Gravel screening device

Abstract

The utility model discloses a broken stone screening device, which relates to the technical field of broken stone screening and comprises a screening box, the top end of the screening box is communicated with a feed hopper, a screen component is arranged in an inner cavity of the screening box, one end of the screen component is rotatably connected with the inner wall of the screening box, and the other end of the screen component extends out of the screening box. The screening box is provided with an opening used for the stretching-out end of the screen assembly to swing up and down, and the end, located in the screening box, of the screen assembly is higher than the stretching-out end. A crank connecting rod assembly is installed on the outer wall of the screening box, the crank connecting rod assembly and the screen assembly are correspondingly arranged, and the crank connecting rod assembly is rotationally connected with the extending-out end of the screen assembly. According to the gravel screening device, the probability that the screening holes are blocked can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of crushed stone screening, in particular to a crushed stone screening device. Background Art

[0002] Gravel needs to be screened during the production process or at the construction site, that is, gravel of different particle sizes needs to be separated for classification, storage, use, reprocessing, sales, etc.

[0003] In the related art, a gravel screening device is used to screen the gravel. The screening device includes an inclined screen. The gravel rolls from the higher end of the screen to the lower end by its own weight. The gravel with a particle size smaller than the screen hole is discharged through the screen hole, and the gravel with a particle size larger than the screen hole is discharged from the lower end of the screen, thus completing the screening process.

[0004] The inventors found that due to the irregular and rough surface shape of the crushed stones, the crushed stones that slide down by gravity during screening are easily stuck on the sieve holes, causing the sieve holes to be blocked and affecting the screening rate of the device.

[0005] Therefore, it is necessary to develop a crushed stone screening device for the above-mentioned defects. Utility Model Content

[0006] The utility model aims to provide a gravel screening device which can reduce the probability of sieve holes being blocked.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] The utility model provides a gravel screening device, comprising a screening box, the top of the screening box being connected to a feed hopper, a screen assembly being provided in the inner cavity of the screening box, one end of the screen assembly being rotatably connected to the inner wall of the screening box, the other end of the screen assembly protruding out of the screening box, and an opening being provided on the screening box for the protruding end of the screen assembly to swing up and down, one end of the screen assembly located in the screening box being higher than the protruding end; a crank-connecting rod assembly being installed on the outer wall of the screening box, the crank-connecting rod assembly being arranged corresponding to the screen assembly, and the crank-connecting rod assembly being rotatably connected to the protruding end of the screen assembly.

[0009] Furthermore, the screen assemblies are provided with at least two and are spaced apart in an upper and lower manner, and the sieve holes of the higher screen assembly among the adjacent screen assemblies are larger than the sieve holes of the lower screen assembly; the higher end of the screen assembly at the top is arranged corresponding to the feed hopper; the protruding ends of the adjacent screen assemblies face opposite directions.

[0010] Furthermore, the crank-connecting rod assembly includes a rotating wheel, a connecting rod, a mounting plate and a driving motor, the mounting plate is fixedly connected to the screening box, the driving motor is fixedly connected to the mounting plate, the rotating wheel is coaxially fixedly connected to the output shaft of the driving motor, an eccentric shaft is fixed to the end of the rotating wheel away from the driving motor, one end of the connecting rod is rotatably connected to the eccentric shaft, and the other end of the connecting rod is rotatably connected to the protruding end of the corresponding screen assembly.

[0011] Furthermore, the screen assembly includes a dustpan and several vibrators, the vibrators are fixed to the bottom surface of the dustpan, the dustpan has a rear wall plate at one end as the higher end, the higher end of the dustpan is connected to the screening box through a pin support, and the connecting rod is connected to the bottom surface of the dustpan through a hinge support; the screen holes of the screen assembly are opened on the bottom wall of the dustpan, and the screen holes are located in the screening box.

[0012] Furthermore, both sides of the dustpan are in sliding contact with the inner wall of the screening box; a first guide plate is correspondingly provided above the higher end of each dustpan, the first guide plate is fixedly connected to the screening box, and the first guide plate is arranged parallel to the corresponding dustpan; a second guide plate is provided between adjacent dustpans, and the second guide plate is arranged opposite to the first guide plate between adjacent dustpans, the second guide plate is arranged parallel to the higher dustpan, the second guide plate is fixedly connected to the screening box, the second guide plate is greater than or equal to the length of the first guide plate, and there is a gap between the ends of the first guide plate and the second guide plate that are close to each other.

[0013] Furthermore, it also includes a water pipe, which is fixedly connected to the outer wall of the screening box. The water pipe is connected to a plurality of atomizing nozzles. The screening box is provided with through holes corresponding to the atomizing nozzles one by one, and the atomizing nozzles are located in the through holes.

[0014] Furthermore, it also includes a collecting box, which is placed in the screening box and below the dustpan at the bottom. A third guide plate is provided between the collecting box and the dustpan at the bottom. Two third guide plates are provided and are respectively arranged corresponding to the two ends of the dustpan at the bottom. The third guide plates are fixedly connected to the screening box. The two third guide plates are arranged in an inverted eight shape, and there is a gap at one end of the two third guide plates that are close to each other.

[0015] Furthermore, the feed hopper includes a bucket-shaped frame and a cylinder, and sealing plates are fixed at both ends of the cylinder. The cylinder is horizontally fixed on the top wall of the screening box and is connected to the inner cavity of the screening box. The bottom end of the bucket-shaped frame is fixedly connected to the circumferential outer wall of the cylinder and is connected to the inner cavity of the cylinder; an arc-shaped plate is coaxially rotated in the cylinder, and the outer wall diameter of the arc-shaped plate matches the inner wall diameter of the cylinder, and the arc-shaped plate is correspondingly arranged at the connection between the cylinder and the bucket-shaped frame; a drive shaft is coaxially rotated in the cylinder, and a number of fixed rods are fixedly connected between the drive shaft and the arc-shaped plate; and a drive assembly is also included that is coaxially fixedly connected to one end of the drive shaft.

[0016] Furthermore, the driving assembly includes a reduction motor, which is fixedly connected to the outer wall of any one of the blocking plates, and the output shaft of the reduction motor rotates through the blocking plate and is fixedly connected to the driving shaft.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are:

[0018] The utility model discloses a gravel screening device, wherein the crank-connecting rod assembly and the screen assembly form a crank rocker mechanism, and the crank-connecting rod assembly drives one end of the screen assembly to swing up and down, thereby causing the screen assembly to vibrate, thereby making it difficult for gravel to get stuck on the screen holes, thereby reducing the probability of the screen holes being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the main structure of Example 1 and Example 2 of the present utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure;

[0022] Figure 3 for Figure 1 Schematic diagram of the right view structure;

[0023] Figure 4 Schematic diagram of the three-dimensional structure of a dustpan;

[0024] Figure 5 This is a schematic diagram of the main structure of the water pipe;

[0025] Figure 6 This is a schematic diagram of the main structure of Example 3 of the present utility model;

[0026] Figure 7 for Figure 6 A schematic cross-sectional view of a partial structure of FIG.

[0027] Figure 8 Schematic diagram of the three-dimensional structure of the arc plate and the drive shaft;

[0028] Figure 9 A schematic structural diagram of another embodiment of a drive assembly;

[0029] Figure 10 A collection device.

[0030] Explanation of the accompanying symbols: 1. Screening box; 2. Feed hopper; 201. Bucket frame; 202. Cylinder; 3. Rotor; 4. Connecting rod; 5. Mounting plate; 6. Drive motor; 7. Dustpan; 8. Vibrator; 9. First guide plate; 10. Second guide plate; 11. Water pipe; 1101. Connecting pipe; 12. Atomizing nozzle; 13. Collecting box; 14. Third guide plate; 15. Arc plate; 16. Drive shaft; 17. Fixing rod; 18. Reducer motor; 19. Box. DETAILED DESCRIPTION

[0031] The core of the utility model is to provide a gravel screening device, which can reduce the probability of the screen holes being blocked.

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "middle", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0034] Example 1

[0035] like Figures 1 to 4 As shown, it includes a screening box 1, the top of the screening box 1 is connected to a feed hopper 2, a screen assembly is provided in the inner cavity of the screening box 1, one end of the screen assembly is rotatably connected to the inner wall of the screening box 1, and the other end of the screen assembly protrudes out of the screening box 1, and an opening is provided on the screening box 1 for the protruding end of the screen assembly to swing up and down, and one end of the screen assembly located in the screening box 1 is higher than the protruding end; a crank-connecting rod assembly is installed on the outer wall of the screening box 1, the crank-connecting rod assembly and the screen assembly are arranged correspondingly, and the crank-connecting rod assembly is rotatably connected to the protruding end of the screen assembly.

[0036] Specifically, the crank-connecting rod assembly and the screen assembly form a crank rocker mechanism, which drives one end of the screen assembly to swing up and down through the crank-connecting rod assembly, thereby causing the screen assembly to vibrate, making it less likely for gravel to get stuck on the screen holes, and reducing the probability of the screen holes being blocked.

[0037] There are at least two screen assemblies arranged at intervals up and down, and the sieve holes of the higher screen assembly among adjacent screen assemblies are larger than the sieve holes of the lower screen assembly; the higher end of the screen assembly at the top is arranged corresponding to the feed hopper 2; the protruding ends of adjacent screen assemblies face opposite directions.

[0038] Specifically, there are two screen assemblies shown in the drawings. By providing two or more screen assemblies and the sieve holes of different screen assemblies becoming smaller from top to bottom, the crushed stone can be graded and screened into a variety of different particle sizes.

[0039] The crank-connecting rod assembly includes a runner 3, a connecting rod 4, a mounting plate 5 and a drive motor 6. The mounting plate 5 is fixedly connected to the screening box 1, the drive motor 6 is fixedly connected to the mounting plate 5, the runner 3 is coaxially fixedly connected to the output shaft of the drive motor 6, an eccentric shaft is fixed on one end of the runner 3 away from the drive motor 6, one end of the connecting rod 4 is rotatably connected to the eccentric shaft, and the other end of the connecting rod 4 is rotatably connected to the protruding end of the corresponding screen assembly.

[0040] The screen assembly includes a dustpan 7 and several vibrators 8, the vibrators 8 are fixed to the bottom surface of the dustpan 7, the dustpan 7 has one end with a rear wall plate as the higher end, the higher end of the dustpan 7 is connected to the screening box 1 through a pin support, and the connecting rod 4 is connected to the bottom surface of the dustpan 7 through a hinge support; the screen holes of the screen assembly are opened on the bottom wall of the dustpan 7, and the screen holes are located in the screening box 1.

[0041] Specifically, the driving motor 6 drives the wheel 3 to rotate, and the wheel 3 drives the connecting rod 4 to move, and the connecting rod 4 drives one end of the dustpan 7 to swing up and down, thereby vibrating the dustpan 7, and making it less likely for the gravel to get stuck on the sieve holes, reducing the probability of the sieve holes being blocked. The vibration of the vibrator 8 drives the bottom wall of the dustpan 7 to vibrate, which can further make it less likely for the gravel to get stuck on the sieve holes. When in use, a collection device for collecting gravel can be set at the corresponding position of the lower end of each dustpan 7. For example, the collection device can be a bag or a box 19, and the gravel enters the collection device through the opening of the collection device. Only two dustpans 7 are shown in the accompanying drawings, so the box 19 can be placed directly on the ground; Figure 10 It is a collecting device, in which two or more boxes 19 are arranged on a cart at intervals, and it is suitable for the present invention with more than three dustpans 7.

[0042] The two sides of the dustpan 7 are in sliding contact with the inner wall of the screening box 1; a first guide plate 9 is correspondingly provided above the higher end of each dustpan 7, the first guide plate 9 is fixedly connected to the screening box 1, and the first guide plate 9 is arranged parallel to the corresponding dustpan 7; a second guide plate 10 is provided between adjacent dustpans 7, and the second guide plate 10 is arranged opposite to the first guide plate 9 between adjacent dustpans 7, the second guide plate 10 is arranged parallel to the higher dustpan 7, the second guide plate 10 is fixedly connected to the screening box 1, the second guide plate 10 is greater than or equal to the length of the first guide plate 9, and there is a gap at the end where the first guide plate 9 and the second guide plate 10 are close to each other.

[0043] Specifically, first guide plate 9 guides gravel falling from above the upper end of dustpan 7, preventing it from falling between the upper end of dustpan 7 and the inner wall of screening box 1. Second guide plate 10 guides gravel falling from the sieve holes of dustpan 7 above it, directing it to the upper end of dustpan 7 below second guide plate 10. In summary, gravel always rolls from the upper end of dustpan 7 to the lower end, ensuring sufficient screening time and travel for the gravel on dustpan 7, preventing some gravel from being fully screened and being discharged directly from the lower end of dustpan 7.

[0044] It also includes a collecting box 13, which is placed in the screening box 1 and below the dustpan 7 at the bottom. A third guide plate 14 is provided between the collecting box 13 and the dustpan 7 at the bottom. Two third guide plates 14 are provided and are respectively arranged corresponding to the two ends of the dustpan 7 at the bottom. The third guide plates 14 are fixedly connected to the screening box 1. The two third guide plates 14 are arranged in an inverted eight shape, and there is a gap at one end of the two third guide plates 14 that are close to each other.

[0045] Specifically, the gravel on the top dustpan 7 that cannot pass through the sieve holes is discharged from its lower end, and the gravel that can pass through the sieve holes falls on the dustpan 7 below. Finally, the gravel that falls from the sieve holes of the bottom dustpan 7 enters the collection box 13, completing the automatic collection of the gravel. The door of the screening box 1 is opened to take out the collection box 13. The third guide plate 14 guides the gravel so that the gravel enters the collection box 13 and prevents the gravel from falling on the bottom wall of the screening box 1.

[0046] The present invention provides a gravel screening device that operates as follows: Gravel to be screened enters the inner cavity of a screening box 1 through a feed hopper 2 and lands on a dustpan 7, thereby initiating screening. During the screening process, gravel on the top dustpan 7 that cannot pass through the sieve apertures is discharged from its lower end, while gravel that can pass through the sieve apertures falls onto the dustpan 7 below. Finally, gravel that falls through the sieve apertures of the bottom dustpan 7 enters a collection box 13. By providing two or more dustpans 7 with sieve apertures that progressively decrease in size from top to bottom, gravel can be graded and screened into various particle sizes. During the screening process, a drive motor 6 rotates a runner 3, which in turn drives a connecting rod 4, which in turn drives one end of the dustpan 7 to swing up and down, vibrating the dustpan 7. This makes it less likely for gravel to get stuck in the sieve apertures, reducing the probability of clogging. The vibration of a vibrator 8 drives the bottom wall of the dustpan 7 to vibrate, further reducing the likelihood of gravel getting stuck in the sieve apertures.

[0047] Example 2

[0048] Example 2 is implemented on the basis of Example 1, with the addition of a dust reduction component.

[0049] like Figure 2 、 3 As shown in Figure 5, the apparatus further includes a water pipe 11, which is fixedly connected to the outer wall of the screening box 1. A plurality of atomizing nozzles 12 are connected to the water pipe 11. The screening box 1 has through-holes corresponding to the atomizing nozzles 12, and the atomizing nozzles 12 are located within the through-holes. Specifically, a large amount of dust is generated during the gravel screening process. Water is supplied to the water pipe 11 through an external pump assembly. The water is atomized by the atomizing nozzles 12 to produce water mist, thereby reducing dust. Figure 2 and Figure 5 As shown, there are two water pipes 11 , which are connected via a connecting pipe 1101 , and any one of the water pipes 11 is connected to an externally provided pump assembly.

[0050] Example 3

[0051] Example 3 is implemented on the basis of Example 1, and the feeding amount of crushed stones into the inner cavity of the screening box 1 can be adjusted.

[0052] like Figures 6-8As shown, the feed hopper 2 includes a bucket-shaped frame 201 and a cylinder 202, and sealing plates are fixed at both ends of the cylinder 202. The cylinder 202 is horizontally fixed on the top wall of the screening box 1 and is connected to the inner cavity of the screening box 1. The bottom end of the bucket-shaped frame 201 is fixedly connected to the circumferential outer wall of the cylinder 202 and is connected to the inner cavity of the cylinder 202; an arc-shaped plate 15 is coaxially rotated in the cylinder 202, and the outer wall diameter of the arc-shaped plate 15 matches the inner wall diameter of the cylinder 202. The arc-shaped plate 15 is correspondingly arranged at the connection between the cylinder 202 and the bucket-shaped frame 201; a drive shaft 16 is coaxially rotated in the cylinder 202, and a number of fixed rods 17 are fixedly connected between the drive shaft 16 and the arc-shaped plate 15; and a drive assembly is also included that is coaxially fixedly connected to one end of the drive shaft 16.

[0053] Specifically, the drive assembly drives the drive shaft 16 to rotate, the drive shaft 16 drives the fixed rod 17 to rotate, and the fixed rod 17 drives the curved plate 15 to rotate. The size of the opening at the connection between the cylinder 202 and the bucket frame 201 can be adjusted by adjusting the rotation angle of the curved plate 15, and the feed amount of gravel entering the inner cavity of the screening box 1 can be adjusted.

[0054] The driving assembly includes a reduction motor 18 , which is fixedly connected to the outer wall of any blocking plate. The output shaft of the reduction motor 18 rotates through the blocking plate and is fixedly connected to the driving shaft 16 .

[0055] like Figure 9 As shown, the drive assembly can also be a crank rocker mechanism, which is only briefly described here: the remote control arm is fixedly connected to one end of the drive shaft 16, the crank is a disc with an eccentric rod, the rocker arm and the eccentric rod are connected by a hinged rod, and the disc is rotated by a motor installed at the top of the screening box 1.

[0056] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. Similar parts between the various embodiments can be referred to in conjunction with each other, and the various embodiments can be combined with each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For relevant parts, refer to the method description.

[0057] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A crushed stone screening device, characterized in that: The invention comprises a screening box (1), wherein the top of the screening box (1) is connected to a feed hopper (2), a screen assembly is provided in the inner cavity of the screening box (1), one end of the screen assembly is rotatably connected to the inner wall of the screening box (1), the other end of the screen assembly protrudes from the screening box (1), and an opening for the protruding end of the screen assembly to swing up and down is provided on the screening box (1), and one end of the screen assembly located in the screening box (1) is higher than the protruding end; a crank connecting rod assembly is installed on the outer wall of the screening box (1), the crank connecting rod assembly is arranged corresponding to the screen assembly, and the crank connecting rod assembly is rotatably connected to the protruding end of the screen assembly.

2. The gravel screening device according to claim 1, characterized in that: The screen assemblies are provided with at least two and are spaced apart from each other. The sieve holes of the higher one of the adjacent screen assemblies are larger than the sieve holes of the lower one. The higher end of the screen assembly at the top is arranged corresponding to the feed hopper (2). The protruding ends of the adjacent screen assemblies face in opposite directions.

3. The crushed stone screening device according to claim 1 or 2, characterized in that: The crank-connecting rod assembly comprises a rotating wheel (3), a connecting rod (4), a mounting plate (5) and a driving motor (6); the mounting plate (5) is fixedly connected to the screening box (1); the driving motor (6) is fixedly connected to the mounting plate (5); the rotating wheel (3) is coaxially fixedly connected to the output shaft of the driving motor (6); an eccentric shaft is fixed to one end of the rotating wheel (3) away from the driving motor (6); one end of the connecting rod (4) is rotatably connected to the eccentric shaft; and the other end of the connecting rod (4) is rotatably connected to the protruding end of the corresponding screen assembly.

4. The gravel screening device according to claim 3, characterized in that: The screen assembly comprises a dustpan (7) and a plurality of vibrators (8), wherein the vibrators (8) are fixed to the bottom surface of the dustpan (7), the dustpan (7) has one end with a rear wall plate as a higher end, the higher end of the dustpan (7) is connected to the screening box (1) via a pin support, and the connecting rod (4) is connected to the bottom surface of the dustpan (7) via a hinge support; the screen holes of the screen assembly are opened on the bottom wall of the dustpan (7), and the screen holes are located in the screening box (1).

5. The gravel screening device according to claim 4, characterized in that: Both sides of the dustpan (7) are in sliding contact with the inner wall of the screening box (1); a first guide plate (9) is correspondingly provided above the higher end of each dustpan (7), the first guide plate (9) is fixedly connected to the screening box (1), and the first guide plate (9) is arranged in parallel with the corresponding dustpan (7); a second guide plate (10) is provided between adjacent dustpans (7), and the second guide plate (10) is arranged relative to the first guide plate (9) between adjacent dustpans (7), the second guide plate (10) is arranged in parallel with the higher dustpan (7), the second guide plate (10) is fixedly connected to the screening box (1), the second guide plate (10) is greater than or equal to the length of the first guide plate (9), and there is a gap between the ends of the first guide plate (9) and the second guide plate (10) that are close to each other.

6. The crushed stone screening device according to claim 1 or 2, characterized in that: The invention also includes a water pipe (11), wherein the water pipe (11) is fixedly connected to the outer wall of the screening box (1), and a plurality of atomizing nozzles (12) are connected to the water pipe (11). Through holes are opened on the screening box (1) in a one-to-one correspondence with the atomizing nozzles (12), and the atomizing nozzles (12) are located in the through holes.

7. The gravel screening device according to claim 5, characterized in that: The invention also includes a collecting box (13), which is placed in the screening box (1) and below the dustpan (7) at the bottom. A third guide plate (14) is provided between the collecting box (13) and the dustpan (7) at the bottom. Two third guide plates (14) are provided and are respectively arranged corresponding to the two ends of the dustpan (7) at the bottom. The third guide plates (14) are fixedly connected to the screening box (1). The two third guide plates (14) are arranged in an inverted eight-shaped shape, and the ends of the two third guide plates (14) that are close to each other are spaced apart.

8. The gravel screening device according to claim 1, characterized in that: The feed hopper (2) comprises a bucket-shaped frame (201) and a cylinder (202), both ends of the cylinder (202) are fixed with blocking plates, the cylinder (202) is horizontally fixed on the top wall of the screening box (1) and communicates with the inner cavity of the screening box (1), the bottom end of the bucket-shaped frame (201) is fixedly connected to the circumferential outer wall of the cylinder (202) and communicates with the inner cavity of the cylinder (202); an arc-shaped plate (15) is coaxially rotated in the cylinder (202), The outer wall diameter of the arc plate (15) matches the inner wall diameter of the cylinder (202), and the arc plate (15) is correspondingly arranged at the connection point between the cylinder (202) and the bucket-shaped frame (201); a driving shaft (16) is coaxially rotated in the cylinder (202), and a plurality of fixing rods (17) are fixedly connected between the driving shaft (16) and the arc plate (15); and a driving assembly is also included that is coaxially fixedly connected to one end of the driving shaft (16).

9. The gravel screening device according to claim 8, characterized in that: The driving assembly comprises a reduction motor (18), the reduction motor (18) being fixedly connected to the outer wall of any one of the blocking plates, and the output shaft of the reduction motor (18) rotatingly passes through the blocking plate and is fixedly connected to the driving shaft (16).

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