Processing system and processing technology of recycled concrete

Abstract

This application relates to a processing system and process for recycled concrete, belonging to the field of concrete recycling. The recycled concrete processing system includes a shredding box for holding waste concrete blocks; a cutting and screening assembly disposed within the shredding box, used for shredding the concrete blocks by water jet and for screening the concrete fragments; a freezing box connected to the shredding box for freezing the concrete fragments, the freezing box being fixedly connected to a discharge plate, on which crushing rollers are disposed; an acidification box connected to the discharge plate for acidifying the crushed concrete; a grinding and drying assembly connected to the acidification box, used for grinding the acidified concrete and for drying the concrete simultaneously with grinding; and a new material box for mixing new material with the ground concrete. This application has the effect of facilitating the rapid recovery of reinforcing steel bars in waste concrete during the crushing process.

Description

Technical Field

[0001] This application relates to the field of concrete recycling, and in particular to a system and process for processing recycled concrete. Background Technology

[0002] Concrete is an important civil engineering material, widely used in the market due to its low price and abundant raw materials. To reduce the environmental pollution caused by waste concrete, it is generally recycled as one of the basic raw materials for new concrete.

[0003] Currently, waste concrete typically requires pretreatment using crushing and grinding equipment before being added back into new concrete, making it one of the basic aggregates for new concrete. For concrete crushing, jaw crushers or heavy hammer mills are generally used for initial dismantling, followed by crushing with crushing rollers, facilitating efficient crushing and recycling of waste concrete.

[0004] Waste concrete often contains embedded steel bars. While using a crusher and crushing rollers improves the crushing efficiency of waste concrete, it makes it difficult to quickly separate and recycle the steel bars. Summary of the Invention

[0005] In order to facilitate the rapid recycling of steel bars in waste concrete during the crushing process, this application provides a processing system and process for recycled concrete.

[0006] In a first aspect, this application provides a processing technology for recycled concrete, employing the following technical solution:

[0007] A process for processing recycled concrete includes the following steps:

[0008] S1: Water jet crushing: Water jets are used to cut and crush concrete blocks, separating the reinforcing bars from the concrete blocks, removing the reinforcing bars from the concrete, and breaking the concrete blocks into concrete fragments.

[0009] S2: Frozen concrete fragments: Cooling wet concrete fragments to below 0°C;

[0010] S3: Crushing with crushing rollers: The frozen concrete fragments are crushed by crushing rollers;

[0011] S4: Acidification treatment: Acidification treatment of broken concrete using acidic liquid;

[0012] S5: Grinding and Drying: Grinding the acidified concrete and drying it with heat at the same time;

[0013] S6: Preparation of new concrete: Mix the ground concrete with new materials to prepare new concrete.

[0014] By adopting the above technical solution, waste concrete is initially crushed using water jets. Since water jets cannot easily crush the reinforcing steel while crushing the concrete, the reinforcing steel is more likely to remain intact and less likely to mix into the crushed concrete, thus facilitating the rapid recycling of the reinforcing steel from the concrete. The concrete fragments crushed by water jets are then frozen and further crushed, making the concrete fragments easier to crush thoroughly and improving the degree of crushing. The crushed concrete is then acidified and ground, and dried during the grinding process, allowing the waste concrete to be reprocessed as one of the basic raw materials for new concrete, thereby enabling the waste concrete to be recycled and increasing its utilization value.

[0015] Secondly, this application provides a processing system for recycled concrete, which adopts the following technical solution:

[0016] A system for processing recycled concrete, applicable to the aforementioned process for processing recycled concrete, comprising:

[0017] Shredders are used to hold waste concrete blocks;

[0018] A cutting and screening assembly is disposed on the chopping box. The cutting and screening assembly is used to chop concrete blocks by water jet and to screen concrete fragments.

[0019] A freezing chamber, connected to the chopping chamber, is used to freeze concrete fragments. The freezing chamber is fixedly connected to a discharge plate, and a crushing roller is provided on the discharge plate.

[0020] An acidification tank, connected to the discharge plate, is used to acidify the crushed concrete.

[0021] The grinding and drying assembly is connected to the acidification box. The grinding and drying assembly is used to grind the acidified concrete and to dry the concrete at the same time as grinding.

[0022] The new material bin is used to mix new materials with ground concrete.

[0023] By adopting the above technical solution, concrete blocks are placed in a shredding box, where they are shredded into concrete fragments by a sieving assembly. Simultaneous sieving allows for the separation of reinforcing steel bars during the shredding process via water jets, facilitating the rapid recovery of the steel bars from the concrete crushing process. The shredded concrete fragments are then frozen, crushed, acidified, ground, and dried using a freezing box, crushing rollers, acidification box, and grinding / drying assembly. This process reprocesses the waste concrete into one of the basic raw materials for new concrete. The new material is then mixed with the ground concrete in a new material box, thus completing the recycling of waste concrete and facilitating the rapid recovery of reinforcing steel bars during the recycling process.

[0024] Optionally, the chopping box has multiple chopping holes along both the circumferential and axial directions, and the screen assembly includes:

[0025] The chopping section includes multiple nozzles that correspond one-to-one with the chopping holes and are slidably disposed at the chopping holes. All the nozzles are connected to a booster pump through a pipe. The booster pump is connected to a first water pump through a pipe. The first water pump is connected to a water tank, which is filled with water.

[0026] A screening section is located inside the chopping box and is used for vibrating screening of chopped concrete fragments;

[0027] A swinging part is disposed outside the chopping box and is used to drive all the nozzles to slide back and forth along the circumference of the chopping box.

[0028] By adopting the above technical solution, the first water pump pressurizes the water in the water tank and pumps it into the booster pump. The booster pump pressurizes the water and sprays it out from all the nozzles. The pressurized water impacts the waste concrete block in the form of a water jet, causing the waste concrete block to break under the impact of the water jet. At the same time, the steel bars are separated from the concrete. The screening section screens the concrete fragments, and the swing section drives all the nozzles to swing, expanding the spray range of the nozzles on the concrete block. With the assistance of the screening section and the swing section, the water jet from the nozzles can easily cut and screen the concrete block.

[0029] Optionally, the top of the chopping box is covered with a cover plate made of permanent magnet. A lifting cylinder is provided between the cover plate and the outer wall of the chopping box. The lifting cylinder is fixedly connected to the chopping box, and its movable end is fixedly connected to the cover plate. A three-way valve is provided on the pipeline between the booster pump and the first water pump. The three-way valve includes two outlets and one inlet. The inlet of the three-way valve is connected to the first water pump. One outlet of the three-way valve is connected to the booster pump, and the other outlet is connected to the lifting cylinder. A drain valve is provided on the lifting cylinder, and the drain valve is connected to the water tank.

[0030] By adopting the above technical solution, the water flow direction of the first water pump can be easily controlled by adjusting the outlet of the three-way valve. When the nozzle needs to spray and chop, the inlet of the three-way valve is connected to the outlet of the booster pump. After chopping is completed, the inlet of the three-way valve is connected to the outlet of the lifting cylinder, so that the movable end of the lifting cylinder extends out. The lifting cylinder drives the cover plate to move, and the cover plate uses magnetic force to attract the steel bars to itself, so that the steel bars can be easily removed from the chopping box. When the lifting cylinder needs to be reset, the drain valve is opened to allow the water in the lifting cylinder to flow back into the water tank, so that the cover plate can be easily reset under the action of gravity.

[0031] Optionally, the screening section includes a screen slidably connected to the chopping box, a plurality of eccentric wheels located below the screen, and a drive water pipe for driving the eccentric wheels to rotate. The eccentric wheels are fixedly connected to a drive shaft, which rotatably passes through the chopping box. The end of the drive shaft closest to the connecting pipe between the first water pump and the booster pump, away from the eccentric wheel, rotatably passes through the connecting pipe between the first water pump and the booster pump and is coaxially fixedly connected to a drive water wheel. The drive water wheel is located in the connecting pipe between the first water pump and the booster pump. The drive water pipe is annular and located between the eccentric wheels and the inner sidewall of the chopping box. The plurality of drive shafts all pass through the drive water pipe. The portion of the drive shaft located inside the drive water pipe is coaxially fixedly connected to a vibrating water wheel. The drive water pipe is also filled with water.

[0032] By adopting the above technical solution, the first water pump draws water into the pipeline, and the water flow impacts the drive water wheel. The drive water wheel drives the drive shaft to rotate, and the drive shaft drives the eccentric wheel to rotate. During the rotation, the eccentric wheel circulates and pushes the screen to slide. The drive shaft connected to the drive water wheel synchronously drives the vibrating water wheel to rotate. The vibrating water wheel drives the water in the drive pipe to circulate. The water in the drive pipe drives the vibrating water wheels on the other drive shafts to rotate. The other vibrating water wheels drive the eccentric wheels connected to them to rotate, so that the screen can be stably vibrated and screened under the circulatory push of multiple eccentric wheels.

[0033] Optionally, multiple sets of the swinging parts are provided, each corresponding to one of the drive shafts. The drive unit includes a fixed frame that is fixedly connected to all the nozzles and rotatably sleeved on the chopping box, a drive block for driving the fixed frame to slide back and forth, and a reciprocating screw threaded through the drive block. The reciprocating screw is rotatably connected to the chopping box and connected to the drive shaft through a bevel gear transmission. The fixed frame has a sliding groove that is angled with the reciprocating screw. A slider that is slidably disposed in the sliding groove is fixedly connected to the side of the drive block near the fixed frame.

[0034] By adopting the above technical solution, the drive shaft drives the reciprocating screw to rotate through bevel gear transmission. The reciprocating screw drives the drive block to move back and forth along the axis of the reciprocating screw. The drive block drives the slider to move. The slider drives the fixed frame to rotate back and forth through the sliding connection with the slide groove. This makes it easy for the fixed frame to follow the spray of the nozzle and rotate back and forth, and reduces the number of power sources.

[0035] Optionally, the bottom of the freezer is slidably provided with a discharge box adapted to itself. The top and bottom of the discharge box are both open. A baffle plate is fixedly connected to the top of the end of the discharge box in the sliding direction. The baffle plate is adapted to the freezer. The discharge plate is located at the end of the discharge box away from the baffle plate and is inclined in the direction away from the discharge box towards the direction away from the baffle plate.

[0036] By adopting the above technical solution, the shredded concrete fragments are transferred to the freezing chamber, where the wet concrete fragments are frozen. Then, a sliding baffle plate is circulated, which pushes the discharge box out of the freezing chamber. This allows the concrete fragments at the bottom of the freezing chamber to move to the discharge plate along with the discharge box. At the same time, the baffle plate prevents the remaining concrete fragments in the freezing chamber from falling into the space after the discharge box slides out of the freezing chamber. Thus, by circulating the sliding baffle plate, the frozen concrete fragments at the bottom of the freezing chamber are easily transferred out of the freezing chamber, and the concrete fragments in the freezing chamber are easily discharged according to the freezing time.

[0037] Optionally, a stirring shaft is coaxially rotatably connected inside the acidification tank, and a drive box is rotatably connected to the top end of the stirring shaft. The stirring shaft passes through the drive box, and a stirring impeller is coaxially fixedly connected to one end of the stirring shaft located inside the drive box. A first stirring plate is fixedly connected to the stirring shaft. One side of the drive box is connected to an acid liquid pipe, and the other side is open. The acid liquid pipe is connected to a second water pump, and the second water pump is connected to an acid liquid tank, which contains acid liquid.

[0038] By adopting the above technical solution, the second water pump pressurizes the acid in the acid tank and pumps it into the acid pipe. The acid flows along the acid pipe into the drive box and impacts the stirring impeller. The acid drives the stirring impeller to rotate, the stirring impeller drives the stirring shaft to rotate, and the stirring shaft drives the first stirring plate to rotate. The acid flows from the drive box into the acidification tank, and the first stirring plate mixes the acid with the crushed concrete evenly, thus making it easier for the acid to drive the concrete to mix with itself.

[0039] Optionally, a driving water wheel is provided inside the acid pipe near the baffle plate. The driving water wheel is coaxially fixedly connected to a driving disk. The driving disk is located outside the acid pipe. A driving rod is hinged between the driving disk and the baffle plate. The driving disk, the driving rod, and the baffle plate form a crank-slider mechanism.

[0040] By adopting the above technical solution, the acid flows from the acid pipe to the drive box and first passes through the push water wheel. The push water wheel rotates under the impact of the acid, which drives the drive disc to rotate. The drive disc drives the drive rod to swing, and the drive rod pushes the baffle plate to slide. Thus, the acid can drive the baffle plate to slide at the same time as driving the stirring shaft to rotate.

[0041] Optionally, the grinding and drying assembly and the new material box are located sequentially at the end of the acidification box away from the drive box. The grinding and drying assembly includes a grinding block and an auxiliary grinding block. The grinding block is fixedly connected to the stirring shaft, the auxiliary grinding block is fixedly connected to the acidification box, and the new material box is fixedly connected to the auxiliary grinding block. The stirring shaft extends into the new material box, and a second stirring plate is fixedly connected to the part located inside the new material box.

[0042] By adopting the above technical solution, the stirring shaft drives the grinding block and the second stirring plate to rotate synchronously when rotating, so that the grinding block and the second stirring plate do not require an additional driving source, and the acidification stirring, grinding and new material stirring can be carried out simultaneously, making the continuity of the processing technology more stable.

[0043] In summary, this application includes at least one of the following beneficial technical effects:

[0044] 1. The nozzle uses water jets to shred waste concrete blocks, while minimizing the impact on steel reinforcement, thus facilitating the rapid recycling of steel reinforcement within the waste concrete.

[0045] 2. When the nozzle is spraying water, the water flow in the pipeline connecting the first water pump and the booster pump can drive the drive water wheel to rotate. The drive water wheel drives the eccentric wheel to rotate cyclically through the drive shaft. Thus, the eccentric wheel can make the screen vibrate cyclically, so that the concrete fragments can be screened simultaneously during the crushing process.

[0046] 3. The acid flows from the acid pipe into the drive box. The acid drives the water wheel and the stirring impeller to rotate. The water wheel drives the discharge box to discharge through the crank-slider mechanism formed by the drive disc, drive rod and baffle plate. The stirring impeller drives the first stirring plate to rotate through the stirring shaft. Thus, the discharge of the discharge box and the mixing of acid and concrete can be driven by the flow of acid. Attached Figure Description

[0047] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0048] Figure 2 This is a schematic diagram intended to illustrate the structure of the shredder.

[0049] Figure 3 This is a cross-sectional view intended to illustrate the screening section;

[0050] Figure 4 yes Figure 3 Enlarged view at point A in the middle;

[0051] Figure 5 yes Figure 3 Enlarged view at point B;

[0052] Figure 6 It is a cross-sectional view intended to illustrate the freezer.

[0053] Figure 7 It is a cross-sectional view intended to illustrate the acidification chamber and grinding assembly;

[0054] Figure 8 This is a schematic diagram illustrating the driving relationship between the acid pipe and the baffle plate;

[0055] Figure 9 yes Figure 8 A magnified view of point C in the middle.

[0056] Explanation of reference numerals in the attached figures:

[0057] 1. Shredding box; 11. Shredding hole; 12. Cover plate; 13. Lifting cylinder; 131. Drain valve; 2. Screening assembly; 21. Shredding section; 211. Nozzle; 212. Booster pump; 213. First water pump; 214. Water tank; 215. Three-way valve; 22. Screening section; 221. Screen; 222. Eccentric wheel; 2221. Drive shaft; 2222. Drive water wheel; 223. Drive water pipe; 2231. Vibrating water wheel; 23. Swinging part; 231. Fixing frame; 2311. Slide groove; 232. Drive block; 2321. Slider; 233. Reciprocating screw 3. Freezing box; 31. Discharge plate; 32. Crushing roller; 33. Discharge box; 34. Baffle plate; 35. Freezing pipe; 4. Acidification box; 41. Stirring shaft; 411. First stirring plate; 412. Stirring impeller; 42. Drive box; 43. Acid pipe; 431. Drive wheel; 432. Drive disc; 433. Drive rod; 44. Second water pump; 45. Acid tank; 46. Feed plate; 47. Slide rail; 5. Grinding and drying assembly; 51. Grinding block; 52. Auxiliary grinding block; 53. Heating wire; 6. New material box; 61. Second stirring plate; 62. New material pipe; 7. Frame. Detailed Implementation

[0058] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0059] This application discloses a processing technology for recycled concrete.

[0060] A process for processing recycled concrete includes the following steps:

[0061] S1: Water jet crushing: Water jets are used to cut and crush concrete blocks, separating the reinforcing bars from the concrete blocks, removing the reinforcing bars from the concrete, and breaking the concrete blocks into concrete fragments.

[0062] S2: Frozen concrete fragments: Cooling wet concrete fragments to below 0°C;

[0063] S3: Crushing with crushing rollers: The frozen concrete fragments are crushed by crushing rollers;

[0064] S4: Acidification treatment: Acidification treatment of broken concrete using acidic liquid;

[0065] S5: Grinding and Drying: Grinding the acidified concrete and drying it with heat at the same time;

[0066] S6: Preparation of new concrete: Mix the ground concrete with new materials to prepare new concrete.

[0067] During processing, water jets are used to shred concrete blocks, separating the concrete from the reinforcing steel. This allows the reinforcing steel within the concrete to be quickly recycled. The shredded concrete fragments are then frozen, crushed, acidified, ground, and dried in sequence, making the concrete one of the basic raw materials for new concrete. This enables waste concrete to be recycled into new concrete, thus increasing the utilization value of waste concrete.

[0068] This application also discloses a recycled concrete processing system, applicable to the above-described recycled concrete processing technology.

[0069] Reference Figure 1 A recycled concrete processing system includes a shredding box 1 for holding concrete blocks, a sieve assembly 2 for shredding concrete blocks by water jet, a freezing box 3 for freezing concrete fragments, an acidification box 4 for acidifying concrete, a grinding and drying assembly 5 for grinding and drying concrete, a new material box 6 for preparing new concrete, and a frame 7. The shredding box 1, freezing box 3, acidification box 4, grinding and drying assembly 5, and new material box 6 are all mounted on the frame 7 and connected in sequence. The sieve assembly 2 is mounted on the shredding box 1, and a crushing roller 32 is provided between the freezing box 3 and the acidification box 4.

[0070] In use, concrete blocks are placed into the chopping box 1, and the chopping and screening component 2 uses water jets to chop and screen the concrete blocks. The chopped concrete fragments are then transferred to the freezing box 3, where the concrete fragments are frozen. The crushing roller 32 crushes the frozen concrete fragments. The crushed concrete is then acidified in the acidification box 4, and the acidified concrete is then ground and dried in the grinding and drying component 5. The ground concrete is then used as one of the basic raw materials for new concrete in the new material box 6, thus making it easy to recycle waste concrete and to quickly recover steel bars during the crushing process.

[0071] Reference Figure 2 The chopping box 1 is cylindrical and vertically arranged. It is fixedly connected to the frame 7 and has a cover plate 12 on its top. The cover plate 12 is cylindrical and horizontally arranged. It fits the chopping box 1 and is coaxial with it. The cover plate 12 is made of permanent magnet. A vertically arranged lifting cylinder 13 is fixedly connected to the outer wall of the chopping box 1. The movable end of the lifting cylinder 13 is fixedly connected to the cover plate 12. The lifting cylinder 13 extends and retracts in a vertically upward direction.

[0072] The side wall of the chopping box 1 is provided with multiple chopping holes 11 along the circumferential and axial directions. The chopping holes 11 are rectangular and penetrate through the wall thickness of the chopping box 1. The length direction of the chopping holes 11 is parallel to the circumferential direction of the chopping box 1.

[0073] Reference Figure 2 and Figure 3 The cutting and screening assembly 2 includes a chopping section 21, a screening section 22, and a swing section 23. The chopping section 21 includes multiple nozzles 211, which are divided into two groups. One group of nozzles 211 is located on the side wall of the chopping box 1, and the other group of nozzles 211 is located on the cover plate 12. The two groups of nozzles 211 are connected to a booster pump 212 through a hose. The booster pump 212 is connected to a first water pump 213 through a pipe. The first water pump 213 is connected to a water tank 214 through a pipe. The water tank 214 is filled with water. The water tank 214, the first water pump 213, and the booster pump 212 are all fixedly connected to the frame 7.

[0074] Reference Figure 2 A three-way valve 215 is installed between the first water pump 213 and the booster pump 212. The three-way valve 215 includes one inlet and two outlets. The inlet of the three-way valve 215 is connected to the first water pump 213, one outlet of the three-way valve 215 is connected to the booster pump 212, and the other outlet is connected to the bottom of the lifting cylinder 13 through a pipe. A drain valve 131 is installed at the bottom of the lifting cylinder 13, and the drain valve 131 is connected to the water tank 214 through a pipe.

[0075] Both sets of nozzles 211 are provided with multiple nozzles. The nozzles 211 provided on the side wall of the chopping box 1 correspond one-to-one with the chopping holes 11. The nozzles 211 are slidably provided in the chopping holes 11, and the sliding direction is along the circumference of the chopping box 1. The multiple nozzles 211 provided on the cover plate 12 are arranged in a matrix and are all fixedly installed on the cover plate 12. The nozzles 211 are in communication with the inside of the chopping box 1.

[0076] Reference Figure 3 The screening section 22 includes a screen 221 slidably disposed inside the chopping box 1, a plurality of eccentric wheels 222 located below the screen 221, and a drive water pipe 223 for driving the eccentric wheels 222 to rotate. The screen 221 is horizontally disposed and adapted to the chopping box 1. The screen 221 is located at the bottom of the chopping box 1 and slides in a vertical direction.

[0077] Multiple eccentric wheels 222 are evenly distributed around the axis of the chopping box 1. A drive shaft 2221 is fixedly connected to the edge of the eccentric wheel 222. The axis of the drive shaft 2221 is parallel to the axis of the eccentric wheel 222. The drive shaft 2221 passes through the side wall of the chopping box 1 and is rotatably connected to the chopping box 1.

[0078] Reference Figure 2 and Figure 3 The drive shaft 2221, which is close to the connecting pipe between the first water pump 213 and the three-way valve 215, passes through the connecting pipe between the first water pump 213 and the three-way valve 215 and is rotatably connected to the connecting pipe.

[0079] Reference Figure 2 and Figure 4 The drive shaft 2221 is located in the connecting pipe between the first water pump 213 and the three-way valve 215, and one end is coaxially fixedly connected to the drive water wheel 2222.

[0080] Reference Figure 3 and Figure 4 The drive water pipe 223 is circular and has a circular cross-section along its extension direction. The drive water pipe 223 is located inside the chopping box 1 and is adapted to the chopping box 1. The drive water pipe 223 is located between the eccentric wheel 222 and the inner wall of the chopping box 1. The drive shaft 2221 passes through the drive water pipe 223 and is rotatably connected to the drive water pipe 223. The part of the drive shaft 2221 located inside the drive water pipe 223 is coaxially fixedly connected to the vibrating water wheel 2231. The drive water pipe 223 is also filled with water.

[0081] Reference Figure 2 and Figure 3Multiple swing parts 23 are provided, and each one corresponds to the drive shaft 2221. The swing part 23 includes a fixed frame 231 rotatably sleeved on the outer wall of the chopping box 1, a drive block 232 for driving the fixed frame 231 to reciprocate, and a reciprocating screw 233 threaded through the drive block 232. The fixed frame 231 is cylindrical frame-shaped, and the inner side of the fixed frame 231 is fixedly connected to all the nozzles 211 provided on the side wall of the chopping box 1.

[0082] Reference Figure 3 The reciprocating screw 233 is vertically arranged, and its bottom end is connected to the drive shaft 2221 through bevel gear transmission. The reciprocating screw 233 is rotatably connected to the chopping box 1.

[0083] Reference Figure 2 and Figure 5 The fixed frame 231 has a sliding groove 2311 near the drive block 232. The sliding groove 2311 is rectangular and its length direction is set at an angle to the axis of the reciprocating screw 233. The drive block 232 is rectangular and a cylindrical slider 2321 is fixedly connected to one side near the fixed frame 231. The slider 2321 is slidably disposed in the sliding groove 2311.

[0084] In use, concrete blocks are placed into the chopping box 1, the first water pump 213 is started, and the inlet of the three-way valve 215 is adjusted to connect with the outlet of the booster pump 212. The first water pump 213 pressurizes water and draws it into the booster pump 212, which in turn pressurizes the water and supplies it to the nozzles 211. Both the nozzles 211 on the chopping box 1 and the nozzles 211 on the cover plate 12 use water jets to chop the concrete blocks. Under the impact of the water jets, the concrete blocks are gradually chopped into concrete fragments. The steel bars are separated from the concrete. The steel bars are attracted to the cover plate 12 by the magnetic attraction of the cover plate 12. After the concrete is crushed, the inlet of the three-way valve 215 is connected to the outlet of the lifting cylinder 13. The first water pump 213 draws water into the lifting cylinder 13. Under the action of water pressure, the movable end of the lifting cylinder 13 extends and drives the cover plate 12 to move upward, so that the cover plate 12 can move the steel bars out of the crushing box 1, thereby making it easy to quickly recover the steel bars during the process of crushing concrete.

[0085] When the first water pump 213 supplies water to the booster pump 212 through the three-way valve 215, the pressurized water flow impacts the drive water wheel 2222. The drive water wheel 2222 drives the drive shaft 2221 to rotate. The drive shaft 2221 drives the eccentric wheel 222 and the vibrating water wheel 2231 connected to it to rotate. The vibrating water wheel 2231 drives the water in the drive water pipe 223 to circulate. The water flow in the drive water pipe 223 drives the other vibrating water wheels 2231 to rotate. The vibrating water wheel 2231 drives the eccentric wheel 222 connected to it to rotate. Thus, under the drive of the drive water wheel 2222, multiple eccentric wheels 222 rotate in a cycle. Multiple eccentric wheels 222 circulate and push the screen 221 to slide, so that the screen 221 can screen concrete fragments with the spray of the nozzle 211. At the same time, under the action of the nozzle 211 on the cover plate 12, the screen 221 is not easy to get clogged.

[0086] When the drive shaft 2221 rotates, it drives the reciprocating screw 233 to rotate through the bevel gear transmission. The reciprocating screw 233 drives the drive block 232 to move back and forth in the vertical direction. The drive block 232 drives the fixed frame 231 to rotate back and forth through the engagement of the slider 2321 and the slide groove 2311. The fixed frame 231 drives the nozzle 211 set on the chopping box 1 to slide back and forth, which expands the spray range of the nozzle 211 on the chopping box 1, thereby making it easier to chop the concrete block evenly and thoroughly.

[0087] Reference Figure 1 and Figure 6 The freezer 3 is rectangular and vertically positioned below the chopping box 1 on one side, with an open top. The bottom of the chopping box 1 is connected to the top of the freezer 3 via a conveyor belt. The freezer 3 is fixedly connected to the frame 7. A spiral freezing tube 35 is fitted on the outer wall of the freezer 3, and refrigerant flows inside the freezing tube 35.

[0088] The bottom of the freezer 3 is provided with a discharge box 33. The discharge box 33 is rectangular and horizontal. The top and bottom of the discharge box 33 are open. The discharge box 33 slides towards or away from the chopping box 1.

[0089] A baffle plate 34 is fixedly connected to the top of the discharge box 33 near the chopping box 1. The baffle plate 34 is rectangular and horizontally arranged, and is adapted to the freezing box 3. A discharge plate 31 is fixedly connected to the bottom of the freezing box 3 on the side away from the chopping box 1. The discharge plate 31 is rectangular and is inclined vertically downward along the direction away from the freezing box 3.

[0090] Reference Figure 6There are three crushing rollers 32, all located on the top surface of the discharge plate 31. The three crushing rollers 32 are arranged in a direction away from the discharge plate 31. The crushing rollers 32 are rotatably connected to the frame 7, and there is a gap between two adjacent crushing rollers 32.

[0091] In use, the concrete fragments screened by the screen 221 are transferred to the freezing chamber 3 by the conveyor belt. The freezing chamber 3 freezes the wet concrete fragments with the freezing liquid in the freezing pipe 35. The sliding baffle 34 is circulated and pushes the discharge box 33 out of the freezing chamber 3. As the discharge box 33 slides out of the freezing chamber 3, it drives the concrete fragments inside to move onto the discharge plate 31 and slides along the discharge plate 31 to the crushing roller 32. The crushing roller 32 is rotated and crushes the frozen concrete fragments, so that the wet concrete fragments are easy to crush after freezing.

[0092] Reference Figure 1 and Figure 7 The acidification tank 4 is a circular box-shaped structure, vertically installed, and fixedly connected to the frame 7. Both its top and bottom ends are open, with the top of the acidification tank 4 located directly below the bottom of the discharge plate 31. A stirring shaft 41 is coaxially mounted inside the acidification tank 4, and is rotatably connected to it. Multiple rectangular first stirring plates 411 are fixedly connected to the stirring shaft 41 within the acidification tank 4, and these first stirring plates 411 are arranged along the circumference and axial direction of the stirring shaft 41.

[0093] Reference Figure 7 and Figure 8 A stirring impeller 412 is coaxially fixedly connected to the top end of the stirring shaft 41, and a circular box-shaped drive box 42 is coaxially rotatably connected to it. The stirring impeller 412 is located inside the drive box 42. One side of the drive box 42 is connected to an acid pipe 43, and the other side is open. The acid pipe 43 is connected to a second water pump 44, and the second water pump 44 is connected to an acid tank 45. The acid tank 45 contains acid. The acid pipe 43, the second water pump 44, and the acid tank 45 are all fixedly connected to the frame 7.

[0094] Reference Figure 7 The bottom end of the stirring shaft 41 extends out of the bottom end of the acidification tank 4. A feed plate 46 is connected to the part of the stirring shaft 41 opposite to the bottom of the acidification tank 4 via a reciprocating thread. The feed plate 46 is horizontally arranged and circular in shape. The stirring shaft 41 passes through the feed plate 46 and is coaxial with it. The feed plate 46 is adapted to the acidification tank 4 and is slidably connected to it in the vertical direction. Multiple vertically arranged slide rails 47 are fixedly connected to the bottom end of the acidification tank 4. The slide rails 47 are arranged around the axis of the acidification tank 4, and the feed plate 46 is also slidably connected to the slide rails 47 in the vertical direction.

[0095] Reference Figure 8 and Figure 9 A push water wheel 431 is provided inside the acid pipe 43 near the baffle plate 34. The shaft of the push water wheel 431 passes through the acid pipe 43 and is rotatably connected to the acid pipe 43. The axis of rotation of the push water wheel 431 is set horizontally and perpendicular to the axis of the acid pipe 43.

[0096] A drive disc 432 is coaxially fixedly connected to the water turbine 431 via a rotating shaft. The drive disc 432 is a circular plate located outside the acid pipe 43. A rectangular rod-shaped drive rod 433 is hinged between the side of the drive disc 432 away from the acid pipe 43 and the end of the baffle plate 34 away from the discharge box 33. The hinge point between the drive rod 433 and the drive disc 432 is located at the edge of the drive disc 432. The drive disc 432, drive rod 433, and baffle plate 34 together form a crank-slider mechanism. The rotating shaft of the water turbine 431 is connected to the crushing roller 32 located in the middle of the three crushing rollers 32 via a two-stage belt drive.

[0097] During operation, the crushed concrete slides along the discharge plate 31 into the acidification tank 4. The second water pump 44 is started, pressurizing the acid and pumping it into the acid pipe 43. The pressurized acid impacts the drive impeller 431 and the stirring impeller 412, and flows into the acidification tank 4 from the opening of the drive box 42. The drive impeller 431 drives the drive disc 432 to rotate, and the drive disc 432 drives the drive rod 433 to swing. The drive rod 433 pushes the baffle plate 34 to slide, making it easy for the baffle plate 34 to slide in a cycle under the drive of the acid. At the same time, the shaft of the drive impeller 431 also drives the crusher through a two-stage belt drive. The rotation of the crushing roller 32 reduces the power source of the baffle plate 34 and the crushing roller 32, thus reducing power consumption. The stirring impeller 412 drives the stirring shaft 41 to rotate, and the stirring shaft 41 drives the first stirring plate 411 to rotate. The feeding plate 46 is driven to move back and forth in the vertical direction through the reciprocating screw. When the feeding plate 46 moves to the slide rail 47, the mixed and acidified concrete is discharged from the feeding plate 46 into the acidification box 4. This facilitates the movement of the baffle plate 34, the crushing roller 32 and the stirring shaft 41 through the acid, and also makes it easier for the concrete to be mixed and stirred with the acid. Furthermore, it makes it easier for the mixed and acidified concrete to be automatically discharged from the acidification box 4.

[0098] Reference Figure 1 and Figure 7 The grinding and drying assembly 5 is located directly below the acidification box 4. The grinding and drying assembly 5 includes a grinding block 51, an auxiliary grinding block 52, and a heating wire 53. Both the grinding block 51 and the auxiliary grinding block 52 are cylindrical and are coaxially arranged with the acidification box 4. The grinding block 51 is located above the auxiliary grinding block 52 and is fixedly connected to the stirring shaft 41. The auxiliary grinding block 52 is fixedly connected to the frame 7. There is a gap between the grinding block 51 and the auxiliary grinding block 52. The top surface of the grinding block 51 is a concave conical surface. The heating wire 53 is spiral and is fixedly sleeved on the auxiliary grinding block 52. The heating wire 53 and the auxiliary grinding block 52 are coaxially arranged.

[0099] Reference Figure 7 The new material box 6 is circular and vertically positioned directly below and coaxial with the auxiliary grinding block 52. The new material box 6 is fixedly connected to the frame 7. The bottom end of the mixing shaft 41 extends to the bottom end of the new material box 6 and is rotatably connected to it. Multiple second mixing plates 61 are fixedly connected to the portion of the mixing shaft 41 within the new material box 6 along both the circumferential and axial directions. A circular new material pipe 62 connects to the side wall at the top of the new material box 6; the new material pipe 62 is used to add new material for the newly made concrete.

[0100] During use, the acidified concrete falls from the feed plate 46 into the conical surface of the grinding block 51 and slides down the conical surface between the grinding block 51 and the auxiliary grinding block 52. The grinding block 51 grinds the concrete under the drive of the mixing shaft 41. The heating wire 53 is energized, and the heating wire 53 transfers heat to the auxiliary grinding block 52. The auxiliary grinding block 52 transfers heat to the concrete in the grinding process, so that the concrete is dried during the grinding process. The ground concrete falls into the new material box 6. The new material is added into the new material box 6 through the new material pipe 62. The second mixing plate 61 is driven by the mixing shaft 41 to mix the ground concrete and the new material, thereby completing the preparation of new concrete. In addition, the utilization value of waste concrete is improved through the recycling and processing of waste concrete.

[0101] The implementation principle of the recycled concrete processing system in this application embodiment is as follows: When in use, concrete blocks are placed into the chopping box 1, and the first water pump 213 is started. The first water pump 213 draws water from the water tank 214 into the booster pump 212. The booster pump 212 pressurizes the water and supplies it to the nozzle 211. The nozzle 211 cuts the concrete blocks in the form of water jet, separating the concrete from the reinforcing steel. The reinforcing steel is adsorbed on the cover plate 12, and the concrete fragments fall onto the screen 221. The water flow impact drives the water wheel 2222 to rotate. The water wheel 2222 drives the eccentric wheel 222 to rotate through the drive shaft 2221. The eccentric wheel 222 cyclically pushes the screen 221, and the screen 221 cyclically vibrates and screens the concrete fragments. The drive shaft 2221 drives the fixed frame 231 to rotate reciprocally through the reciprocating screw 233, drive block 232, slider 2321, and slide groove 2311, making it easy to quickly recover the reinforcing steel in the concrete.

[0102] Concrete fragments are conveyed to the freezing chamber 3 via a conveyor belt. The wet concrete freezes inside the freezing chamber 3. The second water pump 44 is activated, pressurizing and pumping acid into the acid pipe 43. The acid impacts and drives the water wheel 431 and the stirring impeller 412, flowing into the acidification tank 4. The water wheel 431, through the drive disc 432, drive rod 433, and baffle plate 34, circulates and pushes the discharge box 33 to discharge the material. The stirring impeller 412 drives the stirring shaft 41 to rotate. The frozen concrete fragments are crushed by the crushing roller 32 and then enter the acidification tank 4. The stirring shaft 41, through the first stirring plate 411, stirs the acid and concrete. The feed plate 46 is driven to slide back and forth vertically. The acidified concrete falls from the feed plate 46 onto the grinding block 51. The stirring shaft 41 drives the grinding block 51 to rotate. The grinding block 51 and the auxiliary grinding block 52 work together to grind the concrete. The heating wire 53 is energized and dries the concrete through the auxiliary grinding block 52. The ground concrete falls into the new material box 6. The stirring shaft 41 mixes the ground concrete with the new material through the second stirring plate 61. Through recycling, the waste concrete can be used as one of the basic raw materials for making new concrete, thus improving the utilization value of waste concrete.

[0103] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A processing system for recycled concrete, characterized by, Include: Chopped box (1) for holding waste concrete blocks; Cutting and screening assembly (2) provided on the chopping box (1), the cutting and screening assembly (2) is used for chopping concrete blocks by water jet, and is used for screening concrete blocks; Freezer (3) in communication with the chopping box (1), and used for freezing concrete blocks, the freezer (3) is fixedly connected with the discharge plate (31), the discharge plate (31) is provided with a crushing roller (32); Acidification tank (4) in communication with the discharge plate (31), and used for acidizing the crushed concrete; Grinding and drying assembly (5) in communication with the acidification tank (4), the grinding and drying assembly (5) is used for grinding the acidized concrete, and is used for drying the concrete while grinding; New material tank (6) for mixing new material and ground concrete; The chopping box (1) is provided with a plurality of chopping holes (11) in the circumferential direction and the axial direction, the cutting and screening assembly (2) comprises: Chopping part (21) comprising a plurality of nozzles (211) corresponding to the chopping holes (11) and slidingly arranged at the chopping holes (11), all the nozzles (211) are in common communication with the booster pump (212) through the pipeline, the booster pump (212) is in communication with the first water pump (213) through the pipeline, the first water pump (213) is in communication with the water tank (214), and the water tank (214) is filled with water; Screening part (22) arranged inside the chopping box (1) and used for vibrating and screening the chopped concrete blocks; Swing part (23) arranged outside the chopping box (1) and used for driving all the nozzles (211) to reciprocally slide along the circumferential direction of the chopping box (1); The screening part (22) comprises a screen mesh (221) slidingly connected with the chopping box (1), a plurality of eccentric wheels (222) located below the screen mesh (221), a drive water pipe (223) for driving the eccentric wheels (222) to rotate, the eccentric wheels (222) are fixedly connected with drive shafts (2221), the drive shafts (2221) are rotatably arranged on the chopping box (1), the drive shafts (2221) are rotatably arranged in the communication pipeline of the first water pump (213) and the booster pump (212), and the drive shafts (2221) are rotatably arranged in the communication pipeline of the first water pump (213) and the booster pump (212). One end of the drive shaft (2221) away from the eccentric wheel (222) is rotatably arranged in the communication pipeline of the first water pump (213) and the booster pump (212), and coaxially fixedly connected with a drive water wheel (2222). The drive water wheel (2222) is located in the communication pipeline of the first water pump (213) and the booster pump (212). The drive water pipe (223) is annular and located between the eccentric wheel (222) and the inner side wall of the chopping box (1). A plurality of drive shafts (2221) are arranged on the drive water pipe (223). The drive shafts (2221) are coaxially fixedly connected with vibration water wheels (2231) at the positions in the drive water pipe (223). The drive water pipe (223) also contains water. The swing part (23) is provided with multiple groups and corresponds to the driving shaft (2221) one by one, the swing part (23) includes a fixed frame (231) fixedly connected with all the nozzles (211) and rotatably sleeved on the chopping box (1), a driving block (232) for driving the fixed frame (231) to rotate reciprocatingly, a reciprocating screw (233) threadedly penetrating through the driving block (232), the reciprocating screw (233) is rotatably connected with the chopping box (1) and is connected with the driving shaft (2221) through a bevel gear transmission, the fixed frame (231) is provided with a sliding groove (2311) arranged at an angle with the reciprocating screw (233), and the driving block (232) is fixedly connected with a sliding block (2321) slidingly arranged in the sliding groove (2311) on the side close to the fixed frame (231).

2. A system for processing recycled concrete according to claim 1, characterized in that, The top end cover of the chopping box (1) is provided with a cover plate (12), the cover plate (12) is made of a permanent magnet, a lifting cylinder (13) is arranged between the cover plate (12) and the outer side wall of the chopping box (1), the lifting cylinder (13) is fixedly connected with the chopping box (1), and the movable end is fixedly connected with the cover plate (12), a three-way valve (215) is arranged on the pipeline between the booster pump (212) and the first water pump (213), the three-way valve (215) includes two outlets and one inlet, the inlet of the three-way valve (215) is communicated with the first water pump (213), one of the outlets of the three-way valve (215) is communicated with the booster pump (212), and the other outlet is communicated with the lifting cylinder (13), and a flow relief valve (131) is arranged on the lifting cylinder (13) and communicated with the water tank (214).

3. The system for processing recycled concrete of claim 1, wherein, The bottom of the freezing box (3) is slidably provided with a discharge box (33) matched with itself, the top end and the bottom end of the discharge box (33) are open, the top end of the discharge box (33) on one end of the sliding direction is fixedly connected with a baffle plate (34), the baffle plate (34) is matched with the freezing box (3), the discharge plate (31) is located on the end of the discharge box (33) away from the baffle plate (34), and is arranged in an inclined manner away from the discharge box (33) and away from the baffle plate (34).

4. A system for processing recycled concrete according to claim 3, wherein The acidification box (4) is coaxially and rotatably connected with a stirring shaft (41), the top end of the stirring shaft (41) is rotatably connected with a driving box (42), the stirring shaft (41) penetrates through the driving box (42) and is fixedly connected with a stirring impeller (412) on one end in the driving box (42), a first stirring plate (411) is fixedly connected with the stirring shaft (41), an acid liquid pipe (43) is communicated with one side of the driving box (42), the other side is open, the acid liquid pipe (43) is communicated with a second water pump (44), the second water pump (44) is communicated with an acid liquid tank (45), and the acid liquid tank (45) contains acid liquid.

5. A system for processing recycled concrete according to claim 4, wherein The acid liquid pipe (43) is provided with a push water wheel (431) inside the part close to the material baffle (34), the push water wheel (431) is coaxially fixedly connected with a driving disc (432), the driving disc (432) is located outside the acid liquid pipe (43), the driving disc (432) and the material baffle (34) are hingedly connected with a driving rod (433), the driving disc (432), the driving rod (433) and the material baffle (34) form a crank slider mechanism.

6. A system for processing recycled concrete according to claim 4, wherein The grinding and drying assembly (5) and the new material box (6) are sequentially located at one end of the acidification box (4) away from the driving box (42), the grinding and drying assembly (5) comprises a grinding block (51) and an auxiliary grinding block (52), the grinding block (51) is fixedly connected with the stirring shaft (41), the auxiliary grinding block (52) is fixedly connected with the acidification box (4), the new material box (6) is fixedly connected with the auxiliary grinding block (52), the stirring shaft (41) extends into the new material box (6), and a second stirring plate (61) is fixedly connected to the part in the new material box (6).

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