A self-cleaning drum structure and a drum thickener containing the same

Abstract

This invention relates to the field of rotary drum thickener technology, specifically to a self-cleaning rotary drum structure and a rotary drum thickener containing this structure. It includes a mounting frame and a rotary drum box mounted on the mounting frame, and a filter cartridge rotatably mounted in the rotary drum box. A multi-functional spiral frame is rotatably mounted in the filter cartridge. The multi-functional spiral frame comprises multiple component blocks, with adjacent component blocks slidably connected. The overall shape of the multi-functional spiral frame can be changed by sliding the component blocks. The overall shape of the multi-functional spiral frame includes a strip shape and a spiral shape. A striking plate is installed between the first rotating ring and the second rotating ring, and the striking plate vibrates up and down when the filter cartridge rotates. The multi-functional spiral frame can freely switch between a spiral shape and a strip shape. During operation, it stably stirs and pushes sludge in a spiral shape, ensuring dewatering and thickening efficiency; during cleaning, it unfolds into a strip shape, eliminating the complex obstruction structure of traditional fixed spiral frames and significantly reducing cleaning difficulty.

Description

Technical Field

[0001] This invention relates to the field of rotary drum thickener technology, specifically to a self-cleaning rotary drum structure and a rotary drum thickener containing the structure. Background Technology

[0002] Rotary drum thickeners are key solid-liquid separation equipment in wastewater treatment and sludge dewatering processes. With their continuous operation, high processing efficiency, and stable operation, they are widely used in municipal sewage, industrial wastewater, and sludge reduction treatment. Their working principle primarily involves separating sludge and water through the rotation of the filter cartridge. Water passes through the filter cartridge and is discharged, while sludge is retained and directionally conveyed by an internal pushing mechanism, completing the thickening and discharge process. It is a core piece of equipment for achieving sludge volume reduction and water purification.

[0003] In actual operation, existing rotary drum thickeners generally have unresolved defects. After the sludge thickening process is completed inside the rotary drum, a large amount of residual sludge will adhere to the inner wall of the filter cartridge, the corners of the box, and the surface of the feeding mechanism. As the moisture content of this sludge gradually decreases, it will dry and harden, forming a solid sludge layer. This not only blocks the filter cartridge pores and significantly reduces the sludge-water separation efficiency, but also aggravates equipment wear and corrosion, shortening the service life of the equipment.

[0004] To ensure stable sludge transport, traditional rotary drum boxes typically have a fixed screw or agitator installed inside as the material pushing component. These structures are mostly integral or welded designs with densely packed blades, complex structures, and narrow gaps between the blades and the drum wall, resulting in numerous cleaning dead zones. During shutdown cleaning, the fixed screw and agitator severely obstruct the operating space, making manual cleaning difficult, time-consuming, and unable to thoroughly remove sludge accumulated in dead zones. If high-pressure washing is used, the complex structure hinders water flow, limiting the cleaning effect. Frequent and inefficient cleaning not only increases labor and maintenance costs but also extends equipment downtime. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a self-cleaning drum structure and a drum concentrator containing the structure, which can effectively solve the problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a self-cleaning drum structure, including a mounting frame and a drum box mounted on the mounting frame, and further comprising: A filter cartridge is rotatably installed in a drum box. A multi-functional spiral frame is rotatably installed in the filter cartridge. The multi-functional spiral frame includes multiple component blocks. Two adjacent component blocks are slidably connected. The overall shape of the multi-functional spiral frame can be changed by sliding the component blocks. The overall shape of the multi-functional spiral frame includes a strip shape and a spiral shape. A first rotating ring is installed at one end of a multifunctional spiral frame, and a second rotating ring is fixedly installed at the other end of the multifunctional spiral frame. A striking plate is installed between the first and second rotating rings, and the striking plate vibrates up and down when the filter cartridge rotates.

[0007] Furthermore, the drum box is provided with a water outlet frame, two of which penetrate the inner wall of the drum box and are connected to a water inlet pipe. Multiple nozzles are provided at equal intervals on the water outlet frame.

[0008] Furthermore, a material collection trough is provided on the top wall of the component block, and when the multifunctional spiral frame is long and narrow, adjacent material collection troughs are aligned.

[0009] Furthermore, the sidewall of the component block is provided with a guide slope, and when the multifunctional spiral frame is spiral in shape, the adjacent guide slopes are aligned.

[0010] Furthermore, the first rotating ring is provided with a discharge trough, and the first rotating ring is provided with a feed inlet that communicates with the discharge trough, and the feed inlet and the collection trough are aligned.

[0011] Furthermore, the second rotating ring is provided with an adjustment groove, which is an open annular shape. One end of the striking plate is slidably installed in the adjustment groove, and the other end of the striking plate is fixedly connected to the first rotating ring.

[0012] Furthermore, a first right-angle plate is fixedly installed on the first rotating ring, and connecting plates are fixedly installed at both ends of the striking plate. An adjusting block is slidably installed in the adjusting groove, and a second right-angle plate is connected to the adjusting block. An elastic rod is connected between the connecting plate and the first right-angle plate and the second right-angle plate. A driving ring is fixedly installed at both ends of the filter cartridge. The two driving rings are rotatably connected to the first rotating ring and the second rotating ring in a one-to-one correspondence. Multiple protrusions are provided at equal intervals on the inner ring of the driving ring.

[0013] Furthermore, a first sliding groove is provided on one side of the component block, and a first slider adapted to the first sliding groove is installed on the other side of the component block. A first airbag and a second airbag are respectively provided in the first sliding groove, and the first slider is located between the first airbag and the second airbag. A connecting tube is connected between the first airbag and the second airbag.

[0014] Furthermore, the mounting bracket is equipped with a first drive motor, and the output end of the first drive motor is equipped with a transmission box.

[0015] Furthermore, the mounting frame is equipped with a mixing tank, and a feed pipe is connected between the mixing tank and the drum box.

[0016] Furthermore, a fixed frame is installed on the mixing tank, and a mixing rack is rotatably mounted on the fixed frame. A second drive motor for driving the mixing rack to rotate is provided on the fixed frame.

[0017] A rotary drum concentrator employs the aforementioned self-cleaning rotary drum structure.

[0018] The technical solution provided by this invention has the following advantages compared with the known prior art: The multi-functional spiral frame can freely switch between spiral and strip shapes. When working, it stably stirs and pushes sludge in a spiral shape to ensure dewatering and concentration efficiency; when cleaning, it unfolds into a strip shape, eliminating the complex obstruction structure of traditional fixed spiral frames and greatly reducing the difficulty of cleaning.

[0019] After dewatering, the striking plate generates high-frequency vibration as the filter cartridge rotates, shaking off the sludge adhering to the inner wall of the filter cartridge; together with the collection trough and discharge trough, a through channel is formed, and the sludge can be quickly and centrally discharged without accumulation or residue, thus preventing the sludge from drying and clogging the filter cartridge pores at the source.

[0020] The components slide smoothly and are precisely positioned through the cooperation of the sliding groove, slider and airbag. The spiral shape does not shake or deform during operation. The elastic rod and the adjustment groove work together to make the tapping force moderate, which can ensure the cleaning effect without damaging the filter cartridge. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0022] Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is a schematic diagram of the filter cartridge section; Figure 3 This is a schematic diagram of the internal structure of the drum box; Figure 4 This is a schematic diagram of the structure of the first rotating ring section; Figure 5 This is a schematic diagram of the structure of the second rotating ring section; Figure 6 This is a schematic diagram of the transmission groove section; Figure 7 This is a structural schematic diagram of the fixing ring section; Figure 8 This is a structural schematic diagram of the multi-functional spiral frame section; Figure 9This is a state diagram showing the movement of adjacent scraper blocks; Figure 10 This is a schematic diagram of the vibrating plate section; Figure 11 This is a schematic diagram of the adjusting groove section.

[0023] The labels in the diagram represent: 1. Mounting frame; 2. Rotary drum box; 3. Filter cartridge; 4. First drive motor; 5. Transmission box; 6. Mixing box; 7. Feed pipe; 8. Fixing frame; 9. Second drive motor; 10. Mixing rack; 11. Water outlet rack; 12. Drive ring; 13. First rotating ring; 14. Second rotating ring; 15. Component block; 16. Striking plate; 17. First drive shaft; 18. Second drive shaft; 19. Discharge chute; 20. Feed inlet; 21. Guide slope; 22. Collection chute; 23. First chute; 24. Adjustment chute; 25. Protrusion; 26. Connecting plate; 27. Elastic rod; 28. First right-angle plate; 29. ​​Adjustment block; 30. First airbag; 31. Second airbag; 32. Connecting pipe. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] The present invention will be further described below with reference to embodiments.

[0026] Example 1:

[0027] refer to Figures 1-3 as well as Figure 8 A self-cleaning rotary drum structure includes a mounting frame 1 and a rotary drum box 2 mounted on the mounting frame 1, and a filter cartridge 3 rotatably mounted in the rotary drum box 2. A multi-functional spiral frame is rotatably mounted in the filter cartridge 3. The multi-functional spiral frame includes multiple component blocks 15, with two adjacent component blocks 15 slidably connected. The overall shape of the multi-functional spiral frame can be changed by sliding the component blocks 15. The overall shape of the multi-functional spiral frame includes a long strip shape and a spiral shape. A water outlet frame 11 is provided in the rotary drum box 2. Two water outlet frames 11 penetrate the inner wall of the rotary drum box 2 and are connected to a water inlet pipe. Multiple nozzles are provided at equal intervals on the water outlet frame 11. A material collection groove 22 is opened on the top wall of the component block 15. When the multi-functional spiral frame is in the long strip shape, the adjacent material collection grooves 22 are aligned. A material guiding slope 21 is opened on the side wall of the component block 15. When the multi-functional spiral frame is in the spiral shape, the adjacent material guiding slopes 21 are aligned.

[0028] In this embodiment, the multifunctional spiral frame is installed inside the filter cartridge 3 and is composed of multiple segments 15 that are slidably spliced ​​together in sequence; adjacent segments 15 can slide relative to each other, so that the multifunctional spiral frame can switch between a long strip shape and a spiral shape, realizing two working modes: material pushing and mixing, and self-cleaning.

[0029] Spiral shape: mixing and feeding: During sludge dewatering, the multi-functional spiral frame is adjusted to a spiral shape. Each component block 15 slides circumferentially in a staggered manner, and the guide inclined surfaces 21 on the side walls are aligned sequentially to form a continuous spiral guide surface. The rotation of the filter cylinder 3 drives the multi-functional spiral frame to rotate synchronously, stirring and mixing the sludge to prevent sedimentation and clumping. At the same time, it stably pushes the sludge to the discharge end along the axial direction, ensuring continuous dewatering and smooth discharge.

[0030] The components 15 slide together via the first slide groove 23 and the first slider. The slide groove is equipped with a first airbag 30, a second airbag 31 and a connecting pipe 32. The airbag pressure balance ensures smooth deformation, reliable positioning and stable spiral shape without deformation.

[0031] Long, narrow shape: Filter cartridge self-cleaning: After dehydration, the multi-functional spiral frame switches to a long strip shape. All component blocks 15 are reset and aligned, and the material collection troughs 22 on the top wall are connected in sequence to form a through discharge channel with the feed inlet 20 and discharge trough 19 of the first rotating ring 13.

[0032] When the filter cartridge 3 rotates, the protrusion 25 of the inner ring of the drive ring 12 periodically presses against the elastic rod 27 and the connecting plate 26, causing the striking plate 16 to vibrate up and down along the adjustment groove 24 of the second rotating ring 14, generating high-frequency vibration and striking the inner wall of the filter cartridge 3, causing the attached sludge to fall off.

[0033] The detached sludge falls into the collection trough 22, flows through the inlet 20 into the outlet trough 19 and is discharged without residue or secondary adhesion. The elongated shape has no spiral blades to obstruct it, and the inner wall of the filter cartridge is completely exposed. Combined with the water outlet frame 11 and the high-pressure flushing of the nozzle, it can achieve cleaning without dead corners.

[0034] Example 2:

[0035] refer to Figure 3A first rotating ring 13 is installed at one end of a multi-functional spiral frame, and a second rotating ring 14 is fixedly installed at the other end of the multi-functional spiral frame. A striking plate 16 is installed between the first rotating ring 13 and the second rotating ring 14. When the filter cartridge 3 rotates, the striking plate 16 vibrates up and down. The first rotating ring 13 is provided with a discharge groove 19, and the first rotating ring 13 is provided with a feed inlet 20 that communicates with the discharge groove 19. The feed inlet 20 is aligned with the collection groove 22. The second rotating ring 14 is provided with an adjustment groove 24, which is an unclosed circular ring. One end of the striking plate 16 is slidably installed in the adjustment groove 24, and the other end of the striking plate 16 is fixedly connected to the first rotating ring 13.

[0036] A first right-angle plate 28 is fixedly installed on the first rotating ring 13. Connecting plates 26 are fixedly installed on both ends of the striking plate 16. An adjusting block 29 is slidably installed in the adjusting groove 24. A second right-angle plate is connected to the adjusting block 29. An elastic rod 27 is connected between the connecting plate 26, the first right-angle plate 28, and the second right-angle plate. A driving ring 12 is fixedly installed on both ends of the filter cartridge 3. The two driving rings 12 are rotatably connected to the first rotating ring 13 and the second rotating ring 14 in a one-to-one correspondence. Multiple protrusions 25 are provided at equal intervals on the inner ring of the driving ring 12.

[0037] like Figure 3 As shown, the first drive shaft 17 drives the drive ring 12 to rotate, thereby causing the filter cartridge 3 to rotate. The second drive shaft 18 drives the first rotating ring 13 to rotate, and the first rotating ring 13 drives the second rotating ring 14 to rotate by pressing the inner wall of the adjusting groove 24 with the striking plate 16. Figure 5 As shown, the adjustment groove 24 is an open ring. Sliding to different ends of the adjustment groove 24 drives the component block 15 to slide, completing the transformation from a spiral shape to a long strip shape. When transformed into a long strip shape, it is located above the inside of the drum box 2. That is, during the self-cleaning process, only the filter cartridge 3 is rotating.

[0038] The mounting frame 1 is equipped with a first drive motor 4, and the output end of the first drive motor 4 is equipped with a transmission box 5. The mounting frame 1 is equipped with a mixing box 6, and a feed pipe 7 is connected between the mixing box 6 and the drum box 2. A fixed frame 8 is installed on the mixing box 6, and a mixing frame 10 is rotatably installed on the fixed frame 8. A second drive motor 9 for driving the mixing frame 10 to rotate is provided on the fixed frame 8.

[0039] A first sliding groove 23 is provided on one side of the component block 15, and a first slider adapted to the first sliding groove 23 is installed on the other side of the component block 15. A first airbag 30 and a second airbag 31 are respectively provided in the first sliding groove 23, and the first slider is located between the first airbag 30 and the second airbag 31. A connecting pipe 32 connects the first airbag 30 and the second airbag 31.

[0040] The first slide groove 23 is provided with a first airbag 30 and a second airbag 31. On the one hand, the compression of the airbag can improve the stability of the connection between adjacent component blocks 15. On the other hand, when the first slider slides, the gas in the first airbag 30 and the second airbag 31 will flow to each other through the connecting pipe. The purpose is that when the multi-functional spiral frame slides in a spiral shape, the first slide groove 23 will leak out, and the expansion of the second airbag 31 can prevent mud from entering the first slide groove 23.

[0041] The first rotating ring 13 and the second rotating ring 14 respectively support the two ends of the multi-functional spiral frame; one end of the striking plate 16 is elastically connected to the first rotating ring 13, and the other end is movably connected to the second rotating ring 14 through the adjusting block 29 and the elastic rod 27 to ensure that the vibration amplitude is moderate.

[0042] The mounting frame 1 is equipped with a first drive motor 4 and a transmission box 5, which drive the filter cartridge 3 to rotate; the mixing box 6, the mixing frame 10 and the second drive motor 9 complete the sludge premixing, and send it into the rotary drum box 2 through the feed pipe 7 to achieve continuous operation.

[0043] A rotary drum concentrator employs a self-cleaning rotary drum structure.

[0044] The whole machine integrates premixing, concentration, feeding and self-cleaning.

[0045] During operation, the multi-functional spiral frame is spiral-shaped to complete the mixing and feeding; when the machine is stopped for cleaning, it switches to a long strip shape, which, together with the knocking vibration and high-pressure washing, quickly removes the residual mud and dirt on the inner wall of the filter cartridge. It does not require disassembly and has no dead corners for cleaning, solving the problems of traditional fixed spiral frames or mixing frames being difficult to clean, easy to clog and scale, and significantly improving the service life and maintenance efficiency of the equipment.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-cleaning drum structure, comprising a mounting frame and a drum box mounted on the mounting frame, characterized in that, Also includes: A filter cartridge is rotatably installed in a drum box. A multi-functional spiral frame is rotatably installed in the filter cartridge. The multi-functional spiral frame includes multiple component blocks. Two adjacent component blocks are slidably connected. The overall shape of the multi-functional spiral frame can be changed by sliding the component blocks. The overall shape of the multi-functional spiral frame includes a strip shape and a spiral shape. A first rotating ring is installed at one end of a multifunctional spiral frame, and a second rotating ring is fixedly installed at the other end of the multifunctional spiral frame. A striking plate is installed between the first and second rotating rings, and the striking plate vibrates up and down when the filter cartridge rotates.

2. The self-cleaning drum structure according to claim 1, characterized in that, The drum box is equipped with a water outlet frame. Two water outlet frames penetrate the inner wall of the drum box and are connected to a water inlet pipe. Multiple nozzles are evenly spaced on the water outlet frames.

3. The self-cleaning drum structure according to claim 1, characterized in that, The top wall of the component block is provided with a material collection trough, and when the multifunctional spiral frame is long and narrow, the adjacent material collection troughs are aligned.

4. The self-cleaning drum structure according to claim 1, characterized in that, The sidewalls of the component block are provided with guide slopes, and when the multifunctional spiral frame is spiral in shape, the adjacent guide slopes are aligned.

5. The self-cleaning drum structure according to claim 3, characterized in that, The first rotating ring is provided with a discharge trough, and the first rotating ring is provided with a feed inlet that communicates with the discharge trough. The feed inlet and the collection trough are aligned.

6. The self-cleaning drum structure according to claim 1, characterized in that, The second rotating ring has an adjustment groove, which is an open annular shape. One end of the striking plate is slidably installed in the adjustment groove, and the other end of the striking plate is fixedly connected to the first rotating ring.

7. The self-cleaning drum structure according to claim 6, characterized in that, A first right-angle plate is fixedly installed on the first rotating ring. Connecting plates are fixedly installed at both ends of the striking plate. An adjusting block is slidably installed in the adjusting groove. A second right-angle plate is connected to the adjusting block. An elastic rod is connected between the connecting plate and the first right-angle plate and the second right-angle plate. A driving ring is fixedly installed at both ends of the filter cartridge. The two driving rings are rotatably connected to the first rotating ring and the second rotating ring in a one-to-one correspondence. Multiple protrusions are provided at equal intervals on the inner ring of the driving ring.

8. The self-cleaning drum structure according to claim 1, characterized in that, The component block has a first sliding groove on one side and a first slider adapted to the first sliding groove on the other side. The first sliding groove is respectively provided with a first airbag and a second airbag, and the first slider is located between the first airbag and the second airbag. A connecting tube connects the first airbag and the second airbag.

9. The self-cleaning drum structure according to claim 1, characterized in that, The mounting bracket is equipped with a first drive motor, and the output end of the first drive motor is equipped with a transmission box.

10. The self-cleaning drum structure according to claim 1, characterized in that, The mounting frame is equipped with a mixing tank, and a feed pipe is connected between the mixing tank and the rotary drum box.

11. The self-cleaning drum structure according to claim 10, characterized in that, The mixing tank is equipped with a fixed frame, on which a mixing rack is rotatably mounted, and a second drive motor for driving the mixing rack to rotate is provided on the fixed frame.

12. A rotary drum concentrator, employing a self-cleaning rotary drum structure as described in any one of claims 1-11.

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