A wet separation device for impurities in machine-made sand raw materials

Abstract

The present invention relates to the technical field of machine-made sand screening devices, and more particularly to a wet separation device for machine-made sand raw material impurities, comprising a first roller assembly; a second roller assembly, wherein the first roller assembly is disposed within the second roller assembly, the first roller assembly and the second roller assembly are coaxially and tilted, and the second roller assembly is mounted on a frame via a rolling support assembly; a reverse drive assembly, wherein both the first and second roller assemblies are connected to the reverse drive assembly, and the reverse drive assembly drives the first and second roller assemblies to rotate in opposite directions; a feed assembly, wherein the feed assembly is mounted on the frame, and the feed assembly discharge end is located within the first roller assembly; and a spray assembly, wherein the spray assembly is mounted on the frame, and the spray end of the spray assembly is located within the first roller assembly. The present invention facilitates the removal of dust from machine-made sand.

Description

Technical Field

[0001] The present invention relates to the technical field of machine-made sand screening devices, in particular to a device for wet separation of machine-made sand raw material impurities. Background Art

[0002] Artificial sand is rock particles with a particle size of less than 4.75 mm made through mechanical crushing, screening and other processes. The raw materials are mainly hard rocks such as granite and limestone.

[0003] As a core material for modern construction, the development of machine-made sand has not only alleviated the problem of resource shortages, but also promoted technological progress and green transformation in the industry. Machine-made sand has the characteristics of high hardness, good wear resistance, high compressive strength, and stable chemical properties, and can meet the needs of different fields. Compared with natural sand, it can reduce the exploitation of natural resources and protect the ecological environment. The production process of machine-made sand is controllable, and the particle size and gradation of sand can be adjusted according to demand. After the machine-made sand is crushed, the dust needs to be removed, and the machine-made sand has many edges and corners and a rough surface, which requires optimization through a shaping process. For example, the prior application with publication number CN216779062U discloses a machine-made sand dust removal device for removing dust from the machine-made sand. However, after the dust is removed, the machine-made sand must be shaped to improve the surface smoothness of the machine-made sand. This requires the addition of additional shaping equipment, which increases the manufacturing cost of the machine-made sand.

[0004] Therefore, those skilled in the art are committed to developing a wet separation device for impurities in machine-made sand raw materials, which is not only beneficial for removing dust in machine-made sand, but also for shaping the surface of machine-made sand. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a wet separation device for impurities in machine-made sand raw materials, which is not only conducive to removing dust in the machine-made sand, but also used for surface shaping of the machine-made sand.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] A wet separation device for impurities in machine-made sand raw materials, comprising

[0008] a first roller assembly;

[0009] a second roller assembly, wherein the first roller assembly is disposed inside the second roller assembly, and the first roller assembly and the second roller assembly are coaxially and tiltedly disposed, and the second roller assembly is mounted on the frame via a rolling support assembly;

[0010] A reverse drive assembly, wherein the first roller assembly and the second roller assembly are both connected to the reverse drive assembly, and the reverse drive assembly drives the first roller assembly and the second roller assembly to rotate in opposite directions;

[0011] A feeding assembly, the feeding assembly is mounted on the frame, and a discharge end of the feeding assembly is located in the first roller assembly;

[0012] A spray assembly is installed on the frame, and the spray end of the spray assembly is located in the first drum assembly.

[0013] The beneficial effects of adopting the above scheme are: the reverse drive component drives the first drum component and the second drum component to rotate, so that the machine-made sand produces a strong tumbling and friction effect in the drum, and the water flow impact of the spray component can more effectively remove dust and other impurities in the machine-made sand, improve the separation efficiency and quality, and ensure that the purity of the machine-made sand meets the requirements of the construction industry and other industries.

[0014] At the same time, when the machine-made sand is screened in the first drum assembly, the mutual friction and collision between the particles and the flushing of the water flow help to grind and shape the edges and corners of the machine-made sand to a certain extent;

[0015] The first drum assembly is also used to screen the manufactured sand.

[0016] On the basis of the above technical solution, the present invention can also be improved as follows.

[0017] Furthermore, the first roller assembly includes a first roller, the outer circumference of the first roller has a plurality of first discharge holes arranged at intervals, and grinding balls are placed in the first roller;

[0018] An end cover is installed at the end of the first roller and close to the reverse drive assembly. The end cover is connected to a drive shaft, and the drive shaft is connected to the reverse drive assembly.

[0019] The beneficial effect of adopting the above-mentioned further scheme is that the first discharge hole facilitates the discharge of machine-made sand that meets the particle size requirements and enters the drum assembly, and the machine-made sand with larger particles is left in the first drum and is further ground into small particles under the action of subsequent grinding balls, thereby preventing large particles from entering the second drum assembly.

[0020] Furthermore, stirring bumps are provided on the outer periphery of the first drum.

[0021] The beneficial effect of adopting the above-mentioned further scheme is that the stirring protrusions cause the machine-made sand to produce a stronger tumbling and stirring effect in the second drum as the drum rotates, thereby enhancing the friction between the machine-made sand particles, making it more conducive to removing surface impurities, and also helping to further polish the edges and corners of the particles, thereby improving the surface smoothness of the machine-made sand.

[0022] Furthermore, the second roller assembly includes a second roller, the outer circumference of the second roller has a plurality of second discharge holes arranged at intervals, and the diameter of the second discharge holes is smaller than the diameter of the first discharge hole;

[0023] The end of the second roller is connected to the reverse drive assembly through a connecting block.

[0024] The beneficial effect of adopting the above further solution is that after the small particles of machine-made sand are screened into the second drum, the reverse drive assembly drives the first drum and the second drum to rotate in opposite directions, so that the small particles of machine-made sand are further ground into machine-made sand with a particle size that meets the requirements;

[0025] The first and second rollers rotate in opposite directions to grind the edges and corners of the machine-made sand surface smooth, and the dust generated by grinding is carried away by the washing component;

[0026] At the same time, the first roller and the second roller rotating in opposite directions ensure the stability of the entire separation and shaping process.

[0027] Furthermore, the rolling support assembly includes rolling support wheels, a plurality of the rolling support wheels are connected to the second roller assembly, and the rolling support wheels are installed on the frame through a mounting bracket.

[0028] The above-mentioned further solution has the following beneficial effects: the rolling support wheels separately support the second roller assembly, evenly distributing the weight and forces generated by the second roller assembly during operation, improving support stability, reducing vibration, ensuring smooth operation of the device, and extending its service life. The mounting bracket facilitates installation, adjustment, and replacement of the rolling support wheels, facilitating maintenance and inspection, and ensuring long-term stable operation of the device.

[0029] Furthermore, a water collecting trough is installed between the second roller assembly and the frame, the rolling support assembly is installed on the water collecting trough, and a conveying trough is provided at the output end of the water collecting trough;

[0030] A water baffle is further provided between the output end of the second drum assembly and the water collecting trough.

[0031] The beneficial effects of adopting the above further solution are: the water collection tank can collect the wastewater generated during the separation process, which is convenient for subsequent centralized treatment or recycling, thereby improving the utilization rate of water resources, reducing production costs, and keeping the working environment clean;

[0032] The water baffle can prevent water from splashing at the output end of the drum and separate the wastewater from the finished machine-made sand to avoid subsequent mixing and the generation of new impurities.

[0033] Furthermore, the reverse drive assembly includes a drive gear, which is mounted in the middle of the drive shaft, the drive gear is meshed with a plurality of planetary gears, the planetary gears are further meshed with an inner ring gear, and the inner ring gear is connected to the connecting block;

[0034] A pulley is installed at the end of the driving shaft, and the pulley is connected to the output end of the reducer through a belt. The reducer is also connected to a power motor, and the power motor is installed on the frame.

[0035] The beneficial effects of adopting the above further solution are: the meshing transmission of the driving gear, the planetary gear and the inner ring gear can realize the precise control of the reverse rotation of the first roller assembly and the second roller assembly, ensure the accurate relative motion relationship between the two rollers, and ensure the separation and shaping effect;

[0036] The combination of pulleys, belts, reducers and power motors can transfer the power of the power source to the drive shaft smoothly and efficiently. The speed can be adjusted through the reducer to adapt to different production needs and ensure reliable operation of the device.

[0037] Furthermore, the sides of the plurality of planetary gears are respectively connected to a fixing plate via a connecting shaft, and a middle portion of the fixing plate has a middle hole for the driving shaft to pass through.

[0038] The beneficial effect of adopting the above further solution is that the fixed plate can provide stable support and limit the planetary gears, preventing them from excessive shaking during transmission, improving transmission stability, and thus ensuring the smooth operation of the entire drive system and improving the working reliability of the device.

[0039] Furthermore, the feeding assembly includes a feeding funnel, the feeding funnel is mounted on the frame, the output end of the feeding funnel is provided with a conveying trough, and the output end of the conveying trough is located in the first roller assembly;

[0040] The spray assembly includes a spray pipe, the spray pipe is located in the first drum assembly, the spray pipe is provided with a spray hole, and the spray pipe is connected to a water supply device.

[0041] The beneficial effect of adopting the above further solution is that the conveying trough conveys the machine-made sand smoothly and evenly into the first roller assembly, ensuring the continuity and stability of feeding, avoiding the adverse effect of uneven feeding on the separation effect, and facilitating the efficient operation of the entire device;

[0042] The spray pipe is located in the first drum assembly. The spray holes on it can spray water evenly on the surface of the machine-made sand, ensuring that each particle can be fully rinsed, effectively removing impurities and improving the separation effect. The spray pipe is connected to the water supply device and can obtain water stably, ensuring the continuous and normal operation of the spray system and providing support for the stable operation of the device.

[0043] Furthermore, a first hinge is provided on the inner gear ring, and two first hinges are symmetrically arranged. The first hinge is hinged to a second hinge, and the other end of the second hinge is connected to the second roller.

[0044] The first discharge holes and the second discharge holes are arranged alternately, and high-pressure spray water is sprayed from the spray holes, passes through the first discharge holes and hits the inner wall of the second drum, so that the second drum rotates around the first hinge.

[0045] The beneficial effect of adopting this further solution is that, to reduce dust generated during machine-made sand screening, atomized water droplets are introduced during screening. These droplets absorb dust particles through Brownian diffusion and inertial collisions, causing them to increase in weight and settle. To improve the atomization of the spray water, high-pressure water is typically used in conjunction with atomizing pores, but these pores are prone to clogging over time. Sometimes, to reduce pore clogging, the diameter of the atomizing pores is increased. However, using large diameter atomizing pores can reduce the atomization performance of the spray water.

[0046] In this solution, since the first roller and the second roller rotate concentrically in opposite directions, the high-pressure water sprayed from the spray hole hits the inner wall of the first roller and rebounds, converting the kinetic energy of the spray water into the surface energy required for the expansion of the liquid film, forming an extremely thin water layer, increasing the surface area, and thus achieving atomization. The atomized spray water is mixed with the machine-made sand and adsorbs the dust particles through the Brownian diffusion effect and inertial collision, causing them to increase in weight and settle, thereby improving the dust removal effect and reducing the blockage of the water outlet.

[0047] The spray holes on the spray pipe are arranged along its length and spray upward, corresponding to the first discharge hole. During the rotation of the first drum, high-pressure spray water is ejected intermittently from the spray holes. When the high-pressure spray water from the spray holes passes through the first discharge hole, due to the staggered arrangement of the first and second discharge holes, the high-pressure spray water will collide with the inner wall of the second drum. Under the impact of the high-pressure spray water, the second drum rotates around the first hinge, causing it to vibrate up and down periodically. During the vibration process, impurities or fine machine-made sand that are clogged in the second discharge hole will be affected by the vibration and effectively shaken off. This not only greatly reduces the possibility of the second discharge hole being clogged, but also causes the gap between the outer wall of the first drum and the inner wall of the second drum to change periodically. This periodic change can produce streamline folding, expand the traversal range of the machine-made sand, and enhance the stirring effect of the machine-made sand through chaotic disturbance. At the same time, under the action of the stirring protrusions, the ability of the machine-made sand to mix and diffuse is increased, which is conducive to quickly grinding the edges of the machine-made sand to be smoother, making the particle shape of the machine-made sand more regular and improving its quality. Furthermore, the high-pressure spray water ejected from the first discharge hole will collide with the inner wall of the second drum, so that the atomized spray water further contacts the machine-made sand between the first and second drums and absorbs dust particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a front view structural diagram of a wet separation device for impurities in machine-made sand raw materials according to an embodiment of the present invention;

[0049] Figure 2 This is a side structural diagram of a wet separation device for impurities in machine-made sand raw materials according to an embodiment of the present invention;

[0050] Figure 3 This is a structural schematic diagram of the first roller assembly according to embodiment 1 of the present invention;

[0051] Figure 4 This is a schematic structural diagram of a second roller assembly and a reverse drive device according to a first embodiment of the present invention;

[0052] Figure 5 This is a rear view structural diagram of a reverse driving device according to a first embodiment of the present invention;

[0053] Figure 6 This is a structural diagram of embodiment 2 of the present invention.

[0054] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0055] 1. First roller assembly; 2. Second roller assembly; 3. Rolling support assembly; 4. Frame; 5. Reverse drive assembly; 6. Feed assembly; 7. Spray assembly; 8. First roller; 9. First discharge hole; 10. End cover; 11. Drive shaft; 12. Stirring bump; 13. Second roller; 14. Second discharge hole; 15. Connecting block; 16. Rolling support wheel; 17. Mounting bracket; 18. Water collecting trough; 19. Conveyor trough; 20. Water baffle; 21. Drive gear; 22. Planetary gear; 23. Inner ring gear; 24. Pulley; 25. Reducer; 26. Power motor; 27. Belt; 28. Fixed plate; 29. ​​Middle hole; 30. Feed hopper; 31. Spray pipe; 32. Conveyor trough; 33. First hinge; 34. Second hinge. DETAILED DESCRIPTION

[0056] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0057] In the description of the present invention, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "peripheral", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred system or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0058] In the description of the present invention, “a plurality of” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0059] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0060] Example 1

[0061] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, a wet separation device for impurities in machine-made sand raw materials includes:

[0062] First roller assembly 1;

[0063] The second roller assembly 2, the first roller assembly 1 is arranged in the second roller assembly 2, and the first roller assembly 1 and the second roller assembly 2 are arranged coaxially and tilted, and the second roller assembly 2 is installed on the frame 4 through the rolling support assembly 3;

[0064] A reverse drive assembly 5, wherein the first roller assembly 1 and the second roller assembly 2 are both connected to the reverse drive assembly 5, and the reverse drive assembly 5 drives the first roller assembly 1 and the second roller assembly 2 to rotate in opposite directions;

[0065] The feeding assembly 6 is mounted on the frame 4, and the discharge end of the feeding assembly 6 is located in the first roller assembly 1;

[0066] The spray assembly 7 is installed on the frame 4, and the spray end of the spray assembly 7 is located in the first drum assembly 1.

[0067] In the present invention, the reverse drive component 5 drives the first roller component 1 and the second roller component 2 to rotate, so that the machine-made sand produces a strong tumbling and friction effect in the drum. Combined with the water flow impact of the spray component 7, it can more effectively remove dust and other impurities in the machine-made sand, improve the separation efficiency and quality, and ensure that the purity of the machine-made sand meets the requirements of the construction industry and other industries.

[0068] like Figure 1 、 Figure 2 and Figure 3As shown, in some embodiments, the first roller assembly 1 includes a first roller 8 having a plurality of first discharge holes 9 spaced apart on its periphery. These first discharge holes 9 allow sand meeting the required particle size to be discharged smoothly and enter the second roller assembly 2. Grinding balls are placed within the first roller 8. During rotation, these grinding balls grind the sand, not only smoothing out the edges and corners of the sand but also further grinding large sand particles into smaller ones, optimizing the shape and size of the sand particles. The first roller 8 is also provided with stirring bumps 12 on its periphery. These bumps create a more intense tumbling and stirring effect within the second roller assembly 2 as the sand rotates. This enhances friction between the sand particles, facilitates the removal of surface impurities, and further polishes the edges and corners of the sand particles, improving the surface finish of the sand.

[0069] An end cover 10 is installed at the end of the first roller 8 and close to the reverse drive assembly 5, so that the machine-made sand can only be discharged from the first discharge hole 9. A drive shaft 11 is connected to the end cover 10, and the drive shaft 11 is connected to the reverse drive assembly 5.

[0070] like Figure 1 、 Figure 2 and Figure 4 As shown, in another embodiment, the second drum assembly 2 includes a second drum 13 having multiple spaced-apart second discharge holes 14 on its outer circumference. The diameter of the second discharge holes 14 is smaller than that of the first discharge hole 9. The second discharge holes 14 are primarily used to discharge wastewater. The end of the second drum 13 is connected to the reverse drive assembly 5 via a connecting block 15. After the small-particle manufactured sand is screened into the second drum 13, the reverse drive assembly 5 causes the first and second drum assemblies 1 and 2 to rotate in opposite directions, further grinding the small-particle manufactured sand within the second drum 13 until it is finally ground into manufactured sand of the required particle size. Simultaneously, the counter-rotating first and second drums 8 and 13 smooth the edges of the manufactured sand surface, and dust generated during the grinding process is removed by the flushing assembly and discharged through the second discharge holes 14. Furthermore, this counter-rotating arrangement helps ensure the stability of the entire separation and shaping process.

[0071] The rolling support assembly 3 includes rolling support wheels 16, multiple of which are connected to the second roller assembly 2. These wheels 16 are mounted to the frame 4 via mounting brackets 17. These wheels evenly distribute the weight of the second roller assembly 2 and the impact forces generated during operation, effectively improving support stability and reducing vibration, thereby ensuring smooth operation and extending the service life of the device. Mounting brackets 17 facilitate installation of the rolling support wheels 16 and facilitate subsequent adjustment and replacement, effectively ensuring the long-term stable operation of the device. In other embodiments, an elastic support assembly is also installed between the mounting brackets 17 and the frame 4.

[0072] In the embodiment, a water collecting trough 18 is also installed between the second roller assembly 2 and the frame 4, and the rolling support assembly 3 is installed on the water collecting trough 18. The water collecting trough 18 is arranged parallel to the second roller 13. A conveying trough 19 is provided at the output end of the water collecting trough 18. The water collecting trough 18 is used to collect waste water discharged from the second roller 13 and convey it to the conveying trough 19. A water baffle 20 is also provided between the output end of the second roller assembly 2 and the water collecting trough 18. The water baffle 20 prevents water from splashing at the output end of the roller, and effectively separates the wastewater from the finished machine-made sand product to avoid the generation of new impurities after the two are mixed, which affects the quality of the final product.

[0073] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, in this embodiment, the reverse drive assembly 5 includes a drive gear 21 mounted in the middle of the drive shaft 11. The drive gear 21 is meshed with multiple planetary gears 22. In a specific embodiment, the drive gear 21 meshes with three planetary gears 22. To reduce excessive shaking of the planetary gears 22 and thus improve the stability of the entire transmission system, the multiple planetary gears 22 are connected to a fixing plate 28 on their sides via connecting shafts. The fixing plate 28 has a central hole 29 for the drive shaft 11 to pass through. The planetary gears 22 are also meshed with an inner ring gear 23, which is connected to a connecting block 15. In a specific embodiment, the inner ring gear 23 has three connecting blocks 15 evenly spaced apart, which connect to the second roller 13, thereby improving the connection strength between the inner ring gear 23 and the second roller 13. A pulley 24 is mounted on the end of the drive shaft 11. The pulley 24 is connected to the output end of a reducer 25 via a belt 27. The reducer 25 is also connected to a power motor 26, which is mounted on the frame 4.

[0074] The control component (not shown in the figure) controls the rotation of the power motor 26. The rotation of the power motor 26 drives the reducer 25, the belt 27 and the pulley 24 to rotate in sequence. The rotation of the pulley 24 drives the driving gear 21, the driving shaft 11 and the first roller 8 to rotate. At the same time, the rotation of the driving gear 21 drives the planetary gear 22 to rotate and drives the inner ring gear 23 to rotate in the opposite direction, thereby driving the second roller 13 to rotate in the opposite direction.

[0075] like Figure 1 、 Figure 2 As shown, in one embodiment, the feeding assembly 6 includes a feeding funnel 30, which is mounted on the frame 4. A conveying trough 32 is provided at the output end of the feeding funnel 30, and the output end of the conveying trough 32 is located in the first roller assembly 1. The conveying trough 32 is conducive to conveying the machine-made sand into the first roller assembly 1 in a smooth and uniform manner, thereby ensuring the continuity and stability of the feeding process.

[0076] The spray assembly 7 includes a spray pipe 31, which is located in the first drum assembly 1. The spray pipe 31 has a spray hole, which is conducive to evenly spraying clean water into the first drum assembly 1, and the spray pipe 31 is connected to a water supply device (not shown in the figure). The water supply device can stably provide water for the spray system to ensure the continuous and normal operation of the spray assembly 7 throughout the entire production process, providing a solid guarantee for the stable operation of the device, and ensuring that the separation and shaping process is not affected by insufficient water supply.

[0077] The working principle of the present invention is as follows: manufactured sand raw material is first transported to a feed hopper 30 via a conveyor belt (not shown), then into a conveyor trough 32. Guided by this trough, it smoothly enters the interior of the first drum assembly 1. Simultaneously, the spray pipe 31 of the spray assembly 7 begins operating, evenly spraying water onto the surface of the manufactured sand through the spray holes. The impact of the water not only helps loosen and separate impurities such as dust from the manufactured sand, but also interacts with the tumbling and friction generated by the rotation of the first and second drum assemblies 1 and 2 to create a highly efficient impurity removal environment.

[0078] As power motor 26 rotates, driven by reverse drive assembly 5, first and second roller assemblies 1 and 2 begin rotating in opposite directions. This reverse rotation causes the machine-made sand to experience intense tumbling and friction within first roller assembly 1, increasing the collision and friction between particles and helping to remove surface impurities. Simultaneously, the grinding balls within first roller 8 and the agitation bumps 12 on its periphery also actively participate in this process, further enhancing the friction and tumbling effects between particles, polishing and shaping the edges and corners of the machine-made sand to a certain extent, improving its surface finish.

[0079] Machine-made sand that meets the particle size requirements is discharged from the first drum assembly 1 through the first discharge port 9 and smoothly enters the second drum assembly 2. Larger particles of machine-made sand, however, remain in the first drum 8 and are gradually ground into smaller particles by the continuous grinding action of the grinding balls. This prevents large particles of machine-made sand from entering the second drum assembly 2 and adversely affecting subsequent processing.

[0080] The machine-made sand entering the second drum assembly 2 continues to experience the grinding and tumbling action brought about by the reverse rotation in the second drum 13. The edges and corners on the surface of the machine-made sand are further ground smooth, thereby improving the overall quality of the machine-made sand.

[0081] Wastewater generated during the separation and shaping process flows by gravity to a sump 18 and is transported through a conveyor trough 19 to subsequent treatment or recovery systems. A water baffle 20 effectively prevents water from splashing at the drum output and clearly separates the wastewater from the finished manufactured sand, preventing mixing and ensuring the purity of the finished manufactured sand.

[0082] Example 2

[0083] like Figure 6 As shown, the only difference between Example 2 and Example 1 is that the connecting block 15 is replaced by a first hinge 33, the two first hinges 33 are symmetrically arranged along the center of the inner ring gear 23, the first hinge 33 is hinged with a second hinge 34, the other end of the second hinge 34 is connected to the second roller 13, the first discharge hole 9 and the second discharge hole 14 are staggered, and high-pressure spray water is sprayed from the spray hole through the first discharge hole 9 and hits the inner wall of the second roller 13, so that the second roller 13 rotates around the first hinge 33.

[0084] Specifically, when high-pressure water sprayed from the spray holes passes through the first discharge hole 9 and collides with the inner wall of the second roller 13, the second roller 13 rotates around the first hinge 33 under the impact of the high-pressure water. Due to the two symmetrically arranged first hinges 33, the second roller 13 can only vibrate up and down. During the vibration process, impurities or fine machine-made sand stuck in the second discharge hole 14 are affected by the vibration and effectively shaken off. This also causes the gap between the outer wall of the first roller 8 and the inner wall of the second roller 13 to intermittently change. This intermittent change significantly increases the friction between the rollers, further grinding the edges and corners of the machine-made sand to a smoother level.

[0085] Example 3

[0086] The only difference between Example 3 and Examples 1 and 2 is that the frame 4 includes a base with multiple support columns for supporting the sump 18, feed assembly 6, etc. The support columns are also provided with height adjustment assemblies for adjusting the support height of the feed assembly 6 and sump 18, as well as the inclination of the sump 18. The inclination of the sump 18 is adjusted according to different machine-made sand separation requirements, thereby adjusting the inclination angle of the first roller assembly 1 and the second roller assembly 2, thereby improving the wet separation effect of different types of machine-made sand.

[0087] In the description of this specification, the reference terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wet separation device for impurities in machine-made sand raw materials, characterized by: It comprises a first roller assembly (1); a second roller assembly (2), wherein the first roller assembly (1) is arranged inside the second roller assembly (2), and the first roller assembly (1) and the second roller assembly (2) are arranged coaxially and tilted, and the second roller assembly (2) is mounted on the frame (4) via a rolling support assembly (3); A reverse drive assembly (5), wherein the first roller assembly (1) and the second roller assembly (2) are both connected to the reverse drive assembly (5), and the reverse drive assembly (5) drives the first roller assembly (1) and the second roller assembly (2) to rotate in opposite directions; A feed assembly (6), the feed assembly (6) being mounted on the frame (4), and a discharge end of the feed assembly (6) being located within the first roller assembly (1); A spray assembly (7), the spray assembly (7) being mounted on the frame (4), and a spray end of the spray assembly (7) being located inside the first roller assembly (1); The first roller assembly (1) comprises a first roller (8), the outer circumference of the first roller (8) is provided with a plurality of first discharge holes (9) arranged at intervals, and grinding balls are placed in the first roller (8); An end cover (10) is installed at the end of the first roller (8) and close to the side of the reverse drive assembly (5), and a drive shaft (11) is connected to the end cover (10), and the drive shaft (11) is connected to the reverse drive assembly (5); The second roller assembly (2) comprises a second roller (13), the outer circumference of the second roller (13) is provided with a plurality of second discharge holes (14) arranged at intervals, and the diameter of the second discharge holes (14) is smaller than the diameter of the first discharge hole (9); The reverse drive assembly (5) includes a drive gear (21), the drive gear (21) is mounted on the middle of the drive shaft (11), the drive gear (21) is meshedly connected to a plurality of planetary gears (22), and the planetary gears (22) are further meshedly connected to an inner ring gear (23); A pulley (24) is installed at the end of the drive shaft (11), and the pulley (24) is connected to the output end of the reducer (25) through a belt (27). The reducer (25) is also connected to a power motor (26), and the power motor (26) is installed on the frame (4); The spray assembly (7) comprises a spray pipe (31), the spray pipe (31) is located in the first drum assembly (1), the spray pipe (31) has a spray hole, and the spray pipe (31) is connected to a water supply device; A first hinge (33) is provided on the inner gear ring (23), and the two first hinges (33) are symmetrically arranged. The first hinge (33) is hinged to a second hinge (34), and the other end of the second hinge (34) is connected to the second roller (13); The first discharge hole (9) and the second discharge hole (14) are arranged alternately, and high-pressure spray water is sprayed from the spray hole, passes through the first discharge hole (9) and hits the inner wall of the second roller (13), causing the second roller (13) to rotate around the first hinge (33).

2. The wet separation device for impurities in machine-made sand raw materials according to claim 1 is characterized in that: The outer periphery of the first roller (8) is also provided with stirring protrusions (12).

3. The wet separation device for impurities in machine-made sand raw materials according to claim 1 is characterized in that: The rolling support assembly (3) includes a rolling support wheel (16), a plurality of the rolling support wheels (16) are connected to the second roller assembly (2), and the rolling support wheels (16) are mounted on the frame (4) via a mounting bracket (17).

4. The wet separation device for impurities in machine-made sand raw materials according to claim 1 is characterized in that: A water collecting trough (18) is further installed between the second roller assembly (2) and the frame (4), the rolling support assembly (3) is installed on the water collecting trough (18), and a conveying trough (19) is provided at the output end of the water collecting trough (18); A water baffle (20) is also provided between the output end of the second drum assembly (2) and the water collecting trough (18).

5. The wet separation device for impurities in machine-made sand raw materials according to claim 1 is characterized in that: The sides of the plurality of planetary gears (22) are respectively connected to a fixed plate (28) via a connecting shaft, and a middle hole (29) for the driving shaft (11) to pass through is provided in the middle of the fixed plate (28).

6. The wet separation device for impurities in machine-made sand raw materials according to claim 1, characterized in that: The feeding assembly (6) comprises a feeding funnel (30), the feeding funnel (30) being mounted on the frame (4), the output end of the feeding funnel (30) being provided with a conveying trough (32), the output end of the conveying trough (32) being located in the first roller assembly (1).

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