Concrete tank truck waste automatic recovery processing system

Abstract

The invention belongs to the technical field of building construction, and particularly relates to a concrete tank truck waste automatic recovery treatment system which comprises a water adding pipe, a rotary screen, a sand pool, a gravel pool, a clean water pool, a sewage treatment pool, a controller, an electromagnetic valve, a position sensor, a clean water pump and a drainage ditch. A water inlet of the water adding pipe is communicated with a water outlet of the clean water pump; the drum screen comprises a drum screen mesh, the drum screen mesh comprises a sand filtering section and a discharging section which are distributed from top to bottom in the axial direction of the drum screen mesh, the outer side of the sand filtering section is surrounded by a sand gathering and conveying barrel with a discharging opening located in the upper side of the sand pool, and the outer side of the discharging section is surrounded by a gravel gathering and conveying barrel with a discharging opening located in the upper side of the gravel pool; the position sensor, the electromagnetic valve, the clean water pump and the driving motor are electrically connected with the controller. And whether the vehicle arrives at a designated cleaning station or not is monitored in real time so that the controller can automatically start the electromagnetic valve, the clean water pump and the driving motor to complete recycling treatment of concrete in the tank car.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically relating to an automatic recycling and processing system for concrete mixer truck waste. Background Technology

[0002] Currently in the construction industry, after concrete mixer trucks have finished pouring concrete at the construction site, a small amount of concrete is usually left in the tank. To prevent this remaining concrete from solidifying and affecting subsequent transportation, water is typically added to the tank at the construction site to flush out the remaining concrete. This leftover concrete is usually piled up directly at the construction site and cannot be reused; it can only be disposed of as construction waste. Construction waste disposal is expensive, increasing construction costs. Furthermore, the concrete removed from the mixer truck and piled up at the production site generates wastewater, causing environmental pollution.

[0003] Regarding the concrete waste left by concrete mixer trucks at construction sites, introducing a concrete recycling device from a concrete mixing plant would not only be too expensive but also require a larger footprint, making it unsuitable for the use and turnover of construction sites. To address this, Chinese patents with application numbers 202323045342.9 and 201920010669.7 disclose concrete waste recycling devices. Both devices separate sand and slurry by filtering the concrete in a recycling bin. However, both require manual flushing of the concrete mixer trucks to separate the sand and slurry, failing to consider the continuity of waste and water flushing and automatic control. This not only increases manual workload but also leads to a longer concrete recycling process for the mixer trucks, reducing their operational efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an automatic recycling and treatment system for concrete mixer truck waste, which automatically monitors the arrival of the mixer truck, adds water, and recycles the concrete waste discharged from the mixer truck, saving energy and protecting the environment, saving manpower, and improving the waste recycling efficiency.

[0005] The technical solution adopted by this invention to solve this technical problem is: an automatic recycling and processing system for concrete mixer truck waste, including a water inlet pipe, a drum screen, a sand pit, a gravel pit, a clear water pit, a sewage treatment pit, a controller, a solenoid valve for controlling the opening and closing of the water inlet pipe, a position sensor for monitoring the position of the mixer truck when it reaches the cleaning station, a clear water pump for pumping water out of the clear water pit, and a drainage ditch for connecting the sewage treatment pit and the sand pit. The bottom wall of the drainage ditch is arranged inclined downwards from the end near the sand pit to the end near the sewage treatment pit; the inlet of the water inlet pipe is connected to the outlet of the clear water pump. The rotary screen includes a frame, a drive motor mounted on the frame, a cylindrical screen with its axis inclined upwards, a rotating shaft coaxially connected inside the cylindrical screen, a feed hopper connected to the upper end of the cylindrical screen and with its opening facing upwards, and a flushing pipe with its drain outlet located on the upper side of the feed hopper. The inlet of the flushing pipe is connected to the outlet of the clean water pump. The rotating shaft is rotatably connected to the frame, and the output shaft of the drive motor is coaxially connected to the rotating shaft. A sand collection and conveying cylinder with its discharge outlet located on the upper side of the sand pool is spaced around the outer side of the cylindrical screen. The position sensor, the solenoid valve, the clean water pump, and the drive motor are all electrically connected to the controller. When the tanker is cleaning and unloading, the drain outlet of the water inlet pipe is spaced above the water inlet of the concrete tank, and the feed hopper is spaced below the discharge outlet of the concrete tank.

[0006] Furthermore, the feed hopper includes a feed cylinder section with its axis arranged in the vertical direction and a guide cylinder section with its axis arranged coaxially with the cylindrical screen. The feed cylinder section and the guide cylinder section are connected to each other. The discharge port of the guide cylinder section is located inside the cylindrical screen and is spaced apart from the cylindrical screen. The inner contour of the cross-section of the feed cylinder section gradually increases from bottom to top. During the cleaning and unloading of the tanker truck, the feed cylinder section is spaced below the unloading port of the concrete tank.

[0007] Furthermore, the sand collection and conveying cylinder is a cylindrical structure coaxially arranged with the cylindrical screen, and a sand outlet is provided at the bottom of the sand collection and conveying cylinder. The projection of the sand outlet on the horizontal plane is located in the sand pool. The lower end of the sand collection and conveying cylinder is the crushed stone outlet, which is located inside the crushed stone pool.

[0008] Furthermore, the sand collection and conveying cylinder is provided with a sand guide trough that communicates with the sand outlet. The sand guide trough is arranged inclined upward from the direction away from the sand outlet to the direction closer to the sand outlet. The lower end of the sand guide trough is located on the upper side of the internal space of the sand pool. The lower end of the sand collection and conveying cylinder is provided with a crushed stone guide channel communicating with its lower port. The opening of the crushed stone guide channel faces upward and its bottom wall is arranged inclined downward from the end close to the sand collection and conveying cylinder to the end away from the sand collection and conveying cylinder. The lower end of the crushed stone guide channel is located inside the crushed stone pool.

[0009] The bottom surface of the sand collection and conveying cylinder is arranged radially from the inside out and upwards from the sand outlet.

[0010] Furthermore, a strip brush is fixedly installed on the inner wall of the sand collection and conveying cylinder, with the bristles of the strip brush in contact with the outer wall of the cylindrical screen.

[0011] Furthermore, it also includes a nozzle installed at the top of the sand collection and conveying cylinder, the nozzle's spray nozzle being located inside the sand collection and conveying cylinder, and the nozzle's inlet being connected to the flushing pipe; The nozzles are provided in multiple quantities, and the multiple nozzles are evenly distributed along the axial direction of the cylindrical screen.

[0012] Furthermore, the wastewater treatment tank includes a sedimentation tank and a purification tank, and the outlet of the drainage ditch is located in the sedimentation tank; the outlet of the sedimentation tank is connected to the inlet of the purification tank, and the outlet of the purification tank is connected to the inlet of the clear water tank. The sedimentation tank is provided with a first on / off valve at the outlet and / or the purification tank at the inlet for controlling whether it is connected to the purification tank; the purification tank is provided with a second on / off valve at the outlet and / or the clear water tank at the inlet for controlling whether it is connected to the clear water tank.

[0013] Furthermore, the height of the outlet of the sedimentation tank is higher than that of the inlet of the purification tank, and the height of the outlet of the purification tank is higher than that of the inlet of the clear water tank; a filter screen is provided on the outlet of the sedimentation tank.

[0014] Furthermore, the position sensor includes a first horizontal direction sensor for monitoring whether the rear side wall of the tanker truck has reached a designated position and a first horizontal direction sensor for monitoring whether the left or right side wall of the tanker truck has reached a designated position.

[0015] Furthermore, the water pump is a submersible pump; the water level sensor, which is electrically connected to the controller, is installed in the water tank. It also includes a buzzer and an alarm light that are electrically connected to the controller.

[0016] Compared with the prior art, the beneficial effects of the present invention are: it provides an automatic recycling and treatment system for concrete mixer truck waste, which adds water to the concrete tank of the mixer truck by setting up a clean water pump and a water inlet pipe; it uses a drum screen to receive the diluted concrete slurry discharged from the concrete tank of the mixer truck and filters the diluted concrete slurry into recyclable sand slurry and crushed stone; it uses a sand tank to store the sand slurry filtered by the drum screen and a crushed stone tank to store the crushed stone separated by the drum screen; it uses a drainage ditch to pump the wastewater from the sand tank to a wastewater treatment tank for sedimentation and purification before recycling; and it uses a flushing pipe to flush the diluted concrete slurry and remove the sand from the screen. The system automatically controls the solenoid valve, water pump, and drive motor by setting a controller. A position sensor monitors the vehicle's arrival at the designated cleaning station in real time and feeds back the vehicle's arrival signal to the controller. This allows the controller to automatically activate the solenoid valve, water pump, and drive motor to add water to the concrete tank of the concrete mixer truck, flush the drum screen, and pump wastewater from the sand pit to a wastewater treatment tank for sedimentation and purification. This automatically completes the waste material recycling process within the concrete mixer truck, eliminating the need for manual water addition to the concrete tank and separate control of the drum screen and water pump. This saves manpower, ensures safety and reliability, and improves the efficiency of concrete waste recycling within the mixer truck. Attached Figure Description

[0017] Figure 1 This is a top view of the structure of the present invention in its working state; Figure 2 It is along Figure 1 A schematic diagram of the structure in direction A; Figure 3 This is a schematic diagram of the cross-sectional structure of the drum screen, sand pit, and gravel pit from the main view direction; Figure 4 This is a top-view cross-sectional view of the drum screen. Figure 5 This is a schematic diagram showing the connection relationships between various sensors, controllers, and actuators; Figure 6 This is a schematic diagram showing the connection between the clear water tank and the sewage treatment tank; Attached reference numerals: 1-Water inlet pipe; 11-Solenoid valve; 12-Support; 2-Drum screen; 20-Frame; 21-Drive motor; 22-Cylindrical screen; 23-Rotating shaft; 24-Feed hopper; 241-Feed cylinder section; 242-Guide cylinder section; 25-Flush pipe; 26-Sand collection and conveying cylinder; 261-Sand guide trough; 27-Strip brush; 28-Nozzle; 3-Sand pool; 32-Drainage ditch; 35-Water level sensor; 4- 51-Crushing stone pool; 52-Clear water pool; 52-Sewage treatment pool; 521-Sedimentation pool; 522-Purification pool; 53-Clear water pump; 6-Position sensor; 61-First horizontal direction sensor; 62-Second horizontal direction sensor; 8-Controller; 81-Buzzer; 82-Alarm light; 83-Filter screen; 84-First on / off valve; 85-Second on / off valve; 90-Tank truck; 91-Water inlet of concrete tank; 92-Unloading port of concrete tank. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] Reference Figures 1-6An automatic recycling and processing system for concrete mixer truck waste includes a water inlet pipe 1, a drum screen 2, a sand pit 3, a gravel pit 4, a clear water pit 51, a sewage treatment pit 52, a controller 8, a solenoid valve 11 for controlling the opening and closing of the water inlet pipe 1, a position sensor 6 for monitoring the mixer truck 90 reaching the cleaning station, a clear water pump 53 for pumping water out of the clear water pit 51, and a drainage ditch 32 connecting the sewage treatment pit 52 and the sand pit 3. The bottom wall of the drainage ditch 32 is arranged inclined downward from the end near the sand pit 3 to the end near the sewage treatment pit 52. The inlet of the water inlet pipe 1 is connected to the outlet of the clear water pump 53. The drum screen 2 includes a frame 20, a drive motor 21 mounted on the frame 20, a cylindrical screen 22 with its axis inclined upward, and a coaxially connected to... The cylindrical screen 22 contains a rotating shaft 23, an upward-facing feed hopper 24 connected to the upper end of the cylindrical screen 22, and a flushing pipe 25 with its drain outlet located on the upper side of the feed hopper 24. The inlet of the flushing pipe 25 is connected to the outlet of the clean water pump 53. The rotating shaft 23 is rotatably connected to the frame 20, and the output shaft of the drive motor 21 is coaxially connected to the rotating shaft 23. The cylindrical screen 22 is surrounded at intervals by a sand collection and conveying cylinder 26 with its outlet located on the upper side of the sand pool 3. The position sensor 6, the solenoid valve 11, the clean water pump 53, and the drive motor 21 are electrically connected to the controller 8. When the tank truck 90 is unloading cleanly, the drain outlet of the water supply pipe 1 is spaced above the water inlet 91 of the concrete tank, and the feed hopper 24 is spaced below the unloading outlet 92 of the concrete tank. The clean water pool 51 always contains clean water. The cylindrical screen 22 is a cylindrical screen with screen holes that only allow sand to pass through in order to separate sand and gravel.

[0020] When a small amount of concrete that cannot be poured normally remains in the tank of the tanker truck 90, the tanker truck 90 is driven to the unloading position. When the position sensor 6 detects that the tanker truck 90 has stopped at the unloading position, it sends a tanker truck arrival signal to the controller 8. The controller 8 controls the water pump 53 to start pumping water, controls the solenoid valve 11 to open the internal pipe of the water inlet pipe 1, and controls the drive motor 21 to drive the cylindrical screen 22 to rotate. The water pump 53 pumps the water in the water tank 51 into the water inlet pipe 1 and the flushing pipe 25. The water in the water inlet pipe 1 is discharged into the concrete tank water inlet 91 of the tanker truck 90 to dilute the remaining concrete in the concrete tank. The diluted concrete is discharged through the concrete tank unloading port 92 into the feed hopper 24 and then enters the inner side of the cylindrical screen 22. At the same time, the water in the flushing pipe 25 is discharged into the feed hopper 24 to flush the waste concrete entering the drum screen 2. Sand and water from the concrete waste entering the inner side of the cylindrical screen 22 are screened out through the screen holes and transported to the sand pool 3 via the sand collection and conveying cylinder 26. The sand in the sand pool 3 settles to the bottom, while the water at the top of the sand pool 3 flows through the drainage ditch 32 into the sewage treatment tank 52 for purification. The purified water can be reused. The concrete waste with a particle size larger than the screen holes remaining in the cylindrical screen 22 is crushed stone. The crushed stone continues to move downwards along the axial direction of the cylindrical screen 22 to the crushed stone tank 4 for recycling. Finally, the sand in the sand pool 3 and the crushed stone in the crushed stone tank 4 can be reused in construction operations such as foundation pit backfilling. The water in the sewage treatment tank 52, after sedimentation and purification, can be reused for adding water to the tanker truck 90, flushing the feed hopper 24, or other on-site construction operations.

[0021] In summary, this invention adds water to the concrete tank of the tanker truck 90 by setting up a clean water pump 53 and a water supply pipe 1; it uses a drum screen 2 to receive the diluted concrete slurry discharged from the concrete tank of the tanker truck 90 and filters the diluted concrete slurry into recyclable sand slurry and crushed stone; it uses a sand tank 3 to store the sand slurry filtered by the drum screen 2 and a crushed stone tank 4 to store the crushed stone separated by the drum screen 2; it uses a drainage ditch 32 to pump the wastewater from the sand tank 3 to a wastewater treatment tank 52 for sedimentation and purification before recycling; it uses a flushing pipe 25 to flush the diluted concrete slurry and flush the sand out of the screen holes; and it uses a controller 8 to control the solenoid valve 11... The automatic control of the water pump 53 and the drive motor 21 is achieved by setting a position sensor 6 to monitor in real time whether the vehicle has reached the designated cleaning station and feeding back the vehicle arrival signal to the controller 8 in real time. This allows the controller 8 to automatically open the solenoid valve 11, the water pump 53, and the drive motor 21 to complete the operations of adding water to the concrete tank of the concrete truck 90, flushing water into the drum screen 2, and pumping the sewage in the sand pool 3 to the sewage treatment pool 52 for sedimentation and purification. This automatically completes the waste recycling process in the concrete truck, eliminating the need for manual operation to add water to the concrete tank and the need for manual control of the drum screen 2 and the water pump 53. This saves manpower, is safe and reliable, and improves the efficiency of concrete waste recycling in the concrete truck 90.

[0022] Water inlet pipe 1 is mainly used to add water to the concrete tank of tanker truck 90. ​​The water inlet of the concrete tank of tanker truck 90 is generally located at the upper rear end. Therefore, a bracket 12 is usually provided to fix water inlet pipe 1. The drain end of water inlet pipe 1 is fixedly mounted on bracket 12 with the drain outlet facing downwards. When tanker truck 90 moves to the designated cleaning and unloading station, the distance between the drain outlet of water inlet pipe 1 and the water inlet 91 of the concrete tank is generally 10-15cm. Water inlet pipe 1 can be a steel pipe or a PVC pipe, but PE pipe is preferred. Flexible hoses are generally not used to facilitate binding and mounting it on bracket 12.

[0023] The drum screen 2 is mainly used to filter and classify sand and gravel in diluted concrete waste. The frame 20 is mainly used to integrate and assemble multiple components into a module and to erect the drum screen 2 on the ground. The feed hopper 24 is mainly used to guide the concrete waste slurry discharged from the concrete tank discharge port 92 into the inner side of the cylindrical screen 22 of the drum screen 2. It is generally a curved pipe structure fixed on the frame 20. To ensure the fluidity of the concrete slurry, the height of the feed inlet of the feed hopper 24 is required to be higher than the position of the discharge outlet of the feed hopper 24. The discharge outlet of the feed hopper 24 is located on the upper inner side of the cylindrical screen 22 and is spaced apart from the cylindrical screen 2 to avoid friction between the cylindrical screen 22 and the feed hopper 24 during the rotation of the cylindrical screen 22. Specifically, the feed hopper 24 includes a feed cylinder section 241 with its axis arranged vertically and a guide cylinder section 242 with its axis coaxial with the cylindrical screen 22. The feed cylinder section 241 and the guide cylinder section 242 are connected internally. The outlet of the guide cylinder section 242 is located inside the cylindrical screen 22 and is spaced apart from it. The inner contour of the cross-section of the feed cylinder section 241 gradually increases from bottom to top. When the tanker truck 90 is unloading, the feed cylinder section 241 is spaced below the concrete tank discharge port 92. The upper opening of the feed cylinder section 241 is large to better ensure that the slurry discharged from the concrete tank discharge port 92 completely enters the feed hopper 24. At the same time, the inner wall of the feed cylinder section 241 is generally arranged radially from the inside to the outside and upward along its central axis, which is more conducive to the slurry eventually flowing into the cylindrical screen 22 along its axis.

[0024] The drive motor 21 and the rotating shaft 23 are generally connected by a coupling to drive the cylindrical screen 22 to rotate coaxially. The rotating shaft 23 and the cylindrical screen 22 are generally connected by a bracket, and the rotating shaft 23 and the frame 20 are generally connected by a rotating bearing. Specifically, the sand collection and conveying cylinder 26 is a cylindrical structure arranged coaxially with the cylindrical screen 22. The bottom of the sand collection and conveying cylinder 26 has a sand outlet, the projection of which on the horizontal plane is located within the sand pool 3. The lower end of the sand collection and conveying cylinder 26 is a crushed stone outlet, located within the crushed stone pool 4. The sand collection and conveying cylinder 26 is used to collect the filtered sand and discharge it through the sand outlet and crushed stone outlet.

[0025] Considering the limited space available for the sand and gravel pits 3 and 4 on site, preferably, the sand conveying cylinder 26 is provided with a sand guide trough 261 connected to the sand outlet. The sand guide trough 261 is arranged inclined upwards from the direction away from the sand outlet towards the direction closer to the sand outlet. The lower end of the sand guide trough 261 is located on the upper side of the internal space of the sand pit 3. The lower end of the sand conveying cylinder 26 is provided with a gravel guide trough 271 connected to its lower port. The gravel guide trough 271 has an upward opening and its bottom wall is arranged inclined downwards from the end closer to the sand conveying cylinder 26 towards the end away from the sand conveying cylinder 26. The lower end of the gravel guide trough 271 is located inside the gravel pit 4. By setting the sand guide trough 261, sand can be conveyed to the sand pit 3 at any horizontal position, and the gravel guide trough 271 can convey gravel to the gravel pit 4 at any horizontal position. The sand guide trough 261 and the gravel guide trough 271 can be either a cylindrical structure or a trough structure with an opening on the top. As a further preferred embodiment, the bottom surface of the sand collection and conveying cylinder 26 is arranged radially upwards from the inside out from the sand outlet. The sand outlet in this structure can be located at any position on the lower side of the sand collection and conveying cylinder 26.

[0026] Preferably, a strip brush 27, arranged axially along its length, is fixedly installed on the inner wall of the sand collection cylinder 26, with the bristles of the strip brush 27 in contact with the outer wall of the cylindrical screen 22. During the rotation of the cylindrical screen 22, the bristles of the strip brush 27 clean the outer side of the cylindrical screen 22, preventing sand from adhering to the screen and clogging the screen holes. The strip brush 27 is generally made of steel wire for greater wear resistance.

[0027] Preferably, the system further includes a nozzle 28 disposed at the top of the sand collection and conveying cylinder 26. The spray nozzle 28 has its spray outlet located inside the sand collection and conveying cylinder, and its inlet is connected to the flushing pipe 25. Multiple nozzles 28 are provided, and these nozzles 28 are evenly distributed along the axial direction of the cylindrical screen 22. The nozzles 28 spray water onto the inner side of the cylindrical screen 22 to flush away the sand, ensuring unobstructed screen openings and improving the reliability of sand filtration.

[0028] The clear water tank 51 is used to store clear water. Clean water is added to the concrete tank of the tanker truck 90 through the water inlet pipe 1, and clean water is added to the drum screen 2 through the flushing pipe 25. The sewage treatment tank 52 is used to purify the sewage returned from the sand tank. Preferably, the sewage treatment tank 52 includes a sedimentation tank 521 and a purification tank 522. The outlet of the drainage ditch 32 is located in the sedimentation tank 521. The outlet of the sedimentation tank 521 is connected to the inlet of the purification tank 522, and the outlet of the purification tank 522 is connected to the inlet of the clear water tank 51. A first on / off valve 84 is provided on the outlet of the sedimentation tank 521 and / or the inlet of the purification tank 522 to control whether they are connected to the purification tank 522. A second on / off valve 85 is provided on the outlet of the purification tank 522 and / or the inlet of the clear water tank 51 to control whether they are connected to the clear water tank 51. Both the first and second on / off valves 84 and 85 are normally closed. That is, under normal circumstances, the sedimentation tank 521 and the purification tank 522 are not connected, and the purification tank 522 and the clear water tank 51 are not connected. Wastewater pumped from the sand tank 3 is first discharged into the sedimentation tank 521 for settling. Then, the first on / off valve 84 is opened to allow the purified water in the sedimentation tank 521 to flow into the purification tank 522. Subsequently, a purifying agent is added to the purification tank 522 to purify the water. The purifying agent can be flocculants such as polyaluminum chloride, polyaluminum sulfate, polyferric chloride, and polyferric sulfate, as well as disinfectants such as bleaching powder, sodium hypochlorite, and chlorine dioxide. After the water in the purification tank 522 is purified, the second on / off valve 85 is opened to allow the purified water in the purification tank 522 to flow back into the clear water tank 51. The purified water in the wastewater treatment tank 52 returns to the clear water tank 51 for recycling, saving water resources and promoting environmental protection.

[0029] The first and second on / off valves 84 and 85 mentioned above are generally one-way valves. That is, water in the sedimentation tank 521 can only flow into the purification tank 522, and water in the purification tank 522 cannot flow back into the sedimentation tank 521; water in the purification tank 522 can only flow into the clear water tank 51 and cannot flow back, and water in the clear water tank 51 cannot flow into the purification tank 522. As a further preferred embodiment, the height of the drain outlet of the sedimentation tank 521 is higher than the height of the inlet of the purification tank 522, and the height of the drain outlet of the purification tank 522 is higher than the height of the inlet of the clear water tank 51; a filter screen 83 is provided on the drain outlet of the sedimentation tank 521.

[0030] Position sensor 6 is used to monitor in real time whether the tanker truck 90 has reached the designated cleaning and unloading station. The position sensor 6 can be an existing vision inspection device, but this is costly. To save costs, the position sensor 6 can use an infrared field sensor, laser sensor, microswitch, etc. Preferably, the position sensor 6 includes a first horizontal direction sensor 61 for monitoring whether the rear side wall of the tanker truck 90 has reached the designated position and a second horizontal direction sensor 62 for monitoring whether the left or right side wall of the tanker truck 90 has reached the designated position. The first horizontal direction is perpendicular to the second horizontal direction. The two position sensors 6 cooperate to monitor the tanker truck 90 in the front-rear and left-right directions, and transmit their monitoring signals to the controller 8 in real time. Only when both position sensors 6 detect that the vehicle has reached the designated position can the controller 8 control the solenoid valve 11, the clean water pump 53, and the drive motor 21 to start.

[0031] The water pump 53 can be an axial flow pump, centrifugal pump, or submersible pump. Preferably, the water pump 53 is a submersible pump. The water level sensor 35, which is electrically connected to the controller 8, is installed in the water tank 51. The water level sensor 35 is used to monitor the water level in the water tank 51 and the sand tank 3 in real time and transmit the water level signal back to the controller 8 in real time. When the water level in the water tank 51 reaches the warning level, the controller 8 controls the water pump 53 to stop working to prevent the water level in the water tank 51 from being too low and causing damage to the water pump 53.

[0032] Preferably, the system also includes a buzzer 81 and an alarm light 82 electrically connected to the controller 8. When the water level in the sand pit 3 or the clear water pit 51 reaches the warning value, the controller 8 will also control the buzzer 81 and the alarm light 82 to sound an alarm, so as to remind the operators to deal with the situation in time and ensure the normal operation of the system.

[0033] The controller 8 is used to receive real-time signals from sensors such as position sensor 6 and water level sensor 35, and automatically complete the opening and closing of actuators such as clean water pump 53, drive motor 21, and solenoid valve according to the data signals, thereby ensuring the smooth, efficient and reliable operation of the entire system. When the concrete mixer truck 90 leaves the cleaning and unloading station, it can automatically complete the automatic recycling and processing of concrete waste, saving manpower and improving processing efficiency.

[0034] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic recycling and processing system for concrete mixer truck waste, characterized in that: The system includes a water inlet pipe (1), a drum screen (2), a sand pit (3), a gravel pit (4), a clear water pit (51), a sewage treatment pit (52), a controller (8), a solenoid valve (11) for controlling the opening and closing of the water inlet pipe (1), a position sensor (6) for monitoring the tanker truck (90) reaching the cleaning station, a clear water pump (53) for pumping water out of the clear water pit (51), and a drainage ditch (32) for connecting the sewage treatment pit (52) and the sand pit (3). The bottom wall of the drainage ditch (32) is arranged inclined downward from the end near the sand pit (3) to the end near the sewage treatment pit (52). The inlet of the water inlet pipe (1) is connected to the outlet of the clear water pump (53). The drum screen (2) includes a frame (20), a drive motor (21) mounted on the frame (20), a cylindrical screen (22) with its axis inclined upward, a rotating shaft (23) coaxially connected inside the cylindrical screen (22), a feed hopper (24) connected to the upper port of the cylindrical screen (22) and with its opening facing upward, and a flushing pipe (25) with its drain outlet located on the upper side of the feed hopper (24). The inlet of the flushing pipe (25) is connected to the outlet of the clean water pump (53). The rotating shaft (23) is rotatably connected to the frame (20), and the output shaft of the drive motor (21) is coaxially connected to the rotating shaft (23). The outer side of the cylindrical screen (22) is surrounded by a sand collection and conveying cylinder (26) with its outlet located on the upper side of the sand pool (3). The position sensor (6), the solenoid valve (11), the clean water pump (53) and the drive motor (21) are electrically connected to the controller (8) respectively; when the tank truck (90) is cleaning and unloading, the drain outlet of the water pipe (1) is spaced above the water inlet (91) of the concrete tank, and the feed hopper (24) is spaced below the unloading port (92) of the concrete tank.

2. The automatic recycling and processing system for concrete mixer truck waste according to claim 1, characterized in that: The feed hopper (24) includes a feed cylinder section (241) with its axis arranged in the vertical direction and a guide cylinder section (242) with its axis arranged coaxially with the cylindrical screen (22). The feed cylinder section (241) and the guide cylinder section (242) are connected in the inner cavity. The outlet of the guide cylinder section (242) is located inside the cylindrical screen (22) and is spaced apart from the cylindrical screen (22). The inner contour of the cross-section of the feed cylinder section (241) gradually increases from bottom to top. When the tanker truck (90) is cleaning and unloading, the feed cylinder section (241) is spaced below the concrete tank unloading port (92).

3. The automatic recycling and processing system for concrete mixer truck waste according to claim 2, characterized in that: The sand collection and conveying cylinder (26) is a cylindrical structure arranged coaxially with the cylindrical screen (22). The bottom of the sand collection and conveying cylinder (26) is provided with a sand outlet, and the projection of the sand outlet on the horizontal plane is located in the sand pool (3). The lower end of the sand collection and conveying cylinder (26) is the crushed stone outlet, which is located inside the crushed stone pool (4).

4. The automatic recycling and processing system for concrete mixer truck waste according to claim 3, characterized in that: The sand collection and conveying cylinder (26) is provided with a sand guide trough (261) that is connected to the sand outlet. The sand guide trough (261) is arranged inclined upward from the direction away from the sand outlet to the direction closer to the sand outlet. The lower end of the sand guide trough (261) is located on the upper side of the internal space of the sand pool (3). The lower end of the sand collection and conveying cylinder (26) is provided with a crushed stone guide channel (271) communicating with its lower port. The crushed stone guide channel (271) has an opening facing upward and its bottom wall is arranged inclined downward from the end close to the sand collection and conveying cylinder (26) to the end away from the sand collection and conveying cylinder (26). The lower end of the crushed stone guide channel (271) is located inside the crushed stone pool (4). The bottom surface of the sand collection and conveying cylinder (26) is arranged radially from the inside out and upwards from the sand outlet.

5. The automatic recycling and processing system for concrete mixer truck waste according to claim 1, characterized in that: A strip brush (27) is fixedly installed on the inner wall of the sand collection and conveying cylinder (26) along its axial direction, and the bristles of the strip brush (27) are in contact with the outer wall of the cylindrical screen (22).

6. The automatic recycling and processing system for concrete mixer truck waste according to claim 5, characterized in that: It also includes a nozzle (28) set on the top of the sand collection and conveying cylinder (26), the spray nozzle (28) is located inside the sand collection and conveying cylinder, and the inlet of the nozzle (28) is connected to the flushing pipe (25); The nozzles (28) are provided in multiple ways, and the multiple nozzles (28) are evenly distributed along the axial direction of the cylindrical screen (22).

7. The automatic recycling and processing system for concrete mixer truck waste according to claim 1, characterized in that: The wastewater treatment tank (52) includes a sedimentation tank (521) and a purification tank (522). The outlet of the drainage ditch (32) is connected to the sedimentation tank (521). The outlet of the sedimentation tank (521) is connected to the inlet of the purification tank (522). The outlet of the purification tank (522) is connected to the inlet of the clear water tank (51). The sedimentation tank (521) is provided with a first on / off valve at the outlet and / or the purification tank (522) at the inlet for controlling whether it is connected to the purification tank (522); the purification tank (522) is provided with a second on / off valve at the outlet and / or the clear water tank (51) at the outlet for controlling whether it is connected to the clear water tank (51).

8. The automatic recycling and processing system for concrete mixer truck waste according to claim 7, characterized in that: The height of the drain outlet of the sedimentation tank (521) is higher than that of the inlet of the purification tank (522), and the height of the drain outlet of the purification tank (522) is higher than that of the inlet of the clear water tank (51); a filter screen is provided on the drain outlet of the sedimentation tank (521).

9. The automatic recycling and processing system for concrete mixer truck waste according to any one of claims 1-8, characterized in that: The position sensor (6) includes a first horizontal direction sensor (61) for monitoring whether the rear side wall of the tanker (90) has reached a designated position and a second horizontal direction sensor (62) for monitoring whether the left or right side wall of the tanker (90) has reached a designated position.

10. The automatic recycling and processing system for concrete mixer truck waste according to claim 9, characterized in that: The water pump (53) is a submersible pump, and the water level sensor (35) is provided in the water tank (51) and is electrically connected to the controller (8). It also includes a buzzer (81) and an alarm light (82) that are electrically connected to the controller (8).

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