An ultrasonic wheel-type sand washing and fine sand recovery device

Abstract

This invention discloses an ultrasonic wheel-type sand washing and fine sand recovery device, belonging to the field of ultrasonic wheel-type sand washing and fine sand recovery technology. The device includes a feed inlet, a sand washing tank, an ultrasonic transducer, an ultrasonic control generator, a wheel bucket, a wheel bucket drive device, a sand outlet, an overflow trough, a dewatering screen, a wastewater tank, a discharge outlet, a fixed frame, stairs and platforms, a hydrocyclone separator, and a slurry pump. The ultrasonic transducer is installed in corresponding areas of the sand washing tank, overflow trough, and wastewater tank. Under the action of the ultrasonic control generator, an ultrasonic field is formed, utilizing the cavitation effect to loosen and detach soil particles and soft impurities from the surface and pores of the sand and gravel, and to desorb sludge adhering to the inner surface of the tank and tank. The wheel bucket drives the sand and gravel to tumble and grind, then transports it to the dewatering screen for dewatering. The mud-water mixture in the wastewater tank is transported to the hydrocyclone separator by the slurry pump for fine sand recovery. This device integrates deep cleaning, fine sand recovery, and container self-cleaning, which can improve the cleanliness of sand and gravel, reduce container scaling, and decrease the frequency of manual cleaning.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic wheel-type sand washing and fine sand recovery technology, and particularly to an ultrasonic wheel-type sand washing and fine sand recovery device. Background Technology

[0002] As one of the most basic and important raw materials in construction engineering, road construction, water conservancy construction, and concrete product processing, the cleanliness of sand and gravel directly affects the strength, stability, durability, and workability of concrete, mortar, and other building materials. Therefore, in the processing of natural sand, manufactured sand, or weathered sand, a sand washing process is usually required to remove mud, dust, lightweight impurities, and other debris adhering to the surface of the sand and gravel to improve the quality of the finished sand. At the same time, a large amount of fine sand is lost with the water flow during the sand washing process, making fine sand recovery an essential and indispensable part of the sand and gravel processing.

[0003] In existing technologies, wheel-type integrated sand washing and fine sand recovery machines have been widely used in sand and gravel washing operations due to their advantages such as relatively simple structure, relatively stable operation, large processing capacity, and ability to simultaneously handle sand washing and fine sand recovery. This type of equipment typically uses the rotation of a wheel mechanism to drive the sand and gravel to tumble and rub within the washing tank, while water flow washes away some impurities from the sand and gravel surface. Simultaneously, by incorporating dewatering screens, wastewater tanks, slurry pumps, and hydrocyclones, the mud-water mixture generated during the sand washing process is separated, thereby achieving the recycling of fine sand and reducing resource waste caused by the direct loss of fine particulate matter with wastewater.

[0004] However, traditional wheel-type sand washing and fine sand recovery equipment still has significant drawbacks in long-term use. Firstly, traditional equipment relies primarily on the tumbling friction of the wheel buckets and the scouring action of water flow to clean the sand and gravel. It often struggles to completely remove firmly attached soil particles, soft impurities, and small impurities embedded in the pores of the sand and gravel surface. This results in a persistently high mud content in the washed sand and gravel, affecting the quality of the finished sand, especially in applications requiring high cleanliness. Secondly, during continuous operation, mud, fine materials, and impurities tend to gradually deposit on the inner walls of the sand washing tank, the guide surface of the overflow tank, and the bottom or inner walls of the wastewater tank, forming an adhesion layer or even a scale layer. This not only reduces the effective internal volume of the equipment, affecting liquid circulation and material flow, but also increases operating resistance, accelerates component wear, and forces frequent shutdowns for cleaning, increasing labor costs and maintenance burden. Furthermore, existing equipment often presents a contradiction between improving cleaning effectiveness and increasing fine sand recovery rate: if the cleaning effect is enhanced by increasing the intensity of water flow, fine sand is more likely to be lost with the water flow, affecting recovery efficiency; if the water flow velocity is reduced in order to improve the fine sand recovery rate, impurities and mud are more likely to accumulate in the tank and box, which is not conducive to the long-term stable operation of the equipment.

[0005] To address the aforementioned issues, some existing technologies offer improvements, such as modifying the wheel structure, optimizing the flow channel, adding a stirring mechanism, or employing chemical cleaning methods to attempt to improve sand and gravel washing efficiency or reduce internal sediment buildup. However, these solutions mostly offer limited relief for localized problems and cannot simultaneously meet the demands of deep sand and gravel washing, efficient fine sand recovery, and online self-cleaning within the equipment. Furthermore, simply optimizing the mechanical structure is insufficient to effectively remove impurities embedded in the pores of sand and gravel; while additional stirring or chemical cleaning methods can easily lead to new problems such as structural complexity, increased operating costs, inconvenient maintenance, and even environmental pollution. Therefore, providing a wheel-type sand washing and fine sand recovery device that can enhance the removal of impurities from the surface and pores of sand and gravel, reduce sludge deposition in the sand washing tank and wastewater treatment area, balance fine sand recovery efficiency, and improve the stability of continuous equipment operation has become a pressing technical problem in this field. Summary of the Invention

[0006] To address the aforementioned problems, the present invention aims to provide an ultrasonic wheel-type sand washing and fine sand recovery device.

[0007] This invention is achieved through the following technical solution: an ultrasonic wheel-type sand washing and fine sand recovery device, comprising a fixed frame, a feeding port, a sand washing tank, an ultrasonic transducer, an ultrasonic control generator, a wheel bucket, a wheel bucket drive device, a sand outlet, an overflow tank, a dewatering screen, a wastewater tank, a discharge port, a hydrocyclone separator, and a slurry pump; the feeding port is used to introduce the sand and mud mixture into the sand washing tank; the wheel bucket is rotatably disposed in the sand washing tank and is driven by the wheel bucket drive device, used to drive the sand and gravel in the sand washing tank to tumble and wash, and to lift the washed sand and gravel to the sand outlet; the sand outlet is correspondingly disposed with the dewatering screen so that the dewatering screen dewaters the output sand and gravel; The wastewater tank is located below the dewatering screen and is used to collect the fine sand and mud-water mixture that passes through the dewatering screen. The slurry pump is connected to the wastewater tank, and the hydrocyclone separator is connected to the slurry pump for conveying, separating, and recycling the mud-water mixture in the wastewater tank. The overflow trough is connected to the sand washing tank and the wastewater tank, and is used to guide the mud, light impurities, and foreign matter overflowing during the sand washing process. The ultrasonic transducer is located at least in the corresponding area of ​​the sand washing tank and is electrically connected to the ultrasonic control generator to form an ultrasonic field in the sand washing tank. The ultrasonic cavitation effect is used to loosen and remove soil particles and soft impurities from the surface and pores of the sand and gravel.

[0008] Furthermore, several ultrasonic transducers are provided on the outside and bottom of the sand washing tank. The ultrasonic control generator generates ultrasonic signals of a predetermined frequency and power, which are converted into high-frequency mechanical vibration and high-speed micro-jet by the ultrasonic transducers, so that a strong and relatively uniformly distributed ultrasonic field is formed inside the sand washing tank, thereby enhancing the ability to peel off soil, soft particles and impurities in pores attached to the surface of weathered sand.

[0009] Furthermore, the lower part of the wheel bucket is immersed in the sand washing tank, and the wheel bucket rotates under the drive of the wheel bucket drive device, causing the sand and gravel to tumble and rub in the sand washing tank, and together with the water flow and the ultrasonic field, removes the impurities covering the surface of the sand and gravel.

[0010] Furthermore, the overflow trough is located on the upper overflow side of the sand washing tank. As the sand and mud mixture is continuously added to the sand washing tank, the mud, suspended impurities and foreign objects with a smaller specific gravity located in the upper layer are introduced into the wastewater tank through the overflow trough to achieve continuous discharge of impurities during the sand washing process.

[0011] Furthermore, the dewatering screen is used to dewater the sand and gravel output from the wheel bucket through the sand outlet. The dewatered sand and gravel are discharged through the discharge outlet, while fine sand particles, impurities, and water enter the wastewater tank through the screen holes of the dewatering screen.

[0012] Furthermore, several ultrasonic transducers are installed on the outside of the sewage tank to promote the detachment of sludge and impurities attached to the inner surface of the sewage tank under the action of ultrasonic waves, so as to reduce the deposition inside the sewage tank.

[0013] Furthermore, several ultrasonic transducers are provided on the outside of the overflow trough to promote the detachment of sludge and fine materials adhering to the inner surface of the overflow trough under the action of ultrasonic waves, so as to reduce the accumulation inside the overflow trough.

[0014] Furthermore, the slurry pump transports the mud-water mixture in the sewage tank to the hydrocyclone separator, which discharges larger sand particles from the bottom and returns them to the dewatering screen, while lighter impurities and fine aggregates are discharged from the overflow outlet into the sedimentation tank and / or returned to the sewage tank to achieve fine sand recovery.

[0015] Furthermore, the ultrasonic control generator includes a controller and a generator. The controller is used to adjust the output power, output frequency and working time of the ultrasonic control generator to achieve controllable adjustment of the working state of each ultrasonic transducer.

[0016] Furthermore, a matching circuit is provided between the ultrasonic control generator and the ultrasonic transducer. The matching circuit is used for impedance matching to improve the ultrasonic energy transmission efficiency. The ultrasonic control generator can individually or centrally control the ultrasonic transducers located in the corresponding areas of the sand washing tank, overflow tank, and sewage tank.

[0017] The beneficial effects of this invention are as follows: By organically combining ultrasonic enhanced cleaning technology with a traditional wheel-type sand washing and fine sand recovery structure, this invention enables the ultrasonic cavitation effect and the wheel tumbling friction to work synergistically in the sand and gravel washing process. This not only enhances the removal of impurities attached to the sand and gravel surface but also improves the peeling effect on soil particles and soft impurities within the sand and gravel pores, thereby effectively improving the cleanliness of the finished sand. Simultaneously, by installing ultrasonic transducers in the corresponding areas of the overflow trough and wastewater tank, online desorption and cleaning of sludge, fine materials, and impurities attached to the inner surface of the containers can be performed, reducing scale buildup inside the tank and chamber and decreasing the frequency of equipment downtime for cleaning. Furthermore, the fine sand recovery path, composed of a dewatering screen, wastewater tank, slurry pump, and hydrocyclone separator, can improve the cleaning effect while ensuring fine sand recovery efficiency. Therefore, this invention combines deep cleaning, fine sand recovery, and equipment self-cleaning functions, possessing strong practical value and promotional significance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an elevation view of the present invention.

[0020] Figure 3 This is a top view of the present invention.

[0021] Figure 4 This is a schematic diagram showing the connection between the ultrasonic control generator and the transducer of the present invention. Detailed Implementation

[0022] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0023] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0024] like Figures 1-4 As shown, the ultrasonic wheel-type sand washing and fine sand recovery device of the present invention mainly includes 11, a feeding port, 12, a sand washing tank, 13, an ultrasonic transducer, 14, an ultrasonic control generator, 15, a wheel bucket, 16, a wheel bucket drive device, 17, a sand outlet, 18, an overflow tank, 19, an ultrasonic transducer, 21, a dewatering screen, 22, a wastewater tank, 23, a discharge port, 24, an ultrasonic transducer, 25, a fixed frame, 26, stairs and platforms, 31, a hydrocyclone separator, and 32, a slurry pump.

[0025] The sand and mud mixture enters the sand washing tank 12 through the feed port 11. An appropriate amount of washing water is pre-added to the sand washing tank 12 so that the sand and mud mixture can form a suitable mixing state for washing. The sand washing tank 12 serves as the main sand washing area, used to contain the sand and mud mixture and, in conjunction with the wheel bucket 15 and ultrasonic device, completes the sand and gravel washing operation.

[0026] Several ultrasonic transducers 13 are installed on the outside and bottom of the sand washing tank 12. When the equipment starts operating, the ultrasonic control generator 14 is turned on. The ultrasonic control generator 14 generates ultrasonic signals of specific frequency and power and transmits them to the ultrasonic transducers 13. The ultrasonic transducers 13 convert the electrical signals into high-frequency mechanical vibrations and high-speed microjets, generating a strong ultrasonic field in the sand washing tank 12. Utilizing the cavitation effect of ultrasound, soil particles and soft particles on the surface and in the pores of the weathered sand are loosened and detached from the sand. At the same time, the ultrasonic action can also detach sand, impurities, etc., attached to the inner surface of the sand washing tank 12 and let them enter the solution, thereby achieving the effect of enhanced cleaning of sand and gravel and keeping the inner surface of the container clean.

[0027] The wheel bucket 15 is installed inside the sand washing tank 12 and connected to the wheel bucket drive device 16. Under the action of the wheel bucket drive device 16, the wheel bucket 15 rotates mechanically, causing the sand and gravel in the sand washing tank 12 to tumble and rub against each other, making the sand and gravel grind against each other, and with the help of water flow to wash away the impurities attached to the surface. Since there is also an ultrasonic field generated by the ultrasonic transducer 13 in the sand washing tank 12, the tumbling and friction action of the wheel bucket 15 is combined with the ultrasonic cavitation cleaning action, making it easier for the mud, impurities and some soft particles embedded in the pores on the surface of the sand and gravel to be removed, thus improving the cleaning effect.

[0028] As the sand and mud mixture is continuously added, the slurry on the upper surface of the sand washing tank 12 overflows into the overflow tank 18, carrying away impurities and lighter foreign objects, which then enter the wastewater tank 22. The overflow tank 18 effectively removes lightweight impurities and slurry separated during the sand washing process, preventing them from remaining in the sand washing tank 12 and affecting the washing effect.

[0029] Under the action of the bucket wheel drive device 16, the bucket wheel 15 continuously scoops out the washed sand from the sand washing tank 12. After the bucket wheel 15 rotates and reaches the sand outlet 17, it conveys the sand to the dewatering screen 21. The dewatering screen 21 dewaters the washed sand and gravel, removing the water from the sand and conveying it forward to the discharge outlet 23 for discharge, thereby obtaining the washed finished sand.

[0030] During the operation of the dewatering screen 21, fine sand particles, impurities, and water enter the wastewater tank 22 through the mesh of the dewatering screen 21. The wastewater tank 22 is used to collect the fine sand and mud-water mixture that passes through the screen. The mud-water mixture in the wastewater tank 22 is pumped to the hydrocyclone separator 31 by the slurry pump 32. In the hydrocyclone separator 31, larger sand particles are separated and discharged from the bottom, and together with the material discharged from the wheel bucket 15, are discharged back onto the dewatering screen 21. The remaining lighter impurities and fine aggregates are discharged into the wastewater tank 22 and then discharged into the sedimentation tank through the overflow port. Through the above settings, the recovery of fine sand is achieved, reducing the problem of fine sand loss with wastewater.

[0031] Several ultrasonic transducers 19 are installed below the overflow trough 18, and several ultrasonic transducers 24 are installed below the sewage tank 22. The ultrasonic control generator 14 that controls both is activated at fixed intervals to prevent impurities or fine materials from accumulating and adhering to the inside of the overflow trough 18 or the sewage tank 22. Specifically, the ultrasonic transducers 19 and 24 can also generate ultrasonic fields during operation, using the cavitation effect to remove sludge, fine materials, and other impurities adhering to the inner surface of the overflow trough 18 and the inner surface of the sewage tank 22, thereby reducing the possibility of scaling and accumulation during long-term operation of the equipment.

[0032] The ultrasonic control generator 14 can control the ultrasonic transducers 13, 19, and 24 individually or centrally, thereby adjusting the ultrasonic waves in the sand washing tank 12, overflow tank 18, and wastewater tank 22 according to different working needs. By setting up the ultrasonic control generator 14, the working frequency, power, and duration of the ultrasonic waves can be adjusted according to the mud content of the sand and gravel, the processing capacity, and the equipment operating status, thereby improving the applicability and operational stability of the device.

[0033] The fixed frame 25 is used to secure various pieces of equipment, ensuring a stable overall structure for components such as the sand washing tank 12, bucket wheel 15, dewatering screen 21, wastewater tank 22, hydrocyclone separator 31, and slurry pump 32. The stairs and platform 26 facilitate staff inspection and observation of equipment operation, and also allow for routine maintenance and repair of each component.

[0034] The beneficial effects of this invention are as follows: By adding an ultrasonic device to the traditional wheel-type sand washing and fine sand recovery device, the ultrasonic cavitation cleaning action is combined with the mechanical tumbling cleaning action of the wheel bucket. This not only improves the removal effect of impurities on the surface and in the pores of the sand and gravel, but also cleans the sludge and fine materials attached to the inner surfaces of the sand washing tank 12, overflow tank 18, and sewage tank 22, thereby reducing the accumulation and scaling inside the equipment. Simultaneously, the dewatering screen 21, sewage tank 22, slurry pump 32, and hydrocyclone separator 31 enable fine sand recovery, making this invention an integrated system of deep sand and gravel cleaning, fine sand recovery, and container self-cleaning functions, thus possessing good practicality.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An ultrasonic wheel-type sand washing and fine sand recovery device, characterized in that, It includes a fixed frame, a feed inlet, a sand washing tank, a wheel bucket, a wheel bucket drive device, a sand outlet, a dewatering screen, a wastewater tank, a slurry pump, a hydrocyclone separator, and an ultrasonic device; The discharge port is used to introduce the sand and mud mixture into the sand washing tank; The bucket wheel is rotatably disposed in the sand washing tank and is connected to the bucket wheel drive device for driving the sand and gravel in the sand washing tank to tumble and clean, and lifting the cleaned sand and gravel to the sand outlet. The dewatering screen is installed on the discharge path of the sand outlet and is used to dewater the sand and gravel from the wheel bucket. The wastewater tank is located below the dewatering screen and is used to collect the fine sand and mud-water mixture that passes through the dewatering screen. The slurry pump is connected to the sewage tank, and the hydrocyclone separator is connected to the slurry pump, used for conveying and separating the mud-water mixture in the sewage tank for recycling; The ultrasonic device includes an ultrasonic control generator and multiple ultrasonic transducers. The multiple ultrasonic transducers are at least located in the corresponding area of ​​the sand washing tank and are electrically connected to the ultrasonic control generator to form an ultrasonic field in the sand washing tank. The ultrasonic cavitation effect is used to loosen and remove soil particles and soft impurities on the surface and in the pores of the sand. The device also includes an overflow trough connected to the sand washing tank and the wastewater tank, which is used to divert mud, light impurities and foreign objects that overflow during the sand washing process.

2. The ultrasonic wheel-type sand washing and fine sand recovery device according to claim 1, characterized in that, The ultrasonic transducers, located in the corresponding area of ​​the sand washing tank, are installed on the outer side wall and bottom of the sand washing tank and are distributed at intervals along the length and / or width of the sand washing tank to form an ultrasonic field covering the sand washing working area inside the sand washing tank.

3. The ultrasonic wheel-type sand washing and fine sand recovery device according to claim 1, characterized in that, The lower part of the wheel bucket is immersed in the sand washing tank. The wheel bucket rotates under the drive of the wheel bucket drive device to drive the sand and gravel to roll and rub in the sand washing tank, and in conjunction with water flow rinsing and the ultrasonic field to remove impurities covering the surface of the sand and gravel.

4. The ultrasonic wheel-type sand washing and fine sand recovery device according to claim 1, characterized in that, The overflow trough is located on the upper overflow side of the sand washing tank. As the sand and mud mixture is continuously added to the sand washing tank, the mud, impurities and foreign objects with a smaller specific gravity located on the upper surface are introduced into the sewage tank through the overflow trough.

5. The ultrasonic wheel-type sand washing and fine sand recovery device according to claim 1, characterized in that, The dewatering screen is used to dewater the sand and gravel conveyed by the wheel bucket through the sand outlet. The dewatered sand and gravel are discharged through the discharge outlet, while fine sand particles, impurities and water enter the wastewater tank through the screen holes of the dewatering screen.

6. The ultrasonic wheel-type sand washing and fine sand recovery device according to claim 1, characterized in that, Multiple ultrasonic transducers are installed on the outside of the sewage tank to promote the detachment of sludge and impurities adhering to the inner surface of the sewage tank under the action of ultrasonic waves.

7. The ultrasonic wheel-type sand washing and fine sand recovery device according to claim 1, characterized in that, Multiple ultrasonic transducers are installed on the outside of the overflow trough to promote the detachment of sludge and fine materials adhering to the inner surface of the overflow trough under the action of ultrasonic waves, thereby reducing the accumulation inside the trough.

8. The ultrasonic wheel-type sand washing and fine sand recovery device according to claim 1, characterized in that, The slurry pump transports the mud-water mixture in the sewage tank to the hydrocyclone separator, which discharges larger sand particles from the bottom and returns them to the dewatering screen, while lighter impurities and fine aggregates are discharged from the overflow outlet into the sedimentation tank and / or returned to the sewage tank.

9. The ultrasonic wheel-type sand washing and fine sand recovery device according to claim 1, characterized in that, The ultrasonic control generator includes a controller and a generator. The controller is used to adjust the output power, output frequency and working time of the ultrasonic control generator to achieve controllable adjustment of the working state of each ultrasonic transducer.

10. The ultrasonic wheel-type sand washing and fine sand recovery device according to claim 9, characterized in that, A matching circuit is provided between the ultrasonic control generator and the ultrasonic transducer. The matching circuit is used to perform impedance matching to improve the ultrasonic transmission efficiency. Furthermore, the ultrasonic control generator can individually or centrally control the ultrasonic transducers located in the corresponding areas of the sand washing tank, overflow tank, and sewage tank.

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