PC beam column joint connecting device

Abstract

The invention relates to the technical field of PC component connecting devices, in particular to a PC beam column joint connecting device which comprises a beam column, a cross beam and a bracket fixed to one side of the beam column, a fixing hole is formed in one end of the cross beam, and the bracket and the cross beam are fixed through an adjustable connecting mechanism; the adjustable connecting mechanism comprises a bottom plate arranged on the upper side of the bracket, a hollow column is fixed to the center of the upper side of the bottom plate, and a center rotating shaft is rotationally connected to the inner side of the hollow column. Through the adjustable connecting mechanism, after the cross beam is connected to the bracket, the height of one end of the cross beam can be slightly adjusted according to the horizontal angle of the cross beam and the relative position data between the cross beam and the beam column, and therefore the horizontal angle of the cross beam or the relative position between the cross beam and the beam column can be adjusted more conveniently; therefore, the assembly precision of the beam column and the cross beam is prevented from being influenced by settlement of the beam column.

Description

Technical Field

[0001] The present invention relates to the technical field of PC component connection devices, in particular to a PC beam-column node connection device. Background Art

[0002] PC is the abbreviation of precast concrete parts, which is called PC components in the field of residential industrialization. Existing prefabricated buildings have greatly improved the construction efficiency of prefabricated buildings by making extensive use of PC components. When assembling the beams and crossbeams in PC components, the nodes between the two need to be connected and fixed through connecting devices.

[0003] After searching, the Chinese patent with publication number: CN110145023A discloses a prefabricated assembled concrete rectangular beam-column connection node, including a prefabricated column, a prefabricated beam, an equilateral angle steel, an L-shaped steel plate, a panel, high-strength bolts, and steel bars. Two corbels are symmetrically provided on the prefabricated column, the equilateral angle steels are respectively arranged at the upper and lower ends of the prefabricated beam, the high-strength bolts fasten the equilateral angle steels to the prefabricated column and the prefabricated beam, the high-strength bolts respectively penetrate the prefabricated column and the prefabricated beam, the panel is respectively arranged at both ends of the prefabricated beam, the high-strength bolts fasten the panel to the prefabricated beam, the L-shaped steel plate is arranged at the end of the corbel away from the prefabricated column, and the steel bars anchor the L-shaped steel plate to the prefabricated beam and the corbel.

[0004] Based on the above search and combined with actual problems, it was found that the existing node connection device cannot accurately adjust the height of the beam end before and after the beam is connected and fixed to the beam column. Since the foundation of the beam column may have a certain settlement when it is erected, if the foundation settlement causes the height of the beam column to decrease, it will cause the beam connected to the beam column to tilt, reducing the connection accuracy of the PC components in the prefabricated building. Summary of the Invention

[0005] The object of the present invention is to provide a PC beam-column node connection device to solve the problems raised in the above background technology.

[0006] The lockhole that is formed on the upper end of the swing arm is formed on the upper end of the swing arm, and the swing arm end face has a hook portion, and a bar passes position between the end of the swing arm and the hook portion.

[0007] Preferably, the upper side of each of the first sliding blocks is provided with a lower inclined surface, and the lower side of each of the second sliding blocks is provided with an upper inclined surface that slides with the lower inclined surface.

[0008] Preferably, a limiting cylinder is fixed at the middle position on the inner side of the hollow column, and a limiting ring is fixed at the middle position on the outer side of the central shaft, and the upper and lower ends of the limiting ring are rotatably connected to the inner side of the limiting cylinder through balls.

[0009] Preferably, a slider guide groove is provided on the upper side of the bottom plate at a position corresponding to each first slider, and each first slider is slidably connected to the inner side of each slider guide groove.

[0010] Preferably, a limiting groove is provided on the surface of each upper inclined surface, and a limiting strip is fixed on the surface of each lower inclined surface, and each limiting strip is slidably connected to the inner side of the limiting groove at the corresponding position.

[0011] Preferably, the anti-loosening mechanism includes a limiting column arranged at the upper end of the inner side of the hollow column and a first rotating block fixed to the upper end of the central rotating shaft, the upper end of the first rotating block is provided with a first hexagonal groove, the inner upper end of the limiting column is connected to a small stud by threaded rotation, the upper end of the small stud is provided with a second hexagonal groove, and the lower end of the small stud is fixed with a frustum, the lower end of the limiting column is fixed with a hexagonal column adapted to the first hexagonal groove, and the inner lower end of the limiting column is slidably inserted with a plurality of tightening blocks arranged in a circle.

[0012] Preferably, the outer ends of the plurality of the pressing blocks are each provided with an arcuate surface adapted to the inner side of the hollow column, and the inner ends of the plurality of the pressing blocks are each provided with a conical surface adapted to the outer side of the truncated cone.

[0013] Preferably, a plurality of positioning pins arranged in a circumference are fixed to the upper side of the adjustment disk, and a positioning hole is provided inside the crossbeam at a position corresponding to each positioning pin.

[0014] Preferably, four bottom plate screws are provided through the four corners of the bottom plate, the lower ends of the four bottom plate screws are fixedly inserted into the inside of the corbel, and the upper ends of the four bottom plate screws are connected to the bottom plate nuts through threaded rotation.

[0015] Preferably, the outer upper end of the hollow column is provided with a second external thread, and the upper end of the hollow column is rotatably connected to a fixing nut through the second external thread.

[0016] The present invention provides a PC beam-column node connection device through improvement, which has the following improvements and advantages compared with the prior art: First, the present invention uses an adjustable connection mechanism. After the crossbeam is connected to the corbel, the height of one end of the crossbeam can be slightly adjusted according to the horizontal angle of the crossbeam and the relative position data between the crossbeam and the beam column, thereby more conveniently adjusting the horizontal angle of the crossbeam or adjusting the relative position between the crossbeam and the beam column, thereby avoiding the settlement of the beam column affecting the assembly accuracy of the beam column and the crossbeam.

[0017] Secondly, the present invention uses an anti-loosening mechanism to lock the central rotating shaft in the adjustable connecting mechanism after the height of the beam is adjusted, thereby preventing the vibration generated by the long-term use of the prefabricated building from causing the angle of the central rotating shaft to rotate, thereby preventing the positions of the multiple first sliders from moving, and further preventing the height of the adjustment disk and the height of the beam from moving slightly downward, ensuring that the relative position between the beam and the beam column does not change after the prefabricated building is used for a long time, thereby improving the reliability of the connection device.

[0018] Third: The present invention limits the first slider and the second slider that contact each other through the sliding connection between the limit groove and the limit bar to prevent the two from being misaligned, ensuring that the first slider and the second slider evenly apply upward thrust to the lower side of the adjusting disk, thereby ensuring that the adjusting disk maintains a horizontal angle and moves up and down, further improving the adjustment accuracy of the beam height. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a structural diagram of the connection state of the beam column and the cross beam of the present invention; Figure 2 This is a schematic diagram of the structure of the connection point between the beam and the beam column in the present invention; Figure 3 This is a schematic structural diagram of the adjustable connection mechanism of the present invention from a first viewing angle; Figure 4 Schematic diagram of the cross-sectional structure of the adjustable connecting mechanism of the present invention; Figure 5 It is a schematic structural diagram of multiple second sliding blocks in the present invention; Figure 6 A schematic diagram of the structure of the adjustable connection mechanism of the present invention from a second viewing angle; Figure 7 This is a schematic structural diagram of the adjustable connecting mechanism of the present invention in a disassembled state; Figure 8 It is a structural schematic diagram of the anti-loosening mechanism in the present invention.

[0021] Reference numerals: 1. Beam; 2. Corbel; 3. Crossbeam; 4. Fixing hole; 5. Base plate; 6. Hollow column; 7. Limiting cylinder; 8. Central rotating shaft; 9. First external thread; 10. Threaded slider; 11. Connecting rod; 12. First slider; 13. Adjusting plate; 14. Second slider; 15. Upper inclined surface; 16. Lower inclined surface; 17. Limiting groove; 18. Limiting strip; 19. Slider guide groove; 20. First rotating block; 21. First hexagonal groove; 22. Limiting ring; 23. Second external thread; 24. Limiting column; 25. Small stud; 26. Cone body; 27. Tightening block; 28. Conical surface; 29. ​​Positioning hole; 30. Positioning pin; 32. Fixing nut; 33. Base plate screw; 34. Base plate nut; 35. Hexagonal column; 36. Second hexagonal groove. DETAILED DESCRIPTION

[0022] The present invention is described in detail below, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] The present invention provides a PC beam-column node connection device through improvement. The technical solution of the present invention is: like Figures 1 to 8As shown, the embodiment of the present invention provides a PC beam-column node connection device, comprising a beam 1, a crossbeam 3 and two corbels 2 fixed on both sides of the beam 1, one end of the crossbeam 3 is provided with a fixing hole 4, and the corbels 2 and the crossbeam 3 are fixed by an adjustable connection mechanism; the adjustable connection mechanism includes a bottom plate 5 arranged on the upper side of the corbel 2, a hollow column 6 is fixed on the upper side of the bottom plate 5 at a center position, the inner side of the hollow column 6 is rotatably connected to a central rotating shaft 8, the outer lower end of the central rotating shaft 8 is rotatably connected to a threaded slider 10 through a first external thread 9, and a first rotating block 20 is fixed to the upper end of the central rotating shaft 8, the upper end of the first rotating block 20 is provided with a first hexagonal groove 21, the lower end of the threaded slider 10 is rotatably connected to a plurality of connecting rods 11, one end of each connecting rod 11 is rotatably connected to a first slider 12, an adjusting disk 13 is slidably provided on the outer side of the hollow column 6, and a plurality of second sliders 14 (combined with Figure 4 and Figure 5 ), an anti-loosening mechanism is provided at the upper end of the hollow column 6.

[0024] Furthermore, a lower inclined surface 16 is provided on the upper side of each first slider 12, and an upper inclined surface 15 is provided on the lower side of each second slider 14 for sliding engagement with the lower inclined surface 16; When the multiple first sliders 12 move around, the sliding cooperation between the lower inclined surface 16 and the upper inclined surface 15 can apply a vertical thrust to the multiple second sliders 14, thereby pushing the adjusting disk 13 to move upward along the outer side of the hollow column 6, and then the height of one end of the beam 3 can be raised. On the contrary, when the multiple first sliders 12 move toward the center, the multiple second sliders 14 move downward, thereby moving the adjusting disk 13 downward, and then the height of one end of the beam 3 can be lowered. Through the sliding cooperation between the lower inclined surface 16 and the upper inclined surface 15, the height of the adjusting disk 13 can be accurately adjusted, thereby adjusting the height of the beam 3, and the adjustment process is more labor-saving.

[0025] Furthermore, a limiting cylinder 7 is fixed at the middle position of the inner side of the hollow column 6, and a limiting ring 22 is fixed at the middle position of the outer side of the central shaft 8. The upper and lower ends of the limiting ring 22 are rotatably connected to the inner side of the limiting cylinder 7 through balls. The limiting cylinder 7 and the limiting ring 22 fix the axial position of the central rotating shaft 8 to prevent the central rotating shaft 8 from making a slight movement in the axial direction, thereby avoiding the threaded slider 10 from making a slight movement up and down, and further avoiding a slight relative sliding between the first slider 12 and the second slider 14, thereby ensuring the height adjustment accuracy of the adjustment disk 13.

[0026] Furthermore, a slider guide groove 19 is provided on the upper side of the base plate 5 at a position corresponding to each first slider 12. Each first slider 12 is slidably connected to the inner side of each slider guide groove 19. A limit groove 17 is provided on the surface of each upper inclined surface 15. A limit bar 18 is fixed to the surface of each lower inclined surface 16. Each limit bar 18 is slidably connected to the inner side of the limit groove 17 at the corresponding position. The moving directions of the multiple first sliders 12 are guided respectively by multiple slider guide grooves 19, so that each first slider 12 moves along a straight line. At the same time, the first slider 12 and the second slider 14 that contact each other are limited by the sliding connection between the limiting strip 18 on the upper side of each lower inclined surface 16 and the limiting groove 17 on the surface of each upper inclined surface 15 to prevent the two from being misaligned, thereby ensuring that the first slider 12 and the second slider 14 evenly apply upward thrust to the lower side of the adjustment disk 13, thereby ensuring that the adjustment disk 13 maintains a horizontal angle and moves up and down, further improving the adjustment accuracy of the height of the beam 3.

[0027] Furthermore, the anti-loosening mechanism includes a limit column 24 detachably arranged at the upper end of the inner side of the hollow column 6 and a first rotating block 20 fixed to the upper end of the central shaft 8. The upper end of the first rotating block 20 is provided with a first hexagonal groove 21 (such as Figure 7 As shown), the inner upper end of the limiting column 24 is connected to a small stud 25 by a threaded rotation, the upper end of the small stud 25 is provided with a second hexagonal groove 36, and the lower end of the small stud 25 is fixed with a truncated cone 26, and the lower end of the limiting column 24 is fixed with a hexagonal column 35 that matches the first hexagonal groove 21, and the inner lower end of the limiting column 24 is slidably inserted with a plurality of circumferentially arranged tightening blocks 27, the outer ends of the plurality of tightening blocks 27 are provided with an arc surface that matches the inner side of the hollow column 6, and the inner ends of the plurality of tightening blocks 27 are provided with a conical surface 28 that matches the outer side of the truncated cone 26; The small stud 25 is rotated, and the rotation of the small stud 25 drives the truncated cone 26 to move downward through the thread. When the truncated cone 26 moves downward, relative sliding occurs between its outer side and the conical surface 28 at the inner end of the multiple clamping blocks 27, thereby pushing the multiple clamping blocks 27 to move outward synchronously, so that the arc surface at the outer end of each clamping block 27 is pressed against the inner side of the hollow column 6, so that the limiting column 24 can be fixed to the inner side of the hollow column 6. Since the hexagonal column 35 and the first hexagonal groove 21 cannot rotate relative to each other after being matched, the first rotating block 24 can also be limited by the hexagonal column 35 after being fixed. 20 and the rotation of the central shaft 8 play an anti-loosening role, ensuring that the height of the adjusting disk 13 does not change, the curved surface can fully fit with the inner side of the hollow column 6, thereby improving the friction between the clamping block 27 and the hollow column 6, thereby improving the fixation firmness between the two, and further improving the anti-loosening effect, the conical surface 28 can make the inner end of the clamping block 27 fully contact with the frustum 26, and when the frustum 26 moves downward, it can drive multiple clamping blocks 27 to extend outward synchronously, so that the friction between each clamping block 27 and the inner side of the hollow column 6 is equal, further improving the anti-loosening effect.

[0028] Furthermore, a plurality of positioning pins 30 arranged in a circumferential pattern are fixed to the upper side of the adjustment disk 13, and a positioning hole 29 is provided inside the crossbeam 3 at a position corresponding to each positioning pin 30; The positioning action between the positioning pin 30 and the positioning hole 29 can prevent relative rotation between the crossbeam 3 and the hollow column 6, thereby improving the connection stability between the beam column 1 and the crossbeam 3.

[0029] Furthermore, four bottom plate screws 33 are provided at the four corners of the bottom plate 5. The lower ends of the four bottom plate screws 33 are fixedly inserted into the inside of the corbel 2, and the upper ends of the four bottom plate screws 33 are connected to the bottom plate nuts 34 through threads. The bottom plate 5 is fixed to the upper side of the corbel 2 by four bottom plate nuts 34 , thereby fixing the entire adjustable connection mechanism and improving the connection stability between the beam column 1 and the crossbeam 3 .

[0030] Furthermore, a second external thread 23 is provided on the outer upper end of the hollow column 6, and a fixing nut 32 is rotatably connected to the upper end of the hollow column 6 through the second external thread 23; After adjusting the height, rotate and install the fixing nut 32 on the upper end of the hollow column 6 at the position of the second external thread 23, and press the beam 3 against the upper side of the base plate 5 through the fixing nut 32, so as to quickly connect and fix the beam 3 and the beam column 1.

[0031] Working principle: When connecting the crossbeam 3 and the corbel 2, first fix the bottom plate 5 to the upper side of the corbel 2 through four bottom plate nuts 34, then place the crossbeam 3 on the upper side of the adjustment plate 13. During the installation process, the crossbeam 3 is positioned through multiple positioning pins 30 and multiple positioning holes 29, so that the hollow column 6 can be more accurately inserted into the inner side of the fixing hole 4 at one end of the crossbeam 3; When the first screw thread 14 is in the state of rotation and the first screw thread 14 is in the state of rotation, the first screw thread 14 is in the state of rotation and the first screw thread 14 is in the state of rotation. The plurality of second sliders 14 can be given a vertical thrust, thereby pushing the adjusting disk 13 to move upward along the outer side of the hollow column 6, thereby raising the height of one end of the beam 3. On the contrary, when the threaded slider 10 moves upward, the threaded slider 10 drives the plurality of connecting rods 11 to rotate in the vertical direction, thereby driving the plurality of first sliders 12 to move toward the center direction, thereby moving the plurality of second sliders 14 downward, thereby moving the adjusting disk 13 downward, thereby lowering the height of one end of the beam 3. The height of one end of the beam 3 can be adjusted by adjusting the forward and reverse rotation of the central rotating shaft 8. When assembling PC components, the assembly difficulty can be greatly reduced and the assembly efficiency can be improved. Moreover, when there is an error in the installation height of the beam column 1 or the foundation of the beam column 1 settles, the height of the beam 3 can be slightly adjusted by fine-tuning the height of the adjusting disk 13, thereby improving the assembly accuracy of the PC components. After the height is adjusted, the fixing nut 32 is rotated and installed at the position of the second external thread 23 on the upper end of the hollow column 6. The crossbeam 3 is pressed against the upper side of the bottom plate 5 by the fixing nut 32, so as to quickly connect and fix the crossbeam 3 and the beam column 1. After the fixing is completed, the limit column 24 of the anti-loosening mechanism is inserted into the inner side of the hollow column 6, and the hexagonal column 35 therein is inserted into the inner side of the first hexagonal groove 21. When the lower end of the hexagonal column 35 is aligned with the first hexagonal groove 21, the crossbeam 3 is pressed against the upper side of the bottom plate 5. When the inner bottom end of the shaped groove 21 is against each other, the small stud 25 is rotated, and the rotation of the small stud 25 drives the truncated cone 26 to move downward through the thread. When the truncated cone 26 moves downward, relative sliding occurs between its outer side and the conical surface 28 of the inner end of the multiple tightening blocks 27, thereby pushing the multiple tightening blocks 27 to move outward synchronously, so that the arc surface of the outer end of each tightening block 27 is pressed against the inner side of the hollow column 6, so that the limiting column 24 can be fixed on the inner side of the hollow column 6. After the limit column 24 is fixed, the hexagonal column 35 can limit the rotation of the first rotating block 20 and the central rotating shaft 8. When the beam column 1, the corbel 2, and the crossbeam 3 are subjected to long-term vibration, the adjusting disk 13 and the plurality of second sliders 14 will be driven to vibrate. The frequent vibration of the plurality of second sliders 14 will exert a certain horizontal force on the plurality of first sliders 12, pushing the plurality of first sliders 12 toward the center position, thereby driving the central rotating shaft 8 to generate a rotation trend in the opposite direction through the threaded slider 10. The central rotating shaft 8 transmits the rotational torque to the hexagonal column 35 through the first rotating block 20. Since the hexagonal column 35 and the limit column 24 have been fixed, the hexagonal column 35 can prevent the first rotating block 20 and the central rotating shaft 8 from continuing to rotate, thereby improving the reliability of the connection device and ensuring the durability of the prefabricated building and the accuracy of the connection position. The moving directions of the multiple first sliders 12 are guided respectively by multiple slider guide grooves 19, so that each first slider 12 moves along a straight line. At the same time, the first slider 12 and the second slider 14 that contact each other are limited by the sliding connection between the limiting strip 18 on the upper side of each lower inclined surface 16 and the limiting groove 17 on the surface of each upper inclined surface 15 to prevent the two from being misaligned, thereby ensuring that the first slider 12 and the second slider 14 evenly apply upward thrust to the lower side of the adjustment disk 13, thereby ensuring that the adjustment disk 13 maintains a horizontal angle and moves up and down, further improving the adjustment accuracy of the height of the beam 3.

[0032] The above description is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A PC beam-column node connection device, comprising a beam-column (1), a crossbeam (3), and two brackets (2) fixed on both sides of the beam-column (1), wherein one end of the crossbeam (3) is provided with a fixing hole (4), characterized in that: The corbel (2) and the crossbeam (3) are fixed via an adjustable connection mechanism; The adjustable connection mechanism comprises a bottom plate (5) arranged on the upper side of the corbel (2); a hollow column (6) is fixed at a central position on the upper side of the bottom plate (5); a central rotating shaft (8) is rotatably connected to the inner side of the hollow column (6); a threaded slider (10) is rotatably connected to the outer lower end of the central rotating shaft (8) via a first external thread (9); a first rotating block (20) is fixed to the upper end of the central rotating shaft (8); a first hexagonal groove (21) is provided at the upper end of the first rotating block (20); a plurality of connecting rods (11) are rotatably connected to the lower end of the threaded slider (10); one end of each connecting rod (11) is rotatably connected to the first slider (12); an adjusting disk (13) is slidably provided on the outer side of the hollow column (6); a plurality of second sliders (14) slidably connected to the first slider (12) are fixed to the lower surface of the adjusting disk (13); and an anti-loosening mechanism is provided at the upper end of the hollow column (6); The anti-loosening mechanism comprises a limiting column (24) arranged at the upper end of the inner side of the hollow column (6); the inner upper end of the limiting column (24) is rotatably connected to a small stud (25) through a thread; the upper end of the small stud (25) is provided with a second hexagonal groove (36); the lower end of the small stud (25) is fixed with a truncated cone (26); the lower end of the limiting column (24) is fixed with a hexagonal column (35) matched with the first hexagonal groove (21); and the inner lower end of the limiting column (24) is slidably inserted with a plurality of circumferentially arranged abutting blocks (27).

2. The PC beam-column node connection device according to claim 1, characterized in that: The upper side of each first sliding block (12) is provided with a lower inclined surface (16), and the lower side of each second sliding block (14) is provided with an upper inclined surface (15) that slidably cooperates with the lower inclined surface (16).

3. The PC beam-column node connection device according to claim 1, characterized in that: A limiting cylinder (7) is fixed at the middle section of the inner side of the hollow column (6), and a limiting ring (22) is fixed at the middle section of the outer side of the central rotating shaft (8). The upper and lower ends of the limiting ring (22) are rotatably connected to the inner side of the limiting cylinder (7) via balls.

4. The PC beam-column node connection device according to claim 1, characterized in that: A slider guide groove (19) is provided on the upper side of the bottom plate (5) at a position corresponding to each first slider (12), and each first slider (12) is slidably connected to the inner side of each slider guide groove (19).

5. The PC beam-column node connection device according to claim 2, characterized in that: A limiting groove (17) is provided on the surface of each upper inclined surface (15), and a limiting strip (18) is fixed on the surface of each lower inclined surface (16), and each limiting strip (18) is slidably connected to the inner side of the limiting groove (17) at a corresponding position.

6. The PC beam-column node connection device according to claim 1, characterized in that: The outer ends of the plurality of abutting blocks (27) are each provided with an arcuate surface matching the inner side of the hollow column (6), and the inner ends of the plurality of abutting blocks (27) are each provided with a conical surface (28) matching the outer side of the truncated cone (26).

7. The PC beam-column node connection device according to claim 1, characterized in that: A plurality of circumferentially arranged positioning pins (30) are fixed to the upper side of the adjustment disk (13), and a positioning hole (29) is provided inside the crossbeam (3) at a position corresponding to each positioning pin (30).

8. The PC beam-column node connection device according to claim 1, characterized in that: Four bottom plate screws (33) are provided through the four corners of the bottom plate (5), the lower ends of the four bottom plate screws (33) are fixedly inserted inside the corbel (2), and the upper ends of the four bottom plate screws (33) are rotatably connected to bottom plate nuts (34) through threads.

9. The PC beam-column node connection device according to claim 1, characterized in that: The upper outer end of the hollow column (6) is provided with a second external thread (23), and the upper end of the hollow column (6) is rotatably connected to a fixing nut (32) via the second external thread (23).

Images