A PC beam-column joint connection device

Abstract

The present invention relates to the technical field of PC component connection devices, and particularly relates to a PC beam-column joint connection device, which includes a beam-column, a cross beam, and a bracket fixed on one side of the beam-column. A fixing hole is provided at one end of the cross beam, and the bracket and the cross beam are fixed through an adjustable connection mechanism; the adjustable connection mechanism includes a bottom plate arranged on the upper side of the bracket, a hollow column is fixed at the central position on the upper side of the bottom plate, and a central rotating shaft is rotatably connected inside the hollow column. Through the adjustable connection mechanism of the present invention, 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, so as to more conveniently adjust the horizontal angle of the cross beam or the relative position between the cross beam and the beam-column, thereby avoiding the settlement of the beam-column from affecting the assembly accuracy of the beam-column and the cross beam.

Description

Technical Field

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

[0002] PC is the English abbreviation of precast concrete components, which are called PC components in the field of residential industrialization. In existing prefabricated buildings, the use of a large number of PC components has greatly improved the construction efficiency of prefabricated buildings. When assembling the beam-column and cross beam in PC components, a connection device is required to connect and fix the nodes between the two.

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

[0004] Based on the above retrieval and combined with practical problems, it is found that: before and after connecting and fixing the cross beam to the beam-column, the existing node connection device cannot accurately adjust the height of the end of the cross beam. Since there may be a certain settlement in the foundation when the beam-column is erected, if the settlement of the foundation causes the height of the beam-column to decrease, it will cause the cross beam connected to the beam-column to tilt, reducing the connection accuracy of PC components in prefabricated buildings. Summary of the Invention

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

[0006] The technical solution of the present invention is: a PC beam-column joint connection device, including a beam-column, a cross beam, and two bracket columns fixed on both sides of the beam-column. A fixing hole is provided at one end of the cross beam, and the bracket columns and the cross beam are fixed through adjustable connection mechanisms; the adjustable connection mechanism includes a bottom plate arranged on the upper side of the bracket column. A hollow column is fixed at the central position on the upper side of the bottom plate. A central rotating shaft is rotatably connected to the inner side of the hollow column. The lower end of the outer side of the central rotating shaft is rotationally connected with a threaded slider through a first external thread, and a first rotating block is fixed at the upper end of the central rotating shaft. A first hexagonal groove is provided at the upper end of the first rotating block. The lower end of the threaded slider is rotatably connected with a plurality of connecting rods, and one end of each connecting rod is rotatably connected with a first slider. An adjusting disc is slidably arranged on the outer side of the hollow column. A plurality of second sliders slidably connected with the first sliders are fixed on the lower surface of the adjusting disc. A loosening prevention mechanism is arranged at the upper end of the hollow column.

[0007] Preferably, an inclined surface is provided on the upper side of each first slider, and an upper inclined surface slidably matched with the inclined surface is provided on the lower side of each second slider.

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

[0009] Preferably, slider guiding grooves are provided on the upper side of the bottom plate corresponding to the positions of each first slider, and each first slider is respectively slidably connected to the inner side of each slider guiding groove.

[0010] Preferably, limiting grooves are provided on the surfaces of each upper inclined surface, limiting bars are fixed on the surfaces of each lower inclined surface, and each limiting bar is respectively slidably connected to the inner side of the limiting groove at the corresponding position.

[0011] Preferably, the loosening prevention mechanism includes a limiting column arranged at the upper end of the inner side of the hollow column and a first rotating block fixed at the upper end of the central rotating shaft. A first hexagonal groove is provided at the upper end of the first rotating block. A small screw is rotationally connected to the upper end of the inner part of the limiting column through a thread. A second hexagonal groove is provided at the upper end of the small screw, and a frustum is fixed at the lower end of the small screw. A hexagonal column adapted to the first hexagonal groove is fixed at the lower end of the limiting column. A plurality of abutting blocks arranged in a circumferential arrangement are slidably inserted into the lower end of the inner part of the limiting column.

[0012] Preferably, arc-shaped surfaces adapted to the inner side of the hollow column are provided at the outer ends of the plurality of abutting blocks, and tapered surfaces adapted to the outer side of the frustum are provided at the inner ends of the plurality of abutting blocks.

[0013] Preferably, a plurality of positioning pins arranged in a circular pattern are fixed to the upper side of the adjusting disc, and positioning holes are provided inside the cross beam corresponding to the positions of each positioning pin.

[0014] Preferably, four base plate screws are penetrated through the four corners of the base plate, the lower ends of the four base plate screws are fixedly inserted into the inside of the bracket, and the upper ends of the four base plate screws are rotationally connected with base plate nuts through threads.

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

[0016] The present invention provides a PC beam-column joint connection device through improvement. Compared with the prior art, it has the following improvements and advantages:

[0017] Firstly: Through the adjustable connection mechanism of the present invention, 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, so as to more conveniently adjust the horizontal angle of the cross beam or the relative position between the cross beam and the beam-column, thereby avoiding the settlement of the beam-column from affecting the assembly accuracy of the beam-column and the cross beam.

[0018] Secondly: Through the anti-loosening mechanism of the present invention, after the height of the cross beam is adjusted, the central rotating shaft in the adjustable connection mechanism can be locked to prevent the angle of the central rotating shaft from rotating due to the vibration generated during the long-term use of the prefabricated building, thereby preventing the positions of the plurality of first sliders from moving, and further preventing the height of the adjusting disc and the cross beam from slightly moving downward, ensuring that the relative position between the cross beam and the beam-column does not change after the long-term use of the prefabricated building, and improving the use reliability of the connection device.

[0019] Thirdly: Through the sliding connection and cooperation between the limiting groove and the limiting strip, the mutually contacting first slider and second slider are limited to prevent them from being misaligned, ensuring that the first slider and the second slider uniformly apply an upward thrust to the lower side of the adjusting disc, thereby ensuring that the adjusting disc moves up and down at a horizontal angle, and further improving the adjustment accuracy of the cross beam height. Description of the Drawings

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1Schematic structural diagram of the connection state between the beam-column and the crossbeam of the present invention;

[0022] Figure 2 Schematic structural diagram at the connection point between the crossbeam and the beam-column in the present invention;

[0023] Figure 3 First perspective structural diagram of the adjustable connection mechanism in the present invention;

[0024] Figure 4 Cross-sectional structural diagram of the adjustable connection mechanism in the present invention;

[0025] Figure 5 Schematic structural diagram of multiple second sliders in the present invention;

[0026] Figure 6 Second perspective structural diagram of the adjustable connection mechanism in the present invention;

[0027] Figure 7 Schematic structural diagram of the disassembled state of the adjustable connection mechanism in the present invention;

[0028] Figure 8 Schematic structural diagram of the anti-loosening mechanism in the present invention.

[0029] Reference numerals:

[0030] 1. Beam-column; 2. Corbels; 3. Crossbeam; 4. Fixed holes; 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 disc; 14. Second slider; 15. Upper inclined surface; 16. Lower inclined surface; 17. Limiting groove; 18. Limiting strip; 19. Slider guiding groove; 20. First rotating block; 21. First hexagonal groove; 22. Limiting ring; 23. Second external thread; 24. Limiting post; 25. Small stud; 26. Frustum; 27. Tightening block; 28. Conical surface; 29. Positioning hole; 30. Positioning pin; 32. Fixed nut; 33. Base plate screw; 34. Base plate nut; 35. Hexagonal column; 36. Second hexagonal groove. Detailed implementation manners

[0031] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] The present invention provides a PC beam-column joint connection device through improvement. The technical solution of the present invention is as follows:

[0033] As shown Figures 1 to 8 in the figure, an embodiment of the present invention provides a PC beam-column joint connection device, which includes a beam-column 1, a cross beam 3, and two bracket feet 2 fixed on both sides of the beam-column 1. A fixing hole 4 is provided at one end of the cross beam 3, and the bracket feet 2 and the cross beam 3 are both fixed through an adjustable connection mechanism; the adjustable connection mechanism includes a bottom plate 5 arranged on the upper side of the bracket foot 2, a hollow column 6 is fixed at the 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, the lower end of the outer side of the central rotating shaft 8 is rotationally connected with a threaded slider 10 through a first external thread 9, and a first rotating block 20 is fixed at 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. The lower end of the threaded slider 10 is rotatably connected with a plurality of connecting rods 11, and one end of each connecting rod 11 is rotatably connected with a first slider 12. An adjusting disc 13 is slidably arranged on the outer side of the hollow column 6, and a plurality of second sliders 14 slidably connected with the first sliders 12 are fixed on the lower surface of the adjusting disc 13 (in combination Figure 4 with Figure 5 ), and a loosening prevention mechanism is arranged at the upper end of the hollow column 6.

[0034] Furthermore, a lower inclined surface 16 is arranged on the upper side of each first slider 12, and an upper inclined surface 15 slidably matched with the lower inclined surface 16 is arranged on the lower side of each second slider 14;

[0035] When the plurality of first sliders 12 move towards the surroundings, through the sliding cooperation between the lower inclined surface 16 and the upper inclined surface 15, a vertical thrust can be applied to the plurality of second sliders 14, thereby pushing the adjusting disc 13 to move upward along the outer side of the hollow column 6, and further the height of one end of the cross beam 3 can be raised. On the contrary, when the plurality of first sliders 12 move towards the center direction, the plurality of second sliders 14 move downward, so that the adjusting disc 13 moves downward, and further the height of one end of the cross 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 disc 13 can be accurately adjusted, so as to adjust the height of the cross beam 3, and the adjustment process is more labor-saving.

[0036] Furthermore, a limiting cylinder 7 is fixed at the middle position on the inner side of the hollow column 6, a limiting ring 22 is fixed at the middle position on the outer side of the central rotating shaft 8, and both the upper and lower ends of the limiting ring 22 are rotationally connected with the inner side of the limiting cylinder 7 through balls;

[0037] The limiting cylinder 7 and the limiting ring 22 fix the axial position of the central rotating shaft 8, prevent the central rotating shaft 8 from generating a small axial movement, thereby avoiding a small up and down movement of the threaded slider 10, and further avoiding a small relative sliding between the first slider 12 and the second slider 14, ensuring the accuracy of the height adjustment of the adjusting disc 13.

[0038] Further, slider guiding grooves 19 are provided on the upper side of the bottom plate 5 corresponding to the positions of each first slider 12. Each first slider 12 is respectively slidably connected to the inner side of each slider guiding groove 19. Limiting grooves 17 are formed on the surfaces of each upper inclined surface 15, and limiting bars 18 are fixed on the surfaces of each lower inclined surface 16. Each limiting bar 18 is respectively slidably connected to the inner side of the limiting groove 17 at the corresponding position;

[0039] The movement directions of the multiple first sliders 12 are guided by the multiple slider guiding grooves 19 respectively, so that each first slider 12 moves along a straight line. At the same time, through the sliding connection and cooperation between the limiting bars 18 on the upper side of each lower inclined surface 16 and the limiting grooves 17 on the surfaces of each upper inclined surface 15, the mutually contacting first slider 12 and second slider 14 are limited to prevent the two from being misaligned, ensuring that the first slider 12 and the second slider 14 uniformly apply an upward thrust to the lower side of the adjusting disc 13, thereby ensuring that the adjusting disc 13 moves up and down at a horizontal angle, and further improving the adjustment accuracy of the height of the cross beam 3.

[0040] Further, the anti-loosening mechanism includes a limiting column 24 detachably provided at the upper end inside the hollow column 6 and a first rotating block 20 fixed to the upper end of the central rotating shaft 8. A first hexagonal groove 21 (as Figure 7 shown) is formed at the upper end of the first rotating block 20. A small screw column 25 is rotationally connected to the upper end inside the limiting column 24 through a thread. A second hexagonal groove 36 is formed at the upper end of the small screw column 25, and a frustum 26 is fixed to the lower end of the small screw column 25. A hexagonal column 35 adapted to the first hexagonal groove 21 is fixed to the lower end of the limiting column 24. A plurality of abutting blocks 27 arranged in a circular pattern are slidably inserted into the lower end inside the limiting column 24. Arc surfaces adapted to the inner side of the hollow column 6 are provided at the outer ends of the plurality of abutting blocks 27, and tapered surfaces 28 adapted to the outer side of the frustum 26 are provided at the inner ends of the plurality of abutting blocks 27;

[0041] Rotate the small stud 25. As the small stud 25 rotates, it drives the conical body 26 to move downward through the thread. When the conical body 26 moves downward, relative sliding occurs between its outer side and the tapered surfaces 28 at the inner ends of multiple abutting blocks 27, thereby pushing multiple abutting blocks 27 to move outward synchronously, making the arc surfaces at the outer ends of each abutting block 27 abut against the inner side of the hollow column 6, so that the limit post 24 can be fixed on the inner side surface 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 rotation of the first rotating block 20 and the central rotating shaft 8 can also be restricted by the limit post 24 after being fixed, playing a role in preventing loosening and ensuring that the height of the adjusting disc 13 does not change. The arc surface can be fully attached to the inner side of the hollow column 6, improving the friction between the abutting block 27 and the hollow column 6, thereby enhancing the fixing firmness between the two, and further improving the anti-loosening effect. The tapered surface 28 can make the inner ends of the abutting blocks 27 fully contact with the conical body 26. When the conical body 26 moves downward, it can drive multiple abutting blocks 27 to extend outward synchronously, making the friction between each abutting block 27 and the inner side of the hollow column 6 equal, further improving the anti-loosening effect.

[0042] Further, a plurality of positioning pins 30 arranged in a circular pattern are fixed on the upper side of the adjusting disc 13, and positioning holes 29 are provided at the positions corresponding to each positioning pin 30 inside the cross beam 3;

[0043] Through the positioning function between the positioning pins 30 and the positioning holes 29, relative rotation between the cross beam 3 and the hollow column 6 can be prevented, improving the connection stability between the beam column 1 and the cross beam 3.

[0044] Further, four bottom plate screws 33 are penetrated and arranged at the four corner positions of the bottom plate 5. The lower ends of the four bottom plate screws 33 are fixedly inserted into the inside of the bracket 2, and the upper ends of the four bottom plate screws 33 are rotatably connected with bottom plate nuts 34 through threads;

[0045] The bottom plate 5 is fixed on the upper side of the bracket 2 through the four bottom plate nuts 34, thereby fixing the overall adjustable connection mechanism and improving the connection stability between the beam column 1 and the cross beam 3.

[0046] Further, a second external thread 23 is provided at the upper end of the outer side 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;

[0047] After adjusting the height, rotate and install the fixing nut 32 at the position of the second external thread 23 at the upper end of the hollow column 6, and press the cross beam 3 against the upper side of the bottom plate 5 through the fixing nut 32, thereby quickly connecting and fixing the cross beam 3 and the beam column 1.

[0048] Working principle: When connecting the cross beam 3 and the bracket 2, first fix the base plate 5 on the upper side of the bracket 2 through four base plate nuts 34, and then place the cross beam 3 on the upper side of the adjusting disc 13. During the placement process, position the cross beam 3 through a plurality of positioning pins 30 and a plurality of positioning holes 29, so as to facilitate the more accurate insertion of the hollow column 6 into the fixing hole 4 at one end of the cross beam 3;

[0049] After the cross beam 3 is placed on the upper side of the bracket 2, it is necessary to adjust the height of the end of the cross beam 3 connected to the bracket 2. Rotate the first rotating block 20 with a wrench, and the first rotating block 20 drives the central rotating shaft 8 to rotate. Since the lower end of the outer side of the central rotating shaft 8 is rotationally connected with a threaded slider 10 through a first external thread 9, when the central rotating shaft 8 rotates, the threaded slider 10 is driven to move up and down through the first external thread 9. When the threaded slider 10 moves downward, the threaded slider 10 drives a plurality of connecting rods 11 at its lower end to rotate at a horizontal angle, so that each connecting rod 11 can push the corresponding first slider 12 to move around. An inclined surface 16 is provided on the upper side of each first slider 12, and an inclined surface 15 that is slidably matched with the inclined surface 16 is provided on the lower side of each second slider 14. Therefore, when a plurality of first sliders 12 move around, a vertical thrust can be applied to a plurality of second sliders 14 through the sliding fit between the inclined surface 16 and the inclined surface 15, so as to push the adjusting disc 13 to move upward along the outer side of the hollow column 6, and further the height of one end of the cross beam 3 can be raised. On the contrary, when the threaded slider 10 moves upward, the threaded slider 10 drives a plurality of connecting rods 11 to rotate in the vertical direction, and at this time drives a plurality of first sliders 12 to move toward the center direction, so that a plurality of second sliders 14 move downward, so that the adjusting disc 13 moves downward, and further the height of one end of the cross beam 3 can be lowered. Thus, the height of one end of the cross beam 3 can be adjusted by adjusting the forward and reverse rotation of the central rotating shaft 8. During the assembly of 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 after the foundation of the beam-column 1 settles, the height of the adjusting disc 13 can be finely adjusted, so that the height of the cross beam 3 can be slightly adjusted, improving the assembly accuracy of the PC components;

[0050] After adjusting the completion height, rotate and install the fixing nut 32 at the position of the upper end of the hollow column 6 where the second external thread 23 is located. Press the cross beam 3 against the upper side of the bottom plate 5 through the fixing nut 32, so as to quickly connect and fix the cross beam 3 and the beam-column 1. After the fixing is completed, insert the limiting column 24 of the anti-loosening mechanism into the inner side of the hollow column 6, and at the same time insert the hexagonal column 35 therein into the inner side of the first hexagonal groove 21. When the lower end of the hexagonal column 35 abuts against the inner bottom end of the first hexagonal groove 21, then rotate the small stud 25. The rotation of the small stud 25 drives the conical body 26 to move downward through the thread. When the conical body 26 moves downward, relative sliding occurs between its outer side and the conical surfaces 28 at the inner ends of the plurality of abutting blocks 27, so as to push the plurality of abutting blocks 27 to move outward synchronously, and the arc surfaces at the outer ends of each abutting block 27 are abutted against the inner side of the hollow column 6, so as to fix the limiting column 24 on the inner side surface 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 rotation of the first rotating block 20 and the central rotating shaft 8 can also be restricted by the hexagonal column 35 after the limiting column 24 is fixed. When the beam-column 1, the bracket 2, and the cross beam 3 are subjected to vibration for a long time, it will drive the adjusting disc 13 and the plurality of second sliders 14 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 towards the central position, so as to drive the central rotating shaft 8 to generate a reverse rotation tendency through the threaded slider 10. The central rotating shaft 8 transmits the torque to the hexagonal column 35 through the first rotating block 20. Since the hexagonal column 35 and the limiting 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, improving the use reliability of the connection device, ensuring the use durability of the prefabricated building and the accuracy of the connection position;

[0051] The moving directions of the plurality of first sliders 12 are respectively guided through the plurality of slider guide grooves 19, so that each first slider 12 moves along a straight line. At the same time, through the sliding connection and cooperation between the limiting strips 18 on the upper sides of each lower inclined surface 16 and the limiting grooves 17 on the surfaces of each upper inclined surface 15, the mutually contacting first sliders 12 and second sliders 14 are limited to prevent the two from being misaligned, ensuring that the first sliders 12 and the second sliders 14 uniformly apply an upward thrust to the lower side of the adjusting disc 13, so as to ensure that the adjusting disc 13 moves up and down at a horizontal angle, further improving the adjustment accuracy of the height of the cross beam 3.

[0052] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those 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. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded 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) being fixed at a central position on the upper side of the bottom plate (5), a central rotating shaft (8) being rotatably connected to the inner side of the hollow column (6), a threaded slider (10) being rotatably connected to the outer lower end of the central rotating shaft (8) through a first external thread (9), and a first rotating block (20) being fixed to the upper end of the central rotating shaft (8), a first hexagonal groove (21) being provided at the upper end of the first rotating block (20), a plurality of connecting rods (11) being rotatably connected to the lower end of the threaded slider (10), one end of each of the connecting rods (11) being rotatably connected to the first slider (12), an adjusting disk (13) being slidably arranged on the outer side of the hollow column (6), a plurality of second sliders (14) being slidably connected to the first slider (12) being fixed to the lower surface of the adjusting disk (13), and an anti-loosening mechanism being arranged 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 with 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) adapted to 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); 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) which is slidably matched with the lower inclined surface (16).

2. 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.

3. 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).

4. 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.

5. 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 adapted to 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) adapted to the outer side of the truncated cone (26).

6. The PC beam-column node connection device according to claim 1, characterized in that: 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).

7. 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.

8. The PC beam-column node connection device according to claim 1, characterized in that: The outer upper 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).

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