A pretreatment process for recycled aggregate from construction waste before adding it to concrete

Abstract

The present invention relates to the technical field of construction waste treatment, and specifically to a pretreatment process for construction waste recycled aggregate before adding it to concrete, comprising first pouring crushed block-shaped construction waste into a storage box; starting a screening motor to drive a screening drum located on the central axis of the storage box to rotate, and a screening track arranged on the inner wall of the screening drum spirally sends the block-shaped construction waste into the screening drum, and the block-shaped construction waste is lifted to a top port by a lifting drum plate and falls down; the block-shaped construction waste slides into a liquid storage tray through a material guide table and is soaked in slurry; then starting a material taking motor to drive a plurality of material taking groups connected end to end to flip in the liquid storage tray, and then the soaked block-shaped construction waste is removed from the liquid storage tray; finally, the collected construction waste is placed in a drying box for drying and solidification to form recycled aggregate, which can be added to concrete raw materials for mixing; that is, airtight block-shaped recycled aggregate is obtained, and the collapse of concrete caused by water absorption by the construction recycled aggregate is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of construction waste treatment, in particular to a pretreatment process for construction waste recycled aggregate before adding it into concrete. Background Art

[0002] Recycled aggregate from construction waste refers to aggregate with a nominal particle size of less than 40mm obtained through crushing of discarded concrete blocks generated from building demolition, road renovation, concrete production, construction projects, and other situations. This recycled aggregate can partially or completely replace natural aggregate to produce products such as recycled inorganic mixes, recycled bricks, and recycled concrete.

[0003] Recycled aggregate is divided into recycled coarse aggregate and recycled fine aggregate based on their nominal particle size. Recycled coarse aggregate is the result of crushing and processing discarded concrete blocks, with a nominal particle size greater than or equal to 5mm and less than 40mm. It can partially replace natural aggregate in concrete production.

[0004] However, due to the low strength of recycled aggregates and their high water absorption rate and many pores, if they are directly mixed into concrete raw materials, the high water absorption rate will cause the concrete to collapse. Therefore, before adding recycled aggregates to concrete, pretreatment measures are required to stabilize or avoid their water absorption characteristics. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of the present invention is to provide a pretreatment process for recycled aggregate from construction waste before adding it to concrete, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides a pretreatment process for recycled aggregate from construction waste before adding it to concrete, comprising the following steps:

[0007] S1. First pour the crushed and blocky construction waste into the storage box;

[0008] S2. Start the screening motor to drive the screening drum located on the central axis of the storage box to rotate. The screening track provided on the inner wall of the screening drum spirals the blocky construction waste into the screening drum, and the blocky construction waste is raised to the top port by the lifting drum plate and falls down.

[0009] S3, the fallen pieces of construction waste slide into the liquid storage tray through the material guide table and are soaked in the slurry;

[0010] S4, restarting the reclaiming motor to drive the multiple reclaiming groups connected end to end to flip over in the liquid storage tray, thereby removing the soaked block construction waste from the liquid storage tray;

[0011] S5. Finally, the collected construction waste is placed in a drying box for drying and solidification to form recycled aggregate, which can be added to the raw materials for concrete mixing;

[0012] The recycled aggregate is pre-processed by using a funnel-shaped storage box and a liquid storage tray placed directly below it. A lifting cylinder is provided on the central axis of the storage box. The lifting cylinder is a conical cylinder structure and its bottom surface is welded to the bottom surface of the storage box. An annular cavity structure with a larger top and a smaller bottom is formed between the storage box and the lifting cylinder. The liquid storage tray is an annular structure with an open top surface and a material guide platform is welded on its center hole. The material guide platform is sleeved with the inner cavity of the lifting cylinder without contact.

[0013] A screening mechanism is provided on the outside of the lifting cylinder, and the screening mechanism includes a screening cylinder covered on the outside of the lifting cylinder, a spiral screening track provided on the inner wall of the screening cylinder, and a screening motor; a feeding mechanism is provided on the inside of the liquid storage tray, and the feeding mechanism includes several feeding groups connected in a head-to-tail rotation manner and a feeding motor for driving the several feeding groups to rotate synchronously.

[0014] As a further improvement of the present technical solution, the bottom end of the screening track contacts and slides with the bottom surface of the storage box, the top end of the screening track is flush with the top surface of the lifting barrel, and the outer side of the screening track is welded to the inner wall of the screening barrel, the inner side of the screening track contacts and slides with the outer wall of the lifting barrel, and the screening track forms a spiral channel for lifting construction waste between the screening barrel and the lifting barrel, and a plurality of through holes are provided on the top surface of the screening track.

[0015] As a further improvement of this technical solution, a distance is left between the top of the screening cylinder and the lifting cylinder, and a discharge ring is welded at the top angle of the screening cylinder. The cross section of the discharge ring is triangular and its inclined surface faces the top of the lifting cylinder.

[0016] As a further improvement of this technical solution, a portal bracket is welded between the top and the outside of the storage box, the screening motor is fixedly connected to the center of the top surface of the portal bracket by bolts, and the top surface of the screening drum is fixedly connected to the bottom end of the output shaft of the screening motor by bolts.

[0017] As a further improvement of the technical solution, a plurality of paddle wheels are laterally inserted into the outer wall of the screening drum, and the lengths of the paddle wheels tend to gradually increase in the height direction of the screening drum.

[0018] As a further improvement of the present technical solution, the inner wall of the liquid storage tray is provided with a plurality of material dividing plates at equal intervals in a circular shape, and the outer wall of the material guide platform is provided with a plurality of material guide plates, and the bottom ends of the material guide plates are in contact with and welded to the material dividing plates.

[0019] As a further improvement of the present technical solution, a liquid storage cavity is provided in the bottom of the liquid storage tray, a liquid passage groove is provided on the top surface of the liquid storage cavity and between each adjacent two material distribution plates, and a liquid inlet groove connected to the liquid storage cavity is provided in the middle of the inner wall of the liquid storage tray and between each adjacent two material distribution plates.

[0020] As a further improvement of the present technical solution, the feeding group includes a rotating frame and several feeding plates. The rotating frame is composed of several flat frames welded at equal intervals on the central axis and its outer side surfaces. The feeding plates are plugged into the flat frames, and a spring is bonded between the inner end of the feeding plate and the inner end of the flat frame.

[0021] As a further improvement of the present technical solution, the material-taking mechanism includes a cross universal joint connected between the central axis ends of two adjacent rotating frames. The material dividing plate is circular and a pair of pipe sleeves are vertically welded on the two central side surfaces. The inner holes of the two pipe sleeves are connected, and the cross universal joint is placed in the pipe sleeves.

[0022] As a further improvement of the present technical solution, one of the material distribution plates is provided with an axle groove in the horizontal radial direction, and the axle groove is composed of an axial hole and a square hole that are vertically connected. The feeding motor is fixedly connected to the outer wall of the liquid storage tray by bolts, and its output shaft passes through the axial hole of the axle groove. An active bevel gear coaxially connected to the center axis of the feeding motor is inserted into the square hole of the axle groove, and a transmission bevel gear is tightly sleeved on one end of the rotating frame, wherein the transmission bevel gear close to the feeding motor is meshed with the active bevel gear.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The pretreatment process of the recycled aggregate from construction waste before adding it to concrete uses a storage box and a screening mechanism to screen out broken materials from the block materials in the storage box, allowing only the block materials to be removed, and a liquid storage tray is provided to catch the screened block materials, which are then coated and infiltrated with slurry, so that the gaps in the block materials are automatically filled with slurry to form a whole. The slurry is then solidified through drying or air-drying to obtain airtight block recycled aggregates, which can be mixed into concrete raw materials for mixing, thereby avoiding the collapse of concrete caused by water absorption by the recycled aggregates. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the drawings are merely illustrative and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances under the guidance of the present invention.

[0026] Figure 1It is a schematic diagram of the overall assembly structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall internal assembly structure of the present invention;

[0028] Figure 3 For the present invention Figure 2 The main view;

[0029] Figure 4 It is a schematic diagram of the structure of the material storage box and the screening mechanism of the present invention in a fully cross-section state;

[0030] Figure 5 For the present invention Figure 4 The main view;

[0031] Figure 6 This is a schematic diagram of the assembly structure of the screening mechanism of the present invention;

[0032] Figure 7 This is a disassembled diagram of the screening mechanism of the present invention;

[0033] Figure 8 This is a schematic diagram of the assembly structure of the material taking mechanism and the liquid storage tray of the present invention;

[0034] Figure 9 This is a schematic diagram of the assembly structure of the material taking mechanism of the present invention;

[0035] Figure 10 This is a partial exploded view of the material taking mechanism of the present invention;

[0036] Figure 11 It is a schematic diagram of the cross universal joint structure of the present invention;

[0037] Figure 12 It is a partial cross-sectional view of the liquid storage tray of the present invention.

[0038] The meaning of each number in the figure is:

[0039] 100, material storage box; 101, material lifting cylinder; 110, liquid storage tray; 111, material guide platform; 112, material distribution plate; 1121, pipe sleeve; 1122, axle groove; 113, material guide plate; 114, liquid storage chamber; 1141, liquid channel; 1142, liquid inlet tank;

[0040] 200, screening mechanism; 210, screening drum; 220, screening track; 230, screening motor; 240, discharge ring; 250, feeding wheel;

[0041] 300, feeding mechanism; 310, feeding group; 311, rotating frame; 312, feeding plate; 313, transmission bevel gear; 320, cross universal joint; 330, feeding motor; 331, driving bevel gear. DETAILED DESCRIPTION

[0042] The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explaining the present invention only and are not to be construed as limiting the present invention in any way. Based on the teachings of the present invention, skilled artisans can conceive of any possible variations based on the present invention, which should be considered to fall within the scope of the present invention. The terms "mounted" and "connected" should be understood broadly and can refer to direct connection or indirect connection through an intermediary.

[0043] The terms "central axis," "vertical," "horizontal," "front," "back," "up," "down," "left," "right," "top," "bottom," "inside," and "outside" used herein to indicate positions or location relationships are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, in the description of the present invention, "several" means two or more, unless otherwise specifically defined.

[0044] See also Figures 1-12 As shown, the present invention provides a pretreatment process for construction waste recycled aggregate before adding it to concrete, comprising the following steps:

[0045] S1, pouring the crushed and blocky construction waste into the storage box 100;

[0046] S2. Start the screening motor 230 to drive the screening drum 210 located on the central axis of the storage box 100 to rotate. The screening track 220 provided on the inner wall of the screening drum 210 spirals the blocky construction waste into the screening drum 210, and the blocky construction waste is lifted to the top port by the lifting drum 101 and falls down.

[0047] S3. The fallen pieces of construction waste slide through the guide platform 111 into the liquid storage tray 110 and are soaked in the slurry. The slurry is a bio-based glue, which is an adhesive made from natural materials and is environmentally friendly and biodegradable. It can solidify at room temperature and has strong adhesion, and can be used to bond recycled aggregates together. The slurry is a polymer material, such as a polymer, which is used to wrap the recycled aggregate to prevent water absorption. These materials can form a thin film on the surface of the aggregate, thereby reducing water absorption. In addition, these materials can also improve the wear resistance and corrosion resistance of the aggregate.

[0048] S4, restarting the retrieving motor 330 to drive the plurality of retrieving groups 310 connected end to end to flip in the liquid storage tray 110, thereby removing the soaked block construction waste from the liquid storage tray 110;

[0049] S5. Finally, the collected construction waste is placed in a drying box for drying and solidification to form recycled aggregate, which can be added to the raw materials of concrete for mixing.

[0050] The above-mentioned recycled aggregate is pretreated using a funnel-shaped storage box 100 and a liquid storage tray 110 placed directly below it, so that the recycled aggregate is wrapped with a layer of attachments, thereby forming a whole block that is impermeable and can be used as raw materials for concrete mixing; a lifting cylinder 101 is provided on the central axis of the storage box 100, and the lifting cylinder 101 is a conical cylinder structure and its bottom surface is welded to the bottom surface of the storage box 100 to form an integrated structure; an annular cavity structure with a larger top and a smaller bottom is formed between the storage box 100 and the lifting cylinder 101, which is used to store construction waste, wait for the block materials to be screened out and leave the crushed materials; the liquid storage tray 110 is an annular structure with an open top surface and a material guide platform 111 is welded on its center hole, which is sleeved with the inner cavity of the lifting cylinder 101 without contact, and the material guide platform 111 is a conical shell structure, which is used to guide the block materials falling from the top port of the lifting cylinder 101 to slide into the liquid storage tray 110 to be infiltrated with the cladding liquid to form a cladding body.

[0051] Specifically, a screening mechanism 200 is provided outside the lifting cylinder 101, and the screening mechanism 200 includes a screening cylinder 210 covered outside the lifting cylinder 101, a spiral screening track 220 provided on the inner wall of the screening cylinder 210, and a screening motor 230;

[0052] Furthermore, the bottom end of the screening track 220 contacts and slides with the bottom surface of the storage box 100, the top end of the screening track 220 is flush with the top surface of the lifting barrel 101, and the outer side of the screening track 220 is welded to the inner wall of the screening barrel 210, and the inner side of the screening track 220 contacts and slides with the outer wall of the lifting barrel 101. The screening track 220 forms a spiral channel for lifting construction waste between the screening barrel 210 and the lifting barrel 101, and a plurality of through holes are opened on the top surface of the screening track 220;

[0053] There is a gap between the sieve drum 210 and the top of the lifting drum 101, and a discharge ring 240 is welded at the top angle of the sieve drum 210. The cross section of the discharge ring 240 is triangular and its inclined surface faces the top of the lifting drum 101.

[0054] A gantry bracket is welded between the top and the outside of the storage box 100, and the screening motor 230 is fixedly connected to the center of the top surface of the gantry bracket by bolts, and the top surface of the screening drum 210 is fixedly connected to the bottom end of the output shaft of the screening motor 230 by bolts; the screening motor 230 is started to drive the screening drum 210 and the screening track 220 to rotate synchronously, and then the block material at the bottom of the storage box 100 is shoveled in by the bottom end of the screening track 220, and it spirals up along the screening track 220 and the outer wall of the lifting drum 101 until it is pushed to the top port of the lifting drum 101 by the inclined surface of the unloading ring 240 and falls down.

[0055] Furthermore, a plurality of feed wheels 250 are laterally inserted into the outer wall of the screening drum 210, and the length of the feed wheels 250 tends to gradually increase in the height direction of the screening drum 210; when the screening track 220 continuously rotates to remove the block materials at the bottom of the storage box 100, the block materials above it are bound to fall, and squeeze the plurality of feed wheels 250 to rotate, and then react to the plurality of block materials, playing a stirring role, avoiding the situation of accumulation and motionlessness, and ensuring that the screening track 220 continuously transports the block materials.

[0056] Specifically, a feeding mechanism 300 is provided inside the liquid storage tray 110. The feeding mechanism 300 includes a plurality of feeding groups 310 connected in a head-to-tail rotation manner and a feeding motor 330 for driving the plurality of feeding groups 310 to rotate synchronously; the feeding group 310 includes a rotating frame 311 and a plurality of feeding plates 312. The rotating frame 311 is composed of a central axis and a plurality of flat frames welded at equal intervals on its outer side. The feeding plates 312 are plugged into the flat frames, and a spring is bonded between the inner end of the feeding plate 312 and the inner end of the flat frame, so that the feeding plate 312 can be extended and retracted so as to adapt to the space of the liquid storage tray 110 during rotation, thereby ensuring that the block material is contacted and flipped out; a plurality of through holes are opened in a lattice pattern on the side of the feeding plate 312 so as to leak the slurry when the block material is pushed;

[0057] The material picking mechanism 300 includes a cross universal joint 320 connected between the central axis ends of two adjacent rotating frames 311. The cross universal joint 320 is a prior art technology, which can allow two different axes to rotate in the same direction and will not be described in detail here; the material dividing plate 112 is circular and has a pair of pipe sleeves 1121 vertically welded on both sides of its center. The inner holes of the two pipe sleeves 1121 are connected, and the cross universal joint 320 is placed in the pipe sleeve 1121, so that several material picking groups 310 connected end to end can flip in the same direction.

[0058] Furthermore, the inner wall of the liquid storage tray 110 is provided with a number of dividing plates 112 at equal intervals in a circular shape, and the outer wall of the guide platform 111 is provided with a number of guide plates 113. The outer sides of the guide plates 113 are close to the outer side of the lifting cylinder 101, forming a number of space channels for the block materials to slide down; the bottom ends of the guide plates 113 are in contact with and welded to the dividing plates 112, and are used to guide the fallen block materials to slide separately into the space separated by two adjacent dividing plates 112 in the liquid storage tray 110, so as to avoid the block materials from sliding together and piling up.

[0059] Furthermore, a liquid storage cavity 114 is provided in the bottom of the liquid storage tray 110 for storing cladding liquid; a liquid passage 1141 is provided on the top surface of the liquid storage cavity 114 and between each adjacent two material dividing plates 112 for injecting cladding liquid; a liquid inlet groove 1142 connected to the liquid storage cavity 114 is provided in the middle of the inner wall of the liquid storage tray 110 and between each adjacent two material dividing plates 112; when the block material is taken out by the material taking group 310, the excess cladding liquid can flow back into the liquid storage cavity 114 through the liquid inlet groove 1142.

[0060] It is worth noting that one of the material distribution plates 112 is provided with an axle groove 1122 in the horizontal radial direction, and the axle groove 1122 consists of an axial hole and a square hole that are vertically connected. The feeding motor 330 is fixedly connected to the outer wall of the liquid storage tray 110 by bolts, and its output shaft passes through the axial hole of the axle groove 1122, and an active bevel gear 331 coaxially connected to the central axis of the feeding motor 330 is inserted into the square hole of the axle groove 1122. One end of the rotating frame 311 is tightly fitted with a transmission bevel gear 313, wherein the transmission bevel gear 313 close to the feeding motor 330 is meshed with the active bevel gear 331; since the cross universal joint 320 is connected to a string of feeding groups 310, the feeding motor 330 drives the active bevel gear 331 to drive the transmission bevel gear 313 meshed with it to drive several feeding groups 310 to rotate in the same direction, thereby removing the liquid-containing block material from the liquid storage tray 110.

[0061] It should be noted that the above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit and substance of the present invention are intended to be encompassed within the scope of protection of the present invention.

Claims

1. A pretreatment process for recycled aggregate from construction waste before adding it to concrete, characterized in that: The following steps are involved: S1, pouring the crushed and blocky construction waste into a storage box (100); S2, starting the screening motor (230) to drive the screening drum (210) located on the central axis of the storage box (100) to rotate, and the screening track (220) provided on the inner wall of the screening drum (210) spirally feeds the massive construction waste into the screening drum (210), and the waste is raised to the top port by the lifting drum (101) and falls down; S3, the fallen pieces of construction waste slide into the liquid storage tray (110) through the material guide table (111) and are soaked in the slurry; S4, restarting the material taking motor (330) to drive the plurality of material taking groups (310) connected end to end to flip in the liquid storage tray (110), thereby removing the bulk construction waste after being soaked in the liquid from the liquid storage tray (110); S5. Finally, the collected construction waste is placed in a drying box for drying and solidification to form recycled aggregate, which can be added to the raw materials for concrete mixing; The recycled aggregate is pre-processed using a funnel-shaped storage box (100) and a liquid storage tray (110) placed directly below the storage box. A lifting cylinder (101) is provided on the central axis of the storage box (100). The lifting cylinder (101) is a conical cylinder structure and its bottom surface is welded to the bottom surface of the storage box (100). An annular cavity structure with a larger top and a smaller bottom is formed between the storage box (100) and the lifting cylinder (101). The liquid storage tray (110) is an annular structure with an open top surface and a material guide platform (111) is welded on its center hole. The material guide platform (111) is sleeved with the inner cavity of the lifting cylinder (101) without contact. A screening mechanism (200) is provided outside the lifting cylinder (101), and the screening mechanism (200) comprises a screening cylinder (210) covered outside the lifting cylinder (101), a spiral screening track (220) provided on the inner wall of the screening cylinder (210), and a screening motor (230); a material taking mechanism (300) is provided inside the liquid storage tray (110), and the material taking mechanism (300) comprises a plurality of material taking groups (310) connected in a head-to-tail rotation manner, and a material taking motor (330) for driving the plurality of material taking groups (310) to rotate synchronously.

2. The pretreatment process of construction waste recycled aggregate before adding to concrete according to claim 1, characterized in that: The bottom end of the screening track (220) contacts and slides with the bottom surface of the storage box (100), the top end of the screening track (220) is flush with the top surface of the lifting barrel (101), and the outer side of the screening track (220) is welded to the inner wall of the screening barrel (210), and the inner side of the screening track (220) contacts and slides with the outer wall of the lifting barrel (101). The screening track (220) forms a spiral channel for lifting construction waste between the screening barrel (210) and the lifting barrel (101), and the top surface of the screening track (220) is provided with a plurality of through holes.

3. The pretreatment process of construction waste recycled aggregate before adding it to concrete according to claim 2, characterized in that: A gap is left between the top of the screening cylinder (210) and the lifting cylinder (101), and a discharge ring (240) is welded at the top angle of the screening cylinder (210). The cross section of the discharge ring (240) is triangular and its inclined surface faces the top of the lifting cylinder (101).

4. The pretreatment process of construction waste recycled aggregate before adding it to concrete according to claim 3, characterized in that: A gantry bracket is welded between the top and the exterior of the storage box (100), the screening motor (230) is fixedly connected to the center of the top surface of the gantry bracket by means of bolts, and the top surface of the screening drum (210) is fixedly connected to the bottom end of the output shaft of the screening motor (230) by means of bolts.

5. The pretreatment process of construction waste recycled aggregate before adding to concrete according to claim 4, characterized in that: A plurality of paddle wheels (250) are laterally inserted into the outer wall of the screening cylinder (210), and the lengths of the paddle wheels (250) tend to gradually increase in the height direction of the screening cylinder (210).

6. The pretreatment process of construction waste recycled aggregate before adding it to concrete according to claim 5, characterized in that: The inner wall of the liquid storage tray (110) is provided with a plurality of material distribution plates (112) at equal intervals in a circular shape, and the outer wall of the material guide platform (111) is provided with a plurality of material guide plates (113), and the bottom ends of the material guide plates (113) are in contact with and welded to the material distribution plates (112).

7. The pretreatment process of recycled aggregate from construction waste before adding it to concrete according to claim 6, characterized in that: A liquid storage cavity (114) is provided in the bottom of the liquid storage tray (110), a liquid passage groove (1141) is provided on the top surface of the liquid storage cavity (114) and located between each two adjacent material distribution plates (112), and a liquid inlet groove (1142) connected to the liquid storage cavity (114) is provided in the middle of the inner wall of the liquid storage tray (110) and located between each two adjacent material distribution plates (112).

8. The pretreatment process of construction waste recycled aggregate before adding to concrete according to claim 7, characterized in that: The feeding group (310) includes a rotating frame (311) and a plurality of feeding plates (312). The rotating frame (311) is composed of a central axis and a plurality of flat frames welded at equal intervals on its outer side surfaces. The feeding plates (312) are plugged into the flat frames, and a spring is bonded between the inner ends of the feeding plates (312) and the inner ends of the flat frames.

9. The pretreatment process of construction waste recycled aggregate before adding to concrete according to claim 8, characterized in that: The material taking mechanism (300) includes a cross universal joint (320) connected between the central shaft ends of two adjacent rotating frames (311); the material dividing plate (112) is circular and has a pair of pipe sleeves (1121) vertically welded on the two side surfaces of the center; the inner holes of the two pipe sleeves (1121) are connected, and the cross universal joint (320) is placed in the pipe sleeves (1121).

10. The pretreatment process of recycled aggregate from construction waste before adding it to concrete according to claim 9, characterized in that: One of the material dividing plates (112) is provided with a wheel axle groove (1122) in a horizontal radial direction, and the wheel axle groove (1122) is composed of an axial hole and a square hole that are vertically connected. The material taking motor (330) is fixedly connected to the outer wall of the liquid storage tray (110) by bolts, and its output shaft penetrates the axial hole of the wheel axle groove (1122). A driving bevel gear (331) coaxially connected to the central axis of the material taking motor (330) is inserted into the square hole of the wheel axle groove (1122). One end of the rotating frame (311) is tightly sleeved with a transmission bevel gear (313), wherein the transmission bevel gear (313) close to the material taking motor (330) is meshed with the driving bevel gear (331).

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