Gravel screening device
By designing a combined structure and water spraying mechanism for the sand and gravel screening device, the problem of dust separation in river sand was solved, screening efficiency was improved, and water resources were saved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2026-03-31
AI Technical Summary
Existing sand and gravel screening devices cannot effectively separate dust from river sand, resulting in dust mixing with river sand during screening in a dry state, which affects screening efficiency and resource utilization.
Design a sand and gravel screening device, including a feed inlet, a coarse screen assembly, a guide assembly, a fine screen assembly, and a water collection assembly. Through a combination of a motor-driven push plate and a vibrating screen plate, after preliminary screening, a water spraying mechanism is used to spray water in the fine screen assembly to separate the soil from the fine sand and gravel. The soil is turned into muddy water and collected, thus realizing the separation of sand and gravel from soil.
It achieves efficient separation of river sand and dust, improves screening efficiency, and reduces dust generation by reusing water resources through water collection components.
Smart Images
Figure CN224058044U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of river sand screening, specifically to a sand and gravel screening device. Background Technology
[0002] Sand is an essential component of concrete production and has a significant impact on concrete performance. The main types of sand used in engineering construction are river sand and manufactured sand. River sand, as a resource, is primarily distributed within river basins. However, due to the uncontrollable natural environment, collected river sand often contains large stones and mud. Since concrete requires river sand to remove these impurities, it needs to be screened. Currently, river sand is typically screened in a dry state because dry river sand is screened faster than wet river sand. However, this method has some problems. After drying, the mixed soil decomposes into dust that mixes with the river sand. Furthermore, this dust is smaller than the river sand particles. Existing sand and gravel screening devices can only screen larger stones and gravel, but cannot separate the dust mixed with the river sand. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a sand and gravel screening device that solves the problem that existing sand and gravel screening devices can only screen larger sand and gravel blocks, but cannot separate dust mixed with river sand.
[0004] According to an embodiment of this utility model, a sand and gravel screening device includes a rectangular box. From top to bottom, the box contains an inlet, a coarse screening assembly, a guiding assembly, a fine screening assembly, and a water collection assembly. The coarse screening assembly includes an annular surrounding plate fixedly disposed below the bottom of the inlet and a vibrating screen plate elastically connected to the bottom of the annular surrounding plate. A push plate is radially rotatably disposed above the top of the vibrating screen plate, the bottom of which does not contact the upper surface of the vibrating screen plate. A first motor is fixedly disposed in the central area of the annular surrounding plate, and the output end of the first motor coaxially drives the push plate. The fine screening assembly includes an inclined... A screen cylinder is obliquely rotated below the material guiding assembly. The higher end of the screen cylinder is open and its bottom can be connected to the outside of the box. The lower end is equipped with a second motor to drive the screen cylinder to rotate. A feeding plate is also suspended inside the screen cylinder. One end of the feeding plate is fixedly connected to the inner wall of the box, and the other end extends to the lower end of the screen cylinder. The bottom of the material guiding assembly extends to the area above the feeding plate near the end of the box. A water spraying mechanism is also provided at the bottom of the feeding plate. The water collection assembly includes a water collection tank located at the bottom of the box. The top of the water collection tank is open, and the open area is larger than the bottom screening area of the screen cylinder.
[0005] Furthermore, an annular baffle plate is provided on the inner side of the annular enclosure. The outer wall of the annular baffle plate is slidably connected to the annular enclosure. A vibrating screen plate is fixedly installed at the bottom. A first discharge port is also provided in the area of the annular baffle plate that passes through the bottom vibrating screen plate. The first discharge port extends to the outside through the annular enclosure and the box body.
[0006] Furthermore, a vibration motor fixed to the housing is also provided in the adjacent area on one side of the bottom of the vibrating screen plate, and the output end of the vibration motor is in contact with the bottom of the vibrating screen plate.
[0007] Furthermore, a second discharge port is provided on the inner wall of the box at the bottom position corresponding to the higher end of the screen cylinder. One end of the second discharge port extends to the bottom area of the higher end of the screen cylinder, and the other end extends to the outside of the box.
[0008] Furthermore, the material guiding assembly includes a material collecting cylinder fixedly disposed in the area below the vibrating screen plate and open at the top. The bottom of the material collecting cylinder is inclined and a material guiding port is opened at the lowest end. The material guiding port is located in the area above the higher end of the feeding plate.
[0009] Furthermore, the inner wall of the screen cylinder is also provided with a spiral ring plate around the axis.
[0010] Furthermore, the water spraying mechanism includes a water pipe fixedly installed on the lower surface of the bottom of the feeding plate, and a number of nozzles are evenly distributed on the pipe wall, with the nozzles facing the inner wall of the screen cylinder near the bottom area.
[0011] Furthermore, the water collection assembly also includes a water pump located on one side outside the water collection tank and a water outlet pipe connected to the water pump, the water outlet pipe extending through the tank body to the outside of the tank body.
[0012] The technical principle of this utility model is as follows: The problem of separating dust mixed with river sand is solved by arranging an inlet, a coarse screen assembly, a guide assembly, a fine screen assembly, and a water collection assembly from top to bottom within the casing. A first motor drives a pusher plate to push the sand and gravel within the screening device composed of an annular enclosure and a vibrating screen plate. While being pushed, finer sand and gravel fall from the vibrating screen plate into the guide assembly, while coarser sand and gravel remain, thus completing the initial screening. Then, the finer sand and gravel enter the guide assembly and are guided to the screen cylinder of the fine screen assembly. Simultaneously, a water spraying mechanism in the screen cylinder sprays water, wetting the even finer and more fragile soil mixed with the finer sand and gravel. This soil becomes muddy water and flows out of the screen cylinder through the screen holes, thus separating the finer sand and gravel from the soil. Finally, this muddy water is collected in the water collection assembly located below the screen cylinder, filtered, and reused, saving water resources. Attached Figure Description
[0013] Figure 1This is a structural schematic diagram of an embodiment of the present utility model.
[0014] Figure 2 This is a schematic diagram of the structure of this utility model.
[0015] Figure 3 This is a schematic diagram of the appearance of this utility model.
[0016] Figure 4 This is a top view of the structure of the coarse screening assembly of this utility model.
[0017] Figure 5 for Figure 1 Schematic diagram at point A
[0018] In the above attached figures:
[0019] 1. Box body; 11. Inlet; 111. Support rod; 12. First outlet; 13. Second outlet;
[0020] 2. Coarse screening assembly; 21. Annular surrounding plate; 22. Vibrating screen plate; 23. Annular baffle plate; 24. First motor; 25. Push plate; 26. Vibrating motor;
[0021] 3. Material guiding assembly; 31. Material collecting cylinder; 32. Material guide port;
[0022] 4. Fine screening assembly; 41. Screen cylinder; 411. Spiral ring plate; 42. Second motor; 43. Feeding plate;
[0023] 5. Water spray mechanism; 51. Water pipe; 511. Sprinkler head;
[0024] 6. Water collection assembly; 61. Water collection tank; 62. Water outlet pipe; 63. Water pump. Detailed Implementation
[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.
[0026] like Figures 1 to 5As shown in the figure, this utility model embodiment proposes a sand and gravel screening device, including a rectangular box 1. Inside the box 1, from top to bottom, are arranged an inlet 11, a coarse screening assembly 2, a guiding assembly 3, a fine screening assembly 4, and a water collection assembly 6. The coarse screening assembly 2 includes an annular surrounding plate 21 fixedly disposed below the bottom of the inlet 11 and a vibrating screen plate 22 elastically connected to the bottom of the annular surrounding plate 21. A push plate 25 is also radially rotatably disposed above the top of the vibrating screen plate 22. The bottom of the push plate 25 does not contact the upper surface of the vibrating screen plate 22 to avoid impact between the vibrating screen plate 22 and the bottom of the push plate 25 when the vibrating screen plate 22 vibrates. A first motor 24 is fixedly disposed in the central area of the annular surrounding plate 21 via a horizontally arranged support rod 111. One end of the support rod 111 is fixedly connected to the outside of the first motor 24, and the other end is fixedly connected to the bottom inner wall of the inlet 11. Above, the output end of the first motor 24 is coaxially driven and connected to the push plate 25; the fine screening assembly 4 includes a screen cylinder 41 that is tilted and rotated below the bottom of the material guiding assembly 3 via a bearing. The higher end of the screen cylinder 41 is open and the bottom can be connected to the outside of the box 1. The lower end is also provided with a second motor 42 for driving the screen cylinder 41 to rotate. A feeding plate 43 is also suspended and fitted inside the screen cylinder 41. One end of the feeding plate 43 is fixedly connected to the inner wall of the box 1 and the other end extends to the lower end of the screen cylinder 41. The bottom of the material guiding assembly 3 extends to the upper area of the feeding plate 43 near the box. A water spraying mechanism 5 is also provided at the bottom of the feeding plate 43. The water collection assembly 6 includes a water collection tank 61 set at the bottom of the box 1. The top of the water collection tank 61 is open and the open area is larger than the bottom screening area of the screen cylinder 41.
[0027] like Figure 1 and Figure 2 As shown, the problem of the inability to separate dust mixed with river sand is solved by setting up an inlet 11, a coarse screen assembly 2, a guide assembly 3, a fine screen assembly 4, and a water collection assembly 6 from top to bottom inside the housing 1. The sand and gravel are pushed by a pusher plate driven by a first motor 24 within the screening device composed of an annular enclosure 21 and a vibrating screen plate 22. While being pushed, finer sand and gravel vibrate from the vibrating screen plate 22, passing through the screen openings and falling into the guide assembly 3, while coarser sand and gravel remain. This completes the initial screening. Then, the finer sand and gravel... After the gravel enters the feeding assembly 3, it is guided by the feeding assembly 3 to the screen cylinder 41 of the fine screen assembly 4. At the same time, the water spraying mechanism 5 set in the screen cylinder 41 starts spraying water to wet the finer and more fragile soil mixed with the finer gravel. As the screen cylinder 41 rotates, this soil turns into muddy water and flows out of the screen cylinder 41 through the screen holes. At this point, the finer gravel is separated from the soil. Finally, this muddy water enters the water collection assembly 6 located below the screen cylinder 41 and is collected. After filtration, it can be reused to save water resources.
[0028] Furthermore, such as Figure 1 and Figure 4 as well as Figure 5 As shown, an annular baffle plate 23 is also provided on the inner side of the annular baffle plate 21. The outer wall of the annular baffle plate 23 is slidably connected to the annular baffle plate 21, and the bottom is fixedly installed on the vibrating screen plate 22. The annular baffle plate 23 is also provided with a first discharge port 12 in the area near the bottom vibrating screen plate 22. The first discharge port 12 extends to the outside through the annular baffle plate 21 and the box 1. Since the vibrating screen plate 22 and the annular baffle plate 21 are elastically connected, a spring and a telescopic rod set in the spring are generally used to connect the bottom of the annular baffle plate 21 and the top edge of the vibrating screen plate 22. Therefore, there will be a gap between the vibrating screen plate 22 and the annular baffle plate 21. The annular baffle plate 23 set on the inner side of the annular baffle plate 21 can make the annular baffle plate 21 and the annular baffle plate 23 form a sleeve state. The annular baffle plate 23 blocks the gap and prevents the sand and gravel from leaking out of the gap. And through the first discharge port 12, the push plate sends the larger sand and gravel particles out of the coarse screening assembly 2.
[0029] Furthermore, such as Figure 1 As shown, a vibration motor 26 fixed on the housing 1 is also provided in the adjacent area on one side of the bottom of the vibrating screen plate 22. The output end of the vibration motor is in contact with the bottom of the vibrating screen plate 22, and the vibration motor provides power for the vibration of the vibrating screen plate 22.
[0030] Furthermore, such as Figure 1 and Figure 2 as well as Figure 3 As shown, a second discharge port 13 is also provided on the inner wall of the box body 1 at the bottom position corresponding to the higher end of the screen cylinder 41. One end of the second discharge port 13 extends to the bottom area of the higher end of the screen cylinder 41, and the other end extends to the outside of the box body 1, as shown. Figure 1 and Figure 2 As shown, the inner wall of the screen cylinder 41 is also provided with a spiral ring plate 411 around the axis. Due to the numerous meshes distributed on the inner wall of the screen cylinder 41, the friction is high. Since the spiral ring plate 411 extends from the lower end to the higher end of the screen cylinder 41 around the axis, the structure of the screen cylinder 41 and the spiral ring plate 411 is similar to the internal structure of a horizontal concrete mixer. After the concrete is mixed, the entire horizontal concrete mixer rotates in the opposite direction, and the concrete flows out from the outlet of the horizontal mixer. While the screen cylinder 41 is rotating, the finer sand and gravel also rotate. Under the action of gravity, they continuously roll and move along the spiral screen plate 411 towards the higher side of the screen cylinder 41. Due to the obstruction of the spiral ring plate 411, they do not slip back to the bottom of the screen cylinder 41. The sand and gravel are thus continuously rolled and moved to the outlet of the screen cylinder 41. Then, by setting a second discharge port 13 at the bottom of the higher end of the screen cylinder 41 to extend to the outside, the sand and gravel fall into the second discharge port 13, which can realize the continuous collection of finer sand and gravel.
[0031] Furthermore, such as Figure 1and Figure 2 As shown, the material guiding assembly 3 includes a collecting cylinder 31 fixedly disposed below the vibrating screen plate 22 and open at the top. The bottom of the collecting cylinder 31 is inclined and has a guiding port 32 at its lowest end, which is located above the higher end of the feeding plate 43. The collecting cylinder 31 collects finer gravel that has passed through the coarse screen. Under the action of gravity, the inclined bottom causes the gravel to enter the feeding plate 43 from the guiding port 32, and then enter the screen cylinder 41 along the feeding plate 43.
[0032] Furthermore, such as Figure 1 and Figure 2 As shown, the water spraying mechanism 5 includes a water pipe 51 fixedly installed on the lower surface of the bottom of the feeding plate 43. The water supply of the water pipe 51 can come from a water supply device outside the box 1. Several nozzles 511 that can spray water at high pressure are evenly distributed on the pipe wall of the water pipe 51. The nozzles 511 face the inner wall of the screen cylinder 41 near the bottom area. When the screen cylinder 41 rotates, the sand and gravel also rotate synchronously, and the high-pressure water flow can wash the sand and gravel, removing the soil from the surface of the sand and gravel.
[0033] Furthermore, such as Figure 1 and Figure 2 As shown, the water collection assembly 6 also includes a water pump 63 located on one side of the outside of the water collection tank 61 and a water outlet pipe 62 connected to the water pump 63. The water outlet pipe 62 extends through the tank body 1 to the outside of the tank body 1. A screen can also be provided inside the water collection tank 61 near the water pump 63 to block some larger impurities in the muddy water, so that the water pump 63 will not be easily damaged.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A grit screening device characterised in that: The utility model provides a kind of rectangular box, the box is sequentially provided with inlet, coarse screen component, guide component, fine screen component, water collecting component from top to bottom, the coarse screen component includes annular apron fixedly arranged in the bottom of inlet below and the vibration sieve plate elastically connected with the bottom of annular apron, the top area of vibration sieve plate is also rotationally provided with push plate along radial direction, the bottom of push plate is not in contact with the upper surface of vibration sieve plate, the central region of annular apron is also fixedly provided with first motor, and the output end of first motor coaxially drives and connects push plate;The fine screen component includes sieve cylinder rotationally arranged in the bottom of guide component, and the higher one end of sieve cylinder is open and the bottom can be connected to the outside of box, and the lower one end is also provided with second motor for driving sieve cylinder to rotate, and feeding plate is also suspendedly matched in sieve cylinder, one end of feeding plate is fixedly connected on the inner wall of box, and the other end extends to the position of the lower one end of sieve cylinder, the bottom of guide component extends to the upper area of feeding plate close to the one end of box, and water spraying mechanism is also provided on the bottom of feeding plate, and the water collecting component includes water collecting tank arranged in the bottom of box, and the top of water collecting tank is open and the open area is larger than the bottom screening area of sieve cylinder.
2. A grit separation device as claimed in claim 1, characterised in that: The inner side of the annular apron is also provided with an annular barrier plate, the outer wall of the annular barrier plate is slidingly connected with the annular apron, and the bottom is fixedly arranged on the vibration sieve plate. The area of the annular barrier plate close to the vibration sieve plate is also provided with a first discharge port. The first discharge port extends to the outside through the annular apron and the box.
3. A grit separation device as claimed in claim 1, characterised in that: The bottom side of the vibration sieve plate is also provided with a vibration motor fixed on the box. The output end of the vibration motor is in contact with the bottom of the vibration sieve plate.
4. A grit separation device as claimed in claim 1, characterised in that: The bottom position of the inner wall of the box corresponding to the higher one end of the sieve cylinder is also provided with a second discharge port. One end of the second discharge port extends to the bottom area of the higher one end of the sieve cylinder, and the other end extends to the outside of the box.
5. A grit separation device as claimed in claim 1, characterised in that: The guide component includes a material collecting cylinder fixedly arranged below the vibration sieve plate and open at the top. The bottom of the material collecting cylinder is inclined and provided with a material guide port at the lowest end. The material guide port is located above the higher one end of the feeding plate.
6. A grit separation device as claimed in claim 1, characterised in that: The inner wall of the sieve cylinder is also provided with a spiral ring plate around the axis.
7. A grit separation apparatus as claimed in claim 1, characterised in that: The water spraying mechanism includes a water pipe fixedly arranged on the bottom surface of the feeding plate. The pipe wall of the water pipe is also uniformly provided with a plurality of spray heads. The spray heads are directed towards the inner wall of the sieve cylinder close to the bottom area.
8. A grit separation apparatus as claimed in claim 1, characterised in that: The water collecting component also includes a water pump arranged on one side outside the water collecting tank and a water outlet pipe connected with the water pump. The water outlet pipe extends to the outside of the box through the box.