A screw conveyor with material cleaning function

Abstract

This utility model discloses a screw conveyor with material cleaning function in the field of conveying equipment. It includes an auger shell, an auger shaft, and a drive motor. An impurity collection box is located below the middle section of the auger shell. A perforated structure is provided on the bottom surface of the auger shell within the impurity collection box, and a screen is provided outside the perforated structure. Flexible pushing brushes are provided on the edges of the auger blades of the auger shaft, and the edges of the flexible pushing brushes abut against the inner wall of the auger shell. This utility model, by providing a perforated structure, screen, and impurity collection box on the bottom surface of the middle section of the auger shell, allows for the separation of material from small particles, broken particles, dust, gravel, and other impurities when material passes through the perforated area, based on the size difference between particles. Furthermore, by providing flexible pushing brushes on the edges of the auger blades, the gap between the auger blades and the auger shell can be eliminated, preventing material breakage caused by compression between the two, and simultaneously assisting in the cleaning of impurities.

Description

Technical Field

[0001] This utility model relates to the field of conveying equipment, and in particular to a screw conveyor with material cleaning function. Background Technology

[0002] Screw conveyors, also known as auger conveyors, are devices that use rotating helical blades to move and transport materials. They are widely used in various industries and are suitable for horizontal or inclined conveying of powdery, granular, and small lump materials. Since screw conveyors primarily rely on the rotation of the auger shaft to transport materials, and the auger blades surrounding the shaft are usually made of metal, a certain gap is left between the auger blades and the auger shell to account for manufacturing and assembly errors and to prevent scratching and wear between the blades and the inner wall of the auger shell. During the conveying process, some materials (such as soybeans) inevitably get squeezed into the gap between the auger blades and the auger shell, causing material breakage. Furthermore, when the gap is less than 2-3 times the average particle size of the material, hard materials (such as ore fragments) can get directly stuck between the blades and the shell. In this case, high-frequency impacts occur between the blade edges and the material, and between the material and the shell, producing a metallic knocking sound and causing equipment wear.

[0003] Furthermore, most existing screw conveyors lack material cleaning capabilities. During grain loading and conveying, multiple conveying devices are typically connected in series to transport materials. Usually, one or more dedicated cleaning devices are added in the middle to remove impurities. If the cleaning process can be distributed among the various conveying devices, the number of devices and the length of the production line can be reduced while ensuring the cleaning effect. Utility Model Content

[0004] To overcome the shortcomings of existing screw conveyors, such as easy material jamming and inability to simultaneously clean impurities, the technical problem to be solved by this utility model is to provide a screw conveyor with material cleaning function that can reduce material breakage and simultaneously clean small broken particles, dust, fragments and other impurities.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A screw conveyor with material cleaning function includes a frame and a screw conveying mechanism mounted on the frame. The screw conveying mechanism includes an auger housing, an auger shaft rotatably mounted inside the auger housing, and a drive motor that drives the auger shaft to rotate. An impurity collection box is provided in the lower middle part of the auger housing, and an impurity outlet is provided at the lowest point of the impurity collection box. The bottom surface of the auger housing inside the impurity collection box has a hollow structure, and a screen is closely attached to the outer side of the bottom surface corresponding to the hollow structure. The auger shaft is provided with helical auger blades, and the edges of the auger blades are provided with flexible pushing brushes, the edges of which abut against the inner wall of the auger housing.

[0007] Furthermore, the auger housing has a feed hopper above the tail end and a discharge port below the head end, and the drive motor is located above the head end of the auger housing.

[0008] Furthermore, the hollow structure consists of multiple openings spaced apart along the axial direction of the auger shell.

[0009] Furthermore, the auger housing has a hinge on one side and a connecting beam on the other side. One side of the impurity collection box is connected to the hinge, and the other side is connected to the connecting beam via a quick-release buckle.

[0010] Furthermore, the quick-release buckle includes a connecting bolt and a clamping plate. The upper end of the connecting bolt is hinged to the connecting beam, and the clamping plate is located on the outer wall of the impurity collection box. When the connecting bolt rotates around its upper end, its lower end can enter the clamping groove of the clamping plate, and the connecting beam and the clamping plate can be tightened and fixed together by a nut.

[0011] Furthermore, multiple support blocks are spaced apart on the inner walls at both ends of the impurity collection box, and the screen is pressed and fixed to the auger shell by the support blocks. The screen has flanges at both ends that abut against the ends of the impurity collection box.

[0012] Furthermore, the flexible pusher brush has multiple connecting plates spaced apart on its inner side. The connecting plates have strip-shaped holes, the length of which is consistent with the radial direction of the auger shaft. The flexible pusher brush is fixed to the auger blade by fastening bolts passing through the strip-shaped holes.

[0013] Furthermore, the flexible pushing brush is a densely arranged filamentous nylon brush, steel brush, or copper brush.

[0014] Furthermore, the frame includes a support frame, a first movable frame, a second movable frame, and a tail frame. The support frame is fixed below the middle to the head of the auger housing, and a slide rail is provided at the bottom of the support frame. One end of the first movable frame is hinged to the position between the middle and the tail of the auger housing, and the other end is hinged to the tail end of the second movable frame, with a roller provided at the hinge point. The head end of the second movable frame is slidably connected to the slide rail via a guide wheel. The support frame is provided with an adjustment mechanism that drives the guide wheel to slide along the slide rail. The tail frame is located below the tail of the auger housing, and a universal wheel is provided at the bottom of the tail frame.

[0015] Furthermore, the adjustment mechanism includes a wire drum located at the tail of the support frame and an adjustment motor that drives the wire drum to rotate. The tail of the support frame is provided with a support plate, and a fixed pulley is provided on the support plate. The head end of the second movable frame is provided with a support shaft, and a movable pulley is provided on the support shaft. The end of the wire rope on the wire drum is fixed to the support plate, and the middle part is wound between the fixed pulley and the movable pulley.

[0016] The beneficial effects of this utility model are as follows: by setting the bottom surface of the middle section of the auger shell as a hollow structure, and setting a screen and impurity collection box in the hollow structure, when the material passes through the hollow area, the material can be separated from small particles, dust, gravel and other impurities by the size difference between the particles; in addition, by setting a flexible pushing brush on the edge of the auger blades, the gap between the auger blades and the auger shell can be eliminated, avoiding material breakage, and can drive the material and impurities to move synchronously, so that small particles, dust, gravel and other impurities sink evenly to the bottom of the material, achieving a better separation effect when passing through the hollow area. Attached Figure Description

[0017] Figure 1 This is the front view of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 3 yes Figure 2 Enlarged view of section A;

[0020] Figure 4 yes Figure 2 Enlarged view of section B;

[0021] Figure 5 This is a cross-sectional view of the present invention;

[0022] Figure 6 This is a schematic diagram of the auger blade of this utility model;

[0023] Figure 7 This is a schematic diagram of the angle adjustment mechanism of this utility model.

[0024] The diagram is labeled as follows: 1- Frame, 2- Screw conveyor mechanism, 3- Impurity collection box, 4- Screen, 5- Flexible pusher brush, 6- Adjusting motor, 7- Wire drum, 8- Wire rope, 11- First movable frame, 12- Second movable frame, 13- Support frame, 14- Tail frame, 15- Roller, 21- Screwdriver housing, 22- Screwdriver shaft, 23- Drive motor, 24- Screwdriver blades, 25- Feed hopper, 26- Discharge port, 27- Hinge, 28- Connecting beam, 29- Connecting bolt, 31- Impurity outlet, 32- Clamping plate, 33- Clamping slot, 34- Nut, 35- Support block, 41- Flanged edge, 51- Connecting plate, 52- Strip hole, 53- Fastening bolt, 121- Guide wheel, 122- Support shaft, 123- movable pulley, 131- slide rail, 132- support plate, 133- fixed pulley, 134- limit plate, 141- universal wheel, 211- opening. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] It should be noted that if this utility model contains directional indicators such as up, down, left, right, front, and back, these terms are used to describe the relative positional relationships between components and are not specific references to the absolute positions of the components or the relationships between them. They are only used to explain the relative positional relationships and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly. If this utility model contains terms related to quantity such as "many," "multiple," or "several," these terms specifically refer to two or more.

[0027] like Figure 1-6 As shown, the present invention provides a screw conveyor with material cleaning function, including a frame 1 and a screw conveying mechanism 2 mounted on the frame 1. The screw conveying mechanism 2 includes an auger housing 21, an auger shaft 22 rotatably mounted inside the auger housing 21, and a drive motor 23 that drives the auger shaft 22 to rotate. A feed hopper 25 is provided above the tail end of the auger housing 21, and a discharge port 26 is provided below the head end. The drive motor 23 is located above the head end of the auger housing 21. An impurity collection box 3 is provided below the middle part of the auger housing 21, and an impurity outlet 31 is provided at the lowest point of the impurity collection box 3. The bottom surface of the auger housing 21 inside the impurity collection box 3 has a hollow structure, and a screen 4 is closely attached to the corresponding part of the hollow structure on the outer side of the bottom surface. The auger shaft 22 is provided with helical auger blades 24, and the edges of the auger blades 24 are provided with flexible pushing brushes 5, the edges of which abut against the inner wall of the auger housing 21.

[0028] This invention utilizes a flexible pushing brush 5 along the edge of the auger blades 24. The steel-structured auger blades 24 push most of the material, while the flexible pushing brush 5 eliminates the gap between the auger blades 24 and the auger housing 21, and pushes a small portion of the material. This ensures efficient conveying while preventing material breakage and collision wear between the auger blades 24 and the auger housing 21. Furthermore, the flexible pushing brush 5 also moves dust, gravel, and other impurities synchronously with the material, preventing impurities from accumulating inside the auger housing 21 and affecting conveying efficiency. Additionally, by creating a hollow structure on the bottom center of the auger housing 21, and installing a screen 4 and an impurity collection box 3 within this hollow structure, material passing through the hollow area can be separated from small particles, dust, gravel, and other impurities due to differences in particle size. The impurity collection box 3 is sealed to the auger housing 21, collecting impurities within it before discharging them from the impurity outlet 31, thus preventing dust contamination. The reason for setting the screen 4 in the middle of the auger shell 21 is to allow small particles, broken particles, dust, gravel and other impurities to sink evenly to the bottom of the material during the conveying and tumbling process in the first half, so as to achieve a better separation effect when passing through the hollow area.

[0029] As a preferred option, such as Figure 3 As shown, the hollow structure consists of multiple openings 211 spaced apart along the axis of the auger housing 21. Although the screen 4 itself is also made of steel plate, its supporting strength is not high because it is not directly fixed to the auger housing 21. The structure of multiple openings 211 spaced apart ensures that impurities fall off at the openings 211 while preventing excessive material accumulation on the screen 4, which could cause deformation. To ensure screening efficiency, the openings 211 can extend through the lower half of the auger housing 21.

[0030] For the flexible pushing brush 5, densely arranged filamentous nylon brushes, steel brushes, or copper brushes are preferred. This ensures flexible contact with the auger housing 21, reducing wear, and also provides support to move materials and impurities. Furthermore, due to manufacturing and assembly errors, the gaps between the auger blades 2 and the auger housing 21 may vary. Therefore, to adjust the installation position of the flexible pushing brush 5, multiple connecting plates 51 are spaced apart on the inner side of the flexible pushing brush 5, such as... Figure 5 , Figure 6 As shown, the connecting plate 51 has a strip-shaped hole 52, the length direction of which is consistent with the radial direction of the auger shaft 22. The flexible pusher brush 5 is fixed to the auger blade 24 by fastening bolts 53 passing through the strip-shaped hole 52. During installation, the position of the connecting plate 51 can be adjusted according to the gap between the auger blade 2 and the auger housing 21 to ensure that the edge of the flexible pusher brush 5 contacts the inner wall of the auger housing 21.

[0031] During the conveying and screening process, some impurities or materials inevitably get stuck in the screen holes of the screen 4. Therefore, in order to clean the screen 4, the impurity collection box 3 needs to be designed as a detachable structure. The solution adopted by this utility model is as follows: Figure 3 , Figure 5 As shown, a hinge 27 is provided on one side of the auger housing 21, and a connecting beam 28 is provided on the other side. One side of the impurity collection box 3 is connected to the hinge 27, and the other side is connected to the connecting beam 28 via a quick-release buckle. Multiple hinges 27 and quick-release buckles should be included and spaced apart along the length of the impurity collection box 3 to ensure reliable connection. When it is necessary to open the impurity collection box 3, simply loosen the quick-release buckle on one side and then rotate the impurity collection box 3 downwards around the hinge 27 on the other side. The screen 4 can then be cleaned quickly and easily.

[0032] Specifically, such as Figure 3 , Figure 5 As shown, the quick-release buckle includes a connecting bolt 29 and a retaining plate 32. The upper end of the connecting bolt 29 is hinged to the connecting beam 28. The retaining plate 32 is located on the outer wall of the impurity collection box 3. When the connecting bolt 29 rotates around its upper end, its lower end can enter the retaining groove 33 of the retaining plate 32, and the connecting beam 28 and the retaining plate 32 can be tightened and fixed together by the nut 34. This can prevent the connecting bolt 29 from being lost and improve the efficiency of assembly and disassembly.

[0033] Regarding the installation method of screen 4, the preferred embodiment of this utility model is as follows: Figure 3 , Figure 5 As shown, multiple support blocks 35 are spaced apart on the inner walls of both ends of the impurity collection box 3. The screen 4 is pressed and fixed to the auger housing 21 by the support blocks 35. Both ends of the screen 4 have flanges 41 that abut against the ends of the impurity collection box 3. The inner side of the support blocks 35 has an arc-shaped structure that matches the screen 4, providing stable support and compression for the screen 4. The flanges 41 are used for positioning the screen 4 and the impurity collection box 3 in the length direction.

[0034] To accommodate conveying needs at different heights, this application also includes an angle adjustment mechanism, such as... Figure 2 , Figure 4 and Figure 7As shown, the frame 1 includes a support frame 13, a first movable frame 11, a second movable frame 12, and a tail frame 14. The support frame 13 is fixed below the middle to the head of the auger housing 21. A slide rail 131 is provided at the bottom of the support frame 13. One end of the first movable frame 11 is hinged to the position between the middle and the tail of the auger housing 21, and the other end is hinged to the tail end of the second movable frame 12. A roller 15 is provided at the hinge point. The head end of the second movable frame 12 is slidably connected to the slide rail 131 via a guide wheel 121. The support frame 13 is provided with an adjustment mechanism that drives the guide wheel 121 to slide along the slide rail 131. The tail frame 14 is located below the tail of the auger housing 21, and a universal wheel 141 is provided at the bottom of the tail frame 14. Two slide rails 131 are provided, respectively located on both sides of the bottom of the support frame 13. Two guide wheels 121 are also provided, respectively supported below the two slide rails 131, ensuring the stability of the support.

[0035] Furthermore, the adjustment mechanism includes a wire drum 7 located at the tail of the support frame 13 and an adjustment motor 6 that drives the wire drum 7 to rotate. The tail of the support frame 13 is provided with a support plate 132, on which a fixed pulley 133 is mounted. The head end of the second movable frame 12 is provided with a support shaft 122, on which a movable pulley 123 is mounted. The guide wheel 121 is also preferably mounted on the support shaft 122. The end of the wire rope 8 on the wire drum 7 is fixed to the support plate 132, and the middle portion is wound between the fixed pulley 133 and the movable pulley 123. To improve the connection strength between the support plate 132 and the support shaft 122, both the fixed pulley 133 and the movable pulley 123 should include at least two sets to increase the number of strands of wire rope 8 wound between them.

[0036] The adjustment process of this angle adjustment mechanism is as follows: Figure 1 , Figure 2 As shown, when the screw conveyor needs to be raised, the adjusting motor 6 drives the wire drum 7 to rotate, and the wire drum 7 winds the wire rope 8, causing the support shaft 122 to move towards the support plate 132. This causes the guide wheel 121 to move along the slide rail 131 towards the tail of the support frame 13, causing the second movable frame 12 to rotate upwards around the axis of the roller 15, thereby increasing the tilt angle of the screw conveyor. When the tilt angle of the screw conveyor needs to be lowered, simply reverse the rotation of the adjusting motor 6. Under the gravity of the screw conveyor, the guide wheel 121 will move along the slide rail 131 towards the head of the support frame 13, causing the second movable frame 12 to rotate downwards around the axis of the roller 15, thereby lowering the tilt angle of the screw conveyor. To prevent the guide wheel 121 from disengaging from the slide rail 131, a limiting plate 134 is provided at the head of the slide rail 131.

Claims

1. A screw conveyor with material cleaning function, comprising a frame (1) and a screw conveying mechanism (2) disposed on the frame (1), wherein the screw conveying mechanism (2) comprises an auger housing (21), an auger shaft (22) rotatably disposed within the auger housing (21), and a drive motor (23) for driving the auger shaft (22) to rotate, characterized in that: The auger housing (21) has an impurity collection box (3) below the middle section, and an impurity outlet (31) is provided at the lowest point of the impurity collection box (3). The bottom surface of the auger housing (21) inside the impurity collection box (3) has a hollow structure, and a screen (4) is closely attached to the corresponding part of the hollow structure on the outside of the bottom surface. The auger shaft (22) has a spiral structure auger blade (24), and the edge of the auger blade (24) is provided with a flexible pusher brush (5). The edge of the flexible pusher brush (5) abuts against the inner wall of the auger housing (21).

2. The screw conveyor with material cleaning function as described in claim 1, characterized in that: The screw conveyor housing (21) has a feed hopper (25) above the tail and a discharge port (26) below the head. The drive motor (23) is located above the head of the screw conveyor housing (21).

3. A screw conveyor with material cleaning function as described in claim 1, characterized in that: The hollow structure consists of multiple openings (211) spaced apart along the axis of the auger shell (21).

4. A screw conveyor with material cleaning function as described in claim 1, characterized in that: The auger housing (21) has a hinge (27) on one side and a connecting beam (28) on the other side. One side of the impurity collection box (3) is connected to the hinge (27), and the other side is connected to the connecting beam (28) through a quick-release buckle.

5. A screw conveyor with material cleaning function as described in claim 4, characterized in that: The quick-release buckle includes a connecting bolt (29) and a clamping plate (32). The upper end of the connecting bolt (29) is hinged to the connecting beam (28). The clamping plate (32) is located on the outer wall of the impurity collection box (3). When the connecting bolt (29) rotates around its upper end, its lower end can enter the clamping groove (33) of the clamping plate (32) and can tighten and fix the connecting beam (28) and the clamping plate (32) together by means of a nut (34).

6. A screw conveyor with material cleaning function as described in claim 5, characterized in that: Multiple support blocks (35) are spaced apart on the inner walls at both ends of the impurity collection box (3). The screen (4) is pressed and fixed on the auger shell (21) by the support blocks (35). The screen (4) has flanges (41) at both ends that abut against the ends of the impurity collection box (3).

7. A screw conveyor with material cleaning function as described in claim 1, characterized in that: The flexible pusher brush (5) has multiple connecting plates (51) spaced apart on its inner side. The connecting plates (51) have strip holes (52). The length direction of the strip holes (52) is consistent with the radial direction of the auger shaft (22). The flexible pusher brush (5) is fixed to the auger blade (24) by fastening bolts (53) passing through the strip holes (52).

8. A screw conveyor with material cleaning function as described in claim 7, characterized in that: The flexible pusher brush (5) is a densely arranged filamentous nylon brush, steel brush or copper brush.

9. A screw conveyor with material cleaning function as described in any one of claims 1-8, characterized in that: The frame (1) includes a support frame (13), a first movable frame (11), a second movable frame (12), and a tail frame (14). The support frame (13) is fixed below the middle to the head of the auger housing (21). The bottom of the support frame (13) is provided with a slide rail (131). One end of the first movable frame (11) is hinged to the position between the middle and the tail of the auger housing (21), and the other end is hinged to the tail end of the second movable frame (12). A roller (15) is provided at the hinge. The head end of the second movable frame (12) is slidably connected to the slide rail (131) through a guide wheel (121). The support frame (13) is provided with an adjustment mechanism that can drive the guide wheel (121) to slide along the slide rail (131). The tail frame (14) is located below the tail of the auger housing (21). The bottom of the tail frame (14) is provided with a universal wheel (141).

10. A screw conveyor with material cleaning function as described in claim 9, characterized in that: The adjustment mechanism includes a wire drum (7) located at the tail of the support frame (13) and an adjustment motor (6) that drives the wire drum (7) to rotate. The tail of the support frame (13) is provided with a support plate (132), and a fixed pulley (133) is provided on the support plate (132). The head end of the second movable frame (12) is provided with a support shaft (122), and a movable pulley (123) is provided on the support shaft (122). The end of the wire rope (8) on the wire drum (7) is fixed on the support plate (132), and the middle part is wound between the fixed pulley (133) and the movable pulley (123).

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