom of the protective block 4. A rotating shaft 16 is rotatably connected to the bottom of the U-shaped frame 15. A protective block 4 is fixedly connected to the bottom left side of the steel block 1. The bottom part of this protective block 4 is fixedly connected to a U-shaped frame 15. The bottom of the U-shaped frame 15 is also designed with a rotating connection structure, which is connected to it through the rotating shaft 16. A hook 17 is fixedly connected to the top of the rotating shaft 16. A handle 6 is fixedly connected to the top of the gear 8. A protective sleeve 7 is fixedly connected to the outer wall of the handle 6. A practical hook 17 is fixedly connected to the top of the rotating shaft 16 for hanging or fixing other items. A handle 6 is also fixedly connected to the top of the gear 8. This handle 6 is not only convenient to operate, but its outer wall is also fixedly connected to a protective sleeve 7 to ensure safety and protection during use.

[0046] Specifically, a protective block 4 is fixedly connected to the bottom left side of the steel block 1 to strengthen the structure and provide support for movement. The bottom part of the protective block 4 is also tightly connected to a U-shaped frame 15. The bottom of the U-shaped frame 15 is also designed with a rotating structural shaft 16. The top part of the shaft 16 is fixedly connected to a hook 17 for placing items.

[0047] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 6A handle 3 13 is fixedly connected to the front end of the rotating bar 206. An anti-slip sleeve 14 is fixedly connected to the outer wall of the handle 3 13. The handle 3 13 is fixedly connected to the front end of the rotating bar 206 for easy operation. Simultaneously, the outer wall of the handle 3 13 is fixedly connected to the anti-slip sleeve 14 to ensure sufficient friction under various operating conditions, improving safety. An interface sleeve 23 is fixedly connected to the right outer wall of the steel bar 202. The inner wall of the interface sleeve 23 engages with the bottom left side of the L-shaped steel frame 201. (Connecting block) The bottom end of the connecting block 3 is fixedly connected to a handle 11, the front end of the locking block 203 is fixedly connected to a short post 12, and the right outer wall of the steel bar 202 is fixedly connected to an interface sleeve 23, which serves to protect the steel bar 202 and can also perfectly engage with the left bottom end of the L-shaped steel frame 201 to ensure the stability of the entire structure. The bottom end of the connecting block 3 is fixedly connected to a handle 11, which allows for various adjustments during operation. The front end of the locking block 203 is fixedly connected to a short post 12, which facilitates the use of the locking block 203.

[0048] Specifically, a handle 313 is fixedly connected to the front end of the rotating bar 206, providing the necessary gripping surface, and an anti-slip sleeve 14 is fixedly connected to its outer wall to ensure the stability and safety of operation. An interface sleeve 23 is fixedly connected to the right outer wall of the steel bar 202. The inner wall of this interface sleeve 23 is designed to engage with the bottom left side of the L-shaped steel frame 201, making the entire structure more stable, able to withstand greater force and pressure, and also protecting the interface from damage.

[0049] Working principle: Place connecting block 3 at the bottom of hole 19 of steel block 1, and then move steel block 2 9 from right to left along the bottom of steel block 1. At this time, connecting block 3 will be pushed upward by steel block 2 9 and engage with steel block 1. Then rotate gear 8 to drive short plate 2 20 to move to the left in groove 22. The movement of short plate 2 20 will also move L-shaped plate 5 until it engages with hole 18 at the top of connecting block 3, achieving the purpose of quick assembly and fixation. This new type of steel structure can ensure structural stability and achieve efficient and quick assembly and disassembly, greatly reducing the construction cycle of the entire project, significantly reducing the input of manpower and material resources, and saving enterprises a lot of money. With its unique quick connection design, it makes later maintenance simple and can quickly respond to and deal with emergencies.

[0050] By rotating the rotating bar 206, the third bar 208 at the rear end of the first bar 204 will move the front end of the second protective plate 210 upwards. At the same time, the front end of the first bar 204 will rotate the second bar 205, and the bottom end of the second bar 205 will move the front end of the first protective plate 209 downwards. At this time, the first protective plate 209 and the second protective plate 210 will move towards each other. Then, the locking block 203 will engage with the hole 212, which will fix and protect the interface between the L-shaped steel frame 201 and the steel bar 202. The interface is well protected, and its service life can be extended by several years or even decades. It can ensure the long-term effectiveness of the connecting parts. For the bolted connection interface, it can ensure that the bolt tightening force will not be affected by rust, while reducing maintenance costs.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-assembly and disassembly steel structure, comprising a steel block (1), characterized in that: The top of the first steel block (1) has a hole three (19), and a connecting block (3) is slidably connected to the inner wall of the hole three (19). A long column (10) is fixedly connected to the bottom right end of the connecting block (3). The outer walls of the front and rear ends of the long column (10) are slidably connected to the second steel block (9). A gear (8) is rotatably connected to the right side of the top end of the second steel block (9). A short plate two (20) is meshed with the outer wall of the gear (8). A square plate (21) is fixedly connected to the right side of the top end of the second steel block (9). The front end of the square plate (21) is provided with a groove (22), the inner wall of the groove (22) is slidably connected to the outer wall of the short plate two (20), the top end of the short plate two (20) is fixedly connected with an L-shaped plate (5), the bottom of the L-shaped plate (5) is slidably connected to the outer wall of the square plate (21), the top of the left end of the connecting block (3) is engaged with a hole two (18), and a protective structure (2) is provided on the left side of the steel block one (1). The protective structure (2) is used to protect the interface of the steel structure.

2. The quick-assembly and disassembly steel structure according to claim 1, characterized in that: The protective structure (2) includes an L-shaped steel frame (201). The top of the L-shaped steel frame (201) is fixedly connected to the bottom left side of the steel block (1). A steel bar (202) is fixedly connected to the bottom left side of the L-shaped steel frame (201). A support plate (207) is fixedly connected to the rear side of the steel bar (202). A rotating bar (206) is rotatably connected to the top of the support plate (207). A long bar (204) is rotatably connected to the right side of the rotating bar (206). A long bar (205) is rotatably connected to the front end of the long bar (204). A long bar (206) is rotatably connected to the front end of the long bar (204). 5) is rotatably connected to a protective plate 1 (209) at its bottom end. A short plate 1 (211) is rotatably connected to the middle part of the protective plate 1 (209). A protective plate 2 (210) is rotatably connected to the bottom end of the short plate 1 (211). A long strip 3 (208) is rotatably connected to the rear end of the protective plate 2 (210). The top end of the long strip 3 (208) is rotatably connected to the rear end of the long strip 1 (204). A hole 1 (212) is opened at the front end of both the protective plate 1 (209) and the protective plate 2 (210). A locking block (203) is engaged inside the hole 1 (212).

3. The quick-assembly and disassembly steel structure according to claim 1, characterized in that: The top of the gear (8) is fixedly connected to a handle (6), and the outer wall of the handle (6) is fixedly connected to a protective sleeve (7).

4. A quick-assembly and disassembly steel structure according to claim 1, characterized in that: A protective block (4) is fixedly connected to the bottom left side of the steel block (1), and a U-shaped frame (15) is fixedly connected to the bottom of the protective block (4).

5. A quick-assembly and disassembly steel structure according to claim 4, characterized in that: The bottom end of the U-shaped frame (15) is rotatably connected to a rotating shaft (16), and the top end of the rotating shaft (16) is fixedly connected to a hook (17).

6. A quick-assembly and disassembly steel structure according to claim 2, characterized in that: The front end of the rotating bar (206) is fixedly connected to a handle three (13), and the outer wall of the handle three (13) is fixedly connected to an anti-slip sleeve (14).

7. A quick-assembly and disassembly steel structure according to claim 2, characterized in that: The bottom end of the connecting block (3) is fixedly connected to a handle (11), and the front end of the locking block (203) is fixedly connected to a short column (12).

8. A quick-assembly and disassembly steel structure according to claim 2, characterized in that: An interface sleeve (23) is fixedly connected to the outer right side of the steel bar (202), and the inner wall of the interface sleeve (23) engages with the bottom left side of the L-shaped steel frame (201).

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