Self-cleaning shaftless roller screening device
By installing cleaning rollers and elastic paddles on the hollow screen cylinder, the problem of easy clogging of the screen holes in the shaftless drum screening device is solved, achieving efficient screening and low energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2026-03-24
AI Technical Summary
Existing shaftless drum screening devices are prone to clogging when screening materials with high moisture content or high viscosity, and cleaning is difficult, resulting in decreased screening efficiency and accuracy, and increased energy consumption.
Cleaning rollers and elastic paddles are installed on the hollow screen cylinder. The rotation of the cleaning rollers and the tapping of the elastic paddles remove the blockage in the screen holes and keep the screen holes unobstructed.
It effectively reduces screen clogging, improves screening efficiency and accuracy, reduces energy consumption, and reduces resource waste.
Smart Images
Figure CN224025605U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of screening machines, especially to a self-cleaning shaftless drum screening device. BACKGROUND
[0002] As a kind of efficient, continuous material grading equipment, shaftless drum screening device is widely used in mining, metallurgy, building materials and environmental protection industries, for the particle size classification of granular materials (such as ore, sand, recycled aggregate, etc.). Its core structure is composed of screen drum, driving system and rack, through the rotary motion of drum, the material is tumbled and dispersed in the screen drum, fine particles fall into the lower collecting device through the screen hole, coarse particles move along the axial direction of the screen drum to the discharge end, so as to realize the classification purpose. Compared with traditional shaft drum screen, shaftless drum screen has the advantages of simplified structure, low maintenance cost and high material passing rate due to the cancellation of central shaft.
[0003] However, the existing shaftless drum screen has the problem of screen hole blockage in actual application. Firstly, when dealing with materials with high moisture content and high viscosity (such as sludge, wet sand), fine particles are easy to adhere to the inner wall of screen hole, gradually forming a blocking layer, resulting in a decrease in effective screening area; secondly, for materials containing fibers or flexible impurities (such as plastic and wood chips in construction waste), impurities are easy to wrap around the edge of screen hole, hindering the passage of particles.
[0004] Both of the above reasons will cause the blockage of screen hole. On the one hand, the blockage of screen hole will lead to a decrease in screen permeability, and some qualified fine particles will be forced to be discharged with coarse materials, resulting in resource waste (waste rate increases by 5%-15%); on the other hand, the blockage of screen hole will increase the load of screen drum, and the driving energy consumption will increase (about 10%-20% increase), and the prolonged material residence time may cause equipment overheating or accelerated wear. UTILITY MODEL CONTENTS
[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a self-cleaning shaftless drum screening device, which effectively solves the problem of easy blockage of its own screen hole during screening work, and the difficulty of dynamic cleaning of the screen hole, thereby reducing the screening efficiency and accuracy of the device.
[0006] To achieve the above purpose, the utility model provides the following technical scheme: the utility model discloses a rack, the rack is rotatably connected with a hollow screen drum, one side of the hollow screen drum is provided with a feeding port, the feeding port is matched with a hopper, the hopper is fixedly connected with the rack, a fixed frame is fixedly connected on the rack at the side of the hopper, a cleaning roller for cleaning the hollow screen drum is rotatably connected on the fixed frame, a collecting plate is fixedly connected on the inner side of the rack, a collecting groove matched with the hollow screen drum is arranged in the collecting plate, a first conveying belt is arranged on the rack below the collecting plate, and the other side of the hollow screen drum is provided with a discharge port.
[0007] Preferably, the fixed frame comprises a front support and a rear support, the front support is rotatably connected with a first rotating shaft, the first rotating shaft is fixedly connected with an elastic tab, the elastic tab is located above the hollow screen cylinder, the rear support is rotatably connected with a second rotating shaft, and the second rotating shaft is fixedly connected with the cleaning roller.
[0008] Preferably, the hollow screen cylinder is placed obliquely with the rack, the horizontal height of the feeding port is higher than that of the discharging port, a friction wheel is fixedly connected to the hollow screen cylinder, and a driving wheel is matched with the outer side of the friction wheel, and the driving wheel is rotatably connected with the rack.
[0009] Preferably, a discharging plate is matched with the discharging port, support rods are fixedly connected to the two sides of the discharging plate, and the support rods are fixedly connected with the rack.
[0010] Preferably, the hopper is in a funnel structure, a hopper support is fixedly connected below the hopper, the hopper support is fixedly connected with the rack, a second conveying belt is arranged below the hopper, and the other end of the second conveying belt extends into the hollow screen cylinder.
[0011] Preferably, a plurality of groups of ribs are fixedly connected inside the hollow screen cylinder, and the plurality of groups of ribs are staggered with the screen holes of the hollow screen cylinder.
[0012] Compared with the prior art, the utility model has the advantages of:
[0013] The utility model discloses a rotating cleaning roller is installed on the hollow screen cylinder, can effectively remove the screen hole block, reduces the frequency of shutdown cleaning, improves the screening efficiency of the hollow screen cylinder, in addition, the elastic tab of the coordination of the opposite side of the cleaning roller is increased, and the smoothness of the screen hole in the hollow screen cylinder is guaranteed through the different cleaning mode of two, and the screen hole block is avoided. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is the whole first axle side structure schematic diagram of the utility model.
[0015] Figure 2 It is the whole second axle side structure schematic diagram of the utility model.
[0016] Figure 3 It is the forward structure schematic diagram of the utility model.
[0017] Figure 4 It is the material receiving plate connecting structure schematic diagram of the utility model.
[0018] Figure 5 It is the hollow screen cylinder connecting structure schematic diagram of the utility model.
[0019] Figure 6The first conveying belt connecting structure schematic view of the utility model.
[0020] The figure mark: 1, frame; 2, hollow screen cylinder; 3, feed inlet; 4, hopper; 5, fixed frame; 501, front support; 502, rear support; 503, first rotating shaft; 504, elastic tab; 6, second rotating shaft; 7, cleaning roller; 8, material collecting plate; 9, material collecting groove; 10, first conveying belt; 11, discharge port; 12, friction wheel; 13, driving wheel; 14, discharging plate; 15, supporting rod; 16, hopper frame; 17, second conveying belt; 18, rib. DETAILED DESCRIPTION
[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0022] Please refer to the drawings of the embodiments of the utility model, Figures 1-6 The self-cleaning shaftless drum screening device of the embodiment comprises a frame 1, the frame 1 is rotationally connected with a hollow screen cylinder 2, one side of the hollow screen cylinder 2 is provided with a feed inlet 3, the feed inlet 3 is matched with a hopper 4, the hopper 4 is fixedly connected with the frame 1, a fixed frame 5 is fixedly connected to the frame 1 at the side of the hopper 4, the fixed frame 5 is rotationally connected with a cleaning roller 7 for cleaning the hollow screen cylinder 2, a material collecting plate 8 is fixedly connected to the inner side of the frame 1, the material collecting plate 8 is provided with a material collecting groove 9 matched with the hollow screen cylinder 2, a first conveying belt 10 is arranged on the frame 1 below the material collecting plate 8, and the other side of the hollow screen cylinder 2 is provided with a discharge port 11.
[0023] The frame 1 is located directly below the hollow screen cylinder 2 and the hopper 4, and provides a stable support structure for the two, the frame 1 can be fixed between the ground through expansion screws, a shock pad is additionally arranged between the bottom and the ground, so as to guarantee the stability of the frame 1, the hollow screen cylinder 2 is a hollow tubular structure, the side wall of the hollow screen cylinder 2 is provided with screen holes, the hollow screen cylinder 2 can rotate on the frame 1, and in the rotating process, fine particles pass through the screen holes and fall into the material collecting groove 9 of the material collecting plate 8 under the action of gravity, the width of the material collecting groove 9 is less than or equal to the width of the first conveying belt 10, so that all the particles in the material collecting groove 9 can enter the first conveying belt 10, and the raw materials are prevented from scattering outward, the hollow screen cylinder 2, the material collecting plate 8 and the first conveying belt 10 are sequentially arranged from top to bottom, so that the screened particles can fall downward under the action of gravity, and no additional power source needs to be provided when the particles are screened and moved, thereby reducing the energy loss.
[0024] The fixed frame 5 is composed of a front support 501 and a rear support 502, the front support 501 is installed on the front side of the rack 1, the rear support 502 is installed on the rear side of the rack 1, the front support 501 and the rear support 502 are symmetrically distributed about the axis of the hollow screen cylinder 2, the first rotating shaft 503 on the front support 501 is a rotary shaft, the rotary shaft can be additionally provided with a torsional spring, under the action of the torsional spring, the elastic push piece 504 has a downward force on the lower hollow screen cylinder 2, so that when the hollow screen cylinder 2 rotates, the elastic push piece 504 will reciprocatingly knock the outer wall of the hollow screen cylinder 2 under the action of the rotary shaft, so as to cause the vibration of the hollow screen cylinder 2, and the clogging in the screen hole is shaken off, so as to achieve the purpose of cleaning the screen hole, further, the second rotating shaft 6 is installed and connected on the rear support 502, the second rotating shaft 6 can additionally increase a driving motor, or the second rotating shaft 6 can be additionally provided with a connecting wheel, the connecting wheel is in frictional contact with the side of the hollow screen cylinder 2, the second rotating shaft 6 is driven to rotate through the motor or the connecting wheel, and the rotating cleaning roller 7 drives the screen hole of the hollow screen cylinder 2 to clean.
[0025] The hollow screen cylinder 2 is rotatably connected with the rack 1 through the annular bearing seat at both ends, realizes shaftless design, avoids the hindrance of the traditional central shaft to the material flow, one side of the hollow screen cylinder 2 is provided with the feeding port 3, and the other side is provided with the discharging port 11, so as to facilitate the screened material to better move from the feeding port 3 to the discharging port 11, the hollow screen cylinder 2 is placed obliquely, the fixed frame 5, the material collecting plate 8 and the first conveying belt 10 corresponding to the hollow screen cylinder 2 are also placed obliquely, and the inclinations of the three are the same as the inclination of the hollow screen cylinder 2, the outer wall of the hollow screen cylinder 2 is fixedly provided with the friction wheel 12, the friction wheel 12 is in contact with the driving wheel 13, each friction wheel 12 is matched with two driving wheels 13, the driving wheel 13 drives the friction wheel 12 to rotate through the speed reducer motor, and then drives the hollow screen cylinder 2 to rotate. The connection structure of the hollow screen cylinder 2 and the driving wheel 13 and the rack 1 is the same as the connection structure of the existing shaftless screen cylinder, which is the prior art.
[0026] The discharging port 11 is provided with a discharging plate 14, the discharging plate 14 is an arc-shaped guide plate, the two sides of the discharging plate 14 are fixed to the rack 1 through the supporting rods 15, and the guide plate guides the large-particle material that does not pass through the screen hole to slide to the external collecting device, the supporting rods 15 and the rack 1 are detachably connected through bolts, so as to facilitate the adjustment of the angle of the discharging plate 14 according to the characteristics of the material
[0027] The hopper 4 is a funnel structure, which is fixed to the upper left of the frame 1 through a hopper frame 16, and the bottom of the hopper 4 is connected to a second conveying belt 17, which is installed on the hopper frame and rotates. The second conveying belt 17 shares a driving motor with a driving wheel through a belt wheel set, so that the number of motors in the device can be reduced. The other pipe opening of the second conveying belt 17 extends to the inside of the hollow screen cylinder 2, so as to ensure that the material directly enters the central area of the screen cylinder. The upper end of the hopper 4 is provided with a chute extending to the two sides and downward, and steel bars are welded at the inlet of the hopper 4. The screen material enters the inlet of the hopper through the gap between the steel bars. Since the steel bars are installed obliquely, the oversized screen material will leave the inlet of the hopper under the action of gravity, so that the feeding of the inlet is not affected.
[0028] A plurality of rib strips 18 are fixed in the hollow screen cylinder 2 in the circumferential direction. The rib strips 18 are staggered with the screen holes, which can not only enhance the structural strength of the hollow screen cylinder 2, but also push and roll the material through rotation, so as to improve the screening efficiency.
[0029] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A self-cleaning shaftless drum screening device, characterized in that: The device includes a frame (1), on which a hollow screen cylinder (2) is rotatably connected. A feed inlet (3) is provided on one side of the hollow screen cylinder (2), and a hopper (4) is fitted at the feed inlet (3). The hopper (4) is fixedly connected to the frame (1). A fixing frame (5) is fixedly connected to the frame (1) on the side of the hopper (4). A cleaning roller (7) for cleaning the hollow screen cylinder (2) is rotatably connected to the fixing frame (5). A receiving plate (8) is fixedly connected to the inside of the frame (1). A receiving trough (9) that cooperates with the hollow screen cylinder (2) is provided inside the receiving plate (8). A first conveyor belt (10) is provided on the frame (1) below the receiving plate (8). A discharge port (11) is provided on the other side of the hollow screen cylinder (2).
2. The self-cleaning shaftless drum screening device according to claim 1, characterized in that: The fixed frame (5) includes a front support (501) and a rear support (502). A first rotating shaft (503) is rotatably connected to the front support (501). An elastic lever (504) is fixedly connected to the first rotating shaft (503). The elastic lever (504) is located above the hollow screen cylinder (2). A second rotating shaft (6) is rotatably connected to the rear support (502). The second rotating shaft (6) is fixedly connected to the cleaning roller (7).
3. The self-cleaning shaftless drum screening device according to claim 1, characterized in that: The hollow screen cylinder (2) is placed at an angle to the frame (1). The horizontal height of the feed inlet (3) is higher than that of the discharge outlet (11). A friction wheel (12) is fixedly connected to the hollow screen cylinder (2). A drive wheel (13) is fitted on the outside of the friction wheel (12). The drive wheel (13) is rotatably connected to the frame (1).
4. The self-cleaning shaftless drum screening device according to claim 1 or 3, characterized in that: The discharge port (11) is fitted with a feeding plate (14), and support rods (15) are fixedly connected to both sides of the feeding plate (14). The support rods (15) are fixedly connected to the frame (1).
5. The self-cleaning shaftless drum screening device according to claim 1, characterized in that: The hopper (4) has a funnel structure. A hopper frame (16) is fixedly connected below the hopper (4). The hopper frame (16) is fixedly connected to the frame (1). A second conveyor belt (17) is provided below the hopper (4). The other end of the second conveyor belt (17) extends into the hollow screen cylinder (2).
6. The self-cleaning shaftless drum screening device according to claim 1, characterized in that: The hollow sieve cylinder (2) has multiple sets of ribs (18) fixedly connected inside, and the multiple sets of ribs (18) are staggered with the sieve holes of the hollow sieve cylinder (2).