Steel bar bending device for constructional engineering

Abstract

The invention relates to the technical field of reinforcing steel bar bending, in particular to a reinforcing steel bar bending device for constructional engineering, which comprises a mounting frame, four groups of suckers are fixedly connected to the bottom of the mounting frame, a plurality of matching blocks are arranged above the mounting frame, and two groups of bending columns are rotatably connected to the upper ends of each group of matching blocks through rotating shafts. A fixing mechanism capable of fixing the matching blocks is fixedly mounted between every two sets of matching blocks, the upper end of the mounting frame is rotationally connected with reset elastic telescopic rods, and the ends, away from the mounting frame, of the reset elastic telescopic rods are fixedly connected with the corresponding sets of matching blocks. The output end of the reset elastic telescopic rod is further fixedly connected with two sets of first pull ropes, the outer wall of the mounting frame is further fixedly connected with two sets of driving motors, the output ends of the driving motors are fixedly connected with recycling wheels, and each set of first pull ropes are fixedly wound on the outer wall of the corresponding recycling wheel, so that the reinforcing steel bars can be bent twice at the same time; simplicity and convenience are realized.

Description

Technical Field

[0001] The invention relates to the technical field of steel bar bending, in particular to a steel bar bending device for construction engineering. Background Art

[0002] Rebar refers to steel used for reinforced concrete and prestressed reinforced concrete. Its cross section is generally circular. In construction projects, rebar is an indispensable and widely used material.

[0003] Because during the process of bending the steel bars, the traditional bending device only bends the steel bars at one place, and the same operation needs to be performed when bending the next place. The bending efficiency is low, and the steel bars cannot be bent twice at the same time. It has limitations, and can only be bent one by one, resulting in low production efficiency.

[0004] Chinese patent (Announcement No. CN113878063A), the patented technology discloses a steel bar bending device for construction engineering, including: a processing table; a limiter, the limiter is connected to the processing table, a rotating part is arranged inside the limiter, and the rotating part loads or unloads materials by rotating to cooperate with the limiter; a limiter assembly, the limiter assembly is connected to the processing table, the limiter assembly adjusts the steel bar bending point by rotation, and loosens or fixes the steel bar by lifting, a bending assembly, the bending assembly is connected to the processing table, used for positioning and bending the steel bar, the steel bar bending length and the bending angle are input through the control panel, the driving member drives the rotating member to rotate, the steel bar falls into the trough through the feed port on the hollow tube during the rotation of the turntable, and the processed steel bar in the trough falls through the drop port, the limiter assembly drives the steel bar to move to a predetermined position and fixes the steel bar, the bending assembly bends the steel bar to a preset angle, and has the advantages of low work intensity, high efficiency and high precision.

[0005] According to the above scheme, since the steel bars are simply bent one by one during bending, they can only be bent at one place at a time and cannot be bent at two places at the same time, which has limitations. In order to solve the problem of being unable to bend multiple groups of steel bars at the same time and unable to bend at two places at the same time, we have proposed a steel bar bending device for construction engineering. Summary of the invention

[0006] The object of the present invention is to provide a steel bar bending device for construction engineering to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A steel bar bending device for construction engineering, comprising a mounting frame, four groups of suction cups are fixedly connected to the bottom of the mounting frame, a plurality of matching blocks are arranged above the mounting frame, the upper end of each group of matching blocks is rotatably connected to two groups of bending columns through a rotating shaft, the outer wall of each group of matching blocks is respectively fixedly connected to a first rotating piece and a second rotating piece, the first rotating piece between each two groups of matching blocks is rotatably connected to the second rotating piece, and an angle adjustment mechanism is fixedly installed between each two groups of the first rotating piece and the second rotating piece;

[0009] The angle adjustment mechanism can adjust the rotation angle between the two groups of matching blocks. The bottom of the first rotating piece is fixedly connected to a limiting mechanism that can limit the matching blocks. A fixing mechanism that can fix the matching blocks is fixedly installed between each two groups of matching blocks. A reset elastic telescopic rod is rotatably connected to the upper end of the mounting frame, and the end of the reset elastic telescopic rod away from the mounting frame is fixedly connected to a corresponding group of matching blocks. Two groups of first pull ropes are also fixedly connected to the output end of the reset elastic telescopic rod. Two groups of drive motors are also fixedly connected to the outer wall of the mounting frame, and the output end of the drive motor is fixedly connected to a recovery wheel, and each group of the first pull ropes is fixedly wound around the outer wall of the corresponding recovery wheel.

[0010] As a further feature of the present invention, the angle adjustment mechanism includes a fixed disc, the fixed disc is fixedly connected to the upper end of the second rotating disc, and a plurality of first moving rods are slidably connected inside the fixed disc.

[0011] As a further feature of the present invention, a magnetic rod is fixedly connected to the bottom of each group of the first movable rods, the upper end of the magnetic rod is in contact with the fixed disc, and a plurality of first matching openings are provided inside the second rotating piece.

[0012] As a further embodiment of the present invention, the limiting mechanism includes a first connecting tube, the first connecting tube is fixedly connected to the bottom of the first rotating piece, the bottom of the first connecting tube is fixedly connected to a second connecting tube, the second connecting tube is slidably connected to a movable column inside the first connecting tube, the bottom end of the inner wall of the second connecting tube is fixedly connected to a return spring, and the end of the return spring away from the second connecting tube is fixedly connected to the movable column.

[0013] As a further feature of the present invention, a plurality of groups of cooperating telescopic arms are fixedly connected to the outer wall of the first connecting tube, and a plurality of bending sleeves are arranged on the outer side of the first connecting tube, and each group of cooperating telescopic arms is fixedly connected to the outer wall of the corresponding bending sleeve, and each group of the bending sleeves is slidably connected inside with two groups of bending blocks with a reset function, and the bending blocks and the upper ends of the bending blocks are fixedly connected with limiting blocks, and each group of the bending sleeves is fixedly connected to the movable column by a third pull rope.

[0014] As a further feature of the present invention, a limiting arm is fixedly connected to the bottom of the movable column, a second matching opening is provided on the outer wall of the first connecting tube, and a second limiting groove and a first limiting groove are provided on the inner wall of the second matching opening, a pulling rod is fixedly connected to the outer wall of the movable column, the outer wall of the pulling rod abuts against the inner wall of the second limiting groove, and a limiting block is slidably connected to the upper end of the mounting frame.

[0015] As a further embodiment of the present invention, the fixing mechanism comprises a moving block, and the moving block is slidably connected to the bottom of the matching block, a limiting strip is fixedly connected between the moving block and the matching block, and two groups of insert strips are fixedly connected to the outer wall of the moving block.

[0016] As a further feature of the present invention, two groups of limiting tubes are fixedly connected to the bottom of the matching block, and the outer wall of each group of the inserts is slidably connected to the inner wall of the corresponding limiting tube, and the moving block is fixedly connected to the moving column by a second pull rope.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When the present invention is used, the two groups of bending columns are high, and multiple groups of steel bars can be limited and fixed. Moreover, when the steel bars are bent, the force is evenly distributed, which improves work efficiency and is simple and quick.

[0019] 2. When the present invention is used, a group of driving motors in the same direction as the bending direction of the steel bar is started, the driving motors will drive the recovery wheel to rotate, the recovery wheel will pull the output end of the reset elastic telescopic rod through the first pull rope, the output end of the reset elastic telescopic rod will also drive the corresponding matching block to move, at this time, multiple groups of matching blocks will drive the steel bar to bend through the bending column, the steel bar can be bent into a "U" shape, can also be bent into an "L" shape, the steel bar can be bent in two places, which is quick and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a front view of a steel bar bending device for construction engineering.

[0021] Figure 2 The present invention is a schematic diagram of the position structure of a bending column in a steel bar bending device used in construction engineering.

[0022] Figure 3 The present invention is a schematic diagram of the position structure of the first movable rod in a steel bar bending device for construction engineering.

[0023] Figure 4 The present invention is a structural schematic diagram of an angle adjustment mechanism in a steel bar bending device used in construction engineering.

[0024] Figure 5 The present invention is a schematic diagram of the position structure of the second connecting pipe in a steel bar bending device for construction engineering.

[0025] Figure 6 The present invention is a schematic diagram of the internal structure of a bending sleeve in a steel bar bending device used in construction engineering.

[0026] Figure 7 The present invention is a structural schematic diagram of a limiting mechanism in a steel bar bending device for construction engineering.

[0027] Figure 8 The present invention is a schematic diagram of the internal structure of a second connecting pipe in a steel bar bending device for construction engineering.

[0028] Fig. 9 The present invention is a schematic diagram of the position structure of a limit arm in a steel bar bending device used in construction engineering.

[0029] Fig.10 The present invention is a schematic diagram of the structure of a matching block in a steel bar bending device used in construction engineering.

[0030] In the figure: 1, mounting frame; 2, suction cup; 4, first pull rope; 5, driving motor; 6, weight reduction hole; 7, recovery wheel; 8, matching block; 9, bending column; 10, first moving rod; 11, first rotating piece; 12, first matching opening; 13, second rotating piece; 14, fixed disc;

[0031] 15. Magnetic rod; 16. Limiting strip; 17. Moving block; 18. Inserting strip; 19. Limiting tube; 20. First connecting tube; 21. Second pulling rope; 22. Matching telescopic arm; 23. Second connecting tube; 24. Moving column; 25. Limiting arm; 26. Third pulling rope; 27. Bending block;

[0032] 28. Bending arc sleeve; 29. ​​Limiting block; 30. Pull rod; 31. Connecting spring; 32. First limiting groove; 33. Second limiting groove; 34. Second matching opening; 35. Circular ring block; 36. Rectangular groove; 37. Limiting block; 38. Reset spring; 39. Reset elastic telescopic rod; 101. Limiting mechanism; 201. Angle adjustment mechanism; 301. Fixing mechanism. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figure 1 , 2, 3, 4, in the embodiment of the present invention, a steel bar bending device for construction engineering includes a mounting frame 1, four groups of suction cups 2 are fixedly connected to the bottom of the mounting frame 1, and the suction cups 2 are made of rubber, and the mounting frame 1 can be limited and fixed by simply adsorbing the suction cups 2 on the ground, and a plurality of matching blocks 8 are arranged above the mounting frame 1, and the matching blocks 8 are distributed in an array above the mounting frame 1, and the upper ends of each group of matching blocks 8 are rotatably connected to two groups of bending columns 9 through a rotating shaft, and the outer walls of each group of matching blocks 8 are respectively fixedly connected to a first rotating piece 11 and a second rotating piece 13, and the first rotating piece 11 and the second rotating piece 13 are symmetrically distributed on the outer walls of the matching blocks 8, and the first rotating piece 11 and the second rotating piece 13 between every two groups of matching blocks 8 are rotatably connected through a rotating shaft, and an angle adjustment mechanism 201 is fixedly installed between every two groups of first rotating pieces 11 and second rotating pieces 13. Specifically, the angle adjustment mechanism 201 can be The rotation angle between the two groups of matching blocks 8, the bottom of the first rotating piece 11 is fixedly connected with a limiting mechanism 101 that can limit the matching block 8, and a fixing mechanism 301 that can fix the matching block 8 is fixedly installed between every two groups of matching blocks 8. The upper end of the mounting frame 1 is rotatably connected with a reset elastic telescopic rod 39, and the end of the reset elastic telescopic rod 39 away from the mounting frame 1 is fixedly connected to a corresponding group of matching blocks 8, and the output ends of the reset elastic telescopic rod 39 are fixedly connected with two groups of first pull ropes 4, and the two groups of first pull ropes 4 are symmetrically distributed on the output ends of the reset elastic telescopic rod 39. The outer wall of the mounting frame 1 is also fixedly connected with two groups of driving motors 5, and the output end of the driving motor 5 is fixedly connected with a recovery wheel 7, and a plurality of weight reduction holes 6 are opened on the outer wall of the recovery wheel 7, and the weight reduction holes 6 are circumferentially distributed on the outer wall of the recovery wheel 7, and the free ends of each group of first pull ropes 4 are fixedly wound on the corresponding outer wall of the recovery wheel 7;

[0035] Example 2: Please refer to Figure 5 , 6, 7, 8, the angle adjustment mechanism 201 includes a fixed disc 14, the fixed disc 14 is made of metal, the fixed disc 14 is fixedly connected to the upper end of the second rotating piece 13, and a plurality of first moving rods 10 are slidably connected inside the fixed disc 14. Specifically, a plurality of sliding openings are opened inside the first matching opening 12, and the outer wall of each group of first moving rods 10 is slidably connected to the corresponding inner wall of the sliding opening. The inner wall of each group of sliding openings and the outer wall of the first moving rod 10 are coated with lubricating oil. When the first matching opening 12 is pushed, the sliding opening can limit the first matching opening 12 and can also guide the first matching opening 12, thereby improving the stability of the first matching opening 12 when moving. The lubricating oil can also reduce the friction between the sliding opening and the first matching opening 12, thereby improving the service life of the first matching opening 12 and the sliding opening, and a magnetic suction rod 15 is fixedly connected to the bottom of each group of first moving rods 10, and the upper end of the magnetic suction rod 15 abuts against the fixed disc 14, and the magnetic suction rod 15 adopts a strong The second rotating piece 13 is provided with a plurality of first matching openings 12, and each group of magnetic suction rods 15 is located directly above the corresponding first matching openings 12. Specifically, since the magnetic suction rods 15 are made of strong magnets and the fixed circular piece 14 is made of metal, when the first moving rod 10 is pushed downward, the magnetic suction rods 15 will be driven to break away from the contact with the fixed circular piece 14. At this time, the magnetic suction rods 15 will break away from the contact with the fixed circular piece 14, and the magnetic suction rods 15 will slide in the inner wall of the corresponding first matching opening 12. Due to gravity, the magnetic suction rods 15 will remain in the inner wall of the first matching opening 12. It is only necessary to push the corresponding two magnetic suction rods 15, and the distance between the two magnetic suction rods 15 can limit the limit bar 16, so that when the matching block 8 drives the limit bar 16 to rotate through the second rotating piece 13, the two magnetic suction rods 15 will limit the limit bar 16, so as to limit the rotation range of the matching block 8.

[0036] See also Figure 5 , 6, 8, 9, the limiting mechanism 101 includes a first connecting tube 20, the first connecting tube 20 is fixedly connected to the bottom of the first rotating piece 11, the bottom of the first connecting tube 20 is fixedly connected to the second connecting tube 23, the second connecting tube 23 is slidably connected to the inside of the first connecting tube 20 with a moving column 24, the bottom end of the inner wall of the second connecting tube 23 is fixedly connected to a return spring 38, and the end of the return spring 38 away from the second connecting tube 23 is fixedly connected to the moving column 24, the outer wall of the first connecting tube 20 is also fixedly connected to a plurality of groups of matching telescopic arms 22, and the plurality of matching telescopic arms 22 are distributed in a circle on the outer wall of the moving column 24, and a plurality of curved sleeves 28 are arranged on the outer side of the first connecting tube 20, and each group of matching telescopic arms 22 is fixedly connected to the outer wall of the corresponding curved sleeve 28, and each group of curved sleeves 28 is slidably connected inside Two groups of arc blocks 27 with reset function, specifically, each group of arc blocks 27 and the inner wall of the arc sleeve 28 are fixedly connected with a connecting spring 31, and the connecting spring 31 can drive the corresponding arc block 27 to quickly reset, and multiple groups of arc blocks 27 and the arc sleeve 28 are connected to each other in a circular ring shape, and the arc blocks 27 and the upper ends of the arc blocks 27 are fixedly connected with the limiting blocks 29, and the limiting blocks 29 are adapted to the first pull rope 4, and each group of arc sleeves 28 are fixedly connected with the third pull rope 26 between the moving column 24, and the outer wall of the second connecting tube 23 is fixedly connected with a circular ring block 35, and the outer wall of the circular ring block 35 and the outer wall of the third pull rope 26 abut against each other, and the arc of the outer wall of the circular ring block 35 can effectively reduce the friction between the third pull rope 26 and the second connecting tube 23, and the bottom of the moving column 24 is fixedly connected with the limiting arm 25;

[0037] See also Figure 7 , 8 9. A second matching opening 34 is provided on the outer wall of the first connecting tube 20, and a second limiting groove 33 and a first limiting groove 32 are provided on the inner wall of the second matching opening 34. The second limiting groove 33, the second matching opening 34 and the first limiting groove 32 are connected to each other. The length of the first limiting groove 32 is shorter than that of the second limiting groove 33. A pulling rod 30 is fixedly connected to the outer wall of the movable column 24. The outer wall of the pulling rod 30 abuts against the inner wall of the second limiting groove 33. The upper end of the mounting frame 1 is slidably connected to a limiting block 37. Specifically, a rectangular groove 36 is provided on the upper end of the mounting frame 1. The functions of the rectangular groove 36 and the limiting block 37 are the same as those of the sliding opening and the first movable rod 10. Excessive details are not given here. A clamping tooth is fixedly connected to the upper end of the limiting arm 25. A rubber pad is provided on the inner wall of the limiting block 37. The clamping tooth can make the limiting arm 25 better clamped in the inner wall of the limiting block 37.

[0038] Specifically, when the pull rod 30 moves along the inner wall of the second limiting groove 33, the pull rod 30 moves downward along the inner wall of the pull rod 30, and the pull rod 30 drives the moving column 24 to move downward. When the moving column 24 moves downward, the moving column 24 will gradually relax the tension of the third pull rope 26. At this time, the connecting spring 31 in the inner wall of the bending sleeve 28 will drive the bending block 27 to quickly reset. At this time, all the bending blocks 27 and the bending sleeve 28 will be in an expanded state, driving the corresponding limiting blocks 29 to move successively. When the pulling rod 30 moves along the inner wall of the second matching opening 34, the pulling rod 30 will drive the moving column 24 to rotate. When the moving column 24 rotates, it will drive the limiting arm 25 to rotate. When the second matching opening 34 moves to the inner wall of the first limiting groove 32, the reset spring 38 will drive the moving column 24 to reset. The moving column 24 drives the pulling rod 30 to move toward the inner wall of the first limiting groove 32. At this time, the limiting block 37 is moved to the side of the limiting arm 25, so that the limiting arm 25 is clamped in the inner wall of the limiting block 37.

[0039] See also Fig.10 The fixing mechanism 301 includes a moving block 17, and the moving block 17 is slidably connected to the bottom of the matching block 8. A limiting strip 16 is fixedly connected between the moving block 17 and the matching block 8. Two groups of insert strips 18 are fixedly connected to the outer wall of the moving block 17, and the two groups of insert strips 18 are symmetrically distributed front and back on the outer wall of the moving block 17. Two groups of limiting tubes 19 are also fixedly connected to the bottom of the matching block 8, and the outer wall of each group of insert strips 18 is slidably connected to the inner wall of the corresponding limiting tube 19. The moving block 17 is fixedly connected to the moving column 24 through the second pull rope 21. The second pull rope 21 and the third pull rope 26 are made of nylon, and the nylon material has a large strength, can withstand a large tensile force, is not easy to break, and has good wear resistance. It has a long service life and is durable in a friction environment.

[0040] The working principle of the present invention is: the steel bars to be bent are placed between the two groups of bending columns 9. Since the two groups of bending columns 9 are high, multiple groups of steel bars can be limited and fixed. Since there is a bending point when the steel bars are bent, and the bending point is at an angle, at this time, it is only necessary to push the first moving rod 10 to drive the magnetic suction rod 15 to break away from the abutment with the fixed disc 14. At this time, the magnetic suction rod 15 will break away from the abutment and adsorption with the fixed disc 14, and the magnetic suction rod 15 will slide in the corresponding inner wall of the first matching opening 12. Due to gravity, the magnetic suction rod 15 will remain in the inner wall of the first matching opening 12. It is only necessary to push the corresponding two magnetic suction rods 15, and the distance between the two magnetic suction rods 15 can limit the limiting strip 16, so that when the matching block 8 drives the limiting strip 16 to rotate through the second rotating piece 13, the two magnetic suction rods 15 will limit the limiting strip 16, so that the rotation range of the matching block 8 is limited, and the bending part of the steel bar can be limited and fixed at this time;

[0041] At the same time, when the pulling rod 30 moves along the inner wall of the second limiting groove 33, the pulling rod 30 moves downward along the inner wall of the pulling rod 30, and the pulling rod 30 drives the moving column 24 to move downward. When the moving column 24 moves downward, the moving column 24 will gradually relax the tension of the third pull rope 26. At this time, the connecting spring 31 in the inner wall of the bending sleeve 28 will drive the bending block 27 to quickly reset. At this time, all the bending blocks 27 and the bending sleeve 28 will be in an expanded state, driving the corresponding limiting blocks 29 to move successively, and when the pulling rod 30 moves along the inner wall of the second matching opening 34, the pulling rod 30 will drive the moving column 24 to rotate. When the moving column 2 When the second matching opening 34 is rotated, the limiting arm 25 is driven to rotate. When the second matching opening 34 moves to the inner wall of the first limiting groove 32, the reset spring 38 drives the moving column 24 to reset, and the moving column 24 drives the pulling rod 30 to move to the inner wall of the first limiting groove 32. At this time, the limiting block 37 is moved to the side of the limiting arm 25, so that the limiting arm 25 is clamped in the inner wall of the limiting block 37. Because the first bending part of the steel bar needs to be fixed, it is only necessary to fix the first bending part through the limiting block 37. When the steel bar needs to be bent at other places, it is only necessary to follow the above steps, except that the limiting arm 25 does not need to be clamped and fixed with the limiting block 37.

[0042] Since the moving block 17 is also driven to move by the second pull rope 21 during the downward movement of the moving column 24, the moving block 17 drives the insert 18 to leave the corresponding limiting tube 19. It is worth noting that when all the bending blocks 27 and the bending sleeves 28 spread to the surroundings, the steel bar needs to be bent at this time. It only needs to start a group of driving motors 5 in the same direction as the bending direction of the steel bar. The driving motor 5 will drive the recovery wheel 7 to rotate, and the recovery wheel 7 will pull the output end of the reset elastic telescopic rod 39 through the first pull rope 4. The output end of the reset elastic telescopic rod 39 will also drive the corresponding matching block 8 to move. At this time, multiple groups of matching blocks 8 will drive the steel bar to bend through the bending column 9, which can bend the steel bar into a "U" shape or an "L" shape. Through two groups of driving motors 5 and the weight reduction hole 6, bending in two directions can be performed, which is simple and convenient. In the process of bending the steel bar, the limiting block 29 can limit the first pull rope 4 to prevent the first pull rope 4 from being knotted and entangled on the outer wall of the machine.

[0043] When the matching block 8 needs to be reset, it is only necessary to reset the pulling rod 30, and the pulling rod 30 will drive the moving column 24 to reset, and the moving column 24 will pull the third pull rope 26. At this time, all the bending blocks 27 will shrink into the bending sleeve 28, and the limiting arm 25 will be disengaged from the clamping connection with the limiting block 37, and the rotating matching blocks 8 also need to be manually reset, so that when the limiting strip 16 drives the moving block 17 to reset, the insert strip 18 can be accurately inserted into the inner wall of the limiting tube 19 to complete the reset.

[0044] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A steel bar bending device for construction engineering, comprising a mounting frame (1), characterized in that: Four groups of suction cups (2) are fixedly connected to the bottom of the mounting frame (1); a plurality of matching blocks (8) are arranged above the mounting frame (1); the upper end of each group of matching blocks (8) is rotatably connected to two groups of bending columns (9) via a rotating shaft; the outer wall of each group of matching blocks (8) is respectively fixedly connected to a first rotating piece (11) and a second rotating piece (13); the first rotating piece (11) and the second rotating piece (13) between every two groups of matching blocks (8) are rotatably connected; and an angle adjustment mechanism (201) is fixedly installed between every two groups of the first rotating piece (11) and the second rotating piece (13); The angle adjustment mechanism (201) can adjust the rotation angle between the two groups of matching blocks (8); the bottom of the first rotating piece (11) is fixedly connected to a limiting mechanism (101) capable of limiting the matching blocks (8); a fixing mechanism (301) capable of fixing the matching blocks (8) is fixedly installed between each two groups of matching blocks (8); the upper end of the mounting frame (1) is rotatably connected to a reset elastic telescopic rod (39), and the end of the reset elastic telescopic rod (39) away from the mounting frame (1) is fixedly connected to a corresponding group of matching blocks (8); the output end of the reset elastic telescopic rod (39) is also fixedly connected to two groups of first pull ropes (4); the outer wall of the mounting frame (1) is also fixedly connected to two groups of drive motors (5), and the output end of the drive motor (5) is fixedly connected to a recovery wheel (7), and each group of the first pull ropes (4) is fixedly wound around the outer wall of the corresponding recovery wheel (7).

2. A steel bar bending device for construction engineering according to claim 1, characterized in that: The angle adjustment mechanism (201) comprises a fixed disc (14), wherein the fixed disc (14) is fixedly connected to the upper end of the second rotating disc (13), and a plurality of first moving rods (10) are slidably connected inside the fixed disc (14).

3. A steel bar bending device for construction engineering according to claim 2, characterized in that: A magnetic rod (15) is fixedly connected to the bottom of each group of the first moving rods (10), the upper end of the magnetic rod (15) is in contact with the fixed circular plate (14), and a plurality of first matching openings (12) are provided inside the second rotating plate (13).

4. A steel bar bending device for construction engineering according to claim 1, characterized in that: The limiting mechanism (101) comprises a first connecting tube (20), the first connecting tube (20) being fixedly connected to the bottom of the first rotating plate (11), the bottom of the first connecting tube (20) being fixedly connected to a second connecting tube (23), the second connecting tube (23) being slidably connected to a moving column (24) inside the first connecting tube (20), a return spring (38) being fixedly connected to the bottom end of the inner wall of the second connecting tube (23), and one end of the return spring (38) away from the second connecting tube (23) being fixedly connected to the moving column (24).

5. A steel bar bending device for construction engineering according to claim 4, characterized in that: The outer wall of the first connecting tube (20) is also fixedly connected to a plurality of groups of cooperating telescopic arms (22), and a plurality of bending sleeves (28) are arranged on the outer side of the first connecting tube (20), and each group of cooperating telescopic arms (22) is fixedly connected to the outer wall of the corresponding bending sleeve (28), and each group of the bending sleeves (28) is slidably connected inside with two groups of bending blocks (27) with a reset function, and the bending blocks (27) and the upper ends of the bending blocks (27) are fixedly connected to limit blocks (29), and each group of the bending sleeves (28) is fixedly connected to the movable column (24) by a third pull rope (26).

6. A steel bar bending device for construction engineering according to claim 5, characterized in that: The bottom of the movable column (24) is fixedly connected to a limiting arm (25); the outer wall of the first connecting tube (20) is provided with a second matching opening (34); the inner wall of the second matching opening (34) is provided with a second limiting groove (33) and a first limiting groove (32); the outer wall of the movable column (24) is fixedly connected to a pulling rod (30); the outer wall of the pulling rod (30) abuts against the inner wall of the second limiting groove (33); and the upper end of the mounting frame (1) is slidably connected to a limiting block (37).

7. A steel bar bending device for construction engineering according to claim 1, characterized in that: The fixing mechanism (301) comprises a moving block (17), and the moving block (17) is slidably connected to the bottom of the matching block (8), a limiting strip (16) is fixedly connected between the moving block (17) and the matching block (8), and two groups of insert strips (18) are fixedly connected to the outer wall of the moving block (17).

8. A steel bar bending device for construction engineering according to claim 7, characterized in that: The bottom of the matching block (8) is also fixedly connected to two groups of limiting tubes (19), and the outer wall of each group of the inserting strips (18) is slidably connected to the inner wall of the corresponding limiting tube (19), and the moving block (17) and the moving column (24) are fixedly connected via a second pull rope (21).

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