Vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beam and using method of vibrating device

Abstract

The invention belongs to the technical field of concrete structure construction devices, and provides a vibrating device for orderly layered distribution of coarse aggregates in a recycled concrete beam and a use method of the vibrating device aiming at the problem that an existing vibrating device cannot control the distribution of the coarse aggregates in the recycled concrete beam. Comprising a supporting mechanism, a lifting vibrating mechanism, a screening mechanism and a transmission mechanism, the lifting vibrating mechanism is movably connected to the interior of a supporting assembly and used for vibrating coarse aggregate in the recycled concrete beam from bottom to top, and the screening mechanism is arranged below the lifting vibrating mechanism; the screening mechanism is connected with the lifting vibrating mechanism through a plurality of hollow connecting rods, the transmission mechanism is connected between the lifting vibrating mechanism and the screening mechanism, and the transmission mechanism penetrates through one of the hollow connecting rods and extends to be connected with the supporting mechanism. The coarse aggregate in the recycled concrete beam can be layered in order according to the particle size, the ductility and compressive strength of the recycled concrete beam are improved, and the applicability of engineering application is widened.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete structure construction devices, and in particular to a vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams and a use method thereof. Background Art

[0002] Recycled concrete is made by crushing, cleaning, and sorting construction waste, using it as recycled coarse aggregate to create new concrete. Using recycled concrete in construction projects not only recycles construction waste, but also reduces the need for natural sand and gravel mining, promoting the sustainable development of infrastructure.

[0003] Coarse aggregate accounts for more than 40% of the weight of concrete. Studies have shown that the particle size of recycled coarse aggregate has a significant impact on the performance of newly prepared concrete. When the particle size of recycled coarse aggregate increases, the compressive strength of recycled concrete tends to increase, the tensile strength remains almost unchanged, but the peak strain decreases. When the particle size of recycled coarse aggregate decreases, the ductility of recycled concrete tends to increase. The recycled concrete contains continuously graded recycled coarse aggregate with a particle size of 4.75mm to 31.5mm, and the particle size difference is large, which is one of the reasons for the large variability in the performance of recycled concrete.

[0004] If the distribution of recycled coarse aggregate in concrete structures can be controlled, coarse aggregate with larger particle size can be concentrated in the compressive area of the structure, and coarse aggregate with smaller particle size can be concentrated in the tensile area of the structure. For example, in the most common concrete beams that bear bending loads, the top of the beam bears greater compressive stress and is prone to crushing and damage, while the bottom of the beam mainly bears tensile stress and is prone to tensile cracking. Reasonable distribution of recycled coarse aggregate can improve the overall working performance of recycled concrete structures.

[0005] However, existing vibrating devices primarily reduce bubbles in cement mortar and are unable to control the distribution of coarse aggregate in recycled concrete. Therefore, developing a vibrating device that can achieve an orderly, layered distribution of coarse aggregate in recycled concrete beams is crucial for controlling the distribution of coarse aggregate in recycled concrete structures and improving their overall mechanical properties. Summary of the Invention

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams and a method for using the same.

[0007] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

[0008] The technical solution disclosed in the first aspect of the present invention is: a vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams, comprising:

[0009] Support mechanism,

[0010] The lifting and vibrating mechanism is movably connected to the interior of the supporting assembly and is used to vibrate the coarse aggregate in the recycled concrete beam from bottom to top;

[0011] The screening mechanism is arranged below the lifting and vibrating mechanism, and the screening mechanism and the lifting and vibrating mechanism are connected by a plurality of hollow connecting rods;

[0012] The transmission mechanism is connected between the lifting and vibrating mechanism and the screening mechanism, and the transmission mechanism passes through one of the hollow connecting rods and extends to be connected with the supporting mechanism.

[0013] As a further preferred embodiment of the above technical solution, the support mechanism includes:

[0014] There are two foot supports, which are arranged parallel to each other;

[0015] The rotating plate is movably connected to the upper ends of the two leg brackets;

[0016] The limiting member is connected to one of the foot brackets and extends into the interior of the rotating plate, and the rotating plate and the foot bracket are fixed by the limiting member.

[0017] A further preferred solution is that the lifting and vibrating mechanism includes:

[0018] The base plate is horizontally arranged below the rotating plate, and a plurality of hollow connecting rods are respectively fixedly connected to the bottom of the base plate;

[0019] The lifting threaded rod is vertically mounted on the base plate, and the upper end of the lifting threaded rod passes through the rotating plate, and the lifting threaded rod is rotated by the driver;

[0020] The vibrating rod is installed at the bottom of the foundation plate and vibrates in the coarse aggregate through the vibrator.

[0021] A further preferred solution is that the screening mechanism includes:

[0022] A screening box is located below the foundation plate and is fixedly connected to the bottoms of the plurality of hollow connecting rods;

[0023] The iris opening and closing structures are provided in plurality and are evenly distributed inside the screening box, and the iris opening and closing structures cooperate with the transmission mechanism.

[0024] As a further preferred embodiment, a plurality of feed holes and corresponding discharge holes are respectively provided on the top and bottom of the screening box, the iris opening and closing structure is arranged in one-to-one correspondence with the discharge holes, and a guide cylinder is provided between the iris opening and closing structure and the corresponding feed hole.

[0025] More preferably, multiple iris opening and closing structures are arranged in a square array, a row of iris opening and closing structures close to the transmission mechanism are connected by a synchronous belt 1, and the synchronous belt 1 cooperates with the transmission mechanism, and each row of iris opening and closing structures are connected by a synchronous belt 2.

[0026] A further preferred solution is that each iris opening and closing structure includes:

[0027] A fixed plate, installed inside the screening box;

[0028] The rotating disk is movably arranged above the fixed disk;

[0029] There are multiple arc-shaped metal blades, each of which is movably matched between the fixed disk and the rotating disk through a connecting column;

[0030] Among them, a synchronous wheel 2 matched with a synchronous belt 2 is arranged on the outer periphery of the rotating disk, and a synchronous wheel 1 matched with a synchronous belt 1 is arranged on the top of a row of rotating disks close to the transmission mechanism.

[0031] As a further preferred embodiment of the above scheme, the transmission mechanism includes:

[0032] The transmission rod passes through the rotating plate, the base plate and the screening box in sequence and is built into the hollow connecting rod, and the lower end of the transmission rod is sleeved with a synchronous wheel three that matches the synchronous belt one;

[0033] The synchronous belt three is connected between the transmission rod and the lifting threaded rod, and the transmission rod and the lifting threaded rod are rotated synchronously through the synchronous belt three.

[0034] The technical solution disclosed in the second aspect of the present invention is: a method for using a vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams, characterized by comprising the following steps:

[0035] S1: Adjust the rotating plate so that it drives the lifting vibration mechanism and the screening mechanism to rotate in a horizontal direction, and move the foot bracket to the vibration position of the recycled concrete beam;

[0036] S2: Adjust the lifting and vibrating mechanism to the lowest position and adjust the iris opening and closing structure to the closed state;

[0037] S3: Rotate the rotating plate downward so that the screening mechanism is inserted into the concrete to be vibrated in an arc shape and obliquely downward, and insert the limiter into the foot bracket and connect it to the rotating plate;

[0038] S4: Turn on the driver and vibrator, use the vibrating rod to mix the concrete to be vibrated evenly, and rotate the lifting threaded rod to synchronously move the base plate and the screening box upward. During the rotation of the lifting threaded rod, the transmission rod is driven to rotate by the synchronous belt. When the transmission rod rotates, the arc-shaped metal blades of each iris opening and closing structure rotate around their respective central axes according to a predetermined trajectory. All the arc-shaped metal blades expand synchronously to gradually increase the aperture, so that the coarse aggregate is distributed in layers in an orderly manner according to the particle size from small to large during the vibration process;

[0039] S5: After the screening mechanism moves to the surface of the concrete to be vibrated, steps S1 to S4 are repeated until the vibration of the entire area of the recycled concrete beam is completed.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. By setting up a lifting and vibrating mechanism, the coarse aggregate in the recycled concrete beam can be gradually vibrated from bottom to top. At the same time, in conjunction with the screening mechanism and the transmission mechanism, the coarse aggregate is uniformly vibrated. As the lifting and vibrating mechanism moves upward, the opening diameter of the iris opening and closing structure in the screening mechanism gradually expands, thereby achieving layered distribution of the coarse aggregate from bottom to top according to the particle size, making the distribution of the coarse aggregate in the recycled concrete beam efficient and controllable, thereby achieving the effect of enhancing the compressive strength of the compressed area at the top of the recycled concrete beam and enhancing the ductility of the bottom of the recycled concrete beam. Compared with the recycled concrete beam with randomly distributed coarse aggregate, the recycled concrete beam prepared by using the vibration device and method of the present invention has higher controllability and significantly improves the working performance of the recycled concrete beam.

[0042] 2. By setting up a transmission mechanism, the transmission mechanism connects the lifting and vibrating mechanism with the screening mechanism, ensuring that the three tasks of concrete vibration, upward movement of the screening mechanism, and expansion of the aperture of the iris opening and closing structure are carried out simultaneously. While ensuring uniform concrete vibration, the coarse aggregate is efficiently and orderly stratified.

[0043] 3. By replacing the specifications of the synchronous wheel three on the transmission rod and changing the transmission ratio, the vibrating device of the present invention can be applied to recycled concrete beams with different particle size ranges and different coarse aggregate distribution densities, and has a wider applicability in engineering applications.

[0044] 4. The device of the present invention has a reliable structure and is easy to operate. It provides a new method for processing recycled concrete beams with layered distribution of coarse aggregate particle size, and significantly improves the ductility and crack resistance of the tensile zone at the bottom of the recycled concrete beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required in the embodiments.

[0046] Figure 1This is a schematic diagram of the overall structure of a vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams according to the present invention;

[0047] Figure 2 This is a schematic structural diagram of the vibrating device of the present invention from another angle;

[0048] Figure 3 It is a front view of the vibrating device of the present invention;

[0049] Figure 4 It is an enlarged view of the local structure of the lifting and vibrating mechanism of the present invention;

[0050] Figure 5 A cross-sectional view showing the connection details of the lifting threaded rod, the rotating plate and the base plate of the present invention;

[0051] Figure 6 It is a schematic diagram of the interior of the screening box of the present invention;

[0052] Figure 7 This is an enlarged structural diagram of the iris opening and closing structure of the present invention;

[0053] Figure 8 It is a top cross-sectional view of the screening mechanism of the present invention and a schematic diagram of the opening and closing structure of different rows of irises;

[0054] Figure 9 This is an enlarged view of the structure of the fixed disk, rotating disk and arc-shaped metal blades of the present invention;

[0055] Figure 10 A flow chart of a method for using the vibrating device of the present invention;

[0056] Figure 11 Schematic diagram of stress distribution in the cross section of a recycled concrete beam made using the vibrating device of the present invention under bending load;

[0057] In the figure: 1. Support mechanism; 11. Foot bracket; 111. Second circular hole; 12. Rotating plate; 121. Third circular hole; 122. Cylindrical protrusion; 13. Limiting member; 2. Lifting and vibrating mechanism; 21. Base plate; 22. Lifting threaded rod; 23. Vibrating rod; 24. Driver; 25. Vibrator; 26. Gasket; 27. Synchronous wheel four; 3. Screening mechanism; 31. Screening box; 32. Iris opening and closing structure; 321. Fixed disk; 322. Rotating disk; 323. Arc-shaped metal blade; 33. Guide cylinder; 34. Synchronous belt one; 35. Synchronous belt two; 36. Synchronous wheel one; 37. Synchronous wheel two; 4. Transmission mechanism; 41. Transmission rod; 42. Synchronous belt three; 43. Synchronous wheel three; 5. Hollow connecting rod. DETAILED DESCRIPTION

[0058] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, not all embodiments. For those skilled in the art, other embodiments can be derived without inventive effort.

[0059] In the description of this application, unless otherwise specified and limited, the directional words such as "up", "down", "left", "right", "front", and "back" are only used to indicate relative position relationships. When the absolute position of the described object changes, the corresponding position relationship may change.

[0060] Example 1:

[0061] Reference Figures 1-9 A vibration device for orderly layered distribution of coarse aggregate in recycled concrete beams, comprising a supporting mechanism 1, a lifting and vibrating mechanism 2, a screening mechanism 3 and a transmission mechanism 4. The lifting and vibrating mechanism 2 is movably connected inside the supporting assembly and is used to vibrate the coarse aggregate in the recycled concrete beam from bottom to top. The screening mechanism 3 is arranged below the lifting and vibrating mechanism 2, and the screening mechanism 3 is connected to the lifting and vibrating mechanism 2 by multiple hollow connecting rods 5. The coarse aggregate in the recycled concrete beam is layered and screened according to particle size during the lifting and vibrating process. The transmission mechanism 4 is connected between the lifting and vibrating mechanism 2 and the screening mechanism 3, and the transmission mechanism 4 passes through one of the hollow connecting rods 5 and extends to connect with the supporting mechanism 1, ensuring the coordinated operation of the lifting and vibrating mechanism 2 and the screening mechanism 3, so as to realize the orderly distribution of the coarse aggregate in the recycled concrete beam according to particle size along the height direction.

[0062] like Figure 2 As shown, the support mechanism 1 includes two leg supports 11, a rotating plate 12 and a limiter 13. The two leg supports 11 are arranged parallel to each other, and each leg support 11 is a door-shaped structure. The rotating plate 12 is movably connected to the upper ends of the two leg supports 11. The limiter 13 is connected to one of the leg supports 11 and extends into the interior of the rotating plate 12. The rotating plate 12 and the leg supports 11 are fixed by the limiter 13.

[0063] Specifically, a first circular hole is provided on one side of the two foot brackets 11 close to each other, and a cylindrical protrusion 122 is provided on both sides of the rotating plate 12. The cylindrical protrusion 122 is inserted into the corresponding first circular hole, allowing the rotating plate 12 to rotate around the axis of the first circular hole, so that the screening mechanism 3 is inserted obliquely downward into the concrete to be vibrated to avoid pressing the coarse aggregate at the bottom; a second circular hole 111 and a third circular hole 121 are respectively provided on one side of the foot bracket 11 and the rotating plate 12 along the width direction, and the limit member 13 is inserted into the second circular hole 111 and the third circular hole 121 in turn. The limit member 13 in this embodiment adopts a U-shaped bolt, which is connected to the third circular hole 121 after passing through the second circular hole 111 to achieve the fixation of the rotating plate 12 and the foot bracket 11.

[0064] like Figure 2-Figure 5 As shown, the lifting and vibrating mechanism 2 includes a base plate 21, a lifting threaded rod 22 and a vibrating rod 23. The base plate 21 is horizontally arranged below the rotating plate 12. A plurality of hollow connecting rods 5 are respectively fixedly connected to the bottom of the base plate 21. In this embodiment, there are four hollow connecting rods 5 and they are respectively located at the four corners of the base plate 21. The lifting threaded rod 22 is vertically installed on the base plate 21, and the upper end of the lifting threaded rod 22 passes through the rotating plate 12. The lifting threaded rod 22 is rotated by the driver 24. The vibrating rod 23 is installed at the bottom of the base plate 21, and the vibrating rod 23 is vibrated in the coarse aggregate through the vibrator 25 below the base plate 21.

[0065] Specifically, the upper end of the lifting threaded rod 22 is provided with a thread, which is threadedly connected to the rotating plate 12. The lower end of the lifting threaded rod 22 is a smooth stud with a diameter larger than the upper end. A center hole is provided on the base plate 21. The bottom of the lifting threaded rod 22 is inserted into the center hole. The lower end of the lifting threaded rod 22 is sleeved with a gasket 26. The gasket 26 is fixedly connected to the base plate 21 to limit the vertical relative displacement of the lifting threaded rod 22 and the base plate 21, and allow the lifting threaded rod 22 to rotate in the center hole. A synchronous wheel 27 is installed on the gasket 26 to rotate synchronously with the lifting threaded rod 22.

[0066] Preferably, a gear is fixedly mounted on the output shaft of the driver 24, and the gear matches the threaded teeth of the lifting threaded rod 22. When the driver 24 is turned on, the gear is driven to rotate, and the lifting threaded rod 22 is driven by the gear to rotate while performing vertical movement.

[0067] In this embodiment, four vibrating rods 23 are provided, and the four vibrating rods 23 are evenly distributed at the bottom of the base plate 21. The vibrating rod 23 is composed of a rubber tube and a metal rod head. The metal vibrating rod core is wrapped inside the rubber tube and is connected to the vibrator 25. In this embodiment, the driver 24 can adopt a conventional three-phase asynchronous motor in the prior art, such as the JW6314 three-phase asynchronous motor, and the vibrator 25 adopts a conventional concrete vibration motor, such as the YZD series vibration motor of Hongda Vibration.

[0068] like Figure 2 、 Figure 4 As shown, the screening mechanism 3 includes a screening box 31 and an iris opening and closing structure 32. The screening box 31 is located below the base plate 21, and the screening box 31 is fixedly connected to the bottom of the hollow connecting rod 5. There are multiple iris opening and closing structures 32 that are evenly distributed inside the screening box 31, and the iris opening and closing structure 32 cooperates with the transmission mechanism 4.

[0069] Specifically, a plurality of feed holes and corresponding discharge holes are respectively provided on the top and bottom of the screening box 31. The iris opening and closing structure 32 is arranged in one-to-one correspondence with the discharge holes, and a guide cylinder 33 is provided between the iris opening and closing structure 32 and the corresponding feed hole. During the vibration process, the coarse aggregate enters the iris opening and closing structure 32 from the feed hole through the guide cylinder 33, and is screened according to the aperture size of the iris opening and closing structure 32. The coarse aggregate of appropriate particle size enters the iris opening and closing structure 32 and falls out of the discharge hole.

[0070] In some preferred embodiments, the multiple iris opening and closing structures 32 are arranged in a square array. Figure 6 A row of iris opening and closing structures 32 close to the transmission mechanism 4 are connected by a synchronous belt 1 34, and the synchronous belt 1 34 cooperates with the transmission mechanism 4, and each row of iris opening and closing structures 32 are connected by a synchronous belt 2 35.

[0071] like Figure 7-Figure 9 As shown, each iris opening and closing structure 32 includes a fixed disk 321, a rotating disk 322 and an arc-shaped metal blade 323. The fixed disk 321 is installed inside the screening box 31, and the rotating disk 322 is movably arranged above the fixed disk 321. A plurality of arc-shaped metal blades 323 are provided, and each arc-shaped metal blade 323 is movably matched between the fixed disk 321 and the rotating disk 322 through a connecting column.

[0072] Specifically, a plurality of guide grooves 1 and a plurality of guide grooves 2 are respectively provided on the mutually adjacent sides of the fixed disk 321 and the rotating disk 322. The connecting column is installed on the edge side of the arc-shaped metal blade 323. The upper and lower ends of the connecting column extend into the guide groove 1 and the guide groove 2 respectively, so that each arc-shaped metal blade 323 rotates around its own central axis according to a preset trajectory. At the same time, a synchronous wheel 2 37 that cooperates with the synchronous belt 2 35 is fixedly installed on the outer periphery of the rotating disk 322. A synchronous wheel 37 that cooperates with the synchronous belt 1 34 is fixedly connected to the top of the rotating disk 322 of a row near the transmission mechanism 4. 6. The transmission mechanism 4 causes the synchronous belt 1 34 to drive the synchronous wheel 1 36 to rotate synchronously. At this time, the iris opening and closing structures 32 in a row near the transmission mechanism 4 open and close synchronously. As the synchronous wheel 1 36 rotates, it drives the rotating disk 322 in this row to rotate, causing the synchronous wheel 2 37 on the outer periphery of the rotating disk 322 in this row to rotate. The synchronous wheel 2 37 drives the rotating disks 322 in the remaining rows in each row to rotate synchronously. As a result, the multiple arc-shaped metal blades 323 of each iris opening and closing structure 32 can open and close synchronously, and the size of the central aperture can be precisely controlled to screen the coarse aggregate according to the aperture.

[0073] like Figure 7 As shown, the transmission mechanism 4 includes a transmission rod 41 and a synchronous belt three 42. The transmission rod 41 passes through the rotating plate 12, the base plate 21 and the screening box 31 in sequence and is built into the hollow connecting rod 5, and the lower end of the transmission rod 41 is provided with a synchronous wheel three 43 that cooperates with the synchronous belt one 34. The synchronous belt three 42 is connected between the transmission rod 41 and the lifting threaded rod 22. The transmission rod 41 at the connection with the synchronous belt three 42 is provided with a synchronous wheel five. The lifting threaded rod 22 and the synchronous wheel four 27 rotate at the same time, and the transmission rod 41 is rotated through the synchronous belt three 42. The transmission rod 41 cooperates with the synchronous belt one 34 through the synchronous wheel three 43 at the lower end, so that a row of rotating disks 322 close to the transmission rod 41 rotates, and then the rotating disks 322 in the same row are driven to rotate through the synchronous belt two 35, so that the multiple arc-shaped metal blades 323 of each iris opening and closing structure 32 open and close synchronously.

[0074] In this embodiment, the specifications of the synchronous wheel 43 on the transmission rod 41 can be changed and the transmission ratio can be changed to adapt to the vibration construction requirements of different ranges of coarse aggregate particle sizes and height diameter distributions in actual construction projects.

[0075] Example 2:

[0076] The present invention is a vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams. When used in actual construction, the use process is as follows: Figure 10 As shown, the following steps are included:

[0077] Adjust the rotating plate 12 so that it drives the lifting and vibrating mechanism 2 and the screening mechanism 3 to rotate horizontally, move the foot support 11 to the vibrating position of the recycled concrete beam, then adjust the lifting and vibrating mechanism 2 to the lowest position and adjust the iris opening and closing structure 32 to the closed state;

[0078] Then, the rotating plate 12 is rotated downward so that the screening mechanism 3 is inserted into the concrete to be vibrated in an arc shape and obliquely downward to prevent the coarse aggregate in the concrete to be vibrated from falling vertically and pressing the bottom of the base plate 21. When the screening mechanism 3 is rotated to the vertical direction, the limiter 13 is inserted into the foot bracket 11 and connected to the rotating plate 12 to limit the forward movement of the rotating plate 12.

[0079] The driver 24 and the vibrator 25 are turned on, and the vibrating rod 23 is used to mix the concrete to be vibrated evenly. The base plate 21 and the screening box 31 are synchronously moved upward by rotating the lifting threaded rod 22. During the rotation of the lifting threaded rod 22, the transmission rod 41 is driven to rotate by the synchronous belt 3 42. When the transmission rod 41 rotates, the arc-shaped metal blades 323 of each iris opening and closing structure 32 rotate around their respective central axes according to a predetermined trajectory. All the arc-shaped metal blades 323 expand synchronously, gradually increasing the central aperture. During the vibration process, the coarse aggregate passes through the central aperture in an orderly manner according to the particle size from small to large and is distributed in layers.

[0080] After the screening mechanism 3 moves to the surface of the concrete to be vibrated, the coarse aggregate screening in this area is completed, and the foot bracket 11 is moved to other areas along the length direction of the recycled concrete beam, and the above steps are repeated until the vibration of all areas of the recycled concrete beam is completed.

[0081] In this embodiment, when in use, the driver 24 is used to drive the lifting threaded rod 22 to rotate on the rotating plate 12, driving the lifting vibration assembly and the screening assembly to move upward, so that the vibrating rod 23 completes the vibration work from low to high. When the lifting threaded rod 22 rotates, the iris opening and closing structure 32 is driven to rotate through the transmission rod 41 and the synchronous belt 1 34, so that while the screening assembly rises, the central opening diameter of the arc-shaped metal blade 323 gradually increases. When the coarse aggregate is vibrated, the coarse aggregate with a smaller particle size first passes through the screening assembly and remains in the lower part of the recycled concrete beam, and the coarse aggregate with a larger particle size moves with the screening assembly to the upper part of the recycled concrete beam, finally achieving an orderly and controllable distribution of the coarse aggregate according to the particle size along the height direction of the recycled concrete beam, thereby improving the working performance of the recycled concrete beam.

[0082] Reference Figure 11As shown, in this embodiment, in the recycled concrete beam obtained by vibration, the coarse aggregate with larger particle size is concentrated in the upper part of the recycled concrete beam, while the coarse aggregate with smaller particle size is concentrated in the lower part of the recycled concrete beam. In actual application, when the recycled concrete beam is subjected to a vertical load F, its cross-sectional stress distribution is characterized by the upper part bearing compressive stress, which is prone to crushing failure due to insufficient concrete strength, and the lower part bearing tensile stress, which is prone to tensile cracking due to insufficient ductility. The recycled concrete beam prepared by the present invention has a larger upper aggregate particle size, which increases compressive strength, and a smaller lower aggregate particle size, which increases ductility. Compared with traditional recycled concrete beams with randomly distributed aggregates, it has better controllability and higher performance.

[0083] It should be understood that the detailed description of the embodiments of the present invention provided in the accompanying drawings is only for further explanation of the present invention and is not intended to limit the scope of the invention as claimed, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, some non-essential improvements and adjustments made by ordinary technicians in this field based on the above content of the present invention fall within the scope of protection of the present invention.

Claims

1. A vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams, characterized in that: include: Support mechanism (1), A lifting and vibrating mechanism (2) is movably connected to the interior of the support assembly and is used to vibrate the coarse aggregate in the recycled concrete beam from bottom to top; A screening mechanism (3) is arranged below the lifting and vibrating mechanism (2), and the screening mechanism (3) is connected to the lifting and vibrating mechanism (2) via a plurality of hollow connecting rods (5); The transmission mechanism (4) is connected between the lifting and vibrating mechanism (2) and the screening mechanism (3), and the transmission mechanism (4) passes through one of the hollow connecting rods (5) and extends to connect with the supporting mechanism (1).

2. A vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams according to claim 1, characterized in that: The supporting mechanism (1) comprises: Two foot supports (11) are provided, and the two foot supports (11) are arranged parallel to each other; A rotating plate (12) movably connected to the upper ends of the two foot supports (11); A limiting member (13) is connected to one of the foot supports (11) and extends into the interior of the rotating plate (12), and the rotating plate (12) and the foot support (11) are fixed by the limiting member (13).

3. A vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams according to claim 2, characterized in that: The lifting and vibrating mechanism (2) comprises: A base plate (21) is horizontally arranged below the rotating plate (12), and a plurality of hollow connecting rods (5) are respectively fixedly connected to the bottom of the base plate (21); A lifting threaded rod (22) is vertically mounted on the base plate (21), and the upper end of the lifting threaded rod (22) passes through the rotating plate (12), and the lifting threaded rod (22) is rotated by a driver (24); A vibrating rod (23) is mounted on the bottom of the base plate (21) and is vibrated in the coarse aggregate by a vibrator (25).

4. A vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams according to claim 3, characterized in that: The screening mechanism (3) comprises: A screening box (31) is located below the base plate (21) and is fixedly connected to the bottom of the plurality of hollow connecting rods (5); A plurality of iris opening and closing structures (32) are provided and evenly distributed inside the screening box (31), and the iris opening and closing structures (32) cooperate with the transmission mechanism (4).

5. A vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams according to claim 4, characterized in that: The top and bottom of the screening box (31) are respectively provided with a plurality of feed holes and corresponding discharge holes, the iris opening and closing structures (32) are arranged in one-to-one correspondence with the discharge holes, and a guide cylinder (33) is provided between the iris opening and closing structures (32) and the corresponding feed holes.

6. A vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams according to claim 4, characterized in that: The plurality of iris opening and closing structures (32) are arranged in a square array. A row of iris opening and closing structures (32) close to the transmission mechanism (4) is connected via a synchronous belt (34), and the synchronous belt (34) cooperates with the transmission mechanism (4). Each row of iris opening and closing structures (32) is connected via a synchronous belt (35).

7. A vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams according to claim 6, characterized in that: Each iris opening and closing structure (32) includes: A fixed plate (321) is installed inside the screening box (31); A rotating disk (322) is movably disposed above the fixed disk (321); A plurality of arc-shaped metal blades (323) are provided, and each arc-shaped metal blade (323) is movably engaged between the fixed disk (321) and the rotating disk (322) via a connecting column (324); The outer periphery of the rotating disk (322) is provided with a synchronous wheel 2 (37) matched with the synchronous belt 2 (35), and the top of a row of rotating disks (322) close to the transmission mechanism (4) is provided with a synchronous wheel 1 (36) matched with the synchronous belt 1 (34).

8. A vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams according to claim 7, characterized in that: The transmission mechanism (4) comprises: The transmission rod (41) passes through the rotating plate (12), the base plate (21) and the screening box (31) in sequence and is built into the hollow connecting rod (5), and the lower end of the transmission rod (41) is provided with a synchronous wheel (43) that matches the synchronous belt (34); The synchronous belt three (42) is connected between the transmission rod (41) and the lifting threaded rod (22), and the transmission rod (41) and the lifting threaded rod (22) are rotated synchronously by the synchronous belt three (42).

9. A method for using a vibrating device for orderly layered distribution of coarse aggregate in recycled concrete beams according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Adjust the rotating plate (12) so that the rotating plate (12) drives the lifting and vibrating mechanism (2) and the screening mechanism (3) to rotate in a horizontal direction, and move the foot support (11) to the vibrating position of the recycled concrete beam; S2: Adjust the lifting and vibrating mechanism (2) to the lowest position and adjust the iris opening and closing structure (32) to a closed state; S3: Rotate the rotating plate (12) downward, so that the screening mechanism (3) is inserted into the concrete to be vibrated in an arc shape and obliquely downward, and the limiter (13) is inserted into the foot bracket (11) and connected to the rotating plate (12); S4: Turn on the driver (24) and the vibrator (25), use the vibrating rod (23) to mix the concrete to be vibrated evenly, rotate the lifting threaded rod (22) to make the base plate (21) and the screening box (31) move upward synchronously, and during the rotation of the lifting threaded rod (22), the transmission rod (41) is driven to rotate by the synchronous belt three (42). When the transmission rod (41) rotates, the arc-shaped metal blades (323) of each iris opening and closing structure (32) rotate around their respective central axes according to a predetermined trajectory, and all the arc-shaped metal blades (323) expand synchronously to gradually increase the aperture, so that the coarse aggregate is distributed in layers in an orderly manner according to the particle size from small to large during the vibration process; S5: After the screening mechanism (3) moves to the surface of the concrete to be vibrated, steps S1 to S4 are repeated until the vibration of the entire area of the recycled concrete beam is completed.

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