Modularized steel pipe concrete column connecting piece

Abstract

The invention relates to the technical field of concrete column installation, in particular to a modular steel pipe concrete column connecting piece which comprises a fixed connecting base and a concrete column body, a buffering connecting base is movably installed above the fixed connecting base, and the bottom face of the concrete column body is installed above the buffering connecting base in an inserted mode; the first limiting assembly is used for positioning the concrete column body and the buffer connecting seat and protecting the joint; the second limiting assembly is used for connecting and limiting multiple surfaces of the concrete column body; and the third limiting assembly is used for limiting and locking the concrete column body in the vertical direction. Compared with the prior art, the first limiting assembly is arranged to be matched with the third limiting assembly, so that the concrete column can keep stability in the vertical direction under the dynamic load action of earthquakes and the like, the anti-seismic performance of the whole structure is remarkably improved through cooperation of the first limiting assembly and the third limiting assembly, and displacement and damage caused by earthquakes are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of concrete column installation, and in particular 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 their advantages such as fast construction speed. They are usually prefabricated in factories and then transported to the site for assembly through connecting structures.

[0003] In the prior art, a Chinese patent document with publication number CN115977317B proposes a modular steel tube concrete column connection structure in which an extrusion piece is arranged in the insert tube. Under the action of a driving frame, the extrusion piece abuts against and squeezes the inner wall of the slot, and a reinforcement piece is arranged on the outer side of the insert tube. On the basis of the above, grouting is performed into the reinforcement frame through the grouting hole, and concrete is filled in the lower reinforcement frame, between the reinforcement frame and the inner wall of the insert tube, and between the outer wall of the insert tube and the inner wall of the slot. Compared with the existing connection and fixation only by connecting bolts, the connection strength is improved. However, consistent with the traditional method, the traditional steel tube concrete column connector often relies on welding or bolting during the connection process, and whether it is welding or Bolt fixing, the traditional connection method usually requires more manual adjustments and on-site operations. For example, the welding joints need to be checked and corrected during welding, while bolt fixing requires ensuring that each bolt is correctly installed and torqued in place. These manual operations not only increase the construction period, but also increase the possibility of human errors, which may affect the quality of the connection and the overall performance of the structure. Therefore, the cumbersomeness and complexity of traditional welding and bolt fixing methods during the installation process not only increase construction costs and time, but may also 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 of steel tube concrete column connections. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a modular steel tube concrete column connector to solve the problem that traditional connection methods usually require more manual adjustments and on-site operations, and are cumbersome and complex.

[0005] Based on the above purpose, the present invention provides a modular steel tube concrete column connector, comprising: 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 plugged and installed above the buffer connection seat; A first limiting assembly, comprising a positioning sleeve fixedly mounted in the middle of the upper end of the buffer connection seat, and a positioning groove provided at the bottom of the concrete column body, the positioning sleeve being adapted to the positioning groove, the positioning sleeve being hollow, and the first limiting assembly being used for positioning the concrete column body and the buffer connection seat and protecting the connection; A second limiting assembly, the second limiting assembly comprises a first rectangular positioning column fixedly mounted inside the positioning sleeve, and a second rectangular positioning column fixedly mounted inside the positioning groove, the second rectangular positioning column is sleeved with the first rectangular positioning column, the four outer sides of the first rectangular positioning column and the four inner sides of the second rectangular positioning column are all provided with mutually adapted connection modules, and the second limiting assembly is used to connect and limit multiple sides of the concrete column body; The third limiting assembly 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. The limiting block is fixedly installed on the top end of the positioning rod, and the clamping block is adapted to the limiting block. The third limiting assembly is used to limit and lock the concrete column body in the vertical direction.

[0006] Preferably, a sliding sleeve is slidably installed on the bottom outer surface 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 on the inner side of the bottom of the concrete column body, a plurality of through holes are opened on the bottom circumference of the positioning groove, and limiting beads are movably installed inside the plurality of through holes, a protrusion is provided on one side of the sliding sleeve to match with the limiting beads, and a limiting groove is provided on one side of the positioning sleeve to match with the limiting beads.

[0007] 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.

[0008] Preferably, the connecting module includes a first fixed plate fixedly installed on the four outer sides of the first rectangular positioning column, and a second fixed plate fixedly installed on the four inner sides of the second rectangular positioning column, a first pushing block and a second pushing block are fixedly installed on one side of the top surface of the first fixed plate and one side of the bottom surface of the second fixed plate, respectively, and a first rotating block and a second rotating block are rotatably installed in the middle of one side of the first fixed plate and the middle of one side of the second fixed plate, respectively.

[0009] Preferably, the first rotating block and the second rotating block are both semicircularly arranged, and the first rotating block and the second rotating block are adapted to each other.

[0010] Preferably, one side of the first rotating block and one side of the second rotating block are respectively fixedly connected with the first connecting rotating plate and the second connecting rotating plate, the middle of the first connecting rotating plate and the second connecting rotating plate are respectively fixedly connected with the first return spring and the third return spring, the other ends of the first return spring and the third return spring are respectively fixedly connected with one side of the first fixed plate and the second fixed plate, and one side of the first fixed plate and one side of the second fixed plate are also provided with a through groove adapted to the first connecting rotating plate or the second connecting rotating plate.

[0011] Preferably, a rotating column is rotatably installed inside the second rectangular positioning column, and the two clamping blocks are respectively rotatably installed on the outer surface of the rotating column. There are multiple limit blocks, and the multiple limit blocks are arranged in a stacked manner. The top surfaces of the limit blocks are both arc-shaped, and the two clamping blocks are both U-shaped that wraps the limit blocks, and the two clamping blocks are arranged opposite to each other.

[0012] Preferably, a torsion spring is sleeved on the outer surface of the rotating column, and connecting ribs are fixedly connected to both sides of the torsion spring, and the other ends of the two connecting ribs are fixedly connected to one side of the two clamping blocks respectively.

[0013] Preferably, rotating frames are rotatably installed on both sides of the bottom of the fixed connecting seat, the bottoms of the two rotating frames are rotatably connected to the bottoms of the positioning rods, the outer surfaces of the positioning rods located below the fixed connecting seat are sleeved with tension springs, and the inner sides of the two rotating frames are provided with triangular clamping blocks, and fixed rods are fixedly installed on both sides of the bottom surface of the buffer connecting seat, a connecting plate is fixedly installed on the bottom end of the fixed rod, and a moving rod is fixedly connected to the bottom end of the other side of the connecting plate, and the moving rod passes through the fixed connecting seat and is adapted to the triangular clamping block.

[0014] Preferably, the opposite surfaces of the fixed connection seat and the buffer connection seat are both provided with support blocks for abutment, and the opposite surfaces of the two support blocks are matched.

[0015] Beneficial effects of the present invention: 1. This modular steel tube concrete column connector is provided with a first limiting component and a third limiting component. The first limiting component realizes preliminary precise positioning through the cooperation of the positioning sleeve and the positioning groove. The adaptation design of the positioning sleeve and the positioning groove ensures that the concrete column body can be accurately aligned with the buffer connection seat during installation, thereby reducing the installation error, so that the concrete column body can be accurately positioned in 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 limit assembly realizes the locking of the concrete column body in the vertical direction through the interaction of the positioning rod, the limit 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 with their own weight. The concrete column body can be quickly aligned with the positioning sleeve, reducing the complicated operations during the installation process. The vertical locking setting of the third limit assembly enables the concrete column to 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.

[0016] 2. This modular steel tube concrete column connector constructs an efficient multi-faceted locking system by arranging a connection module in the second limiting assembly and by installing the first fixing plate and the second fixing plate on the four faces of the first rectangular positioning column and the second rectangular positioning column. In the process of docking the concrete column body with the positioning sleeve, multiple components of the connection module work together to achieve stable positioning and locking of the first rectangular positioning column and the second rectangular positioning column through the interaction between the pushing block and the rotating block. Specifically, the second fixing plate pushes the first fixing plate on its inner side, causing the first pushing block and the second pushing block to contact and push the first rotating block and The second rotating block rotates, thereby driving the rotation of the connecting rotating plate and pulling the reset spring. This process not only allows the pushing block to enter the corresponding fixed plate to complete the multi-faceted connection and locking, but also ensures the stable reset of the first rotating block and the second rotating block in the locked state through the action of the reset spring, thereby forming a tight multi-faceted locking structure, which greatly improves the connection strength and shear resistance of the concrete column body, thereby effectively dispersing the load, improving the shear resistance, and ensuring the overall stability and safety of the structure. In addition, the modular design simplifies the installation process, reduces construction time and errors, and further improves the economy and reliability of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the decomposition structure of the present invention; Figure 3 It is a schematic diagram of the plane structure of the present invention; Figure 4 It is a schematic diagram of the partial cutaway structure of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle; Figure 6 This is a schematic diagram of the internal structure of the positioning sleeve of the present invention; Figure 7 This is a schematic diagram of the structure of the connecting seat of the present invention; Figure 8 For the present invention Figure 6 The enlarged structural diagram at B in the middle; Fig. 9 This is a schematic diagram of the bottom structure of the concrete column body of the present invention; Fig.10 For the present invention Fig. 9 The enlarged structural diagram at C in the middle; Fig.11 This is a schematic diagram of the connection module structure of the present invention; Fig.12 This is a schematic diagram of the connection structure of the third limiting component of the present invention; Fig.13 It is a schematic diagram of the connection structure of the first limiting component of the present invention.

[0019] The markings in the figure are: 1. Fixed connecting seat; 2. Buffer connecting seat; 3. Positioning rod; 4. Limiting block; 5. Support block; 6. Rotating frame; 7. Tension spring; 8. Fixed rod; 9. Moving rod; 10. Positioning sleeve; 11. Limiting groove; 12. First rectangular positioning column; 13. First fixed 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 column; 24. Second fixed 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 DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0021] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like 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; 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.

[0023] like Figure 2 , Figure 3 , Figure 4 , Fig.13 As shown, a sliding sleeve 19 is slidably installed on the outer surface of the bottom of the concrete column body 18, and 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, and a plurality of through holes are provided on the bottom circumference of the positioning groove 21, and a limiting bead 22 is movably installed inside the plurality of through holes. A protrusion is provided on one side of the sliding sleeve 19 to match the limiting bead 22, and a limiting groove 11 is provided on one side of the positioning sleeve 10 to match the limiting bead 22. The outer surface of the sliding sleeve 19 is concave, and the maximum diameter of the sliding sleeve 19 is greater than the maximum diameter of the concrete column body 18. When the concrete column body 18 is docked with the buffer connection seat 2, it is preferred to place a plurality of raised jacks 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, and then drives the sliding sleeve 19 to slide upward and squeeze the second return spring 20. At this time, the limiting bead 22 has released the force applied by the sliding sleeve 19 on the outer surface, so the limiting bead 22 will not affect the concrete column body being lowered and installed. 18 obstruction is that the positioning sleeve 10 can easily enter the interior of the positioning groove 21. When the positioning sleeve 10 is completely wrapped by the positioning groove 21, the position of the limiting groove 11 is exactly at the position of the limiting bead 22. This is to unload the force of the jack, so that the sliding sleeve 19 moves downward, and gradually pushes the limiting bead 22 into the limiting groove 11 for limiting. At the same time, the sliding sleeve 19 also protects the connection and wraps it in all aspects to prevent the external environment from eroding and damaging the connection, thereby improving the durability of the connection.

[0024] like Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 , Fig.11As shown, the connection module includes 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 in the middle of one side of the first fixed plate 13 and the middle of one side of the second fixed plate 24, respectively. The first rotating block 16 and the second rotating block 27 are both semicircular in shape, and the first rotating block 16 and the second rotating block 27 are The first rotating block 16 and the second rotating block 27 are adapted to each other, and the first connecting rotating plate 15 and the second connecting rotating plate 26 are fixedly connected to one side of the first rotating block 16 and the second rotating block 27, respectively. The first connecting rotating plate 15 and the second connecting rotating plate 26 are fixedly connected to the middle of the first connecting rotating plate 15 and the second connecting rotating plate 26, respectively. The other ends of the first returning spring 17 and the third returning spring 28 are fixedly connected to one side of the first fixing plate 13 and the second fixing plate 24, respectively. A through groove adapted to the first connecting rotating plate 15 or the second connecting rotating plate 26 is also provided on one side of the first fixing plate 13 and the second fixing plate 24. When the concrete column body 18 is docked with the positioning sleeve 10, the second rectangular positioning column 23 inside the positioning groove 21 follows and docks downward, and is gradually sleeved on the outside of the first rectangular positioning column 12 inside the positioning sleeve 10. In the sleeve process, the four faces of the first rectangular positioning column 12 and the second rectangular positioning column 23 are simultaneously connected, positioned and locked through the connection module, further increasing the multi-faceted connection force of the concrete column body 18. In the process of connecting the first rectangular positioning column 12 and the second rectangular positioning column 23, the multiple second fixing plates 24 on the inner side of the second rectangular positioning column 23 are first moved toward the first fixing plate 13 on the outer surface of the first rectangular positioning column 12, so that the first pushing block 14 and the second pushing block 25 are respectively in contact with the first rotating block 16 and the second rotating block 16. The second rotating block 27 pushes the first rotating block 16 and the second rotating block 27 to rotate respectively. During the rotation 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, and the first return spring 17 and the third return spring 28 are driven to pull until the rotation does not hinder the first pushing block 14 from entering the second fixed plate 24, and the second pushing block 25 enters the first fixed plate 13. At this time, the first rotating block 16 and the second rotating block 27 are close to each other, and 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, thereby driving the first rotating block 16 and the second rotating block 27 to synchronously rotate and lock the first pushing block 14 and the second pushing block 25.

[0025] like Figure 2 , Figure 3 , Figure 7 , Fig.12As shown, a rotating column 29 is rotatably installed inside the second rectangular positioning column 23, and two clamping blocks 30 are rotatably installed 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 the limit blocks 4, and the two clamping blocks 30 are arranged opposite to each other. A torsion spring 31 is sleeved on the outer surface of the rotating column 29, and 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 to one side of the two clamping blocks 30, and both sides of the bottom of the fixed connection seat 1 are rotatably installed A rotating frame 6 is installed, and the bottom of the two rotating frames 6 is 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. Fixed rods 8 are fixedly installed on both sides of the bottom surface of the buffer connection seat 2. A connecting plate is fixedly installed at the bottom end of the fixed rod 8. A moving rod 9 is fixedly connected to the bottom end of the other side of the connecting plate. The moving rod 9 penetrates the fixed connection seat 1 and is adapted to the triangular clamping block. The opposite surfaces of the fixed connection seat 1 and the buffer connection seat 2 are provided with support blocks 5 for abutment, and the opposite surfaces of the two support blocks 5 are adapted to each other. During the process of the concrete column body 18 docking downward, during the process of the first limit assembly docking, the two clamping blocks 30 inside the third positioning assembly will be synchronously driven to move downward. At this time, they will first contact the top surface of the limit block 4, first press the positioning rod 3 to move downward for a distance and pull the tension spring 7, which will cause the two rotating frames 6 to rotate a short 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 limit block 4 on top to rotate a short distance so that they can accommodate the limit block 4. At this time, when there is no pressure on the limit block 4, the tension spring 7 is reset, driving the positioning rod 3 to push upward for a distance, so that multiple limit blocks 4 can quickly After entering the two clamping blocks 30, the clamping block 30 will not clamp only one of the limit blocks 4, thereby achieving multiple vertical protections. After the limit block 4 enters the two clamping blocks 30, the lifting force of the limit block 4 on the two clamping blocks 30 is released, and under the action of the torsion spring 31, the two clamping blocks 30 are pulled to reset, so that they limit and clamp the bottom of the limit block 4. At this time, the first limit component is also limited synchronously, and cooperates with the first limit component to achieve a further connection. There is no need to use bolts for docking at the connection position, and the docking can be completed by using the dead weight of the concrete column downward, and in conjunction with the second limit component, a better connection effect can be achieved.

[0026] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative 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 may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0027] 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 principles of the present invention should be included in the scope of protection 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 comprises 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 the vertical direction.

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: 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 pushing block (14) and a second pushing block (25) are respectively 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); a first rotating block (16) and a second rotating block (27) are respectively 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).

5. The modular steel tube concrete column connector according to claim 4, characterized in that: The first rotating block (16) and the second rotating block (27) are both arranged in a semicircular shape, and the first rotating block (16) and the second rotating block (27) are adapted to each other.

6. The modular steel tube concrete column connector according to claim 5, characterized in that: 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 adapted to the first connecting rotating plate (15) or the second connecting rotating plate (26).

7. 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.

8. The modular steel tube concrete column connector according to claim 7, 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).

9. The modular steel tube concrete column connector according to claim 8, 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.

10. The modular steel tube concrete column connector according to claim 9, 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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