Sand washing and fine sand recycling all-in-one machine
By adding an auxiliary stirring device and a scraping mechanism to the integrated sand washing and fine sand recovery machine, the problems of poor cleaning effect and fine sand sedimentation of spiral sand washing machines have been solved, achieving more efficient fine sand recovery and stable equipment operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HAIKEN (DANZHOU) NEW ENVIRONMENTALLY FRIENDLY BUILDING MATERIALS CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-15
AI Technical Summary
In the existing spiral sand washing and fine sand recovery integrated machine, the spiral blades have limited cleaning effect on sand and gravel during the washing process. Sand and gravel between adjacent spiral blades tend to pile up, and the sand and gravel at the bottom are difficult to clean. Fine sand and mud in the overflow tank tend to settle, resulting in low fine sand recovery efficiency and increased equipment pressure.
An auxiliary stirring device is added to the rotating shaft and a scraping mechanism is installed in the overflow tank. The auxiliary stirring device stirs the sand and gravel between adjacent spiral blades through the stirring rod, and the scraping mechanism continuously scrapes the sediment at the bottom of the overflow tank to ensure a stable concentration of fine sand in the waste liquid.
It improves the sand and gravel cleaning effect, avoids the problem of incomplete cleaning of the bottom of the sand and gravel, and maintains a stable fine sand concentration in the waste liquid in the overflow tank, which helps the hydrocyclone to efficiently recover fine sand and reduces equipment pressure and waste.
Smart Images
Figure CN224237070U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of sand washing equipment, and in particular to an integrated machine for washing and recovering fine sand. Background Technology
[0002] Sand washing machines are equipment for washing and selecting sand and gravel. They are widely used in industries such as sand and gravel plants, mines, and concrete mixing plants. They wash and select sand and gravel raw materials and recover fine sand from the wastewater after washing. This can reduce material waste, realize the recycling of fine sand, and avoid the direct discharge of wastewater and environmental pollution.
[0003] The spiral sand washing and fine sand recovery integrated machine widely used in the market at present has an inclined washing tank. The spiral blades stir and wash the sand and gravel raw materials, and move the sand and gravel to a high place for discharge. The waste liquid discharged from the washing tank is collected into the overflow tank and pumped to the hydrocyclone for fine sand separation and recovery by the slurry pump.
[0004] However, during the operation of the spiral sand washing and fine sand recovery integrated machine, the spiral blades only push the sand and gravel raw materials upward along the direction of the rotating shaft, without fully agitating and cleaning the sand and gravel raw materials. The cleaning effect on the sand and gravel is limited, and the sand and gravel between adjacent spiral blades tend to pile up, and the bottom of the sand and gravel cannot be cleaned. In addition, the fine sand and mud in the waste liquid stored in the overflow tank tend to settle at the bottom of the overflow tank. On the one hand, the fine sand that settles to the bottom of the overflow tank makes the fine sand concentration at the bottom of the tank too high, which will bring greater pressure to the slurry pump, and will also prevent the hydrocyclone from fully recovering the fine sand, resulting in waste. Utility Model Content
[0005] In view of the above-mentioned prior art, the present invention provides an integrated machine for washing and recovering fine sand. By adding an auxiliary stirring device to the rotating shaft, the auxiliary stirring device rotates with the rotating shaft and will not affect the normal operation of the spiral blade. A reciprocating scraping mechanism is added to the overflow tank to continuously lift up the settled fine sand and sludge, so as to stabilize the concentration of fine sand in the waste liquid in the overflow tank, thereby ensuring that the hydrocyclone can fully play its role in separating fine sand.
[0006] To achieve the above objectives, the technical solution of this utility model embodiment is implemented as follows:
[0007] A sand washing and fine sand recovery integrated machine includes a spiral sand washing device and a fine sand recovery device. The spiral sand washing device includes an inclined sand washing tank, a first rotating shaft rotatably connected inside the sand washing tank, spiral blades fixedly connected to the first rotating shaft, a first motor for driving the first rotating shaft to rotate on the outer wall of the sand washing tank, a discharge port at the bottom of the tank at the high end of the sand washing tank, an auxiliary stirring mechanism on the first rotating shaft for stirring the sand and gravel between adjacent spiral blades, an overflow port of the sand washing tank connected to an overflow trough through a pipe, a scraping mechanism inside the overflow trough for reciprocating cleaning of the fine sand settled at the bottom of the overflow trough, and the overflow trough connected to the fine sand recovery device through a pipe.
[0008] Furthermore, the auxiliary stirring mechanism includes a fixed rod, the two ends of which are fixedly connected to the two ends of the sand washing tank. The first rotating shaft is a hollow structure, and the fixed rod is inside the first rotating shaft. The central axis of the fixed rod coincides with the central axis of the first rotating shaft. A first bevel gear is fixedly connected to the fixed rod. A second rotating shaft passes through the first rotating shaft and is rotatably connected to the first rotating shaft. Stirring rods are fixedly connected to both ends of the second rotating shaft. The stirring rods are outside the first rotating shaft. A second bevel gear is fixedly connected to the second rotating shaft. The first bevel gear and the second bevel gear are meshed together.
[0009] Furthermore, the scraping mechanism includes a third rotating shaft, which passes through one side wall of the overflow trough and is rotatably connected to the other side wall of the overflow trough. Several sets of support rods are fixedly connected to the third rotating shaft, and scrapers are fixedly connected to the ends of the support rods away from the third rotating shaft. The scrapers are parallel to the third rotating shaft. The overflow trough is a U-shaped water tank with a semi-circular cross-section at the bottom. The central axis of the third rotating shaft coincides with the central axis of the overflow trough. An incomplete gear drive mechanism is connected to one end of the third rotating shaft located on the outer wall of the overflow trough. The incomplete gear drive mechanism is used to drive the scrapers to perform reciprocating scraping motion on the bottom of the overflow trough.
[0010] Furthermore, the incomplete gear drive mechanism includes a first incomplete gear, which is fixedly connected to a third rotating shaft. The first incomplete gear is meshed with a second incomplete gear, which is rotatably connected to the outer wall of the overflow trough. The first and second incomplete gears are meshed with a rack, which is slidably connected to the outer wall of the overflow trough. A drive device for driving the second incomplete gear to rotate is fixedly connected to the outer wall of the overflow trough.
[0011] Furthermore, the support rod includes a sleeve and a slide rod, which are slidably connected. The end of the sleeve away from the slide rod is fixedly connected to a third rotating shaft. A spring is fixedly connected inside the sleeve and is fixedly connected to the slide rod. The end of the slide rod away from the spring is fixedly connected to a scraper.
[0012] Furthermore, a through groove is provided on the sleeve, and a limit rod is fixedly connected to the slide rod, which slides within the through groove.
[0013] Furthermore, the bottom of the scraper is covered with rubber.
[0014] Furthermore, the fine sand recovery device includes a slurry pump and a hydrocyclone. The extraction port of the slurry pump is connected to the bottom of the overflow tank, and the discharge port of the slurry pump is connected to the inlet of the hydrocyclone.
[0015] The beneficial effects of this utility model are as follows: By adding an auxiliary stirring mechanism between adjacent spiral blades, the sand and gravel are stirred and lifted between adjacent spiral blades as the spiral blades push the sand and gravel upward along the direction of rotation. This improves the cleaning effect of the sand and gravel and also helps the fine sand that is not flowing well at the bottom of the sand and gravel to be fully dissolved in water and discharged for fine sand collection. A reciprocating scraping mechanism is added to the overflow tank to prevent fine sand and sludge from settling to the bottom of the tank. During the scraping process, the fine sand concentration of the waste liquid in the overflow tank is kept stable, which helps the subsequent hydrocyclone to separate and recover fine sand. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of an integrated sand washing and fine sand recovery machine according to the present invention;
[0017] Figure 2 A schematic diagram showing the addition of an auxiliary stirring device to the sand washing and fine sand recovery integrated machine of this utility model;
[0018] Figure 3 A schematic diagram of the structure of an integrated sand washing and fine sand recovery machine of this utility model with an added auxiliary stirring device;
[0019] Figure 4 This is a schematic diagram of the overflow trough structure of an integrated sand washing and fine sand recovery machine according to this utility model;
[0020] Figure 5 This is a schematic diagram of an incomplete gear drive mechanism for a sand washing and fine sand recovery integrated machine according to the present invention;
[0021] Figure 6 This is a schematic diagram of the scraping mechanism of an integrated sand washing and fine sand recovery machine according to the present invention;
[0022] Figure 7 This is a schematic diagram of the support rod structure of an integrated sand washing and fine sand recovery machine according to the present invention.
[0023] Explanation of reference numerals in the attached diagram: 1. Sand washing tank; 2. First rotating shaft; 3. Spiral blade; 4. Overflow tank; 5. Slurry pump; 6. Hydrocyclone; 7. Fixed rod; 8. First bevel gear; 9. Second rotating shaft; 10. Second bevel gear; 11. Stirring rod; 12. Third rotating shaft; 13. Support rod; 14. Scraper; 15. Rack; 16. Discharge port; 17. First incomplete gear; 18. Second incomplete gear; 19. First motor; 20. Drive device; 21. Sleeve; 22. Slide rod. Detailed Implementation
[0024] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in this specification of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. In the following description, the expression "some embodiments" refers to a subset of all possible embodiments; however, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.
[0025] Combined with reference to the appendix Figures 1 to 6 This utility model provides an integrated sand washing and fine sand recovery machine, including a spiral sand washing device and a fine sand recovery device. The spiral sand washing device includes an inclined sand washing tank 1, a first rotating shaft 2 rotatably connected inside the sand washing tank 1, and spiral blades 3 fixedly connected to the first rotating shaft 2. A first motor 19 for driving the first rotating shaft 2 to rotate is provided on the outer wall of the sand washing tank 1. A discharge port 16 is opened at the bottom of the tank at the high end of the sand washing tank 1. An auxiliary stirring mechanism is provided on the first rotating shaft 2. The auxiliary stirring mechanism is used to stir the sand and gravel between adjacent spiral blades 3. The overflow port of the sand washing tank 1 is connected to an overflow tank 4 through a pipe. A scraping mechanism is provided inside the overflow tank 4. The scraping mechanism is used to reciprocate to clean the fine sand settled at the bottom of the overflow tank 4. The overflow tank 4 is connected to the fine sand recovery device through a pipe. In operation, the rotation of the first rotating shaft 2 drives the spiral blade 3 to rotate. The spiral blade 3 pushes the sand and gravel upward along the center line of the first rotating shaft 2. The sand and gravel between adjacent spiral blades 3 have poor cleaning effect. The auxiliary stirring mechanism stirs and cleans the sand and gravel between adjacent spiral blades 3, improving the cleaning effect. At the same time, it can lift the sand and gravel that has sunk to the bottom of the water, which helps the fine sand to dissolve in the water. The sand and gravel enter the overflow tank 4 through the overflow port. The auxiliary stirring mechanism rotates with the first rotating shaft 2 and will not affect the normal spiral cleaning. The cleaned sand and gravel are discharged from the discharge port 16 above the sand washing tank 1. The wastewater containing fine sand and mud enters the overflow tank 4 from the overflow port of the sand washing tank 1. The scraping mechanism in the overflow tank 4 continuously scrapes off the settled fine sand and stirs the water flow, so that the concentration of fine sand in the wastewater in the overflow tank 4 is stable, which helps the subsequent fine sand recovery device to operate normally.
[0026] Preferably, the auxiliary stirring mechanism includes a fixed rod 7, the two ends of which are fixedly connected to the two ends of the sand washing tank 1, the first rotating shaft 2 is a hollow structure, the fixed rod 7 is inside the first rotating shaft 2, the central axis of the fixed rod 7 coincides with the central axis of the first rotating shaft 2, a first bevel gear 8 is fixedly connected to the fixed rod 7, a second rotating shaft 9 passes through the first rotating shaft 2, the second rotating shaft 9 is rotatably connected to the first rotating shaft 2, a stirring rod 11 is fixedly connected to both ends of the second rotating shaft 9, the stirring rod 11 is outside the first rotating shaft 2, a second bevel gear 10 is fixedly connected to the second rotating shaft 9, and the first bevel gear 8 and the second bevel gear 10 are meshed together. During operation, the fixed rod 7 is fixedly connected to the sand washing tank 1. The first rotating shaft 2 is a hollow structure. The first motor 19 drives the first rotating shaft 2 to rotate, and the fixed rod 7 does not rotate accordingly. The second rotating shaft 9 passes through the first rotating shaft 2. When the first rotating shaft 2 rotates, the second rotating shaft 9 rotates around the central axis of the first rotating shaft 2. The second rotating shaft 9 is rotatably connected to the first rotating shaft 2. The first bevel gear 8 is fixedly connected to the fixed rod 7, and the second bevel gear 10 is fixedly connected to the second rotating shaft 9. The first bevel gear 8 and the second bevel gear 10 are meshed. The position of the first bevel gear 8 remains unchanged, and the position of the second bevel gear 10 remains unchanged. The first bevel gear 8 rotates around the first bevel gear 2. When the second shaft 9 rotates around the central axis of the first shaft 2, the second bevel gear 10 drives the second shaft 9 to rotate. Both ends of the second shaft 9 are fixedly connected to stirring rods 11. The rotation of the second shaft 9 drives the stirring rods 11 to stir the sand and gravel. During operation, the second shaft 9 rotates and moves with the first shaft 2, without obstructing the movement trajectory of the spiral blade 3. The rotation of the second shaft 9 generates its own rotation, which continuously stirs and washes the sand and gravel, and lifts the sand and gravel, which helps the fine sand at the bottom of the sand and gravel pile to rise and then flow out from the overflow port.
[0027] Preferably, the scraping mechanism includes a third rotating shaft 12, which passes through one side wall of the overflow trough 4 and is rotatably connected to the other side wall of the overflow trough 4. Several sets of support rods 13 are fixedly connected to the third rotating shaft 12. A scraper 14 is fixedly connected to the end of the support rod 13 away from the third rotating shaft 12. The scraper 14 is parallel to the third rotating shaft 12. The overflow trough 4 is a U-shaped water tank with a semi-circular cross-section at the bottom. The central axis of the third rotating shaft 12 coincides with the central axis of the overflow trough 4. An incomplete gear drive mechanism is connected to one end of the third rotating shaft 12 outside the overflow trough 4. The incomplete gear drive mechanism is used to drive the scraper 14 to perform reciprocating scraping motion on the bottom of the overflow trough 4. The overflow tank 4 is a U-shaped water tank with a semi-circular cross-section at the bottom. A third rotating shaft 12 is rotatably connected inside the overflow tank 4. The end of the third rotating shaft 12 is connected to an incomplete gear drive mechanism, which causes the third rotating shaft 12 to reciprocate in a semi-circular rotation. A support rod 13 is connected to the third rotating shaft 12. A scraper 14 is fixedly connected to the end of the support rod 13 away from the third rotating shaft 12. The scraper 14 continuously scrapes the bottom of the overflow tank 4, causing the fine sand and sludge settled at the bottom of the overflow tank 4 to be lifted up and fully mixed with the waste liquid in the overflow tank 4, ensuring a stable concentration of fine sand in the waste liquid in the overflow tank 4. The U-shaped overflow tank 4 ensures smooth flow of waste liquid in the water tank and eliminates dead corners that would cause fine sand to settle in corners.
[0028] Preferably, the incomplete gear drive mechanism includes a first incomplete gear 17, which is fixedly connected to a third rotating shaft 12. The first incomplete gear 17 is meshed with a second incomplete gear 18, which is rotatably connected to the outer wall of the overflow trough 4. The first incomplete gear 17 and the second incomplete gear 18 are meshed with a rack 15, which is slidably connected to the outer wall of the overflow trough 4. A drive device 20 for driving the second incomplete gear 18 to rotate is fixedly connected to the outer wall of the overflow trough 4. The drive unit 20 drives the second incomplete gear 18 to rotate continuously. The meshing teeth of the second incomplete gear 18 drive the first incomplete gear 17 to rotate half a turn until disengagement. During this process, the second incomplete gear 18 is not connected to the rack 15, while the first incomplete gear 17 is connected to the rack 15 and drives the rack to move. Continuing, the meshing teeth of the second incomplete gear 18 connect to the rack 15, driving the rack 15 to move in the opposite direction. The rack 15 drives the first incomplete gear 17 to rotate in the opposite direction. During this process, the first incomplete gear 17 and the second incomplete gear 18 are not connected. During one rotation of the second incomplete gear 18, the first incomplete gear... 17 rotates clockwise half a turn and then counterclockwise half a turn, realizing the reciprocating rotation of the first incomplete gear 17. During this process, the rack 15 moves back and forth. The rack 15 is slidably connected to the outer wall of the overflow trough 4. A protrusion is provided on the side of the rack 15 near the outer wall of the overflow trough 4. A groove is provided on the outer wall of the overflow trough 4. The protrusion and the groove are interference-fitted. Preferably, the protrusion is a dovetail protrusion and the groove is also dovetail shaped, so that the rack and the overflow trough 4 are slidably connected while not easily disengaging. The drive device 20 includes a second motor fixedly connected to the outer wall of the overflow trough 4. The shaft of the second motor is connected to the second incomplete gear 18 via a belt.
[0029] Preferably, the support rod 13 includes a sleeve 21 and a slide rod 22, which are slidably connected. The end of the sleeve 21 away from the slide rod 22 is fixedly connected to the third rotating shaft 12. A spring is fixedly connected inside the sleeve 21 and is fixedly connected to the slide rod 22. The end of the slide rod 22 away from the spring is fixedly connected to the scraper 14. Through the elastic connection between the sleeve 21 and the slide rod 22, the scraper 14 connected to the slide rod 22 can adapt more flexibly to the bottom shape of the overflow tank 4. At the same time, the spring can ensure that the scraper 14 exerts pressure on the bottom of the overflow tank 4, which helps to scrape off the settled fine sand.
[0030] Preferably, the sleeve 21 has a through groove, and a limiting rod is fixedly connected to the slide rod 22. The limiting rod slides within the through groove. The limiting rod ensures that the slide rod 22 will not completely detach from the sleeve 21, thus ensuring the stability of the device.
[0031] Preferably, the bottom of the scraper 14 is covered with rubber. The soft material can scrape the fine sand settled at the bottom of the overflow tank 4 without damaging the bottom of the overflow tank 4. At the same time, even after the rubber wears down, the scraper 14 can still contact the bottom of the overflow tank 4 and scrape the fine sand under the action of the spring and the slide bar 22 moves outward.
[0032] Preferably, the fine sand recovery device includes a slurry pump 5 and a hydrocyclone 6. The extraction port of the slurry pump 5 is connected to the bottom of the overflow tank 4, and the discharge port of the slurry pump 5 is connected to the inlet of the hydrocyclone 6. Waste liquid in the overflow tank 4 is drawn into the hydrocyclone 6 by the slurry pump 5. The separated fine sand is discharged from the bottom outlet of the hydrocyclone 6, and the separated water and sludge are discharged from the top overflow outlet of the hydrocyclone 6. Since the extraction port of the slurry pump 5 is connected to the bottom of the overflow tank 4, the fine sand recovery device can still operate normally even if the flow rate of the waste liquid at the overflow outlet of the sand washing tank 1 changes.
[0033] Working principle: During use, sand and gravel raw materials enter the sand washing tank 1. The first motor 19 drives the first rotating shaft 2 to rotate, which in turn causes the spiral blades 3 to agitate the sand and gravel and push them upward. The second rotating shaft 9, which is rotatably connected to the first rotating shaft 2, rotates along with it without affecting the rotation of the spiral blades 3. Due to the action of the first bevel gear 8 and the second bevel gear 10, the second rotating shaft 9 rotates around the first rotating shaft 2. The stirring rod 11 on the second rotating shaft 9 agitates and lifts the sand and gravel. The sand and gravel that were originally piled up between adjacent spiral blades 3 can only be pushed upward. The stirring rod 11 helps to disperse the sand and gravel. The process facilitates the washing of sand and gravel at the bottom. Wastewater rich in fine sand and sludge enters overflow tank 4 through the overflow port of sand washing tank 1. The scraping mechanism in overflow tank 4 continuously scrapes the bottom of overflow tank 4, raising and mixing the settled fine sand and sludge to ensure the stability of fine sand concentration in wastewater. This helps the slurry pump 5 to pump normally and avoids damage to the equipment. At the same time, the stability of fine sand concentration in wastewater is conducive to the separation of fine sand by hydrocyclone 6. Wastewater with too high or too low fine sand concentration is not conducive to the normal operation of hydrocyclone 6, and incomplete separation and recovery of fine sand will result in waste.
[0034] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model should be determined by the protection scope of the stated claims.
Claims
1. A sand washing and fine sand recovery integrated machine, comprising a spiral sand washing device and a fine sand recovery device, wherein the spiral sand washing device comprises an inclined sand washing tank (1), a first rotating shaft (2) is rotatably connected inside the sand washing tank (1), a spiral blade (3) is fixedly connected to the first rotating shaft (2), a first motor (19) for driving the first rotating shaft (2) to rotate is provided on the outer wall of the sand washing tank (1), and a discharge port (16) is provided at the bottom of the tank at the high end of the sand washing tank (1), characterized in that: An auxiliary stirring mechanism is provided on the first rotating shaft (2). The auxiliary stirring mechanism is used to stir the sand and gravel between adjacent spiral blades (3). The overflow port of the sand washing tank (1) is connected to an overflow tank (4) through a pipe. A scraping mechanism is provided in the overflow tank (4). The scraping mechanism is used to repeatedly clean the fine sand deposited at the bottom of the overflow tank (4). The overflow tank (4) is connected to a fine sand recovery device through a pipe.
2. The integrated sand washing and fine sand recovery machine according to claim 1, characterized in that: The auxiliary stirring mechanism includes a fixed rod (7), the two ends of which are fixedly connected to the two ends of the sand washing tank (1). The first rotating shaft (2) is a hollow structure. The fixed rod (7) is inside the first rotating shaft (2). The central axis of the fixed rod (7) coincides with the central axis of the first rotating shaft (2). A first bevel gear (8) is fixedly connected to the fixed rod (7). A second rotating shaft (9) passes through the first rotating shaft (2). The second rotating shaft (9) is rotatably connected to the first rotating shaft (2). Stirring rods (11) are fixedly connected to both ends of the second rotating shaft (9). The stirring rods (11) are outside the first rotating shaft (2). A second bevel gear (10) is fixedly connected to the second rotating shaft (9). The first bevel gear (8) and the second bevel gear (10) are meshed together.
3. The integrated sand washing and fine sand recovery machine according to claim 1, characterized in that: The scraping mechanism includes a third rotating shaft (12), which passes through one side wall of the overflow trough (4) and is rotatably connected to the other side wall of the overflow trough (4). Several sets of support rods (13) are fixedly connected to the third rotating shaft (12). A scraper (14) is fixedly connected to the end of the support rod (13) away from the third rotating shaft (12). The scraper (14) is parallel to the third rotating shaft (12). The overflow trough (4) is a U-shaped water trough. The cross-section of the bottom of the overflow trough (4) is semi-circular. The central axis of the third rotating shaft (12) coincides with the central axis of the overflow trough (4). An incomplete gear drive mechanism is connected to one end of the third rotating shaft (12) outside the overflow trough (4). The incomplete gear drive mechanism is used to drive the scraper (14) to perform reciprocating scraping motion on the bottom of the overflow trough (4).
4. The integrated sand washing and fine sand recovery machine according to claim 3, characterized in that: The incomplete gear drive mechanism includes a first incomplete gear (17), which is fixedly connected to a third rotating shaft (12). The first incomplete gear (17) is meshed with a second incomplete gear (18), which is rotatably connected to the outer wall of the overflow trough (4). The first incomplete gear (17) and the second incomplete gear (18) are meshed with a rack (15), which is slidably connected to the outer wall of the overflow trough (4). The outer wall of the overflow trough (4) is fixedly connected with a drive device (20) for driving the second incomplete gear (18) to rotate.
5. The integrated sand washing and fine sand recovery machine according to claim 4, characterized in that: The support rod (13) includes a sleeve (21) and a slide rod (22), which are slidably connected. The end of the sleeve (21) away from the slide rod (22) is fixedly connected to a third rotating shaft (12). A spring is fixedly connected inside the sleeve (21), and the spring is fixedly connected to the slide rod (22). The end of the slide rod (22) away from the spring is fixedly connected to a scraper (14).
6. The integrated sand washing and fine sand recovery machine according to claim 5, characterized in that: A through groove is provided on the sleeve (21), and a limiting rod is fixedly connected to the slide rod (22), and the limiting rod slides in the through groove.
7. The integrated sand washing and fine sand recovery machine according to claim 3, characterized in that: The bottom of the scraper (14) is covered with rubber.
8. The integrated sand washing and fine sand recovery machine according to claim 1, characterized in that: The fine sand recovery device includes a slurry pump (5) and a hydrocyclone (6). The extraction port of the slurry pump (5) is connected to the bottom of the overflow tank (4), and the discharge port of the slurry pump (5) is connected to the inlet of the hydrocyclone (6).