A modular concrete-filled steel tube column connector

Abstract

The present invention relates to the technical field of concrete column installation, and particularly relates to a modular steel-concrete column connector, which includes a fixed connection seat and a concrete column body. A buffer connection seat is movably installed above the fixed connection seat, and the bottom surface of the concrete column body is inserted and installed above the buffer connection seat; a first limiting component, which is used for positioning the concrete column body and the buffer connection seat and protecting the connection part; a second limiting component, which is used for connecting and limiting multiple surfaces of the concrete column body; a third limiting component, which is used for limiting and locking the concrete column body in the vertical direction. Compared with the prior art, by setting the first limiting component in cooperation with the third limiting component, the concrete column can maintain stability in the vertical direction under dynamic loads such as earthquakes. The cooperation of the two significantly improves the seismic performance of the overall structure and reduces the displacement and damage caused by earthquakes.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete column installation, and particularly to a modular steel tube concrete column connector. Background Art

[0002] In recent years, modular steel tube concrete columns have become increasingly popular due to advantages such as fast construction speed. They are usually prefabricated in factories and then transported to the site for assembly through a connection structure.

[0003] In the prior art, in a modular steel tube concrete column connection structure disclosed in Chinese patent document CN115977317B, it is proposed to set an extrusion member in the insertion tube. Under the action of the driving frame, the extrusion member abuts against and extrudes the inner wall of the slot. At the same time, a reinforcing member is arranged outside the insertion tube. On this basis, grout is injected into the reinforcing frame through a grouting hole, and the concrete fills the lower reinforcing frame, the space between the reinforcing frame and the inner wall of the insertion tube, and the space between the outer wall of the insertion tube and the inner wall of the slot. Compared with the existing connection method that only uses connection bolts for fixing, the connection strength is improved. However, similar to the traditional method, traditional steel tube concrete column connectors often rely on welding or bolt fixing during the connection process. Whether it is welding or bolt fixing, traditional connection methods usually require a lot of manual adjustment and on-site operations. For example, during welding, the welding joints need to be inspected and corrected, and for bolt fixing, it is necessary to ensure that each bolt is correctly installed and has the correct torque. These manual operations not only increase the construction period but also increase the possibility of human errors, which may affect the connection quality and the overall performance of the structure. Therefore, the tediousness and complexity of traditional welding and bolt fixing methods during the installation process not only increase the construction cost and time but also may affect the accuracy and stability of the connector. Therefore, the present application discloses a modular steel tube concrete column connector to meet the simplicity and accuracy requirements during the connection of steel tube concrete columns. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a modular steel tube concrete column connector to solve the problems that traditional connection methods usually require a lot of manual adjustment and on-site operations, and have tediousness and complexity.

[0005] Based on the above purpose, the present invention provides a modular steel tube concrete column connector, including: a fixed connection seat and a concrete column body. A buffer connection seat is movably installed above the fixed connection seat, and the bottom surface of the concrete column body is inserted and installed above the buffer connection seat.

[0006] The first limiting component, the first limiting component includes a positioning sleeve fixedly installed in the middle of the upper end of the buffer connecting seat, and a positioning groove opened at the bottom of the concrete column body. The positioning sleeve is adapted to the positioning groove. The positioning sleeve is hollowly arranged. The first limiting component is used for positioning the concrete column body and the buffer connecting seat and protecting the connection part;

[0007] The second limiting component, the second limiting component includes a first rectangular positioning column fixedly installed inside the positioning sleeve, and a second rectangular positioning column fixedly installed inside the positioning groove. The second rectangular positioning column is sleeved on the first rectangular positioning column. Connection modules are arranged on the outer four sides of the first rectangular positioning column and the inner four sides of the second rectangular positioning column in a mutually adapted manner. The second limiting component is used for connecting and limiting multiple sides of the concrete column body;

[0008] The third limiting component, the third limiting component includes a positioning rod movably installed in the middle of the fixed connecting seat and the buffer connecting seat, and two clamping blocks rotatably installed inside the second rectangular positioning column. A limiting block is fixedly installed at the top end of the positioning rod. The clamping block is adapted to the limiting block. The third limiting component is used for limiting and locking the concrete column body in the vertical direction.

[0009] Preferably, a sliding sleeve is slidably installed on the outer surface of the bottom of the concrete column body. A second return spring is sleeved between the inner side of the sliding sleeve and the outer surface of the concrete column body. A positioning groove is opened inside the bottom of the concrete column body. A plurality of through holes are opened on the circumferential bottom of the positioning groove, and limiting beads are movably installed inside the plurality of through holes. A protrusion is arranged on one side of the sliding sleeve and is adapted to the limiting bead. A limiting groove is opened on one side of the positioning sleeve and is adapted to the limiting bead.

[0010] Preferably, the outer surface of the sliding sleeve is arranged in a concave shape, and the maximum diameter of the sliding sleeve is greater than the maximum diameter of the concrete column body.

[0011] Preferably, the connection module includes a first fixing plate fixedly installed on the outer four sides of the first rectangular positioning column, and a second fixing plate fixedly installed on the inner four sides of the second rectangular positioning column. A first pushing block and a second pushing block are respectively fixedly installed on one side of the top surface of the first fixing plate and one side of the bottom surface of the second fixing plate. A first rotating block and a second rotating block are respectively rotatably installed in the middle of one side of the first fixing plate and the middle of one side of the second fixing plate.

[0012] Preferably, both the first rotating block and the second rotating block are semicircularly arranged, and the first rotating block is adapted to the second rotating block.

[0013] Preferably, one side of the first rotating block and one side of the second rotating block are respectively fixedly connected with a first connecting rotating plate and a second connecting rotating plate. The middle parts of the first connecting rotating plate and the second connecting rotating plate are respectively fixedly connected with a first reset spring and a third reset spring. The other ends of the first reset spring and the third reset spring are respectively fixedly connected with one side of the first fixing plate and the second fixing plate. Through grooves adapted to the first connecting rotating plate or the second connecting rotating plate are further formed on one side of the first fixing plate and one side of the second fixing plate.

[0014] Preferably, a rotating column is rotatably installed inside the second rectangular positioning column. The two clamping blocks are respectively rotatably installed on the outer surface of the rotating column. A plurality of limiting blocks are provided, and the plurality of limiting blocks are arranged in a stacked manner. The top surfaces of the limiting blocks are all arc-shaped. The two clamping blocks are both in a U shape that wraps the limiting blocks, and the two clamping blocks are arranged oppositely.

[0015] Preferably, a torsion spring is sleeved on the outer surface of the rotating column. Connecting ribs are fixedly connected to both sides of the torsion spring, and the other ends of the two connecting ribs are respectively fixedly connected to one side of the two clamping blocks.

[0016] Preferably, rotating frames are rotatably installed on both sides of the bottom of the fixed connection seat. The bottoms of the two rotating frames are rotatably connected to the bottom of the positioning rod. A tension spring is sleeved on the outer surface of the positioning rod below the fixed connection seat. Triangular clamping blocks are arranged on the inner sides of the two rotating frames. Fixed rods are fixedly installed on both sides of the bottom surface of the buffer connection seat. A connecting plate is fixedly installed at the bottom end of the fixed rod. A moving rod is fixedly connected to the bottom end of the other side of the connecting plate. The moving rod passes through the fixed connection seat and is adapted to the triangular clamping block.

[0017] Preferably, supporting blocks are arranged on the opposite surfaces of the fixed connection seat and the buffer connection seat for abutting, and the opposite surfaces of the two supporting blocks are adapted to each other.

[0018] Advantages of the present invention:

[0019] 1. This modular concrete-filled steel tube column connector, by setting the first limiting component in cooperation with the third limiting component, realizes preliminary precise positioning through the cooperation of the positioning sleeve and the positioning groove. The matching design of the positioning sleeve and the positioning groove ensures that the concrete column body can accurately align with the buffer connection seat during installation, thereby reducing the installation error and enabling the concrete column body to be accurately positioned at the correct position during the preliminary installation. This preliminary positioning reduces the workload of subsequent adjustments and improves the installation efficiency. After the preliminary positioning is completed, the third limiting component further fixes the concrete column body through vertical locking to ensure its stability in the vertical direction. The third limiting component realizes the locking of the concrete column body in the vertical direction through the interaction of the positioning rod, the limiting block, and the clamping block. The combination of this preliminary positioning and vertical locking ensures the stability of the concrete column in any direction and enhances the firmness of the overall connection. Both can be connected by pressing down under their own weights. The concrete column body can quickly align with the positioning sleeve, reducing the complex operations during the installation process. Moreover, the vertical locking setting of the third limiting component enables the concrete column to maintain its stability in the vertical direction under dynamic loads such as earthquakes. The cooperation of the two significantly improves the seismic performance of the overall structure and reduces the displacement and damage caused by earthquakes.

[0020] 2. This modular concrete-filled steel tube column connector, by setting connection modules inside the second limiting component, constructs an efficient multi-surface locking system through the first fixing plates and the second fixing plates installed on the four surfaces of the first rectangular positioning column and the second rectangular positioning column. During the docking process of the concrete column body and the positioning sleeve, multiple components of the connection module work together. Through the interaction of the pushing block and the rotating block, the stable positioning and locking of the first rectangular positioning column and the second rectangular positioning column are realized. Specifically, the second fixing plate pushes the first fixing plate on its inner side, prompting the first pushing block and the second pushing block to contact and push the first rotating block and the second rotating block to rotate, thereby driving the rotation of the connecting rotating plate and pulling the return spring. This process not only enables the pushing block to enter the corresponding fixing plate to complete the multi-surface connection and locking, but also, through the action of the return spring, ensures the stable reset of the first rotating block and the second rotating block in the locked state, thus forming a tight multi-surface locking structure, greatly improving the connection strength and shear resistance of the concrete column body, effectively dispersing the load, improving the shear performance, and ensuring the overall stability and safety of the structure. In addition, the module design simplifies the installation process, reduces the construction time and error, and further enhances the economy and reliability of the project. Brief Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the embodiments or the description of the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 Schematic diagram of the exploded structure of the present invention;

[0024] Figure 3 Schematic diagram of the planar structure of the present invention;

[0025] Figure 4 Schematic diagram of the partial sectional structure of the present invention;

[0026] Figure 5 For the present invention Figure 4 Enlarged structure diagram at position A in;

[0027] Figure 6 Schematic diagram of the internal structure of the positioning sleeve of the present invention;

[0028] Figure 7 Schematic diagram of the connecting seat structure of the present invention;

[0029] Figure 8 For the present invention Figure 6 Enlarged structure diagram at position B in;

[0030] Figure 9 Schematic diagram of the bottom structure of the concrete column body of the present invention;

[0031] Figure 10 For the present invention Figure 9 Enlarged structure diagram at position C in;

[0032] Figure 11 Schematic diagram of the connection module structure of the present invention;

[0033] Figure 12 Schematic diagram of the connection structure of the third limiting component of the present invention;

[0034] Figure 13 Schematic diagram of the connection structure of the first limiting component of the present invention.

[0035] The labels in the figure are:

[0036] 1. Fixed connection base; 2. Buffer connection base; 3. Positioning rod; 4. Limiting block; 5. Support block; 6. Rotating frame; 7. Tensile spring; 8. Fixed rod; 9. Moving rod; 10. Positioning sleeve; 11. Limiting groove; 12. First rectangular positioning post; 13. First fixing plate; 14. First pushing block; 15. First connecting rotating plate; 16. First rotating block; 17. First reset spring; 18. Concrete column body; 19. Sliding sleeve; 20. Second reset spring; 21. Positioning groove; 22. Limiting bead; 23. Second rectangular positioning post; 24. Second fixing plate; 25. Second pushing block; 26. Second connecting rotating plate; 27. Second rotating block; 28. Third reset spring; 29. Rotating column; 30. Clamping block; 31. Torsion spring; 32. Connecting rib. Detailed implementation manner

[0037] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the following further elaborates on the present invention in conjunction with specific embodiments.

[0038] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar terms mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar terms are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative position relationships, and when the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0039] Such as Figures 1 to 13As shown, the modular steel tube concrete column connector includes: a fixed connection seat 1 and a concrete column body 18, a buffer connection seat 2 is movably installed above the fixed connection seat 1, and the bottom surface of the concrete column body 18 is plugged and installed above the buffer connection seat 2; a first limiting component, the first limiting component includes a positioning sleeve 10 fixedly installed in the middle of the upper end of the buffer connection seat 2, and a positioning groove 21 opened at the bottom of the concrete column body 18, the positioning sleeve 10 is adapted to the positioning groove 21, and the positioning sleeve 10 is hollow. The first limiting component is used for positioning the concrete column body 18 and the buffer connection seat 2 and protecting the connection; a second limiting component, the second limiting component includes a first rectangular positioning column 12 fixedly installed inside the positioning sleeve 10, and a second rectangular positioning column 23 fixedly installed inside the positioning groove 21, the second rectangular positioning column 23 is sleeved with the first rectangular positioning column 12, the four outer sides of the first rectangular positioning column 12 and the four inner sides of the second rectangular positioning column 23 are provided with mutually adapted connection modules, and the second limiting assembly is used to connect and limit the multiple sides of the concrete column body 18; a third limiting assembly, the third limiting assembly includes a positioning rod 3 movably installed in the middle of the fixed connection seat 1 and the buffer connection seat 2, and two clamping blocks 30 rotatably installed inside the second rectangular positioning column 23, a limiting block 4 is fixedly installed on the top end of the positioning rod 3, the clamping block 30 is adapted to the limiting block 4, and the third limiting assembly is used to limit and lock the vertical direction of the concrete column body 18;

[0040] When connecting the concrete column body 18, first install or cast the fixed connection seat 1 and the buffer connection seat 2 into the corresponding base or one end of the concrete column body 18 to be connected, and then dock the bottom end of the concrete column body 18 and place it on the buffer connection seat 2, use the dead weight of the concrete column to move downward, and perform preliminary positioning through the cooperation of the positioning sleeve 10 and the positioning groove 21, then insert the first rectangular positioning column 12 into the second rectangular positioning column 23, and perform multi-faceted limiting through the connection module, and finally insert the positioning rod 3 into the clamping block 30, and use the limiting block 4 to lock the vertical direction to ensure that the concrete column body 18 A firm connection with the connecting piece, wherein the positioning sleeve 10 and the positioning groove 21 in the first limiting component ensure that the concrete column body 18 and the buffer connecting seat 2 can be accurately aligned when connected to reduce installation errors; the first and second rectangular positioning columns 23 in the second limiting component cooperate with each other, and through the connection modules arranged on the four sides, the multi-sided stable limitation of the concrete column body 18 is achieved, and the stability and shear resistance of the connection are increased; the positioning rod 3 and the clamping block 30 in the third limiting component, through the cooperation of the limiting block 4, realize the locking of the concrete column body 18 in the vertical direction, prevent vertical displacement, and improve the overall stability of the structure.

[0041] like Figure 2 , Figure 3 ,Figure 4 , Figure 13 As shown in Figure 13 , a sliding sleeve 19 is slidably installed on the outer surface of the bottom of the concrete column body 18. A second return spring 20 is sleeved between the inner side of the sliding sleeve 19 and the outer surface of the concrete column body 18. A positioning groove 21 is provided inside the bottom of the concrete column body 18. A plurality of through holes are provided in the circumferential direction of the bottom of the positioning groove 21, and a plurality of limit beads 22 are movably installed inside the through holes. A protrusion is provided on one side of the sliding sleeve 19 and is adapted to the limit bead 22. A limit groove 11 is provided on one side of the positioning sleeve 10 and is adapted to the limit bead 22. The outer surface of the sliding sleeve 19 is arranged in a concave shape, and the maximum diameter of the sliding sleeve 19 is greater than the maximum diameter of the concrete column body 18;

[0042] When docking the concrete column body 18 with the buffer connection seat 2, first place a plurality of jacks that have been raised at the upper end of the buffer connection seat 2, corresponding to the bottom of the sliding sleeve 19, and then place the concrete column body 18 downward. At this time, the sliding sleeve 19 first contacts the positioning ring or the jack, thereby driving the sliding sleeve 19 to slide upward and compress the second return spring 20. At this time, the limit bead 22 has released the force exerted by the sliding sleeve 19 on the outer surface. Then the limit bead 22 will not hinder the downward-installed concrete column body 18, so that the positioning sleeve 10 can easily enter the inside of the positioning groove 21. When the positioning sleeve 10 is completely wrapped by the positioning groove 21, the position of the limit groove 11 is exactly located at the position where the limit bead 22 is located. At this time, the jack is unloaded, so that the sliding sleeve 19 moves downward, gradually pushing the limit bead 22 into the inside of the limit groove 11 for limiting. At the same time, the sliding sleeve 19 also protects this connection part, wraps it all around, prevents the external environment from eroding and damaging the connection part, and improves the durability of the connection part.

[0043] such as Figure 5 , Figure 6 , Figure 8 , Figure 9 , Figure 10 , Figure 11As shown in the figure, the connection module includes a first fixing plate 13 fixedly installed on the four outer sides of the first rectangular positioning post 12, and a second fixing plate 24 fixedly installed on the four inner sides of the second rectangular positioning post 23. On one side of the top surface of the first fixing plate 13 and one side of the bottom surface of the second fixing plate 24, a first pushing block 14 and a second pushing block 25 are respectively fixedly installed. In the middle of one side of the first fixing plate 13 and in the middle of one side of the second fixing plate 24, a first rotating block 16 and a second rotating block 27 are respectively rotatably installed. Both the first rotating block 16 and the second rotating block 27 are semicircularly arranged and are adapted to each other. On one side of the first rotating block 16 and one side of the second rotating block 27, a first connecting rotating plate 15 and a second connecting rotating plate 26 are respectively fixedly connected. In the middle of the first connecting rotating plate 15 and the second connecting rotating plate 26, a first return spring 17 and a third return spring 28 are respectively fixedly connected. The other ends of the first return spring 17 and the third return spring 28 are respectively fixedly connected to one side of the first fixing plate 13 and the second fixing plate 24. On one side of the first fixing plate 13 and one side of the second fixing plate 24, through grooves adapted to the first connecting rotating plate 15 or the second connecting rotating plate 26 are also provided.

[0044] When the concrete column body 18 is docked with the positioning sleeve 10, the second rectangular positioning post 23 inside the positioning groove 21 follows and docks downward, and gradually sleeves on the outside of the first rectangular positioning post 12 inside the positioning sleeve 10. And during the sleeving process, the connection module simultaneously connects, positions and locks the four surfaces of the first rectangular positioning post 12 and the second rectangular positioning post 23, further increasing the multi-surface connection force of the concrete column body 18. During the connection process of the first rectangular positioning post 12 and the second rectangular positioning post 23, first, a plurality of second fixing plates 24 inside the second rectangular positioning post 23 move towards the first fixing plate 13 on the outer surface of the first rectangular positioning post 12, so that the first pushing block 14 and the second pushing block 25 respectively come into contact with the first rotating block 16 and the second rotating block 27, and respectively push the first rotating block 16 and the second rotating block 27 to rotate. During the rotation process of the first rotating block 16 and the second rotating block 27, the first connecting rotating plate 15 and the second connecting rotating plate 26 are driven to rotate, driving and pulling the first return spring 17 and the third return spring 28 until it rotates to a position where it does not prevent the first pushing block 14 from entering the second fixing plate 24 and the second pushing block 25 from entering the first fixing plate 13. At this time, the first rotating block 16 and the second rotating block 27 are close to each other. Under the action of the first return spring 17 and the third return spring 28, the first connecting rotating plate 15 and the second connecting rotating plate 26 are pushed to reset, and then drive the first rotating block 16 and the second rotating block 27 to rotate synchronously to lock the first pushing block 14 and the second pushing block 25.

[0045] As Figure 2 、 Figure 3 、 Figure 7, Figure 12 As shown, a rotating column 29 is rotatably installed inside the second rectangular positioning column 23. Two clamping blocks 30 are respectively rotatably installed on the outer surface of the rotating column 29. A plurality of limiting blocks 4 are provided, and the plurality of limiting blocks 4 are arranged in a stacked manner. The top surfaces of the limiting blocks 4 are all arc-shaped. Both clamping blocks 30 are in a U shape that wraps the limiting blocks 4, and the two clamping blocks 30 are arranged oppositely. A torsion spring 31 is sleeved on the outer surface of the rotating column 29. Both sides of the torsion spring 31 are fixedly connected with connecting ribs 32, and the other ends of the two connecting ribs 32 are respectively fixedly connected with one side of the two clamping blocks 30. Rotating frames 6 are rotatably installed on both sides of the bottom of the fixed connection seat 1. The bottoms of the two rotating frames 6 are rotatably connected with the bottom of the positioning rod 3. A tension spring 7 is sleeved on the outer surface of the positioning rod 3 below the fixed connection seat 1. Triangular clamping blocks are arranged on the inner sides of the two rotating frames 6. Fixed rods 8 are fixedly installed on both sides of the bottom surface of the buffer connection seat 2. The bottom ends of the fixed rods 8 are fixedly installed with connecting plates. The other side bottom end of the connecting plate is fixedly connected with a moving rod 9. The moving rod 9 penetrates through the fixed connection seat 1 and is adapted to the triangular clamping block. Support blocks 5 are arranged on the opposite surfaces of the fixed connection seat 1 and the buffer connection seat 2 for abutting, and the opposite surfaces of the two support blocks 5 are adapted to each other;

[0046] During the downward docking process of the concrete column body 18, during the docking process of the first limiting component, it will synchronously drive the two clamping blocks 30 inside the third positioning component to move downward. At this time, it will first come into contact with the top surface of the limiting block 4, first press the positioning rod 3 to move downward for a certain distance and pull the tension spring 7, which will cause the two rotating frames 6 to rotate a small distance to both sides. After reaching the rotation limit, the two clamping blocks 30 continue to move downward and are pushed open by the arc-shaped limiting block 4 above to rotate a small position, so that it can accommodate the limiting block 4. At this time, when there is no pressure on the limiting block 4, the tension spring 7 resets, driving the positioning rod 3 to push upward for a certain distance, so that a plurality of limiting blocks 4 quickly enter the inside of the two clamping blocks 30, and the situation that only one limiting block 4 is clamped by the clamping block 30 will not occur, thereby realizing multiple vertical protections. After the limiting block 4 enters the inside of the two clamping blocks 30, the jacking force of the limiting block 4 on the two clamping blocks 30 is released. Under the action of the torsion spring 31, the two clamping blocks 30 are pulled back to their original positions to limit and clamp the bottom of the limiting block 4. At this time, the first limiting component is also synchronously limited, cooperating with the first limiting component to achieve a further connection. There is no need to use bolts to dock at the connection position, and only the self-weight of the concrete column is used to complete the docking downward. And cooperating with the second limiting component, a better connection effect can be achieved.

[0047] ​Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0048] The present invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A modular steel tube concrete column connector, characterized in that: include: A fixed connection seat (1) and a concrete column body (18), wherein a buffer connection seat (2) is movably mounted above the fixed connection seat (1), and the bottom surface of the concrete column body (18) is plug-mounted above the buffer connection seat (2); A first limiting assembly, comprising a positioning sleeve (10) fixedly mounted in the middle of the upper end of the buffer connection seat (2), and a positioning groove (21) provided at the bottom of the concrete column body (18), the positioning sleeve (10) being adapted to the positioning groove (21), the positioning sleeve (10) being hollow, and the first limiting assembly being used for positioning the concrete column body (18) and the buffer connection seat (2) and protecting the connection; A second limiting assembly, the second limiting assembly comprising a first rectangular positioning column (12) fixedly mounted inside the positioning sleeve (10), and a second rectangular positioning column (23) fixedly mounted inside the positioning groove (21), the second rectangular positioning column (23) being sleeved on the first rectangular positioning column (12), the four outer sides of the first rectangular positioning column (12) and the four inner sides of the second rectangular positioning column (23) being provided with mutually matching connection modules, the second limiting assembly being used for connecting and limiting multiple sides of the concrete column body (18); A third limiting assembly, the third limiting assembly comprising a positioning rod (3) movably mounted in the middle of the fixed connection seat (1) and the buffer connection seat (2), and two clamping blocks (30) rotatably mounted inside the second rectangular positioning column (23), a limiting block (4) being fixedly mounted on the top end of the positioning rod (3), the clamping block (30) being adapted to the limiting block (4), and the third limiting assembly being used to limit and lock the concrete column body (18) in a vertical direction; The connection module comprises a first fixed plate (13) fixedly mounted on the four outer sides of the first rectangular positioning column (12), and a second fixed plate (24) fixedly mounted on the four inner sides of the second rectangular positioning column (23); a first push block (14) and a second push block (25) are fixedly mounted on one side of the top surface of the first fixed plate (13) and one side of the bottom surface of the second fixed plate (24), respectively; a first rotating block (16) and a second rotating block (27) are rotatably mounted on the middle part of one side of the first fixed plate (13) and the middle part of one side of the second fixed plate (24), respectively; the first rotating block (16) and the second rotating block (27) are both semicircularly arranged, and the first rotating block (16) and the second rotating block (27) are rotatably mounted on the middle part of one side of the first fixed plate (13) and the middle part of one side of the second fixed plate (24). To match, one side of the first rotating block (16) and one side of the second rotating block (27) are respectively fixedly connected with a first connecting rotating plate (15) and a second connecting rotating plate (26); the middle parts of the first connecting rotating plate (15) and the second connecting rotating plate (26) are respectively fixedly connected with a first return spring (17) and a third return spring (28); the other ends of the first return spring (17) and the third return spring (28) are respectively fixedly connected with one side of the first fixed plate (13) and the second fixed plate (24); one side of the first fixed plate (13) and one side of the second fixed plate (24) are also provided with a through groove matched with the first connecting rotating plate (15) or the second connecting rotating plate (26).

2. The modular steel tube concrete column connector according to claim 1, characterized in that: A sliding sleeve (19) is slidably mounted on the outer surface of the bottom of the concrete column body (18); a second return spring (20) is sleeved between the inner side of the sliding sleeve (19) and the outer surface of the concrete column body (18); a positioning groove (21) is provided on the inner side of the bottom of the concrete column body (18); a plurality of through holes are provided on the bottom circumference of the positioning groove (21); and limiting beads (22) are movably mounted inside the plurality of through holes; a protrusion is provided on one side of the sliding sleeve (19) to match the limiting beads (22); and a limiting groove (11) is provided on one side of the positioning sleeve (10) to match the limiting beads (22).

3. The modular steel tube concrete column connector according to claim 2, characterized in that: The outer surface of the sliding sleeve (19) is arranged in a concave shape, and the maximum diameter of the sliding sleeve (19) is greater than the maximum diameter of the concrete column body (18).

4. The modular steel tube concrete column connector according to claim 1, characterized in that: A rotating column (29) is rotatably mounted inside the second rectangular positioning column (23), and the two clamping blocks (30) are rotatably mounted on the outer surface of the rotating column (29), respectively. A plurality of limit blocks (4) are provided, and the plurality of limit blocks (4) are arranged in a stacked manner. The top surfaces of the limit blocks (4) are all arc-shaped. The two clamping blocks (30) are both in a U-shape that wraps around the limit blocks (4), and the two clamping blocks (30) are arranged opposite to each other.

5. The modular steel tube concrete column connector according to claim 4, characterized in that: The outer surface of the rotating column (29) is sleeved with a torsion spring (31), and both sides of the torsion spring (31) are fixedly connected to connecting ribs (32), and the other ends of the two connecting ribs (32) are respectively fixedly connected to one side of the two clamping blocks (30).

6. The modular steel tube concrete column connector according to claim 5, characterized in that: Rotating frames (6) are rotatably mounted on both sides of the bottom of the fixed connection seat (1), the bottoms of the two rotating frames (6) are rotatably connected to the bottom of the positioning rod (3), the outer surface of the positioning rod (3) located below the fixed connection seat (1) is sleeved with a tension spring (7), the inner side surfaces of the two rotating frames (6) are provided with triangular clamping blocks, and fixed rods (8) are fixedly mounted on both sides of the bottom surface of the buffer connection seat (2), a connecting plate is fixedly mounted on the bottom end of the fixed rod (8), and a moving rod (9) is fixedly connected to the bottom end of the other side of the connecting plate, and the moving rod (9) passes through the fixed connection seat (1) and is arranged to be compatible with the triangular clamping block.

7. The modular steel tube concrete column connector according to claim 6, characterized in that: The opposing surfaces of the fixed connection seat (1) and the buffer connection seat (2) are both provided with support blocks (5) for abutment, and the opposing surfaces of the two support blocks (5) are matched.

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