CN117380323A - A sand and gravel screening device - Google Patents

Abstract

The invention discloses a sand and gravel screening device, which relates to the field of construction technology and includes a screening box. A feeding hopper is provided on the top of the screening box. A first screen is installed inside the screening box. The inside of the screening box A plurality of second screens are installed at the bottom of the first screen, and vibration motors are installed at the bottoms of the first screen and the plurality of second screens. The beneficial effects of the present invention are: the sand and gravel screening device can push away the sand and gravel falling on the screen through the rotation of the rotating shaft in the screening box and the multiple push plates on one side of the rotating shaft, and turn it over to make the sand and gravel Push the sand and gravel evenly on the screen to avoid accumulation of sand and gravel on the screen, which will affect the screening effect of the sand and gravel, and some smaller sand and gravel will be screened out together with the larger sand and gravel, and there will be multiple flaps on the push plate. One side is an inclined plane. Under the action of the spring, it will automatically displace when it encounters greater resistance from sand and gravel, preventing the push plate from getting stuck when it moves.

Description

A sand and gravel screening device

Technical field

The invention relates to the field of construction technology, specifically a sand and gravel screening device.

Background technique

In the process of crushing and processing stone in the sand and gravel production line, the finished stone produced includes both smaller-sized sand and larger-sized stone. In order to avoid repeated crushing of the stone causing excessive stone powder content in the finished stone and affecting the quality of the finished product, Therefore, the sand and gravel need to be screened through devices such as vibrating screens before and after crushing.

During the sand and gravel screening process of the existing machine screening device, larger particles of sand and gravel are easy to accumulate on the screen, resulting in low sand and gravel screening efficiency. The small-grained sand and gravel falling from the bottom will roll into the large-grained sand and gravel collection device along with the large-grained sand and gravel, which is not conducive to the classification and screening of sand and gravel.

Contents of the invention

In view of the shortcomings of the existing technology, the present invention provides a sand and gravel screening device, which solves the problems raised in the above background technology.

In order to achieve the above objectives, the present invention is realized through the following technical solutions: a sand and gravel screening device, including a screening box, a feeding hopper is provided on the top of the screening box, and a third screening box is installed inside the screening box. A screen, with a plurality of second screens installed inside the screening box and at the bottom of the first screen, and vibration motors are installed at the bottoms of the first screen and the plurality of second screens, so A rotating shaft is rotatably connected to the interior of the screening box, and the rotating shaft penetrates the first screen mesh and a plurality of second screen meshes. One side of the rotating shaft and is located at the top of the first screen mesh and the plurality of second screen meshes rotate. A push plate is connected to the push plate, and a plurality of flip plates are slidingly connected to the inside of the push plate. A discharge opening is provided inside the first screen, and the sides of the plurality of second screens away from the discharge opening are all connected. A discharge port is provided, and a discharge hopper is fixedly connected to the interior of the screening box and at the bottom of the plurality of discharge ports, and a discharge pipe is fixedly connected to one side of the discharge hopper.

Preferably, a frame is installed on one side of the screening box, and a conveyor belt is installed inside the frame and at the bottom of the plurality of discharge pipes.

Preferably, a limiting groove is provided inside the rotating shaft. A plurality of sprockets are rotatably connected to the interior of the limiting groove. Chains are engaged with the outsides of the plurality of sprockets. The plurality of sprockets are respectively connected to a plurality of sprockets. The push plate is fixedly connected.

Preferably, two driving crushing rollers are rotatably connected inside the screening box and located at the bottom of the discharge opening, and guide plates are installed on corresponding sides of the bottom of the discharge opening.

Preferably, a plurality of chutes that match the flip plate are provided inside the push plate. A telescopic spring is installed inside the chute. One side of the telescopic spring is fixedly connected to one end of the flip plate. One end of the flap is a bevel.

Preferably, a first motor and a second motor are respectively installed on the top of the screening box and one side of the rotating shaft, and the output ends of the first motor and the second motor are respectively fixedly connected to the rotating shaft and one of the sprockets.

Preferably, the sieving hole sizes of the first screen mesh and the plurality of second screen meshes become smaller in sequence.

Preferably, a discharge port is provided at the bottom outside the screening box, a central rotating column is rotatably connected to the inside of the screening box, and a third motor is fixedly installed at the bottom of the screening box. The third motor The output end of the screen is fixedly installed with a first bevel gear. The bottom of the central rotating column penetrates the bottom of the screening box and is fixedly installed with a second bevel gear. The second bevel gear meshes with the first bevel gear, and a third bevel gear can be used. The motor provides power for the rotation of the central rotating column and the arc-shaped scraper.

Preferably, a first mounting slot is provided inside the central rotating column, and an arc-shaped scraper is inserted into the inside of the first mounting slot. The corresponding two sides of the arc-shaped scraper are close to the side of the central rotating column. A blocking plate is fixedly installed, and the arc-shaped scraper has an arc-shaped structure, which facilitates the use of the arc-shaped scraper to discharge materials located at the bottom of the screening box outwards.

Preferably, a second installation groove is provided inside the central rotating column, and third installation grooves are provided inside the central rotating column and on both sides corresponding to the second installation groove, and the interior of the second installation groove slides. A connecting column is connected, and one end of the connecting column penetrates the central rotating column and is fixedly installed with a push switch. A first inclined panel is fixedly installed on the side of the connecting column away from the push switch, and the first inclined panel is fixedly installed on the side away from the connecting column. A first spring is fixedly installed on one side, and inner limiting rods are rotatably connected to the interiors of the two third installation grooves. A number of inner limiting holes are provided on both sides of the arc-shaped scraper. The inner limiting rods are close to each other and are fixedly installed with inner limiting blocks on the side close to the inner limiting holes. The inner limiting blocks are inserted into the inside of the inner limiting holes. The two inner limiting rods are close to each other and away from the inner limiting holes. A second inclined plate is fixedly installed at one end of the limiting block, and the second inclined plate cooperates with the first inclined plate. The two inner limiting rods are far away from each other and are fixedly installed at one end close to the second inclined plate. spring.

The invention provides a sand and gravel screening device, which has the following beneficial effects:

1. This sand and gravel screening device can push the sand and gravel falling on the screen away through the rotation of the rotating shaft in the screening box and the multiple push plates on one side of the rotating shaft, and flip it over to make the sand and gravel evenly spread on the screen. Push away to prevent sand and gravel from accumulating on the screen, which will affect the sieving effect of sand and gravel, and some smaller sand and gravel will be screened out together with larger sand and gravel, and one side of the multiple flaps on the push plate is sloped , under the action of the spring, it automatically displaces when it encounters greater resistance from sand and gravel, preventing the push plate from getting stuck when it moves.

2. This sand and gravel screening device can crush the sand and gravel through the crushing roller set below the discharge port of the top screen. When the sand and gravel are crushed, the sand and gravel that are too large due to insufficient crushing will fall down with the push of the push plate. On the crushing roller, secondary crushing and screening are performed to improve the efficiency of sand and gravel screening. A discharge hopper is installed under the remaining screens. Under the action of multiple sets of conveyor belts, the graded and screened sand and gravel are separated into Transported to different storage devices to facilitate subsequent processing of sand and gravel.

Description of the drawings

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is an enlarged view of position A in Figure 1 of the present invention;

Figure 3 is a partial structural diagram of the present invention;

Figure 4 is a top cross-sectional view of the present invention;

Figure 5 is a top cross-sectional view of the present invention;

Figure 6 is a schematic structural diagram of the arc scraper of the present invention;

Figure 7 is an enlarged view of C in Figure 5 of the present invention;

Figure 8 is an enlarged view of B in Figure 1 of the present invention.

In the picture: 1. Screening box; 2. Feed hopper; 3. First screen; 4. Second screen; 5. Vibration motor; 6. Rotating shaft; 7. Push plate; 8. Turning plate; 9. Discharge port; 10. Unloading port; 11. Discharge hopper; 12. Discharge pipe; 13. Frame; 14. Conveyor belt; 15. Sprocket; 16. Chain; 17. Driven crushing roller; 18. Guide plate; 19. Chute; 20. Telescopic spring; 21. First motor; 22. Second motor; 23. Limiting slot; 24. Discharge port; 25. Center rotating column; 26. Arc scraper; 27. No. Three motors; 28. First bevel gear; 29. Second bevel gear; 30. Stop plate; 31. First mounting slot; 32. Second mounting slot; 33. Third mounting slot; 34. First spring; 35. First inclined plate; 36. Connecting column; 37. Press switch; 38. Inner limiting rod; 39. Inner limiting hole; 40. Inner limiting block; 41. Second inclined plate; 42. Second spring.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments.

Please refer to Figures 1 to 8. The present invention provides a technical solution: a sand and gravel screening device, including a screening box 1. A feed hopper 2 is provided on the top of the screening box 1. The inside of the screening box 1 is installed There is a first screen 3. A plurality of second screens 4 are installed inside the screening box 1 and at the bottom of the first screen 3. The sizes of the screening holes of the first screen 3 and the plurality of second screens 4 are It becomes smaller in sequence, which is convenient for dividing sand and gravel of different volumes into different batches and is suitable for different purposes. The first screen 3 and the plurality of second screens 4 are equipped with vibration motors 5 at the bottom to drive the first screen. The mesh 3 and the plurality of second screen meshes 4 continuously vibrate to avoid clogging of the screen holes. The interior of the screening box 1 is rotatably connected with a rotating shaft 6, which penetrates the first screen mesh 3 and the plurality of second screen meshes 4. The rotating shaft 6 A push plate 7 is rotatably connected to one side of the first screen 3 and the tops of the plurality of second screens 4. A limiting groove 23 is provided inside the rotating shaft 6, and a plurality of chains are rotatably connected to the interior of the limiting groove 23. The chain 16 is engaged with the outer side of the plurality of sprockets 15 , and the plurality of sprockets 15 are fixedly connected to the plurality of push plates 7 respectively.

Among them, under the action of the chain 16, the plurality of sprockets 15 and the plurality of push plates 7 are driven to rotate simultaneously, prompting the plurality of turning plates 8 outside the push plate 7 to turn over the sand and gravel, and cooperate with the rotation of the rotating shaft 6 to turn the third The sand and gravel on the first screen mesh 3 and the plurality of second screen meshes 4 are pushed away to prevent the sand and gravel from accumulating on the screen and affecting the screening effect of the sand and gravel.

Among them, a plurality of flip plates 8 are slidingly connected to the inside of the push plate 7. A plurality of chute 19 matching the flip plate 8 is provided inside the push plate 7. A telescopic spring 20 is installed inside the chute 19. The telescopic spring 20 One side of the flap 8 is fixedly connected to one end of the flap 8. One end of the multiple flaps 8 is an inclined plane, so that when the inclined plane of the flap 8 is subject to greater resistance from the sand and gravel, it will automatically displace under the action of the telescopic spring 20 at one end to avoid The push plate 7 gets stuck when moving. A first motor 21 and a second motor 22 are respectively installed on the top of the screening box 1 and on one side of the rotating shaft 6. The output ends of the first motor 21 and the second motor 22 are respectively connected with the rotating shaft 6 and the rotating shaft 6. One of the sprockets 15 is fixedly connected to provide power for the rotation of the rotating shaft 6 and the sprocket 15 respectively. A discharge opening 9 is provided inside the first screen 3, and a plurality of second screens 4 are located inside a part far away from the discharge opening 9. There are discharge openings 10 on both sides. A discharge hopper 11 is fixedly connected to the inside of the screening box 1 and at the bottom of the plurality of discharge openings 10. A discharge pipe 12 is fixedly connected to one side of the discharge hopper 11. The screening box A rack 13 is installed on one side of 1, and a conveyor belt 14 is installed inside the rack 13 and at the bottom of a plurality of discharge pipes 12 to facilitate transporting the graded and screened sand and gravel to different storage devices for screening. There are two driving crushing rollers 17 rotatably connected inside the box 1 and located at the bottom of the discharge port 9, which perform secondary crushing of larger sand and gravel caused by insufficient crushing, thereby improving the screening efficiency of the first screen 3. To improve efficiency, guide plates 18 are installed on both sides of the bottom of the discharge port 9 to guide the falling sand and gravel so that it falls between the two driving crushing rollers 17 .

Among them, a discharge port 24 is provided at the bottom outside the screening box 1. A central rotating column 25 is connected to the inside of the screening box 1 for rotation. A third motor 27 is fixedly installed at the bottom of the screening box 1. The output of the third motor 27 The first bevel gear 28 is fixedly installed at the end, and the bottom of the central rotating column 25 penetrates the bottom of the screening box 1 and is fixedly installed with a second bevel gear 29. The second bevel gear 29 meshes with the first bevel gear 28, and a third bevel gear 29 can be used. The motor 27 provides power for the rotation of the central rotating column 25 and the arc-shaped scraper 26. A first mounting slot 31 is provided inside the central rotating column 25, and an arc-shaped scraper 26 is inserted into the first mounting slot 31. A blocking plate 30 is fixedly installed on the corresponding two sides of the scraper 26 close to the central rotating column 25. The arc-shaped scraper 26 has an arc-shaped structure, which facilitates the use of the arc-shaped scraper 26 to move the materials located at the bottom of the screening box 1 to The central rotating column 25 has a second mounting slot 32 inside, and third mounting slots 33 are opened inside the central rotating column 25 and on both sides corresponding to the second mounting slot 32. The inside of the second mounting slot 32 slides. A connecting column 36 is connected. One end of the connecting column 36 penetrates the central rotating column 25 and is fixedly installed with a push switch 37. A first inclined plate 35 is fixedly installed on the side of the connecting column 36 away from the push switch 37. The first inclined plate 35 is far away from the connection. A first spring 34 is fixedly installed on one side of the column 36, and inner limiting rods 38 are rotatably connected to the interiors of the two third installation slots 33. A number of inner limiting holes 39 are provided on both sides of the arc-shaped scraper 26. The two inner limiting rods 38 are close to each other and are fixedly installed with an inner limiting block 40 on the side close to the inner limiting hole 39. The inner limiting block 40 is inserted into the inside of the inner limiting hole 39, and the two inner limiting rods 38 are close to each other. A second inclined plate 41 is fixedly installed at one end away from the inner limiting block 40. The second inclined plate 41 cooperates with the first inclined plate 35. The two inner limiting rods 38 are far away from each other and located close to the second inclined plate 41. One end is fixedly installed with a second spring 42

To sum up, when using this sand and gravel screening device, the sand and gravel are put into the screening box 1 through the feeding hopper 2, and then fall on the first screen 3. At this time, the rotating shaft in the screening box 1 6 rotates, driving multiple push plates 7 to move, pushing away the accumulated sand and gravel, and at the same time, under the action of the chain 16 meshing on the outside of the multiple sprockets 15 in the rotating shaft 6, multiple push plates 7 are prompted to rotate simultaneously, thereby The plurality of turning plates 8 on the push plate 7 are driven to turn over the sand and gravel. At this time, the excessively large sand and gravel, pushed by the push plate 7, fall through the discharge port 9 and fall between the two driving crushing rollers 17 below. During the period, it is crushed, and the smaller sand and gravel screened out by the first screen 3 fall on a plurality of second screens 4, and are screened sequentially to different discharge hoppers 11 according to the size. inside, and guided to the conveyor belt 14 under the action of the discharge pipe 12, and transported to different collecting devices. When the finest sand and gravel fall into the bottom of the screening box 1, the third motor 27 is started, and the third motor 27 is used to 27 drives the first bevel gear 28 to rotate, and then the second bevel gear 29 drives the central rotating column 25 and the arc scraper 26 to rotate, and the arc structure of the arc scraper 26 is used to move the material at the bottom of the screening box 1 The material is discharged to the outside through the discharge port 24, and can be pressed by the push switch 37, so that the push switch 37 drives the connecting column 36 and the first inclined plate 35 to move inward, and passes through the first inclined plate 35 and the second inclined plate 41. Cooperating, the second inclined plate 41 is closer to the inside of the second installation groove 32 under the pressure of the second spring 42. At the same time, since the center point of rotation of the inner limiting rod 38 is at the middle position, the inner limiting block 40 will be moved toward The side close to the third mounting groove 33 moves, and then comes out from the inside of the inner limiting hole 39, and then the arc-shaped scraper 26 can be taken out.

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can, within the technical scope disclosed in the present invention, use the technical solutions of the present invention and its Equivalent substitutions or changes of the inventive concept shall be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a grit screening plant, includes screening case (1), its characterized in that: the top of screening case (1) is provided with feeder hopper (2), the internally mounted of screening case (1) has first screen cloth (3), the inside of screening case (1) just is located the bottom of first screen cloth (3) and installs a plurality of second screen cloth (4), vibrating motor (5) are all installed to the bottom of first screen cloth (3) and a plurality of second screen cloth (4), the inside rotation of screening case (1) is connected with pivot (6), pivot (6) run through first screen cloth (3) and a plurality of second screen cloth (4), one side of pivot (6) just is located the top of first screen cloth (3) and a plurality of second screen cloth (4) and all rotates and be connected with push pedal (7), the inside sliding connection of push pedal (7) has a plurality of flaps (8), discharge opening (9) have been seted up to the inside of first screen cloth (3) and a plurality of second screen cloth (4) is inside to keep away from one side of discharge opening (9), the inside of screening case (1) just is located a plurality of discharge opening (10) and is located the equal fixed connection of hopper (11).

2. A sand screening device according to claim 1, wherein: a frame (13) is arranged on one side of the screening box (1), and conveying belts (14) are arranged in the frame (13) and positioned at the bottoms of the discharge pipes (12).

3. A sand screening device according to claim 1, wherein: limiting grooves (23) are formed in the rotating shaft (6), a plurality of chain wheels (15) are connected to the limiting grooves (23) in a rotating mode, chains (16) are meshed with the outer sides of the chain wheels (15), and the chain wheels (15) are fixedly connected with the pushing plates (7) respectively.

4. A sand screening device according to claim 1, wherein: the inside of screening case (1) and be located the bottom rotation of bin outlet (9) and be connected with two drive crushing rollers (17), deflector (18) are all installed to the corresponding both sides in bin outlet (9) bottom.

5. A sand screening device according to claim 1, wherein: the inside of push pedal (7) is offered a plurality of and is turned over board (8) matched with spout (19), the internally mounted of spout (19) has extension spring (20), one side of extension spring (20) and the one end fixed connection who turns over board (8), a plurality of the one end that turns over board (8) is the inclined plane.

6. A sand screening device according to claim 3, wherein: the top of screening case (1) and one side of pivot (6) are installed first motor (21) and second motor (22) respectively, the output of first motor (21) and second motor (22) respectively with pivot (6) and one of them sprocket (15) fixed connection.

7. A sand screening device according to claim 1, wherein: the sizes of screening holes of the first screen (3) and the second screens (4) become smaller in sequence.

8. A sand screening device according to claim 1, wherein: the bottom in screening case (1) outside has seted up discharge gate (24), the inside rotation of screening case (1) is connected with center pivoted post (25), the bottom fixed mounting of screening case (1) has third motor (27), the output fixed mounting of third motor (27) has first bevel gear (28), the bottom of center pivoted post (25) runs through the bottom of screening case (1) and fixed mounting has second bevel gear (29), second bevel gear (29) and first bevel gear (28) meshing.

9. A sand screening apparatus according to claim 8, wherein: the novel anti-collision device is characterized in that a first mounting groove (31) is formed in the center rotating column (25), an arc-shaped scraping plate (26) is inserted into the first mounting groove (31), one side, close to the center rotating column (25), of the corresponding two sides of the arc-shaped scraping plate (26) is fixedly provided with a blocking plate (30), and the arc-shaped scraping plate (26) is of an arc-shaped structure.

10. A sand screening device according to claim 9, wherein: the inner part of the central rotating column (25) is provided with a second mounting groove (32), the inner part of the central rotating column (25) is provided with third mounting grooves (33) at two sides corresponding to the second mounting groove (32), the inner part of the second mounting groove (32) is connected with a connecting column (36) in a sliding manner, one end of the connecting column (36) penetrates through the central rotating column (25) and is fixedly provided with a pressing switch (37), one side of the connecting column (36) far away from the pressing switch (37) is fixedly provided with a first inclined panel (35), one side of the first inclined panel (35) far away from the connecting column (36) is fixedly provided with a first spring (34), the inner parts of the two third mounting grooves (33) are respectively connected with an inner limiting rod (38) in a rotating manner, two corresponding sides of the arc-shaped scraping plates (26) are respectively provided with a plurality of inner limiting holes (39), one side, close to the inner limiting rods (38) is fixedly provided with an inner limiting block (40), the inner limiting block (40) is inserted into one side, close to the inner limiting block (39), one side, close to the inner limiting block (39) is far from the inner limiting block (41), one side, and the inner limiting block (40) is fixedly provided with the inner limiting block (41), a second spring (42) is fixedly arranged at one end of the two inner limiting rods (38) which are far away from each other and are positioned close to the second inclined panel (41).