A cooling device for the production of recycled concrete

Abstract

This utility model discloses a cooling device for the production of recycled concrete, relating to the technical field of cooling devices. Addressing the problems of low cooling efficiency, energy consumption, and water waste in existing technologies, the following solution is proposed: a cooling box with screw conveyors fixedly inserted into the inner walls at both ends. Feed hoppers are fixedly inserted into both the screw conveyors and the top of the cooling box. A water tank is located below the cooling box, with a fixed pipe inserted between the top of the water tank and the bottom of the cooling box. A spraying mechanism connects the interior of the water tank and the interior of the cooling box. The spraying mechanism includes a water pump installed in the water tank, an L-shaped pipe inserted into one end of the water pump outlet, a cylindrical shell fixed to the top of the L-shaped pipe, connecting pipes equidistantly inserted into one side of the outer wall of the cylindrical shell, and spray rings equidistantly sleeved on the outer wall of the screw conveyor and sequentially inserted into one end of the connecting pipe. An air inlet fan is located at one end of one outer wall of the cooling box, and an air outlet pipe is fixedly inserted into the other end of the top of the cooling box.

Description

Technical Field

[0001] This utility model relates to the field of cooling device technology, and in particular to a cooling device for the production of recycled concrete. Background Technology

[0002] Recycled concrete refers to new concrete made by crushing, washing, and grading waste concrete blocks, mixing them with other aggregates in a certain proportion, and using this mixture to partially or completely replace natural aggregates such as sand and gravel, primarily coarse aggregates. Cement and water are then added to create the final product. The concrete blocks are heated to approximately 300 degrees Celsius to dehydrate and embrittle the cement paste. They are then subjected to impact and grinding in a mill to effectively remove cement paste residues from the recycled aggregates. This heated grinding process can recover not only high-quality recycled coarse aggregates from construction waste but also high-quality recycled fine and micro-aggregates. After discharge, the material is cooled in a cooler.

[0003] Traditional cooling methods mostly use natural air cooling or single-stage water cooling, which have the following shortcomings:

[0004] (1) Low cooling efficiency: Natural air cooling depends on ambient temperature, and the cooling time is long in summer. Water cooling has a limited spray range and is prone to local overheating.

[0005] (2) Energy consumption and water waste: Traditional devices do not achieve water circulation, and wastewater is directly discharged after spraying, resulting in insufficient water resource utilization. Utility Model Content

[0006] In view of the shortcomings of the prior art, this utility model provides a cooling device for the production of recycled concrete, which overcomes the shortcomings of the prior art and effectively solves the problems of low cooling efficiency, energy consumption and water waste in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A cooling device for recycled concrete production includes a cooling box. Screw conveyors are fixedly inserted into the inner walls of both ends of the cooling box, and feed hoppers are fixedly inserted into both the screw conveyors and the top of the cooling box. A water tank is located below the cooling box, and a fixed pipe is fixedly inserted between the top of the water tank and the bottom of the cooling box. A spraying mechanism connects the interior of the water tank and the interior of the cooling box. The spraying mechanism includes a water pump installed in the water tank, an L-shaped pipe inserted into one end of the water pump outlet, a cylindrical shell fixedly inserted into the top of the L-shaped pipe, connecting pipes fixedly inserted at equal intervals on one side of the outer wall of the cylindrical shell, and spray rings evenly spaced on the outer wall of the screw conveyors and sequentially fixedly inserted into one end of the connecting pipes. An air inlet fan is located at one end of one outer wall of the cooling box, and an air outlet pipe is fixedly inserted into the other end of the top of the cooling box. A curved pipe located on the other side of the cooling box is inserted into one end of the air outlet pipe, and a return pipe communicating with the interior of the water tank is fixedly inserted into the bottom of the curved pipe wall.

[0009] During the material conveying stage, recycled concrete falls from the feed hopper into the screw conveyor. The spiral blades push the material towards the discharge end. During spray cooling, the water pump pumps cold water into the L-shaped pipe, which is then distributed to each spray ring through the connecting pipe. The atomizing nozzles spray water at pressure, and the water mist exchanges heat with the material in a countercurrent flow. In conjunction with the air blower, the hot airflow carries water vapor into the curved pipe through the air outlet pipe. The condensate returns to the water tank through the return pipe. When the water level in the tank is insufficient, the PLC starts to replenish water and cool the tank. If the water level exceeds the limit, the solenoid valve is closed.

[0010] Preferably, the cooling box has two fixed frames welded to its two ends, and the two fixed frames are respectively sleeved and fixed to the two ends of the outer wall of the screw conveyor.

[0011] Preferably, the bottom of the cooling tank is welded and fixed with support legs at the four corners, and the height of the support legs is greater than the height of the water tank. A water inlet pipe with a solenoid valve is inserted and fixed at one corner of the top of the water tank, and a liquid level sensor is installed on one inner wall of the water tank.

[0012] Preferably, the bottom end of the L-shaped tube is inserted and fixed to the bottom of the outer wall of one side of the water tank, and both the L-shaped tube and the cylindrical shell are located on the outside of the cooling box and the water tank.

[0013] Preferably, the inner diameter of the spray ring is larger than the outer diameter of the screw conveyor, and the inner wall of the spray ring is fixed with atomizing nozzles that are evenly distributed. A through hole is opened on one side of the outer wall of the cooling box to form an insertion fit with the connecting pipe.

[0014] Preferably, one end of the outer wall of the cooling box is provided with an installation hole adapted to the air inlet fan, and one end of the air inlet fan is connected to a ring cover with a filter screen.

[0015] Preferably, the outer wall of the other side of the cooling box is welded and fixed with pipe clamps that are evenly distributed, and the pipe clamps are connected and fixed to the curved pipe clamps.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. High-efficiency cooling and energy saving: Multiple atomizing nozzles in the spray mechanism cover the entire length of the screw conveyor, and the forced convection of the air intake fan improves the cooling efficiency. The water pump delivers water from the water tank to the spray ring through the L-shaped pipe, and the wastewater flows back to the water tank through the fixed pipe, which improves the recycling rate. The curved pipe extends the hot air path and recovers the condensate to the water tank through the return pipe, reducing the frequency of water replenishment.

[0018] 2. Structural optimization and stability: The screw conveyor and curved pipe are double-fixed by the fixed frame and pipe clamp to avoid vibration and displacement. The liquid level sensor and solenoid valve are linked to control the water inlet pipe to maintain a constant water level. The inner diameter of the spray ring is larger than the outer diameter of the screw conveyor to prevent friction damage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a cooling device for the production of recycled concrete proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the internal structure of the cooling box of a cooling device for the production of recycled concrete proposed in this utility model.

[0021] Figure 3 This is a schematic diagram of the spray mechanism of a cooling device for recycled concrete production proposed in this utility model.

[0022] Figure 4 This is a schematic diagram of the back of the overall structure of a cooling device for the production of recycled concrete proposed in this utility model.

[0023] In the diagram: 1. Cooling box; 2. Screw conveyor; 3. Feed hopper; 4. Fixing frame; 5. Water tank; 6. Water inlet pipe; 7. Fixing pipe; 8. Spraying mechanism; 9. Water pump; 10. L-shaped pipe; 11. Cylindrical shell; 12. Connecting pipe; 13. Spraying ring; 14. Air inlet fan; 15. Air outlet pipe; 16. Curved pipe; 17. Return pipe; 18. Pipe clamp. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example:

[0026] Reference Figure 1-4A cooling device for recycled concrete production includes a cooling box 1. Screw conveyors 2 are inserted and fixed to the inner walls of both ends of the cooling box 1. Feed hoppers 3 are inserted and fixed to both the screw conveyors 2 and the top of the cooling box 1. A water tank 5 is located below the cooling box 1. A fixing pipe 7 is inserted and fixed between the top of the water tank 5 and the bottom of the cooling box 1. A spraying mechanism 8 connects the interior of the water tank 5 and the interior of the cooling box 1. The spraying mechanism 8 includes a water pump 9 installed inside the water tank 5, an L-shaped pipe 10 inserted into one end of the outlet of the water pump 9, and a fixing pipe 7. A cylindrical shell 11 is attached to the top of the L-shaped tube 10, a connecting pipe 12 is inserted and fixed at equal intervals to one side of the outer wall of the cylindrical shell 11, a spray ring 13 is sleeved at equal intervals on the outer wall of the screw conveyor 2 and sequentially inserted and fixed to one end of the connecting pipe 12, an air inlet fan 14 is provided at one end of the outer wall of one side of the cooling box 1, an air outlet pipe 15 is inserted and fixed at the other end of the top of the cooling box 1, a curved pipe 16 located on the other side of the cooling box 1 is inserted at one end of the air outlet pipe 15, and a return pipe 17 communicating with the inside of the water tank 5 is inserted and fixed at the bottom end of the pipe wall of the curved pipe 16.

[0027] The cooling box 1 has two fixed brackets 4 welded to both ends. The two fixed brackets 4 are respectively sleeved and fixed to the two ends of the outer wall of the screw conveyor 2. The fixed brackets 4 are welded to both ends of the cooling box 1. The screw conveyor 2 passes through the center hole of the fixed bracket 4 and is bolted to ensure that the horizontal error is ≤0.5mm. The feed hopper 3 is connected to the top flange of the box. The interface is sealed with a sealing strip. The bottom four corners of the cooling box 1 are welded and fixed with support legs. The height of the support legs is greater than the height of the water tank 5. The top corner of the water tank 5 is inserted and fixed with a water inlet pipe 6 with a solenoid valve installed. A liquid level sensor is installed on one side of the inner wall of the water tank 5. The liquid level sensor sets the water level threshold. When the water level is lower than the lower limit, the solenoid valve opens to allow water to enter. The water pump 9 and the air blower 14 are linked through PLC. A temperature sensor can also be added to provide feedback signals to adjust the spray frequency. The bottom end of the L-shaped pipe 10 is inserted and fixed to the bottom of one side of the outer wall of the water tank 5. The L-shaped pipe 10 and the cylindrical shell 11 are both located on the outside of the cooling box 1 and the water tank 5.

[0028] The inner diameter of the spray ring 13 is larger than the outer diameter of the screw conveyor 2. Atomizing nozzles, evenly distributed, are inserted and fixed to the annular inner wall of the spray ring 13. A through hole is provided on one side of the outer wall of the cooling box 1 to form an insertion fit with the connecting pipe 12. The water pump 9 is installed in the groove inside the water tank 5. The bottom end of the L-shaped pipe 10 is connected to the water pump 9 via a quick-release connector. Four connecting pipes 12 are connected to the top cylindrical shell 11. After the spray ring 13 is fitted into the screw conveyor 2, it is secured to the connecting pipes 12 with clamps. The nozzles are tilted at 30° to cover the material flow. One end of the outer wall of the cooling box 1 is provided with an installation hole that is compatible with the air inlet fan 14. One end of the air inlet of the air inlet fan 14 is connected to a ring cover with a filter screen. The air inlet fan 14 is an axial flow fan with a power of 1.5kW. The filter screen is removable and washable. The air outlet pipe 15 and the curved pipe 16 are welded with 304 stainless steel. The pipe clamps 18 are spaced 500mm apart and have a curvature radius ≥ 2 times the pipe diameter. The other side of the outer wall of the cooling box 1 is welded and fixed with pipe clamps 18 that are evenly distributed. The pipe clamps 18 are snapped and fixed to the curved pipe 16.

[0029] Working principle:

[0030] During operation, in the material conveying stage, recycled concrete falls from the feed hopper 3 into the screw conveyor 2. The spiral blades push the material towards the discharge end at a speed of 15 r / min. During spray cooling, the water pump 9 pumps 20℃ cold water into the L-shaped pipe 10, which is then distributed to each spray ring 13 via the connecting pipe 12. The atomizing nozzles spray at a pressure of 0.2 MPa. The water mist exchanges heat with the material in a countercurrent flow. In conjunction with the blower 14, 25℃ air is blown in. The hot airflow carries water vapor through the air outlet pipe 15 into the curved pipe 16. The condensate returns to the water tank 5 through the return pipe 17. When the water level in the water tank 5 is insufficient, the PLC starts to replenish water and cool it down. If the liquid level exceeds the limit, the solenoid valve is closed.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A cooling device for the production of recycled concrete, comprising a cooling box (1), characterized in that, Screw conveyors (2) are inserted and fixed to the inner walls of both ends of the cooling box (1), and feed hoppers (3) are inserted and fixed to the top of the screw conveyors (2) and the cooling box (1). A water tank (5) is provided below the cooling box (1), and a fixing pipe (7) is inserted and fixed between the top of the water tank (5) and the bottom of the cooling box (1). A spraying mechanism (8) is connected between the inside of the water tank (5) and the inside of the cooling box (1), and the spraying mechanism (8) includes a water pump (9) installed in the water tank (5), an L-shaped pipe (10) inserted into one end of the outlet of the water pump (9), and a pipe inserted and fixed to the top of the L-shaped pipe (10). The cylindrical shell (11), the connecting pipe (12) which is equidistantly inserted and fixed to one side of the outer wall of the cylindrical shell (11), and the spray ring (13) which is equidistantly sleeved on the outer wall of the screw conveyor (2) and sequentially inserted and fixed to one end of the connecting pipe (12), the cooling box (1) is provided with an air inlet fan (14) at one end of the outer wall of one side, and the top of the cooling box (1) is fixedly inserted with an air outlet pipe (15). One end of the air outlet pipe (15) is connected with a curved pipe (16) located on the other side of the cooling box (1), and the bottom end of the curved pipe (16) is connected with a return pipe (17) that communicates with the inside of the water tank (5).

2. The cooling device for producing recycled concrete according to claim 1, characterized in that, The cooling box (1) has two fixed frames (4) welded and fixed at both ends, and the two fixed frames (4) are respectively sleeved and fixed at both ends of the outer wall of the screw conveyor (2).

3. The cooling device for producing recycled concrete according to claim 1, characterized in that, The bottom four corners of the cooling box (1) are welded and fixed with support legs, and the height of the support legs is greater than the height of the water tank (5). A water inlet pipe (6) with a solenoid valve is inserted and fixed to one corner of the top of the water tank (5). A liquid level sensor is installed on one side of the inner wall of the water tank (5).

4. The cooling device for producing recycled concrete according to claim 1, characterized in that, The bottom end of the L-shaped tube (10) is inserted and fixed to the bottom of the outer wall of one side of the water tank (5), and the L-shaped tube (10) and the cylindrical shell (11) are both located on the outside of the cooling box (1) and the water tank (5).

5. The cooling device for producing recycled concrete according to claim 1, characterized in that, The inner diameter of the spray ring (13) is larger than the outer diameter of the screw conveyor (2), and the inner wall of the spray ring (13) is fixed with atomizing nozzles that are evenly distributed. The outer wall of one side of the cooling box (1) is provided with a through hole that is inserted and matched with the connecting pipe (12).

6. The cooling device for producing recycled concrete according to claim 1, characterized in that, The cooling box (1) has an installation hole on one side of its outer wall that is compatible with the air inlet fan (14), and the air inlet of the air inlet fan (14) is connected to a ring cover with a filter screen.

7. The cooling device for producing recycled concrete according to claim 1, characterized in that, The cooling box (1) has pipe clamps (18) welded and fixed on the outer wall of the other side, and the pipe clamps (18) are clamped and fixed to the curved pipe (16).

Images