Preparation device and process for recycled concrete

Abstract

The present application discloses a preparation device and process for recycled concrete, which relates to the field of recycled concrete preparation. It includes a tank body, a stirring rod, an opening and closing plate, and a driving member for driving the opening and closing plate to rotate. A square part is formed on the lower side of the tank body, and a conical discharging part is formed in the tank body within the square part. The stirring rod is rotatably arranged in the tank body. There are two opening and closing plates, both of which are rotatable within the square part. The two opening and closing plates are located above the conical discharging part. A plurality of rolling conveyors are arranged on the opening and closing plates, and a driving assembly for driving the rolling conveyors to rotate is arranged on the tank body. When the opening and closing plates are opened, the driving assembly drives the rolling conveyors to rotate. The present application helps to improve the quality of recycled concrete and also helps to improve the discharging efficiency.

Description

Technical Field

[0001] The present application relates to the field of recycled concrete preparation, and in particular to a device and process for preparing recycled concrete. Background Art

[0002] Recycled concrete refers to new concrete formed by crushing, cleaning, and grading waste concrete blocks, mixing them in a certain proportion and gradation, partially or completely replacing natural aggregates such as sand and gravel (mainly coarse aggregates), and then adding cement, water, etc.

[0003] During the mixing process, a mixing tank is used for mixing and stirring. A conical discharging part is formed below the mixing tank. The stirring rod does not extend into the conical discharging part to prevent the stirring rod from causing obstruction during discharging. However, in practice, after the raw materials are put into the mixing tank, they will settle at the conical discharging part. At this time, the stirring action of the stirring rod cannot act on the concrete in the conical discharging part, which will ultimately lead to poor stirring effect and thus affect the quality of recycled concrete. Summary of the Invention

[0004] In order to improve the quality of recycled concrete, the present application provides a device and process for preparing recycled concrete.

[0005] The device and process for preparing recycled concrete provided by the present application adopt the following technical solutions:

[0006] A device for preparing recycled concrete includes a tank body, a stirring rod, an opening and closing plate, and a driving member for driving the opening and closing plate to rotate. A square part is formed on the lower side of the tank body. A conical discharging part is formed in the tank body within the square part. The stirring rod is rotatably arranged in the tank body. There are two opening and closing plates, both of which are rotatably arranged in the square part. The two opening and closing plates are located above the conical discharging part. A plurality of rolling conveyors are arranged on the opening and closing plates. A driving assembly for driving the rolling conveyors to rotate is arranged on the tank body. When the opening and closing plates are opened, the driving assembly drives the rolling conveyors to rotate.

[0007] By adopting the above technical solutions, in the initial state, the two opening and closing plates are in a closed state, that is, when raw materials are put into the tank body at this time, the raw materials will not enter the conical discharging part, and the opening and closing plates play a limiting role. Then, when the stirring rod performs the stirring operation, the stirring effect on all the concrete can be ensured, and the quality of recycled concrete can be improved. When the stirring is completed, the opening and closing plates are opened, and the recycled concrete will be discharged from the conical discharging part to realize the discharging action. However, because the outlet diameter of the conical discharging part is small, there will be a blockage phenomenon during the discharging process, resulting in a decrease in the discharging speed. During this process, through the rotation of the rolling conveyors, a conveying force can be generated on the recycled concrete, so that the recycled concrete can be quickly discharged, which helps to improve the discharging efficiency.

[0008] Preferably, two inclined guiding plates are symmetrically arranged inside the square part of the tank body. The lower ends of the two inclined guiding plates are in a converging shape. Two vertical plates are also symmetrically arranged inside the square part of the tank body. The two vertical plates are located at the ends of the two inclined guiding plates and enclose a closed discharging area with the inclined guiding plates.

[0009] By adopting the above technical solution, when the opening and closing plate is opened, the opening and closing plate will gradually fit on the surface of the inclined guiding plate. The end of the inclined guiding plate is a vertical plate, which can ensure the smooth rotation of the opening and closing plate.

[0010] Preferably, an inclined part is formed on the lower side of the vertical plate, and the inclined part is connected to the lower end of the inclined guiding plate to jointly enclose a discharge port.

[0011] By adopting the above technical solution, an inclined part connected to the lower end of the inclined guiding plate is formed on the lower side of the vertical plate, and finally a discharge port is enclosed. The size of this discharge port decreases, which is convenient for receiving materials from below the tank body; if the lower side of the vertical part is also vertical, the discharge port will be in a long strip shape, which puts new requirements on the receiving port of the receiving device, so the applicability will decrease.

[0012] Preferably, an installation gap is formed between the inclined guiding plate and the square part. The driving member is set as a hydraulic cylinder. The hydraulic cylinder is located in the installation gap. The cylinder body of the hydraulic cylinder is hinged to the inner wall of the square part. The end of the piston rod of the hydraulic cylinder passes through the inclined guiding plate and is hinged to the lower side of the opening and closing plate.

[0013] By adopting the above technical solution, the rotation of the opening and closing plate can be realized by driving the hydraulic cylinder, that is, the opening and closing of the opening and closing plate can be realized.

[0014] Preferably, the rolling conveyor is a conveyor roller, and the conveying direction of the conveyor roller is upward along the inclined direction of the opening and closing plate.

[0015] By adopting the above technical solution, in practice, when the opening and closing plate is rotated and opened for discharging, the concrete will move downward. The concrete in the middle will directly flow vertically towards the discharge port, and the concrete on the inner wall side of the tank body will flow along the opening and closing plate towards the discharge port, and the flow direction is inclined. At this time, the two flow directions will cause the concrete to be squeezed at the discharge port, resulting in a certain congestion and blockage at the discharge port, leading to a decrease in the feeding speed; by driving the conveyor roller to rotate through the driving assembly, and the conveyor roller conveys the concrete upward, which reduces the downward flow speed of the inner concrete, thereby reducing the extrusion force and helping to improve the feeding speed of the concrete.

[0016] Preferably, the conveying rollers are all rotatably arranged on the opening and closing plate. An accommodating opening for accommodating the conveying rollers is formed on the opening and closing plate. A rotating sleeve is formed at the end of the conveying roller. The rotating sleeve is rotatably connected to the opening and closing plate, and the rotating sleeve extends into the interior of the opening and closing plate. The rotating sleeves of all the conveying rollers are connected through a pulley assembly to achieve synchronous transmission. The driving assembly includes a first gear, a second gear, a third gear, and a driving motor for driving the first gear to rotate. The second gear meshes with the third gear. The third gear is coaxially fixed on one of the rotating sleeves. When the opening and closing plate is opened, the first gear meshes with the second gear.

[0017] By adopting the above technical solution, when the opening and closing plate is opened, the second gear meshes with the first gear, and then the driving motor operates to drive the first gear to rotate. The first gear drives the third gear to rotate through the second gear, and the third gear drives the conveying roller to rotate. Then, through the pulley assembly, the synchronous rotation of all the conveying rollers is realized.

[0018] Preferably, a plurality of conveying plates are arranged on the conveying roller in a circumferential array.

[0019] By adopting the above technical solution, when the conveying roller rotates, the conveying plates rotate synchronously, which can improve the blocking and retention effects on the concrete, and further improve the discharging effect of the concrete.

[0020] Preferably, sealing gaskets are arranged on both sides of the accommodating opening, and the sealing gaskets are both bent. The free ends of the sealing gaskets are lapped on the surface of the conveying roller, and the lapping position is located above the axis of the conveying roller. An arc-shaped elastic sheet is arranged inside the sealing gasket, and the center of curvature of the arc-shaped elastic sheet is located on the side far from the conveying roller. The conveying plate is arranged to be lifted and lowered on the surface of the conveying roller, and will descend to avoid the sealing gasket when the conveying plate moves to the sealing gasket.

[0021] By adopting the above technical solution, due to the existence of the conveying plate, there will be a large gap between the conveying roller and the accommodating opening. In order to prevent the concrete from entering the opening and closing plate, sealing measures are required, but conventional sealing means are difficult to achieve. In this application, the sealing gasket is lapped on the surface of the conveying roller to increase the sealing area. When the conveying roller rotates, the conveying roller will rotate relative to the sealing gasket. And when the opening and closing plate is in the closed state, under the pressure of the concrete, the sealing gasket will increase the abutting force between the sealing gasket and the conveying roller, thereby increasing the sealing effect. In the state where the opening and closing plate is opened, the concrete pressure will also act on the upper sealing gasket, and a large sealing force will continue to be maintained. Under the blocking of the conveying roller, the concrete pressure will not act on the lower sealing gasket, that is, the lower sealing gasket will not fail.

[0022] Preferably, a fixed rod is fixedly connected to the opening and closing plate, the conveying roller is rotatably connected to the fixed rod, a cam is fixedly connected to the fixed rod, and a protruding portion is formed on the cam; one end of the conveying plate located inside the conveying roller is provided with an abutting rod, an abutting wheel is rotatably connected to the abutting rod, the abutting wheel is always in contact with the cam, an abutting plate is arranged on the abutting rod, a compression spring is sleeved on the abutting rod, one end of the compression spring is connected to the abutting plate, and the other end of the compression spring is connected to the inner wall of the conveying roller; when the abutting wheel moves to the protruding portion of the cam, the conveying plate extends out of the surface of the conveying roller.

[0023] By adopting the above technical solution, when the conveying roller rotates, the abutting rod rotates accordingly, and the abutting wheel rotates on the cam. When the abutting wheel rotates to the cam portion of the cam, the conveying plate extends out of the surface of the conveying roller. At this time, the conveying plate is just located outside the opening and closing plate to block and convey the concrete; when the abutting wheel disengages from the cam portion, under the action of the compression spring, the conveying plate retracts into the conveying roller, which can avoid the sealing gasket and prevent contact with the sealing gasket, driving the sealing gasket to change and resulting in sealing failure.

[0024] A preparation process for recycled concrete, using the above preparation device, includes the following steps:

[0025] S1: Close the opening and closing plate, and put raw materials such as recycled aggregate, cement, and water into the tank body;

[0026] S2: The stirring rod performs stirring;

[0027] S3: After the stirring is completed, open the opening and closing plate for discharging;

[0028] In step S3, the driving component drives the rolling conveyor on the opening and closing plate to rotate.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. By blocking the conical discharging part with the opening and closing plate, the raw materials can be prevented from entering the conical discharging part, thereby ensuring the stirring effect. When the opening and closing plate is opened for discharging, the driving component drives the rolling conveyor to rotate, generating a conveying force on the concrete, which helps to improve the discharging efficiency;

[0031] 2. The conveying direction of the conveying roller is upward, which can reduce the falling speed of the concrete on the opening and closing plate, enabling the concrete located in the middle of the tank body to quickly drop, thereby improving the discharging efficiency and preventing blockage at the discharging port;

[0032] 3. The gasket overlaps on the conveying roller, increasing the sealing area and ensuring the sealing effect. When the opening and closing plate is closed and in the stirring state, the pressure of the concrete acts on the gasket. Due to the existence of the arc-shaped elastic piece, the pressing force between the gasket and the conveying roller increases, improving the sealing effect. When the opening and closing plate is opened and in the discharging state, the conveying roller rotates relative to the gasket, and since the bending point of the arc-shaped elastic piece is higher than the axis of the conveying roller, the conveying roller will not drive the gasket to move into the receiving port, ensuring the reliability of the seal;

[0033] 4. The conveying plate can increase the conveying area and conveying force, improving the blocking and retention effect on the concrete. And through the cooperation between the abutting wheel and the cam, the conveying plate can avoid the gasket, that is, while ensuring the seal, the discharging efficiency is improved. Description of the Drawings

[0034] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present application;

[0035] Figure 2 It is a schematic diagram of a partial structure of the first embodiment of the present application, mainly showing the structures of the inclined guiding plate and the vertical plate;

[0036] Figure 3 It is a schematic diagram of a partial structure of the first embodiment of the present application, mainly showing the structure of the conveying roller;

[0037] Figure 4 It is a schematic diagram of a partial structure of the first embodiment of the present application, mainly showing the structure of the driving assembly;

[0038] Figure 5 It is a cross-sectional structure schematic diagram of a partial structure of the second embodiment of the present application, mainly showing the structure of the conveying plate;

[0039] Figure 6 It is Figure 5 The partial enlarged view of A in

[0040] Reference numerals: 1, tank body; 11, inclined guiding plate; 12, vertical plate; 121, inclined part; 13, discharge port; 14, installation gap; 2, stirring rod; 3, opening and closing plate; 31, receiving port; 311, sealing surface; 4, square part; 5, conical discharging part; 6, driving assembly; 61, first gear; 62, second gear; 63, third gear; 64, driving motor; 7, hydraulic cylinder; 8, conveying roller; 81, rotating sleeve; 9, conveying plate; 91, abutting rod; 92, abutting wheel; 93, abutting plate; 94, compression spring; 10, gasket; 101, arc-shaped elastic piece; 20, fixing rod; 30, cam; 301, protruding part. Detailed Embodiments

[0041] The following combines the attached Figure 1 - attachedFigure 6 A further detailed description of the present application is provided below.

[0042] The present application discloses a preparation device for recycled concrete.

[0043] Example 1

[0044] Referring to Figure 1 , the preparation device and process for recycled concrete include a tank body 1, a stirring rod 2, a switchable plate 3, and a driving member. The upper side of the tank body 1 is cylindrical, and the lower side of the tank body 1 is cuboid-shaped and forms a square portion 4. A conical discharging portion 5 is formed within the tank body 1 located within the square portion 4. The stirring rod 2 is rotatably arranged on the upper side within the tank body 1, and the stirring rod 2 is driven to rotate by a motor. The switchable plate 3 is hinged within the square portion 4, at the upper port of the conical discharging portion 5. There are two switchable plates 3 which are arranged oppositely, and the two switchable plates 3 are used to block the conical discharging portion 5.

[0045] In the initial state, the two switchable plates 3 are in the closed position. At this time, when raw materials are put into the tank body 1, the raw materials will be blocked by the switchable plates 3 and cannot enter the conical discharging portion 5. This design ensures that the stirring rod 2 can fully mix all the concrete during the stirring process, thereby improving the quality of the recycled concrete. After the stirring is completed, the switchable plates 3 are opened, and the recycled concrete is smoothly discharged through the conical discharging portion 5 to complete the discharging process.

[0046] A plurality of rolling conveyors are arranged on the switchable plate 3, and a driving assembly 6 for driving the rolling conveyors to rotate is arranged on the tank body 1. When the switchable plate 3 is opened for discharging, the rolling conveyors rotate.

[0047] After the stirring is completed, the switchable plate 3 is opened, and the recycled concrete is discharged from the conical discharging portion 5 to complete the discharging. However, since the outlet diameter 13 of the conical discharging portion 5 gradually becomes smaller, blockage is likely to occur during the discharging process, resulting in a reduced discharging speed. At this time, by the rotation of the rolling conveyors, a conveying force can be applied to the recycled concrete, thereby effectively improving the discharging efficiency.

[0048] Referring to Figure 1 and Figure 2 , within the square portion 4, two inclined guiding plates 11 are symmetrically installed on both sides of the tank body 1, and the lower ends of these two guiding plates converge inward. In addition, two vertical plates 12 are symmetrically installed on the tank body 1 within the square portion 4. The two vertical plates 12 are respectively located at the ends of the inclined guiding plates 11 and jointly enclose a closed discharging area with the inclined guiding plates 11. The inclined guiding plates 11 and the vertical plates 12 jointly form the conical discharging portion 5.

[0049] An inclined portion 121 is formed on the lower side of the vertical plate 12. The inclined portion 121 is connected to the lower end of the inclined guide plate 11, and they jointly enclose to form a discharge port 13. The lower part of the vertical plate 12 is designed as an inclined structure and is connected to the lower end of the inclined guide plate 11, jointly forming a discharge port 13 with a smaller size. This design facilitates receiving the material from below the tank body 1. If the lower part of the vertical plate 12 remains vertical, the discharge port 13 will be in a long strip shape, which will pose higher requirements for the receiving port of the material receiving device, thereby reducing its applicability. The upper side of the vertical plate 12 is vertical, which can avoid the rotation of the opening and closing plate 3.

[0050] An installation gap 14 is formed between the inclined guide plate 11 and the square portion 4. The driving member is a hydraulic cylinder 7. The hydraulic cylinder 7 is installed in the installation gap 14. The cylinder body of the hydraulic cylinder 7 is hinged to the inner wall of the square portion 4 through a hinge, and the piston rod passes through the inclined guide plate 11 and is hinged to the lower side of the opening and closing plate 3. This design enables the operation of the hydraulic cylinder 7 to drive the rotation of the opening and closing plate 3, thereby controlling the opening and closing of the opening and closing plate 3.

[0051] Refer to Figure 1 and Figure 3 , the rolling conveyor is set as a conveyor roller 8, and its conveying direction conforms to the inclined angle of the opening and closing plate 3 and is upward. In actual operation, after the opening and closing plate 3 rotates and opens, the concrete starts to be discharged. The middle part flows vertically towards the discharge port 13, while the concrete near the inner wall of the tank body 1 flows along the inclination of the opening and closing plate 3 towards the discharge port 13. This two-way flow may cause the concrete to accumulate at the discharge port 13, resulting in blockage and slowing down the discharging speed. By rotating the conveyor roller 8 through the driving assembly 6 and conveying the concrete upward, the downward flow speed of the inner-side concrete can be reduced, the extrusion can be alleviated, and thus the discharging speed of the concrete can be accelerated.

[0052] Moreover, when the conveyor roller 8 rotates, it will not only generate an upward force on the concrete, but also generate a force on the concrete to move towards the middle, and then generate a downward thrust on the concrete in the middle, and further can also accelerate the downward flow speed of the middle concrete, improving the discharging efficiency.

[0053] Refer to Figure 1 , Figure 3 and Figure 4, the conveying rollers 8 are all rotatably connected to the opening and closing plate 3. The opening and closing plate 3 is provided with a receiving opening 31 for receiving the conveying rollers 8. The end of the conveying roller 8 is equipped with a rotating sleeve 81, which is rotatably connected to the opening and closing plate 3 and extends into the interior of the opening and closing plate 3. The rotating sleeves 81 of all the conveying rollers 8 are synchronously rotated through a pulley assembly. The driving assembly 6 includes a first gear 61, a second gear 62, a third gear 63 and a driving motor 64. The second gear 62 is rotatably connected within the opening and closing plate 3 and partially protrudes from the bottom of the opening and closing plate 3. The second gear 62 is always meshed with the third gear 63. The third gear 63 is coaxially fixed on one of the rotating sleeves 81. The first gear 61 is rotatably connected within the installation gap 14. The driving motor 64 is installed on the inclined guide plate 11 and is located within the installation gap 14. The output shaft of the driving motor 64 rotates coaxially with the first gear 61. When the opening and closing plate 3 is opened, the second gear 62 is meshed with the first gear 61, and the driving motor 64 is started, and the conveying rollers 8 are synchronously rotated through gear transmission. Correspondingly, avoidance openings for avoiding the second gear 62 are provided on both the lower side of the opening and closing plate 3 and the inclined guide plate 11.

[0054] And a sealing surface 311 adapted to the surface shape of the conveying roller 8 is formed on the inner direction of the receiving opening 31 of the opening and closing plate 3, that is, during the rotation of the conveying roller 8, concrete will not enter the opening and closing plate 3 to affect the transmission effect.

[0055] The implementation principle of the preparation device for recycled concrete in this application embodiment is as follows: during the closing state of the opening and closing plate 3, the stirring operation is carried out. At this time, the stirring rod 2 can fully stir the concrete, which helps to improve the quality of the recycled concrete; when the opening and closing plate 3 is opened for discharging, the conveying roller 8 rotates upward to reduce the falling speed of the concrete on the opening and closing plate 3, so that the concrete flowing vertically downward in the middle can flow quickly to achieve discharging, thereby effectively avoiding the situation of blockage and improving the discharging speed.

[0056] Embodiment 2

[0057] Referring to Figure 5 and Figure 6 , the difference between this embodiment and Embodiment 1 is that a plurality of conveying plates 9 are distributed along the circumference on the surface of the conveying roller 8. The conveying plates 9 rotate with the conveying roller 8, enhancing the blocking and retention effects on the concrete and further improving the discharging efficiency.

[0058] And in this embodiment, due to the presence of the conveying plates 9, the gap between the conveying plates 9 and the receiving opening 31 is relatively large. If the concrete enters the receiving opening 31, it will generate a large resistance to the rotation of the conveying plates 9. Therefore, more effective sealing measures are also required in this embodiment to prevent the concrete from entering the sealing surface 311.

[0059] On both sides of the accommodating opening 31 of the opening and closing plate 3, there are curved sealing gaskets 10. The free ends thereof cover the surface of the conveying roller 8, and the overlapping position is above the axis of the conveying roller 8. An arc-shaped elastic sheet 101 is installed inside the sealing gasket 10. The center of curvature thereof is located on the side away from the conveying roller 8, and the bending point of the arc-shaped elastic sheet 101 is higher than the axis of the conveying roller 8; the conveying plate 9 can move up and down on the surface of the conveying roller 8 and descends when moving to the position of the sealing gasket 10 to avoid contacting the sealing gasket 10. When the sealing gasket 10 overlaps the surface of the conveying roller 8, the arc-shaped elastic sheet 101 is in a bent state and has deformation; under the action of the arc-shaped elastic sheet 101, the state of the sealing gasket 10 can be maintained, and the sealing gasket 10 can be prevented from bending inwards under friction or pressure.

[0060] In this solution, the sealing gasket 10 covers the surface of the conveying roller 8, expanding the sealing area. When the conveying roller 8 rotates, the conveying roller 8 will rotate relative to the sealing gasket 10. In the closed state of the opening and closing plate 3, the pressure of the concrete acts on the sealing gasket 10, increasing the contact force between the sealing gasket 10 and the conveying roller 8, thereby enhancing the sealing effect. In the open state of the opening and closing plate 3, the pressure of the concrete also acts on the upper sealing gasket 10, continuing to maintain a strong sealing force. Due to the blocking of the conveying roller 8, the pressure of the concrete will not affect the lower sealing gasket 10, so the lower sealing gasket 10 will not fail.

[0061] When friction occurs between the rotation of the conveying roller 8 and the upper sealing gasket 10, the sealing gasket 10 will deform, and there is a tendency to deform towards the sealing surface 311. However, because the bending point of the arc-shaped elastic sheet 101 is higher than the axis of the conveying roller 8, it is difficult for the bending point of the arc-shaped elastic sheet 101 to cross below the axis of the conveying roller 8. Therefore, under the action of the arc-shaped elastic sheet 101, the more the sealing gasket 10 deforms, the tighter the sealing force between it and the conveying roller 8, ensuring the sealing effect.

[0062] A fixing rod 20 is fixed on the opening and closing plate 3. The conveying roller 8 is sleeved on the fixing rod 20 and forms a rotational fit with the fixing rod 20. A cam 30 is installed on the fixing rod 20, and a protruding portion 301 is formed on the cam 30. An abutting rod 91 is installed at one end of the conveying plate 9 inside the conveying roller 8. An abutting wheel 92 is rotatably connected to the abutting rod 91, and the abutting wheel 92 is always in contact with the cam 30. An abutting plate 93 and a compression spring 94 are further provided on the abutting rod 91. The compression spring 94 is sleeved on the abutting rod 91, with one end connected to the abutting plate 93 and the other end connected to the inner wall of the conveying roller 8. When the abutting wheel 92 moves to the protruding portion 301 of the cam 30, the conveying plate 9 extends out of the surface of the conveying roller 8 to block and convey the concrete; when the abutting wheel 92 leaves the protruding portion 301, the conveying plate 9 retracts under the action of the compression spring 94 to avoid contacting the sealing gasket 10, ensuring the sealing effect.

[0063] The present application also discloses a preparation process of recycled concrete. Using any one of the preparation devices in the above two embodiments, it includes the following steps:

[0064] S1: Close the opening and closing plate 3, and put raw materials such as recycled aggregate, cement, and water into the tank body 1;

[0065] S2: The stirring rod 2 performs stirring;

[0066] S3: After the stirring is completed, open the opening and closing plate 3 to discharge the material.

[0067] In step S3, the driving assembly 6 synchronously drives the conveying roller 8 on the opening and closing plate 3 to rotate upward.

[0068] The above are all the preferred embodiments of the present application. Without limiting the protection scope of the present application accordingly, therefore: Any equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A preparation device for recycled concrete, characterized in that: It includes a tank body (1), a stirring rod (2), a opening and closing plate (3) and a driving member for driving the opening and closing plate (3) to rotate. A square portion (4) is formed at the lower side of the tank body (1). A conical discharging portion (5) is formed in the tank body (1) within the square portion (4). The stirring rod (2) is rotatably arranged in the tank body (1). Two opening and closing plates (3) are provided and both are rotatably arranged in the square portion (4). The two opening and closing plates (3) are located above the conical discharging portion (5). A plurality of rolling conveyors are arranged on the opening and closing plate (3). A driving assembly (6) for driving the rolling conveyors to rotate is arranged on the tank body (1). The rolling conveyors are conveying rollers (8). The driving assembly (6) includes a first gear (61), a second gear (62), a third gear (63) and a driving motor (64) for driving the first gear (61) to rotate. The second gear (62) meshes with the third gear (63). The third gear (63) rotates coaxially with the conveying roller (8). When the opening and closing plate (3) is opened, the first gear (61) meshes with the second gear (62). The conveying direction of the conveying roller (8) is upward along the inclined direction of the opening and closing plate (3). The conveying rollers (8) are all rotatably arranged on the opening and closing plate (3). A receiving opening (31) for receiving the conveying roller (8) is formed on the opening and closing plate (3). A rotating sleeve (81) is formed at the end of the conveying roller (8). The rotating sleeve (81) is rotatably connected to the opening and closing plate (3), and the rotating sleeve (81) extends into the interior of the opening and closing plate (3). The rotating sleeves (81) of all the conveying rollers (8) are connected by a pulley assembly to achieve synchronous transmission. The third gear (63) is coaxially fixed on one of the rotating sleeves (81).

2. The preparation device of recycled concrete according to claim 1, characterized in that: Two inclined guiding plates (11) are symmetrically arranged in the tank body (1) within the square portion (4). The lower ends of the two inclined guiding plates (11) are in a converging shape. Two vertical plates (12) are also symmetrically arranged in the tank body (1) within the square portion (4). The two vertical plates (12) are located at the ends of the two inclined guiding plates (11) and enclose a closed discharging area with the inclined guiding plates (11).

3. The preparation device of recycled concrete according to claim 2, characterized in that: An inclined portion (121) is formed at the lower side of the vertical plate (12), and the inclined portion (121) is connected to the lower end of the inclined guiding plate (11) to jointly enclose a discharging port (13).

4. The preparation device of recycled concrete according to claim 3, characterized in that: An installation gap (14) is formed between the inclined guiding plate (11) and the square portion (4). The driving member is a hydraulic cylinder (7). The hydraulic cylinder (7) is located within the installation gap (14). The cylinder body of the hydraulic cylinder (7) is hinged to the inner wall of the square portion (4). The end of the piston rod of the hydraulic cylinder (7) passes through the inclined guiding plate (11) and is hinged to the lower side of the opening and closing plate (3).

5. The preparation device of recycled concrete according to claim 1, characterized in that: A plurality of conveying plates (9) are arranged in a circumferential array on the conveying roller (8).

6. The preparation device of recycled concrete according to claim 5, characterized in that: Sealing gaskets (10) are provided on both sides of the accommodation opening (31), and the sealing gaskets (10) are both bent. The free ends of the sealing gaskets (10) are lapped on the surface of the conveying roller (8), and the lapping position is on the upper side of the axis of the conveying roller (8). An arc-shaped elastic sheet (101) is provided inside the sealing gasket (10), and the center of curvature of the arc-shaped elastic sheet (101) is located on the side away from the conveying roller (8); the conveying plate (9) is arranged to be lifted and lowered on the surface of the conveying roller (8), and when the conveying plate (9) moves to the position of the sealing gasket (10), it will descend to avoid the sealing gasket (10).

7. The preparation device of recycled concrete according to claim 6, characterized in that: A fixing rod (20) is fixedly connected to the opening and closing plate (3), the conveying roller (8) is rotatably connected to the fixing rod (20), and a cam (30) is fixedly connected to the fixing rod (20), and a protruding portion (301) is formed on the cam (30); One end of the conveying plate (9) located inside the conveying roller (8) is provided with an abutting rod (91), an abutting wheel (92) is rotatably connected to the abutting rod (91), the abutting wheel (92) is always in contact with the cam (30), and an abutting plate (93) is arranged on the abutting rod (91), a compression spring (94) is sleeved on the abutting rod (91), one end of the compression spring (94) is connected to the abutting plate (93), and the other end of the compression spring (94) is connected to the inner wall of the conveying roller (8); when the abutting wheel (92) moves to the protruding portion (301) of the cam (30), the conveying plate (9) extends out of the surface of the conveying roller (8).

8. A preparation process of recycled concrete, characterized in that: Using the preparation device according to any one of claims 1-7, comprising the following steps: S1: Close the opening and closing plate (3), and put raw materials such as recycled aggregate, cement, and water into the tank body (1); S2: The stirring rod (2) performs stirring; S3: After the stirring is completed, open the opening and closing plate (3) for discharging; In step S3, the driving assembly (6) drives the rolling conveyor on the opening and closing plate (3) to rotate.

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