Preparation device and process of recycled concrete

Abstract

The invention discloses a recycled concrete preparation device and process, and relates to the field of recycled concrete preparation, the recycled concrete preparation device comprises a tank body, a stirring rod, an opening and closing plate and a driving part 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 position, located in the square part, of the tank body, and the stirring rod is rotationally arranged in the tank body; the two opening and closing plates are arranged in the square part in a rotating mode, the two opening and closing plates are located on the upper side of the conical discharging part, a plurality of rolling conveying bodies are arranged on the opening and closing plates, a driving assembly for driving the rolling conveying bodies to rotate is arranged on the tank body, and when the opening and closing plates are opened, the driving assembly drives the rolling conveying bodies to rotate. According to the invention, the quality of the recycled concrete can be improved, and the unloading efficiency can be improved.

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 made by crushing, cleaning, and grading discarded concrete blocks, mixing them with grading in a certain proportion, 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 discharge portion is formed at the bottom of the mixing tank, and the stirring rod does not extend into the conical discharge portion to prevent the stirring rod from being blocked during discharge. However, in practice, after the raw materials are put into the mixing tank, they will settle at the conical discharge portion. At this time, the stirring action of the stirring rod cannot play a role in the concrete in the conical discharge portion, which will eventually lead to poor mixing effect and 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 present application provides a device and process for preparing recycled concrete using the following technical solutions: A device for preparing recycled concrete comprises a tank body, a stirring rod, an opening and closing plate and a driving member for driving the opening and closing plate to rotate, wherein a square portion is formed on the lower side of the tank body, a conical discharge portion is formed on the tank body in the square portion, the stirring rod is rotatably arranged in the tank body, two opening and closing plates are provided and both rotate in the square portion, the two opening and closing plates are located on the upper side of the conical discharge portion, a plurality of rolling conveying bodies are arranged on the opening and closing plates, a driving assembly for driving the rolling conveying bodies to rotate is arranged on the tank body, and when the opening and closing plates are opened, the driving assembly drives the rolling conveying bodies to rotate.

[0006] By adopting the above technical scheme, 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, the raw materials will not enter the conical discharge part, and the opening and closing plates play a limiting role. Then, when the stirring rod is performing the stirring operation, the stirring effect on all concretes can be guaranteed, thereby improving the quality of the recycled concrete; when the stirring is completed, the opening and closing plates are opened, and the recycled concrete will be discharged from the conical discharge part to realize the unloading action. However, since the discharge port of the conical discharge part has a small diameter, there will be blockage during the unloading process, resulting in a decrease in the unloading speed. During this process, the rotation of the rolling conveyor body can generate a conveying force on the recycled concrete, thereby allowing the recycled concrete to be discharged quickly, which helps to improve the unloading efficiency.

[0007] Preferably, the tank body is located in the square part and has two symmetrically arranged inclined guide plates, the lower ends of the two inclined guide plates are in a retracted shape, and the tank body is also located in the square part and has two symmetrically arranged vertical plates, the two vertical plates are located at the ends of the two inclined guide plates and are surrounded by the inclined guide plates to form a closed unloading area.

[0008] 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 guide plate, and the end of the inclined guide plate is a vertical plate, which can ensure the smooth rotation of the opening and closing plate.

[0009] Preferably, an inclined portion is formed on the lower side of the vertical plate, and the inclined portion is connected to the lower end of the inclined guide plate to jointly form a discharge port.

[0010] By adopting the above technical solution, an inclined portion connected to the lower end of the inclined guide plate is formed on the lower side of the vertical plate, and finally a discharge port is formed. The size of the discharge port is reduced, which is convenient for receiving materials from the bottom of the tank body. If the lower side of the vertical portion is also vertical, the discharge port will be long and strip-shaped, which will produce new requirements for the receiving port of the receiving device, and thus the applicability will be reduced.

[0011] Preferably, an installation gap is formed between the inclined guide plate and the square part, the driving member is configured 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, and the end of the piston rod of the hydraulic cylinder passes through the inclined guide plate and is hinged to the lower side of the opening and closing plate.

[0012] By adopting the above technical solution, the opening and closing plates can be rotated by driving the hydraulic cylinder, that is, the opening and closing of the opening and closing plates can be achieved.

[0013] Preferably, the rolling conveying body is a conveying roller, and the conveying direction of the conveying roller is upward along the inclined direction of the opening and closing plate.

[0014] By adopting the above technical solution, in practice, when the opening and closing plate is rotated and opened for unloading, the concrete will move downward, the concrete in the middle will directly flow to the discharge port in the vertical direction, and the concrete located on the inner wall side of the tank body will flow to the discharge port along the opening and closing plate, and the flow direction is inclined. At this time, the two flow directions will cause the concrete to be squeezed at the discharge port, and then a certain congestion will be generated at the discharge port, and then blockage will occur, resulting in a decrease in the discharge speed; the conveying roller is driven to rotate by the driving component, and the conveying roller conveys concrete upward, so that the speed at which the inner concrete flows downward is reduced, thereby reducing the extrusion force, which helps to increase the concrete discharge speed.

[0015] Preferably, the conveying rollers are all rotatably arranged on the opening and closing plate, and 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, and 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, and 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 is meshed with the third gear, and the third gear is coaxially fixed on one of the rotating sleeves; when the opening and closing plate is opened, the first gear is meshed with the second gear.

[0016] 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 is operated 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, and then through the pulley assembly, the synchronous rotation of all conveying rollers is realized.

[0017] Preferably, the conveying roller has a plurality of conveying plates distributed in a circumferential array.

[0018] By adopting the above technical solution, when the conveying roller rotates, the conveying plate rotates synchronously, which can improve the blocking and retention effect of concrete, and further improve the concrete feeding effect.

[0019] Preferably, sealing gaskets are provided on both sides of the accommodating port, and the sealing gaskets are curved, the free ends of the sealing gaskets overlap the surface of the conveying roller, and the overlapping position is located on the upper side of the axis of the conveying roller, and an arc-shaped spring sheet is provided inside the sealing gasket, and the center of curvature of the arc-shaped spring sheet is located on the side away from the conveying roller; the conveying plate is lifted and lowered on the surface of the conveying roller, and when the conveying plate moves to the sealing gasket, it will descend to avoid the sealing gasket.

[0020] By adopting the above technical scheme, due to the existence of the conveying plate, a large gap will be formed between the conveying roller and the accommodating port. In order to prevent concrete from entering the opening and closing plate, sealing measures need to be taken, which are difficult to achieve with conventional sealing means. In the present application, the sealing pad is overlapped 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 pad. When the opening and closing plate is in the closed state, the pressure of the concrete acts on the sealing pad, which will increase the abutment force between the sealing pad and the conveying roller, thereby increasing the sealing effect. When the opening and closing plate is in the open state, the concrete pressure will also act on the sealing pad on the upper side, and a large sealing force will continue to be maintained. The sealing pad on the lower side will not be acted on by the pressure of the concrete under the obstruction of the conveying roller, that is, the sealing pad on the lower side will not be invalidated.

[0021] Preferably, a fixing rod is fixedly connected to the opening and closing plate, and the conveying roller is rotatably connected to the fixing rod, and a cam is fixedly connected to the fixing rod, and a protrusion is formed on the cam; an abutment rod is provided at one end of the conveying plate located inside the conveying roller, and an abutment wheel is rotatably connected to the abutment rod, and the abutment wheel is always in abutment with the cam, and an abutment plate is provided on the abutment rod, and a compression spring is sleeved on the abutment rod, one end of the compression spring is connected to the abutment plate, and the other end of the compression spring is connected to the inner wall of the conveying roller; when the abutment wheel moves to the protrusion of the cam, the conveying plate extends out of the surface of the conveying roller.

[0022] By adopting the above technical solution, when the conveying roller rotates, the abutment rod rotates accordingly, and the abutment wheel rotates on the cam. When the abutment 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 on the outside of the opening and closing plate, blocking the conveying of concrete; when the abutment wheel is disengaged from the cam portion, under the action of the compression spring, the conveying plate retracts into the conveying roller, avoiding the sealing gasket and preventing contact with the sealing gasket, causing the sealing gasket to change and resulting in sealing failure.

[0023] A process for preparing recycled concrete, using the above-mentioned preparation device, comprises the following steps: S1: Close the opening and closing plate and put the recycled aggregate, cement, water and other raw materials into the tank; S2: stirring rod for stirring; S3: After the mixing is completed, open the opening and closing plate to unload the material; In step S3, the driving assembly drives the rolling conveying body on the opening and closing plate to rotate.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The conical discharge part is blocked by the opening and closing plate to prevent the raw materials from entering the conical discharge part, thereby ensuring the mixing effect. The opening and closing plate is opened for discharge, and the driving component drives the rolling conveyor body to rotate, generating a conveying force on the concrete, thereby helping to improve the discharge efficiency; 2. The conveying direction of the conveying roller is upward, which can reduce the descending speed of the concrete on the opening and closing plate, so that the concrete in the middle of the tank can descend quickly, thereby improving the unloading efficiency and preventing blockage at the discharge port; 3. The sealing pad is overlapped on the conveying roller to increase the sealing area and ensure the sealing effect. When the opening and closing plate is closed and in the mixing state, the pressure of the concrete acts on the sealing pad. Due to the existence of the arc-shaped spring sheet, the contact force between the sealing pad and the conveying roller is increased, thereby improving the sealing effect. When the opening and closing plate is opened and in the unloading state, the conveying roller will rotate relative to the sealing pad. Since the bending point of the arc-shaped spring sheet is higher than the axis of the conveying roller, the conveying roller will not drive the sealing pad to move into the receiving port, thereby ensuring the reliability of the seal. 4. The conveying plate can increase the conveying area and conveying force, improve the blocking and retention effect on concrete, and through the cooperation between the abutment wheel and the cam, the conveying plate can avoid the sealing pad, that is, improve the unloading efficiency while ensuring sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present application; Figure 2 This is a partial structural diagram of Embodiment 1 of the present application, which mainly reflects the structure of the inclined guide plate and the vertical plate; Figure 3 This is a partial structural diagram of the first embodiment of the present application, which mainly reflects the structure of the conveying roller; Figure 4 This is a partial structural diagram of the first embodiment of the present application, which mainly reflects the structure of the driving assembly; Figure 5 This is a schematic cross-sectional view of a portion of the structure of the second embodiment of the present application, which mainly reflects the structure of the conveying plate; Figure 6 for Figure 5 A partial enlarged view of middle A.

[0026] 1. The tank body; 11. The inclined guide plate; 12. The vertical plate; 121. The inclined portion; 13. The discharge port; 14. The installation gap; 2. The stirring rod; 3. The opening and closing plate; 31. The accommodating port; 311. The sealing surface; 4. The square portion; 5. The conical discharge portion; 6. The driving assembly; 61. The first gear; 62. The second gear; 63. The third gear; 64. The driving motor; 7. The hydraulic cylinder; 8. The conveying roller; 81. The rotating sleeve; 9. The conveying plate; 91. The abutting rod; 92. The abutting wheel; 93. The abutting plate; 94. The compression spring; 10. The sealing gasket; 101. The arc-shaped spring piece; 20. The fixing rod; 30. The cam; 301. The protruding portion. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 -Attached Figure 6 This application is described in further detail.

[0028] The present application discloses a device for preparing recycled concrete.

[0029] Example 1 Reference Figure 1The preparation device and process of recycled concrete include a tank body 1, a stirring rod 2, an opening and closing plate 3 and a driving member. The upper side of the tank body 1 is cylindrical, the lower side of the tank body 1 is rectangular and forms a square portion 4, the tank body 1 is located in the square portion 4 to form a conical discharge portion 5, the stirring rod 2 is rotatably arranged on the upper side of the tank body 1, and the stirring rod 2 is driven by a motor to rotate; the opening and closing plate 3 is hinged in the square portion 4, located at the upper end of the conical discharge portion 5, two opening and closing plates 3 are provided and arranged oppositely, and the two opening and closing plates 3 are used to block the conical discharge portion 5.

[0030] In the initial state, the two opening and closing plates 3 are in a closed position. At this time, when raw materials are put into the tank body 1, the raw materials will be blocked by the opening and closing plates 3 and cannot enter the conical discharge part 5. This design ensures that the stirring rod 2 can fully mix all concrete during the stirring process, thereby improving the quality of the recycled concrete. After the stirring is completed, the opening and closing plates 3 are opened, and the recycled concrete is smoothly discharged through the conical discharge part 5, completing the discharge process.

[0031] A plurality of rolling conveyors are arranged on the opening and closing plate 3, and a driving assembly 6 for driving the rolling conveyors to rotate is arranged on the tank body 1. When the opening and closing plate 3 is opened for unloading, the rolling conveyors rotate.

[0032] After the mixing is completed, the opening and closing plate 3 is opened, and the recycled concrete is discharged from the conical discharge part 5 to complete the discharge. However, since the diameter of the discharge port 13 of the conical discharge part 5 gradually becomes smaller, it is easy to get blocked during the discharge process, resulting in a decrease in the discharge speed. At this time, the rotation of the rolling conveyor body can apply a conveying force to the recycled concrete, thereby effectively improving the discharge efficiency.

[0033] Reference Figure 1 and Figure 2 In the square portion 4, two inclined guide plates 11 are symmetrically installed on both sides of the tank body 1, and the lower ends of the two guide plates are retracted inward. In addition, two vertical plates 12 are symmetrically installed in the square portion 4 of the tank body 1. The two vertical plates 12 are respectively located at the ends of the inclined guide plates 11, and together with the inclined guide plates 11, they enclose a closed unloading area. The inclined guide plates 11 and the vertical plates 12 together form a conical unloading portion 5.

[0034] The lower side of the vertical plate 12 is formed with an inclined portion 121, which is connected to the lower end of the inclined guide plate 11, and together they are arranged to form a discharge port 13. The lower portion of the vertical plate 12 is designed as an inclined structure, and is connected to the lower end of the inclined guide plate 11, and together they form a discharge port 13 of smaller size, which is convenient for receiving materials from the bottom of the tank body 1. If the lower portion of the vertical plate 12 is kept vertical, the discharge port 13 will be in a long strip shape, which will put higher requirements on the receiving port of the 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.

[0035] 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, which is installed in the installation gap 14. The cylinder body of the hydraulic cylinder 7 is connected 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.

[0036] Reference Figure 1 and Figure 3 The rolling conveyor is provided as a conveying roller 8, and its conveying direction is upward in accordance with the inclination angle of the opening and closing plate 3. In actual operation, after the opening and closing plate 3 is rotated and opened, the concrete begins to be discharged, and the middle part thereof flows to the discharge port 13 in a vertical direction, while the concrete near the inner wall of the tank body 1 flows obliquely to the discharge port 13 along the opening and closing plate 3. This two-way flow may cause the concrete to accumulate at the discharge port 13, causing blockage and slowing down the discharge speed. By driving the conveying roller 8 to rotate and convey the concrete upward, the downward flow speed of the inner concrete can be reduced, and the squeezing can be alleviated, thereby speeding up the discharge speed of the concrete.

[0037] When the conveying roller 8 rotates, it not only generates an upward force on the concrete, but also generates a force to move the concrete toward the middle, thereby generating a downward thrust on the concrete in the middle, thereby accelerating the speed at which the concrete in the middle flows downward and improving the material discharge efficiency.

[0038] Reference 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 an accommodating port 31 for accommodating the conveying rollers 8, and the ends of the conveying rollers 8 are provided with a rotating sleeve 81, which is rotatably connected to the opening and closing plate 3 and extends to the inside of the opening and closing plate 3. The rotating sleeves 81 of all the conveying rollers 8 are synchronously rotated through the 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 to 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 in the installation gap 14, the driving motor 64 is installed on the inclined guide plate 11 and is located in the installation gap 14, and 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, the driving motor 64 is started, and the conveying rollers 8 are synchronously rotated through gear transmission. Correspondingly, the lower side of the opening and closing plate 3 and the inclined guide plate 11 are both provided with escape openings for avoiding the second gear 62 .

[0039] The opening and closing plate 3 is provided with a sealing surface 311 adapted to the surface shape of the conveying roller 8 in the inner direction of the receiving opening 31 , 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.

[0040] The implementation principle of a device for preparing recycled concrete in an embodiment of the present application is as follows: when the opening and closing plate 3 is closed, a mixing operation is performed, and at this time, the mixing rod 2 can fully mix the concrete, which is helpful to improve the quality of the recycled concrete; the opening and closing plate 3 is opened for unloading, and the conveying roller 8 rotates upward to reduce the descending 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 unloading, thereby effectively avoiding blockage and improving the unloading speed.

[0041] Example 2 Reference 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 of the conveying roller 8, and the conveying plates 9 rotate with the conveying roller 8 to enhance the blocking and retention effect of concrete and further improve the material discharge efficiency.

[0042] In addition, in this embodiment, due to the existence of the conveying plate 9, the gap between it and the receiving opening 31 is relatively large. If concrete enters the receiving opening 31, it will produce relatively large resistance to the rotation of the conveying plate 9. Therefore, in this embodiment, more effective sealing measures are required to prevent concrete from entering the sealing surface 311.

[0043] The opening and closing plate 3 is provided with curved sealing gaskets 10 on both sides of the receiving opening 31, and the free ends thereof cover the surface of the conveying roller 8, and the overlapping position is located above the axis of the conveying roller 8. The sealing gasket 10 is equipped with an arc-shaped spring piece 101, the center of curvature of which is located on the side away from the conveying roller 8, and the bending point of the arc-shaped spring piece 101 is higher than the axis of the conveying roller 8; the conveying plate 9 can be raised and lowered on the surface of the conveying roller 8, and when it moves to the sealing gasket 10, it descends to avoid contact with the sealing gasket 10. When the sealing gasket 10 overlaps the surface of the conveying roller 8, the arc-shaped spring piece 101 is in a bent state and deformed; under the action of the arc-shaped spring piece 101, the state of the sealing gasket 10 can be maintained, and the sealing gasket 10 can be prevented from bending inward under friction or pressure.

[0044] In this solution, the sealing pad 10 covers the surface of the conveying roller 8, expanding the sealing area. When the conveying roller 8 rotates, the conveying roller 8 rotates relative to the sealing pad 10. When the opening and closing plate 3 is closed, the pressure of the concrete acts on the sealing pad 10, increasing the contact force between the sealing pad 10 and the conveying roller 8, thereby enhancing the sealing effect. When the opening and closing plate 3 is open, the pressure of the concrete also acts on the upper sealing pad 10, continuing to maintain a strong sealing force, while the lower sealing pad 10 is blocked by the conveying roller 8, and the pressure of the concrete will not affect it, so the lower sealing pad 10 will not fail.

[0045] When the conveying roller 8 rotates and friction is generated between the upper sealing gasket 10, the sealing gasket 10 will be deformed, and the deformation tends to be in the direction of the sealing surface 311. However, because the bending point of the arc-shaped spring piece 101 is higher than the axis of the conveying roller 8, the bending point of the arc-shaped spring piece 101 is difficult to cross to the bottom of the axis of the conveying roller 8. Therefore, under the action of the arc-shaped spring piece 101, the more the sealing gasket 10 is deformed, the tighter the sealing force between the sealing gasket 10 and the conveying roller 8 is, thereby ensuring the sealing effect.

[0046] A fixing rod 20 is fixed on the opening and closing plate 3, and 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 protrusion 301 is formed on the cam 30. An abutment rod 91 is installed on one end of the conveying plate 9 located inside the conveying roller 8, and an abutment wheel 92 is rotatably connected to the abutment rod 91, and the abutment wheel 92 is always in contact with the cam 30. An abutment plate 93 and a compression spring 94 are also provided on the abutment rod 91. The compression spring 94 is sleeved on the abutment rod 91, one end of which is connected to the abutment plate 93, and the other end is connected to the inner wall of the conveying roller 8. When the abutment wheel 92 moves to the protrusion 301 of the cam 30, the conveying plate 9 extends out of the surface of the conveying roller 8 to block the conveying of concrete; when the abutment wheel 92 leaves the protrusion 301, the conveying plate 9 retracts under the action of the compression spring 94 to avoid contact with the sealing pad 10, thereby ensuring the sealing effect.

[0047] The present application also discloses a process for preparing recycled concrete, using any one of the preparation devices in the above two embodiments, comprising the following steps: S1: Close the opening and closing plate 3 and put the raw materials such as recycled aggregate, cement, water into the tank body 1; S2: stirring rod 2 for stirring; S3: After the stirring is completed, the opening and closing plate 3 is opened to unload the material.

[0048] In step S3, the driving assembly 6 synchronously drives the conveying roller 8 on the opening and closing plate 3 to rotate upward.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for preparing recycled concrete, characterized in that: The invention comprises a tank body (1), a stirring rod (2), an opening and closing plate (3), and a driving member for driving the opening and closing plate (3) to rotate. The tank body (1) is formed with a square portion (4) on the lower side. The tank body (1) is provided with a conical discharge portion (5) located in 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 rotate in the square portion (4). The two opening and closing plates (3) are located on the upper side of the conical discharge portion (5). A plurality of rolling conveying bodies are provided on the opening and closing plates (3). (1) is provided with a driving assembly (6) for driving a rolling conveying body to rotate, the rolling conveying body is a conveying roller (8), the driving assembly (6) comprises 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) is meshed with the third gear (63), the third gear (63) and the conveying roller (8) rotate coaxially, and when the opening and closing plate (3) is opened, the first gear (61) is meshed with the second gear (62).

2. The device for preparing recycled concrete according to claim 1, characterized in that: The tank body (1) is located in the square portion (4) and is symmetrically provided with two inclined guide plates (11), the lower ends of the two inclined guide plates (11) are in a retracted shape, and the tank body (1) is also symmetrically provided with two vertical plates (12) in the square portion (4), the two vertical plates (12) are located at the ends of the two inclined guide plates (11) and are surrounded by the inclined guide plates (11) to form a closed unloading area.

3. The device for preparing recycled concrete according to claim 2, characterized in that: An inclined portion (121) is formed on the lower side of the vertical plate (12), and the inclined portion (121) is connected to the lower end of the inclined guide plate (11), and together they surround a discharge port (13).

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

5. The device for preparing recycled concrete according to claim 1, characterized in that: The conveying direction of the conveying roller (8) is upward along the inclination direction of the opening and closing plate (3).

6. The device for preparing recycled concrete according to claim 5, characterized in that: The conveying rollers (8) are all rotatably arranged on the opening and closing plate (3); an accommodating opening (31) for accommodating the conveying rollers (8) is provided 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 via a pulley assembly to realize synchronous transmission; and the third gear (63) is coaxially fixed on one of the rotating sleeves (81).

7. The device for preparing recycled concrete according to claim 6, characterized in that: The conveying roller (8) has a plurality of conveying plates (9) distributed in a circumferential array.

8. The device for preparing recycled concrete according to claim 7, characterized in that: Sealing pads (10) are provided on both sides of the accommodating opening (31), and the sealing pads (10) are arranged in a curved shape. The free ends of the sealing pads (10) overlap the surface of the conveying roller (8), and the overlapping position is located on the upper side of the axis of the conveying roller (8). The sealing pad (10) is provided with an arc-shaped spring sheet (101) inside, and the center of curvature of the arc-shaped spring sheet (101) is located on the side away from the conveying roller (8); the conveying plate (9) is arranged to be lifted on the surface of the conveying roller (8), and when the conveying plate (9) moves to the sealing pad (10), it will descend to avoid the sealing pad (10).

9. The device for preparing recycled concrete according to claim 8, 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), a cam (30) is fixedly connected to the fixing rod (20), and a protrusion (301) is formed on the cam (30); an abutment rod (91) is provided at one end of the conveying plate (9) located inside the conveying roller (8), an abutment wheel (92) is rotatably connected to the abutment rod (91), the abutment wheel (92) is always in abutment with the cam (30), an abutment plate (93) is provided on the abutment rod (91), a compression spring (94) is sleeved on the abutment rod (91), one end of the compression spring (94) is connected to the abutment plate (93), and the other end of the compression spring (94) is connected to the inner wall of the conveying roller (8); when the abutment wheel (92) moves to the protrusion (301) of the cam (30), the conveying plate (9) extends out of the surface of the conveying roller (8).

10. A process for preparing recycled concrete, characterized in that: The preparation device according to any one of claims 1 to 9 comprises the following steps: S1: closing the opening and closing plate (3) and placing raw materials such as recycled aggregate, cement, and water into the tank body (1); S2: stirring rod (2) for stirring; S3: After the mixing is completed, the opening and closing plate (3) is opened to discharge the material; In step S3, the driving component (6) drives the rolling conveying body on the opening and closing plate (3) to rotate.

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