Prefabricated building connecting structure

Abstract

The application relates to a fabricated building connecting structure, which comprises a connecting pipe, a connecting mechanism arranged on the connecting pipe, a rotating block and two rotating pipes, the axis of the rotating pipe is perpendicular to and intersects with the axis of the connecting pipe, the two rotating pipes are coaxially arranged, the two rotating pipes are symmetrically arranged about the connecting pipe, the rotating pipe is inserted on the connecting pipe, the rotating block is located in the connecting pipe, the rotating block is arranged between the two rotating pipes, one end of the rotating pipe is fixedly arranged on the rotating block, two inserting parts and two extruding parts are arranged on the rotating block, the two inserting parts and the two extruding parts are staggered around the axis of the rotating pipe, the rotating pipe is driven to rotate by a driving piece, in the process of connecting the reinforcing steel bars on the prefabricated part and the reinforcing steel bars on the wall body, only the rotating pipe needs to be rotated, the rotating block and the connecting pipe extrude the reinforcing steel bars, the reinforcing steel bars do not need to be wound, the labor intensity of workers is reduced, and the dismounting convenience is improved.

Description

Technical Field

[0001] This invention relates to a prefabricated building connection structure, belonging to the field of building connection technology. Background Technology

[0002] Prefabricated buildings refer to buildings where a large amount of on-site work in traditional construction methods is transferred to factories. Building components and accessories are processed and manufactured in factories, transported to the construction site, and assembled on-site using reliable connection methods.

[0003] Utility model patent application number CN202022284986.3 discloses a prefabricated building connector, including a connecting pipe and circular clamps. Circular clamps are welded to both ends of the connecting pipe, and pre-drilled holes are provided at both ends of each circular clamp. Structural plates are installed on both sides of the pre-drilled holes via mounting grooves, and clamping teeth are welded to one side of each structural plate. A structural block is welded inside the connecting pipe, and fixing bolts are connected to both ends of the connecting pipe via threaded grooves. This utility model involves inserting reinforcing bars from prefabricated components and walls into the pre-drilled holes on the circular clamps from both ends of the connecting pipe. Using a tool, the connecting pipe is rotated through a hexagonal groove. This rotation of the connecting pipe causes the reinforcing bars inserted into the connecting pipe to rotate through the circular clamps, causing the reinforcing bars to twist together. Using a tool, the fixing bolts are rotated to tighten the twisted reinforcing bars, pressing them into the clamping grooves on one side of the structural block, thus strengthening the connection. However, in existing technologies, the reinforcing bars need to be twisted together, which is not only inconvenient for disassembly but also requires significant labor intensity for workers.

[0004] Therefore, there is a need for a prefabricated building connection structure to improve the ease of disassembly and reduce the labor intensity of workers. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a prefabricated building connection structure that improves the ease of disassembly and reduces the labor intensity of workers.

[0006] The technical solution adopted by the present invention to solve the above problems is: a prefabricated building connection structure, including a connecting pipe, wherein a connecting mechanism is provided on the connecting pipe;

[0007] The connecting mechanism includes a rotating block and two rotating tubes. The axes of the rotating tubes are perpendicular to and intersect with the axis of the connecting tube. The two rotating tubes are coaxially arranged and symmetrically arranged about the connecting tube. The rotating tubes are inserted into the connecting tube. The rotating block is located inside the connecting tube and is positioned between the two rotating tubes. One end of each rotating tube is fixedly mounted on the rotating block. The rotating block has two insertion parts and two compression parts, which are staggered around the axis of the rotating tube. The rotating tubes are driven to rotate by a driving component, and the rotation of the rotating tubes causes the rotating block to rotate synchronously. When the two compression parts rotate to a position along the length of the connecting tube, the reinforcing bar is inserted into the connecting tube. When the two insertion parts rotate to a position along the length of the connecting tube, the compression parts compress the reinforcing bar, thus clamping it.

[0008] Preferably, the connecting pipe is provided with a groove, the groove is spherical, the center of the groove is located on the axis of the connecting pipe, the two ends of the groove are distributed along the length of the connecting pipe, and the rotating block is located in the groove;

[0009] The rotating block is spherical, with a diameter larger than the inner diameter of the connecting pipe and a diameter smaller than the diameter of the groove. The intersecting part is planar, and the two intersecting parts are parallel.

[0010] Preferably, the extrusion section is provided with an arc-shaped positioning groove, the two ends of which extend to two insertion sections respectively. During the insertion of the reinforcing bar into the connecting pipe, the rotation of the connecting pipe causes the two positioning grooves to be arranged along the length of the connecting pipe.

[0011] Preferably, the rotating block is provided with a cavity, the positioning groove is provided with an air hole, the rotating tube, the cavity and the air hole are connected in sequence, and both rotating tubes are provided with an air supply component, which delivers air from the rotating tube to the cavity.

[0012] Preferably, the air supply assembly includes a compression disc located inside a rotating tube. The compression disc is slidably and sealingly connected to the rotating tube. A push rod is fixedly provided at the end of the compression disc away from the rotating tube. The push rod extends from the end of the rotating tube away from the rotating block. A push plate is fixedly provided at the outer end of the push rod. A spring is provided between the push plate and the rotating tube. The two ends of the spring are respectively fixedly provided on the push plate and the rotating tube.

[0013] Preferably, the connecting mechanism further includes two locking components, each corresponding to one of the two rotating tubes. Each locking component includes an arc-shaped plate that matches the connecting tube and is fitted against the outer peripheral wall of the connecting tube. A sleeve is fixedly installed on the side of the arc-shaped plate away from the connecting tube, and a sleeve hole is provided on the sleeve. The sleeve hole is hexagonal and extends to the side of the arc-shaped plate near the connecting tube. The rotating tube consists of a cylindrical section and a prism section. One end of the cylindrical section is fixedly installed on a rotating block, and the prism section is fixedly installed at the other end of the cylindrical section. The prism section matches the sleeve hole, and the sleeve is fitted onto the prism section. The sleeve is locked to the prism section by a first screw.

[0014] Preferably, the prism segment abuts against the outer wall of the connecting pipe.

[0015] Preferably, the connecting pipe is further provided with two auxiliary mechanisms, which are respectively located at both ends of the connecting pipe, and the rotating block is located between the two auxiliary mechanisms;

[0016] The auxiliary mechanism includes a compression tube, a movable ring, a threaded tube, and a chamfer. The chamfer is located at the end of the connecting tube. The compression tube is frustum-shaped. The compression tube, movable ring, and threaded tube are all coaxially arranged with the connecting tube. The small-diameter end of the compression tube is inserted into the connecting tube. The compression tube matches the chamfer. The outer peripheral wall of the compression tube fits against the side wall of the chamfer. The small-diameter end of the compression tube is provided with a strip groove that extends to the inner and outer side walls of the compression tube. The threaded tube is sleeved on the outer peripheral wall of the connecting tube and is threadedly connected to the connecting tube. The movable ring fits against the large-diameter end of the compression tube and is fixedly mounted on the threaded tube.

[0017] Preferably, the connecting pipe is provided with two positioning components, and the two positioning components correspond one-to-one with the two extrusion parts;

[0018] The positioning assembly includes a positioning rod and multiple sets of locking grooves. The positioning rod is parallel to the connecting pipe and is detachably fixed to the connecting pipe by a second screw. The multiple sets of locking grooves are evenly distributed circumferentially around the axis of the connecting pipe. There are two locking grooves in the same set. The two locking grooves in the same set are respectively set on the outer peripheral wall of two threaded pipes. The locking grooves extend to the end of the threaded pipe near the rotating block. The locking grooves match the positioning rod, and the two ends of the positioning rod are respectively inserted into the two locking grooves of one set.

[0019] Preferably, a washer is fitted onto the second screw.

[0020] Compared with the prior art, the advantages of the present invention are as follows:

[0021] 1. During the connection process between the steel bars on the precast components and the steel bars on the wall, it is only necessary to rotate the rotating tube so that the rotating block and the connecting tube can squeeze the steel bars. There is no need to wrap the steel bars, which reduces the labor intensity of workers and improves the ease of disassembly.

[0022] 2. During the rebar connection process, impurities on the rebar can also be removed, preventing impurities from affecting the rebar connection effect. In addition;

[0023] 3. Improve the reliability of steel bar connections by compressing the shrinkage at the ends of the tubes;

[0024] 4. The compression of the reinforcing bars when the second screw is tightened can further improve the reliability of the reinforcing bar connection. Attached Figure Description

[0025] Figure 1 This is a perspective view of a prefabricated building connection structure according to the present invention;

[0026] Figure 2 This is a front view of a prefabricated building connection structure according to the present invention;

[0027] Figure 3 This is a top view of a prefabricated building connection structure according to the present invention;

[0028] Figure 4 This is a left view of a prefabricated building connection structure according to the present invention;

[0029] Figure 5 This is an exploded view of a prefabricated building connection structure according to the present invention;

[0030] Figure 6 This is a schematic diagram of the connecting mechanism in the compression state.

[0031] Figure 7 This is a structural diagram showing the interlocking state of the connecting mechanism;

[0032] Figure 8 This is a schematic diagram of the gas supply assembly.

[0033] Figure 9 This is a schematic diagram of the extruded tube structure;

[0034] Figure 10 This is a schematic diagram of the connection structure between the movable ring and the threaded pipe;

[0035] Figure 11 This is a schematic diagram of the locking assembly.

[0036] Figure 12 for Figure 1 Enlarged view of part A.

[0037] in:

[0038] Connecting pipe 1, connecting mechanism 2, auxiliary mechanism 3;

[0039] Rotating block 21, rotating tube 22, groove 23, positioning groove 24, cavity 25, air hole 26, air supply component 27, locking component 28;

[0040] Interlocking part 21.1, extrusion part 21.2;

[0041] Cylindrical segment 22.1, prism segment 22.2;

[0042] Extrusion plate 27.1, push rod 27.2, push plate 27.3, spring 27.4;

[0043] Arc plate 28.1, sleeve 28.2, sleeve hole 28.3, first screw 28.4;

[0044] Extrusion tube 31, moving ring 32, threaded tube 33, chamfer 34, strip groove 35, positioning assembly 36;

[0045] Positioning rod 36.1, locking groove 36.2, second screw 36.3, washer 36.4. Detailed Implementation

[0046] like Figure 1-12 As shown, a prefabricated building connection structure in this embodiment includes a connecting pipe 1, on which a connecting mechanism 2 is provided;

[0047] The connecting mechanism 2 includes a rotating block 21 and two rotating tubes 22. The axis of the rotating tube 22 is perpendicular to and intersects the axis of the connecting tube 1. The two rotating tubes 22 are coaxially arranged and symmetrically arranged about the connecting tube 1. The rotating tubes 22 are inserted into the connecting tube 1. The rotating block 21 is located inside the connecting tube 1 and is positioned between the two rotating tubes 22. One end of each rotating tube 22 is fixedly mounted on the rotating block 21. The rotating block 21 has two insertion parts 21.1 and two pressing parts 21.2, which are staggered around the axis of the rotating tube 22. The rotation of the rotating tube 22 drives the rotating block 21 to rotate synchronously. The rotation direction of the rotating tube 22 is within the worker's reach. Manually driven by tools, when the two extrusion parts 21.2 rotate to be distributed along the length of the connecting pipe 1, the structure is in an interlocking state. The steel bars on the precast component and the steel bars on the wall are inserted from both ends of the connecting pipe 1. The steel bars on the precast component pass through the gap between one of the interlocking parts 21.1 and the inner wall of the connecting pipe 1, and the steel bars on the wall pass through the gap between the other interlocking part 21.1 and the inner wall of the connecting pipe 1. Subsequently, the rotating pipe 22 continues to rotate, so that the two extrusion parts 21.2 extrude the two steel bars respectively, and make the steel bars abut against the inner wall of the connecting pipe 1 to achieve clamping of the steel bars, that is, to complete the connection between the steel bars on the precast component and the steel bars on the wall. At this time, the two interlocking parts 21.1 rotate to be distributed along the length of the connecting pipe 1, and the structure is in an extrusion state.

[0048] The connecting mechanism 2 further includes two locking components 28, each corresponding to one of the two rotating tubes 22. Each locking component 28 includes an arc-shaped plate 28.1, which matches the connecting tube 1 and fits against the outer peripheral wall of the connecting tube 1. A sleeve 28.2 is fixedly installed on the side of the arc-shaped plate 28.1 away from the connecting tube 1. A sleeve hole 28.3 is provided on the sleeve 28.2, which is hexagonal prism-shaped and extends to the side of the arc-shaped plate 28.1 near the connecting tube 1. The rotating tube 22 consists of a cylindrical segment 22.1 and a prism segment 22.2. One end of the cylindrical segment 22.1 is fixedly mounted on the rotating block 21, and the prism segment 22.2 is fixedly mounted on the rotating block 21. The prism segment 22.2 is fixedly set at the other end of the cylindrical segment 22.1. The prism segment 22.2 matches the sleeve hole 28.3. The sleeve 28.2 is fitted onto the prism segment 22.2. The sleeve 28.2 is locked to the prism segment 22.2 by the first screw 28.4. During the connection of the reinforcing bars, the first screw 28.4 is loosened and the sleeve 28.2 is removed from the prism. After the connection of the reinforcing bars is completed, the sleeve 28.2 is fitted onto the prism, and the arc plate 28.1 is made to fit with the connecting pipe 1. Finally, the first screw 28.4 is tightened. Through the fit between the arc plate 28.1 and the connecting pipe 1 and the cooperation between the sleeve 28.2 and the prism segment 22.2, the rotation of the rotating pipe 22 can be prevented from continuing to rotate, thus realizing the positioning of the connecting pipe 1, that is, the positioning of the rotating block 21.

[0049] The prism segment 22.2 abuts against the outer wall of the connecting pipe 1, thereby achieving the positioning of the rotating block 21 along the axial direction of the rotating pipe 22;

[0050] The connecting pipe 1 is provided with a groove 23, which is spherical. The center of the groove 23 is located on the axis of the connecting pipe 1, and the two ends of the groove 23 are distributed along the length of the connecting pipe 1. The rotating block 21 is located in the groove 23.

[0051] The rotating block 21 is spherical, the diameter of the rotating block 21 is larger than the inner diameter of the connecting pipe 1, the diameter of the rotating block 21 is smaller than the diameter of the groove 23, the intersecting part 21.1 is planar, and the two intersecting parts 21.1 are parallel.

[0052] The extrusion part 21.2 is provided with an arc-shaped positioning groove 24. The two ends of the positioning groove 24 extend to the two insertion parts 21.1 respectively. During the insertion of the reinforcing bar into the connecting pipe 1, the rotation of the connecting pipe 1 causes the two positioning grooves 24 to be arranged along the length direction of the connecting pipe 1. After the reinforcing bar is inserted, the connecting pipe 1 rotates to insert the reinforcing bar into the positioning groove 24, thereby preventing the reinforcing bar from shifting. The reinforcing bar is extruded by the inner wall of the positioning groove 24 and the inner wall of the groove 23, and the extrusion part 21.2 of the reinforcing bar is bent according to the shape of the positioning groove 24. The bent reinforcing bar avoids the longitudinal displacement between the reinforcing bar and the connecting pipe 1. In addition, it can also increase the contact area between the reinforcing bar and the rotating block 21, that is, increase the friction and prevent slippage. Furthermore, through the cooperation between the reinforcing bar and the positioning groove 24, the reinforcing bar is prevented from translating in a direction parallel to the axis of the rotating pipe 22, thereby improving the reliability of the reinforcing bar connection.

[0053] The rotating block 21 is provided with a cavity 25, and the positioning groove 24 is provided with a plurality of air holes 26. The plurality of air holes 26 are arranged along the length direction of the positioning groove 24. The rotating tube 22, the cavity 25 and the air holes 26 are connected in sequence. Both rotating tubes 22 are provided with air supply components 27. The air supply components 27 deliver air in the rotating tube 22 to the cavity 25. The air in the cavity 25 is discharged from the air holes 26. The air discharged from the air holes 26 acts on the reinforcing bar. Impurities will be generated during the reinforcing bar finishing process. The air discharged from the air holes 26 blows away the impurities on the reinforcing bar, avoiding the impurities from affecting the friction between the rotating block 21 and the reinforcing bar, and further improving the connection opening of the reinforcing bar.

[0054] The gas supply assembly 27 includes a pressing disc 27.1, which is located inside the rotating tube 22. The pressing disc 27.1 is slidably and sealingly connected to the rotating tube 22. A push rod 27.2 is fixedly installed at the end of the pressing disc 27.1 away from the rotating tube 22. The push rod 27.2 extends from the end of the rotating tube 22 away from the rotating block 21. A push plate 27.3 is fixedly installed at the outer end of the push rod 27.2. A spring 27.4 is installed between the push plate 27.3 and the rotating tube 22. The two ends of the spring 27.4 are respectively fixedly installed on the push plate 27.3 and the rotating tube 22. During the pressing of the steel bar, intermittent... When the push plate 27.3 is pressed, it causes the extrusion plate 27.1 to move towards the rotating block 21 within the rotating tube 22 via the push rod 27.2. This allows air in the rotating tube 22 to be transported into the cavity 25, where it is discharged from the air hole 26. This causes the spring 27.4 to deform. When the push plate 27.3 is released, the elasticity of the spring 27.4 resets the push plate 27.3 and the extrusion plate 27.1. Air in the connecting tube 1 is then transported from the air hole 26 into the cavity 25 and then into the rotating tube 22. This process is repeated to achieve the discharge of air from the air hole 26 and its effect on the reinforcing bar.

[0055] The connecting pipe 1 is also provided with two auxiliary mechanisms 3, which are respectively located at both ends of the connecting pipe 1. The rotating block 21 is located between the two auxiliary mechanisms 3. The auxiliary mechanisms 3 are used to further lock the reinforcing bars and improve the connection effect of the reinforcing bars.

[0056] The auxiliary mechanism 3 includes a compression tube 31, a moving ring 32, a threaded tube 33, and a chamfer 34. The chamfer 34 is located at the end of the connecting tube 1. The compression tube 31 is frustoconical. The compression tube 31, the moving ring 32, and the threaded tube 33 are all coaxially arranged with the connecting tube 1. The small-diameter end of the compression tube 31 is inserted into the connecting tube 1. The compression tube 31 matches the chamfer 34. The outer peripheral wall of the compression tube 31 fits against the side wall of the chamfer 34. The small-diameter end of the compression tube 31 is provided with a strip groove 35, which extends to the inner and outer side walls of the compression tube 31. The threaded tube 33 is sleeved on the outer peripheral wall of the connecting tube 1 and is threadedly connected to the connecting tube 1. The movable ring 32 is fitted with the large-diameter end of the extrusion tube 31. The movable ring 32 is fixedly mounted on the threaded tube 33. During the process of connecting the reinforcing bars, the threaded tube 33 and the extrusion tube 31 are first removed from the connecting tube 1. Then, the reinforcing bars are inserted into the connecting tube 1 after passing through the connecting ring and the extrusion tube 31 in sequence. After the rotating block 21 locks the reinforcing bars, the extrusion tube 31 is inserted into the connecting tube 1, and the threaded tube 33 is screwed onto the connecting tube 1. By moving the threaded tube 33 on the connecting tube 1, the movable ring 32 pushes the extrusion tube 31 to increase the depth of insertion into the connecting tube 1 until the small-diameter end of the extrusion tube 31 contracts and clamps the reinforcing bars, thereby achieving the locking of the reinforcing bars and further improving the reinforcing bar connection effect.

[0057] The connecting pipe 1 is provided with two positioning components 36, and the two positioning components 36 correspond one-to-one with the two extrusion parts 21.2;

[0058] The positioning assembly 36 includes a positioning rod 36.1 and multiple sets of locking grooves 36.2. The positioning rod 36.1 is parallel to the connecting pipe 1 and is detachably fixed to the connecting pipe 1 by a second screw 36.3. The multiple sets of locking grooves 36.2 are evenly distributed circumferentially around the axis of the connecting pipe 1. There are two locking grooves 36.2 in the same set. The two locking grooves 36.2 in the same set are respectively set on the outer peripheral wall of two threaded pipes 33. The locking grooves 36.2 extend to the end of the threaded pipe 33 near the rotating block 21. The locking grooves 36.2 match the positioning rod 36.1. The two ends of the positioning rod 36.1 are respectively inserted into the two locking grooves 36.2 in one set.

[0059] The width of the positioning block is equal to the width of the locking groove 36.2;

[0060] The positioning rod 36.1 and the two locking grooves 36.2 in the same group are engaged to lock the two threaded tubes 33 and the connecting tube 1, thus preventing the threaded tubes 33 from loosening.

[0061] After the second screw 36.3 is inserted into the groove 23 and the rotating block 21 has finished locking the steel bar, the end of the second screw 36.3 abuts against the steel bar by tightening the second screw 36.3, thereby improving the steel bar locking effect.

[0062] A washer 36.4 is fitted on the second screw 36.3. After calculation, washer 36.4 of different thicknesses are replaced to ensure that the positioning rod 36.1 is fixed so that the second screw 36.3 abuts against the reinforcing bar.

[0063] A method for connecting reinforcing bars, implemented using a prefabricated building connection structure, specifically includes the following steps:

[0064] S1. Loosen the first screw 28.4 and remove the sleeve 28.2 from the rotating tube 22;

[0065] S2. Unscrew the second screw 36.3 to separate the positioning rod 36.1 from the threaded tube 33;

[0066] S3. After unscrewing the threaded tube 33, pull the extrusion tube 31 out of the connecting tube 1;

[0067] S4. The reinforcing bars on the precast component pass through the moving ring 32 and threaded pipe 33 in one of the auxiliary mechanisms 3 and are then inserted into the connecting pipe 1. The reinforcing bars on the wall pass through the moving ring 32 and threaded pipe 33 in another auxiliary mechanism 3 and are then inserted into the connecting pipe 1. At this time, the prefabricated building connection structure is in an interlocking state. The reinforcing bars on the component pass through the gap between one of the interlocking parts 21.1 and the inner wall of the connecting pipe 1, and the reinforcing bars on the wall pass through the gap between the other interlocking part 21.1 and the inner wall of the connecting pipe 1.

[0068] S5. Rotating tube 22 rotates, causing the two extrusion parts 21.2 to extrude the two reinforcing bars respectively, and the reinforcing bars abut against the inner wall of connecting tube 1 to clamp the reinforcing bars. At the same time, the push plate 27.3 is pressed intermittently, causing the air hole 26 to release air intermittently and act on the reinforcing bars to remove impurities from the reinforcing bars. When the two insertion parts 21.1 rotate to be distributed along the length of connecting tube 1, the structure is in the extrusion state, that is, the connection between the reinforcing bars on the precast component and the reinforcing bars on the wall is completed.

[0069] S6. Sleeve 28.2 is fitted onto the prism, and the arc plate 28.1 is fitted with the connecting pipe 1. Tighten the first screw 28.4. Through the fit between the arc plate 28.1 and the connecting pipe 1 and the cooperation between the sleeve 28.2 and the prism segment 22.2, the rotating pipe 22 is prevented from continuing to rotate, thus achieving the positioning of the connecting pipe 1, that is, the positioning of the rotating block 21.

[0070] S7. After inserting the extrusion tube 31 into the connecting tube 1, tighten the threaded tube 33 onto the connecting tube 1. By moving the threaded tube 33 on the connecting tube 1, the moving ring 32 pushes the extrusion tube 31 to increase the length inserted into the connecting tube 1 until the small diameter end of the extrusion tube 31 clamps the reinforcing bar.

[0071] S8. Insert both ends of the positioning rod 36.1 into the two locking slots 36.2 of one set respectively, and tighten the second screw 36.3 to lock the two threaded tubes 33 with the connecting tube 1, so as to prevent the threaded tubes 33 from loosening, and at the same time make the end of the second screw 36.3 abut against the steel bar.

[0072] In summary, during the connection process between the reinforcing bars on the precast components and the reinforcing bars on the wall, it is only necessary to rotate the rotating tube 22 to compress the reinforcing bars by rotating the rotating block 21 and connecting tube 1. There is no need to wrap the reinforcing bars, which reduces the labor intensity of workers and improves the ease of disassembly. Moreover, during the connection process, impurities on the reinforcing bars can be removed, preventing impurities from affecting the connection effect. In addition, the reliability of the reinforcing bar connection is improved by the contraction of the end of the compression tube 31. Furthermore, the compression of the reinforcing bars when the second screw 36.3 is tightened can further improve the reliability of the reinforcing bar connection.

[0073] In addition to the above embodiments, the present invention also includes other embodiments. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present invention.

Claims

1. A prefabricated building connection structure comprising a connection tube (1), characterized in that: The connecting pipe (1) is provided with a connecting mechanism (2); The connecting mechanism (2) comprises a rotating block (21) and two rotating pipes (22), the axis of the rotating pipe (22) is perpendicular to and intersects with the axis of the connecting pipe (1), the two rotating pipes (22) are coaxially arranged, the two rotating pipes (22) are symmetrically arranged about the connecting pipe (1), the rotating pipe (22) penetrates the connecting pipe (1), the rotating block (21) is located in the connecting pipe (1), the rotating block (21) is arranged between the two rotating pipes (22), one end of the rotating pipe (22) is fixedly arranged on the rotating block (21), the rotating block (21) is provided with two penetrating portions (21.1) and two extruding portions (21.2), the two penetrating portions (21.1) and the two extruding portions (21.2) are alternately arranged around the axis of the rotating pipe (22), the rotating pipe (22) is driven to rotate by a driving member, the rotation of the rotating pipe (22) drives the rotating block (21) to rotate synchronously, when the two extruding portions (21.2) are rotated to be distributed along the length direction of the connecting pipe (1), the reinforcing steel bar is inserted into the connecting pipe (1), when the two penetrating portions (21.1) are rotated to be distributed along the length direction of the connecting pipe (1), the extruding portions (21.2) extrude the reinforcing steel bar, and the reinforcing steel bar is clamped; The connecting pipe (1) is provided with a groove (23), the groove (23) is spherical, the center of the groove (23) is located on the axis of the connecting pipe (1), and the two ends of the groove (23) are distributed along the length direction of the connecting pipe (1); the rotating block (21) is located in the groove (23); The rotating block (21) is spherical, the diameter of the rotating block (21) is greater than the inner diameter of the connecting pipe (1), the diameter of the rotating block (21) is smaller than the diameter of the groove (23), the penetrating portion (21.1) is a plane, and the two penetrating portions (21.1) are parallel; The extruding portion (21.2) is provided with an arc-shaped positioning groove (24), the two ends of the positioning groove (24) extend to the two penetrating portions (21.1) respectively, during the insertion of the reinforcing steel bar into the connecting pipe (1), the rotation of the connecting pipe (1) causes the two positioning grooves (24) to be arranged along the length direction of the connecting pipe (1); The connecting mechanism (2) further comprises two locking assemblies (28), and the two locking assemblies (28) correspond to the two rotating pipes (22) one by one. The locking assembly (28) comprises an arc-shaped plate (28.1) matched with the connecting pipe (1), the arc-shaped plate (28.1) is attached to the outer peripheral wall of the connecting pipe (1), a sleeve (28.2) is fixedly arranged on the side of the arc-shaped plate (28.1) away from the connecting pipe (1), a sleeve hole (28.3) is arranged on the sleeve (28.2), the sleeve hole (28.3) is hexagonal, the sleeve hole (28.3) extends to the side of the arc-shaped plate (28.1) close to the connecting pipe (1), the rotating pipe (22) is composed of a cylindrical segment (22.1) and a prism segment (22.2), one end of the cylindrical segment (22.1) is fixedly arranged on the rotating block (21), the prism segment (22.2) is fixedly arranged on the other end of the cylindrical segment (22.1), the prism segment (22.2) is matched with the sleeve hole (28.3), the sleeve (28.2) is sleeved on the prism segment (22.2), and the sleeve (28.2) is locked with the prism segment (22.2) through the first screw (28.4).

2. The prefabricated building connecting structure according to claim 1, characterized in that: The rotating block (21) is provided with a cavity (25), the positioning groove (24) is provided with an air hole (26), the rotating pipe (22), the cavity (25) and the air hole (26) are sequentially communicated, and the two rotating pipes (22) are provided with a gas supply assembly (27), and the air in the rotating pipe (22) is transported into the cavity (25) through the gas supply assembly (27).

3. The prefabricated building connecting structure according to claim 2, characterized in that: The gas supply assembly (27) comprises an extrusion disc (27.1), the extrusion disc (27.1) is located in the rotating pipe (22), the extrusion disc (27.1) is in sliding and sealed connection with the rotating pipe (22), one end of the extrusion disc (27.1) away from the rotating pipe (22) is fixedly provided with a push rod (27.2), the push rod (27.2) extends out of the end of the rotating pipe (22) away from the rotating block (21), the outer end of the push rod (27.2) is fixedly provided with a push disc (27.3), a spring (27.4) is arranged between the push disc (27.3) and the rotating pipe (22), and the two ends of the spring (27.4) are fixedly arranged on the push disc (27.3) and the rotating pipe (22) respectively.

4. The prefabricated building connecting structure according to claim 1, characterized in that: The prism segment (22.2) abuts against the outer wall of the connecting pipe (1).

5. The prefabricated building connecting structure according to claim 1, characterized in that: The connecting pipe (1) is also provided with two auxiliary mechanisms (3), the two auxiliary mechanisms (3) are arranged at the two ends of the connecting pipe (1) respectively, and the rotating block (21) is located between the two auxiliary mechanisms (3); The auxiliary mechanism (3) comprises a pressing pipe (31), a moving ring (32), a threaded pipe (33) and a chamfer (34), the chamfer (34) is arranged at the end of the connecting pipe (1), the pressing pipe (31) is a circular truncated cone, the pressing pipe (31), the moving ring (32) and the threaded pipe (33) are coaxially arranged with the connecting pipe (1), the small-diameter end of the pressing pipe (31) is inserted into the connecting pipe (1), the pressing pipe (31) is matched with the chamfer (34), the outer peripheral wall of the pressing pipe (31) is attached to the side wall of the chamfer (34), the small-diameter end of the pressing pipe (31) is provided with a strip-shaped groove (35), the strip-shaped groove (35) extends to the inner side wall and the outer side wall of the pressing pipe (31), the threaded pipe (33) is sleeved on the outer peripheral wall of the connecting pipe (1), the threaded pipe (33) is threadedly connected with the connecting pipe (1), the moving ring (32) is attached to the large-diameter end of the pressing pipe (31), and the moving ring (32) is fixedly arranged on the threaded pipe (33).

6. The prefabricated building connecting structure according to claim 5, characterized in that: Two positioning assemblies (36) are arranged on the connecting pipe (1), and the two positioning assemblies (36) correspond to the two pressing portions (21.2) one by one. The positioning assembly (36) comprises a positioning rod (36.1) and a plurality of locking grooves (36.2), the positioning rod (36.1) is parallel to the connecting pipe (1), the positioning rod (36.1) is detachably and fixedly connected with the connecting pipe (1) through a second screw (36.3), the plurality of locking grooves (36.2) are uniformly distributed in the circumferential direction and take the axis of the connecting pipe (1) as the center, each group of locking grooves (36.2) is provided with two, and the two locking grooves (36.2) in the same group are arranged on the outer peripheral walls of the two threaded pipes (33), the locking grooves (36.2) extend to one end of the threaded pipe (33) close to the rotating block (21), the locking grooves (36.2) are matched with the positioning rod (36.1), and the two ends of the positioning rod (36.1) are respectively inserted into the two locking grooves (36.2) in one group.

7. The prefabricated building connecting structure according to claim 6, characterized in that: The second screw (36.3) is sleeved with a gasket (36.4).

Images