A multi-layered sand and gravel screening apparatus

Abstract

The utility model relates to sand and stone material screening technical field, and disclose a multilayer sand and stone material screening equipment, including U shape casing, the inside rotation of U shape casing is connected with three rotating axes, the outside of two rotating axes of top is equipped with two screening plates, the screen hole diameter of top screening plate is greater than the screen hole diameter of below screening plate. The utility model discloses through setting up two layers of screening plate of different aperture, and combining respective corresponding material guide inclined frame, realized sand and stone material's accurate grading and classified collection, sets up one drive assembly and drives two screening plates and discharge plate to carry out up and down shaking simultaneously, not only has improved screening efficiency, can effectively prevent screen hole blockage, has guaranteed long -time stable operation, the feeding mechanism adopts the mode that staggered inclination's feeding plate combines with buffer assembly, and material is passed through multiple buffering and deceleration before entering screening main body, greatly alleviated the direct impact to screening plate, reduced the noise and dust, protected the equipment.

Description

Technical Field

[0001] This utility model relates to the field of sand and gravel screening technology, and in particular to a multi-layer sand and gravel screening device. Background Technology

[0002] In the production or use of sand and gravel, it is generally necessary to screen the sand and gravel according to the particle size of the produced or used materials in order to meet the needs of different applications.

[0003] Most existing sand and gravel screening equipment has only one function, that is, it can only screen sand and gravel of one size requirement. The screening effect is not precise enough, which reduces the screening efficiency of sand and gravel. At the same time, when feeding, the material often directly impacts the screen, which not only generates a lot of noise and dust, but also easily damages the screen and shortens the service life of the equipment. Therefore, a multi-layer sand and gravel screening equipment is proposed to solve the above problems. Utility Model Content

[0004] (a) Purpose of the utility model To address the technical problems existing in the background art, this utility model proposes a multi-layer sand and gravel screening device. By setting up two layers of screening plates with different apertures and combining them with their corresponding guide frames, it realizes the precise grading and classification collection of sand and gravel, and has the advantages of being able to perform multi-layer screening of sand and gravel and improving screening efficiency.

[0005] (II) Technical Solution This utility model provides a multi-layer sand and gravel screening device, including a U-shaped shell. Three rotating shafts are rotatably connected inside the U-shaped shell. Two screening plates are provided on the outer sides of the two upper rotating shafts. The diameter of the screen holes of the upper screening plate is larger than that of the screen holes of the lower screening plate.

[0006] The right side of the U-shaped shell is provided with two guide frames, which correspond to the ends of the two screening plates away from the rotating shaft, and the two guide frames are symmetrically distributed.

[0007] The lower rotating shaft is rotatably connected to a discharge plate, and the right side of the U-shaped housing is provided with a discharge inclined frame, which corresponds to the end of the discharge plate away from the rotating shaft.

[0008] A shaking mechanism is provided above the U-shaped shell. The shaking mechanism is connected to the two screening plates and the discharge plate, and is used to drive the two screening plates and the discharge plate to shake.

[0009] The top of the U-shaped shell is connected to a feeding frame, and a feeding mechanism is provided inside the feeding frame.

[0010] Preferably, the shaking mechanism includes a crossbar located at the top of the U-shaped housing, and a driving assembly is provided at the top of the U-shaped housing. The driving assembly is connected to the crossbar and is used to drive the crossbar to perform up-and-down reciprocating motion.

[0011] The bottom of the crossbar is provided with two vertical bars, which are located on the front and back of the U-shaped shell respectively. The two screening plates and the discharge plate are provided with support rods at the ends away from the rotating shaft. The right side of the two vertical bars is provided with three support blocks. The interior of the six support blocks is provided with support grooves. The two ends of the support rods are slidably connected to the interiors of the corresponding two support grooves.

[0012] The U-shaped shell has three guide frames on both the front and back sides. The vertical rod is slidably connected to the interior of the corresponding three guide frames. The three guide frames on the same side are staggered with the three support blocks.

[0013] Preferably, the drive assembly includes a U-shaped frame disposed on the top of the U-shaped housing, a geared motor disposed on the top of the U-shaped frame, a rotating disk disposed on the output shaft of the geared motor, a fixed rod disposed on the outer edge of the rotating disk away from the geared motor, a connecting rod rotatably connected to the outer side of the fixed rod, and the end of the connecting rod away from the fixed rod being hinged to the top of the crossbar by a pin.

[0014] Preferably, the feeding mechanism includes a feeding funnel connected to the top of the feeding frame, two rotating rods are rotatably connected to the inner side of the feeding frame, and feeding plates are provided on the outer sides of the two rotating rods. The two feeding plates are staggered and symmetrically distributed, and their opposite sides are inclined downwards. A buffer assembly for buffering the feeding plates is provided on the inner side of the feeding frame.

[0015] Preferably, the buffer assembly includes a fixing block disposed inside the feed frame, the top of the fixing block is provided with a fixing groove, an abutment block is slidably connected inside the fixing groove, a plurality of springs are provided on the inner bottom wall of the fixing groove, the other end of the plurality of springs is connected to the bottom of the abutment block, the top of the abutment block is arc-shaped and slidably connected to the bottom of the feed plate.

[0016] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects: This multi-layered sand and gravel screening equipment achieves precise grading and classification of sand and gravel by setting up two layers of screening plates with different apertures and combining them with corresponding guide frames. A drive component simultaneously drives the two screening plates and the discharge plate to vibrate up and down, which not only improves screening efficiency but also effectively prevents screen hole clogging and ensures stable operation over a long period of time. The feeding mechanism adopts a combination of staggered inclined feeding plates and buffer components. Before the material enters the screening body, it undergoes multiple buffering and deceleration processes, which greatly reduces the direct impact on the screening plates, reduces noise and dust, and protects the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a multi-layer sand and gravel screening device proposed in this utility model.

[0018] Figure 2 This utility model presents a three-dimensional structural diagram of a multi-layer sand and gravel screening device, comprising a U-shaped shell, screening plate, guide frame, discharge plate, discharge frame, and shaking mechanism.

[0019] Figure 3 This invention provides a cross-sectional view of a multi-layer sand and gravel screening device, comprising a U-shaped shell, a screening plate, a guide frame, a discharge plate, and a discharge frame.

[0020] Figure 4 This is a three-dimensional structural diagram of the shaking mechanism in a multi-layer sand and gravel screening device proposed in this utility model.

[0021] Figure 5 This is a three-dimensional structural diagram of the crossbar and drive assembly in a multi-layer sand and gravel screening device proposed in this utility model.

[0022] Figure 6 This is a cross-sectional view of the feeding frame and feeding mechanism in a multi-layer sand and gravel screening device proposed in this utility model.

[0023] Figure 7 This is an exploded cross-sectional view of the feed plate and buffer assembly in a multi-layer sand and gravel screening device proposed in this utility model.

[0024] Reference numerals: 1. U-shaped shell; 2. Screening plate; 3. Guide frame; 4. Discharge plate; 5. Discharge frame; 6. Vibration mechanism; 61. Crossbar; 62. Drive assembly; 621. U-shaped frame; 622. Gear motor; 623. Rotating disc; 624. Fixed rod; 625. Connecting rod; 63. Vertical rod; 64. Support rod; 65. Support block; 66. Support groove; 67. Guide frame; 7. Feeding frame; 8. Feeding mechanism; 81. Feeding funnel; 82. Feeding plate; 83. Buffer assembly; 831. Fixed block; 832. Fixed groove; 833. Abutment block; 834. Spring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, such as welding, riveting, or bonding; it can also be a detachable connection, such as threaded connection, keyed connection, or pin connection; or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] like Figure 1-7 As shown, the present invention proposes a multi-layer sand and gravel screening device, including a U-shaped shell 1. Three rotating shafts are rotatably connected inside the U-shaped shell 1. Two screening plates 2 are provided on the outer sides of the two upper rotating shafts. The screen hole diameter of the upper screening plate 2 is larger than that of the lower screening plate 2. The sand and gravel can be screened in multiple layers through the two screening plates 2. At the same time, by using screening plates 2 with different screen hole diameters, sand and gravel of different sizes are left on the top of screening plates 2 with screen holes of different diameters.

[0029] Two guide frames 3 are provided on the right side of the U-shaped shell 1. The two guide frames 3 correspond to the ends of the two screening plates 2 away from the rotating shaft, and the two guide frames 3 are symmetrically distributed. After screening, the sand and gravel on the two screening plates 2 will fall into the corresponding guide frames 3. The sand and gravel of different sizes will be discharged through the corresponding guide frames 3. The two guide frames 3 are symmetrically arranged so that sand and gravel of different sizes can be discharged to the front and back of the U-shaped shell 1 respectively, which is convenient for collecting sand and gravel of different diameters.

[0030] The lower rotating shaft is connected to the discharge plate 4. The right side of the U-shaped shell 1 is provided with a discharge inclined frame 5. The discharge inclined frame 5 corresponds to the end of the discharge plate 4 away from the rotating shaft. The discharge plate 4 has no screen holes, which makes it easy to receive the smallest sand and gravel. At the same time, the smallest sand and gravel falls into the discharge inclined frame 5 through the discharge plate 4, and the smallest sand and gravel is discharged to the right side of the U-shaped shell 1 through the discharge inclined frame 5, so as to collect the smallest sand and gravel.

[0031] A shaking mechanism 6 is provided above the U-shaped shell 1. The shaking mechanism 6 is connected to the two screening plates 2 and the discharge plate 4. It is used to drive the two screening plates 2 and the discharge plate 4 to shake. The shaking mechanism 6 can drive the two screening plates 2 and the discharge plate 4 to shake up and down, which not only improves the screening efficiency and makes the sand and gravel on the two screening plates 2 and the discharge plate 4 fall stably, but also effectively prevents the screen holes from clogging and ensures long-term stable operation.

[0032] The top of the U-shaped housing 1 is connected to the feed frame 7, and the feed frame 7 is equipped with a feeding mechanism 8. Through the feed frame 7 and the feeding mechanism 8, the sand and gravel can fall to the top of the uppermost screening plate 2. This allows the sand and gravel to undergo multiple buffering and decelerations before entering the U-shaped housing 1, greatly reducing the direct impact on the uppermost screening plate 2, reducing noise and dust, and protecting the equipment.

[0033] In the first embodiment, the shaking mechanism 6 includes a crossbar 61 located at the top of the U-shaped housing 1. A drive assembly 62 is provided at the top of the U-shaped housing 1. The drive assembly 62 is connected to the crossbar 61 and is used to drive the crossbar 61 to move up and down reciprocally. The drive assembly 62 can drive the crossbar 61 to move up and down reciprocally.

[0034] Two vertical rods 63 are provided at the bottom of the crossbar 61. The two vertical rods 63 are located on the front and back of the U-shaped shell 1, respectively. Support rods 64 are provided inside the two screening plates 2 and the discharge plate 4 at the ends away from the rotating shaft. Three support blocks 65 are provided on the right side of the two vertical rods 63. Support grooves 66 are opened inside the six support blocks 65. The two ends of the support rods 64 are slidably connected to the two corresponding support grooves 66.

[0035] When the horizontal bar 61 moves up and down, it drives the two vertical bars 63 to move up and down. The vertical bars 63 drive the support block 65 to move up and down. The support block 65 drives the support groove 66 to move up and down. Under the action of the two support grooves 66 at both ends of the support rod 64, the support rod 64 slides inside the corresponding two support grooves 66. The two support grooves 66 drive the support rod 64 to move up and down. Thus, the support rod 64 drives the two screening plates 2 and the discharge plate 4 to move up and down like a rocker with its left-side pivot as the fulcrum, achieving efficient screening and discharge.

[0036] The U-shaped housing 1 has three guide frames 67 on both the front and back. The vertical rod 63 is slidably connected to the corresponding three guide frames 67. The three guide frames 67 on the same side are staggered with the three support blocks 65. The three guide frames 67 can guide the vertical rod 63, so that the vertical rod 63 is stable when it moves up and down.

[0037] In embodiment 2, the drive assembly 62 includes a U-shaped frame 621 located on the top of the U-shaped housing 1. A reduction motor 622 is located on the top of the U-shaped frame 621. A rotating disk 623 is located on the output shaft of the reduction motor 622. A fixing rod 624 is located on the outer edge of the rotating disk 623 away from the reduction motor 622. A connecting rod 625 is rotatably connected to the outer side of the fixing rod 624. The end of the connecting rod 625 away from the fixing rod 624 is hinged to the top of the crossbar 61 by a pin.

[0038] When the geared motor 622 is started, the output shaft of the geared motor 622 will drive the rotating disk 623 to rotate, the rotating disk 623 will drive the fixed rod 624 to rotate, the fixed rod 624 will drive the top of the connecting rod 625 to rotate, and the bottom of the connecting rod 625 will drive the crossbar 61 to move up and down.

[0039] The distance between the top of the support block 65 and the bottom of the guide frame 67 above it is greater than the diameter of the rotating disk 623, so as to prevent the support block 65 from being limited by the guide frame 67 above it when the support block 65 is moving up and down.

[0040] In embodiment 3, the feeding mechanism 8 includes a feeding funnel 81 connected to the top of the feeding frame 7. Two rotating rods are rotatably connected to the inside of the feeding frame 7. Feeding plates 82 are provided on the outside of the two rotating rods. The two feeding plates 82 are symmetrically distributed in an alternating manner, and their opposite sides are inclined downwards. A buffer assembly 83 is provided on the inside of the feeding frame 7 to buffer the feeding plates 82.

[0041] During feeding, the sand and gravel are directly fed into the feed hopper 81 and then fall onto the top of the two feed plates 82. The two feed plates 82 support the material, and the inclined setting of the two feed plates 82 ensures that the sand and gravel fall onto the top of the upper screen plate 2, thus avoiding the situation where the sand and gravel fall directly onto the top of the upper screen plate 2 and cause damage to the upper screen plate 2.

[0042] In embodiment four, the buffer assembly 83 includes a fixing block 831 located inside the feed frame 7. The top of the fixing block 831 is provided with a fixing groove 832. An abutment block 833 is slidably connected inside the fixing groove 832. A plurality of springs 834 are provided on the inner bottom wall of the fixing groove 832. The other end of each of the plurality of springs 834 is connected to the bottom of the abutment block 833. The top of the abutment block 833 is arc-shaped and is slidably connected to the bottom of the feed plate 82.

[0043] When sand and gravel impact, the feed plate 82 rotates. The rotation of the feed plate 82 will squeeze the abutment block 833 to move downward. The abutment block 833 will squeeze multiple springs 834. Under the action of the rebound force of multiple springs 834, the abutment block 833 is buffered, thereby buffering the feed plate 82. At the same time, the elasticity of the springs 834 effectively absorbs the impact energy, realizing the buffering and deceleration of the sand and gravel. After two stages of buffering, the material falls smoothly into the U-shaped shell 1 for screening, which greatly protects the screening plate 2.

[0044] In Example 5, the bottom of the U-shaped housing 1 is provided with a base to ensure the stability of the sand and gravel screening equipment. A PCL controller is provided on the outside of the U-shaped housing 1. The geared motor 622 is electrically connected to the PCL controller, and the geared motor 622 can be controlled through the PCL controller.

[0045] Working principle: When this multi-layer sand and gravel screening equipment is in use, starting the geared motor 622 activates the shaking mechanism 6, causing the two screening plates 2 and the discharge plate 4 to continuously shake up and down. The sand and gravel enter the equipment evenly and with buffer from the feeding mechanism 8, first falling onto the upper screening plate 2. Small and medium-sized particles fall through the screen holes, while large particles move to the right along the plate surface under the shaking action and are finally discharged from the upper guide frame 3. Meanwhile, the small and medium-sized particles that fall onto the lower screening plate 2 continue to be screened. Small particles fall through the screen holes, medium-sized particles move to the right and are discharged from the lower guide frame 3, and small particles are received by the discharge plate 4 and conveyed to the right, finally being discharged from the discharge frame 5, completing the entire grading and screening process.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-layer sand and gravel screening device, characterized in that, Includes a U-shaped shell (1), the U-shaped shell (1) is rotatably connected to three rotating shafts, and two screening plates (2) are provided on the outer sides of the two upper rotating shafts. The diameter of the sieve hole of the upper screening plate (2) is larger than the diameter of the sieve hole of the lower screening plate (2). The U-shaped shell (1) is provided with two guide frames (3) on the right side. The two guide frames (3) correspond to the ends of the two screening plates (2) away from the rotating shaft, and the two guide frames (3) are symmetrically distributed. The lower rotating shaft is rotatably connected to a discharge plate (4), and the right side of the U-shaped housing (1) is provided with a discharge inclined frame (5), which corresponds to the end of the discharge plate (4) away from the rotating shaft; A shaking mechanism (6) is provided above the U-shaped shell (1). The shaking mechanism (6) is connected to the two screening plates (2) and the discharge plate (4) and is used to drive the two screening plates (2) and the discharge plate (4) to shake. The top of the U-shaped shell (1) is connected to a feeding frame (7), and a feeding mechanism (8) is provided inside the feeding frame (7).

2. The multi-layer sand and gravel screening equipment according to claim 1, characterized in that, The shaking mechanism (6) includes a crossbar (61) located at the top of the U-shaped housing (1). A drive assembly (62) is provided at the top of the U-shaped housing (1). The drive assembly (62) is connected to the crossbar (61) and is used to drive the crossbar (61) to move up and down reciprocally. The bottom of the crossbar (61) is provided with two vertical bars (63), the two vertical bars (63) are located on the front and back of the U-shaped shell (1) respectively, and the two screening plates (2) and the discharge plate (4) are provided with support rods (64) at the ends away from the rotating shaft. The right side of the two vertical bars (63) is provided with three support blocks (65), and the interior of the six support blocks (65) is provided with support grooves (66). The two ends of the support rods (64) are slidably connected to the interior of the corresponding two support grooves (66). The U-shaped shell (1) has three guide frames (67) on both the front and back sides. The vertical rod (63) is slidably connected to the interior of the corresponding three guide frames (67). The three guide frames (67) on the same side are staggered with the three support blocks (65).

3. The multi-layer sand and gravel screening equipment according to claim 2, characterized in that, The drive assembly (62) includes a U-shaped frame (621) located on the top of the U-shaped housing (1). A geared motor (622) is located on the top of the U-shaped frame (621). A rotating disk (623) is located on the output shaft of the geared motor (622). A fixed rod (624) is located on the outer edge of the rotating disk (623) away from the geared motor (622). A connecting rod (625) is rotatably connected to the outer side of the fixed rod (624). The end of the connecting rod (625) away from the fixed rod (624) is hinged to the top of the crossbar (61) by a pin.

4. The multi-layer sand and gravel screening equipment according to claim 1, characterized in that, The feeding mechanism (8) includes a feeding funnel (81) connected to the top of the feeding frame (7). Two rotating rods are rotatably connected to the inside of the feeding frame (7). Feeding plates (82) are provided on the outside of the two rotating rods. The two feeding plates (82) are symmetrically distributed and their opposite sides are inclined downwards. A buffer assembly (83) is provided on the inside of the feeding frame (7) to buffer the feeding plates (82).

5. A multi-layer sand and gravel screening device according to claim 4, characterized in that, The buffer assembly (83) includes a fixing block (831) located inside the feed frame (7). The top of the fixing block (831) is provided with a fixing groove (832). An abutment block (833) is slidably connected inside the fixing groove (832). Multiple springs (834) are provided on the inner bottom wall of the fixing groove (832). The other end of each of the multiple springs (834) is connected to the bottom of the abutment block (833). The top of the abutment block (833) is arc-shaped and slidably connected to the bottom of the feed plate (82).

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