Adjustable screening machine

Abstract

The utility model discloses an adjustable screening machine which comprises a machine frame, a transversely-arranged conveying belt is arranged on the machine frame, a plurality of screening rollers are arranged in the conveying belt and rotate along with the conveying belt, the screening rollers are parallel to one another, and gaps exist between the adjacent screening rollers. A plurality of adjusting devices capable of adjusting gaps among the screening rollers are arranged on the machine frame, and a plurality of collecting devices capable of collecting materials falling from the gaps among the screening rollers are arranged on the lower side of the conveying belt. The device has the advantages of adjustable screening size, multi-level screening, high efficiency, strong applicability and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to screening equipment technical field, concretely is a kind of adjustable screening machine. BACKGROUND

[0002] Screening machine is mainly used to distinguish different size materials, and the material is screened and filtered through screening machine, to meet the needs of different fields. The existing screening machine mostly uses roller or screening roller, and the screening holes of different diameters are arranged on the roller, or the different gaps are arranged on the screening roller, to screen the material. The diameter of the screening hole of the roller is difficult to change, and the roller needs to be replaced if different materials are to be screened. For the screening roller, the gap of the screening roller is fixed, and different equipment needs to be replaced if multi-stage material is to be screened, which is difficult to meet the different diameter screening requirements of different materials. SUMMARY

[0003] The utility model solves the technical problem to provide a kind of adjustable screening machine that can screen different size materials and adjust screening size.

[0004] To solve the above technical problems, the utility model includes rack, and its structural characteristics are: the rack is provided with horizontally arranged conveying belt, the conveying belt is provided with multiple screening rollers, the screening rollers rotate with the conveying belt, the screening rollers are parallel to each other, and there is a gap between adjacent screening rollers, the rack is provided with multiple adjusting devices capable of adjusting the gap between the screening rollers, and the lower side of the conveying belt is provided with multiple collecting devices capable of collecting materials falling from the gap between the screening rollers.

[0005] After the above structure is adopted, the conveying belt drives the screening rollers to rotate, then the screening rollers move the materials from the discharging end of the conveying belt to the discharging end, there is a gap between the screening rollers, so the materials with a diameter smaller than the gap between the screening rollers will fall from the gap between the screening rollers and fall into the collecting device, the gap between the screening rollers is adjusted by the adjusting device, so the gap becomes larger, the materials with a size smaller than the gap at the adjusting device will fall into the collecting device below when the materials on the screening rollers are driven to the adjusting device, the gap between the screening rollers is adjusted by different adjusting devices, and the gap gradually increases from the discharging end to the discharging end, to realize the screening of materials of different sizes, and the adjusting device can be adjusted to adapt to the size requirements of different materials, thereby improving economic benefits and screening efficiency.

[0006] The collecting device is a discharging conveyor belt, the position of the discharging conveyor belt corresponds to the position of the adjusting device, the discharging conveyor belt is longitudinally arranged, and the screened materials are longitudinally transported out through the discharging conveyor belt, to save the collecting process and improve efficiency.

[0007] The both ends of the screening roller of the conveying belt are provided with chains, the inner sides of the two chains are provided with track plates, the track plates are provided with guide holes, the both ends of the screening roller are provided with sliding rods which can extend into the guide holes and slide up and down along the guide holes, the diameter of the screening roller is greater than the diameter of the sliding rod, one end of the conveying belt is provided with two driving wheels which are symmetrically arranged, the other end of the conveying belt is provided with two driven wheels which are symmetrically arranged, the two driving wheels are respectively connected with the chains and are connected with each other through a shaft, the two driven wheels are respectively engaged with the two chains and are connected with each other through a shaft, the shaft between the two driving wheels is driven to rotate by a driving device, thereby driving the driving wheels to rotate, the rotation of the driving wheels drives the chains to rotate, thereby driving the screening roller to rotate, the sliding rod of the screening roller slides up and down along the guide hole, the horizontal distance between the screening rollers is unchanged, when the height is changed, the distance between the adjacent screening rollers is increased, thereby allowing larger size materials to be leaked, the structure is simple, the adjustment of the gap is convenient, and the efficiency is improved.

[0008] The adjusting device comprises a base mounted on the rack, the base is located on the outer side of the track plate and on the lower side of the sliding rod, one side of the upper end of the base is fixedly connected with a first supporting block, the other side of the upper end of the base is hingedly connected with a second supporting block which can rotate, the first supporting block is located on one side of the feeding port of the conveying belt, the upper end surface of the first supporting block is inclinedly arranged, the upper end surface of the first supporting block gradually increases in height from far to near, the upper end surface of the adjusting device is higher than the lower end surface of the guide hole and lower than the upper end surface of the guide hole, the distance between the upper end surface of the adjusting device and the lower end surface of the guide hole is not less than the diameter of the sliding rod, the second supporting block is located on the lower side of the sliding rod and can drive the sliding rod to move in the guide hole, the second supporting block is provided with a moving device which can drive the second supporting block to rotate along the shaft, when the screening roller passes through the adjusting device, the sliding rod of the screening roller slides in the guide hole along the upper end surface of the first supporting block or the second supporting block, until the upper end surface of the base, in the sliding process, since the height of the upper end surface of the base is higher than the bottom of the guide hole, the screening roller is upwardly moved, at this time, the second supporting block can rotate, when the second supporting block is lifted upward, the angle is slower, the height difference between the adjacent screening rollers is smaller, and the gap between the adjacent screening rollers is increased less, when the second supporting block is downwardly moved, the angle is faster, the height difference between the adjacent screening rollers is greater, and the gap is increased more, by adjusting the angle of the second supporting block, the gap between the screening rollers is adjusted, the structure is reliable and stable, and the adjustment and operation are convenient.

[0009] The thickness of the second supporting block is greater than the thickness of the first supporting block, the stability of the second supporting block is increased, the second supporting block is prevented from being broken when it is supported by force, and the adjustment effect is ensured.

[0010] The moving device includes a vertically arranged lead screw and a nut that rotates with the lead screw. A moving block is fixed to the nut. The moving block extends into the lower side of the second support block and contacts the lower end face of the second support block. The rotation of the lead screw drives the nut to move up and down, thereby driving the rotation of the second support block, and thus adjusting the gap of the screening roller sliding on the adjusting device. The structure is simple, easy to operate, and the adjustment is stable.

[0011] The lead screw is equipped with an adjusting rod that can drive the lead screw to rotate. A first gear is mounted on the adjusting rod. Chains are mounted on the first gears of the adjusting rods of the two opposing moving devices. The first gears link the two opposing moving devices together, ensuring that the adjustment gaps of the two adjusting devices are consistent when the screening roller moves to this position, thus ensuring the stability of the screening roller and the stability of material transportation and screening.

[0012] The frame is provided with a guide groove, which is located below the adjustment device. The lower end of the guide groove is inclined toward the feeding conveyor belt. The guide groove collects the falling material onto the feeding conveyor belt, preventing the material from falling.

[0013] In summary, this utility model has the advantages of adjustable screening size, multi-level screening, high efficiency, and strong applicability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a top view of the structure of the present invention (adjustment device not shown).

[0016] Figure 3 This is a schematic diagram of the connection between the screening roller and the track plate;

[0017] Figure 4 A schematic diagram of the adjustment device;

[0018] Figure 5 A schematic diagram showing the second support block in the adjustment device at another angle;

[0019] Figure 6 This is a schematic diagram of the structure where the screening roller is located at the adjustment device;

[0020] Figure 7 This is a schematic diagram of the screening roller and adjustment device when the second support block is at another angle. Detailed Implementation

[0021] like Figures 1-3 As shown, an adjustable screening machine includes a frame 1, on which a conveyor belt 2 for transporting materials is mounted. For ease of description, let... Figure 1Left is left, right is right, set Figure 1 Front is forward, back is backward, Figure 1 The left and right directions are horizontal, Figure 1 The front and back directions are vertical. The conveying conveyor belt 2 is provided with a plurality of screening rollers 21 arranged in parallel, and there is a gap between adjacent screening rollers 21. One end of the conveying conveyor belt 2 is the discharging end, and the other end is the discharging end. The conveying conveyor belt 2 moves the material from the discharging end to the discharging end. When the size of the material is smaller than the gap of the screening roller 21, it will fall from the gap of the screening roller 21. When the gap of the screening roller 21 is different, different sizes of materials will be screened out. The rack 1 is provided with an adjusting device 4 capable of adjusting the gap of the screening roller 21. By adjusting the gap of the screening roller 21 through the adjusting device 4, the gap can be set from small to large, and the material can be screened out from small to large. The rack 1 is provided with a plurality of collecting devices for collecting materials. Different sizes of materials are collected by a plurality of collecting devices, and the screening of materials is realized. By using the adjusting device 4, the gap between the screening rollers 21 moved to a certain place is adjusted, and when the conveying conveyor belt 2 moves to this place, the material smaller than this size can fall. Then, according to the range of the required material, the screening roller 21 can be adjusted, which can be suitable for different size selection of different materials, without manual adjustment, without replacing the equipment or the screening roller 21, and the applicability of the equipment is increased. The rack 1 is also provided with a plurality of collecting devices. The collecting device can collect different diameters of materials falling from the gap of the screening roller 21. In this embodiment, the collecting device is a discharging conveyor belt 3, and the discharging conveyor belt 3 is arranged in the front and back directions in the middle of the conveying conveyor belt 2. Different sizes of materials are transported out through the discharging conveyor belt 3, which is convenient for subsequent collection.

[0022] As Figures 1-3As shown, the conveying belt 2 comprises screening rollers 21 arranged in front of and behind each other, and chains arranged at the front and back ends of the screening rollers 21. The conveying belt 2 has an inlet end and an outlet end. The chains are provided with track plates 22, and the track plates 22 are provided with guide holes 23. The front and back ends of the screening rollers 21 are provided with sliding rods 24 which can extend into the guide holes 23. The guide holes 23 are U-shaped holes with a height greater than a width, and the left and right widths of the guide holes 23 are less than the diameters of the screening rollers 21. The sliding rods 24 can slide up and down along the guide holes 23. Each chain is engaged with a sprocket, and the sprockets are divided into driving sprockets and driven sprockets. The driving sprockets engaged with the front and back chains are parallel to each other and are fixed to a driving shaft, and the driven sprockets engaged with the front and back chains are parallel to each other and are fixed to a driven shaft. The driving device drives the driving shaft to rotate, and then drives the chains to rotate. The chains drive the screening rollers 21 to rotate through the track plates 22. When the materials fall on the screening rollers 21, the materials are moved by the conveying belt 2 and are brought to the adjusting devices 4, so as to realize the screening of the materials. The height of the screening rollers 21 is adjusted by the adjusting devices 4. When there is a height difference between adjacent screening rollers 21, the distance between the adjacent screening rollers 21 remains unchanged, and the distance between the adjacent screening rollers 21 increases after the height is changed, so that materials with a larger diameter can be screened. When the height difference between the adjacent screening rollers 21 is greater, the distance between the adjacent screening rollers 21 is greater, and then the diameter of the falling materials can be controlled by controlling the height of the adjacent screening rollers 21, so as to achieve the purpose of screening.

[0023] As Figures 1-7As shown, the adjusting device 4 comprises a base 41 mounted on the frame 1, the base 41 being a vertical plate mounted below the sliding rod 24 of the screening roller 21. The base 41 is located outside the track plate 22. The left and right sides of the upper part of the base 41 are respectively provided with a first supporting block 42 and a second supporting block 43. The first supporting block 42 is fixedly connected with the base 41, and the second supporting block 43 is hingedly connected with the base 41. The upper end surface of the first supporting block 42 is obliquely arranged, and gradually increases from the end away from the base 41 to the base 41, and is connected with the upper end surface of the base 41. The second supporting block 43 is hingedly connected with the base 41, and can rotate along the connecting shaft. The second supporting block 43 is provided below with a moving device capable of driving the second supporting block 43 to rotate. The second supporting block 43 changes the angle of the upper end surface of the second supporting block 43 after rotating, and the upper end surface of the second supporting block 43 is connected with the upper end surface of the base 41. The upper surface of the base 41 is higher than the lower side of the guide hole 23 of the track plate 22 and lower than the uppermost end of the guide hole 23. The distance between the upper surface of the base 41 and the highest point of the guide hole 23 is greater than the diameter of the sliding rod 24 of one screening roller 21. When the conveying belt 2 is transported, the sliding rod 24 of the screening roller 21 located at the upper part of the conveying belt 2 slides along the upper surface, thereby changing the relative height between adjacent screening rollers 21. The thickness of the second supporting block 43 is greater than the thickness of the first supporting block 42, which increases the stability of the second supporting block 43 and avoids the second supporting block 43 from being broken when it is stressed and supported, thereby ensuring the adjusting effect. In this embodiment, the second supporting block 43 is close to the inlet end of the conveying belt 2, and the first supporting block 42 is away from the inlet end of the conveying belt 2. When the conveying belt 2 drives the screening roller 21 to pass through the adjusting device 4, the sliding rod 24 slides upward in the guide hole 23 along the obliquely arranged upper surface of the second supporting block 43 until the upper end surface of the base 41, and then gradually falls along the upper surface of the first supporting block 42 until the sliding rod 24 falls to the bottom of the guide hole 23. When sliding, adjacent screening rollers 21 form a height difference, and the greater the rotation angle of the second supporting block 43, the smaller the height difference, and the greater the height difference when the second supporting block 43 is at the bottom. Therefore, by changing the angle of the second supporting block 43, the adjustment of the adjacent gap of the screening roller 21 is realized. The first supporting block 42 buffers the falling screening roller 21, so that the screening roller 21 falls slowly and avoids damage to the material and the screening roller 21. In other embodiments, the first supporting block 42 can be located close to the inlet end of the conveying belt 2, and the second supporting block 43 can be located away from the inlet end of the conveying belt 2. At this time, the first supporting block 42 stably moves the screening roller 21 upward until the screening roller 21 falls through the gap of the second supporting block 43 when the screening roller 21 is located at the second supporting block 43, thereby increasing the stability.

[0024] As Figures 1-7As shown, the moving device comprises a vertically arranged screw rod 51 and a nut 52 rotating with the screw rod 51, the nut 52 is fixedly connected with a moving block 53, the moving block 53 extends into the lower side of the second supporting block 43 and is in contact with the lower end face of the second supporting block 43. Through the rotation of the screw rod 51 and the up-down movement of the nut 52, the nut 52 drives the moving block 53 to move up and down, and in turn drives the second supporting block 43 to rotate along the shaft, and in turn changes the gap of the screening roller 21. The screw rod 51 is fixedly connected with an adjusting rod capable of driving the screw rod to rotate, a first gear is sleeved on the adjusting rod, a chain is sleeved on the first gears of the adjusting rods of the two moving devices opposite to each other, the moving devices corresponding to each other on both ends of the screening roller 21 are corresponding to each other, the screw rods of the corresponding moving devices are each sleeved with a first gear, and the two corresponding first gears are sleeved with a rack. When one side of the screw rod 51 rotates, the first gear drives the screw rod 51 on the other side to rotate, so that the adjustment heights of the two second supporting blocks 43 are consistent, and in turn the heights of the screening roller 21 before and after passing through the adjusting device 4 are consistent, so that the stability of the screening roller 21 is ensured. By rotating the screw rod 51, the nut 52 can be adjusted, and in turn the rotation angle of the second supporting block 43 of the adjusting device 4 is adjusted, and in turn the gap between the screening rollers 21 is changed. When the screening roller 21 drives the material to pass through the adjusting device 4, the material smaller than the gap of the material falls from the gap, and the screening of the material is completed. In the utility model, an observation port is arranged on the rack 1, which is used for observing the height of the nut 52, and in turn the gap of the screening roller 21 is accurately adjusted, and the accuracy of screening is ensured.

[0025] As Figures 1-2 As shown, a plurality of discharging conveyors 3 are arranged on the rack 1, and the discharging conveyors 3 are arranged in front and back. The side of the discharging port of the screening machine is provided with a discharging conveyor 3, and when the gap of the material is smaller than the minimum gap of the screening roller 21, the material falls from the gap and falls on the discharging conveyor 3 of the discharging port. The lower side of the adjusting device 4 is provided with a discharging conveyor 3, and in the utility model, the gaps of the screening rollers 21 are adjusted to be consistent through the two groups of adjusting devices 4. The material is screened twice to avoid missing screening. The two adjusting devices 4 with consistent adjusting gaps are close to each other and share one discharging conveyor 3. A guide groove is arranged on the lower side of the rack 1, the guide groove is inclined and arranged towards the discharging conveyor 3, and all the falling materials are concentrated on the corresponding discharging conveyor 3. Different discharging conveyors 3 are used to divide materials of different sizes. The discharging end of the conveying conveyor 2 is also provided with a discharging conveyor 3, and the screened material falls on the discharging conveyor 3 of the discharging end and is conveyed by the discharging conveyor 3, so that the screening of the material of different sizes is completed. A universal wheel is arranged at the lower end of the rack 1, and the universal wheel can be used to conveniently move the screening machine to realize screening.

Claims

1. An adjustable screening machine, comprising a frame (1), characterized in that: The frame (1) is provided with a transversely arranged conveyor belt (2), and the conveyor belt (2) is provided with multiple screening rollers (21). The screening rollers (21) rotate with the conveyor belt (2). There are gaps between the parallel and adjacent screening rollers (21). The frame (1) is provided with multiple adjustment devices (4) that can adjust the gaps between the screening rollers (21). The lower side of the conveyor belt (2) is provided with multiple collection devices that can collect materials falling from the gaps between the screening rollers (21).

2. The adjustable screening machine as described in claim 1, characterized in that: The collecting device is a feeding conveyor belt (3), the feeding conveyor belt (3) is positioned corresponding to the adjusting device (4), and the feeding conveyor belt (3) is arranged longitudinally.

3. The adjustable screening machine as described in claim 1, characterized in that: The conveyor belt (2) has chains at both ends of the screening roller (21), and track plates (22) are provided on the inner side of the two chains. The track plates (22) are provided with guide holes (23). The screening roller (21) has sliding rods (24) at both ends that can extend into the guide holes (23) and slide up and down along the guide holes (23). The diameter of the screening roller (21) is larger than the diameter of the sliding rods (24). The conveyor belt (2) has two symmetrically arranged drive wheels at one end and two symmetrically arranged driven wheels at the other end. The two drive wheels are respectively connected to the chains and the two drive wheels are fixedly connected to each other by a shaft. The two driven wheels are respectively engaged with the two chains and the two driven wheels are fixedly connected to each other by a shaft.

4. The adjustable screening machine as described in claim 3, characterized in that: The adjustment device (4) includes a base (41) mounted on the frame (1). The base (41) is located outside the track plate (22) and below the sliding rod (24). A first support block (42) is fixed to one side of the upper end of the base (41), and a rotatable second support block (43) is hinged to the other side of the upper end of the base (41). The first support block (42) is located on the feed inlet side of the conveyor belt (2). The upper surface of the first support block (42) is inclined. The upper end face of the adjustment device (4) gradually increases in height from far to near. The upper end face of the adjustment device (4) is higher than the lower end face of the guide hole (23) and lower than the upper end face of the guide hole (23). The distance between the upper end face of the adjustment device (4) and the lower end face of the guide hole (23) is not less than the diameter of the sliding rod (24). The second support block (43) is located below the sliding rod (24) and can drive the sliding rod (24) to move in the guide hole (23). The second support block (43) is provided with a moving device that can drive the second support block (43) to rotate along the axis.

5. The adjustable screening machine as described in claim 4, characterized in that: The thickness of the second support block (43) is greater than the thickness of the first support block (42).

6. The adjustable screening machine as described in claim 5, characterized in that: The moving device includes a vertically arranged lead screw (51) and a nut (52) that rotates with the lead screw (51). The nut (52) is fixedly connected to a moving block (53), which extends into the lower side of the second support block (43) and contacts the lower end face of the second support block (43).

7. The adjustable screening machine as described in claim 6, characterized in that: The lead screw (51) is provided with an adjusting rod that can drive the lead screw to rotate. The adjusting rod is fitted with a first gear, and the first gear of the adjusting rod of the two moving devices that are opposite each other is fitted with a chain.

8. The adjustable screening machine as described in claim 1, characterized in that: The frame (1) is provided with a guide groove, which is located below the adjustment device (4), and the lower end of the guide groove is inclined toward the feeding conveyor belt (3).

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